Portable recyclable concrete beam steel hanging box construction device and construction method in water

Abstract

The device comprises a steel hanging box and a hanging system, the steel hanging box comprises a bottom mould, side moulds and a semicircular end mould, the side moulds comprise first and second side moulds, the bottom of the bottom mould is provided with an upper layer transverse distribution beam, a lower layer longitudinal distribution beam and a first bearing beam, the first side mould is fixedly installed on the upper end face of the bottom mould, the second side mould is fixedly installed on both ends of the bottom mould and forms a step, the semicircular end mould is fixedly connected with the second side mould, the bottom of the semicircular end mould and the second side mould is provided with a waterproof clamping groove bottom mould, the waterproof clamping groove bottom mould is connected with the bottom mould through a connecting plate, and a pile foundation hole is arranged in the middle of the waterproof clamping groove bottom mould. By using the device, the amount of bottom sealing concrete can be reduced, the construction speed and the formwork turnover frequency can be improved, the construction period can be shortened, the construction cost can be reduced, and the pollution of the water environment caused by construction can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of light concrete beam steel hanging box construction device and construction method in water. BACKGROUND

[0002] Traditional bridge engineering water beam construction template needs to pour bottom sealing concrete, and its bottom sealing concrete input is large, and the cost of spreading and selling is high, and the water bottom sealing concrete pouring quantity is large, which increases the lateral pressure of the box, thereby increasing the difficulty of anti-seepage.In addition, due to the limited construction site, the crane is only enough to place one side of the construction, and the flange template is hoisted and assembled and removed, which is difficult, affects the construction speed and the turnover frequency of the template, prolongs the construction period, and increases the construction cost.Therefore, a light, recyclable water concrete beam steel hanging box construction device is developed to improve the construction efficiency. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, provide a light, recyclable water concrete beam steel hanging box construction device and construction method, which can reduce the amount of bottom sealing concrete, improve the construction speed and the turnover frequency of the template, shorten the construction period, reduce the construction cost, and reduce the pollution of the water environment.

[0004] The technical solution adopted by the present application to solve the technical problem is:

[0005] A light concrete beam steel hanging box construction device in water, comprising a steel hanging box and a hanging system, the steel hanging box comprises a bottom mold, a side mold and a semicircular end mold, the side mold comprises a first side mold and a second side mold, the bottom of the bottom mold is provided with an upper layer transverse distribution beam, a lower layer longitudinal distribution beam and a first bearing beam, the first side mold is fixedly installed on the upper end face of the bottom mold, the second side mold is fixedly installed on both ends of the bottom mold and forms a step, the semicircular end mold is fixedly connected with the second side mold, the bottom of the semicircular end mold and the second side mold is provided with a waterproof clamping groove bottom mold, the waterproof clamping groove bottom mold is connected with the bottom mold through a connecting plate, and a pile foundation hole is arranged in the middle of the waterproof clamping groove bottom mold.

[0006] Further, the upper layer transverse distribution beam is a channel steel arranged at a certain interval, the lower layer longitudinal distribution beam is a double-spliced channel steel arranged at a certain interval, and the first bearing beam is an I-beam welded at both ends of the lower layer longitudinal distribution beam, and a series of lifting lugs are arranged on the first bearing beam.

[0007] Further, the adjacent first side molds are fixedly connected through bolts, and rubber waterstop is arranged at the joint; the first side mold is fixedly connected with the bottom mold through bolts, and rubber waterstop is arranged at the joint.

[0008] Further, the second side mold is fixedly connected with the first side mold by bolts, and a rubber waterstop is arranged at the joint.

[0009] Further, the semicircular end mold is fixedly connected with the second side mold by bolts, and a rubber waterstop is arranged at the joint.

[0010] Further, the waterproof clamping groove bottom mold is fixedly connected with the semicircular end mold and the second side mold by bolts, and a rubber waterstop is arranged at the joint.

[0011] Further, the connecting plate is installed at the stepped position, the upper end of the connecting plate is welded with the bottom mold, and the lower end is welded with the waterproof clamping groove bottom mold.

