CN112252307A

CN112252307A - Pile column structure for permanently-faced combined double-steel-pipe upright column pile

Info

Publication number: CN112252307A
Application number: CN202011222139.2A
Authority: CN
Inventors: 资明玖; 程冉; 刘坤; 胡仁志
Original assignee: China Construction Fourth Engineering Division Corp Ltd
Current assignee: China Construction Fourth Engineering Division Corp Ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-01-22

Abstract

The invention discloses a pile structure of a double-steel-pipe upright pile for permanent and temporary combination, which comprises: double steel tube upright posts, concrete cast-in-place piles and measure steel tubes; the double-steel-pipe upright comprises two steel pipes which are arranged in parallel and a plurality of batten plates welded between the two steel pipes, wherein the bottom ends of the two steel pipes are welded with a cone base, and the bottoms of the two steel pipes are welded with a plurality of anti-shearing hoop rings; pile reinforcement cages are arranged in pile holes of the concrete cast-in-place piles, the bottoms of the double-steel-pipe upright columns extend into the pile holes, and concrete is cast in the pile holes to form the concrete cast-in-place piles, so that the double-steel-pipe upright columns are embedded into the concrete cast-in-place piles; and sealing circular plates are welded at the top ends of the two steel pipes, and are lengthened to be above the ground through the steel pipes by adopting a welding measure. The invention has the advantages of dual purposes of one column, environmental protection and economy compared with the traditional upright column pile, simple structure, convenient installation and easy adjustment.

Description

Pile column structure for permanently-faced combined double-steel-pipe upright column pile

Technical Field

The invention belongs to the technical field of construction engineering construction, and particularly provides a pile column structure for a permanently-temporary combined double-steel-pipe upright column pile.

Background

In the traditional super high-rise deep foundation pit construction, the upright column pile is a more key control item, and the structure stress of the upright column pile is limited by adopting a lattice column or a single steel pipe column, or the upright column pile is used as a temporary upright column or a small-sized structural column of a basement and an apron building, the structure needs to be greatly strengthened, or the stress requirement of the structural column of the tower building is difficult to achieve.

In addition, because of the stress characteristic of the super high-rise structure, the section size of the tower column is usually larger, the forward construction method is also usually adopted when the section steel concrete column is adopted for construction, and the forming quality of the tower column is difficult to ensure by the reverse construction method.

Disclosure of Invention

The invention aims to provide a pile column structure for a permanently-adjacent combined double-steel-pipe upright column pile, which is used as a support upright column and a permanent structural column and can effectively solve the problems.

The technical scheme of the invention is as follows: a pile structure for a permanently faced bonded double steel pipe stud pile, comprising: a double-steel-pipe upright column 1, a concrete cast-in-place pile 2 and a measure steel pipe 3; the double-steel-pipe upright column 1 comprises two steel pipes 1a which are arranged in parallel and a plurality of batten plates 1b welded between the two steel pipes 1a, the bottom ends of the two steel pipes 1a are both welded with a column bottom frustum 1c, and the bottoms of the two steel pipes 1a are both welded with a plurality of anti-shearing hoop plates 1 d; a pile reinforcement cage 2a is arranged in a pile hole of the concrete cast-in-place pile 2, the bottom of the double-steel-pipe upright post 1 extends into the pile hole, and concrete is cast in the pile hole to form the concrete cast-in-place pile 2, so that the double-steel-pipe upright post 1 is embedded into the concrete cast-in-place pile 2; sealing circular plates 1e are welded at the top ends of the two steel pipes 1a and are lengthened to be above the ground through the steel pipes 3 respectively.

Further, the steel pipe 1a is welded by a plurality of sectional steel pipes into an integral structure through the lining pipe 1 f.

Further, each layer of batten plates 1b is two in number, is located at the same height, and is welded to the front and rear sides of the two steel pipes 1a along the circumferential direction of the two steel pipes 1 a.

