CN116104536A - A trolley for high-speed railway tunnel excavation - Google Patents

Abstract

The invention discloses a trolley for excavating a high-speed railway tunnel, which comprises a telescopic portal structure, a supporting device and a supporting platform, wherein the portal structure is arranged at the front part and the rear part of the supporting platform, the supporting device is arranged between the portal structures, the supporting device comprises an upper supporting structure, a side supporting structure and a rotating supporting structure, the side supporting structure and the rotating supporting structure can stretch and retract along the left and right directions of the wood frame structure, the rotating supporting structure is arranged on the side surface of the portal structure through a rotating mounting plate, the rotating supporting structure comprises a hydraulic push rod I and a hydraulic push rod II connected with a side template, the side supporting structure comprises a hydraulic push rod III arranged laterally, a hydraulic push rod IV horizontally stretched and a telescopic screw rod, the upper supporting structure comprises a plurality of hydraulic push rods V connected with the upper template, and one end of each hydraulic push rod IV is connected with the upper end of the side template. The invention solves the technical problem that the trolley with changeable height and width is difficult to accurately position the die assembly preliminarily by itself.

Description

A trolley for high-speed railway tunnel excavation

technical field

The invention belongs to the technical field of tunnel construction, and in particular relates to a trolley used for excavating high-speed railway tunnels.

Background technique

Lining support is required during the construction of high-speed rail tunnels, and trolleys are often used for construction. The trolley also uses the hinged structure between the hydraulic push rod and the mold to carry the mold when the mold is removed, and the platform is used when the mold is assembled again. The reverse push of each mold by the car and the hydraulic push rod can effectively realize the preliminary positioning of the mold. However, the existing trolley structure is faced with the situation that the cross-sectional size is different in tunnel excavation. At this time, in the prior art, either trolleys of different sizes are used according to the size change, or variable trolleys that can change the height and width can be used. structure. In the above two cases, the former will need to manufacture multiple trolleys to adapt to the size change of the tunnel section, which is costly and time-consuming, while the latter is difficult to ensure that the width and size of the trolleys are changed due to changes in the trolley structure. The position of the connected mold is reliable. After removing the mold each time, it is not easy to rely on the trolley for preliminary positioning when reassembling forward. It is necessary to manually repeat the positioning of the mold. Therefore, the process of installing the mold becomes complicated and reduces the construction efficiency.

Contents of the invention

The purpose of the present invention is to provide a trolley for high-speed railway tunnel excavation, which is used to solve the problem that the trolley that can change the height and width to adapt to the size of the tunnel section in the prior art is difficult to accurately initially position the mold assembly by itself question.

The trolley for excavating a high-speed railway tunnel includes a retractable portal frame structure, a support device and a support platform installed on the portal frame. The portal frame structure is arranged at the front and back of the support platform. The support device is arranged between the gantry structures, and the support device includes an upper support structure installed on the support platform, a side support structure installed on the side of the gantry structure, and a rotating support. protection structure, the side support structure and the rotating support structure can move with the expansion and contraction of the wooden frame structure in the left and right direction, the rotation support structure is installed on the side of the door frame structure through a rotating mounting plate, the The rotating shaft of the rotating installation plate is set in the front and back directions, and the rotating support structure includes a hydraulic push rod one connected between the support platform and the rotating mounting plate and a hydraulic push rod two connected to the side formwork, and the side support The structure includes laterally arranged hydraulic push rods 3, horizontally telescopic hydraulic push rods 4 and telescopic screw rods. The upper support structure includes a number of hydraulic push rods 5 connected to the upper formwork. The left and right ends of the above template, one end of the hydraulic push rod 4 is connected to the upper end of the side template.

Preferably, there are at least two side templates on one side, and adjacent side templates are connected by a rotatable connection structure, and the side support structure and the rotation support structure can drive the side templates to rotate and fold, and the The connection between the side formwork and the upper formwork is a step structure of horizontal splicing and matching.

Preferably, the gantry structure includes a left-right symmetrical door-side assembly and a traveling mechanism, the door-side assembly includes a supporting column, a lifting hydraulic cylinder installed vertically on the upper end of the supporting column, and the lifting hydraulic cylinder The extended end of the piston rod is fixedly connected to the upper fixed plate, and the gantry platform is horizontally arranged and fixed on the upper fixed plate. The center is the shaft rotation, the lower parts of the support columns on the front and rear sides are connected by the lower longitudinal beams, the piston rod extension ends on the front and rear sides are connected by the upper longitudinal beams, and the gantry platform and the support platform are connected by a horizontal telescopic structure connected.

