Inverted arch web water stop template for tunnel construction

Abstract

The utility model provides an inverted arch belly water stop mould for tunnel construction, which comprises a main template placed at the bottom of a tunnel, a template connecting mechanism is inserted on one side of the main template, a threaded bolt is in threaded connection with the template connecting mechanism, the main template and the template connecting mechanism are fixed through the threaded bolt, and the main template and the template connecting mechanism are fixed through the threaded bolt. The formwork can be quickly disassembled and folded when not needed, the occupied space is smaller, the storage space can be saved, the carrying and rearrangement time of the formwork is shortened, and therefore the construction progress is accelerated. Rotating side plates are hinged to the sides, away from each other, of the main formwork and the formwork connecting mechanism, the rotating side plates on the two sides are folded inwards in the demolding process, and through the design, friction between the two sides and a tunnel can be avoided in the demolding process. The two sets of main formworks are connected through the fixing mechanisms in threaded connection and are both installed above the formworks, and the construction steps of installing and dismantling the formworks are simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction, in particular to an inverted arch soffit water-stopping template for tunnel construction. Background Art

[0002] In recent years, my country's tunnel construction technology has been continuously developing; the inverted arch is an inverted arch structure set at the bottom of the tunnel to improve the stress conditions of the upper support structure of the tunnel, and is an important part of the tunnel structure. The construction quality and speed of the inverted arch will directly affect the safety and construction period of the entire tunnel construction. The inverted arch belly formwork commonly used in the market is a full-width integral arc steel formwork. Because it is manufactured as a whole, it requires a large space to store, and it is heavy, which increases the transportation cost. In addition, once it is damaged or needs to be replaced, it may take more time and resources to repair or replace it. In addition, its size is large, and it takes a long time to disassemble and assemble the formwork. At the same time, it occupies a large space in the tunnel, affecting the construction of other types of work in the tunnel, thereby reducing the construction efficiency; at the same time, the existing inverted arch formwork is usually provided with an intermediate formwork, which makes the concrete surface after pouring in the middle of the inverted arch smooth, and requires secondary pouring. It cannot ensure that the concrete fully fills all spaces during the pouring process, which reduces the uniformity and overall quality of the concrete structure, and is inconvenient to remove the formwork in the subsequent time, increasing the dependence on complex mechanical equipment.

[0003] The inverted arch water-stopping formwork for tunnel construction with announcement number CN112228109A includes: a middle formwork and side formworks located on both sides of the middle formwork, the bottom of the side formwork is hinged with a flip formwork connected to the middle formwork, a flip mechanism for flipping the flip formwork is provided between the side formwork and the flip formwork, the flip formwork is provided with a longitudinal track arranged along the depth direction of the inverted arch, the middle formwork can reciprocate along the longitudinal track and be slidably arranged on the longitudinal track, the inverted arch formwork and the construction method thereof have the advantages of convenient construction, ability to reduce construction cost, ability to improve construction convenience and construction rate, etc.

[0004] However, when installing the above device, due to the long side formwork and flip formwork and the wide middle formwork, the disadvantages of large size and weight of a single formwork still exist. Due to its integrity, it requires a large space to store, and its heavy weight increases the transportation cost. Once damaged or replaced, it may take more time and resources to repair or replace. At the same time, the device sets the middle formwork, and the surface of the concrete poured in the middle of the invert is smooth, which is not conducive to its bonding with the secondary poured concrete in the subsequent process, affecting the pouring quality. In addition, this design is not convenient for disassembling the device during demoulding, and more mechanical equipment is required. Therefore, it is necessary to provide an inverted arch belly water-stop formwork for tunnel construction to solve the above problems. Utility Model Content

[0005] The technical content of the utility model is to provide an inverted arch soffit water-stopping template for tunnel construction.

[0006] In order to solve the above problems, the utility model provides an arch belly water-stop template for tunnel construction, including: a main template placed at the bottom of the tunnel, a template connecting mechanism is inserted on one side of the main template, and a threaded bolt is threadedly connected to the template connecting mechanism, the main template and the template connecting mechanism are fixed by the threaded bolt, and the main template and the template connecting mechanism are hinged with a rotating side plate on the side away from each other, and the two groups of the main templates are connected by a threaded fixing mechanism.

