Full-circle template capable of being quickly disassembled and assembled for tunnel lining

Abstract

The utility model discloses a tunnel lining full-circle template capable of being quickly disassembled and assembled, which comprises a plurality of standard arc-shaped templates, pouring and vibrating arc-shaped templates are adjacently spliced with the standard arc-shaped templates, and a top arch pouring arc-shaped template is arranged at a circumferential top arch position. The one-way demolding arc-shaped template and the two-way demolding arc-shaped template are distributed at the demolding position of the right upper part of the top end area of the template system in an adjacent arrangement manner; an arc-shaped framework, a supporting cross beam and an inclined support combined supporting system is adopted in the formwork inner side structure, the arc-shaped framework and the supporting cross beam are independently connected through bolts, and the supporting cross beam is hinged to the supporting cross beam through a loose joint hinge lug to form an annular supporting frame. On the premise of guaranteeing the construction quality, the problems of low lining construction efficiency and overhigh labor cost of the short and circular tunnel are effectively solved, and the template dismounting time can be shortened by more than one third compared with a needle beam trolley and is shortened by more than one fourth compared with an all-round scaffold matched with a small steel template.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circular tunnel concrete secondary lining, in particular to a tunnel lining quick dismounting full circle formwork. BACKGROUND

[0002] The lining of the upper flat standard section of the tail water tunnel of a certain pumped storage power station is about 21.0m long in single hole and has an inner diameter of 2.6m after lining. The four parallelly arranged tail water tunnels have a center spacing of 19.6m, and the inlet and outlet structure of the tail water tunnel immediately adjacent to the downstream side has been constructed in advance, resulting in a large cross interference between the tail water tunnel lining and the inlet and outlet construction. If the needle beam trolley process is used for the tail water tunnel lining, the trolley dismounting of a single tunnel will occupy about 25 days, and the construction period and cost will be significantly increased. If the full scaffold is used in cooperation with the small steel formwork process, the construction quality is difficult to guarantee, and the dismounting efficiency is low. Therefore, a circular tunnel lining process needs to be designed to facilitate manual quick dismounting, effectively fill the gap between the above processes in terms of technology, quality and economy, and provide an efficient, reliable and economical construction scheme for the secondary lining of the short circular tunnel to solve the above problems. SUMMARY

[0003] The utility model provides tunnel lining quick dismounting full circle formwork, can solve the problem that short circular tunnel lining gives full play to the assembly advantage of dismounting formwork under the condition of guaranteeing quality without large equipment cooperation, can make formwork dismounting time more than one third shorter than needle beam trolley, more than one fourth shorter than full scaffold cooperation small steel formwork.

[0004] To realize the above technical effect, the utility model adopts the technical scheme that:

[0005] The tunnel lining quick dismounting full circle formwork includes a plurality of standard arc-shaped formworks, pouring and vibrating arc-shaped formworks are connected with the standard arc-shaped formworks in an adjacent mode, the top arch pouring arc-shaped formwork is arranged at the top arch position of the circle and is provided with an arch top grouting pipe, the one-way demolding arc-shaped formwork and the two-way demolding arc-shaped formwork are arranged in an adjacent arrangement mode at the demolding position of the right upper part of the top arch of the circle, the arc-shaped skeletons are arranged in a split mode along the circumferential direction, at least two of the arc-shaped skeletons are wedge-shaped arc-shaped skeletons, the arc-shaped skeletons are connected through bolts, and the arc-shaped skeletons are fixed to the inner sides of the standard arc-shaped formworks, the pouring and vibrating arc-shaped formworks, the top arch pouring arc-shaped formwork, the one-way demolding arc-shaped formwork and the two-way demolding arc-shaped formwork, the support cross beams are hinged with the diagonal support double-head screw rods through loose joint hinge ears, and the support cross beams form a ring-shaped support frame.

[0006] Preferably, the bottom and the two sides of the standard arc-shaped formwork are uniformly arranged with pouring and vibrating windows with a size of 30cm*30cm, and the pouring and vibrating arc-shaped formwork is provided with the pouring and vibrating windows.

[0007] Preferably, the middle part of the support beam is hinged with the telescopic diagonal bracing double-end screw rod, and the telescopic diagonal bracing double-end screw rod is fixed to the inner side of the arc-shaped framework through a triangular diagonal bracing structure, and is used for adjusting the roundness of the formwork system and enhancing the support stability.

[0008] Preferably, the arc-shaped framework and the support beam are longitudinally provided with stable steel pipes which are penetrated and connected at intervals of 75 cm in the longitudinal direction and are fixed through buckles to form an integral reinforcing system.

[0009] Preferably, the arc-shaped framework, the support beam and the diagonal bracing double-end screw rod form a support system, and the longitudinal interval of the support system can be adjusted to adapt to the thickness of the secondary lining of concrete.

[0010] Preferably, the one-way stripping arc-shaped formwork, the two-way stripping arc-shaped formwork and the wedge-shaped arc-shaped framework are matched with the diagonal bracing double-end screw rod, and the formwork system is quickly disassembled by rotating and removing the diagonal bracing double-end screw rod.

