CN211773579U

CN211773579U - Pile top steel plate and flange connecting structure

Info

Publication number: CN211773579U
Application number: CN201922366558.2U
Authority: CN
Inventors: 王丽梅; 张振禹; 席波; 郭建东; 王磊
Original assignee: China Construction Sixth Engineering Division Co Ltd; China Construction Sixth Engineering Bureau Civil Engineering Co Ltd
Current assignee: China Construction Sixth Engineering Division Co Ltd; China Construction Sixth Engineering Bureau Civil Engineering Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-10-27
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a pile bolck steel sheet and flange joint structure, including squeezing into the many stress concrete tubular piles that set up the position underground, each stress concrete tubular pile comprises the multistage tubular pile, and wherein the bottom surface of the last section tubular pile of each stress concrete tubular pile supports the pile bolck of one section tubular pile down, the pile bolck elevation of the last section tubular pile of each stress concrete tubular pile exceed ground 1m setting, be fixed with the ring flange on the pile bolck of last section tubular pile, the four corners of a square steel sheet and the ring flange welding of the pile bolck of last section tubular pile are together with the stake core top surface of the last section tubular pile of shutoff. The pile core is not blocked by adopting the soil body with the structure.

Description

Pile top steel plate and flange connecting structure

Technical Field

The utility model relates to a pile top steel sheet connection structure especially relates to a pile top steel sheet and flange joint structure.

Background

The pretensioned prestressed concrete pipe pile is a pile foundation form adopting soil-extruding or semi-soil-extruding, and is a stress rod member which can transfer the load of building into foundation soil and possesses a certain bending-resisting and pressure-resisting property, and the prestressed pipe pile mainly can be used for bearing vertical load. Pile sinking methods for pipe piles are various, and the most used method is static pressure method.

Two sections of pipe piles are adopted for the residence and the construction foundation, and the pile splicing mode adopts welding pile splicing. The pile sinking mode adopts a holding type static pressure pile machine. According to the design requirement, 3500mm deep C35 micro-expansion concrete needs to be poured into the pile core. Considering that the elevation of the pile top of the pile sinking is about 1600-1700mm below the ground level of the site, if the pile hole is directly backfilled and earth excavation is carried out after the static load test is finished, the pile core is inevitably blocked by soil. According to the method, the square steel plate is welded on the pile top, so that the pile core is prevented from being blocked by soil, and a convenient construction environment is provided for core filling construction after earth excavation in the later period.

The Chinese patent with the application number of CN201320251436.9 discloses a connection structure of an end plate and a steel bar of a prestressed concrete tubular pile, which comprises the end plate and the steel bar, wherein the end plate is provided with a bolt hole, and the bolt hole is communicated with a pier head clamping arc groove and a steel bar conical hole with a large upper diameter and a small lower diameter through a groove; the steel bar and the upset head and the conical steel bar clamping part on the steel bar are integrally formed, and the upset head and the conical steel bar clamping part in the steel bar are respectively matched with the upset head clamping arc groove and the steel bar conical hole in the end plate in a matched clamping mode. The patent is not suitable for the condition that the elevation of the pile top is about 1m below the horizon on site, and if the pile hole is directly backfilled and earth excavation is carried out after static load test is finished, the pile core is inevitably blocked by soil.

Disclosure of Invention

An object of the utility model is to overcome prior art's not enough, provide a construction cost is low, and convenient and fast has both saved a large amount of manpowers, time and expense, and the pretensioning method prestressed concrete pipe pile bolck shutoff construction method that the work efficiency of construction is high.

The utility model discloses a pile bolck steel sheet and flange joint structure, including squeezing into the many stress concrete tubular piles that set up the position underground, each stress concrete tubular pile comprises the multistage tubular pile, wherein the pile bolck of one section tubular pile under is supported to the bottom surface of last one section tubular pile of each stress concrete tubular pile, the pile bolck elevation of the last section tubular pile of each stress concrete tubular pile exceed ground 1m and set up, be fixed with the ring flange on the pile bolck of last section tubular pile, the four corners of a square steel sheet and the ring flange welding of the pile bolck of last section tubular pile are together with the stake core top surface of the last section tubular pile of shutoff.

