中国铁道科学2011，Vol.32Issue(3)：68-73,6.
客运专线机场路隧道下穿高架桥近接桩基施工位移控制技术
Adjacent Pile Foundation Construction Displacement Control Technology of Passenger Dedicated Line Jichang Road Tunnel Crossing under Viaducts
崔光耀 1王明年 1路军富 1刘金松2
作者信息
- 1. 西南交通大学,土木工程学院,四川,成都,610031
- 2. 中国中铁二院工程集团有限责任公司,四川,成都,610031
- 折叠
摘要
Abstract
Twelve viaduct pile foundations are located in the vicinity of Jichang road tunnel of Chengdu-Mianyang-Leshan passenger dedicated line across Lantian viaduct in Chengdu. With the example, the construction displacement control technology of adjacent pile foundations was studied. Firstly, according to the relevant specifications and research results of similar engineering, the settlement and horizontal displacement control standards of adjacent pile foundation of passenger dedicated line Jichang road tunnel were established. Secondly, aiming at the section of Jichang road tunnel across Lantian viaduct, the simulation calculation model was established. In accordance with the geological condition and the designed support parameters, the physical and mechanical parameters of calculation model were determined. Lastly, the process of adjacent pile foundation tunnel excavation was simulated by employing numerical method. The computational results show that the settlement and differential settlement values of twelve adjacent pile foundations are less than early-warning values, but the horizontal displacement values of twelve adjacent pile foundations are greater than the allowable values. Therefore, only adopting reinforcement measures can Jichang road tunnel carry on the construction. Thus, the reinforcement measure of installing isolation pile foundations at either side of the Jichang road tunnel is presented. The settlement and horizontal displacement values of twelve adjacent pile foundations are calculated after adopting pile foundation reinforcement measures. The results show that the settlement and differential settlement values of twelve adjacent pile foundations have decreased greatly. The horizontal displacement values of twelve adjacent pile foundations have also reduced extraordinarily and are less than early-warning values. So, Jichang road tunnel can carry on the construction smoothly.关键词
客运专线/隧道施工/下穿隧道/近接桩基/桩基位移/控制标准/加固措施Key words
Passenger dedicated line/ Tunnel construction/ Under-crossing tunnel/ Adjacent pile foundation/ Pile foundation displacement/ Control standard/ Reinforcement measure分类
交通工程引用本文复制引用
崔光耀,王明年,路军富,刘金松..客运专线机场路隧道下穿高架桥近接桩基施工位移控制技术[J].中国铁道科学,2011,32(3):68-73,6.
