Construction method of composite pile

A construction method and technology of composite piles, which are applied in the field of building foundation engineering, can solve problems such as environmental damage, and achieve the effects of improved construction efficiency, reduced cost, and high bearing capacity

Inactive Publication Date: 2014-11-19
骆嘉成 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two construction methods are to form cement soil slurry from the ground surface and then implant core piles, which will inevitably produce excess cement slurry or soil squeezing effect, resulting in waste of resources, environmental pollution and environmental damage

Method used

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  • Construction method of composite pile

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Embodiment Construction

[0013] Such as figure 1 In the shown embodiment, the composite pile of the present invention is a prestressed pipe pile embedded in cement soil, and this embodiment adopts a multi-section prestressed pipe pile.

[0014] Its construction method is as follows:

[0015] (1) With the assistance of a crane, use a vibratory hammer to sink a steel casing with a diameter of Φ900mm, a length of 20m, and a wall thickness of 16mm into the mud layer ⑤.

[0016] (2) Use a rotary drilling rig to take out the soil in the steel casing, and the steel casing remains in the soil layer to act as a wall protection.

[0017] (3) Put the 20m-long drill pipe of the variable-speed cement mixing pile driver from the steel casing to the bottom of the pipe, and then slowly stir it into the lower soil layer after connecting the rod, and then pour it into the lower soil layer of the steel casing. Inject cement slurry and air, the cement content is 25%, the cement slurry water-cement ratio is 1.0, and th...

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PUM

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Abstract

A construction method of a composite pile comprises the steps of (1), sinking a steel sleeve into the center soil layer of a pile position in a vibrating mode or a hammering mode or a static pressure mode, wherein the diameter of the steel sleeve is larger than the diameter of a core pile by 10-80 cm, and the maximum length of the steel sleeve is 40 m; (2), taking out soil bodies in the steel sleeve or below the steel sleeve by a certain depth through a long auger or a rotary drilling rig or a grab bucket; (3), spraying cement paste and gas to the soil layer at the lower portion of the steel sleeve through a speed-variable agitator, agitating the soil and the cement paste to form uniform pasty cement soil at the same time and agitating the soil within the range of 1-3 meters at the pile tip repeatedly, wherein the number of times of vertical agitation is not smaller than 4; (4), implanting the rigid core pile into the steel sleeve in an inserting mode or a vibrating mode, wherein the pasty cement soil overflows and fills the portion between the rigid core pile and the steel sleeve in the implanting process of the rigid core pile, pulling out the steel sleeve before initial setting of the cement soil, and forming the composite pile after the pasty cement soil is hardened. According to the construction method, in the pile implanting process, mud discharging and soil squeezing effects are avoided.

Description

technical field [0001] The invention relates to the field of building foundation engineering, in particular to a construction method of a composite pile. Background technique [0002] At present, the construction method of the composite pile with the outer layer of cement soil and the inner core of high-strength pipe piles that has been publicly used in China can be divided into two types according to the way of forming cement soil: one is to form cement soil in the form of drilling and spraying grout, Such as the static drilling and rooting pile construction method invented by Ningbo Zhedong Building Materials Group, a method for drilling prefabricated composite piles disclosed in Chinese Patent Application No. 200510009711, and another method for forming cement soil by high-pressure rotary spraying or deep mixing method, such as Chinese patent Application No. 200710113491 discloses a composite pile and its construction method, and Chinese patent CN102127910B discloses a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38E02D5/50
Inventor 骆嘉成邹宗煊林富光卢立海
Owner 骆嘉成
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