Vertical shaft microorganism induction advanced curtain and water stop plate comprehensive leaking stoppage method
Through the comprehensive method of microbial induction of the front curtain and water stop plate, the problems of insufficient strength and water leakage of the shaft bottom seal are solved, the effect of reducing construction time and cost is achieved, and the anti-floating and shearing performance of the bottom seal is enhanced.
Patent Information
- Application Number
- CN202411622507.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-01-03
AI Technical Summary
In the construction of shafts, especially in water-rich formations and coastal cities, the bottom seal of the shaft is prone to water leakage, resulting in bottom seal damage, and the existing technology is difficult to effectively enhance the strength and anti-floating and shearing performance of the shaft seal.
The integrated leak plugging method of microbial induced curtain and water stop plate is adopted to remove formation water and mud slag from the inside or outside of the shaft, arrange water stop plates, and grout between the grouting steel pipe and the bottom seal, combine vibration and two-dimensional Sub-back cover concrete is formed to enhance the strength of the back cover.
It effectively reduces the drilling construction time and cost, increases the strength of the back cover concrete, resists the buoyancy and shear force of groundwater, solves the problem of water leakage in the bottom seal of the vertical shaft, and is assembled quickly and efficiently.
Smart Images
Figure CN119244246A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of shaft construction, and in particular relates to a comprehensive plugging method of a shaft microorganism-induced advance curtain and a water stop plate. Background Art
[0002] my country's cities are developing rapidly, but in the process of decades of development, due to changes in development concepts at various stages, unreasonable urban planning, economic costs and population growth, urban space utilization and layout are unreasonable, and old and dilapidated buildings are being renovated. Urban development cannot meet people's needs, and urban renewal and transformation have become the future development trend. With the acceleration of urban renewal in my country, the problem of underground space utilization has become increasingly prominent. Major cities have built shaft garages to alleviate the problem of parking difficulties, underground storage pools to regulate flood disasters and water resource recycling, and shafts as underground energy storage and underground energy storage space. The shaft construction method is divided into manual excavation construction, semi-mechanical excavation construction and mechanical excavation construction. For strata with poor ground stability, submersible shaft boring machines are usually used for construction. During the construction process, the submersible shaft boring machine needs to dive underwater as a whole for construction, especially in water-rich strata, especially in coastal cities. After the shaft sinks to the designed depth, there is a large amount of formation water on the inner wall of the shaft. During shaft excavation, there is a lot of thick mud on the inner side of the shaft wall at the bottom of the shaft, and the casting of the deep shaft bottom is prone to concrete segregation, resulting in leakage of the bottom. At the same time, the bottom of the shaft is usually made of large volume of plain concrete, and the bottom shear strength is insufficient, especially in water-rich strata, which is easy to cause the bottom damage. It is urgent to propose a rapid method to strengthen the strength of the shaft bottom and have anti-floating and anti-shear plugging. Summary of the invention
[0003] The purpose of the present invention is to provide a comprehensive plugging method for shaft microbial induced advance curtain and water stop plate according to the deficiencies of the above-mentioned prior art, grouting is performed from the inside or outside of the shaft into the cracks of the bottom seal of the shaft and the soil layer at the bottom of the bottom seal, the formation water and mud residue in the shaft are removed, a pad is arranged on the top surface of the bottom seal, and the water stop plate is hoisted onto the pad, and grouting is performed between the bottom seal and the water stop plate through the grouting steel pipe of the grouting port assembly, while grouting, vibrating is performed using a flat vibrator until the grouting is completed, and secondary bottom seal concrete is poured and vibrated to form a secondary bottom seal. The water stop plate can enhance the strength of the plain concrete shaft bottom seal and resist the buoyancy and shear force of groundwater on the shaft bottom seal; the use of a water stop plate for secondary bottom seal can further solve the problem of water seepage from the shaft bottom seal.
