CN210827422U - Peripheral shallow structure foundation reinforced structure that buries of deep basal pit - Google Patents

Abstract

The utility model discloses a foundation reinforcement structure of shallow buried structures around a deep foundation pit, comprising an anti-overturning plate, a grouting steel pipe and a fixed steel plate. The slurry steel pipe is arranged in a plum blossom shape around the existing foundation and is connected with the anti-overturning plate steel skeleton after being fixed by the fixed steel plate. Expand the bearing capacity and stability of the existing foundation, and at the same time have the characteristics of fast construction and good economic benefits.

Description

A kind of foundation reinforcement structure of shallow buried structures around deep foundation pit

technical field

The utility model belongs to the technical field of foundation reinforcement of construction engineering, in particular to a foundation reinforcement structure of shallow buried structures around a deep foundation pit.

Background technique

With the development of urbanization, the surrounding environment of the engineering construction site is becoming more and more complex. During the excavation of the deep foundation pit, the existing stratum will inevitably be disturbed, which will cause the deformation of the foundation pit and the displacement of the soil around the foundation pit. The safety of the buildings is affected, especially the important structures around the foundation pit, which have extremely strict requirements on the stability of the foundation. It is easy to cause the structures to settle or overturn, resulting in extremely bad social impacts and irreversible economic losses.

Utility model content

The first objective of the present utility model is to provide a foundation reinforcement structure for shallow buried structures around deep foundation pits with simple structure, convenient construction, little influence on existing shallow foundation structures, and good reinforcement effect.

The first object of the present utility model is achieved through the following technical measures: a foundation reinforcement structure for shallow buried structures around a deep foundation pit, including fixed steel plates, grouting steel pipes, and anti-overturning structures that are sequentially set outward along the outer edge of the existing foundation. The anti-overturning plate includes a steel skeleton and concrete poured around the existing foundation. The fixed steel plate is arranged outside the existing foundation in a square shape and is located in the poured concrete. Holes are reserved for the arrangement position. The grouting steel pipes are arranged in the circumferential direction around the existing foundation, and the number of the arrangement is not less than 2 rings. The adjacent 2 rings of grouting steel pipes are arranged in a plum-shaped staggered arrangement, and the tail end of the grouting steel pipes of the same ring passes through. The reserved holes of the fixed steel plate are welded and fixed together with the fixed steel plate.

As an improvement, the steel skeleton is a double-layer steel mesh, and the steel skeleton is connected with the existing foundation by planting steel bars.

As an improvement, the front end of the grouting steel pipe is provided with a cone head, the rear end is provided with a slurry stop section, and the middle part is provided with slurry overflow holes arranged at equal intervals.

As an improvement, the degree of the cone head is not less than 10cm, the length of the slurry stop section is not less than 1.5m, the distance between the slurry overflow holes is 15cm, and the slurry overflow holes are arranged in a plum blossom shape and have a diameter of 10-16mm .

As an improvement, the fixed steel plate connects the grouting steel pipe into a whole, and is welded and fixed to the steel skeleton firmly. The fixed steel plate includes a first layer of fixed steel plates and a second layer of fixed steel plates. Layer fixed steel plates are located above and below the steel skeleton, respectively.

As an improvement, the fixed steel plate is made of a 1 cm steel plate, and the width of the fixed steel plate is 3 times the diameter of the grouting steel pipe.

Compared with the prior art, the utility model has the following advantages:

1. The existing foundation is reinforced by grouting steel pipe. At the same time, the grouting steel pipe and the anti-overturning plate form a "pile cap" as a whole, which effectively increases the bearing capacity and stability of the existing foundation, and the reinforcement effect is good.

2. The structure of the utility model is convenient for construction, can avoid the related problems caused by the relocation of existing structures, and has fast construction speed and high efficiency.

3. The utility model reinforces the foundation of the structures around the foundation pit in situ, and requires less resources such as machinery and materials. Compared with the relocation of structures, there is no need for dismantling and new construction, the construction cost is significantly reduced, and the economic benefit is good.

Description of drawings

Figure 1 is a schematic diagram of a grouting steel pipe of the present utility model for the foundation reinforcement structure of shallow buried structures around a deep foundation pit.

Fig. 2 is a schematic diagram of the plane layout of the grouting steel pipe of the foundation reinforcement structure of the shallow buried structures around the deep foundation pit according to the present invention.

3 is a schematic cross-sectional view of a foundation pit excavation of a foundation reinforcement structure of a shallow buried structure around a deep foundation pit of the present invention.

4 is a schematic plan view of the connection between the steel skeleton and the fixed steel plate of the foundation reinforcement structure of the shallow buried structures around the deep foundation pit of the present invention.

5 is a schematic cross-sectional view of the connection between the steel skeleton and the fixed steel plate of a foundation reinforcement structure of a shallow buried structure around a deep foundation pit of the present invention.

6 is a schematic cross-sectional view of the reinforcement of the foundation reinforcement structure of the shallow buried structures around the deep foundation pit of the present invention.

Reference numerals: 1, grouting steel pipe, 101, cone head, 102, stopper section, 103, overflow hole, 2, fixed steel plate, 201, first layer of fixed steel plate, 202, second layer of fixed steel plate, 3, Anti-overturning plate, 301, foundation pit excavation line, 302, steel frame, 4, existing foundation.

