Inter-pile soil supporting method

Abstract

The invention relates to an inter-pile soil supporting method. The inter-pile soil supporting method comprises the steps of performing soil slope finishing, specifically, after earth of foundation pitengineering is excavated to expose the pile bodies of slope protecting piles, enabling the excavated surface of inter-pile soil (2) to be level to the surface formed by the slope protecting piles (1)on both sides; drilling holes and mounting expansion bolts, specifically, drilling holes in the exposed surfaces of the pile bodies of the slope protecting piles (1) in the vertical direction for mounting the expansion bolts (3); hanging meshes, specifically, covering the exposed surfaces of the slope protecting piles (1) and the inter-pile soil (2) with steel wire meshes or reinforcing bar meshes; arranging steel belts, specifically, pressing the steel belts (4) in the vertical direction onto the exposed surfaces of the pile bodies of the slope protecting piles (1), pressing and fastening the steel tapes (4) with the expansion bolts (3) to fix the steel wire meshes / reinforcing bar meshes; spraying a concrete surface layer, specifically, spraying the concrete surface layer (5) onto the steel wire meshes / reinforcing bar meshes at a thickness not smaller than 50 mm. The inter-pile soil supporting method can rapidly fixe the hung meshes to avoid loss of inter-pile soil, thereby being particularly applicable to moisture-containing sand layers for ensuring stability of inter-pile soil of foundation pit supporting.

Description

Technical field [0001] The invention is a method for supporting soil between piles and belongs to the technical field of fixed construction. Background technique [0002] Building foundation pits or slopes are supported by column-type slope protection piles. In view of the poor self-standing of the soil between the piles, anchor shotcrete is often used to support the soil between the piles after excavation. [0003] The current industry standard "Technical Regulations for Building Foundation Pit Support" (JGJ120) stipulates that "the protective measures of the soil between the piles should be sprayed concrete surface with built-in steel mesh or steel mesh. The thickness of the sprayed concrete surface should not be less than 50mm, and the concrete strength level It should not be less than C20. The vertical and horizontal spacing of the steel mesh in the concrete surface layer should not be greater than 200mm. The steel mesh or steel wire mesh should be connected to the piles on bot...

AI Technical Summary

Problems solved by technology

However, manual trimming is generally done by digging 200mm to 300mm deep to the outside of the slope protection pile at the middle position of the slope protection pile, and the arched soil effect cannot play a role;

[0007] ② On-site machining accuracy is insufficient, the arch height of the transverse tie bar is not easy to control, and the effect of the reinforcement is not obvious;

[0008] ③The method of planting the transverse tie bars is unreasonable. The on-site operation is often to drill holes on the neutral surface of the slope protection piles on both sides with a hand-held electric drill and directly insert the tie bars into the holes without injecting the planting glue. The connection of side slope protection piles is not firm;

[0009] ④ The above traditional construction methods are greatly affected by the seasons. In the northern region, the winter freeze rises and the spring freeze-thaw causes the soil surface between the piles to frequently collapse.

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