[0004] The purpose of the present invention is achieved by the following technical solutions: A method for comprehensive plugging of shaft microbial induced advance curtain and water stop plate, the method comprising the following steps: S1: injecting grout into the cracks of the bottom cover of the shaft and the soil layer at the bottom of the bottom cover from the inside or outside of the shaft; S2: removing formation water and mud residue in the shaft; S3: arranging a cushion block on the top surface of the bottom cover, and hoisting a water stop plate onto the cushion block; Wherein, the water stop plate comprises a horizontal water stop plate, an annular water stop plate, an annular enclosure plate and a grouting port assembly, the horizontal water stop plate is circular, the annular enclosure plate is arranged along the circumference of the horizontal water stop plate, the annular water stop plate is installed on the top of the annular enclosure plate, the grouting port assembly is arranged on the horizontal water stop plate, the grouting port assembly comprises a grouting steel pipe, a plugging cover and a rubber pad, the bottom of the grouting steel pipe passes through the horizontal water stop plate, the top of the grouting steel pipe is connected to the plugging cover by a thread, and the rubber pad is arranged inside the plugging cover and is used to seal the top of the grouting steel pipe; S4: injecting grout between the bottom cover and the water stop plate through the grouting steel pipe of the grouting port assembly, and vibrating with a flat vibrator while injecting grout until the grouting is completed; S5: Pour the secondary bottom seal concrete and vibrate it to form a secondary bottom seal.
[0005] In step S1, the method of grouting from the inside of the shaft is as follows: Utilize a drill rod with a drill bit to drill grouting holes at intervals along the circumference of the bottom cover, and extend the bottom of the grouting holes to below the bottom of the bottom cover; pull out the drill rod, insert the grouting pipe into the grouting hole, and make the bottom of the grouting pipe located at the bottom of the grouting hole; inject inorganic slurry into the soil layer at the bottom of the bottom cover to complete grouting of the soil layer at the bottom of the bottom cover; replace the inorganic slurry with microbial slurry, draw the grouting pipe to the interface between the bottom cover and the soil layer at the bottom of the bottom cover, inject the microbial slurry into the interface to complete grouting of the interface; while drawing out the grouting pipe, perform grouting operation until the bottom of the grouting pipe leaves the top surface of the bottom cover, and complete grouting of the cracks of the bottom cover and the grouting holes.
[0006] In step S1, the method of grouting from the outside of the shaft is as follows: A drill rod with a directional drill bit is used to drill grouting holes downwardly at intervals along the soil body on the outer side of the vertical shaft. When the directional drill bit approaches the bottom of the bottom cover, the directional drill bit is controlled to drill toward the vertical shaft so that the bottom of the grouting hole extends to the bottom of the bottom cover; the drill rod is pulled out, and a grouting pipe is inserted into the grouting hole, and the bottom of the grouting pipe is located at the bottom of the grouting hole; microbial slurry is injected into the soil layer at the bottom of the bottom cover and the cracks of the bottom cover to complete grouting of the soil layer at the bottom of the bottom cover and the cracks of the bottom cover; the grouting operation is performed while the grouting pipe is pulled out until the bottom of the grouting pipe leaves the top surface of the soil body on the outer side of the vertical shaft.
[0007] The inner surface of the annular water stop plate is flush with the inner surface of the annular enclosure plate, the outer surface of the annular water stop plate is located outside the outer surface of the annular enclosure plate, and the side surface of the horizontal water stop plate is connected to the inner surface of the annular enclosure plate.
[0008] The horizontal water stop plate is provided with a plurality of circles of annular ribs, radial ribs are arranged between the annular ribs, the radial ribs are radial, and the outer ends of the radial ribs are connected to the inner annular surface of the annular enclosure plate.
[0009] The annular ribs are provided with two circles, and the grouting steel pipes are located between the two circles of the annular ribs and are arranged in the annular direction.
