Auxiliary mounting device for circumferential blind pipe of tunnel

Abstract

The utility model relates to the technical field of tunnels and underground engineering, in particular to a tunnel circumferential blind pipe auxiliary installation device which comprises two fastening steel pipes and a plurality of arc-shaped fixing rings which are longitudinally arranged in parallel. The two fastening steel pipes are longitudinally arranged on the two sides of the arc-shaped fixing ring, and the two fastening steel pipes are correspondingly connected with bottom feet on the two sides of the arc-shaped fixing ring, so that the fastening steel pipes and the arc-shaped fixing ring form an integral cylindrical arch-shaped frame; in the installation process, the geotechnical cloth and the waterproof plate are sequentially attached to the outer portion of the tunnel annular blind pipe, and the tunnel annular blind pipe and the geotechnical cloth and the waterproof plate outside the tunnel annular blind pipe are integrally clamped in the cylindrical arch-shaped frame. The utility model has the beneficial effects that the close fitting degree of the annular blind pipe and the waterproof plate during installation and the straight firmness of the blind pipe during installation can be improved, the installation precision and the installation quality of the annular blind pipe are improved, the structure is simple, and the operation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to tunnels and underground engineering, specifically to an auxiliary installation device for circumferential blind pipes in tunnels. Background Technology

[0002] Tunnel waterproofing and drainage are crucial factors in ensuring tunnel safety and quality. The waterproofing membrane, drainage holes, and blind drainage pipes of the tunnel secondary lining are important construction procedures for tunnel waterproofing. In current tunnel waterproofing and drainage construction, blind pipes are frequently installed, especially in water-rich sections where denser blind pipe measures are taken. The blind pipes and waterproofing membranes interact significantly, often resulting in incomplete sealing of the waterproofing membrane at the drainage blind pipe locations, with wrinkles, bulges, and loose adhesion. This makes it easy for voids to appear behind the secondary lining at the blind pipe locations, indirectly leading to quality problems such as structural, strength, and durability issues of the tunnel secondary lining concrete.

[0003] Patent publication number CN217582230U, entitled "A Fixing Device for Circumferential Drainage Blind Pipes in Tunnels," proposes a fixing device for circumferential drainage blind pipes in tunnels. This device includes an anchor plate, an inclined plate, and a straight plate. Two inclined plates are located on either side of the straight plate, connected by an arc-shaped plate. The other end of the inclined plate is connected to the anchor plate. Several partition plates are welded and fixed perpendicularly to the straight plate. This device can be manufactured with fixing devices of different widths according to the number of parallel circumferential drainage blind pipes, enabling synchronous installation. It has a simple structure, is easy to manufacture and install, and effectively improves the installation speed. However, this device cannot guarantee the sealing effect of the waterproof membrane at the drainage blind pipe, and wrinkles and bulges are easily caused during installation, resulting in a loose seal.

[0004] Patent publication number CN110173303A, entitled "A Method for Sealing a Drainage Blind Pipe and Waterproof Membrane in a Tunnel," proposes a method for sealing a drainage blind pipe and waterproof membrane in a tunnel. The method includes the following steps: construction preparation, drilling holes in the waterproof membrane and inserting it through the drainage blind pipe, fabricating a waterproof membrane cylinder, cutting the waterproof membrane cylinder, welding the waterproof membrane cylinder, fabricating and installing annular waterproof membrane patches, fabricating and installing strip waterproof patches, and checking for airtightness. This method, by cutting and welding the waterproof membrane cylinder and installing annular and strip waterproof membrane patches, achieves a good seal at the point where the drainage blind pipe passes through the waterproof membrane, reaching a zero-leakage waterproofing standard. However, this technology involves complex construction steps, is labor-intensive, and is not conducive to rapid on-site construction.

