Fabricated caisson and construction technology thereof

Abstract

The invention belongs to the technical field of caisson construction, and relates to a fabricated caisson and a construction process thereof. The caisson comprises a base section and a plurality of wall body sections stacked on the top of the base section. The base section comprises a bottom plate, a plurality of transverse wall plates and a plurality of longitudinal wall plates, the transverse wall plates and the longitudinal wall plates are arranged on the bottom plate in a crossed mode, so that the base section is provided with a plurality of bottomed bin grids with upper openings, and the base section is integrally formed through casting; the wall body section comprises a plurality of bin cell modules, each bin cell module comprises two transverse partition plates arranged oppositely and two longitudinal partition plates arranged oppositely, the two transverse partition plates and the two longitudinal partition plates define a square, and corner point pieces are arranged at the intersection points of the two transverse partition plates and the two longitudinal partition plates; vertical joints are formed between the corner pieces and the transverse partition plates and the longitudinal partition plates which are adjacent to the corner pieces so as to form a post-cast strip through cast-in-place; a plurality of prestress through holes extending vertically are correspondingly formed in the corner piece and the base section, steel strands are arranged in the prestress through holes in a penetrating mode, and dry connection between the base section and the wall body sections is achieved through tensioning and anchoring of the steel strands. The construction efficiency of the caisson can be improved, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of caisson construction, and particularly relates to a prefabricated caisson and its construction technology. Background Art

[0002] Caissons are common hydraulic structures in the field of water transportation engineering and are used as structural foundations for docks, breakwaters, etc. Usually, a caisson is an open-top box-shaped structure made of reinforced concrete, and its interior is divided into multiple compartments. The traditional caisson production usually adopts an integral prefabrication process, which requires integral prefabrication in a special prefabrication yard. With the development of caissons towards large-scale, the traditional integral prefabrication construction of caissons requires a large amount of steel works, formwork works, and concrete works, and has problems such as a large number of manual requirements, a long cross-operation time of lifting equipment processes, a low quality assurance rate of manual curing, low construction efficiency, high caisson construction costs, and a long cycle. Therefore, the traditional integral prefabrication process of caissons cannot well meet the development trend of large-scale caissons.

[0003] Patent CN212104151U discloses a prefabricated reinforced concrete caisson, which designs the entire caisson as being connected by upper and lower sections of caissons. Although it reduces the production height and hoisting difficulty of the caisson, the upper and lower sections of caissons still adopt an integral prefabrication and forming process respectively, the formwork volume required for caisson prefabrication is still very large, the caisson construction cost is still relatively high, and the construction efficiency is relatively low. Summary of the Invention

[0004] In view of the deficiencies in the related art, the present invention provides a prefabricated caisson and its construction technology, aiming to improve the construction efficiency of the caisson and reduce the construction cost of the caisson.

[0005] The present invention provides a prefabricated caisson, including:

[0006] A base section, which includes a bottom plate, a plurality of transverse wall plates and a plurality of longitudinal wall plates located on the top surface of the bottom plate; the plurality of transverse wall plates and the plurality of longitudinal wall plates are vertically and crosswise arranged, so that the base section has a plurality of bottomed compartments with open tops; the base section is a reinforced concrete structure and is integrally cast in place;

[0007] A plurality of wall sections stacked successively from bottom to top, and the lowermost wall section is stacked on the top of the base section; each wall section includes a plurality of compartment modules, and each compartment module includes two relatively arranged transverse partition plates and two relatively arranged longitudinal partition plates. The two transverse partition plates and the two longitudinal partition plates enclose a square, and corner pieces are provided at the intersection points of the transverse partition plates and the longitudinal partition plates. The corner pieces are T-shaped corner pieces or cross-shaped corner pieces; vertical joints are formed between the corner pieces and their adjacent transverse partition plates and between the corner pieces and their adjacent longitudinal partition plates, and post-cast strips are formed at the vertical joints through a cast-in-place process; the plurality of compartment modules on each wall section correspond one by one to the plurality of bottomed compartments on the base section; the transverse partition plates, the longitudinal partition plates, and the corner pieces are all prefabricated reinforced concrete components;

[0008] On each corner piece and on the base section, a plurality of vertically extending prestressed through holes are correspondingly provided. A steel strand is inserted into each prestressed through hole, so as to realize the dry connection between the base section and a plurality of wall sections through the tensioning and anchoring of the steel strands.

