Construction device and method for asymmetric cast-in-place cantilever beam support structure

Abstract

The present invention provides a construction device of an asymmetric cast-in-place cantilever beam support structure, comprising two pile caps arranged opposite to each other, outer foundations are respectively arranged on the outer sides of the pile caps along the direction of the center line of the two pile caps, the two outer foundations are connected by a hanger, the hanger is arranged on the upper side of the pile caps, a gap is arranged in the middle of the two pile caps, an intermediate support is supported in the middle of the two outer foundations, the intermediate support is located at the gap, the intermediate support penetrates the gap and extends outward, and templates and tripods are detachably arranged on the outer foundations and the intermediate support, and the templates and tripods are used to provide a sealed space for casting the cast-in-place beam. The present invention has an ingenious structure, and provides a lap foundation through the pile caps, so that the main beam is cantilevered on the outer side of the pile caps, and the distribution beam is used to fill the gap between the double pile caps, so as to provide a strong construction foundation for casting, greatly improve the construction efficiency and save costs, and at the same time, the distribution beam as an extension space ensures the safe and efficient operation of the construction personnel.

Description

Technical Field

[0001] The invention relates to the technical field of support system construction, and in particular to a construction device and method for an asymmetric cast-in-place cantilever beam support structure. Background Art

[0002] The bottom of the cast-in-place cantilever beam has no support, and due to the construction environment, the support frame cannot meet the process requirements. The conventional process is to embed iron parts as the bottom mold support point when pouring the bottom pile cap, but the pre-embedding of iron parts is time-consuming and labor-intensive, and the subsequent treatment is extremely difficult. After long-term corrosion, the pile cap body will be corroded, posing a great quality risk. Especially in the face of offshore construction environments, the constraints are more obvious, and the difficulty of construction is greatly increased.

[0003] Chinese patent document CN 112832141 A records a cast-in-place beam cantilever structure and construction method, but the structure mainly uses bottom support rods for force bearing. However, when facing offshore working conditions, the bottom cannot provide sufficiently effective support, and due to environmental influences, the construction and installation of the load-bearing bracket at the bottom is also very inconvenient. There are defects in use and improvements are needed. Summary of the invention

[0004] The present invention provides a construction device for an asymmetric cast-in-place cantilever beam support structure, which solves the problems of inconvenient operation due to the inability to form a stable support at the bottom under a limited construction environment, complex procedures for casting the cantilever beam, great safety hazards in construction, low construction efficiency, low repetition rate of components and high construction cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a construction device of an asymmetric cast-in-place cantilever beam support structure, comprising two pile caps arranged relatively to each other, outer foundations are respectively arranged on the outer sides of the pile caps along the center line direction of the two pile caps, the two outer foundations are connected by a hanger, the hanger is straddled on the upper side of the pile caps, a spacer is arranged in the middle of the two pile caps, an intermediate support is supported in the middle of the two outer foundations, the intermediate support is located at the spacer, the intermediate support passes through the spacer and extends outward, and a template and a tripod are detachably arranged on the outer foundation and the intermediate support, and the template and the tripod are used to provide a sealed space for casting the cast-in-place beam.

[0006] In the preferred scheme, the outer foundation includes two main beams, and the two main beams are connected by a connecting plate. A gap is set between the two main beams. The hanger includes a U-shaped rib, a sleeve is set in the middle of the U-shaped rib, the outer side of the sleeve is against the upper surface of the pile cap, both sides of the U-shaped rib are passed through the gap, and a washer is set at the bottom of the U-shaped rib. The U-shaped rib is connected to the main beam through a nut, and a sleeper is detachably provided on the upper part of the main beam. The sleeper includes a main body, and a chamfer is set on the side of the main body away from the pile cap. The main body is used to provide auxiliary support for the U-shaped rib.

[0007] In a preferred solution, the intermediate support includes a plurality of distribution beams arranged in parallel, at least two first through holes are respectively provided on both sides of the distribution beams, a correction rod is passed through the first through hole, the correction rod is connected to the distribution beam through a nut, the upper part of the distribution beam is supported by a panel, the upper surface of the panel coincides with the upper surface of the pile cap, and the outer side of the panel is in contact with the inner side of the pile cap.

[0008] In the preferred scheme, the middle support is connected to the outer foundation through a locking and fixing unit. The locking and fixing unit includes a round rod. The round rod is inserted into the gap on the outer foundation. The round rod is provided with a cover plate, a positioning plate, a clamping plate, a spring and a nut from top to bottom. The cover plate and the nut are respectively threadedly connected to the round rod. The width of the clamping plate matches the gap. The cover plate and the clamping plate clamp the middle support from both sides respectively.

