复杂环境下受煤坑基坑复合土钉墙支护施工

Composite Soil-nailed Wall Retaining Construction for the Coal-storing Pit in Complex Environment

摘要:

对于周边环境极其复杂的受煤基坑，设计与施工方案是否合理，关系到正常的生产、安全以及后期的维修工程。为了提高支护效果，避免多次反复维修，结合平顶山八矿支护工程，采用桩锚支护、土钉墙挂网喷砼支护、预应力土钉加固联合支护的方案，取得了良好效果。信息化施工方法的观测表明，基坑水平位移及其周围建筑物的沉降量都在安全范围，保证了基坑和周边建筑物的安全。

Abstract:

For the coal-storing pit surrounded by extremely complex environments, the design scheme is related to the normal production, safety and late maintenance works. In order to improve the supporting effect and avoid repeated maintenance, combined support with original supporting by the 8th Coal Mine of Pingdingshan, pile-anchor, soil-nailed meshing-concrete spraying and pre-stressed soil-nailing reinforcement was adopted with good effect. Based on the observation by information-construction method, the horizontal displacement of foundation pit and the settlement of the surrounding buildings are in a safe range, the safety of the foundation pit and the surrounding buildings were ensured.