Drainage blind pipe protection device and filling formwork

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a drainage blind pipe protection device and a filling formwork. The drainage blind pipe protection device comprises a mold main body, the mold main body comprises a concave part and a mounting part located on the periphery of the concave part, the mounting part is provided with a mounting hole position, and the bottom of the concave part is provided with a reserved opening matched with the end of a drainage pipe; the mounting assembly comprises a plurality of mounting pieces matched with the mounting hole positions and is used for fixing the mounting part on one side of the filling template; and under the condition that the mold body is fixed to the filling mold plate through the mounting assembly, a protection cavity used for containing the end of the drainage pipe is formed between the concave part and the filling mold plate. According to the scheme, the problem that in the prior art, a drainage blind pipe is prone to being blocked and damaged in the concrete pouring process is solved, efficient protection on the drainage blind pipe in the concrete pouring process is achieved, the concrete invasion resistance of the drainage blind pipe is enhanced, and therefore the continuous effectiveness and structural safety of a drainage system in a tunnel inverted arch filling layer are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a drainage blind pipe protection device and a filling formwork. Background Art

[0002] In the field of tunnel engineering, the drainage blind pipe inside the invert filling layer is an indispensable part of the tunnel waterproof and drainage system. Its core task is to efficiently guide groundwater and infiltrated water, direct it to the longitudinal drainage network, thereby maintaining the dry state inside the tunnel, avoiding erosion and damage to the tunnel structure, and ensuring driving safety and the service life of the tunnel.

[0003] Currently, geotextiles are widely used as the plugging material for drainage blind pipes in the industry. The aim is to form a protective barrier during the concrete pouring stage to prevent the intrusion of cement slurry and block the drainage channel. However, when facing concrete pouring, the plugging strength and sealing performance of geotextiles are extremely prone to displacement or damage under high-pressure impact, and thus cannot effectively isolate the direct contact between concrete and the drainage pipe. Once the concrete slurry invades the inside of the drainage pipe, it will not only cause the pipe to be blocked and hinder the normal drainage process, but also the curing pressure of the concrete may cause physical damage to the drainage pipe, such as deformation or rupture, threatening the overall drainage efficiency and structural safety of the tunnel. Content of the Utility Model

[0004] The utility model provides a drainage blind pipe protection device and a filling formwork, aiming to solve the problem that the drainage blind pipe is easily blocked and damaged during the concrete pouring process in the prior art, realizing the efficient protection of the drainage blind pipe during the concrete pouring process, enhancing its ability to resist the intrusion of concrete, and thus ensuring the continuous effectiveness of the drainage system and the structural safety inside the tunnel invert filling layer.

[0005] The utility model provides a drainage blind pipe protection device, including: a mold main body, including a concave part and an installation part located around the concave part, the installation part is provided with installation holes, and the bottom of the concave part is provided with a reserved opening adapted to the end of the drainage pipe; an installation component, including a plurality of installation pieces adapted to the installation holes, for fixing the installation part to one side of the filling formwork; when the installation component fixes the mold main body to the filling formwork, a protection cavity for accommodating the end of the drainage pipe is formed between the concave part and the filling formwork.

[0006] According to a drainage blind pipe protection device provided by the utility model, the reserved opening is circular, the inner diameter of the circular reserved opening is larger than the outer diameter of the drainage pipe, and the difference between the inner diameter of the reserved opening and the outer diameter of the drainage pipe is greater than or equal to 10mm.

[0007] A drainage blind pipe protection device provided by the present utility model, wherein the cross-sectional shape of the concave portion is trapezoidal; the installation portion is located on the wide-angle side of the concave portion.

[0008] A drainage blind pipe protection device provided by the present utility model, wherein the installation portion is rectangular, and the installation hole positions are respectively located at the four corner positions of the installation portion.

[0009] A drainage blind pipe protection device provided by the present utility model, wherein the installation assembly includes a long-shaped cushion block, and the cushion block is provided with through holes adapted to the installation members; in the installation state, the two through holes of each cushion block are respectively aligned with the two installation hole positions of the installation portion, and the installation members sequentially pass through the through holes of the cushion block, the filling template, and the installation hole positions to fix the mold body.

[0010] A drainage blind pipe protection device provided by the present utility model, wherein the cushion block is a hollow tubular member.

[0011] A drainage blind pipe protection device provided by the present utility model, wherein the mold body is welded by a plurality of steel plates with uniform thickness, and the thickness of the steel plate is greater than or equal to 3 mm.

[0012] The present utility model further provides a filling template provided with the drainage blind pipe protection device according to any one of the above embodiments.

