- 摘 要
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（1青島騰遠(yuǎn)設(shè)計(jì)事務(wù)所有限公司， 青島 266100; 2 青島市建設(shè)工程施工圖設(shè)計(jì)審查有限公司， 青島 266100）
［摘要］泰安某商業(yè)綜合體項(xiàng)目筏板基礎(chǔ)底落于粉質(zhì)黏土層，經(jīng)承載力修正后，地基承載力基本滿足設(shè)計(jì)要求，但沉降過大，超出規(guī)范限值要求，對于這種情況，基礎(chǔ)結(jié)構(gòu)設(shè)計(jì)首先考慮了減沉樁方案。該項(xiàng)目減沉樁方案的特殊性在于要同時(shí)考慮抗壓及抗浮工況下的樁設(shè)計(jì)和樁端落于強(qiáng)風(fēng)化泥巖較硬土層時(shí)減沉樁的適用性。通過有限元方法模擬，分工況計(jì)算分析了樁和樁間土的承載力及沉降的變化情況，驗(yàn)證了各工況下以強(qiáng)風(fēng)化泥巖層為持力層時(shí)，減沉樁筏基礎(chǔ)沉降可以得到有效控制，且承載力等指標(biāo)均能滿足規(guī)范要求。
［關(guān)鍵詞］減沉樁； 軟土地基； 復(fù)合地基； 樁筏基礎(chǔ)； 樁土共同作用
中圖分類號(hào)：TU443文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)17-0109-07
Design and application of settlement reducing pile in pile raft foundation on shallow soft soil ground
XIAO Yan1, JIANG Yongguang1, JING Yanqing1, LI Jianfeng1, FU Shourong1, WANG Yang1, REN Guangrui2
（1 Qingdao Teng Yuan Design Institute Co., Ltd., Qingdao 266100, China; 2 Qingdao Construction Engineering Construction Drawing Design Review Co., Ltd.， Qingdao 266100, China）
Abstract:In a commercial complex project in Tai′an, the raft foundation bottom fell on the silty clay layer. After the bearing capacity correction, the bearing capacity of the foundation basically met the design requirements, but the settlement was too large and exceeded the specification requirements. For this case, the settlement reducing pile scheme was first considered in the foundation structural design. The particularity of the project was to consider the pile design under both compression and anti-floating conditions and the applicability of the pile when the pile end fell in the hard soil layer of strongly weathered mudstone. Through the finite element method simulation, the bearing capacity and settlement of the pile and the soil between the piles were calculated and analyzed according to the working conditions. It was verified that the settlement reducing pile raft foundation could be effectively controlled when the strongly weathered mudstone layer was taken as the bearing layer, and the bearing capacity and other indexes could meet the requirements of the specification.
Keywords:settlement reducing pile; soft soil ground; composite foundation; pile raft foundation; pile-soil interaction
作者簡介：肖艷，學(xué)士，高級(jí)工程師，一級(jí)注冊結(jié)構(gòu)工程師，Email: xiao.yan1@tengyuan.com.cn。
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