A construction method for opening a hole in the basement floor of an existing building to reduce water and pressure

Abstract

The invention discloses a construction method for opening a hole to reduce water and pressure in the basement floor of an existing building, step 1: using a drilling machine to open a hole in the structural floor of the basement for the first time, and not to penetrate the structural floor of the basement; step 2: installing a prefabricated steel casing in the structural hole, and injecting structural adhesive into the gap between the steel casing and the structural hole for bonding; step 3: installing a drainage steel pipe equipped with a valve into the steel casing; step 4: continuing to use the drilling machine to open a second hole in the structural floor of the basement until the structural floor of the basement is penetrated; step 5: externally connecting an elbow and a hose to the drainage steel pipe; step 6: after the drainage and pressure relief is completed, the drainage steel pipe, elbow and hose are removed, epoxy resin is injected into the steel casing to fill the hole, and the steel cover plate is welded to the top outer edge of the steel casing. The invention does not need to dig a precipitation well, has a fast construction speed and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction method for opening a hole in a basement floor of an existing building to reduce water and release pressure. Background Art

[0002] For some special reasons, it is possible that a house with a basement needs to have holes drilled in the basement structure to reduce water and relieve pressure. For example, as the water pressure increases due to the rising groundwater level, the basement floor will float up when the water buoyancy is greater than the upper pressure. At this time, the fastest and most effective way is to drill holes in the underground floor to release the water pressure and avoid increasing floating. For another example, due to the change of the use function of the house or the need to add floors or reinforce dangerous houses, the foundation of the house often needs to be reinforced. The commonly used method is to reinforce the foundation by piling, such as reinforcing steel pipe piles under the basement floor. To pile under the built basement floor, holes must first be drilled in the underground floor to remove the concrete structure of the floor before piling can be driven into the foundation soil. However, due to the presence of groundwater, directly opening the floor will cause groundwater and mud to flow into the basement, which is not conducive to piling operations. Therefore, it is necessary to drill holes in the floor to reduce water and relieve pressure before drilling holes and piling.

[0003] In the above situations, it is necessary to drill a hole in the basement floor for precipitation and pressure relief, that is, to drill a precipitation and pressure relief hole. The usual method is to first drill a hole in the basement floor, then use a drilling rig to drill a hole in the soil, place a corrugated filter pipe, and the corrugated filter pipe is wrapped with a filter mesh cloth, and then filled with stones. Then put a water pump in the corrugated pipe to pump water, that is, the precipitation well method. This method has the following shortcomings: ① If the groundwater pressure is large, at this time, after the basement floor hole is opened, groundwater and mud and sand will flow into the basement, causing unnecessary losses; ② The precipitation well construction time is long, and a large amount of soil and garbage is generated; ③ The floor hole is difficult to close after use and is prone to leakage; ④ The cost is high.

[0004] To this end, the present invention provides a construction method for opening a hole in the basement floor of an existing building to reduce water and release pressure. Summary of the invention

[0005] In order to solve the risks and shortcomings of the above-mentioned prior art, the present invention proposes a construction method for opening a hole in the basement floor of an existing building to reduce water and relieve pressure.

[0006] The technical solution of the present invention is as follows:

[0007] A construction method for opening a hole in the basement floor of an existing building to reduce water and pressure, comprising the following steps:

[0008] Step 1: Use a drilling machine to drill a hole in the basement structure floor for the first time without drilling through the basement structure floor to form a structural hole;

[0009] Step 2: Install the prefabricated steel casing in the structural hole, inject structural adhesive into the gap between the steel casing and the structural hole for bonding, and anchor the steel casing to the structural bottom plate (the plane of the structural bottom plate) with anchor bolts;

[0010] Step 3: Install the drainage steel pipe with valve into the steel casing and keep the valve in the open state;

[0011] Step 4: Continue to drill a second hole in the basement's structural floor plate with the drilling rig until the basement's structural floor plate is penetrated; pour filter stones into the drainage steel pipe and put in the filter plate and immediately close the valve;

[0012] Step 5: Connect an elbow and a hose to the drainage steel pipe, connect the hose to the water collection well, and open the valve to drain and release the pressure;

[0013] Step 6: After the drainage and pressure relief are completed, remove the drainage steel pipe, elbow and hose, inject epoxy resin into the steel casing to fill the hole, and weld the steel cover plate to the top outer edge of the steel casing to close the hole. Then the building surface layer can be constructed.

