加筋高压旋喷墙锚复合支挡体系设计方法研究

引用文献:

黄香春 赵仕兴 罗永忠 余德彬 许星 谭晓岗 袁勇 周巧玲. 加筋高压旋喷墙锚复合支挡体系设计方法研究[J]. 建筑结构,2023,48(07):130-136,142.

HUANG Xiangchun ZHAO Shixing LUO Yongzhong YU Debin XU Xing TAN Xiaogang YUAN Yong ZHOU Qiaoling. Study on design method of reinforced high-pressure jet grouting anchorage wall compound retaining system[J]. Building Structure,2023,48(07):130-136,142.

作者:黄香春 赵仕兴 罗永忠 余德彬 许星 谭晓岗 袁勇 周巧玲
单位:四川省川建勘察设计院有限公司 四川省建筑设计研究院有限公司 四川省建筑设计研究院有限公司复杂结构设计研究中心 建华建材四川)有限公司
摘要:简要概述了加筋水泥土支护结构的研究现状及不足,结合碎石类土场地中加筋水泥土桩的成桩工艺,基于土压力拱理论,提出了非咬合的分散式加筋高压旋喷桩布置方式。介绍了加筋高压旋喷墙锚复合支挡体系的结构形式、组成构件和构件的设置方式,阐述了该支挡体系设计计算的基本假定,建立了该支挡体系的力学模型;提出了基于等刚度原则的分散布桩墙体与实心墙体的转换方法。基于静力平衡原理,提出了悬臂墙+桩锚力学模型的抗倾覆、抗滑移整体稳定性分析方法;在基本假定的基础上,提出了墙体内力转化为桩轴力的方法,并给出了强度验算的方法。最后,通过重庆市某深基坑的项目应用,验证了加筋高压旋喷墙锚复合支挡体系及其计算方法的可行性。
关键词:加筋旋喷;高压旋喷;水泥土墙;悬臂墙;桩锚;等刚度代换;支挡体系;
作者简介:黄香春,硕士,正高级工程师,注册土木工程师(岩土),主要从事岩土、结构方法融合研究,Email:sccdhxc@163.com。赵仕兴,硕士,教授级高级工程师,一级注册结构工程师,英国注册结构工程师,主要从事高层建筑结构、复杂结构的设计与研究,Email:316458931@qq.com。
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Study on design method of reinforced high-pressure jet grouting anchorage wall compound retaining system
HUANG Xiangchun ZHAO Shixing LUO Yongzhong YU Debin XU Xing TAN Xiaogang YUAN Yong ZHOU Qiaoling
(Sichuan Chuanjian Geotecnical Survey Design Institute Co., Ltd. Sichuan Provincial Architectural Design and Research Institute Co.,Ltd. Complex Structure Design and Research Center,Sichuan Provincial Architectural Design and Research Institute Co., Ltd. Jianhua Construction MATERIALS (SICHUAN) Co., Ltd.)
Abstract: The current research situation and shortcomings of reinforced cement-soil retaining structure were briefly summarized. Combined with the pile forming technology of reinforced cement-soil pile in gravel soil, and based on the theory of earth pressure arch, a non-occlusive distributed reinforced high-pressure jet grouting pile layout was put forward. The structural form, components, and the setting mode of each component of reinforced high-pressure jet grouting anchorage wall compound retaining system were introduced, the basic assumptions of design method of the retaining system was expounded, the mechanical model of the retaining system was established. Based on the principle of equal rigidity, a conversion method between the dispersed wall and the solid wall was put forward. Based on the principle of static equilibrium, a method for analyzing anti-overturning stability and anti-sliding stability of the cantilever wall and anchorage pile mechanical model was proposed; On the basis of the basic assumptions, the method of transforming the internal force of the wall into the axial force of the pile was proposed, and the method of strength checking computation was given. Finally, the feasibility of the reinforced high-pressure jet grouting anchorage wall compound retaining system and its calculation method were verified through the application of a deep foundation pit project in Chongqing city.
Keywords: reinforce jet; high-pressure jet; cement-soil wall; cantilever wall; anchorage pile; equal rigidity transform; retaining system
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