A semi-precast breast wall structure suitable for mediterranean coast caisson wharfs

Abstract

The utility model relates to gravity type caisson structure technical field discloses a half prefabricated breast wall structure suitable for mediterranean coastal caisson wharf, including L type prefabricated breast wall body and cast -in -situ breast wall, the L type prefabricated breast wall body includes bottom plate and side plate, is equipped with a plurality of bolt holes on the side plate, one side of the side plate with the bottom plate is fixedly connected, the bottom of side plate is equipped with lug, the lug, the bottom plate with the side plate integrated molding, the side plate with the bottom plate all are pre -buried with a plurality of steel bars, a plurality of steel bars with cast -in -situ breast wall fixed connection, the lug with the bottom plate all are connected with prefabricated concrete caisson. The utility model discloses a half prefabricated breast wall structure improves the bending -resistant and shearing capacity of component, effectively avoids most water operation link, simplifies the fender installation process, speeds up the whole project progress, saves the measure cost, effectively promotes the construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gravity caisson structure technology, and in particular to a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast. Background Technology

[0002] Gravity caisson structures, as a classic and mature form of wharf and breakwater structure, are widely used in port and coastal engineering due to their advantages such as high overall rigidity, good durability, and strong adaptability to foundations. This structure mainly relies on the weight of the caisson itself and the gravity generated by its internal filling material to resist external loads such as waves and currents, thereby ensuring the overall stability and anti-overturning and anti-slip performance of the structure. In traditional construction techniques, the breast wall, as a key component connecting the superstructure and the caisson foundation, is usually constructed using on-site casting. However, in practice, especially in underwater operating environments, this construction method has revealed several significant technical and economic shortcomings.

[0003] Firstly, when the breast wall design includes cantilever sections, traditional methods require the construction of complex cantilever support platforms on water. The construction of such platforms not only demands high-quality materials and equipment, increasing the cost of temporary measures, but also results in a long construction period during erection and dismantling, significantly impacting the overall project schedule and leading to low construction efficiency.

[0004] Secondly, tides, as a typical natural phenomenon in coastal and nearshore areas, severely restrict the window of opportunity for underwater construction. Changes in tidal levels cause continuous fluctuations in the elevation of the work surface, affecting not only the accuracy and continuity of formwork installation, rebar tying, and concrete pouring, but also posing a potential threat to the safety of construction personnel and equipment. With limited resources such as ships, hoisting equipment, and manpower, traditional cast-in-place methods often suffer from significantly shortened effective working time due to tidal influences, increasing the difficulty of construction organization and ultimately leading to project delays and cost increases.

[0005] Furthermore, on-site casting operations face a series of challenges, including difficulties in ensuring a continuous concrete supply, poor underwater curing conditions, and significant challenges in quality control. Especially under harsh sea conditions, construction safety risks are further amplified, increasing the risk of accidents. These factors collectively limit the overall efficiency of traditional gravity-type caisson breast wall construction, necessitating the exploration of more efficient, safe, and economical construction solutions.

[0006] Therefore, a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast, aiming to solve or improve at least one of the aforementioned technical problems.

[0008] To achieve the above objectives, the present invention provides the following solution: The present invention provides a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast, comprising an L-shaped prefabricated breast wall body and a cast-in-place breast wall. The L-shaped prefabricated breast wall body includes a bottom plate and a side plate. The side plate has several bolt holes. The side plate is fixedly connected to one side of the bottom plate. The bottom of the side plate has a protrusion. The protrusion, the bottom plate, and the side plate are integrally formed. Several reinforcing bars are pre-embedded in both the side plate and the bottom plate, and these reinforcing bars are fixedly connected to the cast-in-place breast wall; both the protrusion and the bottom plate are connected to the precast concrete caisson.

[0009] According to the present invention, a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast is provided, wherein fastening bolts are installed in the bolt holes, and the side plate is fixedly connected to the fender by a plurality of the fastening bolts.

