Efficient construction device and method for UHPC thin-wall shell bent cap

Abstract

The invention provides a UHPC thin-wall shell cover beam efficient construction device and method.The UHPC thin-wall shell cover beam efficient construction device comprises a trolley arranged on a soil body in a sliding mode, a movable plate is arranged on the lower portion of the trolley, the bottom of the movable plate is connected with an inner support through a first telescopic cylinder, the inner support is detachably arranged in an inner mold, a foundation pit is formed in the soil body, and a bottom mold is supported in the foundation pit; the inner die can move in the direction perpendicular to the bottom die, a gap is formed between the bottom die and the inner die, and the UHPC in the bottom die is die-cast into the gap to form a shell by adjusting the position of the inner die. The construction method is reasonable in design, the construction efficiency of the UHPC bent cap can be greatly improved, it is guaranteed that the construction precision is high, the construction quality is stable, and good economic benefits are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction, and particularly relates to an efficient construction device and method for a UHPC thin-walled outer shell capping beam. Background Art

[0002] Capping beam construction is a commonly used process in bridge construction. With the development of technology, the advantages of UHPC concrete have gradually emerged. As a new type of concrete material, UHPC concrete has the characteristics of high strength, high durability, high toughness, good abrasion resistance and corrosion resistance. In bridge construction, the capping beam is an important structural part connecting the bridge pier and the bridge deck, bearing the load of the bridge and transmitting it to the bridge pier. There are the following advantages in using UHPC to make capping beams: High strength: Due to the extremely high strength of UHPC, the size and weight of the capping beam can be greatly reduced, thereby reducing the material consumption and construction difficulty. High durability: UHPC has excellent durability, can resist corrosion and wear under harsh environmental conditions, and extend the service life of the bridge. Good seismic performance: UHPC has high toughness and ductility, can absorb and disperse seismic energy, and improve the seismic performance of the bridge. Therefore, UHPC capping beams have broad application prospects in bridge construction, especially in occasions requiring high performance, long life and high safety, such as long-span bridges, bridges on important traffic lines, etc. At present, in the conventional construction of UHPC capping beams, all UHPC concrete is used. Due to the high overall cost and large manufacturing difficulty of UHPC, there are defects in its use. Summary of the Invention

[0003] The present invention provides an efficient construction device and method for a UHPC thin-walled outer shell capping beam, which solves the problems of troublesome construction operation, low construction efficiency and large occupation of construction site area in the construction of UHPC thin-walled outer shell capping beams.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: An efficient construction device for a UHPC thin-walled outer shell capping beam, including a trolley sliding on the soil body. An activity plate is arranged at the lower part of the trolley, and an inner support is connected to the bottom of the activity plate through a first telescopic cylinder. The inner support is detachably arranged inside the inner mold. A foundation pit is provided on the soil body, and a bottom mold is supported in the foundation pit. The inner mold can move in a direction perpendicular to the bottom mold. There is a gap between the bottom mold and the inner mold, and by adjusting the position of the inner mold, the UHPC concrete in the bottom mold is pressed into the gap to form a shell.

[0005] In a preferred solution, the trolley includes a frame, and a plurality of legs are symmetrically arranged on both sides of the frame respectively. Rollers are arranged at the bottoms of the legs, and guide rails are arranged on both sides of the top of the foundation pit. The rollers are slidably connected to the guide rails.

[0006] In a preferred solution, the bottom mold includes a sealing bottom plate, side molds and end molds are respectively arranged on both sides of the sealing bottom plate, and the side molds and end molds are respectively hinged to the sealing bottom plate; It also includes rib plates arranged on the side mold and the end mold. The rib plates are connected to the side wall of the foundation pit through hydraulic rods, and the bottom of the sealing bottom plate is supported by a support frame.

[0007] In a preferred solution, an installation seat is slidably arranged at the bottom of the movable plate. The first telescopic cylinder is arranged at the bottom of the installation seat, and the top rod of the first telescopic cylinder is detachably connected to the top of the internal support. A second telescopic cylinder is arranged at the bottom of the trolley. The second telescopic cylinder is connected to the upper part of the movable plate through a hinge seat. A plurality of electric hoists are symmetrically arranged on both sides of the trolley. The electric hoists are connected to the movable plate through cables, and electric hoists are also detachably arranged on both sides of the movable plate.

