Connecting form for turnover use of double-wall steel hanging box and construction method

Abstract

The invention discloses a double-wall steel hanging box turnover use connecting form and construction method.The connecting form comprises a top plate, a pair of rubber pads, a concrete layer and a plurality of hanging rods, the top plate covers the top face of a bottom section wall body, and the pair of rubber pads are arranged on the top plate and located on the inner side and the outer side of a steel hanging box wall body correspondingly; the top section wall body is placed on the pair of rubber pads, a plurality of steel corbels are fixedly arranged on the inner side wall face and the outer side wall face of the bottom section wall body in the circumferential direction at intervals and tightly attached to the top plate, and a plurality of steel corbels are fixedly arranged on the inner side wall face and the outer side wall face of the top section wall body at the top in the circumferential direction at intervals and tightly attached to the top plate. The rubber pads correspond to the steel corbels on the bottom section wall body in a one-to-one mode, the steel corbels in one-to-one correspondence are connected into a whole through hanging rods, so that the top section wall body is connected with the bottom section wall body, and the space among the top plate, the pair of rubber pads and the bottom of the top section wall body is filled with a concrete layer. The device has the advantages of convenience, safety and accuracy in turnover use and mounting and dismounting and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation construction, and more specifically, to a double-wall steel hanging box circulatory connection form and construction method. Background Art

[0002] Steel cofferdams serve as water retaining and formwork structures during the construction of the pedestal, and are usually composed of wall bodies, bottom plates, internal supports and other structures. In deepwater environments, steel cofferdams usually adopt a double-wall structure. The walls of double-walled steel cofferdams are usually connected by welding, which makes underwater cutting and dismantling difficult, and makes them difficult to use in rotation. If the walls of double-walled steel cofferdams are connected by bolts, the number of bolts is huge, and the workload of underwater dismantling is large. It is common for bolts to deform after being stressed, making dismantling difficult, and the second installation accuracy cannot meet the requirements; if the walls of double-walled steel cofferdams are connected by fine-rolled threaded steel bars, the spacing between the fine-rolled threaded steel bars is large, and the risk of leakage is high, making them difficult to handle. In view of the difficulties in installation and dismantling and the high risk of leakage in the turnover of double-walled steel hanging boxes, this application proposes a new connection form and construction method that can be used in rotation. Summary of the invention

[0003] One purpose of the present invention is to provide a double-walled steel hanging box connection form and construction method for turnover use, which has the advantages of convenient, safe and accurate turnover and installation and dismantling.

[0004] In order to solve the above technical problems, the present invention provides a double-walled steel hanging box turnover connection form, which divides the double-walled steel hanging box wall into two parts, namely the top section wall and the bottom section wall. The double-walled steel hanging box turnover connection form includes a top plate arranged on the top surface of the bottom section wall, a pair of rubber pads arranged on the inside and outside of the top plate, a concrete layer connecting the top section wall and the bottom section wall as one, and several hanging rods. The top plate covers the top surface of the bottom section wall and extends outward on both sides. The shape of the pair of rubber pads is the same as that of the steel hanging box wall. A pair of rubber pads are arranged on the top plate. The top section wall body is placed on a pair of rubber pads, and a plurality of steel corbels are fixedly arranged on the inner and outer wall surfaces of the bottom section wall body along the circumferential direction, which are arranged close to the top plate, and a plurality of steel corbels are also fixedly arranged on the inner and outer wall surfaces of the top section wall body along the circumferential direction, which correspond one to one with the plurality of steel corbels on the bottom section wall body, and the corresponding steel corbels are connected as a whole through the suspension rod, thereby connecting the top section wall body and the bottom section wall body, and the space between the top plate, the pair of rubber pads and the bottom of the top section wall body is filled with a concrete layer.

[0005] Preferably, a plurality of second baffles are spaced apart on the top plate and are inverted on the top plate to form an inverted V-shaped structure, and both ends of the second baffles are closed to prevent them from being filled with a concrete layer.