[0012] Further, the outer side of the panel of the first side mold and the second side mold is provided with a transverse stiffening rib welded by a channel steel, and the outer side of the panel of the semicircular end mold is provided with a ring-shaped and vertical stiffening rib welded by a channel steel.

[0013] Further, a channel steel is arranged between the first side mold and the second side mold on the front and rear sides as an internal support.

[0014] Further, the hanging system is composed of an upper cross beam, a second bearing beam and a hand-operated hoist.

[0015] Further, the upper cross beam is an I-shaped steel, which is arranged on the steel platform berle piece as a top cross beam, supports the hand-operated hoist, and transmits the load of the steel hanging box to the second bearing beam.

[0016] Further, the second bearing beam is a steel trestle berle piece on the two sides of the steel platform, which is used as a top bearing longitudinal beam.

[0017] The concrete beam construction method in water implemented by the device has the following specific process:

[0018] The upper steel plate and the I-shaped steel of the steel platform are removed, the steel hanging box is assembled, the hand-operated hoist is installed, the steel hanging box is sunk, the hand-operated hoist is fixed, the bottom sealing concrete is poured, water is pumped out and the internal support is installed, the beam steel bar is processed and installed, the side mold is installed, the concrete is poured, the pier column is constructed, and the steel hanging box is removed.

[0019] Compared with the prior art, the device has the following beneficial effects:

[0020] The concrete beam steel hanging box in water is designed in a modular manner, which is beneficial to on-site construction, can greatly improve the construction efficiency, thereby shortening the construction period and saving the cost, and can be recycled; the semicircular end mold and the bottom mold at the two ends of the box body are designed in a stepped manner, and a height difference is formed in the structure, so that the bottom sealing waterstop only needs to be poured with concrete at the semicircular end mold, the consumption of materials can be reduced, and the development concept of carbon emission reduction is met.

[0021] The water concrete beam construction method of the present application uses waterproof clamping groove bottom mould and waterproof end mould to reduce the amount of bottom sealing concrete; uses water assembling and overall installation of mould to improve construction speed and mould turnover frequency, shorten construction period and reduce construction cost and water environment pollution. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a plan view of the water concrete beam steel hanging box of the present application;

[0023] Figure 2 Fig. 2 is a front view of the water concrete beam steel hanging box shown in Fig. 1; Figure 1

[0024] Figure 3 Fig. 3 is a structural schematic view of the water light and recyclable concrete beam steel hanging box construction device of the present application;

[0025] In the figure: 1, bottom mould, 1-1, upper layer transverse distribution beam, 1-2, lower layer longitudinal distribution beam, 1-3, first bearing beam, 2, side mould, 2-1, first side mould, 2-2, second side mould, 3, semicircular end mould, 4, waterproof clamping groove bottom mould, 5, connecting plate, 6, pile foundation hole, 7, upper cross beam, 8, second bearing beam, 9, hand-operated hoist. DETAILED DESCRIPTION

[0026] The present application is further described below in combination with the drawings and examples.

[0027] Referring to Figures 1-3 A water light and recyclable concrete beam steel hanging box construction device, comprising a steel hanging box and a hanging system, the steel hanging box comprising a bottom mould 1, a side mould 2 and a semicircular end mould 3, the side mould 2 comprising a first side mould 2-1 and a second side mould 2-2, the bottom of the bottom mould 1 being provided with an upper layer transverse distribution beam 1-1, a lower layer longitudinal distribution beam 1-2 and a first bearing beam 1-3, the first side mould 2-1 being fixedly installed on the upper end face of the bottom mould 1 on both sides, the second side mould 2-2 being fixedly installed on both ends of the bottom mould 1 and forming a step, the semicircular end mould 3 being fixedly connected with the second side mould 2-2, the bottom of the semicircular end mould 3 and the second side mould 2-2 being provided with a waterproof clamping groove bottom mould 4, the waterproof clamping groove bottom mould 4 being connected with the bottom mould 1 through a connecting plate 5, and the waterproof clamping groove bottom mould 4 being provided with a pile foundation hole 6 in the middle.

