Support structure, construction device and construction method of variable span tunnel chamber

Abstract

The present invention relates to the technical field of tunnel excavation, and provides a support structure, a construction device, and a construction method for a variable-span tunnel chamber, wherein the support structure comprises: a supporting crossbeam, a supporting longitudinal beam, and an adjusting template; a plurality of the supporting crossbeams are arranged at intervals along a first direction; a plurality of the supporting longitudinal beams are connected to at least two adjacent supporting crossbeams along the first direction; the adjusting template is laid on the outer surface of two adjacent supporting crossbeams; wherein the adjusting template can adjust the support shape according to the outer surface shape of the supporting crossbeam. The present invention provides a support structure, a construction device, and a construction method for a variable-span tunnel chamber, wherein the support structure is adapted to all chambers with variable spans and variable curve radians by setting an adjusting template. The utilization efficiency of the template is improved, and at the same time, the area of ​​a single template is large, the curve radian is accurate, and the construction quality of the chamber is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel excavation, and in particular to a supporting structure, a construction device and a construction method for a variable-span tunnel chamber. Background Art

[0002] At present, the common cavern types in high-speed railway tunnels include: comprehensive equipment cavern, power equipment cavern, communication equipment cavern, overhead line switch control station, overhead line electric disconnector cavern and disaster prevention fan control cavern, etc. The cavern structure is generally a city gate cavern, that is, the arch is an arc and the side wall is a straight wall. The span is 3.5 to 10m, the arc radius is 2 to 10m, and the arc angle is 90 to 150°.

[0003] In recent years, my country has built many high-speed railways, and there are two types of cavern construction templates. One is to use standard steel templates, which are formed by bending steel plates with a thickness of 3 to 6 mm. Due to the large number of cavern types, different spans and curves, many types of standard steel templates need to be made. Due to the different number of caverns, the template utilization rate is low and the cost is high; the second is to use small flat templates for construction, mostly using 150×30cm template combination construction. Because the arch of the cavern is mostly curved, the use of flat templates will cause the arch to be composed of multiple straight lines, which has a poor appearance.

[0004] The construction process of tunnel chambers is as follows: construction preparation → steel bar binding (if there are structural steel bars) → formwork installation → annular support structure installation → formwork reinforcement → pouring concrete → concrete reinforcement → formwork removal. From the experience of tunnels constructed in the past, this construction method is not ideal because there are many tunnel chambers, and each chamber needs to reinstall and adjust the formwork, which slows the construction speed. Summary of the invention

[0005] The present invention proposes a support structure for variable-span tunnel chambers, which is used to solve the defect in the prior art that each chamber needs to be reinstalled and adjusted due to the large number of tunnel chambers, resulting in a slow construction speed. By setting an adjustable template, it can adapt to all chambers with variable spans and variable curves. The utilization efficiency of the template is improved, and at the same time, the area of ​​a single template is large, the curve is accurate, and the construction quality of the chamber is improved.

[0006] The present invention also proposes a construction device for variable-span tunnel chambers, which is used to solve the defect in the prior art that each chamber needs to be reinstalled and adjusted due to the large number of tunnel chambers, resulting in a slow construction speed. By setting an adjustable template, it is possible to adapt to all chambers with variable spans and variable curves. The utilization efficiency of the template is improved, and at the same time, the area of ​​a single template is large, the curve is accurate, and the construction quality of the chamber is improved.

[0007] The present invention further proposes a construction method for a variable-span tunnel cavern, which is used to solve the defect in the prior art that due to the large number of tunnel caverns, each cavern needs to be reinstalled and adjusted, resulting in a slow construction speed. The curvature of the tunnel cavern is measured in advance during the construction process, and supporting beams with corresponding curvatures are processed, and then a unified adjustable template is used, thereby improving the utilization efficiency of the template. At the same time, the area of ​​a single template is large, the curve curvature is accurate, and the construction quality of the cavern is improved. The setting of the adjustable template can adapt to all caverns with variable spans and variable curve curvatures.

[0008] According to a first aspect of the present invention, a support structure for a variable-span tunnel chamber is provided, comprising: a supporting crossbeam, a supporting longitudinal beam and an adjustable template;

[0009] A plurality of the supporting beams are arranged at intervals along a first direction;

[0010] A plurality of the supporting longitudinal beams are connected to at least two adjacent supporting transverse beams along the first direction;

[0011] The adjustment template is laid on the outer surfaces of two adjacent supporting beams;

[0012] Wherein, the adjustment template can adjust the support shape according to the outer surface shape of the supporting beam.