[0011] Further, the single-piece weight of the five kinds of arc-shaped formworks is less than or equal to 50 kg, and the single-piece weight of the support beam, the arc-shaped framework, the diagonal bracing double-end screw rod and the stable steel pipe is less than or equal to 60 kg, so that the operation can be realized without mechanical cooperation.

[0012] Preferably, the telescopic diagonal bracing double-end screw rod is connected with the support beam through a hinged lug to form a triangular support structure, and the roundness of the formwork system is controlled by adjusting the length of the double-end screw rod.

[0013] Further, the stable steel pipe is of a specification of Φ48mm*3.2mm, and the longitudinal interval is 75 cm, which is used for longitudinally connecting the arc-shaped framework and the support beam to enhance the overall stability.

[0014] Further, the system is suitable for a circular tunnel with an inner diameter of 2.6 m, and the arc-shaped formwork in the circumferential direction is composed of 27 standard arc-shaped formworks, 2 one-way stripping formworks and 1 two-way stripping formwork, and the support system includes 6 arc-shaped frameworks, 3 support beams and 3 diagonal bracing double-end screw rods.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The quick disassembly and assembly type steel formwork system for the secondary lining of a circular tunnel is simple and practical, convenient to construct and good in stability. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a structural schematic view of the utility model;

[0018] Fig. 2 is an expanded view of the utility model. Detailed Implementation

[0019] Example 1:

[0020] like Figs. 1-2 As shown, the tunnel lining quick-assembly and disassembly full-circular formwork includes multiple standard arc-shaped formworks 1, and casting and vibration arc-shaped formworks 2 are spliced ​​adjacent to the standard arc-shaped formworks 1; the arch casting arc-shaped formwork 3 is set at the circumferential arch position and is equipped with an arch grouting pipe; the unidirectional demolding arc-shaped formwork 4 and the bidirectional demolding arc-shaped formwork 5 are arranged adjacently at the upper right demolding position of the top area of ​​the formwork system; the arc-shaped skeleton 6 is set in sections along the circumferential direction, of which at least two are wedge-shaped arc-shaped skeletons. The arc-shaped skeletons 6 are fixed to the inside of the standard arc-shaped formwork 1, the casting and vibration arc-shaped formwork 2, the arch casting arc-shaped formwork 3, the unidirectional demolding arc-shaped formwork 4, and the bidirectional demolding arc-shaped formwork 5 by bolts; the supporting beam 7 is hinged to the diagonal bracing double-ended threaded rod 8 through a movable hinge lug to form a ring support frame. The formwork is arranged with stabilizing steel pipes 9 along the longitudinal direction, and the arc-shaped skeleton 6 and the supporting beam 7 are fastened together by standard scaffolding fasteners.

[0021] Preferably, the standard arc-shaped template 1 has 30cm×30cm pouring and vibration windows evenly arranged on the bottom and both sides, and the pouring and vibration arc-shaped template 2 is provided with pouring and vibration windows; the pouring and vibration windows are distributed in a plum blossom shape.

[0022] Preferably, the middle part of the supporting beam 7 is hinged to the telescopic diagonal brace double-headed screw rod 8. The telescopic diagonal brace double-headed screw rod 8 is fixed to the inner side of the arc-shaped frame 6 through a triangular diagonal brace structure, which is used to adjust the roundness of the template system and enhance the support stability.

[0023] Preferably, the arc-shaped frame 6 and the supporting crossbeam 7 are longitudinally provided with stabilizing steel pipes 9, which are connected longitudinally at 75cm intervals and fixed by fasteners to form an overall reinforcement system.

[0024] Preferably, the arc-shaped frame 6, the supporting beam 7, and the diagonal double-headed threaded rod 8 form a support system, the longitudinal spacing of which can be adjusted to adapt to the thickness of the secondary concrete lining.

[0025] Preferably, the unidirectional demolding arc template 4, the bidirectional demolding arc template 5, the wedge-shaped arc frame 6, and the inclined double-headed screw rod 8 are combined to achieve quick assembly and disassembly of the template system by rotating and removing the inclined double-headed screw rod 8.

[0026] Furthermore, the weight of each of the five types of arc-shaped templates is ≤50kg, and the weight of each of the supporting beam 7, arc-shaped frame 6, diagonal double-headed screw rod 8, and stabilizing steel pipe 9 is ≤60kg, enabling operation without mechanical assistance.

[0027] Preferably, the telescopic inclined brace double-end screw rod 8 is connected with the support beam 7 through a hinged lug to form a triangular support structure, and the roundness of the formwork system is controlled by adjusting the length of the screw rod.

[0028] Further, the stable steel pipe 9 is of Φ48mm*3.2mm specification, and the longitudinal spacing is 75cm, which is used to connect the arc-shaped framework 6 and the support beam 7 to enhance the overall stability.

[0029] Further, the system is suitable for a circular tunnel with an inner diameter of 2.6m, and the arc-shaped formwork in the circumferential direction is composed of 27 standard arc-shaped formworks 1, 2 one-way stripping formworks 4, and 1 two-way stripping formwork 5, and the support system includes 6 arc-shaped frameworks 6, 3 support beams 7, and 3 inclined brace double-end screw rods 8.