[0010] The advantages of the present invention are: (1) In-well drilling can reduce drilling construction time and cost; (2) High-pressure groundwater can be blocked by performing advanced curtain grouting at the bottom of the shaft seal, and then injecting microbial slurry at the interface between the advanced curtain and the seal, or by performing advanced curtain grouting containing microorganisms at the bottom of the seal outside the shaft. The excellent fluidity of the microbial slurry can penetrate the pores or cracks of the seal, induce the concrete to produce calcium carbonate deposition (MICP) to cement the rock and soil materials to block the seepage channel, and further improve the strength of the seal concrete. (3) The water stop plate can enhance the strength of the plain concrete shaft bottom seal and resist the buoyancy and shear force of groundwater on the shaft bottom seal; (4) Using water stop plate for secondary bottom sealing can further solve the problem of water leakage at the bottom of the shaft; (5) Waterstop panels can be assembled quickly and efficiently, and can also be customized and prefabricated. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a flow chart of the steps of the method for comprehensive plugging of leaks by microbial-induced advance curtain and water stop plate in a vertical shaft according to Example 1 of the present invention; Figure 2 This is a schematic diagram of drilling construction in a vertical shaft according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of drilling a hole in a vertical shaft according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the advanced curtain grouting plugging construction of Example 1 of the present invention; Figure 5 This is a schematic diagram of secondary bottom sealing and leak plugging in Example 1 of the present invention; Figure 6 It is a flow chart of the steps of the method for comprehensive plugging of leaks with microorganism-induced advance curtain and water stop plate outside the shaft of Example 2 of the present invention; Figure 7 This is a schematic diagram of the drilling construction outside the vertical shaft of Example 2 of the present invention; Figure 8 This is a schematic diagram of drilling outside the vertical shaft of Example 2 of the present invention; Fig. 9 This is a schematic diagram of the construction of microbial-containing advanced curtain grouting and plugging in Example 2 of the present invention; Fig.10 This is a schematic diagram of secondary bottom sealing and leak plugging in Example 2 of the present invention; Fig.11 It is a structural schematic diagram of the water stop plate of the present invention; Fig.12 for Fig.11 Middle AA section; Fig.13 It is a structural schematic diagram of the grouting port assembly of the present invention; like Figures 1 to 13 As shown, the marks in the figure represent respectively: 1. Water stop plate, 2. Vertical shaft, 3. Formation, 4. Formation water, 5. Drill rod, 6. Drill bit, 7. Directional drill bit, 8. Grouting hole, 9. Grouting pipe, 10. Advance curtain; 11. horizontal water stop plate, 12. annular water stop plate, 13. annular enclosure plate, 14. annular rib plate, 15. radial rib plate, 16. grouting port assembly; 161. Grouting steel pipe, 162. Blocking cover, 163. Thread, 164. Rubber pad; 21. Well wall, 22. Bottom seal, 23. Secondary bottom seal concrete, 24. Crack, 25. Pad. DETAILED DESCRIPTION
[0012] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example 1: Figures 1 to 5 as well as Figures 11 to 13 As shown, this embodiment specifically relates to a method for comprehensive plugging of microbial-induced advance curtains and water stop plates in a vertical shaft, and the method mainly includes the following steps: S1: Grouting is performed from the inside of the shaft 2 into the cracks 24 of the bottom cover 22 of the shaft 2 and into the soil layer at the bottom of the bottom cover 22 .
