Slidable inverted arch formwork and construction method thereof

Abstract

The invention discloses a slidable inverted arch formwork, comprising an intermediate formwork and side formworks located on both sides of the intermediate formwork, wherein the side formworks are provided with a first longitudinal track arranged along the depth direction of the inverted arch, and the intermediate formworks are provided with a telescopic frame capable of telescopic adjustment, and the telescopic frame can be reciprocated and slidably arranged on the first longitudinal track. A construction method of a slidable inverted arch formwork is also disclosed, comprising the following steps: S1: fixing the side formwork; S2: installing the intermediate formwork; S3: adjusting the position of the intermediate formwork; S4: pouring and sliding the intermediate formwork; S5: lifting the intermediate formwork and treating the surface of the intermediate inverted arch; and S6: overall movement. The slidable inverted arch formwork and the construction method thereof have the advantages of convenient construction, ability to reduce construction costs, ability to improve construction convenience and efficiency, and the like.

Description

Technical Field

[0001] The invention relates to tunnel construction equipment, in particular to a slidable inverted arch template and a construction method thereof. Background Art

[0002] With the continuous development of tunnel construction technology in my country in recent years, in order to effectively improve the stability and durability of the invert structure, a new understanding of the requirements for invert construction has been achieved. The formwork for invert construction has been optimized from a simple single-piece small formwork to a trestle-driven integral low side wall invert formwork, and then to a full-width invert formwork with a full invert section. The invert layer of the tunnel is constructed with a full-width invert formwork, which increases the formwork cost and further compresses the invert construction space. During pouring construction, the invert layer is below the formwork and can only be poured and vibrated through the working window, and cannot be fully vibrated. In actual construction applications, bubbles are easily formed on the surface of the final invert concrete. The layout of the full-width invert formwork cannot provide the original slurry finish and timely secondary cleaning of the surface of the invert layer. While the bubbles affect the appearance of the invert layer, they are also accompanied by certain safety risks. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a slidable inverted arch formwork and a construction method thereof which are easy to construct, can reduce construction costs, and can improve construction convenience and construction efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A slidable inverted arch formwork comprises a middle formwork and side formworks located on both sides of the middle formwork, wherein the side formworks are provided with a first longitudinal track arranged along the depth direction of the inverted arch, and the middle formwork is provided with a telescopic frame that can be telescopically adjusted, and the telescopic frame can be slidably arranged on the first longitudinal track so as to reciprocate along the first longitudinal track.

[0006] As a further improvement of the above technical solution:

[0007] A support frame is provided on the side template, and the first longitudinal track is fixed on the support frame.

[0008] The telescopic frame comprises a top frame and a telescopic mechanism, the bottom end of the telescopic mechanism is fixed on the middle template, the top frame is fixed on the top end of the telescopic mechanism, and the top frame is slidably arranged on the first longitudinal track.

[0009] The top frame is provided with a guide roller matched with the first longitudinal track.

[0010] The telescopic mechanism is a telescopic oil cylinder.

[0011] The side templates are longer than the middle template.

[0012] The side formwork is provided with a support rod for preventing the invert formwork from floating up.

[0013] A sealing gasket is provided at the contact point between the middle template and the side template.

[0014] A construction method of the above-mentioned slidable inverted arch formwork comprises the following steps:

[0015] S1: Side formwork fixing: fix two side formworks on both sides of the tunnel respectively;

[0016] S2: Middle template installation: Slidingly install the telescopic frame on the middle template on the first longitudinal track on the side template;

[0017] S3: Adjust the position of the middle formwork: slide the middle formwork along the first longitudinal track to the position to be poured, extend the telescopic frame, and lower the middle formwork to dock with the side formwork;

[0018] S4: pouring and sliding of the middle formwork: pouring concrete below the inverted arch formwork, sliding the middle formwork along the first longitudinal track, forming the inverted arch below the middle formwork, and forming and pouring the side formwork;

[0019] S5: lifting the middle formwork and treating the surface of the middle invert: lifting the middle formwork by the telescopic frame to separate the middle formwork from the middle invert, and treating the surface of the middle invert;

