A basement upper main building flow state solidified soil center diffusion type backfill structure and method thereof

Abstract

The application discloses a ground floor upper main building fluid-solidified soil center diffusion type backfilling structure and a method thereof, and belongs to the technical field of house building construction. The application comprises a fluid-solidified soil preparation equipment main body and a pumping equipment. The fluid-solidified soil preparation equipment main body is connected with the pumping equipment through a conveying pipeline. The output end of the pumping equipment is connected with a pumping pipeline, and the output end of the pumping pipeline extends to the center of a main building backfilling area. The application solves the problems that the existing ground floor upper main building peripheral earthwork backfilling is difficult to compact, and thus the first floor is prone to moisture return mildew and peripheral pipeline brittle earthwork subsidence deformation cracking and the like. The application realizes efficient and compact backfilling of the peripheral fluid-solidified soil of the main building, and the limited space does not need to be compacted, so that the external rainwater is prevented from invading the lower part of the indoor floor, the peripheral pipeline is prevented from cracking due to the backfilling earthwork subsidence, and the construction method is more simple, efficient and reliable. The application greatly reduces the construction cost, improves the earthwork backfilling quality, guarantees the use experience of the first floor occupants, and reduces the later maintenance risk.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically, to a fluidized solidified soil center diffusion backfill structure and method for the main building above the basement. Background Technology

[0002] The area surrounding the main building above the basement contains numerous indoor access pipes, including stormwater and sewage pipes, domestic water supply and fire-fighting water supply pipes, and power and data cable conduits, all buried within the backfill soil of the basement roof slab. Under current technology, it is difficult to backfill and compact the soil in this area, leading to subsequent soil subsidence and pipe collapse, deformation, and even breakage. This severely impacts pipe performance and makes maintenance difficult. Furthermore, existing traditional backfilling techniques, due to the presence of air conditioning slabs, balconies, protruding structural elements, and concealed drainage systems in the main building, often result in insufficient compaction of the backfill soil in this area. This leads to soil subsidence after handover, causing voids at the base of the slab. Rainwater then enters the ground floor of the main building and cannot drain properly, further causing indoor dampness and even mold growth on the decorative layers. Over time, this negatively impacts the building's usability and structural safety. Summary of the Invention

[0003] 1. The technical problem that the invention aims to solve

[0004] To address the shortcomings and deficiencies of existing technologies, this invention provides a center-diffusion backfill structure and method for fluidized solidified soil around the main building in a basement. This invention also provides a construction method for center-diffusion backfilling of fluidized solidified soil around the main building in a basement to prevent pipe floating. This solves problems such as difficulty in compacting the backfill around the main building in existing basement systems, leading to dampness and mold on the first floor, and fragile soil deformation and cracking of surrounding pipes. It achieves efficient and dense backfilling of fluidized solidified soil around the main building, eliminating the need for compaction in confined spaces. This ensures that rainwater does not infiltrate the area below the indoor floor level, and that surrounding pipes do not crack due to soil settling. Furthermore, the construction method is simpler, more efficient, and more reliable, significantly reducing construction costs, improving backfill quality, ensuring a better user experience for first-floor residents, and reducing future maintenance risks.

[0005] 2. Technical Solution

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0007] The present invention discloses a fluidized solidified soil center diffusion backfill structure for the main building above the basement, comprising a fluidized solidified soil preparation equipment body, a pumping equipment, a main building backfill area and a basement backfill area. The fluidized solidified soil preparation equipment body is connected to the pumping equipment through a conveying pipeline. The output end of the pumping equipment is connected to a pumping pipeline, and the output end of the pumping pipeline extends to the center of the main building backfill area.

[0008] The main building backfill area is surrounded by a basement backfill area, and steps are set at the junction of the main building backfill area and the basement backfill area. Water and electricity pipes are arranged in the main building backfill area. Pipe supports are set on the outer surface of the water and electricity pipes. The pipe supports include a support body and a rubber gasket. The support body is erected on the basement roof slab, and a rubber gasket is set at the connection between the support body and the pipe support.

[0009] The pumping pipeline is equipped with a limiting device, which includes a U-shaped ring. The pumping pipeline is placed on the main building beam and fixed by the U-shaped ring.

