A large prefabricated assembled caisson

Abstract

This utility model discloses a large prefabricated assembled caisson, comprising multiple prefabricated units. Each prefabricated unit includes a prefabricated body, with an upper connecting steel plate and a lower connecting steel plate at both ends along a first direction. The upper connecting steel plate includes an upper connecting portion connected to the outer periphery of the top of the prefabricated body and an upper extension portion extending beyond the top. The lower connecting steel plate includes a lower connecting portion connected to the outer periphery of the bottom of the prefabricated body and a lower extension portion extending beyond the bottom. Along the first direction, multiple supporting members are provided at the top or bottom of the prefabricated body, and the length of each supporting member is equal to the sum of the lengths of the upper extension portion and the lower extension portion. This assembled caisson shortens the construction cycle and accelerates the industrialization and prefabrication process of bridge construction. It has a smaller impact on the site environment and improves the overall strength of the assembled structure.

Description

Technical Field

[0001] This utility model relates to the field of caisson construction technology, and in particular to a large prefabricated assembled caisson. Background Technology

[0002] Traditional caisson construction often employs cast-in-place concrete, which presents challenges such as long construction periods, difficulty in quality control, significant environmental impact, labor-intensive processes, and high construction risks. Existing prefabricated structures are mostly designed for small structures, employing simple assembly methods, but their strength and precision are relatively low, thus affecting the overall structural performance of the assembled prefabricated blocks. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a large prefabricated assembled caisson, which shortens the construction cycle and accelerates the industrialization and prefabrication process of bridge construction. It has minimal impact on the site environment and improves the overall strength of the assembled structure.

[0004] According to an embodiment of the present utility model, a large prefabricated assembled caisson includes multiple prefabricated units. Each prefabricated unit includes a prefabricated body. The prefabricated body has an upper connecting steel plate and a lower connecting steel plate at both ends along a first direction. The upper connecting steel plate includes an upper connecting portion connected to the outer periphery of the top of the prefabricated body and an upper extension portion extending out of the top. The lower connecting steel plate includes a lower connecting portion connected to the outer periphery of the bottom of the prefabricated body and a lower extension portion extending out of the bottom.

[0005] Along the first direction, the top or bottom of the prefabricated body is provided with a plurality of support members, and the length of the support member is equal to the sum of the length of the upper extension and the length of the lower extension.

[0006] According to this utility model, a large prefabricated assembled caisson is constructed by setting up prefabricated units including upper and lower connecting steel plates, allowing two adjacent prefabricated units to be connected via these plates. The upper connecting part increases the connection strength between the upper connecting steel plate and the prefabricated body, while the lower connecting part increases the connection strength between the lower connecting steel plate and the prefabricated body. Multiple support members are provided at the top or bottom of the prefabricated body to stably support it between adjacent prefabricated bodies. Along a first direction, the length of the support member is equal to the sum of the lengths of the upper and lower extensions, ensuring that when two adjacent prefabricated bodies are supported by the support members, the lower extension of the upper prefabricated unit contacts the upper extension of the lower prefabricated unit, facilitating connection. Adjacent prefabricated bodies can also be connected by filling with a connecting material. Compared to the traditional cast-in-place cement caisson method, this shortens the construction period, has less impact on the site environment, and improves the overall strength of the assembled structure compared to simple assembly for small structures.

[0007] According to some embodiments of the present invention, along the first direction, an accommodating space is formed between two adjacent precast bodies, and the accommodating space is filled with first concrete.

[0008] According to some embodiments of the present invention, the prefabricated body is provided with a plurality of spaced through holes, which extend along the first direction.

[0009] According to some embodiments of this utility model, the upper connecting steel plate and the lower connecting steel plate are respectively provided with multiple shear members on the side facing the prefabricated body.

[0010] According to some embodiments of this utility model, the upper connecting steel plate and the lower connecting steel plate are respectively provided with slurry discharge pipes, and the slurry discharge pipes are connected to the accommodating space and the external environment.

[0011] According to some embodiments of the present invention, the prefabricated body is pre-embedded with a plurality of spaced first pre-embedded parts, the first pre-embedded parts extending along the first direction, and the two ends extending out of the top and bottom of the prefabricated body respectively.

