Formwork for a tunnel damming wall crossing a debris flow accumulation body
By setting a retractable second template on the outside of the grout-stopping wall template and connecting them using a staggered structure, the template compatibility problem was solved, enabling adaptation to different tunnel cross sections, reducing construction costs and improving efficiency.
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
- 2026-06-19
Smart Images
Figure CN224379850U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel construction technology, and in particular to a template for a grout-stopping wall in a tunnel traversing debris flow deposits. Background Technology
[0002] When tunnels traverse geologically poor and loosely structured strata such as debris flow deposits, the overlying rock and soil are prone to collapse after excavation, leading to landslides. Therefore, curtain grouting technology is required to reinforce the surrounding rock before excavation. A key step in implementing curtain grouting is constructing a grout-stopping wall at the tunnel face. This wall is used to seal the high-pressure grout and prevent its backflow and leakage. Before pouring the grout-stopping wall, formwork needs to be erected in front of the tunnel face to create a pouring space. Traditional grout-stopping wall formwork is a monolithic wooden structure that needs to be prefabricated to fit the cross-sectional dimensions of the excavated tunnel before being transported to the construction site for installation. It can be reused multiple times at different cross-sectional locations to pour multiple grout-stopping walls as the tunnel excavation progresses. However, the dimensions of cross-sections at different locations in the tunnel will vary, but the formwork dimensions are fixed during prefabrication and cannot be adjusted. Therefore, it cannot be adapted when different cross-sectional dimensions differ. For example, if the radial dimension of the second cross-section in the tunnel is larger than that of the first cross-section, but the formwork only fits the first cross-section, the formwork installed at the second cross-section will be smaller than the cross-sectional dimensions there, resulting in a noticeable gap between the formwork and the tunnel surrounding rock. This gap needs to be sealed before pouring the grout-stopping wall, increasing the number of construction steps and reducing construction efficiency. If the formwork size is larger than the corresponding tunnel cross-sectional dimensions, the formwork cannot be installed and must be custom-made, resulting in high construction costs. Utility Model Content
[0003] The purpose of this utility model is to overcome the technical problem that existing fixed-size grout stop wall templates cannot be adapted to various tunnel sizes and require additional leak-stopping measures or template replacement when reused, resulting in high construction costs and low efficiency. This utility model provides a template for a grout stop wall in a tunnel that passes through debris flow deposits.
[0004] This utility model provides a template for a grout-stopping wall of a tunnel traversing debris flow deposits, including a first template and a second template. The second template includes several second sub-templates spliced together, which surround the first template along the circumference of the tunnel. A telescopic mechanism is connected between the second sub-templates and the first template, which can drive the second templates to expand radially along the tunnel and fit tightly against the inner wall surface formed by the tunnel excavation. Adjacent second sub-templates are connected to each other and to the first template through a staggered structure.
[0005] This invention adapts to tunnel cross-sections of different sizes by setting a retractable second template on the outside of a first template of fixed size. Specifically, the expansion and contraction of the second template can be driven by a telescopic mechanism. When the corresponding tunnel cross-section size is larger than the template size, the telescopic mechanism can push the outer second template to expand, allowing the second template to press against the inner wall of the tunnel. The expanded second template can then seal the gap between the template and the inner wall of the tunnel. Furthermore, adjacent second templates and the second template and the first template are connected by a staggered structure. When the second template is pushed out and expanded, the staggered structure ensures that there are no gaps between adjacent second templates and between the second template and the first template, maintaining sufficient sealing to prevent grout leakage during pouring. No additional sealing measures are required. When prefabricating this template, it can be adapted to the smallest possible tunnel cross-section. Thus, when encountering a larger tunnel cross-section, the second template can be expanded by the telescopic mechanism to adapt, enhancing the adaptability of the template. It also eliminates the need for custom-made and replaced templates, reducing construction costs and improving construction efficiency.
[0006] Preferably, the staggered structure includes a first staggered surface and a second staggered surface that fit together.
[0007] Preferably, both the first misaligned surface and the second misaligned surface are coated with lubricating oil.
[0008] Preferably, the first misaligned platform is provided with a slide rail, and the second misaligned platform is provided with a slide groove, wherein the slide rail and the slide groove are adapted to each other.
