Grouting and leaking stoppage structure for underground engineering

Abstract

The utility model discloses an underground engineering grouting leaking stoppage structure which comprises a plurality of grouting holes which are arranged downwards, the grouting holes penetrate through a basement bottom plate and a cushion layer downwards in sequence till a soil body, grouting pipes are installed in the grouting holes, composite grout is injected into the grouting pipes, and the composite grout permeates into the space between the soil body and the cushion layer to form a stone body. And a high-strength concrete hole sealing body is poured at the top of the grouting hole. The grouting holes are formed, the composite grout is poured into the grouting holes, the composite grout permeates into the space between the soil body and the cushion layer to form the stone body, and the high-strength concrete hole sealing bodies are arranged at the tops of the grouting holes, so that the problem that water seepage or water gushing occurs due to the fact that the water level of underground engineering is increased and a concrete structure is damaged by water pressure can be well solved. The composite slurry is uniformly injected into a damaged structure and a soil body, so that the composite slurry and the soil body form a consolidated body-stone body with high bearing capacity and good waterproofness, and the phenomenon of water seepage or water gushing caused by the fact that the concrete structure is not damaged by underground water is avoided.

Description

Technical Field

[0001] The utility model relates to a grouting and leak-proofing structure for underground engineering, and relates to the technical field of waterproofing and leak-proofing of basements. Background Art

[0002] Water leakage often occurs in underground projects of buildings, which not only affects the normal use of underground projects, but also affects the service life of the entire building in the long run. Existing underground projects usually use injection grouting to plug leaks, but this method is not suitable for underground projects with high water levels and high water pressures. In addition, this method is expensive, difficult to construct, and the later plugging effect is not ideal. Utility Model Content

[0003] The purpose of the utility model is to provide a structure for grouting and plugging leaks in underground projects. The structure improves the impermeability and bearing capacity of the foundation and the bottom plate, uses a composite slurry to consolidate and reinforce the soil under the cushion layer to form a "stone body", ensures that the underground project will not seep water under high water levels and high water pressures, and ensures the normal use of the underground project.

[0004] The technical solution of the utility model is a structure for grouting and plugging leaks in underground projects, comprising a plurality of grouting holes arranged downward, the grouting holes sequentially passing through the basement floor and cushion layer downward to the soil body, grouting pipes are installed in the grouting holes, composite slurry is injected into the grouting pipes, the composite slurry penetrates between the soil body and the cushion layer to form a stone body, and a high-strength concrete sealing body is poured on the top of the grouting holes.

[0005] In the aforementioned underground engineering grouting and plugging structure, the grouting holes are spaced 2 to 4 meters apart in a plum blossom distribution; and the distance from the grouting holes to the surrounding walls or columns is ≥1m.

[0006] In the aforementioned underground engineering grouting and plugging structure, the distance from the grouting hole to the surrounding wall or column is ≥1m.

[0007] In the aforementioned underground engineering grouting and plugging structure, the diameter of the grouting hole is 25mm to 50mm, and the diameter within 200mm of the upper end is ≥35mm.

[0008] In the aforementioned underground engineering grouting plugging structure, the high-strength concrete sealing body is a cylindrical structure with a diameter of 200 mm and a depth of 50 mm to 100 mm with the grouting hole as the center.

[0009] Beneficial effects of the utility model: Compared with the prior art, the utility model is provided with grouting holes that pass through the basement floor and cushion layer, composite slurry is poured into the grouting holes, the composite slurry penetrates into the soil and cushion layer to form a stone body, and a high-strength concrete sealing body is provided on the top of the grouting hole, which can well solve the problem of water seepage or water gushing caused by water pressure damaging the concrete structure when the water level rises in underground projects. The composite slurry is evenly injected into the damaged structure and soil, thereby forming a consolidation body-stone body with strong bearing capacity and good waterproofness with the soil, ensuring that groundwater no longer damages the concrete structure to cause water seepage or water gushing. The utility model is convenient to construct, has a short construction period, and does not require high construction technology. It can meet the use requirements of many projects and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure numerals: 1-soil, 2-cushion, 3-basement floor, 4-grouting hole, 5-high-strength concrete sealing body, 6-stone body. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0013] Embodiment of the utility model: a structure for plugging leakage in underground engineering grouting, such as Figure 1 As shown, it includes a plurality of grouting holes 4 arranged downward, the grouting holes 4 sequentially pass through the basement floor 3 and the cushion layer 2 downward until the soil body 1, a grouting pipe is installed in the grouting hole 4, a composite slurry is injected into the grouting pipe, the composite slurry penetrates into the space between the soil body 1 and the cushion layer 2 to form a stone body 6, and a high-strength concrete sealing body 5 is poured on the top of the grouting hole 4.

[0014] The grouting holes 4 are spaced 2 to 4 meters apart in a plum blossom arrangement, ensuring that the injected composite slurry can evenly and completely penetrate into the damaged structure and soil 1 in the leakage and seepage area.

[0015] The distance between the grouting hole 4 and the surrounding wall or column is ≥1m to avoid damage to the wall or column foundation during the drilling process.

