土工基础

›› 2014, Vol. 28 ›› Issue (5): 102-105.

• 工程实录 • 上一篇    下一篇

隧道浅埋段的超前地质预报与监控量测

朱中全1,2   

  1. （1.南平市公路局,福建南平  353000；2.南平京台高速公路有限责任公司,福建南平  353000）
  • 收稿日期:2014-03-17 出版日期:2014-10-20 发布日期:2014-10-28
  • 作者简介:朱中全（1966-），男，高级工程师，研究方向为高速公路建设管理等。

Geological Prediction of Shallow Buried Tunnel Excavations and Monitoring

ZHU Zhongquan1,2   

  1. （1.Nanping Highway Bureau, Nanping 353000;2.Nanping Jingtai Expressway Co., Ltd, Nanping 353000）
  • Received:2014-03-17 Online:2014-10-20 Published:2014-10-28

摘要： 隧道超前地质预报与监控量测是新奥法施工不可缺少的一部分，能够准确预报掌子面前方一定距离内围岩质量的好坏，并实时通过围岩变形的监测与分析检验围岩是否稳定及支护是否合理。结合杉溪隧道工程实例，通过对隧道浅埋段的超前地质预报和监控量测数据进行分析研究，得出隧道浅埋段围岩变形速率受施工干扰影响较大，钢支撑内力及围岩压力与围岩断面变形量变化趋势基本一致。通过研究隧道浅埋段的围岩变形规律和支护结构受力特征，可为以后类似项目积累经验，提供施工依据。

关键词: 隧道, 监控量测, 超前地质预报, 塌方

Abstract: The advanced geological forecast and monitoring measurements of tunnels are indispensable parts of construction for the New Austrian Tunneling Method. These monitoring and measurements can accurately forecast the quality of the rock mass within a certain distance from the tunnel excavation face and provide realtime stability information of the tunnel wall and supporting structures. They can also provide the large deformation warning in the tunnel excavation and ensure the proper excavation procedure can be implemented. The excavation of the shallow buried Shanxi Tunnel is presented in this paper. Both the predicted and monitoring data during the tunnel excavation are analyzed. It is concluded that the deformation rate in the rock mass could be affected by the construction methods. The stresses within the steel supporting structures as well as within the rock mass are correlated with the deformation rate at the excavated surface in the shallow buried tunnel.

Key words: Tunnels, Monitoring and Measurements, Advanced Geological Forecast, Instabilities