Variable cross-section tunnel secondary lining trolley
By designing a variable-section tunnel two-lined trolley with adjustable width, the problem of difficulty in adapting to variable-section tunnel construction in the prior art is solved, and efficient and highly adaptable construction results are achieved.
Patent Information
- Application Number
- CN202420839642.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-22
AI Technical Summary
The existing technology is difficult to adapt to tunnel construction with changes in variable cross-section size and profile, resulting in the need of multiple sets of trolleys to increase costs and inconvenience, and the full-house scaffolding erecting and demolition project is large in size and safety hazards.
A variable-section tunnel two-lined trolley is designed. By setting up a secondary gantry and a distance adjustment piece, the width of the trolley is adjusted to adapt to tunnel construction with different cross-sectional sizes.
No need to replace the trolley, which improves construction efficiency, strong adaptability, and reduces costs and construction complexity.
Smart Images
Figure CN222668194U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tunnel construction, and in particular relates to a second lining trolley for a variable-section tunnel. Background Art
[0002] Secondary lining (referred to as secondary lining) is a cast-in-place concrete or reinforced concrete lining applied inside the primary support during the construction of a mining tunnel. The secondary lining and the primary support together form a composite lining; the secondary lining bears the load acting on the secondary lining due to possible deterioration of the primary support of the tunnel, or the additional load caused by soft rock creep, changes in environmental conditions, etc., and serves as a safety reserve.
[0003] For the construction of the secondary lining arch wall of the mining tunnel, an integral lining trolley or a full-height scaffolding is generally used, but the existing technologies have defects. For example, the integral lining trolley is only suitable for tunnels with good surrounding rock, long lines, single-size sections, and small radius. For tunnels with variable cross-sectional dimensions and profiles, multiple sets of trolleys need to be purchased according to the changes in the tunnel cross-sectional dimensions, which not only increases the investment cost, but also makes cross-section operations inconvenient for the transportation of materials and equipment.
[0004] The use of full-height scaffolding (i.e., using scaffolding to support the entire construction tunnel, and the scaffolding needs to be built from the ground of the construction tunnel) is suitable for secondary lining construction in any section and in areas with good geological conditions. However, the scaffolding erection and dismantling project is large in volume and cannot be moved, blocking the passage of equipment and materials, requiring many high-altitude operations and posing great safety hazards. Especially for ultra-large section tunnels using the CRD construction method, the cost area is large and the construction period is uncontrollable.
[0005] Therefore, there is an urgent need to solve the problems of limited secondary lining working space in mining-method tunnels with ultra-large sections in soft surrounding rock strata, variable section sizes and contours, large-angle turning lines, cross-operations, the need to invest multiple sets of trolleys, single section adaptability, and low operating efficiency. Utility Model Content
[0006] In view of the above problems in the prior art, the present application proposes a variable-section tunnel secondary lining trolley, which realizes trolley width adjustment by setting a sub-gantry to be suitable for variable-section tunnel construction.
[0007] The utility model proposes a variable-section tunnel secondary lining trolley, comprising a trolley body, a template assembly and a widening assembly; the trolley body comprises a main portal; the main portal comprises a plurality of main crossbeams with horizontal axes, and the centers of the main crossbeams are located on the center line of the tunnel structure; the widening assembly comprises a sub-portal and a distance adjusting member; the sub-portal is arranged on one side of the main portal, and the distance adjusting member is connected between the main portal and the sub-portal to adjust the distance between the sub-portal and the main portal; the template assembly comprises a top template and two sets of side templates; the top template is arranged at the upper ends of the main portal and the sub-portal, and the two sets of side templates are respectively located at the opposite side ends of the main portal and the sub-portal.
[0008] Furthermore, the center of the top template is located on the center line of the tunnel structure.
[0009] Furthermore, the secondary portal includes a plurality of secondary crossbeams with horizontal axes, one end of each secondary crossbeam being connected to one end of each main crossbeam; the formwork assembly also includes a formwork support; a portion of the formwork support is supported between the main crossbeam and the top formwork, and another portion of the formwork support is supported between the secondary crossbeam and the top formwork.
