Folding type formwork device for filling tunnel inverted arch with concrete

Abstract

The invention provides a folding type formwork device for filling a tunnel inverted arch with concrete, and belongs to the technical field of inverted arch construction equipment.The device comprises two longitudinal main beams arranged in parallel, two folding formwork units, a cross beam, an end plugging formwork and a traveling unit, each folding formwork unit is arranged on the corresponding longitudinal main beam, and each folding formwork unit is arranged on the corresponding longitudinal main beam; the two sets of folding formwork units are symmetrically arranged, each set of folding formwork unit comprises a plurality of sub-formworks which are sequentially hinged, and a driving mechanism is arranged on the side, back on to a pouring face, of each sub-formwork and used for driving the sub-formworks to form at least two set shapes so as to be used for pouring an inverted arch body and a supporting bottom plate; the cross beam is arranged at one ends of the longitudinal main beams and is connected with the two longitudinal main beams; the end plugging templates are arranged on the inner sides of the cross beams; the traveling unit is arranged on the longitudinal main beam and used for driving the longitudinal main beam to move in the construction propelling direction; the technical problems that existing inverted arch construction is large in labor intensity, low in efficiency and long in construction period are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of invert construction equipment, and in particular relates to a foldable formwork device used for filling concrete in a tunnel invert. Background Art

[0002] The tunnel invert is an arch structure, which is located at the bottom of the tunnel lining structure and is in the shape of an inverted arch, like an inverted bowl. This arch structure can better transfer the pressure from the top to the sides and bottom, and use the mechanical properties of the arch to disperse the pressure. For example, in a mountain tunnel, due to the high pressure of the mountain, the arch structure of the invert can effectively convert the vertical pressure into horizontal thrust and disperse it into the surrounding rock and soil.

[0003] The tunnel invert filling concrete construction involves two parts of the structure, such as Figure 1 As shown in the figure, they are respectively the inverted arch body 1 located at the bottom of the tunnel and the supporting bottom plate 2 located at the top of the inverted arch body 1. The existing construction method for these two parts of the structure is to set up two sets of templates respectively. When the inverted arch body is constructed, the template specially constructed for the inverted arch is used for pouring. After the pouring of the inverted arch body is completed, the inverted arch template is removed and the bottom plate template is installed, and then the bottom plate is poured. This construction method requires disassembling and assembling two sets of templates back and forth, which has high labor intensity, low construction efficiency, and a long construction period.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The object of the present invention is to provide a foldable formwork device for filling concrete in a tunnel invert, so as to solve the technical problems of high labor intensity, low efficiency and long construction period in the existing invert construction.

[0006] In order to achieve the above-mentioned object, the foldable formwork device for filling concrete in a tunnel invert of the present invention provides the following technical solutions:

[0007] A foldable formwork device for filling concrete in a tunnel invert, comprising:

[0008] Two longitudinal main beams arranged in parallel;

[0009] Two sets of folding template units, each set of the folding template units is respectively arranged on a longitudinal main beam, the two sets of folding template units are symmetrically arranged, each set of folding template units includes a plurality of sub-templates hinged in sequence, and a driving mechanism is arranged on the side of the sub-templates facing away from the casting surface, which is used to drive the plurality of sub-block templates to form at least two set shapes for casting the inverted arch body and the supporting bottom plate respectively;

[0010] A cross beam, which is arranged at one end of the longitudinal main beam and connects the two longitudinal main beams;

[0011] An end blocking template, which is arranged on the inner side of the cross beam and is used to cooperate with two sets of folding template units to facilitate pouring;

[0012] A travel unit is arranged on the longitudinal main beam and is used to drive the longitudinal main beam (3) to move along the construction advancement direction.

[0013] As a further optimized technical solution, the multiple sub-templates include a first sub-template, a second sub-template, a third sub-template and a fourth sub-template; the first sub-template is fixedly arranged on the outer side of the longitudinal main beam, and the bottom end of the first sub-template is bent and extended toward the inner side of the longitudinal main beam; one end of the second sub-template is hinged to the bottom end of the first sub-template, and the other end is hinged to the third sub-template; the end of the third sub-template away from the second sub-template is hinged to the fourth sub-template.

[0014] As a further optimized technical solution, the driving mechanism is a linear telescopic driving structure, which is used to drive the multiple sub-templates to form a set shape.