[0020] S6: Overall movement: The invert formwork is moved as a whole to the next construction station through the trestle trolley.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] The slidable inverted arch formwork of the present invention is divided into two side formworks and a middle formwork located between the two side formworks. A first longitudinal track is fixedly arranged on the side formworks. Telescopic frames are arranged on both sides of the middle formworks, which are respectively slidably arranged on the first longitudinal tracks on the two side formworks, so that the middle formworks can reciprocate along the first longitudinal tracks. When pouring the lower layer of concrete of the inverted arch, the middle formworks can be moved to make way, so that the construction is more convenient and the concrete can be vibrated and compacted in time, so that the construction quality is improved. After pouring the middle layer of concrete, the middle formworks are moved again to smooth and shape the accumulated concrete, and concrete can be poured under the formworks on both sides at the same time. The construction is very convenient and fast. Compared with the movement of the full-width inverted arch, only the middle formworks are moved, so that the construction quality of the inverted arch is ensured, it is easier to implement and has lower cost. In addition, the telescopic frames can lift the middle formworks. Specifically, the telescopic frames are extended to make the middle formworks descend and dock with the side formworks on both sides, and the telescopic frames are extended to make the middle formworks rise, so that the middle formworks are separated from the middle inverted arch, so that the surface of the middle inverted arch is processed, and the construction quality, construction convenience and construction efficiency are improved.

[0023] The construction method of the slidable inverted arch formwork of the present invention reduces the trouble of disassembling and re-erecting the formwork by sliding the middle formwork along the first longitudinal track to adjust to the position to be poured, thereby improving the convenience and efficiency of construction; and, the middle formwork is lifted by the telescopic frame to process the surface of the middle inverted arch, thereby improving the construction quality, construction convenience and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main structure of the slidable inverted arch formwork of the present invention during construction.

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0027] Figure 4 It is a side structural schematic diagram of the slidable inverted arch formwork of the present invention.

[0028] Figure 5 It is a schematic diagram of the main structure of the slidable inverted arch template of the present invention when the middle template is separated from the middle inverted arch.

[0029] Figure 6 It is a schematic diagram of the main structure of the slidable inverted arch template of the present invention when it moves as a whole.

[0030] The symbols in the figure represent:

[0031] 1. Middle formwork; 2. Side formwork; 21. Support frame; 22. Support rod; 3. First longitudinal track; 4. Telescopic frame; 41. Top frame; 42. Telescopic mechanism; 5. Guide roller; 6. Tunnel; 7. Inverted arch; 8. Trestle trolley; 9. Sealing pad. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figures 1 to 4 An embodiment of a slidable inverted arch formwork of the present invention is shown, which includes a middle formwork 1 and side formworks 2 located on both sides of the middle formwork 1, the side formworks 2 are provided with a first longitudinal track 3 arranged along the depth direction of the inverted arch 7, the middle formwork 1 is provided with a telescopic frame 4 that can be telescopically adjusted, and the telescopic frame 4 can be slidably arranged on the first longitudinal track 3 so as to move back and forth along the first longitudinal track 3.

[0034] The inverted arch formwork is divided into two side formworks 2 and a middle formwork 1 located between the two side formworks 2. A first longitudinal track 3 is fixedly arranged on the side formworks 2. Telescopic frames 4 are arranged on both sides of the middle formwork 1, which are respectively slidably arranged on the first longitudinal tracks 3 on the two side formworks 2, so that the middle formwork 1 can reciprocate along the first longitudinal tracks 3. The side formworks 2 and the middle formwork 1 form a contour surface required for tunnel construction. When pouring the lower layer of concrete of the inverted arch 7, the middle formwork 1 can be moved to make room, which makes construction more convenient and can timely vibrate and compact the concrete, thereby improving the construction quality. After pouring the middle layer of concrete, the middle formwork 1 is again The middle formwork 1 is moved to level and shape the accumulated concrete, and concrete can be poured under the formworks 2 on both sides at the same time. The construction is very convenient and fast. Compared with the movement of the entire inverted arch, only the middle formwork 1 is moved. While ensuring the construction quality of the inverted arch 7, it is easier to implement and has lower cost. In addition, the telescopic frame 4 can lift the middle formwork 1. Specifically, the telescopic frame 4 is extended to lower the middle formwork 1 and dock with the side formworks 2 on both sides. The telescopic frame 4 is extended to raise the middle formwork 1 to separate the middle formwork 1 from the poured middle inverted arch 7, thereby processing the surface of the middle inverted arch 7 and improving the construction quality, construction convenience and construction efficiency.