[0009] Preferably, both the first staggered surface and the second staggered surface are magnetic materials that can attract each other.
[0010] Preferably, it also includes an orifice tube, wherein the first template has a plurality of through positioning holes, the orifice tube corresponds one-to-one with the plurality of positioning holes and passes through the positioning holes, and the orifice tube is detachably connected to the first template.
[0011] Preferably, one end of the orifice pipe is provided with a flange, which is detachably connected to the first template.
[0012] Preferably, the outer diameter of the end of the orifice pipe with the flange is larger than the outer diameter of the other end of the orifice pipe.
[0013] Preferably, it further includes connecting rods, and the first template includes a plurality of first sub-templates spliced together, with the connecting rods connecting between the spliced first sub-templates.
[0014] Preferably, the connecting rod includes a plurality of transverse connecting rods and a plurality of longitudinal connecting rods.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] This utility model provides a template for a grout-stopping wall in a tunnel traversing debris flow deposits. By setting a retractable second template on the outside of a first template of fixed size, it adapts to tunnel cross-sections of different sizes. Specifically, the expansion and contraction of the second template can be driven by a telescopic mechanism. When the corresponding tunnel cross-section size is larger than the template size, the telescopic mechanism can push the outer second template to expand, allowing the second template to press against the inner wall of the tunnel. This expanded second template then seals the gap between the template and the tunnel inner wall. Furthermore, the second template can also seal the gaps between adjacent second templates, as well as between the second and first templates. All sections are connected using a staggered structure. When the second template is pushed out and expanded, the staggered structure ensures that there are no gaps between adjacent second templates, or between the second template and the first template, maintaining sufficient sealing to prevent grout leakage during pouring. No additional sealing measures are needed to stop the leakage. When prefabricating this template, it can be adapted to the smallest possible tunnel cross-section. In this way, when encountering a larger tunnel cross-section, the second template can be expanded through the telescopic mechanism to adapt it, enhancing the adaptability of the template. There is no need to customize and replace the template, reducing construction costs and improving construction efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the template for the grout-stopping wall of the tunnel traversing debris flow deposits according to this utility model.
[0018] Figure 2 for Figure 1 A schematic diagram of the cross-section at "BB" (the second template is not expanded).
[0019] Figure 3 for Figure 1 A cross-sectional diagram at point “BB” (the second template has been expanded).
[0020] Figure 4 This is a partial top view of the template (the second template is not expanded).
[0021] Figure 5 This is a partial top view of the template (the second template has been expanded).
[0022] Figure 6 This is a partial cross-sectional schematic diagram of the first template (with hidden orifice pipe).
[0023] Figure 7 This is a schematic diagram showing the installation of the orifice pipe on the first template (showing the orifice pipe).
[0024] Figure 8This is a schematic diagram of the installation of the tapered orifice pipe on the first template.
[0025] Figure 9 for Figure 1 A magnified view of a portion of point A in the middle.
[0026] Figure 10 for Figure 3 A cross-sectional diagram at the "CC" mark.
[0027] Figure 11 for Figure 5 A schematic diagram of the cross-section at "DD".
[0028] Marked in the image:
[0029] 1. First template, 11. First sub-template, 111. Positioning hole, 2. Orifice pipe, 3. Flange, 4. Horizontal connecting rod, 5. Longitudinal connecting rod, 6. Second template, 61. Second sub-template, 7. Telescopic mechanism, 8. Misaligned structure, 81. First misaligned surface, 82. Second misaligned surface, 83. Slide rail, 84. Slide groove. Detailed Implementation
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] 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.
[0036] Example
[0037] This embodiment provides a template for a grout-stopping wall in a tunnel traversing a debris flow deposit.
