An assembled cantilever support platform for open caisson construction

Abstract

The utility model discloses a kind of assembly type overhanging support platforms for open caisson construction, by multiple horizontal support structures, multiple longitudinal support structures and multiple pre-buried components constitute;Horizontal support structure includes the support plate of horizontal arrangement, its bottom surface is paved with orthogonal strengthening beam group;At the bottom surface both ends of support plate length direction, each along its width direction is fixed with strip slot;Longitudinal support structure includes triangular support frame, its top side is provided with two strip inserts capable of being matched with strip slot, strip insert and strip slot are matched;Second longitudinal support beam is equipped on triangular support frame;Pre-buried connecting piece includes pre-buried steel plate, one side panel surface is fixed with U-shaped frame to form jack with pre-buried steel plate between, multiple pre-buried bars are evenly arranged on the other side panel surface;The support platform is suitable for the operation platform erection of open caisson secondary pouring construction, not only firm structure, high safety, and can greatly improve installation construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of caisson construction technology, and in particular to a prefabricated cantilever support platform for caisson construction. Background Technology

[0002] Currently, caisson construction often employs a phased pouring and sinking process. When implementing this process, before the second pouring operation after the first sinking is completed, a cantilevered support platform needs to be erected inside the caisson for work and internal scaffolding. The current internal cantilevered support platform has the following technical drawbacks: 1) The triangular support frame and embedded parts are welded together, requiring high-altitude welding operations and posing quality risks; 2) The horizontal panels are made of ordinary steel plates, resulting in insufficient rigidity and risks of misalignment; 3) Dismantling requires cutting operations, leading to low construction efficiency and safety hazards; 4) During construction, fixing the outer guardrail is difficult and unstable, posing safety risks. Therefore, it is necessary to design a prefabricated cantilevered support platform with a new structure and assembly method for caisson construction. Utility Model Content

[0003] The purpose of this utility model is to provide a prefabricated cantilever support platform for caisson construction that solves the above-mentioned technical problems.

[0004] Therefore, the technical solution of this utility model is as follows:

[0005] A prefabricated cantilever support platform for caisson construction comprises multiple horizontal support structures, multiple longitudinal support structures, and multiple pre-embedded components; wherein...

[0006] The horizontal support structure includes a horizontally arranged support plate with an orthogonal reinforcing beam assembly laid on its bottom surface; a strip slot is fixed at each end of the bottom surface along the length of the support plate, and the strip slots are arranged along the width of the support plate.

[0007] The longitudinal support structure includes a triangular support frame with two strip plates on its top side that can mate with strip slots. The strip plates mate with the strip slots to insert and connect a single support plate to the longitudinal support structure, or to insert and connect two support plates to the longitudinal support structure simultaneously to achieve splicing; a second longitudinal support beam is provided on the triangular support frame.

[0008] The embedded connector includes an embedded steel plate, on one side of which a U-shaped frame is fixed to form an insertion hole that mates with the second longitudinal support beam; multiple embedded ribs are evenly and vertically arranged on the other side of the embedded steel plate.

[0009] Furthermore, the orthogonal reinforcing beam group consists of multiple transverse reinforcing beams and longitudinal reinforcing beams arranged in a vertically intersecting manner; the multiple transverse reinforcing beams are arranged at equal intervals along the length direction of the support plate and fixed to the bottom surface of the support plate; the multiple longitudinal reinforcing beams are arranged at equal intervals along the width direction of the support plate between adjacent transverse reinforcing beams, and the beam wall of each longitudinal reinforcing beam is fixed to the bottom surface of the support plate, and its two ends abut against and are fixed to the adjacent transverse reinforcing beam.

[0010] Furthermore, the triangular support frame is composed of a transverse support beam, a first longitudinal support beam, and an oblique support beam connected and fixed in sequence; the second longitudinal support beam is vertically spaced on the side adjacent to the first longitudinal support beam, and its top is fixed to the transverse support beam.

[0011] Furthermore, the bottom outer wall of the second longitudinal support beam adjacent to the rubber buffer layer is set as an inclined surface, so that the bottom outer diameter of the second longitudinal support beam gradually decreases from top to bottom.