[0028] In this embodiment, the bottom mould 1 is composed of three steel plates combined and welded. The upper layer transverse distribution beam 1-1 is a channel steel arranged at a certain interval. The lower layer longitudinal distribution beam 1-2 is a double-spliced channel steel arranged at a certain interval. The first bearing beam 1-3 is an I-beam welded on both ends of the lower layer longitudinal distribution beam 1-2. A series of lifting lugs are arranged on the first bearing beam 1-3 symmetrically.

[0029] ​In this embodiment, the first side mold 2-1 is six pieces, adjacent first side mold 2-1 is connected by bolt, and 3mm thick rubber waterstop is arranged at the joint to ensure the complete closure of the steel hanging box without water leakage. The first side mold 2-1 is fixedly connected with the bottom mold 1 by bolts, and 3mm thick rubber waterstop is arranged at the joint to ensure the complete closure of the steel hanging box without water leakage.

[0030] In this embodiment, the second side mold 2-2 is four pieces, the second side mold 2-2 is fixedly connected with the first side mold 2-1 by bolts, and 3mm thick rubber waterstop is arranged at the joint to ensure the complete closure of the steel hanging box without water leakage.

[0031] In this embodiment, the semicircular end mold 3 is two pieces, the semicircular end mold 3 is fixedly connected with the second side mold 2-2 by bolts, and 3mm thick rubber waterstop is arranged at the joint to ensure the complete closure of the steel hanging box without water leakage.

[0032] In this embodiment, the waterproof card slot bottom mold 4 is fixedly connected with the semicircular end mold 3 and the second side mold 2-2 by bolts, and 3mm thick rubber waterstop is arranged at the joint to ensure the complete closure of the steel hanging box without water leakage.

[0033] In this embodiment, the connecting plate 5 is installed at the stepped position, the upper end of the connecting plate 5 is welded with the bottom mold 1, and the lower end is welded with the waterproof card slot bottom mold 4. The connecting plate 5 is a steel plate with a height of 0.5m and a thickness of 6mm.

[0034] In this embodiment, the outer side of the panel of the first side mold 2-1 and the second side mold 2-2 adopts a channel steel welded transverse stiffening rib.

[0035] In this embodiment, the outer side of the panel of the semicircular end mold 3 adopts a channel steel welded ring and vertical stiffening rib to ensure the overall rigidity and strength.

[0036] In this embodiment, a channel steel is arranged as an internal support between the first side mold 2-1 and the second side mold 2-2 on the front and rear sides to ensure the stability of the side wall stress.

[0037] In this embodiment, the bottom of the second side mold 2-2 and the semicircular end mold 3 is 50cm lower than the bottom of the tie beam; the waterproof card slot bottom mold 4 at the bottom of the semicircular end mold 3 has a 5cm gap reserved for the steel casing to facilitate adjustment when the pile foundation hole is deviated. A 50cm concrete bottom sealing waterstop is used at the gap between the semicircular end mold 3 and the steel casing, and the bottom sealing concrete uses C30 underwater fine stone concrete.

[0038] In this embodiment, the hanging system is composed of an upper cross beam 7, a second bearing beam 8 and a hand-operated hoist 9.

[0039] In this embodiment, the upper cross beam 7 is an I-beam, which is erected on the steel platform berle piece as the top upper cross beam, supports the hand-operated hoist, and transmits the load of the steel hanging box to the second load-bearing beam.

[0040] In this embodiment, the second load-bearing beam 8 is the steel trestle berle piece on both sides of the steel platform, which is used as the top load-bearing longitudinal beam.

[0041] In this embodiment, 10 5T hand-operated hoists are used to adjust the elevation of the steel hanging box and to assemble and disassemble the formwork.

[0042] The concrete beam construction method in water using the device is as follows:

[0043] The specific process is as follows:

[0044] The specific matters needing attention in assembling the steel hanging box are as follows:

[0045] Firstly, the steel hanging box should be trial-assembled in the processing factory, and after the assembly is determined to be correct, the steel hanging box is disassembled and transported to the construction site in pieces.