[0009] In some embodiments, a horizontal joint is formed between the bottom surface of the lowermost wall section and the top surface of the base section, and between the top surface of the lower wall section and the bottom surface of the upper wall section. Epoxy resin glue and quartz sand are smeared at the horizontal joint.

[0010] In some embodiments, a plurality of first circular steel bars arranged at vertical intervals extend outward from the end side of each corner piece facing the vertical joint; a plurality of second circular steel bars arranged at vertical intervals extend outward from the end side of each cross partition and each longitudinal partition facing the vertical joint; the plurality of first circular steel bars and the plurality of second circular steel bars at each vertical joint are arranged alternately up and down, and the first circular steel bars and the second circular steel bars are tied together by a plurality of vertical steel bars.

[0011] In some embodiments, a shear groove is recessed on the bottom surface of each cross partition or longitudinal partition above each horizontal joint; a plurality of shear keys that are respectively matched with the plurality of shear grooves protrude from the top surface of the base section or the wall section below each horizontal joint.

[0012] In some embodiments, a shear groove is recessed on the bottom surface of each cross partition and each longitudinal partition above each horizontal joint; a plurality of shear keys that are respectively matched with the plurality of shear grooves protrude from the top surface of the base section or the wall section below each horizontal joint.

[0013] In some embodiments, the plate thickness of the two outermost transverse wall plates on the base section is greater than that of other transverse wall plates, and the plate thickness of the two outermost longitudinal wall plates on the base section is greater than that of other longitudinal wall plates; the plate thickness of the outermost cross partition on the wall section is greater than that of other cross partitions, and the plate thickness of the outermost longitudinal partition on the wall section is greater than that of other longitudinal partitions.

[0014] The present invention also provides a construction process for an assembled caisson, which is applicable to the aforementioned assembled caisson, and includes the following steps:

[0015] Prefabricate cross partitions, longitudinal partitions and corner pieces in a factory;

[0016] Record the bin module at the i-th row and the j-th column on each wall section as G ig ; where i = 1, 2, 3,..., j = 1, 2, 3,...; Assemble a plurality of bin modules G mn , where m and n are both odd numbers, m = 1, 3,..., n = 1, 3,...; In each bin module G mnForm a post-cast strip by erecting formwork on the outside of all vertical joints through in-situ casting technology;

[0017] Cast and form the base section at the position to be constructed of the project foundation;

[0018] Stack multiple bin modules G of the lowest wall section mn and other bin modules G xy required diaphragm walls, longitudinal partition walls or corner pieces on the top of the base section, where x and y are both even numbers, x = 2, 4,..., y = 2, 4,...; Erect formwork on the outside of all vertical joints of each bin module G xy to form a post-cast strip through in-situ casting technology; The steel strands pass through the prestressed through holes in the base section and the corner pieces of the lowest wall section in sequence, and complete the dry connection between the base section and the lowest wall section by tensioning the steel strands;

[0019] Stack multiple bin modules G of the upper wall section mn and other bin modules G xy required diaphragm walls, longitudinal partition walls or corner pieces on the top of the already connected wall section; Erect formwork on the outside of all vertical joints of each bin module G xy to form a post-cast strip through in-situ casting technology; The steel strands pass through the prestressed through holes in the base section, the already connected wall section and the corner pieces of the current wall section in sequence, and complete the dry connection between the base section and the current wall section by tensioning the steel strands; Complete the stacking and connection of other wall sections layer by layer according to this process, and then complete the construction of the prefabricated caisson.

[0020] In some embodiments, when assembling the bin module, a plurality of first circular steel bars and a plurality of second circular steel bars at each vertical joint are arranged alternately up and down, and a plurality of vertical bars are vertically abutted against the alternately arranged first circular steel bars and second circular steel bars, and the vertical bars are tied to the first circular steel bars and second circular steel bars by stirrups.

[0021] In some embodiments, when stacking the lowest wall section on the base section, apply epoxy resin glue and quartz sand on the top surface of the base section; When stacking the upper wall section on the already connected wall section, apply epoxy resin glue and quartz sand on the top surface of the already connected wall section.