[0010] Furthermore, the pumping pipeline is made of Q235 straight seam steel pipe with a wall thickness of 4.5mm.

[0011] Furthermore, the pipe support is constructed using solid bricks made of sintered coal gangue, with waterproof mortar applied to the outside. An arc-shaped groove is provided on the upper surface according to the pipe diameter, and a rubber gasket is added between the groove and the pipe to ensure that the pipe fits tightly with the groove of the support and does not shift.

[0012] Furthermore, the limiting device also includes wooden wedges. Wooden wedges are added between the bottom and top of the main building beam and the U-shaped ring to avoid damaging the main concrete structure, while ensuring that the pump pipe does not deviate during the pumping process, thus affecting the pumping quality and efficiency.

[0013] A method for constructing a center-diffusion backfill of fluidized solidified soil for the main building above the basement, based on a center-diffusion backfill structure of fluidized solidified soil for the main building above the basement, comprising the following steps:

[0014] S1. Soil pretreatment: The main soil source is the soil excavated from the foundation pit. The soil excavated must be clay without organic impurities and gravel. Large soil pieces are crushed. Soil with high water content is pretreated by turning and drying or mixing with lime and turning and drying.

[0015] S2. Mixing: First, mix the admixture, curing agent, and water according to the test ratio, and then mix them together with the pretreated soil through a mixer until the resulting fluid soil is uniform and stable, meeting the construction requirements.

[0016] S3. Layered pouring: Due to the presence of water and electricity pipes, the first layer is backfilled to the bottom of the pipes, and the second layer is backfilled to the design elevation. The second layer needs to wait for the lower layer to set before the upper layer is poured.

[0017] S4. Curing: After pouring, cover with plastic film or geotextile for 7-14 days to keep moist and curing, depending on the weather. Increase the frequency of watering when the temperature is high. Use heat insulation covering for winter construction.

[0018] S5. Inspection and Acceptance: After the pouring is completed, test blocks with the same conditions and standard curing are made. Curing can only be stopped and the next construction process can be started after the strength meets the design requirements.

[0019] S6. Construction of the upper floor: After the fluidized solidified soil passes the acceptance test, clean the base layer and carry out the upper construction processes such as steel bar binding and concrete pouring.

[0020] Furthermore, in step S3, the piers must be constructed before backfilling. After the masonry and plastering mortar reach the design strength, the pipes are installed and tested before the construction of the fluidized solidified soil can proceed.

[0021] Furthermore, in step S3, when pumping the first layer, the elevation is strictly controlled by the pumping rate, and the concrete is poured to the lower wall of the pipe with the lowest elevation.

[0022] Furthermore, in step S3, when starting to pump the second layer, the initial pumping rate is appropriately reduced, an appropriate amount of sandbags are added inside the plastic for counterweight, and the elevation of the pipe is closely monitored to avoid the pipe from floating due to excessively fast pumping.

[0023] Furthermore, in step S3, the pump pipe outlet is located at the center of the first layer to ensure that the fluidized solidified soil can flow naturally, symmetrically and uniformly fill the entire backfill area, and ensure physical properties.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0026] 1. Green construction, energy saving and environmental protection: Make the most of the existing construction waste soil, and the soil can be transported in-house without the need for external transportation, which meets the requirements of green construction and reduces the cost of construction waste disposal.

[0027] 2. High construction efficiency and guaranteed functionality: The fluidized solidified soil can flow and fill any corner by its own weight without compaction or vibration, ensuring the backfill quality under beams, around pipes, and under cantilevered components. It also prevents dampness and mold caused by rainwater intrusion under the indoor floor and water leakage caused by pipe dislocation and cracking due to soil subsidence around pipes.

[0028] 3. Outstanding inherent characteristics, cost reduction and efficiency improvement: After the construction of fluidized solidified soil is completed, due to its self-leveling properties, the surface is flat and easy to clean. The upper structure can be constructed without the need for a subbase layer, which improves construction efficiency and reduces construction costs. Attached Figure Description

[0029] Figure 1 This is a construction diagram of the present invention;

[0030] Figure 2This is a schematic diagram of the support structure of the present invention;

[0031] Figure 3 This is a diagram showing the fixed joint between the pumping pipeline and the main structural beam of the present invention.

