软土地区嵌岩连续墙与非嵌岩连续墙支护性状对比分析

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Abstract More and more deep excavations have been constructed to meet the increasing demands of underground infrastructure. The supporting characteristic of rock-socketed diaphragm is different from that in soil due to the different strengths of the bearing layer. Based on the analysis of field data including diaphragm wall deflections，wall settlements and axial forces of struts，the following main findings are obtained. The diaphragm wall deflections using the intermediary weathered rock as bearing layer are larger than those using clay as bearing layer. The maximum lateral displacements of rock-socketed and non rock-socketed diaphragm walls are 0.20%He and 0.32%He，respectively. The diaphragm wall deflections decrease with increasing system stiffness，which is more obvious for the rock-socketed diaphragm. The settlement behind the diaphragm wall is large when the value of x/He is smaller than 2.0(primary influence zone)，but small while the value of x/He is larger than 2.0(secondary influence zone). The axial forces of the first and fourth struts of rock-socketed diaphragm wall are larger than those using clay as bearing layer. In addition，the total support axial force of rock-socketed diaphragm wall is larger 44.9% than that of clay-socketed diaphragm wall.

Key words： pile foundations rock-socketed diaphragm wall diaphragm wall deflections settlements axial forces

Received: 20 February 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I1/164

[1] 赵占厂，杨虹，谢永利. 金华大厦基坑工程支护系统的数值分析[J]. 岩石力学与工程学报，2004，23(7)：1 219–1 222.(ZHAO Zhanchang，YANG Hong，XIE Yongli. Numerical analysis of excavation support system of Jinhua building[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(7)：1 219–1 222.(in Chinese)) [2] 胡伟. 软土地层地铁车站深基坑开挖围护结构稳定性数值模拟分析[硕士学位论文][D]. 成都：西南交通大学，2005.(HU Wei. Numerical analysis of stability of retaining wall in deep excavation of the subway station in soft clay[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2005.(in Chinese)) [3] 刘继国，曾亚武. FLAC3D在深基坑开挖与支护数值模拟中的应用[J]. 岩土力学，2006，27(3)：505–508.(LIU Jiguo，ZENG Yawu. Application of FLAC3D to simulation of foundation excavation and support[J]. Rock and Soil Mechanics，2006，27(3)：505–508.(in Chinese)) [4] 马天文. 地铁南京站下穿南京铁路站场施工关键技术研究[硕士学位论文][D]. 上海：上海交通大学，2005.(MA Tianwen. A study on the key construction technology of the Nanjing subway station tunnel beneath a cluster of railway lines in the Nanjing Railway Station[M. S. Thesis][D]. Shanghai：Shanghai Jiaotong University，2005.(in Chinese)) [5] 刘国彬，黄院雄，侯学渊. 基坑工程下已运行地铁区间隧道上抬变形的控制研究和实践[J]. 岩石力学与工程学报，2001，20(3)：202–207.(LIU Guobin，HUANG Yuanxiong，HOU Xueyuan. The prediction and control of rebound deformation of the existed tunnels right under excavation[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(3)：202–207.(in Chinese)) [6] 戚科骏，王旭东，蒋刚，等. 临近地铁隧道的深基坑开挖分析[J].岩石力学与工程学报，2005，24(增2)：5 485–5 489.(QI Kejun，WANG Xudong，JIANG Gang，et al. Analysis of deep pit excavation adjacent to tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(Supp.2)：5 485–5 489.(in Chinese)) [7] 杨光华. 深基坑支护结构的实用计算方法及其应用[J]. 岩土力学，2004，25(12)：1 885–1 896.(YANG Guanghua. Practical calculation method of retaining structures for deep excavations and its application[J]. Rock and Soil Mechanics，2004，25(12)：1 885– 1 896.(in Chinese)) [8] 陆培炎. 横向荷载作用下土、墙结构共同作用的简化法[J]. 广东水电科技，1991，(1)：1–10.(LU Peiyan. A simplified analysis of pile-soil interaction under lateral loading[J]. Guangdong Water Resources Hydropower Science，1991，(1)：1–10.(in Chinese)) [9] PECK R B．Deep excavation and tunneling in soft ground[C]// Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering. Mexico：[s.n.]