[0012] Along the first direction, the projected lengths of the upper connecting steel plate and the lower connecting steel plate on the first embedded part are both greater than or equal to 20cm.

[0013] According to some embodiments of the present invention, the prefabricated body is pre-embedded with a plurality of second pre-embedded parts distributed at intervals. The second pre-embedded parts extend along a second direction perpendicular to the first direction, and their two ends extend out of the two sides of the prefabricated body, respectively.

[0014] According to some embodiments of the present invention, along the second direction, the second embedded parts of two adjacent precast bodies are connected by connectors, and the space between the two adjacent precast bodies is filled with second concrete.

[0015] According to some embodiments of this utility model, the top of the prefabricated body is provided with multiple lifting points at intervals.

[0016] According to some embodiments of the present invention, the prefabricated unit includes a first prefabricated component and a second prefabricated component, wherein the first prefabricated component is a node structure and the second prefabricated component is a straight plate structure.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1This is a cross-sectional view showing the connection between the prefabricated unit and the constructed part of a large prefabricated assembled caisson according to an embodiment of the present utility model.

[0019] Figure 2 This is an exploded view of the connection between two adjacent prefabricated units of a large prefabricated caisson according to an embodiment of the present utility model.

[0020] Figure 3 This is a simplified cross-sectional view of the connection between the prefabricated unit and the constructed part of a large prefabricated assembled caisson according to an embodiment of the present utility model.

[0021] Figure 4 This is a cross-sectional view of the second prefabricated component of a large prefabricated assembled caisson according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the connection between two adjacent prefabricated units of a large prefabricated caisson according to an embodiment of the present utility model.

[0023] Figure 6 This is a partial top view of a large prefabricated assembled caisson according to an embodiment of the present utility model;

[0024] Figure 7 This is a top view of a large prefabricated assembled caisson according to an embodiment of the present utility model;

[0025] Figure 8 This is a flowchart of the construction method for a large prefabricated assembled caisson according to an embodiment of the present utility model.

[0026] Figure label:

[0027] 100 prefabricated assembled caisson

[0028] Precast unit 10, first precast component 11, second precast component 12, third precast component 13

[0029] Precast body 21, upper connecting steel plate 22, upper connecting part 221, upper extension part 222, shear member 223, lower connecting steel plate 23, lower connecting part 231, lower extension part 232, support member 24, through hole 25, first embedded part 26, second embedded part 27, lifting point 28.

[0030] First concrete 30, connector 40, second concrete 50. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0033] The prefabricated caisson 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0034] Reference Figures 1-3 According to an embodiment of the present utility model, a large prefabricated caisson 100 includes multiple prefabricated units 10, which are assembled and connected to form a caisson.

[0035] Reference Figure 1 and Figure 2 The prefabricated unit 10 includes a prefabricated body 21. An upper connecting steel plate 22 and a lower connecting steel plate 23 are respectively provided at both ends of the prefabricated body 21 along a first direction. The first direction can be the length direction, width direction, etc., of the prefabricated body 21. In this application, the first direction is the length direction of the prefabricated body 21. The upper connecting steel plate 22 and the lower connecting steel plate 23 are respectively provided at both ends of the prefabricated body 21 along the first direction, so that the lower end of the prefabricated unit 10 is connected to the already constructed caisson structure via the lower connecting steel plate 23, and the upper end is connected to the prefabricated unit 10 to be connected via the upper connecting steel plate 22.

[0036] The upper connecting steel plate 22 and the lower connecting steel plate 23 can be made of the same material or different materials. Preferably, the upper connecting steel plate 22 and the lower connecting steel plate 23 are made of the same material, which is steel plate. The thickness of the steel plate can be 1.3cm-1.8cm, and preferably, the thickness of the steel plate is 1.6cm.

[0037] Reference Figure 1 and Figure 2The upper connecting steel plate 22 includes an upper connecting portion 221 connected to the top outer periphery of the precast body 21, and an upper extension portion 222 extending out of the top. In this way, at least a portion of the upper connecting steel plate 22 is connected to the top outer periphery of the precast body 21, thereby improving the connection strength between the upper connecting steel plate 22 and the precast body 21.