[0038] Figure 1 This is a schematic diagram of the template for the grout-stopping wall of the tunnel traversing debris flow deposits according to this utility model. Figure 2 for Figure 1 A cross-sectional view of the section at "BB" (the second template is not expanded); Figure 3 for Figure 1 A cross-sectional view of the section at "BB" (the second template has been expanded); Figure 4This is a partial top view of the template (the second template is not expanded). Figure 5 This is a partial top view of the template (the second template has been expanded). Figure 6 This is a partial cross-sectional schematic diagram of the first template (with hidden orifice pipe); Figure 7 This is a schematic diagram showing the installation of the orifice pipe on the first template (showing the orifice pipe). Figure 8 This is a schematic diagram showing the installation of the tapered orifice pipe on the first template. Figure 9 for Figure 1 A magnified view of a section at point A in the middle; Figure 10 for Figure 3 A cross-sectional diagram at the "CC" position; Figure 11 for Figure 5 A schematic diagram of the cross-section at "DD".
[0039] like Figures 1 to 11 As shown in the figure, the template for the tunnel stop wall passing through the debris flow deposit in this embodiment includes a first template 1 and a second template 6. The second template 6 includes a plurality of second sub-templates 61 spliced together. The plurality of second sub-templates 61 surround the first template 1 in the circumferential direction of the tunnel. A telescopic mechanism 7 is connected between the second sub-templates 61 and the first template 1. The telescopic mechanism 7 can drive the second template 6 to expand radially along the tunnel and fit tightly against the inner wall surface formed by the tunnel excavation. Adjacent second sub-templates 61 and the second sub-templates 61 and the first template 1 are connected by a staggered structure 8.
[0040] This invention adapts to tunnel cross-sections of different sizes by providing a retractable second template 6 on the outside of a first template 1 of fixed size. Specifically, the expansion and contraction of the second template 6 can be driven by a telescopic mechanism 7. When the corresponding tunnel cross-section size is larger than the template size, the telescopic mechanism 7 can push the outer second template 6 to expand, allowing the second template 6 to press against the inner wall of the tunnel. This expanded second template 6 then seals the gap between the template and the tunnel inner wall. Furthermore, adjacent second templates 6, as well as between the second template 6 and the first template 1, employ a staggered structure 8. When the second template 6 is pushed out and expanded, the staggered structure 8 ensures that there are no gaps between adjacent second templates 6, and between the second template 6 and the first template 1, maintaining sufficient sealing to prevent grout leakage during pouring. No additional sealing measures are needed to stop the leakage. When the template is prefabricated, it can be adapted to the smallest possible tunnel cross-section. When encountering a larger tunnel cross-section, the second template 6 can be expanded by the telescopic mechanism 7 to adapt it, enhancing the adaptability of the template. There is no need to re-customize and replace the template, reducing construction costs and improving construction efficiency.
[0041] In this embodiment, the staggered structure 8 may include a first staggered surface 81 and a second staggered surface 82 that fit together. If the staggered structure 8 is set between the second sub-formwork 61 and the first formwork 1, the first staggered surface 81 is opened on the second sub-formwork 61 and the second staggered surface 82 is opened on the first formwork 1. If the staggered structure 8 is set between adjacent second sub-formworks 61, the first staggered surface 81 is opened on one of the second sub-formworks 61 and the second staggered surface 82 is opened on the other adjacent second sub-formwork 61. The first staggered surface 81 and the second staggered surface 82 can slide relative to each other as the telescopic mechanism 7 extends and retracts, and can remain fitted together during the relative sliding process. After sliding into place, the first staggered surface 81 and the second staggered surface 82 can also remain fitted together, which can prevent concrete from leaking between the first staggered surface 81 and the second staggered surface 82 during the pouring of the grout stop wall.
[0042] In this embodiment, both the first misaligned surface 81 and the second misaligned surface 82 are coated with lubricating oil, which can maintain the smooth relative sliding between the first misaligned surface 81 and the second misaligned surface 82 and reduce the frictional force of the relative sliding between the first misaligned surface 81 and the second misaligned surface 82.
[0043] Optionally, a slide rail 83 is provided on the first misaligned surface 81, and a slide groove 84 is provided on the second misaligned surface 82. The slide rail 83 and the slide groove 84 are compatible and are both arranged along the relative sliding direction between the first misaligned surface 81 and the second misaligned surface 82. The compatible slide rail 83 and the slide groove 84 can fix the relative sliding trajectory between the first misaligned surface 81 and the second misaligned surface 82, preventing the first misaligned surface 81 and the second misaligned surface 82 from shifting or moving in other directions. In addition, the slide rail 83 can be embedded in the slide groove 84, so that the first misaligned surface 81 and the second misaligned surface 82 always remain in contact during relative sliding, preventing them from separating and forming gaps, thereby preventing concrete from leaking between the first misaligned surface 81 and the second misaligned surface 82 during the pouring of the grout-stopping wall.
