Construction method for large-span water conservancy aqueduct

Abstract

The application discloses a construction method for a large-span water conservancy aqueduct, and comprises the following steps: S1. pouring the aqueduct: main support oil cylinders are lifted to make the aqueduct forming machine reach the aqueduct forming height position, the heavy-load pouring mode is converted, the inner mold system is moved forward into the outer mold system and is moved forward to the position, the inner mold system is opened, the concrete is poured to form the aqueduct, and the concrete is cured; S2. aqueduct demolding: after the concrete is solidified, the inner mold system is retracted, the end mold is removed, the main support oil cylinders are lowered, and the main frame and the outer mold system are integrally lowered to demold; S3. opening of the outer mold system: the middle joint bolt of the outer rib bottom and the outer mold system bottom mold is released, the rotating oil cylinder is retracted by operating the pump station, the outer mold system is rotated and opened, and the aqueduct pier is avoided; the construction method for the aqueduct based on the novel aqueduct forming machine can realize the construction of the equipment on the curve section by utilizing the rotating function of the front auxiliary supporting leg and the transverse moving function of the main supporting leg and the rear auxiliary supporting leg.

Description

Technical Field

[0001] This invention relates to the field of hydraulic aqueduct construction equipment technology, and in particular to a construction method for large-span hydraulic aqueducts. Background Technology

[0002] Due to my country's vast territory and uneven distribution of water resources, with the continuous development and progress of science and technology, water diversion projects have gradually become the first choice for alleviating water shortage problems in water-scarce areas. Aqueducts are one of the main structures in water diversion, and their construction quality, construction safety, and construction progress will directly affect the construction of the project.

[0003] With the vigorous development of aqueduct construction in Southwest my country, the complex geological conditions in the region have led to construction conditions involving large spans, high piers, and small curves. Conventional full-span scaffolding methods cannot meet the construction requirements. Furthermore, since aqueducts are generally large-section, thin-walled, and high-webbed structures, the support load on the top of the channel surface is usually relatively small. Excessive channel surface load will inevitably have a certain impact on the channel body. Therefore, it is necessary to develop a new mechanized construction technology for aqueducts that can meet the requirements of large spans, high piers, small curves, and have minimal impact on the channel body. Summary of the Invention

[0004] The purpose of this invention is to propose a construction method for large-span hydraulic aqueducts, which is applicable to construction conditions with large spans, high piers, and small curves, while having minimal impact on the aqueduct body during construction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A construction method for a long-span hydraulic aqueduct, using an aqueduct construction device, the aqueduct construction device including a main frame of two and a half spans, the main frame including a load-bearing main beam located in the middle, and a front guide beam and a rear guide beam respectively provided at both ends of the load-bearing main beam;

[0007] The outriggers support the main frame on the piers. The outriggers include the front auxiliary outriggers that support the front guide beam, the main outriggers that support the load-bearing main beam, and the rear auxiliary outriggers that support the rear guide beam.

[0008] The front auxiliary support leg includes a support beam, the top of which is provided with a hanging device connected to the front guide beam. The support beam is connected to the upper beam via a pivot. The bottom of the upper beam is provided with a hinge assembly. The bottom of the hinge assembly is provided with a fixed column. The bottom of the fixed column is provided with a front support cylinder. The bottom of the front support cylinder is provided with a front anchoring longitudinal beam that can be connected to the pier.

[0009] The main support leg includes two identical structures: a first main support leg and a second main support leg. The main support leg includes a main crossbeam, a main support bracket on the main crossbeam, a main slide on the main support bracket, and a hook device on the main slide that is attached to the bottom of the main frame. A main transverse hydraulic cylinder is installed between the main crossbeam and the main support bracket. A main support leg column is installed at the bottom of the main crossbeam, and the bottom of the main support leg column is supported on the pier by the main support hydraulic cylinder. A longitudinal sliding shoe is installed on the side wall of the main slide that is pinned to the jacking rail. A main longitudinal hydraulic cylinder is installed between the longitudinal sliding shoe and the main support bracket.

[0010] The rear auxiliary outrigger includes a rear crossbeam, a rear support bracket on the rear crossbeam, a rear sliding seat on the rear support bracket, a rear lateral movement cylinder between the rear crossbeam and the rear support bracket, a detachable rear distribution beam at the bottom of the rear crossbeam, a rear support cylinder at the bottom of the rear distribution beam, a detachable rear column at the bottom of the rear crossbeam, a rear support cylinder at the bottom of the rear column, and a rear anchoring longitudinal beam at the bottom of the rear support cylinder that can be connected to the pier.

[0011] A hoisting device that can reciprocate along the main frame;

[0012] The hanging outer rib system is installed on the main beam and connected to the outer formwork system. The hanging outer rib system can be opened from the middle. The hanging outer rib system includes an outer rib connected to the cantilever beam. A tie rod is installed inside the outer rib. An outer rib tilting cylinder is installed between the outer rib and the cantilever beam. The outer formwork system is located inside the hanging outer rib system. The outer formwork system includes a bottom formwork installed on the bottom surface of the outer rib and a belly formwork connected to the inner wall of the outer rib through an adjustable support system. The bottom of the belly formwork is connected to the bottom formwork.