[0013] A filling template provided by the present utility model, comprising a fixing portion and a baffle portion; the fixing portion is fixedly arranged on the inner wall of the tunnel; the baffle portion is used to block the filling material on one side of the baffle portion, and the baffle portion is provided with an installation position adapted to the drainage blind pipe protection device.

[0014] A filling template provided by the present utility model, wherein the cross-sectional shape of the fixing portion is arc-shaped adapted to the shape of the inner wall of the tunnel; the fixing portion is provided with a plurality of fixing members anchored to the inner wall along the arc direction.

[0015] For the drainage blind pipe protection device and the filling template provided by the present utility model, the drainage blind pipe protection device forms a protection cavity by means of a reserved opening design in which the concave portion is adapted to the end of the drainage pipe, and combines the installation assembly to firmly fix the mold body to the filling template, effectively isolating the direct contact between the concrete and the drainage pipe. The filling template is configured with this drainage blind pipe protection device, which can significantly improve the anti-intrusion performance of the drainage blind pipe during the concrete pouring process, avoid blockage and physical damage, ensure the continuous and efficient operation of the drainage system of the tunnel invert filling layer, and strengthen the safety of the tunnel structure. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a top view structural schematic diagram of the drainage blind pipe protection device provided by the present utility model.

[0018] Figure 2 It is a side sectional view structural schematic diagram of the drainage blind pipe protection device provided by the present utility model.

[0019] Figure 3 It is an assembly structural schematic diagram of the drainage blind pipe protection device and the filling template provided by the present utility model.

[0020] Figure 4 It is a usage state schematic diagram of the filling template provided by the present utility model.

[0021] Reference numerals:

[0022] 11, concave part; 12, installation part; 13, reserved opening; 14, protection cavity; 21, installation member; 22, cushion block; 31, fixing part; 32, baffle part; 33, fixing member. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model with reference to the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0024] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. It should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The following will combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4 describe the specific embodiments of the drainage blind pipe protection device and the filling template of the present utility model.

[0026] The present utility model provides a drainage blind pipe protection device, which includes a mold main body and an installation component. Among them, the mold main body includes a concave part 11 and an installation part 12 located around the concave part 11. The installation part 12 is provided with installation holes, and a reserved opening 13 adapted to the end of the drainage pipe is provided at the bottom of the concave part 11. The installation component includes a plurality of installation parts 21 adapted to the installation holes for fixing the installation part 12 to one side of the filling template. When the installation component fixes the mold main body to the filling template, a protection cavity 14 for accommodating the end of the drainage pipe is formed between the concave part 11 and the filling template. By fixing the mold main body to one side of the filling template through the installation component, a protection cavity 14 for accommodating the open end of the drainage pipe is formed, effectively isolating the concrete and preventing it from invading the drainage pipe.

[0027] Specifically, a reserved opening 13 is provided at the bottom of the concave part 11 of the mold main body, and the size of the opening matches the end of the drainage pipe to ensure that the drainage pipe can be inserted. The installation part 12 outside the concave part 11 is used to cooperate with the installation component to fix the whole device. Through the installation component, the mold main body can be firmly fixed to one side of the filling template.

[0028] After the installation component fixes the mold body on the filling template, a protection cavity 14 is formed between the concave portion 11 and the filling template, and this protection cavity 14 can be used to accommodate the open end of the drain pipe. During the concrete pouring process, the end of the drain pipe is safely hidden inside the protection cavity 14, effectively isolating the concrete slurry and preventing it from invading the inside of the drain pipe, thus avoiding the risks of blockage and damage.

[0029] To enhance the protection effect, plugging materials such as geotextiles can also be filled in the protection cavity 14 to serve as an additional barrier to further protect the drain pipe, ensuring that the drain pipe can still be protected from the intrusion of concrete under extreme conditions during concrete pouring and maintaining the integrity of its drainage function. This double protection measure combines the advantages of mechanical protection and material plugging, providing all-round protection for the drain pipe, thus ensuring the long-term effectiveness and structural safety of the drainage system in the tunnel invert filling layer.

[0030] Preferably, the depth of the above-mentioned protection cavity 14 can be set to more than 72 mm to fully protect the end of the drain pipe.

[0031] According to a drain pipe protection device provided by the present utility model, the reserved opening 13 is circular, the inner diameter of the circular reserved opening 13 is larger than the outer diameter of the drain pipe, and the difference between the inner diameter of the reserved opening 13 and the outer diameter of the drain pipe is greater than or equal to 10 mm. Among them, the circular reserved opening 13 matches the circular cross-section of the drain pipe. The inner diameter of the circular reserved opening 13 is set to be larger than the outer diameter of the drain pipe, and the difference between the two is at least 10 mm, making it easier for the end of the drain pipe to pass through. Even if there are certain position deviations during the construction process, it can ensure the smooth placement of the drain pipe, reducing the installation difficulty and time.

