884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(同濟大學(xué)建筑工程系，上海 200092)

［摘要］利用結(jié)構(gòu)試驗和有限元法分析嵌巖地下連續(xù)墻的承載能力，指出支護體系自重和基巖嵌固作用可以提高地下連續(xù)墻正截面的承載能力，據(jù)此提出地下連續(xù)墻正截面設(shè)計的新方法，在保證開挖安全的前提下減少了墻體配筋量并提高了墻身嵌巖截面的塑性轉(zhuǎn)動能力。最后對施工現(xiàn)場實測的地下連續(xù)墻變形數(shù)據(jù)進行反分析，得到了墻體鋼筋和混凝土應(yīng)力，進一步驗證了設(shè)計的合理性。

［關(guān)鍵詞］嵌巖地下連續(xù)墻；結(jié)構(gòu)試驗；有限元；設(shè)計方法；監(jiān)測

Mechanical analysis and discussion on design method of rock-socketed diaphragm

 Li Shaohui, Xu Wei

 (Building Engineering Department, Tongji University, Shanghai 200092, China)

Abstract:Based on the experiment and FEM analysis on load-bearing capacity of diaphragm, new design method of normal section is presented in which the gravity of support system and restraint function of bedrock are considered. Compared with traditional method, the rebar ratio of diaphragm decreases obviously and plastic rotation of diaphragm section near bedrock is guaranteed. During excavation of the pit, observation system is applied and the measured displacements are used in back analysis, so the stress of rebar and concrete of diaphragm are calculated to confirm the design.

Keywords:rock-socketed diaphragm; structural experiment; FEM; design method; observation