[0006] Preferably, the top plate and the plurality of second baffles are coated with a release agent layer to reduce adhesion between the concrete layer and the top plate of the bottom section wall.

[0007] Preferably, the plurality of second baffles are arranged at uniform intervals along the same circumferential direction of the top plate or are arranged at uniform staggered intervals along the inner and outer circumferential directions of the top plate.

[0008] Preferably, a plurality of first stoppers are evenly spaced and fixedly arranged on the top plate of the bottom section wall along the circumferential direction, and extend to be closely attached to the top section wall for bearing horizontal loads.

[0009] Preferably, a steel mesh is provided on the horizontal cross brace at the bottom end of the top section wall body, and is located in the concrete layer.

[0010] Preferably, a connecting pipe is provided at the bottom of the top section wall body, and its height is higher than the concrete layer. A connecting hole is provided on the top plate of the bottom section wall body. The connecting pipe passes through the concrete layer and extends to the connecting hole, so as to connect the top section wall body with the inner cavity of the bottom section wall body.

[0011] The present invention also provides a construction method for the turnover use of a double-walled steel hanging box, comprising the following steps: Step 1: Process the top wall section and the bottom wall section separately in the processing plant and then transport them to the construction site; Step 2: Install a top plate on the top surface of the bottom section wall, install a rubber pad on the top plate, and weld a plurality of second stoppers; in addition, weld and fix a plurality of steel brackets on the inner and outer wall surfaces of the bottom section wall; Step 3: Weld a steel mesh at the bottom of the top wall; and weld a plurality of steel brackets at the corresponding positions on the top of the top wall; Step 4: Hoist the top wall section to the bottom wall section, install the suspension rod between the corresponding steel brackets and apply pre-tightening force; Step 5: Before pouring concrete, first apply an isolation agent on the top plate of the bottom wall and the surface of the plurality of second stoppers; then pour concrete in the space between the top plate, a pair of rubber pads and the bottom of the top wall, with the filling height being higher than the steel mesh; Step 6: Weld the first stopper close to the inner side of the top section wall, which is only welded to the top plate of the bottom section wall; Step 7: hoisting and lowering of steel cofferdam, pouring of bottom concrete, pumping, foundation construction, and pier construction; Step 8: Remove the suspension rod, lift the top wall section, and lift the top wall section to the next bottom wall section for reuse; Arrangement nine: the top wall section and the bottom wall section are connected by welding; Arrangement 10: Lift and lower, and carry out steel cofferdam construction according to normal procedures.

[0012] The present invention has at least the following beneficial effects: 1. The present application divides the wall of the double-walled steel hanging box into two parts, and connects the two parts more conveniently through the connection form of the present application, and the subsequent dismantling is also convenient; a lot of underwater operations are not required during the dismantling and installation process, the installation workload is small, and the efficiency is high.

[0013] 2. The connection form and construction method of the present application will not destroy the structural form of the double-walled steel box cofferdam itself, thereby making the turnover accuracy of the double-walled steel box cofferdam higher and being able to meet the turnover requirements.

[0014] 3. The connection form and construction method of the present application ensure the stability and firmness of the connection form through the provision of rubber pads and concrete layers, without the risk of water leakage, and with higher safety.

[0015] 4. The connection form and construction method of the present application facilitate subsequent dismantling and ensure the safety of the dismantling process through the setting of steel mesh and the coating of release agent; in addition, through the setting of multiple first blocks and multiple second blocks, the connection form of the present application can withstand horizontal loads and resist horizontal forces. Combined with the setting of multiple hangers, it can withstand vertical loads and ensure the safety and stability of the overall connection form.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the vertical layout of the double-walled steel cofferdam splicing form of the embodiment of the present application; Figure 2 This is an enlarged view of the double-wall steel cofferdam connection form of the embodiment of the present application; Figure 3 It is a schematic diagram of the plan layout of the double-wall steel cofferdam splicing form according to an embodiment of the present application.

