Support-free assembled integral open-cut driving tunnel structure system and construction method

Abstract

The invention discloses a support-free assembled integral open-cut driving tunnel structure system and a construction method. A bottom plate of a tunnel on the lowermost layer is of a bottom plate cast-in-place structure; the side wall and the top plate of each tunnel are each of a laminated slab structure. The laminated slab structure comprises a prefabricated slab facing the interior of the tunnel and a cast-in-place layer facing the exterior of the tunnel. The side wall of the uppermost tunnel and the cast-in-place layer of the top plate are integrally poured, and the cast-in-place layers of the other side walls and the cast-in-place layers of the corresponding top plates are separately poured; during construction, corner connecting components are arranged between the bottom plate and the side wall, between the bottom plate and the middle partition wall, between the top plate and the side wall or between the top plate and the middle partition wall of each tunnel. During construction, the side wall and the top plate of each layer of tunnel are assembled one by one, and the precast slab and the wall-attached enclosure of each side wall are used as a cast-in-place formwork of the side wall to pour concrete. No support is arranged in the construction process, no formwork is needed, efficiency can be improved, and the environment can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated open-cut tunnel construction, and in particular to a support-free assembled integral open-cut vehicle tunnel structure system and a construction method. Background Art

[0002] Urban road tunnels are usually constructed using the traditional open-cut cast-in-place method, which has many problems such as low construction efficiency, high labor costs, difficult quality assurance, and poor construction environment. Prefabricated integral structures are a new direction to solve the problems of low construction efficiency and high labor costs of traditional open-cut cast-in-place tunnels, but they are currently rarely used and the simplified formwork support system has not been considered. The layout of the full-height bracket during construction has led to low construction efficiency and poor construction environment, which has not been truly solved.

[0003] Therefore, how to make the construction method of prefabricated open-cut vehicle tunnels more adaptable to the trend of greening and industrialization transformation of the industry and promote the promotion and application of assembly technology in the field of open-cut tunnels has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the present invention provides a support-free assembled integral open-cut vehicle tunnel structure system and a construction method, the purpose of which is to make the construction process without the need for supports and formwork, thereby improving engineering efficiency, improving the construction environment, solving many problems of the traditional open-cut cast-in-place tunnel construction method, and forming better environmental and economic benefits.

[0005] In order to make the present invention more popular, the present invention selects a project background with strict conditions, that is, the project is located in the core area of ​​the city, the construction site is limited, and the surrounding environmental protection requirements are high. Therefore, the enclosure structure is a wall-mounted enclosure wall and a dense internal support system, and the main structure bottom plate needs to play a role in changing supports during the construction process. If the actual engineering application conditions are more favorable, adjustments and simplifications can be made on the basis of this development plan.

[0006] To achieve the above-mentioned purpose, the present invention discloses a support-free assembled integral open-cut vehicle tunnel structure system, comprising more than one layer of tunnels; all of the tunnels are located underground;

[0007] The bottom slab of the tunnel at the lowest level is a cast-in-place structure using a prefabricated bottom slab reinforcement cage;

[0008] The side walls and top plate of each layer of the tunnel are of composite plate structure;

[0009] Each of the composite slab structures comprises a precast slab facing the interior of the corresponding tunnel and a cast-in-place layer facing the exterior of the corresponding tunnel;

[0010] Except that the cast-in-place layers of the side walls and the top plate of the tunnel at the top layer are cast as one piece, the cast-in-place layers of the side walls of each of the remaining tunnels below the top layer are cast separately from the cast-in-place layers of the corresponding top plates;

[0011] In a vehicle tunnel structure comprising two or more layers of tunnels, the structures between every two adjacent layers of tunnels are middle plates;

[0012] The middle plate serves as the top plate of the tunnel located below, and serves as the bottom plate of the tunnel located above;

[0013] During the construction process, corner connecting components are provided between the bottom plate and the side wall, between the bottom plate and the middle partition wall, between the top plate and the side wall, or between the top plate and the middle partition wall of each tunnel.

[0014] Preferably, the steel bars of the corresponding cast-in-place layer are prefabricated on one side of each prefabricated panel facing the corresponding cast-in-place layer.

