A water-cutting trench structure and construction method suitable for waterproofing the external wall of potash salt vertical wells.

Abstract

A water interception trench structure and construction method suitable for waterproofing the exterior of potash mine shafts are disclosed. The structure includes a shaft and a shaft wall, and further includes an embedded water storage bag, a water supply pipe, a water storage box, a water outlet pipe, a wall base, and an observation cylinder. The embedded water storage bag is located on the side of the shaft wall and below the soil water level to collect water flowing downwards from the soil layer through the outer wall of the shaft. The water storage box is located inside the wall base. The bottom of the embedded water storage bag has a water outlet hole. One end of the water supply pipe is connected to the water outlet hole and the other end is connected to the water storage box. One end of the water outlet pipe is connected to the water storage box and the other end is connected to the observation cylinder. The observation cylinder is installed on the side of the shaft wall near the shaft. The embedded water storage bag and the shaft wall are integrally cast with concrete, the water storage box and the wall base are integrally cast with concrete, and the wall base and the shaft are integrally cast with concrete. This invention has the advantages of simple construction, accurate monitoring, reusability, and cost savings, and has wide applicability and promotional value in the field of waterproofing potash mine shafts.

Description

Technical Field

[0001] This invention relates to the field of vertical shaft waterproofing, and in particular to a water interception trench structure and construction method suitable for waterproofing the exterior of potassium salt vertical shafts. Background Technology

[0002] A cutoff trench is a type of seepage prevention facility for dam foundations. It refers to a trench dug and filled with soil in the foundation of an earth-rock dam to cut off the permeable layer of sand and gravel, thereby controlling seepage and preventing foundation deformation due to seepage. It is also known as a cutoff tooth wall. Currently, research on the mechanism of action, applicability, and implementation effects of cutoff trench technology is not systematic, especially under complex aquifer conditions, where the design parameters, construction technology, and practical application effects of cutoff trenches lack in-depth analysis.

[0003] While traditional drainage systems can temporarily reduce water pressure in wells, they are costly and difficult to maintain stable operation during seasons with frequent rainfall. In addition, intercepting trenches are difficult to construct in mining areas with complex aquifers and high strata permeability, and require high structural strength and watertightness. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology, such as high cost and difficulty in maintaining stable operation during seasons with frequent rainfall, and the difficulty in constructing intercepting trenches in mining areas with complex aquifers and high strata permeability. The present invention provides an intercepting trench structure and construction method suitable for waterproofing the external wall of potash vertical shafts.

[0005] The technical solution adopted by this invention to solve its technical problem is a water interception trench structure and construction method suitable for waterproofing the exterior of potash salt vertical wells. The structure includes a well shaft and a well wall, and further includes an embedded water storage bag, a water delivery pipe, a water storage box, a water outlet pipe, a wall base, and an observation cylinder. The embedded water storage bag is located on the side of the well wall and below the soil water level to collect water flowing downwards through the outer wall of the well shaft. The water storage box is located inside the wall base. The bottom of the embedded water storage bag has a water outlet hole. One end of the water delivery pipe is connected to the water outlet hole, and the other end is connected to the water storage box. One end of the water outlet pipe is connected to the water storage box, and the other end is connected to the observation cylinder. The observation cylinder is installed on the side of the well wall near the well shaft. The embedded water storage bag and the well wall are integrally cast with concrete. The water storage box and the wall base are integrally cast with concrete. The wall base and the well shaft are integrally cast with concrete.

[0006] Furthermore, the shape of the embedded water storage bag is determined by a steel template and fixed to the rock wall by chemical bolts.

[0007] Furthermore, the steel template is attached to the rock wall, and protrusions are provided on both sides of the steel template, with sliding rail pull-out filter screens installed inside the protrusions.

[0008] Furthermore, the slide rail pull-out filter screen has a double-layer composite structure, with a stainless steel woven mesh on the surface and a nylon anti-siltation layer on the bottom. T-shaped stainless steel slide rails are provided on both sides, and the root of the slide rails is coated with sealant.

[0009] Furthermore, the water storage bag is composed of multiple circumferential templates, and the circumferential templates have a water delivery interface connected to the water delivery pipe and a water outlet interface connected to the water outlet pipe.

[0010] Furthermore, one end of the circumferential template is provided with a template bolt, and the template bolt of each circumferential template is connected to another circumferential template.

[0011] Furthermore, the measuring cylinder is transparent and has a water level scale, and the top of the measuring cylinder is provided with a water outlet interface to connect to the water outlet pipe. The bottom of the measuring cylinder is provided with a drain nozzle, and a baffle plate is fixed on the well cylinder by high-strength bolts. The water flow of the measuring cylinder flows from the drain nozzle to the baffle plate.

