- 摘 要
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［摘要］根據(jù)應(yīng)力擴散理論，將錨拉樁后的土體分為應(yīng)力擴散影響區(qū)及非應(yīng)力影響區(qū)，進而將預應(yīng)力錨拉樁的土壓力傳遞方式分為兩部分：楔體內(nèi)的土壓力直接傳遞到錨頭，與錨頭間形成自平衡體系；楔體外的土壓力通過樁身結(jié)構(gòu)再傳遞到錨頭。利用靜力平衡方程，導出作用在樁上的土應(yīng)力強度，分析影響樁身土壓力分布規(guī)律的相關(guān)因素，并結(jié)合一工程案例的測試結(jié)果，與理論分析得到的成果進行對比分析，驗證提出的土壓力計算模式的正確性。
［關(guān)鍵詞］預應(yīng)力錨拉樁；土壓力計算模式；土楔體；擴散角；自平衡體系
中圖分類號：TU473文獻標識碼：A文章編號：1002-848X(2011)10-0102-03
Study on calculation mode of soil pressure for pre-stressed anchor piles
Li Chengfang1,2, Ye Xiaoming1, Xiong Qidong2, Li Xin2(1 College of Civil Engineering, Chongqing University, Chongqing 400010, China; 2 Chongqing Institute of Building Research, Chongqing 400015, China)
Abstract:According to the stress diffusion theory, the soil behind the anchor pile structure was divided into the stress diffusion affected area and non stress affected area. Then soil pressure transmission mode of the pre-stressed anchor pile was divided into two parts: soil pressure produced by wedge was directly transferred to the anchor head, the soil and the anchor head formed a self-balance system; other soil pressure through the anchor pile structure was passed to the anchor head. Using the static equilibrium equations, the soil pressure intensity exerted on pile was deduced and related influencing factors of its distribution were put forward. The theoretical analysis results were compared with the results of an engineering case test, and the correctness of the soil pressure calculation mode was demonstrated.
Keywords:pre-stressed anchor pile; soil pressure calculation mode; soil wedge; diffusion angle; self-balance system
作者簡介：李成芳，高級工程師，一級注冊結(jié)構(gòu)工程師，注冊土木（巖土）工程師，Email：LCF9133@163.com。
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