Preferably, the horizontal telescopic structure includes horizontal telescopic slots arranged on the front and rear sides of the support platform, a part of the portal platform is slidably inserted into the horizontal telescopic slot, and the front and rear sides of the support platform The bottoms are connected with telescopic hydraulic push rods arranged symmetrically. One end of the telescopic hydraulic push rods is connected to the bottom of the support platform and the other end is connected to the telescopic mounting plate. The telescoping end of the piston rod is fixedly connected.

Preferably, the side support structure includes a side mounting plate arranged longitudinally and fixed at the upper part of the door frame structure on the front and rear sides at both ends, a fixing part 1 is fixed on the side mounting plate, and the fixing part 1 is hinged with the One end of the hydraulic push rod three, the other end of the hydraulic push rod three is hinged in the middle of the uppermost side formwork, one end of the hydraulic push rod four is fixed on the upper fixing plate and arranged horizontally and horizontally, the hydraulic push rod The other end of bar four is hinged on the upper end of the uppermost side formwork, and a telescopic screw rod protruding horizontally and laterally is fixedly installed on the door frame platen.

Preferably, the rotating support structure further includes that the two ends of the rotating shaft on the upper side of the rotating mounting plate are respectively connected to the corresponding piston rod extension ends, the inner side of the rotating mounting plate is hinged to one end of the hydraulic push rod one, and the hydraulic pressure The other end of the push rod 1 is hinged to the bottom of the support platform, and the outer side of the rotating mounting plate is fixed with a fixing part 2, and the fixing part 2 is hinged with one end of the hydraulic push rod 2, and the other end of the hydraulic push rod 2 Hinged to the middle of the other side templates outside the uppermost side template, the hydraulic push rods 2 can be multiple and arranged sequentially from top to bottom, corresponding to other side templates outside the uppermost side template.

Preferably, the connection between the upper template and the side panel has a step structure, the steps of the step structure on the upper side face inward, the steps of the step structure on the lower side face outward, and the steps of the step structure facing inward face Threaded holes are provided, and through holes are provided on the outwardly facing step surface. Adjacent step structures are connected by fixing bolts vertically penetrating through the corresponding step surfaces. gasket.

Preferably, the connection structure connected between the side templates includes hinge one and hinge two, and the hinge one is arranged on the side template on the lower side and includes a mounting plate one, an L-shaped connector, a sliding square The first mounting part is fixedly connected with a sliding square bar through an L-shaped connector, and the two end faces of the sliding square bar are fixed with protruding pivots; the second hinge is arranged on the upper The side formwork on the side includes the second installation plate, a guide plate, a pair of side guide strips and a pair of shaft chute, and the guide plate, the side guide strips and the shaft chute are vertically installed on the installation plate On the second part, an open chute is formed between the guide plate and the side guide bar, the two ends of the sliding square bar are slidably matched with the open chute, and the pivot is slidably matched with the shaft chute.

The advantage of the present invention is that: in this solution, since the connection between the side formwork and the upper formwork adopts a horizontally spliced step structure, the horizontal expansion of the hydraulic push rod four and the telescopic screw rod can realize the connection between the upper formwork and the side formwork. Positioning, after the end of the upper formwork is fixed by the telescopic screw, the end of the upper formwork corresponding to the end of the side formwork can be accurately spliced together through the hydraulic push rod to ensure reliable positioning. After the upper formwork is combined, the section remains unchanged The bottom can be raised and lowered with the lifting mechanism of the mast structure as a whole, and when the left and right positions of the trolley are accurate, it can ensure the accurate positioning of the upper formwork. The side support structure and the rotating support structure together provide positioning support for the side formwork. When the side support structure shrinks, the height of the upper end of the uppermost side formwork remains unchanged. The push rod two also packs up other side formworks, and through the contraction of the hydraulic push rod one, it drives the rotating support structure and the side formworks connected to it to fold upwards inwardly, reducing the space occupied by the up and down directions of the side formworks after being packed up. At this time, the gantry structure can shrink left and right and move up and down when the side formwork is put away, and the change of this lifting and left and right movement does not affect the distance between the upper formwork, each side formwork, and the upper formwork to the side formwork. Connection positioning. The disadvantages of the prior art presented by the present application are thus overcome.

