Ancient building foundation deviation rectifying system suitable for soft stratum and construction method of ancient building foundation deviation rectifying system

Abstract

The invention discloses an ancient building foundation deviation rectifying system suitable for a soft stratum and a construction method of the ancient building foundation deviation rectifying system, and belongs to the field of green buildings. The deviation correction system comprises a controllable creep settlement unit, the controllable creep settlement unit is located in a bottom stratum of the high side of a building and comprises a water / temperature sensitive soil body layer used for replacing an original bottom soil body of the high side of the building, and a water supply assembly or / and a heating assembly is / are embedded in the water / temperature sensitive soil body layer. The water / temperature sensitive soil body layer is used for humidifying or / and heating the water / temperature sensitive soil body layer, so that the water / temperature sensitive soil body layer is subjected to sedimentation creep deformation. According to the method, the horizontal characteristics of the foundation are recovered in a rock-soil body creep mode, then reinforcement and jacking are conducted in sequence, dependence on the original strength of the foundation is weak, and therefore the method has good applicability to the foundations such as brick foundations, beam foundations and pile foundations.

Description

Technical Field

[0001] The present invention relates to the technical field of green buildings, and more specifically to a foundation correction system for old buildings suitable for soft strata and a construction method thereof. Background Art

[0002] In recent years, with the continuous advancement of urban renewal in my country, not only a large number of old buildings have been demolished, but also many ancient buildings need to be repaired. Unlike the current beam, raft, and pile foundations, ancient buildings generally use brick foundations, and the bricks are bonded together by adhesives. With the extension of the service life of the building, changes in geological conditions, disturbances caused by surrounding construction, and many other factors, the foundations of ancient buildings and the bonding between bricks will be damaged to varying degrees, causing the building to deflect, affecting building safety and cultural heritage. Therefore, it is necessary to reliably and accurately repair the foundations of ancient buildings.

[0003] For example, the patent document with application number 2017107108330 discloses a grouting reinforcement correction method applicable to high-rise building structures, which corrects the building by grouting reinforcement; another example is a grouting composite foundation with adjustable pre-buried steel pipes and its construction method applicable to high-rise building structure reinforcement correction, which corrects the building by precise grouting of grouting steel flower pipes. Grouting method is a common building correction method in the industry. Although it can solve the problem of building correction to a certain extent through grouting jacking, simple grouting correction has poor applicability in practice. Grouting method is more suitable for casting foundation with good integrity, and grouting slurry has a good diffusion effect in high-permeability sand layer, but has poor applicability for low-strength brick foundation and low-permeability clay layer. To this end, the present invention proposes a building correction system and its construction method with better foundation applicability, wider stratum applicability and stronger reliability based on the characteristics of soft strata and old building foundations. Summary of the invention

[0004] 1. Technical problem to be solved by the invention

[0005] In view of the poor applicability of the conventional grouting correction method in the prior art, the present invention intends to provide a correction system for old building foundations suitable for soft strata and a construction method thereof, which can carry out non-destructive, efficient and green repair of old building foundations, and has stronger applicability to building foundations, building strata, etc.

[0006] 2. Technical solution

[0007] In order to achieve the above object, the technical solution provided by the present invention is:

[0008] The present invention discloses a foundation correction system for old buildings in soft strata, which includes a controllable creep settlement unit. The controllable creep settlement unit is located in the bottom stratum on the higher side of the building, and includes a water / temperature sensitive soil layer for replacing the original bottom soil on the higher side of the building. A water supply component and / or a heating component is buried in the water / temperature sensitive soil layer for humidifying and / or heating the water / temperature sensitive soil layer, so that the water / temperature sensitive soil layer undergoes settlement creep.

[0009] Furthermore, it also includes a grouting unit, which is distributed below the controllable creep settlement unit. The grouting unit includes an outer sleeve and an inner sleeve which are nested inside and outside. The inner sleeve includes a grouting head and a slurry pipe. The slurry pipe is used to supply liquid to the grouting head. Grouting holes are provided on the grouting head and the outer sleeve. Traction ropes are also provided at both ends of the grouting head. The traction ropes are used to tow the grouting head to move it in the outer sleeve, so that the grouting holes on the grouting head can be moved to align with the grouting holes at different positions on the outer sleeve, thereby grouting at different positions.