[0009] In the preferred scheme, sliding grooves are respectively provided on both sides of the upper part of the round rod, and the first mounting hole and the second mounting hole are respectively provided in the middle of the positioning plate and the clamping plate, and sliders are symmetrically arranged in the first mounting hole and the second mounting hole, and the sliders and the sliding grooves are slidably connected, and a screw sleeve is provided on the upper part of the cover plate, and the screw sleeve and the round rod are threadedly connected, and a stop head is provided at the lower part of the cover plate, and the stop head is inclined to one side of the central axis of the cover plate, and a top support portion is provided on the side of the positioning plate away from the middle support.

[0010] In the preferred scheme, the cast-in-place beam includes an upper beam and a lower beam, the template includes a first bamboo plywood and a second bamboo plywood, a bending portion is provided in the middle of the second bamboo plywood, a sealing baffle is provided at the upper end of the second bamboo plywood, a tripod is arranged on the outside of the second bamboo plywood, the sealing baffle and the tripod are clamped, three first bamboo plywood and second bamboo plywood and the tripod are connected by a tensioning unit to form a casting space for the lower beam, four first bamboo plywood are connected by a tensioning unit to form a casting space for the upper beam, the tensioning unit includes a vertically arranged main beam and a secondary beam, the secondary beam is attached to the outside of the template, the main beam on the opposite side is connected and fixed by a tension rod, the lower beam includes a first contact portion and a second base portion, a negative angle transition surface is provided between the first contact portion and the second base portion, and a third contact portion is provided at the lower portion of the upper beam.

[0011] In the preferred scheme, a limit unit is provided on the side of the middle support close to the tripod, and the limit unit includes a plurality of support plates arranged in parallel, and the plurality of support plates are connected by a fixed plate, and at least two second through holes are provided on the support plate, and the support plate is sleeved on the correction rod, and a support plate is provided on the upper part of the fixed plate, and a first threaded hole is provided on the support plate, and an adjustment unit is provided in the first threaded hole, and the adjustment unit includes a threaded rod, and the threaded rod and the support plate are threadedly connected, a limit plate is provided on one side of the threaded rod, and a driving handle is provided on the limit plate, and a retaining ring and a second threaded hole are provided on the other side of the threaded rod, and the retaining ring abuts against the push plate, a through hole is provided in the middle of the push plate, and a countersunk hole is provided on one side of the through hole, a locking pin is provided in the countersunk hole, and the locking pin and the second threaded hole are threadedly connected.

[0012] In a preferred solution, the tripod comprises a first abutting portion and a second abutting portion, the shape of the first abutting portion matches the bending portion, a bayonet is provided between the first abutting portion and the second abutting portion, and the bending portion is clamped in the bayonet.

[0013] In a preferred embodiment, a construction method of an asymmetric cast-in-place cantilever beam support structure is characterized by comprising the following steps:

[0014] S1. The pile foundation pipe is hoisted in the water area, and then the pile cap is poured on the top of the pile foundation pipe;

[0015] S2. Pre-install the sleeve on the U-shaped rib, complete the welding of the main beam and the distribution beam, and open the first through hole on the distribution beam;

[0016] S3. Complete the connection between the U-shaped reinforcement and the main beam on both sides of the pile cap, and use sleepers to block the side walls of the U-shaped reinforcement and the pile cap, and then install the distribution beam in the middle of the main beam;

[0017] S4, the panel is used as an extended operating platform, and the pouring space of the lower beam is built by using the first bamboo plywood, the second bamboo plywood, the tripod and the tensioning unit, and then pouring;

[0018] S5, using the first bamboo plywood and the tensioning unit to build a casting space for the upper beam on the upper part of the cast lower beam, and then casting;

[0019] S6. After the overall pouring is completed, the tensioning unit, formwork and tripod are removed in sequence, and finally the middle support, outer foundation and sling are removed;

[0020] S7. Arrange each unit component and move to the next cantilever beam casting point.

[0021] In the preferred scheme, in S3, the distribution beam and the main beam are locked and fixed by locking and fixing units on the two outermost distribution beams, and the correcting rods are used to ensure the accurate position between the distribution beams. At the same time, the limiting unit and the adjusting unit are installed. In S4 and S5, the overall sealing needs to be ensured so that the shape of the negative angle transition surface meets the design requirements. During the process, the position of the adjusting unit needs to be adjusted to increase the support force on the lower part of the tripod and further limit the tripod.

