Formwork trolley for tunnel widening section

Abstract

The utility model discloses a tunnel widening section formwork trolley. The tunnel widening section formwork trolley comprises a plurality of sets of portal stand columns, portal cross beams and walking mechanisms. The bottom ends of the portal stand columns are connected with the top ends of the first lower longitudinal beams. A second lower longitudinal beam is arranged below the first lower longitudinal beam; a plurality of foundation jacks are mounted at the bottom end of the second lower longitudinal beam; a plurality of heightening supports are detachably mounted between the first lower longitudinal beam and the second lower longitudinal beam through bolts; the side walls of the two sets of portal stand columns located at the two ends are both connected with mounting bases. A piston rod of the hydraulic cylinder is connected with the top end of the guide column; the lower end of the guide column sequentially penetrates through the first lower longitudinal beam and the second lower longitudinal beam and is connected with the top end of the walking mechanism. The trolley has the advantages that the overall stability of the trolley is good, the deformation operation of the trolley is simple, the labor intensity can be effectively reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel formwork trolley technology, and in particular to a widened section formwork trolley. Background Technology

[0002] In my country, highway tunnels are generally equipped with emergency parking lanes, designated for temporary parking and fire lanes, i.e., widened sections, as per regulations. Widening sections require the use of large-sized formwork trolleys for construction. Currently, after completing one section, most components of the existing widening section formwork trolleys need to be disassembled before they can cross the standard tunnel section, move to the next widening section, and then be reassembled. This disassembly and reassembly process takes about twenty days, resulting in low efficiency, high labor intensity, and significant operational difficulties. While widening section trolleys with partial disassembly capabilities are available on the market, reducing the number of disassembled parts and labor intensity to some extent, the following problems still exist: some widening section trolleys have only one lower longitudinal beam, and this beam is too high off the ground, leading to poor trolley stability and posing a serious safety hazard. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a widened section template trolley with good overall stability and simple operation of trolley deformation, which can effectively reduce labor intensity and improve work efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is a widened section template trolley, including several sets of gantry columns, gantry beams, and a traveling mechanism; the bottom end of the gantry columns is connected to the top end of the first lower longitudinal beam; a second lower longitudinal beam is arranged below the first lower longitudinal beam; several foundation jacks are installed at the bottom end of the second lower longitudinal beam; several heightening supports are detachably installed between the first and second lower longitudinal beams by bolts; mounting seats are connected to the side walls of the two sets of gantry columns at both ends; one end of the hydraulic cylinder is connected to the mounting seat, and its piston rod is connected to the top end of the guide column; the lower end of the guide column passes through the first and second lower longitudinal beams in sequence and is connected to the top end of the traveling mechanism.

[0005] Furthermore, the number of the heightening supports is equal to the number of the gantry columns; the heightening supports are located directly below the gantry columns.

[0006] Furthermore, each set of gantry columns consists of two columns, one on the left and one on the right, and four hydraulic cylinders are installed on the two sets of gantry columns at the front and rear ends, respectively.

[0007] Furthermore, the gantry columns on the same side are connected by two upper and lower longitudinal beams; and the gantry crossbeams are connected by several longitudinal beams.

[0008] Furthermore, a first scissor bracket is also installed between two adjacent gantry columns on the same side.

[0009] Furthermore, a U-shaped upper gantry is installed on the outer side of each of the gantry columns; a lower gantry is detachably installed at the lower end of the upper gantry by bolts.

[0010] Furthermore, a supporting inclined plate is detachably installed between the bottom end of the lower gantry and the bottom end of the upper gantry; several threaded rod jacks are installed between the upper and lower gantry and the side template; a side template hydraulic cylinder is also installed between the upper gantry and the side template; the tops and outer walls of several upper gantry on the same side are connected by longitudinal beams; the outer walls of several lower gantry on the same side are connected by longitudinal beams.

[0011] Furthermore, triangular reinforcing plates can be detachably installed at the two inner corners of the upper gantry, and between the top of the lower gantry and the bottom of the upper gantry.

[0012] Furthermore, a second scissor bracket is installed between two adjacent upper gantry frames on the same side.

[0013] Furthermore, a reinforcing screw is installed between the bottom of the lower gantry and the second lower longitudinal beam.

[0014] The beneficial effects of this utility model are:

[0015] This utility model features two lower longitudinal beams, with a detachable heightening support installed between the first and second lower longitudinal beams. This increases the overall stability of the trolley during operation. Furthermore, when the trolley needs to be moved, the heightening support is removed, and the hydraulic cylinder is retracted, causing the first lower longitudinal beam to move downwards and deform, thus lowering the trolley's height and allowing it to pass through standard tunnel sections. Compared to traditional widened-section trolleys, the deformation operation is simpler, effectively reducing labor intensity. The entire process—removing a few components, traversing a standard tunnel section, and restoring the removed components—takes only three to five days, significantly improving work efficiency. Attached Figure Description

[0016] Figure 1 This is a front view of the overall structure of the embodiment;

[0017] Figure 2 This is a side view of a partial structure of an embodiment.