[0022] Based on the above technical solutions, the prefabricated caisson and its construction technology in the embodiments of the present invention realize the prefabricated construction of the caisson through the segmented setting of the caisson, the prefabrication of wall section sub-components, the modular assembly of wall sections and the in-situ connection between modules, and the tensioning and anchoring of steel strands between the upper and lower structures of the caisson, significantly improving the construction efficiency and construction quality of the caisson, reducing the construction cost, and being able to better meet the development trend of the large-scale caisson. Description of the Drawings

[0023] The accompanying drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 is a three-dimensional schematic view of the prefabricated caisson of the present invention;

[0025] Figure 2 is a disassembly schematic view of the prefabricated caisson of the present invention in the vertical direction;

[0026] Figure 3 is a top view of the wall section of the prefabricated caisson of the present invention;

[0027] Figure 4 is a first assembly schematic view of the compartment module of the wall section of the prefabricated caisson of the present invention;

[0028] Figure 5 is a second assembly schematic view of the compartment module of the wall section of the prefabricated caisson of the present invention;

[0029] Figure 6 is a third assembly schematic view of the compartment module of the wall section of the prefabricated caisson of the present invention;

[0030] Figure 7 is a top view of the vertical joint of the wall section of the prefabricated caisson of the present invention;

[0031] Figure 8 is a three-dimensional schematic view of the vertical joint of the wall section of the prefabricated caisson of the present invention;

[0032] Figure 9 is a partial side view of the horizontal joint of the prefabricated caisson of the present invention;

[0033] Figure 10 is a schematic view of the prestressed steel strand reserved hole of the prefabricated caisson of the present invention;

[0034] Figure 11 is a schematic view of the anchorage end of the prestressed steel strand of the prefabricated caisson of the present invention.

[0035] In the figures: 10, base section; 11, bottom plate; 12, transverse wall panel; 13, longitudinal wall panel; 101, bottomed compartment; 20, wall section; 21, transverse partition; 22, longitudinal partition; 23, corner piece; 24, T-shaped corner piece; 25, cross-shaped corner piece; 26, post-cast strip; 27, first circular steel bar; 28, second circular steel bar; 29, vertical steel bar; 201, compartment module; 202, vertical joint; 203, shear groove; 204, shear key; 30, horizontal joint; 31, prestressed through hole; 32, steel strand. Detailed Embodiments

[0036] The following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "transverse", "longitudinal", "upper", "lower", "top", "bottom", "inner", "outer", "left", "right", "front", "rear", "vertical", "horizontal", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0038] The terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Refer to Figures 1-11 As shown, the present invention provides a prefabricated caisson, which is used as an engineering foundation for water transportation projects and the like. The prefabricated caisson includes a base section 10 and a plurality of wall sections 20; the plurality of wall sections 20 are stacked in sequence from bottom to top, and the lowermost wall section 20 is stacked on the top of the base section 10.

[0041] The base section 10 includes a bottom plate 11, a plurality of transverse wall plates 12 and a plurality of longitudinal wall plates 13 located on the top surface of the bottom plate 11. The plurality of transverse wall plates 12 and the plurality of longitudinal wall plates 13 are respectively arranged in parallel at intervals; the plurality of transverse wall plates 12 and the plurality of longitudinal wall plates 13 are arranged perpendicular to each other and intersect, so that the base section 10 has a plurality of bottomed compartments 101 with upper openings. The base section 10 is a reinforced concrete structure and is integrally cast in place at the construction site.

[0042] Each wall section 20 includes multiple compartment modules 201, and the compartment module 201 includes two oppositely arranged transverse partitions 21 and two oppositely arranged longitudinal partitions 22. The two transverse partitions 21 and the two longitudinal partitions 22 form a square, and a corner piece 23 is provided at the intersection of the transverse partition 21 and the longitudinal partition 22; it can be understood that the compartment module 201 has a vertically extending through cavity, and there is a common corner piece 23, transverse partition 21 or longitudinal partition 22 between any two adjacent compartment modules 201; when the corner piece 23 is located on the outer periphery of the wall section 20, the corner piece 23 is a T-shaped corner piece 24; when the corner piece 23 is located inside the wall section 20, the corner piece 23 is a cross-shaped corner piece 25. A vertical joint 202 is formed between each corner piece 23 and its adjacent transverse partition 21, and between each corner piece 23 and its adjacent longitudinal partition 22. A post-cast strip 26 is formed at the vertical joint 202 by a cast-in-place process, thereby connecting and forming the cell modules 201 of the wall body section 20 by cast-in-place. The multiple cell modules 201 on each wall body section 20 correspond one-to-one to the multiple bottomed cells 101 on the base section 10 in the vertical direction. Furthermore, the transverse partition 21, the longitudinal partition 22, and the corner piece 23 are all reinforced concrete prefabricated parts, which are prefabricated and formed in the factory.

