Overlong bolt pile and construction method thereof

A construction method and screw technology, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problems of inconvenient construction and height influence, and achieve the effect of convenient transportation and firm connection

Active Publication Date: 2017-01-04
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects that the construction is affected by the height and the construction is inconvenient, and provide a new type of super-long screw pile and its construction method that is convenient for construction, good in economy, and suitable for increasing the length of the pile under the restriction of low altitude

Method used

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  • Overlong bolt pile and construction method thereof
  • Overlong bolt pile and construction method thereof
  • Overlong bolt pile and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] An ultra-long screw pile is characterized in that N-level screw piles are composed of N screw pile units 1. N is a natural number greater than 2. The first-level screw pile unit 1 is the lowest level of the super-long screw pile, and the N-th level screw pile unit 1 is the uppermost level of the super-long screw pile. The super-long screw piles are grade N, grade N-1, ..., grade 2, grade 1 from top to bottom. From top to bottom of the super-long screw pile, the smaller diameter end of each level of screw pile unit 1 is screwed into the blind hole 103 of the next level of screw pile unit 1, finally forming a complete super-long screw pile.

[0032] The screw pile unit 1 of each stage is an inverted circular platform, and the bottom surface of the screw pile unit 1 with a smaller diameter is the bottom surface I104 of the circular platform. The bottom surface of the screw pile unit 1 with a larger diameter is the bottom surface II 105 of the circular platform, and the b...

Embodiment 2

[0040] The main structure of this embodiment is the same as that of Embodiment 1, further: this embodiment provides some dimension parameters of the present invention.

[0041] The diameter of the bottom surface II 105 of the screw pile unit 1 is 500-1000 mm. The commonly used dimensions of the screw pile unit 1 are shown in Table 1.

[0042] Table 1 Common dimensions of screw piles

[0043]

Embodiment 3

[0045] A kind of construction method about the ultra-long screw pile described in embodiment 1, comprises the following steps:

[0046] 1).Initial pile insertion, align the pile tip 101 of the first-level screw pile unit 1 vertically downward to the pile position, and use a pressure-applying device to press the pile tip 101 into the ground to a certain depth at the upper end of the first-level screw pile unit 1 .

[0047] 2). After the pile tip 101 is inserted into the ground, keep the upper end pressure, and at the same time apply torque to the screw pile unit 1 to rotate the screw pile unit 1, so that the screw pile unit 1 continues to screw into the ground.

[0048] After the screw pile unit 1 is stable, you can stop applying pressure, only apply torque, and twist the pile body until the part screwed into the foundation reaches more than 4 / 5 of the screw pile unit 1, then stop applying torque and pressure.

[0049] 3). Take another second-level screw pile unit 1, and screw...

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Abstract

The present invention discloses an overlong bolt pile and a construction method thereof. The overlong bolt pile is characterized in that N bolt pile units form an N-stage overlong bolt pile (N is a natural number greater than 2). The first-stage bolt pile unit is the bottommost stage of the overlong bolt pile, and the N-th stage bolt pile is the topmost stage of the overlong bolt pile. The overlong bolt pile is orderly divided into the N-th stage, the (N-1)th stage,..., the second stage, and the first stage from top to bottom. Each stage of bolt pile unit is an inverted truncated cone, and the smaller-diameter bottom surface of the bolt unit is a bottom surface I of the truncated cone. The larger-diameter bottom surface of the bolt unit is a bottom surface II of the truncated cone, and a blind hole is formed in the bottom surface II. The blind hole which is a truncated cone-shaped hole is coaxial with the bolt pile unit. Internal threads are formed on the wall of the blind hole. A pile tip is connected to the bottom surface I of the first-stage bolt pile unit, and external threads are formed on the outer surface of the bolt pile unit. The overlong bolt pile is composed of short piles and thus convenient to transport. The short piles are provided with threaded joints to achieve firm connection.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to an ultra-long screw pile and a construction method thereof. Background technique [0002] With the rapid development of urban construction and the improvement of road traffic construction standards, pile foundation has gradually become the most widely used foundation reinforcement treatment technology. There are many types of pile foundations, which are divided into two categories: prefabricated piles and cast-in-situ piles according to the construction method. Cast-in-situ piles, manual excavation piles, etc. [0003] There is already a prestressed screw pile technology in the prior art, which proposes a new prestressed screw pile manufacturing technology with convenient construction, good economy and convenient use. By making a concrete tapered cylinder with a large top and a small bottom, the outer surface of the pile has threads, the inside of the pile body is emb...

Claims

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Application Information

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IPC IPC(8): E02D5/30E02D5/52E02D5/56E02D7/22
CPCE02D5/30E02D5/523E02D5/526E02D5/56E02D7/22
Inventor 丁选明刘汉龙刘家易郑长杰仉文岗
Owner CHONGQING UNIV
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