[0012] The technical solution adopted by the present invention to further solve its technical problem is a construction method for a water interception trench structure suitable for waterproofing the external wall of a potash salt vertical well, characterized by comprising the following steps:

[0013] Step 1: Excavate the shaft and wall support area. Before installing prefabricated components and pouring the overall concrete, inspect the following components: sliding rail pull-out filter screen, steel formwork, circumferential formwork, water supply pipe, water outlet pipe, and observation cylinder to ensure that all components are intact and meet the design requirements.

[0014] Step 2: According to the design drawings, determine the installation position of the embedded water storage bag on the outside of the well wall. Insert the sliding rail pull-out filter screen through the slide rails on both sides of the protrusion. After inserting the filter screen into the protrusion, use locking rings to lock the protrusion. Then use chemical bolts to fix the steel template and the sliding rail pull-out filter screen to the rock wall, ensuring that the embedded water storage bag is correctly positioned and flush with the well wall, and that the sliding rail pull-out filter screen can extend and retract normally. The embedded water storage bag should be placed below the soil water level and ensure that it can effectively collect water flowing out of the well wall.

[0015] Step 3: According to the design drawings, after determining the installation position of the water storage box on the wall base, install the circumferential template. The circumferential template should be produced with the waterproof coating. Install the water supply pipe between the embedded water storage bag and the water storage box, and install the water outlet pipe below the water storage box.

[0016] Step 4: Install the transparent measuring tube in the predetermined position, ensure that the water outlet port at the top is connected to the water outlet pipe, and fix the water level scale to ensure that the measuring tube can clearly display the water level and that the water can flow in and out smoothly.

[0017] Step 5: Cast the well shaft and wall base area as a whole, ensuring that the positions of each precast component and the overall structure do not shift excessively. After casting is completed, pull out the slide rail pull-out filter screen.

[0018] Step Six: After the concrete has hardened, install the baffle plate at a suitable position from the drain nozzle using high-strength bolts; conduct a preliminary inspection to ensure that the connections of the embedded water storage bag, water supply pipe, water storage box, measuring cylinder, and baffle plate are secure and leak-free; check the water flow direction and water level changes to ensure that each part is functioning properly; operators can observe the water flow in real time according to the water level scale on the measuring cylinder, and guide the water flow out through the baffle plate when necessary. If the water flow speed is observed to slow down, the sliding rail pull-out filter screen can be pulled out and the clogged mesh can be cleaned before putting it back into use, ensuring good waterproofing effect on the outside of the well wall.

[0019] In summary, the present invention has the following beneficial technical effects:

[0020] This invention offers advantages such as effective water flow collection and control, real-time monitoring of water level changes, and enhanced well wall waterproofing. It overcomes the difficulties in water flow management and insufficient monitoring accuracy inherent in traditional well wall waterproofing structures, significantly improving the reliability and stability of the waterproofing system and effectively preventing water erosion and safety accidents. By monitoring water level changes in real time, operators can adjust water discharge strategies promptly, ensuring the well wall is protected from excessive water pressure and avoiding damage or excessive water accumulation. Furthermore, the sliding-rail pull-out filter design allows for rapid 30-second installation and removal of the filter, effectively preventing blockage of the embedded water storage bag and pipes, ensuring smooth water flow. The protruding opening employs a triple dynamic sealing design: an embedded fluororubber ring for the primary seal, sealant applied to the root of the filter slide rail for the secondary seal, and a pressure seal with a locking ring on the outside of the protruding opening, ensuring the structure is leak-proof. This improves the overall operational efficiency of the waterproofing system. The structure of this invention offers advantages such as simple construction, accurate monitoring, reusability, and cost savings, making it widely applicable and valuable for promotion in the field of waterproofing potash mine shafts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a water interception trough structure suitable for waterproofing the external wall of a potassium salt vertical well according to the present invention;

[0022] Figure 2 This is a side view of an embodiment of the water interception trough structure for waterproofing the exterior of potassium salt vertical wells according to the present invention, showing an embedded water storage bag.

