Tunnel prefabricated crash wall with easy dismounting and its installation and replacement method

Abstract

This invention discloses an easily detachable prefabricated crash barrier for tunnels, along with its installation and replacement methods. It comprises multiple prefabricated crash barrier segments. Each segment has multiple inclined mounting holes between its side facing away from the pavement layer and its bottom. A bolt is inserted into each mounting hole, and each bolt is secured to a pre-embedded sleeve embedded in the tunnel structural slab. Rubber pads are placed between every two adjacent crash barrier segments. During installation and replacement, a forklift is used to lift the prefabricated crash barrier segment into position on the tunnel structural slab. Bolts are then inserted into the mounting holes and secured to the pre-embedded sleeves. Nuts are then placed on the exposed ends of the bolts to fix the corresponding prefabricated crash barrier segment. Finally, a pavement layer consisting of a concrete layer and an asphalt layer is constructed. This invention reduces in-situ curing time, optimizes the construction environment, achieves reliable connection between the prefabricated components and the tunnel structural slab, and facilitates easy replacement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anti-collision wall construction, in particular to a tunnel easy-to-dismount prefabricated anti-collision wall and its installation method and replacement method. BACKGROUND

[0002] In the prior art, the tunnel road anti-collision wall is mainly constructed by cast-in-place, although the prefabricated assembly process is also tried in the industry, and the grouting additional sleeve form is used for connection, but the traditional prefabricated process of cast-in-place still has the following shortcomings:

[0003] 1. The cast-in-place process takes a long time, which is not conducive to schedule control;

[0004] 2. Wet operation not only affects construction efficiency, but also produces dust, solid waste and other materials during transportation, affecting the tunnel environment;

[0005] 3. The prefabricated assembly process of traditional grouting additional sleeve connection has wet operation, mortar mixing affects the working environment, and reduces the construction speed, which is not as convenient as dry installation.

[0006] 4. The traditional prefabricated anti-collision wall is grouted, and it is not easy to dismount when it is damaged, which brings inconvenience to maintenance.

[0007] Therefore, how to reduce the cast-in-place maintenance time, optimize the construction operation environment, realize the safe fixation and easy dismounting and replacement of the prefabricated part has become a technical problem to be solved by the technical personnel in the field. SUMMARY

[0008] In view of the above-mentioned defects of the prior art, the present application provides a tunnel easy-to-dismount prefabricated anti-collision wall and its installation method and replacement method, which realizes the purpose of reducing the cast-in-place maintenance time, optimizing the construction operation environment, realizing the reliable connection of the prefabricated part and the tunnel structure plate, and being easier to replace.

[0009] To achieve the above-mentioned purpose, the present application discloses a tunnel easy-to-dismount prefabricated anti-collision wall, which comprises a plurality of anti-collision wall prefabricated segments arranged on a tunnel structure plate and connected in sequence.

[0010] Among them, the back of each anti-collision wall prefabricated segment away from the paving layer is provided with a plurality of inclined mounting holes between the bottom, a screw rod is arranged in each mounting hole, and each screw rod is fastened with a pre-buried sleeve pre-buried in the tunnel structure plate to realize the fixation with the tunnel structure plate;

[0011] A rubber pad is arranged between every two adjacent anti-collision wall prefabricated segments;

[0012] The outer dimensions of each rubber pad are smaller than the end face of the corresponding anti-collision wall prefabricated segment;

[0013] The part outside the rubber pad at the joint formed after splicing of every two adjacent prefabricated segments of the crash barrier is coated with polysulfide sealant.

[0014] The bottom surface of each prefabricated segment of the crash barrier is provided with two holes for lifting by a forklift.

[0015] Preferably, each mounting hole on the side of the corresponding prefabricated segment of the crash barrier away from the pavement layer comprises a hand hole with a larger inner diameter than the corresponding mounting hole.

[0016] Each screw rod is provided with a nut at the part within the range of the corresponding hand hole.

[0017] Preferably, the mounting holes of each prefabricated segment of the crash barrier are staggered in the corresponding prefabricated segment of the crash barrier at two different distances from the pavement layer.

[0018] Preferably, each rubber pad is a neoprene rubber pad.

[0019] Preferably, the length of each prefabricated segment of the crash barrier is 4 meters, and the side corresponding to the edge line position of the trapezoidal cross section is provided with a chamfer of 5*5 mm; the distance between every two adjacent mounting holes is 0.5-0.75 meters.

[0020] Preferably, the tunnel structure plate is a cast-in-place structure plate or a prefabricated structure plate.

