Temporary operation platform for underwater construction and construction method

Abstract

The invention discloses a temporary operation platform for underwater construction. The platform can sink and float upwards in water by changing the gravity of the platform. The platform comprises a sinking and floating pedestal which is of a hollow structure and forms a medium cavity; the medium cavity forms a closed space for accommodating a medium; a plurality of through holes corresponding to each other in number and position are formed in the foundation plate and the top wall of the sinking and floating pedestal in a penetrating manner; the number of the pipelines is the same as that of the through holes, and the pipelines are correspondingly inserted into the through holes; each through hole and one pipeline form a group of medium exchange passages, so that the exchange between the medium in the closed medium cavity and the outside is realized; the method has the advantages of saving construction investment and improving construction efficiency.

Description

Technical Field

[0001] The invention belongs to the field of water construction, and in particular relates to a temporary working platform for water construction and a construction method. Background Art

[0002] In the existing technology, water operations require artificial installation of temporary water construction measures such as steel cofferdams, steel trestles, and steel platforms, which require a lot of construction investment and are difficult to construct. Therefore, if a temporary water construction platform is prefabricated on the ground and positioned and sunk in the water, it can greatly reduce construction costs and ease construction difficulty. Summary of the invention

[0003] The purpose of the present invention is to provide a temporary underwater construction work platform and a construction method, which has the advantages of saving construction investment and improving construction efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides a temporary work platform for underwater construction, which can sink and float in water by changing its own gravity; the platform includes: a sinking and floating pedestal with a hollow structure inside to form a medium cavity; the medium cavity forms a closed space that can be used to accommodate a medium; a base plate is horizontally fixed on the top wall of the sinking and floating pedestal for carrying work equipment; a number of through holes corresponding in number and position are opened on the base plate and the top wall of the sinking and floating pedestal; a number of pipes, the same number as the through holes, are respectively inserted into the through holes; each of the through holes forms a group of medium exchange passages with a pipe, so as to realize the exchange of the medium in the closed medium cavity with the outside.

[0005] Preferably, the pipeline and the base plate form a contact profile due to the opening of through holes; a sealing component matching the contact profile is arranged between the base plate and each pipeline.

[0006] Preferably, the sealing component is a waterproof sealing ring.

[0007] Preferably, the medium includes: water, or high-concentration salt water, or cement, or filler.

[0008] Preferably, the platform further comprises: a plurality of partition plates vertically arranged in the medium cavity, wherein the partition plates divide the enclosed space of the medium cavity into a plurality of enclosed sub-spaces.

[0009] Preferably, any of the enclosed subspaces is provided with a corresponding medium exchange passage to achieve the exchange of the medium in each enclosed subspace with the outside.

[0010] Preferably, some of the enclosed subspaces are provided with corresponding medium exchange passages to realize the exchange of the medium in these enclosed subspaces with the outside; some of the enclosed subspaces are not provided with corresponding medium exchange passages and do not exchange the medium with the outside.

[0011] A construction method for a temporary underwater construction work platform adopts the aforementioned temporary underwater construction work platform, and the method comprises: step S1, prefabricating the temporary underwater construction work platform, and pushing it onto the water through a traction device after prefabrication; step S2, injecting a medium into a closed space / closed subspace of a medium cavity through a pipeline to ensure that the platform is in a semi-submerged state and is overall stable, and floating the platform to a designated sinking position through a traction device; step S3, adjusting the traction device to accurately position the platform, and after positioning is completed, continuously injecting the medium into the closed space / closed subspace of the medium cavity until sinking is completed; step S4, after sinking is completed, further adding part of the medium into the closed space / closed subspace of the medium cavity, so that the temporary underwater bridge construction work platform is stably fixed on the riverbed / seabed.

[0012] Preferably, the method further includes: step S5, extracting part of the gas in the enclosed space / enclosed subspace of the medium cavity; if there is no gas inside, appropriately extracting part of the medium and then extracting part of the gas without affecting the stability; so as to achieve a negative pressure state inside the enclosed space of the medium cavity, so that the platform can be stably fixed on the riverbed / seabed.

[0013] Preferably, the method further includes: step S6, extracting part of the medium in the enclosed space / enclosed subspace of the medium cavity to make the platform semi-submerged and overall stable; step S7, floating the platform to the next designated position by means of traction equipment; step S8, executing steps S3 to S4 to achieve the reuse of the temporary work platform for underwater construction.

