Method for forming cast-in-place pile in karst development area
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A technology of development zone and cast-in-situ pile, which is applied in the direction of sheet pile wall, building, foundation structure engineering, etc., and can solve the problems of large amount of concrete overfilling and concrete filling, etc.
Active Publication Date: 2021-09-07
SHENZHEN GONGKAN GEOTECHN GRP
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[0004] The purpose of the present invention is to provide a pile-forming method for cast-in-place piles in karst development areas, aiming to solve the problem in the prior a
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[0032] In order to make the objectives, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely intended to illustrate the invention and are not intended to limit the invention.
[0033] The implementation of the present invention will be described in detail below with reference to the specific embodiments.
[0034]The same or similar components in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it is to be understood that if there is a term "upper", "lower", "left", "right", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, is merely intended to describe the present invention and simplified description, rather...
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Abstract
The invention relates to the technical field of cast-in-place piles, and discloses a method for forming a cast-in-place pile in a karst development area. The method comprises the following construction steps that (1) a full-slewing drilling machine is used for driving a sleeve to rotate and press downwards, and a pile hole is formed in the sleeve;(2) a slag removal barrel is put into the sleeve for primary hole cleaning, and sediment at the bottom of the pile hole falls into a containing cavity of the slag removal barrel from top to bottom;(3) a reinforcement cage is arranged below the interior of the pile hole, the periphery of the reinforcement cage is wrapped with a metal outer wire net, and the periphery of the metal outer wire net is wrapped with a dense-mesh nylon net;(4) a slag removing head is put into the pile hole for secondary hole cleaning, and the sediment is driven to upwards surge to be in a suspended state;(5) concrete is poured into the pile hole through a pouring pipe, and meanwhile the sleeve is upwards and longitudinally pulled out; the method for forming the cast-in-place pile in the karst development area has the following advantages that (1) drilling efficiency is high;(2) a problem of diffusion and loss of concrete towards a karst cave after the sleeve is pulled out is solved;(3) loss of the concrete is effectively controlled; and (4) on-site civilized construction condition is good.
Description
Technical field [0001] The present invention patent relates to the field of pile, in particular, it relates to pile into the pile region Karst method. Background technique [0002] In karst area, the general geological structure is complicated, caves and fissures common development. Cave generally have a single, multi-layer (beaded) cave, a small cave (hole ≤3m high), a large cave (high-dong> 3m), a full-filled, semi-filled, unfilled cave; showed fissures solution groove, lyocell, stalagmites, stone bud development, in particular wherein the rock surface is inclined larger. [0003] Pile construction in karst area, generally the most common use of impact and Rotary Drilling hole technology, Rotary Drilling into the hole in the process, the process requires the use of partial holes filled with concrete, since the surface is inclined rock drill often causes uneven stress uniform, easily inclined holes occur, sticking, out drill, impact drill requires repeated backfill stone, cla...
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