Permanent supporting structure applied to foundation pit fat groove area

Abstract

The utility model discloses a permanent support structure applied to a foundation pit fertile groove area, which relates to the technical field of fertile groove backfilling, and comprises a foundation pit soil body, an underground building and a fertile groove area, a plurality of original support nails are inserted on a slope of the foundation pit soil body, and one end of each original support nail, which is positioned in the fertile groove area, is fixedly connected with a new support nail; a reinforcing structure is mounted on the outer side of a connecting point of the original supporting nail and the new supporting nail, the reinforcing structure comprises two limiting hoops, and a plurality of connecting rods are fixedly connected between the two limiting hoops; the interior of the fertilizer groove area is filled with a light filler; by reinforcing the connecting points of the original supporting nails and the new supporting nails, the problem that the connecting points of the original supporting nails and the new supporting nails are prone to fracture in the fertilizer groove backfilling process is solved, meanwhile, a temporary supporting structure in a fertilizer groove area is transformed and reinforced into a permanent supporting structure, and backfilling materials and the supporting structure form an integral structure; the surplus value of the supporting structure is fully exerted, and the possibility of settlement deformation of a fat groove area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fertilizer trough backfilling, and more specifically to a permanent supporting structure used in a fertilizer trough area of ​​a foundation pit. Background Art

[0002] In the process of foundation pit support, the backfill of the fertilizer trough area is generally backfilled with the original excavated soil, and then compacted layer by layer to the designed site elevation to harden the floor. However, most of the fertilizer troughs in foundation pit projects are strip-shaped, and generally have the characteristics of large depth and small width. The side walls of the soil nail wall foundation pit support are basically shotcrete surface layers. The backfill of the fertilizer trough area is manually spread and manually frog-type tamped, and its compaction requirements are greatly affected by the construction space and rolling methods. In general, the top of the fertilizer trough area backfill is the building scattered water and some municipal pipeline laying areas. The later settlement of the fertilizer trough will directly lead to uneven settlement of scattered water and deformation or rupture of the municipal pipeline network.

[0003] Therefore, in some fertilizer trough filling technologies, the original anchor rods or soil nails of the foundation pit support are extended and connected to the new backfill structure (taking patent CN214460451U as an example) so that the original temporary support structure can be converted into a permanent support structure. The original anchor rods or soil nails are generally extended by welding new anchor rods or soil nails, but the connection points after welding are prone to breakage during the fertilizer trough backfilling process, which affects the stability of the permanent support structure. Utility Model Content

[0004] The purpose of the utility model is: in order to solve the above-mentioned technical problems, the utility model provides a permanent support structure used in the fertilizer trough area of ​​the foundation pit, which can extend the original support structure, enhance the stability of the extended structure, and reduce the possibility of settlement and deformation in the fertilizer trough area.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions: a permanent support structure used in the fertilizer trough area of ​​a foundation pit, including a foundation pit soil body, an underground building and a fertilizer trough area, a plurality of original support nails are inserted on the slope of the foundation pit soil body, and a new support nail is fixedly connected to one end of the original support nail located inside the fertilizer trough area; a reinforcement structure is installed on the outer side of the connection point between the original support nail and the new support nail, and the reinforcement structure includes two limit hoops, which are respectively located on the outer sides of the original support nail and the new support nail, and a plurality of connecting rods are fixedly connected between the two limit hoops; the interior of the fertilizer trough area is filled with lightweight filler.

[0006] In order to facilitate the fixing of the limiting hoop on the outside of the supporting nails, as a preferred permanent supporting structure of the utility model used in the fertilizer trough area of ​​the foundation pit, the limiting hoop includes two semi-annular cavities, the outsides of the two semi-annular cavities are provided with openings, the insides of the two semi-annular cavities are fixedly connected with flexible strips, the two flexible strips are respectively connected through the two openings, the outsides of the two flexible strips are provided with strip holes, and the outsides of the two semi-annular cavities are fixedly connected with multiple limiting blocks.

[0007] In order to make the reinforcement structure adapt to support nails with different connection point lengths, as a preferred permanent support structure used in the fertilizer trough area of ​​the foundation pit of the utility model, several of the connecting rods all adopt retractable rod bodies.

[0008] In order to further increase the stability of the reinforcement structure, as a preferred permanent support structure used in the fertilizer trough area of ​​the foundation pit of the utility model, the reinforcement structure also includes a plurality of reinforcement plates, and the plurality of reinforcement plates are fixedly connected to the limiting hoops close to the foundation pit soil, and the plurality of reinforcement plates are penetrated by reinforcement nails, and one end of the plurality of reinforcement nails extends through and into the interior of the foundation pit soil.

