(1 四川省川建勘察设计院有限公司, 成都 610095; 2 四川省建筑设计研究院有限公司,成都 610095; 3 四川省建筑设计研究院有限公司复杂结构设计研究中心, 成都 610095;4 建华建材 (四川) 有限公司, 广汉 618300)

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

中图分类号:TU46+3 文献标志码:A 文章编号:1002-848X(2023)07-0130-07

DOI:10. 19701 / j. jzjg. SADI2320

Study on design method of reinforced high-pressure jet grouting anchorage wall compound retaining system

HUANG Xiangchun1,2, ZHAO Shixing2,3, LUO Yongzhong1,2, YU Debin1,2,XU Xing4, TAN Xiaogang4, YUAN Yong2, ZHOU Qiaoling2,3

(1 Sichuan Chuanjian Geotecnical Survey Design Institute Co. , Ltd. , Chengdu 610095, China; 2 Sichuan ProvincialArchitectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China; 3 Complex Structure Design and Research Center,Sichuan Provincial Architectural Design and Research Institute Co. , Ltd. , Chengdu 610095, China; 4 Jianhua ConstructionMATERIALS (SICHUAN) Co. , Ltd. , Guanghan 618300, China)

Abstract:The current research situation and shortcomings of reinforced cement-soil retaining structure were brieflysummarized. Combined with the pile forming technology of reinforced cement-soil pile in gravel soil, and based on thetheory 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 anchoragewall compound retaining system were introduced, the basic assumptions of design method of the retaining system wasexpounded, the mechanical model of the retaining system was established. Based on the principle of equal rigidity, aconversion method between the dispersed wall and the solid wall was put forward. Based on the principle of staticequilibrium, a method for analyzing anti-overturning stability and anti-sliding stability of the cantilever wall and anchoragepile mechanical model was proposed; On the basis of the basic assumptions, the method of transforming the internal force ofthe 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 calculationmethod 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

第一作者: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.

[引用本文] 黄香春,赵仕兴,罗永忠,等. 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,2023,53(7):130-136,142. HUANG Xiangchun,ZHAO Shixing,LUO Yongzhong,et al. Study on design method of reinforced highpressure jet grouting anchorage wall compound retaining system[J]. Building Structure,2023,53(7):130-136,142.