Steel-concrete composite caisson structure

Abstract

The utility model relates to a well structure technical field especially relates to a kind of steel concrete composite well structure.Its technical scheme includes concrete cylinder, further include the multiple steel cylinders of detachable installation on concrete cylinder, detachably connected between adjacent two steel cylinders, the protruding block is equipped on the concrete cylinder, the recess is equipped in one end of the steel cylinder, the convex ring is equipped in the other end, the protruding block is combined with recess and is connected by connecting component, the connecting component includes connecting rod, bolt on connecting rod, telescopic assembly is installed in one end of connecting rod, and the diameter size of connecting rod end portion is controlled by telescopic assembly.The invention can reduce the dead weight of well structure, be applicable to soft soil area well sinking sudden sinking control, steel well part can be recycled after pipe jacking construction is completed, reduce carbon emission, and it is an environment-friendly structure.

Description

Technical Field

[0001] This utility model relates to the field of caisson structure technology, and in particular to a steel-concrete composite caisson structure. Background Technology

[0002] A caisson is a structural form of pipe jacking shaft. First, a well-shaped structure is constructed on the ground. Then, enclosed by the well walls, soil is continuously excavated from within the well. Under its own weight and the load from above, the caisson gradually sinks, overcoming the lateral resistance between the well walls and the soil layer, as well as the frontal resistance at the cutting edge. As the well sinks, the well walls are extended accordingly on the ground. This process is repeated until the designed depth and elevation are reached. Afterward, the bottom is sealed, and pipe jacking begins. Once pipe jacking is complete, the caisson structure must be dismantled.

[0003] Existing caisson structures all use reinforced concrete structures, which have insufficient performance. Traditional all-concrete caissons weigh 18-25 t / m3, resulting in a 12% accident rate of sudden subsidence in soft soil strata. Construction efficiency is low, and the curing of a single section of the caisson requires 7-10 days, extending the overall construction period by more than 30%. After the pipe jacking is completed, the demolition will cause significant environmental pollution, generating 2.5-3.8 t / m3 of construction waste and 410 kg / m3 of CO2 emissions. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a steel-concrete composite caisson structure that can reduce the self-weight of the caisson structure, is suitable for controlling the sinking and sudden sinking of caissons in soft soil areas, and allows the steel caisson part to be recycled after the pipe jacking construction is completed, thereby reducing carbon emissions.

[0005] The technical solution of this utility model: a steel-concrete composite caisson structure, including a concrete cylinder, and further comprising:

[0006] Multiple steel cylinders that can be detachably installed on a concrete cylinder, with detachable connections between adjacent steel cylinders;

[0007] The concrete cylinder is provided with a protrusion, and one end of the steel cylinder is provided with a groove, and the other end is provided with a protruding ring. The protrusion and the groove are combined and connected by a connecting component.

[0008] The connecting component includes a connecting rod, a bolt threaded onto the connecting rod, and a scaling component installed at one end of the connecting rod, wherein the scaling component controls the diameter of the end of the connecting rod.

[0009] Optionally, the scaling component includes a mounting base fixedly mounted on a connecting rod, a plurality of positioning rods rotatably mounted on the mounting base, support rods rotatably mounted on the positioning rods, and a drive seat rotatably mounted on the plurality of support rods.

[0010] Optionally, the scaling assembly further includes a drive rod rotatably mounted on the drive base, the drive rod being located inside the connecting rod and threadedly connected, and a drive head being fixedly mounted at one end of the drive rod.

[0011] Optionally, the drive rod passes through the mounting base and the connecting rod, and both the mounting base and the connecting rod have through holes in the middle to allow the drive rod to pass through, the inner diameter of the through holes being larger than the outer diameter of the drive rod.

[0012] Optionally, the connecting rod is provided with a snap-fit ​​connector, and the connecting rod is provided with a slot for accommodating the drive head. One end of the slot is detachably fitted with a sealing head for sealing the slot.

[0013] Optionally, the protrusion is provided with a plurality of first connecting holes, the groove is provided with a plurality of second connecting holes, and the protruding ring is provided with a plurality of third connecting holes.

