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Construction method for replacing cast-in-place pile

A construction method and cast-in-place pile technology, applied in sheet pile wall, foundation structure engineering, foundation structure repair and other directions, can solve the problem of difficulty in replacing the old pile body with the new pile body, etc., so as to improve the burying efficiency and quality, reduce the The effect of small hidden danger and small impact on the surrounding environment

Inactive Publication Date: 2018-11-09
深圳市工勘基础工程有限公司 +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a construction method for replacing cast-in-situ piles, aiming to solve the problem in the prior art that it is difficult to replace old piles with new piles in the renewal of urban projects

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  • Construction method for replacing cast-in-place pile
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  • Construction method for replacing cast-in-place pile

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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] In the drawings of this embodiment, the same or similar symbols correspond to the same or similar components; The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. Construction and operation, so the words describing the positional relationship in the drawings are only for illustrative...

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Abstract

The invention relates to the technical field of rotary excavating cast-in-place piles, and discloses a construction method for replacing cast-in-place piles. The construction method comprises the following steps that (1), a full rotary drilling machine sinks a sleeve around an old pile body to the bottom of the old pile body to isolate the old pile body from a soil body and pull out the old pile body to form an old pile hole; (2), the old pile hole is backfilled with cement soil, and the sleeve is pulled out while backfilling; (3), cement-mixed soil is tamped and stand for a week; (4), an outer retaining cylinder is embedded, then an inner retaining cylinder is embedded, the inner retaining cylinder is located in the outer retaining cylinder, and the outer retaining cylinder is provided with positioning structure; and the lower part of the inner retaining cylinder sinks to the lower part of the bottom of the old pile hole; (5), the soil body inside the inner retaining cylinder is excavated to form a new pile hole; and (6), a steel cage is lowered, concrete is poured, and a new pile body is formed. The old pile body is removed integrally, the work efficiency is higher, and recoveryand management are facilitated; the backfilling of old pile hole reduces the quality hidden trouble of the new pile hole; and through the construction method, old pile bodies and new pile bodies can be replaced in the urban project renewal.

Description

technical field [0001] The invention relates to the technical field of replacing cast-in-situ piles, in particular to a construction method for replacing cast-in-place piles. Background technique [0002] With the needs of urban construction development, the available land for urban construction will gradually decrease. Therefore, urban renewal is the trend of urban modernization. However, there are a large number of old foundation piles in the site of such projects, and new construction projects appear The phenomenon that the pile foundation overlaps or partially overlaps with the old pile. [0003] At present, for the treatment of old piles in urban renewal projects, under normal circumstances, the impact crushing method is adopted, and the concrete and steel cage of the old piles are broken from top to bottom with an impact hammer. During the impact process of this method, the electromagnet often needs to be replaced , to ensure the adsorption of old steel bars, the oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D37/00E02D9/02E02D5/38
CPCE02D5/38E02D9/02E02D37/00
Inventor 王雄李洪勋雷斌高子建吴晓玲袁维明崔炳辰
Owner 深圳市工勘基础工程有限公司
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