Positioning construction method suitable for double-wall steel hanging box in high-tidal-range deepwater environment

Abstract

The invention discloses a positioning construction method suitable for a double-wall steel hanging box in a high-tidal-range deepwater environment, which comprises the following steps: step 1, the structure of the double-wall steel hanging box is designed, the double-wall steel hanging box comprises a wall body bottom section, a wall body middle section and a wall body top section which are arranged in sequence, the wall body middle section is a hollow closed cabin, and water does not enter the cabin all the time; the section top of the wall body middle section is positioned below a low tide level; a communicating hole is formed in the position, located on the lower portion of the inner wall plate, of the wall body top section. Secondly, the double-wall steel hanging box is integrally hoisted and lowered, so that the wall body bottom section is filled with water; the double-wall steel hanging box continues to be put down, so that the middle section of the wall body is submerged into water; continuously lowering the double-wall steel hanging box, so that the top section of the wall body is gradually submerged into water; and step 3, lowering in place. Through the reasonable design of the double-wall steel hanging box structure and the design of the positioning construction method, constant buoyancy can be provided for vertical positioning in the high-tidal-range deepwater environment, and meanwhile the advantages of being high in construction safety, flexible to operate and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation construction, and more specifically, to a positioning construction method for a double-walled steel hanging box suitable for use in a high tide and deep water environment. Background Art

[0002] The double-walled steel hanging box is used as a water retaining and formwork structure during the construction of the foundation. After the steel hanging box is lowered to a fixed elevation, it needs to rely on its own buoyancy for vertical positioning, or set hanging legs and hanging beams to place the steel hanging box on the steel casing. In a high tidal range deep water environment, the tidal range reaches eight or nine meters, and the steel hanging box cannot rely on the constant internal and external head difference to provide buoyancy for vertical limitation; in addition, for large-sized double-walled steel hanging boxes, their weight is large, and they rely on hanging legs and hanging beams for vertical limitation. The hanging legs and hanging beams have high design bearing capacity requirements, large usage, and high risks. Therefore, for large-sized double-walled steel hanging boxes, in a high tidal range deep water environment, how to design the structure and positioning construction method of the double-walled steel hanging box so that it can be better vertically positioned in a high tidal range deep water environment is the core technical problem to be solved by this application. Summary of the invention

[0003] One object of the present invention is to provide a positioning construction method for a double-walled steel hanging box suitable for a high tide difference deep water environment. Through the reasonable design of the double-walled steel hanging box structure and the design of the positioning construction method, it can provide constant buoyancy for vertical positioning in a high tide difference deep water environment, and at the same time has the advantages of high construction safety and flexible operation.

[0004] In order to solve the above technical problems, the present invention provides a positioning construction method for a double-walled steel hanging box suitable for a high tide difference deep water environment, comprising the following steps: Step 1: Design the structure of the double-walled steel hanging box. The double-walled steel hanging box includes a wall bottom section, a wall middle section and a wall top section which are sequentially arranged as one from bottom to top. The wall middle section is a hollow closed cabin and water never enters the cabin. The top of the wall middle section is located below the low tide level. The buoyancy provided by the wall middle section is less than the dead weight of the double-walled steel hanging box. The wall middle section is firmly welded to the wall bottom section and the wall top section so that the hollow structure of the sandwich wall of the wall bottom section and the wall top section is watertight. The wall top section is located at the lower part of the inner wall plate and is provided with a connecting hole connected to the hollow structure of the sandwich wall, which is used to balance the water level inside and outside the sandwich wall of the wall top section. A limiting device is also provided on the top of the wall top section. Step 2: hoist and lower the double-walled steel hanging box as a whole, so that the bottom section of the wall body is filled with water; continue to lower the double-walled steel hanging box, so that the middle section of the wall body is submerged in water, and the middle section of the wall body never enters water, providing constant buoyancy for the steel hanging box; continue to lower the double-walled steel hanging box, so that the top section of the wall body is gradually submerged in water, and water enters the top section of the wall body through the connecting hole at the bottom of the inner wall plate of the top section of the wall body, maintaining the water level in the sandwich wall of the top section of the wall body and the water level outside the steel hanging box in balance; as the tide rises and falls, the connecting hole at the bottom of the inner wall plate of the top section of the wall body maintains the water level in the sandwich wall of the top section of the wall body and the water level outside the steel hanging box to always remain consistent, and the top section of the wall body does not provide buoyancy; Step 3: After lowering into place, place the double-walled steel hanging box on the steel casing through the limiting device.

