Formwork support sliding assembly for underground comprehensive pipe gallery construction and construction method

Abstract

The invention relates to the technical field of building construction, in particular to a formwork support sliding assembly for underground comprehensive pipe gallery construction and a construction method.The formwork support sliding assembly for underground comprehensive pipe gallery construction comprises an inner formwork trolley, an outer formwork trolley, a sliding rail component and a formwork system, and walking wheels are arranged at the bottom of the inner formwork trolley and the bottom of the outer formwork trolley; the formwork system comprises an inner wall formwork, an outer wall formwork and a top face formwork. Each inner formwork trolley comprises a portal and a hydraulic oil cylinder, a top supporting rod is further arranged between the inner wall formworks, horizontal pull rods are arranged between the outer formwork trolleys on the left side and the right side of the pipe gallery structure, each outer formwork trolley comprises a bearing frame body and a plurality of anchoring screw rods, and a fixing sleeve is arranged at the bottom of each bearing frame body. Limiting holes are further formed in the positions, corresponding to the fixing sleeves, of the pipe gallery bottom plate, and the anchoring screws extend into the limiting holes. By the adoption of the structural arrangement, it can be avoided that screw holes are left in the side wall structure of the pipe gallery, and the risk of leakage occurring in later use of the pipe gallery is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a sliding assembly and construction method for a formwork support for underground utility tunnel construction. Background Art

[0002] A formwork trolley is a movable formwork support device used for long and narrow structures such as tunnels or utility tunnels, where the cross-section of the reinforced concrete is identical. Its purpose is to replace traditional formwork supports, using standardized formwork equipment to erect the formwork in one go for reinforcement binding and concrete pouring. In cast-in-place underground utility tunnel concrete structures, steel or aluminum formwork is typically used as the formwork trolley structure system.

[0003] For example, Chinese invention patent application number CN202210916751.2 discloses a self-propelled steel formwork trolley for integrated utility tunnel construction, which includes an inner formwork trolley located inside the utility tunnel and an outer formwork located outside the utility tunnel. The inner formwork trolley includes a gantry, a traveling mechanism supported at the gantry feet, an inner formwork track arranged below the traveling mechanism, inner formwork assemblies installed on the top and sides of the gantry, and an inner formwork screw support mechanism connecting the gantry and the inner formwork assemblies. The gantry feet are respectively fixedly connected to the outside of the longitudinal beams of the gantry. A jack is fixedly installed at the bottom of the gantry, opposite to the inner formwork track, and the lower end of the jack is fixedly connected to a slot that matches the inner formwork track. The outer formwork of the utility tunnel adopts an all-steel large formwork structure. A reaction frame is fixedly connected to the back of the outer formwork of the utility tunnel, and two opposing reaction frames on both sides are connected by an external screw. The lower part of the outer formwork of the utility tunnel is connected to the side wall of the utility tunnel by an external formwork support screw, which penetrates through the side wall of the utility tunnel. The above technical solution utilizes screw adjustment to control the formwork placement within the pipe gallery. When the gantry is lowered, the lower end of the jack engages with the inner formwork track, improving stability. The use of a formwork trolley for overall pouring and transfer enables rapid formwork turnover and sequential advancement. This solution employs mechanized, streamlined operations for formwork placement, concrete pouring, and demolding, saving time on formwork handling, assembly, and support compared to traditional combined formwork. Based on a standard 30-meter section, the traditional assembly of combined steel formwork and scaffolding erection takes 4-5 days, while this solution requires only half a day. The use of the steel formwork trolley significantly shortens the construction time for scaffolding erection and formwork support. However, shortcomings remain, as detailed below: In actual use, the formwork trolley with the above-mentioned structure uses threaded rods that penetrate the side walls of the utility tunnel to fix the outer formwork, thus preventing bulging of the formwork during concrete pouring. However, this structural setup results in through-holes in the side walls of the utility tunnel after the concrete has set. This increases the workload of sealing these holes later and also compromises the overall integrity of the utility tunnel, affecting its waterproofing performance and increasing the risk of leakage during later use.

