满足长时水化反应的孔压加载装置研制与应用  

Design and application of a pore water pressure loading device for long-term hydration reactions

作　　者：张志 张朝鹏 楼晨笛 刘洋 张茹[1] 吕游 凌淇淞 尹荣杰 ZHANG Zhi;ZHANG Zhaopeng;LOU Chendi;LIU Yang;ZHANG Ru;LYU You;LING Qisong;YIN Rongjie(College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China;Key Laboratory of Deep Earth Science and Engineering,Ministry of Education,Sichuan University,Chengdu 610065,China;Institute for Disaster Management and Reconstruction,Sichuan University,Chengdu 610207,China)

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]四川大学深地科学与工程教育部重点实验室,四川成都610065 [3]四川大学灾后重建与管理学院,四川成都610207

出　　处：《实验技术与管理》2024年第12期151-155,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目(U23B20146);四川省自然科学基金项目(2022NSFSC0005);四川大学实验技术研究项目(SCU241037)。

摘　　要：针对孔压加载装置在长时加载过程中稳定性差、孔压波动难以控制等问题,该文研制了一种满足长时水化反应的孔压加载装置,实现岩石水化反应下的长时孔压加载。利用此装置模拟大理岩深部水环境状态,对大理岩试样进行长时孔压稳定加载,并记录孔压数据随时间的变化,结果表明长时加载过程中孔压稳定性较好,且经过处理的大理岩试样在断裂韧度上存在明显力学特性变化,真实还原了深部岩石水环境状态。说明该装置设计合理、有效,满足探索孔压长时作用下岩石力学特性变化的试验需求。[Objective]As underground space development progresses into deeper parts of the Earth,the geological conditions of rock formations become more complex.The change in the mechanical properties of rocks under pore water pressure has become a key focus in rock mechanics,particularly in deep underground projects such as resource extraction and tunnel construction.Pore water pressure testing is an important method for analyzing the effects of pore water pressure on rocks.However,traditional pore water pressure loading devices encounter challenges,especially in maintaining stability during long-term loading,leading to pressure fluctuations and decreases.Power outages can also result in pressure drops,which affects the accuracy and reliability of the experimental results.These issues have prevented indoor simulations from accurately replicating real deep rock water environments.Therefore,this study designed and developed a pore water pressure loading device that can simulate various water environments and ensure long-term rock hydration reactions.This development is crucial for understanding the mechanical changes in deep rocks under pore water pressure and ensuring the long-term safety and stability of underground projects.[Methods]The proposed pore water pressure loading device is designed to meet the requirements of long-term hydration reactions.The device consists of a symmetric structure,including the main body,inlet and outlet pipelines,and control valves.The structure is simple,reliable,and easy to operate.The pore water pressure loading process can be completed by rotating the control rods.Once the water pressure reaches the required level,the shut-off valves are adjusted to maintain the desired pressure for the test.Minor pressure deviations during long-term loading can be corrected by manually adjusting the control rods in real time,thus ensuring stable pore water pressure and accurately simulating rock water conditions.The device was used in conjunction with Sichuan University’s Deep High-Stress High-Permeab

关 键 词：岩石力学 孔隙水压力 长时加载装置 水化反应 

分 类 号：TU45[建筑科学—岩土工程]