[0010] Furthermore, a guide positioning member is provided between the grouting head and the outer sleeve for controlling the axial translation direction of the grouting head in the outer sleeve.

[0011] Furthermore, it also includes an airbag emergency unit, which is buried below the grouting unit. The airbag emergency unit includes a high-pressure airbag, and the high-pressure airbag is provided with an inlet pipe and an outlet pipe.

[0012] Furthermore, it also includes a distributed sinking aid unit, which includes a water tank arranged at an upper position of the building.

[0013] Furthermore, the distributed sinking aid unit includes multiple groups of water tanks, the multiple groups of water tanks are connected, and at least the lower box body of the water tank is a flexible structure.

[0014] Furthermore, it also includes a horizontal reinforcement unit arranged between the controllable creep settlement unit and the grouting unit, the horizontal reinforcement unit includes horizontally extending and crisscrossed reinforcement bars, and the reinforcement bars together form a support plane above the grouting unit.

[0015] Furthermore, it also includes a mixing pile reinforcement unit, which includes isolation piles surrounding the outside of the building and located under the building foundation, and reaction piles arranged crosswise with the isolation piles. The isolation piles are arranged vertically around the building, and the reaction piles extend obliquely from the outside of the building to the inside under the building foundation, crossing with the isolation piles.

[0016] Furthermore, it also includes an optical fiber monitoring unit, which is arranged around the bottom of the building and is used to monitor the deformation characteristics of the building.

[0017] The present invention also provides a construction method for the above-mentioned old building foundation correction system suitable for soft strata, comprising:

[0018] S1, horizontal drilling, burying the optical fiber monitoring unit;

[0019] S2, excavation construction, completing the construction of the mixing pile reinforcement unit under the building foundation;

[0020] S3, excavation construction, complete the construction of the airbag emergency unit under the building foundation, and connect the press;

[0021] S4, load control, complete the construction of the sinking aid unit on the top of the building and connect the water pump;

[0022] S5, soil replacement, completion of controlled creep settlement unit construction, and start of building correction;

[0023] S6, soil reinforcement, complete the horizontal reinforcement unit construction under the building foundation, and carry out close reinforcement of the building foundation;

[0024] S7, grouting jacking, complete the grouting unit construction under the building foundation, according to the feedback of the optical fiber monitoring unit, cooperate with the airbag emergency unit and the sinking assistance unit to control the building to be lifted smoothly and evenly;

[0025] S8. Close the equipment and use cement slurry to refill the airbag emergency unit. At the same time, slowly remove the airbag emergency unit. If settlement occurs, use the grouting unit to perform secondary grouting construction.

[0026] 3. Beneficial effects

[0027] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0028] (1) The construction method of the present invention has good foundation applicability. The horizontal characteristics of the foundation are restored by creep of the rock and soil mass, and then reinforcement and jacking are performed in sequence. The dependence on the original strength of the foundation is relatively weak. Therefore, the construction method of the present invention has good applicability to brick foundations, beam foundations, pile foundations and other foundations.

[0029] (2) The construction method of the present invention has good stratum applicability: by means of cement soil mixing piles, a foundation with reliable strength is formed; then the creep characteristics of the local replacement soil under the action of temperature and water are used to correct the deviation of the building, and the dependence on the original stratum soil properties is small.

[0030] (3) The construction method of the present invention is highly reliable. It utilizes the creep characteristics of rock and soil to effectively avoid the sudden top-out phenomenon during grouting, thereby improving the reliability of building correction. At the same time, the introduction of emergency airbags prevents sudden deformation of the building caused by soil holes during the correction process.

[0031] (4) The construction method of the present invention has little environmental pollution. During the construction process, only a small amount of cement slurry is used in the final overall jacking process, which reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the deviation correction system in the embodiment;

[0033] Figure 2 Schematic diagram of the distribution state of isolation piles in the embodiment;

[0034] Figure 3 Schematic diagram of the distribution state of reaction piles in the embodiment.