[0046] The supporting platform for assembling the bottom mold of the steel hanging box should be measured and leveled; the steel members that are deformed should be corrected before assembly.

[0047] The side mold of the steel hanging box should be trial-assembled and checked first, and then formally welded and jointed; before assembly, rust, scale, burrs, dirt, etc. in a range of 30 mm on each side of the connecting contact surface and weld edge should be completely removed, and the steel metal luster should be exposed; the assembly of the steel hanging box should be carried out symmetrically in zones, and timely measurement and review should be carried out to prevent the accumulation of assembly errors on one side exceeding the specified value.

[0048] Before welding at the construction site, temporary working frames, welding equipment, welding power supply, welding materials, ventilation equipment, and CO2 welding windproof shed frames should be prepared; the welding operation should meet the environmental requirements of wind force < 5, temperature ≥ 5°C, and humidity ≤ 80%; welding should not be carried out in rainy days, otherwise measures should be taken.

[0049] The assembly of the steel hanging box is completed on the temporary platform of the steel trestle according to the steps, the bottom mold is assembled block by block, and then the side mold and the semicircular end mold are hoisted; high-strength bolts are used to connect and fasten between the side mold and the bottom mold, between the side mold and the side mold, and between the side mold and the semicircular end mold; 3mm rubber waterstop is pasted inside the gap to block the leakage, and the whole hanging box is assembled at one time.

[0050] Check and adjust the assembled steel box, and check if there are any missing bolts. If the side mold stiffness is insufficient, reinforce it in time to avoid distortion of the formwork after pumping.

[0051] After each section of the steel box is completed, conduct a kerosene penetration test on the welds. Apply lime water to both sides of the welds with a brush, then apply kerosene to the inside of the cofferdam welds after they dry. Wait 30-60 minutes and check if there are any signs of kerosene penetration on the outside of the cofferdam. If there is no penetration, it is considered qualified.

[0052] If any part of the test fails, it must be re-welded and reported to the supervising engineer. After re-welding, it must be re-tested and only then can it proceed to the next process. Ensure the overall water-tightness of the steel box wall panels.

[0053] The following are the specific considerations for sinking the steel box:

[0054] The inclination of the steel box during sinking is directly related to its production and measurement. Therefore, before sinking the steel box, recheck the water depth and reservoir bottom elevation. Take measures in advance based on sufficient data to address any potential inclination during lifting and during production. Use sufficient weight for the measuring rope and ball, and ensure that the water level does not affect the accuracy of the measurement results.

[0055] The steel box is designed for one-time integral sinking. During sinking, all levels of on-site commanders should be responsible for the special operations by experienced personnel.

[0056] During the integral sinking of the steel box, the safety and reliability of each lifting point must be ensured to ensure uniform distribution of stress on each lifting point. The structural strength and rigidity of the lifting point of the steel box are required to be high. If the strength and rigidity do not meet the requirements, the steel box structure will be damaged. The support beam is in an eccentric compression state. Once the deformation of the support beam at the lifting point is large, it will inevitably cause the steel wire rope to contact the wall panel, affecting the sinking of the steel box.

[0057] The sinking of the steel box is divided into two stages. Full station instruments and levels must be used to check the center line and elevation of the steel box in each stage to ensure that the steel box does not tilt, twist, or deviate during sinking. The sinking height of the steel box must meet the design elevation of the bottom sealing concrete and the tie beam.

[0058] First stage:

[0059] (1) Check the flatness and perpendicularity of the steel box to meet the initial positioning requirements, the quality of the welds, and the presence or absence of leaks.

[0060] (2) Control points and elevation control scales for cofferdam plane positioning.

[0061] (3) Check the safety and reliability of the steel hanging box bottom die and the hand-operated hoist, and whether there is any fault.

