Combined with practical engineering, based on the introduction of soil arching theory, we explore the impact of barrier piles in blind sheet-pile bank connecting structure. Besides, we build a plane strain model by AB...Combined with practical engineering, based on the introduction of soil arching theory, we explore the impact of barrier piles in blind sheet-pile bank connecting structure. Besides, we build a plane strain model by ABAQUS sot＇cware to study the impact of cross section type, the pile spacing and soil properties on soil arching effect. We find that cross section type of the pile has a certain influence on soil stress distribution in front of the barrier piles by comparing circular cross section and rectangular cross section. We also find that clear distance between the barrier piles and cohesive force of the soil have a great influence on that impact. We can increase clear distance between the barrier piles appropriately to improve the efficiency of construction and reduce the proiect cost.展开更多
In this paper, firstly, the characteristics of sheet-piled wharf construction are introduced. And then, six aspects of sheet-piled wharf construction are discussed： sheet pile, anchorage structure, guiding girder, an...In this paper, firstly, the characteristics of sheet-piled wharf construction are introduced. And then, six aspects of sheet-piled wharf construction are discussed： sheet pile, anchorage structure, guiding girder, anchor rod, backfilling behind sheet pile wall, superstructure of sheet-piled wharf etc. The construction of sheet pile involves piling on the land or piling？on？the sea, piling methods, piling patterns, guide frame, embedding sheet piles etc.展开更多
Engineered cementitious composites(ECC)are highly ductile materials with excellent crack control capabilities,making them well-suited for structural applications requiring enhanced durability and resilience.In mountai...Engineered cementitious composites(ECC)are highly ductile materials with excellent crack control capabilities,making them well-suited for structural applications requiring enhanced durability and resilience.In mountainous engineering construction,stabilizing high-steep slopes presents a significant challenge,with sheet-pile walls commonly employed to improve seismic stability.To assess the effectiveness of ECC in such applications,this study conducted two comparative shaking table tests to investigate the seismic performance of high-steep slopes supported by ECC sheet-pile walls.The failure modes,acceleration responses,dynamic earth pressure responses,bending moments of anti-sliding piles,and lateral displacement responses of the ECC-supported slope were systematically analyzed and compared with those of slopes supported by traditional reinforced concrete(RC)sheet-pile walls.The test results indicate that ECC-supported slopes exhibited significantly better seismic performance than RC-supported slopes.ECC sheet-pile wall maintained structural integrity at higher seismic intensities(PGA=1.2g)compared with RC walls,which failed at PGA=1.0g.Under the same seismic loading,ECC-supported slopes demonstrated lower acceleration amplitudes,acceleration amplification factors,acceleration response spectra,and dynamic amplification factors compared with RC-supported slopes.Moreover,the dynamic bending moments of ECC anti-slide piles were approximately 70%-90% of those of RC anti-slide piles.Significant differences were also observed between the two support systems in terms of dynamic earth pressure distribution and residual displacement development.These findings confirmed the potential of ECC as an advanced material for enhancing high-steep slope stability in mountainous regions,providing a valuable reference for slope stabilization and landslide mitigation in seismic areas.展开更多
Some new innovative constructions and technologies for improvement of port structures are worked out and discussed. The aims of innovations are to increase structures＇ reliability, to decrease cost of construction an...Some new innovative constructions and technologies for improvement of port structures are worked out and discussed. The aims of innovations are to increase structures＇ reliability, to decrease cost of construction and maintenance, to simplify technology and cost of building. For these purposes either some main bearing elements or structures in whole are modified or improved. In particular different improved waterfront constructions as well as retaining walls and coastal protection （gravity, piled, sheet piling, etc.） for use in various soil conditions are outlined. One of them incorporates trapezoidal blocks forming columns, each block in the column contacts the others either with smaller or larger bases. Another design incorporates blocks that are constructed with holes ran through the centres of gravity of the blocks. Rigid cylinder element running through the holes of several adjacent blocks allows them to be joined forming large size units, The structure consisting of wedge form retaining wall is original but simple to construct, Some new designs based on perfection of sheet-piling walls （sheet piles with curvilinear cross-section having a form of semi-rings） are proposed for different applications. Proposals on modernization of some traditional structures and technologies are discussed.展开更多
Some new innovative constructions and piling technologies for improvement of offshore and port berthing structures are worked out and discussed. The aims of innovations are to decrease required power of construction ...Some new innovative constructions and piling technologies for improvement of offshore and port berthing structures are worked out and discussed. The aims of innovations are to decrease required power of construction （in particular, piling） equipment and, correspondingly, to improve environmental situation at the construction site. Another achieved goal is providing long tubular piles installation in hard soils conditions without application of very heavy and powerful driving machines. Worked out solutions are based on two approaches. One of them provides separate loading of driving force on pile＇s shaft and pile＇s tip concentrating the whole driving force on one of the mentioned parts of the pile. Another approach is focused on prevention of soil plug formation inside of the tubular pile tip facilitating the pile installation process. Also improved anchorage system for sheet piling seafront walls is presented and discussed. All considered innovations are patented and can be used in wide range of marine, offshore, coastal and harbor structures.展开更多
文摘Combined with practical engineering, based on the introduction of soil arching theory, we explore the impact of barrier piles in blind sheet-pile bank connecting structure. Besides, we build a plane strain model by ABAQUS sot＇cware to study the impact of cross section type, the pile spacing and soil properties on soil arching effect. We find that cross section type of the pile has a certain influence on soil stress distribution in front of the barrier piles by comparing circular cross section and rectangular cross section. We also find that clear distance between the barrier piles and cohesive force of the soil have a great influence on that impact. We can increase clear distance between the barrier piles appropriately to improve the efficiency of construction and reduce the proiect cost.