[0015] Preferably, at least one layer of the tunnel is provided with at least one intermediate partition wall extending in the length direction, dividing the tunnel into at least two compartments;

[0016] Each of the middle partition walls is the prefabricated panel;

[0017] Any of the prefabricated panels serving as the middle partition walls are arranged vertically to the horizontal plane;

[0018] The bottom plate of the tunnel provided with the middle partition wall is provided with a second rectangular groove opening toward the corresponding middle partition wall at a position corresponding to the corresponding middle partition wall;

[0019] The bottom plate of each tunnel is provided with a first rectangular groove opening toward the corresponding side wall at a position corresponding to the corresponding side wall.

[0020] All of the second rectangular grooves and all of the first rectangular grooves are filled with cast-in-place concrete.

[0021] More preferably, each of the corner connection members comprises an angle steel extending along the length direction of the corresponding tunnel;

[0022] Each of the angle steel grooves with a 90-degree angle is provided with multiple reinforcing ribs along the length direction;

[0023] One side of each of the angle steels is in close contact with the corresponding prefabricated plate arranged perpendicular to the horizontal plane, and the other side is fixed by bolts and embedded sleeves;

[0024] Each of the embedded sleeves is embedded in the corresponding bottom plate, or embedded in the prefabricated plate of the corresponding top plate.

[0025] The present invention also provides a construction method for a support-free assembled integral open-cut vehicle tunnel structure system, which has only one tunnel layer and a single cabin, and comprises the following steps:

[0026] Step A1, preparatory process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring;

[0027] Step A2: hoist the prefabricated bottom plate reinforcement cage into place, and set embedded sleeves at the positions of each corner connection member to complete the casting of the bottom plate cast-in-place structure, and reserve the first rectangular groove;

[0028] Step A3, fixing each of the corner connecting members to the bottom plate by bolts;

[0029] Step A4: hoist the prefabricated panels corresponding to each side wall into place and place them on the vertical supports, and temporarily fix each of the prefabricated panels with diagonal braces;

[0030] Step A5, hoisting the prefabricated plate corresponding to the top plate into place;

[0031] Step A6: Arrange the corresponding corner connection members on the prefabricated panels corresponding to the top panels, wherein the corner connection members are fixed to the top panels or the bottom panels and are closely attached to the side walls;

[0032] Step A7, using the precast panels and the wall-attached enclosure of each side wall as the on-site cast-in-place templates for the side wall to cast concrete, fill the first rectangular groove, and after the initial setting of the concrete of the side wall, cast concrete at the joints and the top plate;

[0033] Step A8: After the concrete reaches the designed strength, all the corner connection members and all the diagonal braces are removed.

[0034] The present invention also provides another construction method of an unsupported assembled integral open-cut vehicle tunnel structure system, which has two layers of tunnels and is a single cabin, comprising the following steps:

[0035] Step B1, pre-process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring;

[0036] Step B2, hoist the prefabricated bottom plate reinforcement cage into place, and set embedded sleeves corresponding to the position of each corner connection component, complete the casting of the bottom plate cast-in-place structure, and reserve the first rectangular groove;

[0037] Step B3, fixing each of the corner connecting members to the bottom plate by bolts;

[0038] Step B4, hoisting the prefabricated panels corresponding to each side wall into place and placing them on vertical supports, and temporarily fixing each of the prefabricated panels with diagonal braces;

[0039] Step B5, hoisting the prefabricated plate corresponding to the top plate of the tunnel at the lower layer into place;

[0040] Step B6, setting the corresponding corner connection member on the prefabricated plate corresponding to the top plate of the tunnel at the lower layer, wherein the corner connection member is fixed to the top plate or the bottom plate and is close to the side wall;

[0041] Step B7, using the precast panels and the wall-attached enclosure of each side wall as a formwork for on-site casting of the side wall to cast concrete;

[0042] Step B8, pouring concrete on the upper side of the precast slab corresponding to the top slab of the tunnel in the lower layer as the bottom slab of the tunnel in the upper layer, and setting all the corner connection components in the tunnel in the upper layer;

[0043] Step B9, hoist the prefabricated panels corresponding to each side wall in the upper layer of the tunnel into place and place them on the vertical supports, and temporarily fix each of the prefabricated panels with diagonal braces;

[0044] Step B10, hoisting the prefabricated plate corresponding to the top plate of the upper tunnel into place;

[0045] Step B11, setting corresponding corner connection members on the prefabricated panels corresponding to the top plate in the upper tunnel layer, and fixing them to the prefabricated panels of each side wall;

[0046] Step B12, using the precast panels and wall-attached enclosures of each side wall of the upper tunnel as the on-site cast-in-place templates for the side walls, and pouring concrete at the joints and the top plate after the initial setting of the concrete of the side walls;

[0047] Step B13: After the concrete reaches the designed strength, remove all the corner connection members and all the diagonal braces.