[0014] Optionally, both ends of the second connecting hole are provided with countersunk holes, and the bolt and the scaling component are respectively located inside the two countersunk holes.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This invention can reduce the self-weight of the caisson structure and is suitable for controlling the sinking and sudden sinking of caissons in soft soil areas. After the pipe jacking construction is completed, the steel caisson part can be recycled, reducing carbon emissions. It is an environmentally friendly structure. Attached Figure Description

[0017] Figure 1 Schematic diagram of a steel-concrete composite caisson structure Figure 1 ;

[0018] Figure 2 Schematic diagram of a steel-concrete composite caisson structure Figure 2 ;

[0019] Figure 3 A schematic diagram showing the connection between the concrete cylinder and the steel cylinder;

[0020] Figure 4 for Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 5 Schematic diagram of the connecting components Figure 1 ;

[0022] Figure 6 Schematic diagram of the connecting components Figure 2 .

[0023] Reference numerals: 1. Concrete cylinder; 101. Protrusion; 102. First connecting hole; 2. Steel cylinder; 201. Groove; 202. Protruding ring; 203. Second connecting hole; 204. Third connecting hole; 205. Countersunk hole; 3. Connecting component; 301. Connecting rod; 302. Bolt; 303. Mounting base; 304. Positioning rod; 305. Support rod; 306. Drive seat; 307. Drive rod; 308. Drive head; 309. Snap connector; 310. Sealing head. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] like Figures 1 to 3 As shown, the present invention proposes a steel-concrete composite caisson structure, including a concrete cylinder 1 and multiple steel cylinders 2 that are detachably installed on the concrete cylinder 1. Adjacent steel cylinders 2 are detachably connected. The bottom of the caisson adopts a reinforced concrete structure, i.e., the concrete cylinder 1, which is convenient for sealing with the bottom concrete and the bottom slab. The remaining part adopts a steel structure caisson, i.e., the steel cylinder 2, which is convenient for later dismantling, recycling and reuse.

[0026] Furthermore, the concrete cylinder 1 is provided with a protrusion 101, and one end of the steel cylinder 2 is provided with a groove 201 and the other end is provided with a protruding ring 202. The protrusion 101 and the groove 201 are combined and connected by the connecting component 3. Through the cooperation of the groove 201 and the protrusion 101, and through the fixing by the connecting component 3, a composite connection of "mortise and tenon joint + tie bolt control" can be achieved, which can realize the precise joint of steel caisson and concrete caisson, thereby achieving the purpose of controlling the risk of sudden sinking of caisson in soft soil strata, reducing carbon emissions, and improving construction speed.

[0027] The protrusion 101 is provided with multiple first connecting holes 102, the groove 201 is provided with multiple second connecting holes 203, and the protruding ring 202 is provided with multiple third connecting holes 204. When the steel cylinder 2 and the concrete cylinder 1 are connected, the protrusion 101 and the groove 201 are connected, and the first connecting holes 102 and the second connecting holes 203 are adjusted to the coaxial position. Then the connecting component 3 can be inserted into the first connecting holes 102 and the second connecting holes 203 to complete the connection between the concrete cylinder 1 and the steel cylinder 2.

[0028] When connecting two steel cylinders 2, the convex ring 202 is engaged with the groove 201, the second connecting hole 203 and the third connecting hole 204 are adjusted to a coaxial position, and the connecting part 3 is inserted into the second connecting hole 203 and the third connecting hole 204 to complete the fixing.

[0029] like Figures 4 to 6 As shown, in this embodiment, the connecting component 3 includes a connecting rod 301, a bolt 302 threaded onto the connecting rod 301, and a scaling component installed at one end of the connecting rod 301. The scaling component controls the diameter of the end of the connecting rod 301. When fixing the concrete cylinder 1 and the steel cylinder 2 or two steel cylinders 2, the connecting rod 301 needs to pass through the concrete cylinder 1 and the steel cylinder 2, and a nut is set inside the cylinder. The connecting rod 301 can be rotated to tighten and fix the cylinder. At this time, during the connection, workers need to stand inside the caisson. However, the caisson is deep, which increases the working danger of the workers. The scaling component can expand the connecting rod 301 after passing through the concrete cylinder 1 and the steel cylinder 2, so that the connecting rod 301 can abut against the inside of the steel cylinder 2.

[0030] Furthermore, the scaling component includes a mounting base 303 fixedly mounted on the connecting rod 301. Multiple positioning rods 304 are rotatably mounted on the mounting base 303. Support rods 305 are rotatably mounted on the positioning rods 304. A drive seat 306 is rotatably mounted on the multiple support rods 305. When the drive seat 306 moves axially along the connecting rod 301, it will drive the positioning rods 304 and support rods 305 to rotate synchronously. The rotated positioning rods 304 and support rods 305 can then expand or contract, allowing the connecting rod 301 to pass through the first connecting hole 102, the second connecting hole 203, and the third connecting hole 204, and abut against the inner wall of the steel cylinder 2.

