LIU Lin,LIU Yong,WANG Shu-ren.An Eliminating Method of Over-excavated Holes in Pipe-jacking Construction of Utility Tunnel with Rectangular Cross-section in Gravel Stratum[J].China Water & Wastewater,2021,37(10):154-159.
砂砾地层矩形截面管廊顶管施工超挖空洞消除方法
- Title:
- An Eliminating Method of Over-excavated Holes in Pipe-jacking Construction of Utility Tunnel with Rectangular Cross-section in Gravel Stratum
- Keywords:
- gravel stratum; utility tunnel; rectangular pipe jacking; over-excavated holes; soil modified mud
- 摘要:
- 包头市某矩形截面综合管廊需下穿市内某主干道，下穿段管廊位于复杂砂砾地层中，采用顶管法施工初期地下出现较大超挖空洞。在实地调查、分析施工参数基础上，采用原因关联分析方法找出土压表被砂石堵塞、减摩泥浆在土体中流失以及改良泥浆配合比不适用这三个主因。通过比选，采取为顶管设备增配全断面土压监测系统、采用注泥设备向管节外部注入浓泥稠浆形成不透水“泥壳”、调整膨润土泥浆配合比等应对措施，成功在后续顶进施工过程中消除了地下超挖空洞，现场顶管上方土体沉降观测结果均满足限定要求。
- Abstract:
- A rectangular cross-section utility tunnel which cross a main road in Baotou is located in a complex sand gravel stratum, and large underground over-excavated holes appear at the initial construction stage by pipe-jacking construction. Based on field investigation and analysis of construction parameters, three main reasons including the clogging of pressure gauge by sand gravel, the loss of anti-friction mud in soil and the inapplicability of modified mud mix ratio are found by means of cause correlation analysis. By comparison, corresponding measures are taken, such as adding whole section earth pressure monitoring system to the pipe jacking equipment, injecting thick mud into the external pipe sockets by mud injection equipment to form a impermeable “mud shell”, and adjusting the mix ratio of bentonite mud. The underground over-excavated holes have been eliminated in the subsequent pipe-jacking construction process successfully, and the field observation results of soil settlement have met the requirements.
相似文献/References:
[1]曹益宁,董永红.城市综合管廊入廊污水管道及重要节点的设计[J].中国给水排水,2018,34(20):67.
CAO Yi ning,DONG Yong hong.Design of Sewage Pipe and Important Nodes of Urban Utility Tunnel[J].China Water & Wastewater,2018,34(10):67.
[2]寇殿良,袁建平,陈雪梅.高压细水雾灭火系统在综合管廊中的应用[J].中国给水排水,2018,34(20):72.
KOU Dian liang,YUAN Jian ping,CHEN Xue mei.Application of High-pressure Water Mist Fire Extinguishing System in Utility Tunnel[J].China Water & Wastewater,2018,34(10):72.
[3]强健.综合管廊的功能区间及应用[J].中国给水排水,2020,36(18):45.
QIANG Jian.Functional Section in the Utility Tunnel and Its Application[J].China Water & Wastewater,2020,36(10):45.
[4]张晏晏,曹伟新,陆继诚,等.综合管廊超细干粉自动灭火系统设计探讨[J].中国给水排水,2020,36(22):136.
ZHANG Yan-yan,CAO Wei-xin,LU Ji-cheng,et al.Discussion on Design of Ultra-fine Dry Powder Automatic Fire Extinguishing System in Utility Tunnel[J].China Water & Wastewater,2020,36(10):136.
[5]唐兰,张月,王长祥.保障全周期本质安全的综合管廊规划编制方法及要求[J].中国给水排水,2020,36(24):60.
TANG Lan,ZHANG Yue,WANG Chang-xiang.Planning Compilation Methods and Technical Requirements for Utility Tunnel to Ensure Intrinsic Safety throughout the Life Cycle[J].China Water & Wastewater,2020,36(10):60.
[6]赫明水,王长祥,吕杨,等.城市综合管廊真空排水系统模型试验及设计技术研究[J].中国给水排水,2020,36(24):66.
HE Ming-shui,WANG Chang-xiang,L?Yang,et al.Research on Model Test and Design Technology about the Vacuum Drainage System of Utility Tunnel[J].China Water & Wastewater,2020,36(10):66.
[7]尚琳,刘远,何发龙,等.考虑人员安全疏散的综合管廊防火分区设计长度研究[J].中国给水排水,2020,36(24):72.
SHANG Lin,LIU Yuan,HE Fa-long,et al.Study on the Utility Tunnel Fire Compartment Design Length Considering Safe Evacuation[J].China Water & Wastewater,2020,36(10):72.
[8]许云骅,金善朝,徐浩煜.综合管廊运维目标、原则及新技术应用[J].中国给水排水,2021,37(8):53.
XU Yun-hua,JIN Shan-chao,XU Hao-yu.Targets, Principles and New Technologies Application of the Utility Tunnel Operation and Maintenance[J].China Water & Wastewater,2021,37(10):53.
[9]邓娟,郑爽.排水管道水力冲洗设施在综合管廊中的应用[J].中国给水排水,2021,37(8):101.
DENG Juan,ZHENG Shuang.Application of Drainage Pipe Hydraulic Flushing Facility in the Utility Tunnel[J].China Water & Wastewater,2021,37(10):101.
[10]赵忠梁.渠县黄花大道综合管廊通风设计[J].中国给水排水,2021,37(10):79.
ZHAO Zhong-liang.Design for Ventilation of Huanghua Avenue Utility Tunnel in Qu County[J].China Water & Wastewater,2021,37(10):79.