Cantilever breast wall structure, forming method and wharf berth system

Abstract

The invention relates to the technical field of wharf building construction, and provides a cantilever breast wall structure, a forming method and a wharf berth system.The cantilever breast wall structure comprises a prefabricated supporting structure, and the top face elevation of the prefabricated supporting structure is larger than or equal to the local minimum tide height; and the post-pouring wall body structure is connected to the top surface of the prefabricated supporting structure. The technical problems that in the prior art, an on-site formwork erecting and pouring mode is adopted for constructing the cantilever breast wall structure, a formwork and the cantilever breast wall structure are prone to deformation and quality defects under tide scouring, the construction difficulty is large, the construction cost is high, and the construction quality is difficult to guarantee can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of dock building structures, and in particular to a cantilever breast wall structure, a forming method and a dock berth system. Background Art

[0002] Sometimes it is necessary to set up a cantilever breast wall structure made of concrete on the side of the dock facing the water. The side of the cantilever breast wall structure is connected to the side wall of the dock caisson, and the bottom is suspended in the air. Therefore, cantilever construction needs to be carried out on the water side of the dock during construction; however, cantilever construction requires on-site formwork and pouring at the cantilever breast wall structure, which requires an extremely low water level. If the local tidal water level is too high, on-site formwork and pouring are required under the scouring conditions of the tide. Not only is the construction extremely difficult, but it is also prone to technical problems such as formwork deformation, formwork collapse, root rot of the cantilever breast wall structure, and honeycombed surface of the cantilever breast wall structure. It takes a lot of time and cost to repair the formwork and the cantilever breast wall structure. Therefore, it is urgent to develop a new type of cantilever breast wall structure and construction process. Summary of the invention

[0003] The purpose of the present invention is to overcome the technical problems in the prior art of constructing a cantilever breast wall structure by on-site formwork and pouring, the formwork and the cantilever breast wall structure are easily deformed and have quality defects due to tidal scouring, the construction is difficult, the construction cost is high and it is difficult to ensure the construction quality, and provide a cantilever breast wall structure, a forming method and a dock berth system.

[0004] In a first aspect, the present invention provides a cantilever breast wall structure, comprising:

[0005] Prefabricated support structure: the top elevation of the prefabricated support structure is greater than or equal to the lowest tide height of the local area;

[0006] Post-cast wall structure, the post-cast wall structure is connected to the top surface of the prefabricated supporting structure.

[0007] This scheme divides the cantilever breast wall structure into a precast supporting structure and a post-cast wall structure along the height direction. The precast supporting structure is a prefabricated process. During installation, the precast supporting structure can be hoisted into place and connected to the side wall of the wharf caisson. There is no need for on-site formwork and cast-in-place under tidal scouring conditions, which can greatly reduce the workload of cantilever construction and avoid losses caused by deformation or even collapse of the formwork due to tidal scouring. The post-cast wall structure is arranged on the top surface of the precast supporting structure. Since the top surface elevation of the precast supporting structure is greater than or equal to the local lowest tide height, there is a period when the top surface of the precast supporting structure is not flooded by the water surface. Formwork and cast-in-place of the post-cast wall structure are carried out during these periods, which can greatly reduce the difficulty of on-site formwork and pouring operations, and avoid losses caused by deformation or even collapse of the formwork due to tidal scouring, as well as quality defects such as root rot and honeycombed surface caused by tidal scouring and erosion of the post-cast wall structure and corresponding repair costs.

[0008] Preferably, it also includes an inverted hanging bracket, one end of which is connected to the inside of the prefabricated supporting structure, and the other end of the inverted hanging bracket is provided with a hook, which is used to be clamped on the side wall of the dock caisson.

[0009] This solution connects the counter-hanging bracket in the prefabricated support structure, which is beneficial for quickly positioning the prefabricated support structure on the side wall of the wharf caisson during construction, and is also beneficial for improving the connection reliability between the prefabricated support structure and the wharf caisson.

[0010] Preferably, at least a portion of the counter-hanging bracket is located inside the post-cast wall structure.