[0021] Preferably, the fastening between each screw rod and the corresponding embedded sleeve is a plug-in sleeve connection mode or a rotating tightening mode.

[0022] Each embedded sleeve is a plastic embedded sleeve.

[0023] Preferably, the edge of each hole is provided with a round corner of 5*5 mm.

[0024] The application also provides a mounting method of the easily detachable prefabricated crash barrier for tunnels, comprising the following steps:

[0025] Step A1, manufacturing the tunnel structure plate and embedding all the embedded sleeves in the tunnel structure plate;

[0026] Step A2, prefabricating all the prefabricated segments of the crash barrier and setting the corresponding mounting holes in each prefabricated segment of the crash barrier;

[0027] Step A3, setting the corresponding rubber pad on the side of each prefabricated segment of the crash barrier connected to another prefabricated segment of the crash barrier;

[0028] Step A4, each of the anti-collision wall prefabricated segment is placed in the tunnel structure plate by forklift;

[0029] After the forklift is withdrawn, the corresponding screw rod is inserted into the corresponding embedded sleeve embedded in the tunnel structure plate through all the installation holes, and is fastened;

[0030] Step A5, a nut is arranged at the end of each of the screw rods exposed from the side of the corresponding anti-collision wall prefabricated segment away from the pavement layer, the corresponding screw rod is locked through the nut, and the corresponding anti-collision wall prefabricated segment is fixed with the tunnel structure plate;

[0031] Step A6, the pavement layer including a concrete layer and an asphalt layer is constructed.

[0032] The application also provides a replacement method of the detachable prefabricated anti-collision wall for a tunnel, comprising the following steps:

[0033] Step B1, each of the screw rods and the corresponding nut of the anti-collision wall prefabricated segment to be replaced are loosened and removed;

[0034] Step B2, the part where the anti-collision wall prefabricated segment is connected with the pavement layer on the side of the anti-collision wall prefabricated segment facing the pavement layer is loosened by a light pick head machine;

[0035] Step B3, the waste anti-collision wall prefabricated segment is placed into a transport vehicle by means of the hole and the forklift after being lifted, and is transported out for disposal after waiting;

[0036] Step B4, the new anti-collision wall prefabricated segment is placed in the tunnel structure plate by the forklift;

[0037] After the forklift is withdrawn, the corresponding screw rod is inserted into the corresponding embedded sleeve embedded in the tunnel structure plate through all the installation holes, and is fastened;

[0038] Step B5, the pavement layer of the replaced anti-collision wall prefabricated segment is repaired.

[0039] The application has the following beneficial effects:

[0040] The application can reduce the cast-in-place maintenance time, optimize the construction operation environment, realize reliable connection of the prefabricated part and the tunnel structure plate, and is easier to replace.

[0041] The concept, specific structure and generated technical effects of the application will be further described below with reference to the drawings, so as to fully understand the purpose, features and effects of the application. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A transverse cross-sectional structure schematic view of an embodiment of the application is shown.

[0043] Figure 2 A schematic diagram of the structure of a rubber pad in one embodiment of the present invention is shown.

[0044] Figure 3 This diagram illustrates the structure of the joint formed after splicing two adjacent prefabricated sections of the crash barrier in one embodiment of the present invention.

[0045] Figure 4 This is a perspective structural diagram of the side of a prefabricated anti-collision wall segment facing away from the pavement layer in one embodiment of the present invention.

[0046] Figure 5 This diagram illustrates a three-dimensional structure of a prefabricated anti-collision wall segment according to an embodiment of the present invention. Detailed Implementation

[0047] Example: Figures 1 to 5 As shown, the tunnel uses a prefabricated, easily detachable crash barrier; it includes multiple prefabricated crash barrier segments 2 that are sequentially connected on the tunnel structure slab 1.

[0048] Each prefabricated segment 2 of the crash barrier has multiple inclined mounting holes 3 between its side facing away from the pavement layer and its bottom. A screw 5 is inserted into each mounting hole 3, and each screw 5 is fastened to a pre-embedded sleeve 4 embedded in the tunnel structure slab 1 to achieve fixation with the tunnel structure slab 1.

[0049] Rubber pads 7 are provided between every two adjacent prefabricated sections 2 of the crash barrier;

[0050] Each rubber pad 7 has a smaller external dimension than the end face of the corresponding prefabricated section 2 of the crash barrier;

[0051] At the joint formed after splicing two adjacent prefabricated sections 2 of the crash barrier, the portion located outside the corresponding rubber pad 7 is coated with polysulfide sealant 8 to seal the joint.

[0052] Each prefabricated section 2 of the crash barrier has two holes 11 on its bottom surface for forklift lifting during construction.