[0005] Therefore, in order to overcome the problems existing in the prior art, an auxiliary installation device for circumferential blind pipes in tunnels is proposed, which can improve the installation accuracy and quality of circumferential blind pipes, and has a simple structure and is easy to operate. Utility Model Content

[0006] The purpose of this utility model is to address at least one of the aforementioned shortcomings of the existing technology. For example, one objective of this utility model is to address the quality problems that easily occur during the installation of tunnel circumferential blind pipes and waterproof membranes, such as poor adhesion between the blind pipe and the waterproof membrane, and wrinkles and bulges in the waterproof membrane. This utility model proposes an auxiliary installation device for tunnel circumferential blind pipes that can improve the tightness of the adhesion between the blind pipe and the waterproof membrane, the straightness and firmness of the blind pipe installation, and the installation accuracy and quality of the blind pipe. Furthermore, this device has a simple structure and is easy to operate.

[0007] To achieve the above objectives, this utility model proposes an auxiliary installation device for a tunnel circumferential blind pipe. The device includes two fastening steel pipes and multiple longitudinally parallel arc-shaped fixing rings. The two fastening steel pipes are longitudinally arranged on both sides of the arc-shaped fixing rings, and the two fastening steel pipes are correspondingly connected to the bottom feet on both sides of the arc-shaped fixing rings, so that the fastening steel pipes and the arc-shaped fixing rings form an integral cylindrical arch frame. During the installation process, geotextile and waterproof membrane are sequentially attached to the outside of the tunnel circumferential blind pipe, and the tunnel circumferential blind pipe and the geotextile and waterproof membrane outside it are integrally clamped in the cylindrical arch frame.

[0008] In a preferred embodiment of this solution, a transverse pressure bar is connected to the outer side of the bottom foot of each of the plurality of arc-shaped fixing rings, so that a set of horizontal compaction bars are formed on both sides of the tunnel circumferential blind pipe auxiliary installation device.

[0009] In a preferred embodiment of this solution, the length of the transverse pressure bar is 20cm to 30cm.

[0010] In a preferred embodiment of this solution, the transverse pressure bar is welded to the arc-shaped fixing ring.

[0011] In a preferred embodiment of this solution, the transverse pressure bar and the arc-shaped fixing ring connected thereto form an integral structure.

[0012] In a preferred embodiment of this solution, the tunnel circumferential blind pipe auxiliary installation device further includes two longitudinal connecting rods; the two longitudinal connecting rods are correspondingly connected to the outer ends of the transverse pressure rods of the two sets of horizontal compaction rods. The longitudinal connecting rods connect the transverse pressure rods into a whole, which helps to ensure the structural stability of the two sets of horizontal compaction rods.

[0013] In a preferred embodiment of this solution, the tunnel circumferential blind pipe auxiliary installation device further includes a central connecting rod; the central connecting rod is longitudinally connected to the top of each arc-shaped fixing ring to reinforce the tunnel circumferential blind pipe auxiliary installation device.

[0014] In a preferred embodiment of this solution, a longitudinal handle is also provided in the middle of the central connecting rod; the two ends of the longitudinal handle are fixed to the central connecting rod, and the longitudinal handle is longitudinally arranged on the outside of the cylindrical arch frame to facilitate handheld operation during on-site construction.

[0015] In a preferred embodiment of this solution, the arc-shaped fixing ring, the transverse pressure bar, the longitudinal connecting bar, and the central connecting bar are all round steel.

[0016] In a preferred embodiment of this solution, the transition between the arc-shaped fixing ring and the transverse pressure bar is an arc-shaped structure; the fastening steel pipe is welded to the arc-shaped structure, and its bottom is provided with a groove corresponding to the arc-shaped structure, so that after welding, the bottom of the fastening steel pipe is flush with the bottom of the arc-shaped structure.

[0017] In a preferred embodiment of this solution, the diameter of the round steel is 8mm to 16mm; the diameter of the fastening steel pipe is 15mm to 32mm, and the wall thickness of the fastening steel pipe is 2mm to 4mm.