[0005] Preferably, in the step one, an internal communicating vessel penetrating into the hollow structure of the sandwich wall is provided at a position of the bottom section of the wall body located at the lower part of the inner wall plate, and is used for automatically filling with water and sinking when the steel hanging box is lowered; a breather valve is provided at a position of the bottom section of the wall body located at the upper part of the inner wall plate, and is used for removing air from the bottom section of the wall body; in the step two, when the double-walled steel hanging box is lifted and lowered as a whole, the internal communicating vessel and the breather valve are both in an open state, and after the steel hanging box is put into water, before the steel hanging box floats by itself, the internal communicating vessel is submerged in water, and water is automatically filled into the bottom section of the wall body, and the gas in the bottom section of the wall body is discharged through the breather valve until the bottom section of the wall body is filled with water.

[0006] Preferably, an external communicating vessel is provided on the middle section of the wall body, which passes through the inner wall plate and the outer wall plate on both sides of the middle section of the wall body. The external communicating vessel is located below the low tide level and is used to balance the water head difference inside and outside the steel hanging box; in the step two, when the double-walled steel hanging box is lifted and lowered as a whole, the external communicating vessel is in an open state.

[0007] Preferably, the inner communicating vessel and the outer communicating vessel both include a connecting pipe and a valve disposed on the connecting pipe.

[0008] Preferably, a connecting valve is provided on the bottom plate of the middle section of the wall body, which is used to connect the bottom section of the wall body with the middle section of the wall body, and the connecting valve includes a through pipe with a flange provided on it, and the through pipe is closed by the flange; in the step two, when the steel hanging box is lowered, the connecting valve is in a closed state; the step three also includes a step four: pouring bottom concrete at the bottom of the steel hanging box, and after the bottom concrete reaches a set strength, opening the connecting valve at a set water level, closing the inner connecting vessel, the outer connecting vessel and the air valve, and pumping out the water in the sandwich wall of the steel hanging box in stages until the water in the steel hanging box is drained and the water level in the sandwich wall is controlled at the design elevation.

[0009] Preferably, the connecting valve is opened by: an operator cutting the steel pipe of the connecting valve through the air-permeable valve to open the connecting valve; or opening the connecting valve by removing the flange.

[0010] Preferably, a connecting pipe is provided on the top plate of the middle section of the wall body, the lower end of which is connected to the hollow structure of the sandwich wall of the middle section of the wall body, and the upper end of the connecting pipe is connected to the outside of the top section of the wall body. The connecting pipe is used to connect the sandwich wall of the middle section of the wall body with the external atmosphere, and is also used to discharge water in the sandwich wall of the steel hanging box.

[0011] Preferably, a limiting device is also provided above the top section of the wall body, which includes a hanging leg and a hanging beam connected as an integral whole, the hanging leg is located on the top of the steel hanging box, and the hanging beam is provided on the steel casing for vertically limiting the steel hanging box, and the bearing capacity of the limiting device is the difference between the deadweight of the steel hanging box and the buoyancy provided by the middle section of the wall body.

[0012] The present invention has at least the following beneficial effects: 1. During the construction process, the present invention first divides the wall of the double-walled steel hanging box into three sections: upper, middle and lower. The middle section of the wall is a hollow closed cabin structure that is not filled with water, which provides constant buoyancy, so that the weight and buoyancy of the double-walled steel hanging box in the water are constant and will not change with the height and depth of the tide. It can be used for the vertical positioning construction of the double-walled steel hanging box in a deep-water environment with a high tidal range.

[0013] 2. The double-walled steel hanging box of the present invention can provide constant buoyancy during the construction process, and can also reduce the weight of the steel hanging box and the design bearing capacity of the hanging legs, thereby improving the safety and flexibility of the construction.

[0014] 3. The positioning construction method of the present invention achieves the vertical positioning construction of the double-walled steel hanging box in a high tidal range deep water environment through a simple, convenient and flexible structure and construction method through the reasonable design of the double-walled steel hanging box structure and the coordinated design of multiple valves and connecting vessels.

[0015] 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

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Description of reference numerals: 1. Connecting hole, 2. Internal connecting vessel, 3. Breathing valve, 4. Connecting valve, 5. External connecting vessel, 6. Connecting pipe, 7. Bottom plate. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] The large-size steel hanging box of the present invention generally refers to a steel hanging box with a plane size greater than or equal to 500m 2 ; The height of the hanging box is greater than or equal to 12m; the high tidal difference deep water environment of the present invention generally refers to a wave height greater than or equal to 3m; the water level difference during the service period is greater than or equal to 5m, and can reach eight or nine meters.

