Existing building reinforcing structure close to subway

Abstract

The utility model discloses an existing building reinforcing structure close to a subway, which comprises a first anchor rod, a second anchor rod and an anchor cable, and the first anchor rod is arranged on one side, close to a subway tunnel, of a building and vertically anchored into a soil body; the plurality of first anchor rods form an underground curtain; the second anchor rod is arranged perpendicular to the side wall of the subway tunnel and anchored into the soil body, and the second anchor rod perpendicularly abuts against the rod wall of the first anchor rod; one end of the anchor cable is anchored on the top of the subway tunnel, and the other end of the anchor cable is anchored on the ground. The anchor cable is obliquely arranged, the first anchor rod and the second anchor rod define the cavity for containing the soil body, the cavity is used for anchoring and supporting the soil body, in the subway tunnel construction process and the subway operation process, disturbance to the soil body between a tunnel and a building can be effectively prevented in the subway tunnel construction process, uneven settlement of the soil body is prevented, and the service life of the subway tunnel is prolonged. The overall stability of buildings near the subway tunnel is effectively guaranteed, and the conditions of building cracking and settlement are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of building reinforcement, and more particularly to a reinforcement structure of an existing building adjacent to a subway. Background Art

[0002] Currently, large cities often excavate underground tunnels to build underground public transportation facilities such as subways to alleviate pressure on surface traffic. To minimize the impact of tunnel construction on existing surface traffic, tunnel construction is typically carried out using the hidden excavation method, which involves using shield machines to perform pipe jacking operations.

[0003] During the excavation of subway tunnels, the soil beneath buildings near the subway will be disturbed, which can easily cause uneven settlement and instability of the underlying soil of the buildings, which can easily lead to construction accidents such as irregular building settlement and tunnel collapse and water seepage.

[0004] Currently, a common reinforcement method is grouting the soil between subway tunnels and buildings. This method primarily involves pre-grouting or tracking grouting around the building using sleeve valve pipes. This method primarily improves the soil beneath the building foundation, increasing its cohesion and internal friction angle. This approach is primarily targeted at buildings located within the foundation's depth range, where there are no unfavorable strata such as sand or silt, and where there is a relatively impermeable layer beneath the foundation to prevent deformation caused by groundwater loss during construction.

[0005] While this method improves the performance of the soil beneath the foundation, field experience and laboratory test data show that grouting reinforcement has limited potential to significantly improve soil performance indicators. Furthermore, the grouting pressure must be controlled during the reinforcement process. Excessive pressure can cause localized tilting or cracking of the building. However, insufficient pressure can lead to incomplete reinforcement of the soil beneath the foundation, leaving blind spots and imperfect reinforcement.

[0006] Therefore, how to provide an existing building reinforcement structure that can effectively improve the soil performance between the subway tunnel and the building body, not only considering the impact during the subway tunnel passing through, but also considering the vibration impact during the subway operation, preventing the occurrence of cracking and settlement of the building, and ensuring the overall stability of the building, is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0007] In view of this, the present invention provides a reinforcement structure for an existing building near a subway, aiming to solve the above technical problems.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A reinforcement structure for an existing building near a subway, comprising:

[0010] The first anchor rod, which is arranged on the side of the building close to the subway tunnel and vertically anchors into the soil; multiple first anchor rods are arranged parallel to the through direction of the subway tunnel to form an underground curtain;

[0011] The second anchor rod, which is arranged perpendicular to the side wall of the subway tunnel and anchors into the soil, and one end of the second anchor rod is vertically abutted against the rod wall of the first anchor rod; the number of the second anchor rods is multiple, and multiple second anchor rods are arranged at intervals up and down along the height direction of the subway tunnel to form multiple columns; multiple columns of the second anchor rods correspond to multiple first anchor rods one by one;

[0012] The cable anchor, which is multiple and arranged perpendicular to the through direction of the subway tunnel, and multiple cable anchors penetrate the soil, one end of which is anchored on the top of the subway tunnel, and the other end is anchored on the ground corresponding to the top ends of multiple first anchor rods.