[0022] The beneficial effects of the present invention are as follows: by placing the hanger horizontally on the pile cap, cantilevering the main beam at both ends, the main beams on both sides of the pile cap form a shoulder pole, and then fixing the distribution beam on the main beam at equal distances, laying the panel, thereby forming a cantilevered beam bottom formwork support. The asymmetric part of the beam is optimized by using a tripod and a template to ensure the accuracy and high quality of the construction, and the overall force is stable. During the construction process, the distribution beam and the main beam can be quickly connected by using a locking and fixing unit, and the parallel distribution beam is subject to the action of the correction rod and the limit unit. The overall position is relatively stable, avoiding the problem of slippage and dislocation during the construction process. The use of templates to establish a casting space can greatly improve the construction efficiency, and the overall disassembly can be reused, the materials are simple and easy to operate, the overall process is reasonable and safe and reliable, the feasibility is high, and it has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0024] Figure 1 This is the schematic diagram of the overall installation template of the present invention in state 1;

[0025] Figure 2 yes Figure 1 Schematic diagram of top view;

[0026] Figure 3 yes Figure 1 Schematic diagram of the left side;

[0027] Figure 4 yes Figure 1 A front view schematic diagram of

[0028] Figure 5 yes Figure 1 A bottom view schematic diagram of

[0029] Figure 6 This is the schematic diagram of the overall installation template of the present invention in state 2;

[0030] Figure 7 It is a schematic diagram of the pouring completed structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the installation of the hanger, the outer foundation and the intermediate support of the present invention;

[0032] Fig. 9 This is the schematic diagram of the lower beam casting structure of the present invention in state 1;

[0033] Fig.10 This is the second state of the lower beam casting structure schematic diagram of the present invention;

[0034] Fig.11 This is the schematic diagram of the upper beam casting structure of the present invention in state 1;

[0035] Fig.12 This is the second state of the upper beam casting structure schematic diagram of the present invention;

[0036] Fig.13 It is a schematic diagram of the second bamboo plywood and tripod installation structure of the present invention;

[0037] Fig.14 yes Fig.13 Schematic diagram of the explosion structure;

[0038] Fig.15 It is a schematic diagram of the structure of the locking and fixing unit of the present invention;

[0039] Fig.16 yes Fig.15 Schematic diagram of the explosion structure;

[0040] Fig.17 This is a schematic diagram of the installation structure of the limit unit and the adjustment unit of the present invention in state 1;

[0041] Fig.18 This is a schematic diagram of the installation structure of the limit unit and the adjustment unit of the present invention in state 2;

[0042] Fig.19 It is a schematic diagram of the structure of the regulating unit of the present invention;

[0043] Fig. 20 yes Figure 8 Schematic diagram of the left view structure;

[0044] Fig.21 yes Figure 8 Schematic diagram of the explosion structure.

[0045] In the figure: hanger 1; U-shaped rib 101; casing 102; pad 103; outer foundation 2; main beam 201; connecting piece 202; gap 203; middle support 3; distribution beam 301; panel 302; first through hole 303; pile cap 4; cast-in-place beam 5; upper beam 501; lower beam 502; first contact part 503; second foundation part 504; negative angle transition surface 505; third contact part 506; pile foundation pipe 6; sleeper 7; body 701; chamfer 702; correction rod 8; locking and fixing unit 9; round rod 901; cover plate 902; positioning plate 903; clamping plate 904; spring 905; screw sleeve 906; stop head 907; slide groove 908; first mounting hole 909; second mounting hole 910; slider 9 11; top support part 912; template 10; first bamboo plywood 1001; second bamboo plywood 1002; sealing baffle 1003; bending part 1004; tension unit 11; main rib 1101; secondary rib 1102; tie rod 1103; tripod 12; first abutment part 1201; second abutment part 1202; bayonet 1203; limiting unit 13; support plate 1301; second through hole 1302; fixing plate 1303; backing plate 1304; first threaded hole 1305; adjustment unit 14; threaded rod 1401; retaining ring 1402; push plate 1403; through hole 1404; countersunk hole 1405; locking pin 1406; limiting plate 1407; driving handle 1408; second threaded hole 1409; nut 15. DETAILED DESCRIPTION