[0021] like Figure 1 As shown, the first object of the present invention is to provide a double-walled steel hanging box suitable for use in a high tide and deep water environment, comprising a wall bottom section, a wall middle section and a wall top section which are arranged in sequence from bottom to top as one body, the wall middle section being a hollow closed cabin and water never enters the cabin, the section top of the wall middle section being located below the low tide level, the buoyancy provided by the wall middle section being less than the dead weight of the double-walled steel hanging box, the wall middle section being firmly welded to the wall bottom section and the wall top section so that the hollow structure of the sandwich wall of the wall bottom section and the wall top section is watertight; the wall bottom section is filled with water, the wall top section is located at the lower part of the inner wall plate and is provided with a connecting hole connected to the hollow structure of the sandwich wall, which is used to balance the water level inside and outside the sandwich wall of the wall top section.

[0022] The present application provides a double-walled steel hanging box suitable for use in a high tide and deep water environment, which mainly includes a bottom section of a double-walled steel hanging box wall, a middle section of a double-walled steel hanging box wall (the top of the middle section of the wall is located below the low tide level), a top section of a double-walled steel hanging box wall, an inner connecting vessel 2, an outer connecting vessel 5, a vent valve 3, a connecting valve 4, a connecting hole 1, a connecting pipe 6, and a limiting device.

[0023] The bottom section and top section of the double-walled steel hanging box are both conventional double-walled steel hanging box structures, with a hollow structure inside the sandwich wall; the middle section of the double-walled steel hanging box is a closed cabin, which is never filled with water to provide constant buoyancy. The buoyancy provided by the middle section of the wall is slightly less than the deadweight of the steel hanging box. The middle section of the wall is firmly welded to the bottom section and the top section of the wall, respectively, and the hollow structure inside the sandwich wall of the bottom section and the top section of the wall is guaranteed to be watertight, and the top plate of the middle section of the wall is located below the low tide level. The connecting hole is located at the lower part of the inner wall plate of the top section of the wall, and penetrates the inner wall plate of the bottom section of the wall to connect the hollow structure inside the bottom section of the wall with the outside of the steel hanging box, which is used to balance the water level inside and outside the sandwich wall of the top section of the wall.

[0024] The bottom section of the wall body is provided with an internal communicating vessel that penetrates the hollow structure of the sandwich wall at the position below the inner wall plate, which is used to automatically fill water and sink when the steel hanging box is lowered; the bottom section of the wall body is provided with a breathable valve at the position above the inner wall plate, which is used to remove the air in the bottom section of the wall body. The internal communicating vessel is located below the inner wall plate of the bottom section of the wall body, which is used to automatically fill water and sink when the steel hanging box is lowered. The internal communicating vessel penetrates the inner wall plate of the bottom section of the wall body to connect the internal hollow structure of the bottom section of the wall body with the outside of the steel hanging box. The breathable valve is located above the inner wall plate of the bottom section of the wall body, which is used to remove the air in the internal hollow structure of the bottom section of the wall body when water enters the bottom section of the wall body. The breathable valve is also used as a channel to open the connecting valve. The connecting valve is initially in a closed state. When it needs to be opened, the diver enters the sandwich wall of the bottom section of the wall body through the breathable valve, and can cut the steel pipe of the connecting valve to open the connecting valve; the connecting valve can also be sealed with a flange, and the connecting valve can be opened by removing the flange.

[0025] The bottom plate of the middle section of the wall body is provided with a connecting valve, which is used to connect the bottom section of the wall body with the middle section of the wall body. The connecting valve includes a through pipe, on which a flange is provided, and the through pipe is closed by the flange. The connecting valve is located on the bottom plate of the middle section of the wall body, and is used to connect the bottom section of the wall body with the middle section of the wall body.

[0026] An external communicating vessel is provided on the middle section of the wall body, which passes through the inner wall plate and the outer wall plate on both sides of the middle section of the wall body. The external communicating vessel is located below the low tide level and is used to balance the water head difference between the inside and outside of the steel hanging box. The inner communicating vessel and the outer communicating vessel both include a connecting pipe and a valve provided on the connecting pipe. The external communicating vessel passes through the inner wall plate and the outer wall plate of the middle section of the wall body to connect the outside of the bottom section of the wall body with the inside of the steel hanging box. The external communicating vessel is located below the low tide level and is used to balance the water head difference between the inside and outside of the steel hanging box. Preferably, the external communicating vessel is located on the middle section wall body, at a higher position, so that construction personnel can dive underwater for operation. The external communicating vessel connects the inside and outside of the entire steel hanging box, and is not connected to the inside of the sandwich wall of the middle section of the wall body. Both the inner communicating vessel and the outer communicating vessel can be set as a pipeline, and the closure and connection of the pipeline can be achieved by setting a valve.

