A jumbo for high-speed railway tunnel excavation

Abstract

The present invention discloses a jumbo for high-speed railway tunnel excavation, which includes a retractable gantry structure, a support device and a support platform. The gantry structure is arranged at the front and rear parts of the support platform, and the support device is arranged between the gantry structures. The support device includes an upper support structure, a side support structure and a rotating support structure. The side support structure and the rotating support structure can move with the left-right direction telescoping of the wooden frame structure. The rotating support structure is installed on the side of the gantry structure through a rotating mounting plate. The rotating support structure includes a first hydraulic push rod and a second hydraulic push rod connecting the side formwork. The side support structure includes a third hydraulic push rod arranged laterally, a fourth hydraulic push rod with horizontal telescoping and a telescopic lead screw. The upper support structure includes a plurality of fifth hydraulic push rods connecting the upper formwork. One end of the fourth hydraulic push rod is connected to the upper end of the side formwork. The present invention solves the technical problem that it is difficult for a jumbo that can change its height and width to accurately perform preliminary positioning on the mold assembly by itself.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction, and particularly relates to a jumbo for high-speed railway tunnel excavation. Background Art

[0002] During the construction of high-speed railway tunnels, lining support is required, and a jumbo is often used for construction. The jumbo also realizes the carrying of the mold when the mold is removed through the hinged structure between the hydraulic push rod and the mold. When the mold is assembled again, the reverse pushing of the jumbo and the hydraulic push rod against each mold can effectively achieve the preliminary positioning of the mold. However, the existing jumbo structure faces the situation that the cross-sectional dimensions of the tunnel excavation are different. In this case, in the prior art, either different-sized jumbos are used according to the size change, or a variable jumbo structure that can change the height and width is adopted. In the above two cases, the former will cost a lot and take a lot of time because multiple jumbos need to be manufactured to adapt to the size change of the tunnel cross-section, while the latter is difficult to ensure the reliable position of the mold connected thereto when changing the width and size of the jumbo due to the change of the jumbo structure. After each removal of the mold, it is not easy to rely on the jumbo for preliminary positioning when assembling forward again, and manual repeated positioning of the mold is required, which makes the process of installing the mold complicated and also reduces the construction efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a jumbo for high-speed railway tunnel excavation, which is used to solve the technical problem that it is difficult for the jumbo that can change the height and width to adapt to the size change of the tunnel cross-section to accurately perform the preliminary positioning of the mold assembly by itself in the prior art.

[0004] The described jumbo for high-speed railway tunnel excavation includes a retractable gantry structure, a support device, and a support platform installed on the gantry. The gantry structure is arranged at the front and rear parts of the support platform, and the support device is arranged between the gantry structures. The support device includes an upper support structure installed on the upper surface of the support platform, a side support structure installed on the side of the gantry structure, and a rotating support structure. The side support structure and the rotating support structure can move with the left-right direction expansion and contraction of the wooden frame structure. The rotating support structure is installed on the side of the gantry structure through a rotating mounting plate, and the rotating shaft of the rotating mounting plate is arranged in the front-rear direction. The rotating support structure includes a first hydraulic push rod connected between the support platform and the rotating mounting plate and a second hydraulic push rod connected to the side formwork. The side support structure includes a third hydraulic push rod arranged laterally, a fourth hydraulic push rod that horizontally expands and contracts, and a telescopic screw rod. The upper support structure includes a plurality of fifth hydraulic push rods connected to the upper formwork. The telescopic screw rod is used to connect and fix the left and right ends of the upper formwork. One end of the fourth hydraulic push rod is connected to the upper end of the side formwork.

[0005] Preferably, there are at least two side formworks on one side, and the adjacent side formworks are connected by a rotatable connection structure. The side support structure and the rotating support structure can drive the side formworks to rotate and fold, and the connection between the side formworks and the upper formwork is a stepped structure with horizontal splicing and matching.