[0018] Description of reference numerals: 1. Top section wall, 2. Bottom section wall, 3. Hanger, 4. Steel corbel, 5. First stopper, 6. Second stopper, 7. Rubber pad, 8. Top plate, 9. Release agent layer, 10. Steel mesh, 11. Concrete layer, 12. Connecting pipe, 13. Connecting hole. DETAILED DESCRIPTION

[0019] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

[0020] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] like Figures 1 to 3 As shown, the technical solution of the first object of the present invention is: to provide a double-walled steel hanging box turnover connection form, the double-walled steel hanging box wall is divided into two parts, the top section wall 1 and the bottom section wall 2, the top section wall is used for turnover, the double-walled steel hanging box turnover connection form includes a top plate 8 arranged on the top surface of the bottom section wall, a pair of rubber pads 7 arranged on the inside and outside of the top plate, a concrete layer 11 connecting the top section wall 1 and the bottom section wall 2 as a whole, and several hanging rods 3, the top plate covers the top surface of the bottom section wall and extends outward on both sides, serving as a bottom mold for pouring the sandwich wall concrete at the connection between the top section wall and the bottom section wall, the shape of the pair of rubber pads They are all the same shape as the steel hanging box wall, a pair of rubber pads are arranged on the top plate and are respectively located on the inner and outer sides of the steel hanging box wall, the top section wall is placed on the pair of rubber pads, and the bottom section wall is provided with a plurality of steel corbels 4 fixedly arranged on its inner and outer side wall surfaces along the circumferential direction, which are arranged close to the top plate, and the top section wall is located on the inner and outer side wall surfaces of the top section wall and also provided with a plurality of steel corbels fixedly arranged along the circumferential direction, which correspond one to one with the plurality of steel corbels on the bottom section wall, and the corresponding steel corbels are connected as a whole through the suspension rod, thereby connecting the top section wall and the bottom section wall, and the space between the top plate, the pair of rubber pads and the bottom of the top section wall is filled with a concrete layer.

[0022] The connection form is mainly composed of a top plate 8, a hanger rod 3, a first stopper 5, a second stopper 6, a rubber pad 7, a release agent layer 9, a steel mesh 10, a concrete layer 11, a connecting pipe 12, and a connecting hole 13.

[0023] The hanger rod is made of fine-rolled threaded steel bars, which are intermittently arranged inside and outside the steel hanging box wall. It is used to connect the top section wall and the bottom section wall, and mainly bears vertical loads.

[0024] A plurality of first stops are evenly spaced and fixedly arranged along the circumferential direction on the top plate of the bottom section wall body, which extend to be close to the top section wall body and are used to bear horizontal loads. The first stop is made of steel section, welded to the top of the bottom section wall body of the steel hanging box, close to the top section wall body, not welded to the top section wall body, and mainly bears horizontal loads. The first stop can also be welded and arranged on the inner and outer sides of the top of the bottom section wall body, close to the top section wall body plate. The first stop can be welded into a T-shaped structure using steel plates, which is mainly used to transmit shear force. As the main component for resisting horizontal force, the first stop is only welded to the top plate of the bottom section wall body, not to the top section wall body.

[0025] A plurality of second baffles are arranged at intervals on the top plate, which are buckled on the top plate to form an inverted V-shaped structure, and both ends of the second baffles are closed to prevent being filled with a concrete layer. The second baffles are made of angle steel, buckled on the top plate of the bottom wall, and firmly welded to the top plate of the bottom wall. Both ends are closed. After pouring the sandwich wall concrete, the second baffle interacts with the sandwich wall concrete to resist horizontal forces.

[0026] The rubber pad is made of expandable water-stopping rubber and is used at the contact point between the top section wall and the bottom section wall to play a water-stopping role.

[0027] The top plate and the plurality of second baffles are coated with a release agent layer to reduce the adhesion between the concrete layer and the top plate of the bottom wall. The release agent is located on the top plate of the bottom wall and the second baffle to reduce the adhesion between the concrete and the top plate of the bottom wall, and facilitate the separation of the top wall from the bottom wall. The plurality of second baffles are evenly spaced along the same annular direction of the top plate (as shown in the figure) or evenly staggered along the inner and outer annular directions of the top plate.

