In-situ dismantling method for waste invalid floating dock gate

Abstract

The invention relates to the field of floating dock gates, and particularly discloses an in-situ dismantling method for a waste invalid floating dock gate. The construction technology comprises the steps of model measurement and scheme making, water retaining system establishment, construction platform preparation, construction environment optimization, horizontal plate dismantling, side plate dismantling, plate transferring and the like. According to the technology, a water stop system is built in a dock entrance area, water pumping in the dock entrance area is achieved, a dry construction environment is formed, segmented pre-cutting is conducted on the dock gate according to actual working conditions, cutting design is conducted according to the sequence of a horizontal plate, a side plate, a longitudinal beam and a cross beam, and regional pre-cutting is conducted on the whole floating dock gate under the condition that the longitudinal beam is large; the steel plate is hoisted layer by layer and piece by piece in combination with hoisting of a crane, under the condition that a longitudinal beam is small, the steel plate is vertically and transversely cut in combination with the hoisting capacity of the crane, key connecting parts are reserved to ensure stability, stable cutting, transferring and disassembling are achieved, the difficulty and the risk coefficient of underwater cutting are avoided, and meanwhile the hoisting difficulty is low layer by layer and piece by piece.

Description

Technical Field

[0001] The invention relates to the field of floating dock doors, in particular to an in-situ dismantling method for waste and invalid floating dock doors. Background Art

[0002] The removal of floating dock gates is an important part of dock projects and a key link in port transformation and functional optimization. With the rapid development of the global marine economy and the increasing demand for modernization of port facilities, a large number of old docks have been gradually abandoned due to backward technical standards, high maintenance costs or incompatibility with modern port functional requirements. The removal of floating dock gates, as the core structure connecting the dock and the external waters, not only directly affects the functional release of the dock, but also affects the smooth progress of subsequent construction and the effective restoration of the ecological environment. Due to their special structural design, the possibility of reuse of old floating dock gates is extremely low, and the traditional removal method is limited by the water environment, the failure of the closed air chamber and the failure of the drainage system, which makes it difficult for the floating dock gates to float and transfer to a dry environment for treatment.

[0003] However, the traditional method of dismantling a floating dock door is to use underwater cutting, in which the floating dock door is dismantled as a whole and then cut into pieces. The underwater cutting method has high construction costs and great safety risks. Summary of the invention

[0004] In view of the existing problems, the present invention provides an in-situ dismantling method for obsolete and ineffective floating dock doors. The device can be used in conjunction with other devices to effectively solve the problems raised in the background technology.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A method for in-situ dismantling of a waste and invalid floating dock door, the process comprising the following steps:

[0007] S1: Model measurement and solution formulation

[0008] Conduct on-site measurements and model calculations on the floating dock gate to determine the center of gravity and force distribution of the floating dock gate. Implement simple reinforcement measures for areas that deviate from the foundation or are insufficiently supported, such as adding steel supports and welding stiffening plates to ensure overall stability during the demolition process.

[0009] S2: Establishment of water retaining system

[0010] A water retaining cofferdam is built at the dock entrance to form a water retaining system, a closed water isolation area is formed outside the dock entrance, and the water in the water retaining cofferdam and the dock entrance is drained by using pumping equipment;

[0011] S3: Construction platform preparation

[0012] Ensure the safety of workers and the quality of work throughout the pre-construction and construction process by adding construction platforms (such as wooden springboards or walkways) at different locations of the dock and installing safety ropes at the guardrails;

[0013] S4: Construction environment optimization

[0014] Before construction, the inside of the floating dock door is ventilated with a blower to detect and remove flammable, explosive or toxic gases to ensure construction safety.

[0015] S5: Horizontal plate removal

[0016] Marking and pre-cutting are performed according to the stress state of the horizontal plate at the top of the floating dock door;

[0017] S6: Side panel removal

[0018] According to the internal structure of the floating dock door, the cutting design is carried out by using the supporting effect of the longitudinal beams and cross beams on the side plates. In the case of large longitudinal beams, the longitudinal beams are used as the supporting base points to pre-cut the side plates in different areas. In the case of small longitudinal beams, the steel plates are cut vertically and horizontally in combination with the lifting capacity of the crane, and the key connection parts are retained to ensure stability.

[0019] S7: Sheet material transfer

[0020] After pre-cutting, the floating dock door components are hoisted layer by layer and piece by piece using lifting equipment. During the hoisting process, the lifting point position and hoisting speed must be strictly controlled to ensure the smooth transfer and disassembly of each structure.