[0010] According to the present invention, a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast is provided, wherein the length of the L-shaped prefabricated breast wall body is twice the height of the L-shaped prefabricated breast wall body.

[0011] According to the present invention, a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast is provided, wherein the length of the reinforcing bars extending out of the side plate and the bottom plate is 160mm to 240mm.

[0012] According to the present invention, a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast is provided, wherein several bolt holes are arranged at equal intervals.

[0013] According to the present invention, a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast is provided, wherein several of the aforementioned steel bars are arranged at equal intervals.

[0014] The present invention discloses the following technical effects: This utility model combines an L-shaped precast breast wall body with a cast-in-place breast wall to form a semi-precast breast wall structure. The L-shaped precast breast wall body is prefabricated in an onshore prefabrication yard and then transported to the site. It is then precisely installed on the top front edge of the precast concrete caisson at a predetermined position using large lifting equipment. It is effectively connected to the cast-in-place breast wall with several steel bars to form a complete breast wall that works together to bear the load. The semi-precast method has high design flexibility, and the ratio and structural form of the precast and cast-in-place breast walls can be adjusted according to the actual project requirements, effectively avoiding most of the water-based operations. The L-shaped prefabricated breast wall body of this utility model is located in the water-adjacent cantilever section. By prefabricating the L-shaped prefabricated breast wall body of the water-adjacent cantilever section, which has the most stress and the most unfavorable construction conditions and is complex in shape, in a factory, a large number of processes are transferred to the more convenient land-based prefabrication yard. This not only significantly improves the controllability of construction quality, but also greatly shortens the on-site operation time and reduces the dependence on natural conditions such as tides, thereby accelerating the overall progress of the project, saving on the cost of measures, effectively improving construction efficiency, and enhancing the overall economic benefits of the project. In-depth research and promotion of the semi-prefabricated breast wall structure type is of great significance for promoting the technological progress and construction mode innovation of port engineering. The L-shaped precast breast wall body of this utility model is produced in a factory environment, and its concrete mix ratio, pouring, vibration and curing conditions are strictly controlled, which effectively avoids the segregation and bleeding problems that are prone to occur in cast-in-place concrete on water. The strength, durability and appearance quality of the components are fundamentally guaranteed. It basically avoids the risk sources of setting up complex support platforms on water and carrying out high-risk operations affected by tides, simplifies the construction process, reduces the dependence on large and special water construction equipment, and thus significantly reduces safety risks and temporary measures costs.

[0015] The protrusion at the front end of the L-shaped precast breast wall body of this utility model forms a toe reinforcing rib, which can effectively resist the root bending moment and shear force generated by the cantilever structure under the wharf service load (such as mooring force and berthing impact force) and wave action, thereby improving the bending and shear bearing capacity of the component; several steel bars are pre-embedded in the side plate and the bottom plate, and these steel bars are fixedly connected to the cast-in-place breast wall to form a reliable steel bar connection section. After installation, the steel bars will be completely anchored in the cast-in-place breast wall, ensuring strong shear force transmission and bending moment continuity between the precast part and the cast-in-place part, and realizing the collaborative work of the two. This utility model has several bolt holes on its side plate. The corresponding bolt installation holes are precisely reserved during prefabrication. During on-site installation, the bolts for fixing the fender can be directly inserted into the pre-embedded holes and anchored. This avoids the cumbersome process of drilling and rebar installation required in traditional cast-in-place breast walls. It not only protects the integrity of the concrete, but also greatly simplifies the fender installation process, shortens the installation period of the dock surface equipment, and further improves construction efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the installation of the present invention and the precast concrete caisson; Figure 2 This is a schematic diagram of the structure of the L-shaped prefabricated breast wall body in this utility model.