[0028] A steel mesh is arranged on the bottom horizontal cross brace of the top wall section, which is located in the concrete layer. The steel mesh is located on the bottom horizontal cross brace of the top wall section, in the concrete, and is used to improve the overall shape of the concrete, and prevent the concrete from being partially damaged and falling when the top wall section is hoisted, so as to cause the risk of falling objects from high altitude.

[0029] The concrete is located at the top of the bottom wall and the bottom of the top wall. After the top wall and the bottom wall are spliced, the hanger is installed in place and the pre-tightening force is applied, and the isolation agent is applied, pouring is performed to form an appropriate amount of sandwich wall concrete. Its function is to increase the bottom rigidity of the top wall at the segmented connection, reduce the local deformation of the steel hanging box, and facilitate the second assembly and positioning. On the other hand, it can play a sealing and water-stopping role to prevent water outside the cofferdam from entering the sandwich wall of the steel hanging box, and water in the sandwich wall from entering the steel hanging box. The purpose of pouring concrete connection is to stop water, resist shear, and increase the local rigidity of the structure.

[0030] A connecting pipe is provided at the bottom of the top wall body, and its height is higher than the concrete layer. A connecting hole is provided on the top plate of the bottom wall body. The connecting pipe passes through the concrete layer and extends to the connecting hole, and is used to connect the top wall body with the inner cavity of the bottom wall body. The connecting pipe is temporarily fixed to the bottom structure of the top wall body, is not welded to the bottom wall body, and can rotate with the top wall body. The connecting pipe is located at the bottom of the top wall body and is installed before concrete pouring. The height is greater than the thickness of the concrete and is placed above the connecting hole of the bottom wall body, and is used to connect the top wall body with the inner cavity of the bottom wall body.

[0031] The second object of the present invention is to provide a construction method for the turnover use of a double-wall steel cofferdam, comprising the following steps: Step 1: Process the top wall section and the bottom wall section separately in the processing plant and then transport them to the construction site; Step 2: Install a top plate on the top surface of the bottom section wall, install a rubber pad on the top plate, and weld a plurality of second stoppers; in addition, weld and fix a plurality of steel brackets on the inner and outer wall surfaces of the bottom section wall; Step 3: Weld a steel mesh at the bottom of the top wall; and weld a plurality of steel brackets at the corresponding positions on the top of the top wall; Step 4: Hoist the top section wall to the bottom section wall, install the hanger between the corresponding steel brackets and apply pre-tightening force; the main function of applying pre-tightening force is to make the section connection always have pressure in each construction stage, so as to ensure that the section connection is always in a tight state, so as to achieve the purpose of watertightness; Step 5: Before pouring concrete, first apply an isolation agent on the top plate of the bottom wall and the surface of the plurality of second stoppers; then pour concrete in the space between the top plate, a pair of rubber pads and the bottom of the top wall, with the filling height being higher than the steel mesh; Step 6: Weld the first stopper close to the inner side of the top section wall, which is only welded to the top plate of the bottom section wall; Step 7: hoisting and lowering of steel cofferdam, pouring of bottom concrete, pumping, foundation construction, and pier construction; Step 8: After the construction of the foundation and pier is completed, when the steel hanging box is removed, the hanging rod is removed, the top wall section is lifted, and the top wall section is lifted to the next bottom wall section for reuse; Arrangement nine: the top wall section and the bottom wall section are connected by welding; Arrangement 10: Lift and lower, and carry out steel cofferdam construction according to normal procedures.