The invention has the following beneficial effects:

the invention is applied in the foundation pit construction, can save the construction period and the cost of the secondary construction of the basement structure, and simultaneously, because the stress of the column structure is strengthened, the section of the structural column can be reduced, the building space is correspondingly enlarged, one column has two functions, and the invention is more environment-friendly and economical than the traditional upright column, and has the advantages of simple structure, convenient installation and easy adjustment; the pile column is stable in structure, the pile column is formed in one step, the integral rigidity of the column is improved, and the design is novel, scientific and reasonable; the invention has two purposes by one column, saves repeated construction cost and construction period, ensures continuous operation and reduces construction cost; the invention meets the energy-saving requirement, realizes the maximum use of steel by utilizing the double steel pipe columns, and meets the principles of green, environmental protection and saving.

Drawings

FIG. 1 is a schematic structural view of a double-steel-pipe column in the present invention;

FIG. 2 is a schematic view showing the butt joint of steel pipes according to the present invention;

FIG. 3 is a schematic view of the bottom seal of the double steel tube column of the present invention;

FIG. 4 is a schematic view showing the connection between a double steel pipe column and a measure steel pipe according to the present invention;

FIG. 5 is a schematic view of the connection between the double steel tube columns and the cast-in-place concrete pile and the floor slab according to the present invention;

FIG. 6 is an installation schematic of the present invention;

in the figure: 1. a double steel tube column; 1a, a steel pipe; 1b, a batten plate; 1c, a column bottom frustum; 1d, shearing-resistant hoop; 1e, sealing the circular plate; 1f, lining a pipe; 2. pouring concrete into the pile; 2a, pile cages; 3. and (5) taking measures of steel pipes.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

As shown in fig. 1-6, a pile structure for a permanently-adjacent combined double-steel-pipe upright pile is suitable for combining an upright in a foundation pit with a structural column, the pile diameter of the upright pile is 2400mm, and the diameter of a pile body can be actually determined according to a project.

A pile structure for a permanently faced bonded double steel pipe stud pile, comprising: a double-steel-pipe upright post 1, a concrete cast-in-place pile 2 and a measure steel pipe 3.

The double-steel-pipe upright column 1 comprises two steel pipes 1a which are arranged in parallel and a plurality of batten plates 1b welded between the two steel pipes 1a, wherein the number of each batten plate 1b is two, the two batten plates are positioned at the same height, and the two batten plates are welded on the front side and the rear side of the two steel pipes 1a along the periphery of the two steel pipes 1a in a tangential direction; the thickness of the batten plate 1b is 20mm, the length is 450mm, the width is 300mm, and the layer distance is 2000 mm; the diameter of the steel pipe 1a is 800mm, the wall thickness is 35mm, and the steel pipe is made of Q390 material; the steel pipe 1a is an integral structure formed by welding a plurality of sectional steel pipes through a lining pipe 1f with the length of 300mm, and the outer diameter of the lining pipe 1f is 4mm smaller than the inner diameter of the steel pipe 1 a; the surface of the steel pipe 1a is derusted, the outer surface is coated with zinc-rich antirust paint, and pure cement slurry is brushed inside; the steel pipe 1a is hollow, the top end of the steel pipe is sealed by a sealing circular plate 1e with the thickness of 12mm, the steel pipe is lengthened to be above the ground by welding measure steel pipes 3, and a plurality of batten plates 1b are welded between the two measure steel pipes 3; arranging a C25 shear-resistant hoop 1d from the bottom end of the steel pipe 1a to the top section of the pile at intervals of 500 mm; the bottom end of the steel pipe 1a is welded with a column bottom frustum 1c, so that double steel pipes can be smoothly inserted and the buoyancy of the steel pipes in the slurry can be reduced; the pile hole of the concrete cast-in-place pile 2 is internally provided with a pile reinforcement cage 2a, the bottom of the double-steel-pipe upright 1 extends into the pile hole by 1.5m and is not directly connected with the pile reinforcement cage 2a, and the concrete is cast in the pile hole to form the concrete cast-in-place pile 2, so that the double-steel-pipe upright 1 is embedded into the concrete cast-in-place pile 2.