[0004] Therefore, in the construction of utility tunnels using formwork trolleys, how to avoid leaving bolt holes in the side wall structure of the utility tunnel is a technical problem that urgently needs to be solved in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to address the problem in existing technologies where external formwork for utility tunnels is fixed using threaded rods that penetrate the side walls of the tunnel to prevent formwork bulging during concrete pouring. However, this structural design results in through-holes in the side walls of the tunnel after the concrete has set. This increases the workload of sealing these holes and compromises the overall integrity of the utility tunnel, affecting its waterproofing performance and increasing the risk of leakage during later use. The invention provides a sliding component for formwork support and a construction method for underground integrated utility tunnels.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A sliding assembly for formwork supports in the construction of underground utility tunnels includes an inner formwork trolley, an outer formwork trolley, a sliding rail component, and a formwork system. The inner formwork trolley is installed inside the cavity of the utility tunnel, and the outer formwork trolley is installed on the left and right sides of the utility tunnel. The slide rail component is installed on the bottom plate of the pipe gallery structure and is arranged in the direction of the pipe gallery's extension. The slide rail component includes an inner slide rail and an outer slide rail. The inner slide rail is installed in the area of ​​the pipe gallery bottom plate corresponding to the inner mold trolley, and the outer slide rail is installed in the area of ​​the pipe gallery bottom plate corresponding to the outer mold trolley. The bottom of the inner mold trolley and the outer mold trolley are provided with traveling wheels. Applying a pushing / pulling force to the inner mold trolley and the outer mold trolley can move the inner mold trolley and the outer mold trolley along the slide rail component. The template system includes an inner wall template, an outer wall template, and a top template. The outer wall template is mounted on the outer template trolley and corresponds to the outer surface of the pipe gallery side wall. The inner wall template and the top template are mounted on the inner template trolley. The inner wall template and the top template are an integral structure. The inner wall template corresponds to the inner surface of the pipe gallery side wall, and the top template corresponds to the top surface of the pipe gallery structure. The inner wall template, the outer wall template, and the top template cooperate with each other to form the casting cavity of the pipe gallery structure. The inner mold trolley includes a gantry and a hydraulic cylinder. The traveling wheels are located at the bottom of the gantry, and the hydraulic cylinder is located at the top of the gantry. The top template is connected to the hydraulic cylinder. The hydraulic cylinder is used to adjust the gap width between the top template and the top of the gantry. A top support rod is also provided between the inner wall templates. The top support rod is used to maintain the gap width between the inner wall templates. A horizontal tie rod is provided between the outer formwork trolleys on the left and right sides of the pipe gallery structure. The horizontal tie rod is connected to the top of the outer formwork trolley and is used to maintain the spacing between the outer formwork trolleys on the left and right sides of the pipe gallery. The outer formwork trolley includes a support frame and several anchor bolts. The outer wall formwork is connected to the support frame. A fixing sleeve is provided at the bottom of the support frame. The fixing sleeve is set perpendicular to the bottom plate of the pipe gallery. The inner diameter of the fixing sleeve matches the outer diameter of the anchor bolt. The anchor bolt passes through the fixing sleeve and can slide inside the fixing sleeve. A limiting hole is also provided at the position of the fixing sleeve on the bottom plate of the pipe gallery. The diameter of the limiting hole matches the diameter of the anchor bolt. The limiting hole is used for the anchor bolt to extend into. After the anchor bolt extends into the limiting hole, the end of the anchor bolt away from the bottom plate of the pipe gallery extends beyond the top of the fixing sleeve.

[0007] Preferably, the anchoring screw is further provided with an adjusting bolt, which is threadedly connected to the anchoring screw. The adjusting bolt is provided at both ends of the fixing sleeve. By turning the adjusting bolt to abut against both ends of the fixing sleeve, the anchoring screw can be fixed.

[0008] Preferably, a corner template is provided between the top template and the inner wall template, and the corner template forms an obtuse angle fit with the top template and the inner wall template.

[0009] Preferably, the inner wall template and the corner template are rotatably connected, and the rotation direction of the inner wall template is towards one side of the gantry; a hydraulic brace is also provided between the inner wall template and the top template, and the hydraulic brace can extend or shorten as the inner wall template rotates.

[0010] Preferably, a first fixing seat is provided on one side of the inner wall template, and a snap-fit ​​groove is provided on the other side of the inner wall template. One end of the top support rod is connected to the first fixing seat, and the other end extends into the snap-fit ​​groove. A rubber friction head is also provided on the end of the top support rod corresponding to the snap-fit ​​groove. The top support rod and the first fixing seat are rotatably connected, and the snap-fit ​​groove restricts the top support rod to rotate only within the width of its groove. The snap-fit ​​groove is divided into a first groove area and a second groove area along the vertical direction of the inner wall template. When the end of the top support rod is located in the first groove area, the rubber friction head abuts against the bottom of the groove in the first groove area; when the end of the top support rod is located in the second groove area, the rubber friction head is spaced from the bottom of the groove in the second groove area.

[0011] Preferably, the second groove area is located below the first groove area.

[0012] Preferably, the top support rod is provided in two rows, one of which is located on one side of the top template and the other is located on the bottom plate of the pipe gallery. The first fixing seat for fixing the two top support rods is respectively located on the inner wall template on the left and right sides.

[0013] Preferably, the inner slide rail includes a support plate and an inner track disposed on the support plate. The support plate is fixed to the bottom plate of the pipe gallery. A second fixing seat is also provided at the bottom of the inner wall template. A diagonal brace is rotatably connected to the second fixing seat. The length of the diagonal brace is adjustable. A limiting groove is also provided on the support plate. The limiting groove is used to accommodate the end of the diagonal brace.

[0014] Preferably, the inner wall formwork is composed of multiple inner formwork units, and adjacent inner formwork units are connected as a whole by pins and tabs. Each inner formwork unit includes a first inner wall panel and a second inner wall panel. The first inner wall panel is connected to the corner formwork, and the second inner wall panel is connected to the first inner wall panel. The connection point between the first and second inner wall panels is located in the top area of ​​the guide wall integrally formed with the pipe gallery floor slab. The second fixing seat is disposed on the second inner wall panel. The first inner wall panel has a slider at one end, and the second inner wall panel has a groove at one end. The central axis of the groove is perpendicular to the central axis of the top surface of the guide wall integrally formed with the pipe gallery floor slab, and there is a gap between the two ends of the groove and the edge line of the second inner wall panel section. The slider is engaged in the groove. By striking the first inner wall panel, pressure is applied to the bottom edge of the first inner wall panel on the edge of the top area of ​​the guide wall integrally formed with the bottom plate of the pipe gallery. Under the pressure, the concrete in this area can be broken, and then the end of the first inner wall panel slides a certain distance into the side wall of the pipe gallery.