[0043] A plurality of prestressed through holes 31 extending vertically and interconnected are correspondingly provided on each corner piece 23 (including a T-shaped corner piece 24 and a cross-shaped corner piece 25) and on the base section 10, and a steel strand 32 is passed through each prestressed through hole 31; the lower ends of the plurality of steel strands 32 are anchored on the base section 10, and the upper ends of the plurality of steel strands 32 are respectively anchored on the top of each wall section 20, so that a dry connection between the base section 10 and the plurality of wall sections 20 is achieved by tensioning and anchoring the steel strands 32.

[0044] To further explain, during the construction of the caisson, a plurality of transverse partitions 21, longitudinal partitions 22 and corner pieces 23 are first prefabricated in the factory, and then every two transverse partitions 21, every two longitudinal partitions 22 and every four corner pieces 23 are assembled into a cell module 201, and a post-cast strip 26 is formed at the vertical joint 202 of the cell module 201 by a cast-in-place process, thereby completing the individual production of the plurality of cell modules 201 on the plurality of wall sections 20; it should be noted that, since corner pieces 23, transverse partitions 21 or longitudinal partitions 22 are shared between any two adjacent cell modules 201 on each wall section 20, the plurality of individually produced cell modules 201 are arranged on the wall section 20 in a non-adjacent interval state. At the construction site of the engineering foundation, the base section 10 is first cast in situ at the location where the caisson is to be constructed; then, multiple manufactured compartment modules 201 of the lowest wall section 20 and the transverse partitions 21, longitudinal partitions 22 or corner pieces 23 required for other compartment modules 201 are stacked on the base section 10, and post-cast strips 26 are formed at the vertical joints 202 at both ends of the transverse partitions 21 and the longitudinal partitions 22 of other compartment modules 201 by a cast-in-situ process, thereby completing the molding of the lowest wall section 20; the steel strands 32 are sequentially passed through the prestressed through holes 31 in the base section 10 and the corner pieces 23 of the lowest wall section 20, and the dry connection between the base section 10 and the lowest wall section 20 is completed by tensioning the steel strands 32; according to this process, the wall sections 20 of each layer above are stacked and connected in turn, thereby completing the construction of the assembled caisson.

[0045] In the above exemplary embodiment, the caisson is divided into a base section 10 and a plurality of wall sections 20 along the height direction, the base section 10 is cast-in-situ, and the wall section 20 is cast-in-situ connected by a plurality of prefabricated parts, so that the factory prefabrication of the components of the wall section 20 can be realized and can be carried out simultaneously with the cast-in-situ molding process of the base section 10, and the layered cast-in-situ overlapping construction of the caisson is realized. Compared with the traditional caisson overall prefabrication molding method or the upper and lower two-section caisson assembly method mentioned in the background technology, this embodiment significantly reduces the template volume required for the caisson construction and maintenance time, reducing the difficulty of lifting, reducing the construction cost of the caisson, greatly saving the on-site construction time of the caisson, improving the construction efficiency of the caisson, and thus shortening the construction period of the entire project; by setting prestressed through holes 31 at each corner point of the caisson and passing the steel strands 32, the dry connection between the upper and lower multi-layer structures of the caisson can be achieved through the tensioning and anchoring of the steel strands 32, reducing the amount of docking engineering on the construction site, and effectively improving the assembly efficiency of the upper and lower multi-layer structures of the caisson, thereby improving the construction efficiency of the caisson, which can better meet the development trend of large-scale caissons.

[0046] refer to Figure 2 , Figure 9As shown, in some embodiments, horizontal joints 30 are formed between the bottom surface of the lowermost wall section 20 and the top surface of the base section 10, and between the top surface of the lower wall section 20 and the bottom surface of the upper wall section 20 adjacent thereto. Epoxy resin glue and quartz sand are applied at the horizontal joints 30. Through the arrangement of the epoxy resin glue and quartz sand in this exemplary embodiment, the fine pores and unevenness at the horizontal joints 30 can be effectively filled, playing a role in leveling and bearing pressure between the adjacent upper and lower layers of the caisson structure, and ensuring the sealing performance of the horizontal joints 30.