[0023] Figure 3 yes Figure 2 Sectional view 1-1;

[0024] Figure 4 yes Figure 2 Sectional view 2-2;

[0025] Figure 5This is a schematic diagram of a water storage box structure according to an embodiment of a water interception trough structure suitable for waterproofing the external wall of a potassium salt vertical well according to the present invention;

[0026] Figure 6 This is a construction sequence diagram of an embodiment of a construction method for a water interception trench structure suitable for waterproofing the external wall of a potassium salt vertical well according to the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Well wall; 2. Sliding rail pull-out filter screen; 3. Rock wall; 4. Embedded water storage bag; 5. Water supply pipe; 6. Water storage box; 7. Water outlet pipe; 8. Observation cylinder; 9. Wall base; 10. Water baffle; 11. Chemical bolt; 12. High-strength bolt; 13. Inside the well shaft; 14. Water outlet hole; 15. Water supply interface; 16. Circumferential template; 17. Waterproof coating; 18. Water outlet interface; 19. Template bolt; 20. Protrusion; 21. Water inlet hole; 22. Drain nozzle. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Reference Figure 1 This embodiment includes a well shaft, a well wall 1, an embedded water storage bag 4, a water delivery pipe 5, a water storage box 6, a water outlet pipe 7, a wall base 9, an observation cylinder 8, and a water baffle 10. The wall base 9 is integrally cast with the well shaft. The embedded water storage bag 4 is integrally cast with the well wall 1 and installed on the outside of the well wall 1, and must be located below the soil water level. The embedded water storage bag 4 can collect the water flowing down the soil layer through the outer wall of the well shaft. Specifically, the shape of the embedded water storage bag 4 is determined by a steel template and fixed to the rock wall 3 by chemical bolts 11. The steel template is attached to the rock wall 3, and protrusions 20 are provided on both sides of the steel template. A sliding rail pull-out filter 2 is installed in the protrusions 20. The protrusions 20 are actually hollow shells, equivalent to the template for concrete casting. A cavity is left during integral casting, and the sliding rail pull-out filter 2 can be placed in this cavity.

[0031] Reference Figure 2 , Figure 3 and Figure 4 The protruding opening 20 has an embedded rubber ring and a locking ring on the outside. It extends to the inside of the well wall 1 from the end of the slide rail pull-out filter screen 2. The slide rail pull-out filter screen 2 has a double-layer composite structure. The surface layer is a stainless steel woven mesh (0.5mm aperture, tensile strength ≥500MPa), and the bottom layer is a nylon anti-siltation layer (weight ≥200g / ㎡). T-shaped stainless steel slide rails (5mm×10mm cross section) are provided on both sides. The root of the slide rail of the slide rail pull-out filter screen 2 is coated with sealant and partially adheres to the rock wall 3.

[0032] Reference Figure 1 , Figure 3 and Figure 5 The water storage box 6 is located inside the wall base 9 and is integrally cast with the wall base 9 using concrete. The bottom of the embedded water storage bag 4 has a water outlet 14. One end of the water supply pipe 5 is connected to the water outlet 14, and the other end is connected to the water storage box 6. One end of the water outlet pipe 7 is connected to the water storage box 6, and the other end is connected to the observation cylinder 8. The water storage box 6 can store a portion of water, mitigating the potential energy of the water flow, and the water in the water storage box 6 can be transported to the observation cylinder 8 through the water outlet pipe 7. The observation cylinder 8 is installed on the well wall 1 near the well shaft and can be observed from the outside. The observation cylinder 8 is transparent and has a water level scale. The top has an interface for the water outlet pipe 7, which can be connected to the water outlet pipe 7. Simultaneously, a drain nozzle 22 is provided at the bottom of the observation cylinder 8. A baffle plate 10 is fixed to the well shaft by high-strength bolts 12. The water in the observation cylinder 8 flows through the drain nozzle 22 at the bottom to the baffle plate 10.

[0033] Reference Figure 5 Furthermore, the water storage box 6 is composed of multiple circumferential templates 16, and each circumferential template 16 has a water supply interface 15 connected to the water supply pipe 5 and a water outlet interface 18 connected to the water outlet pipe 7. Specifically, the interior of the circumferential template 16 is coated with a waterproof coating 17, template bolts 19 are provided at the ends of the circumferential template 16, and a flange structure is integrally formed on the circumferential template 16. The flanges at the ends of the circumferential template 16 are aligned with the flanges at the ends of the other circumferential template 16 and locked by the template bolts 19, thereby achieving interconnection.

[0034] Reference Figure 6 A construction method for a waterproof intercepting trench structure on the outside of a vertical shaft wall 1 includes the following steps:

[0035] Step 1: Excavate the shaft and wall support area 9. Before installing prefabricated components and pouring the overall concrete, inspect the following components: sliding rail pull-out filter screen 2, steel template, circumferential template 16, water supply pipe 5, water outlet pipe 7, and observation cylinder 8 to ensure that all components are intact and meet the design requirements.