[0015] A construction method for a sliding assembly of a formwork support for underground utility tunnel construction includes the following steps: A. Construction of the base slab and guide wall of the utility tunnel: pour the base slab and guide wall of the utility tunnel to form the working plane of the formwork trolley; B. Install the template support sliding assembly: Install the inner mold trolley and the outer mold trolley on the foundation of the pipe gallery bottom plate and guide wall formed in step A to form the casting cavity of the pipe gallery side wall and top plate. C. Adjust the fixed position of the inner wall formwork: After the formwork support sliding assembly is installed, adjust the fixed position of the inner wall formwork so that the concrete contact surface of the inner wall formwork coincides with the edge line of the side wall of the pipe gallery to be poured. D. Pouring concrete for the side walls and top slab of the utility tunnel: Pouring concrete for the side walls and top slab of the utility tunnel to enclose and shape the utility tunnel structure. E. Formwork trolley demolding and turnover: After the side walls and top slab of the pipe gallery reach the design strength in step D, the inner formwork trolley and the outer formwork trolley are demolded and slid to the next construction section.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention discloses a sliding assembly for a formwork support for underground utility tunnel construction. The top support rods installed between the inner wall formwork sections maintain the spacing between them. Horizontal tie rods are installed between the outer formwork trolleys on both sides of the utility tunnel structure, and anchor bolts are installed at the bottom of the support frame to cooperate with the limiting holes. This maintains the spacing between the outer formwork trolleys on both sides of the utility tunnel. Thus, during the concrete pouring of the utility tunnel, it effectively prevents bulging and displacement of the inner and outer wall formwork sections, thereby ensuring the quality of the concrete forming. Furthermore, this structural design avoids leaving bolt holes in the side wall structure of the utility tunnel, ensuring the integrity of the structure and effectively reducing the risk of leakage during later use. 2. The sliding assembly of a formwork support for underground integrated pipe gallery construction according to the present invention includes a first fixed seat on one side of the inner wall formwork and a snap-fit ​​groove on the other side of the inner wall formwork. One end of a top support rod is connected to the first fixed seat, and the other end extends into the snap-fit ​​groove. A rubber friction head is also provided at the end of the top support rod corresponding to the snap-fit ​​groove. The top support rod and the first fixed seat are rotatably connected, and the snap-fit ​​groove restricts the top support rod to rotate only within its groove width. The snap-fit ​​groove is divided into a first groove area and a second groove area along the vertical direction of the inner wall formwork. When the end of the top support rod is located in the first groove area, the rubber friction head... The bottoms of the first groove area abut against each other; when the end of the top support rod is located in the second groove area, the rubber friction head forms a gap with the bottom of the second groove area; this structural arrangement makes the installation and disassembly of the top support rod more convenient, thereby improving the convenience of the invention in actual use; on the other hand, during the demolding operation of the inner wall formwork, the end of the top support rod can be adjusted into the second groove area, and then the top support rod can be rotated so that its end hits the side wall of the second groove area. In this way, the inner wall formwork can be more thoroughly separated from the concrete surface under the impact force generated by the impact of the two, thereby further improving the practicality of the invention in actual construction use; 3. The present invention provides a sliding assembly for a formwork support in the construction of an underground integrated utility tunnel. The inner wall formwork is composed of multiple inner formwork units, adjacent of which are connected as a whole by pins and tabs. Each inner formwork unit includes a first inner wall panel and a second inner wall panel. The first inner wall panel is connected to the corner formwork, and the second inner wall panel is connected to the first inner wall panel. The connection point between the first and second inner wall panels is located at the top area of ​​the guide wall integrally formed with the tunnel floor slab. A second fixing seat is disposed on the second inner wall panel. The first inner wall panel is provided with a slider at its end, and the second inner wall panel is provided with a groove at its end. The central axis of the groove is perpendicular to the central axis of the top surface of the guide wall integrally formed with the bottom plate of the pipe gallery. The two ends of the groove are spaced apart from the edge line of the cross section of the second inner wall panel. The slider is engaged in the groove. When the first inner wall panel is struck, pressure is applied to the bottom edge of the first inner wall panel on the edge of the top area of ​​the guide wall integrally formed with the bottom plate of the pipe gallery. Under the pressure, the concrete in this area can be broken, and then the end of the first inner wall panel slides a distance into the side wall of the pipe gallery. This structural design ensures that the concrete contact surface of the first inner wall panel always coincides with the edge line of the side wall of the pipe gallery to be poured after the formwork is erected, thereby further ensuring the forming quality of the pipe gallery. Furthermore, in this embodiment, during the adjustment of the fixed position of the first inner wall panel, allowing it to slide a certain distance into the side wall area of ​​the pipe gallery, the concrete at the edge of the top area of ​​the guide wall integrally formed with the pipe gallery base plate is broken up. This allows for a more compact bonding between the old and new concrete surfaces of the pipe gallery side wall, reducing the risk of leakage in this area. Moreover, in this embodiment, the first inner wall panel... After sliding a certain distance within the side wall area of ​​the pipe gallery, a portion of the end of the first inner wall panel can abut against the already formed concrete of the pipe gallery side wall, improving the tightness of the fit between the end of the first inner wall panel and the guide wall integrally formed with the bottom plate of the pipe gallery. Thus, during the pouring construction, the total amount of concrete slurry leaking into the area of ​​the second inner wall panel can be effectively reduced. This effectively inhibits the leakage of concrete slurry into the groove, ensuring the smooth sliding fit between the first inner wall panel and the second inner wall panel, thereby further improving the practicality of the invention in actual construction. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a sliding assembly for a formwork support in the construction of an underground utility tunnel. Figure 2 yes Figure 1 A schematic diagram of the structure of A in the middle; Figure 3 yes Figure 1 A schematic diagram of the structure of B in the middle; Figure 4This is a schematic diagram of a structure for adjusting the concrete contact surface of the first inner wall panel to make it coincide with the edge line of the side wall of the pipe gallery. Figure 5 This is a schematic diagram of the cross-sectional structure of the joint between the first inner wall panel and the second inner wall panel; Figure 6 This is a flowchart illustrating a construction method for a sliding assembly of a formwork support for underground utility tunnel construction.