[0053] This invention employs a prefabrication and assembly process to reduce in-situ curing time and optimize the construction environment. The anti-collision wall is fixed by screws 5 and pre-embedded sleeves 4, enabling dry construction, which is environmentally friendly and safe. It not only reduces in-situ curing time and optimizes the construction environment, but also achieves a reliable connection between prefabricated components and tunnel structure slabs.

[0054] In some embodiments, each mounting hole 3 on the side of the corresponding precast section 2 of the crash barrier facing away from the pavement includes a hand hole 6 with an inner diameter larger than that of the corresponding mounting hole 3;

[0055] Each screw 5 has a nut in the portion located within the corresponding hand hole 6.

[0056] In some embodiments, the multiple mounting holes 3 of each prefabricated crash barrier segment 2 are staggered within the corresponding prefabricated crash barrier segment 2 according to two different distances from the corresponding embedded sleeve 4 to the pavement layer.

[0057] In some embodiments, each rubber pad 7 is a neoprene pad.

[0058] In some embodiments, each prefabricated segment 2 of the crash barrier is 4 meters long, and each side has a 5*5mm chamfer 9 at the edge position corresponding to the trapezoidal cross-section; the distance between any two adjacent mounting holes 3 is 0.5 meters to 0.75 meters.

[0059] In some embodiments, the tunnel structure slab 1 is either a cast-in-place structure slab or a precast structure slab.

[0060] In some embodiments, the fastening between each screw 5 and the corresponding pre-embedded sleeve 4 is either an insertion sleeve connection or a rotation tightening method;

[0061] Each embedded sleeve 4 is a plastic embedded sleeve.

[0062] In some embodiments, each hole 11 has a 5*5mm rounded corner at its edge.

[0063] In practical applications, rounded corners can prevent the edges of the corresponding holes 11 from cracking due to concentrated force.

[0064] The present invention also provides a method for installing an easily detachable prefabricated crash barrier for tunnels, comprising the following steps:

[0065] Step A1: Fabricate tunnel structure slab 1 and pre-embed all pre-embedded sleeves 4 in tunnel structure slab 1;

[0066] Step A2: Prefabricate all prefabricated sections 2 of the crash barrier, and set corresponding mounting holes 3 in each prefabricated section 2 of the crash barrier;

[0067] Step A3: Install a corresponding rubber pad 7 on the side of each precast section 2 of the crash barrier that is connected to another precast section 2 of the crash barrier;

[0068] Step A4: Use a forklift to lift each prefabricated segment 2 of the crash barrier and place it in place on the tunnel structure slab 1;

[0069] After the forklift is removed, insert the corresponding screws 5 into all the mounting holes 3 and tighten them with the corresponding pre-embedded sleeves 4 pre-embedded in the tunnel structure plate 1.

[0070] Step A5: Install a nut on the exposed end of each screw 5 from the side of the corresponding precast anti-collision wall segment 2 facing away from the pavement layer, and lock the corresponding screw 5 with the nut to fix the corresponding precast anti-collision wall segment 2 to the tunnel structure slab 1.

[0071] Step A6: Construction includes the paving layer of concrete layer 19 and asphalt layer 10.

[0072] The present invention also provides a method for replacing an easily detachable prefabricated crash barrier for tunnels, comprising the following steps:

[0073] Step B1: Loosen and remove each bolt 5 and corresponding nut of the prefabricated crash barrier segment 2 that needs to be replaced;

[0074] Step B2: Use a light-duty pick to loosen the part of the precast anti-collision wall segment 2 that is connected to the pavement layer on the side facing the pavement layer;

[0075] Step B3: Using the hole 11, lift the waste prefabricated section 2 of the crash barrier with a forklift and place it on the transport vehicle, waiting for subsequent off-site disposal.

[0076] Step B4: Use a forklift to lift and place the new prefabricated crash barrier segment 2 onto the tunnel structure slab 1.

[0077] After the forklift is removed, insert the corresponding screws 5 into all the mounting holes 3 and tighten them with the corresponding pre-embedded sleeves 4 pre-embedded in the tunnel structure plate 1.

[0078] Step B5: Repair the paving layer of the replaced precast crash barrier segment 2.

