A water-stopping device and system for curtain grouting construction
By adding expansion sealing components and pressurization channels to the grouting pipe, the problem of easy damage to the water-stop bag was solved, achieving secondary water stop in the grouting hole and ensuring the reliability and effectiveness of the grouting construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY NO 2 ENG GROUP CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-26
AI Technical Summary
Existing water-stop bags are prone to rupture under high water pressure or repeated pressurization, leading to water-stopping failure and affecting the effectiveness of curtain grouting construction.
An expansion sealing component, such as an expansion rubber, is added to the grouting pipe as a primary water-stopping measure. A pressurization channel is set in the pipe wall of the grouting pipe so that the pressurization channel of the expansion bladder is connected to the expansion sealing component. When the expansion bladder is damaged, water gushing out or the medium flow triggers the expansion sealing component to expand and fit against the inner wall of the grouting hole, thus achieving secondary water-stopping.
It effectively seals the annular space between the grouting hole and the grouting pipe, ensuring a water-stopping effect, protecting the normal pressurization of the expansion bladder, and improving the reliability of grouting construction.
Smart Images
Figure CN224413662U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel construction technology, and in particular to a water-stopping device and system for curtain grouting construction. Background Technology
[0002] During the curtain grouting construction of a tunnel, holes need to be drilled to a sufficient depth in the grout stop wall to form grouting holes. During grouting, the grouting pipe on the grouting equipment needs to be inserted into the grouting holes formed in the grout stop wall until the output end of the grouting pipe is located at the preset grouting position in the grouting hole before grouting is carried out. If the area where the curtain grouting operation is located is a water-bearing area, water inrush or sudden water flow is likely to occur in the grouting holes, which will greatly affect the grouting process and grouting effect. Therefore, it is necessary to perform water-stopping operations on the grouting holes. The existing water-stopping method is to set a water-stopping bag on the outside of the grouting pipe. By pressurizing the water-stopping bag, the bag expands and seals the annular space between the grouting pipe and the wall of the grouting hole to achieve water stoppage. However, when the water pressure is large, the pressure in the bag is too high, or the bag is easily damaged after repeated pressurization, resulting in water-stopping failure. Therefore, it is necessary to further improve the existing water-stopping methods to solve the above-mentioned technical problems. Utility Model Content
[0003] The purpose of this utility model is to overcome the technical problem that existing water-stop bags are prone to damage and water-stopping failure when the water pressure is high, the pressure inside the bag is too high, or the bag is repeatedly pressurized. The present invention provides a water-stopping device and system for curtain grouting construction.
[0004] In a first aspect, this utility model provides a water-stopping device for curtain grouting construction, comprising a grouting pipe, an expansion bladder sleeved outside the grouting pipe, and an expansion sealing component. The expansion sealing component and the expansion bladder are arranged sequentially along the grouting direction of the grouting pipe. A pressurization channel is provided in the pipe wall of the grouting pipe, and the pressurization channel is connected to the expansion bladder. The expansion sealing component can expand radially along the grouting pipe when it encounters water.
[0005] This invention improves upon existing water-stop bags by adding a first-stage water-stopping measure upstream of the grouting pipe in the grouting direction (i.e., downstream of the water flow direction in the grouting hole). This measure employs an expansion sealing component, such as expandable rubber. Specifically, the expandable rubber can be the rubber material of BW-type or PN-type rubber waterstop strips, or it can be water-based polyurethane prepolymer particles, quick-setting polyurethane, or high-swelling waterproof blanket (GCL), etc. When the expansion bag is damaged, the contents of the expansion bag... Water (if the medium filled in the expansion bladder is water) or gushing water in the grouting hole will flow towards the inlet of the grouting hole and come into contact with the expansion sealing component. This causes the expansion sealing component to expand upon contact with water and eventually adhere to the inner wall of the grouting hole, sealing the annulus between the inner wall of the grouting hole and the grouting pipe, thus achieving a secondary water-stopping effect. Furthermore, setting the pressurization channel of the expansion bladder in the wall of the grouting pipe does not affect the installation of the expansion sealing component on the outer wall of the grouting pipe, and also ensures the normal pressurization and use of the first-level water-stopping measure—the expansion bladder.
[0006] Preferably, two axial limiting rings are provided on the outer wall of the grouting pipe at axial intervals, and the expansion sealing member is disposed between the two axial limiting rings.
[0007] Preferably, the material of the axial limiting ring includes a permeable polymer.
[0008] Preferably, there are several pressurizing channels, which are arranged circumferentially along the wall of the grouting pipe, and the pressurizing channels are parallel to the grouting channels of the grouting pipe.
[0009] Preferably, the grouting pipe includes a first pipe section, a second pipe section, and a third pipe section that are integrally connected, wherein the outer diameter of the first pipe section and the outer diameter of the third pipe section are both smaller than the outer diameter of the second pipe section.