[0032] Figure 4 This is a schematic diagram of the steps at the junction of the main building and the backfill of the basement roof, according to the present invention.

[0033] In the diagram: 1. Main body of fluidized solidified soil preparation equipment; 101. Conveying pipeline; 2. Pumping equipment; 201. Pumping pipeline; 3. Main building backfill area; 301. Step at the junction; 302. Water and electricity pipelines; 4. Basement backfill area; 401. Step; 5. Pipe support; 501. Support body; 502. Rubber gasket; 503. Basement roof slab; 6. Limiting device; 601. U-shaped ring; 602. Main building crossbeam; 603. Wooden wedge. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0035] Example 1

[0036] from Figure 1-4 As can be seen, the fluidized solidified soil center diffusion backfill structure for the main building above the basement in this embodiment includes a fluidized solidified soil preparation equipment body 1, a pumping equipment 2, a main building backfill area 3, and a basement backfill area 4. The fluidized solidified soil preparation equipment body 1 is connected to the pumping equipment 2 through a conveying pipe 101; the output end of the pumping equipment 2 is connected to a pumping pipe 201, and the output end of the pumping pipe 201 extends to the center of the main building backfill area 3.

[0037] The main body 1 of the fluidized solidified soil preparation equipment and the pumping equipment 2 are arranged along the long side of the main building according to the actual site conditions. While ensuring the normal preparation and pumping of fluidized solidified soil, the length of the pumping pipeline is minimized to ensure the performance of the fluidized solidified soil.

[0038] The fluidized solidified soil pumping pipeline 201, located on the first floor of the main building, is a detachable steel pipeline. This allows for easy adjustment of the pipeline length while ensuring the smooth flow of the pumping pipeline 201 and the stable performance of the fluidized solidified soil.

[0039] The main body 1 of the fluidized solidified soil preparation equipment is made of Q235 welded steel plate and equipped with a slag conveyor metering system, core mixing system, etc. The pumping equipment 2 adopts double-cylinder hydraulic pumping technology. The pumping pipeline 201 is made of Q235 straight seam steel pipe with a wall thickness of 4.5mm. The main specification is 3m sections, matched with corresponding bends and 1m short pipes, which are connected by flange bolts to facilitate the assembly of pumping pipelines of different lengths. At the same time, the steel pumping pipeline can ensure the stability of the fluidized solidified soil during the pumping process. The outlet of the pumping pipeline 201 is located at the physical center of the backfill area of ​​the main building to ensure the stability of the fluidized solidified soil during the pumping process.

[0040] The main building backfill area 3 is surrounded by the basement backfill area 4. Step 401 is set at the junction of the main building backfill area 3 and the basement backfill area 4. Step 401 is reserved during the backfilling stage of the basement roof slab. It serves as both a test point for the compaction degree of the backfilled soil on the basement roof slab and a constraint boundary for pumping the indoor fluidized solidified soil, ensuring that the pumping range is controllable.

[0041] Water and electricity pipes 302 are arranged in the backfill area 3 of the main building; pipe supports 5 are set on the outer surface of the water and electricity pipes 302. The pipe supports 5 include a support body 501 and a rubber gasket 502. The support body 501 is erected on the basement roof slab 503. A rubber gasket 502 is set at the connection between the support body 501 and the pipe supports 5.

[0042] A limiting device 6 is provided on the body of the pumping pipe 201. The limiting device 6 includes a U-shaped ring 601. The pumping pipe 201 is placed on the main building beam 602 and fixed by the U-shaped ring 601.

[0043] Pipe support 5 is constructed with solid bricks made of sintered coal gangue, and the outer side is plastered with waterproof mortar. An arc-shaped groove is left on the upper end according to the pipe diameter, and a rubber gasket 502 is added between the groove and the pipe to ensure that the pipe and the support groove are tightly fitted and do not shift, thus ensuring the necessary pressure resistance and long-term reliability of underground burial.