[0018] Compared with the prior art, the beneficial effects of this utility model include at least one of the following:

[0019] (1) The proposed solution provides an auxiliary installation device for a tunnel circumferential blind pipe. The device includes two fastening steel pipes and multiple longitudinally parallel arc-shaped fixing rings. The two fastening steel pipes are longitudinally arranged on both sides of the arc-shaped fixing rings, and transverse pressure bars are connected to the outer side of the bottom of the arc-shaped fixing rings. The fastening steel pipes can compact the waterproof membranes that are tightly attached to both sides of the circumferential blind pipe, ensuring that the waterproof membranes are tightly attached to the circumferential blind pipe and improving the longitudinal straightness of the waterproof membranes on both sides. The several transverse pressure bars compact the waterproof membranes within a range of 20cm to 30cm on both sides of the circumferential blind pipe, which can improve the flatness of the waterproof membranes. In addition, the transverse pressure bars can serve as a reference line for the construction of the reinforced gaskets on both sides of the circumferential blind pipe, which can help improve the overall linearity of the gasket construction and ensure that the linearity is straight, standard, and aesthetically pleasing.

[0020] Therefore, this solution is standard and aesthetically pleasing. Using the auxiliary installation device of this solution for the installation of circumferential blind pipes has the characteristics of straight circumferential blind pipes after installation, tight adhesion between the blind pipes and the waterproof membrane to improve the fixing effect, quick and efficient application of gaskets, and standard and aesthetically pleasing linearity. It ensures the installation quality of circumferential blind pipes and avoids deviation during the later concrete pouring. It has become a construction highlight in tunnel construction and meets the current standardized requirements for tunnel construction.

[0021] (2) The tunnel circumferential blind pipe auxiliary installation device proposed in this scheme is simple to process and install. This scheme uses common round steel and steel pipes commonly used in construction for processing and manufacturing. The materials are readily available, and the structural design is simple and the processing difficulty is small. The auxiliary installation device is centrally processed by the steel bar processing plant according to the designed structural dimensions. The dimensions are uniform, the overall structure is lightweight, and it can be operated with only one hand when used on site, making it easy to use.

[0022] (3) The tunnel circumferential blind pipe auxiliary installation device proposed in this solution can be reused repeatedly. The auxiliary installation device is made of strong steel bars and steel pipes and is not easily damaged during construction. The auxiliary installation device can be reused in the tunnel circumferential blind pipe construction process, which can improve the installation progress and quality of the circumferential blind pipe and help save construction costs. Attached Figure Description

[0023] The above and other objects and / or features of this utility model will become clearer from the following description taken in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 A schematic diagram of an exemplary embodiment of the tunnel circumferential blind pipe auxiliary installation device of the present invention is shown.

[0025] Figure 2 This diagram shows a cross-sectional view of an exemplary embodiment of a tunnel circumferential blind pipe auxiliary installation device according to the present invention.

[0026] Explanation of key figure labels:

[0027] 1. Arc-shaped fixing ring; 2. Horizontal pressure bar; 3. Longitudinal connecting rod; 4. Fastening steel pipe; 5. Longitudinal handle; 6. Middle connecting rod. Detailed Implementation

[0028] In the following description, an auxiliary installation device for a tunnel circumferential blind pipe according to the present invention will be explained in detail with reference to exemplary embodiments.

[0029] It should be noted that terms such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," and "bottom" are used only to facilitate the description and formation of relative orientations or positional relationships, and do not indicate or imply that the component referred to must have that specific orientation or position.

[0030] Example

[0031] refer to Figure 1 , Figure 2 As shown, a tunnel circumferential blind pipe auxiliary installation device includes two fastening steel pipes 4 and multiple longitudinally parallel arc-shaped fixing rings 1 (e.g., 3 or 4 arc-shaped fixing rings 1 arranged in parallel). The two fastening steel pipes 4 are longitudinally arranged on both sides of the arc-shaped fixing rings 1, and the two fastening steel pipes 4 are correspondingly connected to the bottom feet on both sides of the arc-shaped fixing rings 1, so that the fastening steel pipes 4 and the arc-shaped fixing rings 1 form an integral cylindrical arch frame. A transverse pressure bar 2 is connected to the outer side of the bottom foot of each arc-shaped fixing ring 1. The multiple transverse pressure bars 2 of the multiple arc-shaped fixing rings 1 are located on the same plane, so that a set of horizontal compaction bars are formed on both sides of the tunnel circumferential blind pipe auxiliary installation device.