[0008] In a preferred solution, the movable plate includes a plate body. Two slide rails are arranged in parallel on the plate body. A third telescopic cylinder is arranged between the two slide rails. Two slide ways are arranged through the installation seat. The slide rails are slidably arranged in the slide ways. One end of the third telescopic cylinder is connected to the plate body through a hinge seat, and the other end of the third telescopic cylinder is connected to the installation seat. A plurality of convex plates are arranged on the installation seat, and the first telescopic cylinder is connected to the convex plates through a hinge seat.

[0009] In a preferred solution, a guiding component is detachably arranged in the middle of the installation seat. The guiding component is used to keep a plurality of first telescopic cylinders in a synchronous vertical state. A plurality of clamping plates are arranged circumferentially on the guiding component. The clamping plates are connected with sleeves through screws, and the sleeves are sleeved on the first telescopic cylinders; A box sleeve is arranged in the middle of the guiding component. A second threaded hole is arranged in the box sleeve. A plurality of through holes are arranged outside the second threaded hole. A plurality of first threaded holes are arranged on the installation seat, and the screws are arranged in the through holes and the first threaded holes; A positioning block is arranged on the upper part of the internal support, and the positioning block is inserted and connected with the box sleeve.

[0010] In a preferred solution, an ear plate is arranged outside the clamping plate, and a vertical plate and a horizontal plate are arranged outside the sleeve. The clamping plate and the vertical plate are connected through screws and nuts, and the ear plate and the horizontal plate are connected through screws and nuts; The internal support includes two support frames arranged oppositely. The top of the support frame is detachably connected to the first telescopic cylinder. A plurality of hinge plates are arranged on the lower side of the support frame. The two opposite support frames are hinged through a shaft rod, and the shaft rod is arranged through the hinge plates. The positioning block is arranged on the top of the support frame. There is a gap between the two opposite positioning blocks. The outer side wall of the support frame abuts against the inner side wall of the inner mold. A wedge block is inserted in the gap, and the wedge block is used to keep the two support frames stable. A pressing plate assembly is arranged in the second threaded hole. The pressing plate assembly includes a screw rod and a contact disk. The screw rod is arranged in the second threaded hole, and a spoke wheel is detachably arranged on the screw rod. The spoke wheel is used to drive the screw rod to rotate so as to fit the contact disk on the installation seat.

[0011] In a preferred embodiment, gears are respectively provided on both sides of the movable plate. The gears are fixed to the movable plate through pin shafts. Adjusting plates are respectively provided on both sides of the support legs along the moving direction of the trolley. The adjusting plate includes a fixed plate, and L-shaped plates are provided on both sides of the fixed plate. A waist-shaped circular hole is provided on the fixed plate, and a third threaded hole is provided on the L-shaped plate. One side of the fixed plate and the L-shaped plate is attached to the side wall of the movable plate. The gear is located between the two adjusting plates. There is a notch between the two L-shaped plates. The fixed plate and the L-shaped plate cooperate to form a sealed space. An adjusting block is detachably provided inside the adjusting plate. A fourth threaded hole is provided on the adjusting block. A rotating rod is inserted into the fourth threaded hole and the waist-shaped circular hole, and the rotating rod is threadedly connected to the fourth threaded hole. A screw is provided in the third threaded hole, and the end of the screw abuts against the adjusting block. Discs and cross bars are respectively provided on both sides of the rotating rod. A rack is meshingly connected to the waist-shaped circular hole, and a T-shaped groove is provided on the rack. The disc is inserted into the T-shaped groove. Distance sensors are provided on both sides of the movable plate. The distance sensors are used to detect the position and distance between the movable plate and the bottom mold.

[0012] In a preferred embodiment, a construction method of an efficient construction device for a UHPC thin-walled outer shell capping beam includes the following steps: S1. Excavate a foundation pit in the soil body and level the foundation pit. S2. Install a bottom mold in the foundation pit, install a guide rail on the upper part of the soil body, and assemble the trolley. S3. Assemble the inner mold and the inner support outside the foundation pit. S4. Pour UHPC concrete into the bottom mold and vibrate on the outside of the bottom mold. S5. Move the trolley to one side and fix it. Install the inner mold and the inner support on the trolley to form a die-casting module and debug it. S6. Move the die-casting module above the foundation pit, lower the inner mold and the inner support, and at the same time adjust the positions of the inner mold and the inner support relative to the bottom mold. S7. Extend the inner mold into the bottom mold and apply a downward force until the UHPC concrete is pressed into the gap. S8. Continue to press down the inner mold to ensure that the size of the UHPC thin-walled outer shell meets the design requirements and then lock the state. S9. After the UHPC thin-walled outer shell reaches the demolding strength, demold it. S10. Open the bottom mold, and at the same time release the connection between the inner mold and the inner support, and remove the inner support. S11. Fill the foundation pit with water and lay a cover plate on the top of the foundation pit for sealing. S12. After the curing is completed, drain the water, and hoist the UHPC thin-walled outer shell out of the foundation pit by using the lifting lugs provided on the inner mold.

