砂卵石地层非开挖顶管施工地表沉降控制研究
投稿时间:2022-02-22  修订日期:2022-04-12  点此下载全文
引用本文:温继伟,岳金帅,项天,等.砂卵石地层非开挖顶管施工地表沉降控制研究[J].钻探工程,2022,49(3):130-138.
WEN Jiwei,YUE Jinshuai,XIANG Tian,et al. Research on ground subsidence control in trenchless pipe jacking in sandy gravel formation[J]. Drilling Engineering, 2022,49(3):130-138.
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作者单位E-mail
温继伟 石家庄铁道大学土木工程学院河北 石家庄 050043
成都理工大学环境与土木工程学院四川 成都 610059 
wenjiwei@stdu.edu.cn 
岳金帅 成都理工大学环境与土木工程学院四川 成都 610059  
项天 成都理工大学环境与土木工程学院四川 成都 610059  
张营旭 中铁二院工程集团有限责任公司四川 成都 610031  
唐方杰 成都理工大学环境与土木工程学院四川 成都 610059  
张杰 成都理工大学环境与土木工程学院四川 成都 610059  
胡萍 成都理工大学环境与土木工程学院四川 成都 610059  
基金项目:国家自然科学基金项目“非开挖顶管管体仿生优化及减阻增效机理研究”(编号:42172348);2021年省级大学生创新创业训练计划项目“多功能非开挖顶管管体摩阻力测试实验平台研发与正交实验研究”(编号:S202110616015)
中文摘要:砂卵石地层具有地层结构松散、透水性高、粘聚力小、自稳能力差等特点,往往为工程施工带来许多难题。为了更好地研究砂卵石地层非开挖顶管施工时地表的沉降规律及相应的控制措施,以成都市华阳、万安、正兴片区雨污水管网W31-W32顶管段为研究对象,采用工法比较、数值模拟与现场实测相结合的方法,提出了适用于砂卵石地层地表沉降的控制措施。研究结果表明:在砂卵石地层中,采用袖阀管注浆加固管周土体与高压旋喷桩加固洞门的措施是合理有效的,加固后地表沉降量相较于未加固时降低了48.1%,洞门处的地表沉降量降低了51.1%,满足了地表沉降控制要求,验证了地层加固措施的效果,可为后续类似的非开挖顶管施工提供借鉴。
中文关键词:砂卵石地层  非开挖顶管施工  地表沉降控制  地层加固  袖阀管注浆
 
Research on ground subsidence control in trenchless pipe jacking in sandy gravel formation
Abstract:With the characteristics of loose structure, high water permeability, low cohesion and poor self-stability. sandy gravel formation often brings many problems to the field work. In order to better research the ground subsidence laws and corresponding control measures during trenchless pipe jacking in sandy gravel formation, this paper takes the pipe jacking section W31-W32 of the rainwater and sewage pipe network in the areas of Huayang, Wan’an and Zhengxing in Chengdu city as the research object, and puts forward the ground subsidence control measures suitable for sandy gravel formation by means of construction method comparison, numerical simulation and field measurement, The results show that in the sandy gravel formation, reinforcement of soil around the pipe by sleeve valve pipe grouting and reinforcement of the pile portal by high-pressure jet grouting are proper and effective with the ground subsidence after reinforcement reduced by 48.1% compared with that without reinforcement, and the surface subsidence at the portal reduced by 51.1%, meeting the requirements of ground subsidence control; which verifies the effectiveness of formation reinforcement measures. It can provide reference for subsequent similar pipe jacking in the future.
keywords:sandy gravel formation  trenchless pipe jacking  ground subsidence control  formation reinforcement  sleeve valve pipe grouting
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