[0035] Explanation of the symbols in the schematic diagram:

[0036] 1. Distributed sinking aid unit; 11. Water tank; 2. Fiber optic monitoring unit; 3. Controllable creep settlement unit; 4. Horizontal reinforcement unit; 5. Grouting unit; 51. Outer casing; 52. Inner casing; 6. Airbag emergency unit; 7. Mixing pile reinforcement unit; 71. Isolation pile; 72. Reaction pile. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] The present invention will be further described below in conjunction with the embodiments.

[0040] Example

[0041] Combination Figure 1-Figure 3 The present embodiment is a foundation correction system for old buildings in soft strata, including a controllable creep settlement unit 3, which is located in the bottom stratum on the higher side of the building, and includes a water / temperature sensitive soil layer for replacing the original bottom soil on the higher side of the building. A water supply component and / or a heating component is buried in the water / temperature sensitive soil layer for humidifying and / or heating the water / temperature sensitive soil layer, so that the water / temperature sensitive soil layer undergoes settlement creep.

[0042] In practice, the soil is dug under the high position of the building, and the original bottom soil is replaced with a controllable creep settlement unit 3. The controllable creep settlement unit 3 can use a loess layer with relatively fine particles. Loess has significant collapsibility and temperature creep. That is, the original bottom soil is replaced with loess. Loess will shrink in volume when it meets water and heat. When the soil is mixed with water, the volume will shrink by 5% to 40%; under heating conditions, the volume of the soil will shrink by about 5% to 30%. The water supply component and the heating component can be set separately or at the same time. The specific water supply component can be selected from multiple water injection pipes with local capillary openings, and the heating component can be selected from waterproof and sealed heating copper wires. After the loess is replaced piece by piece at the bottom of the building, dripping or heating operations are performed in the loess layer through water injection pipes or heating copper wires. The reduction in the volume of loess will help the high side of the building to settle downward, so that the high side of the building will first settle downward to a certain plane, and then the overall lifting method is adopted. And through the controllable creep settlement unit 3, the deformation of the local area of ​​the soil can be controlled by precise control of water and temperature, and then the deformation of the building can be controlled slowly and reliably. Compared with the traditional direct soil excavation method, this method is softer and will not cause sudden settlement. It allows engineers to have more reaction time and gives the foundation more time to coordinate deformation, which will have a better effect.

[0043] The present embodiment also includes a grouting unit 5, which is distributed below the controllable creep settlement unit 3. Specifically, the grouting unit 5 includes an outer sleeve 51 and an inner sleeve 52 which are nested inside and outside. The inner sleeve 52 includes a grouting head and a slurry pipe. The slurry pipe is used to supply liquid to the grouting head. Grouting holes are provided on the grouting head and the outer sleeve 51. A traction rope is also provided at both ends of the grouting head. The traction rope is used to tow the grouting head to move it in the outer sleeve 51, so that the grouting holes on the grouting head can be moved to align with the grouting holes at different positions on the outer sleeve 51, thereby grouting at different positions.

[0044] Furthermore, a guide positioning member is provided between the grouting head and the outer sleeve 51, which is used to control the axial translation direction of the grouting head in the outer sleeve 51. Specifically, the guide groove limit block can be used, which will not be described in detail, to prevent the grouting head from rotating in the outer sleeve 51. In practice, the outer sleeve 51 is made of HDPE material, which has sufficient strength and toughness. The outer sleeve 51 surface has multiple opening holes as grouting holes. A short grouting head is matched inside the long outer sleeve 51. There is basically no gap between the outer sleeve 51 and the grouting head, and the slurry will not flow into the inner and outer gap spaces. The position of the grouting head in the outer sleeve 51 is controlled by pulling the traction ropes at both ends of the grouting head, so that the grouting holes on the grouting head correspond to the grouting holes at different positions on the outer sleeve 51. The slurry enters the grouting head through the slurry pipe and is discharged through the outer sleeve 51. Thus, grouting can be performed for each point, which is more uniform and quantitative. The grouting head and the outer sleeve 51 can be surrounded by multiple groups of grouting holes to achieve comprehensive grouting. This precise grouting method can effectively alleviate the problem of uncontrollable diffusion of traditional grouting slurry. For example, the traditional grouting pipe has a high pressure at the beginning, and the pressure loss increases as time goes on, resulting in a smaller grouting pressure, which leads to different grouting layer thicknesses. At the same time, in a weak silt layer, the slurry is prone to splitting, causing the grouting pressure to suddenly increase or decrease, which can easily damage the building. The double-tube precise grouting method of this embodiment can ensure uniform and quantitative grouting and avoid the problem of grouting splitting in the silt layer.