[0030] Further, the non-working face is sprayed with a layer of deep blue anti-rust paint.

[0031] Further, the arc-shaped framework 6 and the support beam 7 are both made of I14a# I-shaped steel.

[0032] Embodiment two:

[0033] The working principle of the utility model is as follows:

[0034] After the installation of the circular tunnel lining steel bar, the positioning rib and the concrete protection pad block is completed, the arc-shaped formworks 1, 2 in the range of 120 degrees at the bottom are assembled on the concrete protection layer pad block and the positioning steel bar.

[0035] Then the bottom I14a# arc-shaped framework 6 and the I14a# support beam 7 are assembled in sequence.

[0036] Then the arc-shaped formworks 1, 2 on both sides and the arc-shaped framework 6 are assembled in sequence.

[0037] Then the arc-shaped formworks 1, 2, 3, 4, 5 and the arc-shaped framework 6 of the top arch are assembled in sequence.

[0038] Then the support beams 7 on both sides and the triangularly fixed telescopic inclined brace double-end screw rod 8 are assembled in sequence, and the telescopic inclined brace double-end screw rod 8 is adjusted to make the arc-shaped formworks 1, 2, 3, 4, 5 and the arc-shaped framework 6 standard circular.

[0039] Finally, the stable frame pipe 9 is connected on the scaffold support points reserved on the arc-shaped framework 6 and the support beam 7 by using a fastener, and inclined steel pipes are added at appropriate positions to increase the overall stability of the formwork system.

[0040] After the concrete pouring is completed and the strength reaches 5.0MPa, when the formwork is removed, the triangularly fixed inclined brace double-end screw rod 8 is first rotated and removed.

[0041] Then the arc-shaped frameworks 6 on both sides and the top arch are removed in sequence.

[0042] Then the top arch and both sides of the double stripping arc-shaped template 5, single stripping arc-shaped template 4, top arch pouring arc-shaped template 3, pouring and vibrating arc-shaped template 2 and standard arc-shaped template 1 are removed in turn;

[0043] Then the support beam 7 in the range of 120 degrees at the bottom and the arc-shaped framework 6 are removed in turn;

[0044] Finally, the standard arc-shaped template 1 and the pouring and vibrating arc-shaped template 2 in the range of 120 degrees at the bottom are removed.

Claims

1. A full-round formwork for rapid assembly and disassembly of a tunnel lining, characterized in that, The template system comprises a plurality of standard arc-shaped templates (1), a pouring and vibrating arc-shaped template (2) and a top arch pouring arc-shaped template (3) arranged at the top arch position of the template system, and a one-way stripping arc-shaped template (4) and a two-way stripping arc-shaped template (5) arranged at the stripping position of the upper part of the top end region of the template system. The arc-shaped skeletons (6) are fixed to the inner sides of the standard arc-shaped templates (1), the pouring and vibrating arc-shaped template (2), the top arch pouring arc-shaped template (3), the one-way stripping arc-shaped template (4) and the two-way stripping arc-shaped template (5) through bolt connection.

2. The quick dismounting full-circle formwork for tunnel lining according to claim 1, characterized in that: The bottom and two sides of the standard arc-shaped template (1) are uniformly provided with pouring and vibrating windows, and the pouring and vibrating arc-shaped template (2) is provided with pouring and vibrating windows.

3. The quick-assembly and disassembly full-circle formwork for tunnel lining according to claim 1, characterized in that: The middle part of the support beam (7) is hingedly connected with the telescopic inclined support double-end screw rod (8), and the telescopic inclined support double-end screw rod (8) is fixed to the inner side of the support beam (7) through a triangular inclined support structure, so as to adjust the roundness of the template system and enhance the support stability.

4. The quick-assembly and disassembly full-circle formwork for tunnel lining according to claim 1, characterized in that: The stable steel pipes (9) are arranged between the arc-shaped skeletons (6) and the support beams (7), and the stable steel pipes (9) are connected in series at fixed intervals in the longitudinal direction and are fixed through standard scaffold fasteners, so as to form an overall reinforcing system.

5. The quick-assembly and disassembly full-circle formwork for tunnel lining according to claim 1, characterized in that: The arc-shaped skeletons (6), the support beams (7) and the inclined support double-end screw rod (8) form a support system, and the longitudinal spacing of the support system can be adjusted to adapt to the thickness of the secondary lining of concrete.

6. The quick-assembly and disassembly full-circle formwork for tunnel lining according to claim 1, characterized in that: The one-way stripping arc-shaped template (4), the two-way stripping arc-shaped template (5), the wedge-shaped arc-shaped skeleton (6) and the inclined support double-end screw rod (8) are matched, and the template system is quickly disassembled by rotating and removing the inclined support double-end screw rod (8).

7. The quick-assembly and disassembly full-circle formwork for tunnel lining according to claim 3, characterized in that: The telescopic inclined support double-end screw rod (8) is connected with the support beam (7) through a loose hinge ear to form a triangular support structure, and the roundness of the template system is controlled by adjusting the length of the screw rod.

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