[0038] Reference Figure 1 and Figure 2 The lower connecting steel plate 23 includes a lower connecting portion 231 connected to the bottom outer periphery of the precast body 21, and a lower extension portion 232 extending out of the bottom. In this way, at least a portion of the lower connecting steel plate 23 is connected to the bottom outer periphery of the precast body 21, thereby improving the connection strength between the lower connecting steel plate 23 and the precast body 21.

[0039] Reference Figure 1 and Figure 3 Along the first direction, the top or bottom of the prefabricated body 21 is provided with a plurality of support members 24, and the length of the support member 24 is equal to the sum of the length of the upper extension 222 and the length of the lower extension 232.

[0040] Specifically, the support member 24 can be located at the top or bottom of the prefabricated body 21. Multiple support members 24 can be spaced apart or arranged symmetrically in pairs, so as to stably support two adjacent prefabricated bodies 21 in the first direction.

[0041] Reference Figure 1 Along the first direction, the length of the support member 24 is equal to the sum of the length of the upper extension 222 and the length of the lower extension 232. In this way, when two adjacent prefabricated bodies 21 are supported by the support member 24, the lower extension 232 of the upper prefabricated unit 10 comes into contact with the upper extension 222 of the lower prefabricated unit 10, which facilitates connection. For example, the upper extension 222 and the lower extension 232 can be connected by welding or the like.

[0042] Therefore, referring to Figures 1-3According to the large prefabricated assembled caisson 100 of this utility model, by setting up a prefabricated unit 10 including an upper connecting steel plate 22 and a lower connecting steel plate 23, two adjacent prefabricated units 10 can be connected by the upper connecting steel plate 22 and the lower connecting steel plate 23. The upper connecting part 221 improves the connection strength between the upper connecting steel plate 22 and the precast body 21, and the lower connecting part 231 improves the connection strength between the lower connecting steel plate 23 and the precast body 21. Multiple support members 24 are provided at the top or bottom of the precast body 21 to stably support the upper and lower adjacent precast bodies 21. Along the first direction, the length of the support member 24 is equal to the sum of the length of the upper extension 222 and the length of the lower extension 232, so that when two adjacent precast bodies 21 are supported by the support member 24, the lower extension 232 of the upper precast unit 10 contacts the upper extension 222 of the lower precast unit 10, which facilitates connection. Adjacent precast bodies 21 can also be connected by filling with connecting material. In this way, compared with the traditional cast-in-place cement caisson method, the construction cycle is shortened, the difficulty of quality control is reduced, and the impact on the site environment is smaller. Compared with the simple assembly for small structures, the overall strength of the assembled structure is improved.

[0043] In some embodiments of this utility model, reference is made to Figure 1 and Figure 3 Along the first direction, a receiving space is formed between two adjacent precast bodies 21, and the receiving space is filled with first concrete 30.

[0044] By filling the space between two adjacent precast bodies 21 along the first direction with first concrete 30, the two adjacent precast units 10 are connected together, resulting in a strong connection.

[0045] Specifically, the first concrete 30 can be UHPC concrete. Of course, this application is not limited to this. In other embodiments, the first concrete 30 can also be other concretes or other materials with a compressive strength greater than or equal to 120MPa.

[0046] In some embodiments of this utility model, reference is made to Figure 1 and Figure 3 The prefabricated body 21 is provided with a plurality of spaced through holes 25, which extend along the first direction.

[0047] By providing multiple through holes 25 that extend along the first direction, it is convenient to inject filling materials such as first concrete 30 through the through holes 25.

[0048] The through holes 25 can be randomly spaced or evenly spaced at a certain interval. In this application, the through holes 25 are spaced at intervals of 2.5m. The shape of the through holes 25 is not limited and can be round, square, etc. In this application, the through holes 25 are round holes with a diameter of 35cm.

[0049] In some embodiments of this utility model, reference is made to Figure 1 and Figure 2 Multiple shear members 223 are respectively provided on the side of the upper connecting steel plate 22 and the lower connecting steel plate 23 facing the precast body 21.

[0050] By setting shear member 223, the connection strength between the upper connecting steel plate 22 and the lower connecting steel plate 23 and the precast body 21 is improved. At the same time, after the connection material is filled between the two adjacent precast bodies 21, the shear member 223 is located in the filling material, which improves the connection strength between the shear member 223 and the filling material, and ultimately improves the connection strength between the two adjacent precast units 10.