[0007] As a further solution of the present invention, the template connection mechanism includes a connection block and a secondary template, and the connection block is a rectangular structure with a width smaller than that of the secondary template.

[0008] As a further solution of the utility model, the connecting block and the auxiliary template are composed of a convex structure, and a groove matching the connecting block is opened on the main template, so that the template can be quickly disassembled and folded when not needed, reducing the time of carrying and rearranging the template.

[0009] As a further solution of the utility model, the four groups of threaded bolts are evenly connected to the connecting block, and matching threaded grooves are opened on the front side of the main template.

[0010] As a further solution of the present invention, the side edge of the rotating side plate has a convex structure with a certain curvature, and the protruding portion is hinged on the side of the main template away from the template connection mechanism, reducing the surface area in contact with the tunnel wall, thereby reducing the possibility of friction.

[0011] As a further solution of the utility model, the main template and the template connecting mechanism are a group of templates placed at the bottom of the tunnel, and another group of templates are placed opposite to the other side of the tunnel, and the two groups of templates are fixed by a fixing mechanism and installed above the template, which simplifies the template installation and removal construction steps so that workers can operate more easily.

[0012] As a further solution of the utility model, the fixing mechanism includes a nut, a pad and a fixing bolt, the pad is a square structure, and the connecting block has the advantages of dispersing pressure and reducing device wear.

[0013] As a further solution of the utility model, grooves matching the pad are provided at symmetrical positions on the main template and the template connecting mechanism, and the pad is connected to the grooves on the main template and the template connecting mechanism through fixing bolts. The grooves fix the connecting block to ensure that the connecting block will not be displaced or fall off during installation.

[0014] In summary, the utility model includes at least one of the following beneficial technical effects:

[0015] First, the utility model records an arch soffit water-stopping formwork for tunnel construction, which records that the main formwork and the formwork connecting mechanism are fixed by threaded bolts, and the rotating side panels are hinged at the top. The threaded connection of the threaded bolts allows the formwork to be quickly disassembled and folded when not needed, reducing the time for carrying and rearranging the formwork, thereby speeding up the construction progress. This is for tunnel construction that requires frequent movement of the formwork to adapt to different construction stages, and the rotating side panels can be folded up, which is convenient for folding the rotating side panels on both sides inward during demolding. This design can avoid friction between the two sides and the tunnel during demolding. Since the two sides are folded inward, the surface area in contact with the tunnel wall is reduced, thereby reducing the possibility of friction, protecting the formwork and tunnel structure, and ensuring construction quality, and reducing the labor intensity of workers during the demolding process, thereby improving construction efficiency.

[0016] Second, the utility model records an arch soffit water-stopping formwork for tunnel construction, which records that two sets of formworks are connected by a fixing mechanism, and the fixing mechanisms are installed above the formworks, which simplifies the steps of installing and removing the formworks, so that workers can operate more easily and reduce the dependence on complex mechanical equipment. Since the formworks are fixed from above, it can ensure that concrete fully fills all spaces during the pouring process, thereby improving the uniformity and overall quality of the concrete structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the inverted arch soffit water-stopping template for tunnel construction of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the inverted arch soffit water-stopping template for tunnel construction of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure decomposition of the template connection mechanism of the inverted arch soffit water-stop template for tunnel construction of the utility model;

[0021] Figure 4 It is a schematic diagram of the main template and fixed structure of the inverted arch soffit water-stop template for tunnel construction of the utility model;

[0022] Figure 5 It is a schematic diagram of the structural decomposition of the fixing mechanism of the inverted arch soffit water-stopping template for tunnel construction according to the utility model.