[0046] like Figure 1-21 In the invention, a construction device of an asymmetric cast-in-place cantilever beam support structure is disclosed, comprising two pile caps 4 arranged opposite to each other, outer foundations 2 are respectively arranged on the outer sides of the pile caps 4 along the center line direction of the two pile caps 4, the two outer foundations 2 are connected by a hanger 1, the hanger 1 is straddled on the upper side of the pile caps 4, a spacer is arranged in the middle of the two pile caps 4, an intermediate support 3 is supported in the middle of the two outer foundations 2, the intermediate support 3 is located at the spacer, the intermediate support 3 passes through the spacer and extends outward, a template 10 and a tripod 12 are detachably arranged on the outer foundation 2 and the intermediate support 3, the template 10 and the tripod 12 are used to provide a sealed space for casting the cast-in-place beam 5. With this structure, the pile cap 4 is used as a load-bearing foundation to provide conditions for the installation of the outer foundation 2. The hanger 1 is used to construct a cantilever structure on both sides of the pile cap 4. The hanger 1 and the outer foundation 2 form a shoulder pole, and the force is fully and stably. The middle support 3 can fill the gap between the double pile caps 4, providing a bottom sealing space for the construction of the cantilever beam. The template 10 is made of wood, which is easy to obtain and can be reused many times and can be adjusted in size in time according to design needs. It has better versatility. The tripod 12 can provide sufficient support for the negative angle transition surface 505, and the overall sealing is guaranteed, meeting the size requirements of the negative angle transition surface 505 of the asymmetric cantilever beam. The overall installation is convenient, and the construction is safe and efficient.

[0047] In the preferred solution, the outer foundation 2 includes two main beams 201, and the two main beams 201 are connected by a connecting plate 202. A gap 203 is set between the two main beams 201. The hanger 1 includes a U-shaped rib 101. A sleeve 102 is set in the middle of the U-shaped rib 101. The outer side of the sleeve 102 abuts against the upper surface of the pile cap 4. Both sides of the U-shaped rib 101 are inserted into the gap 203. The bottom of the U-shaped rib 101 is sleeved with a washer 103. The U-shaped rib 101 is connected to the main beam 201 through a nut 15. The upper part of the main beam 201 is detachably provided with a sleeper 7. The sleeper 7 includes a main body 701. The side of the main body 701 away from the pile cap 4 is provided with a chamfer 702. The main body 701 is used to provide auxiliary support for the U-shaped rib 101. With this structure, the U-shaped rib 101 is made of round steel, a sleeve 102 is set in the middle of the round steel, the sleeve 102 is made of PVC pipe, and threads are set on both sides of the round steel. The main beam 201 is made of channel steel, which is welded with a connecting piece 202 to ensure stable force. The gap 203 can stabilize the U-shaped rib 101. The nut 15 can firmly compact the U-shaped rib 101 on the upper surface of the pile cap 4, and the sleeper 7 can fill the avoidance gap caused by the bending of both sides of the U-shaped rib 101, so that The main beam 201 is supported when it is bent and deformed. The top surface of the sleeper 7 coincides with the upper surface of the pile cap 4, which reduces the deformation tendency of the U-shaped reinforcement 101. After the cast-in-place crossbeam 5 is cast as a whole, it is only necessary to cut the bent part of the U-shaped reinforcement 101, and then remove the U-shaped reinforcement 101 from the casing 102 and seal the casing. The overall operation is fast, and since the casing occupies very little space, the bearing capacity of the lower crossbeam 502 will not be affected after the concrete is filled and sealed.

[0048] In the preferred solution, the middle support 3 includes a plurality of distribution beams 301 arranged in parallel, at least two first through holes 303 are respectively arranged on both sides of the distribution beam 301, and a correction rod 8 is inserted in the first through hole 303, and the correction rod 8 is connected to the distribution beam 301 through a nut 15, and the upper part of the distribution beam 301 supports a panel 302, the upper surface of the panel 302 coincides with the upper surface of the pile cap 4, and the outer side of the panel 302 fits the inner side of the pile cap 4. With this structure, the distribution beam 301 adopts an I-beam, and the overall force is stable. The plurality of correction rods 8 cooperate with the nut 15 to stably set and fix the position of the distribution beam 301, and the width of the support panel 302 matches the interval between the two pile caps 4. At the same time, the length of the panel 302 is greater than the width of the pile cap 4, providing a construction support foundation for construction personnel.

[0049] In the preferred embodiment, the middle support 3 is connected to the outer foundation 2 through a locking and fixing unit 9. The locking and fixing unit 9 includes a round rod 901. The round rod 901 is inserted into the gap 203 on the outer foundation 2. The round rod 901 is provided with a cover plate 902, a positioning plate 903, a clamping plate 904, a spring 905 and a nut 15 from top to bottom. The cover plate 902 and the nut 15 are respectively threadedly connected to the round rod 901. The width of the clamping plate 904 matches the gap 203. The cover plate 902 and the clamping plate 904 clamp the middle support 3 from both sides respectively. With this structure, the locking and fixing unit 9 can quickly fix the distribution beam 3 on the main beam 201. By adjusting the cover plate 902, the upper side of the distribution beam 301 is pressed, and the bottom nut 15 applies force to the spring 905 from the bottom, thereby pressing the clamping plate 904 from the bottom of the distribution beam 301, so that the distribution beam 301 can be stably fixed. During installation, the outer side of the positioning plate 903 and the outer side of the distribution beam 301 are fitted together, thereby ensuring the relative position is accurate each time it is fixed, the position where different distribution beams 301 are subjected to force is stable, and the overall fixing effect is better.