[0047] Reference Figures 7-8 As shown, in some embodiments, multiple first circular steel bars 27 are vertically and spacedly extended from the end side of each corner member 23 facing the vertical joint 202; multiple second circular steel bars 28 are vertically and spacedly extended from the end side of each cross diaphragm 21 and each longitudinal diaphragm 22 facing the vertical joint 202; the extended first circular steel bars 27 and second circular steel bars 28 are in a C-shaped state. The multiple first circular steel bars 27 and the multiple second circular steel bars 28 at each vertical joint 202 are arranged alternately up and down, and the first circular steel bars 27 and the second circular steel bars 28 are tied together by multiple vertically extending vertical bars 29, thereby forming a steel bar loop connection structure at the vertical joint 202. On this basis, the vertical joint 202 is cast in situ, which can effectively improve the strength of the post-cast strip 26, and further ensure the structural strength of the bin module 201 and the wall section 20.

[0048] Reference Figure 2 、 Figure 9As shown, in some embodiments, shear grooves 203 are recessed on the bottom surfaces of each diaphragm wall 21 or longitudinal diaphragm wall 22 above each horizontal joint 30; on the top surfaces of the base section 10 or the wall section 20 below each horizontal joint 30, a plurality of shear keys 204 are protruded that are respectively matched with the plurality of shear grooves 203 one by one; it should be noted that the arrangement orientations of the shear grooves 203 and the shear keys 204 are related to the direction of the external force on the caisson, such as the water flow pressure; when the external force on the caisson is consistent with the transverse direction of the caisson, the shear grooves 203 are arranged on the diaphragm wall 21, and when the external force on the caisson is consistent with the longitudinal direction of the caisson, the shear grooves 203 are arranged on the longitudinal diaphragm wall 22. Through the concave-convex matching arrangement of the shear grooves 203 and the shear keys 204 between the upper and lower adjacent layers of the caisson structure, this exemplary embodiment can effectively limit the relative sliding of the upper and lower layers of the caisson structure in the transverse or longitudinal direction, enhancing the stability and shear resistance of the overall caisson structure. Further, in some embodiments, shear grooves 203 are recessed on the bottom surfaces of each diaphragm wall 21 and longitudinal diaphragm wall 22 above each horizontal joint 30; on the top surfaces of the base section 10 or the wall section 20 below each horizontal joint 30, a plurality of shear keys 204 are protruded that are respectively matched with the plurality of shear grooves 203 one by one; thus, it can simultaneously limit the relative sliding of the upper and lower layers of the caisson structure in the transverse and longitudinal directions, further enhancing the stability and shear resistance of the overall caisson structure, and improving the universality of the caisson installation orientation.

[0049] Reference Figures 1-3 As shown, in some embodiments, the plate thicknesses of the two outermost transverse wall plates 12 on the base section 10 are greater than those of the other transverse wall plates 12, and the plate thicknesses of the two outermost longitudinal wall plates 13 on the base section 10 are greater than those of the other longitudinal wall plates 13; the plate thickness of the outermost diaphragm wall 21 on the wall section 20 is greater than that of the other diaphragm walls 21, and the plate thickness of the outermost longitudinal diaphragm wall 22 on the wall section 20 is greater than that of the other longitudinal diaphragm walls 22; thus, while ensuring the strength of the overall caisson structure, the material usage and cost are reduced.

[0050] Reference Figures 1-11 As shown, the present invention also provides a construction process for a prefabricated caisson, applicable to the aforementioned prefabricated caisson, including the following steps:

[0051] Prefabricate the diaphragm walls 21, longitudinal diaphragm walls 22 and corner fittings 23 in the factory, thereby realizing the factory prefabrication production of each component of the wall section 20 and enabling synchronous prefabrication, which is beneficial to reducing the construction cost of the caisson and improving the construction efficiency of the caisson;

[0052] Record the bin module 201 at the i-th row and j-th column on each wall section 20 as G ij ; where, i = 1, 2, 3, …, i max and j = 1, 2, 3, …, j max and i max$j$ is the total number of rows of the bin modules 201 on the wall section 20 max $m$ is the total number of columns of the bin modules 201 on the wall section 20; A plurality of transverse partitions 21, longitudinal partitions 22 and corner pieces 23 are assembled into a plurality of bin modules $G$ mn , where both $m$ and $n$ are odd numbers, $m = 1, 3, \cdots$, $n = 1, 3, \cdots$; For each bin module $G$ mn , form a post-cast strip 26 by casting in place the formwork on the outside of all the vertical joints 202; Thus, the priority production of some bin modules 201 of the wall section 20 is realized, which is beneficial to improving the construction efficiency of the wall section 20 and the caisson

