黄土地区某深基坑工程降水试验研究.pdf

施工技术 2010年9月 78 CONSTRUCTION TECHNOLOGY 第39卷第9期 黄土地区某深基坑工程降水试验研究 武乾，赵浩，林源，胡长明 (西建筑科大学土木工程学院，陕西西容710055) [接]以地处湿性黄土地区的菜深基悦工程降水设计为背墨，基于降水试，采用“试算法”得出了舍的降水 设计参数，在此基上，运用“大并法”进行基悦降水设计，初步拟定了程降水方亲：利用非饱和土非穆定济流 理论，对建场区障水故果进行了数棋拟与分析，得到了基内外浴流扬在降水过程中的变化规律，为降水方意 的优化设计提供科学依据. [关键词]深基悦：降水设计：湿陪性黄土：地铁季站：数值横拟 [中分类导]TU753.1 [立献标识移]A[支章编]10028498(2010)09-0078-04 Experiment Research on Dewatering of a Deep Foundation Excavation in the Loess Region Wu Qian Zhao Hao Lin Yuan Hu Changming Civil Engineering College Xi'an University of Architecture and Technology Xi'an Shaanxi 710055 China) Abstract:With dewatering design of some deep foundation excavation engineering in the loess region basing on the dewatering test the authors get appropriate parameter by test method.On this basis they use Great Well Method to design the foundation excavation and draw up an initial dewatering scheme. Besides using the theory of unsaturated soil dewatering effects is simulated on the proposed site area and variation seepage inside and outside the foundation exeavation is obtained in the proeess of dewatering.As a result it provides simulated scientific basis for optimization design of dewatering scheme. Key words:deep foundation excavation:dewatering design:collapsibility loess:subway station:numerical simulation 1工程概况 春1土层物理力学参 某地铁车为地下4层岛式站台车站，标准段结 Table 1 Physical and mechanical properties of soil 构外包尺寸20.9m×24 46m(宽x高)，季落长度 选系 压像 度/ 盐聚力/内摩 土居 / 泊松比数/ 135.6m 基杭标准段宽度20.9m 盾构井段宽度为 m kPa角/(o) (m/d) (MPa-1) 28.2m 顶部覆土2...