[0013] In a preferred solution, in S3 and S5, the trolley is fixed by an anchoring system arranged on the soil body. In S6, a U-shaped limit card is further arranged on the upper side of the inner mold, and the limit card cooperates with the outer side of the bottom mold. In S11, the water temperature is maintained at 90 °C.

[0014] The beneficial effects of the present invention are as follows: By excavating a foundation pit in the soil body, the occupation of space is reduced. Since the usage amount of the cap beam is large, the problems of road and site occupation during construction are greatly reduced. An activity plate and a mounting seat are arranged on the trolley, which facilitates the hoisting of the internal support and the internal module, and is convenient to use. At the same time, the arranged guiding assembly ensures high precision during die casting. In order to further improve the overall die casting effect, an electric hoist with a posture adjustment function is arranged on the trolley. The two electric hoists cooperate with the second telescopic cylinder to adjust the angle of the activity plate within a certain range, so as to ensure the stability of the internal support and the internal module located below the activity plate during die casting. The rotating rod and the adjusting block arranged on the support leg can adjust the position of the rack, so as to engage and lock the gear on the activity plate, ensuring the fixation of the position of the activity plate. The overall operation is convenient and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the drawings and embodiments: Figure 1 is a schematic diagram of the present invention; Figure 2 is Figure 1 the top view schematic diagram of Figure 3 is Figure 1 the front view schematic diagram of Figure 4 is Figure 1 the left view schematic diagram of Figure 5 is Figure 1 the first state of the exploded view of Figure 6 is Figure 1 the second state of the exploded view of Figure 7 is Figure 1 the third state of the exploded view of Figure 8 is Figure 1 the fourth state of the exploded view of Figure 9 is Figure 1 the fifth state of the exploded view of Figure 10 is the overall structural schematic diagram of the internal support of the present invention; Figure 11 is Figure 10 the exploded view of Figure 12 is the connection schematic diagram of the mounting seat and the first telescopic cylinder of the present invention; Figure 13 is Figure 12 exploded view state one of Figure 14 is Figure 12 exploded view state two of Figure 15 is Figure 14 enlarged view of part A of Figure 16 is the exploded schematic diagram of the trolley and the movable plate of the present invention; Figure 17 is Figure 16 enlarged view of part B of Figure 18 is the schematic diagram of the construction process of the present invention Figure One ; Figure 19 is the schematic diagram of the construction process of the present invention Figure Two ; Figure 20 is the schematic diagram of the construction process of the present invention Figure Three ; Figure 21 is the schematic diagram of the construction process of the present invention Figure Four ; Figure 22 is the schematic diagram of the construction process of the present invention Figure Five .

[0016] In the figure: soil body 1; foundation pit 2; bottom formwork 3; sealing bottom plate 301; side formwork 302; end formwork 303; support frame 304; rib plate 305; trolley 4; frame 401; leg 402; roller 403; adjusting plate 404; waist circular hole 405; third threaded hole 406; adjusting block 407; fourth threaded hole 408; rack 409; T-shaped groove 410; rotating rod 411; disc 412; cross rod 413; fixing plate 414; L-shaped plate 415; notch 416; movable plate 5; plate body 501; slide rail 502; third telescopic cylinder 503; gear 504; pin shaft 505; inner formwork 6; inner support 7; support frame 701; alignment block 702; shaft rod 703; hinge plate 704; wedge block 705; gap 8; electric hoist 9; guide rail 10; mounting seat 11; slideway 1101; convex plate 1102; first threaded hole 1103; first telescopic cylinder 12; guiding component 13; clamping plate 1301; ear plate 1302; box sleeve 1303; through hole 1304; second threaded hole 1305; sleeve 1306; vertical plate 1307; horizontal plate 1308; screw 14; pressing plate assembly 15; screw rod 1501; contact disc 1502; spoke wheel 1503; second telescopic cylinder 16; hinge seat 17; cable 18; U-shaped limit clamp 19; anchoring system 20; cover plate 21; lifting lug 22. Detailed implementation manners

