CN211523228U

CN211523228U - Foundation pit supporting structure with shaped steel slant internal stay

Info

Publication number: CN211523228U
Application number: CN201922295157.2U
Authority: CN
Inventors: 毕平均; 胡廖琪; 许绮炎; 杨林
Original assignee: Shanghai Qiangjin Foundation Engineering Co Ltd
Current assignee: Shanghai Qiangjin Foundation Engineering Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-18
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a foundation ditch supporting construction with shaped steel slant internal stay, the foundation ditch is provided with the fender pile all around, and the fender pile top is provided with the capping beam, the capping beam is connected with the bracing that is located the foundation ditch inboard, the bracing is shaped steel structure or shaped steel and steel pipe integrated configuration, and the bracing structure inserts in the high-pressure jet grouting pile below the hole bottom. The bracing of this scheme provides the support counter-force as the depression bar, can realize the vertical excavation of earthwork under the condition that does not set up horizontal interior support, and it is more convenient to dig, has saved the period of a project of digging, has good economic benefits.

Description

Foundation pit supporting structure with shaped steel slant internal stay

Technical Field

The utility model relates to a civil engineering technical field is an excavation supporting construction with shaped steel slant internal stay particularly.

Background

At present, the domestic existing related processes mainly comprise: grouting steel pipe front support, anchor rope back-pulling HU type enclosure structures (the enclosure structures comprise a top ring beam, H-shaped steel, U-shaped steel sheet piles, a group of steel pipes and a group of anchor ropes), soft soil foundation pit slope-making type recyclable steel enclosure structures (the enclosure structures comprise a top pressing plate and at least three groups of steel pipes), lattice steel member-bag combined inclined support foundation pit supporting structures (the supporting structures comprise lattice steel members and grouting bags). The processes are applied to actual engineering and achieve good effects.

The existing related processes are innovative, but the coordination problems of economy, safety and construction convenience are not well solved. The strength of the enclosure structure is weakened due to a relatively economic support form, for example, the construction convenience of the water-stopping steel sheet is low when the steel pipes pass through the bottom plate in the processes; although the built-in grouting bag of the lattice type steel member has high safety and good water-stopping steel sheet effect penetrating through the bottom plate, the steel lattice column has large processing amount, complex construction and large material waste.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the problem that exists among the prior art is overcome, a foundation ditch supporting construction with shaped steel slant internal stay is provided.

In order to achieve the purpose, the technical scheme adopted by the patent is as follows:

the utility model provides a foundation ditch supporting construction with shaped steel slant internal stay, the foundation ditch is provided with the fender pile all around, and the fender pile top is provided with the capping beam, the capping beam is connected with the bracing that is located the foundation ditch inboard, the bracing is the shaped steel structure.

The section steel is in a multi-section shape, and the multi-section steel is in butt joint and is long.

And (4) welding the multi-section steel in a butt joint mode, and arranging a reinforcing steel plate outside a welding seam.

And a pressing plate is welded on the outer side of the section steel at the bottom of the capping beam.

And welding a pressing plate on the outer side of the profile steel at the bottom of the foundation pit.

The section steel is inserted in a hole guiding mode, and the hole guiding mode is an oblique high-pressure jet grouting pile hole guiding mode.

The profile steel is directly inserted into the bottom of the foundation pit in an inclined mode.

The fender pile top is provided with the capping beam, the capping beam is connected with the bracing that is located the foundation ditch inboard, the bracing is shaped steel and steel pipe integrated configuration, is the shaped steel structure above the pit bottom, is the steel pipe below the pit bottom.

The end face of the steel pipe at the butt joint of the profile steel and the steel pipe is provided with a splice plate which is a steel plate, the steel plate is welded on the end face of the steel pipe, the profile steel is perpendicular to the steel plate and is welded with the steel plate, and the butt joint of the profile steel and the steel plate is provided with a stiffening plate which is respectively welded with the profile steel and the steel plate.

And the side wall of the profile steel is provided with a grouting pipe, and the grouting pipe penetrates through the butt joint surface of the profile steel and the steel pipe and extends to the bottom of the steel pipe.