[0018] In the diagram, 1-gantry column, 2-first lower longitudinal beam, 3-mounting seat, 4-hydraulic cylinder, 5-guide column, 6-second lower longitudinal beam, 7-foundation jack, 8-heightening support, 9-traveling mechanism, 10-guide rail, 11-upper gantry, 12-lower gantry, 13-triangular reinforcing plate, 14-supporting inclined plate, 15-longitudinal beam, 16-side mold cylinder, 17-reinforcing screw, 18-gantry crossbeam, 19-first scissor frame. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] A type of formwork trolley for tunnel widening sections, such as Figure 1-2 As shown, the system includes several sets of gantry columns 1, gantry beams 18, and a traveling mechanism 9. The bottom end of the gantry column 1 is connected to the top end of the first lower longitudinal beam 2. A second lower longitudinal beam 6 is provided below the first lower longitudinal beam 2. Several foundation jacks 7 are installed at the bottom end of the second lower longitudinal beam 6. Several extension supports 8 are detachably installed between the first lower longitudinal beam 2 and the second lower longitudinal beam 6 via bolts. Mounting seats 3 are connected to the side walls of the two sets of gantry columns 1 at both ends. One end of the hydraulic cylinder 4 is connected to the mounting seat 3, and its piston rod is connected to the top end of the guide column 5. The lower end of the guide column 5 passes through the first lower longitudinal beam 2 and the second lower longitudinal beam 6 in sequence, and is connected to the top end of the traveling mechanism 9. The guide column 5 and the extension supports 8 are staggered and are not connected to each other.

[0021] The aforementioned tunnel widening section formwork trolley is equipped with two lower longitudinal beams, and a heightening support 8 is detachably installed between the first lower longitudinal beam 2 and the second lower longitudinal beam 6. On the one hand, this can increase the overall stability of the trolley during work transitions; on the other hand, when the trolley needs to be moved, the heightening support 8 is removed and the hydraulic cylinder 4 is controlled to retract, causing the first lower longitudinal beam 2 to move downward and deform, thereby reducing the height of the trolley and allowing it to pass through the standard section of the tunnel.

[0022] Specifically, the number of heightened supports 8 is equal to the number of gantry columns 1; the heightened supports 8 are located directly below the gantry columns 1.

[0023] Specifically, each set of gantry columns 1 consists of two columns on the left and two on the right, and four hydraulic cylinders 4 are installed on the two sets of gantry columns 1 at the front and rear ends respectively.

[0024] Specifically, the gantry columns 1 on the same side are connected by two upper and lower longitudinal beams 15; and several gantry crossbeams 18 are connected by several longitudinal beams 15.

[0025] Specifically, in order to improve the stability and load-bearing capacity of the trolley, a first scissor frame 19 is also installed between two adjacent gantry columns 1 on the same side.

[0026] Specifically, each gantry column 1 has a U-shaped upper gantry 11 installed on its outer side; the lower end of the upper gantry 11 is detachably installed with a lower gantry 12 by bolts.

[0027] Specifically, a support inclined plate 14 is detachably installed between the bottom end of the lower gantry 12 and the bottom end of the upper gantry 11; several threaded rod jacks are installed between the upper gantry 11 and the lower gantry 12 and the side template; a side template oil cylinder 16 is also installed between the upper gantry 11 and the side template; the tops and outer walls of several upper gantry 11 on the same side are connected by longitudinal beams 15; the outer walls of several lower gantry 12 on the same side are connected by longitudinal beams 15. Figure 2 The upper gantry 11, lower gantry 12, and related structures are not shown in the drawing.

[0028] Traditional widened section trolleys lack side masts, resulting in excessively long lead screw jacks used for connecting to the side formwork. This leads to insufficient lead screw strength and excessive weight, increasing the workload for construction workers. The side mast designed in this application reduces the length and weight of the lead screw jacks, thereby lowering the workload for construction workers.

[0029] Specifically, triangular reinforcing plates 13 can be detachably installed at the two inner corners of the upper gantry 11, and between the top of the lower gantry 12 and the bottom of the upper gantry 11.

[0030] Specifically, a second scissor frame is also installed between two adjacent upper gantry frames 11 on the same side. Figure 2 The second scissor bracket is not shown in the drawing.

[0031] Specifically, a reinforcing screw 17 is installed between the bottom of the lower gantry 12 and the second lower longitudinal beam 6. The reinforcing screw 17 can specifically improve the deformation resistance of the lower gantry 12.

[0032] The working principle of this utility model:

[0033] By setting up a first lower longitudinal beam 2 and a second lower longitudinal beam 6, and detachably installing a heightening support 8 between the first lower longitudinal beam 2 and the second lower longitudinal beam 6, the overall stability of the trolley can be increased during work transitions. On the other hand, when the trolley needs to be moved, the heightening support 8 can be removed and the hydraulic cylinder 4 can be controlled to retract, causing the first lower longitudinal beam 2 to move downward and deform, thereby reducing the height of the trolley and allowing it to pass through standard tunnel sections.

