Study on Deformation Control Value for Urban Rail Transit Foundation Pit Project

Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 9

Abstract

Objective Setting deformation control values for the monitored project and controlling the construction safety is a very important task in the construction of urban rail transit engineering, aiming to ensure the stability of the structure itself and the surrounding environment during construction. When the open-cut method is adopted, the deformation control values vary significantly with different geological conditions, and further clarification is needed on the mentioned values for foundation pits under different geological conditions. Method In the case study of a Beijing metro foundation pit project, the monitored data of the project are collected respectively from two areas (west, middle east) and then processed. The selected monitoring items include the ground settlement of foundation pit, the settlement and the horizontal displacement of the retaining pile top and wall top, the horizontal displacement of the retaining pile body and wall. Statistical analysis method is used to conduct in-depth study on the control values of the above four types of monitoring items, and on the relationship between the deformation value and the design depth H of foundation pit. Recommended control values of the four types of monitoring items are put forward for the foundation pits in two areas respectively. Result & Conclusion The recommended control values of the four types of monitoring items are as follows: 25~40 mm and 0.10%H~0.20%H, 15 mm, 25 mm, 25~40 mm and 0.10%H~0.20%H for foundation pits in the western area, and 30~50 mm and 0.15%H~0.30%H, 20 mm, 20 mm, 30~50 mm and 0.15%H~0.30%H for foundation pits in the middle east area.

Authors and Affiliations

Changjun SUN, Haisheng YAN, Tao GUO, Zhitao ZHAO, Mingming TANG, Qiaorong ZHONG

Keywords

Related Articles

Simulation and Optimization of Metro Train Braking Rate under the Timing Condition

[Objective] With the proposal of a green and low-carbon development goal for urban rail transit in China, metro is facing a daily increasing pressure of energy saving and emission reduction. Since traction consumes the...

Study on Flow Plasticity and Permeability of Mixture Conditioned Muck for Metro Shield Tunnel in Water-rich Sand Stratum

[Objective] When tunnel boring machine advancing in the water-rich sand layer, problems such as high cutter torque, serious wear and spout of the screw conveyer can be easily generated. In order to ensure the safety of c...

Integrated Design of Station Electromechanical Equipment Monitoring System Based on Edge Control Logic

Objective The current urban rail transit management mode still predominantly manages lines as subjects, and the efficiency of networked management is not fully utilized. Enhancing the efficiency and effectiveness of urba...

Research on Shanghai Rail Transit Signaling System Evolution Scheme

Objective With the rapid development of urban rail transit, the operational volume of trains has significantly increased. The existing CBTC (communication-based train control) system can no longer meet the signaling syst...

Detection Method for Installation Effect of Switch Machine Movable/Static Contact Groups Based on Key Point Recognition

Objective Traditional methods for detecting the installation effect of SmMSC (switch machine movable/static contact) groups are slow, inaccurate, and susceptible to human errors. It is necessary to introduce a fast and h...

Download PDF file
  • EP ID EP744331
  • DOI 10.16037/j.1007-869x.2024.09.023
  • Views 77
  • Downloads 0

How To Cite

Changjun SUN, Haisheng YAN, Tao GUO, Zhitao ZHAO, Mingming TANG, Qiaorong ZHONG (2024). Study on Deformation Control Value for Urban Rail Transit Foundation Pit Project. Urban Mass Transit, 27(9), -. https://europub.co.uk/articles/-A-744331