[0013] An inner mold system accessible from the outer mold system includes an inner beam system, an inner template system, and a strut assembly. The inner beam system includes an inner main beam, with an inner beam support leg outer column at the bottom of the inner main beam. An inner beam support leg inner column is located inside the inner beam support leg outer column, and a travel wheel box is located at the bottom of the inner beam support leg inner column. A column lifting cylinder is installed between the inner main beam and the inner beam support leg inner column. The strut assembly is located between the inner main beam and the main frame. The inner template system includes an inner mold template, with an inner mold support outer sleeve inside the inner mold template. The inner mold support outer sleeve is connected to the inner mold support inner sleeve via an inner mold transverse movement cylinder and an adjustable strut. The inner mold support inner sleeve is mounted on the inner main beam. An inner mold tilting cylinder is also installed inside the inner mold template.

[0014] The construction method includes the following steps:

[0015] S1. Aqueduct pouring: The main support cylinder lifts the aqueduct machine to the aqueduct elevation position, and switches to heavy-duty pouring mode. The inner mold system moves forward into the outer mold system and moves into place. The inner mold system opens, and concrete is poured to form the aqueduct. The concrete is then cured.

[0016] S2. Aqueduct demolding: After the concrete has solidified, the inner formwork system is contracted, the end formwork is removed, the main support cylinders are lowered, and the main frame and outer formwork system are moved down as a whole for demolding.

[0017] S3. Opening the outer mold system: Loosen the center seam bolts of the bottom of the outer rib and the bottom mold of the outer mold system, operate the pump station to retract the rotary cylinder, and the outer mold system will rotate and open, avoiding the trough pier;

[0018] S4. Main frame forward movement: When the travel route is a straight line, the electric hoist travels to the rear of the main frame, and the main longitudinal movement cylinders on the first and second main support legs are activated, causing the whole machine to move forward half a span until the front auxiliary support leg reaches the top of the next pier and provides support.

[0019] S5. Second main support leg moves forward: The rear auxiliary support leg is supported on the aqueduct, the second main support leg is disengaged, and the second main support leg moves forward by one span to the top of the next pier and supports it.

[0020] S6. First main support leg moves forward: Second main support leg supports main beam, freeing the first main support leg, first main support leg moves forward one span to the top of the next pier and supports it, freeing the front auxiliary support leg;

[0021] S7. Secondary forward movement of the main frame: The main longitudinal hydraulic cylinders on the first and second main support legs move, driving the main frame forward by half a span;

[0022] S8. Operate the rotating hydraulic cylinder of the pump station's outer rib to bring the outer rib and outer mold together, and connect the bolts at the bottom seam of the outer mold system and the bottom seam of the outer rib;

[0023] S9. Repeat steps S1-S8 to complete the construction of the remaining span of the aqueduct.

[0024] Preferably, step S1 further includes binding the bottom slab and web reinforcement cage, binding the top slab reinforcement, installing the top slab formwork, and installing the end formwork.

[0025] Preferably, in step S1, the inner mold system moves via a traveling wheel box, which is driven by a motor, and a track is provided between the tied top plate steel bars for the traveling wheel box to move.

[0026] Preferably, in step S1, after the inner mold system moves forward into position, it is positioned by an adjustable support rod.

[0027] Preferably, in step S2, the inner mold system shrinks by means of a column lifting cylinder.

[0028] Preferably, step S4 further includes the following steps for curved path walking:

[0029] S41. Using the center line of the main support bracket of the second main support leg as the pivot, drive the main lateral movement cylinder of the first main support leg to move the main frame laterally a certain distance to the inside of the curve.

[0030] S42. Using the center line of the main support bracket of the first main support leg as the pivot, drive the main lateral movement cylinder of the second main support leg to move the main frame laterally a certain distance to the outside of the curve;

[0031] S43. Repeat S41 and S42 to make the centerline of the main frame coincide with the centerline of the front auxiliary leg at the front pier support point;

[0032] S44. The main longitudinal displacement cylinders of the two main support legs move, driving the main frame to move forward half a span, and the front auxiliary support leg reaches the front pier top support;

[0033] S45. The rear auxiliary outrigger's rear lateral movement cylinder actuates, causing the center line of the rear distribution beam's cross section to coincide with the center line of the aqueduct's cross section.

[0034] Preferably, in S44, before the front auxiliary outrigger is supported, the angle between the support beam and the upper beam needs to be adjusted until the support beam is perpendicular to the center line of the main frame, and the line connecting the front support cylinders is perpendicular to the longitudinal center line of the trough block.

[0035] Preferably, step S7 consists of three steps:

[0036] S71. The main longitudinal hydraulic cylinders on the first and second main outriggers move, driving the main frame to move forward 1 / 4 span, disengaging the auxiliary outriggers;

[0037] S72. Reactivate the main longitudinal movement cylinders on the first and second main support legs to drive the main frame forward by 1 / 4 span until it reaches the next pouring position;

[0038] S73. The rear auxiliary support leg moves forward by 1 / 4 of the stride.