[0045] It can be further optimized that the present embodiment also includes an optical fiber monitoring unit 2, which is arranged around the bottom of the building to monitor the deformation characteristics of the building. Specifically, the optical fiber monitoring unit 2 is distributed using a through-length optical fiber, with only one optical fiber, arranged in a circle around the outside and crisscrossed, which can accurately reflect the deformation characteristics of the building.

[0046] It can be further optimized that the present embodiment also includes a distributed sinking aid unit 1, which includes a water tank 11 arranged at the upper part of the building. Preferably, multiple groups of water tanks 11 can be arranged, and the multiple groups of water tanks 11 can be connected. For example, a water pump is arranged to connect them in sequence. The water tanks 11 can be stacked around the top of the building or inside the building. When the controllable creep settlement unit 3 creeps too slowly, the water tank 11 is used to apply gravity to help sinking. Compared with sandbags, the load of the water unit is relatively uniform, which helps to minimize additional damage to the foundation of the building. At the same time, the water tanks 11 can flexibly pump water to each other through water pumps. The higher position of the building can pump more water to increase the weight and help balance. The control efficiency of the additional load of the building is relatively high. Further, at least the lower box body of the water tank 11 is controlled to be a flexible structure. Preferably, the upper box body of the water tank 11 adopts a rigid structure, and the lower box body adopts a flexible structure, which not only ensures the uniform construction load on the foundation of the building, but also prevents the capsule from being flattened when there is too much water and affecting the surrounding buildings.

[0047] It can be further optimized that the present embodiment also includes a horizontal reinforcement unit 4 disposed between the controllable creep settlement unit 3 and the grouting unit 5. The horizontal reinforcement unit 4 includes horizontally extending and crisscrossed reinforcement bars, which together form a support plane above the grouting unit 5. The horizontal reinforcement unit 4 is distributed below the controllable creep settlement unit 3 to ensure that the building foundation forms a stable plane as a whole, so that the slurry of the grouting unit 5 below lifts the bottom of the entire building, rather than a part, to prevent secondary damage, thereby ensuring that the building rises as a whole and evenly. In practice, the horizontal reinforcement unit 4 can be made of a mixture of cement and soil, which has a certain strength and presents a "well"-shaped distribution feature in space.

[0048] It can be further optimized that the present embodiment also includes an airbag emergency unit 6, which is buried under the grouting unit 5. The airbag emergency unit 6 includes a high-pressure airbag, and the high-pressure airbag has an inlet pipe and an outlet pipe. By burying the airbag emergency unit 6 in the lower part of the building foundation and being connected to the air compression pump, the high-pressure airbag has an inlet and outlet double-tube structure, which is used to fill air into the high-pressure airbag during the construction process. When the airbag is sealed after the construction is completed, a pipe is used to inject slurry into the high-pressure airbag, and a pipe is used to discharge air to ensure the construction effect. The airbag emergency unit 6 is arranged at the lower part of the grouting unit 5. When the building settles too quickly, air or water is promptly filled into the high-pressure airbag to support the building foundation, alleviate the situation of too fast settlement, ensure its stable settlement, and avoid damage to the building.

[0049] It can be further optimized that the present embodiment also includes a mixing pile reinforcement unit 7, which is cross-arranged under the building foundation and is constructed using cement soil mixing piles. Specifically, the mixing pile reinforcement unit 7 includes isolation piles 71 surrounding the outer side of the building and located under the building foundation, and reaction piles 72 cross-arranged with the isolation piles 71. Figure 2 FIG. 1 is a schematic diagram showing a state where isolation piles 71 are arranged vertically around a building, and multiple layers of isolation piles 71 may be provided inside and outside. Figure 3 The figure shows the distribution state of the reaction piles 72 . The reaction piles 72 extend obliquely from the outside of the building to the inside under the building foundation and intersect with the isolation piles 71 .

