Precast reinforced concrete hollow lateral-force resisting pile and pile embedding method

A technology of anti-lateral force and reinforced concrete, which is applied in the direction of sheet pile walls, buildings, and foundation structure engineering, etc., can solve the problems of low cost, low bending resistance, insufficient rigidity, etc., and achieve low cost and strong bending and shearing resistance , The effect of increasing the overall bending and shearing resistance

Inactive Publication Date: 2012-12-19
HANGZHOU NANLIAN BASE FOUND ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a prefabricated reinforced concrete fasting anti-lateral force pile with high rigidity, strong bending and shear resistance, simple construction, fast construction speed, reliable quality and low cost, which solves the problem of traditional piles in large-depth foundation pit enclosure engineering. The problem of small bending capacity and insufficient rigidity of the surrounding protection piles, while greatly reducing the cost

Method used

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  • Precast reinforced concrete hollow lateral-force resisting pile and pile embedding method
  • Precast reinforced concrete hollow lateral-force resisting pile and pile embedding method
  • Precast reinforced concrete hollow lateral-force resisting pile and pile embedding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 1 As shown, a prefabricated reinforced concrete hollow anti-lateral force pile includes a pile body 2 with a rectangular cross section, the pile body 2 has a steel cage, and an empty stomach area 3 that runs through the entire pile body is provided along the longitudinal axis of the pile body 2; The reinforcement cage includes a plurality of prestressed main reinforcements 4 , abdominal reinforcements 5 and stirrups 6 .

[0059] The two ends of the long sides of the rectangular section of the pile body 2 are thickened areas 7, which are concrete thickened areas, and the main reinforcements 4 that are mainly stressed are arranged in the thickened areas 7 at both ends. Since the main stress tendons are located at both ends of the rectangular section of the pile body 2, the effective height of the section against bending can be greatly increased, thereby greatly increasing the bending strength and rigidity of the pile body 2. The main reinforcement 4 genera...

Embodiment approach 1

[0070] Implementation scheme 1: direct pile-planting method with loose soil at the pile tip.

[0071] This implementation method utilizes a special pile machine, uses multi-axis rotary spraying to loosen the soil and multi-axis vibrating to loosen the soil to introduce holes at the front of the pile, and directly implants the prefabricated reinforced concrete hollow anti-lateral force pile. The specific instructions are as follows:

[0072] 1. Multi-axis rotary grouting to loosen the soil and directly plant piles

[0073] Such as Figure 21 As shown, the pile planting method is to use the specially developed multi-axis rotary nozzle 9 drill pipe 8 to insert and pass through the fasting area 3 of the prefabricated reinforced concrete hollow anti-lateral force pile, and start the multi-axis rotary jet drill pipe 8 after positioning. The soil at the pile end is cut with high-pressure grout to destroy the soil at the pile end. Under the action of the gravity of the pile body (w...

Embodiment approach 2

[0076] Implementation plan two: preformed hole pile planting method

[0077] This implementation method is to use a specially developed pile planting machine, which can be specifically punching and grabbing hole pile planting method and rotary digging hole hole pile planting method. The specific instructions are as follows:

[0078] 1. Punching and grabbing hole-forming pile planting method

[0079] Such as Figure 24-25 As shown, this pile planting method is to grab the hole head 12 with special punching first, and this hole head can be a common punching head similar to the underground diaphragm wall, and make appropriate improvements on the hole size (enlarge or reduce the punching head). Grab head size), so that the size of the hole is consistent with the size of the implanted prefabricated reinforced concrete fasting anti-lateral force pile, and each side is about 5 to 10 cm more. The hole forming process should be divided into dry operation and wet operation according ...

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Abstract

The invention discloses a precast reinforced concrete hollow lateral-force resisting pile comprising a pile body with a rectangular cross section; the pile body comprises a reinforcement cage; the pile body is provided with a hollow area along a vertical axis direction of the pile body, wherein the hollow area runs through the whole pile body; the reinforcement cage comprises a plurality of pre-stressed main reinforcements, a web reinforcement and a reinforcement stirrup; both ends of the long side of the rectangular section of the pile body are thickened areas in which the pre-stressed main reinforcements are arranged. The precast reinforced concrete hollow lateral-force resisting pile has the following beneficial effects: the bending resistance effective height of the long side of the rectangular section is increased by the reasonable arrangement of the hollow area; meanwhile, the concrete thickened areas are arranged at both ends of the long side of the rectangular section, the high-strength pre-stress reinforcements are arranged, and the overall bending shear resistance of the pile body is greatly enhanced, so that an enclosure pile wall has great bending shear resistance, and the demands of deep-pit enclosure works are met; and the pile embedding method of the precast reinforced concrete hollow lateral-force resisting pile has the following advantages of convenience in construction, simplicity, fastness, and the like, and meanwhile, the construction efficiency is increased.

Description

technical field [0001] The invention relates to the field of enclosure technology in deep foundation pit enclosure engineering, slope protection engineering, port embankment engineering, and sea reclamation engineering, in particular to a prefabricated reinforced concrete hollow anti-lateral force pile and a method for planting the pile. Background technique [0002] In the enclosure engineering of excavation construction in various fields of civil engineering, slope protection engineering, and river and sea support engineering, drilling and pouring pile walls is the most commonly used enclosure method, but this method has troublesome construction, slow progress, and high cost. High, the need to transport mud to pollute the environment and other shortcomings. With the continuous increase of excavation depth, the force strength and rigidity of the bored row piles are also insufficient, so the underground diaphragm wall technology has been developed. The underground diaphragm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/30E02D7/24E02D7/26E02D7/28
Inventor 严平
Owner HANGZHOU NANLIAN BASE FOUND ENG
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