[0015] As a further optimized technical solution, the linear telescopic drive structure includes a first telescopic cylinder, a second telescopic cylinder and a third telescopic cylinder; one end of the first telescopic cylinder is hinged to the longitudinal main beam, and the other end is hinged to the second sub-template, one end of the second telescopic cylinder is hinged to the second sub-template, and the other end is hinged to the third sub-template, one end of the third telescopic cylinder is hinged to the third sub-template, and the other end is hinged to the fourth sub-template.

[0016] As a further optimized technical solution, the travel unit includes:

[0017] A connecting component, the connecting component is fixedly arranged on the crossbeam and used for connecting to an external pulling driving source;

[0018] An extension component, the extension component is arranged at an end of the longitudinal main beam away from the cross beam;

[0019] The walking wheel is hinged below the extension component, and the bottom of the walking wheel is used to contact the completed supporting base plate.

[0020] As a further optimized technical solution, a driving unit for driving the running wheels to rotate is also provided on the extension component.

[0021] As a further optimized technical solution, the foldable formwork device for filling concrete in tunnel inverts also includes a front telescopic support component and a rear telescopic support component, wherein the front telescopic support component is arranged below the cross beam, and the rear telescopic support component is arranged below the extension component.

[0022] As a further optimized technical solution, clamping units for clamping the waterstop are arranged at intervals on the outer side of the beam.

[0023] As a further optimized technical solution, the clamping unit includes two clamping plates arranged opposite to each other, and the top ends of the two clamping plates are hinged to facilitate clamping of the waterstop.

[0024] As a further optimized technical solution, a limiting unit for limiting the position of steel bars is arranged on the outer side of the longitudinal main beam. The limiting unit includes a longitudinally arranged fixing plate, on which slots with openings facing outward and used for clamping the steel bars are arranged at intervals.

[0025] Beneficial effects: The foldable formwork device for filling concrete in tunnel inverts of the present invention can complete the pouring construction of the invert body and the supporting bottom plate in sequence by adjusting the shape of the folding formwork unit without disassembling the formwork, avoiding the tedious process of repeatedly disassembling and assembling the formwork in the traditional construction method, greatly shortening the construction period, and significantly improving the construction efficiency; in addition, by using the technical solution of the present invention, the labor intensity of the construction personnel is effectively reduced due to the reduction of the number of disassembly and assembly of the formwork, and the construction safety risks that may be caused by the disassembly and assembly of the formwork are also reduced; finally, the unique formwork structure design of the present invention and the coordinated work of various components ensure the sealing and stability of the pouring mold cavity, which is conducive to the uniform pouring and vibration of concrete, thereby ensuring the construction quality of the invert and the supporting bottom plate. At the same time, the setting of the clamping unit and the limit unit further improves the waterproof performance and overall strength of the tunnel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0027] Figure 1 This is a structural diagram of the tunnel invert filling construction;

[0028] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0029] Figure 3 for Figure 2 The enlarged schematic diagram of part A in the middle;

[0030] Figure 4 A side view schematic diagram of an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the construction of an embodiment of the present invention;

[0032] Figure 6 FIG. 1 is a schematic diagram of a driving unit according to an embodiment of the present invention.

[0033] In the figure: 1. arch body; 2. supporting bottom plate; 3. longitudinal main beam; 4. folding template unit; 401. first sub-template; 402. second sub-template; 403. third sub-template; 404. fourth sub-template; 5. crossbeam; 6. end blocking template; 7. driving mechanism; 701. first telescopic cylinder; 702. second telescopic cylinder; 703. third telescopic cylinder; 8. connecting part; 9. extension part; 10. walking wheel; 11. driving unit; 12. front telescopic support part; 13. rear telescopic support part; 14. clamping unit; 1401. clamping plate; 15. limiting unit; 1501. fixing plate; 1502. slot. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0035] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0037] The shapes and sizes of the components in the drawings do not reflect the actual proportions of the products, and are only intended to illustrate the contents of the present invention.

[0038] The present invention provides a foldable formwork device for filling concrete in a tunnel invert. By arranging a foldable formwork unit on a longitudinal main beam and adjusting the shape of the foldable formwork unit, the pouring construction of the invert body and the supporting bottom plate are completed in sequence, thereby avoiding the tedious process of repeatedly disassembling and assembling the formwork in the traditional construction method, greatly shortening the construction period, and significantly improving the construction efficiency.

[0039] Example 1

[0040] like Figure 2-6As shown, the folding formwork device for filling concrete in a tunnel invert comprises a longitudinal main beam 3, a folding formwork unit 4, a cross beam 5 and a travel unit.

[0041] There are two longitudinal main beams 3, which are parallel to each other and symmetrically arranged, providing the main supporting structure and bearing foundation for the entire device, ensuring the stability of the device and the overall structural strength during the construction process.

