Karst stratum stabilization structure

Abstract

The invention provides a karst stratum stabilization structure used for constructing a punch filling pile. The punch filling pile penetrates through at least one cave in a karst stratum from top to bottom; a hole-wall treatment structure comprises a casing, a pile hole of the punch filling pile, a hole-wall crack water neutralization layer of the pile hole and a mud protection layer, wherein the casing is embedded into the karst stratum at a pile position of the constructed punch filling pile before the punch construction of a top plate of the cave for a certain depth and is far away from the surface of the karst stratum for a certain height; the pile hole is concentric to the casing, and the diameter of the pile hole is smaller than that of the casing; the mud protection layer punctures a cave wall and a pile hole wall behind the top plate of the cave and is sealed, tight and waterproof. Due to the fact that a karst area is treated by using flagstones, clay, straws, cement and the like, the engineering progress is rapid, the engineering quality is reliable, the construction is safe, general resources can be better utilized, and a great number of concrete materials are saved.

Description

technical field [0001] The invention relates to a karst formation stable structure. Background technique [0002] At present, karst formations are widely distributed in southern my country, and most of them are erosive arch caves. On the one hand, caves and fissures in soluble rocks cause incomplete rock structure and local instability; on the other hand, they provide sufficient space conditions for accommodating the strong movement of subsidence materials and groundwater. If the perforated piles in karst stratum are constructed according to the conventional punching method, it is difficult to build walls in unstable strata, resulting in construction quality problems and safety problems. How to ensure that the mud does not leak, so as to form a good hole wall and prevent the hole wall from collapsing , ensuring the quality of the pile foundation and saving the amount of concrete pouring is a considerable technical problem. Contents of the invention [0003] The purpose o...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems that the conventional punching construction method of perforated cast-in-place piles in karst strata easily causes the hole wall to leak and collapse, the amount of concrete is large, and the hidden dangers of the pile foundation quality of perforated cast-in-situ piles are large.

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