[0018] The diagram is labeled as follows: 1-Inner mold trolley, 2-Outer mold trolley, 3-Slide rail component, 4-Formwork system, 5-Inner wall formwork, 6-Outer wall formwork, 7-Top formwork, 8-Gantry, 9-Hydraulic cylinder, 10-Top support rod, 11-Horizontal tie rod, 12-Anchoring screw, 13-Fixing sleeve, 14-Limiting hole, 15-Adjusting bolt, 16-Half corner formwork, 17-Hydraulic diagonal brace, 18-First fixed seat, 19-Snap-fit ​​groove, 20-Rubber friction head, 21-First groove area, 22-Second groove area, 23-Inner slide rail, 24-Outer slide rail, 25-Walking wheel, 26-Bearing plate, 27-Inner rail, 28-Second fixed seat, 29-Diagonal brace, 30-Limiting groove, 31-First inner wall panel, 32-Second inner wall panel, 33-Slider, 34-Slide groove, 35-Bearing frame. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention.

[0021] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein may be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Example 1: As Figure 1 and Figure 3 As shown, the present invention discloses a sliding assembly for a formwork support in the construction of an underground utility tunnel, comprising an inner formwork trolley 1, an outer formwork trolley 2, a slide rail component 3, and a formwork system 4. The inner formwork trolley 1 is disposed within the cavity of the utility tunnel, and the outer formwork trolley 2 is disposed on the left and right sides of the utility tunnel. The slide rail component 3 is installed on the bottom plate of the pipe gallery structure and is arranged in the direction of the extension of the pipe gallery. The slide rail component 3 includes an inner slide rail 23 and an outer slide rail 24. The inner slide rail 23 is installed in the area of ​​the bottom plate of the pipe gallery corresponding to the inner mold trolley 1, and the outer slide rail 24 is installed in the area of ​​the bottom plate of the pipe gallery corresponding to the outer mold trolley 2. The bottom of the inner mold trolley 1 and the outer mold trolley 2 are provided with traveling wheels 25. Applying a pushing / pulling force to the inner mold trolley 1 and the outer mold trolley 2 can make the inner mold trolley 1 and the outer mold trolley 2 move along the slide rail component 3. The template system 4 includes an inner wall template 5, an outer wall template 6, and a top template 7. The outer wall template 6 is mounted on the outer template trolley 2 and corresponds to the outer surface of the pipe gallery side wall. The inner wall template 5 and the top template 7 are mounted on the inner template trolley 1 and are an integral structure. The inner wall template 5 corresponds to the inner surface of the pipe gallery side wall, and the top template 7 corresponds to the top surface of the pipe gallery structure. The inner wall template 5, the outer wall template 6, and the top template 7 cooperate with each other to form the casting cavity of the pipe gallery structure. The inner mold trolley 1 includes a gantry 8 and a hydraulic cylinder 9. The traveling wheels 25 are located at the bottom of the gantry 8, and the hydraulic cylinder 9 is located at the top of the gantry 8. The top template 7 is connected to the hydraulic cylinder 9. The hydraulic cylinder is used to adjust the gap width between the top template 7 and the top of the gantry 8. A top support rod 10 is also provided between the inner wall templates 5. The top support rod 10 is used to maintain the gap width between the inner wall templates 5. A horizontal tie rod 11 is provided between the outer formwork trolleys 2 on the left and right sides of the pipe gallery structure. The horizontal tie rod 11 is connected to the top of the outer formwork trolley 2 and is used to maintain the spacing between the outer formwork trolleys 2 on the left and right sides of the pipe gallery. The outer formwork trolley 2 includes a support frame 35 and several anchor bolts 12. The outer wall formwork 6 is connected to the support frame 35. A fixing sleeve 13 is provided at the bottom of the support frame 35. The fixing sleeve 13 is perpendicular to the bottom plate of the pipe gallery. The inner diameter of the fixing sleeve 13 is equal to that of the outer wall formwork 6. The outer diameter of the anchoring screw 12 is matched, the anchoring screw 12 is inserted into the fixing sleeve 13, and the anchoring screw 12 can slide within the fixing sleeve 13. A limiting hole 14 is also provided on the bottom plate of the pipe gallery corresponding to the fixing sleeve 13. The diameter of the limiting hole 14 is matched with the diameter of the anchoring screw 12. The limiting hole 14 is used for the anchoring screw 12 to extend into, and after the anchoring screw 12 extends into the limiting hole 14, the end of the anchoring screw 12 away from the bottom plate of the pipe gallery extends beyond the top of the fixing sleeve 13.

[0026] The sliding assembly of the formwork support for underground integrated utility tunnel construction described in this invention, with the top support rod 10 installed between the inner wall formwork 5, can maintain the spacing width between the inner wall formwork 5; the horizontal tie rod 11 is installed between the outer formwork trolleys 2 on the left and right sides of the utility tunnel structure, and the anchoring screw 12 is installed at the bottom of the bearing frame 35 to cooperate with the limiting hole 14, which can maintain the spacing distance between the outer formwork trolleys 2 on the left and right sides of the utility tunnel. In this way, during the concrete pouring construction of the utility tunnel, it can effectively prevent the inner wall formwork 5 and the outer wall formwork 6 from bulging and displacement, thereby ensuring the forming quality of the utility tunnel concrete; furthermore, with this structural setting, it can also avoid leaving screw holes on the side wall structure of the utility tunnel, ensuring the integrity of the utility tunnel structure and effectively reducing the risk of leakage during the later use of the utility tunnel.

