CN210368980U

CN210368980U - Earlier prop formula bracing strut supporting construction system

Info

Publication number: CN210368980U
Application number: CN201920858416.5U
Authority: CN
Inventors: 王才勇; 马世强; 方庆; 邵丽娟; 樊琛琛; 陈晓旭; 陈�胜; 刘雪珠
Original assignee: Jiangsu Geotechnical Engineering Co
Current assignee: Jiangsu Geotechnical Engineering Co
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-04-21
Anticipated expiration: 2029-06-10

Abstract

The utility model discloses an earlier prop formula bracing supporting construction system obtains reverse bracing power through inserting the bracing steel pipe in the bored concrete pile to can be under construction envelope and bracing system simultaneously, need not to stay soil at the foundation ditch excavation in-process and establish the bracing, bottom plate structure need not to establish the post-cast strip at bracing point position again, and the bracing steel pipe can partly retrieve, can shorten the period, saves the cost, convenient construction. Constructing a building envelope system; constructing an oblique cast-in-place pile, and inserting an oblique bracing steel pipe; constructing a crown beam, and connecting the upper end of the inclined strut steel pipe with the crown beam to form a whole; excavating earth to the bottom of the pit, pouring a bottom plate cushion layer, arranging a water stop steel plate at the position where the inclined strut steel pipe penetrates through the bottom plate and the outer wall, and constructing the bottom plate and the outer wall of the basement; after the top plate of the basement is constructed, cutting off the inclined strut steel pipe in sections; the oval steel plates are welded in the inclined strut steel pipes penetrating through the bottom plate and the outer wall, the expansion water stop strips are arranged, and finally, the holes are sealed by micro-expansion concrete with the same strength as the bottom plate, so that the defects of the traditional inclined strut structure system are overcome.

Description

Earlier prop formula bracing strut supporting construction system

Technical Field

The utility model relates to a building foundation structure especially relates to an earlier prop formula bracing supporting construction system.

Background

With the rapid development of economy in China, the pace of urbanization progress is accelerated, people continuously upgrade living environment, the land used in cities is greatly reduced, building engineering projects bloom all over the corners of the cities, more and more foundation pit engineering projects are provided, the number of supporting forms is relatively large, and under the condition that a certain foundation pit cantilever supporting structure cannot be met, the traditional supporting form considers adding transverse supports, inclined pull anchor cables or inclined throwing supports, the transverse supports are high in manufacturing cost and long in construction period, excavation of soil is difficult, the inclined pull anchor cables face the problem of a red line, the traditional inclined throwing support design condition has the following two defects that ① soil needs to be reserved at the pit edge for erecting the inclined throwing support, ② a post-cast strip needs to be reserved at the lower end of the inclined throwing support due to the fact that a bottom plate needs to be constructed firstly, ③ soil needs to be reserved at the pit edge for secondary digging, and the construction difficulty is large.

The utility model relates to an earlier prop formula bracing supporting construction, its characteristics are that can't implement in foundation ditch cantilever support, under the tighter condition of construction cycle, solve traditional horizontal or diagonal bracing and bring not enough and defect.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model discloses under the unable condition that satisfies to foundation ditch cantilever supporting construction, provided an earlier prop formula bracing supporting construction system, solved the not enough of traditional inclined throwing support design.

A pre-bracing type inclined strut supporting structure system comprises an enclosure structure (1), wherein the upper end of the enclosure structure (1) is connected with a crown beam (4); the crown beam (4) is connected with the upper end of the inclined strut steel pipe (3) to form a whole; the lower end of the diagonal bracing steel pipe (3) is inserted into the cast-in-place pile (2), and the diagonal bracing steel pipe (3) penetrates through the basement outer wall (8), the basement bottom plate (5) and the bottom plate cushion layer (6); the cast-in-place pile (2) is positioned below the bottom plate cushion layer (6); the basement bottom plate (5) is positioned above the bottom plate cushion layer (6), the basement bottom plate (5) is connected with the basement outer wall (8), and the upper part of the basement bottom plate is provided with a basement top plate (9);

waterproof structures are arranged at the inner positions of the penetrating basement outer wall (8) and the basement bottom plate (5) of the inclined strut steel pipe (3);

the waterproof structure includes: the water-stopping steel plate (7), the elliptical steel plate (10), the expansion water-stopping strip (11) and the micro-expansion concrete (12); the water stop steel plate (7) is welded outside the inclined strut steel pipe (3); the oval steel plate (10) is positioned in the inclined strut steel pipe (3) and is completely contacted with the inside of the inclined strut steel pipe (3), and the expansion water stop bar (11) is positioned on the inner side of the inclined strut steel pipe (3) and is arranged along the welding position of the oval steel plate (10) and the inclined strut steel pipe (3); the expansion water stop bar (11) is filled on all the surfaces of the welding position, and the micro-expansion concrete (12) is filled in the cut inclined strut steel pipe (3).

Has the advantages that: compared with the prior art, the utility model provides a pair of prop earlier formula bracing supporting construction system obtains reverse bracing power through inserting the bracing steel pipe in the bored concrete pile to can be under construction envelope and bracing system simultaneously, need not to stay soil at the excavation of foundation ditch in-process and establish the bracing, the floor structure need not to establish the post-cast strip at bracing point position again, and the bracing steel pipe can partly retrieve, has solved traditional not enough and the defect of throwing bracing supporting construction system in the past. The structure is not only simple and easy to operate, but also can save the construction period.

Drawings

FIG. 1 is a schematic view of a pre-bracing type bracing support structure system;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic view of a waterproof structure.

