最新轻轨与地铁论文.doc

轻轨与地铁论文
中国矿业大学力学与建筑工程学院?地铁与轻轨?课程报告 第 8 页
several group number, then with b ± a, =c,c is is methyl b two 极大地推动了地铁建设事业的快速开展。
1 明挖法施工
放坡开挖技术。
在工程地质及水文地质条件允许的情况下,可采用放坡开挖的施工技术。边坡坡度根据地质、基坑挖深及参照当地同类土体边坡稳定值确定。基坑的开挖尺寸要保证满足结构施工的需要, 需要设排水沟、集水井的基坑, 其开挖尺寸可适当加宽。基坑应自上而下分层、分段依次开挖, 以防止掏底开挖发生事故,开挖应随挖随刷边坡。
型钢支护技术。
型钢支护一般是使用打桩机或沉拔桩机打入或沉入工字钢或钢板桩, 根据不同地区和地质条件设定桩距,桩间采用木背板、水泥土或钢丝网喷混凝土挡护。当基坑较深时, 可采用双排桩, 由拉杆或连梁连接共同受力。地铁施工也可采用多层钢横撑支护技术, 还可用单层或多层锚杆, 使其与型钢共同形成边坡支护体系。
中国矿业大学力学与建筑工程学院?地铁与轻轨?课程报告 第 4 页
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measu