An emergency anti-sinking structure and anti-sinking method arranged on one side of an existing building exterior

Abstract

The present invention discloses an emergency anti-sinking structure and anti-sinking method arranged on one side outside an existing building, which relates to the technical field of building tilt correction, and includes the following steps: 1. Calculate and analyze the load of the existing building structure, and calculate the load borne by each foundation on the existing foundation and the load that needs to be shared by the newly added piles; 2. Determine the parameters of the newly added piles and the number of newly added piles according to the engineering geological conditions of the site; 3. Determine the specific position of the newly added piles outside the shear wall on the side of the existing building structure that is sinking; 4. Implant the newly added piles at the determined specific position, fix the corbels corresponding to the newly added piles on the shear wall, and support the corbels on the newly added piles with a rotating seat. The present invention can quickly solve the problem of continued settlement on the side of the house structure with large settlement, and create favorable conditions for the later correction of the house structure (jacking or forced landing); and the construction speed is fast, the upper structure load can be effectively transferred to the newly added piles, and the newly added piles will not cause obstacles or adverse effects on the correction of the house structure.

Description

Technical Field

[0001] The present invention relates to the technical field of building tilt correction, and in particular to an emergency anti-sinking structure and an anti-sinking method arranged on one side outdoors of an existing building. Background Art

[0002] During the construction or use of a building, due to unclear geological conditions or changes in the environmental conditions of the foundation, uneven settlement of the foundation occurs, and the existing building needs to be corrected.

[0003] The methods commonly used to prevent house settlement are: 1. Grouting method: inject grouting material into the foundation soil to increase foundation strength and reduce foundation deformation; 2. Increasing foundation area method: increase the foundation area to reduce the load per unit area of ​​the foundation, thereby reducing foundation deformation; 3. Pile foundation replacement method: set foundation piles on the bottom or side of the foundation, and then connect the piles to the existing foundation to transfer all or part of the superstructure load to the newly added piles, thereby reducing the load on the foundation and reducing foundation deformation.

[0004] The pile foundation replacement method usually requires that the center of gravity of the superstructure and the centroid of the pile foundation are basically coincident, with the aim of avoiding load eccentricity as much as possible. For example, if piles are arranged outside the shear wall at a location where house settlement is large, piles need to be arranged inside the shear wall, and the new piles inside and outside the shear wall are connected through the original foundation or a newly added pedestal to jointly bear the load of the superstructure.

[0005] However, before implementing the above methods to prevent house settlement, it is necessary to temporarily correct the house's tilt to prevent further settlement at the point where the house has settled to the maximum, to avoid further affecting the safety of the house or increasing the difficulty of the correction work due to increased house tilt. Summary of the invention

[0006] The purpose of the present invention is to provide an emergency anti-sinking structure and an anti-sinking method arranged on one side outdoors of an existing building, which can quickly solve the problem of continued sinking on the side of the building structure with greater settlement, and create favorable conditions for the later correction of the inclination of the building structure (jacking up or forced landing); at the same time, the construction speed is fast, the upper structure load can be effectively transferred to the newly added piles, and the newly added piles will not cause obstacles or adverse effects on the correction of the inclination of the building structure.

[0007] In order to achieve the purpose of the present invention, the technical solution adopted is: an emergency anti-sinking structure is arranged on one side outside an existing building, including a newly added pile located outside the building structure and embedded in the foundation and a corbel fixed on the building structure; a rotating seat is installed on the upper end of the newly added pile, and the corbel is supported on the rotating seat.

[0008] Furthermore, the corbel is fixed on a shear wall column of an existing building structure.

[0009] Furthermore, a bearing platform attached to the ground is fixed on the upper end of the newly added pile, and the rotating seat is installed on the bearing platform.

[0010] Furthermore, the rotating seat includes a base fixed on the support platform, and the base is provided with a ball socket, and a hemisphere supporting the corbel is installed in the ball socket.

[0011] Furthermore, the upper surface of the hemisphere is higher than the upper surface of the base.

[0012] Furthermore, the newly added piles are prefabricated cement piles or steel pipe piles.