[0048] Preferably, if any of the tunnels is provided with at least one intermediate partition wall extending in the length direction, when pouring the corresponding bottom plate, a second rectangular groove opening toward the corresponding intermediate partition wall is provided at the position corresponding to the intermediate partition wall;

[0049] Embedded sleeves are provided on the top plate and the bottom plate on both sides of each of the middle partition walls;

[0050] Then, the corner connection member is arranged through the embedded sleeve so that the corner connection member is closely attached to the middle partition wall.

[0051] The present invention also provides a third construction method of a support-free assembled integral open-cut vehicle tunnel structure system, which has only one layer of tunnel and is a double-cabin, comprising the following steps:

[0052] Step C1, pre-process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring;

[0053] Step C2, hoist the prefabricated bottom plate reinforcement cage into place, and set embedded sleeves corresponding to the positions of each corner connection member, complete the casting of the bottom plate cast-in-place structure, and reserve the first rectangular groove;

[0054] Step C3, fixing each of the corner connecting members to the bottom plate by bolts;

[0055] Step C4, hoisting the prefabricated panels corresponding to each side wall and the middle partition wall into place and placing them on the vertical supports, and temporarily fixing each of the prefabricated panels with diagonal braces;

[0056] Step C5, hoisting the prefabricated plate corresponding to the top plate into place;

[0057] Step C6, setting the corresponding corner connection member on the prefabricated plate corresponding to the top plate, wherein the corner connection member is fixed to the top plate or the bottom plate and is close to the side wall;

[0058] Step C7, using the precast panels and the wall-attached enclosure of each side wall as the on-site cast-in-place template for the side wall to cast concrete, and after the concrete of the side wall is initially set, pouring concrete at the joints and the top plate;

[0059] Step C8: After the concrete reaches the designed strength, all the corner connection members and all the diagonal braces are removed.

[0060] Beneficial effects of the present invention:

[0061] The present invention can make the construction process without the need for supports and formwork, thus significantly improving the tunnel construction environment, and has the advantages of low construction difficulty, high construction efficiency, adaptability to soft soil layers, strong structural integrity, and controllable quality. It solves the problems of low construction efficiency and poor construction environment in the traditional open-cut cast-in-place tunnel construction method. Compared with supported assembled integral structures, the present invention has a better construction environment and higher construction efficiency. Compared with fully prefabricated assembled structures, it is easier to construct, has a lower cost, is more adaptable to the foundation pit support requirements in soft soil areas, and has better environmental and economic benefits.

[0062] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A schematic cross-sectional view of a single-cabin single-layer structure in one embodiment of the present invention is shown.

[0064] Figure 2 A schematic cross-sectional view of a single-cabin double-layer structure in one embodiment of the present invention is shown.

[0065] Figure 3 A schematic cross-sectional view of a single-layer double-cabin structure in one embodiment of the present invention is shown.

[0066] Figure 4 A schematic cross-sectional view of a double-cabin double-layer structure in one embodiment of the present invention is shown.

[0067] Figure 5 A schematic structural diagram of a corner connecting member in one embodiment of the present invention is shown.

[0068] Figure 6 A schematic diagram showing the state of executing step A2 in one embodiment of the present invention is shown.

[0069] Figure 7 A schematic diagram showing the state of executing step A3 in one embodiment of the present invention is shown.

[0070] Figure 8 A schematic diagram showing the state of executing step A4 in one embodiment of the present invention is shown.

[0071] Fig. 9 A schematic diagram showing the state of executing step A5 in one embodiment of the present invention is shown.

[0072] Fig.10 A schematic diagram showing the state of executing step A6 in one embodiment of the present invention is shown.

[0073] Fig.11 A schematic diagram showing the state of executing step A7 in one embodiment of the present invention is shown.

[0074] Fig.12 A schematic diagram showing the state of executing step A8 in one embodiment of the present invention is shown.

[0075] Fig.13 A schematic diagram showing the state of executing step B2 in one embodiment of the present invention is shown.

[0076] Fig.14 A schematic diagram showing the state of executing step B3 in one embodiment of the present invention is shown.

[0077] Fig.15 A schematic diagram showing the state of executing step B4 in one embodiment of the present invention is shown.

[0078] Fig.16 A schematic diagram showing the state of executing step B5 in one embodiment of the present invention is shown.