[0039] The beneficial effects of this invention are as follows:

[0040] 1. The construction method of the aqueduct based on this new type of trenching machine can not only achieve straight travel and straight construction, but also, when the terrain is complex, the equipment can be constructed on curved sections by utilizing the rotation function of the front auxiliary legs and the lateral movement function of the main legs and the rear auxiliary legs.

[0041] 2. Based on the construction method of the aqueduct using this new type of trenching machine, the contraction and expansion of the inner template are achieved by hydraulic cylinders, and the through holes of the inner template system are driven by the motor of the traveling wheel box, which is safe and efficient.

[0042] 3. Based on the construction method of the aqueduct using this new type of trenching machine, the positioning of the inner formwork after unfolding is achieved through stepless adjustment of the adjustable support rod, which solves the problem that the inner formwork is difficult to position in the design position when it deviates during the forward movement of the inner formwork system.

[0043] 4. Based on the construction method of the aqueduct of this new type of trenching machine, the equipment is moved forward through the hole in three steps. The main frame of the equipment and its carried components do not generate continuous moving loads on the already poured trench body during the process of passing through the hole, so the impact on the trench body is low and it is convenient for on-site construction. Attached Figure Description

[0044] Figure 1 This is a front view of the device used in steps S1-S3 of the present invention;

[0045] Figure 2 This is a front view of the device in step S4 of the present invention;

[0046] Figure 3 This is a front view of the device in step S5 of the present invention;

[0047] Figure 4 This is a front view of the device in step S6 of the present invention;

[0048] Figure 5 This is a front view of the device in step S71 of the present invention;

[0049] Figure 6 This is a front view of the device in step S72 of the present invention;

[0050] Figure 7 This is a front view of the device in step S8 of the present invention;

[0051] Figure 8 This is a cross-sectional view of the external mold system during the casting process of this invention;

[0052] Figure 9 This is a cross-sectional view of the outer mold system during the travel of the present invention;

[0053] Figure 10 This is a cross-sectional view of the shrinkage of the internal mold system of the present invention;

[0054] Figure 11 Front view of the main support leg;

[0055] Figure 12 Right view of the main support leg;

[0056] Figure 13 This is the front view of the rear auxiliary support leg;

[0057] Figure 14 Right view of the rear auxiliary support leg;

[0058] Figure 15Front view of the front auxiliary outrigger;

[0059] Figure 16 Right view of the front auxiliary outrigger;

[0060] Figure 17 This is a schematic diagram of the inner beam system in the state of being supported by the inner sleeve column of the outrigger;

[0061] Figure 18 This is a schematic diagram of the inner beam system in the contracted state of the inner sleeve column of the support leg.

[0062] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0063] The present invention will now be further described with reference to the accompanying drawings.

[0064] like Figure 1 — Figure 10 As shown in the figure, an embodiment of the present invention provides a construction method for a long-span aqueduct. The aqueduct construction device includes a main frame 1 spanning two and a half spans, including a load-bearing main beam 11 located in the middle. A front guide beam 12 and a rear guide beam 13 are respectively installed at both ends of the load-bearing main beam 11. The load-bearing main beam 11 adopts a double-layer solid-web box-shaped rectangular structure, while the front guide beam 12 and the rear guide beam 13 both adopt a double-layer triangular truss structure. In this embodiment, the distance between the two piers 10 is 50m, the longitudinal length of the main frame 1 is 123m, the length of the heavy-load support section, i.e., the load-bearing main beam 11, is 56m, the length of the front guide beam is 26.5m, and the length of the rear guide beam is 40.5m. This design ensures that the stability coefficient of both forward and backward tilting during the crossing process reaches 1.5 times, preventing longitudinal overturning of the equipment. This equipment can be applied to a 50m span aqueduct, which is the largest aqueduct in China. The tonnage of the aqueduct that this equipment can cast is also the largest among U-shaped aqueducts in China. The main frame beam adopts a single main beam form, which greatly reduces a series of costs such as manufacturing, transportation, installation and dismantling. At the same time, with the rotation function of the front auxiliary support leg and the lateral movement function of the main support leg and the rear auxiliary support leg, it is more conducive to adapting to curved construction.

[0065] The main frame 1 is supported on the pier 10 by the outriggers, which include the front auxiliary outrigger 2 supporting the front guide beam 12, the main outrigger 3 supporting the load-bearing main beam 11, and the rear auxiliary outrigger 4 supporting the rear guide beam 13.