[0014] In summary, compared with the prior art, the temporary underwater construction platform and construction method provided by the present invention have the following beneficial effects:

[0015] First, the present invention can facilitate underwater construction, replace temporary measures for water construction such as steel cofferdams, steel trestles, and steel platforms, and is suitable for offshore or deep-water construction operations.

[0016] Second, the temporary working platform of the present invention is prefabricated on the ground, and is positioned and sunk in water.

[0017] Third, the present invention can be reused, which can greatly reduce construction costs and reduce construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the present invention without a closed subspace.

[0019] Figure 2 It is a front view of the enclosed subspace of the present invention.

[0020] Figure 3A top view showing that any of the enclosed subspaces of the present invention is provided with a corresponding medium exchange passage.

[0021] Figure 4 The figure is a schematic diagram of an operation in one embodiment of the present invention.

[0022] Figure 5 A top view showing that some of the enclosed subspaces of the present invention are provided with corresponding medium exchange passages, while some of the enclosed subspaces are not provided with corresponding medium exchange passages.

[0023] Figure 6 The present invention provides a flow chart of the construction method.

[0024] Reference numerals:

[0025] 1-medium cavity, 101-through hole, 102-spacer plate, 2-base plate, 3-pipeline. DETAILED DESCRIPTION

[0026] The following will be combined with the attached embodiment of the present invention Figure 1 ~Attached Figure 6 , the technical solutions, structural features, objectives achieved and effects in the embodiments of the present invention are described in detail.

[0027] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0028] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] The invention provides a temporary underwater construction operation platform for water construction operations. The platform can sink and float in water by changing its own gravity.

[0030] like Figure 1 As shown, the platform includes:

[0031] The sinking and floating pedestal 4 has a hollow structure inside, forming a medium cavity 1; the medium cavity 1 is a closed space for accommodating the medium;

[0032] The medium includes but is not limited to water, high-concentration salt water, cement, filler, etc. The platform changes the total weight of the medium in the closed medium cavity 1 to change the overall weight of the platform, thereby enabling it to sink and float in water;

[0033] A base plate 2 is horizontally fixed on the top wall of the sinking and floating pedestal 4 and is used to carry operating equipment;

[0034] The base plate 2 and the top wall of the sinking and floating platform 4 are penetrated by a plurality of through holes 101 of corresponding quantity and position;

[0035] A plurality of pipes 3 , the number of which is the same as the through holes 101 , are respectively inserted into the through holes 101 and arranged to correspond to each other, so that the medium can be injected into or flow out of the medium cavity 1 through the pipes 3 .

[0036] The principle here is that Figure 1 As shown, each of the through holes 101 forms a set of medium exchange passages with a pipe 3, so that the medium in the closed medium cavity 1 can be exchanged with the outside, thereby realizing the change of the platform's own weight and floating and sinking in the water.

[0037] Specifically, when there is no medium in the closed medium cavity 1, the closed medium cavity 1 is filled with air, then the buoyancy is naturally greater than the weight of the platform, and the platform is in a state of floating on the water surface; the medium is injected into the closed medium cavity 1 through the pipe 3, and the weight of the platform increases at this time, and when its weight is greater than the buoyancy, it sinks in the water; when the platform needs to float, the medium in the closed medium cavity 1 is discharged through the pipe 3, and the weight of the platform is reduced at this time, because the buoyancy of the platform itself is greater than the weight of the platform, the platform floats accordingly.

[0038] In addition, the structures of the base plate 2 and the floating pedestal 4 should correspond to each other, that is, the top surface shape of the floating pedestal 4 is consistent with the shape of the base plate 2; if the floating pedestal 4 is set as a columnar structure with a square cross-section, then the base plate 2 should also be set as a corresponding square structure and covered on the floating pedestal 4; similarly, if the floating pedestal 4 is a columnar structure with a "U"-shaped cross-section, then the base plate 2 should also be set as a "U"-shaped structure and covered on the floating pedestal 4; through this operation, stability can be achieved during the installation process to prevent the situation where there is no corresponding top wall of the floating pedestal 4 at the bottom of the base plate 2.