[0017] As Figures 1 - 4In it, a high-efficiency construction device for a UHPC thin-walled outer shell capping beam includes a trolley 4 slid on the soil body 1. An activity plate 5 is arranged at the lower part of the trolley 4. The bottom of the activity plate 5 is connected with an inner support 7 through a first telescopic cylinder 12. The inner support 7 is detachably arranged in the inner mold 6. A foundation pit 2 is arranged on the soil body 1. A bottom mold 3 is supported in the foundation pit 2. The inner mold 6 can move along the direction perpendicular to the bottom mold 3. A gap 8 is arranged between the bottom mold 3 and the inner mold 6. By adjusting the position of the inner mold 6, the UHPC concrete in the bottom mold 3 is die-cast into the gap 8 to form a shell. With this structure, the trolley 4 can adjust the positions of the inner mold 6 and the inner support 7 as needed, and then, according to the production rhythm, at the appropriate time node, move the inner mold 6 and the inner support 7 from the outside of the foundation pit 2 into the bottom mold 3. After the trolley 4 is fixed and locked, the inner mold 6 is pressed down to die-cast the UHPC concrete into the gap 8 to form a shell, with high production efficiency and reduced site occupation at the same time.

[0018] As Figures 6 - 9 In it, in the preferred solution, the trolley 4 includes a frame 401. A plurality of legs 402 are symmetrically arranged on both sides of the frame 401. A roller 403 is arranged at the bottom of the leg 402. Guide rails 10 are arranged on both sides of the top of the foundation pit 2. The roller 403 is slidably connected with the guide rail 10. A locking screw is arranged on the leg 402, and an anchoring point is arranged at the corresponding position of the guide rail 10. When the trolley 4 moves in place, the locking screw and the anchoring point are connected, thereby ensuring the sufficient fixation of the trolley 4 and avoiding shaking during the die-casting process of the inner mold 6, which affects the pouring accuracy.

[0019] As Figure 5 In it, in the preferred solution, the bottom mold 3 includes a sealing bottom plate 301. Side molds 302 and end molds 303 are respectively arranged on both sides of the sealing bottom plate 301. The side mold 302 and the end mold 303 are respectively hinged to the sealing bottom plate 301; It further includes rib plates 305 arranged on the side mold 302 and the end mold 303. The rib plates 305 are connected with the side wall of the foundation pit 2 through hydraulic rods. A support frame 304 is supported at the bottom of the sealing bottom plate 301. The rib plates 305 can stably open / close the mold under the action of the hydraulic rods, thereby providing a stable closed space for the UHPC concrete and ensuring the overall structural stability of the UHPC concrete under the extrusion action from the inner mold 6, with a long service life.

[0020] As Figures 12 - 15Among them, in the preferred solution, a mounting seat 11 is slidably provided at the bottom of the movable plate 5. The first telescopic cylinder 12 is arranged at the bottom of the mounting seat 11. The top rod of the first telescopic cylinder 12 is detachably connected to the top of the inner support 7. A second telescopic cylinder 16 is provided at the bottom of the trolley 4. The second telescopic cylinder 16 is connected to the upper part of the movable plate 5 through a hinge seat 17. A plurality of electric hoists 9 are symmetrically arranged on both sides of the trolley 4. The electric hoists 9 are connected to the movable plate 5 through cables 18. Electric hoists 9 are also detachably provided on both sides of the movable plate 5. With this structure, after the position of the movable plate 5 relative to the trolley 4 is locked, the electric hoists 9 above the movable plate 5 can further fix the movable plate 5 from both sides, and the electric hoists 9 below the movable plate 5 can hoist the inner mold 6 and the inner support 7. The overall hoisting is convenient and the operation is convenient.

[0021] In the preferred solution, the movable plate 5 includes a plate body 501. Two slide rails 502 are arranged in parallel on the plate body 501. A third telescopic cylinder 503 is arranged between the two slide rails 502. Two slide ways 1101 penetrate through the mounting seat 11. The slide rails 502 are slidably arranged in the slide ways 1101. One end of the third telescopic cylinder 503 is connected to the plate body 501 through a hinge seat 17. The other end of the third telescopic cylinder 503 is connected to the mounting seat 11. A plurality of convex plates 1102 are arranged on the mounting seat 11. The first telescopic cylinder 12 is connected to the convex plates 1102 through a hinge seat 17. With this structure, the movable plate 5 serves as a transfer structure, which can provide a support foundation for the mounting seat 11 and facilitate the lateral position adjustment of the mounting seat 11, so as to align the inner mold 6 with the bottom mold 3 and ensure the pouring accuracy and quality.

