Seismic-resistant liftable rigid-flexible composite foundation

Abstract

This invention discloses a seismically resistant, liftable rigid-flexible composite foundation, comprising, from bottom to top, a reaction foundation, a damping foundation, an isolation layer, and an adjustable foundation. Both the reaction foundation and the adjustable foundation are made of flexible foundation materials. The damping foundation is made of rigid foundation materials and includes several horizontally alternating removable damping foundation units and several load-bearing damping foundation units. The isolation layer is made of a high-toughness, waterproof molecular material. When repair is needed, the isolation layer and the adjustable foundation are removed. Then, all removable damping foundation units are dismantled, and jacking equipment is installed at the locations where the removable damping foundation units were removed. The building structure is then lifted and leveled using the jacking equipment, while the damping foundation is gradually raised and reinforced to a new height. Finally, the isolation layer and the adjustable foundation are backfilled. The application of this invention effectively protects the superstructure from damage, greatly improving the safety of life and property.

Description

Technical Field

[0001] This invention relates to the field of building / structure foundation construction technology, and particularly to earthquake-resistant, liftable rigid-flexible composite foundations. Background Technology

[0002] Geological hazards are frequent in underground mining areas and seismically active zones. Ground subsidence in mining goaf areas is prolonged and unstable; seismically active zones experience high intensity and numerous secondary disasters. In these areas, surface buildings and structures suffer severe subsidence, cracking, or damage, rendering the surface unsuitable for construction and posing a serious threat to life and property. Therefore, seismic design of buildings and structures has always been a key research issue during the design phase.

[0003] Currently, the following technical methods exist for addressing the site selection issues of the aforementioned building and construction projects:

[0004] ① Relocate people from the disaster area. This is the main method, but its disadvantages are high economic cost, long time consumption, and serious waste of land resources.

[0005] ② Designed according to the seismic intensity zoning and specifications, this design is mainly used for earthquake prevention in engineering. It avoids disaster geological zones in the construction site selection, optimizes the seismic resistance concept, adopts flexible foundations, and sets up seismic isolation layers and strengthens column-beam joints and other technical solutions for the building structure.

[0006] The drawback is that seismic waves must be absorbed by the entire structure, and flexible foundations cannot reduce seismic energy. Existing technologies lack design considerations during the construction phase for the repair of subsidence or post-earthquake projects, and there is a lack of systematic and safe methods for the protection of engineering projects in ground subsidence areas.

[0007] Therefore, ensuring safe use during disasters and restoring functionality after disasters, as well as protecting life and property and utilizing land resources, have become technical problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0008] In view of the above-mentioned deficiencies of the prior art, the present invention provides an earthquake-resistant, liftable rigid-flexible composite foundation, the purpose of which is to ensure safe use during disasters and functional restoration after disasters, and to protect the safety of life and property and the utilization of land resources.

[0009] To achieve the above objectives, the present invention discloses an earthquake-resistant liftable rigid-flexible composite foundation, which, from bottom to top, includes a reaction foundation, a damping foundation, an isolation layer, and an adjustable foundation.

[0010] Both the reaction foundation and the lifting foundation are made of flexible foundation materials;

[0011] The damping foundation is made of rigid foundation material and includes several removable damping foundation units and several load-bearing damping foundation units.

[0012] Several of the removable damping foundation units and several of the load-bearing damping foundation units are alternately arranged along the horizontal direction;

[0013] The isolation layer is made of a high-toughness waterproof molecular material;

[0014] The horizontal adjustment base is connected to the column as a whole, serving as the foundation of the column;

[0015] When repairs are needed after subsidence or earthquakes that cause settlement, tilting, cracking, or other damage to the project, the isolation layer and the lifting foundation shall be removed.

[0016] Then, all the removable damping foundation units are removed, and jacking equipment is installed at the locations where the removable damping foundation units are removed.

[0017] Then, the building structure is lifted and leveled using the lifting equipment, while the vibration damping foundation is gradually raised and built to a new height.

[0018] Finally, the isolation layer and the adjustment base are backfilled.

[0019] Preferably, the reaction foundation is a strip foundation, isolated foundation, cross foundation under column, raft foundation, box foundation, or pile foundation consisting of several length units, area units, or number of units.

[0020] Preferably, the planar shape of the damping foundation, the isolation layer, and the lifting foundation is consistent with the top planar shape and size of the reaction foundation.

[0021] Preferably, on the basis of the adjustment, a wall is provided between every two columns, an indoor floor is provided on the inner side of the wall, and a drainage system is provided on the outer side of the wall;

[0022] The lifting foundation is firmly connected to both the column and the wall;

[0023] The drainage apron needs to be removed before the isolation layer and the lifting foundation are excavated.