[0079] Fig.17 A schematic diagram showing the state of executing step B6 in one embodiment of the present invention is shown.

[0080] Fig.18 FIG. 1 is a schematic diagram showing the state of executing steps B7 and B8 in one embodiment of the present invention.

[0081] Fig.19 A schematic diagram showing the state of executing step B9 in one embodiment of the present invention.

[0082] Fig. 20 A schematic diagram showing the state of executing step B10 in one embodiment of the present invention is shown.

[0083] Fig.21 A schematic diagram showing the state of executing step B11 in one embodiment of the present invention is shown.

[0084] Fig. 22 A schematic diagram showing the state of executing step B12 in one embodiment of the present invention is shown.

[0085] Fig.23 A schematic diagram showing the state of executing step B13 in one embodiment of the present invention is shown.

[0086] Fig.24 A schematic diagram showing the state of executing step B2 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0087] Fig.25 A schematic diagram showing the state of executing step B3 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0088] Fig.26 A schematic diagram showing the state of executing step B4 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0089] Fig. 27 A schematic diagram showing the state of executing step B5 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0090] Fig.28 A schematic diagram showing the state of executing step B6 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0091] Fig.29 A schematic diagram showing the state of executing steps B7 and B8 when a middle partition wall is required to be provided in an underground passage in one embodiment of the present invention.

[0092] Fig.30 The schematic diagram shows the state of executing step B9 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0093] Fig.31 The schematic diagram shows the state of executing step B10 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0094] Fig.32The schematic diagram shows the state of executing step B11 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0095] Fig.33 A schematic diagram showing the state of executing step B12 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0096] Fig.34 A schematic diagram showing the state of executing step B13 when a middle partition wall is required to be provided in the underground passage in one embodiment of the present invention.

[0097] Fig.35 A schematic diagram showing the state of executing step C2 in one embodiment of the present invention is shown.

[0098] Fig.36 A schematic diagram showing the state of executing step C3 in one embodiment of the present invention is shown.

[0099] Fig.37 A schematic diagram showing the state of executing step C4 in one embodiment of the present invention is shown.

[0100] Fig.38 A schematic diagram showing the state of executing step C5 in one embodiment of the present invention is shown.

[0101] Fig.39 A schematic diagram showing the state of executing step C6 in one embodiment of the present invention is shown.

[0102] Fig.40 A schematic diagram showing the state of casting the cast-in-place layer of the integrally cast top plate and side wall in step C7 in one embodiment of the present invention is shown.

[0103] Fig.41 A schematic diagram showing the state of completing step C7 in one embodiment of the present invention is shown. DETAILED DESCRIPTION

[0104] Example

[0105] like Figures 1 to 4 As shown, the unsupported assembled integral open-cut vehicle tunnel structure system includes more than one layer of tunnels 1; all tunnels 1 are located underground;

[0106] The bottom slab of the tunnel 1 at the lowest level is a cast-in-place bottom slab structure 2 using a prefabricated bottom slab reinforcement cage;

[0107] The side walls 3 and the top plate 4 of each layer of the tunnel 1 are both composite plate structures;

[0108] Each composite slab structure comprises a precast slab 5 facing the interior of the corresponding tunnel 1 and a cast-in-place layer facing the exterior of the corresponding tunnel 1;

[0109] Except for the cast-in-place layers of the side wall 3 and the top plate 4 of the uppermost tunnel 1 which are cast as one piece, the cast-in-place layers of the side wall 3 of each tunnel 1 below the uppermost tunnel 1 are cast separately from the cast-in-place layers of the corresponding top plate 4;

[0110] In a vehicle tunnel structure including more than two layers of tunnels 1, the structures between every two adjacent layers of tunnels 1 are all middle plates;

[0111] The middle plate serves as the top plate 4 of the tunnel 1 located below, and as the bottom plate of the tunnel 1 located above;

[0112] During the construction process, corner connecting members 9 are provided between the bottom plate and the side wall 3 , between the bottom plate and the middle partition wall, between the top plate 4 and the side wall 3 , or between the top plate 4 and the middle partition wall of each tunnel 1 .

[0113] The bottom plate of the tunnel 1 at the bottom of the bottom plate of the present invention adopts a finished prefabricated bottom plate steel cage, and all tunnels 1 are cast in layers to ensure that the foundation pit is sealed in time and the safety of the foundation pit is guaranteed.

[0114] The top plate 4 and the side wall 3 of each tunnel 1 are made of single-sided composite plates.