In addition, since the trolley can be further shrunk left and right to reduce the occupied space after the side formwork is put away, the trolley disclosed in the present application can even be separated from the trolley through a support structure such as a screw rod after the front formwork is assembled. After the support is completed, the trolley will carry another formwork installation plate and shrink the parts of the trolley so that there is no contact between the carried formwork group and the supported formwork group, so that the supported formwork group will The support construction of the next formwork group is carried out in front, and the passing formwork group is poured, so that the pouring construction and support construction of the front and rear sections can be carried out at the same time, and the construction efficiency is improved.

Description of drawings

Fig. 1 is a structural schematic view of a trolley used for excavating a high-speed railway tunnel according to the present invention when the formwork is installed.

Fig. 2 is a structural schematic view of the present invention when the lower side formwork is removed.

Fig. 3 is a structural schematic diagram of the present invention when each side formwork is removed.

Fig. 4 is a schematic diagram of the structure of the present invention when the height of the support platform is lowered after the templates are removed.

Fig. 5 is a structural schematic diagram of a section of formwork group in the present invention when it is not supported by a trolley before pouring.

Fig. 6 is a structural schematic diagram of the connection structure between adjacent side templates in the present invention.

FIG. 7 is a schematic diagram of a partial structure after adjacent side templates are connected in the structure shown in FIG. 5 .

FIG. 8 is an enlarged view of area A in the structure shown in FIG. 7 .

The marks in the accompanying drawings are: 1, upper formwork, 2, side formwork, 21, connection structure, 211, mounting plate one, 212, L-shaped connector, 213, sliding square bar, 214, pivot, 215, guide Plate, 216, shaft chute, 217, U-shaped structure, 218, side guide bar, 219, mounting plate two, 22, fixing bolt, 23, supporting screw rod, 24, gasket, 3, supporting platform, 4 , gantry structure, 401, running mechanism, 402, lower longitudinal beam, 403, supporting column, 404, lifting hydraulic cylinder, 405, piston rod extension end, 406, upper fixing plate, 407, gantry platen, 408, upper Longitudinal beam, 409, telescopic hydraulic push rod, 5, support device, 501, hydraulic push rod five, 502, telescopic screw rod, 503, hydraulic push rod four, 504, hydraulic push rod three, 505, side mounting plate, 506 , fixed part one, 507, hydraulic push rod two, 508, fixed part two, 509, rotating mounting plate, 510, hydraulic push rod one.

Detailed ways

The specific embodiments of the present invention will be further described in detail by describing the embodiments below with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

As shown in Figures 1-8, the present invention provides a trolley for high-speed rail tunnel excavation, including a retractable portal frame structure 4, a support device 5, and a support platform 3 installed on the portal frame. The frame structure 4 is arranged on the front and rear parts of the support platform 3, the support device 5 is arranged between the portal frame structures 4, and the support device 5 includes an upper support installed on the support platform 3. structure, the side support structure and the rotation support structure installed on the side of the door frame structure 4, the side support structure and the rotation support structure can move with the expansion and contraction of the wooden frame structure in the left and right direction, the The rotating support structure is installed on the side of the door frame structure 4 through a rotating mounting plate 509, and the rotating shaft of the rotating mounting plate 509 is arranged in the front and rear directions. The first hydraulic push rod 510 between the plates 509 and the second hydraulic push rod 507 connected to the side formwork 2, the side support structure includes a laterally arranged hydraulic push rod three 504, a horizontally telescopic hydraulic push rod four 503 and telescopic wires Rod 502, the upper support structure includes a number of hydraulic push rods 501 connected to 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, and one end of the hydraulic push rod 4 503 Connect to the upper end of the side template 2.

There are at least two side templates 2 on one side, and the adjacent side templates 2 are connected by a rotatable connection structure 21. The side support structure and the rotation support structure can drive the side template 2 to rotate and fold, so The connection between the side formwork 2 and the upper formwork 1 is a stepped structure that is spliced and matched horizontally. In the above scheme, after the telescopic screw rod 502 fixes the end of the upper formwork 1, the end of the upper formwork 1 corresponding to the end of the side formwork 2 can be accurately spliced together through the hydraulic push rod 4 503 to ensure reliable positioning. The side support structure and the rotating support structure jointly position and support the side formwork 2. When the side support structure shrinks, the height of the upper end of the uppermost side formwork 2 remains unchanged, and the rotating support structure and the side support structure are simultaneously retracted inwardly. When the side formwork 2 is lifted, the position between the side formworks 2 connected by the rotatable connection structure 21 can still maintain the corresponding position when the above-mentioned support structure is stretched, so as to realize the preliminary positioning of the side formwork 2 .

