Foundation pit external support structure

Abstract

The invention relates to a foundation pit external support structure, which comprises a retaining wall, wherein the top of the retaining wall is provided with an extending structure extending towardsthe outer side of a foundation pit; an anchoring device, wherein the upper end of the anchoring device is fixed on the extending structure; the lower end of the anchoring device is inserted into a soil body; and the included angle between the anchoring device and a horizontal plane is 60-90 degrees. The mode that the anchoring device is inserted with an included angle of 60-90 degrees with the horizontal plane can just provide a reaction force for resisting the movement, so that the movement of the extending structure is prevented, the soil body is effectively prevented from extruding and deforming the retaining wall, and finally a better stabilizing and anchoring effect is achieved. In addition, because the anchoring device is inserted into the soil body under the condition that the included angle between the anchoring device and the horizontal plane is 60-90 degrees, the requirement on the space for transversely allowing the anchoring device to be installed is low, the anchoring device can be better anchored even among a plurality of buildings, and the anchoring device is not influenced by the narrow working space around the anchoring device.

Description

technical field [0001] The invention relates to a support structure for foundation pits, in particular to an external support structure for foundation pits. Background technique [0002] In the prior art, the foundation pit is usually supported by forming an annular retaining wall on the wall of the foundation pit, and inserting the anchor bar from the inner side of the foundation pit of the retaining wall horizontally or obliquely into the soil outside the foundation pit, form an anchor structure. Although this kind of support structure can play an anchoring role, if a better anchoring effect is to be formed, the anchor rod needs to be extended into the soil for a long time, otherwise the anchoring effect is not good. It has a relatively large soil area, otherwise a longer anchor rod cannot be used. However, for building soil in cities, it is usually carried out near one or several tall buildings, and tall buildings usually have a deep foundation or underground space stru...

AI Technical Summary

Problems solved by technology

Although this kind of support structure can play an anchoring role, if a better anchoring effect is to be formed, the anchor rod needs to be extended into the soil for a long time, otherwise the anchoring effect is not good. Has a relatively large soil area, otherwise longer bolts cannot be used

However, for building soil in cities, it is usually carried out near one or several tall buildings, and tall buildings usually have a deep foundation or underground space structure. Once the anchorage in the prior art is adopted For the support method, in order to obtain a better anchoring effect, the anchor rod is inserted horizontally or obliquely with a small angle with the horizontal plane, which is likely to be limited by the underground space structure of the nearby nearby buildings and cannot implement

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