[0027] Specifically, in actual construction use, this new invention applies a pulling / pushing force to the inner mold trolley 1 and the outer mold trolley 2, causing them to move along the slide rail component 3 to the pipe gallery segment to be poured. Then, the hydraulic cylinder 9 is used to lift the top template 7 to the top elevation of the pipe gallery. Afterwards, the top support rod 10 is installed between the inner wall templates 5 on both sides, thus completing the fixation of the top template 7 and the inner wall template 5. In this embodiment, an mounting base is provided on the inner wall template 5, and the end of the top support rod 10 is engaged in the mounting base to complete the installation. When fixing the outer mold trolley 2, the drill bit of the impact drill is passed through the limiting hole 14, and the limiting hole 14 is opened on the bottom plate of the pipe gallery using the impact drill. After the limiting hole 14 is opened, the anchoring screw 12 is inserted into the limiting hole 14 through the fixing sleeve 13. In this embodiment, the horizontal tie rod 11 and the outer mold trolley 2 are integrated into one structure, which can maintain the consistency of the movement of the outer mold trolley 2 on the left and right sides of the pipe gallery and improve the convenience of the movement of the outer mold trolley 2. After the concrete of the pipe gallery is poured and formed, when demolding the inner wall formwork 5 and the top formwork 7 in the cavity, first remove the top support rod 10, then control the hydraulic cylinder 9 to retract. Under the action of the hydraulic cylinder 9 applying downward force, the top formwork 7 and the inner wall formwork 5 separate from the concrete surface of the pipe gallery. Then push / pull the inner formwork trolley 1 to move it to the next pouring segment. When demolding the outer wall formwork 6, after pulling out the anchor bolt 12, use a jack to vertically lift the supporting frame 35 to separate the outer wall formwork 6 from the concrete surface of the pipe gallery. Then push / pull the inner formwork trolley 1 to move it to the next pouring segment.

[0028] It should be noted that in this embodiment, the overall structure of the utility tunnel is cast in two stages. The first stage involves casting the bottom slab structure and a portion of the side walls of the utility tunnel, while the second stage involves casting the top slab and the remaining portion of the side walls.

[0029] As a preferred embodiment, based on the above method, the anchoring screw 12 is further provided with an adjusting bolt 15. The adjusting bolt 15 is threadedly connected to the anchoring screw 12. The adjusting bolt 15 is provided at both ends of the fixing sleeve 13. Tightening the adjusting bolt 15 so that it abuts against both ends of the fixing sleeve 13 can fix the anchoring screw 12. This structural arrangement can improve the stability of the anchoring screw 12 connected to the bearing frame 35 and reduce the risk of the anchoring screw 12 accidentally coming out of the limiting hole 14 and the fixing sleeve 13 during construction.

[0030] Example 2: As Figures 1 to 3 As shown, the sliding assembly of the formwork support for underground integrated pipe gallery construction of the present invention, based on the above method, further includes a haunch corner formwork 16 between the top formwork 7 and the inner wall formwork 5, and the haunch corner formwork 16 forms an obtuse angle fit with the top formwork 7 and the inner wall formwork 5.

[0031] In this embodiment, the armpit corner template 16 can disperse the compressive force acting on the angle area between the top template 7 and the inner wall template 5 when the concrete solidifies and expands. As a result, during the demolding operation, the top template 7 and the inner wall template 5 located in the inside corner area of ​​the pipe gallery can be separated from the concrete more easily, which improves the practicality of the invention in construction. Furthermore, the armpit corner template 16 can also strengthen the structural strength of the inside corner of the pipe gallery.

[0032] As a preferred embodiment, based on the above method, the inner wall template 5 and the corner template 16 are rotatably connected, and the rotation direction of the inner wall template 5 is towards one side of the gantry 8; a hydraulic brace 17 is also provided between the inner wall template 5 and the top template 7, and the hydraulic brace 17 can extend or shorten with the rotation of the inner wall template 5.

[0033] Specifically, in this embodiment, when moving the inner mold trolley 1, the inner wall template 5 can be rotated towards the gantry 8, which increases the gap between the concrete contact surface of the inner wall template 5 and the side wall of the pipe gallery. This ensures the smoothness of the movement of the inner mold trolley 1 and avoids friction between the concrete contact surface of the inner wall template 5 and the side wall of the pipe gallery during the movement of the inner mold trolley 1, which would cause wear on the concrete contact surface of the inner wall template 5 and affect the forming quality of the pipe gallery. Furthermore, in this embodiment, the hydraulic diagonal brace 17 is provided, which can enhance the structural strength of the junction area between the corner template 16, the inner wall template 5, and the top template 7, reducing the risk of deformation in this area during concrete pouring, thereby further ensuring the forming quality of the pipe gallery.