[0023] Figure numerals: 1. tunnel; 2. main formwork; 3. formwork connecting mechanism; 31. connecting block; 32. auxiliary formwork; 4. threaded bolt; 5. rotating side plate; 6. fixing mechanism; 61. nut; 62. pad; 63. fixing bolt. DETAILED DESCRIPTION

[0024] Please refer to Figure 1-Figure 5 The inverted arch soffit water-stopping formwork for tunnel construction comprises: a main formwork 2 placed at the bottom of a tunnel 1, a formwork connection mechanism 3 is inserted on one side of the main formwork 2, and a threaded bolt 4 is threadedly connected to the formwork connection mechanism 3, the main formwork 2 and the formwork connection mechanism 3 are fixed by the threaded bolt 4, and a rotating side plate 5 is hinged on the side of the main formwork 2 and the formwork connection mechanism 3 that are away from each other, and the two groups of main formworks 2 are connected by a threaded fixing mechanism 6.

[0025] Preferably, the template connecting mechanism 3 includes a connecting block 31 and a secondary template 32, the connecting block 31 is a rectangular structure with a width smaller than the secondary template 32, the connecting block 31 and the secondary template 32 form a convex structure, and a groove matching the connecting block 31 is opened on the main template 2, four groups of threaded bolts 4 are evenly connected to the connecting block 31, and a matching threaded groove is opened on the front side of the main template 2. During installation, the main template 2 is placed first, and then the connecting block 31 of the template connecting mechanism 3 is inserted into the groove of the main template 2, and the four groups of threaded bolts 4 are respectively threadedly connected to the threaded grooves on the main template 2 for fixation, so that the main template 2 and the template connecting mechanism 3 are fixed, and the threaded connection of the threaded bolts 4 allows the template to be quickly disassembled and folded when not needed, reducing the time for transporting and rearranging the template, thereby speeding up the construction progress.

[0026] Preferably, the side edge of the rotating side panel 5 has a convex structure with a certain curvature, and the protruding portion is hinged on the side of the main template 2 away from the template connecting mechanism 3. When installing the main template 2 and the template connecting mechanism 3, the rotating side panels 5 on both sides can be folded inward first, and then opened outward to contact the tunnel 1 after the template is installed. It is convenient to fold the rotating side panels 5 on both sides inward during demolding. This design can avoid friction between the two sides and the tunnel during demolding. Since the two sides are folded inward, the surface area in contact with the inner wall of the tunnel 1 is reduced, thereby reducing the possibility of friction, protecting the template and tunnel structure, and ensuring the construction quality, and reducing the labor intensity of workers during the demolding process, thereby improving construction efficiency.

[0027] Preferably, the main formwork 2 and the formwork connection mechanism 3 are a set of formworks placed at the bottom of the tunnel 1, and another set of formworks are placed opposite to the other side of the tunnel 1, and the two sets of formworks are fixed by a fixing mechanism 6, the fixing mechanism 6 includes a nut 61, a pad 62 and a fixing bolt 63, the pad 62 is a square structure, the main formwork 2 and the formwork connection mechanism 3 are symmetrically provided with grooves that match the pad 62, and the pad 62 is connected to the grooves provided on the main formwork 2 and the formwork connection mechanism 3 through the fixing bolt 63. When constructing the tunnel 1, it is necessary to place two sets of formworks opposite to each other at a certain distance, and place the pad 62 is sleeved on the fixing bolt 63, and the fixing bolt 63 is used to pass through the two sets of main formworks 2 and the formwork connecting mechanism 3 respectively, and the pad 62 is sleeved on the fixing bolt 63 on the other side, and the nut 61 is threadedly connected to the fixing bolt 63 to fix the two sets of formworks. Since the formwork is fixed from above, it can ensure that the concrete fully fills all the spaces during the pouring process, thereby improving the uniformity and overall quality of the concrete structure, and at the same time simplifying the steps of installing and removing the formwork. The formwork can be more easily removed during demoulding, so that workers can operate more easily, while reducing the dependence on complex mechanical equipment.

[0028] The working principle of the inverted arch soffit water-stopping template for tunnel construction provided by the utility model is as follows:

[0029] Clean the debris and soil on the bottom and side walls of Tunnel 1 to ensure that the formwork can fit tightly, check the formwork to ensure that it is consistent with the design, remove rust and plane the surface, and finally apply a release agent and store it for future use.