[0022] Such as Figures 10 - 11 Among them, in the preferred solution, a guiding component 13 is detachably arranged in the middle of the mounting seat 11. The guiding component 13 is used to keep a plurality of first telescopic cylinders 12 in a synchronous vertical state. A plurality of clamping plates 1301 are arranged on the guiding component 13 along the circumferential direction. The clamping plates 1301 are connected with a sleeve 1306 through screws 14. The sleeve 1306 is sleeved on the first telescopic cylinder 12; A box sleeve 1303 is arranged in the middle of the guiding component 13. A second threaded hole 1305 is arranged in the box sleeve 1303. A plurality of through holes 1304 are arranged outside the second threaded hole 1305. A plurality of first threaded holes 1103 are arranged on the mounting seat 11. The screws 14 are arranged in the through holes 1304 and the first threaded holes 1103; A positioning block 702 is arranged on the upper part of the inner support 7. The positioning block 702 is inserted into the box sleeve 1303. With this structure, after the pouring is completed, the inner mold 6 and the UHPC thin-walled shell form an integral body. A plurality of shear studs are arranged on the inner mold 6. At the same time, the cooperation between the positioning block 702 and the box sleeve 1303 ensures the smooth operation of the whole and high precision.

[0023] In a preferred embodiment, an ear plate 1302 is provided on the outer side of the clamping plate 1301, and a vertical plate 1307 and a horizontal plate 1308 are provided on the outer side of the sleeve 1306. The clamping plate 1301 and the vertical plate 1307 are connected by screws 14 and nuts, and the ear plate 1302 and the horizontal plate 1308 are connected by screws 14 and nuts; The inner support 7 includes two support frames 701 arranged oppositely. The top of the support frame 701 is detachably connected to the first telescopic cylinder 12. A plurality of hinge plates 704 are provided on the lower side of the support frame 701. Two opposite support frames 701 are hinged by a shaft rod 703. The shaft rod 703 passes through the hinge plate 704. The alignment block 702 is arranged on the top of the support frame 701. There is a gap between two opposite alignment blocks 702. The outer side wall of the support frame 701 abuts against the inner side wall of the inner mold 6. A wedge block 705 is inserted into the gap. The wedge block 705 is used to keep the two support frames 701 in a stable state. A pressing plate assembly 15 is arranged in the second threaded hole 1305. The pressing plate assembly 15 includes a screw rod 1501 and a contact disc 1502. The screw rod 1501 passes through the second threaded hole 1305. A spoke wheel 1503 is detachably arranged on the screw rod 1501. The spoke wheel 1503 is used to drive the screw rod 1501 to rotate so as to fit the contact disc 1502 on the mounting seat 11. With this structure, the guiding assembly 13 can ensure that the first telescopic cylinders 12 at different positions maintain a synchronous movement state, and the overall operation effect is better, thereby ensuring that the box sleeve 1303 moves only in the vertical direction with high movement positioning accuracy. When the pouring is completed and disassembly is required, the wedge block 705 is taken out, and then the state between the two support frames 701 is released. The support frames 701 rotate inwardly to disengage from the inner template 6, and finally, under the action of the electric hoist 9 and the cable 18, they are disengaged from the foundation pit 2.

[0024] As Figures 16 - 17 In the [reference], in a preferred embodiment, gears 504 are respectively provided on both sides of the movable plate 5. The gears 504 are fixed to the movable plate 5 by pin shafts 505. Adjusting plates 404 are respectively provided on both sides of the support legs 402 along the moving direction of the trolley 4. The adjusting plate 404 includes a fixing plate 414, and L-shaped plates 415 are provided on both sides of the fixing plate 414; The fixing plate 414 is provided with an oblong hole 405, and the L-shaped plate 415 is provided with a third threaded hole 406. One side of the fixing plate 414 and the L-shaped plate 415 is attached to the side wall of the movable plate 5. The gear 504 is located between the two adjusting plates 404. There is a notch 416 between the two L-shaped plates 415. The fixing plate 414 and the L-shaped plate 415 cooperate to form a sealed space. The adjusting plate 404 is detachably provided with an adjusting block 407. The adjusting block 407 is provided with a fourth threaded hole 408. The rotating rod 411 is inserted into the fourth threaded hole 408 and the oblong hole 405. The rotating rod 411 is threadedly connected to the fourth threaded hole 408. A screw 14 is provided in the third threaded hole 406. The end of the screw 14 abuts against the adjusting block 407. Discs 412 and cross rods 413 are respectively arranged on both sides of the rotating rod 411. A rack 409 is meshed with the oblong hole 405. The rack 409 is provided with a T-shaped groove 410. The disc 412 is inserted into the T-shaped groove 410. Distance sensors are arranged on both sides of the movable plate 5. The distance sensors are used to detect the position and distance between the movable plate 5 and the bottom die 3. Due to inevitable manufacturing errors and installation errors, and being restricted by the site environment, after the trolley 4 moves above the bottom die 3 during long-term use, it is very difficult to ensure absolute matching between the bottom die 3 and the inner die 6. On the contrary, there is often a change in the pitch angle. The distance sensors at least include one of an infrared sensor, an ultrasonic sensor and an optical distance sensor. The state between the movable plate 5 and the bottom die 3 can be obtained in real time through the distance sensors. When there is a certain angular deviation between the movable plate 5 and the bottom die 3, the angles between them are different. The distance sensors are installed on the counterweight. The counterweight and the movable plate 5 are hinged. That is, under the self-weight of the counterweight, no matter what angle the movable plate 5 is in, the measurement of the distance sensors remains facing the bottom die 3, thereby improving the overall response speed and measurement accuracy. The inclination angle of the movable plate 5 can be flexibly adjusted by the electric hoist 9 arranged on the trolley 4. At the same time, the second telescopic cylinder 16 can adjust the position of the movable plate 5, which is convenient to use, ensures the angle of die casting of the inner die 6, thereby ensuring uniform side wall thickness of the UHPC thin-walled shell and stable pouring quality.