[0034] As a preferred embodiment, based on the above method, a first fixing seat 18 is provided on one side of the inner wall template 5, and a snap-fit ​​groove 19 is provided on the other side of the inner wall template 5. One end of the top support rod 10 is connected to the first fixing seat 18, and the other end extends into the snap-fit ​​groove 19. A rubber friction head 20 is also provided on the end of the top support rod 10 corresponding to the snap-fit ​​groove 19. The top support rod 10 and the first fixing seat 18 are rotatably connected and engaged. The snap-fit ​​groove 19 restricts the top support rod 10 to rotate only within the width of its groove. The snap-fit ​​groove 19 is divided into a first groove area 21 and a second groove area 22 along the vertical direction of the inner wall template 5. When the end of the top support rod 10 is located in the first groove area 21, the rubber friction head 20 abuts against the bottom of the groove in the first groove area 21. When the end of the top support rod 10 is located in the second groove area 22, the rubber friction head 20 is spaced from the bottom of the groove in the second groove area 22.

[0035] Specifically, in this embodiment, when using the top support rod 10 to maintain the spacing width between the inner wall templates 5, the end of the top support rod 10 needs to be adjusted into the first groove area 21; when moving the inner mold trolley 1, the end of the top support rod 10 needs to be adjusted into the second groove area 22; with this structural arrangement, the installation and disassembly of the top support rod 10 can be made more convenient, thereby improving the convenience of the present invention in actual use; On the other hand, in this embodiment, during the demolding operation of the inner wall formwork 5, the end of the top support rod 10 can be adjusted into the second groove area 22, and then the top support rod 10 can be rotated so that its end impacts the side wall of the second groove area 22. In this way, the inner wall formwork 5 can be more thoroughly separated from the concrete surface under the impact force generated by the impact of the two, thereby further improving the practicality of the present invention in actual construction.

[0036] As a preferred embodiment, based on the above method, the second groove area 22 is further disposed below the first groove area 21. With this structural arrangement, when the top support rod 10 impacts the side wall of the second groove area 22, the weight of the top support rod 10 itself can be effectively superimposed, thereby increasing the impact force generated when the top support rod 10 impacts the side wall of the second groove area 22.

[0037] As a preferred embodiment, based on the above method, the top support rod 10 is further configured as two rods. One top support rod 10 is positioned near the top template 7, and the other top support rod 10 is positioned near the bottom plate of the pipe gallery. The first fixing seats 18 for fixing the two top support rods 10 are respectively positioned on the inner wall templates 5 on the left and right sides. With this structural configuration, the impact force generated by the top support rod 10 striking the second groove area 22 can be more evenly distributed on the inner wall templates 5 on both sides of the pipe gallery. Furthermore, the two top support rods 10 can impact the inner wall templates 5 on both sides of the pipe gallery respectively, thus allowing the inner wall templates 5 to separate better from the concrete surface, further improving the practicality of the invention in actual construction.

[0038] As a preferred embodiment, based on the above method, the inner slide rail 23 further includes a support plate 26 and an inner track 27 disposed on the support plate 26. The support plate 26 is fixed to the bottom plate of the pipe gallery. The bottom of the inner wall template 5 is also provided with a second fixing seat 28. A diagonal brace 29 is rotatably connected to the second fixing seat 28. The length of the diagonal brace 29 is adjustable. The support plate 26 is also provided with a limiting groove 30, which is used to accommodate the end of the diagonal brace 29.

[0039] Specifically, in this embodiment, the diagonal brace 29 can apply pressure to the bottom area of ​​the inner wall formwork 5, which makes the bottom area of ​​the inner wall formwork 5 fit more closely with the guide wall that is integrally formed with the bottom plate of the pipe gallery, thereby reducing or even avoiding the seepage of cement slurry during concrete pouring, and further improving the practicality of the invention in actual construction. On the other hand, the diagonal brace 29 can also strengthen the reinforcement effect of the inner wall formwork 5, reducing the risk of deformation and displacement of the inner wall formwork 5 during concrete pouring, thereby further ensuring the forming quality of the pipe gallery.

[0040] Example 3: As Figure 1 , Figure 4 and Figure 5 As shown, the sliding assembly of the formwork support for underground integrated pipe gallery construction according to the present invention, based on the above-mentioned method, further comprises the inner wall formwork 5 consisting of multiple inner formwork units. Adjacent inner formwork units are connected as a whole by pins and pin plates. Each inner formwork unit includes a first inner wall panel 31 and a second inner wall panel 32. The first inner wall panel 31 is connected to the corner formwork 16, and the second inner wall panel 32 is connected to the first inner wall panel 31. The connection part of the first inner wall panel 31 and the second inner wall panel 32 is located in the top area of ​​the guide wall integrally formed with the pipe gallery bottom plate. The second fixing seat 28 is disposed on the second inner wall panel 32. The first inner wall panel 31 is provided with a slider 33 at its end, and the second inner wall panel 32 is provided with a groove 34 at its end. The central axis of the groove 34 is perpendicular to the central axis of the top surface of the guide wall integrally formed with the bottom plate of the pipe gallery, and there is a gap between the two ends of the groove 34 and the edge line of the cross section of the second inner wall panel 32. The slider 33 is engaged in the groove 34. By striking the first inner wall panel 31, pressure is applied to the bottom edge of the first inner wall panel 31 on the edge of the top area of ​​the guide wall integrally formed with the bottom plate of the pipe gallery. Under the pressure, the concrete in this area can be broken, and then the end of the first inner wall panel 31 slides a certain distance into the side wall of the pipe gallery.