[0050] In the preferred scheme, slide grooves 908 are respectively provided on both sides of the upper part of the round rod 901, and the middle parts of the positioning plate 903 and the clamping plate 904 are respectively provided with a first mounting hole 909 and a second mounting hole 910, and sliders 911 are symmetrically arranged in the first mounting hole 909 and the second mounting hole 910, and the slider 911 and the slide groove 908 are slidably connected, and a screw sleeve 906 is provided on the upper part of the cover plate 902, and the screw sleeve 906 and the round rod 901 are threadedly connected, and a stop head 907 is provided on the lower part of the cover plate 902, and the stop head 907 is inclined to one side of the central axis of the cover plate 902, and a top support portion 912 is provided on the side of the positioning plate 903 away from the intermediate support 3. With this structure, the stop head 907 close to the outside of the cover plate 902 has a larger thickness, while the stop head 907 close to the center of the cover plate 902 has a smaller thickness. The height of the top support portion 912 is greater than the thickness of one side of the positioning plate close to the distribution beam 301. When the cover plate 902 is rotated, the top support portion 912 provides support for the stop head 907, thereby better compacting the distribution beam 301, ensuring stable force and convenient overall adjustment.

[0051] In the preferred solution, the cast-in-place beam 5 includes an upper beam 501 and a lower beam 502, the template 10 includes a first bamboo plywood 1001 and a second bamboo plywood 1002, a bending portion 1004 is provided in the middle of the second bamboo plywood 1002, a sealing baffle 1003 is provided at the upper end of the second bamboo plywood 1002, a tripod 12 is arranged on the outer side of the second bamboo plywood 1002, the sealing baffle 1003 and the tripod 12 are clamped, and the three first bamboo plywood 1001 and the second bamboo plywood 1002 and the tripod 12 are connected by the tensioning unit 11 to form the cast-in-place beam of the lower beam 502. The four first bamboo plywood sheets 1001 are connected by the tensioning unit 11 to form the casting space of the upper beam 501. The tensioning unit 11 includes a vertically arranged main beam 1101 and a secondary beam 1102. The secondary beam 1102 is attached to the outer side of the template 10. The main beam 1101 on the opposite side is connected and fixed by a tension rod 1103. The lower beam 502 includes a first contact portion 503 and a second base portion 504. A negative angle transition surface 505 is arranged between the first contact portion 503 and the second base portion 504. A third contact portion 506 is arranged at the lower part of the upper beam 501. With this structure, in order to ensure efficient construction, since the height of the cast-in-place beam 5 is not less than 1.7 meters, for the safety and convenience of construction, two castings are adopted. The first bamboo plywood 1001 adopts a straight board, and the second bamboo plywood 1002 adopts a bent board. When casting the lower beam 501, the tripod 12 can provide stable lateral support for the second bamboo plywood 1002, and then cooperate with the main rib 1001 and the secondary rib 1002 on the tensioning unit, and the pull rod 1103 can stably lock and fix the template 10 on the opposite side, ensuring the overall sealing effect, so as to withstand the lateral pressure during casting. Due to the existence of the negative angle transition surface 505, the tripod 12 uses the support foundation provided by the bottom sleepers 7 and the panel 302, and the force is stable, thereby ensuring that the casting of the negative angle transition surface 505 meets the design requirements.