[0006] Preferably, the gantry structure includes gantry side components and a traveling mechanism arranged symmetrically on the left and right. The gantry side components include support columns, lifting hydraulic cylinders vertically arranged at the upper ends of the support columns, upper fixing plates fixedly connected to the extended ends of the piston rods of the lifting hydraulic cylinders, and gantry platform plates horizontally arranged and fixed on the upper fixing plates. The traveling mechanism is installed at the lower ends of the support columns and can rotate around the center of the support columns after unlocking. The lower parts of the support columns on the front and rear sides are connected by a lower longitudinal beam, and the extended ends of the piston rods on the front and rear sides are connected by an upper longitudinal beam. The gantry platform plate is connected to the support platform through a horizontal telescopic structure.

[0007] Preferably, the horizontal telescopic structure includes horizontal telescopic grooves arranged on the front and rear sides of the support platform. A part of the gantry platform slides and is inserted into the horizontal telescopic grooves. Symmetrically arranged telescopic hydraulic push rods are connected to the bottoms of the front and rear sides of the support platform. One end of the telescopic hydraulic push rod is connected to the bottom of the support platform, and the other end is connected to a telescopic mounting plate. The telescopic mounting plate is vertically arranged and its upper end is fixedly connected to the telescopic end of the piston rod.

[0008] Preferably, the side support structure includes side mounting plates longitudinally arranged and fixed to the upper parts of the gantry structures on the front and rear sides. A first fixing member is fixed on the side mounting plates. One end of a third hydraulic push rod is hinged to the first fixing member. The other end of the third hydraulic push rod is hinged to the middle part of the uppermost side formwork. One end of a fourth hydraulic push rod is fixed on the upper fixing plate and is horizontally arranged transversely. The other end of the fourth hydraulic push rod is hinged to the upper end of the uppermost side formwork. A horizontally transversely extending telescopic lead screw is fixedly installed on the gantry platform plate.

[0009] Preferably, the rotating support structure further includes that both ends of a rotating shaft on the upper side of the rotating mounting plate are respectively connected to the corresponding extended ends of the piston rods. The inner side of the rotating mounting plate is hinged to one end of a first hydraulic push rod. The other end of the first hydraulic push rod is hinged to the bottom of the support platform. A second fixing member is fixed on the outer side of the rotating mounting plate. The second fixing member is hinged to one end of a second hydraulic push rod. The other end of the second hydraulic push rod is hinged to the middle part of the side formworks other than the uppermost side formwork outside the uppermost side formwork. There can be multiple second hydraulic push rods, which are arranged in sequence from top to bottom corresponding to the side formworks other than the uppermost side formwork outside the uppermost side formwork.

[0010] Preferably, the joints between the upper template and the side panels all have a stepped structure. The step surface of the stepped structure on the upper side faces inwards, and the step surface of the stepped structure on the lower side faces outwards. Threaded holes are provided on the inward-facing step surface, and through holes are provided on the outward-facing step surface. Adjacent stepped structures are connected by fixing bolts that vertically penetrate the corresponding step surfaces, and gaskets perpendicular to the fixing bolts are provided between the adjacent step surfaces.

[0011] Preferably, the connection structure connecting the side templates includes a first hinge and a second hinge. The first hinge is provided on the lower side template and includes a mounting plate member one, an L-shaped connecting member, a sliding square bar, and a pivot shaft. The mounting member one is fixedly connected with a sliding square bar through the L-shaped connecting member, and protruding pivot shafts are fixed to the end faces of both ends of the sliding square bar; the second hinge is provided on the upper side template and includes a mounting plate member two, a guide plate, a pair of side guide bars, and a pair of shaft chutes. The guide plate, the side guide bars, and the shaft chutes are all vertically mounted on the mounting plate member two. An open chute is formed between the guide plate and the side guide bars. Both ends of the sliding square bar are slidably matched with the open chute, and the pivot shaft is slidably matched with the shaft chute.