In the figure: 1. an enclosure structure; 2. filling piles; 3. bracing the steel pipe; 4. a crown beam; 5. a basement floor; 6. a bottom plate cushion layer; 7. a water stop steel plate; 8. a basement exterior wall; 9. a basement roof; 10. an oval steel plate; 11. an expansion water stop bar; 12. and (3) micro-expansion concrete.

Detailed Description

The present invention is further explained in detail with reference to the following embodiments, which are to be understood as illustrative only and not limiting the scope of the invention, and modifications of the various equivalent forms of the present invention by those skilled in the art after reading the present invention are within the scope of the appended claims.

As shown in fig. 1 and fig. 2, the utility model provides a bracing-type bracing structure system, wherein fig. 1 is the bracing-type bracing structure system, specifically, the bracing-type bracing structure system comprises a building enclosure (1), and the upper end of the building enclosure (1) is connected with a crown beam (4); the crown beam (4) is connected with the upper end of the inclined strut steel pipe (3) to form a whole; the lower end of the diagonal bracing steel pipe (3) is inserted into the cast-in-place pile (2), and the diagonal bracing steel pipe (3) penetrates through the basement outer wall (8), the basement bottom plate (5) and the bottom plate cushion layer (6); the cast-in-place pile (2) is positioned below the bottom plate cushion layer (6); the basement bottom plate (5) is positioned above the bottom plate cushion layer (6), the basement bottom plate (5) is connected with the basement outer wall (8), and the upper part of the basement bottom plate is provided with a basement top plate (9);

the inclined strut steel pipe (3) is provided with waterproof structures at the inner positions of the passing basement outer wall (8) and the basement bottom plate (5).

The waterproof structure includes: a water stop steel plate (7), an elliptical steel plate (10), an expansion water stop bar (11) and micro-expansion concrete (12).

The water stop steel plate (7) is welded outside the inclined strut steel pipe (3), and plays a role in cutting off a water permeation path and preventing underground water from permeating into the underground chamber; the oval steel plate (10) is positioned in the inclined strut steel pipe (3) and is completely contacted with the inner wall of the inclined strut steel pipe (3), and the expansion water stop bar (11) is positioned at the inner side of the inclined strut steel pipe (3) and is arranged along the welding position of the oval steel plate (10) and the inclined strut steel pipe (3); the expansion water stop bar (11) is filled on all surfaces of the welding position, if the expansion water stop bar meets water, expansion deformation of 2-3 times is generated, and meanwhile, huge contact pressure is generated, and leakage is further prevented. The micro-expansion concrete (12) is filled in the cut inclined strut steel pipe (3). The concrete can be expanded to a certain extent under the action of the expanding agent during hydration, and leakage is completely prevented.

Fig. 3 is a schematic view of the water proofing of the diagonal bracing steel pipe through the bottom plate, belonging to the enlarged node view of fig. 1. The method can solve the problems of the deficiency and the defect of the traditional inclined throwing support structure system.

The specific implementation steps are as follows: as shown in fig. 1, a building envelope 1 is constructed; constructing an inclined cast-in-place pile 2, and then inserting an inclined strut steel pipe 3; then constructing a crown beam 4, and connecting the upper end of the inclined strut steel pipe 3 with the crown beam 4 to form a whole; excavating earth to the bottom of the bottom plate cushion layer 6, and pouring the bottom plate cushion layer 6; a water stop steel plate 7 is arranged at the position where the inclined strut steel pipe 3 penetrates through the basement bottom plate 5 and the basement outer wall 8, and the basement bottom plate 5 and the basement outer wall 8 are constructed; after the top plate 9 of the basement is constructed, the diagonal bracing steel pipes 3 are cut off in sections; an oval steel plate 10 is welded in the inclined strut steel pipe 3 penetrating through the basement bottom plate 5 and the basement outer wall 8, an expansion water stop bar 11 is arranged along the welding position of the oval steel plate 10 and the inclined strut steel pipe 3, and finally, micro-expansion concrete 12 with the same structural strength is used for hole sealing, so that the defects of the traditional inclined strut structure system are overcome.

Claims

1. The utility model provides an earlier prop formula bracing supporting construction system which characterized in that: the building enclosure structure comprises an enclosure structure (1), wherein the upper end of the enclosure structure (1) is connected with a crown beam (4); the crown beam (4) is connected with the upper end of the inclined strut steel pipe (3) to form a whole; the lower end of the diagonal bracing steel pipe (3) is inserted into the cast-in-place pile (2), and the diagonal bracing steel pipe (3) penetrates through the basement outer wall (8), the basement bottom plate (5) and the bottom plate cushion layer (6); the cast-in-place pile (2) is positioned below the bottom plate cushion layer (6); the basement bottom plate (5) is positioned above the bottom plate cushion layer (6), the basement bottom plate (5) is connected with the basement outer wall (8), and the upper part of the basement bottom plate is provided with a basement top plate (9);

the waterproof structure includes: the water-stopping steel plate (7), the elliptical steel plate (10), the expansion water-stopping strip (11) and the micro-expansion concrete (12);

the water stop steel plate (7) is welded outside the inclined strut steel pipe (3); the oval steel plate (10) is positioned in the inclined strut steel pipe (3) and is completely contacted with the inner wall of the inclined strut steel pipe (3), and the expansion water stop bar (11) is positioned at the inner side of the inclined strut steel pipe (3) and is arranged along the welding position of the oval steel plate (10) and the inclined strut steel pipe (3); the expansion water stop bar (11) is filled on all the surfaces of the welding position, and the micro-expansion concrete (12) is filled in the cut inclined strut steel pipe (3).