[0010] Furthermore, the secondary crossbeam comprises a plurality of sections of beam structure; the plurality of sections of beam structure are arranged at intervals in the horizontal direction; and the distance adjusting member is arranged between two adjacent sections of beam structure.
[0011] Furthermore, the distance adjusting member comprises a horizontally arranged hydraulic cylinder; the hydraulic cylinder has a fixed end and a telescopic end, the fixed end is connected to a section of the beam structure, and the telescopic end is connected to another section of the beam structure.
[0012] Furthermore, the trolley body also includes a main walking mechanism, and the main walking mechanism is arranged at the lower end of the main portal.
[0013] Furthermore, the widening assembly also includes an auxiliary traveling mechanism; the auxiliary traveling mechanism is arranged at the lower end of the auxiliary gantry.
[0014] The utility model has the beneficial effect that a sub-gantry and a distance adjusting member are arranged on one side of the main gantry of the trolley body, and the distance adjusting member is used to adjust the distance between the sub-gantry and the main gantry, thereby adjusting the distance between the two sets of side templates to adapt to the construction of variable-section tunnels. There is no need to replace the trolley, which improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the existing standard section secondary lining trolley.
[0016] Figure 2It is a schematic structural diagram of the variable-section tunnel secondary lining trolley of the utility model under the tunnel section A.
[0017] Figure 3 It is a schematic structural diagram of the variable-section tunnel secondary lining trolley of the utility model under the B section of the tunnel.
[0018] Figure 4 It is a structural schematic diagram of the distance adjusting member of the utility model.
[0019] In the figure, 1-main portal; 2-main crossbeam; 3-auxiliary portal; 4-auxiliary crossbeam; 5-support beam; 6-top formwork; 7-side formwork; 8-formwork support; 9-beam structure; 10-flange; 11-hydraulic cylinder; 12-first connecting steel plate; 13-main walking mechanism; 14-auxiliary walking mechanism; 15-existing standard section second lining trolley; 16-tunnel. DETAILED DESCRIPTION
[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0021] like Figure 1 As shown, the width of the existing standard cross-section secondary lining trolley 15 is fixed and cannot be applied to the construction of tunnels 16 with different cross-sections. Figure 2 As shown, the inner profile of the lining of section A of tunnel 16 is compared with Figure 1 The standard section of the tunnel main line is widened by 1.816m and raised by 0.923m. Figure 3 The inner profile of the tunnel lining in section B is shown compared to Figure 1 The standard section of the tunnel main line is widened by 2.0m and raised by 0.75m.
[0022] like Figure 2 , 3 The variable-section tunnel secondary lining trolley of the present embodiment shown comprises a trolley body, a template assembly and a widening assembly; the trolley body comprises a main portal 1; the main portal 1 comprises a plurality of main beams 2 with horizontal axes, and the center of the main beam 2 is located on the center line of the tunnel structure; the trolley body of the present embodiment has the same or similar structure to the existing standard secondary lining trolley.
[0023] The widening component includes a sub-gantry 3 and a distance adjustment member; the sub-gantry 3 is arranged on one side of the main gantry 1, and the structure of the sub-gantry 3 can be regarded as half of the main gantry 1. For example, the structure of the main gantry 1 on the right side of the tunnel structure centerline is the structure of the sub-gantry 3, such as Figure 3 shown.
[0024] The trolley body also includes a main traveling mechanism 13, which is arranged at the lower end of the main portal 1. The widening assembly also includes an auxiliary traveling mechanism 14; the auxiliary traveling mechanism 14 is arranged at the lower end of the auxiliary portal 3. The main traveling mechanism 13 and the auxiliary traveling mechanism 14 can adopt the traveling mechanism adopted by the existing second lining trolley.