The gantry structure 4 includes a left-right symmetrical door side assembly and a walking mechanism 401, the door side assembly includes a support column 403, a lifting hydraulic cylinder 404 installed vertically on the upper end of the support column 403, and the lifting The piston rod extension end 405 of the hydraulic cylinder 404 is fixedly connected to the upper fixed plate 406, the gantry platform 407 that is horizontally arranged and fixed on the upper fixed plate 406, and the walking mechanism 401 is installed on the lower end of the supporting column 403 and After unlocking, it can rotate around the center of the support column 403. The lower parts of the support column 403 on the front and rear sides are connected by the lower longitudinal beam 402, and the piston rod extension ends 405 on the front and rear sides are connected by the upper longitudinal beam 408. The gantry platform 407 is connected with the support platform 3 through a horizontal telescopic structure.

The horizontal telescopic structure includes horizontal telescopic grooves arranged on the front and rear sides of the support platform 3, a part of the portal platform is slidably inserted into the horizontal telescopic groove, and the upper and lower sides of the horizontal telescopic groove are It is connected with the gantry platform through balls or rollers, and the bottoms of the front and rear sides of the support platform 3 are connected with telescopic hydraulic push rods 409 arranged symmetrically, and one end of the telescopic hydraulic push rods 409 is connected to the support The bottom of the platform 3 and the other end are connected to the telescopic mounting plate, the telescopic mounting plate is vertically arranged and the upper end is fixedly connected to the telescopic end of the piston rod. The front and rear ends of the gantry platform 407 are provided with extensions corresponding to the horizontal telescopic grooves extending into the front and rear parts, and the part between the extensions is fixedly provided with a vertical plate on the side, and the screw rod in the side support structure That is, it is vertically fixed on the outside of the vertical board. In this way, the gantry platform 407 can move horizontally relative to the support platform 3 to achieve horizontal expansion, and the telescopic hydraulic push rod 409 forms a triangular diagonal brace with the telescopic installation plate and the support platform 3, and the drive of the telescopic hydraulic push rod 409 can allow the door side components to be relatively supported. The platform 3 moves left and right, and the direction of the traveling mechanism 401 is adjusted so that the traveling wheels can move laterally before moving, and then the left and right expansion and contraction of the portal structure 4 can be realized through the telescopic hydraulic push rod 409 .

The side support structure includes a side mounting plate 505 that is longitudinally arranged and whose two ends are fixed on the top of the door frame structures 4 on the front and rear sides. One end of the hydraulic push rod three 504, the other end of the hydraulic push rod three 504 is hinged in the middle of the uppermost side formwork 2, one end of the hydraulic push rod four 503 is fixed on the upper fixing plate 406 and is horizontal Horizontally arranged, the other end of the hydraulic push rod 4 503 is hinged to the upper end of the uppermost side formwork 2 , and the telescopic screw rod 502 protruding horizontally and laterally is fixedly installed on the gantry platform 407 . In this way, the expansion and contraction of the two hydraulic push rods of the side support structure does not change the height of the upper end of the uppermost side formwork 2, which facilitates splicing with the left and right ends of the upper formwork 1 fixed by the telescopic screw rod 502.

The rotating support structure also includes that the two ends of the rotating shaft on the upper side of the rotating mounting plate 509 are respectively connected to the corresponding piston rod extension ends 405, and the inner side of the rotating mounting plate 509 is hinged to one end of the hydraulic push rod one 510. The other end of the hydraulic push rod 1 510 is hinged to the bottom of the support platform 3, and the outside of the rotating mounting plate 509 is fixed with a fixing part 2 508, and the fixing part 2 508 is hinged with one end of the hydraulic push rod 2 507. The other end of the push rod 2 507 is hinged to the middle of the other side formwork 2 outside the uppermost side formwork 2. There may be multiple hydraulic push rods 2 507 and they are arranged sequentially from top to bottom, corresponding to the uppermost side formwork 2. The other side template 2. The side formwork 2 can be folded up by rotating the supporting structure, and the hinged side formwork 2 can be further rotated inward by rotating the mounting plate 509, thereby reducing the space occupied in the up and down direction and facilitating the movement of the trolley. Elevation changes.