[0062] Second stage:

[0063] After the sinking preparation is ready, the command personnel give the command synchronously, and the crane hoists it up slowly and uniformly, so that the force on each lifting point is uniform. At any time, check the force on each component and the hoisting wire to ensure that each working part works in a safe condition, and then determine whether to continue to lower the steel hanging box. Slowly and uniformly lower the steel hanging box to the water surface by the crane, and recheck the elevation and center line of the steel hanging box to ensure that they are consistent with the design, and then continue to lower it.

[0064] At this time, water penetrates into the box through the small gaps, and the water seepage is small and slow. In order to reduce the buoyancy of the steel hanging box, continue to lower the hanging box after the water level in the box is level with the water level in the reservoir area, and pause for a while. Use the total station and the level instrument to check the center line and elevation.

[0065] During the sinking process of the steel hanging box, adjust the elevation of the steel hanging box by the hand-operated hoist to ensure that the steel hanging box sinks to the designed elevation.

[0066] When the sinking elevation meets the design requirements, immediately recheck the position and inclination of the steel hanging box. Lock the hand-operated hoist.

[0067] Notes:

[0068] (1) The steel hanging box should be lifted up and down synchronously and slowly to avoid torsion of the steel hanging box.

[0069] (2) When the bottom of the steel hanging box is 1.0 m away from the designed elevation, accurately position the steel hanging box and then lower it to the designed elevation.

[0070] (3) After the steel hanging box is lowered and positioned, recheck its position and inclination.

[0071] Pour the bottom sealing concrete, and the specific notes are as follows:

[0072] General requirements:

[0073] 1) Lower the steel hanging box to the designed elevation, and pour the bottom sealing concrete by the underwater pouring method. The bottom sealing concrete is poured by the vertical pipe method.

[0074] 2) Pay special attention to the compactness of the end module concrete during the sealing process. The thickness of the bottom sealing concrete is 50 cm, and the bottom sealing concrete is C30 underwater fine stone concrete. Ensure that the bottom sealing concrete reaches the required strength in 40-60 minutes. To ensure the fluidity of the concrete, the workability must meet the construction technology requirements, and the slump is controlled between 18-22 cm. Try to keep the water level difference inside and outside the box consistent before pouring.

[0075] 3) The bottom sealing concrete is C30 underwater fine stone concrete. The center aggregate hopper is used to pour the bottom sealing concrete, and the pouring sequence is: from both ends of the mold at the same time.

[0076] Preparation before sealing the bottom:

[0077] Before sealing the gap between the steel hanging box waterproof clamping groove bottom mold and the steel casing, the professional construction personnel clean the debris on the outer wall of the steel casing to ensure the gripping force between the bottom sealing concrete and the steel casing. And remove the deposits on the steel hanging box waterproof clamping groove bottom mold.

[0078] Sealing of bottom concrete:

[0079] The quality of the bottom sealing concrete is the key to the success of the sealing. The workability, fluidity and stability of the concrete are strictly controlled. During the pouring of the bottom sealing concrete, the concrete mix ratio is adjusted according to the specific situation, so that all indicators of the concrete meet the quality requirements of the bottom sealing concrete.

[0080] The concrete is centrally mixed and supplied by the mixing station. The pouring is carried out by using the guide pipe and hopper method. Butter is applied in the small hopper before sealing, the bottom of the guide pipe is placed 20-30 cm away from the bottom mold, and the pouring is ensured to be continuous and uninterrupted.

[0081] The elevation of underwater concrete should be measured in time during the process, and the concrete volume should be reviewed in time to prevent the bottom sealing concrete from leaking due to cracking or separation of the steel hanging box waterproof clamping groove bottom mold from the side mold, and the blockage between the waterproof clamping groove bottom mold and the steel casing.

[0082] The thickness of the bottom sealing concrete is 0.5m. To ensure that the guide pipe has a certain depth and that the concrete can be poured smoothly, the guide pipe is not lifted randomly. Even if the pipe needs to be lifted, the height of each lift is strictly controlled to ensure that the depth of the guide pipe is not less than 20cm.

[0083] During the sealing process, the water level difference between the inside and outside of the steel hanging box should be basically the same to ensure that the bottom sealing concrete is not damaged by water head pressure.