[0034] The specific deformation process is as follows:

[0035] S1. Remove the lower side formwork and remove the lower side frame 12;

[0036] S2. Remove the nuts installed on the heightening support 8 to release the lock between the heightening support 8 and the first lower longitudinal beam 2 and the second lower longitudinal beam 6. Then, slightly shorten the length of the foundation jack 7 so that the upper end of the heightening support 8 does not contact the lower end of the first lower longitudinal beam 2. Remove the heightening support 8.

[0037] S3. Continue to pull the base jack 7 upwards, gradually reducing its length, and the second lower longitudinal beam 6 gradually descends until it contacts the top of the traveling mechanism 9;

[0038] S4. Continue to pull the base jack 7 upwards, gradually reducing its length, so that the base jack 7 is disengaged from the guide rail 10.

[0039] S5. Control the hydraulic cylinder 4 to retract, causing the gantry column 1 to descend, which in turn moves the first lower longitudinal beam 2 downwards until it contacts the second lower longitudinal beam 6. By reasonably designing and increasing the height of the support 8, the height of the gantry column 1 is eventually lowered to a height that allows passage through the standard section.

[0040] During operation, you can also follow the steps S1, S2, S5, S3, and S4.

[0041] Compared to traditional widening section trolleys, the trolley deformation operation in this application is relatively simple, which can effectively reduce labor intensity. The entire process of dismantling components, traversing standard section tunnels, and restoring dismantled components only takes three to five days, effectively improving work efficiency.

[0042] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A formwork trolley for widening tunnel sections, comprising several sets of gantry columns (1), gantry beams (18), and a traveling mechanism (9); characterized in that: The bottom end of the gantry column (1) is connected to the top end of the first lower longitudinal beam (2); a second lower longitudinal beam (6) is provided below the first lower longitudinal beam (2); several foundation jacks (7) are installed at the bottom end of the second lower longitudinal beam (6); several heightening supports (8) are detachably installed between the first lower longitudinal beam (2) and the second lower longitudinal beam (6) by bolts; the side walls of the two sets of gantry columns (1) at both ends are connected to mounting seats (3); one end of the hydraulic cylinder (4) is connected to the mounting seat (3), and its piston rod is connected to the top end of the guide column (5); the lower end of the guide column (5) passes through the first lower longitudinal beam (2) and the second lower longitudinal beam (6) in sequence, and is connected to the top end of the walking mechanism (9).

2. The tunnel widening section template trolley according to claim 1, characterized in that: The number of the heightening supports (8) is equal to the number of the gantry columns (1); the heightening supports (8) are located directly below the gantry columns (1).

3. The tunnel widening section formwork trolley according to claim 1, characterized in that: Each set of gantry columns (1) consists of two columns on the left and two on the right, and four hydraulic cylinders (4) are installed on the two sets of gantry columns (1) at the front and rear ends respectively.

4. The tunnel widening section formwork trolley according to any one of claims 1-3, characterized in that: The gantry columns (1) on the same side are connected by two upper and lower longitudinal beams (15); the gantry crossbeams (18) are connected by several longitudinal beams (15).

5. The tunnel widening section formwork trolley according to claim 4, characterized in that: A first scissor bracket (19) is also installed between two adjacent gantry columns (1) on the same side.

6. The tunnel widening section formwork trolley according to claim 1, characterized in that: Each of the gantry columns (1) is equipped with a U-shaped upper gantry (11) on its outer side; the lower end of the upper gantry (11) is detachably equipped with a lower gantry (12) by bolts.

7. The tunnel widening section formwork trolley according to claim 6, characterized in that: A support inclined plate (14) is detachably installed between the bottom end of the lower side gantry (12) and the lower end of the upper side gantry (11); several screw jacks are installed between the upper side gantry (11) and the lower side gantry (12) and the side template; a side template oil cylinder (16) is also installed between the upper side gantry (11) and the side template; the tops and outer walls of several upper side gantry (11) on the same side are connected by longitudinal beams (15); the outer walls of several lower side gantry (12) on the same side are connected by longitudinal beams (15).

8. The tunnel widening section formwork trolley according to claim 6, characterized in that: Triangular reinforcing plates (13) can be detachably installed at the two inner corners of the upper gantry (11) and between the top of the lower gantry (12) and the bottom of the upper gantry (11).

9. The tunnel widening section formwork trolley according to claim 6, characterized in that: A second scissor frame is also installed between two adjacent upper gantry frames (11) on the same side.

10. The tunnel widening section formwork trolley according to claim 6, characterized in that: A reinforcing screw rod (17) is installed between the bottom of the lower gantry (12) and the second lower longitudinal beam (6).

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