[0013] According to one embodiment of the present invention, the support beam comprises: a top support beam and a side support beam;

[0014] The top supporting beam is a curved beam;

[0015] The two side support beams are respectively connected to two ends of the top support beam;

[0016] Wherein, the adjustment template can adjust the corresponding support shape according to the curvature of the top supporting beam.

[0017] Specifically, this embodiment provides an implementation method of a supporting beam. By setting the supporting beam to a top supporting beam and a side supporting beam, segmented processing of the tunnel chamber support is realized. The top supporting beam and the side supporting beam are both arc-shaped segments. During the processing, the supporting beam can be pre-processed according to the shape of the tunnel chamber with different curvatures.

[0018] According to one embodiment of the present invention, the adjustment template comprises: a support plate and a support rib;

[0019] The two opposite side edges of the support plate are provided with a plurality of flanges at intervals;

[0020] A gap is provided between two adjacent flanges;

[0021] A plurality of the supporting ribs are arranged at intervals on the surface of the supporting plate and are connected to the flanges on both sides of the supporting plate.

[0022] Specifically, this embodiment provides an implementation method for an adjustable template, by arranging the support ribs to be connected to the flanges on both sides of the support plate, that is, arranging them along the first direction, it provides convenience for adjusting the curvature of the adjustable template according to the outer surface of the supporting beam, avoiding the problem of being unable to bend due to the circumferential arrangement of the support ribs along the supporting beam.

[0023] Furthermore, the adjustable formwork can be processed with light metals such as steel or aluminum alloy. Depending on the material, the weight of a single formwork is controlled within a range of 75 to 150 kg, and the horizontal and vertical lengths of the adjustable formwork are controlled within a range of 1.0 to 3.0 m.

[0024] Furthermore, the supporting rib is processed from "L" shaped or square metal with a side length of 40 to 80 mm.

[0025] Furthermore, transverse ribs may be provided at the position where the flange is set, and the transverse ribs are respectively connected to the flange and the supporting plate to strengthen the strength of the flange. At the same time, the transverse ribs are only provided at the connection position with the flange, which ensures the strength without affecting the bending of the adjustment template.

[0026] According to an embodiment of the present invention, it further comprises: a first adjustment hole, wherein the first adjustment hole is arranged on the flange;

[0027] Wherein, at least part of the first adjustment holes are used to realize the connection between two adjacent adjustment templates.

[0028] Specifically, this embodiment provides another implementation method of the adjustment template. By setting a first adjustment hole, on the one hand, the connection of the adjustment template in the first direction of the supporting beam is achieved, and on the other hand, an adjustment position is provided for the adjustment template to adjust the curvature according to the outer surface shape of the supporting beam.

[0029] It should be noted that some of the first adjustment holes can be set as threaded holes, so as to facilitate the connection of two adjacent adjustment templates by bolts.

[0030] According to one embodiment of the present invention, it also includes: an adjustment mechanism, one end of which cooperates with the first adjustment hole, and the other end abuts against the inner surface of the supporting beam, for adjusting the supporting shape of the adjustment template according to the outer surface shape of the supporting beam.

[0031] Specifically, this embodiment provides another implementation of the adjustment template, which realizes the adjustment of the curvature shape of the adjustment template through the support beam through an adjustment mechanism that abuts against the inner surface of the support beam.

[0032] It should be noted that the inner surface of the supporting beam refers to the other side of the outer surface of the supporting beam relative to the adjustment template, rather than the inner side of the supporting beam.

[0033] Furthermore, the supporting cross beam is processed by 14 to 25 I-beams, and the supporting longitudinal beam is processed by 14 to 25 I-beams.

[0034] According to one embodiment of the present invention, the adjustment mechanism comprises: an adjustment seat, an adjustment screw and an adjustment nut;

[0035] The adjustment seat is a plate-shaped structure abutting against the inner surface of the supporting beam, and a through hole is provided on the surface of the adjustment seat;

[0036] The adjusting nut is arranged on the surface of the adjusting seat corresponding to the through hole, and the surface is the other side of the adjusting seat abutting against the supporting beam;

[0037] Wherein, the adjusting screw comprises a first adjusting rod and a second adjusting rod connected to each other to form an L-shaped structure;

[0038] The first adjusting rod passes through the adjusting nut and is provided with a thread matching with the adjusting nut;

[0039] The second adjusting rod is plug-fitted into the first adjusting hole.