[0012] The advantages of the present invention are as follows: In this solution, since the joints between the side templates and the upper template adopt a horizontally spliced stepped structure, the positioning between the upper template and the side templates can be achieved through the horizontally telescopic hydraulic push rod four and the telescopic screw rod. After the end of the upper template is fixed by the telescopic screw rod, the corresponding end of the upper template at the end of the side template can be accurately spliced together by the hydraulic push rod four, ensuring reliable positioning. After the upper templates are combined, they can be lifted and lowered as a whole with the lifting mechanism of the gantry structure without changing the cross-section. When the left and right positions of the trolley are accurate, the positioning of the upper templates can be ensured to be accurate. The side support structure and the rotating support structure jointly position and support the side templates. When the side support structure contracts, the height of the upper end of the uppermost side template remains unchanged, and at the same time, the side templates are retracted in the inward direction. At the same time, the hydraulic push rod two of the rotating support structure also retracts the other side templates, and through the contraction of the hydraulic push rod one, the rotating support structure and the side templates connected thereto are folded upwards and inwards, reducing the space occupied in the up and down directions after the side templates are retracted. At this time, the gantry structure can be contracted left and right and lifted and lowered with the side templates retracted, and such lifting and left and right movement changes do not affect the connection and positioning between the upper templates, between the side templates, and between the upper template and the side template. Therefore, the defects of the prior art proposed in this application are overcome.

[0013] In addition, since the occupied space can be further reduced by the left - right contraction of the trolley after the side formwork is retracted, the trolley disclosed in this application can even, after one end formwork is assembled, complete the support by means of a support structure such as a lead screw when separated from the trolley, and then the trolley carries another formwork installation plate, and by contracting each part of the trolley, the carried formwork group is made not to contact the supported formwork group. Thus, the support construction of the next formwork group can be carried out in front of the supported formwork group, while the passed formwork group is concreted. In this way, the concreting construction and the support construction of the front and rear sections can be carried out simultaneously, improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a trolley for high - speed railway tunnel excavation according to the present invention when the formwork installation is completed.

[0015] Figure 2 It is a schematic structural diagram of the present invention when the lower - side side formwork is removed.

[0016] Figure 3 It is a schematic structural diagram of the present invention when all side formworks are removed.

[0017] Figure 4 It is a schematic structural diagram of the present invention when the height of the support platform is reduced after all formworks are removed.

[0018] Figure 5 It is a schematic structural diagram of a section of formwork group in the present invention without relying on the trolley support before concreting.

[0019] Figure 6 It is a schematic structural diagram of the connection structure between adjacent side formworks in the present invention.

[0020] Figure 7 For Figure 5 A partial structural schematic diagram after the connection of adjacent side formworks in the shown structure.

[0021] Figure 8 For Figure 7 An enlarged view of area A in the shown structure.

[0022] The reference numerals in the drawings are as follows: 1, upper template; 2, side template; 21, connecting structure; 211, first mounting plate member; 212, L-shaped connecting member; 213, sliding square bar; 214, pivot; 215, guide plate; 216, axial chute; 217, U-shaped structure; 218, side guide bar; 219, second mounting plate member; 22, fixing bolt; 23, supporting screw rod; 24, sealing gasket; 3, supporting platform; 4, gantry structure; 401, traveling mechanism; 402, lower longitudinal beam; 403, supporting column; 404, lifting hydraulic cylinder; 405, piston rod extending end; 406, upper fixing plate; 407, gantry platen; 408, upper longitudinal beam; 409, telescopic hydraulic push rod; 5, supporting device; 501, fifth hydraulic push rod; 502, telescopic screw rod; 503, fourth hydraulic push rod; 504, third hydraulic push rod; 505, side mounting plate; 506, first fixing member; 507, second hydraulic push rod; 508, second fixing member; 509, rotating mounting plate; 510, first hydraulic push rod. Detailed implementation manners

