The application of grouting technology in housing construction is to inject liquid grout into the cavities and cracks of housing construction.After it solidifies,the stability of housing construction can be improved.G...The application of grouting technology in housing construction is to inject liquid grout into the cavities and cracks of housing construction.After it solidifies,the stability of housing construction can be improved.Grouting technology is not only very convenient but is also environmental-friendly,and it is relatively low-cost.Therefore,it is widely used in housing construction.In this paper,the types of grouting technology and its application advantages in housing construction are analyzed,and specific application strategies are put forward,in hopes of improving the quality of housing construction.展开更多
Grouting technology is a fairly fast operation technology, because grouting technology can not only speed up the operation process of civil projects, but also enhance the quality of construction projects. Compared wit...Grouting technology is a fairly fast operation technology, because grouting technology can not only speed up the operation process of civil projects, but also enhance the quality of construction projects. Compared with the previous grouting process, the new grouting process improves the loopholes in the previous grouting process. It is precisely because of these deficiencies that the building is prone to quality problems. With the rapid progress of science and technology and the continuous innovation of equipment, people have made great updates and changes on the premise of grouting technology. The grouting technology has been completed and improved on the original premise. Computer-based automation can be completed with the help of polymer materials. In addition, the use of grouting technology enhances the quality and stability of construction projects.展开更多
The construction of water conservancy and hydropower projects is complex and systematic. Grouting construction is the main link, and the quality of grouting will have a direct impact on the project quality. Grouting c...The construction of water conservancy and hydropower projects is complex and systematic. Grouting construction is the main link, and the quality of grouting will have a direct impact on the project quality. Grouting construction has the most direct impact on the anti-seepage performance and operation safety of water conservancy and hydropower projects. Therefore, in the process of specific construction, we should pay attention to the sustainability of grouting technology selection, and improve the technical level of grouting construction as much as possible. Next, the paper analyzes the application of grouting technology in dam construction of water conservancy and hydropower projects.展开更多
Aiming at the underground dynamic water inrush point, this paper finds out the water inrush channel in a short time by applying the directional drilling technology of multi-branch horizontal drilling and vertical dril...Aiming at the underground dynamic water inrush point, this paper finds out the water inrush channel in a short time by applying the directional drilling technology of multi-branch horizontal drilling and vertical drilling, effectively blocks the water inrush channel in strong aquifer by grouting, cuts off the water supply, relieves the hidden danger of mine water disaster, ensures the normal production of working face and reduces economic losses. According to the actual situation of karst development and injectability of the injected aquifer, reasonably select grouting materials and parameters;According to the crack development and slurry running during grouting, reasonably add aggregate.展开更多
Water conservancy and hydropower projects are also a very important livelihood project, which must be paid attention to the application and improvement of grouting use technology, so as to promote the sustainable deve...Water conservancy and hydropower projects are also a very important livelihood project, which must be paid attention to the application and improvement of grouting use technology, so as to promote the sustainable development of water conservancy and hydropower projects. Is the so-called foundation stability, foundation grouting is a reliable means of correction and governance of engineering foundation quality, water conservancy and hydropower engineering foundation grouting needs to combine the specific requirements of the actual engineering, generally by professional organization team, also need to be in the specific construction process constantly find problems and solve problems, gradually optimize and innovation grouting slurry and construction process.展开更多
The rapid development of urban rail transit has posed increasing construction and operational challenges for metro tunnels,often leading to structural damage.Grouting technology using cement-based materials is widely ...The rapid development of urban rail transit has posed increasing construction and operational challenges for metro tunnels,often leading to structural damage.Grouting technology using cement-based materials is widely applied to address issues such as seepage,leakage,and alignment correction in shield tunnels.This study investigates the additional stress induced by grouting in silty soil layers,using cement-based grouts with different water-to-cement ratios and polyurethane-modified cement-based materials.Results show that additional stress decreases with depth and is more influenced by horizontal distance from the grouting point.In staged grouting,the first injection phase contributes about 50%of the peak additional stress.A lower water-to-cement ratio(e.g.,0.6)increases additional stress but reduces grout flowability,while a higher ratio improves diffusion but increases the risk of grout loss.(≥1.0)The polyurethane-modified cement-based material enhances stress transfer performance,increasing peak additional stress by approximately 10%.These findings provide theoretical guidance for optimizing material selection and grouting design in metro tunnel repair within silty soil layers.展开更多
By using new materials and technologies, the traditional road maintenance method is reformed, so that the pavement strength meets the design requirements. Through engineering practice, its application and environmenta...By using new materials and technologies, the traditional road maintenance method is reformed, so that the pavement strength meets the design requirements. Through engineering practice, its application and environmental protection function are good, and the practice test shows that the method has the advantages of low investment, high speed, little pollution and little interference, which can effectively prolong the service life of the road and basically realize the reinforcement of the pavement structure which is not excavated all day.展开更多