[0013] The method of grouting from inside the shaft 2 is as follows: Use the drill rod 5 with the drill bit 6 to drill the grouting holes 8 at intervals along the circumference of the bottom cover 22, and extend the bottom of the grouting holes 8 to 0.3m below the bottom of the bottom cover 22. Pull out the drill rod 5, insert the grouting pipe 9 into the grouting hole 8, and make the bottom of the grouting pipe 9 located at the bottom of the grouting hole 8. Inject inorganic slurry (water glass slurry or water glass and cement mixed slurry) into the soil layer at the bottom of the bottom cover 22 to complete the grouting of the soil layer at the bottom of the bottom cover 22, and form an advance curtain 10. Replace the inorganic slurry with microbial slurry (Bacillus pasteurianus slurry), pull the grouting pipe 9 to the interface between the bottom cover 22 and the soil layer at the bottom of the bottom cover 22, and inject the microbial slurry into the interface to complete the grouting of the interface. While pulling out the grouting pipe 9, perform the grouting operation until the bottom of the grouting pipe 9 leaves the top surface of the bottom cover 22, and complete the grouting of the cracks 24 of the bottom cover 22 and the grouting holes 8.
[0014] S2: Remove the formation water 4 and mud residue in the shaft 2.
[0015] S3: Arrange a cushion block 25 on the top surface of the bottom cover 22 , and hoist the water stop plate 1 onto the cushion block 25 .
[0016] Among them, Figures 11 to 13 As shown, the water stop plate 1 is installed at the bottom of the shaft 2 and is located above the bottom cover 22. A pad 25 is provided at the bottom of the water stop plate 1. The pad 25 is placed on the top surface of the bottom cover 22. The water stop plate 1 is wrapped by the secondary bottom cover concrete 23 to form a secondary bottom cover. The shaft 2 is located in the stratum 3, and there are cracks 24 on the bottom cover 22. The water stop plate 1 mainly includes a horizontal water stop plate 11, an annular water stop plate 12, an annular enclosure plate 13, annular ribs 14, radial ribs 15 and a grouting port assembly 16. The horizontal water stop plate 11 is circular, the annular enclosure plate 13 is arranged along the circumference of the horizontal water stop plate 11, the annular water stop plate 12 is installed on the top of the annular enclosure plate 13, and the grouting port assembly 16 is arranged on the horizontal water stop plate 11 for grouting below the horizontal water stop plate 11. The inner ring surface of the annular water stop plate 12 is flush with the inner ring surface of the annular enclosure 13, and the outer ring surface of the annular water stop plate 12 is located outside the outer ring surface of the annular enclosure 13, and the outer ring surface of the annular water stop plate 12 is in contact with the shaft wall 21 of the shaft 2, that is, the outer diameter of the annular water stop plate 12 is equal to the inner diameter of the shaft 2, and the side surface of the horizontal water stop plate 11 is connected to the inner ring surface of the annular enclosure 13. A plurality of circles of annular ribs 14 are installed on the horizontal water stop plate 11, and radial ribs 15 are arranged between the annular ribs 14. The radial ribs 15 are connected to the grouting port assembly 16, and the radial ribs 15 are radial. The outer ends of the radial ribs 15 are connected to the inner ring surface of the annular enclosure 13, and the annular ribs 14 and the radial ribs 15 are used to strengthen the stability of the water stop plate 1. In this embodiment, the annular ribs 14 are provided with two circles, the grouting port assembly 16 (grouting steel pipe 161) is located between the two circles of annular ribs 14 and arranged in the circumferential direction, and a grouting port assembly 16 is also provided at the center of the horizontal water stop plate 11.
[0017] The grouting port assembly 16 includes a grouting steel pipe 161, a plugging cover 162 and a rubber pad 164. The bottom of the grouting steel pipe 161 passes through the horizontal water stop plate 11, the top of the grouting steel pipe 161 is connected to the plugging cover by a thread 163, and the rubber pad 164 is arranged inside the plugging cover 162 and is used to seal the top of the grouting steel pipe 161. Grouting is performed below the horizontal water stop plate 11 through the grouting steel pipe 161. After the grouting is completed, the top of the grouting steel pipe 161 is sealed by the plugging cover 162.
[0018] S4: Grouting is performed between the bottom cover 22 and the water stop plate 1 through the grouting steel pipe 161 of the grouting port assembly 16. While grouting, a flat vibrator is used to vibrate until the grouting is completed.
