长沙冰雪世界矿坑生态修复边坡加固技术研究  

Study on Reinforcement of Mine Ecological Restoration Slope in Changsha Ice and Snow World Project

作　　者：李建新 何海涛 何昌杰 田湖南[3] 廖飞 LI Jianxin;HE Haitao;HE Changjie;TIAN Hu’nan;LIAO Fei(The 3rd Construction Co.,Ltd.of China Construction 5th Engineering Bureau,Changsha,Hunan 410004,China;China Construction 5th Engineering Bureau Co.,Ltd.,Changsha,Hunan 410004,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430000,China)

机构地区：[1]中建五局第三建设有限公司,湖南长沙410004 [2]中国建筑第五工程局有限公司,湖南长沙410004 [3]中国科学院武汉岩土力学研究所,湖北武汉430000

出　　处：《施工技术》2021年第2期10-14,共5页Construction Technology

基　　金：中建股份有限公司课题:百米深坑多功能复杂建筑绿色建造关键技术研究与应用(CSCEC-2016-Z-39)。

摘　　要：废弃矿坑的生态修复和开发再利用是国家绿色发展的战略目标。做好边坡加固是矿坑生态修复的关键。岩溶地区矿坑地质环境复杂多变,项目岩壁与建筑物关系复杂,边坡加固需要分区分段进行设计。工程场地内土质边坡加固分A,B,C 3区进行设计。A,B区采用预应力锚杆+全长粘结锚杆格构+面板支护,C区边坡上部采用放坡+锚杆支护,下部采用桩锚直立支护。岩质边坡采用预应力锚索、全长粘结锚杆+格构的加固形式。边坡开挖揭露的溶洞、溶沟、溶槽,清理填充物、清洗岩面后,采用C30混凝土或片石混凝土回填;人工填土及砂卵石层采用双管高压旋喷注浆进行加固。边坡范围以内的地表水进行尽快汇集和引出;边坡范围以外的地表水进行拦截和旁引。The ecological restoration and exploitation and reuse of abandoned mine is a strategic goal of national green development.Good slope reinforcement is the key of mine ecological restoration.The geological environment of the mine in Karst area is complex and changeable,and the relationship between the rock wall and the building is complex.The reinforcement of soil slope in the engineering site is divided into three zones A,B and C in design.Prestressed bolt and full-length bonded bolt lattice face and plate support is adopted in zones A and B.The upper part of the slope in zone C is supported by slope release plus bolt,and the lower part is supported by pile-anchor upright.The rock slope adopts the reinforcement form of prestressed anchor cable,full-length bonded anchor bolt and lattice structure.After the slope excavates the exposed Karst caves,dissolution trenches and dissolution grooves,the slope shall be backfilled with C30 concrete or schist concrete after the filling is cleared and the rock surface is cleaned.The artificial soil filling and sand pebble bed are reinforced by double pipe high pressure rotary jet grouting.The surface water within the slope area should be collected and extracted as soon as possible.Interception and bypass of surface water outside the slope area are developed.

关 键 词：矿坑 土质边坡 岩质边坡 加固 边坡支护 

分 类 号：TU753[建筑科学—建筑技术科学]