[0032] During installation, the geotextile and waterproof membrane are sequentially attached to the outside of the tunnel circumferential blind pipe, and the tunnel circumferential blind pipe and its external geotextile and waterproof membrane are integrally clamped within the cylindrical arch frame. A fastening steel pipe 4 on each side facilitates the compaction and sealing of the waterproof membrane on both sides of the circumferential blind pipe. Simultaneously, the fastening steel pipe 4 prevents damage to the device and the waterproof membrane. Several transverse pressure rods 2 are installed on both sides of the fastening steel pipe 4 to compact and seal the waterproof membrane at the hot-melt gasket positions on both sides of the circumferential blind pipe, thereby improving the installation firmness and alignment of the gaskets on both sides of the circumferential blind pipe, and enhancing the longitudinal straightness of the waterproof membrane on both sides.

[0033] Furthermore, in this example, the length of the transverse pressure bar 2 is 20cm to 30cm; several transverse pressure bars 2 are set on both sides to compact the waterproof membrane within a range of 20 to 30cm on both sides of the circumferential blind pipe, improve the flatness of the waterproof membrane laying, and at the same time, the transverse pressure bar 2 serves as a reference line for the construction of the dense gaskets on both sides of the circumferential blind pipe, improving the overall linearity of the gasket construction and ensuring that the linearity is straight, standard and beautiful.

[0034] In this example, the transverse pressure bar 2 and the arc-shaped fixing ring 1 are welded together, or the transverse pressure bar 2 and the arc-shaped fixing ring 1 connected to it are an integral structure, which is simple and stable.

[0035] Furthermore, in this example, the tunnel circumferential blind pipe auxiliary installation device also includes two longitudinal connecting rods 3; the two longitudinal connecting rods 3 are correspondingly connected to the outer ends of the transverse pressure rods 2 of the two sets of horizontal compaction rods. The longitudinal connecting rods 3 connect the transverse pressure rods 2 into a whole, which helps to further ensure the stability of the structure.

[0036] In this example, the tunnel circumferential blind pipe auxiliary installation device also includes a central connecting rod 6; the central connecting rod 6 is longitudinally connected to the top of each arc-shaped fixing ring 1 to reinforce the tunnel circumferential blind pipe auxiliary installation device.

[0037] refer to Figure 1 As shown in this example, a longitudinal handle 5 is provided on the top of the tunnel circumferential blind pipe auxiliary installation device to facilitate on-site construction operations; specifically, the bottom two ends of the longitudinal handle 5 are fixed on the middle connecting rod 6, and the longitudinal handle 5 is longitudinally set on the outside of the cylindrical arch frame.

[0038] refer to Figure 1 , Figure 2 As shown, in this example, the arc-shaped fixing ring 1, the transverse pressure bar 2, the longitudinal connecting bar 3, the longitudinal handle 5, and the middle connecting bar 6 are all round steel; the transition between the arc-shaped fixing ring 1 and the transverse pressure bar 2 is an arc-shaped structure; the fastening steel pipe 4 is welded to the arc-shaped structure, and its bottom is provided with a groove corresponding to the arc-shaped structure so that the bottom of the fastening steel pipe 4 is flush with the bottom of the arc-shaped structure after welding.

[0039] Example

[0040] The innovation of this solution lies in minimizing costs by using different models of circumferential blind pipes, simplifying the auxiliary installation devices for blind pipes, improving on-site construction efficiency, and enabling rapid and accurate installation of circumferential blind pipes. At the same time, it can improve the longitudinal straightness and flatness of the waterproof membrane on both sides, which is conducive to improving the installation quality of circumferential blind pipes and waterproof membranes at circumferential blind pipe locations.