[0051] Specifically, the shear member 223 can be a shear stud embedded in the upper connecting steel plate 22 and the lower connecting steel plate 23. The shear studs can be randomly spaced between the upper connecting steel plate 22 and the lower connecting steel plate 23, or they can be evenly distributed between the upper connecting steel plate 22 and the lower connecting steel plate 23. In this application, the shear studs are arranged in a quincunx pattern on the upper connecting steel plate 22 and the lower connecting steel plate 23, and the distance between adjacent shear studs is 20cm.

[0052] In some embodiments of this utility model, the upper connecting steel plate and the lower connecting steel plate are respectively provided with slurry discharge pipes, which connect the accommodating space and the external environment.

[0053] By installing a grout discharge pipe, it is easy to confirm whether the containment space has been filled with the first concrete.

[0054] Specifically, the slurry discharge pipe extends along the first direction, with one end located in the containment space and the other end facing the external environment.

[0055] In some embodiments of this utility model, reference is made to Figure 1 and Figure 2 The precast body 21 has multiple spaced first embedded parts 26. The first embedded parts 26 extend along the first direction and extend out of the top and bottom of the precast body 21 at both ends.

[0056] By pre-embedding multiple first embedded parts 26 in the prefabricated body 21, and having the first embedded parts 26 extend from the top and bottom of the prefabricated body 21 at both ends in the first direction, the structural strength of the pre-embedded body is improved.

[0057] Specifically, the first embedded part 26 can be a pre-embedded reinforcing bar. Along the first direction, the projected lengths of the upper connecting steel plate 22 and the lower connecting steel plate 23 onto the first embedded part 26 are both greater than or equal to 20cm. For example, along the first direction, the projected lengths of the upper connecting steel plate 22 and the lower connecting steel plate 23 onto the first embedded part 26 are 20cm, 25cm, 30cm, 35cm, etc.

[0058] In some embodiments of this utility model, reference is made to Figure 4 and Figure 5 The precast body 21 has multiple second embedded parts 27 that are spaced apart. The second embedded parts 27 extend along a second direction perpendicular to the first direction, and extend out of the two sides of the precast body 21 at both ends.

[0059] By pre-embedding multiple second embedded parts 27 in the prefabricated body 21, and having the second embedded parts 27 extend from the top and bottom of the prefabricated body 21 at both ends in the first direction, the structural strength of the embedded body is improved.

[0060] Specifically, the second embedded part 27 can be a pre-embedded steel bar.

[0061] In some embodiments of this utility model, reference is made to Figure 5 and Figure 6 Along the second direction, the second embedded parts 27 of two adjacent precast bodies 21 are connected by connectors 40, and the space between the two adjacent precast bodies 21 is filled with second concrete 50.

[0062] The second embedded parts 27 of two adjacent precast bodies 21 along the second direction are connected by connector 40 to connect the two adjacent precast bodies. Since the connector 40 connects the second embedded parts 27, there is a gap between the two adjacent precast bodies 21. The gap is filled with second concrete 50 to improve the strength of the connection between the two adjacent precast bodies 21.

[0063] Specifically, connector 40 can be a threaded sleeve; further, connector 40 can be a primary connector straight threaded sleeve. The second concrete 50 can be C35 micro-expansion concrete.

[0064] In some embodiments of this utility model, reference is made to Figure 6 The top of the prefabricated body 21 is provided with multiple lifting points 28 at intervals.

[0065] By setting multiple lifting points 28 at intervals on the top of the prefabricated body 21, it is convenient to lift the prefabricated unit 10.

[0066] Specifically, the lifting point 28 can be made of high-strength material; for example, the lifting point 28 can be made of high-strength alloy steel. Multiple lifting points 28 can be spaced apart; for example, two can be arranged symmetrically, or they can be arranged evenly, etc.

[0067] In some embodiments of this utility model, reference is made to Figure 6 The prefabricated unit 10 includes a first prefabricated component 11 and a second prefabricated component 12. The first prefabricated component 11 is a node structure, and the second prefabricated component 12 is a straight plate structure.

[0068] In this application, the node structure is a cross-shaped node, and the straight plate structure is a straight plate. The first prefabricated part 11 of the cross-shaped node can serve as the four corners of the well hole, and the second prefabricated part 12 of the straight plate can serve as the four sides of the well hole.