The section steel can be lengthened according to the requirement.

The steel pipe can be lengthened as required.

Has the advantages that: have shaped steel slant internal stay underground structure, the bracing of this scheme provides the support counter-force as the depression bar, can realize the perpendicular excavation of earthwork under the condition that does not set up the horizontal interior support, it is more convenient to dig, has saved the period of a project of digging, has good economic benefits. The inner inserted inclined strut is formed by a section steel or a combined structure of the section steel and a steel pipe, and has high structural strength; the construction method is simple and can be achieved by oblique insertion. The process adopts the open type profile steel inclined strut, the resistance is small when the profile steel inclined strut is obliquely inserted into the soil layer, and the construction difficulty is small; the water-stopping steel sheet passing through the bottom plate is easy to weld, the construction difficulty is low, the water-stopping effect is good, and the market application prospect is very good.

Drawings

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Fig. 1 is the utility model discloses embodiment 1 shaped steel slant internal stay underground structure sketch.

FIG. 2 is a schematic view of the butt joint side joint face of the section steel.

FIG. 3 is a schematic diagram of a butt-joint cross-section structure of square steel.

FIG. 4 is a schematic structural diagram of the pit bottom position of the inclined strut of the section steel.

FIG. 5 is a schematic diagram of a steel section and steel pipe splicing inclined strut structure.

FIG. 6 is a schematic structural view of the section steel side at the butt joint of the section steel and the steel pipe.

FIG. 7 is a schematic diagram of the steel pipe side structure of the butt joint of the section steel and the steel pipe.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Examples 1-4 referring to fig. 1, the diagonal brace is a section steel structure, typically an H-section steel 1, and is first drilled diagonally to the level of the bottom of the diagonal brace using a high pressure jet grouting pile, and then inserted into the H-section steel. The top of the section steel 1 is connected with a capping beam or a crown beam 2, and the capping beam or the crown beam 2 is positioned at the top of the foundation pit fender pile. The other end of the section steel 1 is obliquely inserted into a pre-constructed pit bottom jet grouting pile.

Referring to fig. 1-4, the top of the section steel 1 is connected with a capping beam 2, the outer side of the part of the top of the section steel connected with the capping beam is provided with spine-shaped short steel bars 11, the concrete structure of the capping beam 2 is internally provided with reinforcing bars, and the top of the section steel 1 can be firmly fixed in the capping beam 2 through the spine-shaped short steel bars. Further set up welding clamp plate 12 on 2 bottom position shaped steel 1 of capping beam, clamp plate 12 further fixes shaped steel 1 and capping beam 2, prevents shaped steel 1 axial displacement, guarantees that the foundation ditch is indeformable.

Referring to fig. 2-3, the section steel 1 is in a multi-section shape, and the multi-section steel is in butt joint and long. And the multi-section steel is welded in a butt joint mode, and a reinforcing steel plate 13 is arranged on the outer side of a welding seam.

Referring to fig. 4, a pressing plate 14 is arranged on the profile steel 1 at the bottom of the foundation pit, so that the steel pipe is fixed relative to the soil layer below the bottom plate. And shaped steel still is provided with stagnant water steel sheet 15 in basement bottom plate thickness scope, prevents that groundwater from oozing from the shaped steel gap.

In example 2, referring to fig. 5, the inclined strut structure is formed by combining section steel 1 and steel pipes 4, and a high-pressure jet grouting pile is firstly adopted to lead holes to the bottom elevation position of the inclined strut, and then the inclined strut structure is inserted. The section steel 1 is located above the bottom surface of the foundation pit, the steel pipe 4 is located below the bottom surface of the foundation pit, one end of the section steel is in butt joint with the steel pipe, and the other end of the section steel is connected with the capping beam or the crown beam 3. The capping beam or the crown beam 3 is positioned at the top of the foundation pit fender pile.

The profile steel 1 is arranged above the pit bottom, so that the weight is light, the strength is high, and the hoisting, the recovery and the cutting are convenient; the steel pipe 1 is arranged below the pit bottom, the combination strength is high, and the generated side resistance and end resistance are large.

