EXPERIMENTAL STUDY ON COLLAPSIBILITY EVALUATION AND TREATMENT DEPTHS OF COLLAPSIBLE LOESS UPON SELF WEIGHT WITH THICK DEPTH
YANG Xiaohui1，HUANG Xuefeng1，2，ZHU Yanpeng1，YAO Zhihua2，ZHANG Shijing1
(1. School of Civil Engineering，Lanzhou University of Technology，Lanzhou，Gansu 730050，China；
2. Department of Architectural Engineering，Logistical Engineering University of PLA，Chongqing 401311，China)
Abstract：The in-situ soaking tests on loess collapsibility upon deadweight with the thickness greater than 36.6 m were carried out including a deep layer soaking test on a foundation treated with compaction piles of different lengths，a soaking test on a foundation treated with the deep dynamic compaction inside holes and a soaking test on a foundation buried with TDR moisture meters without water injection holes. The significant foundation subsidence occurred due to deep soaking when the thick deadweight collapsible loess foundation was treated 6 to 12 m in depths upon. When the depths of treatment were from 15 to 20 m，the ground settlement upon deep soaking was small. When the treatment depth was more than 20 m，the settlements of the foundation can be ignored. When the water pit of soaking test was 22.5 to 25.0 m in depth，the soil moisture content increased rapidly and even reached saturation，while if the water pit was deeper，the moisture content increased slowly with little collapse of loess. So 22.5 to 25 m can be viewed as the critical depth of foundation treatment and collapsibility evaluation for thick deadweight collapsible loess. The collapsibility in different regions and soil microstructures should be evaluated adopting different coefficients of collapsibility.
杨校辉1，黄雪峰1，2，朱彦鹏1，姚志华2，张世径1. 大厚度自重湿陷性黄土地基处理深度和湿陷性评价试验研究[J]. 岩石力学与工程学报, 2014, 33(05): 1063-1074.
YANG Xiaohui1，HUANG Xuefeng1，2，ZHU Yanpeng1，YAO Zhihua2，ZHANG Shijing1. EXPERIMENTAL STUDY ON COLLAPSIBILITY EVALUATION AND TREATMENT DEPTHS OF COLLAPSIBLE LOESS UPON SELF WEIGHT WITH THICK DEPTH. , 2014, 33(05): 1063-1074.
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2014, Vol. 33 