[0042] The folding template unit 4 includes two sets, and the two sets of folding template units 4 are respectively arranged on a longitudinal main beam 3, and the two are arranged symmetrically. Each set of folding template units 4 includes multiple sub-templates hinged in sequence, and a driving mechanism 7 is arranged on the side of the sub-template facing away from the casting surface, which is used to drive the multiple sub-templates to form at least two set shapes for casting the inverted arch body 1 and the supporting bottom plate 2. Specifically, the sub-template includes a first sub-template 401, a second sub-template 402, a third sub-template 403 and a fourth sub-template 404. The first sub-template 401 is fixed to the outside of the longitudinal main beam 3, and its bottom end is bent and extended to the inside of the longitudinal main beam 3; one end of the second sub-template 402 is hinged to the bottom end of the first sub-template 401, and the other end is hinged to the third sub-template 403; the end of the third sub-template 403 away from the second sub-template 402 is hinged to the fourth sub-template 404. The driving mechanism 7 adopts a linear telescopic driving structure, which is composed of a first telescopic oil cylinder 701, a second telescopic oil cylinder 702 and a third telescopic oil cylinder 703. One end of the first telescopic oil cylinder 701 is hinged to the longitudinal main beam 3, and the other end is hinged to the second sub-template 402; one end of the second telescopic oil cylinder 702 is hinged to the second sub-template 402, and the other end is hinged to the third sub-template 403; one end of the third telescopic oil cylinder 703 is hinged to the third sub-template 403, and the other end is hinged to the fourth sub-template 404. Through the telescopic movement of each telescopic oil cylinder, the relative position and angle of the sub-template are accurately controlled to realize the combination of templates of different shapes.

[0043] Please refer to Figure 5 When pouring the inverted arch body 1, the first telescopic oil cylinder 701 pushes the second sub-template 402 to rotate downward. At the same time, the second telescopic oil cylinder 702 pushes the third sub-template 403 to maintain a large angle with the second sub-template 402. The third telescopic oil cylinder 703 pushes the fourth sub-template 404 to rotate around the third sub-template 403, so that the fourth sub-template 404 maintains a large angle with the third sub-template 403. In this way, the four sub-templates can form an arc shape that matches the top surface of the inverted arch body 1 (such as Figure 5The dotted line portion shows the situation). At this time, the inverted arch body 1 can be formed by pouring concrete in the space formed between the two folding template units 4. After the inverted arch body 1 is poured, the first telescopic cylinder 701 pulls the second sub-template 402 upward until the second sub-template 402 is in a horizontal state. At the same time, the second telescopic cylinder 702 and the third telescopic cylinder 703 adjust the third sub-template 403 and the fourth sub-template 404 so that the third sub-template 403 is used to form the side of the supporting base plate 2. At this time, the folding template unit 4 forms a shape that matches the supporting base plate 2 and is used to pour the supporting base plate 2 (such as Figure 5 At the same time, the two fourth sub-templates 404 can be adjusted to form a "trumpet" shape with a larger top and a smaller bottom, which plays a guiding role in the concrete pouring process, making it easier to pour concrete on the top of the invert body 1, thereby making it easier to pour concrete.

[0044] The cross beam 5 is installed at one end of the longitudinal main beam 3 and is used to connect the two longitudinal main beams 3. Specifically, the cross beam 5 is firmly connected to the longitudinal main beam 3 by high-strength bolts or welding, so as to form a stable frame structure together with the longitudinal main beam 3. That is, the cross beam 5 plays a role in transverse reinforcement and stabilization of the structure, and at the same time provides a support platform for the installation of other components.

[0045] The end blocking template 6 is arranged on the inner side of the cross beam 5 and cooperates with the two sets of folding template units 4. Specifically, during the pouring process, the end blocking template 6 is arranged at the front end of the longitudinal main beam 3. After the device completes pouring of a section of structure, it moves forward for a distance to continue pouring, thereby forming a continuous inverted arch structure. Therefore, during pouring, the folding template units 4 on both sides, the end blocking template 6 and the front end face of the completed pouring structure jointly form a complete pouring mold cavity, ensuring that the concrete will not leak during the pouring process, thereby ensuring the pouring quality.

[0046] The travel unit is located on the longitudinal main beam 3 and is responsible for driving the longitudinal main beam 3 to move along the construction advancement direction.

[0047] In this embodiment, the travel unit includes a connecting component 8 , an extending component 9 and a travel wheel 10 .