[0025] The template assembly includes a top template 6 and two sets of side templates 7; the top template 6 is arranged at the upper ends of the main portal frame 1 and the auxiliary portal frame 3, and the two sets of side templates 7 are respectively located at the opposite side ends of the main portal frame 1 and the auxiliary portal frame 3. Figure 2 , Figure 3 As shown, the center of the top template 6 is located on the center line of the tunnel structure. The auxiliary portal 3 includes a plurality of horizontal auxiliary beams 4, one end of which is connected to one end of the main beam 2; the template assembly also includes a template support 8; a part of the template support 8 is supported between the main beam 2 and the top template 6, and another part of the template support 8 is supported between the auxiliary beam 4 and the top template 6.
[0026] like Figure 2 , Figure 3 As shown, the auxiliary mast 3 of this embodiment is further provided with a support beam 5 below the auxiliary cross beam 4, and the two ends of the support beam 5 are respectively connected to the main mast 1 and the auxiliary mast 3. The support beam 5 can also adopt a telescopic structure, or a distance adjustment member can be provided on the support beam 5.
[0027] The distance adjusting member is connected between the main portal frame 1 and the auxiliary portal frame 3, and is used to adjust the distance between the auxiliary portal frame 3 and the main portal frame 1. The auxiliary cross beam 4 includes a multi-section beam structure 9; the multi-section beam structure 9 is arranged at intervals along the horizontal direction; Figure 4 As shown, a distance adjusting member is provided between two adjacent sections of the beam structure 9. The distance adjusting member includes a horizontally arranged hydraulic cylinder 11; the hydraulic cylinder 11 has a fixed end and a telescopic end, the fixed end is connected to one section of the beam structure 9, and the telescopic end is connected to another section of the beam structure 9. Specifically, the fixed end and the telescopic end of the hydraulic cylinder 11 are respectively connected to a first connecting steel plate 12. Flanges 10 are respectively provided at both ends of each section of the beam structure 9, and the first connecting steel plates 12 at both ends of the hydraulic cylinder 11 are respectively connected to the flanges 10 of the two sections of the beam structure 9 by bolts. The multi-section beam structure 9 adopted by the above-mentioned secondary crossbeam 4 and the hydraulic cylinder 11 arranged between the two sections of the beam structure 9 as the structural form of the distance adjusting member are also applicable to the support beam 5. The support beam 5 and the secondary crossbeam 4 both adopt I-beams.
[0028] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.
Claims
1. A variable cross-section tunnel secondary lining trolley, characterized in that: It includes a trolley body, a template assembly and a widening assembly; the trolley body includes a main portal; the main portal includes a plurality of main beams with horizontal axes, and the center of the main beams is located on the center line of the tunnel structure; the widening assembly includes a sub-portal and a distance adjustment member; the sub-portal is arranged on one side of the main portal, and the distance adjustment member is connected between the main portal and the sub-portal to adjust the distance between the sub-portal and the main portal; the template assembly includes a top template and two sets of side templates; The top template is arranged at the upper ends of the main portal and the auxiliary portal, and the two sets of side templates are respectively located at the opposite side ends of the main portal and the auxiliary portal; The secondary portal frame includes a plurality of secondary beams with horizontal axes, one end of each secondary beam being connected to one end of each main beam; the formwork assembly also includes a formwork support; a portion of the formwork support is supported between the main beam and the top formwork, and another portion of the formwork support is supported between the secondary beam and the top formwork; The secondary cross beam comprises a plurality of beam structures; the plurality of beam structures are arranged at intervals in the horizontal direction; and the distance adjusting member is arranged between two adjacent beam structures; The distance adjustment member comprises a horizontally arranged hydraulic cylinder; the hydraulic cylinder has a fixed end and a telescopic end, the fixed end is connected to a section of the beam structure, and the telescopic end is connected to another section of the beam structure; The trolley body also includes a main walking mechanism, which is arranged at the lower end of the main gantry; The width-increasing assembly further comprises an auxiliary traveling mechanism; the auxiliary traveling mechanism is arranged at the lower end of the auxiliary gantry.
2. The variable cross-section tunnel secondary lining trolley according to claim 1, characterized in that: The center of the top template is located on the center line of the tunnel structure.