High-pressure jet grouting construction technology is widely used in water conservancy and hydropower projects at present. The application of this construction technology can not only improve the bearing capacity of t...High-pressure jet grouting construction technology is widely used in water conservancy and hydropower projects at present. The application of this construction technology can not only improve the bearing capacity of the foundation and strengthen the foundation, but also can be applied in anti-seepage construction. Because of its obvious application advantages in water conservancy and hydropower projects, it is highly recognized by construction personnel. The author explores and analyzes the construction technology and technical principle of high-pressure jet grouting, and puts forward the specific application of this construction technology, hoping to help improve the construction level of water conservancy and hydropower projects.展开更多
The simplified mechanical model and finite element model are established on the basis of the measured results and analysis of the grouting pile deformation monitoring,surface horizontal displacement and vertical displ...The simplified mechanical model and finite element model are established on the basis of the measured results and analysis of the grouting pile deformation monitoring,surface horizontal displacement and vertical displacement monitoring,deep horizontal displacement(inclinometer)monitoring,soil pressure monitoring and seepage pressure monitoring in the lower reaches of Wuan River regulation project in Shishi,Fujian Province.The mechanical behavior and deformation performance of mould-bag pile retaining wall formed after controlled cement grouting in the silty stratum of the test section are analyzed and compared.The results show that the use of controlled cement grouting mould-bag pile technology is to strengthen the soft stratum for sealing water and reinforcement,so that it can rock into a retaining wall,which can both retain soil and seal water with excellent effect.The control of cement grouting technology not only makes the soft soil rock in the range of retaining wall of mould-bag pile,but also makes a wide range of soil around the mould-bag pile squeeze and embed to compaction;and its cohesion and internal friction angle increased,so as to achieve the purpose of reducing soil pressure and improving mechanical and deformation properties of retaining wall.展开更多
Biocementation-based soil improvement is an emerging ground treatment method in geotechnical engineering that has garnered extensive attention over the past two decades.One of the challenges associated with this metho...Biocementation-based soil improvement is an emerging ground treatment method in geotechnical engineering that has garnered extensive attention over the past two decades.One of the challenges associated with this method revolves around the uniformity of biocementation,a crucial factor closely tied to bio-grouting technology.The traditional biotreatment methods,the two-phase method and the one-phase method,suffer from the issue of non-uniform biocementation.Consequently,in recent years,various improved grouting technologies have been proposed to address this concern by aiding bacterial adsorption and controlling carbonate precipitation.This paper reviews the mechanisms and grouting processes employed in these enhanced bio-grouting technologies.Additionally,the challenges of implementing these grouting technologies in real-world applications are also thoroughly discussed.展开更多
Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in ex...Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in extent. Furthermore, due to the different heights of mountains and the lengths of tunnels, the locations of the unfavorable geological sections cannot be fully determined before construction, which increases the risk of water inrush and mud gushing. Based on numerous cases of water inrush and mud gushing in railway tunnels, the paper tries to classify water inrush and mud gushing in railway tunnels in view of the conditions of the surrounding rocks and meteorological factors associated with tunnel excavation. In addition, the causes of water inrush and mud gushing in combination of macroand micromechanisms are summarized, and site-specifc treatment method is put forward. The treatment methods include choosing a method of advance geological forecast according to risk degrees of different sections in the tunnel, determining the items of predictions, and choosing the appropriate methods, i.e. draining-oriented method, blocking-oriented method or draining-and-blocking method. The treatment technologies of railway water inrush and mud gushing are also summarized, including energy relief and pressure relief technology, advance grouting technology, and advance jet grouting technology associated with their key technical features and applicable conditions. The results in terms of treatment methods can provide reference to the prevention and treatment of tunnel water inrush and mud gushing.展开更多
The application of pile-end post-grouting piles for super-large bridge pile foundations in some important projects was introduced in this paper.There are totally 21 test piles.The maximum pile diameter varies from 2.5...The application of pile-end post-grouting piles for super-large bridge pile foundations in some important projects was introduced in this paper.There are totally 21 test piles.The maximum pile diameter varies from 2.5 m to 3 m,and the maximum length is 125m;the bearing capacity of the post-grouting piles is over ten thousands tons.Based on the test results,the bearing capacity,displacement,and beating characteristics before and after grouting were analyzed.The results show that the beating capacity of the piles is increased in different degrees after grouting although the technical parameters,including the patterns of grouting pipes,pressure,dosages of cement,duration of grouting lasting time,are different.However,the obtained values are very discrete.In addition,the calculation formula for the post-grouting piles under specified grouting condition was deduced based on the statistics analysis results of 57 test piles.The research results have been applied in the design of bridge foundation.展开更多
文摘The application of grouting technology in housing construction is to inject liquid grout into the cavities and cracks of housing construction.After it solidifies,the stability of housing construction can be improved.Grouting technology is not only very convenient but is also environmental-friendly,and it is relatively low-cost.Therefore,it is widely used in housing construction.In this paper,the types of grouting technology and its application advantages in housing construction are analyzed,and specific application strategies are put forward,in hopes of improving the quality of housing construction.