[0041] The specific solution in this embodiment is as follows: It mainly adopts a "π"-shaped auxiliary installation device made of steel pipes and round steel, as referenced. Figure 1 , Figure 2 As shown, the arc-shaped part in the middle of the device is slightly enlarged according to the diameter of the installed circumferential blind pipe to serve as an arc-shaped fixing ring 1. There is a fastening steel pipe 4 on each side of the arc-shaped fixing ring 1 to facilitate the compaction and tight sealing of the waterproof membrane on both sides of the circumferential blind pipe. At the same time, the fastening steel pipe 4 avoids damage to the device and the waterproof membrane. Several transverse pressure rods 2 are set on both sides of the fastening steel pipe 4 to compact and seal the waterproof membrane at the position of the hot melt gasket on both sides of the circumferential blind pipe, which facilitates the installation firmness and installation line of the dense gasket on both sides of the circumferential blind pipe. A longitudinal handle 5 is set on the top of the device to facilitate on-site construction operations.

[0042] Furthermore, in this embodiment, based on the diameter of the tunnel circumferential blind pipe, and considering the installation thickness of the geotextile and waterproof membrane as well as a certain degree of slack, the size of the arc-shaped fixing ring 1 in the middle of the installation device is determined to ensure that the arc-shaped fixing ring 1 can effectively hold the circumferential blind pipe in place, avoiding the situation where the arc-shaped fixing ring 1 is too large, resulting in the waterproof membrane not fitting tightly to the circumferential blind pipe, or the arc-shaped fixing ring is too small, resulting in the inability to hold the circumferential blind pipe in place.

[0043] Furthermore, in this solution, a steel pipe is welded to each side of the bottom of the arc-shaped fixing ring 1 as a fastening steel pipe 4 for the circumferential blind pipe, which presses the waterproof plate tightly against both sides of the circumferential blind pipe to ensure that the waterproof plate is tightly attached to the circumferential blind pipe and improve the longitudinal straightness of the waterproof plate on both sides.

[0044] In this embodiment, several transverse pressure bars 2 are set on both sides of the fastening steel pipe 4. The length of the transverse pressure bars 2 is 20cm to 30cm. They can compact the waterproof membrane within a range of 20 to 30cm on both sides of the circumferential blind pipe, improve the flatness of the waterproof membrane laying, and at the same time, the transverse pressure bars 2 can serve as a reference line for the construction of the dense gaskets on both sides of the circumferential blind pipe, which can help improve the overall linearity of the gasket construction and ensure that the linearity is straight, standard and beautiful.

[0045] In this embodiment, a longitudinal connecting rod 3 is provided at the ends of the transverse pressure rods 2 on both sides of the arc-shaped fixing ring 1 to connect the components into a whole device. A central connecting rod 6 is provided in the middle of the arc-shaped fixing ring 1, and a longitudinal handle 5 is provided on the central connecting rod 6 in the middle of the arc-shaped fixing ring 1. The longitudinal handle 5 is designed to facilitate one-handed use during on-site operation.

[0046] Furthermore, in this solution, the arc-shaped fixing ring 1, the transverse pressure rod 2, the longitudinal connecting rod 3, the longitudinal handle 5, and the middle connecting rod 6 are all round steel; the transition between the arc-shaped fixing ring 1 and the transverse pressure rod 2 is an arc-shaped structure; the fastening steel pipe 4 is welded to the arc-shaped structure, and its bottom is provided with a groove corresponding to the arc-shaped structure, so that after welding, the bottom of the fastening steel pipe 4 is flush with the bottom of the arc-shaped structure.

[0047] In this embodiment, preferably, the diameter of the round steel is 16mm; the diameter of the fastening steel pipe 4 is 25mm; and the wall thickness of the fastening steel pipe 4 is 2.8mm.

[0048] Operating steps:

[0049] (1) Normally, hot melt gaskets are used to lay the tunnel geotextile longitudinally to the circumferential blind pipe installation location;

[0050] (2) Place the circumferential blind pipe tightly against the initial support surface, cover it with geotextile tightly against the circumferential blind pipe, and then use an auxiliary installation device to press the geotextile tightly against the initial support surface in the circumferential blind pipe.

[0051] (3) Using the transverse compression bar of the auxiliary installation device as a reference, the circumferential blind pipe is reinforced with gaskets on both sides, and the geotextile is fixed to the initial support surface.