[0039] In specific applications, because the top wall of the buoyancy base 4 is provided with a through hole 101, problems such as airtightness may arise. Because when sinking in water, if the pipe 3 is not set to form a sealed fit with the base plate 2 and the contact surface of the top wall of the buoyancy base 4, water seepage will occur in the medium cavity 1.

[0040] Based on the above, a solution is proposed below:

[0041] The pipe 3 and the base plate 2 form a contact profile due to the through hole 101, and a sealing component matching the contact profile can be provided between the base plate 2 and the pipe 3 to prevent the medium in the medium cavity 1 from leaking in reverse during the sinking process of the platform, or water from penetrating into the medium cavity 1 when the platform is working in water. Specifically, the sealing component can be a waterproof sealing ring.

[0042] In a preferred embodiment, if Figure 2 and Figure 3 As shown (wherein, since the through hole 101 coincides with the pipeline 3, the pipeline 3 is not marked), the platform also includes:

[0043] A plurality of partition plates 102 are vertically arranged in the medium cavity 1 , and the partition plates 102 divide the closed space of the medium cavity 1 into a plurality of closed sub-spaces.

[0044] By providing the partition plates 102, a number of closed sub-spaces are formed, which makes it more convenient to inject and discharge the medium and the weight is easier to control.

[0045] At this point, it should be noted that any of the enclosed subspaces should be provided with a corresponding medium exchange passage, that is, the top of each enclosed subspace penetrates the top wall of the buoyancy pedestal 4 and the base plate 2 to form a through hole 101, and a pipe 3 is correspondingly inserted into each through hole 101, thereby forming a medium exchange passage for realizing the exchange of medium between the enclosed subspace and the outside.

[0046] In another preferred embodiment, Figure 5 As shown, in order to cope with certain special waters, such as those with a higher water density, a platform that is originally heavier can be designed for the waters for the convenience of operation. Specifically, by reasonably arranging the partition plates 102 and the arrangement of the medium exchange passages, part of the enclosed subspaces can be made to have no medium exchange with the outside, thereby increasing the inherent weight of the platform.

[0047] For example, in some waters with high water density, some closed subspaces are not equipped with corresponding medium exchange passages; accordingly, these closed subspaces are filled with high-density media, such as cement, etc.; this is equivalent to the platform having a certain inherent weight at this time, which facilitates pre-sinking in such special waters and reduces subsequent workload.

[0048] like Figure 3 and Figure 5 As shown, two specific embodiments are introduced. The sinking and floating pedestal 4 adopts a columnar structure with a hollow structure in the middle and a "U"-shaped cross-section; as mentioned above, the structure of the base plate 2 is arranged corresponding to the sinking and floating pedestal 4, so the base plate 2 is arranged as a "U"-shaped structure and covers the sinking and floating pedestal 4.

[0049] Moreover, in both embodiments, the medium cavity 1 adopts the same layout, and a plurality of partition plates 102 are arranged in the same manner. The partition plates 102 are vertically arranged in the medium cavity 1, and the enclosed space of the medium cavity 1 is divided into 8 enclosed subspaces through a "well" shape distribution, namely a / b / c / d / e / f / g / h enclosed subspaces.

[0050] Two embodiments are described in detail below:

[0051] (1) Any of the enclosed subspaces is provided with a corresponding medium exchange passage

[0052] like Figure 3 As shown, the a / b / c / d / e / f / g / h closed subspaces have a through hole 101 at the top (i.e., the top wall of the corresponding sinking and floating pedestal 4) of each closed subspace, and a corresponding pipeline 3 is provided to realize medium circulation;

[0053] In this embodiment, since a large amount of medium exchange will occur, a medium with good fluidity, such as water, etc., can be used.

[0054] (ii) Some of the enclosed subspaces are provided with corresponding medium exchange passages, while some of the enclosed subspaces are not provided with corresponding medium exchange passages

[0055] like Figure 5 As shown, only the four closed subspaces a / c / f / h located at the corners have a through hole 101 on the top of each closed subspace, and are provided with corresponding pipes 3 to realize medium circulation; while the remaining four closed subspaces b / d / e / g are not provided with corresponding medium exchange passages;

[0056] In this embodiment, the medium inside the closed subspace without a corresponding medium exchange passage will not be exchanged with the outside, and a medium with poor fluidity or even no fluidity can be selected, such as cement, filler, etc.; and for the closed subspace with a corresponding medium exchange passage, as mentioned above, a medium with good fluidity, such as water, etc. should be selected.