[0025] As Figures 18 - 22 In the preferred solution, a construction method of a high-efficiency construction device for a UHPC thin-walled shell capping beam includes the following steps: S1. Excavate a foundation pit 2 in the soil body 1 and level the foundation pit 2; S2. Install the bottom die 3 in the foundation pit 2, install the guide rail 10 on the upper part of the soil body 1, and assemble the trolley 4; S3. Assemble the inner die 6 and the inner support 7 outside the foundation pit 2; S4. Pour UHPC concrete into the bottom die 3 and vibrate the outside of the bottom die 3; S5. Move the trolley 4 to one side and fix it. Install the inner mold 6 and the inner support 7 on the trolley 4 to form a die-casting module, and conduct debugging; S6. Move the die-casting module above the foundation pit 2, lower the inner mold 6 and the inner support 7, and at the same time adjust the positions of the inner mold 6 and the inner support 7 relative to the bottom mold 3; S7. Insert the inner mold 6 into the bottom mold 3 and apply downward force until the UHPC concrete is pressed into the gap 8; S8. Continue to press down the inner mold 6, and lock the state after ensuring that the size of the UHPC thin-walled shell meets the design; S9. After the UHPC thin-walled shell reaches the demolding strength, conduct demolding; S10. Open the bottom mold 3, and at the same time release the connection between the inner mold 6 and the inner support 7, and remove the inner support 7; S11. Fill the foundation pit 2 with water, and lay a cover plate 21 on the top of the foundation pit 2 for sealing; S12. After the curing is completed, drain the water, and hoist through the lifting lugs 22 provided on the inner mold 6 to move the UHPC thin-walled shell out of the foundation pit 2.

[0026] Among them: The components of UHPC are 700 - 900 kg / cubic meter of 525 ordinary portland cement, 50 - 200 kg / cubic meter of silica fume (grade 94), 30 - 100 kg / cubic meter of fly ash microspheres (400 mesh), quartz sand (20 - 40 mesh, 40 - 70 mesh, 70 - 120 mesh, in a mass ratio of 3:6:1, 850 - 1100 kg / cubic meter), 1 - 10 kg / cubic meter of a new type of composite expansion agent, 5 - 15 kg / cubic meter of a high-performance powder water reducer, 0.1 - 1.5 kg / cubic meter of a defoaming component, 0.1 - 0.5 kg / cubic meter of a viscosity-reducing component, 150 - 230 kg / cubic meter of copper-plated straight steel fibers (13 mm), and 145 - 170 kg / cubic meter of water. The steam-cured compressive strength of UHPC is between 170 - 220 MPa, and the flexural strength is between 30 - 38 MPa.

[0027] In the preferred solution, in S3 and S5, the trolley 4 is fixed through the anchoring system 20 provided on the soil body 1. In S6, a U-shaped limit card 19 is also provided on the upper side of the inner mold 6, and the limit card cooperates with the outer side of the bottom mold 3. In S11, the water temperature is maintained at 90 °C.