[0013] The beneficial effects of the above technical solution are that multiple first anchor rods form an underground curtain, the second anchor rods are vertically abutted against the first anchor rods correspondingly, the cable anchors are arranged obliquely and enclose a cavity for accommodating soil with the first anchor rods and the second anchor rods to anchor and support the soil. During the construction of the subway tunnel and the operation of the subway, it can effectively prevent the disturbance of the soil between the tunnel and the building during the construction of the subway tunnel, prevent the uneven settlement of the soil, effectively ensure the overall stability of the building near the subway tunnel, and prevent the occurrence of building cracking and settlement.

[0014] Preferably, it further includes a strip foundation, and the top ends of multiple first anchor rods and multiple cable anchors are embedded and fixed in the strip foundation. The first anchor rods and the cable anchors are anchored into a whole through the strip foundation.

[0015] Preferably, it further includes prestressed pipe piles, a bearing platform and a supporting beam. The prestressed pipe piles are arranged on the other side of the building relative to the first anchor rods and vertically driven into the soil; there are two prestressed pipe piles and they are symmetrically arranged and correspond to the strip foundation; the bearing platform is anchored on the top ends of the prestressed pipe piles; the number of the supporting beams is multiple, and the two ends of multiple supporting beams are respectively fixed to the opposite side walls of the two bearing platforms or the bearing platform and the opposite side walls of the strip foundation to connect the bearing platform and the strip foundation into a frame beam and sleeved on the periphery of the building foundation. By adding a pipe pile foundation outside the building, the bearing platform on the top of the pipe pile foundation is connected with the strip foundation by using the supporting beam to prevent the uneven settlement of the strip foundation, thereby ensuring the anchoring performance of the cable anchors and the anchor to the soil and reducing the uneven settlement of the soil.

[0016] Preferably, it further includes coupling beams. The number of the coupling beams is multiple. Both ends of the multiple coupling beams are respectively fixed to opposite side walls of the building foundation and the bearing beam or to opposite side walls of the building foundation and the strip foundation. The coupling beams connect the bearing beam with the building foundation and the strip foundation, so that the building foundation, the strip foundation, the bearing beam and the support form an integral structure. The strip foundation and the bearing beam reinforce the building foundation, and during the construction of the subway tunnel and the operation of the subway, it can reduce the disturbance caused by the construction load and the vibration generated by the train running to the building foundation and ensure the overall stability of the building.

[0017] Preferably, the strip foundation, the bearing platform, the bearing beam and the coupling beams are all buried below the ground surface. The building is reinforced without affecting the overall layout on the ground surface.

[0018] Preferably, the multiple anchor cables and the multiple first anchor rods are arranged in a staggered plum blossom pattern. The plum blossom pattern arrangement of the first anchor rods and the anchor cables further improves the stability of the soil body and reduces the uneven settlement of the soil body.

[0019] Preferably, the distance between the first anchor rod and the building is not greater than 1.5 m. Ensure that the soil body between the building and the subway tunnel can be effectively stabilized.

[0020] Preferably, the spacing between adjacent two first anchor rods and the spacing between adjacent two anchor cables are both 1 - 1.2 m.

[0021] Through the above technical solutions, compared with the prior art, the present utility model discloses a reinforcement structure for an existing building adjacent to a subway. The soil body between the subway tunnel and the building is reinforced by means of anchoring and anchor cables. The anchor cables and the anchor rods form a closed structure to support the soil body, effectively preventing the generation of uneven settlement of the soil body. At the same time, the building foundation is connected to the reinforcement structure, and the building foundation is located on the reinforcement structure, preventing the uneven settlement of the building foundation, effectively ensuring the stability performance of the building and preventing the occurrence of building cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 It is the top view of the reinforcement structure provided by the present utility model;

[0024] Figure 2 It is the cross-sectional view of the reinforcement structure provided by the present utility model;

[0025] Figure 3 Longitudinal sectional view of the reinforcement structure provided by the present utility model.