[0084] When the concrete pouring is about to end, the concrete surface elevation is measured comprehensively. According to the measurement results, the pouring amount of the guide pipe near the measurement point with low concrete surface elevation is increased until the measurement results meet the design requirements. When the elevations of all measurement points meet the control requirements, the bottom sealing concrete pouring is completed.

[0085] Pumping, installation of internal support, specific notes as follows:

[0086] After the strength of the bottom sealing concrete reaches 90%, the water pumping in the steel hanging box can be carried out. The inner support is installed while pumping water. The observation of the side plate of the cofferdam and the hanging rod system should be strengthened when pumping water in the steel hanging box cofferdam. When the side plate leaks, cotton yarn, tung oil, and plaster should be used to plug the leakage.

[0087] The inner support bears the load transmitted by the side mold to prevent deformation of the side mold. Each horizontal support should be welded on the same horizontal plane to ensure the balance of force transmission. The inner support should be welded firmly during the welding process, while reducing the free length of the inner support.

[0088] Pumping water while installing the inner support on one side. Monitor the floating of the hanging box during pumping. During the safe period, water pumps should be prepared while pumping water outward. If there is a large structural change in the steel hanging box, immediately pump water into the cofferdam to restore the balance between the inside and outside.

[0089] Cut off the steel casing, specific notes as follows:

[0090] After pumping water and draining in the steel hanging box, clean the silt and dregs on the surface of the foundation, check whether there is water leakage around the steel hanging box, find out the reasons and handle them in time.

[0091] After checking that there is no water leakage in the steel hanging box, cut and reinforce the pile foundation hole steel casing.

[0092] The pile head is cut off by ring cutting method. Measure and mark the pile top height on the pile head. The cutting line of the ring cutting method is 10 cm above the pile top mark to prevent the pile head from being cut too low. Use a cutting machine to cut around the cutting line, and the depth is to the reinforcement. Use a wind pick to completely strip the reinforcement and concrete protective layer above the cutting line; bend the reinforcement slightly outward to facilitate subsequent construction.

[0093] Construction of the trestle guardrail, specific notes as follows:

[0094] Safety railings are set up in the range of the steel trestle for water tie beam construction. The railing is 1.2 m high, the vertical rod is made of 10# channel steel with a spacing of 2.0 m, and is welded on the steel plate of the steel trestle; the horizontal rod is made of Φ48×3.5 mm steel pipe with a spacing of 60 cm. The railing uses red and white reflective paper every 200 mm. The two sides of the railing are covered with safety net to prevent people from falling.

[0095] Reinforcement processing, installation, and side mold installation of tie beam, specific notes as follows:

[0096] The main reinforcement welding adopts double lap welding, the weld length is greater than 5d, and the joint is 50% staggered when cutting, not less than 35d and not less than 50cm; the distance between the end of the binding joint of the reinforcement and the bending place of the reinforcement is not less than 10d, and the joint is not located at the maximum bending moment of the component. When the reinforcement is bound, except for special design provisions, the stirrup is perpendicular to the main reinforcement, and the center and both ends of the reinforcement lap joint are fastened with iron wire.

[0097] Concrete pouring, specific matters needing attention are as follows:

[0098] The concrete required by the bridge is supplied by a centralized mixing station and transported to the construction site by a concrete tank truck. When pouring concrete, the vibration rod is inserted quickly and pulled out slowly to prevent under-vibration and missed vibration, and check whether the formwork has gaps and leakage.

[0099] Pouring concrete with a concrete tank truck equipped with a chute, strictly control the selection of raw materials of concrete during construction, and strictly control the slump of concrete during pouring.

[0100] The concrete is vibrated and compacted with a vibration rod, the concrete stops sinking and no more bubbles come out, the surface is flat and smooth.

[0101] When pouring concrete, a special person is arranged to detect the formwork, check the deformation and protection layer, and take timely measures if problems are found.

[0102] Pier construction, specific matters needing attention are as follows:

[0103] After the beam concrete strength reaches a certain strength, install the pier formwork and pour the pier concrete.