The upper support structure includes at least two hydraulic push rods five 501, which are used to support the upper template 1, and when there are more than one upper template 1, there are at least three hydraulic push rods five 501, so The upper end of the hydraulic push rod 501 is hinged to the corresponding upper template 1 and the other end is hinged to the support platform 3 .

The connection between the upper formwork 1 and the side panels has a step structure, the steps of the step structure on the upper side face inward, the steps of the step structure on the lower side face outward, and the step surface facing inward is provided with Threaded holes, through holes are provided on the outwardly facing step surface, and the adjacent step structures are connected by fixing bolts 22 vertically penetrating the corresponding step surfaces, and the fixing bolts 22 perpendicular to the fixing bolts 22 are arranged between the adjacent step surfaces. The sealing gasket 24 prevents the joint from leaking. After assembly, this structure has reliable connection and good leakage resistance, and is suitable for mobile splicing.

The connection structure 21 connected between the side templates 2 includes a hinge part one and a hinge part two, and the hinge part one is arranged on the side template 2 on the lower side and includes a mounting plate part one 211, an L-shaped connector, a sliding Square bar 213 and pivot 214, described installation part one is fixedly connected with sliding square bar 213 by L-shaped connector, and the two end faces of described sliding square bar 213 are fixed with the described pivot 214 that protrudes; Part two is located on the side template 2 on the upper side and includes a mounting plate part two 219, a guide plate 215, a pair of side guide strips 218 and a pair of shaft chute 216, the guide plate 215, the side guide strips 218 and The shaft chute 216 is installed vertically on the second mounting plate 219, an opening chute is formed between the guide plate 215 and the side guide bar 218, and the two ends of the sliding square bar 213 are connected to the opening. The chute is slidably matched, the pivot 214 is slidably matched with the shaft chute 216, and a gap for the L-shaped connector to pass is reserved between a pair of side guide bars 218, and the upper end of the shaft chute 216 is as high as A closed U-shaped structure is formed at the upper end of the open chute, and 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.

The upper edge of the sliding square bar 213 on the side of the guide plate 215 is a rounded part, and the rounded part does not interfere with the upper end of the guide plate 215 when the pivot 214 rotates inward. can rotate freely, and the lower side edge of the sliding square bar 213 on the side of the guide plate 215 is a right-angle part, and the right-angle part can abut against the guide plate when the pivot 214 rotates outward 215, so that the sliding square bar 213 is limited, and when the templates are installed, the side templates 2 are first rotated and then moved along the opening chute for splicing. This not only ensures that the templates can be spliced and connected through the step structure with good leakage resistance, avoids the leakage problem caused by the excessive gap at the hinge or the wear of the rotating shaft in the conventional hinged connection structure 21, but also maintains the disassembled side template. 2 are hingedly connected to each other for portability, and the connection position and relationship can be restored when the formwork is installed.

During the use of the present invention, the height and width are first adjusted to adapt to the section of the tunnel. When the width is adjusted, the traveling mechanism 401 rotates to a state capable of lateral movement, and then the telescopic hydraulic push rod 409 drives the door side components on both sides to move symmetrically left and right. Implements width adjustments. After the width is adjusted, the height of the support platform 3 is adjusted through the lifting hydraulic cylinder 404 . After the adjustment is completed, the corresponding formwork is connected to each hydraulic push rod, and the formwork is pushed and pressed to the wall of the tunnel through the hydraulic push rod. The construction workers operate on the supporting platform 3 and the gantry platform 407 to position and connect the upper template 1 . In this embodiment, the upper template 1 includes the middle upper template 1 and the side upper templates 1 on both sides. The upper templates 1 are spliced by matching step structures, and the splicing part passes through the lower side step structure and the gasket 24 The fixing bolts 22 are tightly fixed, and the left end or the right end of the upper formwork 1 on the side is fixedly connected with 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 supporting structure. Only when the door side assembly is retracted left and right while maintaining the support of the upper formwork 1, the telescopic screw mandrel 502 is only removed to support the upper formwork 1 by the hydraulic push rod 501 on the support platform 3.

