Foundation pit post seepage control system construction method: Fid-Bau Portal

Foundation pit post seepage control system construction method

SHEN YUANHONG

The invention relates to a foundation pit post seepage control system construction method, and relates to the technical field of foundation pit engineering. The foundation pit post seepage control system construction method comprises the following steps of S1, completing pile-anchor supporting of a foundation pit and completing excavating; S2, performing high pressure jet grouting between adjacentprotection slope piles of one side, close to a riverway, of the foundation pit to form a jet grouting pile which is engaged with the protection slope piles, wherein the bottom elevation of the jet grouting pile is the same as those of the protection slope piles, and the top elevation of the jet grouting pile is higher than the highest water level of underground water; and S3, constructing an enclosed cut-off wall along the outline of the foundation pit on one side, close to one side of the foundation pit, of each protection slope pile, wherein the bottom surface of the cut-off wall is embedded into a rock layer, the top elevation of the cut-off wall close to one side of the riverway is higher than the bottom elevation of the corresponding protection slope pile, and the top elevation of the rest of the cut-off wall is higher than the highest water level elevation of the underground water; and sealing the gaps between each of the protection slope piles as well as each of the jet grouting piles and the cut-off wall close to one side of the riverway. The foundation pit post seepage control system construction method has the advantages of good impermeability and low influence on the foundation pit and surrounding buildings.

本发明涉及一种基坑后防渗体系施工方法，涉及基坑工程的技术领域，包括以下步骤：S1、基坑已做好桩锚支护，并开挖完成；S2、在基坑临河道的一侧于相邻护坡桩之间高压旋喷形成与护坡桩咬合的旋喷桩，旋喷桩的底面标高与护坡桩底面标高相同，旋喷桩的顶面标高高于地下水最高水位高度；S3、在护坡桩靠近基坑内部的一侧沿着基坑的轮廓施工围蔽的防渗墙，防渗墙的底面嵌入岩层，靠近河道一侧的防渗墙顶面标高高于护坡桩的底面标高，其余防渗墙顶面高于地下水最高水位标高；将护坡桩、旋喷桩与靠近河道一侧的防渗墙之间的间隙密封。本发明具有防渗性好、对基坑以及周围建筑影响小的优点。

Zugriff

Download

Seitennavigation

Dokumentinformationen

Ähnliche Titel

Exportieren, teilen und zitieren