[0012] Furthermore, each horizontal support structure is equipped with a guardrail assembly, which includes a guardrail and a connecting post. Multiple connecting blocks are fixed from top to bottom on the left and right sides of the guardrail, and each connecting block has screw holes. The connecting post includes a column and two strip connecting plates. The two strip connecting plates are vertically arranged and fixed on the left and right edges of the column. Multiple screw holes are spaced from top to bottom on each connecting plate, and are arranged in a one-to-one correspondence with the screw holes on the multiple connecting blocks, so that the two guardrails are fixedly connected by bolts passing through the connecting blocks and connecting plates. A connecting post is also connected to the outer edge of the guardrail located at the end.

[0013] Furthermore, a base plate is horizontally fixed at the bottom of each column, and connecting holes are symmetrically opened on both sides of the base plate; correspondingly, two guardrail reserved holes are symmetrically opened on both sides of the long edge of the other side of the support plate, so that the guardrail is fixedly connected by bolts passing through the connecting holes and the guardrail reserved holes.

[0014] Furthermore, multiple lifting holes for threading slings are evenly distributed along the circumference of the support plate.

[0015] Furthermore, multiple positioning pins are provided on the top surface of the support plate. The spacing between adjacent positioning pins in the length and width directions of the support plate is adapted to the spacing between adjacent longitudinal steel pipes at the bottom of the cantilever scaffold to be erected in the length and width directions, respectively, so as to achieve positioning by fitting the bottom end of the longitudinal steel pipe onto the positioning pin.

[0016] Compared with existing technologies, this prefabricated cantilever support platform for caisson construction is suitable for the erection of working platforms during the secondary pouring of caissons. In its structural design, it utilizes multiple pre-embedded components on the outer wall of the caisson, which interlock with the longitudinal support structure. The horizontal support structure then interlocks with the longitudinal support structure, reducing high-altitude welding operations and achieving non-destructive connection and dismantling. Furthermore, the support platform adopts a modular assembly design, which not only results in high structural strength after interlocking assembly but also significantly improves installation efficiency. The matching prefabricated guardrail components enable rapid installation and ensure secure fixing. Ultimately, this support platform achieves excellent results in both efficient construction and robust safety. Attached Figure Description

[0017] Figure 1 This is a side view of the prefabricated cantilever support platform for caisson construction in an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the other side of the prefabricated cantilever support platform for caisson construction in this embodiment of the present invention;

[0019] Figure 3 This is a top view schematic diagram of the horizontal support structure of the prefabricated cantilever support platform for caisson construction in this embodiment of the present invention;

[0020] Figure 4 This is a bottom view of the horizontal support structure of the prefabricated cantilever support platform for caisson construction in this embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the longitudinal support structure of the prefabricated cantilever support platform for caisson construction in this embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the pre-embedded components of the prefabricated cantilever support platform for caisson construction in this embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the guardrail assembly of the prefabricated cantilever support platform for caisson construction in this embodiment of the present invention. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0025] See Figure 1 and Figure 2 The prefabricated cantilever support platform for caisson construction is assembled and fixed by multiple horizontal support structures 1, multiple longitudinal support structures 2, multiple pre-embedded connectors 3, and multiple guardrail components 4.

[0026] See Figure 3 and Figure 4 The horizontal support structure 1 includes a horizontally arranged support plate 104, and a strip slot 102 is fixed at each end of the bottom surface of the support plate 104 along the length direction, and the strip slot 102 is arranged along the width direction of the support plate 104.

[0027] To increase the support strength of the support plate 104, an orthogonal reinforcing beam group 101 is provided on the bottom surface of the support plate 104. Specifically, the orthogonal reinforcing beam group 101 consists of five transverse reinforcing beams and eight longitudinal reinforcing beams, which are arranged in a perpendicular and intersecting manner. Specifically, the five transverse reinforcing beams are evenly spaced along the length of the support plate 104 and welded and fixed to the bottom surface of the support plate 104. The eight longitudinal reinforcing beams are evenly spaced along the width of the support plate 104 between each pair of adjacent transverse reinforcing beams and welded and fixed to the bottom surface of the support plate 104. Two longitudinal reinforcing beams are provided between each pair of adjacent transverse reinforcing beams.