[0032] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation mode, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, other modifications can be easily implemented, so without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. The double-walled steel hanging box is used in a turnover connection form, characterized in that: The double-walled steel hanging box wall is divided into two parts, namely the top section wall and the bottom section wall. The double-walled steel hanging box is used in a turnover connection form including a top plate arranged on the top surface of the bottom section wall, a pair of rubber pads arranged on the inside and outside of the top plate, a concrete layer connecting the top section wall and the bottom section wall as one, and several hanging rods. The top plate covers the top surface of the bottom section wall and extends outward on both sides. The shape of the pair of rubber pads is the same as that of the steel hanging box wall. A pair of rubber pads are arranged on the top plate and are respectively located on the inside and outside of the steel hanging box wall The top section wall body is placed on a pair of rubber pads, and the bottom section wall body is provided with a plurality of steel corbels fixedly arranged at intervals along the circumferential direction on its inner and outer side wall surfaces, which are arranged close to the top plate, and the top section wall body is located at the top and is also provided with a plurality of steel corbels fixedly arranged at intervals along the circumferential direction on its inner and outer side wall surfaces, which correspond one to one with the plurality of steel corbels on the bottom section wall body, and the corresponding steel corbels are connected as a whole through hangers, thereby connecting the top section wall body and the bottom section wall body, and the space between the top plate, the pair of rubber pads and the bottom of the top section wall body is filled with a concrete layer.

2. The double-walled steel hanging box turnover connection form as described in claim 1 is characterized in that: A plurality of second baffles are arranged on the top plate at intervals and are inverted on the top plate to form an inverted V-shaped structure. Both ends of the second baffles are closed to prevent them from being filled with a concrete layer.

3. The double-walled steel hanging box turnover connection form as described in claim 2 is characterized in that: The top plate and the plurality of second baffles are coated with a release agent layer to reduce the adhesion between the concrete layer and the top plate of the bottom section wall.

4. The double-walled steel hanging box turnover connection form as described in claim 2 is characterized in that: The plurality of second baffles are evenly spaced along the same annular direction of the top plate or evenly staggered along the inner and outer annular directions of the top plate.

5. The double-walled steel hanging box turnover connection form as described in claim 1 is characterized in that: A plurality of first stoppers are evenly spaced and fixedly arranged on the top plate of the bottom section wall along the circumferential direction, and extend to be close to the top section wall for bearing horizontal loads.

6. The double-walled steel hanging box turnover connection form as claimed in claim 1 is characterized in that: A steel mesh is arranged on the horizontal cross brace at the bottom end of the top section wall body and is located in the concrete layer.

7. The double-walled steel hanging box turnover connection form as claimed in claim 1 is characterized in that: A connecting pipe is arranged at the bottom of the top wall section, and its height is higher than the concrete layer. A connecting hole is arranged on the top plate of the bottom wall section. The connecting pipe passes through the concrete layer and extends to the connecting hole, so as to connect the top wall section with the inner cavity of the bottom wall section.

8. The construction method for the turnover use of double-walled steel hanging boxes according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: Process the top wall section and the bottom wall section separately in the processing plant and then transport them to the construction site; Step 2: Install a top plate on the top surface of the bottom section wall, install a rubber pad on the top plate, and weld a plurality of second stoppers; in addition, weld and fix a plurality of steel brackets on the inner and outer wall surfaces of the bottom section wall; Step 3: Weld a steel mesh at the bottom of the top wall; and weld a plurality of steel brackets at the corresponding positions on the top of the top wall; Step 4: Hoist the top wall section to the bottom wall section, install the suspension rod between the corresponding steel brackets and apply pre-tightening force; Step 5: Before pouring concrete, first apply an isolation agent on the top plate of the bottom wall and the surface of the plurality of second stoppers; then pour concrete in the space between the top plate, a pair of rubber pads and the bottom of the top wall, with the filling height being higher than the steel mesh; Step 6: Weld the first stopper close to the inner side of the top section wall, which is only welded to the top plate of the bottom section wall; Step 7: hoisting and lowering of steel cofferdam, pouring of bottom concrete, pumping, foundation construction, and pier construction; Step 8: Remove the suspension rod, lift the top wall section, and lift the top wall section to the next bottom wall section for reuse; Arrangement nine: the top wall section and the bottom wall section are connected by welding; Arrangement 10: Lift and lower, and carry out steel cofferdam construction according to normal procedures.

Images