Treatment method for difficult waterproof curtain pile forming caused by too large filing pile filling coefficient

Abstract

The invention relates to a treatment method for difficult waterproof curtain pile forming caused by a too large filing pile filling coefficient. The treatment method comprises the steps that firstly,the neck expanding situation of a concrete filling pile is preliminarily judged; secondly, after the filling pile reaches 70% or above of the design strength, rotary jet grouting waterproof curtain pile construction is conducted on the middle point of the connecting line of circle centers of adjacent filling piles; thirdly, for a pile body, with serious neck expanding, of the concrete filling pile, the concrete serious neck expanding depth and degree are preliminarily judged; fourthly, surveying and setting out are conducted, and the filling pile radius distance point is obtained when the middle point of the connecting line of the circle centers of the two adjacent filling piles outwards moves towards the outer side by 1 / 4-1 / 3; fifthly, drilling machine hole guiding is conducted, and is deeper than the designed pile bottom elevation by 30-50 cm; and sixthly, rotary jet grouting waterproof curtain pile construction is conducted. The treatment method is wide in application, and application of the waterproof curtain pile in the aspects of foundation treatment, soil property improvement, water sealing and intercepting and the like is wide.

Description

technical field [0001] The invention relates to a pile-forming technology for water-stop curtain piles, in particular to a treatment method for the difficulty in forming water-stop curtain piles due to excessive filling coefficients of cast-in-situ piles. Background technique [0002] Generally speaking, the foundation pit surrounding protection piles are mainly concrete pouring piles, and the hole forming methods are generally impact drilling, rotary drilling, etc. For areas with high groundwater levels, supporting construction is required for foundation pit excavation. Water curtain piles (high-pressure rotary spray piles, SMW piles, etc.). However, for artificial filling, artificial filling of gravel soil, sandy soil, silt and gravel, and pebble geological layers, due to the need to use mud for wall protection operations due to rotary drilling or impact drilling, resulting in existing problems during the construction process. Different degrees of hole collapse make the f...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, to provide a treatment method for water-stop curtain piles that are difficult to form piles due to excessive filling coefficients of cast-in-situ piles, and to solve the problem of too small net spacing of piles caused by excessive filling coefficients of concrete pouring piles It is difficult to effectively form holes in water curtain piles and the quality is difficult to guarantee

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