[0013] A method for arranging an emergency anti-sinking device on one side outside an existing building comprises the following steps:

[0014] 1) Calculate and analyze the loads on the existing building structure, and calculate the loads borne by each foundation in the existing foundation and the loads that need to be shared by the new piles;

[0015] 2) Determine the parameters and quantity of new piles based on the engineering geological conditions of the site;

[0016] 3) Determine the specific location of the new piles outside the shear wall on the side of the existing building structure that is sunk;

[0017] 4) Plant new piles at the determined specific locations, fix the corbels corresponding to the new piles on the shear wall, and support the corbels on the new piles using rotating seats.

[0018] Furthermore, before determining the position of the newly added piles, the static reaction force of the foundation of each foundation in the existing building structure in the original foundation soil and the increased reaction force after adding the newly added piles are calculated, and the installation position of the corbel and the original shear wall reinforcement parameters in the existing building structure are determined.

[0019] Furthermore, before the additional piles are planted, the compression, shearing, shearing and bending resistance of the corbels and shear walls are verified.

[0020] The beneficial effects of the present invention are:

[0021] The construction speed is fast by laying piles outdoors on the shear wall on the side where the existing building structure is sinking. Generally, the outdoor working space is large, and large-scale mechanical equipment can be used to quickly construct the foundation piles, such as hammering prestressed pipe piles, static pile driver piles, or directly implanting steel pipe piles, etc. The upper load can be transferred to the newly added piles in a short time to quickly prevent the settlement of the existing building structure, provide sufficient time for the subsequent foundation reinforcement and house tilt correction, create more favorable conditions, and make the entire process of foundation reinforcement and house tilt correction more scientific and reasonable.

[0022] By setting a rotating seat on the top of the newly added pile, the corbel added to the shear wall on the sinking side of the existing building structure is supported on the rotating seat. During installation, a certain gap can be retained between the corbel and the rotating seat. After the existing building structure continues to sink, the gap between the corbel and the rotating seat disappears, the corbel contacts the rotating seat, and the upper structure load begins to transfer to the newly added pile.

[0023] Since there is no direct connection between the newly added piles and the corbels at the beginning, when the existing building structure is lifted and corrected at a later stage, the existing building structure and the newly added piles can be freely separated from each other without causing any tension problems. During forced landing and correction, since the corbels and the newly added piles can rotate relative to each other, the existing building structure can rotate around the newly added piles without being subjected to external bending moments, that is, the newly added piles will not cause any obstacles or adverse effects on the correction of the existing building structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0025] Figure 1 A schematic diagram of an existing building structure provided by the present invention;

[0026] Figure 2 A structural schematic diagram of an emergency anti-sinking structure arranged on one side outside an existing building provided by the present invention;

[0027] Figure 3 This is a structural diagram of the corbel and the newly added piles;

[0028] Figure 4 It is a schematic diagram of the structure of the base and the hemisphere;

[0029] Figure 5 is a schematic diagram of the structure of the base;

[0030] Figure 6 Schematic diagram of the hemisphere structure.

[0031] Markings and corresponding parts names in the attached drawings:

[0032] 1. Foundation, 2. Existing building structure, 3. Shear wall, 4. New piles, 5. Corbel, 6. Base, 7. Hemisphere, 8. Capping platform. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific implementation methods described herein are only used to explain the relevant content, rather than to limit the present invention. It is also necessary to explain that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] like Figures 1 to 6 As shown, the present invention provides an emergency anti-sinking structure arranged on one side outside the existing building, including a corbel 5 and a newly added pile 4, wherein the corbel 5 is fixed on the outer wall of the shear wall 3 on the sinking side of the existing building structure 2, and the newly added pile 4 is implanted outside the shear wall 3 on the sinking side of the existing building structure 2. Since the existing building structure 2 generally sinks more seriously on one side of the existing building structure 2 when it sinks, the newly added pile 4 only needs to be implanted on the side of the existing building structure 2 where the sinking is most serious; of course, when there is sinking all around the existing building structure 2, the corbel 5 can be on the outer wall of the shear wall 3 around the existing building structure 2, and at this time, the newly added pile 4 needs to be implanted outside the shear wall 3 around the existing building structure 2. When the newly added pile 4 is implanted on the existing foundation, a certain distance is maintained between the newly added pile 4 and the outer wall of the existing building structure 2. It should be noted that the shear wall 3 outdoors in the present invention refers to one side of the outer shear wall 3 outdoors in the existing building structure 2.