[0019] S5: pouring the secondary bottom seal concrete 23 and vibrating and compacting it to form the secondary bottom seal.
[0020] The beneficial effects of this embodiment are: (1) In-well drilling can reduce drilling construction time and cost; (2) First, high-pressure groundwater can be blocked by performing advanced curtain grouting at the bottom of the shaft seal. Then, microbial slurry is injected at the interface between the advanced curtain and the seal. The excellent fluidity of the microbial slurry can penetrate the pores or cracks of the seal, induce the concrete to produce calcium carbonate deposition (MICP) to cement the rock and soil materials to block the seepage channel, and further improve the strength of the seal concrete. (3) The water stop plate can enhance the strength of the plain concrete shaft bottom seal and resist the buoyancy and shear force of groundwater on the shaft bottom seal; (4) Using water stop plate for secondary bottom sealing can further solve the problem of water leakage at the bottom of the shaft; (5) Waterstop panels can be assembled quickly and efficiently, and can also be customized and prefabricated.
[0021] Example 2: Figures 6 to 13 As shown, this embodiment specifically relates to a method for comprehensive plugging of leaks by a microbial induced advance curtain and a water stop plate outside a vertical shaft. Except that step S1 is different from step S1 of embodiment 1, steps S2 to S5 are the same as steps S2 to S5 of embodiment 1, so they will not be repeated here.
[0022] Step S1 of this embodiment is: grouting is performed from the outside of the shaft 2 into the cracks 24 of the bottom cover 22 of the shaft 2 and into the soil layer at the bottom of the bottom cover 22 .
[0023] The method of grouting from the outside of the shaft 2 is as follows: The grouting holes 8 are drilled downward along the soil at intervals of 1m outside the circumference of the shaft 2 using the drill rod 5 with the directional drill bit 7. When the directional drill bit 7 is close to the bottom of the bottom cover 22 by 1-2m, the directional drill bit 7 is controlled to drill toward the shaft 2 so that the bottom of the grouting hole 8 extends to the bottom of the bottom cover 22. The drill rod 5 is pulled out, and the grouting pipe 9 is inserted into the grouting hole 8, and the bottom of the grouting pipe 9 is located at the bottom of the grouting hole 8. Microbial slurry (Bacillus pasteurianus slurry) is injected into the soil layer at the bottom of the bottom cover 22 and the cracks 24 of the bottom cover 22 to complete the grouting of the soil layer at the bottom of the bottom cover 22 and the cracks 24 of the bottom cover 22, forming an advance curtain 10. The grouting operation is performed while the grouting pipe 9 is pulled out until the bottom of the grouting pipe 9 leaves the top surface of the soil outside the circumference of the shaft 2.
[0024] The beneficial effects of this embodiment are: (1) First, microbial-containing advanced curtain grouting is carried out at the bottom of the bottom seal outside the shaft. It can not only block the high-pressure groundwater, but also use the excellent fluidity of the microbial slurry to penetrate the pores or cracks of the bottom seal, induce the concrete to produce calcium carbonate deposition (MICP) to cement the rock and soil materials to block the seepage channel, and further improve the strength of the bottom seal concrete; (2) The water stop plate can enhance the strength of the plain concrete shaft bottom seal and resist the buoyancy and shear force of groundwater on the shaft bottom seal; (3) Using water stop plate for secondary bottom sealing can further solve the problem of water leakage at the bottom of the shaft; (4) Waterstop panels can be assembled quickly and efficiently, and can also be customized and prefabricated.
[0025] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.