[0023] The following is a further detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings through the description of embodiments, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0024] As Figure 1-8 shown, the present invention provides a jumbo for high-speed railway tunnel excavation, including a telescopic gantry structure 4, a supporting device 5 and a supporting platform 3 mounted on the gantry. The gantry structure 4 is arranged at the front and rear parts of the supporting platform 3, and the supporting device 5 is arranged between the gantry structures 4. The supporting device 5 includes an upper supporting structure mounted on the upper surface of the supporting platform 3, a side supporting structure mounted on the side surface of the gantry structure 4 and a rotating supporting structure. The side supporting structure and the rotating supporting structure can move as the wooden frame structure expands and contracts in the left-right direction. The rotating supporting structure is mounted on the side surface of the gantry structure 4 through a rotating mounting plate 509. The rotating shaft of the rotating mounting plate 509 is arranged in the front-rear direction. The rotating supporting structure includes a first hydraulic push rod 510 connecting the supporting platform 3 and the rotating mounting plate 509 and a second hydraulic push rod 507 connecting the side template 2. The side supporting structure includes a third hydraulic push rod 504 arranged laterally, a fourth hydraulic push rod 503 that horizontally expands and contracts and a telescopic screw rod 502. The upper supporting structure includes a plurality of fifth hydraulic push rods 501 connecting the upper template 1. The telescopic screw rod 502 is used to connect and fix the left and right ends of the upper template 1. One end of the fourth hydraulic push rod 503 is connected to the upper end of the side template 2.

[0025] There are at least two side templates 2 on one side, and adjacent side templates 2 are connected by a rotatable connection structure 21. The side support structure and the rotating support structure can drive the side templates 2 to rotate and fold. The connection between the side templates 2 and the upper template 1 is a stepped structure with horizontal splicing and matching. After the telescopic screw rod 502 fixes the end of the upper template 1, the hydraulic push rod four 503 can accurately splice the corresponding ends of the upper template 1 and the side template 2 together to ensure reliable positioning. The side support structure and the rotating support structure jointly position and support the side template 2. When the side support structure contracts, the height of the upper end of the uppermost side template 2 remains unchanged. When the rotating support structure and the side support structure retract the side template 2 inward at the same time, the positions between the side templates 2 connected by the rotatable connection structure 21 can still maintain the corresponding positions when the above support structure extends, so as to realize the preliminary positioning of the side template 2.

[0026] The gantry structure 4 includes gantry side components and a traveling mechanism 401 arranged symmetrically on the left and right. The gantry side components include support columns 403, a lifting hydraulic cylinder 404 vertically installed at the upper end of the support columns 403, an upper fixing plate 406 fixedly connected to the piston rod extension end 405 of the lifting hydraulic cylinder 404, and a gantry platform plate 407 horizontally arranged and fixed on the upper fixing plate 406. The traveling mechanism 401 is installed at the lower end of the support columns 403 and can rotate around the center of the support columns 403 after being unlocked. The lower parts of the support columns 403 on the front and rear sides are connected by a lower longitudinal beam 402, and the piston rod extension ends 405 on the front and rear sides are connected by an upper longitudinal beam 408. The gantry platform plate 407 is connected to the support platform 3 through a horizontal telescopic structure.

[0027] The horizontal telescopic structure includes horizontal telescopic grooves provided on the front and rear sides of the support platform 3. A part of the gantry platform is slidably inserted into the horizontal telescopic grooves. Both the upper and lower sides of the horizontal telescopic grooves are connected to the gantry platform through balls or rollers. Symmetrically arranged telescopic hydraulic push rods 409 are connected to the bottom of the front and rear sides of the support platform 3. One end of the telescopic hydraulic push rod 409 is connected to the bottom of the support platform 3, and the other end is connected to a telescopic mounting plate. The telescopic mounting plate is vertically arranged, and its upper end is fixedly connected to the telescopic end of the piston rod. The front and rear ends of the gantry platen 407 are provided with extending parts corresponding to extending into the horizontal telescopic grooves at the front and rear parts. A vertical plate is fixedly provided on the part between the extending parts on the side. The lead screw in the side support structure is vertically fixed on the outside of the vertical plate. In this way, the gantry platen 407 can horizontally move relative to the support platform 3 to achieve horizontal telescoping. The telescopic hydraulic push rod 409 and the telescopic mounting plate and the support platform 3 form a triangular diagonal brace. By driving the telescopic hydraulic push rod 409, the door side assembly can move left and right relative to the support platform 3. Before moving, the direction of the traveling mechanism 401 is adjusted so that the traveling wheels can move horizontally. Then, the left and right telescoping of the gantry structure 4 can be achieved through the telescopic hydraulic push rod 409.