[0036] A rotating seat is also installed on the top of the newly added pile 4. After the corbel 5 is fixed outdoors the shear wall 3 in the existing building structure 2, the end of the corbel 5 away from the shear wall 3 in the existing building structure 2 is supported on the rotating seat. It should be noted here that there is no connection between the corbel 5 and the rotating seat, and there is only a contact relationship between the corbel 5 and the rotating seat. This can not only ensure that during the jacking and tilt correction process of the existing building structure 2, the existing building structure 2 can be freely disengaged from the newly added pile 4, but also that the existing building structure 2 can rotate around the anti-sinking pile during the jacking and tilt correction process of the existing building structure 2, so that the upper structure load can be effectively transferred to the newly added pile 4, and the newly added pile 4 will not cause obstacles or adverse effects on the tilt correction work of the building structure.

[0037] In order to facilitate the installation of the corbel 5, the corbel 5 can be directly fixed on the wall column of the shear wall 3 on the existing building structure 2; of course, under the condition that the construction requirements are met and the corbel 5 cooperates with the newly added piles 4, the corbel 5 can be installed at any height or any position on the outer wall of the shear wall 3 in the existing building structure 2.

[0038] In order to ensure the support of the corbel 5 and the installation of the rotating seat, a cap 8 is also fixed on the top of the newly added pile 4. The cap 8 can be attached to the ground, so that when the upper structure load is transferred to the cap 8, the cap 8 can transfer part of the upper structure load to the newly added pile 4 and the other part to the ground. On the one hand, it can effectively prevent the newly added pile 4 from tilting, and on the other hand, it can make the load borne by the newly added pile 4 larger. When the cap 8 is installed on the top of the newly added pile 4, the rotating seat is directly installed on the cap 8, making the installation of the rotating seat more convenient.

[0039] As a further option of this embodiment, the rotating seat includes a base 6 and a hemisphere 7, wherein the base 6 is fixed on the base 8, and a ball socket is opened on the upper surface of the base 6, the depth of the ball socket is less than the radius of the ball socket, and the hemisphere 7 is placed in the ball socket, and the hemisphere 7 can fully rotate in the ball socket; the corbel 5 is supported on the hemisphere 7, specifically, the corbel 5 and the hemisphere 7 are not fixed, when the newly added pile 4 is installed, there is a certain gap between the corbel 5 and the hemisphere 7, and the newly added pile 4 does not play a role in stopping sinking, and after the existing building structure 2 continues to sink, the gap between the corbel 5 and the hemisphere 7 disappears, the corbel 5 is supported on the hemisphere 7, and the load of the local structure begins to transfer to the newly added pile 4.

[0040] In order to prevent the corbel 5 from being directly supported on the upper surface of the base 6 and affecting the natural disengagement between the newly added pile 4 and the corbel 5 and the rotation of the existing building structure 2 around the newly added pile 4, the hemisphere 7 is designed so that the height of the hemisphere 7 in the ball socket is greater than the depth of the ball socket, so that after the hemisphere 7 is installed in the ball socket, the upper surface of the hemisphere 7 is higher than the upper surface of the base 6, thereby effectively preventing the lower surface of the corbel 5 from fitting against the upper surface of the base 6, thereby ensuring the relative rotation between the corbel 5 and the newly added pile 4.

[0041] Since the anti-sinking structure provided by the present invention is used for temporary tilt correction of a house, i.e., emergency tilt correction of a house, the newly added piles 4 in the present invention can be prefabricated cement piles or steel pipe piles, and the implantation of the newly added piles 4 can be selected by hammering prestressed pipe piles, static pile driver pile driving, etc.