[0041] In this embodiment, it is considered that during the pouring of the pipe gallery concrete, the guide wall that is integrally formed with the pipe gallery base plate may have unevenness. As a result, during the formwork erection process, the concrete contact surface of the inner wall formwork 5 may not coincide with the edge line of the side wall of the pipe gallery to be poured, causing an error between the actual size of the pipe gallery cavity and the design size, which in turn affects the installation of equipment in the pipe gallery. Based on this, in this embodiment, the first inner wall panel 31 and the second inner wall panel 32 are slidably connected. During the erection of the template, if the concrete contact surface of the inner wall template 5 is located outside the edge line of the pipe gallery side wall, the second inner wall panel 32 is first fixed using the diagonal brace 29. Then, the inner template unit that needs to be adjusted is separated. After completion, the first inner wall panel 31 is struck with a hammer. Under the impact force generated by the hammer, the concrete at the edge of the top area of ​​the guide wall integrally formed with the bottom plate of the pipe gallery breaks. Then, the end of the first inner wall panel 31 slides a distance into the side wall range of the pipe gallery, so that the concrete contact surface of the first inner wall panel 31 can coincide with the edge line of the side wall of the pipe gallery to be poured. This structural design ensures that the concrete contact surface of the first inner wall panel 31 always coincides with the edge line of the side wall of the pipe gallery to be poured after the formwork is erected, thereby further ensuring the forming quality of the pipe gallery. Furthermore, in this embodiment, during the adjustment of the fixed position of the first inner wall panel 31, allowing it to slide a certain distance into the side wall area of ​​the pipe gallery, the concrete at the edge of the top area of ​​the guide wall integrally formed with the pipe gallery base plate is broken up. This allows for a more compact bonding between the old and new concrete surfaces of the pipe gallery side wall, reducing the risk of leakage in this area. Moreover, in this embodiment, the first inner wall panel 31... After sliding a certain distance within the side wall of the corridor, a portion of the end of the first inner wall panel 31 can abut against the already formed concrete of the corridor side wall, improving the tightness of the fit between the end of the first inner wall panel 31 and the guide wall integrally formed with the bottom plate of the corridor. This effectively reduces the total amount of concrete slurry leaking into the area of ​​the second inner wall panel 32 during the pouring construction, thus effectively inhibiting the leakage of concrete slurry into the groove 34 and ensuring the smooth sliding fit between the first inner wall panel 31 and the second inner wall panel 32, thereby further improving the practicality of the invention in actual construction.

[0042] Example 4: Figures 1 to 6 As shown, the construction method of the formwork support sliding assembly for underground integrated pipe gallery construction according to the present invention includes the following steps: A. Construction of the base slab and guide wall of the utility tunnel: pour the base slab and guide wall of the utility tunnel to form the working plane of the formwork trolley; B. Install the template support sliding assembly: Install the inner mold trolley 1 and the outer mold trolley 2 on the base of the pipe gallery bottom plate and guide wall formed in step A to form the casting cavity of the pipe gallery side wall and top plate. C. Adjust the fixed position of the inner wall formwork 5: After the formwork support sliding assembly is installed, adjust the fixed position of the inner wall formwork 5 so that the concrete contact surface of the inner wall formwork 5 coincides with the edge line of the side wall of the pipe gallery to be poured. D. Pouring concrete for the side walls and top slab of the utility tunnel: Pouring concrete for the side walls and top slab of the utility tunnel to enclose and shape the utility tunnel structure. E. Demolding and turnover of formwork trolleys: After the side walls and top slab of the pipe gallery reach the design strength in step D, the inner formwork trolley 1 and the outer formwork trolley 2 are demolded and slid to the next construction section.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A formwork support sliding assembly for underground comprehensive pipe gallery construction, characterized in that: It includes an inner mold trolley, an outer mold trolley, a slide rail component and a template system. The inner mold trolley is arranged in the cavity of the pipe gallery, and the outer mold trolley is arranged on the left and right sides of the pipe gallery. The slide rail component is arranged on the bottom plate of the pipe gallery structure, and the slide rail component is arranged in the length direction corresponding to the extension of the pipe gallery. The slide rail component includes an inner slide rail and an outer slide rail. The inner slide rail is arranged in the area of ​​the pipe gallery bottom plate corresponding to the inner mold trolley, and the outer slide rail is arranged in the area of ​​the pipe gallery bottom plate corresponding to the outer mold trolley; the bottom of the inner mold trolley and the outer mold trolley are provided with running wheels, and the inner mold trolley and the outer mold trolley are moved along the slide rail component by applying a push / pull force on the inner mold trolley and the outer mold trolley; The template system includes an inner wall template, an outer wall template and a top surface template. The outer wall template is arranged on the outer template trolley, and the outer wall template corresponds to the outer surface of the side wall of the pipe gallery; the inner wall template and the top surface template are arranged on the inner template trolley, and the inner wall template and the top surface template are an integrated structure. The inner wall template corresponds to the inner surface of the side wall of the pipe gallery, and the top surface template corresponds to the top surface of the pipe gallery structure. The inner wall template, the outer wall template and the top surface template cooperate with each other to form a casting cavity of the pipe gallery structure; The inner mold trolley includes a gantry and a hydraulic cylinder, the travel wheels are arranged at the bottom of the gantry, the hydraulic cylinder is arranged at the top of the gantry, the top surface template is connected to the hydraulic cylinder, the hydraulic pressure is used to adjust the spacing width between the top surface template and the top of the gantry, and a top support rod is also arranged between the inner wall templates, and the top support rod is used to maintain the spacing width between the inner wall templates; A horizontal pull rod is arranged between the outer mold trolleys on the left and right sides of the pipe gallery structure, and the horizontal pull rod is connected to the top of the outer mold trolley, and the horizontal pull rod is used to maintain the spacing distance between the outer mold trolleys on the left and right sides of the pipe gallery; the outer mold trolley includes a bearing frame and a plurality of anchoring screws, the exterior wall formwork is connected to the bearing frame, and a fixing sleeve is arranged at the bottom of the bearing frame, and the fixing sleeve is arranged perpendicular to the bottom plate of the pipe gallery, and the inner diameter of the fixing sleeve matches the outer diameter of the anchoring screw, and the anchoring screw is inserted into the fixing sleeve, and the anchoring screw can slide in the fixing sleeve, and a limiting hole is also arranged at a position of the bottom plate of the pipe gallery corresponding to the fixing sleeve, and the diameter of the limiting hole matches the diameter of the anchoring screw, and the limiting hole is used for the anchoring screw to extend into, and after the anchoring screw extends into the limiting hole, the end of the anchoring screw away from the bottom plate of the pipe gallery exceeds the top of the fixing sleeve.

2. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to claim 1 is characterized in that: The anchor screw is also provided with an adjusting bolt, which is threadedly connected with the anchor screw. The adjusting bolt is arranged corresponding to the two ends of the fixing sleeve. The anchor screw can be fixed by screwing the adjusting bolt to make it abut against the two ends of the fixing sleeve.

3. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to claim 2 is characterized in that: An armpit corner template is arranged between the top surface template and the inner wall template, and an obtuse angle is formed between the armpit corner template, the top surface template and the inner wall template.

4. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to claim 3 is characterized in that: The inner wall formwork and the armpit corner formwork are rotatably connected, and the rotation direction of the inner wall formwork is toward one side of the door frame; a hydraulic diagonal brace is also provided between the inner wall formwork and the top surface formwork, and the hydraulic diagonal brace can be extended or shortened with the rotation of the inner wall formwork.

5. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to claim 4 is characterized in that: A first fixing seat is provided on the inner wall formwork on one side, and a clamping groove is provided on the inner wall formwork on the other side. One end of the top support rod is connected to the first fixing seat, and the other end extends into the clamping groove. A rubber friction head is also provided at the end of the top support rod corresponding to the clamping groove. The top support rod and the first fixing seat are rotatably connected, and the clamping groove limits the top support rod to rotate only within the width of its groove. The clamping groove is divided into a first groove area and a second groove area along the vertical direction of the inner wall formwork. When the end of the top support rod is located in the first groove area, the rubber friction head abuts against the groove bottom of the first groove area; when the end of the top support rod is located in the second groove area, the rubber friction head forms a gap with the groove bottom of the second groove area.

6. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to claim 5 is characterized in that: The second groove area is arranged below the first groove area.

7. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to claim 6 is characterized in that: The top support rods are arranged in two rows, one of which is arranged on one side of the top surface formwork, and the other is arranged on one side of the bottom plate of the pipe gallery, and the first fixing seats for fixing the two top support rods are respectively arranged on the inner wall formworks on the left and right sides.

8. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to any one of claims 3 to 7, characterized in that: The inner slide rail includes a bearing plate and an inner track arranged on the bearing plate, the bearing plate is fixed on the bottom plate of the pipe gallery, a second fixing seat is also arranged at the bottom of the inner wall formwork, a diagonal support rod is rotatably connected to the second fixing seat, the length of the diagonal support rod is adjustable, a limiting groove is also arranged on the bearing plate, and the limiting groove is used to accommodate the end of the diagonal support rod.

9. The formwork support sliding assembly for underground comprehensive pipe gallery construction according to claim 8 is characterized in that: The inner wall formwork is composed of a plurality of inner formwork units, and the adjacent inner formwork units are connected as a whole by pins and pin pieces. The inner formwork unit includes a first inner wall panel and a second inner wall panel. The first inner wall panel is connected to the armpit corner formwork, and the second inner wall panel is connected to the first inner wall panel. The connection part of the first inner wall panel and the second inner wall panel is located at the top area of ​​the guide wall integrally formed with the bottom plate of the pipe gallery, and the second fixing seat is arranged on the second inner wall panel. A slider is provided at the end of the first inner wall panel, and a slide groove is provided at the end of the second inner wall panel. The central axis of the slide groove is perpendicular to the central axis of the top surface of the guide wall body formed integrally with the bottom plate of the pipe gallery, and a gap is provided between the two ends of the slide groove and the edge line of the cross section of the second inner wall panel. The slider is clamped in the slide groove. Knock on the first inner wall panel so that the bottom edge of the first inner wall panel applies pressure to the edge of the top area of ​​the guide wall integrally formed with the bottom plate of the corridor. Under the action of pressure, the concrete in this area can be broken, and then the end of the first inner wall panel slides a distance into the side wall range of the corridor.

10. A construction method of a formwork support sliding assembly for underground comprehensive pipe gallery construction, characterized in that: The steps include: A. Construction of pipe gallery bottom plate and guide wall: Cast the bottom plate and guide wall of the pipe gallery to form the working plane of the template trolley; B. Install the formwork support sliding assembly as described in any one of claims 1 to 9: install the inner mold trolley and the outer mold trolley on the base of the pipe gallery bottom plate and the guide wall formed in step A to form a casting cavity for the side wall and the top plate of the pipe gallery; C. Adjust the fixed position of the inner wall formwork: After the formwork support sliding assembly is installed, adjust the fixed position of the inner wall formwork so that the concrete contact surface of the inner wall formwork coincides with the edge line of the side wall of the pipe gallery to be poured; D. Casting the side walls and top slab of the pipe gallery: Casting the concrete of the side walls and top slab of the pipe gallery to make the pipe gallery structure closed and formed; E. Demoulding and turnover of the formwork trolley: After the side walls and top plate of the pipe gallery reach the designed strength in step D, the inner and outer formwork trolleys are demolded and slid to the next construction section.

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