[0115] The inner side of the side wall 3 is a precast panel 5, and the outer side is a cast-in-place layer. The precast panel 5 and the wall-attached enclosure are used as templates for on-site casting of the side wall;

[0116] The lower layer of the top plate 4 is a precast plate 5, and the upper layer is a cast-in-place layer. In the case of the existence of an upper tunnel 1, the cast-in-place layer of each top plate 4 serves as the bottom plate of the upper tunnel 1, and the precast plate 5 serves as the template of the cast-in-place layer of the top plate. The steel bars of the cast-in-place layer of the top plate are precast in the precast plate to reduce the on-site steel bar binding work.

[0117] The overall structure is formed by on-site assembly of a prefabricated bottom plate steel cage, a prefabricated plate 5 corresponding to the side wall 3, and a prefabricated plate 5 corresponding to the top plate 4, and then pouring concrete after the prefabricated components are connected.

[0118] In some embodiments, one side of each precast panel 5 facing the corresponding cast-in-place layer is prefabricated with steel bars of the corresponding cast-in-place layer.

[0119] like Figure 4 As shown, in some embodiments, at least one layer of the tunnel 1 is provided with at least one intermediate partition wall extending in the length direction, dividing the tunnel 1 into at least two compartments;

[0120] Each middle partition wall is a prefabricated panel 5;

[0121] Any prefabricated panels 5 used as the middle partition wall are arranged vertically to the horizontal plane;

[0122] The bottom plate of the tunnel 1 provided with a middle partition wall is provided with a second rectangular groove 6 opening toward the corresponding middle partition wall at a position corresponding to the corresponding middle partition wall;

[0123] The bottom plate of each tunnel 1 is provided with a first rectangular groove 7 opening toward the corresponding side wall 3 at a position corresponding to the corresponding side wall 3 .

[0124] All the second rectangular grooves 6 and all the first rectangular grooves 7 are filled with cast-in-place concrete.

[0125] like Figure 5 As shown, in some embodiments, each corner connection member 9 includes an angle steel 91 extending along the length direction of the corresponding tunnel 1;

[0126] Each angle steel 91 has a groove with a 90-degree angle, and multiple reinforcing ribs 92 are provided along the length direction;

[0127] One side of each angle steel is in close contact with the corresponding prefabricated plate 5 arranged perpendicular to the horizontal plane, and the other side is fixed by bolts 93 and embedded sleeves 94;

[0128] Each embedded sleeve 94 is embedded in the corresponding bottom plate, or embedded in the prefabricated plate 5 of the corresponding top plate 4.

[0129] like Figures 6 to 12 As shown, the present invention also provides a construction method for a support-free assembled integral open-cut vehicle tunnel structure system, which has only one layer of tunnel 1 and is a single cabin, and includes the following steps:

[0130] Step A1, preparatory process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring;

[0131] Step A2, hoist the prefabricated bottom plate reinforcement cage into place, and set the embedded sleeve 94 corresponding to the position of each corner connection member 9, complete the casting of the bottom plate cast-in-place structure 2, and reserve the first rectangular groove 7;

[0132] Step A3, fixing each corner connecting member 9 to the bottom plate by bolts 93;

[0133] Step A4, hoist the prefabricated panels 5 corresponding to each side wall 3 into place and place them on the vertical support, and temporarily fix each prefabricated panel 5 with diagonal braces;

[0134] Step A5, hoisting the prefabricated plate 5 corresponding to the top plate 4 into place;

[0135] Step A6, a corresponding corner connecting member 9 is arranged on the prefabricated plate 5 corresponding to the top plate 4, and the corner connecting member 9 is fixed to the top plate 4 or the bottom plate and is closely attached to the side wall 3;

[0136] Step A7, using the precast panels 5 and the wall-attached enclosure of each side wall 3 as the on-site casting template of the side wall 3 to cast concrete, fill the first rectangular groove 7, and after the concrete of the side wall 3 is initially set, cast the concrete of the joint and the top plate 4;

[0137] Step A8: After the concrete reaches the designed strength, remove all corner connection members 9 and all diagonal braces.