[0024] After backfilling the isolation layer and the lifting foundation, the drainage system also needs to be restored.

[0025] More preferably, if the lifting foundation, the column, and the wall are made of the same material, they are constructed as a whole.

[0026] More preferably, the indoor floor surface layer is at the building elevation ±0.00, and its elevation is not lower than the upper surface of the lifting foundation.

[0027] Preferably, a foundation is provided below the reaction foundation; the foundation is subjected to dynamic compaction and cushion layer treatment.

[0028] Preferably, the reaction foundation, the damping foundation, the isolation layer, and the lifting foundation are all strip foundations, independent foundations, cross foundations under columns, raft foundations, or box foundations, and all include a planar shape adapted to the pile foundation cap.

[0029] The beneficial effects of this invention are:

[0030] The application of this invention can protect the superstructure from damage, greatly improving the level of safety for life and property.

[0031] This invention can ensure safe use during disasters and functional recovery after disasters, avoid and reduce the relocation of disaster site projects, create a way for the engineering utilization of surface land resources in mining subsidence areas, effectively improve the efficiency of land resource utilization, and reduce economic construction losses.

[0032] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0033] Figure 1 A schematic cross-sectional view of the inner side of the wall is shown in one embodiment of the present invention.

[0034] Figure 2 This diagram shows a cross-sectional view of the outer side of the wall in one embodiment of the present invention.

[0035] Figure 3 A side view of an embodiment of the present invention is shown.

[0036] Figure 4 This diagram illustrates the structure of a removable shock-absorbing foundation unit replaced with a lifting device according to an embodiment of the present invention. Detailed Implementation

[0037] Example: Figures 1 to 4 As shown, the seismic-resistant liftable rigid-flexible composite foundation includes, from bottom to top, a reaction foundation 2, a damping foundation 3, an isolation layer 4, and an adjustable foundation 5;

[0038] Both the reaction foundation 2 and the lifting foundation 5 are made of flexible foundation materials;

[0039] The damping foundation 3 is made of rigid foundation material and includes several removable damping foundation units 302 and several load-bearing damping foundation units 301.

[0040] Several removable damping foundation units 302 and several load-bearing damping foundation units 301 are alternately arranged along the horizontal direction;

[0041] The isolation layer 4 is made of a high-toughness waterproof molecular material;

[0042] The foundation 5 is horizontally connected to column 6 to form a whole, serving as the foundation for column 6;

[0043] When repairs are needed after subsidence or earthquakes have occurred, causing settlement, tilting, cracking, or other damage to the project, the isolation layer 4 and the lifting foundation 5 shall be removed.

[0044] Then, all removable damping foundation units 302 are removed, and jacking equipment 10 is installed at the locations where the removable damping foundation units 302 are removed.

[0045] Then, the building structure is lifted and leveled using 10 jacking devices, while the vibration damping foundation 3 is gradually raised and built to a new height.

[0046] Finally, backfill the isolation layer 4 and adjust the foundation 5.

[0047] This invention employs a composite structure consisting of a reaction foundation 2 made of flexible base material and a height-adjustable foundation 5 sandwiching a damping foundation 3 made of rigid base material, separated by an isolation layer 4. In the event of subsidence or earthquakes, the damping foundation 3 is destroyed before the superstructure, dissipating seismic wave energy; the isolation layer 4 isolates the transmission of seismic shear waves upwards; and the height-adjustable foundation 5 provides overall protection for the superstructure, thus protecting it from damage. This invention significantly improves the safety of life and property.

[0048] When surface engineering subsidence occurs in the mining area or earthquakes cause damage to buildings and structures such as settlement, tilting, and cracking, and repairs are needed, the following steps can be taken: remove the drainage ditch 8, excavate the isolation layer 4 and the lifting foundation 5, remove the removable damping foundation unit 302, install the jacking equipment 10, and then use the jacking equipment 10 to lift and level the building and structure. After adding the damping foundation 3 to the new height, backfill the isolation layer 4 and the lifting foundation 5, and then rebuild the drainage ditch 8 to restore the functionality of the project.

[0049] This invention systematically arranges the entire life cycle of building construction projects before and after a disaster, ensuring safe use during a disaster and functional recovery after the disaster, avoiding and reducing the relocation of projects in disaster areas, creating a way for the engineering utilization of surface land resources in mining subsidence areas, effectively improving the efficiency of land resource utilization, and reducing economic construction losses.

[0050] In some embodiments, the reaction foundation 2 is a strip foundation, isolated foundation, cross foundation under column, raft foundation, box foundation, or pile foundation consisting of several length units, area units, or number of units.