[0028] The side support structure includes side mounting plates 505 longitudinally arranged and fixed to the upper parts of the front and rear gantry structures 4. A first fixing member 506 is fixed on the side mounting plate 505. One end of the hydraulic push rod three 504 is hinged to the first fixing member 506. The other end of the hydraulic push rod three 504 is hinged to the middle part of the uppermost side form 2. One end of the hydraulic push rod four 503 is fixed on the upper fixing plate 406 and horizontally arranged. The other end of the hydraulic push rod four 503 is hinged to the upper end of the uppermost side form 2. A horizontally extending telescopic lead screw 502 is fixedly installed on the gantry platen 407. In this way, the telescoping of the two hydraulic push rods of the side support structure does not change the height of the upper end of the uppermost side form 2, which is convenient for the left and right ends of the upper form 1 fixed to the telescopic lead screw 502 to be spliced.

[0029] The rotating support structure further includes that both ends of a rotating shaft above the rotating mounting plate 509 are respectively connected to the corresponding piston rod extension ends 405. The inner side of the rotating mounting plate 509 is hinged to one end of a first hydraulic push rod 510, and the other end of the first hydraulic push rod 510 is hinged to the bottom of the support platform 3. A second fixing member 508 is fixed to the outer side of the rotating mounting plate 509. The second fixing member 508 is hinged to one end of a second hydraulic push rod 507, and the other end of the second hydraulic push rod 507 is hinged to the middle of other side formworks 2 outside the uppermost side formwork 2. There can be multiple second hydraulic push rods 507 which are arranged successively from top to bottom corresponding to other side formworks 2 outside the uppermost side formwork 2. The side formwork 2 can be retracted by the rotating support structure, and through the inward rotation of the rotating mounting plate 509, the hinged side formwork 2 is further rotated inward and retracted, reducing the space occupied in the vertical direction and facilitating the lifting and lowering changes of this trolley.

[0030] The upper support structure includes at least two fifth hydraulic push rods 501 which are used to support the upper formwork 1. When there is more than one upper formwork 1, there are at least three fifth hydraulic push rods 501. The upper ends of the fifth hydraulic push rods 501 are hinged to the corresponding upper formwork 1 and the other ends are hinged to the support platform 3.

[0031] At the joints between the upper formwork 1 and the side panels, there are stepped structures. The step surface of the stepped structure closer to the upper side faces inwards, and the step surface of the stepped structure closer to the lower side faces outwards. Threaded holes are provided on the inward-facing step surfaces, and through holes are provided on the outward-facing step surfaces. Adjacent stepped structures are connected by fixing bolts 22 vertically penetrating the corresponding step surfaces. A gasket 24 perpendicular to the fixing bolts 22 is provided between the adjacent step surfaces to prevent leakage at the joints. This structure has reliable connection and good leak prevention performance after assembly, and is suitable for mobile splicing.