[0066] like Figure 15 and Figure 16As shown, the front auxiliary support leg 2 is a fixed support leg, including a support beam 202. The top of the support beam 202 is equipped with a hanging device 201 connected to the front guide beam 12. Multiple installation positions for the front auxiliary support leg 2 are provided on the lower cover plate of the lower chord of the front guide beam 12. The front auxiliary support leg 2 can be automatically moved to different installation positions via the hanging device 201, thus adapting to construction of different spans. The support beam 22 is connected to the upper beam 203 via a pivot 208, allowing the upper beam 203 and the structure below it to rotate at a certain angle relative to the main frame 1. This, combined with the lateral movement of the main support leg 3 and the rear auxiliary support leg 4, facilitates the equipment's adaptation to curved construction. A hinge assembly 204 is provided at the bottom of the upper beam 203. A fixed column 205 is installed at the bottom, and a front support cylinder 207 is installed at the bottom of the fixed column 205. A front anchoring longitudinal beam 209, which can be connected to the pier 10, is installed at the bottom of the front support cylinder 207. The front anchoring longitudinal beam 209 can be fixed to the pier 10 via a front threaded steel bar 210, forming a single unit with the pier 10, serving as support below the outrigger. The front anchoring longitudinal beam 209 can solve the problem of the pier 10's excessively narrow longitudinal width. Two fixed columns 205 are symmetrically installed at the bottom of the upper crossbeam 203, and a connecting frame 206 is installed between the two fixed columns 205. When the equipment is being constructed at the end of the span, the fixed columns 205 and the connecting frame 206 can be removed, and the front support cylinder 207 can be directly installed below the hinge assembly 204. The front auxiliary outrigger 2, including the anchoring longitudinal beam 209, can ensure that the front auxiliary outrigger 2 and the main outrigger 3 are positioned on the same pier 10 without collision when the longitudinal pier is small.

[0067] like Figure 11 and Figure 12 As shown, the main support leg includes two identical structures: a first main support leg 3 and a second main support leg 9, which are respectively supported on the top of the front and rear piers of the span to be poured, serving as support points for the heavy-load pouring by the trenching machine. It includes a main crossbeam 304, on which a main support bracket 303 is mounted. A main slide block 301 is hinged to the main support bracket 303. The upper end of the main support leg 3 contacts the bottom of the main frame 1 through two slide blocks 301 to bear force. A hook device 302 is mounted on the main slide block 301 to hook onto the bottom of the main frame 1. 2 The lower end is bolted to the main slide 301, and the upper end is hooked to the lower cover plate on both sides of the web of the main beam 11 and the lower cover plate of the lower chord of the front guide beam 12 and the rear guide beam 13, which is used to support the weight of the main support leg 3 itself. A main transverse movement cylinder 307 is provided between the main cross beam 304 and the main support bracket 303. The main support bracket 303 can move laterally along the main cross beam 304 under the pushing and pulling action of the main transverse movement cylinder 307. The two ends of the main transverse movement cylinder 307 are respectively hinged to the main cross beam 304 and the main support bracket 303.

[0068] The bottom of the main crossbeam 304 is provided with a main support column 305. The bottom of the main support column 305 is supported on the pier 10 by the main support cylinder 306, so as to realize the lifting of the whole machine and the detachment of itself. The main support column 305 is a box-shaped structure, which is a stable triangular structure in the longitudinal direction of the bridge. The main fine-rolled threaded steel bar 310 is provided between the bottom of the main support column 305 and the pier 10, and is anchored to the pier 10 as a whole to prevent the support leg from tipping over when the equipment is moved longitudinally.

[0069] The main slide block 301 has a longitudinal sliding shoe 309 that is pinned to the push rail 15 on its side wall. A main longitudinal sliding cylinder 308 is provided between the longitudinal sliding shoe 309 and the main support bracket 303. The main longitudinal sliding cylinder 308 drives the machine through hole and its own through hole.

[0070] The principle of the longitudinal sliding shoe 309 pushing the jacking track 15 and the main frame traveling through the hole is existing technology and will not be described in detail here.

[0071] like Figure 13 and Figure 14 As shown, the rear auxiliary support leg 4 is a movable support leg, serving as an auxiliary support leg for the trenching machine when passing through holes. It includes a rear crossbeam 403, which is a box-shaped steel box girder. A rear support bracket 402 is mounted on the rear crossbeam 403, and a rear slide block 401 is mounted on the rear support bracket 402. The upper end of the rear auxiliary support leg 4 contacts the bottom of the lower chord cover plate of the rear guide beam 13 via the rear slide block 401. A rear transverse movement cylinder 405 is installed between the rear crossbeam 403 and the rear support bracket 402. Under the pushing and pulling action of the rear transverse movement cylinder 405, the rear support bracket 402 can move laterally along the rear crossbeam 403. Two rear distribution beams 404 are symmetrically arranged at the bottom of 03. The rear distribution beams 404 and the rear crossbeams 403 are detachably connected. Two rear support cylinders 406 are symmetrically arranged at the bottom of each rear distribution beam 404, and the four cylinders share the load. The rear auxiliary support leg 4 is supported by cylinders instead of a wheel-rail system. During the construction of the equipment, there is no moving load on the trough surface, which is more conducive to the stress on the trough itself. Compared with the existing equipment, when the existing equipment passes through the hole, the rear auxiliary support leg needs to act on the top of the trough in the form of a wheel-rail system, which has a moving load on the trough body. However, the solution of this application does not have an additional load on the trough body.