[0042] It should be noted that the anti-sinking structure provided by the present invention needs to ensure that a certain gap is reserved between the hemisphere 7 and the corbel 5 in the early installation stage. After the existing building structure 2 continues to settle, the gap between the corbel 5 and the hemisphere 7 disappears, and the corbel 5 is supported on the hemisphere 7. At this time, part of the upper structure load is transferred to the new pile, thereby achieving the purpose of reducing the load on the foundation soil and preventing the existing building structure 2 from settling.

[0043] like Figures 1 to 6 As shown, the present invention also provides a method for arranging an emergency anti-sinking method on one side outside an existing building, comprising the following steps:

[0044] 1) By calculating and analyzing the load of the existing building structure 2 and according to the load of the superstructure, the load borne by each foundation in the existing foundation and the load that needs to be shared by the newly added piles 4 are calculated, thereby determining the vertical load Fk transmitted from the superstructure to the top surface of each newly added pile 4.

[0045] 2) According to the existing foundation 1 bearing capacity fa and the foundation ground area A, estimate the vertical load △Fk (where is the foundation 1 bearing capacity reduction factor set according to the current settlement and tilt status of the house, ≤1; ​​is the self-weight of the foundation and the weight of the soil on the foundation) that each foundation in the existing building structure 2 needs to bear through the newly added piles 4, so as to determine the parameters of the newly added piles 4 and the number of newly added piles 4 that need to be added to each foundation; at the same time, according to the site engineering geological conditions and on-site conditions, determine the pile type, pile diameter, single pile vertical compressive bearing capacity Ra and pile number n of the newly added piles 4 (where Ra can be estimated based on the stratum parameters, and can be verified through testing after the later trial pile construction, and the final number of piles can be determined).

[0046] 3) By analyzing and calculating the static reaction force of the foundation of each foundation in the original foundation soil and the reaction force increased after adding piles, and under the premise of keeping the size of the foundation plane unchanged, the reinforcement parameters of the corbel 5 and the shear wall 3 used to install the corbel 5 in the existing building structure 2 are determined, and according to the pile position, number of piles, upper structure load, etc. of the newly added piles 4, the compression, shearing, shearing and bending resistance of the corbel 5 and the shear wall 3 are checked to ensure that the corbel 5 and the shear wall 3 in contact with the newly added piles 4 meet the compression, shearing, shearing and bending bearing capacity requirements; then, the specific position of adding the newly added piles 4 outside the shear wall 3 in the existing building structure 2 is determined. When the verification result of the shear wall 3 for installing the corbel 5 in the existing building structure 2 does not meet the requirements, the shear and bending resistance of the shear wall 3 for installing the corbel 5 in the existing building structure 2 can be increased by increasing the thickness of the shear wall 3 for installing the corbel 5 in the existing building structure 2 and increasing the reinforcement method in the shear wall 3 for installing the corbel 5 in the existing building structure 2.

[0047] 4) Reinforce and reconstruct the shear wall 3 in the existing building structure 2 where the corbel 5 needs to be installed, and install the corbel 5 after the shear wall 3 is reconstructed; at the same time, implant the new pile 4 at the location where the new pile 4 is to be added. After the new pile 4, the shear wall 3 reinforcement and the corbel 5 construction are completed and reach the corresponding strength, install the base 6 on the top of the new pile 4, and place the hemisphere 7 in the ball socket on the base 6. Before implanting the new pile 4, ensure the implantation depth of the new pile 4 and the height of the base 6 after the top of the new pile 4 is installed, so as to ensure that after the hemisphere 7 is installed in the ball socket on the base 6, there is a gap between the upper surface of the hemisphere 7 and the lower surface of the corbel 5. During the continued settlement of the existing building structure 2, the corbel 5 is supported on the hemisphere 7, and the new pile 4 begins to participate in the work, so that the upper structure load begins to transfer to the new pile 4.