[0069] In some embodiments, refer to Figure 7 The prefabricated unit 10 also includes a third prefabricated component 13, which is cylindrical and serves as the well wall of the caisson.

[0070] Example

[0071] The dimensions of the first precast component 11 are 3.85m × 3.85m × 4.25m (length × width × thickness), and its weight is 108.0t-109.0t. Preferably, the weight of the first precast component 11 is 108.3t. The dimensions of the second precast component 12 are 7.7m × 4.25m × 1.5m (length × width × thickness), and its weight is 127.0t-128.0t. Preferably, the weight of the second precast component 12 is 127.6t.

[0072] The first precast component 11 includes two spaced-apart lifting points 28, and the second precast component 12 includes four lifting points 28, which are symmetrically arranged in pairs. The lifting points 28 can be made of steel bars with a tensile strength greater than or equal to 980 MPa.

[0073] The first precast component 11 has four first embedded parts 26 embedded at intervals, and the second precast component 12 has six first embedded parts 26 embedded at intervals. The material of the first embedded parts 26 can be Q345B steel.

[0074] A through hole 25 is provided at the center of the first precast component 11 for pouring the first concrete 30. The diameter of the through hole 25 can be 35cm. A through hole 25 can be provided every 2.5m in the second precast component 12, for a total of three through holes 25. The diameter of the through hole 25 can be 35cm.

[0075] The support member 24 can be an H-shaped structure, the material of the support member 24 can be steel, and the cross-sectional dimensions of the support member 24 can be 400mm×400mm×12mm×20mm. The support member 24 can be connected to the precast body 21 by welding, wherein the welding spacing is less than or equal to 3m.

[0076] Reference Figure 8 For example, the construction method of the prefabricated assembled caisson of this application includes the following steps:

[0077] Step 1: Prepare prefabricated units, including preparing a first prefabricated component and a second prefabricated component. The first prefabricated component is a node structure, and the second prefabricated component is a straight plate structure.

[0078] In this application, the node structure can be a cross-shaped node, and the straight plate structure can be a straight plate. The dimensions of the first precast component are 3.85m × 3.85m × 4.25m (length × width × thickness), and the weight of the first precast component is 108.3t. The dimensions of the second precast component are 7.7m × 4.25m × 1.5m (length × width × thickness), and the weight of the second precast component is 127.6t.

[0079] The first precast component has four symmetrical hanging points embedded in its top, and the second precast component has two symmetrical hanging points embedded in its top.

[0080] The precast unit has an upper connecting steel plate and a lower connecting steel plate embedded in it. The upper and lower connecting steel plates are 1.6 cm thick. Shear studs are provided on the side of the upper and lower connecting steel plates facing the precast body, and the shear studs are distributed in a quincunx pattern. The precast body also has a first embedded part, a second embedded part, and a through hole for pouring the first concrete.

[0081] After the prefabricated units are prepared, they can be transported to the construction site using a dedicated flatbed truck, with anti-tipping and fixing devices installed during transportation. The site is then cleared and surveyed to ensure the caisson installation position accuracy is less than ±5mm; followed by the commencement of the bottom layer construction.

[0082] Step 2: Use hoisting equipment to hoist the first precast component to the constructed node segment, connect the first precast component and the node segment through support components, weld the upper extension of the constructed node segment and the lower extension of the first precast component, and pour the first concrete into the space enclosed by the upper extension of the constructed node segment and the lower extension of the first precast component.

[0083] The second precast component is hoisted onto the constructed straight plate segment using a crawler crane, and the second precast component is connected to the straight plate segment via a support. The upper extension of the constructed type I segment and the lower extension of the second precast component are welded together, and the first concrete is poured into the space enclosed by the upper extension of the constructed straight plate segment and the lower extension of the second precast component.

[0084] The first concrete used above is UHPC concrete with a compressive strength greater than or equal to 100MPa, and is poured using a self-leveling method. The initial setting time is ≤30 minutes. After compaction, it is cured for 48 hours.

[0085] The hoisting equipment can be a crawler crane.

[0086] Step 3: In the second direction, the first precast component and the second precast component are connected by connectors, and the second concrete is poured into the gap between the first precast component and the second precast component.