[0032] The connection structure 21 connecting the side templates 2 includes a first hinge and a second hinge. The first hinge is provided on the lower side template 2 and includes a first mounting plate member 211, an L-shaped connecting member, a sliding square bar 213, and a pivot 214. The first mounting member is fixedly connected with the sliding square bar 213 through the L-shaped connecting member. The two end faces of the sliding square bar 213 are fixed with the protruding pivot 214. The second hinge is provided on the upper side template 2 and includes a second mounting plate member 219, a guide plate 215, a pair of side guide bars 218, and a pair of shaft chutes 216. The guide plate 215, the side guide bars 218, and the shaft chutes 216 are all vertically mounted on the second mounting plate member 219. An open chute is formed between the guide plate 215 and the side guide bars 218. The two ends of the sliding square bar 213 are slidably matched with the open chute. The pivot 214 is slidably matched with the shaft chute 216. A gap for the L-shaped connecting member to pass through is left between the pair of side guide bars 218. The upper end of the shaft chute 216 is higher than the upper end of the open chute and forms a closed U-shaped structure. The length of the open chute is not less than the depth of the inner vertical surface of the step structure. After the pivot 214 reaches the U-shaped structure, it rotates in the groove of the U-shaped structure, and at the same time, the sliding square bar 213 disengages from the upper opening of the open chute.

[0033] The upper side edge of the sliding square bar 213 on the side close to the guide plate 215 is a rounded part. The rounded part does not interfere with the upper end of the guide plate 215 when the pivot 214 rotates inward and can rotate freely. While the lower side edge of the sliding square bar 213 on the side close to the guide plate 215 is a right-angle part. The right-angle part can abut against the upper end of the guide plate 215 when the pivot 214 rotates outward, so as to limit the sliding square bar 213 and achieve the effect that the side templates 2 rotate first and then move and join along the open chute during template installation. In this way, it not only ensures that the templates can be joined and connected through the step structure with good anti-leakage performance, avoiding the leakage problems easily caused by too large gaps at the hinge or wear of the rotating shaft in the conventional hinge connection structure 21, but also keeps the side templates 2 hinged to each other after disassembly for easy carrying, and can restore the connection position and relationship during template installation.

[0034] During the use of the present invention, first, the height and width are adjusted to adapt to the tunnel cross-section. When adjusting the width, the traveling mechanism 401 rotates to a state where it can move horizontally, and then the door side components on both sides are driven by the telescopic hydraulic push rod 409 to move symmetrically left and right, achieving width adjustment. After adjusting the width, the height of the support platform 3 is adjusted by the lifting hydraulic cylinder 404. After the adjustment is completed, corresponding templates are connected to each hydraulic push rod, and the templates are pushed by the hydraulic push rods and pressed against the tunnel wall. The construction workers operate on the support platform 3 and the gantry platen 407 to position and connect the upper template 1. In this embodiment, the upper template 1 includes an intermediate upper template 1 and side upper templates 1 on both sides. The upper templates 1 are spliced together through matching step structures, and the splicing part is tightly fixed by the fixing bolts 22 passing through the lower step structure and the sealing gasket 24. The left end or the right end of the side upper template 1 is fixedly connected to the extended end of the telescopic screw rod 502 in the side support structure. In this way, the entire upper template 1 and the upper part of the trolley form a complete and stable support structure. Only when it is necessary to keep supporting the upper template 1 while contracting the door side components left and right, the telescopic screw rod 502 is removed, and the upper template 1 is supported only by the hydraulic push rod five 501 on the support platform 3.

[0035] While the telescopic screw rod 502 is connected to the end of the upper template 1, the side support structure and the rotating support structure also effectively support the side template 2. When it is necessary to remove the template, the side template 2 on the corresponding side is removed one by one through the rotating support structure from bottom to top. The hydraulic push rod two 507 contracts to drive the lower side of the side template 2 to retract inward. Since the side templates 2 are also spliced together through matching step structures, when retracting inward, it first slides inward along the opening chute. When the pivot 214 enters the U-shaped structure, the lower side of the side template 2 is then rotated and retracted inward. The retracted lower side of the side template 2 approaches the rotating mounting plate 509, and the uppermost side template 2 approaches the side mounting plate 505 and the upper end height remains unchanged. Finally, the hydraulic push rod one 510 contracts to rotate and retract the rotating mounting plate 509 and the side template 2 connected thereto inward, so as to leave a large space between the rotated side template 2 and the ground, facilitating the subsequent lowering and contraction of the gantry structure 4.