Detailed ways

In order to better understand the technical solutions of the present utility model, the present utility model is further described in detail below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

A foundation reinforcement structure for shallow buried structures around a deep foundation pit, characterized in that it includes a fixed steel plate 2, a grouting steel pipe 1 and an anti-overturning plate 3 that are sequentially arranged along the outer edge of an existing foundation 4 and outwards, and the anti-overturning plate 3 Including the steel frame 302 and the concrete poured around the existing foundation 4, the fixed steel plate 2 is arranged in a square outside the existing foundation 4 and is located in the poured concrete, and the fixed steel plate 2 is provided with a steel pipe 1 arranged according to the grouting. Holes are reserved for the positions. The grouting steel pipes 1 are arranged circumferentially around the existing foundation 4, and the number of the arrangement is not less than 2 rings. The adjacent 2 rings of grouting steel pipes 1 are staggered in a plum blossom shape, and the same ring of grouting steel pipes 1 ends. The ends pass through the reserved holes of the fixed steel plate 2 and are welded and fixed together with the fixed steel plate 2 .

As a preferred implementation of this embodiment, the reinforcing bar frame 302 is a double-layer steel mesh, and the reinforcing bar frame 302 and the existing foundation 4 are connected by planting bars.

As a preferred implementation of this embodiment, the front end of the grouting steel pipe 1 is provided with a conical head 101, the rear end is provided with a slurry stop section 102, and the middle part is provided with slurry overflow holes 103 arranged at equal intervals.

As a preferred implementation of this embodiment, the degree of the cone head 101 is not less than 10cm, the length of the slurry stop section 102 is not less than 1.5m, the distance between the slurry overflow holes 103 is 15cm, the slurry overflow The holes 103 are arranged in a plum blossom shape and have a diameter of 10-16 mm.

As a preferred implementation of this embodiment, the fixed steel plate 2 connects the grouting steel pipe 1 into a whole, and is welded and fixed with the steel skeleton 302 firmly. The fixed steel plate 2 includes a first layer of fixed steel plates 201, a second layer of The steel plate 202 is fixed. The first layer of the fixed steel plate 201 and the second layer of the fixed steel plate 202 are located above and below the steel skeleton 302, respectively.

As a preferred implementation of this embodiment, the fixed steel plate 2 is made of a 1 cm steel plate, and the width of the fixed steel plate 2 is about three times the diameter of the grouting steel pipe 1 .

When the utility model is specifically implemented, firstly, the conditions of the surrounding pipelines of the existing foundation 4 are checked, arranged and listed; secondly, the grouting holes are drilled according to the arrangement position of the grouting steel pipe 1; the grouting steel pipe 1 is installed again and grouting reinforcement is performed; The anti-overturning plate foundation pit is excavated again according to the foundation pit excavation line 301. After simultaneously cleaning the surface of the existing foundation 4, planting reinforcement holes are drilled on the existing foundation according to the position of the main reinforcement of the reinforcement frame 302; The fixed steel plate 301, the reinforcing steel frame 3, and the second fixed steel plate 302 are installed. The contact part between the fixed steel plate and the steel frame 302 is fully welded and fixed on both sides. The fixed steel plate 2 and the grouting steel pipe 1 are welded and fixed. There is foundation 4; finally, concrete for anti-overturning plate 3 is poured and concrete curing is done.

The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, on the basis of the above descriptions, the Changes or changes in other different forms cannot be exhausted here, and all obvious changes or changes derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims (6)

1. A foundation reinforcement structure for shallow buried structures around a deep foundation pit, characterized in that it comprises a fixed steel plate (2), a grouting steel pipe (1) and an anti-overturning plate that are sequentially set outward along the outer edge of the existing foundation (4). (3), the anti-overturning plate (3) includes a steel frame (302) and concrete poured around the existing foundation (4), and the fixed steel plate (2) is arranged in a square shape outside the existing foundation (4) and is Located in the poured concrete, the fixed steel plate (2) is provided with holes reserved according to the arrangement position of the grouting steel pipe (1), and the grouting steel pipe (1) is circumferentially arranged along the circumference of the existing foundation (4). The number is not less than 2 rings, and the adjacent 2 rings of grouting steel pipes (1) are staggered in a plum blossom shape. The tail end of the same ring of grouting steel pipes (1) passes through the fixed steel plate (2) The reserved holes are welded to the fixed steel plate (2). fixed together. 2. A kind of foundation reinforcement structure of shallow buried structures around a deep foundation pit according to claim 1, characterized in that: the steel skeleton (302) is a double-layer steel mesh, and the steel skeleton (302) is connected to an existing foundation. (4) Use the way of planting bars to connect. 3. A foundation reinforcement structure for shallow buried structures around a deep foundation pit according to claim 1, characterized in that: a cone head (101) is provided at the front end of the grouting steel pipe (1), and a slurry stop is provided at the rear end of the grouting steel pipe (1). Section (102), the middle part is provided with slurry overflow holes (103) arranged at equal intervals. 4. A kind of foundation reinforcement structure of shallow buried structures around a deep foundation pit according to claim 3, characterized in that: the degree of the cone head (101) is not less than 10cm, and the length of the slurry stop section (102) is not less than 10cm. If the size is less than 1.5m, the spacing of the slurry overflow holes (103) is 15cm, and the slurry overflow holes (103) are arranged in a plum blossom shape and have a diameter of 10-16mm. 5. A kind of foundation reinforcement structure of shallow buried structures around a deep foundation pit according to claim 1, characterized in that: the fixed steel plate (2) connects the grouting steel pipe (1) into a whole, and is connected with the steel skeleton (302) ) is welded and fixed firmly, the fixed steel plate (2) includes a first layer of fixed steel plates (201) and a second layer of fixed steel plates (202), the first layer of fixed steel plates (201) and the second layer of fixed steel plates (202) They are located above and below the steel frame (302), respectively. 6. A kind of foundation reinforcement structure of shallow buried structures around a deep foundation pit according to claim 5, characterized in that: the fixed steel plate (2) is made of 1cm steel plate, and the width of the fixed steel plate (2) is 1 cm. 3 times the diameter of the slurry steel pipe (1).

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