Abstract
In modern urban subway construction, the construction of connecting passages between subway stations and their entrances/exits constitutes an engineering task characterized by high technical complexity and substantial risk factors. Particularly in zones with shallow overburden depth, the application of pipe jacking construction technology assumes critical importance. When pipe jacking machines traverse urban arterial roads, the associated risks become even more pronounced due to the intricate underground pipeline networks and intensive traffic flow. This study selects the pipe jacking construction project for ancillary structures at Chisha Station as its research subject, conducting an in-depth analysis of the safe undercrossing of busy urban arterial roads under shallow burial conditions utilizing a rectangular earth pressure balance pipe jacking machine. The paper not only elaborates on pre-construction preparatory work in detail, but also meticulously expounds the key technical points of supervision and control during construction, encompassing precise regulation of jacking speed, rational management of excavated soil volume, ensuring grouting pressure stability, and real-time monitoring of the construction environment, among other critical aspects. Through systematic recording and analysis of these key parameters, this paper aims to provide comprehensive reference and guidance for future projects encountering similar construction challenges, thereby mitigating risks and enhancing construction efficiency and safety.
Full Text
Preamble
Summary of Construction Technology for Earth Pressure Balanced Rectangular Pipe Jacking Under Urban Arterial Roads Under Shallow Overburden Conditions
Chen Longwen, Zhang Yang, Hou Jinxiong, Li Jiahao, Chen Jun'an, Li Keyou
Guangzhou Metro Engineering Consulting Co., Ltd., Guangzhou, Guangdong 510000
Abstract
In modern urban subway construction, the construction of connecting passages between subway stations and entrances/exits represents a technically demanding and high-risk engineering task. This is particularly true in areas with shallow overburden depth, where the application of pipe jacking construction technology becomes especially critical. When a pipe jacking machine traverses beneath urban arterial roads, the risks are further magnified due to the complex underground utility networks and dense traffic flow above.
This paper selects the pipe jacking construction project for the ancillary structures of Chisha Station as a case study, providing an in-depth analysis of the safe undercrossing of busy urban arterial roads using a rectangular earth pressure balanced pipe jacking machine under shallow burial conditions. The article not only details the preparatory work before construction but also elaborates on the key technical points of supervision and control during the construction process. These include precise control of jacking speed, rational management of soil removal volume, ensuring the stability of grouting pressure, and real-time monitoring of the construction environment.
Through the recording and analysis of these critical parameters, this study aims to provide comprehensive reference and guidance for future projects that may encounter similar construction challenges, thereby reducing risks and improving construction efficiency and safety.
Keywords: shallow burial; rectangular earth pressure balanced pipe jacking; urban arterial road; supervision and control; parameter analysis