[0057] The above are merely illustrations of two embodiments. The arrangement of the partition plate 102 may be adjusted accordingly according to actual conditions to achieve arrangements and combinations of different enclosed subspaces.

[0058] In terms of the use of the platform, the platform is prefabricated first and then sunk in water for installation; it can float up and be reused. This method can effectively save construction investment and thus improve construction efficiency. The corresponding structure can be adjusted to adapt to the specific environment according to the bottom terrain and elevation of the riverbed / seabed at the sinking position.

[0059] In this regard, the present invention also proposes a construction method for a temporary working platform in water:

[0060] Step S1, prefabricate a temporary underwater construction work platform, and after prefabrication, push it horizontally onto the water through a traction device;

[0061] Step S2, injecting medium into the enclosed space / enclosed subspace of the medium chamber 1 through the pipeline 3 to ensure that the platform is in a semi-submerged state and is overall stable, and floating the platform to a designated sinking position through a traction device;

[0062] Step S3, adjusting the traction equipment to accurately position the platform, and after positioning is completed, continuously injecting the medium into the enclosed space / enclosed subspace of the medium cavity 1 until the platform is completely sunk;

[0063] Step S4, after sinking is completed, further add some medium into the enclosed space / enclosed subspace of the medium cavity 1, so that the temporary working platform for underwater bridge construction can be stably fixed on the riverbed / seabed; if the space in the enclosed space / enclosed subspace is exhausted and cannot be sunk, or the medium cannot be added excessively, resulting in it being unable to be well and stably fixed; at this time, return to step S1, and prefabricate the temporary working platform for underwater construction according to the riverbed / seabed and water conditions.

[0064] The traction equipment may be in the form of a ship, and several ships may be arranged for traction and positioning, for example Figure 4 As shown, two ships, a transport ship and a positioning ship, were used to ensure smooth transportation and positioning and sinking of the platform.

[0065] Furthermore, the construction method can also utilize the principle of negative pressure of gas in the enclosed space / enclosed subspace of the medium cavity 1 to further achieve the stability of the platform.

[0066] Specifically, the construction method further includes:

[0067] Step S5, extracting part of the gas in the enclosed space / enclosed subspace of the medium cavity 1; if there is no gas inside, extract part of the medium appropriately without affecting the stability, and then extract part of the gas; to achieve a negative pressure state inside the enclosed space of the medium cavity 1, so that the platform is stably fixed on the riverbed / seabed.

[0068] For the floating operation, the present invention also proposes a method for reusing the construction platform, the construction method further comprising:

[0069] Step S6, extracting part of the medium in the enclosed space / enclosed subspace of the medium chamber 1, so that the platform is in a semi-submerged state and is overall stable;

[0070] Step S7, floating the platform to the next designated location by using the traction equipment;

[0071] Step S8, executing steps S3 to S4 to achieve the reuse of the temporary work platform for underwater construction.

[0072] The following describes a construction method of a temporary work platform in water using water as a medium, and utilizes the principle of negative pressure of gas in a confined space / confined subspace to further achieve the stability of the platform:

[0073] Step S1, prefabricate a temporary underwater construction work platform, and after prefabrication, push it horizontally onto the water through a traction device;

[0074] Step S2, injecting water into the enclosed space / enclosed subspace of the medium cavity 1 through the pipeline 3 to ensure that the platform is in a semi-submerged state and is overall stable, and floating the platform to a designated location through traction equipment;

[0075] Step S3, adjusting the traction equipment to accurately position the platform, and after positioning is completed, continuously injecting water into the enclosed space / enclosed subspace of the medium cavity 1 to make the lower outer wall of the sinking and floating platform 4 contact the riverbed / seabed;

[0076] Step S4, after the sinking is completed, further add some water into the enclosed space / enclosed subspace of the medium cavity 1, so that the temporary working platform for underwater bridge construction is stably fixed on the riverbed / seabed;

[0077] Step S5, extracting part of the gas in the enclosed space / enclosed subspace of the medium cavity 1; if there is no gas inside, extracting part of the water appropriately without affecting stability, and then extracting part of the gas; to achieve a negative pressure state inside the enclosed space of the medium cavity 1.

