山岭隧道工程综合地质勘察方法探讨

山岭隧道工程具有隐蔽性、施工复杂性、地层条件和周围环境不确定性等特点,采用科学的勘察方法,是查明隧道岩土体工程地质条件的有效手段。本文以海淀区西山隧道为依托,针对隧道工程勘察中的关键地质问题,运用工程地质测绘、钻探、工程物探、水文地质勘查等综合勘察方法,有效地查明隧址区的地质构造、岩土体结构和地下水分布特征,全面、客观地评价隧道进出口段边坡及仰坡稳定性、隧道围岩质量与稳定性、隧道涌水量、地应力及有害气体等工程地质问题,并针对不良地质现象提出防治对策,以期为工期紧张、地形困难且日趋增多的山岭隧道工程地质勘察,提供可以借鉴的模式和方法。

The Discussion on the Comprehensive Geological Investigation Methods of Mountain Tunnel Engineering

Mountain tunnel engineering has these characteristics of concealment, complexity of the construction, uncertainty of formation conditions and the surrounding environment. By adopting the method of scientific investigation, it is to find out an effective method for tunnel engineering geological conditions in geotechnical engineering. This paper takes Xishan tunnel engineering of Haidian district as a investigation object, and uses the comprehensive investigation methods such as engineering geological surveying and mapping, drilling, engineering geophysical exploration, hydrogeological exploration, which can effectively find out the tunnel site area of the geological structure, rock mass structure and the distribution features of groundwater, comprehensively and objectively evaluate the stability of import-export slope and upward slope of the tunnel, quality and stability of surrounding rock and tunnel water inlfow, ground stress and engineering geological problems of harmful gas, and puts forward countermeasures against bad geological phenomenon, in order to provide a reference engineering geological investigation model for increasing mountain tunnel of tense construction period and dififcult terrain.