Referring to fig. 6-7, the end face of the steel pipe at the butt joint of the section steel 1 and the steel pipe 4 is provided with a splice plate 41, the splice plate is a square steel plate 41, the square steel plate 41 is welded on the end face of the steel pipe 4, the section steel 1 is perpendicular to and welded with the square steel plate 41, the butt joint of the section steel and the square steel plate is provided with a stiffening plate 42, and the stiffening plate 42 is respectively welded with the section steel 1 and the square steel plate 41.

The side wall of the section steel 1 is provided with a grouting pipe 5, and the grouting pipe 5 penetrates through the butt joint surface of the section steel 1 and the steel pipe 4 and extends to the bottom of the steel pipe. After the inclined strut is inserted, grouting is conducted on the pile bottom through the grouting pipe, and bearing capacity is improved.

Referring to fig. 5, a pressing plate 14 is arranged on the steel pipe 4 at the bottom position of the foundation pit, so that the steel pipe is fixed relative to the soil layer below the bottom plate. And the section steel 1 is also provided with a water stop steel plate 15 at the position to prevent groundwater from seeping out from gaps of the section steel.

The rest is the same as example 1.

The scheme is innovated on the basis of the prior supporting technology, reduces the construction cost and the construction difficulty, reduces the waste of materials, and makes the related technology step forward to the advanced, safe and economic direction.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A foundation pit supporting structure with a profile steel inclined inner support is characterized in that a fender pile is arranged around a foundation pit, a capping beam is arranged at the top of the fender pile, and the capping beam is connected with an inclined support positioned on the inner side of the foundation pit; the section steel is in a multi-section shape, and the multi-section steel is in butt joint and is long.

2. The foundation pit supporting structure with the steel section oblique inner support according to claim 1, wherein the multiple sections of the steel sections are butt-welded, and a reinforcing steel plate is arranged outside a welding seam.

3. The foundation pit supporting structure with the steel section inclined inner support is characterized in that a pressing plate is welded on the outer side of the steel section at the position of the bottom of the foundation pit.

4. The foundation pit supporting structure with the steel section inclined inner support is characterized in that the steel section is inserted through a guide hole, and the guide hole is an inclined high-pressure jet grouting pile guide hole.

5. The supporting structure of foundation pit with the oblique inner bracing of shaped steel of claim 1, wherein the shaped steel is directly inserted obliquely into the bottom of foundation pit.

6. The utility model provides a foundation ditch supporting construction with shaped steel slant internal stay, the foundation ditch is provided with the fender pile all around, and the fender pile top is provided with the capping beam, the capping beam is connected with the bracing that is located the foundation ditch inboard, its characterized in that, the bracing is shaped steel and steel pipe integrated configuration, is the shaped steel structure above the pit bottom, is the steel pipe below the pit bottom.

7. The foundation pit supporting structure with the steel section oblique inner support is characterized in that a splice plate is arranged on the end face of the steel pipe at the joint of the steel section and the steel pipe, the splice plate is a steel plate, the steel plate is welded on the end face of the steel pipe, the steel section is perpendicular to and welded with the steel plate, a stiffening plate is arranged at the joint of the steel section and the steel plate, and the stiffening plate is welded with the steel section and the steel plate respectively.

8. The supporting structure of foundation pit with steel section inclined inner support according to claim 6, wherein the side wall of the steel section is provided with grouting pipes, and the grouting pipes penetrate through the butt joint surface of the steel section and the steel pipe and extend to the bottom of the steel pipe.

9. The foundation pit supporting structure with the steel inclined inner support is characterized in that the steel pipe is a circular steel pipe.

10. The foundation pit supporting structure with the steel inclined inner support is characterized in that the steel pipe is a square steel pipe.

11. The foundation pit supporting structure with the steel section inclined inner support is characterized in that the steel section can be lengthened as required.

12. The foundation pit supporting structure with the steel inclined inner support is characterized in that the steel pipe can be lengthened as required.