[0050] In practice, the isolation piles 71 are used to distribute around the building for protection. Early construction is necessary to prevent damage to surrounding buildings during the building correction process. The mixing pile reinforcement unit 7 must use cement soil mixing piles, because bored piles need to be drilled first and then piled, which will cause disturbance to the surrounding area. The foundations of old buildings are relatively fragile, so disturbances to surrounding buildings should be avoided as much as possible. High-pressure rotary jet piles cannot be used either, because the foundation is weak, generally low-permeability soil such as silt, so the slurry of the high-pressure rotary jet pile is difficult to mix evenly with the low-permeability soil, and the isolation effect of the packaged pile body cannot be achieved; cement soil mixing piles use forced mixing to evenly mix the cement slurry with the soil, and have good pile quality.

[0051] In practice, cement-soil mixing piles should be constructed at intervals. For example, when constructing isolation pile 71, the inner side should be constructed first, and after the cement soil strength is increased after 7 days, the outer side should be constructed. The distance between the two should be controlled at 300 to 1200. If the distance is too close, the later piles may hit the earlier piles, causing damage and damaging the drilling rig; if the distance is too far, the integrity between the walls will be poor and the isolation effect will be weakened. And isolation pile 71 generally adopts triaxial cement-soil mixing piles, such as Figure 2 As shown, the construction must be done inside first and outside later. If it is done outside first and inside later, the extrusion generated by the construction of the isolation pile 71 cannot be released to the outside, and the ancient building can only be squeezed inward, which will disturb the foundation of the ancient building that needs to be repaired; it is better to start with the inside and thicken the outside, so that the squeezing force can be released to both the inside and the outside at the same time.

[0052] In practice, the reaction piles 72 are driven obliquely at the bottom of the building, showing a grid-like arrangement feature, and their main function is to ensure that the deep soil can provide reliable upward reaction force during the jacking process of cement slurry, and prevent the slurry from suddenly leaking into the deep stratum, resulting in jacking failure. Similarly, the reaction piles 72 also use cement soil mixing pile technology.

[0053] This embodiment also provides a construction method for the above-mentioned old building foundation correction system applicable to soft strata, firstly geological survey, design a reasonable correction technical solution, and then specific construction, including:

[0054] S1, horizontal drilling, burying the optical fiber monitoring unit 2;

[0055] S2, excavation construction, complete the construction of the mixing pile reinforcement unit 7 under the building foundation; it should be noted that the construction of the horizontal reinforcement unit 4 in step S6 can also be constructed at this time, and the construction of the mixing pile reinforcement unit 7 and the horizontal reinforcement unit 4 can be completed together;

[0056] S3, excavation construction, complete the construction of the airbag emergency unit 6 under the building foundation, and connect the press;

[0057] S4, load control, complete the construction of the sinking aid unit 1 on the top of the building and connect the water pump;

[0058] S5, soil replacement, completion of controlled creep settlement unit 3 construction, and start of building correction;

[0059] S6, soil reinforcement, completing the construction of horizontal reinforcement unit 4 under the building foundation, and performing close reinforcement on the building foundation;

[0060] S7, grouting and lifting, complete the construction of grouting unit 5 under the building foundation, and according to the feedback of optical fiber monitoring unit 2, cooperate with airbag emergency unit 6 and sinking aid unit 1 to control the building to lift steadily and evenly;

[0061] S8. The equipment is closed and cement slurry is used to refill the airbag emergency unit 6. At the same time, the airbag emergency unit 6 is slowly removed. If settlement occurs, the grouting unit 5 is used for secondary grouting construction.

[0062] The above is a schematic description of the present invention and its implementation mode, which is not restrictive and is only one of the implementation modes of the present invention, and is not actually limited thereto. Therefore, if a person skilled in the art is inspired by it and, without departing from the purpose of the invention, designs a structure and an implementation mode similar to the technical solution without creativity, they shall all fall within the protection scope of the present invention.

Claims

1. A foundation correction system for old buildings in soft strata, characterized by: The invention comprises a controllable creep settlement unit (3), which is located in the bottom stratum at the higher side of the building, and comprises a water / temperature sensitive soil layer for replacing the original bottom soil at the higher side of the building, wherein a water supply component and / or a heating component are buried inside the water / temperature sensitive soil layer, and are used to humidify and / or heat the water / temperature sensitive soil layer, so that the water / temperature sensitive soil layer undergoes settlement creep.