[0036] In the case of carrying the mold, the trolley structure can still realize the left and right movement of the door side assembly and the connected template, and can also realize the lifting and moving of the support platform 3 and the connected upper template 1, and the related movement process does not affect the connection relationship between the side templates 2. The upper template 1 can also keep the overall support structure unchanged with the support platform 3 at the same time, and there is only a horizontal position change between the upper template 1 and the upper end of the side template 2. Therefore, when restoring the support, it can maintain horizontal movement to achieve the effect of accurate splicing. Therefore, this solution can realize the initial positioning and splicing effect of the template after the template is removed and installed through the trolley structure while realizing the lifting and contraction of the trolley to adapt to tunnels of different cross-sectional sizes, thereby improving the efficiency of template installation. In addition, since the shrinkage effect caused by the above-mentioned lifting and left and right movement does not affect the restoration of the mold position, the corresponding template can be gathered and carried through the tunnel casting section after the template is installed by means of this lifting and contraction. The side templates 2 of the casting section are supported by the support screw 23, and the side template 2 and the adjacent upper template 1 are also supported by the support screw 23. While pouring the previous tunnel section, the formwork installation and support construction of the next section are being carried out, thereby improving the overall construction efficiency.

[0037] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the inventive concept and technical solution of the present invention, or the inventive concept and technical solution are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A trolley for high-speed railway tunnel excavation, characterized in that: It includes a retractable gantry structure (4), a support device (5) and a support platform (3) installed on the gantry. The gantry structure (4) is arranged at the front and rear parts of the support platform (3), the support device (5) is arranged between the gantry structures (4), the support device (5) includes an upper support structure installed on the upper surface of the support platform (3), a side support structure installed on the side surface of the gantry structure (4) and a rotating support structure. The side support structure and the rotating support structure can move as the gantry structure (4) expands and contracts in the left-right direction. The rotating support structure is installed on the side surface of the gantry structure (4) through a rotating mounting plate (509). The rotating shaft of the rotating mounting plate (509) is arranged in the front-rear direction. The rotating support structure includes a first hydraulic push rod (510) connected between the support platform (3) and the rotating mounting plate (509) and a second hydraulic push rod (507) connected to the side formwork (2). The side support structure includes a third hydraulic push rod (504) arranged laterally, a fourth hydraulic push rod (503) with horizontal expansion and contraction and a telescopic lead screw (502). The upper support structure includes a number of fifth hydraulic push rods (501) connected to the upper formwork (1). The telescopic lead screw (502) is used to connect and fix the left and right ends of the upper formwork (1). One end of the fourth hydraulic push rod (503) is connected to the upper end of the side formwork (2); There are at least two side formworks (2) on one side. The adjacent side formworks (2) are connected by a rotatable connection structure (21). The side support structure and the rotating support structure can drive the side formwork (2) to rotate and fold. The connection between the side formwork (2) and the upper formwork (1) is a stepped structure with horizontal splicing and matching; The connection structure (21) connecting the side formworks (2) includes a first hinge and a second hinge. The first hinge is arranged on the lower side of the side formwork (2) and includes a mounting plate member one (211), an L-shaped connecting member, a sliding square bar (213) and a pivot (214). The mounting plate member one (211) is fixedly connected with the sliding square bar (213) through the L-shaped connecting member. The two end faces of the sliding square bar (213) are fixed with the protruding pivot (214); The second hinge is arranged on the upper side of the side formwork (2) and includes a mounting plate member two (219), a guide plate (215), a pair of side guide bars (218) and a pair of shaft chutes (216). The guide plate (215), the side guide bars (218) and the shaft chutes (216) are all vertically installed on the mounting plate member two (219). An open chute is formed between the guide plate (215) and the side guide bars (218). The two ends of the sliding square bar (213) are slidably matched with the open chute, and the pivot (214) is slidably matched with the shaft chute (216).