[0021] As a further solution of the present invention: in step S2, the water retaining cofferdam is staggered with double rows of steel plates to avoid water seepage at the joints, creating a dry construction environment to prevent water from seeping into the construction process and affecting the operation.

[0022] As a further solution of the present invention: in the step S1, the cross-sectional structure of the floating dock door is a rectangular structure at the bottom and a trapezoidal structure at the top, and the center of gravity is evenly distributed. The floating dock door is divided into three parts in the longitudinal direction according to the ratio of 2:1:2, and a 3D model is established to formulate a cutting plan.

[0023] As a further solution of the present invention: in the step S5, the horizontal plate is marked and pre-cut by mechanical calculation. In this process, some uncut steel plates are reserved (i.e., staggered cutting). The reserved steel plates are used to bear the weight of the horizontal plate and the construction workers to maintain the stability of the structure. After the pre-cutting of the entire horizontal plate is completed, the horizontal plate is suspended by a car crane to cut the reserved seams. Finally, the workers who perform the cutting stand on an additional working platform (such as a wooden springboard that can bear the weight of the workers) to complete the dismantling of the horizontal plate piece by piece.

[0024] As a further solution of the present invention: in the step S6, after the cutting of the horizontal plate is completed, a channel leaking out after the cutting of the horizontal plate is set to enter the first layer of the floating dock door, and observe and confirm whether there are longitudinal and transverse reinforced steel beams inside the floating dock door. When encountering larger longitudinal beams (the size of the longitudinal beams is mainly determined by the lifting capacity of the crane used and the economic analysis), the supporting effect of the longitudinal stiffening steel beams on the stability of the side plates is fully utilized when cutting the side plates, a working platform for workers (such as scaffolding) is built at the side wall position, and the steel plates and some cross beams are pre-marked and pre-cut according to mechanical calculations to ensure the stability of the structure during the cutting process.

[0025] As a further solution of the present invention: in step S6, when encountering a smaller longitudinal beam, the steel plate is pre-cut vertically and horizontally. During the cutting process, the connection integrity between the longitudinal beam and the outer steel plate is retained to ensure the structural stability and integrity of the side plate before removal.

[0026] As a further solution of the present invention: in the step S2, before the dock is lowered, the floating dock door is tied to the embedded parts of the dock by installing an I-beam on the top to avoid displacement of the floating dock door during the lowering process. At the same time, it is monitored for several days to ensure the stability of the position of the floating dock door. After the water is pumped out, a cable tie is set at the bottom of the floating dock door to ensure the stability of the floating dock door.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. This process combines the construction of a water-stop system in the dock area to achieve pumping out water in the dock area to form a dry construction environment. The dock door is pre-cut in sections according to actual working conditions, and the cutting design is carried out in the order of horizontal plates, side plates, longitudinal beams and cross beams. For large longitudinal beams, the entire floating dock door is pre-cut in sections, and the crane is used to lift the dock door layer by layer, thereby achieving smooth cutting, transfer and disassembly, avoiding the difficulty and risk factor of underwater cutting, and the difficulty of lifting the dock door layer by layer is relatively low.

[0029] 2. Through the implementation of the water-stop structure, dry operations can be achieved without moving the failed dock door, avoiding underwater cutting operations and reducing operation risks. The dock door structure itself is fully utilized to form working conditions, without the need to set up large platforms such as full-height scaffolding and use aerial platforms, and has a higher cutting efficiency.

[0030] 3. The water retaining cofferdam adopts double rows of steel plates for staggered layout to avoid water seepage at the joints and create a dry construction environment to avoid water seepage during construction and affect the operation, thus improving the efficiency of the entire cutting process.

[0031] 4. The cutting adopts the staggered cutting method. The reserved steel plate is used to bear the weight of the horizontal plate and the construction workers to maintain the stability of the structure. After the pre-cutting of the entire horizontal plate is completed, the horizontal plate is suspended by a car crane to cut the reserved seam. Finally, the workers who perform the cutting stand on the additional springboard to cut the remaining plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A structural schematic diagram of an in-situ dismantling method for a waste and invalid floating dock door;

[0033] Figure 2 A schematic diagram of the structure of a floating dock door in a method for in-situ removal of a waste and invalid floating dock door;

[0034] Figure 3 A longitudinal cross-sectional view of a floating dock door in a method for in-situ removal of an old and invalid floating dock door;

[0035] Figure 4 The present invention is a transverse cross-sectional view of a floating dock door in a method for in-situ dismantling of an obsolete and invalid floating dock door.

