土石方开挖及支护专项施工方案1目录第一章工程概况.....................................................................................................................2一、工程概况.......................................................................................................................2二、工程地质条件...............................................................................................................2第二章编制依据.....................................................................................................................3第三章施工总体布署.............................................................................................................4一、土方开挖施工工序.......................................................................................................4二、喷锚支护工程...............................................................................................................4第四章土方挖运工程.............................................................................................................4一、土方开挖量...................................................................................................................4二、土方开挖施工准备.......................................................................................................5三、土方开挖施工方法.......................................................................................................5第五章基坑支护工程.............................................................................................................8一、基坑支护方案的选择...................................................................................................8二、喷锚支护工程.............................................................................................................14第七章质量检验与监测.......................................................................................................16第八章安全生产与文明施工...............................................................................................17一、安全生产措施.............................................................................................................17二、文明施工措施.............................................................................................................18第九章基坑开挖及支护应急预案.......................................................................................18附图...........................................................................................................................................1土石方开挖及支护专项施工方案2第一章工程概况一、工程概况1、工程概况华能林芝水电开发基地项目拟建地点为林芝八一镇永久片区，海拔2980m，南粤大道北侧，防洪堤西侧，即八一镇2号桥头上游侧，尼洋河右岸。距离区域中心约4公里，与八一镇新区隔河相望，本标段项目为一期一批工程中多功能综合楼（9层）。多功能综合楼为一栋九层高层及两栋一层会议厅通过一层地下室连成一体，上部以防振逢脱开;总高度高层为42.050m,一层会议厅为8.450m；±0.00m标高相当于绝对高程2982.90m。基坑底板最低处为游泳池部位，底板表面标高为-9.6m，柱基深度为800mm，垫层厚度100mm，最深开挖为-10.5m，相当于绝对标高2972.40m。2、场区周边情况为了做到方案经济合理，并根据总包单位提供的现状构筑物的数据及现场踏勘，本工程的周边建（构）筑物情况总结如下：基坑东侧南侧、西侧距新建建筑物较远可采用缓放坡，而北侧则为建筑...
