Engineering pile in karst cave geology and pile forming process

Abstract

The invention relates to an engineering pile in karst cave geology and a pile formation process. The lower part of the engineering pile passes through the geological layer, a cave is positioned in thegeological layer, the engineering pile passes through the karst cave and extends into anupper layer soil body; a circle of jet grouting pile reinforcing body is arranged on the outer wall of the engineering pile in the karst cave in a supporting way; the reinforcing body has a centrosymmetric structure; the cross section of the jet grouting pile reinforcing body is formed by a plurality of minorarcs which are connected with each other end to end; the geological layer sequentially comprises a limestone layer, a fractured rock layer and the upper layer soil body from bottom to top; the cave ispositioned in the fractured rock layer. The engineering pile in the cave geology and the pile forming process have the characteristics of being safe and applicable, and the like, having very good practical and promotional values, and producing good economic benefit after being widely popularized and applied.

Description

technical field [0001] The invention belongs to the field of building construction, in particular to an engineering pile in karst cave geology and a pile-forming process. Background technique [0002] At present, engineering piles in karst geological areas usually adopt the form of mud retaining wall + rotary drilling bored piles. When encountering karst caves with fillers, backfilling flakes or concrete is used to complete the drilling to penetrate the karst cave to the design elevation of the bearing layer, which often needs to be repeated many times. A large amount of rubble or concrete is needed to complete the drilling after only one backfilling, and the pile hole cannot be closed in time, and it needs to be put on hold for a longer time. and the surrounding soil are severely damaged, which brings waste of cost and delays in the construction period. Since the filler in the cave is generally in a flow-plastic state, even if the hole can be formed smoothly after backfilli...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of engineering pile and pile forming technology in karst cave geology, which mainly solves the technical problem that it is difficult to form an effective retaining wall in the karst cave when the engineering pile passes through the karst cave; and solves the problem that the filler in the karst cave no longer flows into the pile In the hole, the sediment at the bottom of the pile and the deformation of the soil in the karst cave will cause the necking of the pile body and the pile breakage, so as to improve the quality of the pile

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