[0138] like Figures 13 to 23 As shown, the present invention also provides another construction method of an unsupported assembled integral open-cut vehicle tunnel structure system, which has two layers of tunnels 1 and is a single cabin, and includes the following steps:

[0139] Step B1, pre-process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring;

[0140] Step B2, hoist the prefabricated bottom plate reinforcement cage into place, and set the embedded sleeve 94 corresponding to the position of each corner connection member 9, complete the pouring of the bottom plate cast-in-place structure 2, and reserve the first rectangular groove 7;

[0141] Step B3, fixing each corner connecting member 9 to the bottom plate by bolts 93;

[0142] Step B4, hoist the prefabricated panels 5 corresponding to each side wall 3 into place and place them on the vertical support, and temporarily fix each prefabricated panel 5 with diagonal braces;

[0143] Step B5, hoisting the prefabricated plate 5 corresponding to the top plate 4 of the lower tunnel 1 into place;

[0144] Step B6, a corresponding corner connecting member 9 is arranged on the prefabricated plate 5 corresponding to the top plate 4 of the lower tunnel 1, and the corner connecting member 9 is fixed to the top plate 4 or the bottom plate and is closely attached to the side wall 3;

[0145] Step B7, using the precast panels 5 and the wall-attached enclosure of each side wall 3 as a formwork for on-site casting of the side wall 3 to cast concrete;

[0146] Step B8, pouring concrete on the upper side of the precast slab 5 corresponding to the top slab 4 of the lower tunnel 1 as the bottom slab of the upper tunnel 1, and setting all corner connection members 9 in the upper tunnel 1;

[0147] Step B9, hoist the prefabricated panels 5 corresponding to each side wall 3 in the upper layer of the tunnel 1 into place and place them on the vertical support, and temporarily fix each prefabricated panel 5 with diagonal braces;

[0148] Step B10, hoisting the prefabricated plate 5 corresponding to the top plate 4 of the upper tunnel 1 into place;

[0149] Step B11, setting corresponding corner connecting members 9 on the prefabricated panels 5 corresponding to the top plate 4 in the upper layer of the tunnel 1, and fixing them to the prefabricated panels 5 of each side wall 3;

[0150] Step B12, using the precast panels 5 and the wall-attached enclosure of each side wall 3 of the upper tunnel 1 as the template for on-site casting of the side wall 3 to cast concrete, and after the concrete of the side wall 3 is initially set, pouring concrete at the joints and the top plate 4;

[0151] Step B13: After the concrete reaches the designed strength, remove all corner connection members 9 and all diagonal braces.

[0152] like Figures 24 to 34 As shown, in some embodiments, if at least one intermediate partition wall extending in the length direction is provided in any tunnel 1, when pouring the corresponding bottom plate, a second rectangular groove 6 opening toward the corresponding intermediate partition wall is provided at the position corresponding to the corresponding intermediate partition wall;

[0153] Pre-embedded sleeves 94 are provided on the top plate 4 and the bottom plate on both sides of each middle partition wall;

[0154] Then, the corner connecting member 9 is arranged through the embedded sleeve 94 so that the corner connecting member 9 is closely attached to the middle partition wall.

[0155] like Figures 35 to 41 As shown, the present invention also provides a third construction method of a support-free assembled integral open-cut vehicle tunnel structure system, which has only one layer of tunnel 1 and is a double-cabin, and includes the following steps:

[0156] Step C1, pre-process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring;

[0157] Step C2, hoist the prefabricated bottom plate reinforcement cage into place, and set the embedded sleeve 94 corresponding to the position of each corner connection member 9, complete the casting of the bottom plate cast-in-place structure 2, and reserve the first rectangular groove 7;

[0158] Step C3, fixing each corner connecting member 3 to the bottom plate by means of bolts 93;

[0159] Step C4, hoist the prefabricated panels 5 corresponding to each side wall 3 and the middle partition wall into place and place them on the vertical supports, and temporarily fix each prefabricated panel with diagonal braces;

[0160] Step C5, hoisting the prefabricated plate 5 corresponding to the top plate 4 into place;

[0161] Step C6, setting corresponding corner connecting members 9 on the prefabricated panels 5 corresponding to the top panel 4, wherein the corner connecting members 9 are fixed to the top panel 4 or the bottom panel and closely attached to the side wall 3;

[0162] Step C7, using the precast panels 5 and the wall-attached enclosure of each side wall 3 as the template for on-site casting of the side wall to cast concrete, and after the concrete of the side wall 3 is initially set, pouring concrete at the joints and the top plate 4;

[0163] Step C8: After the concrete reaches the designed strength, remove all corner connection members 9 and all diagonal braces.