The invention is a permanent structural column, and in order to ensure the verticality of the column, measures of 800mm in diameter, 12mm in wall thickness and Q345B material are adopted to lengthen a double-steel-pipe column 3 by 1 to 3 meters above the ground, and the method is determined according to actual needs. The two measure steel pipes 3 are connected into a whole through the batten plate, the measure steel pipes 3 are in butt welding connection with the steel pipe 1a, and the upper parts of the measure steel pipes 3 are not sealed. When the steel pipe column is hoisted and placed in the hole, water needs to be injected into the steel pipe 3 to increase the self weight of the steel pipe column and avoid the steel pipe column from floating upwards.

When the device is used, after the double-steel-pipe stand column is drilled, the hole is cleaned, then the pile hole steel reinforcement cage is put into the pile hole, the adjustable positioning support is hoisted and fixed at the positioning support positioning angle point on a hardening site, the laser inclinometer is installed and fixed at the center line of the double-steel pipe, then the double-steel pipe is hoisted and put into the pile hole through the adjustable positioning support, and the inclination and the position of the double-steel-pipe stand column are adjusted by adopting a method of combining a real-time monitoring system and the straightening frame. The construction method includes the steps that steel pipes are firstly inserted for construction, concrete guide pipes are installed on the outer sides of the steel pipes for pouring pile body concrete, high-strength concrete in steel pipe columns is poured by a high-throwing method or a guide pipe method when first inner supports or a layer of basement structural slab is supported in construction after earth excavation, and the height of the double steel pipe columns needs to be about 2m higher than the slab surface so as to facilitate connection of upper structural columns. And when the structural column is constructed in the later stage, a reinforced concrete rectangular column of 200-250 mm is wrapped outside the double-steel-pipe upright column.

The invention can be used as a support upright post of the inner support plate and a structural post in the later period. After the supporting plates are completely finished in the foundation pit, the upper structure steel pipe column is in butt joint with the reserved steel pipe column through the lining pipe, the column reinforcement is connected with the reserved column reinforcement, then the column reinforcement is bound, column concrete is poured, and construction of the upper structure column is completed.

The sizes of the piles and columns can be adjusted according to project conditions, and the types and sizes of the components of each part in the embodiment are only used for reference.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a stake structure that is used for facing two steel pipe upright posts of combination forever, its characterized in that includes: a double-steel-pipe upright post (1), a concrete cast-in-place pile (2) and a measure steel pipe (3); the double-steel-pipe upright post (1) comprises two steel pipes (1a) which are arranged in parallel and a plurality of batten plates (1b) welded between the two steel pipes (1a), the bottom ends of the two steel pipes (1a) are welded with a post bottom frustum (1c), and a plurality of anti-shearing hoop rings (1d) are welded at the bottoms of the two steel pipes (1 a); pile reinforcement cages (2a) are arranged in pile holes of the concrete cast-in-place piles (2), the bottoms of the double-steel-pipe upright posts (1) extend into the pile holes, and concrete is cast in the pile holes to form the concrete cast-in-place piles (2), so that the double-steel-pipe upright posts (1) are embedded into the concrete cast-in-place piles (2); sealing circular plates (1e) are welded at the top ends of the two steel pipes (1a) and are lengthened to be above the ground through the steel pipes (3) which are welding measures respectively.

2. A pile structure for permanently joined double steel pipe vertical piles according to claim 1, wherein said steel pipes (1a) are welded into an integral structure by a plurality of segmented steel pipes through lining pipes (1 f).

3. The pile structure for a permanently joined double steel pipe stud according to claim 1, wherein each layer of gusset plates (1b) is two in number, is located at the same height, and is welded tangentially to both front and rear sides of the two steel pipes (1a) along the outer peripheries of the two steel pipes (1 a).