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(1 天津大學(xué)建筑工程學(xué)院，天津 300072； 2 天津城市建設(shè)學(xué)院土木工程系，天津 300384；

3 中水北方勘測(cè)設(shè)計(jì)研究有限責(zé)任公司，天津 300222)

［摘要］基于雙排樁支護(hù)結(jié)構(gòu)設(shè)計(jì)的基本理論、簡(jiǎn)化模型及內(nèi)力計(jì)算方法，用ANSYS有限元軟件建立平面應(yīng)變模型，對(duì)雙排樁支護(hù)結(jié)構(gòu)進(jìn)行分析與研究，討論前后排樁排距、樁身剛度等因素對(duì)圍護(hù)結(jié)構(gòu)側(cè)向位移及樁身內(nèi)力的影響。通過(guò)比較分析得出，前、后排樁與樁間土協(xié)同作用效果明顯，雙排支護(hù)樁結(jié)構(gòu)具有較大的側(cè)向剛度，可有效地限制圍護(hù)結(jié)構(gòu)的側(cè)向變形；排距對(duì)雙排樁支護(hù)結(jié)構(gòu)受力影響較大，當(dāng)排距為3～8倍樁徑時(shí)，前后排樁可較好地發(fā)揮抵抗側(cè)向變形的能力，合理選擇排距可獲得較好的支護(hù)效果。

［關(guān)鍵詞］雙排樁；支護(hù)結(jié)構(gòu)；受力分析；影響因素

Analysis on stressed deformation and affected factors of doublerow pile retaining structure

 Yang Dejian 1，2, Wang Tiecheng 1, Yin Jianfeng 3

(1 Col. of Civil Eng.， Tianjin Uni., Tianjin 300072, China; 2 Dep. of Civil Eng., Tianjin Ins. of Urban Construction, Tianjin 300384, China;

  3 China Water Resources Beifang Investigation Design and Research Co., Ltd., Tianjin 300222, China)

Abstract:A foundamental theory，simple model and stress analysis method for the double-line pile retaining structure design are introduced. The finite element process ANSYS is used to set up the model of double-row pile retaining. By analyzing the effects of the distance, pile rigidity, distance of piles and other factors on the deformation and bending moment of the structure are discussed. With the effective co-operation of double-line piles and soil, the double-line piles retaining structure can confine side direction deformation effectively, and the double-line pile retaining structure has strong lateral rigidity. The bearing performance of retaining structure is influenced by the distance of two lines of piles, and it is showed that the best distance is 3～8 times of the pile diameter.

Keywords:double-row pile；retaining structure；stressed analysis；affected factors

*天津市高等學(xué)?？萍及l(fā)展基金項(xiàng)目(2005xk1)。