While the telescopic screw rod 502 is connected to the end of the upper formwork 1, the side support structure and the rotating support structure also effectively support the side formwork 2. When the formwork needs to be removed, the corresponding forms are removed one by one through the rotating support structure from bottom to top. The side formwork 2 on the side, the hydraulic push rod 2 507 shrinks to drive the side formwork 2 on the lower side to retract. Since the side formwork 2 is also spliced by a matching step structure, when retracting, it first moves inward along the opening chute. Sliding, when the pivot 214 enters the U-shaped structure, the side template 2 on the lower side is allowed to rotate and retract. The retracted lower side formwork 2 is close to the rotating mounting plate 509, while the uppermost side formwork 2 is close to the side mounting plate 505 and the height of the upper end remains unchanged. Finally, the hydraulic push rod 1 510 shrinks, and the rotating mounting plate 509 and the side formwork 2 connected thereto are rotated inwardly, thereby leaving a large space between the side formwork 2 and the ground after rotation, which is convenient for the door frame structure 4 drop contraction.

In the case of carrying the mold, the structure of the trolley can still realize the left and right movement of the door side components and the connected formwork, and can also realize the lifting movement of the support platform 3 and the connected upper formwork 1, and the related movement process does not affect the relationship between the side formwork 2 The upper formwork 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 formwork 1 and the upper end of the side formwork 2, so the horizontal movement can be maintained when the support is restored. Accurate splicing effect, so this scheme can realize the lifting and shrinking of the trolley to adapt to tunnels of different cross-section sizes, and at the same time, realize the preliminary positioning splicing effect after formwork removal and formwork installation through the trolley structure, which improves the efficiency of formwork installation. In addition, since the shrinkage effect caused by the above-mentioned lifting and moving left and right does not affect the restoration of the mold position, the corresponding formwork can be gathered and carried through the tunnel pouring section after the formwork is installed, and the side formwork 2 of the pouring section is passed through the support. The supporting screw rod 23 is supported, and the side formwork 2 and the adjacent upper formwork 1 are also supported by the supporting screw rod 23 . While pouring the tunnel pouring section of the previous section, formwork installation and support construction is carried out for the next section, thereby improving the overall construction efficiency.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as various insubstantial improvements are made by adopting the inventive concepts and technical solutions of the present invention, or without improvement Directly applying the concept and technical solutions of the present invention to other occasions falls within the protection scope of the present invention.

Claims (8)

1. The utility model provides a platform truck that high-speed railway tunnel excavated usefulness which characterized in that: the hydraulic telescopic support device comprises a telescopic portal structure (4), a support device (5) and a support platform (3) arranged on a portal, wherein the portal structure (4) is arranged on the front and rear parts of the support platform (3), the support device (5) is arranged between the portal structure (4), the support device (5) comprises an upper support structure arranged on the support platform (3), a side support structure arranged on the side surface of the portal structure (4) and a rotary support structure, the side support structure and the rotary support structure can move along with the left and right direction of the wood frame structure in a telescopic manner, the rotary support structure is arranged on the side surface of the portal structure (4) through a rotary mounting plate (509), a rotating shaft of the rotary mounting plate (509) is arranged in the front and rear direction, the rotary support structure comprises a first hydraulic push rod (510) connected between the support platform (3) and the rotary mounting plate (509) and a second hydraulic push rod (507) connected with a side template (2), the side support structure comprises a third hydraulic push rod (504) arranged laterally, a fourth hydraulic push rod (503) connected with the first hydraulic push rod (502) and the second hydraulic push rod (502) connected with the first hydraulic push rod (502) fixedly connected with the telescopic guide rods (502), one end of the hydraulic push rod IV (503) is connected to the upper end of the side template (2).

2. The trolley for high-speed railway tunnel excavation according to claim 1, wherein: at least two side templates (2) are arranged on one side, the adjacent side templates (2) are connected through a rotatable connecting structure (21), the side supporting structure and the rotatable supporting structure can drive the side templates (2) to rotate and fold, and the connecting part of the side templates (2) and the upper template (1) is of a step structure matched with the connecting part in a horizontal splicing mode.