[0009] In order to enhance the adhesion between the filler and the support nails, as a preferred permanent support structure used in the fertilizer trough area of ​​the foundation pit of the utility model, the lightweight filler is made of foam concrete material.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1. The original support nail and the new support nail are fixedly connected, and the other end of the connected new support nail is fixedly connected to the underground building. Two limit hoops are respectively installed on the outside of the original support nail and the new support nail and clamped, and then the two limit hoops are connected and supported by a number of connecting rods, so as to achieve a reinforcement effect on the connection point of the original support nail and the new support nail;

[0012] 2. A plurality of reinforcing plates and reinforcing nails are fixed to the outside of one of the limiting hoops. After installing the two limiting hoops, a plurality of reinforcing nails are driven into the foundation pit soil, and then the limiting hoops and the foundation pit soil are fixed by the reinforcing nails, thereby achieving the effect of stabilizing the overall reinforcement structure;

[0013] 3. After installing the reinforcement structure on the outside of the original support nails and the new support nails, fill the lightweight filler of the foam concrete material into the fertilizer trough area. The foam concrete has the characteristics of light weight, good stability and convenient construction. The foam concrete is in a stable state after solidification, and through the combination of new and old support structures, the pressure of the foundation pit soil on the underground building can be greatly reduced.

[0014] To sum up, the utility model solves the problem that the connection points between the original support nails and the new support nails are prone to breakage during the backfilling process of the fertilizer trough. At the same time, the temporary support structure in the fertilizer trough area is transformed and reinforced into a permanent support structure, and the backfill material and the support structure form an integral structure, which fully utilizes the residual value of the support structure and reduces the possibility of settlement and deformation in the fertilizer trough area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 Schematic diagram of point A;

[0017] Figure 3 It is a front view of the reinforcement structure of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the limiting hoop of the utility model.

[0019] Figure numerals: 1. foundation pit soil; 2. underground buildings; 3. fertilizer trough area; 301. lightweight filler; 4. original support nails; 5. new support nails; 6. reinforcement structure; 7. limiting hoop; 701. semi-annular cavity; 7011. opening; 702. flexible strip; 7021. strip hole; 703. limiting block; 8. connecting rod; 9. reinforcing plate; 901. reinforcing nail. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] See also Figure 1-4The utility model provides the following technical solutions: a permanent support structure used in the fertilizer trough area of ​​a foundation pit, comprising a foundation pit soil body 1, an underground building 2 and a fertilizer trough area 3, a plurality of original support nails 4 are inserted on the slope of the foundation pit soil body 1, and a new support nail 5 is fixedly connected to one end of the original support nail 4 located inside the fertilizer trough area 3; a reinforcement structure 6 is installed on the outer side of the connection point between the original support nail 4 and the new support nail 5, and the reinforcement structure 6 includes two limiting hoops 7, and a plurality of connecting rods 8 are fixedly connected between the two limiting hoops 7; the interior of the fertilizer trough area 3 is filled with a lightweight filler 301, and the lightweight filler 301 adopts a foam concrete material.

[0023] In this embodiment: (support nails include soil nails, steel pipes, steel bars, etc.) the original support nail 4 and the new support nail 5 are fixedly connected, and the other end of the connected new support nail 5 is fixedly connected to the underground building 2. Two limit hoops 7 are respectively installed on the outside of the original support nail 4 and the new support nail 5 and clamped, and then a plurality of connecting rods 8 are used to connect and support the two limit hoops 7, so as to achieve the reinforcement effect on the connection point of the original support nail 4 and the new support nail 5. After installing the reinforcement structure 6, the lightweight filler 301 of the foam concrete material is filled into the fertilizer trough area 3. The foam concrete is in a stable state after solidification, and the pressure of the foundation pit soil 1 on the underground building can be greatly reduced by combining the new and old support structures.

[0024] As a technical optimization scheme of the utility model, the limiting hoop 7 includes two semi-annular cavities 701, and openings 7011 are provided on the outer sides of the two semi-annular cavities 701. Flexible strips 702 are fixedly connected to the interior of the two semi-annular cavities 701. The two flexible strips 702 are respectively connected through the two openings 7011. Strip holes 7021 are provided on the outer sides of the two flexible strips 702. Multiple limiting blocks 703 are fixedly connected to the outer sides of the two semi-annular cavities 701.

[0025] In this embodiment: when installing the limiting hoop 7, the two semi-annular cavities 701 surround the supporting nails, and the two flexible strips 702 are pulled in opposite directions. The front flexible strip 702 is pulled to make its strip hole 7021 engage with the limiting block 703 on the outside of the right semi-annular cavity 701, and then the rear flexible strip 702 is pulled to engage with the limiting block 703 on the outside of the left semi-annular cavity 701, thereby clamping the limiting hoop 7 on the outside of the supporting nail.

