宁波柏坑水库重力坝坝基渗流及防渗措施研究  

Study on Seepage at Gravity Dam Foundation and Anti-seepage Measures of Ningbo Bokeng Reservoir

作　　者：唐宏进 朱昌杰 李雨坤 张发明[2] 侯晓岚[2] 王维平 Tang Hongjin;Zhu Changjie;Li Yukun;Zhang Faming;Hou Xiaolan;Wang Weiping(Ningbo Water Conservancy&Hydropower Planning and Design Institute Co.,Ltd.;School of Earth Sciences and Engineering,Hohai University)

机构地区：[1]宁波市水利水电规划设计研究院有限公司,浙江宁波315192 [2]河海大学地球科学与工程学院,南京市211100

出　　处：《勘察科学技术》2023年第4期35-40,共6页Site Investigation Science and Technology

基　　金：“十二五”国家科技支撑计划重点项目(2012BAB03B02);中央高校基本科研业务费(2019B60414)。

摘　　要：坝基渗流是影响大坝安全的重要因素。在复杂水文地质条件下,选择合理的控渗方案尤为重要。该文以宁波市柏坑水库扩容工程为例,在收集的坝址区地质资料的基础上,建立河床坝段坝基三维地质模型,通过三维有限单元法,模拟不同帷幕深度与排水孔是否失效等情况下的地下水流场分布,计算对应情况下的坝基渗流量与坝底扬压力,综合评价防渗措施的效果,为渗控方案的选择提供了重要依据。Seepage at the foundation of the dam is an important factor influencing dam safety.In the case of complex hydrogeological conditions,it becomes particularly important to select an applicable seepage control scheme.In this paper,taking the Ningbo Bokeng reservoir expansion project as an example,on the basis of geological data collected from the dam site area,a three-dimensional geological model of the dam base in the riverbed dam section is established.The groundwater flow field distributions under different curtain depths and whether the drainage holes fail are simulated through the three-dimensional finite element method.The seepage flow of the dam foundation and uplift pressure at the bottom of the dam under the corresponding conditions are calculated,and the effect of anti-seepage measures is comprehensively evaluated,which provides an important basis for the selection of seepage control schemes.

关 键 词：坝基渗流 防渗帷幕 三维有限元 渗透量 扬压力 

分 类 号：TV223.4[水利工程—水工结构工程] TV64