[0018] Among them, 1. L-shaped precast breast wall body; 11. bottom plate; 12. side plate; 13. bolt holes; 14. protrusions; 15. reinforcing bars; 2. cast-in-place breast wall; 3. precast concrete caisson; 4. fender. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-2 This utility model provides a semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast, including an L-shaped prefabricated breast wall body 1 and a cast-in-place breast wall 2. The L-shaped prefabricated breast wall body 1 includes a bottom plate 11 and a side plate 12. The side plate 12 is provided with a plurality of bolt holes 13. The side plate 12 is fixedly connected to one side of the bottom plate 11. The bottom of the side plate 12 is provided with a protrusion 14. The protrusion 14, the bottom plate 11 and the side plate 12 are integrally formed. Several steel bars 15 are pre-embedded on the side plate 12 and the bottom plate 11, and the steel bars 15 are fixedly connected to the cast-in-place breast wall 2; the protrusion 14 and the bottom plate 11 are both connected to the precast concrete caisson 3. With this configuration, the present invention combines an L-shaped prefabricated breast wall body 1 and a cast-in-place breast wall 2 to form a semi-prefabricated breast wall structure. The L-shaped prefabricated breast wall body 1 is prefabricated in a prefabrication yard on land and then transported to the site for precise installation at the predetermined position on the top front edge of the prefabricated concrete caisson 3 using large lifting equipment. It is effectively connected to the cast-in-place breast wall 2 by several steel bars 15 to form a complete breast wall that works together to bear the load. The semi-prefabricated method has a high degree of design flexibility, and the ratio and structural form of the prefabricated and cast-in-place breast wall 2 can be adjusted according to the actual project requirements, effectively avoiding most of the water-based operation links. The L-shaped prefabricated breast wall body 1 of this utility model is located in the water-adjacent cantilever section. By prefabricating the L-shaped prefabricated breast wall body 1, which is the most stress-bearing and has the most unfavorable construction conditions and is complex in shape, in a factory, a large number of processes are transferred to the more convenient land-based prefabrication yard. This not only significantly improves the controllability of construction quality, but also greatly shortens the on-site operation time and reduces the dependence on natural conditions such as tides, thereby accelerating the overall progress of the project, saving on the cost of measures, effectively improving construction efficiency, and enhancing the overall economic benefits of the project. In-depth research and promotion of the semi-prefabricated breast wall structure type is of great significance for promoting the technological progress and construction mode innovation of port engineering. The L-shaped precast breast wall body 1 of this utility model is produced in a factory environment. The concrete mix ratio, pouring, vibration and curing conditions are strictly controlled, which effectively avoids the segregation and bleeding problems that are prone to occur in cast-in-place concrete on water. The strength, durability and appearance quality of the components are fundamentally guaranteed. It basically avoids the risk sources of setting up complex support platforms on water and carrying out high-risk operations affected by tides, simplifies the construction process, reduces the dependence on large and special water construction equipment, and thus significantly reduces safety risks and temporary measures costs.

[0022] The protrusion 14 at the front end of the L-shaped precast breast wall body 1 of this utility model constitutes a toe reinforcing rib, which can effectively resist the root bending moment and shear force generated by the cantilever structure under the wharf service load (such as mooring force, berthing impact force) and wave action, thereby improving the bending and shear bearing capacity of the component; several steel bars 15 are pre-embedded on the side plate 12 and the bottom plate 11, and the steel bars 15 are fixedly connected to the cast-in-place breast wall 2 to form a reliable steel bar connection section. After installation, the steel bars 15 will be completely anchored in the cast-in-place breast wall 2, ensuring strong shear force transmission and bending moment continuity between the precast part and the cast-in-place part, and realizing the collaborative work of the two. The side plate 12 of this utility model has several bolt holes 13. The corresponding bolt installation holes are precisely reserved during prefabrication. During on-site installation, the bolts for fixing the fender can be directly inserted into the pre-embedded holes and anchored. This avoids the cumbersome process of drilling and rebar installation required in the traditional cast-in-place breast wall 2. It not only protects the integrity of the concrete, but also greatly simplifies the fender installation process, shortens the installation period of the dock surface equipment, and further improves construction efficiency.

