Mixed soil extruded and cured precast pile for soft foundation treatment as well as construction method

A technology of soft foundation treatment and mixed soil, which is applied in the direction of foundation structure engineering, sheet pile walls, buildings, etc., can solve problems such as poor work efficiency, uncontrollable pile type, and difficult quality assurance, so as to improve the overall bearing capacity and realize modularization Construction and the effect of reducing construction costs

Active Publication Date: 2016-03-23
WUHAN ZHONGLI GEOTECHN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that it does not use the clay that is generally available on the spot, but has a large demand for lime, and the prefabricated pile body lacks materials with strong cohesive force. The pile body must be a partial brittle material, and the length of the prefabricated pile must be Restricted, and there is no way to effectively deal with the joints, there are great doubts about its practicability, and the effect on improving the overall bearing capacity of the foundation is very limited, and the advantages of prefabricated piles have not been fundamentally utilized
This invention can improve the strength of cement-soil mixing piles, but the disadvantages are very obvious, the construction process is complicated, the quality is difficult to guarantee, and the cost is high, so the practicability is general
[0007] In addition, among the current patents on using construction waste to form piles to treat foundations, such as Wang Guangming’s method of hammer punching and expanding construction waste compaction piles (ZL: CN93109708), Wang

Method used

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  • Mixed soil extruded and cured precast pile for soft foundation treatment as well as construction method
  • Mixed soil extruded and cured precast pile for soft foundation treatment as well as construction method

Examples

Experimental program
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Example Embodiment

[0036] Example 1:

[0037] Combine below figure 1 , figure 2 The present invention is described in further detail:

[0038] A mixed soil extrusion-solidified prefabricated pile for soft foundation treatment, which consists of a first mixed-soil extrusion-solidified prefabricated pile 1b, a second mixed-soil extrusion-solidified prefabricated pile 1a, a central hole 2, a seamless steel pipe 3, a vibration Immersed tube 4, surface 5, drilled hole 6, cement mortar 7, pile joint 8, foundation soil 9, grouting pipe 10, center hole 2, such as figure 1 It can be seen that, from bottom to top, it is characterized in that the foundation soil 9 is connected with the vibrating sinker 4, the vibration sinker 4 is connected with the borehole 6, and the borehole 6 is respectively connected with the first mixed soil extrusion-solidified prefabricated pile 1b, the second mixed soil The soil extruded and solidified prefabricated pile 1a is connected, the second mixed soil extruded and so...

Example Embodiment

[0040] Example 2 ：

[0041] A construction method for a mixed soil extrusion-solidified prefabricated pile for soft foundation treatment, the steps of which are:

[0042] ① Hole forming:

[0043] The vibrating immersed pile driver is used. Starting from the surface 5, the vibrating immersed pipe 4 is used in the foundation soil 9, and the drilling hole 6 is constructed from top to bottom to the design depth (generally 20m), and the vibrating immersed pipe 4 is temporarily left in the foundation soil. 9 is used as the support for the drilled hole 6, which provides the prerequisites for the sequential installation of the prefabricated piles 1 extruded and solidified by the mixed soil.

[0044] ②Hanging and extruding and solidifying prefabricated piles of mixed soil:

[0045] Using a vibrating pipe sinking pile machine, the first mixed soil extrusion-solidified prefabricated pile 1b and the second mixed soil extrusion-solidified prefabricated pile 1a are successively hoisted...

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Abstract

The invention discloses a mixed soil extruded and cured precast pile for soft foundation treatment as well as a construction method. Foundation soil is connected with drill holes which are connected with mixed soil extruded and cured precast pile bodies, the mixed soil extruded and cured precast pile bodies are connected with cement mortar through a central hole, and the cement mortar is connected with a seamless steel pipe which is connected with a grouting pipe. The construction method comprises the following steps: A, a vibrating pipe-sunk pile machine is adopted for hole forming; B, the mixed soil extruded and cured precast pile bodies are placed; C, the seamless steel pipe is placed, and a vibrating sunk pipe is pulled out; D, grouting is performed: the a seamless steel pipe is connected with the grouting pipe, pressure cement mortar is grouted into the seamless steel pipe, and the seamless steel pipe and the precast pile bodies form the integral mixed soil extruded and cured precast pile after mortar curing; E, integral construction is performed. The mixed soil pile is precast by waste construction waste and common clay, the manufacture is convenient and fast, the quality is reliable, the transport cost is reduced, modular piling construction is efficient and convenient, and the integral bearing capacity of a foundation is improved effectively.

Description

technical field [0001] The invention relates to the technical field of soft foundation treatment, more specifically to a mixed soil extruded and solidified prefabricated pile for soft foundation treatment, and also relates to a construction method for the mixed soil extruded and solidified prefabricated pile for soft foundation treatment. Background technique [0002] Soft foundation is composed of highly compressive soil layers such as silt, silty soil, flush fill, and miscellaneous fill. In the construction of highways, buildings, ports, airports, etc., there are a lot of soft foundation treatment problems. , it is necessary to solve the problems of low bearing capacity and serious deformation under load. Among the currently commonly used soft foundation treatment methods, the surcharge preloading method is simple in construction, but the construction period is long and requires a large amount of earthwork; the dynamic compaction method is simple in construction and fast i...

Claims

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Application Information

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IPC IPC(8): E02D5/50E02D5/52E02D11/00
CPCE02D5/50E02D5/523E02D11/00E02D2250/0023E02D2300/0021
Inventor 雷美清刘观仕戴也孔令伟
Owner WUHAN ZHONGLI GEOTECHN ENG
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