[0014] Furthermore, in step 1, a 100-110 mm thick space must be reserved for the structural base plate without being penetrated. This is to prevent groundwater from pouring into the basement after penetration, making it difficult to drain water centrally, which is not conducive to improving construction efficiency.

[0015] Furthermore, in step 2, the diameter of the steel casing is 4-6 mm smaller than the structural hole, so that a glue injection gap A is formed between the steel casing and the structural hole; the height of the steel casing is 4-6 mm larger than the depth of the structural hole, so that a glue injection gap B is formed between the top outer edge of the steel casing and the structural bottom plate, and the glue injection gap B is connected to the glue injection gap A, so that the structural glue can be directly injected from the glue injection gap B, and the structural glue enters the glue injection gap A from the glue injection gap B, thereby filling the entire gap.

[0016] Furthermore, in step 3, the steel casing and the drainage steel pipe are installed by threaded fitting, that is, they are detachably fitted by thread, which facilitates the disassembly and assembly of the drainage steel pipe.

[0017] Furthermore, in step 3, the valve is arranged at the side of the drainage steel pipe, and when the valve core of the valve is in the open state, a vertical flow channel is formed inside the drainage steel pipe, which can ensure the subsequent second hole drilling and water filter layer construction.

[0018] Furthermore, in step 4, the aperture of the second hole should be smaller than the aperture of the first hole, so as to ensure that a funnel-shaped structure is formed inside the structural floor of the basement, which is convenient for the construction of the water filtration layer and can prevent groundwater from gushing upward quickly.

[0019] Design idea: In order to prevent groundwater from pouring into the basement after the bottom plate hole is opened, it is necessary to form an organized drainage channel after opening, and the pipeline installation work must be advanced. The method adopted by the present invention is to open the bottom plate hole in two stages. After the bottom plate thickness is about two-thirds opened for the first time, the casing, pipeline and valve are installed. After the bottom plate is opened in the pipeline, the water filter stone and filter plate are filled into the hole, and then the valve is closed, and the elbow and hose are installed to connect to the sump. The valve can be opened to drain and depressurize, and water is introduced into the sump. The water is pumped out of the basement using the water pump in the sump. After the drainage and pressure relief is completed, the pipeline is removed, the hole is filled, and the steel plate is welded to the installed steel casing to seal it, which can effectively avoid leakage in the later stage.

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

[0021] 1) The present invention ensures that after the water-relief and pressure-relief holes in the basement structure bottom plate are opened, a drainage and pressure-relief channel is formed to introduce groundwater into the sump and then pump it out of the basement.

[0022] 2) After use, the present invention can easily completely seal the structural bottom plate hole to avoid the risk of leakage.

[0023] 3) The present invention does not require digging a precipitation well, and has a fast construction speed and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a construction diagram of step 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the construction of step 2 of the present invention;

[0026] Figure 3 This is a schematic diagram of the construction of step 3 of the present invention;

[0027] Figure 4 This is a construction diagram of step 4 of the present invention;

[0028] Figure 5 This is a construction diagram of step 5 of the present invention;

[0029] Figure 6 This is a construction diagram of step 6 of the present invention;

[0030] In the figure: 1. Structural base plate; 2. Structural holes; 3. Steel casing; 4. Structural adhesive; 5. Anchor bolts; 6. Valve; 7. Drainage steel pipe; 8. Filter gravel; 9. Filter board; 10. Elbow; 11. Joint; 12. Hose; 13. Epoxy resin; 14. Steel cover; 15. Building surface layer. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings.

[0032] The invention aims at opening holes in the basement structure bottom plate of a built house in water-rich areas to reduce water and relieve pressure, and proposes a construction method for opening holes in the basement bottom plate of an existing building to reduce water and relieve pressure.

[0033] The specific steps include:

[0034] Step 1: Use a drill to drill a hole in the structural floor 1 of the basement. Be careful not to drill through the structural floor 1 and leave a 100mm thickness. This will form a structural hole 2 in the structural floor 1 of the basement.