[0028] In this embodiment, the radial section of the caisson 5 is rectangular. Correspondingly, the support plate 104 is a steel plate with a length × width × thickness of 1500mm × 1100mm × 20mm. The transverse and longitudinal reinforcing beams on its bottom surface used to form the orthogonal reinforcing beam 101 are both made of 10# channel steel. The length of the transverse reinforcing beam is 1100mm and the spacing between adjacent transverse reinforcing beams is 300mm. The length of the longitudinal reinforcing beam is 300mm and the spacing between adjacent longitudinal reinforcing beams is 500mm.

[0029] As a preferred technical solution of this embodiment, a lifting hole 106 for passing through a sling is provided on the plate surface near the four top corners of the support plate 104, so as to facilitate the lifting of the horizontal support structure 1 and facilitate the lifting and installation.

[0030] As another preferred technical solution in this embodiment, a plurality of positioning pins 105 are provided on the top surface of the support plate 104 to facilitate the subsequent positioning of the cantilever scaffolding erected on the horizontal support structure 1. In this embodiment, the positioning pins 105 are cylindrical steel structure pins with a length of 150mm and a diameter of 20mm; wherein, the spacing between adjacent positioning pins 105 in the length direction of the support plate 104 is adapted to the spacing between adjacent longitudinal steel pipes of the cantilever scaffolding in the length direction, and the spacing between adjacent positioning pins 105 in the width direction of the support plate 104 is adapted to the spacing between adjacent longitudinal steel pipes of the cantilever scaffolding in the width direction, so that when erecting the cantilever scaffolding, the erection position of the cantilever scaffolding can be positioned by fixing the bottom longitudinal steel pipe of the cantilever scaffolding onto the positioning pins 105.

[0031] In practical applications, multiple horizontal support structures 1 are connected sequentially in the horizontal direction with their long side edges attached to one side of the outer wall of the caisson 5, so as to form an outwardly extending horizontal platform on the outer wall of the caisson 5.

[0032] See Figure 5 The longitudinal support structure 2 is used to support and fix the bottom of the horizontal support structure 1. Specifically, it includes a triangular support frame, the top side of which is provided with a strip-shaped insert 201 that can mate with the strip-shaped slot 102; wherein,

[0033] The triangular support frame is composed of a transverse support beam 202, a first longitudinal support beam 204, and an oblique support beam 203 connected in sequence. A second longitudinal support beam 205 is also provided on the adjacent side of the triangular support frame. The second longitudinal support beam 205 is vertically spaced on the adjacent side of the first longitudinal support beam 204, and its top end is welded and fixed to the bottom surface of the transverse support beam 202. One end of the oblique support beam 203 is welded and fixed to the other end of the transverse support beam 202, and the other end is welded and fixed to the bottom side of the first longitudinal support beam 204.

[0034] Two strip-shaped inserts 201 are provided, which are arranged side by side along the length of the transverse support beam 202 and fixed on the top surface of the transverse support beam 202. The distance between the two is adapted to the distance between two adjacent strip slots 102 on the bottom surface of the two connected horizontal support structures 1, so that the longitudinal support structure 2 can form a plug-in connection with the two connected horizontal support structures 1 by inserting the two strip-shaped inserts 201 into the two adjacent strip slots 102 respectively. The dimensions of the strip-shaped inserts 201 are designed to be inserted and fixed in a way that allows for interference fit with the strip slots 102.

[0035] In this embodiment, the transverse support beam 202 of the triangular support frame is formed by welding two 12# I-beams together, and its length is 1100mm; the first longitudinal support beam 204 and the second longitudinal support beam 205 are both made of 18# I-beams, and their lengths are both 1100mm; the diagonal support beam 203 is also made of 18# I-beams, and its length is sufficient to be diagonally fixed between the transverse support beam 202 and the first longitudinal support beam 204; the strip insert 201 is a steel insert with a length × width × height of 960mm × 18mm × 38mm, and it is vertically welded and fixed to the top surface of the transverse support beam 202.