[0104] Steel hanging box demolition, specific matters needing attention are as follows:

[0105] Before the steel hanging box is demolished, a communication hole should be opened on the side formwork to make the internal and external water head difference zero, and the demolition should be carried out in the order of first up and then down, and first support and then side plate.

[0106] After the beam pier formwork support is demolished, the beam concrete strength meets the design requirements, the bottom form steel wire rope is fixed, the hand-operated hoist is loosened, and the end form is removed; then the middle inner support is removed, and then the side form is removed; finally, the bottom form and the bearing beam are removed.

Claims

1. A portable and recyclable concrete beam steel hanging box construction device in water, characterized in that: The utility model provides a steel hanging box and hanging system, the steel hanging box includes bottom mould, side mould and semicircle end mould, the side mould includes first side mould and second side mould, the bottom of bottom mould is equipped with upper layer transverse distribution beam, lower layer longitudinal distribution beam and first bearing beam, first side mould is fixedly installed on the upper end face of bottom mould before and after, second side mould is fixedly installed on both ends of bottom mould and forms the step, semicircle end mould is fixedly connected with second side mould, the bottom of semicircle end mould and second side mould is equipped with waterproof clamping groove bottom mould, waterproof clamping groove bottom mould is connected with bottom mould through connecting plate, and stake hole is arranged in the middle of waterproof clamping groove bottom mould;The connecting plate is installed in the step position, and the upper end of the connecting plate is welded with the bottom mould, and the lower end is welded with the waterproof clamping groove bottom mould;The hanging system is composed of upper crossbeam, second bearing beam and chain hoist, the upper crossbeam is I-shaped steel, is set up on the steel platform bailey as the top upper crossbeam, supports chain hoist, and transmits the load of steel hanging box to the second bearing beam, and the second bearing beam is the steel trestle bailey on both sides of steel platform and is used as the top bearing longitudinal beam.

2. The lightweight recyclable concrete tied-beam steel box cofferdam construction device in water according to claim 1, characterized in that: The upper layer transverse distribution beam is channel steel and is arranged at a certain interval;The lower layer longitudinal distribution beam is double-spliced channel steel and is arranged at a certain interval;The first bearing beam is I-shaped steel and is welded at both ends of the lower layer longitudinal distribution beam, and a series of lifting lugs are arranged on the first bearing beam and are symmetrically arranged.

3. The waterborne portable recyclable concrete tied-beam steel boxed coffer construction device according to claim 1 or 2, characterized in that: The first side mould is fixedly connected with the bottom mould through bolts, and rubber waterstop is arranged at the joint;The second side mould is fixedly connected with the first side mould through bolts, and rubber waterstop is arranged at the joint;The semicircle end mould is fixedly connected with the second side mould through bolts, and rubber waterstop is arranged at the joint;The waterproof clamping groove bottom mould is fixedly connected with the semicircle end mould and the second side mould through bolts, and rubber waterstop is arranged at the joint.

4. The waterborne portable recyclable concrete tied-beam steel boxed coffer construction device according to claim 1 or 2, characterized in that: The outer side of the panel of the first side mould and the second side mould is provided with a transverse stiffening rib made of channel steel;The outer side of the panel of the semicircle end mould is provided with a ring-shaped and vertical stiffening rib made of channel steel.

5. The waterborne portable recyclable concrete tied-beam steel boxed coffer construction device according to claim 1 or 2, characterized in that: Channel steel is used as an inner support between the first side mould and the second side mould on the front and back sides.

6. A method of constructing a concrete tied beam in water using the apparatus of any one of claims 1 to 5, characterised in that, The specific process is as follows: Remove the upper steel plate and I-shaped steel on the steel platform, assemble the steel hanging box, install the chain hoist, sink the steel hanging box, fix the chain hoist, pour the bottom sealing concrete, pump water and install the inner support, cut off the steel casing and chisel the pile head, process and install the beam reinforcement and the side mould, pour the concrete, construct the pier column, and remove the steel hanging box.

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