[0036] Step 2: According to the design drawings, determine the installation position of the embedded water storage bag 4 on the outside of the well wall 1. Insert the sliding rail pull-out filter 2 through the slide rail that passes through the protrusions 20 on both sides. After inserting the filter into the protrusions 20, use locking rings to lock the protrusions 20. Then use chemical bolts 11 to fix the steel template and the sliding rail pull-out filter 2 to the rock wall 3, ensuring that the embedded water storage bag 4 is correctly positioned and flush with the well wall 1, and that the sliding rail pull-out filter 2 expands and contracts normally. The embedded water storage bag 4 should be placed below the soil water level and ensure that it can effectively collect the water flowing out of the well wall 1.

[0037] Step 3: According to the design drawings, after determining the installation position of the water storage box 6 on the wall base 9, install the circumferential template 16. The circumferential template 16 should be produced with the waterproof coating 17. Install the water supply pipe 5 between the embedded water storage bag 4 and the water storage box 6, and install the water outlet pipe 7 below the water storage box 6.

[0038] Step 4: Install the transparent measuring cylinder 8 in the predetermined position, ensure that the interface of its top water outlet pipe 7 is connected to the water outlet pipe 7, and fix the water level scale to ensure that the measuring cylinder 8 can clearly display the water level and that the water can flow in and out smoothly.

[0039] Step 5: Cast the well shaft and wall base area 9 as a whole, ensuring that the positions of each precast component and the overall structure do not shift excessively. After casting is completed, pull out the slide rail pull-out filter screen 2.

[0040] Step Six: After the concrete has solidified, use high-strength bolts 12 to install the baffle plate 10 at a suitable position from the drain nozzle 22; conduct a preliminary inspection to ensure that the connections of the embedded water storage bag 4, water supply pipe 5, water storage box 6, measuring cylinder 8, and baffle plate 10 are firm and leak-free; check the water flow direction and water level changes to ensure that each part can work normally; the operator can observe the water flow in real time according to the water level scale on the measuring cylinder 8, and guide the water flow out through the baffle plate 10 when necessary. If the water flow speed is slowed down, the sliding rail pull-out filter screen 2 can be pulled out and the clogged mesh can be cleaned, and it can be put back into use to ensure good waterproofing effect on the outside of the well wall 1.

[0041] When water flows through the outside of the well wall 1, it enters the embedded water storage bag 4 and is transported to the water storage box 6 through the water supply pipe 5. The water in the water storage box 6 flows to the observation cylinder 8 through the water outlet pipe 7. Operators can monitor the changes in water flow in real time through the water level scale on the observation cylinder 8. After the water flows into the observation cylinder 8, the water level change will be directly reflected on the scale, which is convenient for external personnel to observe in real time. The water finally flows through the drain nozzle 22 to the baffle plate 10, and is guided out by the baffle plate 10 to ensure that the water flow does not put pressure on the well wall 1. The sliding pull-out filter screen 2 should be checked and cleaned regularly to ensure that it can effectively filter impurities in the water flow and avoid clogging the embedded water storage bag 4 or the water supply pipe 5. At the same time, the water storage box 6 and the observation cylinder 8 should be checked regularly to ensure the accuracy and stability of water flow monitoring.

[0042] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. Therefore, all equivalent changes made to the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A water interception trench structure suitable for waterproofing the exterior of potash salt vertical well walls, comprising a well shaft and a well wall (1), characterized in that, The well includes an embedded water storage bag (4), a water delivery pipe (5), a water storage box (6), a water outlet pipe (7), a wall base (9), and an observation cylinder (8). The embedded water storage bag (4) is located on the side of the well wall (1) and below the soil water level to collect water flowing down the soil layer through the outer wall of the well. The water storage box (6) is located inside the wall base (9). The bottom of the embedded water storage bag (4) has a water outlet hole (14), and one end of the water delivery pipe (5) is connected to the water outlet hole. (14) One end is connected to the water storage box (6), and the other end of the water outlet pipe (7) is connected to the water storage box (6) and the other end is connected to the observation cylinder (8); the observation cylinder (8) is installed on the well wall (1) on the side close to the well cylinder, the embedded water storage bag (4) and the well wall (1) are integrally poured with concrete, the water storage box (6) and the wall seat (9) are integrally poured with concrete, and the wall seat (9) and the well cylinder are integrally poured.

2. The water interception trough structure for waterproofing the external wall of a potassium salt vertical well according to claim 1, characterized in that, The shape of the embedded water storage bag (4) is determined by a steel template and is fixed to the rock wall (3) by chemical bolts (11).

