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Construction method of composite pile with implanting-in rigid-body embedded into hard bearing stratum

A construction method and a technology of hard holding force, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of mud transportation, soil extrusion, etc., and achieve the effect of convenient pile formation, increased surface area, and low cost

Active Publication Date: 2013-04-03
HANGZHOU NANLIAN BASE FOUND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a new type of pile construction method, which solves the problem of mud transportation during the construction of traditional bored piles and the soil squeezing problem of directly driving into prefabricated piles

Method used

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  • Construction method of composite pile with implanting-in rigid-body embedded into hard bearing stratum
  • Construction method of composite pile with implanting-in rigid-body embedded into hard bearing stratum
  • Construction method of composite pile with implanting-in rigid-body embedded into hard bearing stratum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] When constructing composite piles, the upper drill pipe for large-diameter stirring and the lower drill pipe for small-diameter stirring in the hard bearing layer are firstly configured according to the distribution of the soil layer. If it is to be embedded in the bedrock, a special drill bit with air impact should be equipped. And align the pile driver to the soil position required by the design.

[0044] Such as Figure 9As shown, the drill pipe of the piling machine is composed of upper and lower parts. The upper drill pipe and the lower drill pipe are connected into one body through the connecting mechanism. The upper drill pipe has spiral stirring blades and drill bits distributed at intervals, and the lower drill pipe has Continuously distributed spiral blades and bedrock drill bit with auxiliary air impact function.

[0045] Such as Figure 1-2 As shown, when the upper part of the soil is a soft soil layer commonly found in coastal areas, and the lower part is...

Embodiment 2

[0051] Such as Figure 3-5 As shown, when the upper part of the soil is a soft soil layer and the lower part is a hard-bearing layer, the design requires that the composite pile enter the hard-bearing layer deeper or even into the bedrock layer. The specific construction method of the composite pile is:

[0052] First of all, the pile machine should be equipped with the upper drill pipe, the lower drill pipe and the mixing blades, helical blades and drill bits matched with the upper and lower drill pipes;

[0053] The construction method of the upper soft soil layer is the same as that of the soft soil layer in Example 1, all of which are to carry out large-diameter stirring and grouting to the soil body through the stirring blades on the drill pipe of the pile planter, and form in the soft soil layer. A cement-soil hole with a diameter of D1, but the drilling speed of the pile driver is 1 m / min, and the rotational stirring rate is 30 rpm.

[0054] When the drill bit and heli...

Embodiment 3

[0057] Such as Figure 6-7 As shown, when the soil properties of the upper and lower layers of the soil body of the construction site are good, but it is difficult to use the traditional driving or pressing prefabricated piles to form piles in place, the method of the present invention is relatively simple, and the specific construction steps are as follows:

[0058] The pile planting machine drills and mixes the soil through the mixing blades and helical blades on the drill pipe, grouting while drilling, and then enters the depth of the hard bearing layer or bedrock layer required by the design, withdraws the rod, and uses pile planting The vibration and press-in functions of the machine implant the rigid body in place, and the cement slurry condenses to form cement soil 2, and the cement soil 2 wraps the rigid body 1 to form a composite pile that meets the bearing capacity requirements.

[0059] The diameter of the circle formed by the stirring blade and the helical blade is...

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Abstract

The invention discloses a construction method of a composite pile with an implanting-in rigid-body embedded into a hard bearing stratum. The method comprises the following steps: configurating drill rods and drill bits: configurating an upper drill rod used for large-diameter stirring and a lower drill rod used for small-diameter stirring in the hard bearing stratum according to soil layer distribution, and aligning a pile implanting machine to the soil position required by a design; grouting and drilling: using the pile implanting machine to drill and stir the soil through stirring blades of the upper drill rod and helical blades of the lower drill rod, meanwhile, pouring cement paste to the stirring soil, and drilling and stirring to the predetermined depth in place; withdrawing the rods: lifting the drilling rods to quit the stirring soil; implanting the pile: utilizing the pressure and vibration function of the pile implanting machine to embed the rigid body into the hard bearing stratum, so that the composite pile is formed. The method has the benefits that no slurry is transported outwards, the adjacent soil cannot be extruded, the bearing capacity of the pile body can be greatly improved, and the range of application is wide; and the method has the advantages of convenience for pile forming, fast construction speed, low construction cost, high bearing capacity and the like.

Description

technical field [0001] The present invention relates to a construction technique of engineering piles, in particular to a new type of pile body suitable for common soil layers and used for pressure bearing and pullout resistance - the construction of a composite pile with a rigid body embedded in a hard bearing layer embedded in a strong mixing soil According to the method, the new type of pile can be used as a pressure pile or an uplift pile in various fields of civil engineering. Background technique [0002] At present, in various fields of civil engineering such as construction engineering, water conservancy engineering, and road and bridge engineering, bored piles are the most commonly used pile bodies. They have the advantages of mature construction technology, simple equipment, and strong applicability, but they also have high cost, The pile-forming construction process is complicated and the quality control requirements are high, especially the bored pile technology ...

Claims

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Application Information

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IPC IPC(8): E02D5/50
Inventor 严平
Owner HANGZHOU NANLIAN BASE FOUND ENG
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