[0036] In the figure: 1. Floating dock door; 2. Water retaining cofferdam; 3. Guardrail; 4. Gangway; 5. Safety rope; 6. Hatch door; 7. Blower; 8. I-beam. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with specific inventions, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0038] In the description of this specification, the description with reference to the terms "this embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0039] like Figure 1-4 As shown, this embodiment provides a method for in-situ removal of a waste and invalid floating dock door, which specifically includes the following steps:

[0040] S1: Model measurement and solution formulation

[0041] Conduct on-site measurement and model calculation for the floating dock gate 1 to determine the center of gravity and force distribution of the floating dock gate 1, implement simple reinforcement measures for areas that deviate from the foundation or are insufficiently supported, add steel supports and weld stiffening plates to ensure overall stability during the demolition process;

[0042] S2: Establishment of water retaining system

[0043] A water retaining cofferdam 2 is constructed at the location of the floating dock gate 1 to form a water retaining system, a closed water isolation area is formed outside the floating dock gate 1, and the water in the water retaining cofferdam 2 and the floating dock gate 1 is drained by using pumping equipment;

[0044] S3: Construction platform preparation

[0045] To ensure the safety of workers and the quality of work during the entire pre-construction and construction process, construction platforms such as wooden springboards 4 or walkways are added at different positions of the floating dock door 1 and safety ropes 5 are installed at the guardrail 3;

[0046] S4: Construction environment optimization

[0047] Before construction, the interior of the floating dock door 1 is ventilated by using a blower 7 to ventilate the hatch 6 of the internal sealed air compartment, detect and remove flammable, explosive or toxic gases, and ensure construction safety;

[0048] S5: Horizontal plate removal

[0049] Marking and pre-cutting are performed according to the stress state of the horizontal plate at the top of the floating dock door;

[0050] S6: Side panel removal

[0051] According to the internal structure of the floating dock door 1, the cutting design is carried out by using the supporting effect of the longitudinal beams and the transverse beams on the side plates. In the case of a large longitudinal beam, the longitudinal beam is used as the supporting base point to pre-cut the side plates in different areas. In the case of a small longitudinal beam, the steel plate is cut vertically and horizontally in combination with the lifting capacity of the crane, and the key connection parts are retained to ensure stability;

[0052] S7: Sheet material transfer

[0053] After the pre-cutting is completed, the floating dock door 1 components are hoisted layer by layer and piece by piece using lifting equipment. During the hoisting process, the lifting point position and hoisting speed must be strictly controlled to ensure the smooth transfer and disassembly of each structure.

[0054] like Figure 2-3As shown, in this embodiment, in step S2, the water retaining cofferdam 2 is staggered with double rows of steel plates to avoid water seepage at the joint position, create a dry construction environment, and avoid water seepage during the construction process to affect the operation. In step S1, the cross-sectional structure of the floating dock door 1 is a rectangular structure at the bottom and a trapezoidal structure at the top, and the center of gravity is evenly distributed. The floating dock door is divided into three parts in the longitudinal direction according to the ratio of 2:1:2, and a 3D model is established to formulate a cutting plan. In step S5, the horizontal plate is marked and pre-cut by mechanical calculation. In this process, some uncut steel plates are reserved (i.e., staggered cutting). The reserved steel plates are used to bear the dead weight of the horizontal plate and the construction workers to maintain the stability of the structure. After the pre-cutting of the entire horizontal plate is completed, the horizontal plate is suspended by a car crane to cut the reserved seam. Finally, the worker who performs the cutting stands on an additional working platform (such as a wooden springboard that can bear the weight of the worker) to complete the removal of the horizontal plate piece by piece. In step S6, after the cutting of the horizontal plate is completed, a channel leaked after the cutting of the horizontal plate is set to enter Inside the first layer of the floating dock door 1, observe and confirm whether there are longitudinal and transverse reinforced steel beams inside the floating dock door 1. When encountering a larger longitudinal beam (the size of the longitudinal beam is mainly determined by the lifting capacity of the crane used and the economic analysis), the longitudinal reinforced steel beam is fully utilized to support the stability of the side plate when cutting the side plate. A worker working platform (such as scaffolding) is built at the side wall position, and the steel plate and part of the cross beam are pre-marked and pre-cut according to mechanical calculations to ensure the stability of the structure during the cutting process. In step S6, When encountering a smaller longitudinal beam, the steel plate is pre-cut vertically and horizontally. During the cutting process, the connection integrity between the longitudinal beam and the outer steel plate is retained to ensure the structural stability and integrity of the side plate before removal. In step S2, before the dock is lowered, the floating dock door is tied to the embedded parts of the dock by installing an I-beam 8 on the top to avoid displacement of the floating dock door during the lowering process. At the same time, it is monitored for several days to ensure the stability of the position of the floating dock door. After pumping is completed, a diagonal stay is set at the bottom of the floating dock door to ensure the stability of the floating dock door.