[0027] A connecting pipe is arranged on the top plate of the middle section of the wall body, and its lower end is connected to the hollow structure of the sandwich wall of the middle section of the wall body, and the upper end of the connecting pipe is connected to the outside of the top section of the wall body. The connecting pipe is located on the top plate of the middle section of the wall body, and the lower end of the connecting pipe is connected to the internal hollow structure of the middle section of the wall body, and the upper end of the connecting pipe is connected to the outside of the top section of the wall body, and is used to connect the sandwich wall of the middle section of the wall body with the external atmosphere, and at the same time serves as a channel for removing water from the buoyancy chamber, i.e., the sandwich wall of the middle section of the wall body, and the bottom section of the wall body.

[0028] A limiting device is also provided above the top section of the wall body, which includes a hanging leg and a hanging beam connected as an integral whole. The hanging leg is located at the top of the steel hanging box, i.e., the top of the top section of the wall body. The hanging beam is provided on the steel casing for vertically limiting the steel hanging box. The bearing capacity of the limiting device is the difference between the deadweight of the steel hanging box and the buoyancy provided by the middle section of the wall body.

[0029] The second object of the present invention is to provide a construction method for vertical positioning of a large-sized double-walled steel hanging box suitable for use in a high tide and deep water environment, comprising the following steps: Step 1: Design the double-walled steel box structure as described in the first objective above.

[0030] Step 2: The floating crane lifts the steel hoisting box as a whole and lowers it. During the lowering process, the inner communicating vessel, outer communicating vessel and air vent valve are all in the open state, and the connecting valve is in the closed state.

[0031] Step 3: After the steel hanging box is put into water, before it floats by itself, the internal communicating vessel is submerged in water, and water is automatically injected into the bottom section of the wall body. The gas in the bottom section of the wall body is discharged through the air valve until the bottom section of the wall body is filled with water.

[0032] Step 4: The floating crane slowly descends with load, and the middle section of the wall is immersed in water. The middle section of the wall never enters water, which provides buoyancy for the steel hanging box and reduces the floating crane load. If the middle section of the wall leaks, a water pump can be used to pump out the water in the middle section of the wall through the connecting pipe.

[0033] Step 5: The top section of the wall is gradually submerged in water, and water enters the top section of the wall through the connecting holes at the bottom of the inner wall plate of the top section of the wall, maintaining the balance of the water level inside the clamping wall of the top section of the wall and the water level outside the steel hanging box.

[0034] Step 6: The steel hoisting box slowly drops down until it is in place, the hanging legs are stably placed on the steel casing through the hanging beams, and the floating hook is released.

[0035] Step 7: As the tide rises and falls, the connecting hole at the bottom of the inner wall plate of the top section of the wall maintains the water level inside the top section of the wall consistent with the water level outside the steel hanging box. The top section of the wall does not provide buoyancy; the middle section of the wall never enters with water, providing constant buoyancy for the steel hanging box.

[0036] Step 8: Install the pull rod and bottom plate 7 blocking plate at the bottom of the steel hanging box, and pour the bottom sealing concrete.

[0037] Arrangement 9: After the bottom concrete reaches the required strength, open the connecting valve at the appropriate water level, close the inner connecting vessel, outer connecting vessel and air valve. Start pumping water in stages in the sandwich wall until the water in the steel hanging box is drained and the water level in the sandwich wall is controlled at the designed elevation.

[0038] 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. A positioning construction method for a double-walled steel hanging box suitable for a high tide and deep water environment, characterized in that: The steps include: Step 1: Design the structure of the double-walled steel hanging box. The double-walled steel hanging box includes a wall bottom section, a wall middle section and a wall top section which are sequentially arranged as one from bottom to top. The wall middle section is a hollow closed cabin and water never enters the cabin. The top of the wall middle section is located below the low tide level. The buoyancy provided by the wall middle section is less than the dead weight of the double-walled steel hanging box. The wall middle section is firmly welded to the wall bottom section and the wall top section so that the hollow structure of the sandwich wall of the wall bottom section and the wall top section is watertight. The wall top section is located at the lower part of the inner wall plate and is provided with a connecting hole connected to the hollow structure of the sandwich wall, which is used to balance the water level inside and outside the sandwich wall of the wall top section. A limiting device is also provided on the top of the wall top section. Step 2: hoist and lower the double-walled steel hanging box as a whole, so that the bottom section of the wall body is filled with water; continue to lower the double-walled steel hanging box, so that the middle section of the wall body is submerged in water, and the middle section of the wall body never enters water, providing constant buoyancy for the steel hanging box; continue to lower the double-walled steel hanging box, so that the top section of the wall body is gradually submerged in water, and water enters the top section of the wall body through the connecting hole at the bottom of the inner wall plate of the top section of the wall body, maintaining the water level in the sandwich wall of the top section of the wall body and the water level outside the steel hanging box in balance; as the tide rises and falls, the connecting hole at the bottom of the inner wall plate of the top section of the wall body maintains the water level in the sandwich wall of the top section of the wall body and the water level outside the steel hanging box to always remain consistent, and the top section of the wall body does not provide buoyancy; Step 3: After lowering into place, place the double-walled steel hanging box on the steel casing through the limiting device.