[0087] Specifically, a first-stage straight threaded sleeve is used to connect the second embedded part located on the first precast part and the second precast part to connect the first precast part and the second precast part. Then, C35 micro-expansion concrete is poured into the joint between the first precast part and the second precast part. The expansion rate of C35 micro-expansion concrete is 0.02%-0.05%, and it is cured for 72 hours.

[0088] During installation, the verticality deviation is monitored in real time using a laser rangefinder to ensure that the overall verticality is ≤1 / 1000.

[0089] Conduct overall settlement monitoring.

[0090] Project Acceptance and Subsequent Construction: Joint Strength Testing: The joint density is tested using an ultrasonic tester, and the impermeability grade is ≥P8. After acceptance, the caisson is further heightened and subsequently sunk according to design requirements.

[0091] According to the construction method of the prefabricated assembled caisson of this utility model, the prefabricated units can be produced in a standardized manner in the prefabrication yard. Refined design can reduce material waste and avoid waste of scrap materials from on-site casting. Prefabricated units of the same type can be reused, reducing the one-time investment in steel plates and the need for on-site labor. Only a small number of skilled workers are required for hoisting and assembly during the construction phase, reducing labor costs. Factory production and on-site construction can be carried out simultaneously, shortening the construction period and reducing on-site management personnel and equipment rental costs. Prefabricated assembly construction can effectively save construction costs.

[0092] On-site construction only requires hoisting, splicing, and joint treatment, avoiding time-consuming processes such as steel plate installation and concrete curing required for cast-in-place construction. Standardized prefabricated unit production in the factory ensures precise component dimensions, reducing on-site correction and rework time and improving quality control.

[0093] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0094] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0095] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or that the first feature is at a lower horizontal level than the second feature.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A large prefabricated caisson, characterized in that, It includes multiple prefabricated units, each prefabricated unit including a prefabricated body. The prefabricated body has an upper connecting steel plate and a lower connecting steel plate at both ends along a first direction. The upper connecting steel plate includes an upper connecting portion connected to the outer periphery of the top of the prefabricated body and an upper extension portion extending out of the top. The lower connecting steel plate includes a lower connecting portion connected to the outer periphery of the bottom of the prefabricated body and a lower extension portion extending out of the bottom. Along the first direction, the top or bottom of the prefabricated body is provided with a plurality of support members, and the length of the support member is equal to the sum of the length of the upper extension and the length of the lower extension.

2. The large prefabricated assembled caisson according to claim 1, characterized in that, Along the first direction, a receiving space is formed between two adjacent precast bodies, and the receiving space is filled with first concrete.

3. The large prefabricated assembled caisson according to claim 2, characterized in that, The prefabricated body is provided with a plurality of spaced through holes, which extend along the first direction.

4. The large prefabricated assembled caisson according to claim 1, characterized in that, The upper connecting steel plate and the lower connecting steel plate are respectively provided with multiple shear members on the side facing the precast body.

5. The large prefabricated assembled caisson according to claim 2, characterized in that, The upper connecting steel plate and the lower connecting steel plate are respectively provided with slurry discharge pipes, which connect the accommodating space and the external environment.

6. The large prefabricated assembled caisson according to claim 5, characterized in that, The prefabricated body has a plurality of spaced-apart first embedded parts, which extend along the first direction and extend out of the top and bottom of the prefabricated body at both ends, respectively. Along the first direction, the projected lengths of the upper connecting steel plate and the lower connecting steel plate on the first embedded part are both greater than or equal to 20cm.

7. The large prefabricated assembled caisson according to claim 1, characterized in that, The prefabricated body has multiple spaced second embedded parts, which extend along a second direction perpendicular to the first direction, and extend from both ends of the two sides of the prefabricated body.

8. The large prefabricated assembled caisson according to claim 7, characterized in that, Along the second direction, the second embedded parts of two adjacent precast bodies are connected by connectors, and the space between the two adjacent precast bodies is filled with second concrete.

9. The large prefabricated assembled caisson according to claim 1, characterized in that, The prefabricated body has multiple lifting points spaced apart on its top.

10. The large prefabricated assembled caisson according to claim 1, characterized in that, The prefabricated unit includes a first prefabricated component and a second prefabricated component. The first prefabricated component is a node structure, and the second prefabricated component is a straight plate structure.

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