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PRC tubular pile for deep foundation pit supporting and pile connecting method thereof

A deep foundation pit support and deep foundation pit technology, which is applied in excavation, sheet pile walls, foundation structure engineering, etc., can solve the problems affecting the pressure bearing capacity of PRC pipe piles and cracking of welding seams, so as to shorten the time consumption of fixing, Enhance the connection strength and improve the effect of bending resistance

Pending Publication Date: 2020-03-17
广州市地平线岩土工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the pile connection method of most pipe piles still adopts the traditional welding method. When the foundation pit is excavated, the PRC pipe pile is easily squeezed by the soil layer outside the foundation pit, and when two adjacent single-section piles are connected When the joint is subjected to shear force, it is easy to cause the weld seam to crack, thus affecting the pressure bearing capacity of the PRC pipe pile

Method used

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  • PRC tubular pile for deep foundation pit supporting and pile connecting method thereof
  • PRC tubular pile for deep foundation pit supporting and pile connecting method thereof

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Embodiment 1

[0038] refer to figure 1 , is a kind of PRC pipe pile for deep foundation pit support disclosed by the present invention, comprising at least two single-section piles 1 connected to each other and a rigid sleeve 2 fixedly arranged inside the single-section pile 1, according to the drilling data on site Determine the pile connection length and pile pressure depth of the PRC pipe pile, and then determine the number of single-section pile 1 according to the length of the selected single-section pile 1 . The rigid sleeve 2 is fixedly arranged at the joint between two adjacent single-section piles 1, and the rigid sleeve 2 is used to enhance the rigidity of the PRC pipe pile after the pile is connected, thereby improving the strength of the joint between two adjacent single-section piles 1. Bending and shearing resistance to ensure the performance of the PRC pipe pile.

[0039] refer to figure 1 and figure 2 In order to facilitate the insertion of the rigid sleeve 2 inside the ...

Embodiment 2

[0044] A method for connecting piles of PRC pipe piles in deep foundation pits, comprising the following steps:

[0045] Step 1. Sink into the first single-section pile 1:

[0046] S1, the pile driver is in place, the pile driver adopts DF80 diesel pile driver in this embodiment, the pile driver is installed, and the alignment of the pile position is carried out to ensure its vertical stability;

[0047] S2. Hanging piles and inserting piles, first use steel wire ropes and slings to fasten the single-section pile 1, then use the pile driver and crane to lift the single-section pile 1 into the holder, and align the pile tip with the pile position, and then place the pile on the A buffer pad (not shown in the figure) is added to the pile top of the single-section pile 1, so as to reduce the damage of the pile driver to the pile top during the pile sinking process, and then start the pile-pressing oil cylinder to push the lower end of the single-section pile 1 by 0.3m-0.5m press...

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Abstract

The invention relates to a PRC tubular pile for deep foundation pit supporting and a pile connecting method thereof and belongs to the technical field of pile foundation construction. The PRC tubularpile comprises at least two single piles connected to each other and rigid sleeves fixedly arranged in the single piles. The rigid sleeves are fixedly arranged at the connections between two adjacentsingle piles. By fixedly arranging the rigid sleeves in the connections between two adjacent single piles, the anti-bending and anti-shear abilities of the PRC tubular pile are improved, so that the service performance of the PRC tubular pile is guaranteed.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction, in particular to a PRC pipe pile for deep foundation pit support and a pile connection method thereof. Background technique [0002] In the development and construction of high-rise buildings, super high-rise buildings and underground spaces, deep foundation pit excavation is an essential construction step. Prestressed concrete pipe pile with mixed reinforcement (PRC pipe pile) is a new type of prestressed concrete pipe pile formed by reasonable reinforcement method and adjustment of concrete formula, so that the ductility and horizontal bearing capacity of the pile body can be greatly improved. improve. [0003] The length of the PRC single-section pile is limited by the manufacturing mold and the length of the transport vehicle, and cannot be adjusted arbitrarily according to the construction requirements. Only when the single-section piles of the joints are connected can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/52E02D5/58E02D17/04
CPCE02D5/526E02D5/58E02D17/04
Inventor 寇举安秦凯张凤祥刘熙平陈国志李林太
Owner 广州市地平线岩土工程有限公司
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