A pile-column structure of double steel pipe column piles for permanent and temporary combination

Abstract

The present invention discloses a pile column structure for a double steel pipe column pile for permanent and temporary combination, comprising: a double steel pipe column, a concrete pile and a measure steel pipe; the double steel pipe column comprises two steel pipes arranged in parallel and a plurality of tie plates welded between the two steel pipes, the bottom ends of the two steel pipes are welded with a column bottom cone, and the bottoms of the two steel pipes are welded with a plurality of shear hoops; a pile steel cage is arranged in the pile hole of the concrete pile, the bottom of the double steel pipe column goes deep into the pile hole, and concrete is poured in the pile hole to form a concrete pile, so that the double steel pipe column is embedded in the concrete pile; the top ends of the two steel pipes are welded with sealing circular plates, and they are respectively extended to above the ground by welding the measure steel pipes. The present invention has a column for two purposes, which is more environmentally friendly and economical than the traditional column pile, and has the advantages of simple structure, convenient installation and easy adjustment.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering construction, and in particular provides a pile-column structure of double steel pipe column piles for permanent and temporary combination. Background Art

[0002] In the traditional ultra-high-rise deep foundation pit construction, column piles are one of the most critical control items. Usually, the column piles are in the form of lattice columns or single steel pipe columns, and their structural stress is limited. They are either used as temporary columns or as small structural columns for basements and podiums. The structure needs to be greatly strengthened, otherwise it will be difficult to meet the stress requirements of the tower structural columns.

[0003] In addition, due to the stress characteristics of super-high-rise structures, the cross-sectional dimensions of tower columns are usually large, and when steel-concrete columns are used, the forward construction method is usually adopted. The reverse construction method is difficult to ensure its forming quality. Summary of the invention

[0004] The object of the present invention is to provide a pile-column structure of double steel pipe column piles for permanent and temporary combination, which can be used as both a supporting column and a permanent structural column, and can effectively solve the above-mentioned problems.

[0005] The technical solution of the present invention is: a pile-column structure of a double steel tube column pile for permanent and temporary combination, comprising: a double steel tube column 1, a concrete pile 2 and a measure steel pipe 3; the double steel tube column 1 comprises two steel pipes 1a arranged in parallel and a plurality of connecting plates 1b welded between the two steel pipes 1a, the bottom ends of the two steel pipes 1a are welded with a column bottom cone 1c, and the bottoms of the two steel pipes 1a are welded with a plurality of shear hoops 1d; a pile steel cage 2a is arranged in the pile hole of the concrete pile 2, the bottom of the double steel tube column 1 is penetrated into the pile hole, and concrete is poured in the pile hole to form a concrete pile 2, so that the double steel tube column 1 is embedded in the concrete pile 2; the top ends of the two steel pipes 1a are welded with sealing circular plates 1e, and they are respectively extended to above the ground by welding the measure steel pipes 3.

[0006] Furthermore, the steel pipe 1a is formed into an integral structure by welding a plurality of segmented steel pipes through an inner liner pipe 1f.

[0007] Furthermore, the number of each layer of the gusset plates 1b is two, which are located at the same height and are tangentially welded to the front and rear sides of the two steel pipes 1a along the outer circumference of the two steel pipes 1a.

[0008] The present invention has the following beneficial effects:

[0009] The present invention is applied in foundation pit construction, which can save the construction period and cost of secondary construction of basement structure. At the same time, since the stress on the column structure is strengthened, the cross-section of the structural column can be reduced, and the building space is correspondingly increased. One column serves two purposes, which is more environmentally friendly and economical than traditional column piles, and has the advantages of simple structure, convenient installation and easy adjustment. The present invention has a stable structure, and the pile column is formed at one time, which improves the overall rigidity of the column, and the design is novel, scientific and reasonable. The present invention has one column serving two purposes, which saves repeated construction costs and construction period, makes the operation continuous, and reduces construction costs. The present invention meets the energy-saving requirements, and through the use of double steel pipe columns, the maximum use of steel is achieved, which meets the principles of green, environmental protection and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the double steel tube column in the present invention;

[0011] Figure 2 It is a schematic diagram of the butt connection of the steel pipes in the present invention;

[0012] Figure 3 This is a schematic diagram of sealing the bottom end of the double steel pipe column in the present invention;

[0013] Figure 4 It is a schematic diagram of the connection between the double steel pipe column and the measure steel pipe in the present invention;

[0014] Figure 5 This is a schematic diagram of the connection between the double steel tube columns, concrete cast-in-place piles and floor slabs in the present invention;

[0015] Figure 6 This is a schematic diagram of the installation of the present invention;

[0016] In the figure: 1. Double steel pipe column; 1a. Steel pipe; 1b. Tie plate; 1c. Column bottom cone; 1d. Shear hoop; 1e. Sealing circular plate; 1f. Lining pipe; 2. Concrete cast-in-place pile; 2a. Pile reinforcement cage; 3. Measure steel pipe. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-6 As shown, a pile-column structure of double steel pipe column piles used for permanent and temporary combination is suitable for the combination of columns and structural columns in foundation pits. The diameter of the column pile is 2400mm, and the pile body diameter can be determined according to the actual project.

[0019] A pile-column structure of a double steel tube column pile for permanent and temporary combination comprises: a double steel tube column 1, a concrete cast-in-place pile 2 and a measure steel pipe 3.