[0028] The above embodiments are only the preferred technical solutions of the present invention, and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An efficient construction device for UHPC thin-walled outer shell capping beam, characterized in that: It includes a trolley (4) sliding on the soil mass (1). An activity plate (5) is arranged at the lower part of the trolley (4). The bottom of the activity plate (5) is connected with an internal support (7) through a first telescopic cylinder (12). The internal support (7) is detachably arranged in the internal mold (6). A foundation pit (2) is provided on the soil mass (1). A bottom mold (3) is supported in the foundation pit (2). The internal mold (6) can move along the direction perpendicular to the bottom mold (3). A gap (8) is provided between the bottom mold (3) and the internal mold (6). By adjusting the position of the internal mold (6), the UHPC concrete in the bottom mold (3) is die-cast into the gap (8) to form a shell.

2. The high-efficiency construction device for the UHPC thin-walled outer casing capping beam according to claim 1, wherein: The trolley (4) includes a frame (401). A plurality of legs (402) are symmetrically arranged on both sides of the frame (401). Wheels (403) are provided at the bottoms of the legs (402). Guide rails (10) are provided on both sides of the top of the foundation pit (2). The wheels (403) are slidably connected with the guide rails (10).

3. The high-efficiency construction device for the UHPC thin-walled outer shell capping beam according to claim 1, characterized in that: The bottom mold (3) includes a sealing bottom plate (301). Side molds (302) and end molds (303) are respectively arranged on both sides of the sealing bottom plate (301). The side molds (302) and the end molds (303) are respectively hinged to the sealing bottom plate (301). It also includes rib plates (305) arranged on the side molds (302) and the end molds (303). The rib plates (305) are connected with the side walls of the foundation pit (2) through hydraulic rods. A support frame (304) is supported at the bottom of the sealing bottom plate (301).

4. The high-efficiency construction device for a UHPC thin-walled outer shell capping beam according to claim 1, characterized in that: An installation seat (11) is slidably arranged at the bottom of the activity plate (5). The first telescopic cylinder (12) is arranged at the bottom of the installation seat (11). The ejector rod of the first telescopic cylinder (12) is detachably connected with the top of the internal support (7). A second telescopic cylinder (16) is arranged at the bottom of the trolley (4). The second telescopic cylinder (16) is connected with the upper part of the activity plate (5) through a hinge seat (17). A plurality of electric hoists (9) are symmetrically arranged on both sides of the trolley (4). The electric hoists (9) are connected with the activity plate (5) through cables (18). Electric hoists (9) are also detachably arranged on both sides of the activity plate (5).

5. The high-efficiency construction device for a UHPC thin-walled outer casing capping beam according to claim 5, characterized in that: The activity plate (5) includes a plate body (501). Two slide rails (502) are arranged in parallel on the plate body (501). A third telescopic cylinder (503) is arranged between the two slide rails (502). Two slide ways (1101) penetrate through the installation seat (11). The slide rails (502) are slidably arranged in the slide ways (1101). One end of the third telescopic cylinder (503) is connected with the plate body (501) through a hinge seat (17). The other end of the third telescopic cylinder (503) is connected with the installation seat (11). A plurality of convex plates (1102) are arranged on the installation seat (11). The first telescopic cylinder (12) is connected with the convex plates (1102) through a hinge seat (17).

6. The high-efficiency construction device for the UHPC thin-walled outer casing capping beam according to claim 5, characterized in that: A guiding component (13) is detachably arranged in the middle of the installation seat (11). The guiding component (13) is used to keep a plurality of first telescopic cylinders (12) in a synchronous vertical state. A plurality of clamping plates (1301) are arranged on the guiding component (13) along the circumferential direction. The clamping plates (1301) are connected with sleeves (1306) through screws (14). The sleeves (1306) are sleeved on the first telescopic cylinders (12). In the middle of the guiding component (13), there is a box sleeve (1303). Inside the box sleeve (1303), there is a second threaded hole (1305). Outside the second threaded hole (1305), there are multiple through holes (1304). On the mounting seat (11), there are multiple first threaded holes (1103). The screw (14) passes through the through holes (1304) and the first threaded holes (1103). On the upper part of the inner support (7), there is a positioning block (702). The positioning block (702) is inserted into the box sleeve (1303).