[0048] The connecting member 8 is fixedly arranged on the cross beam 5 for connecting an external pulling driving source, such as a traction device. In the present invention, the connecting member 8 is a connecting ear, and the traction device is an inverted arch trestle. After completing a section of construction, the inverted arch trestle pulls the device of the present invention forward for a distance through the connecting member 8 and then continues the construction.

[0049] The extension member 9 is arranged at one end of the longitudinal main beam 3 away from the cross beam 5; the running wheel 10 is hinged below the extension member 9, and the bottom is used to contact the completed supporting bottom plate 2. Thus, the difficulty of pulling the device of the inverted arch trestle can be reduced.

[0050] Furthermore, the extension part 9 is also provided with a driving unit 11 for driving the running wheel 10 to rotate. Figure 6 As shown, the driving unit 11 in this embodiment has a motor and a reducer, and the reducer drives the walking wheel 10 to rotate through a transmission chain, so that the device can be further pushed to move from the rear end, and cooperate with the inverted arch trestle to make the movement of the device more flexible.

[0051] In addition, the foldable formwork device for filling concrete in the tunnel invert also includes a front telescopic support component 12 and a rear telescopic support component 13. The front telescopic support component 12 is arranged under the cross beam 5, and the rear telescopic support component 13 is arranged under the extension component 9. During the construction process, it can be extended or retracted as needed to assist the support device and improve the stability of the device at different construction stages.

[0052] Specifically, the front telescopic support component 12 includes a lifting cylinder and a supporting screw rod, and the rear telescopic support component 13 uses a lifting cylinder or a supporting screw rod. During the pouring construction process, the front telescopic support component 12 and the rear telescopic support component 13 are used together to support the device in a stable construction state. At this time, the running wheel 10 is suspended. After the pouring is completed, the front telescopic support component 12 and the rear telescopic support component 13 are retracted upward for a distance, the running wheel 10 is lowered, and the travel unit drives the device to move forward for a distance.

[0053] Furthermore, if Figure 3 As shown, a clamping unit 14 for clamping the water stop is arranged at intervals on the outside of the cross beam 5. The clamping unit 14 includes two clamping plates 1401 arranged opposite to each other. The top ends of the two clamping plates 1401 are hinged to facilitate opening and closing operations, and can firmly clamp the water stop to prevent concrete leakage and ensure the waterproof effect of the tunnel. A torsion spring can be installed at the hinged position, so that the two clamping plates 1401 maintain a relatively clamped state, so as to facilitate clamping the water stop installed on both ends of the invert body 1 during the pouring process.

[0054] Furthermore, a limiting unit 15 for limiting the position of the steel bars is arranged on the outer side of the longitudinal main beam 3. The limiting unit 15 includes a longitudinally arranged fixing plate 1501. The fixing plate 1501 is provided with slots 1502 with openings facing outwards and used for clamping the steel bars at intervals. During the concrete pouring process, the limiting unit 15 can effectively fix the position of the steel bars to avoid displacement of the steel bars caused by vibration during the pouring process, so as to ensure the strength of the inverted arch structure.

[0055] The working principle of the present invention is as follows:

[0056] When the inverted arch body 1 needs to be cast, the driving mechanism 7 is started. The first telescopic oil cylinder 701 is actuated to push the second sub-template 402 to rotate around the hinge point between the second sub-template 402 and the first sub-template 401, so that the second sub-template 402 is tilted outward; at the same time, the second telescopic oil cylinder 702 and the third telescopic oil cylinder 703 work together to adjust the position and angle of the third sub-template 403 and the fourth sub-template 404, so that the multiple sub-templates are combined to form a shape suitable for casting the inverted arch body 1, ensuring that the casting mold cavity is consistent with the design contour of the inverted arch body 1, and then the inverted arch body 1 is cast into the mold cavity.

[0057] After the casting of the inverted arch body 1 is completed, the driving mechanism 7 is activated again. The first telescopic cylinder 701 is contracted to pull the second sub-form 402 to rotate inward; the second telescopic cylinder 702 and the third telescopic cylinder 703 are adjusted accordingly to make the multiple sub-forms form a shape suitable for the casting of the supporting bottom plate 2, and prepare for the construction of the supporting bottom plate 2.

[0058] During the entire construction process, according to the construction progress and actual needs, the external traction equipment is connected through the connecting component 8, and the driving unit (including the walking wheel 10 and the driving unit 11) is used to drive the device to move along the construction advancement direction. At the same time, the telescopic operation of the front telescopic support component 12 and the rear telescopic support component 13 is coordinated to ensure that the device always maintains a stable working state.