[0032] According to a drain pipe protection device provided by the present utility model, the cross-sectional shape of the concave portion 11 is trapezoidal; the installation portion 12 is located on the wide-angle side of the concave portion 11. Among them, corresponding to the wider side of the trapezoid, facing the wide-angle opening of the concave portion 11, it can better fit with the filling template or the surface of the tunnel structure, facilitating the installation and fixation of the device. The installation portion 12 is located on the wide-angle side of the concave portion 11, which not only enables the installation portion 12 to make full use of the broad space provided by the trapezoidal structure to facilitate the placement of installation components such as bolts or nuts, but also is conducive to the stable fixation of the entire device on the filling template. Correspondingly, the narrower side of the trapezoid is located at the bottom of the concave portion 11, that is, the side for setting the reserved opening 13.

[0033] A drainage blind pipe protection device provided by the present utility model, the installation part 12 is rectangular, which not only endows the device with structural stability, but also facilitates its precise docking with the filling template. The installation hole positions are preferably located at the four corner positions of the installation part 12 respectively, forming a flange positioning structure similar to a rectangular frame. Through the flange positioning structure similar to a rectangular frame, not only the contact area with the filling template is increased, the sealing performance and the fitting degree are improved, but also the subsequent inspection and maintenance are facilitated. The installation hole positions are evenly distributed through the four corner points, which can ensure that when the device is subjected to external forces, the forces can be evenly dispersed, avoiding structural damage caused by excessive local stress, and improving the durability and safety of the device. The minimum distance between the installation hole positions is preferably greater than or equal to 350 mm.

[0034] A drainage blind pipe protection device provided by the present utility model, the installation assembly includes a long-shaped cushion block 22, and the cushion block 22 is provided with through holes adapted to the installation parts 21; in the installed state, the two through holes of each cushion block 22 are respectively aligned with the two installation hole positions of the installation part 12, and the installation parts 21 sequentially pass through the through holes of the cushion block 22, the filling template and the installation hole positions to fix the mold body. Among them, the cushion block 22 is designed to be strip-shaped, and its length direction is attached to the surface of the filling template, which helps to expand the contact area between the cushion block 22 and the filling template, ensuring a more uniform force distribution, thereby enhancing the fixing effect. Each cushion block 22 is provided with through holes adapted to the installation parts 21 (such as bolts or screws), and the positions of these through holes are precisely aligned with the installation hole positions on the mold body. In the installed state, the through holes of the cushion block 22 and the installation hole positions of the mold body form a straight line, so that the installation parts 21 can pass through smoothly, realizing the connection between the mold body and the filling template. The presence of the cushion block 22 avoids the direct extrusion contact between the installation parts 21 and the filling template, reducing the friction and wear between the two. Especially for high-hardness installation parts 21, such as bolts, without the cushion block 22, it may cause scratches or depressions on the filling template, affecting the performance of the structure.

[0035] A drainage blind pipe protection device provided by the present utility model, the cushion block 22 is a hollow tubular part. Based on the toughness of its own material, such as steel, the hollow tubular part can produce slight deformation when subjected to external forces, and this deformation can offset part of the vibration and impact, thereby effectively preventing the installation parts 21 (such as bolts) from loosening during long-term use or under the influence of external factors, and maintaining the tightness of the connection.

[0036] According to a drainage blind pipe protection device provided by the present utility model, the mold body in each of the above embodiments is preferably welded by a plurality of steel plates with uniform thickness, and the thickness of the steel plate is greater than or equal to 3 mm, so as to ensure that the mold body has sufficient mechanical strength to resist the high pressure and impact force generated during the concrete pouring process, and avoid deformation or damage of the device during construction. Moreover, welding with steel plates of the same thickness is conducive to standardized production, simplifies the manufacturing process of the mold body, and reduces the production cost.

[0037] The present utility model also provides a filling formwork provided with the drainage blind pipe protection device in any one of the above embodiments. By configuring the drainage blind pipe protection device of the present utility model, the filling formwork can significantly improve the anti-intrusion performance of the drainage blind pipe during the concrete pouring process, avoid blockage and physical damage, ensure the continuous and efficient operation of the drainage system of the tunnel invert filling layer, and strengthen the safety of the tunnel structure.

[0038] The filling formwork provided by the present utility model will be described below, and the filling formwork described below can be mutually referred to the drainage blind pipe protection device described above.