[0072] 5. A hoisting device that can reciprocate along the main frame;

[0073] The hanging outer rib system 6 is installed on the main beam. The hanging outer rib system 6 can be opened from the middle. The hanging outer rib system 6 includes an outer rib 61 connected to the cantilever beam 14. A tie rod 63 is installed inside the outer rib 61. An outer rib tilting cylinder 62 is installed between the outer rib 61 and the cantilever beam 14 to drive the outer rib 61 to rotate carrying the outer mold system 7, thereby realizing the opening or closing of the outer mold system 7. The tie rod 63 is used to resist the lateral deformation of the outer rib during the pouring process.

[0074] The outer formwork system 7 is located inside the suspended outer rib system 6. The outer formwork system 7 includes a bottom formwork 71 set on the bottom surface of the outer rib 61 and a belly formwork 72 supported on the inner wall of the outer rib 61 by an adjustable support system 73. The bottom of the belly formwork 72 is connected to the bottom formwork 71 by bolts. The belly formwork 72 can move laterally on the panel of the bottom formwork 71. By adjusting the lateral position of the belly formwork 72 on the bottom formwork 71, the bottom formwork 71 can adapt to different bottom widths of the trench, making it easier for the equipment to adapt to different trench shapes, improving the formwork utilization rate, and reducing construction costs.

[0075] An inner mold system 8 that can be accessed from the outer mold system 7 includes an inner beam system 801, an inner template system 802, and a strut assembly 803.

[0076] like Figure 17 and Figure 18 As shown, the inner beam system 801 includes an inner main beam 811. An inner beam support leg outer sleeve column 812 is installed at the bottom of the inner main beam 811. The inner beam support leg outer sleeve column 812 is fixed to the outside of the lower chord of the inner main beam 811. An inner beam support leg inner sleeve column 813 is installed inside the inner beam support leg outer sleeve column 812. A traveling wheel box 814 for driving the overall displacement of the inner mold system 8 is bolted to the bottom of the inner beam support leg inner sleeve column 813. A column lifting cylinder 815 for controlling the lifting and lowering of the inner main beam 811 is installed between the inner main beam 811 and the inner beam support leg inner sleeve column 813. The strut assembly 803 is located between the inner main beam 811 and the main frame 1, preventing the inner mold system 8 from floating during the equipment casting process. The lifting and lowering of the inner beam support leg inner sleeve column 813 is achieved through the column lifting cylinder 815, which is convenient and quick. In contrast, in the prior art, a chain hoist is required in conjunction with the main support leg cylinder to achieve its lifting and lowering.

[0077] The inner formwork system 802 includes an inner formwork template 823, within which an inner formwork support outer sleeve 821 is integrally installed. The inner formwork support outer sleeve 821 is connected to the inner formwork support inner sleeve 822 via an inner formwork lateral movement cylinder 824 and an adjustable support rod 826. The inner formwork support inner sleeve 822 is bolted to the inner main beam 811. The lateral contraction and opening of the inner formwork template 823 is achieved by the extension and retraction of the inner formwork lateral movement cylinder 824. The inner formwork template 823 is also equipped with an inner formwork tilting cylinder 825. When the inner formwork template 823 reaches the design position, it is positioned by the adjustable support rod 826. This positioning method can ensure that the inner formwork template 823 remains in the design position even if the inner formwork system 8 deviates slightly during the displacement process, which maximizes the convenience of on-site construction and ensures the quality of the trench. In contrast, the existing inner formwork lateral positioning is achieved by using inner and outer sleeve pins, which can easily lead to situations where the inner and outer sleeve pins cannot be properly inserted, resulting in difficulties in on-site adjustment.

[0078] The construction method includes the following steps:

[0079] S1. Casting of aqueduct: such as Figure 1 and Figure 8As shown, the main support cylinder 306 lifts the trough making machine to the trough making elevation position, and switches to heavy-duty pouring mode. That is, the extension rod of the cylinder is clamped by the clamp, the inner mold system moves forward into the outer mold system and moves into place, the inner mold system opens, and concrete is poured to form a trough, and the concrete is cured.

[0080] like Figure 17 and Figure 18 As shown, the inner mold system is driven by a motor to travel through the hole. When the construction line is curved, the travel through the hole can be achieved by disassembling the bolts between the inner beam and the various sections of the inner mold. However, the existing method of inner mold traveling through holes cannot adapt to curved holes.

[0081] After the aqueduct is poured, the inner mold template 823 is flipped upward by the inner mold tilting cylinder 825, and the column lifting cylinder 815 controls the inner beam support leg inner sleeve column 813 to move down and support it in the formed aqueduct. The adjustable support rod 826 is removed and the inner mold template 823 is retracted inward. The whole machine (main frame 1 and the hanging outer rib system 6, outer mold system 7 and support legs connected to it) moves into place.

[0082] Afterwards, the inner beam system moves through the hole. Once it reaches the desired position, the inner formwork template 823 unfolds, and the adjustable support rod 826 is installed. The inner beam support leg inner sleeve column 813 is moved upward and detached (including the lower track) using the column lifting cylinder 815, and the inner formwork template 823 unfolds.

