As a new type of bridge foundation, Lattice-Shaped Diaphragm Wall （hereinafter for LSDW） is highly concerned in relevant construction area but its research is far from achievement. Based on PFC2D, the soil arching e...As a new type of bridge foundation, Lattice-Shaped Diaphragm Wall （hereinafter for LSDW） is highly concerned in relevant construction area but its research is far from achievement. Based on PFC2D, the soil arching effect of LSDWs is studied thoroughly in this paper and the special attention is given to its influencing factors. It turns out to be that a differential wall-soil settlement can be found at the lower location of soil core of an LSDW which is one of the trigger factors of soil arching; meanwhile, the differential settlement degree can reflect the exertion degree of soil arching; the shape of soil arching is basically a hemisphere which can be explained by the theory proposed by Hewlett and Randolph; normally, the chamber number is a negative factor for the development of soil arching; the soil arching effect is significantly influenced by the distance of two adjacent wall elements and the foundation depth, and a relatively large or small value of these factors is disadvantageous to the exertion of soil arching; in addition, the soil arching effect increase with the growth of stiffness and friction coefficient of particles and the friction coefficient of particles has insignificant influence on the development of soil arching effect compared with particle stiffness.展开更多
Background:Bite mark identification is based on the individuality of a dentition and helps in identifying the perpetrator.The use of three-dimensional(3D)analysis of forensic evidence is highlighted in comparison with...Background:Bite mark identification is based on the individuality of a dentition and helps in identifying the perpetrator.The use of three-dimensional(3D)analysis of forensic evidence is highlighted in comparison with traditional methods.CBCT has been used in registering bite mark on food material.To our knowledge this is the first study where CBCT is used to register bite mark from human forearm.Aims and Objective:To signify the potential of CBCT in registering and analysing the bite mark on human skin and to analyse various identifying parameters.Materials and Method:60 subjects of either sex were asked to bite their own forearm and alginate impression of the maxillary and mandible dentition was taken and cast was poured.Both bitemark and cast was subjected to CBCT scanning and parameters like arch shape,inter canine width,mesio distal dimension of anterior teeth,and individual characteristics like rotation,buccal/lingual tilting of teeth was noted and compared and assigned a score using simplified version ofABFO scoring system.Results:Highly significant result with 56.6%definite match,26.66%probable match and 16.66%possible match were obtained using CBCT.Conclusion:CBCT is a non-destructive,accurate,efficient,objective and reproducible method.Out of all parameter mesio-distal dimension of teeth is the best parameter to judge the bitemark on skin.展开更多
文摘As a new type of bridge foundation, Lattice-Shaped Diaphragm Wall （hereinafter for LSDW） is highly concerned in relevant construction area but its research is far from achievement. Based on PFC2D, the soil arching effect of LSDWs is studied thoroughly in this paper and the special attention is given to its influencing factors. It turns out to be that a differential wall-soil settlement can be found at the lower location of soil core of an LSDW which is one of the trigger factors of soil arching; meanwhile, the differential settlement degree can reflect the exertion degree of soil arching; the shape of soil arching is basically a hemisphere which can be explained by the theory proposed by Hewlett and Randolph; normally, the chamber number is a negative factor for the development of soil arching; the soil arching effect is significantly influenced by the distance of two adjacent wall elements and the foundation depth, and a relatively large or small value of these factors is disadvantageous to the exertion of soil arching; in addition, the soil arching effect increase with the growth of stiffness and friction coefficient of particles and the friction coefficient of particles has insignificant influence on the development of soil arching effect compared with particle stiffness.
文摘Background:Bite mark identification is based on the individuality of a dentition and helps in identifying the perpetrator.The use of three-dimensional(3D)analysis of forensic evidence is highlighted in comparison with traditional methods.CBCT has been used in registering bite mark on food material.To our knowledge this is the first study where CBCT is used to register bite mark from human forearm.Aims and Objective:To signify the potential of CBCT in registering and analysing the bite mark on human skin and to analyse various identifying parameters.Materials and Method:60 subjects of either sex were asked to bite their own forearm and alginate impression of the maxillary and mandible dentition was taken and cast was poured.Both bitemark and cast was subjected to CBCT scanning and parameters like arch shape,inter canine width,mesio distal dimension of anterior teeth,and individual characteristics like rotation,buccal/lingual tilting of teeth was noted and compared and assigned a score using simplified version ofABFO scoring system.Results:Highly significant result with 56.6%definite match,26.66%probable match and 16.66%possible match were obtained using CBCT.Conclusion:CBCT is a non-destructive,accurate,efficient,objective and reproducible method.Out of all parameter mesio-distal dimension of teeth is the best parameter to judge the bitemark on skin.
