某赛车场CFG桩复合软土地基不均匀沉降影响因素分析（论文）.pdf

· 155 · 某赛车场 CFG 桩复合软土地基不均匀沉降影响因素分析沈琳（1.同济大学建筑设计研究院（集团）有限公司，上海 200092；2.上海智慧交通安全驾驶工程技术研究中心，上海 200092）　　［摘　要］为了研究某CFG桩复合软土地基不均匀沉降影响因素。依托某赛道CFG桩复合软土地基典型案例，运用ANSYS有限元数值模拟软件，采用“五因素，三水平”正交试验方法研究CFG桩复合软土地基不均匀沉降影响因素。研究可得：（1）通过数值模拟可得，不同影响因素下复合软土地基不均匀沉降特性表现出一致性，软土复合地基上部位移均表现出“波浪形”不均匀沉降特性；（2 ）随着影响因素的变化，桩间距对复合软土地基的不均匀沉降特性更加明显，桩长、桩径与桩参数在控制复合软土地基中具有临界值；（3）CFG 桩复合软土地基不均匀沉降敏感性因素依次为：CFG 桩参数、CFG桩径、CFG桩长、CFG桩间距、褥垫层厚度。研究结果可为复合软土地基不均匀沉降控制提供理论指导。　　［关键词］复合软土地基；不均匀沉降；影响因素　　［中图分类号］ TU 758.11 　　　　［文献标志码］ A　　　　［文章编号］ 1001 -523X （2023 ）03-0155 -03 ANALYSIS ON INFLUENCING FACTORS OF UNEVEN SETTLEMENT OF CFG PILE COMPOSITE SOFT SOIL FOUNDATION IN A RACING TRACK Shen Lin 　　［Abstract ］ In order to study the influence factors of uneven settlement of a CFG pile composite soft soil foundation. In this paper, based on a typical case of CFG pile composite soft soil foundation of a race track, the inﬂuence factors of uneven settlement of CFG pile composite soft soil foundation are studied by using ANSYS ﬁnite element numerical simulation software and ''five factors, three levels '' orthogonal test method. The results show that: (1) through numerical simulation, the uneven settlement characteristics of composite soft soil foundation are consistent under diﬀerent inﬂuencing factors, and the position displacement on soft soil composite foundation shows the characteristic of ''wavy '' uneven settlement. (2) With the change of inﬂuencing factors, the uneven settlement characteristic of pile spacing on composite soft soil foundation becomes more obvious, and pile length, pile diameter and pile parameters have critical values in controlling composite soft soil foundation. (3) The sensitive factors of uneven settlement of CFG pile composite soft soil foundation are CFG pile parameters, CFG pile diameter, CFG pile length, CFG pile spacing and cushion thickness. The research results can provide theoretical guidance for the uneven settlement control of composite soft soil foundation. 　　［Keywords ］ composite soft soil foundation; uneven settlement; inﬂuencing factors 随着国家基础建设的推进，特殊地基的出现为处理地基技术提供了新的机遇和挑战，软土地基的设计和施工水平对工程质量起到了至关重要的作用 [1]。然而由于地下水赋存条件、地层分布特征复杂以及对地基处理方式的多样性，致使软土地基出现不均匀沉降现象。 1 工程概况武汉智能网联汽车测试场一期汽竞速区位于武汉经济技术开发区东荆河河畔，距长江约2 km，赛道规划用地面积约0.875 km 2，赛道对软土地基采用桩基加固的

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