[0035] Step 2: Install the prefabricated steel casing 3 (including the straight section of the steel casing and the top outer edge of the steel casing) in the structural hole 2. The diameter of the steel casing 3 is 5 mm smaller than the structural hole 2, and the height of the steel casing 3 is 5 mm deeper than the structural hole 2. There are threads inside the steel casing 3. Structural adhesive 4 is injected into the gap between the steel casing 3 and the structural hole 2 for bonding. After the structural adhesive solidifies, the steel casing 3 is anchored to the structural base plate 1 with anchor bolts 5.

[0036] Step 3: Screw the drainage steel pipe 7 equipped with valve 6 into the steel casing 3 through thread. The valve 6 is installed in the middle of the side of the drainage steel pipe 7. A ball valve can be used. The ball valve has a drainage channel in the middle to form a vertical drainage channel with the drainage steel pipe 7.

[0037] Step 4: Use the drilling rig to continue to drill through the structural bottom plate 1. For the second drilling, the diameter of the hole should be smaller than the diameter of the first drilling. Pour the filter stone 8 into the steel casing 3 and put in the filter plate 9 and then close the valve 6 immediately.

[0038] Step 5: Connect the elbow 10 and the hose 12 (the elbow 10 and the hose 12 are connected by the connector 11). After the hose 12 is connected to the water collection well, the valve 6 can be opened to drain and release the pressure.

[0039] Step 6: After the drainage and pressure relief are completed, remove the drainage steel pipe and its components (elbow 10, joint 11, hose 12), inject epoxy resin 13 into the steel casing 3 to fill the hole, and weld the steel cover plate 14 to the top outer edge steel plate of the steel casing 3. In this way, the hole is closed and the building surface can be constructed. Note: The steel casing 3 does not need to be removed.

[0040] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A construction method for opening a hole in the basement floor of an existing building to reduce water and pressure, characterized in that: The steps include: Step 1: Use a drilling machine to drill a hole in the basement structure floor for the first time without drilling through the basement structure floor to form a structural hole; Step 2: Install the prefabricated steel casing in the structural hole, inject structural adhesive into the gap between the steel casing and the structural hole for bonding, and anchor the steel casing to the structural bottom plate with anchor bolts; In step 2, the diameter of the steel casing is 4-6 mm smaller than the structural hole, so that a glue injection gap A is formed between the steel casing and the structural hole; the height of the steel casing is 4-6 mm greater than the depth of the structural hole, so that a glue injection gap B is formed between the top outer edge of the steel casing and the structural bottom plate, and the glue injection gap B is connected to the glue injection gap A; Step 3: Install the drainage steel pipe with valve into the steel casing and keep the valve in the open state; Step 4: Continue to drill a second hole in the basement's structural floor plate with the drilling rig until the basement's structural floor plate is penetrated; pour filter stones into the drainage steel pipe and put in the filter plate and immediately close the valve; In step 4, the aperture of the second hole is smaller than the aperture of the first hole; Step 5: Connect an elbow and a hose to the drainage steel pipe, connect the hose to the water collection well, and open the valve to drain and release the pressure; Step 6: After the drainage and pressure relief are completed, remove the drainage steel pipe, elbow and hose, inject epoxy resin into the steel casing to fill the hole, and weld the steel cover plate to the top outer edge of the steel casing to close the hole. Then the building surface layer can be constructed.

2. The construction method for opening a hole in the basement floor of an existing building to reduce water and pressure according to claim 1 is characterized in that: In step 1, a 100-110mm thickness must be reserved for the structural base plate without being penetrated.

3. The construction method for opening a hole in the basement floor of an existing building to reduce water and pressure according to claim 1 is characterized in that: In step 3, the steel casing and the drainage steel pipe are installed through threaded fittings.

4. The construction method for opening a hole in the basement floor of an existing building to reduce water and pressure according to claim 1 is characterized in that: In step 3, the valve is arranged at the side of the drainage steel pipe, and when the valve core of the valve is in the open state, a vertical flow channel is formed inside the drainage steel pipe.

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