[0055] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0056] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for in-situ removal of obsolete and ineffective floating dock doors, characterized in that: The removal process comprises the following steps: S1: Model measurement and program development; Conduct on-site measurements and model calculations on the floating dock gate to determine the center of gravity and force distribution of the floating dock gate. Implement simple reinforcement measures for areas that deviate from the foundation or are insufficiently supported, increase steel supports, and weld stiffening plates to ensure overall stability during the demolition process. S2: Establishment of water retaining system; A water retaining cofferdam is built at the dock entrance to form a water retaining system, a closed water isolation area is formed outside the dock entrance, and the water in the water retaining cofferdam and the dock entrance is drained by using pumping equipment; S3: Construction platform preparation; Ensure the safety of workers and the quality of work throughout the pre-construction and construction process by adding construction platforms at different locations of the dock and installing safety ropes at the guardrails; S4: Construction environment optimization; Before construction of the floating dock door, use a blower to ventilate the internal closed air compartment to detect and remove flammable, explosive or toxic gases; S5: Horizontal plate removal Marking and pre-cutting are performed according to the stress state of the horizontal plate at the top of the floating dock door; S6: Side panel removal According to the internal structure of the floating dock door, the cutting design is carried out by using the supporting effect of the longitudinal beams and cross beams on the side plates. In the case of large longitudinal beams, the longitudinal beams are used as the supporting base points to pre-cut the side plates in different areas. In the case of small longitudinal beams, the steel plates are cut vertically and horizontally in combination with the lifting capacity of the crane, and the key connection parts are retained to ensure stability. S7: Sheet material transfer After pre-cutting, the floating dock door components are hoisted layer by layer and piece by piece using lifting equipment. During the hoisting process, the lifting point position and hoisting speed must be strictly controlled to ensure the smooth transfer and disassembly of each structure.

2. The in-situ dismantling method of a waste and invalid floating dock door according to claim 1 is characterized in that: In step S2, the water retaining cofferdam is staggered with double rows of steel plates to avoid water seepage at the joints and create a dry construction environment.

3. The method for in-situ removal of a waste and invalid floating dock door according to claim 1, characterized in that: In step S1, the cross-sectional structure of the floating dock door is a rectangular structure at the bottom and a trapezoidal structure at the top, and the center of gravity is evenly distributed. The floating dock door is divided into three parts in the longitudinal direction according to the ratio of 2:1:2, and a 3D model is established to formulate a cutting plan.

4. The in-situ dismantling method of a waste and invalid floating dock door according to claim 1 is characterized in that: In step S5, the horizontal plate is marked and pre-cut by mechanical calculation. In this process, some uncut steel plates are reserved to bear the weight of the horizontal plate and the construction workers and maintain the stability of the structure. After the pre-cutting of the entire horizontal plate is completed, the horizontal plate is suspended by a car crane to cut the reserved seams. Finally, the workers who perform the cutting stand on an additional working platform to complete the dismantling of the horizontal plate piece by piece.

5. The in-situ dismantling method of a waste and invalid floating dock door according to claim 1 is characterized in that: In step S6, after the cutting of the horizontal plate is completed, a channel leaking out after the cutting of the horizontal plate is set to enter the first layer of the floating dock door, and observe and confirm whether there are longitudinal and transverse reinforced steel beams inside the floating dock door. When encountering larger longitudinal beams, the supporting effect of the longitudinal stiffening steel beams on the stability of the side plates is fully utilized when cutting the side plates. A working platform for workers is built at the side wall position, and the steel plates and some cross beams are pre-marked and pre-cut according to mechanical calculations.

6. The in-situ dismantling method of a waste and invalid floating dock door according to claim 1 is characterized in that: In step S6, when a smaller longitudinal beam is encountered, the steel plate is pre-cut vertically and horizontally, and during the cutting process, the connection between the longitudinal beam and the outer steel plate is kept intact.

7. The in-situ dismantling method of a waste and invalid floating dock door according to claim 1 is characterized in that: In step S2, before the dock is lowered, the floating dock door is tied to the embedded parts of the dock by installing I-beams on the top to avoid displacement of the floating dock door during the lowering process. At the same time, monitoring is carried out for several days to ensure the stability of the position of the floating dock door. After pumping is completed, a diagonal stay is set at the bottom of the floating dock door.

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