[0011] This solution places a part of the inverted bracket inside the post-cast wall. On the one hand, the post-cast wall can protect the inverted bracket to prevent the inverted bracket from being washed and eroded by the tide during the operation stage; on the other hand, the inverted bracket can also serve as the internal skeleton of the post-cast wall, thereby improving the strength and service life of the post-cast wall.

[0012] Preferably, at least two counter-hanging brackets are arranged at intervals along the length direction of the prefabricated supporting structure.

[0013] This solution can further improve the connection reliability between the prefabricated supporting structure and the wharf caisson.

[0014] Preferably, the prefabricated support structure comprises at least two sections, and the sections are spaced apart along the length direction of the prefabricated support structure.

[0015] This solution divides the prefabricated support structure into multiple segments with smaller size and mass, which can reduce the difficulty of transportation and hoisting of the prefabricated support structure and is conducive to improving the construction speed of the prefabricated support structure.

[0016] Preferably, a post-cast connecting strip is provided between two adjacent segments, and both sides of the post-cast connecting strip are respectively connected to the segments on the corresponding sides.

[0017] This solution sets a post-cast connecting strip between two adjacent sections, which can tightly connect the two adjacent sections, thereby ensuring the integrity and stability of the prefabricated supporting structure.

[0018] Preferably, a fender positioning structure is provided on the side of the post-cast wall structure facing the water, and the fender positioning structure is used to connect the fender.

[0019] Since the post-cast wall structure is formed by on-site formwork and casting, this solution sets the fender positioning structure on the post-cast wall structure, which is conducive to adjusting the position of the fender positioning structure on-site, thereby ensuring the accurate installation position of the fender.

[0020] In a second aspect, the present invention provides a method for forming a cantilever breast wall, which is applied to a cantilever breast wall structure of the present invention, and comprises the following steps:

[0021] S1. manufacturing a prefabricated support structure, and connecting the prefabricated support structure to the side wall of the wharf caisson;

[0022] S2. Construct the post-cast wall structure on the top surface of the prefabricated support structure.

[0023] This scheme divides the cantilever breast wall structure into a prefabricated supporting structure and a post-cast wall structure along the height direction. The prefabricated supporting structure with a lower elevation that will be subject to tidal scouring and erosion adopts a prefabricated process, while the post-cast wall structure with a higher elevation that can be exposed above the water surface adopts on-site formwork and casting, which can greatly reduce the construction difficulty of the cantilever breast wall structure and avoid quality defects such as root rot and honeycombed surface.

[0024] Preferably, in step S2, the post-cast wall structure is constructed in layers along the height direction.

[0025] This scheme casts the post-cast wall structure in layers, which can reduce the volume of concrete poured in each casting operation, reduce the demand for construction equipment and personnel, and help improve the heat dissipation effect of each layer of concrete, avoid cracks in the concrete structure due to heat accumulation, and thus ensure the construction quality of the post-cast wall structure.

[0026] In a third aspect, the present invention provides a dock berth system, including a dock caisson, wherein a cantilever breast wall structure of the present invention is connected to a side of the dock caisson facing the water.

[0027] The wharf berth system of this scheme adopts a cantilever breast wall structure of the present invention on the water side of the wharf caisson, which can reduce the amount of cantilever construction work during construction and avoid quality defects such as root rot, honeycombed surface and so on of the cantilever breast wall structure due to scouring and erosion of tides.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention provides a cantilever breast wall structure, which is divided into a prefabricated support structure and a post-cast wall structure along the height direction, wherein the prefabricated support structure is a prefabricated process, and the post-cast wall structure is arranged on the top surface of the prefabricated support structure. Since the top surface elevation of the prefabricated support structure is greater than or equal to the local lowest tide height, there is a period when the top surface of the prefabricated support structure is not flooded by the water surface. During these periods, the formwork and cast-in-place of the post-cast wall structure are carried out, which can greatly reduce the difficulty of on-site formwork and casting operations, and avoid the losses caused by deformation or even collapse of the formwork due to tidal scouring, as well as quality defects such as root rot, honeycombed surface and corresponding repair costs of the post-cast wall structure due to tidal scouring and erosion.

