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 (湖南大學(xué)建筑安全與節(jié)能教育部重點(diǎn)實(shí)驗(yàn)室， 長(zhǎng)沙410082)

［摘要］以長(zhǎng)沙五一廣場(chǎng)地鐵車(chē)站基坑為例，采用均勻設(shè)計(jì)法與有限元模擬相結(jié)合，以不同施工階段的坑外實(shí)測(cè)沉降值為檢驗(yàn)指標(biāo)，在經(jīng)驗(yàn)范圍內(nèi)反演分析土體的彈性模量，并根據(jù)反演結(jié)果預(yù)測(cè)基坑外的最終沉降值。結(jié)果表明，采用均勻設(shè)計(jì)法可以減少試驗(yàn)次數(shù)，反演分析得到的土體彈性模量值明顯優(yōu)于按經(jīng)驗(yàn)區(qū)間的取值，由此可見(jiàn),將均勻設(shè)計(jì)理論、有限元模擬試驗(yàn)、實(shí)測(cè)數(shù)據(jù)相結(jié)合應(yīng)用于基坑土體彈性模量的反演和基坑周邊的沉降預(yù)測(cè)是簡(jiǎn)單、易行的。

［關(guān)鍵詞］均勻設(shè)計(jì); 反演分析; 土體彈性模量; 基坑; 沉降預(yù)測(cè); 有限元

中圖分類(lèi)號(hào)：TU473，TV551.4+2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2014)03-0084-06

Back analysis on soil parameters and forecast on settlement of foundation pit based on uniform design method

Wu Zhaoyang, Li Zhengnong, Zhong Min

(Key Laboratory of Building Safety and Efficiency of the Ministry of Education, Hunan University, Changsha 410082, China)

Abstract: Based on the foundation pit design of Wuyi Square subway station in Changsha, the elasticity modulus of soil was back analyzed in empirical range by combining uniform design method with finite element analysis method, in which the monitoring settlement outside the foundation pit in different construction stages were used as inspection indexes and the final settlements outside the foundation pit were forecasted according to back analysis results. Results show that by using uniform design method, the number of tests can be reduced and the elasticity modulus of soil is much more rational than those from empirical range. The combination application of uniform design method, finite element analysis test and monitoring data is easy to operate in back analysis of the elasticity modulus of foundation pit soil and settlement forecast of soil near the foundation pit.

Keywords: uniform design; back analysis; elasticity modulus of soil; foundation pit; settlement forecast; finite element

作者簡(jiǎn)介：吳朝陽(yáng)，博士研究生，工程師，Email: sun4652@sina.com。

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