[0036] In practical applications, the number of longitudinal support structures 2 is the same as the number of horizontal support structures 1 plus 1, so that each pair of horizontal support structures 1 is connected by a longitudinal support structure 2. At the same time, a longitudinal support structure 2 is also connected to the side of the horizontal support structure 1 located at both ends of the horizontal platform. The longitudinal support structure 2 located at the end of the horizontal platform is connected to the strip slot 102 at the bottom of the horizontal support structure 1 by a single strip plate 201.

[0037] See Figure 6 The embedded component 3 includes an embedded steel plate 301, on one side of which a U-shaped frame 303 is vertically arranged and centrally welded and fixed, so that an insertion hole is formed between the U-shaped frame 303 and the embedded steel plate 301 for inserting the second longitudinal support beam 205; on the other side of the embedded steel plate 301, multiple embedded ribs 302 are evenly arranged, and one end of each embedded rib 302 is vertically welded and fixed to the embedded steel plate 301.

[0038] In this embodiment, the inner diameter of the insertion hole formed by the U-shaped frame 303 and the embedded steel plate 301 is 190mm×100mm, which is slightly larger than the outer diameter of the second longitudinal support beam 205; the tolerance between the thickness of the plate constituting the U-shaped frame 303 and the distance between the first longitudinal support beam 204 and the second longitudinal support beam 205 is 3mm~4mm; each embedded steel plate 301 is provided with 6 Φ10 embedded ribs 302; the embedded ribs 302 are J-shaped embedded ribs with one end bent, and their non-bent ends are welded and fixed to the embedded steel plate 301.

[0039] As a preferred technical solution in this embodiment, a 4mm thick rubber buffer layer 304 is covered on the inner wall of the side of the U-shaped frame 303 that is parallel to the surface of the pre-embedded steel plate 301 to increase the friction between the second longitudinal support beam 205 and the inner wall of the insertion hole and control the insertion speed of the second longitudinal support beam 205.

[0040] As another preferred technical solution in this embodiment, the bottom outer wall of the second longitudinal support beam 205 adjacent to the rubber buffer layer 304 is set as an inclined surface, so that the bottom outer diameter of the second longitudinal support beam 205 gradually decreases from top to bottom, so as to facilitate its insertion into the insertion hole of the pre-embedded component 3.

[0041] In practical applications, multiple embedded components 3 are divided into two parts, arranged and fixed in two groups, upper and lower, on the outer wall of the steel cage inside the caisson 5. Specifically, multiple embedded components 3 located on the upper side of the outer wall of the caisson 5 and multiple embedded components 3 located on the lower side of the outer wall of the caisson 5 are arranged at equal intervals on the outer wall of the steel cage, and are arranged in a one-to-one correspondence between the upper and lower parts. The vertical spacing of adjacent embedded components 3 is set to 500mm, and the horizontal spacing of adjacent embedded components 3 is set to 1500mm. Each embedded component 3 is fixed by its insertion hole in a vertically penetrating manner. The second longitudinal support beam 205 of each longitudinal support structure 2 is inserted into the insertion holes of the upper and lower embedded components 3 at the corresponding positions from top to bottom.

[0042] See Figure 7 The guardrail assembly 4 includes a guardrail 403, which is vertically fixed to the long edge of the other side of the support plate 104; multiple connecting blocks are welded and fixed from top to bottom on both sides of the guardrail 403, and each connecting block has multiple first screw holes opened along the direction perpendicular to the plane of the guardrail 403; each guardrail assembly 4 also includes one or two connecting posts, each connecting post including a column 401 and two strip connecting plates 402; wherein, the column 401 is made of I-beam, and its length is adapted to the height of the guardrail 403; the two strip connecting plates 402 are vertically fixed... The connecting plates 402 are set up and welded to the left and right edges of the end plate on one side of the I-beam respectively; each connecting plate 402 has multiple second screw holes spaced apart from top to bottom, and the multiple second screw holes are set in a one-to-one correspondence with multiple first screw holes, so that the two guardrails 403 are fixedly connected by bolts passing through the through screw holes on the opposite connecting blocks and connecting plates 402; on the multiple guardrails 403 connected in sequence, the outer edges of the guardrails 403 at both ends are also connected with connecting posts to increase the connection strength between the guardrails 403 and the support plate 104.