[0083] S2. Aqueduct demolding: such as Figure 10 As shown, after the concrete has solidified, the inner formwork system 8 shrinks, the end formwork is removed, the main support cylinder 306 falls back, and the main frame 1 and the outer formwork system 7 move down as a whole to demold, with a downward movement height of about 15cm.

[0084] S3. External mold system activated: (e.g.) Figure 9 As shown, the center seam bolts of the bottom of the outer rib and the bottom mold of the outer mold system are released, and the pump station is operated to retract the outer rib rotating cylinder 62, and the outer mold system 7 is rotated and opened to avoid interference with the pier 10 during the movement.

[0085] S4. Main frame moves forward once: When the walking route is a straight line, such as... Figure 2 As shown, when the electric hoist travels to the rear of the main frame 1, the main longitudinal movement cylinders 308 on the first and second main support legs are activated, causing the whole machine to move forward by half a span, about 24.2 meters, until the front auxiliary support leg 2 reaches the top of the next pier and provides support. During the forward movement, the inner mold system 8 remains in the poured aqueduct after it retracts until the whole machine has moved. Then it starts to move forward again and enters the outer mold system 7 to pour the next aqueduct.

[0086] S5. The second main support leg moves forward: as shown in the following... Figure 3As shown, the rear auxiliary leg 4 is supported on the aqueduct, detaching the second main leg 9. The second main leg 9 moves forward one span to the top of the next pier and supports it. At this time, the second main leg 9 and the first main leg 3 are located on the top of the same pier.

[0087] S6. Move the first main support leg forward: as shown in the image. Figure 4 As shown, the second main support leg 9 supports the main beam and detaches the first main support leg 3. The first main support leg 3 moves forward one span to the top of the next pier and supports it. At this time, the first main support leg 3 and the front auxiliary support leg 2 are located on the same pier top, and the front auxiliary support leg 2 is detached.

[0088] S7. Secondary forward movement of the main frame: The main longitudinal movement cylinders 308 on the first and second main support legs move in conjunction with the longitudinal movement slippers 309 to drive the main frame to move forward half a span;

[0089] S71. For example Figure 5 As shown, the main longitudinal movement cylinders 308 on the first and second main support legs actuate, driving the main frame to move forward 1 / 4 span, approximately 12.3 meters, and disengaging the rear auxiliary support leg 4. Before this action of "moving the main frame forward 1 / 4 span", the overall center of gravity of the equipment is still between the second main support leg and the rear auxiliary support leg. If the rear auxiliary support leg does not provide support, the equipment will tip backward. After the action of "moving the main frame forward 1 / 4 span", the overall center of gravity of the equipment is now located between the first main support leg and the front auxiliary support leg. Therefore, after this action, the rear auxiliary support leg cylinder can disengage, and the rear auxiliary support leg cylinder can be retracted to disengage.

[0090] S72. For example Figure 6 As shown, the main longitudinal movement cylinders 308 on the first and second main support legs are restarted to drive the main frame forward by 1 / 4 span, about 13.5 meters, until the next pouring position is reached;

[0091] S73. The rear auxiliary outrigger is moved forward by 1 / 4 span, approximately 12.3 meters, via the hoisting device 5 and suspended on the rear guide beam 13.

[0092] S8. For example Figure 7 As shown, the operating pump station outer rib rotating cylinder carries the outer rib and outer mold together, and connects the bolts at the bottom seam of the outer mold system and the bottom seam of the outer rib, so that the inner mold system 8 can be moved forward into the outer mold system 7;

[0093] S9. Repeat steps S1-S8 to complete the construction of the remaining span of the aqueduct.

[0094] Step S1 also includes binding the bottom slab and web reinforcement cages, binding the top slab reinforcement, installing the top slab formwork, and installing the end formwork. The reinforcement used for binding can be transported along the top surface of the already poured trench to the rear end of the trench to be poured using a reinforcement transport trolley. Then, the reinforcement is transported into the span using the hoisting assembly 5. The hoisting assembly 5 can use an electric hoist, which solves the problem of reinforcement placement under complex ground conditions on site, saves the need for large-scale tower crane erection on site, and greatly saves construction costs. The end formwork is set at both ends of the inner and outer formwork, and is connected to the inner and outer formwork respectively to seal both ends of the trench. The bottom slab and web reinforcement cages, top slab reinforcement, and top slab formwork are all commonly used devices in the existing pouring process, and will not be described in detail here.

[0095] In step S1, the inner formwork system 8 travels via the traveling wheel box 814, which is driven by a motor. The binding top plate steel bars are provided with a track for the traveling wheel box 814 to move. When the line is curved, the track can be laid in a curved pattern. At the same time, the bolts at the joints of each section of the inner beam and each section of the inner formwork are removed.

[0096] After the inner mold system 8 is in place, the inner mold template 823 is unfolded by a hydraulic cylinder. After the inner mold template 823 reaches the design position, it is positioned by an adjustable support rod 826. This positioning method can ensure that the inner mold template can still be in the design position even if the inner mold system 8 deviates slightly during the displacement process, which can facilitate on-site construction to the greatest extent and ensure the quality of the tank.