[0016] The grouting hole 4 has a diameter of 25 mm to 50 mm, and a diameter of ≥35 mm within 200 mm of the upper end, so as to ensure that a large amount of composite slurry can be poured in a short time, so that the composite slurry can penetrate into the damaged structure and soil 1 in the leakage and seepage area under pressure. If the diameter is too small, the pouring will be slow; if the diameter is too large, drilling will be time-consuming and labor-intensive.

[0017] The high-strength concrete sealing body 5 is a cylindrical structure with a diameter of 200 mm and a depth of 50 mm to 100 mm with the grouting hole 4 as the center, so as to ensure that the high-strength concrete sealing body 5 can well seal the grouting hole 4 .

[0018] The structure of the utility model is constructed according to the following steps:

[0019] 1) Arrange the positions of the grouting holes 4: Arrange the positions of the grouting holes 4 according to the water seepage of the underground project. The grouting holes 4 are arranged in a plum blossom pattern with a spacing of 2 to 4 meters. A 1-meter space should be left for the holes near the surrounding walls or columns.

[0020] 2) Drilling: Use a water drill or impact drill to drill a grouting hole 4 with a diameter of 25mm to 50mm. The upper 200mm of the grouting hole 4 should not be less than 35mm. Then use a small diameter drill bit to drill through the basement floor 3 and the cushion layer 2 until the soil 1 below the cushion layer 2 is reached.

[0021] 3) Hole cleaning: Use air compressor to clean the sand in the grouting holes 4 to facilitate the fixing and burying of grouting pipes;

[0022] 4) Bury the grouting pipe: bury the galvanized iron pipe (with threaded upper end) matching the grouting hole 4, and install a cast iron valve at the upper end to form the grouting pipe;

[0023] 5) Prepare slurry: The grouting slurry is prepared by using ordinary Portland cement + water glass + acrylate grouting material. The slurry should be injected in batches from dilute to concentrated. According to the test, two ratios are obtained, the first ratio is 0.7, and the second ratio is 1.0. (4) Compared with traditional injection grouting, ordinary Portland cement + water glass and other processes, the composite slurry of the present invention adds an impermeable acrylate grouting material waterproof layer, which penetrates into small gaps and fills them fully, and has better impermeability under the strength of cement.

[0024] 6) Grouting: Start the water pressure test. After the water injection is smooth, start grouting. Stir the slurry with a mixing bucket. Use a small intelligent grouting pump for pressure grouting. Closely monitor the grouting pressure. The pressure must not be greater than 1.0Mpa. Grouting should be continuous and uninterrupted after it starts. During the grouting process, if the pressure reaches the set value and continues to rise, stop grouting and continue grouting in another grouting hole 4;

[0025] 7) Grouting completion inspection: Check the grouting location every other day, remove the valve on the top of the grouting pipe, observe the fullness of the grout in the grouting pipe, and see if there is water seepage. If there is no water seepage, the grouting is considered to have achieved the desired effect and the grouting pipe can be removed. If there is water seepage, take appropriate measures to re-inject or use high-pressure injection of modified epoxy for plugging;

[0026] 8) Remove the grouting pipe: Use a small electric pick to chisel away the concrete of the basement floor 3 around the grouting pipe. The chiseling range is 200mm in diameter and 50mm to 100mm in depth with the grouting pipe as the center. Then use an angle grinder to cut off the grouting pipe along the bottom;

[0027] 9) Sealing the hole: After removing the grouting pipe, use high-strength fine stone concrete to repair and level the grouting pipe pit to form a high-strength concrete sealing body 5.

[0028] The composite slurry is constructed in two steps. The first step is to block water leakage, and the second step is to prevent seepage and strengthen the structure.

[0029] Before formal construction, the composite slurry is mixed, the pressure is controlled by a valve, and the grouting is performed in batches through a grouting pump.

[0030] The materials used in the utility model are all environmentally friendly materials, which will not pollute groundwater when used for plugging basement leaks, and conform to the concept of green environmental protection.

Claims

1. A structure for grouting and plugging leaks in underground engineering, characterized in that: The invention comprises a plurality of grouting holes (4) arranged downwards, the grouting holes (4) sequentially passing through the basement floor (3) and the cushion layer (2) downwards to the soil body (1), a grouting pipe is installed in the grouting hole (4), a composite slurry is injected into the grouting pipe, the composite slurry penetrates between the soil body (1) and the cushion layer (2) to form a stone body (6), and a high-strength concrete sealing body (5) is poured on the top of the grouting hole (4).

2. The structure for grouting and plugging leaks in underground engineering according to claim 1, characterized in that: The grouting holes (4) are spaced 2 to 4 meters apart in a plum blossom arrangement; and the distance between the grouting holes (4) and the surrounding walls or columns is ≥1 meter.

3. The structure for grouting and plugging leaks in underground engineering according to claim 1, characterized in that: The distance between the grouting hole (4) and the surrounding wall or column is ≥1m.

4. The structure for grouting and plugging leaks in underground engineering according to claim 1, characterized in that: The grouting hole (4) has a diameter of 25 mm to 50 mm, and a diameter within 200 mm of the upper end of the hole is ≥35 mm.

5. The structure for grouting and plugging leaks in underground engineering according to claim 1, characterized in that: The high-strength concrete sealing body (5) is a cylindrical structure with a diameter of 200 mm and a depth of 50 mm to 100 mm, taking the grouting hole (4) as the center.

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