7. The high-efficiency construction device for a UHPC thin-walled outer shell capping beam according to claim 6, wherein: On the outside of the clamping plate (1301), there is an ear plate (1302). On the outside of the sleeve (1306), there are a vertical plate (1307) and a horizontal plate (1308). The clamping plate (1301) and the vertical plate (1307) are connected by screws (14) and nuts. The ear plate (1302) and the horizontal plate (1308) are connected by screws (14) and nuts. The inner support (7) includes two support frames (701) arranged oppositely. The tops of the support frames (701) are detachably connected to the first telescopic cylinder (12). On the lower sides of the support frames (701), there are multiple hinge plates (704). The two opposite support frames (701) are hinged by a shaft rod (703). The shaft rod (703) passes through the hinge plates (704). The positioning block (702) is arranged on the top of the support frame (701). There is a gap between the two opposite positioning blocks (702). The outer side walls of the support frames (701) abut against the inner side walls of the inner mold (6). A wedge block (705) is inserted into the gap. The wedge block (705) is used to keep the two support frames (701) stable. Inside the second threaded hole (1305), there is a pressing plate assembly (15). The pressing plate assembly (15) includes a screw rod (1501) and a contact disk (1502). The screw rod (1501) passes through the second threaded hole (1305). A spoke wheel (1503) is detachably arranged on the screw rod (1501). The spoke wheel (1503) is used to drive the screw rod (1501) to rotate so as to make the contact disk (1502) fit on the mounting seat (11).

8. The high-efficiency construction device for a UHPC thin-walled outer casing capping beam according to claim 2, wherein: On both sides of the movable plate (5), there are respectively gears (504). The gears (504) are fixed to the movable plate (5) by pin shafts (505). On both sides of the supporting legs (402) along the moving direction of the trolley (4), there are respectively adjusting plates (404). The adjusting plates (404) include fixing plates (414). On both sides of the fixing plates (414), there are L-shaped plates (415). Distance sensors are arranged on both sides of the movable plate (5). The distance sensors are used to detect the position and distance between the movable plate (5) and the bottom mold (3). The fixing plate (414) is provided with an oblong hole (405), the L-shaped plate (415) is provided with a third threaded hole (406), one side of the fixing plate (414) and the L-shaped plate (415) is attached to the side wall of the movable plate (5), the gear (504) is located between the two adjusting plates (404), a notch (416) is provided between the two L-shaped plates (415), the fixing plate (414) and the L-shaped plate (415) cooperate to form a sealed space, the adjusting plate (404) is detachably provided with an adjusting block (407), the adjusting block (407) is provided with a fourth threaded hole (408), the rotating rod (411) is inserted into the fourth threaded hole (408) and the oblong hole (405), the rotating rod (411) is threadedly connected to the fourth threaded hole (408), a screw (14) is provided in the third threaded hole (406), and the end of the screw (14) abuts against the adjusting block (407). Discs (412) and cross bars (413) are respectively provided on both sides of the rotating rod (411). A rack (409) is meshed with the oblong hole (405), and a T-shaped groove (410) is provided on the rack (409). The disc (412) is inserted into the T-shaped groove (410).

9. The construction method of a high-efficiency construction device for a UHPC thin-walled outer casing capping beam according to any one of claims 1 to 8, characterized in that: It includes the following steps: S1. Excavate a foundation pit (2) in the soil mass (1) and level the foundation pit (2); S2. Install a bottom mold (3) in the foundation pit (2), install a guide rail (10) on the upper part of the soil mass (1), and assemble a trolley (4); S3. Assemble an inner mold (6) and an inner support (7) outside the foundation pit (2); S4. Pour UHPC concrete into the bottom mold (3) and vibrate the outside of the bottom mold (3); S5. Move the trolley (4) to one side and fix it. Install the inner mold (6) and the inner support (7) on the trolley (4) to form a die-casting module and debug it; S6. Move the die-casting module above the foundation pit (2), lower the inner mold (6) and the inner support (7), and at the same time adjust the positions of the inner mold (6) and the inner support (7) relative to the bottom mold (3); S7. Extend the inner mold (6) into the bottom mold (3) to apply a downward force until the UHPC concrete is pressed into the gap (8); S8. Continue to press down the inner mold (6) to ensure that the size of the UHPC thin-walled shell meets the design requirements and then lock the state; S9. After the UHPC thin-walled shell reaches the demolding strength, demold it; S10. Open the bottom mold (3), and at the same time release the connection between the inner mold (6) and the inner support (7), and remove the inner support (7); S11. Fill the foundation pit (2) with water and lay a cover plate on the top of the foundation pit (2) for sealing; S12. After the curing is completed, drain the water, and hoist it through the lifting lugs provided on the inner mold (6) to remove the UHPC thin-walled shell from the foundation pit (2).

10. The construction method of an efficient construction device for a UHPC thin-walled outer casing capping beam according to claim 1, characterized in that: In S3 and S5, the trolley (4) is fixed by an anchoring system provided on the soil mass (1). In S6, a U-shaped limit card is further provided on the upper side of the inner mold (6), and the limit card cooperates with the outside of the bottom mold (3). In S11, the water temperature is maintained at 90 °C.

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