[0097] In step S2, the inner mold system 8 shrinks by means of the column lifting cylinder 815.

[0098] Due to terrain and construction conditions, it is impossible for all bridge piers to be on the same straight line. When the line connecting the current pier to the next pier deviates from the line connecting the current pier to the previous pier, the equipment needs to travel in a curved path. The S4 of the curved path includes the following steps:

[0099] S41. Using the center line of the main support bracket of the second main support leg 9 as the pivot, drive the main lateral movement cylinder of the first main support leg 3 to move the main frame 1 laterally a certain distance to the inside of the curve. The lateral movement distance is calculated in advance according to the curve angle.

[0100] S42. Using the center line of the main support bracket of the first main support leg 3 as the pivot, drive the main lateral movement cylinder of the second main support leg 9 to move the main frame 1 laterally a certain distance to the outside of the curve. The lateral movement distance is calculated in advance according to the curve angle.

[0101] S43. Repeat S41 and S42 until the centerline of the main frame 1 coincides with the centerline of the front auxiliary leg 2 at the front pier support. If the calculation is accurate, there is no need to repeat the action.

[0102] S44. The main longitudinal displacement cylinders 308 of the two main support legs are activated, driving the main frame 1 to move forward half a span, and the front auxiliary support leg 2 reaches the front pier top support;

[0103] S45. The rear lateral movement cylinder 405 of the rear auxiliary support leg 4 is activated, so that the center line of the cross section of the rear distribution beam 404 coincides with the center line of the cross section of the aqueduct body.

[0104] In S44, before the front auxiliary support leg 2 is supported, the angle between the support beam 22 and the upper beam 203 needs to be adjusted until the support beam 22 is perpendicular to the center line of the main frame 1, and the line connecting the front support cylinders 207 is perpendicular to the longitudinal center line of the trough block.

[0105] The construction method of this embodiment can adapt to complex terrain environments and can be applied to long-distance aqueducts and curved bridge piers. It has the advantages of ensuring construction safety and aqueduct quality, reducing construction costs, improving construction efficiency, and avoiding traffic disruption.

[0106] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0107] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify 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. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0108] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A construction method for long-span hydraulic aqueducts, using an aqueduct construction device, characterized in that, The aqueduct construction device includes a main frame spanning two and a half spans. The main frame includes a load-bearing main beam located in the middle, and a front guide beam and a rear guide beam are respectively installed at both ends of the load-bearing main beam. The outriggers support the main frame on the piers. The outriggers include the front auxiliary outriggers that support the front guide beam, the main outriggers that support the load-bearing main beam, and the rear auxiliary outriggers that support the rear guide beam. The front auxiliary support leg includes a support beam, the top of which is provided with a hanging device connected to the front guide beam. The support beam is connected to the upper beam via a pivot. The bottom of the upper beam is provided with a hinge assembly. The bottom of the hinge assembly is provided with a fixed column. The bottom of the fixed column is provided with a front support cylinder. The bottom of the front support cylinder is provided with a front anchoring longitudinal beam that can be connected to the pier. The main support leg includes two identical structures: a first main support leg and a second main support leg. The main support leg includes a main crossbeam, a main support bracket on the main crossbeam, a main slide on the main support bracket, and a hook device on the main slide that is attached to the bottom of the main frame. A main transverse hydraulic cylinder is installed between the main crossbeam and the main support bracket. A main support leg column is installed at the bottom of the main crossbeam, and the bottom of the main support leg column is supported on the pier by the main support hydraulic cylinder. A longitudinal sliding shoe is installed on the side wall of the main slide that is pinned to the jacking rail. A main longitudinal hydraulic cylinder is installed between the longitudinal sliding shoe and the main support bracket. The rear auxiliary outrigger includes a rear crossbeam, a rear support bracket on the rear crossbeam, a rear sliding seat on the rear support bracket, a rear lateral movement cylinder between the rear crossbeam and the rear support bracket, a detachable rear distribution beam at the bottom of the rear crossbeam, a rear support cylinder at the bottom of the rear distribution beam, a detachable rear column at the bottom of the rear crossbeam, a rear support cylinder at the bottom of the rear column, and a rear anchoring longitudinal beam at the bottom of the rear support cylinder that can be connected to the pier. A hoisting device that can reciprocate along the main frame; The hanging outer rib system is installed on the main beam and connected to the outer formwork system. The hanging outer rib system can be opened from the middle. The hanging outer rib system includes an outer rib connected to the cantilever beam. A tie rod is installed inside the outer rib. An outer rib tilting cylinder is installed between the outer rib and the cantilever beam. The outer formwork system is located inside the hanging outer rib system. The outer formwork system includes a bottom formwork installed on the bottom surface of the outer rib and a belly formwork connected to the inner wall of the outer rib through an adjustable support system. The bottom of the belly formwork is connected to the bottom formwork. An inner mold system accessible from the outer mold system includes an inner beam system, an inner template system, and a strut assembly. The inner beam system includes an inner main beam, with an inner beam support leg outer column at the bottom of the inner main beam. An inner beam support leg inner column is located inside the inner beam support leg outer column, and a travel wheel box is located at the bottom of the inner beam support leg inner column. A column lifting cylinder is installed between the inner main beam and the inner beam support leg inner column. The strut assembly is located between the inner main beam and the main frame. The inner template system includes an inner mold template, with an inner mold support outer sleeve inside the inner mold template. The inner mold support outer sleeve is connected to the inner mold support inner sleeve via an inner mold transverse movement cylinder and an adjustable strut. The inner mold support inner sleeve is mounted on the inner main beam. An inner mold tilting cylinder is also installed inside the inner mold template. The construction method includes the following steps: S1. Aqueduct pouring: The main support cylinder lifts the aqueduct machine to the aqueduct elevation position, and switches to heavy-duty pouring mode. The inner mold system moves forward into the outer mold system and moves into place. The inner mold system opens, and concrete is poured to form the aqueduct. The concrete is then cured. S2. Aqueduct demolding: After the concrete has solidified, the inner formwork system is contracted, the end formwork is removed, the main support cylinders are lowered, and the main frame and outer formwork system are moved down as a whole for demolding. S3. Opening the outer mold system: Loosen the center seam bolts of the bottom of the outer rib and the bottom mold of the outer mold system, operate the pump station to retract the rotary cylinder, and the outer mold system will rotate and open, avoiding the trough pier; S4. Main frame forward movement: When the travel route is a straight line, the electric hoist travels to the rear of the main frame, and the main longitudinal movement cylinders on the first and second main support legs are activated, causing the whole machine to move forward half a span until the front auxiliary support leg reaches the top of the next pier and provides support. S5. Second main support leg moves forward: The rear auxiliary support leg is supported on the aqueduct, the second main support leg is disengaged, and the second main support leg moves forward by one span to the top of the next pier and supports it. S6. First main support leg moves forward: Second main support leg supports main beam, freeing the first main support leg, first main support leg moves forward one span to the top of the next pier and supports it, freeing the front auxiliary support leg; S7. Secondary forward movement of the main frame: The main longitudinal hydraulic cylinders on the first and second main support legs move, driving the main frame forward by half a span; S8. Operate the rotating hydraulic cylinder of the pump station's outer rib to bring the outer rib and outer mold together, and connect the bolts at the bottom seam of the outer mold system and the bottom seam of the outer rib; S9. Repeat steps S1-S8 to complete the construction of the remaining span of the aqueduct.