[0035] In this embodiment, Figure 1 As shown, a support frame 21 is provided on the side template 2, and the first longitudinal track 3 is fixed on the support frame 21. The side template 2 is fixed to the lower side of the support frame 21, and the structure is more stable. One side of the middle template 1 is slidably arranged on the first longitudinal track 3 on the side template 2 on the side through the telescopic frame 4 on the side, and the other side is slidably arranged on the first longitudinal track 3 on the side template 2 on the side through the telescopic frame 4 on the side, so that the middle template 1 can be smoothly raised and lowered.

[0036] In this embodiment, Figure 3 As shown, the telescopic frame 4 includes a top frame 41 and a telescopic mechanism 42, the bottom end of the telescopic mechanism 42 is fixed on the middle template 1, the top frame 41 is fixed on the top of the telescopic mechanism 42, and the top frame 41 is slidably arranged on the first longitudinal track 3. The top frame 41, the telescopic mechanism 42 and the middle template 1 are connected to form an integrally liftable structure, which is slidably arranged on the first longitudinal track 3, and can slide along the first longitudinal track 3 to adjust the mold position, and can also be lifted and lowered to realize mold erection and demoulding.

[0037] In this embodiment, Figure 1 and Figure 3 As shown, the top frame 41 is provided with guide rollers 5 that cooperate with the first longitudinal track 3. As a preferred technical solution, for example, the first longitudinal track 3 adopts an I-beam track, and the guide rollers 5 adopt a T-shaped structure. The first longitudinal track 3 and the guide rollers 5 cooperate on both sides of the middle template 1, so that the movement of the middle template 1 is more stable and smooth.

[0038] In this embodiment, the telescopic mechanism 42 is a telescopic cylinder.

[0039] In this embodiment, Figure 4 As shown, the side formwork 2 is longer than the middle formwork 1. Specifically, the length of the side formwork 2 in the longitudinal direction of the tunnel 6 is at least one time longer than the middle formwork 1, so that the middle formwork 1 can be constructed along the first longitudinal track 3 to form at least two sections of inverts 7.

[0040] In this embodiment, Figure 1 Shown, the side formwork 2 is provided with a support rod 22 for preventing the inverted arch formwork from floating up. Preventing the inverted arch formwork from floating up by the support rod 22 ensures the construction quality of the inverted arch 7.

[0041] In this embodiment, Figure 2 As shown, a sealing gasket 9 is provided at the contact point between the middle formwork 1 and the side formwork 2. The sealing gasket 9 fills the gap between the side formwork 2 and the middle formwork 1 to prevent the concrete slurry from overflowing. Figure 2 As shown, the sealing gasket 9 is fixed to the middle template 1 by bolts. In other embodiments, the sealing gasket 9 can also be fixed to the side template 2 by bolts.

[0042] Figure 1 , Figure 5 and Figure 6 An embodiment of a construction method of a slidable inverted arch formwork of the present invention is shown. The construction method of a slidable inverted arch formwork of the present invention comprises the following steps:

[0043] S1: Fixing the side formwork 2: Fixing two side formworks 2 on both sides of the tunnel 6 respectively;

[0044] S2: Installation of the middle template 1: Slidingly install the telescopic frame 4 on the middle template 1 on the first longitudinal track 3 on the side template 2;

[0045] S3: Adjusting the position of the middle formwork 1: sliding the middle formwork 1 along the first longitudinal track 3 to the position to be poured, extending the telescopic frame 4, and lowering the middle formwork 1 to dock with the side formwork 2;

[0046] S4: pouring and sliding of the middle formwork 1: pouring concrete below the inverted arch formwork, the middle formwork 1 slides along the first longitudinal track 3, the inverted arch below the middle formwork 1 is formed, and the side formwork 2 is formed and poured;

[0047] S5: Figure 5 As shown, the intermediate formwork 1 is lifted and the surface of the intermediate inverted arch 7 is treated: the intermediate formwork 1 is lifted by the telescopic frame 4, so that the intermediate formwork 1 is separated from the intermediate inverted arch 7, and the surface of the intermediate inverted arch 7 is treated; when the telescopic frame 4 is closed, the intermediate formwork can be lifted;

[0048] S6: Overall movement: The inverted arch formwork is moved as a whole to the next construction station by the trestle trolley 8. Figure 6As shown, the side formwork 2 is hoisted by the trestle trolley 8, so that the invert formwork is moved as a whole to the next construction station.