2. The positioning construction method for a double-walled steel hanging box suitable for a high tide and deep water environment as claimed in claim 1, characterized in that: In the step one, an internal communicating vessel penetrating into the hollow structure of the sandwich wall is provided at a position located at the lower part of the inner wall plate at the bottom section of the wall body, and is used for automatically filling with water and sinking when the steel hanging box is lowered; a breather valve is provided at a position located at the upper part of the inner wall plate at the bottom section of the wall body, and is used for removing air from the bottom section of the wall body; in the step two, when the double-walled steel hanging box is lifted and lowered as a whole, the internal communicating vessel and the breather valve are both in an open state, and after the steel hanging box is put into water, before the steel hanging box floats by itself, the internal communicating vessel is submerged in water, and water is automatically filled into the bottom section of the wall body, and the gas in the bottom section of the wall body is discharged through the breather valve until the bottom section of the wall body is filled with water.

3. The positioning construction method for a double-walled steel hanging box suitable for a high tide and deep water environment as claimed in claim 2, characterized in that: An external communicating vessel is arranged on the middle section of the wall body, which passes through the inner wall plate and the outer wall plate on both sides of the middle section of the wall body. The external communicating vessel is located below the low tide level and is used to balance the water head difference inside and outside the steel hanging box. In the step two, when the double-walled steel hanging box is lifted and lowered as a whole, the external communicating vessel is in an open state.

4. The positioning construction method for a double-walled steel hanging box suitable for a high tide and deep water environment as claimed in claim 3, characterized in that: The inner communicating vessel and the outer communicating vessel both comprise a connecting pipe and a valve arranged on the connecting pipe.

5. The positioning construction method for a double-walled steel hanging box suitable for a high tide and deep water environment as claimed in claim 3, characterized in that: A connecting valve is arranged on the bottom plate of the middle section of the wall body, which is used to connect the bottom section of the wall body with the middle section of the wall body, and the connecting valve includes a through pipe with a flange arranged on it, and the through pipe is closed by the flange; in the step 2, when the steel hanging box is lowered, the connecting valve is in a closed state; the step 3 also includes a step 4: pouring bottom concrete at the bottom of the steel hanging box, and after the bottom concrete reaches the set strength, opening the connecting valve at the set water level, closing the inner connecting vessel, the outer connecting vessel and the air valve, and pumping the water in the sandwich wall of the steel hanging box in stages until the water in the steel hanging box is drained and the water level in the sandwich wall is controlled at the design elevation.

6. The positioning construction method for a double-walled steel hanging box suitable for a high tide and deep water environment as claimed in claim 5, characterized in that: The connecting valve can be opened by: the operator cutting the steel pipe of the connecting valve through the vent valve to open the connecting valve; or by removing the flange to open the connecting valve.

7. The positioning construction method for a double-walled steel hanging box suitable for a high tide and deep water environment as claimed in claim 5, characterized in that: A connecting pipe is arranged on the top plate of the middle section of the wall body, the lower end of which is connected to the hollow structure of the sandwich wall of the middle section of the wall body, and the upper end of the connecting pipe is connected to the outside of the top section of the wall body. The connecting pipe is used to connect the sandwich wall of the middle section of the wall body with the external atmosphere, and is also used to discharge water in the sandwich wall of the steel hanging box.

8. The positioning construction method for a double-walled steel hanging box applicable to a high tide and deep water environment as claimed in claim 1, characterized in that: A limiting device is also provided above the top section of the wall body, which includes a hanging leg and a hanging beam connected as an integral whole. The hanging leg is located at the top of the steel hanging box, and the hanging beam is arranged on the steel casing for vertically limiting the steel hanging box. The bearing capacity of the limiting device is the difference between the deadweight of the steel hanging box and the buoyancy provided by the middle section of the wall body.

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