[0010] Preferably, the pressurization channel is located on the second pipe section, and both ends of the pressurization channel are connected to the two end faces of the second pipe section.
[0011] Preferably, the expansion sealing element is sleeved on the second pipe section, and the expansion bladder is sleeved on the third pipe section.
[0012] Preferably, it also includes a pressure bag, which is fitted onto the first pipe section and is connected to the pressure channel.
[0013] Preferably, the material of the expansion sealing element includes expanded rubber.
[0014] In a second aspect, the present invention provides a water-stopping system for curtain grouting construction, including a pressurizing device and a water-stopping device for curtain grouting construction as described above, wherein the pressurizing device is connected to the pressurizing channel.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] This utility model provides a water-stopping device and system for curtain grouting construction. It improves upon existing water-stopping bags by adding a first-stage water-stopping measure upstream of the grouting pipe in the grouting direction (i.e., downstream of the water flow direction in the grouting hole). This measure employs an expansion sealing component, such as expandable rubber. Specifically, the expandable rubber can be the rubber material of BW-type or PN-type rubber waterstop strips, or it can be water-based polyurethane prepolymer particles, quick-setting polyurethane, or high-swelling waterproof blanket (GCL), etc. When the expansion bag... When a rupture occurs, the water in the expansion bladder (if the medium filling the expansion bladder is water) or the gushing water in the grouting hole will flow towards the inlet of the grouting hole and come into contact with the expansion sealing component. This causes the expansion sealing component to expand upon contact with water and eventually adhere to the inner wall of the grouting hole, sealing the annulus between the inner wall of the grouting hole and the grouting pipe, thus achieving a secondary water-stopping effect. Furthermore, placing the pressurization channel of the expansion bladder in the wall of the grouting pipe does not affect the placement of the expansion sealing component on the outer wall of the grouting pipe, and also ensures the normal pressurization and use of the first-level water-stopping measure—the expansion bladder. Attached Figure Description
[0017] Figure 1 This is a longitudinal sectional view of the water-stopping device of this utility model (the expansion bladder and expansion sealing component are not expanded).
[0018] Figure 2 This is a longitudinal sectional view of the water-stopping device of this utility model (both the expansion bladder and the expansion sealing component have been expanded).
[0019] Figure 3 for Figure 2 Cross-sectional view at "AA" in the middle.
[0020] Figure 4 This is a three-dimensional schematic diagram showing the relative positions of the pressure bladder and the grouting pipe at the inlet end of the water-stopping device of this utility model.
[0021] Marked in the image:
[0022] 1. Grouting pipe; 11. First pipe section; 12. Second pipe section; 121. Pressurization channel; 13. Third pipe section; 14. Grouting channel; 2. Expansion bladder; 3. Expansion sealing component; 4. Axial limiting ring; 5. Pressurization bladder; 6. Grouting hole; 7. Pressurization pipe. Detailed Implementation
[0023] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0024] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.
[0025] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.
[0026] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0027] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.
[0028] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0029] Example 1
[0030] This embodiment provides a water-stopping device for curtain grouting construction.
[0031] Figure 1 This is a longitudinal sectional view of the water-stopping device of this utility model (the expansion bladder and the expansion sealing component are not expanded). Figure 2 This is a longitudinal sectional view of the water-stopping device of this utility model (both the expansion bladder and the expansion sealing component have been expanded). Figure 3 for Figure 2 Cross-sectional view at point "AA" in the middle; Figure 4 This is a three-dimensional schematic diagram showing the relative positions of the pressure bladder and the grouting pipe at the inlet end of the water-stopping device of this utility model.
[0032] like Figures 1 to 4 As shown in the figure, the water-stopping device for curtain grouting construction in this embodiment includes a grouting pipe 1, an expansion bladder 2 sleeved outside the grouting pipe 1, and an expansion sealing component 3. The expansion sealing component 3 and the expansion bladder 2 are arranged sequentially along the grouting direction of the grouting pipe 1. A pressurization channel 121 is opened in the pipe wall of the grouting pipe 1, and the pressurization channel 121 is connected to the expansion bladder 2. The expansion sealing component 3 can expand radially along the grouting pipe 1 when it encounters water.