2. The construction method for a long-span hydraulic aqueduct according to claim 1, characterized in that, Step S1 also includes binding the bottom slab and web reinforcement cage, binding the top slab reinforcement, installing the top slab formwork, and installing the end formwork.

3. The construction method for a long-span hydraulic aqueduct according to claim 2, characterized in that, In step S1, the inner mold system moves via a traveling wheel box, which is driven by a motor. A track is provided between the tied top plate steel bars for the traveling wheel box to move.

4. A construction method for a long-span hydraulic aqueduct according to claim 1, characterized in that, In step S1, after the inner mold system moves forward into position, it is positioned by an adjustable support rod.

5. A construction method for a long-span hydraulic aqueduct according to claim 1, characterized in that, In step S2, the inner mold system shrinks by means of the column lifting cylinder.

6. A construction method for a long-span hydraulic aqueduct according to claim 1, characterized in that, S4 further includes the following steps for curved path walking: S41. Using the center line of the main support bracket of the second main support leg as the pivot, drive the main lateral movement cylinder of the first main support leg to move the main frame laterally a certain distance to the inside of the curve. S42. Using the center line of the main support bracket of the first main support leg as the pivot, drive the main lateral movement cylinder of the second main support leg to move the main frame laterally a certain distance to the outside of the curve; S43. Repeat S41 and S42 to make the centerline of the main frame coincide with the centerline of the front auxiliary leg at the front pier support point; S44. The main longitudinal displacement cylinders of the two main support legs move, driving the main frame to move forward half a span, and the front auxiliary support leg reaches the front pier top support; S45. The rear auxiliary outrigger's rear lateral movement cylinder actuates, causing the center line of the rear distribution beam's cross section to coincide with the center line of the aqueduct's cross section.

7. A construction method for a long-span hydraulic aqueduct according to claim 6, characterized in that, In S44, before the front auxiliary outrigger is supported, the angle between the support beam and the upper beam needs to be adjusted until the support beam is perpendicular to the center line of the main frame and the line connecting the front support cylinders is perpendicular to the longitudinal center line of the trough block.

8. A construction method for a long-span hydraulic aqueduct according to claim 1, characterized in that, The S7 consists of three steps: S71. The main longitudinal hydraulic cylinders on the first and second main outriggers move, driving the main frame to move forward 1 / 4 span, disengaging the auxiliary outriggers; S72. Reactivate the main longitudinal movement cylinders on the first and second main support legs to drive the main frame forward by 1 / 4 span until it reaches the next pouring position; S73. The rear auxiliary support leg moves forward by 1 / 4 of the stride.

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