Epitaxial supporting system of foundation pit support: Fid-Bau Portal

Epitaxial supporting system of foundation pit support

FENG KEJUN / FENG DENGLIANG / FENG BAOMIN / HU LEILEI

In the construction process of a foundation pit enclosure dam body, outer ring enclosure piles are arranged on the periphery of the foundation pit enclosure dam body, supporting rods are obliquely arranged on the tops of the outer ring enclosure piles correspondingly and are anchored, and the other ends of the supporting rods are anchored to cement ball bases; and enclosure top plates are arranged on the inner ring enclosing purlins and the outer ring enclosing purlins in the enclosure dam body. By arranging the outer ring fender posts, the supporting points of the foundation pit fender dam body are moved outwards, so that the supporting rods are developed in the depth direction of the foundation pit under the condition that the supporting inclination angle is not changed, the space proportion of the supporting rods in the foundation pit is reduced, and the supporting stability of the foundation pit is improved while the supporting stability of the foundation pit is improved. The supporting rods are arranged below the enclosure dam body and the bottom plane of the foundation pit in a hidden mode to the maximum extent, the influence on foundation pit excavation and structural construction is reduced, and the requirement for supporting the foundation pit enclosure of the deep foundation pit by the inclined support is met.

本发明公开了一种基坑围护的外延式支撑体系，本发明在基坑围护坝体的施工过程中，在基坑围护坝体的外围设置外圈围护桩，在外圈围护桩的顶部分别倾斜设置支撑杆并锚接、支撑杆另一端与水泥球基座锚固；在围护坝体内的内圈围檩及外圈围檩上设置围护顶板。本发明通过设置外圈围护桩，将基坑围护坝体的支撑点外移，使支撑杆在支撑的倾角不变的情况下，向基坑的纵深方向发展，以减少支撑杆在基坑内的空间占比，在解决基坑围护的稳定性的同时，最大限度地将支撑杆隐藏设置在围护坝体及基坑底平面的下方，减少对基坑开挖及结构施工的影响，满足了斜支撑对深基坑的基坑围护的支撑。

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