[0033] This invention improves upon existing water-stop bags by adding a first-level water-stopping measure upstream of the water-stop bag in the grouting direction (i.e., downstream of the water flow direction in the grouting hole 6) in the grouting pipe 1. This measure employs an expansion sealing component 3, such as expandable rubber. Specifically, the expandable rubber can be made of BW-type or PN-type rubber water-stop strips, or it can be water-based polyurethane prepolymer particles, fast-setting polyurethane, or a high-swelling waterproof blanket (GCL), etc. When the expansion bag 2 is damaged, the water inside (if it expands...) The medium filled in the bladder 2 (water) or the gushing water in the grouting hole 6 will flow towards the inlet of the grouting hole 6 and come into contact with the expansion sealing element 3, causing the expansion sealing element 3 to expand upon contact with water and eventually adhere to the inner wall of the grouting hole 6, sealing the annulus between the inner wall of the grouting hole 6 and the grouting pipe 1, thus achieving a secondary water-stopping effect. Furthermore, setting the pressurization channel 121 of the expansion bladder 2 in the pipe wall of the grouting pipe 1 does not affect the setting of the expansion sealing element 3 on the outer wall of the grouting pipe 1, and also ensures the normal pressurization and use of the first-level water-stopping measure—the expansion bladder 2.
[0034] In this embodiment, two axial limiting rings 4 are provided axially spaced on the outer wall of the grouting pipe 1, and the expansion sealing member 3 is disposed between the two axial limiting rings 4. Optionally, the material of the axial limiting ring 4 includes a porous base layer formed by a permeable polymer or crushed granite. The material is a rigid material with many pores distributed inside, which has water permeability. The expansion sealing member 3 is a solid material and can be limited by the two axial limiting rings 4 on both sides. At the same time, the axial limiting rings 4 can also utilize their water permeability to allow water gushing from the grouting hole 6 or water from the damaged expansion bladder 2 to permeate through the axial limiting rings 4 and contact the expansion sealing member 3, triggering the expansion sealing member 3 to expand, thereby sealing the annulus between the grouting pipe 1 and the inner wall of the grouting hole 6.
[0035] Optionally, there may be multiple pressurizing channels 121, which are arranged circumferentially along the wall of the grouting pipe 1 and parallel to the grouting channel 14 of the grouting pipe 1. Here, the figure shows 6 pressurizing channels 121, which are evenly distributed in the wall of the grouting pipe 1 and arranged circumferentially outside the grouting channel 14 of the grouting pipe 1. Of course, the number of pressurizing channels 121 is not limited to 6, and other numbers may be selected as needed. This utility model does not make a specific limitation in this regard.
[0036] In this embodiment, the grouting pipe 1 includes an integrally connected first pipe section 11, a second pipe section 12, and a third pipe section 13. The outer diameters of the first pipe section 11 and the third pipe section 13 are both smaller than the outer diameter of the second pipe section 12. By thickening the second pipe section 12, a variable diameter section of the grouting pipe 1 can be formed. Specifically, a pressurization channel 121 is opened on the second pipe section 12, and both ends of the pressurization channel 121 are connected to the two end faces of the second pipe section 12. An expansion sealing member 3 is sleeved on the second pipe section 12, and an expansion bag 2 is sleeved on the third pipe section 13. This allows the outlet end of the pressurization channel 121 to be directly connected to the expansion bag 2 set on the third pipe section 13, facilitating pressurization of the expansion bag 2 through the pressurization channel 121.
[0037] Specifically, the material of the expansion bag 2 can be an elastic rubber material, etc.; the expansion bag 2 is sleeved on the third pipe section 13, and the expansion bag 2 is connected to the pressurization channel 121; the expansion bag 2 can be wrapped around the third pipe section 13, and the connection between the expansion bag 2 and the third pipe section 13 can be sealed by vulcanized rubber to ensure the sealing between the expansion bag 2 and the third pipe section 13.
[0038] In this embodiment, the water-stopping device for curtain grouting construction also includes a pressure bag 5. The material of the pressure bag 5 can be an elastic rubber material, etc. The pressure bag 5 is sleeved on the first pipe section 11 and is connected to the pressure channel 121. The relative positional relationship between the pressure bag 5 and the grouting pipe 1 can be referred to Figure 4 The pressure bag 5 can be wrapped around the first pipe section 11, and the connection between the pressure bag 5 and the first pipe section 11 can be sealed with vulcanized rubber to ensure the airtightness between the pressure bag 5 and the first pipe section 11. The pressure bag 5 also needs to be sealed to the end face of the second pipe section 12. The connection method can also be vulcanized rubber to ensure the airtightness between the pressure bag 5 and the second pipe section 12, so that the pressure bag 5 and the pressure channel 121 can be connected. The pressure pipe 7 is connected to the inlet of the pressure bag 5. The pressure can be applied to the pressure bag 5 through the pressure pipe 7, and then the pressure can enter the expansion bag 2 along the pressure channel 121 to cause the expansion bag 2 to expand.
[0039] Figure 4 The direction of arrow B is the direction of pressurization that inflates the expansion bladder 2, and the direction of arrow C is the direction of grouting through the grouting pipe 1.