[0040] Specifically, this embodiment provides an implementation method of an adjustment mechanism, through which the adjustment template is adjusted according to the external shape of the supporting beam. In actual applications, after the adjustment screw, the adjustment seat and the adjustment nut are assembled, they can be arranged on both sides of the side edges of the adjustment template along the circumferential direction of the supporting beam. By stretching both sides of the adjustment template, the adjustment of the adjustment template according to the shape of the supporting beam is achieved.

[0041] In an application scenario, eight first adjustment holes are provided on the flange of the adjustment template, and the adjustment mechanism formed by assembling the adjustment screw, the adjustment seat and the adjustment nut cooperates with the first and eighth first adjustment holes respectively to stretch and bend the shape of the adjustment template. When in use, the adjustment mechanism passes through two adjustment templates spliced ​​along the first direction and stretches and bends the two adjustment templates at the same time.

[0042] According to an embodiment of the present invention, it further comprises: second adjustment holes, the second adjustment holes being arranged at least at intervals on the support ribs close to both sides of the support plate;

[0043] Wherein, at least part of the second adjustment holes are used to realize the connection between two adjacent adjustment templates.

[0044] Specifically, this embodiment provides another implementation of the adjustment template, which realizes the fixed connection of the adjustment template along the circumferential direction on the outer surface of the supporting beam by setting the second adjustment hole.

[0045] It should be noted that some of the second adjustment holes can be set as threaded holes to facilitate the connection of two adjacent adjustment templates through bolts.

[0046] According to a second aspect of the present invention, a construction device for a variable-span tunnel chamber is provided, comprising: a frame, a connecting screw and the above-mentioned support structure for a variable-span tunnel chamber;

[0047] Wherein, the supporting cross beam and the supporting longitudinal beam are laid on the outside of the frame and are connected to the frame through the connecting screw.

[0048] According to a third aspect of the present invention, a construction method for a variable-span tunnel chamber is provided. When executing the construction method, the above-mentioned construction device for a variable-span tunnel chamber is used, comprising:

[0049] Get the outline dimensions of the cave;

[0050] Processing the supporting cross beam, the supporting longitudinal beam and the adjusting template according to the outline size of the cavern;

[0051] Connecting the supporting cross beam and the supporting longitudinal beam to the frame through the connecting screw;

[0052] Laying the adjustment template on the outer surface of the supporting beam, and adjusting the shape of the adjustment template according to the shape of the supporting beam;

[0053] Pushing the frame into the cavern for support;

[0054] Concrete pouring in the cavern.

[0055] According to an embodiment of the present invention, after the step of pouring concrete in the cavern, the method further includes:

[0056] Re-obtaining the outline dimensions of the cavern;

[0057] If the outline size of the cavern changes, the supporting beam is re-processed according to the outline size of the cavern;

[0058] Remove the original supporting beams one by one and replace them with supporting beams that have been reprocessed according to the contour dimensions of the cavern;

[0059] Re-adjust the shape of the adjustment template to the shape of the supporting beam.

[0060] Specifically, this embodiment provides a method for constructing caverns according to different contour sizes. The supporting beams are reprocessed according to the different contour sizes of the caverns, and the adjustable templates can be mass-produced and adjusted according to the size of the cavern to match the outer surface shape of the supporting beams.

[0061] Furthermore, the side support beams of the support beams can also be mass-produced, and the top support beams only need to be bent according to the different contour sizes of the caverns.

[0062] The above one or more technical solutions in the present invention have at least one of the following technical effects: the support structure, construction device and construction method of a variable span tunnel chamber provided by the present invention can adapt to all chambers with variable spans and variable curves by setting an adjustable template. The utilization efficiency of the template is improved, and at the same time, the area of ​​a single template is large, the curve is accurate, and the construction quality of the chamber is improved.

