[1]杨仙,肖宇锋,崔杰平,等.穿越软硬不均地层的过河钢顶管施工案例分析[J].中国给水排水,2021,37(12):160-163.
　YANG Xian,XIAO Yu-feng,CUI Jie-ping,et al.Case Study of Steel Pipe Jacking across River through the Hard-soft Heterogeneous Stratum[J].China Water & Wastewater,2021,37(12):160-163.
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穿越软硬不均地层的过河钢顶管施工案例分析

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期数: 2021年第12期 页码: 160-163 栏目: 出版日期: 2021-06-17
Title:
Case Study of Steel Pipe Jacking across River through the Hard-soft Heterogeneous Stratum
作者:
杨仙1，肖宇锋1，崔杰平2，黎永索3
(1.湖南科技大学资源环境与安全工程学院，湖南湘潭411000；2.广州金土岩土工程技术有限公司，广东广州510000；3.湖南城市学院市政与测绘工程学院，湖南益阳413000)
Author(s):
YANG Xian1,XIAO Yu-feng1,CUI Jie-ping2,LI Yong-suo3
(1. College of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411000, China; 2. Guangzhou Jintu Geotechnical Engineering Technology Co. Ltd., Guangzhou 510000, China; 3. School of Municipal Engineering and Surveying and Mapping, Hunan City University, Yiyang 413000, China)
关键词:
钢顶管; 软硬不均地层; 河流穿越
Keywords:
steel pipe jacking; hard-soft heterogeneous stratum; across river
摘要:
以思科（广州）智慧城供水工程穿越沙湾水道段顶管工程施工为例，提出穿越软硬不均地层的长距离过河钢顶管施工过程中的重、难点主要为河水可能入侵掌子面造成涌水和坍塌、顶管轴线偏差大、顶进阻力大以及地层不均匀造成的结泥饼和滚刀偏磨等。对顶管机复合地层刀盘的二次碎岩原理、泥浆材料配合比及物理性质、方案设计及实际施工中继环数量及位置的确定、气压平衡换刀及清障的原理和技术等进行了详细说明。结合本工程特点，阐述了地质条件突变、机头偏转及轴线偏差过大等情况下的应急处理措施。本工程的顺利施工，可为类似穿越软硬不均地层的长距离过河顶管工程施工提供参考。
Abstract:
Taking the construction of water supply project of Cisco (Guangzhou) Wisdom City across Shawan waterway as an example, it is proposed that the key and difficult points in the steel pipe jacking construction across longdistance river through the hardsoft heterogeneous stratum include water gushing and collapse caused by water invasion into working face, great deviation of pipe jacking axis, large jacking resistance, slurry cake and eccentric wear of cutter caused by uneven stratum. The key problems in construction scheme such as the secondary rock breaking principle of pipe jacking cutter in composite formation, mix proportion and physical properties of slurry, number and position determination of relay ring in scheme design and actual construction, principle and technology of cutter change and obstacle removal by pneumatic balance are introduced. Combined with the characteristics of this project, the corresponding emergency processing measures in case of sudden change of strata conditions, head deflection and axis deviation are elaborated. The successful construction of this project has provided reference for similar pipe jacking construction across long-distance river through the hard-soft heterogeneous stratum.
更新日期/Last Update: 2021-06-17