文摘In this paper, firstly, the characteristics of sheet-piled wharf construction are introduced. And then, six aspects of sheet-piled wharf construction are discussed： sheet pile, anchorage structure, guiding girder, anchor rod, backfilling behind sheet pile wall, superstructure of sheet-piled wharf etc. The construction of sheet pile involves piling on the land or piling？on？the sea, piling methods, piling patterns, guide frame, embedding sheet piles etc.
基金supported by the National Natural Science Foundation of China(Grant Nos.U2268213,52178312)the S&T Program of Hebei(Grant No.23567602H)。
文摘Engineered cementitious composites(ECC)are highly ductile materials with excellent crack control capabilities,making them well-suited for structural applications requiring enhanced durability and resilience.In mountainous engineering construction,stabilizing high-steep slopes presents a significant challenge,with sheet-pile walls commonly employed to improve seismic stability.To assess the effectiveness of ECC in such applications,this study conducted two comparative shaking table tests to investigate the seismic performance of high-steep slopes supported by ECC sheet-pile walls.The failure modes,acceleration responses,dynamic earth pressure responses,bending moments of anti-sliding piles,and lateral displacement responses of the ECC-supported slope were systematically analyzed and compared with those of slopes supported by traditional reinforced concrete(RC)sheet-pile walls.The test results indicate that ECC-supported slopes exhibited significantly better seismic performance than RC-supported slopes.ECC sheet-pile wall maintained structural integrity at higher seismic intensities(PGA=1.2g)compared with RC walls,which failed at PGA=1.0g.Under the same seismic loading,ECC-supported slopes demonstrated lower acceleration amplitudes,acceleration amplification factors,acceleration response spectra,and dynamic amplification factors compared with RC-supported slopes.Moreover,the dynamic bending moments of ECC anti-slide piles were approximately 70%-90% of those of RC anti-slide piles.Significant differences were also observed between the two support systems in terms of dynamic earth pressure distribution and residual displacement development.These findings confirmed the potential of ECC as an advanced material for enhancing high-steep slope stability in mountainous regions,providing a valuable reference for slope stabilization and landslide mitigation in seismic areas.
文摘Some new innovative constructions and technologies for improvement of port structures are worked out and discussed. The aims of innovations are to increase structures＇ reliability, to decrease cost of construction and maintenance, to simplify technology and cost of building. For these purposes either some main bearing elements or structures in whole are modified or improved. In particular different improved waterfront constructions as well as retaining walls and coastal protection （gravity, piled, sheet piling, etc.） for use in various soil conditions are outlined. One of them incorporates trapezoidal blocks forming columns, each block in the column contacts the others either with smaller or larger bases. Another design incorporates blocks that are constructed with holes ran through the centres of gravity of the blocks. Rigid cylinder element running through the holes of several adjacent blocks allows them to be joined forming large size units, The structure consisting of wedge form retaining wall is original but simple to construct, Some new designs based on perfection of sheet-piling walls （sheet piles with curvilinear cross-section having a form of semi-rings） are proposed for different applications. Proposals on modernization of some traditional structures and technologies are discussed.
文摘Some new innovative constructions and piling technologies for improvement of offshore and port berthing structures are worked out and discussed. The aims of innovations are to decrease required power of construction （in particular, piling） equipment and, correspondingly, to improve environmental situation at the construction site. Another achieved goal is providing long tubular piles installation in hard soils conditions without application of very heavy and powerful driving machines. Worked out solutions are based on two approaches. One of them provides separate loading of driving force on pile＇s shaft and pile＇s tip concentrating the whole driving force on one of the mentioned parts of the pile. Another approach is focused on prevention of soil plug formation inside of the tubular pile tip facilitating the pile installation process. Also improved anchorage system for sheet piling seafront walls is presented and discussed. All considered innovations are patented and can be used in wide range of marine, offshore, coastal and harbor structures.