[0044] The limiting device 6 also includes a wooden wedge 603. Wooden wedges 603 are added between the bottom and top of the main building beam 602 and the U-shaped ring 601 to avoid damage to the main concrete structure, and at the same time to ensure that the pump pipe does not deviate during the pumping process, thus affecting the pumping quality and efficiency.

[0045] Example 2

[0046] from Figure 1-4 As can be seen, the construction method of the center diffusion backfilling of the main building of the basement with fluidized solidified soil in this embodiment is based on a center diffusion backfilling structure of the main building of the basement with fluidized solidified soil. The steps are as follows:

[0047] S1. Soil pretreatment: The main soil source is the soil excavated from the foundation pit. The soil excavated must be clay without organic impurities and gravel. Large soil pieces are crushed. Soil with high water content is pretreated by turning and drying or mixing with lime and turning and drying.

[0048] S2. Mixing: First, mix the admixture, curing agent, and water according to the test ratio, and then mix them together with the pretreated soil through a mixer until the resulting fluid soil is uniform and stable, meeting the construction requirements.

[0049] S3. Layered pouring: Considering that the indoor and outdoor height difference is generally 1.5m, but due to the presence of water and electricity pipe 302, the first layer is backfilled to the bottom of the pipe, and the second layer is backfilled to the design elevation. The second layer needs to wait for the lower layer to set for about 12 hours before the upper layer is poured.

[0050] S4. Curing: After pouring, cover with plastic film or geotextile for 7-14 days to keep moist and curing, depending on the weather. Increase the frequency of watering when the temperature is high. Use heat insulation covering for winter construction.

[0051] S5. Inspection and Acceptance: After the pouring is completed, test blocks with the same conditions and standard curing are made. Curing can only be stopped and the next construction process can be started after the strength meets the design requirements.

[0052] S6. Construction of the upper floor: After the fluidized solidified soil passes the acceptance test, clean the base layer and carry out the upper construction processes such as steel bar binding and concrete pouring.

[0053] In step S3, the piers must be built before backfilling. After the masonry and plastering mortar reach the design strength, the pipes are installed and tested before the construction of the fluidized solidified soil can proceed.

[0054] In step S3, when pumping the first layer, the elevation is strictly controlled by the pumping rate, and the concrete is poured to the lower wall of the pipe with the lowest elevation.

[0055] In step S3, when starting to pump the second layer, the initial pumping rate should be appropriately reduced, an appropriate amount of sandbags should be added inside the plastic for counterweight, and the elevation of the pipe should be closely monitored to avoid the pipe from floating due to excessively fast pumping.

[0056] In step S3, the pump pipe outlet is set at the center of the first floor to ensure that the fluidized solidified soil can flow naturally, symmetrically and evenly fill the entire backfill area, and ensure physical properties.

[0057] This invention provides a method for backfilling a main building in a basement using a fluidized solidified soil center diffusion system to prevent pipes from floating. This method solves problems such as difficulty in compacting existing backfill around the main building in basements, leading to dampness and mold on the ground floor, and fragile soil causing deformation and cracking of surrounding pipes. It achieves efficient and dense backfilling of the main building using fluidized solidified soil, eliminating the need for compaction in confined spaces. This ensures that rainwater does not infiltrate the area beneath the indoor floor, and that surrounding pipes do not crack due to soil settling. Furthermore, the construction method is simpler, more efficient, and more reliable, significantly reducing construction costs, improving backfill quality, ensuring a better user experience for ground-floor residents, and reducing future maintenance risks.

[0058] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A fluidized solidified soil center diffusion backfill structure for a main building above a basement, comprising a fluidized solidified soil preparation equipment (1), a pumping device (2), a main building backfill area (3), and a basement backfill area (4), characterized in that: The main body (1) of the fluidized solidified soil preparation equipment is connected to the pumping equipment (2) through the conveying pipe (101); the output end of the pumping equipment (2) is connected to the pumping pipe (201), and the output end of the pumping pipe (201) extends to the center of the backfill area (3) of the main building; The main building backfill area (3) is surrounded by a basement backfill area (4), and a step (401) is set at the junction of the main building backfill area (3) and the basement backfill area (4); water and electricity pipes (302) are arranged in the main building backfill area (3); pipe supports (5) are set on the outer surface of the water and electricity pipes (302), and the pipe supports (5) include a support body (501) and a rubber gasket (502). The support body (501) is erected on the basement roof slab (503), and a rubber gasket (502) is set at the connection between the support body (501) and the pipe supports (5). The pumping pipe (201) is provided with a limiting device (6) on its body. The limiting device (6) includes a U-shaped ring (601). The pumping pipe (201) is placed on the main building beam (602) and fixed by the U-shaped ring (601).

