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 12):160-163.
Case Study of Steel Pipe Jacking across River through the Hard-soft Heterogeneous Stratum
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
12 12
Page:
160-163
Column:
Date of publication:
2021-06-17
- 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 longdistance river through the hardsoft 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.
Last Update:
2021-06-17