2. The foundation correction system for old buildings in soft strata according to claim 1 is characterized by: It also comprises a grouting unit (5), which is distributed below the controllable creep settlement unit (3), and the grouting unit (5) comprises an outer sleeve (51) and an inner sleeve (52) which are nested inside and outside, and the inner sleeve (52) comprises a grouting head and a slurry pipe, and the slurry pipe is used to supply liquid into the grouting head; the grouting head and the outer sleeve (51) are both provided with grouting holes, and traction ropes are also provided at both ends of the grouting head, and the traction ropes are used to traction the grouting head to move it in the outer sleeve (51), so that the grouting holes on the grouting head can be moved to align with the grouting holes at different positions on the outer sleeve (51), thereby grouting at different positions.

3. The foundation correction system for old buildings in soft strata according to claim 2 is characterized by: A guide positioning member is also provided between the grouting head and the outer sleeve (51) for controlling the axial translation direction of the grouting head in the outer sleeve (51).

4. The foundation correction system for old buildings in soft strata according to claim 2 is characterized by: It also includes an airbag emergency unit (6), which is buried below the grouting unit (5). The airbag emergency unit (6) includes a high-pressure airbag, and the high-pressure airbag is provided with an inlet pipe and an outlet pipe.

5. The foundation correction system for old buildings in soft strata according to claim 2 is characterized by: It also comprises a distributed sinking aid unit (1), which comprises a water tank (11) arranged at an upper position of the building.

6. The foundation correction system for old buildings in soft strata according to claim 5 is characterized by: The distributed sinking aid unit (1) comprises a plurality of groups of water tanks (11), the plurality of groups of water tanks (11) are connected to each other, and at least the lower box body of the water tank (11) is a flexible structure.

7. The foundation correction system for old buildings in soft strata according to claim 4 is characterized by: It also includes a horizontal reinforcement unit (4) arranged between the controllable creep settlement unit (3) and the grouting unit (5), the horizontal reinforcement unit (4) including reinforcement bars extending horizontally and distributed in a crisscross pattern, the reinforcement bars together forming a support plane above the grouting unit (5).

8. The foundation correction system for old buildings in soft strata according to any one of claims 1 to 7, characterized in that: The invention also comprises a mixing pile reinforcement unit (7), the mixing pile reinforcement unit (7) comprising isolation piles (71) surrounding the outer side of the building and located under the building foundation, and reaction piles (72) arranged crosswise with the isolation piles (71), the isolation piles (71) being arranged vertically around the building, and the reaction piles (72) extending obliquely from the outer side of the building to the inner side under the building foundation, and crossing with the isolation piles (71).

9. The foundation correction system for old buildings in soft strata according to any one of claim 8, characterized in that: It also comprises an optical fiber monitoring unit (2), which is arranged around the bottom of the building and is used to monitor the deformation characteristics of the building.

10. A construction method for a foundation correction system for old buildings in soft strata, characterized in that: include: S1, drilling horizontally and burying the optical fiber monitoring unit (2); S2, excavation construction, completing the construction of the mixing pile reinforcement unit (7) under the building foundation; S3, excavation construction, complete the construction of the airbag emergency unit (6) under the building foundation, and connect the press; S4, load control, completing the construction of the sinking aid unit (1) on the top of the building and connecting the water pump; S5, soil replacement, completion of the construction of the controlled creep settlement unit (3), and start of building correction; S6, soil reinforcement, completing the construction of horizontal reinforcement unit (4) under the building foundation, and performing close reinforcement on the building foundation; S7, grouting and lifting, completing the construction of the grouting unit (5) under the building foundation, and according to the feedback of the optical fiber monitoring unit (2), cooperating with the airbag emergency unit (6) and the sinking aid unit (1) to control the building to be lifted steadily and evenly; S8. The equipment is closed and cement slurry is used to refill the airbag emergency unit (6). At the same time, the airbag emergency unit (6) is slowly removed. If settlement occurs, a secondary grouting construction is performed using the grouting unit (5).

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