，1969：225–290． [10] CLOUGH G W，O?ROURKE T D．Construction induced movements of in situ walls[C]// Design and Performance of Earth Retaining Structures，Proceedings of a Specialty Conference at Cornell University. New York：ASCE，1990：439–470. [11] LONG M. Database for retaining wall and ground movements due to deep excavations[J]. Journal of Geotechnical and Geoenvironmental Engineering，2001，127(3)：203–224. [12] KARLSRUD K．Performance monitoring in deep supported excavations in soft clay[C]// Proceedings of the 4th International Geotechnical Seminar. Singapore：[s.n.]，1986：87–202． [13] OU C，HSIEH P G，CHOU D C．Characteristics of ground surface settlement during excavation[J]. Canadian Geotechnical Journal，1993，30(5)：758–767. [14] WONG I H，POH T Y，CHUAH H L. Performance of excavations for depressed expressway in Singapore[J]. Journal of Geotechnical and Geoenvironmental Engineering，1997，123(7)：617–625. [15] CARDER D R. Ground movements caused by different embedded retaining wall construction techniques[R]. [S.l.]：[s.n.]，1995. [16] FERNIE R，SUCKLING T. Simplified approach for estimating lateral movement of embedded walls in U K ground[C]// Proceedings of International Symposium on Geo Aspects of Underground Construction in Soft Ground，City University. London：[s.n.]，1996：131–136. [17] 王建华，徐中华，王卫东. 支护结构与主体地下结构相结合的深基坑变形特性分析[J]. 岩土工程学报，2007，29(12)：1 899–1 903. (WANG Jianhua，XU Zhonghua，WANG Weidong. Analysis of deformation behavior of deep excavations supported by permanent structure[J]. Chinese Journal of Geotechnical Engineering，2007，29(12)：1 899–1 903.(in Chinese)) [18] 宓群，赵建忠，蔡建荣. 嵌岩地下连续墙冲孔槽段施工新工艺[J]. 施工技术，2008，37(增)：144–146.(MI Qun，ZHAO Jianzhong，CAI Jianrong. New construction technology of punching groove segment in rock-socketed diaphragm wall[J]. Construction Technology，2008，37(Supp.)：144–146.(in Chinese)) [19] 劭晖，徐伟. 深基坑嵌岩支护技术应用研究[J]. 岩土工程学报，2006，28(增)：1 720–1 723.(LI Xunhui，XU Wei. Application of rock-socketed retaining structures for deep pits[J]. 2006，28(Supp.)：1 720–1 723.(in Chinese)) [20] YOO C. Behavior of braced and anchored walls in soils overlying rock[J]. Journal of Geotechnical and Geoenvironmental Engineering，2001，127：225–233. [21] LONG M. Database for retaining wall and ground movements due to deep excavations[J]. Journal of Geotechnical and Geoenvironmental Engineering，ASCE，2001，127(3)：203–224. [22] WANG J H.，XU Z H，WANG W D. Wall and groundmovements due to deep excavations in Shanghai soft soils[J]. Journal of Geotechnical and Geoenvironmental Engineering，2010，136(7)：985–994. [23] WONG K S，BROMS B B. Lateral wall deflections of braced excavations in clay[J]. Journal of Geotechnical and Engineering，115(6)：853–870. [24] CLOUGH G W，SMITH E M，SWEENEY B P. Movement control of excavation support systems by iterative design[C]// Current Principles and Practices，Foundation Engineering Congress，ASCE. Reston，Virginia：ASCE，1989：869–884. [25] HSIEH P G，OU C Y. Shape of ground surface settlement profiles caused by excavation[J]. Canadian Geotechnical Journal，1998，35(6)：1 004–1 017. [26] WANG Z W，CHARLES W W N，LIU G B. .Characteristics of wall deflections and ground surface settlements in Shanghai[J]. Canadian Geotechnical Journal，2005，42(5)：1 243–1 254. [27] MOORMANN C. Analysis of wall and ground movements due to deep excavations in soft soil based on a new worldwide database[J]. Soils and Foundations，2004，44(1)：87–98. [28] 徐中华. 上海地区支护结构与主体地下结构相结合的深基坑变形性状研究[博士学位论文][D]. 上海：上海交通大学，2007.(XU Zhonghua. Deformation behavior of deep excavations supported by permanent structure in Shanghai soft deposit[Ph. D. Thesis][D]. Shanghai：Shanghai Jiaotong University，2007.(in Chinese))