[0044] Alternatively, both the first staggered surface 81 and the second staggered surface 82 can be made of magnetic materials that can attract each other. If the first staggered surface 81 and the second staggered surface 82 are not connected by the aforementioned sliding rail 83 and sliding groove 84, other methods can be used instead. For example, both the materials of the first staggered surface 81 and the second staggered surface 82 can be made of magnetic materials, so that the first staggered surface 81 and the second staggered surface 82 can attract each other and have sufficient attraction force. In addition, the first staggered surface 81 and the second staggered surface 82 also have smooth surfaces that do not affect their relative sliding. The magnetic attraction between the two can also keep them in contact during relative sliding, preventing them from separating and forming gaps. This can prevent concrete from leaking between the first staggered surface 81 and the second staggered surface 82 during the pouring of the grout stop wall.
[0045] Of course, the connection between the first staggered platform 81 and the second staggered platform 82 can also be other alternative methods, not limited to the two mentioned above, as long as they can be tightly fitted without gaps and do not affect their relative sliding. This utility model does not make any specific limitations in this regard.
[0046] In this embodiment, the template for the tunnel grout-stopping wall that passes through the debris flow deposit also includes an orifice pipe 2. The first template 1 has multiple through positioning holes 111. The orifice pipe 2 corresponds to the multiple positioning holes 111 and passes through the positioning holes 111. The orifice pipe 2 is detachably connected to the first template 1.
[0047] The position of the grouting hole can be determined during the prefabrication of the template, and a positioning hole 111 can be opened at a preset position and a preset angle on the first template 1. The orifice pipe 2 is then installed in the positioning hole 111, so that the position and angle of the orifice pipe 2 are consistent with the positioning hole 111, thereby determining the preset position and preset angle of the grouting hole.
[0048] Optionally, one end of the orifice pipe 2 is provided with a flange 3, which is detachably connected to the first template 1;
[0049] A flange 3 is installed at one end of the orifice pipe 2 to enable a detachable connection between the orifice pipe 2 and the first template 1. During installation, the orifice pipe 2 can pass through the positioning hole 111 from one side of the first template 1 and extend to the other side. After the first template 1 is installed on the construction site, the end of the orifice pipe 2 away from the flange 3 can face the working face and be positioned within the pouring space of the grout stop wall. When the grout stop wall is poured, the injection head of the grouting equipment can be inserted from the orifice pipe 2 into the pouring space of the grout stop wall to pour concrete. After pouring, the orifice pipe 2 can be pre-embedded in the grout stop wall, and an opening for the grouting hole is formed at the location of the orifice pipe 2. This saves the construction steps of drilling holes separately after pouring and then installing the orifice pipe 2. The orifice pipe 2 can be installed in one go with the pouring of the grout-stopping wall, saving construction steps and improving construction efficiency. In addition, the first template 1 can be prefabricated in advance, and the positioning hole 111 can be precisely positioned by machine during the production process of the first template 1. The opening angle of the positioning hole 111 can also meet the accuracy. In contrast, the existing method is to drill holes for positioning by manually marking lines on the construction site, which cannot guarantee the positioning and drilling accuracy. In this embodiment, the positioning accuracy can be further improved by prefabricating the template and pre-processing the positioning hole 111, so as to ensure the subsequent curtain grouting effect.
[0050] Alternatively, the outer diameter of the end of the orifice pipe 2 with the flange 3 is larger than the outer diameter of the other end of the orifice pipe 2; for example, the orifice pipe 2 can be configured as a tapered pipe structure.