[0052] In the preferred embodiment, a limiting unit 13 is provided on one side of the middle support 3 close to the tripod 12, and the limiting unit 13 includes a plurality of supporting plates 1301 arranged in parallel, and the plurality of supporting plates 1301 are connected by a fixing plate 1303, and at least two second through holes 1302 are provided on the supporting plate 1301, and the supporting plate 1301 is sleeved on the deviation correction rod 8, and a supporting plate 1304 is provided on the upper part of the fixing plate 1303, and a first threaded hole 1305 is provided on the supporting plate 1304, and an adjusting unit 14 is provided in the first threaded hole 1305, and the adjusting unit 14 includes a screw The threaded rod 1401 is threadedly connected with the support plate 1304, a limit plate 1407 is provided on one side of the threaded rod 1401, a driving handle 1408 is provided on the limit plate 1407, a retaining ring 1402 and a second threaded hole 1409 are provided on the other side of the threaded rod 1401, the retaining ring 1402 rests on the push plate 1403, a through hole 1404 is provided in the middle of the push plate 1403, a countersunk hole 1405 is provided on one side of the through hole 1404, a locking pin 1406 is arranged in the countersunk hole 1405, and the locking pin 1406 is threadedly connected with the second threaded hole 1409. With this structure, the support plate 1301 is made of I-beam, two support plates 1301 form a group, the outermost spacing of the two support plates 1301 matches the spacing between the two distribution beams 301, so as to further fix the position of the distribution beam 301, and multiple push plates 1403 cooperate to support the bottom of the tripod 12 at different positions. At the same time, the push plate 1403 located in the middle can ensure the synchronization of the push plates 1403 on both sides, so that the overall precision is higher and the effect is better.

[0053] In a preferred embodiment, the tripod 12 includes a first abutting portion 1201 and a second abutting portion 1202. The shape of the first abutting portion 1201 matches the bent portion 1004. A bayonet 1203 is provided between the first abutting portion 1201 and the second abutting portion 1202. The bent portion 1004 is clamped in the bayonet 1203. With this structure, the tripod 12 and the second bamboo plywood 1002 are tightly connected, ensuring that the second bamboo plywood 1002 is accurately positioned, the force is stable, and the overall sealing effect is better.

[0054] In a preferred embodiment, a construction method of an asymmetric cast-in-place cantilever beam support structure is characterized by comprising the following steps:

[0055] S1, by hoisting the pile foundation pipe 6 in the water area, and then completing the pouring of the pile cap 4 on the top of the pile foundation pipe 6;

[0056] S2, pre-install the sleeve 102 on the U-shaped rib 101, complete the welding of the main beam 201 and the distribution beam 301, and open the first through hole 303 on the distribution beam 301;

[0057] S3, completing the connection between the U-shaped reinforcement 101 and the main beam 201 on both sides of the pile cap 4, and using sleepers 7 to block the side walls of the U-shaped reinforcement 101 and the pile cap 4, and then installing the distribution beam 301 in the middle of the main beam 201;

[0058] S4, the panel 302 is used as an extended operating platform, and the first bamboo plywood 1001, the second bamboo plywood 1002, the tripod 12 and the tensioning unit 11 are used to build a pouring space for the lower beam 502, and then pouring;

[0059] S5, using the first bamboo plywood 1001 and the tensioning unit 11 to build a casting space for the upper beam 501 on the upper part of the cast lower beam 502, and then casting;

[0060] S6, after the overall pouring is completed, remove the tensioning unit 11, the formwork 10 and the tripod 12 in sequence, and finally remove the middle support 3, the outer foundation 2 and the hanger 1;

[0061] S7, sort out each unit component and move to the next cantilever beam casting point. With this structure, the construction is safe and efficient, and the overall setting is more reasonable. The pile cap 4 is used as the force foundation to provide bearing installation conditions for the outer foundation 2 and the middle support 3. The main beam 201 cooperates with the U-shaped rib 101 to form a cantilevered shoulder pole structure, which is convenient for the installation of the distribution beam 301 and provides bottom support for the casting of the beam 5. Since the beam 5 is an asymmetric structure and is provided with a negative angle transition surface 505, the cast-in-place beam 5 is set with a two-layer structure for secondary casting, which is more convenient to operate, and each component is easy to install and disassemble, and has a high reusability rate.

[0062] In the preferred scheme, in S3, the locking and fixing units 9 are used on the two outermost distribution beams 301 to complete the locking and fixing of the distribution beams 301 and the correcting rods 8 are used to ensure the accurate position between the distribution beams 301. At the same time, the limiting unit 13 and the adjusting unit 14 are installed. In S4 and S5, the overall sealing needs to be ensured so that the shape of the negative angle transition surface 505 meets the design requirements. During the process, the position of the adjusting unit 14 needs to be adjusted to increase the supporting force on the lower part of the tripod 12 and further limit the tripod 12. With this structure, the overall force is stable and the inconvenience of ordinary fixation by welding can be solved. When the distribution beam 301 is connected to the main beam 201 by spot welding, the welding points will change the shape of the material. After repeated use, convex points will appear in the material, causing damage to the flatness of the main beam 201. After multiple welding, the welding points will change the force strength of the material, and it is not convenient to disassemble the welding points. The locking and fixing unit 9 is used to ensure the fixing effect, and will not cause damage to the materials of the main beam 201 and the distribution beam 301. The limiting unit 13 and the adjustment unit 14 can ensure the accurate position of the distribution beam 301 and provide a more stable supporting force, thereby ensuring the casting effect.