3. A water-cutting trench structure suitable for waterproofing the exterior of potassium salt vertical well walls according to claim 2, characterized in that, The steel template is attached to the rock wall (3), and protrusions (20) are provided on both sides of the steel template. A sliding rail pull-out filter screen (2) is installed in the protrusions (20).

4. A water-cutting trench structure suitable for waterproofing the exterior of potassium salt vertical well walls according to claim 3, characterized in that, The slide rail pull-out filter (2) has a double-layer composite structure. The outer layer is a stainless steel woven mesh, the bottom layer is a nylon anti-siltation layer, and T-shaped stainless steel slide rails are provided on both sides. The root of the slide rail is coated with sealant.

5. A water-cutting trench structure suitable for waterproofing the exterior of potassium salt vertical well walls according to claim 4, characterized in that, The water storage box (6) is composed of multiple circumferential templates (16), and the circumferential templates (16) have a water supply interface (15) connected to the water supply pipe (5) and a water outlet interface (18) connected to the water outlet pipe (7).

6. A water-cutting trench structure suitable for waterproofing the exterior of potassium salt vertical well walls according to claim 5, characterized in that, One end of the circumferential template (16) is provided with a template bolt (19), and the template bolt (19) of each circumferential template (16) is connected to another circumferential template (16).

7. A water-cutting trench structure suitable for waterproofing the exterior of potassium salt vertical well walls according to claim 6, characterized in that, The measuring cylinder (8) is transparent and has a water level scale. The top of the measuring cylinder (8) is provided with a water outlet pipe (7) interface to connect to the water outlet pipe (7). The bottom of the measuring cylinder (8) is provided with a drain nozzle (22). A baffle plate (10) is fixed on the well shaft by high-strength bolts (12). The water flow of the measuring cylinder (8) flows from the drain nozzle (22) to the baffle plate (10).

8. A construction method for a water-cutting trench structure suitable for waterproofing the external wall of a potash salt vertical well, as described in claim 7, characterized in that, Includes the following steps: Step 1: Excavate the shaft and wall support (9) area. Before installing prefabricated components and pouring the overall concrete, check the slide rail pull-out filter (2), steel template, circumferential template (16), water supply pipe (5), water outlet pipe (7) and observation cylinder (8) to ensure that each component is intact and meets the design requirements. Step 2: According to the design drawings, determine the installation position of the embedded water storage bag (4) on the outside of the well wall (1). Pass the sliding rail pull-out filter screen (2) through the protrusions (20) on both sides. After the filter screen is inserted into the protrusions (20), use the locking ring to lock the protrusions (20). Then use chemical bolts (11) to fix the steel template and the sliding rail pull-out filter screen (2) to the rock wall (3). Ensure that the embedded water storage bag (4) is in the correct position and is flatly connected to the well wall (1). The sliding rail pull-out filter screen (2) should expand and contract normally. The embedded water storage bag (4) should be set below the soil water level and ensure that it can effectively collect the water flowing out of the well wall (1). Step 3: According to the design drawings, after determining the installation position of the water storage box (6) on the wall base (9), install the circumferential template (16). The circumferential template (16) should be produced with the waterproof coating (17). Install the water supply pipe (5) between the embedded water storage bag (4) and the water storage box (6). Install the water outlet pipe (7) below the water storage box (6). Step 4: Install the transparent measuring tube (8) in the predetermined position, ensure that the interface of its top water outlet pipe (7) is connected to the water outlet pipe (7), and fix the water level scale to ensure that the measuring tube (8) can clearly display the water level and that the water flow can smoothly enter and exit. Step 5: Cast the well shaft and wall base (9) area as a whole, and keep the position of each precast component and the overall structure from excessive displacement. After casting, pull out the slide rail pull-out filter (2). Step 6: After the concrete has solidified, use high-strength bolts (12) to install the baffle plate (10) at a suitable position from the drain nozzle (22); conduct a preliminary inspection to ensure that the connection of the embedded water storage bag (4), water supply pipe (5), water storage box (6), measuring cylinder (8) and baffle plate (10) is firm and there is no leakage; check the flow direction and water level changes to ensure that each part can work normally; the operator can observe the water flow in real time according to the water level scale on the measuring cylinder (8), and guide the water flow out through the baffle plate (10) when necessary. If the water flow speed is slowed down, the sliding rail pull-out filter screen (2) is pulled out and the clogged mesh is cleaned, and it can be put back into use to ensure that the external waterproofing effect of the well wall (1) is good.

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