Claims
1. A vertical shaft microbial induced advance curtain and water stop plate comprehensive plugging method, characterized in that The method comprises the following steps: S1: injecting grout into the cracks of the bottom cover of the shaft and the soil layer at the bottom of the bottom cover from the inside or outside of the shaft; S2: removing formation water and mud residue in the shaft; S3: arranging a cushion block on the top surface of the bottom cover, and hoisting a water stop plate onto the cushion block; Wherein, the water stop plate comprises a horizontal water stop plate, an annular water stop plate, an annular enclosure plate and a grouting port assembly, the horizontal water stop plate is circular, the annular enclosure plate is arranged along the circumference of the horizontal water stop plate, the annular water stop plate is installed on the top of the annular enclosure plate, the grouting port assembly is arranged on the horizontal water stop plate, the grouting port assembly comprises a grouting steel pipe, a plugging cover and a rubber pad, the bottom of the grouting steel pipe passes through the horizontal water stop plate, the top of the grouting steel pipe is connected to the plugging cover by a thread, and the rubber pad is arranged inside the plugging cover and is used to seal the top of the grouting steel pipe; S4: injecting grout between the bottom cover and the water stop plate through the grouting steel pipe of the grouting port assembly, and vibrating with a flat vibrator while injecting grout until the grouting is completed; S5: Pour the secondary bottom seal concrete and vibrate it to compact it to form the secondary bottom seal.
2. A vertical shaft microbial induced advance curtain and water stop plate comprehensive plugging method according to claim 1, characterized in that In step S1, the method of grouting from the inside of the shaft is as follows: Utilize a drill rod with a drill bit to drill grouting holes at intervals along the circumference of the bottom cover, and extend the bottom of the grouting holes to below the bottom of the bottom cover; pull out the drill rod, insert the grouting pipe into the grouting hole, and make the bottom of the grouting pipe located at the bottom of the grouting hole; inject inorganic slurry into the soil layer at the bottom of the bottom cover to complete grouting of the soil layer at the bottom of the bottom cover; replace the inorganic slurry with microbial slurry, draw the grouting pipe to the interface between the bottom cover and the soil layer at the bottom of the bottom cover, inject the microbial slurry into the interface to complete grouting of the interface; while drawing out the grouting pipe, perform grouting operation until the bottom of the grouting pipe leaves the top surface of the bottom cover, and complete grouting of the cracks of the bottom cover and the grouting holes.
3. A vertical shaft microbial induced advance curtain and water stop plate comprehensive plugging method according to claim 1, characterized in that In step S1, the method of grouting from the outside of the shaft is as follows: Using a drill rod with a directional drill bit to drill grouting holes at intervals along the soil outside the circumference of the shaft, when the directional drill bit approaches the bottom of the bottom cover, the directional drill bit is controlled to drill toward the shaft so that the bottom of the grouting hole extends to the bottom of the bottom cover; Pull out the drill rod, insert the grouting pipe into the grouting hole, and make the bottom of the grouting pipe be located at the bottom of the grouting hole; inject microbial slurry into the soil layer at the bottom of the bottom cover and the cracks of the bottom cover to complete the grouting of the soil layer at the bottom of the bottom cover and the cracks of the bottom cover; while pulling out the grouting pipe, perform the grouting operation until the bottom of the grouting pipe leaves the top surface of the soil body on the outside of the shaft.
4. A vertical shaft microbial induced advance curtain and water stop plate comprehensive plugging method according to claim 1, characterized in that The inner surface of the annular water stop plate is flush with the inner surface of the annular enclosure plate, the outer surface of the annular water stop plate is located outside the outer surface of the annular enclosure plate, and the side surface of the horizontal water stop plate is connected to the inner surface of the annular enclosure plate.
5. A vertical shaft microbial induced advance curtain and water stop plate comprehensive plugging method according to claim 4, characterized in that The horizontal water stop plate is provided with a plurality of circles of annular ribs, radial ribs are arranged between the annular ribs, the radial ribs are radial, and the outer ends of the radial ribs are connected to the inner annular surface of the annular enclosure plate.
6. A vertical shaft microbial induced advance curtain and water stop plate comprehensive plugging method according to claim 5, characterized in that The annular ribs are provided with two circles, and the grouting steel pipes are located between the two circles of the annular ribs and are arranged in the annular direction.