[0063] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0065] Figure 1 This is one of the schematic diagrams of the assembly relationship of the support structure of the variable-span tunnel chamber provided by the present invention;

[0066] Figure 2 This is the second schematic diagram of the assembly relationship of the support structure of the variable-span tunnel chamber provided by the present invention;

[0067] Figure 3 It is a schematic diagram of the structural relationship of the adjustable template in the support structure of the variable-span tunnel chamber provided by the present invention;

[0068] Figure 4 It is a schematic diagram of the coordination relationship between the supporting beam, the adjusting template and the adjusting mechanism in the supporting structure of the variable-span tunnel chamber provided by the present invention;

[0069] Figure 5 This is one of the schematic diagrams of the assembly relationship of the adjustment mechanism provided by the present invention;

[0070] Figure 6 This is the second schematic diagram of the assembly relationship of the adjustment mechanism provided by the present invention;

[0071] Figure 7 It is a schematic diagram of an adjustment seat in the adjustment mechanism provided by the present invention;

[0072] Figure 8 It is a schematic diagram of the assembly relationship of the construction device of the variable-span tunnel chamber provided by the present invention;

[0073] Fig. 9 yes Figure 8 Schematic diagram of direction A.

[0074] Reference numerals:

[0075] 10. Support beam; 11. Top support beam; 12. Side support beam;

[0076] 20. Support longitudinal beams;

[0077] 30. Adjustment template; 31. Support plate; 32. Support rib; 33. Flanging; 34. First adjustment hole; 35. Second adjustment hole;

[0078] 40. Adjustment mechanism; 41. Adjustment seat; 42. Adjustment nut; 43. First adjustment rod; 44. Second adjustment rod;

[0079] 50. Frame;

[0080] 60. Connect the screw. DETAILED DESCRIPTION

[0081] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0082] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0083] In some specific embodiments of the present invention, Figures 1 to 7 As shown, the present solution provides a support structure for a variable-span tunnel chamber, comprising: a supporting crossbeam 10, a supporting longitudinal beam 20 and an adjusting template 30; a plurality of supporting crossbeams 10 are arranged at intervals along a first direction; a plurality of supporting longitudinal beams 20 are connected to at least two adjacent supporting crossbeams 10 along the first direction; the adjusting template 30 is laid on the outer surface of two adjacent supporting crossbeams 10; wherein the adjusting template 30 can adjust the support shape according to the outer surface shape of the supporting crossbeam 10.

[0084] In detail, the present invention proposes a support structure for a variable-span tunnel chamber, which is used to solve the defect in the prior art that each chamber needs to be reinstalled and adjusted due to the large number of tunnel chambers, resulting in a slow construction speed. By setting an adjustable template 30, it is possible to adapt to all chambers with variable spans and variable curves. The utilization efficiency of the template is improved, and at the same time, the area of ​​a single template is large, the curve is accurate, and the construction quality of the chamber is improved.

[0085] In some possible embodiments, the supporting beam 10 includes: a top supporting beam 11 and a side supporting beam 12; the top supporting beam 11 is an arc-shaped beam; the two side supporting beams 12 are respectively connected to the two ends of the top supporting beam 11; wherein the adjusting template 30 can adjust the corresponding support shape according to the curvature of the top supporting beam 11.

[0086] Specifically, this embodiment provides an implementation method of a supporting beam 10. By setting the supporting beam 10 to be a top supporting beam 11 and a side supporting beam 12, segmented processing of tunnel chamber support is achieved. The top supporting beam 11 and the side supporting beam 12 are both arc-shaped segments. During the processing, the supporting beam 10 can be pre-processed according to the shape of the tunnel chamber with different curvatures.

[0087] In some possible embodiments, the adjustment template 30 includes: a support plate 31 and support ribs 32; a plurality of flanges 33 are arranged at intervals on two opposite sides of the support plate 31; a gap is arranged between two adjacent flanges 33; a plurality of support ribs 32 are arranged at intervals on the surface of the support plate 31, and are connected to the flanges 33 on both sides of the support plate 31.

[0088] Specifically, this embodiment provides an implementation method of an adjustment template 30, by setting the support ribs 32 to be connected to the flanges 33 on both sides of the support plate 31, that is, setting them along the first direction, it provides convenience for the adjustment template 30 to adjust the curvature according to the outer surface of the support beam 10, avoiding the problem of being unable to bend due to the circumferential arrangement of the support ribs 32 along the support beam 10.

[0089] Furthermore, the adjustable template 30 can be made of light metal such as steel or aluminum alloy. Depending on the material, the weight of a single template is controlled within a range of 75 to 150 kg, and the horizontal and vertical lengths of the adjustable template 30 are controlled within a range of 1.0 to 3.0 m.