[0020] The double steel pipe column 1 includes two parallel arranged steel pipes 1a and a plurality of gussets 1b welded between the two steel pipes 1a. Each layer of gussets 1b has two gussets 1b located at the same height and tangentially welded to the front and rear sides of the two steel pipes 1a along the outer periphery of the two steel pipes 1a. The gussets 1b are 20mm thick, 450mm long, 300mm wide, and 2000mm apart. The steel pipe 1a has a diameter of 800mm, a wall thickness of 35mm, and is made of Q390 material. The steel pipe 1a is welded into an integral structure by a plurality of segmented steel pipes through an inner liner 1f with a length of 300mm. The outer diameter of the inner liner 1f is 4mm smaller than the inner diameter of the steel pipe 1a. The surface of the steel pipe 1a is derusted, the outer surface is coated with zinc-rich anti-rust paint, and the inside is brushed with pure cement slurry. The inside of the tube 1a is hollow, and the top is sealed by a 12mm thick sealing circular plate 1e, and it is extended to above the ground by welding a measure steel pipe 3, and multiple connecting plates 1b are welded between the two measure steel pipes 3; a C25 shear hoop 1d is set every 500mm from the bottom end of the steel pipe 1a to the pile top section; a column bottom cone 1c is welded at the bottom end of the steel pipe 1a to facilitate the smooth insertion of the double steel pipes and reduce the buoyancy of the steel pipes in the mud; a pile reinforcement cage 2a is set in the pile hole of the concrete bored pile 2, and the bottom of the double steel pipe column 1 penetrates 1.5m into the pile hole and is not directly connected to the pile reinforcement cage 2a, and concrete is poured in the pile hole to form a concrete bored pile 2, so that the double steel pipe column 1 is embedded in the concrete bored pile 2.

[0021] The present invention is a permanent structural column. To ensure the verticality of the column, a Q345B steel pipe 3 with a diameter of 800 mm and a wall thickness of 12 mm is used to extend the double steel pipe column 1 to 3 meters above the ground. The specific length is determined according to actual needs. The two steel pipes 3 are connected to form a whole through a tie plate. The steel pipe 3 is welded to the steel pipe 1a, and the upper part of the steel pipe 3 is not sealed. When hoisting into the hole, water needs to be injected into the steel pipe 3 to increase the deadweight of the steel pipe column and prevent it from floating.

[0022] When in use, first complete the drilling of the double steel pipe column, clean the hole and then lower the pile hole steel cage, hoist the adjustable positioning bracket and fix it on the positioning angle point of the positioning bracket on the hardened site, install and fix the laser inclinometer at the center line of the double steel pipe, then hoist the double steel pipe through the adjustable positioning bracket and lower it into the pile hole, and use the real-time monitoring system and the straightening frame to adjust the inclination and position of the double steel pipe column. The steel pipe is inserted first, and the concrete conduit is installed on the outside of the steel pipe to cast the pile body concrete. The high-strength concrete in the steel pipe column is cast by the high-throw method or the conduit method when the first internal support or the negative basement structure slab is constructed after the earthwork is excavated. The double steel pipe column needs to be about 2m higher than the slab surface to facilitate the connection of the upper structure column. During the later structural column construction, the double steel pipe column is then wrapped with a 200-250mm reinforced concrete rectangular column.

[0023] The present invention is used as a supporting column of the inner support plate and later as a structural column. After the support plate in the foundation pit is completed, the upper structure steel pipe column is connected with the reserved steel pipe column through the inner lining pipe, the column reinforcement is connected with the reserved column reinforcement, and then the column reinforcement is tied and the column concrete is poured to complete the construction of the upper structure column.

[0024] The dimensions of the piles and columns in the present invention can also be adjusted according to the project conditions. The models and dimensions of the components of the components in this embodiment are for reference only.

[0025] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A double steel pipe column pile structure for permanent and temporary combination, characterized in that: include: A double steel tube column (1), a concrete cast-in-place pile (2) and a measure steel tube (3); the double steel tube column (1) comprises two parallel arranged steel tubes (1a) and a plurality of gussets (1b); the plurality of gussets (1b) are welded between the two steel tubes (1a); the bottom ends of the two steel tubes (1a) are welded with a column bottom cone (1c); the bottoms of the two steel tubes (1a) are welded with a plurality of shear hoops (1d); a pile steel cage (2a) is arranged in the pile hole of the concrete cast-in-place pile (2); the bottom of the double steel tube column (1) is extended into the pile hole, and concrete is poured into the pile hole to form a concrete cast-in-place pile (2), so that the double steel tube column The column (1) is embedded in a concrete cast-in-place pile (2); the tops of the two steel pipes (1a) are welded with sealing circular plates (1e), and the steel pipes (1a) are extended above the ground by welding a measure steel pipe (3); the steel pipe (1a) is welded into an integral structure by a plurality of segmented steel pipes through an inner lining pipe (1f); the number of each layer of the gusset plates (1b) is two, which are located at the same height and are tangentially welded to the front and rear sides of the two steel pipes (1a) along the outer circumference of the two steel pipes (1a); the upper part of the measure steel pipe (3) is not sealed, and water needs to be injected into the measure steel pipe (3) when it is hoisted into the hole to increase the deadweight of the steel pipe column and prevent it from floating.

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