[0164] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An unsupported assembled integral open-cut vehicle tunnel structure system, comprising more than one layer of tunnels (1); all of the tunnels (1) are located underground; characterized in that: The bottom plate of the tunnel (1) at the lowest level is a cast-in-place bottom plate structure (2) using a prefabricated bottom plate steel cage; The side walls (3) and the top plate (4) of each layer of the tunnel (1) are both laminated plate structures; Each of the composite slab structures comprises a prefabricated slab (5) facing the interior of the corresponding tunnel (1) and a cast-in-place layer facing the exterior of the corresponding tunnel (1); Except for the cast-in-place layers of the side walls (3) and the top plate (4) of the tunnel (1) at the top layer, which are cast as one piece, the cast-in-place layers of the side walls (3) of each of the tunnels (1) below the tunnel (1) at the top layer are cast separately from the cast-in-place layers of the corresponding top plate (4); In a vehicle tunnel structure comprising two or more layers of tunnels (1), the structures between every two adjacent layers of tunnels (1) are all middle plates; The middle plate serves as the top plate (4) of the tunnel (1) located below, and as the bottom plate of the tunnel (1) located above; During the construction process, corner connecting components (9) are provided between the bottom plate and the side wall (3), between the bottom plate and the middle partition wall, between the top plate (4) and the side wall (3), or between the top plate (4) and the middle partition wall of each tunnel (1).

2. The unsupported assembled integral open-cut vehicle tunnel structure system according to claim 1 is characterized in that: The side of each prefabricated plate (5) facing the corresponding cast-in-place layer is prefabricated with steel bars of the corresponding cast-in-place layer.

3. The unsupported assembled integral open-cut vehicle tunnel structure system according to claim 1 is characterized in that: At least one layer of the tunnel (1) is provided with at least one intermediate partition wall extending in the length direction, so as to divide the tunnel (1) into at least two compartments; Each of the middle partition walls is the prefabricated panel (5); Any of the prefabricated panels (5) serving as the middle partition wall is arranged vertically to the horizontal plane; The bottom plate of the tunnel (1) provided with the middle partition wall is provided with a second rectangular groove (6) opening in the direction of the corresponding middle partition wall at a position corresponding to the middle partition wall; The bottom plate of each tunnel (1) is provided with a first rectangular groove (7) opening toward the corresponding side wall (3) at a position corresponding to the corresponding side wall (3); All the second rectangular grooves (6) and all the first rectangular grooves (7) are filled with cast-in-place concrete.

4. The unsupported assembled integral open-cut vehicle tunnel structure system according to any one of claims 1 to 3, characterized in that: Each of the corner connection members (9) comprises an angle steel (91) extending along the length direction of the corresponding tunnel (1); A plurality of reinforcing ribs (92) are provided along the length direction in the groove of each angle steel (91) with an included angle of 90 degrees; One side of each of the angle steels is in close contact with the corresponding prefabricated plate (5) arranged perpendicular to the horizontal plane, and the other side is fixed by bolts (93) and embedded sleeves (94); Each of the embedded sleeves (94) is embedded in the corresponding bottom plate, or embedded in the prefabricated plate (5) of the corresponding top plate (4).

5. A construction method for an unsupported assembled integral open-cut vehicle tunnel structure system, characterized in that: There is only one tunnel (1) and it is a single cabin, and the following steps are included: Step A1, pre-process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring; Step A2, hoisting the prefabricated bottom plate reinforcement cage into place, and setting the embedded sleeve (94) corresponding to the position of each corner connection member (9), completing the pouring of the bottom plate cast-in-place structure (2), and reserving the first rectangular groove (7); Step A3, fixing each of the corner connecting members (9) to the bottom plate by means of bolts (93); Step A4, hoisting the prefabricated panels (5) corresponding to each side wall (3) into place and placing them on vertical supports, and temporarily fixing each of the prefabricated panels (5) with diagonal braces; Step A5, hoisting the prefabricated plate (5) corresponding to the top plate (4) into place; Step A6: The corresponding corner connecting member (9) is arranged on the prefabricated plate (5) corresponding to the top plate (4); the corner connecting member (9) is fixed to the top plate (4) or the bottom plate and is closely attached to the side wall (3); Step A7, using the precast panels (5) and the wall-attached enclosure of each side wall (3) as the on-site formwork for casting the side wall (3), pouring concrete, filling the first rectangular groove (7), and after the concrete of the side wall (3) has initially set, pouring concrete at the joints and the top plate (4); Step A8: After the concrete reaches the designed strength, all the corner connection members (9) and all the diagonal braces are removed.