[0026] Wherein,

[0027] 1 - Subway tunnel; 2 - Building; 3 - First anchor rod; 4 - Second anchor rod; 5 - Cable anchor; 6 - Strip foundation; 7 - Prestressed pipe pile; 8 - Cap; 9 - Supporting beam; 10 - Connecting beam. Specific embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] See the attached Figures 1 to 3 , the embodiments of the present utility model disclose a reinforcement structure for an existing building adjacent to a subway, including:

[0030] The first anchor rod 3 is arranged on one side of the building 2 close to the subway tunnel 1 and vertically anchors into the soil; multiple first anchor rods 3 are arranged parallel to the penetration direction of the subway tunnel 1 to form an underground curtain;

[0031] The second anchor rod 4 is arranged perpendicular to the side wall of the subway tunnel 1 and anchors into the soil, and one end of the second anchor rod 4 is vertically abutted against the rod wall of the first anchor rod 3; the number of the second anchor rods 4 is multiple, and multiple second anchor rods 4 are arranged at intervals up and down along the height direction of the subway tunnel 1 and form multiple columns; multiple columns of second anchor rods 4 correspond to multiple first anchor rods 3 one by one;

[0032] The cable anchors 5 are multiple and arranged perpendicular to the penetration direction of the subway tunnel 1, and multiple cable anchors 5 penetrate the soil, one end of which is anchored at the top of the tunnel of the subway tunnel 1, and the other end is anchored on the ground corresponding to the top ends of multiple first anchor rods 3.

[0033] In this embodiment, before the construction of the anchor rod, drilling is carried out on the preset anchor installation position, and after the drilling is completed, the anchor is installed and grouting is carried out in the drilling hole. Similarly, before the installation of the cable anchor, drilling is carried out at the cable anchor installation position, and after the drilling, the cable anchor is tensioned, and after the tensioning is completed, grouting is carried out, as Figure 2As shown in the figure, the first anchor rod is arranged vertically, the second anchor rod is arranged horizontally, and the cable anchor is arranged obliquely. The soil is anchored and supported by the anchor rods. While the cable anchor anchors and supports the soil, it can also provide prestress to improve the extrusion deformation ability between the soil inside. The cable anchor, the first anchor rod and the second anchor rod wrap the soil, and the disturbance generated during the construction of the subway tunnel or during the operation of the subway will not cause uneven settlement of the soil, effectively ensuring the stability of the soil between the building and the subway tunnel, which ensures that the building will not settle or crack due to soil disturbance caused by subway construction or subway operation factors.

[0034] To further optimize the above technical solution and make the cable anchor and the first anchor rod form a stable integral structure, a strip foundation 6 is further included. The tops of multiple first anchor rods 3 and multiple cable anchors 5 are all embedded and fixed in the strip foundation 6.

[0035] To further optimize the technical solution and prevent the situation that the settlement of the soil is caused by the decrease of the supporting performance of the anchor rods and the cable anchor, which affects the overall stability performance of the building, prestressed pipe piles 7, a bearing platform 8 and a supporting beam 9 are further included. The prestressed pipe piles 7 are arranged on the other side of the building 2 relative to the first anchor rod 3 and are vertically driven into the soil; there are two prestressed pipe piles 7 and they are symmetrically arranged and correspond to the strip foundation 6; the bearing platform 8 is anchored at the top of the prestressed pipe piles 7; there are multiple supporting beams 9, and the two ends of the multiple supporting beams 9 are respectively fixed to the opposite side walls of the two bearing platforms 8 or the bearing platform 8 and the strip foundation 6 are fixed to the opposite side walls to connect the bearing platform 8 and the strip foundation 6 into a frame beam and sleeved on the periphery of the foundation of the building 2.

[0036] As Figure 1 shown in the figure, two prestressed pipe piles are driven on the other side of the building relative to the first anchor rod as the pile foundation for building reinforcement. The bearing platform is used as the pile cap of the prestressed pipe pile. The bearing platform and the strip foundation are connected by the supporting beam, and the strip foundation connects the first anchor rod and the cable anchor. Such an overall structure effectively ensures the stability performance of the anchor rods and the cable anchor in the soil and can effectively support the soil between the subway tunnel and the building.

[0037] To further optimize the above technical solution, a connecting beam 10 is further included. The number of the connecting beams 10 is multiple, and the two ends of the multiple connecting beams 10 are respectively fixed to the opposite side walls of the building foundation 2 relative to the supporting beam 9 or to the opposite side walls of the building foundation 2 relative to the strip foundation 6.

[0038] The building foundation is connected to the supporting beam and the strip foundation through the connecting beam, and the building foundation is supported between the frame beams formed by the strip foundation and the supporting beam. Even if the soil near the building foundation undergoes uneven settlement, the building can be supported by the strip foundation and the supporting beam, and the building will not settle, which ensures the overall stability performance of the building and prevents the building from cracking.