[0039] According to a filling formwork provided by the present utility model, it includes a fixing part 31 and a baffle part 32. The fixing part 31 is fixedly arranged on the inner wall of the tunnel; the baffle part 32 is used to block the filling material on one side of the baffle part 32, and the baffle part 32 is provided with an installation position adapted to the drainage blind pipe protection device. Specifically, the main task of the fixing part 31 is to firmly fix the entire filling formwork on the inner wall of the tunnel to ensure the stability and positioning accuracy of the filling formwork during the concrete pouring process, and prevent the filling formwork from moving due to the pouring pressure. The function of the baffle part 32 is to act as a retaining wall during concrete pouring. It is responsible for restricting the filling material (usually concrete) to one side of the formwork to form a predetermined structural shape. The baffle part 32 is provided with an installation position adapted to the drainage blind pipe protection device to facilitate the installation and positioning of the drainage blind pipe protection device.

[0040] According to a filling formwork provided by the present utility model, the cross-sectional shape of the fixing part 31 is an arc adapted to the shape of the inner wall of the tunnel; the fixing part 31 is provided with a plurality of fixing members 33 anchored to the inner wall along the arc direction. The arc-shaped fixing part 31 can closely fit the inner wall of the tunnel and reduce the gap between the formwork and the inner wall. By matching the radian of the inner wall, the fixing part 31 can more evenly distribute the pressure generated during concrete pouring and avoid local stress concentration. The fixing part 31 is provided with a plurality of fixing members 33 anchored to the inner wall along the arc direction. These fixing members 33 (such as expansion bolts, chemical anchor bolts, etc.) ensure the firm connection between the formwork and the inner wall of the tunnel, and can maintain the stability of the formwork even under the condition of high-pressure concrete pouring, preventing displacement or detachment.

[0041] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "mode", "specific mode", or "some modes", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or mode are included in at least one embodiment or mode of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or modes. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or modes described in this specification and the features of different embodiments or modes.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A drainage blind pipe protection device, characterized in that, Comprising: A mold body, including a concave portion (11) and a mounting portion (12) located around the concave portion (11). The mounting portion (12) is provided with mounting holes, and a reserved opening (13) adapted to the end of a drain pipe is provided at the bottom of the concave portion (11); A mounting assembly, including a plurality of mounting members (21) adapted to the mounting holes, for fixing the mounting portion (12) to one side of a filling template; When the mounting assembly fixes the mold body to the filling template, a protection cavity (14) for accommodating the end of the drain pipe is formed between the concave portion (11) and the filling template.

2. The drainage blind pipe protection device according to claim 1, characterized in that, The reserved opening (13) is circular, the inner diameter of the circular reserved opening (13) is larger than the outer diameter of the drain pipe, and the difference between the inner diameter of the reserved opening (13) and the outer diameter of the drain pipe is greater than or equal to 10 mm.

3. The drainage blind pipe protection device according to claim 1, characterized in that The cross-sectional shape of the concave portion (11) is trapezoidal; The mounting portion (12) is located on the wide-angle side of the concave portion (11).

4. The drainage blind pipe protection device according to claim 1, characterized in that, The mounting portion (12) is rectangular, and the mounting holes are respectively located at the four corner positions of the mounting portion (12).

5. The drainage blind pipe protection device according to claim 4, characterized in that, The mounting assembly includes a long-shaped cushion block (22), and the cushion block (22) is provided with through holes adapted to the mounting members (21); In the installed state, the two through holes of each cushion block (22) are respectively aligned with the two mounting holes of the mounting portion (12), and the mounting members (21) sequentially pass through the through holes of the cushion block (22), the filling template, and the mounting holes to fix the mold body.

6. The drainage blind pipe protection device according to claim 5, characterized in that, The cushion block (22) is a hollow tubular member.

7. The drainage blind pipe protection device according to any one of claims 1-6, characterized in that, The mold body is welded by a plurality of steel plates with uniform thickness, and the thickness of the steel plates is greater than or equal to 3 mm.

8. A filling template, characterized in that, A drainage blind pipe protection device according to any one of claims 1 to 7 is provided.

9. The filling template according to claim 8, wherein Including a fixing portion (31) and a baffle portion (32); The fixing portion (31) is fixedly provided on the inner wall of the tunnel; The baffle portion (32) is used to block the filler on one side of the baffle portion (32), and the baffle portion (32) is provided with a mounting position adapted to the drainage blind pipe protection device.

10. The filling template according to claim 9, characterized in that, The cross-sectional shape of the fixing portion (31) is an arc adapted to the shape of the inner wall of the tunnel; The fixing portion (31) is provided with a plurality of fixing members (33) anchored to the inner wall along the arc direction.

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