[0043] Each column 402 is horizontally fixed to the base plate at its bottom end, and the base plate has symmetrical connecting holes on both sides. Correspondingly, two guardrail reserved holes 103 are also symmetrically opened on both sides of the long edge of the other side of the support plate 104. The two holes correspond to the connecting holes on the base plate on both sides of the guardrail 403 above them and are fixedly connected by bolts, so that the guardrail 403 is fixed on the long edge of the other side of the support plate 104.

[0044] In practical applications, the number of guardrail components 4 is the same as the number of support plates 104, and they are respectively set on the long edge of each support plate 104 on the side away from the caisson 5.

[0045] See Figure 1-2 The specific usage method of the prefabricated cantilever support platform for caisson construction is described below.

[0046] S1. Based on the actual construction of the caisson, determine the dimensions of the horizontal support structure 1, the longitudinal support structure 2, the embedded components 3, and the guardrail components 4, and perform pre-processing.

[0047] S2. Before the caisson 5 is poured, each pre-embedded component 3 is fixed on the outer side of its steel cage. Specifically, each pre-embedded component is fixedly connected by welding its pre-embedded reinforcement 302 steel cage, and the pre-embedded steel plate 301 is set at a position flush with the outer wall of the side wall of the caisson 5 after pouring, so that the pre-embedded steel plate 301 and the pre-embedded reinforcement 302 of the pre-embedded component 3 are integrated with the concrete pouring.

[0048] S3. After the concrete strength of the caisson 5 meets the requirements, each longitudinal support structure 2 is hoisted in sequence so that it is vertically inserted into the upper and lower pre-embedded component 3 at the corresponding position through the second longitudinal support beam 205, so as to fix the position of the longitudinal support structure 2 by means of the socket connection.

[0049] S4. The horizontal support structure 1 is hoisted and fixed by the strip slot 102 provided on the bottom surface of its support plate 104 and the top side plate 201 of the longitudinal support structure 2 at the corresponding position, so as to ensure that the horizontal support structure 1 is fixed on the side wall adjacent to the caisson 5.

[0050] S5. Each guardrail component 4 is hoisted sequentially on the outer edge of the horizontal support structure 1. Specifically, the construction personnel first fix each connecting post to the support plate 104 through the base plate on the laid horizontal platform, and then fix the guardrail plate 403 to the connecting post with bolts to complete the installation of the overall guardrail components.

[0051] S6. Erecting cantilevered scaffolding: Specifically, each upright of the cantilevered scaffolding is fitted onto the positioning pin 105 on the support plate 104 to position the cantilevered scaffolding and prevent planar displacement of the cantilevered scaffolding.

[0052] S7. After the next layer of the caisson is completed, the cantilevered scaffolding and support platform shall be dismantled in sequence. The dismantling order of the support platform is guardrail component 4, horizontal support structure 1 and longitudinal support structure 2, and it can be reused next time; the pre-embedded component 3 is a one-time pre-embedded material and will not be dismantled.

[0053] In summary, the prefabricated cantilever support platform for caisson construction is easy to disassemble, and the entire on-site installation process requires no welding or cutting, achieving non-destructive connection and dismantling. According to finite element simulation and engineering measurements, compared with the existing cantilever support platform method on the inside of the caisson, the prefabricated cantilever support platform for caisson construction has a 40% increase in bending stiffness and a 60% increase in installation efficiency. In addition, most of the components can be recycled, and the entire assembly system is reliable in quality and highly efficient.