[0063] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A construction device for an asymmetric cast-in-place cantilever beam support structure, characterized in that: The invention comprises two pile caps (4) arranged opposite to each other, outer foundations (2) are respectively arranged on the outer sides of the pile caps (4) along the direction of the center line connecting the two pile caps (4), the two outer foundations (2) are connected by a hanger (1), the hanger (1) is arranged on the upper side of the pile caps (4), a spacer is arranged in the middle of the two pile caps (4), the middle of the two outer foundations (2) is supported by an intermediate support (3), the intermediate support (3) is located at the spacer, the intermediate support (3) penetrates the spacer and extends outwards, and a template (10) and a tripod (12) are detachably arranged on the outer foundations (2) and the intermediate support (3), and the template (10) and the tripod (12) are used to provide a sealed space for pouring a cast-in-place beam (5); The outer foundation (2) comprises two main beams (201), the two main beams (201) are connected by a connecting piece (202), a gap (203) is arranged between the two main beams (201), the hanger (1) comprises a U-shaped rib (101), a sleeve (102) is arranged in the middle of the U-shaped rib (101), the outer side of the sleeve (102) abuts against the upper surface of the pile cap (4), both sides of the U-shaped rib (101) are inserted into the gap (203), the bottom of the U-shaped rib (101) is sleeved with a washer (103), the U-shaped rib (101) is connected to the main beam (201) by a nut (15), a sleeper (7) is detachably arranged on the upper part of the main beam (201), the sleeper (7) comprises a body (701), a chamfer (702) is arranged on a side of the body (701) away from the pile cap (4), and the body (701) is used to provide auxiliary support for the U-shaped rib (101).

2. The construction device of the asymmetric cast-in-place cantilever beam support structure according to claim 1 is characterized in that: The intermediate support (3) comprises a plurality of distribution beams (301) arranged in parallel, at least two first through holes (303) are respectively arranged on both sides of the distribution beam (301), a deviation correction rod (8) is inserted into the first through hole (303), the deviation correction rod (8) is connected to the distribution beam (301) via a nut (15), the upper part of the distribution beam (301) supports a panel (302), the upper surface of the panel (302) overlaps with the upper surface of the pile cap (4), and the outer side of the panel (302) is in contact with the inner side of the pile cap (4).

3. The construction device of the asymmetric cast-in-place cantilever beam support structure according to claim 1 is characterized in that: The middle support (3) is connected to the outer foundation (2) via a locking and fixing unit (9). The locking and fixing unit (9) comprises a round rod (901). The round rod (901) is inserted into a gap (203) on the outer foundation (2). The round rod (901) is sleeved with a cover plate (902), a positioning plate (903), a clamping plate (904), a spring (905) and a nut (15) from top to bottom. The cover plate (902) and the nut (15) are respectively threadedly connected to the round rod (901). The width of the clamping plate (904) matches the gap (203). The cover plate (902) and the clamping plate (904) clamp the middle support (3) from both sides.

4. The construction device of the asymmetric cast-in-place cantilever beam support structure according to claim 3 is characterized by: Slide grooves (908) are respectively arranged on both sides of the upper part of the round rod (901); a first mounting hole (909) and a second mounting hole (910) are respectively arranged in the middle of the positioning plate (903) and the clamping plate (904); sliders (911) are symmetrically arranged in the first mounting hole (909) and the second mounting hole (910); the sliders (911) and the slide grooves (908) are slidably connected; a screw sleeve (906) is arranged on the upper part of the cover plate (902); the screw sleeve (906) and the round rod (901) are threadedly connected; a stopper (907) is arranged on the lower part of the cover plate (902); the stopper (907) is inclined toward one side of the central axis of the cover plate (902); and a top support portion (912) is arranged on the side of the positioning plate (903) away from the middle support (3).

