减小强蚀变花岗岩岩样扰动率的方法  

Methods to reduce the disturbance rate of strongly weathered granite rock samples

作　　者：乔帅 李爱国 QIAO Shuai;LI Aiguo(Changjiang Geotechnical Engineering Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]长江岩土工程有限公司,湖北武汉430010

出　　处：《水利建设与管理》2025年第2期32-34,68,共4页Water Conservancy Construction and Management

摘　　要：深圳市罗田水库-铁岗水库输水隧洞工程建筑物区的花岗岩岩体中随机分布有大量强蚀变岩,具有低强度、弱胶结、易崩解特征,是影响本工程超深大尺寸竖井、隧洞围岩稳定的控制性不良地质体。勘察过程中采集岩石原状样品进行相关物理力学试验非常困难,为满足深入研究强蚀变岩物理力学性质的需要,亟须减小强蚀变岩岩样采取扰动率。本工程采用了更换取芯钻具、改进采样装置、改变样品运输和制样方式的方法,在不延误工期、不增加成本的前提下,保证了强蚀变花岗岩物理力学指标的准确性。The Luotian Reservoir-Tiegang Reservoir water conveyance tunnel project in Shenzhen is located in a granite rock mass with a large number of strongly weathered rocks randomly distributed.These rocks exhibit low strength,weak cementation,and are prone to disintegration,making them a controlling unfavorable geological factor that affects the stability of the super-deep large-size vertical shafts and tunnel surrounding rocks.During the investigation,it was very difficult to collect in-situ rock samples for physical and mechanical testing.To facilitate in-depth research on the physical and mechanical properties of the strongly weathered rock,it was necessary to reduce the disturbance rate when collecting samples.This project adopted methods such as changing the core drilling tools,improving the sampling device,and modifying the sample transportation and preparation techniques.These approaches ensured the accuracy of the physical and mechanical parameters of the strongly weathered granite,without delaying the project schedule or increasing costs.

关 键 词：强蚀变花岗岩 岩样采样扰动率 物理力学参数 

分 类 号：TV221.2[水利工程—水工结构工程]