[0052] (4) When the waterproof membrane is laid to the circumferential blind pipe, the construction process shall be carried out in accordance with the geotextile laying process. After the waterproof membrane and the geotextile are compacted in the circumferential blind pipe, the waterproof membrane and the hot melt gasket shall be welded to complete the operation.

[0053] Although the present invention has been described above in conjunction with exemplary embodiments and accompanying drawings, those skilled in the art should understand that various modifications can be made to the above embodiments without departing from the spirit and scope of the claims.

Claims

1.A tunnel ring blind pipe auxiliary installation device, characterized in that: it comprises two fastening steel pipes (4) and a plurality of longitudinally parallel arranged arc-shaped fixing rings (1) ; the two fastening steel pipes (4) are longitudinally arranged on both sides of the arc-shaped fixing rings (1), and the two fastening steel pipes (4) are connected to the corresponding bottom feet of the two sides of the arc-shaped fixing rings (1), so that the fastening steel pipes (4) and the arc-shaped fixing rings (1) form an integral cylindrical arched frame; during installation, geotextile and waterproof board are sequentially attached to the outside of the tunnel ring blind pipe, and the tunnel ring blind pipe and the geotextile and waterproof board outside thereof are integrally clamped in the cylindrical arched frame. 2.The tunnel ring blind pipe auxiliary installation device according to claim 1, characterized in that: a lateral pressing rod (2) is connected to the outside of the bottom foot of each of the plurality of arc-shaped fixing rings (1), so that a set of horizontal pressing rods is formed on each side of the tunnel ring blind pipe auxiliary installation device. 3.The tunnel ring blind pipe auxiliary installation device according to claim 2, characterized in that: the length of the lateral pressing rod (2) is 20cm-30cm. 4.The tunnel ring blind pipe auxiliary installation device according to claim 3, characterized in that: the lateral pressing rod (2) is welded to the arc-shaped fixing ring (1). 5.The tunnel ring blind pipe auxiliary installation device according to claim 2, characterized in that: the tunnel ring blind pipe auxiliary installation device further comprises two longitudinal connecting rods (3) ; the two longitudinal connecting rods (3) are connected to the outer ends of the lateral pressing rods (2) of the two sets of horizontal pressing rods. 6.The tunnel ring blind pipe auxiliary installation device according to any one of claims 1-5, characterized in that: the tunnel ring blind pipe auxiliary installation device further comprises a middle connecting rod (6) ; the middle connecting rod (6) is longitudinally connected to the top of each arc-shaped fixing ring (1) to reinforce the tunnel ring blind pipe auxiliary installation device. 7.The tunnel ring blind pipe auxiliary installation device according to claim 6, characterized in that: a longitudinal handle (5) is further arranged in the middle of the middle connecting rod (6) ; the longitudinal handle (5) is fixed to the middle connecting rod (6) at both ends, and the longitudinal handle (5) is longitudinally arranged outside the cylindrical arched frame, so as to facilitate hand operation during on-site construction. 8.The tunnel ring blind pipe auxiliary installation device according to claim 6, characterized in that: the arc-shaped fixing ring (1), the lateral pressing rod (2), the longitudinal connecting rod (3), and the middle connecting rod (6) are all round steel. 9.The tunnel ring blind pipe auxiliary installation device according to claim 8, characterized in that: the connection transition between the arc-shaped fixing ring (1) and the lateral pressing rod (2) is in a circular arc structure; the fastening steel pipe (4) is welded at the circular arc structure, and a notch is formed in the bottom of the fastening steel pipe (4) corresponding to the circular arc structure, so that the bottom of the fastening steel pipe (4) is flush with the bottom of the circular arc structure after welding. 10.The tunnel ring blind pipe auxiliary installation device according to claim 8, characterized in that: the diameter of the round steel is 8mm-16mm. The diameter of the fastening steel pipe (4) is 15 mm to 32 mm, and the wall thickness of the fastening steel pipe (4) is 2 mm to 3 mm.

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