[0053] Cast in place the base section 10 at the position to be constructed of the engineering foundation

[0054] Stack a plurality of bin modules $G$ of the lowermost wall section 20 mn and the transverse partitions 21, longitudinal partitions 22 or corner pieces 23 required for other bin modules $G$ xy on the top of the base section 10, where both $x$ and $y$ are even numbers, $x = 2, 4, \cdots$, $y = 2, 4, \cdots$; For each bin module $G$ xy , form a post-cast strip 26 by casting in place the formwork on the outside of all the vertical joints 202; The steel strand 32 passes through the prestressed through holes 31 in the corner pieces 23 of the base section 10 and the lowermost wall section 20 in sequence, and the dry connection between the base section 10 and the lowermost wall section 20 is completed by tensioning the steel strand 32

[0055] Stack a plurality of bin modules $G$ of the upper layer wall section 20 mn and the transverse partitions 21, longitudinal partitions 22 or corner pieces 23 required for other bin modules $G$ xy on the top of the already connected wall section 20; For each bin module $G$ xy , form a post-cast strip 26 by casting in place the formwork on the outside of all the vertical joints 202; The steel strand 32 passes through the prestressed through holes 31 in the corner pieces 23 of the base section 10, the already connected wall section 20 and the current layer wall section 20 in sequence, and the dry connection between the base section 10 and the current layer wall section 20 is completed by tensioning the steel strand 32; Complete the stacking and connection of other layer wall sections 20 layer by layer according to this process, that is, the steel strand 32 is tensioned after the assembly of each layer of wall section 20 is completed, and then the construction of the prefabricated caisson is completed

[0056] It should be noted that, compared with the method of first fabricating the entire wall section 20 and then hoisting the entire wall section 20 to stack it on the base section 10, in this embodiment, through the disassembly of the wall section 20 and the modular assembly construction method, the use of large hoisting equipment and the hoisting difficulty are reduced, the construction flexibility and construction efficiency are improved, and the modular assembly method and the in-situ connection between modules are more conducive to ensuring the assembly accuracy between the same-layer components of the caisson and between the upper and lower layer structures, thereby improving the construction quality of the caisson.

[0057] Further explanation, when the bin modules 201 of the wall section 20 are arranged in an odd number of rows and an odd number of columns, the number of bin modules 201 to be fabricated first is (i max + 1)·(j max + 1) / 4, as Figure 5 shown; when the bin modules 201 of the wall section 20 are arranged in an odd number of rows and an even number of columns, the number of bin modules 201 to be fabricated first is (i max + 1)·j max / 4. To improve the construction efficiency of the wall section 20 and the caisson, the corner pieces 23, the transverse partitions 21 and the longitudinal partitions 22 can also be used to fabricate three-quarter bin modules 201 first, as Figure 6 shown. The situation when the bin modules 201 of the wall section 20 are arranged in an even number of rows and an odd number of columns is similar; when the bin modules 201 of the wall section 20 are arranged in an even number of rows and an even number of columns, the number of bin modules 201 to be fabricated first is i max ·j max / 4. To improve the construction efficiency of the wall section 20 and the caisson, the corner pieces 23, the transverse partitions 21 and the longitudinal partitions 22 can also be used to fabricate three-quarter bin modules 201 and half bin modules 201 first, as Figure 7 shown.

[0058] Through the sectional construction in the height direction of the caisson, the prefabrication of each component of the wall section 20 in each layer, the modular assembly of the wall section 20 and the in-situ connection between modules, and the tensioning and anchoring of the steel strands 32 between the upper and lower layer structures of the caisson, the above-mentioned exemplary embodiment realizes the prefabricated construction of the caisson, significantly improves the construction efficiency and construction quality of the caisson, reduces the construction cost, and can better meet the development trend of the large-scale caisson.

[0059] Reference Figures 3-8As shown, in some embodiments, when assembling the bin module 201, a plurality of first circular steel bars 27 and a plurality of second circular steel bars 28 at each vertical joint 202 are arranged alternately up and down. A plurality of vertical bars 29 are vertically abutted against the alternately arranged first circular steel bars 27 and second circular steel bars 28, and the vertical bars 29 are tied to the first circular steel bars 27 and the second circular steel bars 28 by stirrups. Further, vertical bars 29 may also be provided at the first circular steel bars 27 and the second circular steel bars 28 except in the alternately arranged area up and down, and tied to the first circular steel bars 27 and the second circular steel bars 28 respectively. Thus, a steel bar loop connection structure is formed at the vertical joint 202. When casting the vertical joint 202 in situ, the strength of the post-cast strip 26 can be effectively improved, and further the structural strength of the bin module 201 and the wall section 20 can be ensured.