[0030] 2. The present invention provides a forming method for a cantilever breast wall, which divides the cantilever breast wall structure into a prefabricated supporting structure and a post-cast wall structure along the height direction, wherein the prefabricated supporting structure with a lower elevation that will be subjected to tidal scouring and erosion adopts a prefabricated process, while the post-cast wall structure with a higher elevation that can be exposed above the water surface adopts on-site formwork and casting, which can greatly reduce the construction difficulty of the cantilever breast wall structure and avoid quality defects such as root rot, honeycombed surface, etc.

[0031] 3. The present invention provides a dock berth system, which adopts a cantilever breast wall structure of the present invention on the water side of the dock caisson, which can reduce the amount of cantilever construction work during construction and avoid quality defects such as root rot, honeycombed surface, etc. of the cantilever breast wall structure due to scouring and erosion of tides. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a side cross-sectional structural schematic diagram of a cantilever breast wall structure of the present invention;

[0033] Figure 2 It is a side structural schematic diagram of a cantilever breast wall structure of the present invention when the wall formwork is installed;

[0034] Figure 3 It is a front view structural schematic diagram of a cantilever breast wall structure of the present invention;

[0035] Figure 4 It is a schematic front view of the segmented structure of a cantilever breast wall structure of the present invention;

[0036] Figure 5 It is a partial top view structural schematic diagram of a dock berth system of the present invention;

[0037] Figure 6 It is a partially enlarged top view structural schematic diagram of a dock berth system of the present invention at a prefabricated support structure;

[0038] Icons: 1-prefabricated supporting structure; 11-segment; 12-post-cast connecting strip; 2-post-cast wall structure; 3-reverse hanging bracket; 31-hook; 32-longitudinal beam; 33-inclined support; 34-connecting beam; 4-fender positioning structure; 5-dock caisson; 61-table nut; 62-tension screw; 63-wall formwork. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0040] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0042] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0043] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0044] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0045] Example 1

[0046] like Figures 1 to 4 As shown, a cantilever breast wall structure includes a prefabricated support structure 1 and a post-cast wall structure 2. The top surface elevation of the prefabricated support structure 1 is greater than or equal to the local lowest tide height; the post-cast wall structure 2 is connected to the top surface of the prefabricated support structure 1.

[0047] exist Figures 1 to 6 In the figure, arrows X and Y represent two directions parallel to the horizontal plane and perpendicular to each other, wherein arrow X is parallel to the length direction of the prefabricated support structure 1; arrow Z represents the height direction.

[0048] In the above embodiment, the top surface elevation of the prefabricated support structure 1 is greater than or equal to the local lowest tide height. For example, if the local tidal water level is +0.5m to +3.5m, the local lowest tide height is +0.5m, and the top surface elevation of the prefabricated support structure 1 is greater than or equal to +0.5m, so that the top surface of the prefabricated support structure 1 can be exposed above the water surface at least under the lowest tide height, which is convenient for the construction of the post-cast wall structure 2.

[0049] In the above embodiment, the top surface elevation of the prefabricated support structure 1 can be further made greater than or equal to the sum of the local minimum tide height and the reserved settlement amount; for example, when the minimum tide height is +0.5m and the reserved settlement amount is 5cm, the top surface elevation of the prefabricated support structure 1 can be made greater than or equal to +0.55m.

[0050] In an optional embodiment, an inverted support 3 is further included, one end of which is connected to the inside of the prefabricated support structure 1, and the other end of which is provided with a hook 31, which is used to be clamped on the side wall of the wharf caisson 5. Figure 1As shown, the inverted hanging bracket 3 includes a longitudinal beam 32 arranged along the height direction, the bottom of the longitudinal beam 32 is buried inside the prefabricated supporting structure 1, and a hook 31 is arranged on the top of the longitudinal beam 32, and the width of the hook 31 is greater than or equal to the thickness of the side wall of the dock caisson 5, so that it can be hooked on the side wall of the dock caisson 5.