[0030] Lay out and mark the mileage of the invert end, spray red paint on the initial support surface, lay annular back-sticking rubber waterstop, and install the template according to the construction edge line that has been hung. After placing the main template 2, insert the connecting block 31 of the template connecting mechanism 3 into the groove of the main template 2, and thread the four groups of threaded bolts 4 into the threaded grooves on the main template 2 for fixing, so that the main template 2 and the template connecting mechanism 3 are fixed, and install the template on the other side according to the above steps. When installing the main template 2 and the template connecting mechanism 3, the rotating side panels 5 on both sides can be folded inward first, and then opened outward to contact the tunnel 1 after the template installation is completed.

[0031] After the installation is completed, use the pad 62 to be sleeved on the fixing bolt 63, and use the fixing bolt 63 to pass through the two sets of main formworks 2 and the formwork connecting mechanism 3 respectively, and put the pad 62 on the fixing bolt 63 on the other side, and thread the nut 61 on the fixing bolt 63 to fix the two sets of formworks and ensure the stability and firmness of the formworks. After installation, check and adjust to ensure that the formworks are installed correctly, positioned accurately, and there are no problems such as leakage of slurry and water.

[0032] Start pouring from the middle where there is no belly formwork until the bottom of both sides. Use concrete with appropriate slump and slow down the pouring speed appropriately to prevent the concrete in the formwork from bubbling out.

[0033] After the concrete pouring is completed, demoulding is carried out in a timely manner, the nuts 61 and fixing bolts 63 above the template are removed, the threaded bolts 4 connecting the main template 2 and the template connecting mechanism 3 are turned out, and the rotating side panels 5 on both sides are folded inward and removed, and the removed templates are cleaned and stacked for next use.

[0034] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. Water-stop formwork for inverted arch for tunnel construction, including: A main template (2) placed at the bottom of a tunnel (1), characterized in that: a template connection mechanism (3) is inserted into one side of the main template (2), and a threaded bolt (4) is threadedly connected to the template connection mechanism (3), the main template (2) and the template connection mechanism (3) are fixed by the threaded bolt (4), the main template (2) and the template connection mechanism (3) are hinged with a rotating side plate (5) on the side away from each other, and the two groups of the main templates (2) are connected by a threaded fixing mechanism (6); The template connection mechanism (3) comprises a connection block (31), wherein the connection block (31) is inserted into the main template (2); The fixing mechanism (6) comprises a fixing bolt (63), wherein the fixing bolt (63) is threadedly connected to the main template (2).

2. The inverted arch soffit waterproof template for tunnel construction according to claim 1, characterized in that: The template connection mechanism (3) comprises a connection block (31) and a secondary template (32); the connection block (31) is a rectangular parallelepiped structure with a width smaller than that of the secondary template (32).

3. The inverted arch soffit waterproof template for tunnel construction according to claim 2, characterized in that: The connecting block (31) and the auxiliary template (32) form a convex structure, and a groove matching the connecting block (31) is provided on the main template (2).

4. The inverted arch soffit waterproof template for tunnel construction according to claim 1, characterized in that: The four groups of threaded bolts (4) are evenly connected to the connecting block (31), and matching threaded grooves are provided on the front side of the main template (2).

5. The inverted arch soffit waterproof template for tunnel construction according to claim 1, characterized in that: The side edge of the rotating side plate (5) has a convex structure with a certain curvature, and the convex portion is hinged to the side of the main template (2) away from the template connection mechanism (3).

6. The inverted arch soffit waterproof template for tunnel construction according to claim 1, characterized in that: The main template (2) and the template connection mechanism (3) are a group of templates placed at the bottom of the tunnel (1), and another group of templates is placed opposite to the other side of the tunnel (1), and the two groups of templates are fixed by a fixing mechanism (6).

7. The inverted arch soffit waterproof template for tunnel construction according to claim 1, characterized in that: The fixing mechanism (6) comprises a nut (61), a pad (62) and a fixing bolt (63), and the pad (62) is a square structure.

8. The inverted arch soffit waterproof template for tunnel construction according to claim 7, characterized in that: The main template (2) and the template connecting mechanism (3) are both provided with grooves matching with the pad (62) at symmetrical positions, and the pad (62) is connected to the grooves provided on the main template (2) and the template connecting mechanism (3) via fixing bolts (63).

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