文摘Grouting technology is a fairly fast operation technology, because grouting technology can not only speed up the operation process of civil projects, but also enhance the quality of construction projects. Compared with the previous grouting process, the new grouting process improves the loopholes in the previous grouting process. It is precisely because of these deficiencies that the building is prone to quality problems. With the rapid progress of science and technology and the continuous innovation of equipment, people have made great updates and changes on the premise of grouting technology. The grouting technology has been completed and improved on the original premise. Computer-based automation can be completed with the help of polymer materials. In addition, the use of grouting technology enhances the quality and stability of construction projects.
文摘The construction of water conservancy and hydropower projects is complex and systematic. Grouting construction is the main link, and the quality of grouting will have a direct impact on the project quality. Grouting construction has the most direct impact on the anti-seepage performance and operation safety of water conservancy and hydropower projects. Therefore, in the process of specific construction, we should pay attention to the sustainability of grouting technology selection, and improve the technical level of grouting construction as much as possible. Next, the paper analyzes the application of grouting technology in dam construction of water conservancy and hydropower projects.
文摘Aiming at the underground dynamic water inrush point, this paper finds out the water inrush channel in a short time by applying the directional drilling technology of multi-branch horizontal drilling and vertical drilling, effectively blocks the water inrush channel in strong aquifer by grouting, cuts off the water supply, relieves the hidden danger of mine water disaster, ensures the normal production of working face and reduces economic losses. According to the actual situation of karst development and injectability of the injected aquifer, reasonably select grouting materials and parameters;According to the crack development and slurry running during grouting, reasonably add aggregate.
文摘Water conservancy and hydropower projects are also a very important livelihood project, which must be paid attention to the application and improvement of grouting use technology, so as to promote the sustainable development of water conservancy and hydropower projects. Is the so-called foundation stability, foundation grouting is a reliable means of correction and governance of engineering foundation quality, water conservancy and hydropower engineering foundation grouting needs to combine the specific requirements of the actual engineering, generally by professional organization team, also need to be in the specific construction process constantly find problems and solve problems, gradually optimize and innovation grouting slurry and construction process.
基金supported by the National Natural Science Foundation of China(No.42477185)Natural Science Foundation of Zhejiang Province(LQ24A020015)+1 种基金Research Achievement Award Cultivation Project of Zhejiang University of Science and Technology(2023JLYB001)the Postgraduate Course Construction Project of Zhejiang University of Science and Technology(2024yjskj05).
文摘The rapid development of urban rail transit has posed increasing construction and operational challenges for metro tunnels,often leading to structural damage.Grouting technology using cement-based materials is widely applied to address issues such as seepage,leakage,and alignment correction in shield tunnels.This study investigates the additional stress induced by grouting in silty soil layers,using cement-based grouts with different water-to-cement ratios and polyurethane-modified cement-based materials.Results show that additional stress decreases with depth and is more influenced by horizontal distance from the grouting point.In staged grouting,the first injection phase contributes about 50%of the peak additional stress.A lower water-to-cement ratio(e.g.,0.6)increases additional stress but reduces grout flowability,while a higher ratio improves diffusion but increases the risk of grout loss.(≥1.0)The polyurethane-modified cement-based material enhances stress transfer performance,increasing peak additional stress by approximately 10%.These findings provide theoretical guidance for optimizing material selection and grouting design in metro tunnel repair within silty soil layers.
文摘By using new materials and technologies, the traditional road maintenance method is reformed, so that the pavement strength meets the design requirements. Through engineering practice, its application and environmental protection function are good, and the practice test shows that the method has the advantages of low investment, high speed, little pollution and little interference, which can effectively prolong the service life of the road and basically realize the reinforcement of the pavement structure which is not excavated all day.