[0051] In an optional embodiment, at least a portion of the inverted support 3 is located inside the post-cast wall structure 2, for example Figure 1 As shown, the middle part of the inverted support 3 is located inside the post-cast wall structure 2 .

[0052] In an optional embodiment, at least two counter-hanging brackets 3 are arranged at intervals along the length direction of the prefabricated support structure 1, and the number of the counter-hanging brackets 3 is determined according to the weight of the prefabricated support structure 1 and the strength of the counter-hanging brackets 3. It should be noted that the length direction of the prefabricated support structure 1 refers to the direction parallel to the side wall of the wharf caisson 5 and perpendicular to the height direction, for example Figure 4 The arrow X in the middle points to the direction.

[0053] In an optional embodiment, connection holes may be reserved on the hook 31 for installing threaded connectors, so that the hook 31 can be further fixed to the side wall of the dock caisson 5 through the threaded connectors to lock the relative positions of the prefabricated support structure 1 and the dock caisson 5.

[0054] In an optional embodiment, the inverted support 3 is formed by splicing steel sections, such as I-beams, channel steels, and double-jointed channel steels, so as to ensure that the inverted support 3 has sufficient strength and rigidity.

[0055] In an optional embodiment, the side of the inverted support 3 facing the water side of the prefabricated support structure 1, that is, the side of the inverted support 3 facing away from the wharf caisson 5, is also connected to an inclined support 33; for example Figure 1 As shown, one end of the oblique support 33 is connected to the upper end of the longitudinal beam 32, and the other end of the oblique support 33 is connected to the lower end of the longitudinal beam 32 through the connecting beam 34. The angles between the oblique support 33 and the longitudinal beam 32, between the oblique support 33 and the connecting beam 34, and between the connecting beam 34 and the longitudinal beam 32 are all greater than zero, thereby forming a triangular structure, which can not only ensure the reliability of the connection between the inverted support 3 and the prefabricated support structure 1, but also ensure that the inverted support 3 has sufficient strength and rigidity.

[0056] In an optional implementation manner, a concrete protective layer is provided on the surface of the inverted bracket 3 to ensure the durability of the inverted bracket 3 .

[0057] In an optional embodiment, if Figure 3 and Figure 6 As shown, the prefabricated support structure 1 comprises at least two sections 11, and the sections 11 are spaced apart along the length direction of the prefabricated support structure 1. The specific size of the sections 11 is determined according to the transport capacity and the lifting capacity.

[0058] In an optional embodiment, a post-cast connecting strip 12 is provided between two adjacent segments 11 , and both sides of the post-cast connecting strip 12 are respectively connected to the segments 11 on the corresponding sides.

[0059] In an optional embodiment, a platform-shaped nut 61 may be pre-embedded in the prefabricated supporting structure 1 to facilitate connection with the wall formwork 63 of the post-cast wall structure 2 .

[0060] In an optional embodiment, a fender positioning structure 4 is provided on the water-facing side of the post-cast wall structure 2. The fender positioning structure 4 is used to connect the fender, and its specific structure can match the fender, such as pre-embedded connecting holes, pre-embedded connecting pins, and pre-embedded connecting plates.

[0061] Example 2

[0062] A method for forming a cantilever breast wall, applied to a cantilever breast wall structure in Example 1, comprises the following steps:

[0063] S1, supporting the formwork and casting the prefabricated support structure 1, maintaining the prefabricated support structure 1 until its strength reaches at least 75% of the design strength, transporting and hoisting the prefabricated support structure 1 to the designated position of the side wall of the wharf caisson 5, and connecting it to the side wall of the wharf caisson 5, the connection methods include but are not limited to embedded screw connection, sleeve grouting connection, reserved hole grout anchor overlap, mortise and tenon connection, hook connection;

[0064] If the prefabricated support structure 1 comprises a segment 11, step S1 further comprises the following steps:

[0065] The formwork of the post-cast connecting strip 12 is connected between two adjacent segments 11, and concrete is poured to form the post-cast connecting strip 12 and connect the segments 11 into a whole; then the surface of the post-cast connecting strip 12 is roughened and cured until its strength reaches at least 75% of the design strength before the construction of the post-cast wall structure 2 can be carried out.