5. The construction device of the asymmetric cast-in-place cantilever beam support structure according to claim 1 is characterized in that: The cast-in-place crossbeam (5) comprises an upper crossbeam (501) and a lower crossbeam (502); the formwork (10) comprises a first bamboo plywood (1001) and a second bamboo plywood (1002); a bending portion (1004) is provided in the middle of the second bamboo plywood (1002); a sealing baffle (1003) is provided at the upper end of the second bamboo plywood (1002); a tripod (12) is arranged on the outer side of the second bamboo plywood (1002); the sealing baffle (1003) and the tripod (12) are clamped together; the three first bamboo plywood (1001) and the second bamboo plywood (1002) and the tripod (12) are connected by a tensioning unit (11) to form a casting cavity of the lower crossbeam (502). The four first bamboo plywood sheets (1001) are connected by a tensioning unit (11) to form a casting space for the upper crossbeam (501). The tensioning unit (11) includes a main crossbeam (1101) and a secondary crossbeam (1102) arranged vertically. The secondary crossbeam (1102) is attached to the outer side of the template (10). The main crossbeam (1101) on the opposite side is connected and fixed by a tension rod (1103). The lower crossbeam (502) includes a first contact portion (503) and a second base portion (504). A negative angle transition surface (505) is provided between the first contact portion (503) and the second base portion (504). The lower part of the upper crossbeam (501) is provided with a third contact portion (506).

6. The construction device of the asymmetric cast-in-place cantilever beam support structure according to claim 1 is characterized by: A limiting unit (13) is provided on one side of the middle support (3) close to the tripod (12), the limiting unit (13) comprising a plurality of supporting plates (1301) arranged in parallel, the plurality of supporting plates (1301) being connected via a fixing plate (1303), the supporting plate (1301) being provided with at least two second through holes (1302), the supporting plate (1301) being sleeved on the deviation correction rod (8), a supporting plate (1304) being provided on the upper part of the fixing plate (1303), the supporting plate (1304) being provided with a first threaded hole (1305), an adjusting unit (14) being provided in the first threaded hole (1305), the adjusting unit (14) comprising a threaded rod (14 01), the threaded rod (1401) and the support plate (1304) are threadedly connected, a limit plate (1407) is provided on one side of the threaded rod (1401), a driving handle (1408) is provided on the limit plate (1407), a retaining ring (1402) and a second threaded hole (1409) are provided on the other side of the threaded rod (1401), the retaining ring (1402) is against the push plate (1403), a through hole (1404) is provided in the middle of the push plate (1403), a countersunk hole (1405) is provided on one side of the through hole (1404), a locking pin (1406) is arranged in the countersunk hole (1405), and the locking pin (1406) and the second threaded hole (1409) are threadedly connected.

7. The construction device of the asymmetric cast-in-place cantilever beam support structure according to claim 5 is characterized by: The tripod (12) comprises a first abutting portion (1201) and a second abutting portion (1202); the shape of the first abutting portion (1201) matches the bending portion (1004); a bayonet (1203) is provided between the first abutting portion (1201) and the second abutting portion (1202); and the bending portion (1004) is bayoneted in the bayonet (1203).

8. A construction method for an asymmetric cast-in-place cantilever beam support structure, characterized in that: The following steps are involved: S1, hoisting the pile foundation pipe (6) in the water area, and then completing the pouring of the pile cap (4) on the top of the pile foundation pipe (6); S2, pre-installing a sleeve (102) on the U-shaped rib (101), completing the welding of the main beam (201) and the distribution beam (301), and opening a first through hole (303) on the distribution beam (301); S3, completing the connection between the U-shaped reinforcement (101) and the main beam (201) on both sides of the pile cap (4), and using sleepers (7) to block the side walls of the U-shaped reinforcement (101) and the pile cap (4), and then installing the distribution beam (301) in the middle of the main beam (201); S4, using the panel (302) as an extended operating platform, using the first bamboo plywood (1001), the second bamboo plywood (1002), the tripod (12) and the tensioning unit (11) to build a casting space for the lower beam (502), and then casting; S5, using the first bamboo plywood (1001) and the tensioning unit (11) to construct a casting space for the upper crossbeam (501) on the upper part of the cast lower crossbeam (502), and then casting; S6, after the overall pouring is completed, the tensioning unit (11), the formwork (10) and the tripod (12) are removed in sequence, and finally the intermediate support (3), the outer foundation (2) and the sling (1) are removed; S7. Arrange each unit component and move to the next cantilever beam casting point.

9. The construction method of an asymmetric cast-in-place cantilever beam support structure according to claim 8, characterized in that: In S3, the locking and fixing units (9) are used on the two outermost distribution beams (301) to lock and fix the distribution beams (301) and the main beam (201), and the correcting rods (8) are used to ensure the accurate position of the distribution beams (301). At the same time, the limiting units (13) and the adjusting units (14) are installed. In S4 and S5, the overall sealing is ensured so that the shape of the negative angle transition surface (505) meets the design requirements. During the process, the position of the adjusting unit (14) needs to be adjusted to increase the support force on the lower part of the tripod (12) and further limit the tripod (12).

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