6. A construction method for an unsupported assembled integral open-cut vehicle tunnel structure system, characterized in that: There are two tunnels (1) with a single cabin, including the following steps: Step B1, pre-process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring; Step B2, hoisting the prefabricated bottom plate reinforcement cage into place, and setting the embedded sleeve (94) corresponding to the position of each corner connection member (9), completing the pouring of the bottom plate cast-in-place structure (2), and reserving the first rectangular groove (7); Step B3, fixing each of the corner connecting members (9) to the bottom plate by means of bolts (93); Step B4, hoisting the prefabricated panels (5) corresponding to each side wall (3) into place and placing them on vertical supports, and temporarily fixing each of the prefabricated panels (5) with diagonal braces; Step B5, hoisting the prefabricated plate (5) corresponding to the top plate (4) of the tunnel (1) at the lower layer into place; Step B6, the prefabricated plate (5) corresponding to the top plate (4) of the tunnel (1) at the lower layer is provided with a corresponding corner connecting member (9), wherein the corner connecting member (9) is fixed to the top plate (4) or the bottom plate and is closely attached to the side wall (3); Step B7, using the prefabricated panels (5) and the wall-attached enclosure of each side wall (3) as a formwork for on-site casting of the side wall (3) and pouring concrete; Step B8, pouring concrete on the upper side of the precast slab (5) corresponding to the top slab (4) of the tunnel (1) at the lower layer as the bottom slab of the tunnel (1) at the upper layer, and setting all the corner connection members (9) in the tunnel (1) at the upper layer; Step B9, hoisting the prefabricated panels (5) corresponding to each side wall (3) in the upper layer of the tunnel (1) into place and placing them on the vertical support, and temporarily fixing each of the prefabricated panels (5) with diagonal braces; Step B10, hoisting the prefabricated plate (5) corresponding to the top plate (4) of the upper tunnel (1) into place; Step B11, setting the corresponding corner connection members (9) on the prefabricated panels (5) corresponding to the top panel (4) in the upper tunnel (1), and fixing them to the prefabricated panels (5) of each side wall (3); Step B12, using the precast panels (5) and the wall-attached enclosure of each side wall (3) of the upper tunnel (1) as a template for on-site casting of the side wall (3) to cast concrete, and after the concrete of the side wall (3) has initially set, pouring concrete at the joints and the top plate (4); Step B13: After the concrete reaches the designed strength, all the corner connection members (9) and all the diagonal braces are removed.

7. The construction method of the unsupported assembled integral open-cut vehicle tunnel structure system according to claim 6 is characterized in that: If at least one intermediate partition wall extending in the length direction is provided in any of the tunnels (1), when pouring the corresponding bottom plate, a second rectangular groove (6) opening in the direction of the corresponding intermediate partition wall is provided at the position corresponding to the corresponding intermediate partition wall; Embedded sleeves (94) are provided on the top plate (4) and the bottom plate on both sides of each of the middle partition walls; Then, the corner connection component (9) is arranged through the embedded sleeve (94) so ​​that the corner connection component (9) is closely attached to the middle partition wall.

8. A construction method for an unsupported assembled integral open-cut vehicle tunnel structure system, characterized in that: There is only one tunnel (1) with two chambers, including the following steps: Step C1, pre-process; specifically including foundation pit enclosure construction and support erection, foundation pit excavation and cushion layer pouring; Step C2, hoisting the prefabricated bottom plate reinforcement cage into place, and setting the embedded sleeve (94) corresponding to the position of each corner connection member (9), completing the pouring of the bottom plate cast-in-place structure (2), and reserving the first rectangular groove (7); Step C3, fixing each of the corner connecting members (3) to the bottom plate by means of bolts (93); Step C4, hoisting the prefabricated panels (5) corresponding to each side wall (3) and the middle partition wall into place and placing them on the vertical supports, and temporarily fixing each of the prefabricated panels with diagonal braces; Step C5, hoisting the prefabricated plate (5) corresponding to the top plate (4) into place; Step C6, providing the corresponding corner connection member (9) on the prefabricated plate (5) corresponding to the top plate (4), wherein the corner connection member (9) is fixed to the top plate (4) or the bottom plate and is closely attached to the side wall (3); Step C7, using the precast panels (5) and the wall-attached enclosure of each side wall (3) as the template for on-site casting of the side wall to cast concrete, and after the concrete of the side wall (3) has initially set, pouring concrete at the joints and the top plate (4); Step C8: After the concrete reaches the designed strength, all the corner connection members (9) and all the diagonal braces are removed.

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