[0051] In some embodiments, the planar shape of the damping base 3, the isolation layer 4, and the lifting base 5 is the same as the top planar shape and size of the reaction base 2.

[0052] In some embodiments, a wall 9 is provided between every two columns 6 on the lifting foundation 5, an indoor floor 7 is provided on the inner side of the wall 9, and a drainage ditch 8 is provided on the outer side of the wall 9.

[0053] The foundation 5 is securely connected to both column 6 and wall 9.

[0054] Before excavating the isolation layer 4 and the lifting foundation 5, the drainage ditch 8 also needs to be removed;

[0055] After backfilling the isolation layer 4 and raising the foundation 5, the drainage ditch 8 also needs to be restored.

[0056] In some embodiments, if the foundation 5, column 6 and wall 9 are made of the same materials, they are constructed as a whole.

[0057] In some embodiments, the indoor floor 7 surface layer is at the building elevation ±0.00, and its elevation is not lower than the upper surface of the lifting foundation 5.

[0058] In some embodiments, a foundation 1 is provided below the reaction foundation 2; the foundation 1 is subjected to dynamic compaction and cushion layer treatment.

[0059] In some embodiments, the reaction foundation 2, the damping foundation 3, the isolation layer 4, and the lifting foundation 5 are all strip foundations, isolated foundations, cross foundations under columns, raft foundations, or box foundations, and all include a planar shape adapted to the pile foundation cap.

[0060] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A shock resistant, elevatable, rigid and flexible composite foundation, characterized in that, From bottom to top, it includes reaction foundation (2), damping foundation (3), isolation layer (4) and lifting foundation (5); Both the reaction foundation (2) and the lifting foundation (5) are made of flexible foundation material; The damping foundation (3) is made of rigid foundation material and includes several removable damping foundation units (302) and several load-bearing damping foundation units (301). The removable damping foundation units (302) and the load-bearing damping foundation units (301) are alternately arranged in the horizontal direction; The isolation layer (4) is made of a high-toughness waterproof molecular material; The lifting base (5) is horizontally connected to the column (6) as a whole, serving as the foundation of the column (6); When repairs are needed after subsidence or earthquakes occur, causing settlement, tilting, cracking, or other damage to the project, the isolation layer (4) and the lifting foundation (5) shall be removed. Then, all the removable damping foundation units (302) are removed, and jacking equipment (10) is installed at the locations where the removable damping foundation units (302) are removed. Then, the building structure is lifted and leveled by the lifting equipment (10), and the shock-absorbing foundation (3) is lifted and built to a new height. Finally, the isolation layer (4) and the adjustment base (5) are backfilled.

2. The anti-seismic elevated rigid and flexible composite foundation according to claim 1, characterized in that, The reaction foundation (2) is a strip foundation, independent foundation, cross foundation under column, raft foundation, box foundation or pile foundation consisting of several length units, area units or number of units.

3. The anti-seismic elevated rigid and flexible composite foundation according to claim 1, characterized in that, The planar shape of the damping foundation (3), the isolation layer (4) and the lifting foundation (5) are the same as the top planar shape and size of the reaction foundation (2).

4. The anti-seismic elevated rigid and flexible composite foundation according to claim 1, characterized in that, On the lifting foundation (5), a wall (9) is provided between every two columns (6), an indoor floor (7) is provided on the inner side of the wall (9), and a drainage (8) is provided on the outer side of the wall (9). The lifting foundation (5) is firmly connected to the column (6) and the wall (9); Before excavating the isolation layer (4) and the lifting foundation (5), the drainage apron (8) also needs to be removed. After backfilling the isolation layer (4) and the lifting foundation (5), the drainage (8) also needs to be restored.

5. The anti-seismic raiseable rigid and flexible composite foundation according to claim 4, characterized in that, If the materials used for the lifting foundation (5), the column (6), and the wall (9) are the same, they are constructed as a whole.

6. The anti-seismic raiseable rigid and flexible composite foundation according to claim 4, characterized in that, The indoor floor (7) surface layer is at the building elevation ±0.00, and its elevation is not lower than the upper surface of the lifting foundation (5).

7. The seismic-resistant, liftable rigid-flexible composite foundation according to claim 1, characterized in that, The reaction foundation (2) is provided with a foundation (1) below it; the foundation (1) is subjected to dynamic compaction and cushion layer treatment.

8. The seismic-resistant, liftable rigid-flexible composite foundation according to claim 1, characterized in that, The reaction foundation (2), the damping foundation (3), the isolation layer (4) and the lifting foundation (5) are all strip foundations, independent foundations, cross foundations under columns, raft foundations or box foundations, and all include a planar shape adapted to the pile foundation cap.

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