龙滩水电站地下厂房区岩体应力场的试验研究

龙滩水电站左岸地下厂房，因工程地质条件复杂，为掌握地下建筑物施工及运行中的岩体应力状态，先后采用单孔全应力解除法及水压致裂法，对地下厂房区原岩应力场进行试验研究工作，本文重点介绍采用单孔全应力解除法进行的岩体应力量测原理、过程及成果分析，并与之相关的建议地下厂房设计的最佳方向。

Tests and Studies of the Rock Mass Stress Field of the Undefground Powerhouse Area of Longtan Hydropower Station

Longtan hydropower station has a underground powerhouse on the left bank.The engineering geological condition is complex. In order to understand the stress state inrock mass of the substructues during construction and operation,the natural stress state inrocks was measured and analy 2ed using stress relief method(sigle-hole whole stress reliefmethod)and Hydraulic Fracturing Method.This paper mainly discussed the principle,pro-cess arid results analysis of the stress measurement using stress relief method and accordinglygave the best proposal direction of the underground powerhouse.