[0040] Alternatively, the material of the expansion sealing component 3 may include expansion rubber; specifically, the expansion rubber may be the rubber material of BW type or PN type rubber waterstop strip, or it may be a solid sealing material that can expand rapidly when exposed to water, such as water-based polyurethane prepolymer particles, fast-setting polyurethane or high swelling degree waterproof blanket (GCL). Compared with the expansion rate of expansion rubber, which is relatively slow, the above-mentioned fast-expanding solid sealing material can quickly achieve the sealing of the grouting hole 6.
[0041] Example 2
[0042] This embodiment provides a water-stopping system for curtain grouting construction.
[0043] The water-stopping system for curtain grouting construction in this embodiment includes a pressurizing device (not shown in the figure) and a water-stopping device for curtain grouting construction as in Embodiment 1. The pressurizing device can be connected to the pressurizing channel 121.
[0044] Specifically, the pressurizing device can be connected to the pressurizing pipe 7 to achieve communication with the pressurizing bag 5, the pressurizing channel 121 and the expansion bag 2; the pressurizing medium used by the pressurizing device can include liquid, gas, etc., with water being the preferred liquid and air being the preferred gas. Of course, to ensure better sealing performance, water is preferred as the pressurizing medium.
[0045] In summary, this utility model provides a water-stopping device and system for curtain grouting construction. It improves upon existing water-stopping bags by adding a first-stage water-stopping measure upstream of the grouting pipe in the grouting direction (i.e., downstream of the water flow direction in the grouting hole). This measure employs an expansion sealing component, such as expanding rubber. Specifically, the expanding rubber can be the rubber material of BW-type or PN-type rubber waterstop strips, or it can be water-based polyurethane prepolymer particles, fast-setting polyurethane, or high-swelling waterproof blanket (GCL), etc. When the expansion... When the bladder is damaged, the water in the bladder (if the medium filling the bladder is water) or the gushing water in the grouting hole will flow towards the inlet of the grouting hole and come into contact with the expansion sealing component. This causes the expansion sealing component to expand upon contact with water and eventually adhere to the inner wall of the grouting hole, sealing the annulus between the inner wall of the grouting hole and the grouting pipe, thus achieving a secondary water-stopping effect. Furthermore, placing the pressurization channel of the bladder in the wall of the grouting pipe does not affect the placement of the expansion sealing component on the outer wall of the grouting pipe, and also ensures the normal pressurization and use of the first-level water-stopping measure—the bladder.
[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A water-stopping device for curtain grouting construction, characterized in that, It includes a grouting pipe (1), an expansion bladder (2) fitted outside the grouting pipe (1), and an expansion sealing component (3). The expansion sealing component (3) and the expansion bladder (2) are arranged sequentially along the grouting direction of the grouting pipe (1). A pressurization channel (121) is opened in the pipe wall of the grouting pipe (1), and the pressurization channel (121) is connected to the expansion bladder (2). The expansion sealing component (3) can expand radially along the grouting pipe (1) when it encounters water.
2. The water-stopping device for curtain grouting construction according to claim 1, characterized in that, Two axial limiting rings (4) are provided on the outer wall of the grouting pipe (1) at axial intervals, and the expansion sealing member (3) is disposed between the two axial limiting rings (4).
3. The water-stopping device for curtain grouting construction according to claim 2, characterized in that, The material of the axial limiting ring (4) includes a permeable polymer.
4. The water-stopping device for curtain grouting construction according to claim 1, characterized in that, There are several pressurizing channels (121), and several pressurizing channels (121) are arranged circumferentially along the pipe wall of the grouting pipe (1). The pressurizing channels (121) are parallel to the grouting channels (14) of the grouting pipe (1).
5. The water-stopping device for curtain grouting construction according to claim 1, characterized in that, The grouting pipe (1) includes a first pipe section (11), a second pipe section (12), and a third pipe section (13) that are integrally connected. The outer diameter of the first pipe section (11) and the outer diameter of the third pipe section (13) are both smaller than the outer diameter of the second pipe section (12).
6. The water-stopping device for curtain grouting construction according to claim 5, characterized in that, The pressurization channel (121) is opened on the second pipe section (12), and both ends of the pressurization channel (121) are connected to the two end faces of the second pipe section (12).
7. The water-stopping device for curtain grouting construction according to claim 5, characterized in that, The expansion sealing element (3) is sleeved on the second pipe section (12), and the expansion bladder (2) is sleeved on the third pipe section (13).
8. The water-stopping device for curtain grouting construction according to claim 7, characterized in that, It also includes a pressure bag (5), which is fitted on the first pipe section (11) and is connected to the pressure channel (121).
9. The water-stopping device for curtain grouting construction according to any one of claims 1 to 8, characterized in that, The material of the expansion sealing component (3) includes expanded rubber.
10. A water-stopping system for curtain grouting construction, characterized in that, Includes a pressurizing device and a water-stopping device for curtain grouting construction as described in any one of claims 1 to 9, wherein the pressurizing device is connected to the pressurizing channel (121).