[0051] If the orifice pipe 2 and the flange 3 are connected by a non-removable fixed connection such as an integral connection, then the connection between the flange 3 and the first template 1 needs to be disconnected after the grout stop wall is poured, then the orifice pipe 2 needs to be disassembled, then the first template 1 needs to be demolded, and then the orifice pipe 2 needs to be installed back into the grouting hole formed by the pouring on the grout stop wall. To facilitate the disassembly of the orifice pipe 2, it can be designed as a tapered pipe, with the outer diameter of the end of the orifice pipe 2 with the flange 3 being larger than the outer diameter of the other end. In other words, the smaller end of the tapered pipe faces the working face, making it easier for the orifice pipe 2 to be removed from the grout stop wall during disassembly, thus reducing the resistance of the grout stop wall concrete to the orifice pipe 2 during disassembly. Of course, the orifice pipe 2 and the flange 3 can also adopt a detachable connection method such as a threaded connection. After the grout stop wall is poured, only the flange 3 can be removed, and then the formwork can be removed from the orifice pipe 2 to complete the demolding. There is no need to remove the orifice pipe 2, so that the orifice pipe 2 can always remain on the grout stop wall, saving the steps of disassembling and reinstalling the orifice pipe 2, and further improving construction efficiency.
[0052] Alternatively, the orifice pipe 2 and the flange 3 can be connected in two ways: one is a non-removable fixed connection, such as an integral connection; the other is a detachable connection, such as a threaded connection.
[0053] In this embodiment, the template for the tunnel grout-stopping wall that passes through the debris flow deposit also includes connecting rods. The first template 1 includes multiple first sub-templates 11 that are spliced together, and the connecting rods are connected between the spliced first sub-templates 11.
[0054] The first template 1 is divided into multiple first sub-templates 11, which are spliced together. Each first sub-template 11 can be demolded separately during demolding. If the orifice pipe 2 and the flange 3 are connected by threads, interference will occur between the first template 1 and the orifice pipe 2 due to the different angles of each orifice pipe 2 relative to the first template 1 if demolding is performed as a whole, making demolding impossible. Demolding the first template 1 in sections, that is, demolding the first sub-templates 11 separately, can solve this problem. Specifically, the first sub-templates 11 without positioning holes 111 can be demolded first, and then the first sub-templates 11 with orifice pipes 2 can be demolded separately along the orifice pipes 2. Demolding can be performed by setting the direction of the first template 1; if all the first sub-templates 11 have positioning holes 111, the first sub-template 11 located in the middle of the first template 1 can be demolded first, because the tilt angle of the positioning holes 111 on the first sub-template 11 located in the middle is small, and the interference between the first sub-template 11 and the orifice tube 2 is not obvious, so demolding is easier; after the first sub-template 11 located in the middle is demolded first, the movement space of the other adjacent first sub-templates 11 can be reserved, and the first sub-templates 11 in other positions can be demolded, and finally the demolding of the entire first template 1 can be achieved.
[0055] Alternatively, the connecting rod includes multiple transverse connecting rods 4 and multiple longitudinal connecting rods 5. Specifically, the transverse connecting rods 4 are used to connect multiple transversely spliced first sub-templates 11, and the longitudinal connecting rods 5 are used to connect adjacent longitudinally spliced first sub-templates 11.
[0056] When assembling the first template 1, multiple horizontal and vertical connecting rods can be used to splice the various first sub-templates 11. Specifically, the horizontal connecting rods 4 and the vertical connecting rods 5 can be welded to the first sub-templates 11 to connect the various first sub-templates 11. The assembly process of the first template 1 can be prefabricated in the factory, and then the assembled first template 1 can be installed in place on the construction site. Of course, the first template 1 can also be assembled on the construction site. When demolding the first template 1 after the grout stop wall is poured, the horizontal connecting rods 4 and the vertical connecting rods 5 can be cut and removed first, and then the first sub-templates 11 can be demolded in sequence.
[0057] In addition to using connecting rods to assemble the first template 1, other methods can also be used, such as welding each first sub-template 11 together. Spot welding can facilitate cutting and separating each first sub-template 11 during demolding, and can avoid increasing the workload of cutting during demolding due to continuous welds. This utility model does not make specific limitations on the connection method between each first sub-template 11.
[0058] Alternatively, the material of the first template 1 may be steel, and the material of the second template 6 may include polymer materials.