[0079] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A method for installing and replacing easily detachable prefabricated crash barriers for tunnels; comprising multiple prefabricated crash barrier segments (2) sequentially connected on a tunnel structure slab (1); characterized in that: Each of the prefabricated anti-collision wall segments (2) has multiple inclined mounting holes (3) between the side facing away from the pavement and the bottom. The screws (5) are inserted into each mounting hole (3) and each screw (5) is fastened to the pre-embedded sleeve (4) embedded in the tunnel structure plate (1) to achieve fixation with the tunnel structure plate (1). A rubber pad (7) is provided between each two adjacent prefabricated sections (2) of the crash barrier. Each of the rubber pads (7) has a smaller outer dimension than the end face of the corresponding prefabricated segment (2) of the crash barrier; At the joint formed after splicing two adjacent prefabricated sections (2) of the crash barrier, the portion located on the outside of the corresponding rubber pad (7) is sealed with polysulfide sealant (8); Each of the aforementioned prefabricated anti-collision wall segments (2) has two holes (11) on its bottom surface for forklift lifting construction. The mounting holes (3) of each of the prefabricated segments (2) of the crash barrier are staggered in the corresponding prefabricated segments (2) according to two different distances from the corresponding embedded sleeves (4) to the pavement layer; The installation steps are as follows: Step A1: Fabricate the tunnel structure plate (1) and pre-embed all the pre-embedded sleeves (4) in the tunnel structure plate (1). Step A2: Prefabricate all the prefabricated segments (2) of the crash barrier, and set the corresponding mounting holes (3) in each prefabricated segment (2); Step A3: Install the corresponding rubber pad (7) on the side where each of the prefabricated sections (2) of the crash barrier is connected to another prefabricated section (2) of the crash barrier. Step A4: Each of the prefabricated crash barrier segments (2) is lifted by a forklift and placed in place on the tunnel structure slab (1); After the forklift is removed, the corresponding screws (5) are inserted into all the mounting holes (3) and fastened to the corresponding embedded sleeves (4) embedded in the tunnel structure plate (1); Step A5: A nut is provided on the end of each screw (5) that is exposed from the side of the corresponding precast anti-collision wall segment (2) facing away from the pavement layer. The screw (5) is locked by the nut, so that the corresponding precast anti-collision wall segment (2) is fixed to the tunnel structure plate (1). Step A6: Construction includes the paving layer consisting of a concrete layer (19) and an asphalt layer (10); The replacement steps are as follows: Step B1: Loosen and remove each of the bolts (5) and corresponding nuts of the prefabricated crash barrier segment (2) that needs to be replaced; Step B2: Use a light-duty pick to loosen the part of the precast anti-collision wall segment (2) that is connected to the pavement layer on the side facing the pavement layer; Step B3: Using the holes (11), lift the waste prefabricated sections (2) of the crash barrier with a forklift and place them on the transport vehicle for later disposal. Step B4: Use a forklift to lift and place the new prefabricated crash barrier segment (2) into the tunnel structure slab (1); After the forklift is removed, the corresponding screws (5) are inserted into all the mounting holes (3) and fastened to the corresponding embedded sleeves (4) embedded in the tunnel structure plate (1); Step B5: Repair the paving layer of the prefabricated anti-collision wall segment (2) after replacement.

2. The method for installing and replacing the easily detachable prefabricated anti-collision wall for tunnels according to claim 1, characterized in that, Each of the mounting holes (3) located on the side of the corresponding precast section (2) of the crash barrier facing away from the pavement includes a hand hole (6) with an inner diameter larger than that of the corresponding mounting hole (3); Each of the screws (5) is provided with a nut in the portion located within the corresponding hand hole (6).

3. The method for installing and replacing the easily detachable prefabricated anti-collision wall for tunnels according to claim 1, characterized in that, Each of the rubber pads (7) is a neoprene pad.

4. The method for installing and replacing the easily detachable prefabricated anti-collision wall for tunnels according to claim 1, characterized in that, Each of the prefabricated anti-collision wall segments (2) is 4 meters long, and each side has a 5*5mm chamfer (9) at the edge position corresponding to the trapezoidal cross section; the distance between each pair of adjacent mounting holes (3) is 0.5 meters to 0.75 meters.

5. The method for installing and replacing the easily detachable prefabricated anti-collision wall for tunnels according to claim 1, characterized in that, The tunnel structure slabs (1) are all cast-in-place or precast structure slabs.

6. The method for installing and replacing the easily detachable prefabricated anti-collision wall for tunnels according to claim 1, characterized in that, Each of the screws (5) is fastened to the corresponding embedded sleeve (4) by either an insertion sleeve connection or a rotation tightening method. Each of the aforementioned embedded sleeves (4) is a plastic embedded sleeve.

7. The method for installing and replacing the easily detachable prefabricated anti-collision wall for tunnels according to claim 1, characterized in that, Each of the holes (11) has a 5*5mm rounded corner at its edge.

Images