[0039] To further optimize the above technical solution, ensure that the reinforcement structure will not affect the above-ground part, and ensure the aesthetics around the building, the strip foundation 6, the bearing platform 8, the supporting beam 9 and the connecting beam 10 are all buried below the ground surface.

[0040] To further optimize the above technical solution and provide the anchoring and supporting performance for the soil body, multiple cable bolts 5 and multiple first anchor bolts 3 are arranged in a staggered plum blossom pattern.

[0041] In some other specific embodiments, the distance between the first anchor bolt 3 and the building 2 is not greater than 1.5 m. Preferably 1.2 m.

[0042] The spacing between two adjacent first anchor bolts 3 and the spacing between two adjacent cable bolts 5 are both 1 - 1.2 m.

[0043] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, refer to the description in the method part.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reinforcement structure for an existing building adjacent to a subway, characterized in that, Including: The first anchor rod (3), which is arranged on the side of the building (2) close to the subway tunnel (1) and vertically anchors into the soil mass; multiple first anchor rods (3) are arranged parallel to the penetration direction of the subway tunnel (1) to form an underground curtain; The second anchor rod (4), which is arranged perpendicular to the side wall of the subway tunnel (1) and anchors into the soil mass, and one end of the second anchor rod (4) is vertically abutted against the rod wall of the first anchor rod (3); the number of the second anchor rods (4) is multiple, and multiple second anchor rods (4) are arranged at intervals up and down along the height direction of the subway tunnel (1) to form multiple columns; multiple columns of the second anchor rods (4) correspond to multiple first anchor rods (3) one by one; The anchor cables (5), which are multiple and arranged perpendicular to the penetration direction of the subway tunnel (1), and multiple anchor cables (5) penetrate through the soil mass, one end of which is anchored at the top of the tunnel of the subway tunnel (1), and the other end is anchored at the ground corresponding to the top ends of multiple first anchor rods (3).

2. The reinforced structure of an existing building adjacent to a subway according to claim 1, characterized in that, It further includes a strip foundation (6), and the top ends of multiple first anchor rods (3) and multiple anchor cables (5) are embedded and fixed in the strip foundation (6).

3. The reinforcement structure of an existing building adjacent to a subway according to claim 2, wherein It further includes prestressed pipe piles (7), a bearing platform (8) and a supporting beam (9), and the prestressed pipe piles (7) are arranged on the other side of the building (2) relative to the first anchor rod (3) and vertically driven into the soil mass; there are two prestressed pipe piles (7) which are symmetrically arranged and correspond to the strip foundation (6); the bearing platform (8) is anchored at the top ends of the prestressed pipe piles (7); there are multiple supporting beams (9), and both ends of multiple supporting beams (9) are respectively fixed to the opposite side walls of two bearing platforms (8) or the bearing platform (8) is fixed to the opposite side walls of the strip foundation (6) to connect the bearing platform (8) and the strip foundation (6) into a frame beam and sleeved on the periphery of the foundation of the building (2).

4. A reinforced structure for an existing building near a subway according to claim 3, characterized in that, It further includes a connecting beam (10), and the number of the connecting beams (10) is multiple, and both ends of multiple connecting beams (10) are respectively fixed to the opposite side walls of the foundation of the building (2) and the supporting beam (9) or to the opposite side walls of the foundation of the building (2) and the strip foundation (6).

5. The reinforcement structure for an existing building adjacent to a subway according to claim 4, characterized in that, The strip foundation (6), the bearing platform (8), the supporting beam (9) and the connecting beam (10) are all buried below the ground surface.

6. The reinforcement structure for an existing building adjacent to a subway according to claim 1, wherein, Multiple anchor cables (5) and multiple first anchor rods (3) are arranged in a staggered plum blossom pattern.

7. An existing building reinforcement structure near a subway according to claim 1, characterized in that, The distance between the first anchor rod (3) and the building (2) is not greater than 1.5 m.

8. The reinforced structure of an existing building adjacent to a subway according to claim 1, wherein, The spacing between adjacent two first anchor rods (3) and adjacent two anchor cables (5) is 1 - 1.2 m.

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