Using the simulation test facility designed on the basis of similitude principle,the authors of the paper carry out a series of simulation tests and study the influence of effective factors on the stress in the freezi...Using the simulation test facility designed on the basis of similitude principle,the authors of the paper carry out a series of simulation tests and study the influence of effective factors on the stress in the freezing pipes during both periods of active freezing and excavating-lining.They obtain preliminarily the regularity of stress variation and discuss the causes of freezing pipe fracture.展开更多
A set of serf-developed apparatus for foundation physical model were utilized to conduct model tests of the multi-element composite foundation with a steel pipe pile and several gravel piles. Some load-bearing charact...A set of serf-developed apparatus for foundation physical model were utilized to conduct model tests of the multi-element composite foundation with a steel pipe pile and several gravel piles. Some load-bearing characteristics of the multi-element Composite foundation, including the curves of foundation settlement, stresses of piles, pile-soil stress ratio, and load-sharing ratio of piles and soil, were obtained to study its working performances in silty sand soil. The experimental results revealed that the multi-element composite foundation with steel pipe pile and gravel pile contributed more than the gravel pile composite foundation in improving the bearing capacity of the silty fine sand.展开更多
文摘Using the simulation test facility designed on the basis of similitude principle,the authors of the paper carry out a series of simulation tests and study the influence of effective factors on the stress in the freezing pipes during both periods of active freezing and excavating-lining.They obtain preliminarily the regularity of stress variation and discuss the causes of freezing pipe fracture.
基金The National Natural Science Foundation of China (No.50478090)
文摘A set of serf-developed apparatus for foundation physical model were utilized to conduct model tests of the multi-element composite foundation with a steel pipe pile and several gravel piles. Some load-bearing characteristics of the multi-element Composite foundation, including the curves of foundation settlement, stresses of piles, pile-soil stress ratio, and load-sharing ratio of piles and soil, were obtained to study its working performances in silty sand soil. The experimental results revealed that the multi-element composite foundation with steel pipe pile and gravel pile contributed more than the gravel pile composite foundation in improving the bearing capacity of the silty fine sand.