[0066] S2. Connect the wall formwork 63 of the post-cast wall structure 2 to the prefabricated support structure 1, for example, connect the wall formwork 63 to the upper side of the prefabricated support structure 1 through a pre-embedded threaded connector; a tensioning screw 62 can be connected between the formwork and the wharf caisson 5 to further fix the wall formwork 63, and at least two groups of tensioning screws 62 can be set along the height direction; a tripod can be additionally set at the bottom of the wall formwork 63 for support; a working platform can be set at the top of the wall formwork 63 to provide a space for construction workers to move around; then pour concrete in the wall formwork 63, and complete the construction of the post-cast wall structure 2;

[0067] If the post-cast wall structure 2 also includes a fender positioning structure 4, then before casting the post-cast wall structure 2 in this step, it is also necessary to install and fix the fender positioning structure 4 and confirm that its position is accurate.

[0068] In an optional implementation manner, in step S2, the post-cast wall structure 2 is constructed in layers along the height direction.

[0069] In an optional embodiment, after step S2, when pouring a concrete cushion to cap the dock caisson 5, the concrete cushion can wrap and embed the hook 31, thereby further ensuring the reliability of the connection between the cantilever breast wall structure and the dock caisson 5, and protecting the hook 31 structure from erosion by the external environment.

[0070] Example 3

[0071] like Figures 5 and 6 As shown, a dock berth system includes a dock caisson 5, and a cantilever breast wall structure in Example 1 is connected to the side of the dock caisson 5 facing the water.

[0072] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cantilever breast wall structure, characterized in that: include: A prefabricated support structure (1), wherein the top surface elevation of the prefabricated support structure (1) is greater than or equal to the local lowest tide height; A post-cast wall structure (2), wherein the post-cast wall structure (2) is connected to the top surface of the prefabricated support structure (1).

2. The cantilever breast wall structure according to claim 1, characterized in that: It also comprises an inverted hanging bracket (3), one end of which is connected to the inside of the prefabricated supporting structure (1), and the other end of which is provided with a hook (31), and the hook (31) is used to be clamped on the side wall of the wharf caisson (5).

3. The cantilever breast wall structure according to claim 2, characterized in that: At least a portion of the counter-hanging bracket (3) is located inside the post-cast wall structure (2).

4. The cantilever breast wall structure according to claim 2, characterized in that: At least two of the counter-hanging brackets (3) are arranged at intervals along the length direction of the prefabricated support structure (1).

5. A cantilever breast wall structure according to any one of claims 1 to 4, characterized in that: The prefabricated support structure (1) comprises at least two sections (11), and the sections (11) are spaced apart along the length direction of the prefabricated support structure (1).

6. The cantilever breast wall structure according to claim 5, characterized in that: A post-cast connecting strip (12) is provided between two adjacent segments (11), and both sides of the post-cast connecting strip (12) are respectively connected to the segments (11) on the corresponding sides.

7. A cantilever breast wall structure according to any one of claims 1 to 4, characterized in that: A fender positioning structure (4) is provided on the side of the post-cast wall structure (2) facing the water, and the fender positioning structure (4) is used to connect the fender.

8. A method for forming a cantilever breast wall, characterized in that: A cantilever breast wall structure as claimed in any one of claims 1 to 7, comprising the following steps: S1, manufacturing a prefabricated support structure (1), and connecting the prefabricated support structure (1) to the side wall of the wharf caisson (5); S2. constructing a post-cast wall structure (2) on the top surface of the prefabricated support structure (1).

9. The method for forming a cantilever breast wall according to claim 8, characterized in that: In step S2, the post-cast wall structure (2) is constructed in layers along the height direction.

10. A dock berth system, comprising a dock caisson (5), characterized in that: The side of the wharf caisson (5) facing the water is connected to a cantilever breast wall structure as described in any one of claims 1 to 7.

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