2. A trolley for high-speed railway tunnel excavation according to claim 1, characterized in that: The gantry structure (4) includes gantry side components and a traveling mechanism (401) symmetrically arranged on the left and right. The gantry side components include support columns (403), a lifting hydraulic cylinder (404) vertically installed at the upper end of the support columns (403), an upper fixing plate (406) fixedly connected to the extended end (405) of the piston rod of the lifting hydraulic cylinder (404), and a gantry platform plate (407) horizontally arranged and fixed on the upper fixing plate (406). The traveling mechanism (401) is installed at the lower end of the support columns (403) and can rotate around the center of the support columns (403) after unlocking. The lower parts of the support columns (403) on the front and rear sides are connected by a lower longitudinal beam (402), and the extended ends (405) of the piston rods on the front and rear sides are connected by an upper longitudinal beam (408). The gantry platform plate (407) is connected to the support platform (3) through a horizontal telescopic structure.

3. The trolley for high - speed railway tunnel excavation according to claim 2, characterized in that: The horizontal telescopic structure includes horizontal telescopic grooves arranged on the front and rear sides of the support platform (3). A part of the gantry platform plate (407) is slidably inserted into the horizontal telescopic grooves. Symmetrically arranged telescopic hydraulic push rods (409) are connected to the bottom of the front and rear sides of the support platform (3). One end of the telescopic hydraulic push rod (409) is connected to the bottom of the support platform (3), and the other end is connected to a telescopic mounting plate. The telescopic mounting plate is vertically arranged and its upper end is fixedly connected to the extended end (405) of the piston rod.

4. The trolley for high - speed railway tunnel excavation according to claim 2, characterized in that: The side support structure includes side mounting plates (505) longitudinally arranged and fixed to the upper parts of the gantry structures (4) on the front and rear sides. A first fixing part (506) is fixed on the side mounting plate (505). One end of a third hydraulic push rod (504) is hinged to the first fixing part (506). The other end of the third hydraulic push rod (504) is hinged to the middle part of the uppermost side formwork (2). One end of a fourth hydraulic push rod (503) is fixed on the upper fixing plate (406) and is horizontally arranged transversely. The other end of the fourth hydraulic push rod (503) is hinged to the upper end of the uppermost side formwork (2). A horizontally transversely extending telescopic lead screw (502) is fixedly installed on the gantry platform plate (407).

5. The trolley for high - speed railway tunnel excavation according to claim 1, characterized in that: The rotating support structure further includes that both ends of a rotating shaft above the rotating mounting plate (509) are respectively connected to the corresponding piston rod extending ends (405). The inner side of the rotating mounting plate (509) is hinged to one end of a first hydraulic push rod (510), and the other end of the first hydraulic push rod (510) is hinged to the bottom of the support platform (3). A second fixing member (508) is fixed to the outer side of the rotating mounting plate (509). The second fixing member (508) is hinged to one end of a second hydraulic push rod (507), and the other end of the second hydraulic push rod (507) is hinged to the middle of other side formworks (2) outside the uppermost side formwork (2). There can be multiple second hydraulic push rods (507) which are arranged in sequence from top to bottom and correspond to other side formworks (2) outside the uppermost side formwork (2).

6. A trolley for high - speed railway tunnel excavation according to claim 1, characterized in that: At the joints of the upper formwork (1) and the side formwork (2), there are step structures. The step surface of the step structure on the upper side faces inwards, and the step surface of the step structure on the lower side faces outwards. Threaded holes are provided on the inwards - facing step surface, and through - holes are provided on the outwards - facing step surface. Adjacent step structures are connected by fixing bolts (22) vertically penetrating the corresponding step surfaces, and a gasket (24) perpendicular to the fixing bolts (22) is provided between adjacent step surfaces.

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