3. The trolley for high-speed railway tunnel excavation according to claim 1, wherein: portal structure (4) are including door side subassembly and running gear (401) that bilateral symmetry set up, door side subassembly includes support post (403), installs lift pneumatic cylinder (404) of vertical setting in support post (403) upper end, with go up fixed plate (406) that piston rod of lift pneumatic cylinder (404) stretches out end (405) fixed connection, level setting and fix portal platen (407) on last fixed plate (406), running gear (401) are installed support post (403) lower extreme and can use after the unblock support post (403) center is the axle rotation, connect through lower longeron (402) between support post (403) lower part of front and back both sides, connect through last longeron (408) between piston rod that front and back both sides stretches out end (405), portal (407) with supporting platform (3) pass through horizontal telescopic structure and link to each other.

4. A trolley for high-speed railway tunnel excavation according to claim 3, wherein: the horizontal telescopic structure comprises horizontal telescopic grooves formed in the front side and the rear side of the supporting platform (3), a part of the portal platform is inserted into the horizontal telescopic grooves in a sliding mode, telescopic hydraulic pushing rods (409) which are symmetrically arranged are connected to the bottoms of the front side and the rear side of the supporting platform (3), one end of each telescopic hydraulic pushing rod (409) is connected to the bottom of the supporting platform (3), the other end of each telescopic hydraulic pushing rod is connected to a telescopic mounting plate, and the telescopic mounting plates are vertically arranged, the upper ends of the telescopic mounting plates are fixedly connected with the telescopic ends of the piston rods.

5. The trolley for high-speed railway tunnel excavation according to claim 1, wherein: the side supporting structure comprises side mounting plates (505) which are longitudinally arranged and are fixed at the upper parts of front and rear side portal structures (4), a first fixing piece (506) is fixed on the side mounting plates (505), one end of a third hydraulic push rod (504) is hinged to the first fixing piece (506), the other end of the third hydraulic push rod (504) is hinged to the middle part of a side template (2) at the uppermost side, one end of a fourth hydraulic push rod (503) is fixed to the upper fixing plate (406) and horizontally and transversely arranged, the other end of the fourth hydraulic push rod (503) is hinged to the upper end of the side template (2) at the uppermost side, and a telescopic screw rod (502) horizontally and transversely stretched out is fixedly arranged on the portal (407).

6. The trolley for high-speed railway tunnel excavation according to claim 1, wherein: the rotary supporting structure further comprises a rotary shaft with two ends connected to corresponding piston rod extending ends (405) respectively, the inner side of the rotary mounting plate (509) is hinged to one end of a first hydraulic push rod (510), the other end of the first hydraulic push rod (510) is hinged to the bottom of the supporting platform (3), a second fixing piece (508) is fixed to the outer side of the rotary mounting plate (509), the second fixing piece (508) is hinged to one end of the second hydraulic push rod (507), the other end of the second hydraulic push rod (507) is hinged to the middle of other side templates (2) outside the uppermost side template (2), and the second hydraulic push rod (507) can be multiple and sequentially arranged from top to bottom and corresponds to the other side templates (2) outside the uppermost side template (2).

7. The trolley for high-speed railway tunnel excavation according to claim 2, wherein: the connecting parts of the upper template (1) and the side panels are respectively provided with a step structure, the step surface of the step structure near the upper side faces inwards, the step surface of the step structure near the lower side faces outwards, threaded holes are formed in the inwards-facing step surface, through holes are formed in the outwards-facing step surface, adjacent step structures are connected through fixing bolts (22) which vertically penetrate through the corresponding step surfaces, and sealing gaskets (24) perpendicular to the fixing bolts (22) are arranged between the adjacent step surfaces.

8. The trolley for high-speed railway tunnel excavation according to claim 2, wherein: the connecting structure (21) connected between the side templates (2) comprises a first hinge part and a second hinge part, wherein the first hinge part is arranged on the side template (2) close to the lower side and comprises a first mounting plate (211), an L-shaped connecting part, a sliding square bar (213) and a pivot (214), the first mounting part is fixedly connected with the sliding square bar (213) through the L-shaped connecting part, and the two end faces of the sliding square bar (213) are fixedly provided with the pivot (214) which stretches out; the hinge piece II is arranged on the side template (2) close to the upper side and comprises a mounting plate II (219), a guide plate (215), a pair of side guide strips (218) and a pair of shaft sliding grooves (216), the guide plate (215), the side guide strips (218) and the shaft sliding grooves (216) are vertically arranged on the mounting plate II (219), an opening sliding groove is formed between the guide plate (215) and the side guide strips (218), two ends of the sliding square strip (213) are in sliding fit with the opening sliding groove, and the pivot (214) is in sliding fit with the shaft sliding grooves (216).

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