[0059] The first template 1 can be made of steel. Compared with traditional wooden templates, steel templates have higher strength, better flatness, and greater stability. In addition, steel templates are not easily damaged during demolding and have a higher reuse rate, while traditional wooden templates are easily damaged during demolding, resulting in a low reuse rate. The material of the second template 6 can be a polymer material with good sealing performance, such as plastic.
[0060] Optionally, the telescopic mechanism 7 includes a hydraulic cylinder; the telescopic mechanism 7 can drive the second template 6 to expand radially along the tunnel and fit tightly against the inner wall surface formed by the tunnel excavation; here, the telescopic mechanism 7 can be a cylinder, hydraulic cylinder, push rod or lead screw, etc., preferably a hydraulic cylinder.
[0061] In summary, this utility model provides a template for a tunnel grout-stopping wall traversing debris flow deposits. By setting a retractable second template on the outside of a first template of fixed size, it adapts to tunnel cross-sections of different sizes. Specifically, the expansion and contraction of the second template can be driven by a telescopic mechanism. When the corresponding tunnel cross-section size is larger than the template size, the telescopic mechanism can push the outer second template to expand, allowing the second template to press against the inner wall of the tunnel. This expanded second template then seals the gap between the template and the tunnel inner wall. Furthermore, the second template also seals the gaps between adjacent second templates and between the second template and the first template. The templates are connected by a staggered structure. When the second template is pushed out and expanded, the staggered structure ensures that there are no gaps between adjacent second templates, as well as between the second template and the first template, maintaining sufficient sealing to prevent grout leakage during pouring. No additional sealing measures are required to stop the leakage. When prefabricating the template, it can be adapted to the smallest possible tunnel cross-section. When encountering a larger tunnel cross-section, the second template can be expanded by the telescopic mechanism to adapt it, enhancing the adaptability of the template. There is no need to customize and replace the template, reducing construction costs and improving construction efficiency.
[0062] 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 template for a grout-stopping wall of a tunnel traversing debris flow deposits, characterized in that, It includes a first template (1) and a second template (6), the second template (6) including a plurality of second sub-templates (61) spliced together, the plurality of second sub-templates (61) surrounding the first template (1) in the circumferential direction of the tunnel; The second sub-template (61) is connected to the first template (1) by a telescopic mechanism (7). The telescopic mechanism (7) can drive the second template (6) to expand radially along the tunnel and fit tightly against the inner wall surface formed by the tunnel excavation. The adjacent second sub-templates (61) are connected by a staggered structure (8) as well as the second sub-templates (61) and the first template (1).
2. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 1, characterized in that, The staggered structure (8) includes a first staggered surface (81) and a second staggered surface (82) that fit together.
3. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 2, characterized in that, Both the first misaligned surface (81) and the second misaligned surface (82) are coated with lubricating oil.
4. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 2 or 3, characterized in that, The first staggered surface (81) is provided with a slide rail (83), and the second staggered surface (82) is provided with a slide groove (84). The slide rail (83) and the slide groove (84) are compatible with each other.
5. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 2 or 3, characterized in that, Both the first misaligned surface (81) and the second misaligned surface (82) are magnetic materials that can attract each other.
6. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 1, characterized in that, It also includes an orifice tube (2), and the first template (1) has several through positioning holes (111). The orifice tube (2) corresponds one-to-one with the several positioning holes (111) and passes through the positioning holes (111). The orifice tube (2) is detachably connected to the first template (1).
7. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 6, characterized in that, One end of the orifice pipe (2) is provided with a flange (3), which is detachably connected to the first template (1).
8. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 7, characterized in that, The outer diameter of one end of the orifice pipe (2) with the flange (3) is larger than the outer diameter of the other end of the orifice pipe (2).
9. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 1, characterized in that, It also includes connecting rods. The first template (1) includes several first sub-templates (11) spliced together, and the connecting rods are connected between the spliced first sub-templates (11).
10. The template for the tunnel grout-stopping wall traversing debris flow deposits according to claim 9, characterized in that, The connecting rod includes several transverse connecting rods (4) and several longitudinal connecting rods (5).