边坡俯倾孔液压流排水方法研究  

Hydraulic flow drainage method of inclined borehole

作　　者：孙红月[1] 帅飞翔 陈中轩 雷怡 葛琦 尚岳全[2] SUN Hongyue;SHUAI Feixiang;CHEN Zhongxuan;LEI Yi;GE Qi;SHANG Yuequan(Ocean College,Zhejiang University,Zhoushan 316000,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310000,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316000 [2]浙江大学建筑工程学院,浙江杭州310000

出　　处：《自然灾害学报》2021年第6期176-183,共8页Journal of Natural Disasters

基　　金：国家重点研发计划(2018YFC1504704);国家自然科学基金项目(41772276);浙江省公路管理局科技计划项目(2018H36)。

摘　　要：为突破边坡地下水无法从俯倾孔自然流出的物理限制,创建了俯倾孔液压流排水法。该方法利用边坡地下水位线与坡面地形线正相关的渗流场条件,通过注浆封闭俯倾孔的孔口段,在孔底的透水段中形成高于孔口的水头压力,利用地下水的压力差迫使孔内地下水通过排水管流出孔口,满足边坡实时排出地下水的需要。通过边坡渗流场分析,论证了俯倾孔液压流排水方法的可行性,模型试验展示了俯倾孔液压流排水方法的有效性及其排水发生过程。建设了首个边坡俯倾孔液压流排水法的应用示范工程,工程应用测试表明透水孔段内地下水的水头高度随着地下水的入渗而提高,当高于孔口高程时,孔内地下水不需要人为干预,就可以自动启动排水过程,直至孔内水排干,一次排水过程结束,验证了俯倾孔液压流排水法是一种有效的钻孔排水新方法,可望成为边坡工程排水的基本手段。In order to break through the physical limitation that the groundwater cannot flow out naturally from the inclined borehole,a hydraulic flow drainage method is established.In this method,the seepage field condition,that the groundwater level of the slope is positively related to the terrain line of the slope,is used.The water head pressure higher than the orifice is formed in the permeable hole section by grouting to seal the orifice section of the downdip borehole.Based on the pressure difference of groundwater,the groundwater in the hole is forced to flow out of the hole from the drainage pipe,thus the real-time drainage is realized.Through the analysis of slope seepage field,the feasibility of hydraulic flow drainage method is demonstrated.The model test showed the effectiveness of the method and the drainage process.The first application demonstration project of the drainage method for a slope is constructed.The application test showed that the head height of the groundwater in the permeable hole section increased with the infiltration of the groundwater.When the height of the groundwater head is higher than the height of the orifice,the groundwater in the hole can automatically start the drainage process without human intervention until the water in the hole is drained.It has been proven that the hydraulic flow drainage method is an effective new method of borehole drainage,which is expected to become the basic drainage methods of slope engineering.

关 键 词：边坡排水 俯倾孔 渗流场 模型试验 现场测试 

分 类 号：TU410[建筑科学—岩土工程] P694[建筑科学—土工工程]