The steel plate used by the structure is welded at the pile end, so that the soil body can be effectively prevented from falling into the pile core. The soil body at the lower end of the tubular pile cannot be squeezed into 3500mm below the pile top, and the pile sinking construction cannot be influenced by welding the steel plate. The steel plate for plugging is simple to manufacture and low in cost. The steel sheet is demolishd after pouring the bed course, can prevent that the bed course concrete from falling into the pile core, probably reduces the waste of concrete to minimum. And the pile sinking construction method is simple to dismantle, and the pile sinking construction and the later-period pile core pouring construction are not influenced.

Drawings

Fig. 1 is the utility model discloses a pile bolck steel sheet and flange joint structure construction node schematic diagram.

Detailed Description

The invention will be described in detail with reference to the following drawings and specific embodiments:

as shown in fig. 1 a pile bolck steel sheet and flange connection structure, including hitting into and setting up many underground stress concrete tubular pile 2 of location, each prestressed concrete tubular pile 2 comprises multistage tubular pile, wherein the bottom surface of the last one section tubular pile of each prestressed concrete tubular pile 2 supports the pile bolck of one section tubular pile down, the pile bolck elevation of the last one section tubular pile of each prestressed concrete tubular pile 2 set up higher than ground 1m, be fixed with the ring flange on the pile bolck of last one section tubular pile, the ring flange welding of the four corners of a square steel sheet 1 and the pile bolck of last one section tubular pile is in the same place with 3 top surfaces of the pile core of the last one section tubular pile of shutoff.

The construction method of the structure comprises the following steps:

(1) sequentially driving each section of pipe pile forming a prestressed concrete pipe pile 2 into the ground at a set position in a segmented mode, wherein the bottom surface of the upper section of pipe pile is supported on the pile top of the lower section of pipe pile, and when the last section of pipe pile of the prestressed concrete pipe pile 2 is fed, a holding and pressing type static pressure pile machine is adopted to feed the last section of pipe pile until the elevation of the pile top is 1m higher than the ground;

(2) welding four corners of the square steel plate 1 and a flange plate at the pile top of the last section of tubular pile together by spot welding by using an alternating current welding machine so as to plug the pile core top surface of the last section of tubular pile;

(3) after the last section of tubular pile is kept still for 1-2 minutes, clamping the pile end of the last section of tubular pile by the pile feeder, enabling the pile end of the pile feeder to be parallel to the top surface of the last section of tubular pile, and then feeding the pile in the vertical direction until the pile top elevation of the last section of tubular pile is lower than the ground of the site;

(4) repeating the steps (1) to (3) to construct a plurality of prestressed concrete pipe piles;

(5) excavating a foundation pit in the outer circumferential direction of each prestressed concrete pipe pile 2, then cleaning the bottom surface of the foundation pit, and finally pouring a cushion layer on the bottom surface of the foundation pit, so that a pile body and an original soil body can be prevented from being mechanically disturbed;

(6) and (3) removing the steel plate 1 for plugging, inserting the corrugated pipe into 3500mm from the pile top of each prestressed concrete pipe pile to judge whether the pile core of each prestressed concrete pipe pile is plugged, and pouring core filling concrete into the pile core of each prestressed concrete pipe pile if the pile core of each prestressed concrete pipe pile is not plugged.

Claims

1. The utility model provides a pile bolck steel sheet and flange joint structure which characterized in that: including hitting into many stress concrete tubular piles in the setting position underground, each prestressed concrete tubular pile comprises multistage tubular pile, and wherein the bottom surface of last one section tubular pile of each prestressed concrete tubular pile supports the pile bolck of one section tubular pile under, the pile bolck elevation of last one section tubular pile of each prestressed concrete tubular pile exceed ground 1m and set up, be fixed with the ring flange on the pile bolck of last one section tubular pile, the four corners of a square steel sheet welds the pile core top surface with the shutoff of last one section tubular pile together with the ring flange of the pile bolck of last one section tubular pile.