[0023] The design has been further optimized. Fastening bolts are installed in the bolt holes 13, and the side plate 12 is fixedly connected to the fender 4 by several fastening bolts.

[0024] The design was further optimized so that the length of the L-shaped prefabricated breast wall body 1 is twice the height of the L-shaped prefabricated breast wall body 1. The length-to-height ratio of the L-shaped precast breast wall body 1 is 1:2. This optimized ratio ensures good stability of the component during installation and under final stress, avoiding instability due to excessive slenderness and height, or affecting its structural efficiency as a cantilever beam due to excessive width and flatness.

[0025] The length of the L-shaped prefabricated breast wall body 1 can be modularly determined according to the width of the fender selected in the wharf design. At the locations where the fender needs to be installed, corresponding bolt holes are precisely pre-drilled during prefabrication. These holes can be formed in the prefabrication yard using methods such as pre-embedded sleeves to ensure accurate positioning and smooth inner walls. During on-site installation, the bolts for fixing the fender can be directly inserted into the pre-embedded holes and anchored.

[0026] This design completely avoids the cumbersome procedures of drilling and rebar installation required for traditional cast-in-place breast walls. It not only protects the integrity of the concrete but also greatly simplifies the fender installation process and shortens the installation period of the dock surface equipment.

[0027] In a further optimized design, the length of the reinforcing bars 15 extending beyond the side plate 12 and bottom plate 11 is 160mm to 240mm; in this embodiment, it is preferably 200mm, forming a reliable reinforcing bar connection segment. These exposed reinforcing bars 15 will be completely anchored in the cast-in-place breast wall 2 after installation, ensuring strong shear force transfer and bending moment continuity between the precast and cast-in-place parts, which is the key to enabling the two to work together.

[0028] Precise control of the exposed rebar 15 length (approximately 200mm) ensures sufficient anchorage length while preventing collisions and bending during hoisting, transportation, and installation due to excessive rebar 15 length, thus improving construction accuracy and efficiency.

[0029] The design was further optimized, with several bolt holes 13 arranged at equal intervals.

[0030] The design was further optimized by arranging several steel bars at equal intervals of 15.

[0031] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A semi-prefabricated breast wall structure suitable for caisson wharves along the Mediterranean coast, characterized in that: The system includes an L-shaped precast breast wall body (1) and a cast-in-place breast wall (2). The L-shaped precast breast wall body (1) includes a base plate (11) and a side plate (12). The side plate (12) has several bolt holes (13). The side plate (12) is fixedly connected to one side of the base plate (11). The bottom of the side plate (12) is provided with a protrusion (14). The protrusion (14), the base plate (11) and the side plate (12) are integrally formed. Several steel bars (15) are pre-embedded on the side plate (12) and the bottom plate (11), and the steel bars (15) are fixedly connected to the cast-in-place breast wall (2); the protrusion (14) and the bottom plate (11) are connected to the precast concrete caisson (3).

2. The semi-prefabricated breast wall structure for caisson wharves along the Mediterranean coast according to claim 1, characterized in that: The bolt hole (13) is fitted with a fastening bolt, and the side plate (12) is fixedly connected to the fender (4) by a number of the fastening bolts.

3. The semi-prefabricated breast wall structure for caisson wharves along the Mediterranean coast according to claim 1, characterized in that: The length of the L-shaped prefabricated breast wall body (1) is twice the height of the L-shaped prefabricated breast wall body (1).

4. The semi-prefabricated breast wall structure for caisson wharves along the Mediterranean coast according to claim 1, characterized in that: The length of the reinforcing bar (15) extending out of the side plate (12) and the bottom plate (11) is 160mm to 240mm.

5. The semi-prefabricated breast wall structure for caisson wharves along the Mediterranean coast according to claim 1, characterized in that: Several bolt holes (13) are arranged at equal intervals.

6. The semi-prefabricated breast wall structure for caisson wharves along the Mediterranean coast according to claim 1, characterized in that: Several of the aforementioned steel bars (15) are arranged at equal intervals.

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