[0060] Reference Figure 2 、 Figure 9 As shown, in some embodiments, when stacking the lowermost wall section 20 on the base section 10, epoxy resin glue and quartz sand are applied on the top surface of the base section 10. When stacking the upper layer of the wall section 20 on the connected wall section 20, epoxy resin glue and quartz sand are applied on the top surface of the connected wall section 20. Thus, the fine pores and unevenness at the horizontal joint 30 are filled, the sealing performance at the horizontal joint 30 is ensured, and the laminated assembly effect of each layer of the wall section 20 is improved.

[0061] Through the description of multiple embodiments of the prefabricated caisson and its construction process of the present invention, it can be seen that the present invention has at least one or more of the following advantages:

[0062] 1) Through the segmented setting of the caisson, the integral in-situ casting of the base section 10, the prefabrication of the wall section 20 in sub-components, the modular assembly of the wall section 20, and the in-situ connection between the modules, the factory prefabrication production of each component of the wall section 20 can be realized and can be synchronized with the in-situ casting process of the base section 10, etc. Moreover, the layered in-situ laminated construction of the caisson is realized, the construction cost of the caisson is reduced, the construction efficiency of the caisson is improved, and further the construction period of the whole project can be shortened.

[0063] 2) By arranging prestressed through holes 31 at each corner point of the caisson and threading steel strands 32, the dry connection between the upper and lower multi-layer structures of the caisson can be realized through the tensioning and anchoring of the steel strands 32, the on-site docking workload is reduced, the assembly efficiency of the upper and lower multi-layer structures of the caisson is effectively improved, and further the construction efficiency of the caisson is improved.

[0064] 3) By the concave-convex matching setting of the shear groove 203 and the shear key 204 between the upper and lower adjacent layers of the caisson, the relative slip between the upper and lower layers of the caisson is effectively restricted, and the stability and shear resistance of the overall structure of the caisson are enhanced.

[0065] 4) By alternately arranging the circular steel bars at the vertical joints 202 of the wall section 20, the strength of the post-cast strip 26 formed after the in-situ casting of the vertical joints 202 is improved, the structural strength of the bin module 201 and the wall section 20 is ensured, and thus the overall structural strength of the caisson is ensured;

[0066] 5) By applying epoxy resin glue and quartz sand at the horizontal joints 30 of two adjacent upper and lower layers of the caisson, the fine pores and unevenness at the horizontal joints 30 are filled, and the sealing performance of the horizontal joints 30 of the caisson is ensured.

[0067] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features without departing from the spirit of the technical solutions of the present invention, and they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. An assembled caisson, characterized in that: include: A base section, comprising a bottom plate, a plurality of transverse wall plates and a plurality of longitudinal wall plates located on a top surface of the bottom plate; The plurality of transverse wall plates and the plurality of longitudinal wall plates are vertically and cross-arranged so that the base section has a plurality of bottomed compartments with upper openings; the base section is a reinforced concrete structure and is cast in place; A plurality of wall sections are stacked in sequence from bottom to top, and the wall sections at the bottom are stacked on the top of the base section; each of the wall sections includes a plurality of compartment modules, and the compartment modules include two oppositely arranged transverse partitions and two oppositely arranged longitudinal partitions, and the two transverse partitions and the two longitudinal partitions are arranged to form a square, and a corner piece is provided at the intersection of the transverse partition and the longitudinal partition, and the corner piece is a T-shaped corner piece or a cross-shaped corner piece; vertical joints are formed between the corner piece and the adjacent transverse partition, and between the corner piece and the adjacent longitudinal partition, and post-cast strips are formed at the vertical joints through a cast-in-place process; the plurality of compartment modules on each of the wall sections correspond one-to-one to the plurality of bottom compartments on the base section; the transverse partitions, longitudinal partitions, and corner pieces are all reinforced concrete prefabricated parts; A plurality of prestressed through holes extending vertically are correspondingly opened on each of the corner pieces and the base section, and a steel strand is passed through each of the prestressed through holes, so as to realize dry connection between the base section and a plurality of wall sections by tensioning and anchoring the steel strands.