[0048] After the above method is adopted to emergency stop the sinking of the existing building structure 2, when the existing building structure 2 is lifted and tilted later, the newly added pile 4 and the corbel 5 will be naturally disconnected because there is no connection between the corbel 5 and the newly added pile 4; when the existing building structure 2 is forced to land and tilt corrected, the existing building structure 2 can rotate around the newly added pile 4 due to the action of the hemisphere 7 and the base 6; after the tilt correction is completed, the parts of the corbel 5 and the newly added pile 4 that are higher than the foundation 1 are removed or permanently sealed.

[0049] The present invention is mainly used for emergency anti-sinking of the existing building structure 2 that needs to be corrected, rather than for formal correction of the existing building structure 2. The construction is simple and feasible, the stress transfer path is clear, and the construction speed is fast. By adopting the emergency anti-sinking structure and the emergency anti-sinking method provided by the present invention, the upper structure load can be effectively transferred to the newly added piles 4, reducing the load borne by the original foundation 1, thereby reducing the deformation of the foundation 1 and achieving the purpose of anti-sinking; because the piles are only arranged on one side, the number of piles that usually need to be arranged symmetrically is reduced, and the unfavorable conditions of limited indoor construction space are also avoided, achieving the purpose of rapid anti-sinking; because only the non-connected method of the hemisphere 7 in contact with the base 6 is adopted, there is no obstacle to the correction of the existing building structure 2 in the later stage.

[0050] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. An emergency anti-sinking structure is arranged on one side outside an existing building, characterized in that: The invention comprises a newly added pile (4) located outside the building structure and embedded in the foundation (1), and a corbel (5) fixed on the building structure; a rotating seat is installed on the upper end of the newly added pile (4), and the corbel (5) is supported on the rotating seat; the rotating seat comprises a base (6) fixed on a bearing platform (8), and the base (6) has a ball socket, and a hemisphere (7) supporting the corbel (5) is installed in the ball socket, and the upper surface of the hemisphere (7) is higher than the upper surface of the base (6).

2. The emergency anti-sinking structure arranged on one side outside an existing building according to claim 1, characterized in that: The corbel (5) is fixed on a wall column of a shear wall (3) on an existing building structure (2).

3. The emergency anti-sinking structure arranged on one side outside an existing building according to claim 1, characterized in that: A bearing platform (8) attached to the ground is fixed on the upper end of the newly added pile (4), and the rotating seat is installed on the bearing platform (8).

4. The emergency anti-sinking structure arranged on one side outside an existing building according to claim 1, 2 or 3, characterized in that: The newly added piles (4) are prefabricated cement piles or steel pipe piles.

5. A method for arranging an emergency anti-sinking method on one side outside an existing building, characterized in that: The method comprises arranging an emergency anti-sinking structure on one side outside an existing building as claimed in any one of claims 1 to 4, and further comprising the following steps: 1) Calculate and analyze the loads on the existing building structure (2), and calculate the loads borne by each foundation on the existing foundation and the loads that need to be shared by the new piles (4); 2) Determine the parameters of the additional piles (4) and the number of the additional piles (4) according to the engineering geological conditions of the site; 3) Determine the specific location of the newly added pile (4) outside the shear wall (3) on the lower side of the existing building structure (2); 4) implanting a newly added pile (4) at the determined specific position, fixing a corbel (5) corresponding to the newly added pile (4) on the shear wall (3), and supporting the corbel (5) on the newly added pile (4) by a rotating seat.

6. The method for arranging an emergency anti-sinking device on one side outside an existing building according to claim 5 is characterized in that: Before determining the position of the newly added piles (4), the static reaction force of the foundation of each foundation in the existing building structure (2) in the original foundation soil and the increased reaction force after adding the newly added piles (4) are calculated, and the installation position of the bracket (5) and the reinforcement parameters of the original shear wall (3) in the existing building structure (2) are determined.

7. The method for emergency anti-sinking arranged on one side outside an existing building according to claim 5 is characterized in that: Before the newly added piles (4) are implanted, the compression resistance, punching resistance, shear resistance and bending resistance of the corbels (5) and shear walls (3) are verified.

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