CAJ | 학술논문

西安市辋川河引水李家河工程近期建成竣工并已开始蓄水. 拦河大坝为碾压砼抛物线双曲拱坝,最大坝高98.5 m, 坝体厚高比0.315, 是一座薄碾压砼高拱坝. 设计建基要求865 m高程以下微风化—新鲜Ⅱ类岩体, 865 m高程以上微—弱风化的中下部Ⅱ-Ⅲ类岩体. 相应要求弹性波速分别>4 000 m/s和3 600 m/s.坝址地形为中低山峡谷区, 河谷 "V" 字型发育, 较窄. 坝基岩性为燕山期侵入花岗岩, 构造不发育, 岩体坚硬, 完整性好. 但坝基岩体受风化、构造影响, 局部存在不良工程地质问题和地质缺陷, 不满足设计建基要求. 通过对建基面岩体的工程地质条件分析论证, 提出对不满足建基要求的岩体进行挖除换填、锚固、灌浆等工程处理措施, 处理后达到建基岩体要求.
서안시망천하인수리가하공정근기건성준공병이개시축수. 란하대패위년압동포물선쌍곡공패,최대패고98.5 m, 패체후고비0.315, 시일좌박년압동고공패. 설계건기요구865 m고정이하미풍화—신선Ⅱ류암체, 865 m고정이상미—약풍화적중하부Ⅱ-Ⅲ류암체. 상응요구탄성파속분별>4 000 m/s화3 600 m/s.패지지형위중저산협곡구, 하곡 "V" 자형발육, 교착. 패기암성위연산기침입화강암, 구조불발육, 암체견경, 완정성호. 단패기암체수풍화、 구조영향, 국부존재불량공정지질문제화지질결함, 불만족설계건기요구. 통과대건기면암체적공정지질조건분석론증, 제출대불만족건기요구적암체진행알제환전、 묘고、 관장등공정처리조시, 처리후체도건기암체요구.
Lijiahe reservoir dam in Xi'an Wangchuan river which designed by Shannxi institute of water resources and e-lectric power investigation and design was completed and started to store water .The dam is a parabola hyperbolic arch dam with 98.5m height and 0.315 thickness ratio.The foundation should be on the rock which had the breeze to freshⅡquality following the 865m,and which had the breeze to weak weathering above the 865m,and correspond to which ,the elastic wave velocity should be more than 4 000 m/s and 3600m/s.The terrain is low mountain and canyon which was"V" type and narrow .The dam bedrock of Yanshan period is the intrusive granite ,the structure is not developed ,the rock mass is hard and the integrity is good .However with the excavation of dam foundation rock under influence of weathering and tectonic ,local existence of poor engineering geological problem and geological defects , which can not meet the re-quirements of foundation .Through the analysis on the engineering geological condition of the dam foundation , measures such as filling ,anchoring ,and grouting on the rock which was not meet the requirements of foundation is proposed in or -der to meet the the foundation requirement .