2. The fluidized solidified soil center diffusion backfill structure for the main building above the basement according to claim 1, characterized in that: The pumping pipeline (201) is made of Q235 straight seam steel pipe with a wall thickness of 4.5mm.

3. The fluidized solidified soil center diffusion backfill structure for the main building above the basement according to claim 1, characterized in that: The pipe support (5) is constructed with solid bricks made of sintered coal gangue, and the outer side is plastered with waterproof mortar. An arc-shaped groove is left on the upper end according to the pipe diameter, and a rubber gasket (502) is added between the groove and the pipe to ensure that the pipe and the support groove are tightly fitted and do not shift.

4. The fluidized solidified soil center diffusion backfill structure for the main building above the basement according to claim 1, characterized in that: The limiting device (6) also includes a wooden wedge (603). A wooden wedge (603) is added between the bottom and top of the main building beam (602) and the U-shaped ring (601) to avoid damaging the main concrete and to ensure that the pump pipe does not deviate during the pumping process, thus affecting the pumping quality and efficiency.

5. A construction method for center-diffusion backfilling of fluidized solidified soil for the main building above the basement, based on the center-diffusion backfilling structure of fluidized solidified soil for the main building above the basement as described in claim 1, characterized in that: The steps are as follows: S1. Soil pretreatment: The main soil source is the soil excavated from the foundation pit. The soil excavated must be clay without organic impurities and gravel. Large soil pieces are crushed. Soil with high water content is pretreated by turning and drying or mixing with lime and turning and drying. S2. Mixing: First, mix the admixture, curing agent, and water according to the test ratio, and then mix them together with the pretreated soil through a mixer until the resulting fluid soil is uniform and stable, meeting the construction requirements. S3, Layered pouring: Due to the presence of water and electricity pipes (302), the first layer is backfilled to the bottom of the pipes, and the second layer is backfilled to the design elevation. The second layer needs to wait for the lower layer to set before the upper layer is poured. S4. Curing: After pouring, cover with plastic film or geotextile for 7-14 days to keep moist and curing, depending on the weather. Increase the frequency of watering when the temperature is high. Use heat insulation covering for winter construction. S5. Inspection and Acceptance: After the pouring is completed, test blocks with the same conditions and standard curing are made. Curing can only be stopped and the next construction process can be started after the strength meets the design requirements. S6. Construction of the upper floor: After the fluidized solidified soil passes the acceptance test, clean the base layer and carry out the upper construction processes such as steel bar binding and concrete pouring.

6. The construction method for center-diffusion backfilling of fluidized solidified soil for the main building above the basement according to claim 1, characterized in that: In step S3, the piers must be built before backfilling. After the masonry and plastering mortar reach the design strength, the pipes are installed and tested before the construction of the fluidized solidified soil can proceed.

7. The construction method for center-diffusion backfilling of fluidized solidified soil for the main building above the basement according to claim 1, characterized in that: In step S3, when pumping the first layer, the elevation is strictly controlled by the pumping rate, and the concrete is poured to the lower wall of the pipe with the lowest elevation.

8. The construction method for center-diffusion backfilling of fluidized solidified soil for the main building above the basement according to claim 1, characterized in that: In step S3, when starting to pump the second layer, the initial pumping rate is appropriately reduced, an appropriate amount of sandbags are added inside the plastic for counterweight, and the elevation of the pipe is closely monitored to avoid the pipe from floating due to excessively fast pumping.

9. The construction method for center-diffusion backfilling of fluidized solidified soil for the main building above the basement according to claim 1, characterized in that: In step S3, the pump pipe outlet is located at the center of the first layer to ensure that the fluidized solidified soil can flow naturally, symmetrically and uniformly fill the entire backfill area, and ensure physical properties.

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