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Method for grouting piles by hole forming through inflating

A cast-in-situ pile and hole-forming technology, which is applied to sheet pile walls, buildings, and foundation structure engineering, can solve problems such as the inability to guarantee the stability of hole walls and the limited diameter of prefabricated piles, so as to solve engineering problems and avoid waste , the effect of improving stability

Active Publication Date: 2019-07-05
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in soft clay, the stability of the hole wall cannot be guaranteed no matter which method of hole formation is adopted; using prefabricated piles to hammer piles has many restrictions in construction due to noise problems in densely populated urban areas, and prefabricated piles limited diameter

Method used

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  • Method for grouting piles by hole forming through inflating
  • Method for grouting piles by hole forming through inflating
  • Method for grouting piles by hole forming through inflating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Such as figure 1 The shown method of inflating a bored bored pile includes the following steps:

[0025] Step 1: Prefabricate the geomembrane bag 1. The geomembrane bag 1 is provided with two layers, the inner layer is the inner ring 11, and the outer layer is the outer ring 12. figure 1 As shown, the inner and outer surfaces of the inner and outer rings 12 of the geomembrane bag 1 are provided with a plurality of small bumps with unevenness, the diameter of the bumps is 0.1 cm; the depth of the geomembrane bag 1 is greater than the designed pile depth A depth of 100 cm; the outer ring 12 of the geomembrane bag 1 has the same radius as the pile foundation, and the radius of the inner ring 11 of the geomembrane bag 1 is 5 cm smaller than the radius of the outer ring 12 of the geomembrane bag 1;

[0026] Step 2: Make a hole in the center of the pile, the depth of which is 50cm deeper than the designed depth of the pile foundation; then insert the prefabricated geomem...

Embodiment 2

[0030] Example 2: Such as figure 1 The shown method of inflating a bored bored pile includes the following steps:

[0031] Step 1: Prefabricate the geomembrane bag 1. The geomembrane bag 1 is provided with two layers, the inner layer is the inner ring 11, and the outer layer is the outer ring 12; image 3 As shown, the inner and outer surfaces of the inner and outer rings 12 of the geomembrane bag 1 are evenly provided with attachment strips; the depth of the geomembrane bag 1 is 150 cm deeper than the designed pile depth; the outer ring 12 and the pile radius of the geomembrane bag 1 Similarly, the radius of the inner ring 11 of the geomembrane bag 1 is 20 cm smaller than the radius of the outer ring 12 of the geomembrane bag 1;

[0032] Step 2: Make a hole in the center of the pile, and the depth of the hole is 80cm deeper than the designed depth of the pile foundation; then insert the prefabricated geomembrane bag 1 into the center of the pile;

[0033] Step 3: Measure and calcul...

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Abstract

The invention discloses a method for grouting piles by hole forming through inflating. The method specifically comprises the steps: 1, geomembrane bags are prefabricated; 2, holes are formed in the centers of the pile positions, and then the geomembrane bags are planted into the center holes of the pile positions; 3, the pressure is applied to inner rings, thus the membrane bags are expanded, clayis extruded towards the peripheries, and after the inner rings are completely expanded, the inner rings are closed; 4, after the inner rings are closed, self-compaction fine aggregate concrete is injected into outer rings, after full injection, the outer rings are closed, and curing is conducted; and 5, the inner rings and the outer rings are opened, and the piles are grouted in the inner rings.Noise pollution during construction can be effectively lowered, the pile holes are protected through temporary support structures formed through the concrete so that the stability of the hole walls can be effectively improved, the safety during construction is effectively improved, the engineering problem that pile foundation grouting is conducted by hole forming in the soft clay is effectively solved, and thus the method is suitable for being popularized energetically.

Description

Technical field [0001] The invention belongs to the technical field of the technical field of geotechnical engineering, and specifically relates to a method for inflating a bored pile. Background technique [0002] Cast-in-place piles can be divided into bored piles, sinking pipe-filled piles, manual digging and cast-in-place piles, and explosion-expanded cast-in-place piles according to their different hole forming methods. [0003] However, in soft clay, no matter which method of hole formation is adopted, the stability of the hole wall cannot be guaranteed; the use of prefabricated piles for hammering piling, there are many restrictions on construction in dense urban areas due to noise problems, and prefabricated piles The diameter is not limited. Therefore, how to make a hole in soft clay for pile foundation pouring is an engineering problem. Summary of the invention [0004] In view of the above technical problems, the present invention provides an inflatable hole-forming cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38
CPCE02D5/38E02D2250/0023
Inventor 潘建波何鹏谢琰薛博文郭颍奎
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER