陆定伟 刘春艳

摘 要：针对普宜水库黏工程所在地年平均降水日数多，土料场黏土料含水率过高引起施工难度大的问题，对黏土料采取松动土层翻晒、深沟排水等措施处理后，含水率依然偏高。对此，结合工程项目所在地的情况，采用掺砂的方式降低黏土料的含水率，有效解决了填筑过程中出现的“弹簧土”问题，对工程的按时完工起到了极大的作用。

关键词：土石坝;黏土斜墙;含水率;碾压;普宜水库

中图分类号：TU442文献标识码：A文章编号：1003-5168（2021）10-0054-03

Discussion on Water Content Control Method of Clay Filling Material for Inclined Wall of Puyi Reservoir Dam

LU Dingwei 1 LIU Chunyan2

（1.Guizhou Zhongcheng Tianhe Water Conservancy Engineering Co.， Ltd.，Guiyang Guizhou 550003;2.Guizhou University of Engineering Science，Bijie Guizhou 551700）

Abstract： In view of the problem that the average annual precipitation days of Puyi reservoir clay project are many and the water content of clay material is too high in the earth material yard， the water content of clay material is still high after taking measures such as turning over the loose soil layer and deep ditch drainage. In this regard， combined with the situation of the project location， the method of sand mixing is adopted to reduce the moisture content of clay materials， which effectively solves the problem of "spring soil" in the filling process， and plays a great role in the timely completion of the project.

Keywords： earth rock dam;clay inclined wall;water content;rolling;Puyi reservoir

七星关区普宜水库位于七星关区普宜镇箐脚村安家寨组境内箐脚小河沟中部，坝址距普宜乡政府1.5 km，距大方县城区61 km，距七星关区城区81 km，距省会贵阳市241 km，交通条件便利。本工程坝址以上集水面积0.55 km2，水库挡水建筑物为土石坝，最大坝高22.30 m，坝顶高程1 287.50 m，正常蓄水位1 286.00 m。工程等别为Ⅴ等，规模为小（2）型，普宜水库的主要任务是解决普宜镇规划镇区17 000人、1 700头大小牲畜的用水需水，年供水量13.81万m3。

1 大坝设计概述

工程挡水大坝为土石坝，最大坝高22.30 m，坝顶宽5.0 m，坝轴线长83.00 m，坝顶高程1 287.50 m，防浪墙顶高程1 288.50 m，河床建基面高程1 265.20 m，上游坝坡1∶2.25，下游坝坡为1∶2.0。筑坝材料为料场及建筑物地基开挖的黏性土、无黏性土、残坡积土、砂砾及风化料、不含腐殖土及有机土。坝体上游面采用复合土工膜+坝基帷幕灌浆防渗+黏土斜墙防渗，按照填筑材料及功能从上游到下游将坝体分为上游保护层、土工膜上垫层、防渗复合土工膜、下垫层、黏土斜墙、风化料填筑体、下游护坡及排水棱体[1]。……