摘要
在深厚淤泥质土中实施老旧管网改造,受到施工场地限制和地下现状管线复杂等因素影响,施工难度较大,目前尚无成熟的施工工艺。针对存在的问题,以巢湖市某初期雨水调蓄工程项目为例,采用混凝土倒挂井与高压旋喷桩相结合的方案,利用混凝土倒挂井强度高、适用条件广等优点,结合高压旋喷桩提高地基承载力和阻水的特性,实现新、旧市政管网顺利连通。结果表明,采用的施工工艺强度高、整体性好、对道路交通影响小,可有效保护现状地下管线。采用的施工工艺可较好应用于深厚淤泥质土中老旧管网改造项目中,并为同类工程提供借鉴、参考。
The reconstruction of old pipe network in deep muddy soil is difficult due to the constraints of construction site and the complexity of underground pipelines.At present,there is no mature construction technology.In view of the existing problems,taking an initial rainwater regulation and storage project in Chaohu as an example,the scheme of combining concrete inverted well with high-pressure jet grouting pile is adopted,taking advantage of the advantages of high strength and wide application conditions of concrete inverted well,combined with the characteristics of high-pressure jet grouting pile to improve the foundation bearing capacity and water resistance,so as to realize the smooth connection of new and old municipal pipe networks.The results show that the adopted construction technology has high strength,good integrity,little impact on road traffic,and can effectively protect the current underground pipeline.The construction technology adopted can be better applied to the reconstruction project of old pipe network in deep muddy soil,and provide reference for similar projects.
作者
张凡孟
王志进
朱庆波
ZHANG Fan-meng;WANG Zhi-jin;ZHU Qing-bo(Hefei Municipal Design&Research Institute Co.,Ltd.,Hefei 230041,China)
出处
《中国市政工程》
2022年第2期52-55,108,共5页
China Municipal Engineering
关键词
混凝土倒挂井
高压旋喷桩
止水帷幕
复合地基
淤泥质土
井壁内力分析
concrete inverted shaft
high pressure jet grouting pile
water stop curtain
composite foundation
muddy soil
internal force analysis of shaft lining