[0078] When the negative pressure construction method is adopted, the self-weight of the sinking and floating platform 4 and the pressure difference between the inside and outside of the sinking and floating platform 4 are used to penetrate into the riverbed / seabed to achieve stable fixation and higher stability.

[0079] In addition, for the riverbed / seabed at the sinking position, operators can clear the riverbed / seabed at the sinking position in advance to ensure the stability of the platform's final landing point.

[0080] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A temporary work platform for underwater construction, which can sink and float in water by changing its own gravity; characterized in that: The platform includes: The sinking and floating platform (4) has a hollow structure inside, forming a medium cavity (1); the medium cavity (1) forms a closed space that can be used to accommodate a medium; A base plate (2) is horizontally fixedly arranged on the top wall of the sinking and floating pedestal (4) and is used for carrying operating equipment; A plurality of through holes (101) of corresponding number and position are formed through the top wall of the base plate (2) and the sinking and floating pedestal (4); A plurality of pipes (3), the number of which is the same as the through holes (101), and are respectively inserted into the through holes (101); Each of the through holes (101) forms a group of medium exchange passages with a pipe (3) to achieve the exchange of the medium in the closed medium cavity (1) with the outside.

2. A temporary underwater construction work platform according to claim 1, characterized in that: The pipeline (3) and the base plate (2) form a contact profile due to the opening of the through hole (101); A sealing component matching the contact profile is arranged between the base plate (2) and each pipe (3).

3. A temporary underwater construction work platform according to claim 2, characterized in that: The sealing component is a waterproof sealing ring.

4. The temporary underwater construction work platform according to claim 1, characterized in that: The medium includes: water, or high-concentration salt water, or cement, or filler.

5. The temporary underwater construction work platform according to claim 1, characterized in that: The platform also includes: A plurality of partition plates (102) are vertically arranged in the medium cavity (1), and the partition plates (102) divide the closed space of the medium cavity (1) into a plurality of closed subspaces.

6. A temporary underwater construction work platform according to claim 5, characterized in that: Any of the enclosed subspaces is provided with a corresponding medium exchange passage to achieve the exchange of the medium in each enclosed subspace with the outside.

7. The temporary underwater construction work platform according to claim 5, characterized in that: Some of the enclosed subspaces are provided with corresponding medium exchange passages to achieve the exchange of the medium in the enclosed subspaces with the outside; Some of the enclosed subspaces are not provided with corresponding medium exchange passages and do not exchange medium with the outside.

8. A method for constructing a temporary underwater work platform, using the temporary underwater work platform as claimed in any one of claims 1 to 7, characterized in that: The method comprises: Step S1, prefabricate a temporary underwater construction work platform, and after prefabrication, push it horizontally onto the water through a traction device; Step S2, injecting medium into the enclosed space / enclosed subspace of the medium cavity (1) through the pipeline (3), ensuring that the platform is in a semi-submerged state and is overall stable, and floating the platform to a designated sinking position through a traction device; Step S3, adjusting the traction equipment to accurately position the platform, and after positioning is completed, continuously injecting the medium into the closed space / closed subspace of the medium cavity (1) until the platform is completely sunk; Step S4, after the sinking is completed, further add some medium into the closed space / closed subspace of the medium cavity (1), so that the temporary working platform for underwater bridge construction is stably fixed on the riverbed / seabed.

9. The construction method of a temporary working platform for underwater construction according to claim 8, characterized in that: Also includes: Step S5, extracting part of the gas in the closed space / closed subspace of the medium cavity (1); If there is no gas inside, a portion of the medium is appropriately extracted without affecting stability, and then a portion of the gas is extracted to achieve a negative pressure state inside the enclosed space of the medium cavity (1), so that the platform is stably fixed on the riverbed / seabed.

10. The construction method of a temporary working platform for underwater construction according to claim 8 or 9, characterized in that: Also includes: Step S6, extracting part of the medium in the enclosed space / enclosed subspace of the medium chamber (1), so that the platform is in a semi-submerged state and is overall stable; Step S7, floating the platform to the next designated location by using the traction equipment; Step S8, executing steps S3 to S4 to achieve the reuse of the temporary work platform for underwater construction.

Images