[0090] Furthermore, the supporting rib 32 is made of “L” shaped or square metal, and the side length is 40 to 80 mm.

[0091] Furthermore, transverse ribs may be provided at the position where the flange 33 is provided. The transverse ribs are respectively connected to the flange 33 and the support plate 31 to strengthen the strength of the flange 33. Meanwhile, the transverse ribs are only provided at the connection position with the flange 33, which ensures the strength without affecting the bending of the adjustment template 30.

[0092] In some possible embodiments, the first adjustment holes 34 are further included. The first adjustment holes 34 are disposed on the flange 33 . At least part of the first adjustment holes 34 are used to connect two adjacent adjustment templates 30 .

[0093] Specifically, this embodiment provides another implementation of the adjustment template 30. By setting the first adjustment hole 34, on the one hand, the connection of the adjustment template 30 in the first direction of the supporting beam 10 is achieved, and on the other hand, an adjustment position is provided for the adjustment template 30 to adjust the curvature according to the outer surface shape of the supporting beam 10.

[0094] It should be noted that some of the first adjustment holes 34 can be configured as threaded holes, so as to facilitate the connection of two adjacent adjustment templates 30 by bolts.

[0095] In some possible embodiments, it also includes: an adjustment mechanism 40, one end of which cooperates with the first adjustment hole 34, and the other end abuts against the inner surface of the supporting beam 10, so as to adjust the supporting shape of the adjustment template 30 according to the outer surface shape of the supporting beam 10.

[0096] Specifically, this embodiment provides another implementation of the adjustment template 30 , which realizes the adjustment of the arc shape of the adjustment template 30 through the support beam 10 through the adjustment mechanism 40 that abuts against the inner surface of the support beam 10 .

[0097] It should be noted that the inner surface of the supporting beam 10 is the other side of the outer surface of the supporting beam 10 relative to the adjustment template 30, rather than the inner side of the supporting beam 10.

[0098] Furthermore, the supporting cross beam 10 is processed by using 14 to 25 I-beams, and the supporting longitudinal beam 20 is processed by using 14 to 25 I-beams.

[0099] In some possible embodiments, the adjustment mechanism 40 includes: an adjustment seat 41, an adjustment screw and an adjustment nut 42; the adjustment seat 41 is a plate-like structure that abuts against the inner surface of the supporting beam 10, and a through hole is provided on the surface of the adjustment seat 41; the adjustment nut 42 is provided on the surface of the adjustment seat 41 corresponding to the through hole, and the surface is the other side of the adjustment seat 41 abutting against the supporting beam 10; wherein the adjustment screw includes a first adjustment rod 43 and a second adjustment rod 44 connected to each other to form an L-shaped structure; the first adjustment rod 43 passes through the adjustment nut 42 and is provided with a thread that cooperates with the adjustment nut 42; the second adjustment rod 44 is plugged into and cooperates with the first adjustment hole 34.

[0100] Specifically, this embodiment provides an implementation method of an adjustment mechanism 40, through which the adjustment mechanism 40 is used to adjust the adjustment template 30 according to the external shape of the supporting beam 10. In actual applications, after the adjustment screw, the adjustment seat 41 and the adjustment nut 42 are assembled, they can be arranged on both sides of the adjustment template 30 along the circumferential direction of the supporting beam 10. By stretching both sides of the adjustment template 30, the adjustment of the adjustment template 30 according to the shape of the supporting beam 10 is achieved.

[0101] In an application scenario, eight first adjustment holes 34 are provided on the flange 33 of the adjustment template 30. The adjustment mechanism 40 formed by assembling the adjustment screw, the adjustment seat 41 and the adjustment nut 42 cooperates with the first and eighth first adjustment holes 34 respectively to stretch and bend the shape of the adjustment template 30. When in use, the adjustment mechanism 40 passes through the two adjustment templates 30 spliced ​​along the first direction, and stretches and bends the two adjustment templates 30 at the same time. The stretching and bending of the adjustment template 30 is achieved by rotating the adjustment nut 42.

[0102] In some possible embodiments, the second adjustment holes 35 are further included. The second adjustment holes 35 are at least spaced apart at the support ribs 32 on both sides of the support plate 31 . At least part of the second adjustment holes 35 are used to connect two adjacent adjustment templates 30 .