2. The assembled caisson according to claim 1, characterized in that: Horizontal joints are formed between the bottom surface of the wall section of the lowest layer and the top surface of the base section, and between the top surface of the lower wall section and the bottom surface of the upper wall section, and epoxy resin glue and quartz sand are applied to the horizontal joints.

3. The assembled caisson according to claim 2, characterized in that: A plurality of first annular steel bars arranged at vertical intervals extend outwardly from the end side of each corner piece toward the vertical joint; a plurality of second annular steel bars arranged at vertical intervals extend outwardly from the end side of each transverse partition and each longitudinal partition toward the vertical joint; the plurality of first annular steel bars and the plurality of second annular steel bars at each vertical joint are alternately arranged up and down, and the first annular steel bars and the second annular steel bars are tied together by a plurality of vertical ribs.

4. The assembled caisson according to claim 3, characterized in that: A shear groove is recessed on the bottom surface of each transverse partition or longitudinal partition above each horizontal joint; a plurality of shear keys matching the plurality of shear grooves are convexly disposed on the top surface of the base section or wall section below each horizontal joint.

5. The assembled caisson according to claim 3, characterized in that: A shear groove is recessed on the bottom surface of each transverse partition and longitudinal partition above each horizontal joint; a plurality of shear keys matching the plurality of shear grooves are convexly disposed on the top surface of the base section or wall section below each horizontal joint.

6. The assembled caisson according to claim 3, characterized in that: The thickness of the two outermost transverse wall plates on the base section is greater than the thickness of the other transverse wall plates, and the thickness of the two outermost longitudinal wall plates on the base section is greater than the thickness of the other longitudinal wall plates; the thickness of the outermost transverse partition plate on the wall section is greater than the thickness of the other transverse partition plates, and the thickness of the outermost longitudinal partition plate on the wall section is greater than the thickness of the other longitudinal partition plates.

7. A construction process for an assembled caisson, applicable to an assembled caisson as claimed in any one of claims 3 to 6, characterized in that: The following steps are involved: Prefabricate the transverse partitions, longitudinal partitions and corner pieces in a factory; The cell module in the i-th row and j-th column on each wall segment is denoted as G ij ; wherein i = 1, 2, 3, ..., j = 1, 2, 3, ...; a plurality of said transverse partitions, longitudinal partitions and corner pieces are assembled into a plurality of compartment modules G mn , wherein m and n are both odd numbers, m = 1, 3, ..., n = 1, 3, ...; in each of the compartment modules G mn Formwork is supported on the outside of all vertical joints to form post-cast strips through cast-in-place technology; Casting the base section in situ at the location to be constructed of the engineering foundation; The multiple compartment modules G of the wall section at the bottom layer mn And other compartment modules G xy The required transverse partitions, longitudinal partitions or corner pieces are stacked on the top of the base segment, where x and y are both even numbers, x = 2, 4, ..., y = 2, 4, ...; in each of the compartment modules G xy Formwork is supported outside all vertical joints to form post-cast strips by cast-in-place technology; the steel strands pass through the prestressed through holes in the corner pieces of the base section and the lowest wall section in sequence, and the dry connection between the base section and the lowest wall section is completed by tensioning the steel strands; The multiple compartment modules G of the wall segment of the previous layer mn And other compartment modules G xy The required transverse partitions, longitudinal partitions or corner pieces are stacked on the top of the connected wall sections; in each of the compartment modules G xy Formwork is erected outside all vertical joints to form post-cast strips through a cast-in-place process; the steel strands sequentially pass through the prestressed through holes in the base segment, the connected wall segments and the corner pieces of the current wall segment, and the dry connection between the base segment and the current wall segment is completed by tensioning the steel strands; the wall segments of other layers are stacked and connected layer by layer according to this process, thereby completing the construction of the assembled caisson.

8. The construction process of the assembled caisson according to claim 7 is characterized in that: When assembling the cell module, the multiple first annular steel bars and the multiple second annular steel bars at each vertical joint are arranged alternately up and down, the multiple vertical bars are vertically attached to the first annular steel bars and the second annular steel bars arranged alternately up and down, and the vertical bars are tied to the first annular steel bars and the second annular steel bars through stirrups.

9. The construction process of the assembled caisson according to claim 7, characterized in that: When the lowest wall section is stacked on the base section, epoxy resin glue and quartz sand are applied on the top surface of the base section; when the upper wall section is stacked on the connected wall section, epoxy resin glue and quartz sand are applied on the top surface of the connected wall section.

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