[0049] The construction method of the slidable inverted arch formwork is to slide the middle formwork 1 along the first longitudinal track 3 to adjust to the position to be poured, thereby reducing the trouble of disassembling and re-erecting the formwork and improving the convenience and efficiency of construction; and, the middle formwork 1 is lifted by the telescopic frame 4 to process the surface of the middle inverted arch 7, thereby improving the construction quality, construction convenience and construction efficiency.

[0050] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A slidable inverted arch formwork, characterized in that: The invention comprises a middle formwork (1) and side formworks (2) located on both sides of the middle formwork (1), wherein the side formworks (2) are provided with a first longitudinal track (3) arranged along the depth direction of the inverted arch (7), and the middle formwork (1) is provided with a telescopic frame (4) capable of telescopic adjustment, wherein the telescopic frame (4) is slidably arranged on the first longitudinal track (3) so as to reciprocate along the first longitudinal track (3); the telescopic frame (4) comprises a top frame (41) and a telescopic mechanism (42), wherein the telescopic mechanism (42) is a telescopic oil cylinder; the side formworks (2) and the middle formwork (1) form the contour surface required for tunnel construction. When pouring the lower layer of concrete of the inverted arch (7), the middle formwork (1) can be moved to make way. After pouring the middle layer of concrete, the middle formwork (1) is moved again to smooth and shape the accumulated concrete. The telescopic frame (4) is extended to make the middle formwork (1) descend and dock with the side formworks (2) on both sides. The telescopic frame (4) is extended to make the middle formwork (1) rise, so that the middle formwork (1) is separated from the poured middle inverted arch (7).

2. The slidable inverted arch formwork according to claim 1, characterized in that: A support frame (21) is provided on the side template (2), and the first longitudinal rail (3) is fixed on the support frame (21).

3. The slidable inverted arch formwork according to claim 1, characterized in that: The bottom end of the telescopic mechanism (42) is fixed on the middle template (1), the top frame (41) is fixed on the top end of the telescopic mechanism (42), and the top frame (41) is slidably mounted on the first longitudinal track (3).

4. The slidable inverted arch formwork according to claim 3, characterized in that: The top frame (41) is provided with a guide roller (5) that cooperates with the first longitudinal track (3).

5. The slidable inverted arch formwork according to claim 1, characterized in that: The side template (2) is longer than the middle template (1).

6. The slidable inverted arch formwork according to claim 1, characterized in that: The side formwork (2) is provided with a support rod (22) for preventing the invert formwork from floating up.

7. The slidable inverted arch formwork according to claim 1, characterized in that: A sealing gasket (9) is provided at the contact point between the middle template (1) and the side template (2).

8. A construction method for a slidable inverted arch formwork according to any one of claims 1 to 7, characterized in that: The steps include: S1: fixing the side formwork (2): fixing two side formworks (2) on both sides of the tunnel (6); S2: installing the middle template (1): slidingly installing the telescopic frame (4) on the middle template (1) on the first longitudinal track (3) on the side template (2); S3: adjusting the position of the middle formwork (1): sliding the middle formwork (1) along the first longitudinal track (3) to the position to be poured, extending the telescopic frame (4), and lowering the middle formwork (1) to dock with the side formwork (2); S4: pouring and sliding of the middle formwork (1): pouring concrete below the inverted arch formwork, the middle formwork (1) sliding along the first longitudinal track (3), forming the inverted arch below the middle formwork (1), and forming and pouring the side formwork (2); S5: lifting the intermediate formwork (1) and treating the surface of the intermediate inverted arch (7): lifting the intermediate formwork (1) by means of the telescopic frame (4) so ​​that the intermediate formwork (1) is separated from the intermediate inverted arch (7), and treating the surface of the intermediate inverted arch (7); S6: Overall movement: The invert formwork is moved as a whole to the next construction station by means of the trestle trolley (8).

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