[0103] Specifically, this embodiment provides another implementation of the adjustment template 30 , which realizes the fixed connection of the adjustment template 30 on the outer surface of the supporting beam 10 along the circumferential direction by providing the second adjustment hole 35 .

[0104] It should be noted that some of the second adjustment holes 35 can be configured as threaded holes, so as to facilitate the connection of two adjacent adjustment templates 30 by bolts.

[0105] In some specific embodiments of the present invention, Figures 1 to 9As shown, the present scheme provides a construction device for a variable-span tunnel chamber, comprising: a frame 50, a connecting screw 60 and a support structure for a variable-span tunnel chamber as described above; wherein, the supporting cross beam 10 and the supporting longitudinal beam 20 are laid on the outside of the frame 50 and are connected to the frame 50 through the connecting screw 60.

[0106] In detail, the present invention also proposes a construction device for variable-span tunnel chambers, which is used to solve the defect in the prior art that each chamber needs to be reinstalled and adjusted due to the large number of tunnel chambers, resulting in a slow construction speed. By setting an adjustable template 30, it is possible to adapt to all chambers with variable spans and variable curves. The utilization efficiency of the template is improved, and at the same time, the area of ​​a single template is large, the curve is accurate, and the construction quality of the chamber is improved.

[0107] In some specific embodiments of the present invention, the present solution provides a construction method of a variable-span tunnel chamber. When executing the construction method, the above-mentioned construction device of a variable-span tunnel chamber is used, including:

[0108] Get the outline dimensions of the cave;

[0109] Processing the supporting cross beam 10, supporting longitudinal beam 20 and adjusting template 30 according to the outline size of the cavern;

[0110] Connect the support cross beam 10 and the support longitudinal beam 20 to the frame 50 via the connecting screw 60;

[0111] Laying the adjustment template 30 on the outer surface of the supporting beam 10, and adjusting the shape of the adjustment template 30 according to the shape of the supporting beam 10;

[0112] Push the frame 50 into the cave for support;

[0113] Concrete pouring in the cavern.

[0114] In detail, the present invention proposes a construction method for variable-span tunnel chambers to solve the defect in the prior art that each chamber needs to be reinstalled and adjusted due to the large number of tunnel chambers, resulting in a slow construction speed. The curvature of the tunnel chamber is measured in advance during the construction process, and the supporting beam 10 with the corresponding curvature is processed, and then a unified adjustable template is used to improve the utilization efficiency of the template. At the same time, the area of ​​a single template is large and the curve curvature is accurate, which improves the construction quality of the chamber. The setting of the adjustable template can adapt to all chambers with variable spans and variable curve curvatures.

[0115] In some possible embodiments, after the step of pouring concrete in the cavern, the following steps are specifically included:

[0116] Re-obtain the outline dimensions of the cavern;

[0117] If the outline size of the cavern changes, the supporting beam 10 is re-processed according to the outline size of the cavern;

[0118] The original supporting beams 10 are removed one by one and replaced with supporting beams 10 that are reprocessed according to the contour size of the cavern;

[0119] The shape of the adjustment template 30 is readjusted according to the shape of the supporting beam 10 .

[0120] Specifically, this embodiment provides a method for constructing caverns according to different contour sizes. The supporting beam 10 is reprocessed according to the different contour sizes of the cavern, and the adjustment template 30 can be mass-produced and adjusted according to the size of the cavern to match the outer surface shape of the supporting beam 10.

[0121] Furthermore, the side support beams 12 of the support beams 10 can also be mass-produced, and the top support beams 11 only need to be bent according to the different contour sizes of the caverns.

[0122] In an application scenario, the present invention provides a construction method for a variable-span tunnel chamber, which comprises the following steps:

[0123] S1: According to the cavern profiles with different spans and different curves, the support beams 10 and the support beams 20 are cold-bent, the frame 50 is welded, and the adjustment template 30 is processed and brought into the site;

[0124] S2: Measure and lay out, tie up the cavern reinforcement (if any), and support the beam 10;

[0125] S3: Install the adjustment template 30, and use the adjustment mechanism 40 to pull the adjustment template 30 through the first adjustment hole 34 on the adjustment template 30 until it is in close contact with the supporting beam 10, and then connect the adjustment templates 30 with connecting bolts after they are in close contact;

[0126] S4: Install the supporting longitudinal beam 20, and connect the adjustable formwork, the supporting I-beam, the formwork connection tool and the supporting longitudinal beam 20 into a whole;

[0127] S5: Install the frame 50 in place, install the connecting screw 60, and connect the frame 50 and the supporting longitudinal beam 20 through the connecting screw 60;

[0128] S6: pouring concrete;

[0129] S7: After the concrete solidifies, the screw rod is removed, the frame 50 is pushed out, and the construction device is hoisted as a whole to the next working surface.