文摘High-pressure jet grouting construction technology is widely used in water conservancy and hydropower projects at present. The application of this construction technology can not only improve the bearing capacity of the foundation and strengthen the foundation, but also can be applied in anti-seepage construction. Because of its obvious application advantages in water conservancy and hydropower projects, it is highly recognized by construction personnel. The author explores and analyzes the construction technology and technical principle of high-pressure jet grouting, and puts forward the specific application of this construction technology, hoping to help improve the construction level of water conservancy and hydropower projects.
基金The work is supported by the National Natural Science Foundation of China(No.51578253)Scientific and Technological Planning Project of Xiamen City(Nos.3502Z20172011 and 3502Z20172014)+1 种基金Scientific and Technological Planning Project of Quanzhou City(No.2018C083R)Reform study of graduate education and teaching of Huaqiao University in 2018(No.18YJG55).
文摘The simplified mechanical model and finite element model are established on the basis of the measured results and analysis of the grouting pile deformation monitoring,surface horizontal displacement and vertical displacement monitoring,deep horizontal displacement(inclinometer)monitoring,soil pressure monitoring and seepage pressure monitoring in the lower reaches of Wuan River regulation project in Shishi,Fujian Province.The mechanical behavior and deformation performance of mould-bag pile retaining wall formed after controlled cement grouting in the silty stratum of the test section are analyzed and compared.The results show that the use of controlled cement grouting mould-bag pile technology is to strengthen the soft stratum for sealing water and reinforcement,so that it can rock into a retaining wall,which can both retain soil and seal water with excellent effect.The control of cement grouting technology not only makes the soft soil rock in the range of retaining wall of mould-bag pile,but also makes a wide range of soil around the mould-bag pile squeeze and embed to compaction;and its cohesion and internal friction angle increased,so as to achieve the purpose of reducing soil pressure and improving mechanical and deformation properties of retaining wall.
基金support by the National Natural Science Foundation of China(NSFC)(Grant Nos.52178319,52108307,52078236,51878313,51708243)the Natural Science Foundation of Fujian Province,China(Grant Nos.2022J05020,2022J05127).
文摘Biocementation-based soil improvement is an emerging ground treatment method in geotechnical engineering that has garnered extensive attention over the past two decades.One of the challenges associated with this method revolves around the uniformity of biocementation,a crucial factor closely tied to bio-grouting technology.The traditional biotreatment methods,the two-phase method and the one-phase method,suffer from the issue of non-uniform biocementation.Consequently,in recent years,various improved grouting technologies have been proposed to address this concern by aiding bacterial adsorption and controlling carbonate precipitation.This paper reviews the mechanisms and grouting processes employed in these enhanced bio-grouting technologies.Additionally,the challenges of implementing these grouting technologies in real-world applications are also thoroughly discussed.
文摘Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in extent. Furthermore, due to the different heights of mountains and the lengths of tunnels, the locations of the unfavorable geological sections cannot be fully determined before construction, which increases the risk of water inrush and mud gushing. Based on numerous cases of water inrush and mud gushing in railway tunnels, the paper tries to classify water inrush and mud gushing in railway tunnels in view of the conditions of the surrounding rocks and meteorological factors associated with tunnel excavation. In addition, the causes of water inrush and mud gushing in combination of macroand micromechanisms are summarized, and site-specifc treatment method is put forward. The treatment methods include choosing a method of advance geological forecast according to risk degrees of different sections in the tunnel, determining the items of predictions, and choosing the appropriate methods, i.e. draining-oriented method, blocking-oriented method or draining-and-blocking method. The treatment technologies of railway water inrush and mud gushing are also summarized, including energy relief and pressure relief technology, advance grouting technology, and advance jet grouting technology associated with their key technical features and applicable conditions. The results in terms of treatment methods can provide reference to the prevention and treatment of tunnel water inrush and mud gushing.
基金The research was supported by China State Science and Technology Supporting Program(No.2006BAG04B01).
文摘The application of pile-end post-grouting piles for super-large bridge pile foundations in some important projects was introduced in this paper.There are totally 21 test piles.The maximum pile diameter varies from 2.5 m to 3 m,and the maximum length is 125m;the bearing capacity of the post-grouting piles is over ten thousands tons.Based on the test results,the bearing capacity,displacement,and beating characteristics before and after grouting were analyzed.The results show that the beating capacity of the piles is increased in different degrees after grouting although the technical parameters,including the patterns of grouting pipes,pressure,dosages of cement,duration of grouting lasting time,are different.However,the obtained values are very discrete.In addition,the calculation formula for the post-grouting piles under specified grouting condition was deduced based on the statistics analysis results of 57 test piles.The research results have been applied in the design of bridge foundation.