[0026] As a technical optimization solution of the present invention, the plurality of connecting rods 8 all adopt telescopic rod bodies.

[0027] In this embodiment: by setting the connecting rod 8 as a retractable structure, when the connection section of the original supporting nail 4 and the new supporting nail 5 is shorter or longer (the connection method of the two supporting nails can be welding, threaded connection, etc.), the retractable connecting rod 8 can be adjusted to adapt to the supporting nail connection sections of different sizes.

[0028] As a technical optimization solution of the utility model, the reinforcement structure 6 also includes a plurality of reinforcing plates 9, and the plurality of reinforcing plates 9 are fixedly connected to the limiting hoop 7 close to the foundation pit soil 1. The plurality of reinforcing plates 9 are penetrated by reinforcing nails 901, and one end of the plurality of reinforcing nails 901 extends through and into the interior of the foundation pit soil 1.

[0029] In this embodiment: a plurality of reinforcing plates 9 and reinforcing nails 901 are fixed to the outside of one of the limiting hoops 7. After installing the two limiting hoops 7, a plurality of reinforcing nails 901 are nailed into the foundation pit soil 1, and then the limiting hoop 7 and the foundation pit soil 1 are fixed by the reinforcing nails 901, thereby achieving the effect of stabilizing the overall reinforcement structure.

[0030] The working principle and use process of the utility model are as follows: the original support nail 4 is fixedly connected to the new support nail 5, and the other end of the connected new support nail 5 is fixedly connected to the underground building 2. By installing two limiting hoops 7 on the outside of the original support nail 4 and the new support nail 5 and clamping them, when the limiting hoops 7 are installed, the two semi-annular cavities 701 surround the support nails, and the two flexible strips 702 are pulled in opposite directions, and the front flexible strip 702 is pulled so that its strip hole 7021 is aligned with the right semi-annular cavity 701. The outer limiting block 703 is sleeved, and then the rear flexible strip 702 is pulled to sleeve with the limiting block 703 on the outer side of the left semi-circular cavity 701, so that the limiting hoop 7 is stuck on the outside of the supporting nail. After installing the two limiting hoops 7, several reinforcing nails 901 are nailed into the foundation pit soil 1, and then the limiting hoop 7 and the foundation pit soil 1 are fixed by the reinforcing nails 901. After installing the reinforcement structure 6, the lightweight filler 301 of the foam concrete material is filled into the fertilizer trough area 3, thereby completing the backfilling work of the fertilizer trough area.

[0031] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A permanent support structure used in a foundation pit fertilizer trough area, comprising a foundation pit soil body (1), an underground building (2) and a fertilizer trough area (3), wherein a plurality of original support nails (4) are inserted into the slope of the foundation pit soil body (1), and characterized in that: One end of the original support nail (4) located inside the fat trough area (3) is fixedly connected to a new support nail (5); a reinforcement structure (6) is installed on the outside of the connection point between the original support nail (4) and the new support nail (5), and the reinforcement structure (6) includes two limit hoops (7), the two limit hoops (7) are respectively located on the outside of the original support nail (4) and the new support nail (5), and a plurality of connecting rods (8) are fixedly connected between the two limit hoops (7); the inside of the fat trough area (3) is filled with lightweight filler (301).

2. A permanent support structure used in the fertilizer tank area of ​​a foundation pit according to claim 1, characterized in that: The limiting hoop (7) comprises two semi-annular cavities (701), each of which is provided with an opening (7011) on the outside, each of which is fixedly connected with a flexible strip (702) in the cavity of each of the two semi-annular cavities (701), each of which is respectively connected through the two openings (7011), each of which is provided with a strip-shaped hole (7021), and each of which is fixedly connected with a plurality of limiting blocks (703) on the outside of each of the two semi-annular cavities (701).

3. A permanent support structure used in the fertilizer tank area of ​​a foundation pit according to claim 1, characterized in that: The plurality of connecting rods (8) all adopt telescopic rod bodies.

4. A permanent support structure used in a foundation pit fertilizer tank area according to claim 1, characterized in that: The reinforcement structure (6) further comprises a plurality of reinforcement plates (9), each of which is fixedly connected to a limiting hoop (7) close to the foundation pit soil (1), and each of the reinforcement plates (9) is penetrated by a reinforcement nail (901), and one end of each of the reinforcement nails (901) extends through the interior of the foundation pit soil (1).

5. A permanent support structure used in a foundation pit fertilizer tank area according to claim 1, characterized in that: The lightweight filler (301) is made of foamed concrete material.

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