[0059] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A foldable formwork device for filling concrete in tunnel inverts, characterized in that: include: Two longitudinal main beams (3) arranged in parallel; Two sets of folding template units (4), each set of the folding template units (4) is respectively arranged on a longitudinal main beam (3), the two sets of folding template units (4) are symmetrically arranged, each set of the folding template units (4) comprises a plurality of sub-templates hinged in sequence, a driving mechanism (7) is arranged on the side of the sub-templates facing away from the casting surface, and is used to drive the plurality of sub-templates to form at least two set shapes for respectively casting the inverted arch body (1) and the supporting bottom plate (2); A cross beam (5), the cross beam (5) being arranged at one end of the longitudinal main beam (3) and connecting the two longitudinal main beams (3); An end blocking template (6), wherein the end blocking template (6) is arranged on the inner side of the cross beam (5) and is used to cooperate with the two sets of folding template units (4) to facilitate pouring; A travel unit is arranged on the longitudinal main beam (3) and is used to drive the longitudinal main beam (3) to move along the construction advancement direction.

2. The foldable formwork device for tunnel invert filling concrete according to claim 1, characterized in that: The plurality of sub-templates include a first sub-template (401), a second sub-template (402), a third sub-template (403) and a fourth sub-template (404); the first sub-template (401) is fixedly arranged on the outer side of the longitudinal main beam (3), the bottom end of the first sub-template (401) is bent and extended toward the inner side of the longitudinal main beam (3), one end of the second sub-template (402) is hinged to the bottom end of the first sub-template (401), and the other end is hinged to the third sub-template (403), and one end of the third sub-template (403) away from the second sub-template (402) is hinged to the fourth sub-template (404).

3. The foldable formwork device for filling concrete in tunnel inverts according to claim 2, characterized in that: The driving mechanism (7) is a linear telescopic driving structure, which is used to drive the plurality of sub-templates to form a set shape.

4. The foldable formwork device for tunnel invert filling concrete according to claim 3, characterized in that: The linear telescopic drive structure comprises a first telescopic oil cylinder (701), a second telescopic oil cylinder (702) and a third telescopic oil cylinder (703); one end of the first telescopic oil cylinder (701) is hinged to the longitudinal main beam (3), and the other end is hinged to the second sub-template (402); one end of the second telescopic oil cylinder (702) is hinged to the second sub-template (402), and the other end is hinged to the third sub-template (403); one end of the third telescopic oil cylinder (703) is hinged to the third sub-template (403), and the other end is hinged to the fourth sub-template (404).

5. The foldable formwork device for tunnel invert filling concrete according to claim 1, characterized in that: The travel unit comprises: A connecting component (8), wherein the connecting component (8) is fixedly arranged on the crossbeam (5) and is used for connecting to an external pulling driving source; An extension component (9), wherein the extension component (9) is arranged at an end of the longitudinal main beam (3) away from the cross beam (5); A running wheel (10), wherein the running wheel (10) is hinged below the extension component (9), and the bottom of the running wheel (10) is used to contact the completed supporting base plate (2).

6. The foldable formwork device for tunnel invert filling concrete according to claim 5, characterized in that: The extension component (9) is also provided with a driving unit (11) for driving the running wheel (10) to rotate.

7. The foldable formwork device for tunnel invert filling concrete according to claim 6, characterized in that: The foldable formwork device for filling concrete in a tunnel invert further comprises a front telescopic support component (12) and a rear telescopic support component (13), wherein the front telescopic support component (12) is arranged below the crossbeam (5), and the rear telescopic support component (13) is arranged below the extension component (9).

8. The foldable formwork device for tunnel invert filling concrete according to any one of claims 1 to 7, characterized in that: Clamping units (14) for clamping the water stop strip are arranged at intervals on the outside of the cross beam (5).

9. The foldable formwork device for tunnel invert filling concrete according to claim 8, characterized in that: The clamping unit (14) comprises two clamping plates (1401) arranged opposite to each other, and the top ends of the two clamping plates (1401) are hinged to facilitate clamping the water stop strip.

10. The foldable formwork device for tunnel invert filling concrete according to any one of claims 1 to 7, characterized in that: A limiting unit (15) for limiting the position of steel bars is arranged outside the longitudinal main beam (3), and the limiting unit (15) comprises a longitudinally arranged fixing plate (1501), and fixing grooves (1502) with openings facing outwards and used for fixing steel bars are arranged at intervals on the fixing plate (1501).

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