[0130] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0131] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A support structure for a variable span tunnel chamber, characterized in that: include: Support beams, support longitudinal beams and adjustment formwork; A plurality of the supporting beams are arranged at intervals along a first direction; A plurality of the supporting longitudinal beams are connected to at least two adjacent supporting transverse beams along the first direction; The adjustment template is laid on the outer surfaces of two adjacent supporting beams; The adjustment template can adjust the support shape according to the outer surface shape of the supporting beam. Wherein, the support beams include: a top support beam and a side support beam; The top supporting beam is a curved beam; The two side support beams are respectively connected to two ends of the top support beam; The adjustment template can adjust the corresponding support shape according to the curvature of the top support beam. Wherein, the adjustment template comprises: a support plate and a support rib; The two opposite side edges of the support plate are provided with a plurality of flanges at intervals; A gap is provided between two adjacent flanges; A plurality of the supporting ribs are arranged at intervals on the surface of the supporting plate and connected to the flanges on both sides of the supporting plate. Wherein, the support structure further comprises: a first adjustment hole, which is arranged on the flange; wherein at least part of the first adjustment hole is used to realize the connection between two adjacent adjustment templates, Wherein, the support structure also includes: an adjustment mechanism, one end of which cooperates with the first adjustment hole, and the other end abuts against the inner surface of the support beam, for adjusting the support shape of the adjustment template according to the outer surface shape of the support beam.

2. A support structure for a variable-span tunnel chamber according to claim 1, characterized in that: The adjusting mechanism comprises: an adjusting seat, an adjusting screw and an adjusting nut; The adjustment seat is a plate-shaped structure abutting against the inner surface of the supporting beam, and a through hole is provided on the surface of the adjustment seat; The adjusting nut is arranged on the surface of the adjusting seat corresponding to the through hole, and the surface of the adjusting seat is the other side where the adjusting seat abuts against the supporting beam; Wherein, the adjusting screw comprises a first adjusting rod and a second adjusting rod connected to each other to form an L-shaped structure; The first adjusting rod passes through the adjusting nut and is provided with a thread matched with the adjusting nut; The second adjusting rod is plug-fitted into the first adjusting hole.

3. The support structure of a variable-span tunnel chamber according to claim 1, characterized in that: Also includes: second adjustment holes, the second adjustment holes being arranged at least at intervals on the supporting ribs close to both sides of the supporting plate; Wherein, at least part of the second adjustment holes are used to realize the connection between two adjacent adjustment templates.

4. A construction device for a variable span tunnel chamber, characterized in that: include: A frame, a connecting screw and a support structure for a variable-span tunnel chamber as described in any one of claims 1 to 3; Wherein, the supporting cross beam and the supporting longitudinal beam are laid on the outside of the frame and are connected to the frame through the connecting screw.

5. A construction method for a variable-span tunnel chamber, characterized in that: When executing the construction method, a construction device for a variable-span tunnel chamber as described in claim 4 is used, comprising: Get the outline dimensions of the cave; Processing the supporting cross beam, the supporting longitudinal beam and the adjusting template according to the outline size of the cavern; Connecting the supporting cross beam and the supporting longitudinal beam to the frame through the connecting screw; Laying the adjustment template on the outer surface of the supporting beam, and adjusting the shape of the adjustment template according to the shape of the supporting beam; Pushing the frame into the cavern for support; The cavern is poured with concrete.

6. The construction method of a variable-span tunnel chamber according to claim 5, characterized in that: After the step of pouring concrete in the cavern, the method further includes: Re-obtaining the outline dimensions of the cavern; If the outline size of the cavern changes, the supporting beam is re-processed according to the outline size of the cavern; The original supporting beams are removed one by one, and replaced with supporting beams that have been reprocessed according to the outline size of the cavern; The shape of the adjustment template is readjusted according to the shape of the supporting beam.

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