Claims

1. A prefabricated cantilever support platform for caisson construction, characterized in that, It consists of multiple horizontal support structures (1), multiple longitudinal support structures (2), and multiple embedded components (3); among which, The horizontal support structure (1) includes a horizontally arranged support plate (104), on which an orthogonal reinforcing beam group (101) is laid on the bottom surface; a strip slot (102) is fixed at each end of the bottom surface in the length direction of the support plate (104), and the strip slot (102) is arranged along the width direction of the support plate (104); The longitudinal support structure (2) includes a triangular support frame, on the top side of which are provided two strip plates (201) that can cooperate with the strip slot (102). The strip plates (201) cooperate with the strip slot (102) to insert and connect a single support plate (104) to the longitudinal support structure (2), or to insert and connect two support plates (104) to the longitudinal support structure (2) at the same time to achieve splicing; a second longitudinal support beam (205) is provided on the triangular support frame; The embedded component (3) includes an embedded steel plate (301), on one side of which a U-shaped frame (303) is fixed to form an insertion hole that cooperates with the second longitudinal support beam (205); multiple embedded ribs (302) are evenly and vertically arranged on the other side of the embedded steel plate (301).

2. The prefabricated cantilever support platform for caisson construction according to claim 1, characterized in that, The orthogonal reinforcing beam group (101) consists of multiple transverse reinforcing beams and longitudinal reinforcing beams arranged in a vertically intersecting manner; the multiple transverse reinforcing beams are arranged at equal intervals along the length direction of the support plate (104) and fixed on the bottom surface of the support plate (104); the multiple longitudinal reinforcing beams are arranged at equal intervals along the width direction of the support plate (104) between adjacent transverse reinforcing beams, and the beam wall of each longitudinal reinforcing beam is fixed on the bottom surface of the support plate (104), and its two ends abut against and are fixed on the adjacent transverse reinforcing beam.

3. The prefabricated cantilever support platform for caisson construction according to claim 1, characterized in that, The triangular support frame is composed of a transverse support beam (202), a first longitudinal support beam (204), and an oblique support beam (203) connected and fixed in sequence; the second longitudinal support beam (205) is vertically spaced on the side adjacent to the first longitudinal support beam (204), and its top is fixed to the transverse support beam (202).

4. The prefabricated cantilever support platform for caisson construction according to claim 3, characterized in that, The bottom outer wall of the second longitudinal support beam (205) adjacent to the rubber buffer layer (304) is set as an inclined surface, so that the bottom outer diameter of the second longitudinal support beam (205) gradually decreases from top to bottom.

5. The prefabricated cantilever support platform for caisson construction according to claim 1, characterized in that, Each horizontal support structure (1) is provided with a guardrail assembly (4), which includes a guardrail (403) and a connecting post; multiple connecting blocks are fixed from top to bottom on the left and right sides of the guardrail (403), and each connecting block has a screw hole; the connecting post includes a column (401) and two strip connecting plates (402); the two strip connecting plates (402) are set vertically and fixed on the left and right edges of the column (401); multiple screw holes are spaced from top to bottom on each connecting plate (402), and are set in a one-to-one correspondence with the screw holes on the multiple connecting blocks, so that the two guardrails (403) are fixedly connected by bolts passing through the connecting blocks and connecting plates (402) that are connected to each other; a connecting post is also connected to the outer edge of the guardrail (403) located on the end side.

6. The prefabricated cantilever support platform for caisson construction according to claim 4, characterized in that, Each column (401) has a base plate fixed horizontally at its bottom end, and the base plate has symmetrical connecting holes on both sides; correspondingly, two guardrail reserved holes (103) are symmetrically opened on both sides of the long edge of the other side of the support plate (104), so that the guardrail (403) is fixedly connected by bolts passing through the connecting holes and the guardrail reserved holes (103).

7. The prefabricated cantilever support platform for caisson construction according to claim 1, characterized in that, Multiple lifting holes (106) for threading slings are evenly distributed along the circumference on the support plate (104).

8. The prefabricated cantilever support platform for caisson construction according to claim 1, characterized in that, Multiple positioning pins (105) are provided on the top surface of the support plate (104). The spacing between adjacent positioning pins (105) in the length and width directions of the support plate (104) is adapted to the spacing between adjacent longitudinal steel pipes at the bottom of the cantilever scaffold to be erected in the length and width directions, respectively, so as to achieve positioning by fitting the bottom end of the longitudinal steel pipe onto the positioning pin (105).

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