[0031] In this embodiment, the scaling component also includes a drive rod 307 rotatably mounted on the drive seat 306. The drive rod 307 is located inside the connecting rod 301 and is threadedly connected. One end of the drive rod 307 is fixedly mounted with a drive head 308. By rotating the drive head 308, the drive rod 307 can be rotated, thereby causing the drive rod 307 to move axially, which in turn causes the drive seat 306 to move. Furthermore, the self-locking property of the thread can prevent the positioning rod 304 and the support rod 305 from becoming loose.

[0032] It is worth noting that the drive rod 307 passes through the mounting base 303 and the connecting rod 301. The mounting base 303 and the connecting rod 301 are both provided with through holes in the middle to allow the drive rod 307 to pass through. The inner diameter of the through hole is larger than the outer diameter of the drive rod 307, which can effectively reduce the resistance encountered when rotating the drive rod 307.

[0033] In this embodiment, the connecting rod 301 is provided with a snap-fit ​​connector 309, which can be used to fix the connecting rod 301. When the scaling component is expanded, it can be snapped onto the snap-fit ​​connector 309 with a wrench. By turning the bolt 302 with a wrench, the distance between the bolt 302 and the scaling component can be reduced, and tightening can be performed to complete the fixed connection. The connecting rod 301 is provided with a slot for accommodating the drive head 308. One end of the slot is detachably equipped with a sealing head 310 to seal the slot. The sealing head 310 can effectively prevent the drive rod 307 from being accidentally touched, ensuring the stability of the positioning rod 304 and the support rod 305.

[0034] The second connecting hole 203 has countersunk holes 205 at both ends. The bolt 302 and the scaling component are located inside the two countersunk holes 205 respectively. The countersunk holes can prevent the two sides of the connecting rod 301 from protruding from the steel cylinder 2.

[0035] In this embodiment, the combination of groove 201 and protrusion 101 and the fixing by connecting component 3 can realize the composite connection of "mortise and tenon joint + tie bolt control", which can realize the precise joint of steel caisson and concrete caisson, thereby achieving the purpose of controlling the risk of sudden sinking of caisson in soft soil layer, reducing carbon emissions and improving construction speed.

[0036] When the drive seat 306 moves axially along the connecting rod 301, it will drive the positioning rod 304 and the support rod 305 to rotate synchronously. The rotated positioning rod 304 and support rod 305 can expand or contract, so that the connecting rod 301 can pass through the first connecting hole 102, the second connecting hole 203 and the third connecting hole 204 and abut against the inner wall of the steel cylinder 2. By turning the bolt 302 with a wrench, the distance between the bolt 302 and the scaling component can be reduced, and tightening can be performed to complete the fixed connection.

[0037] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A steel-concrete composite caisson structure, comprising a concrete cylinder (1), characterized in that, Also includes: Multiple steel cylinders (2) are detachably installed on a concrete cylinder (1), and adjacent steel cylinders (2) are detachably connected; The concrete cylinder (1) is provided with a protrusion (101), and the steel cylinder (2) is provided with a groove (201) at one end and a protruding ring (202) at the other end. The protrusion (101) and the groove (201) are combined and connected by a connecting component (3). The connecting component (3) includes a connecting rod (301), a bolt (302) threaded onto the connecting rod (301), and a scaling component installed at one end of the connecting rod (301), the scaling component controlling the diameter of the end of the connecting rod (301).

2. The steel-concrete composite caisson structure according to claim 1, characterized in that, The scaling component includes a mounting base (303) fixedly mounted on a connecting rod (301), a plurality of positioning rods (304) rotatably mounted on the mounting base (303), a support rod (305) rotatably mounted on the positioning rods (304), and a drive seat (306) rotatably mounted on the plurality of support rods (305).

3. The steel-concrete composite caisson structure according to claim 2, characterized in that, The scaling assembly also includes a drive rod (307) rotatably mounted on a drive base (306). The drive rod (307) is located inside the connecting rod (301) and threadedly connected. A drive head (308) is fixedly mounted on one end of the drive rod (307).

4. The steel-concrete composite caisson structure according to claim 3, characterized in that, The drive rod (307) passes through the mounting base (303) and the connecting rod (301). The mounting base (303) and the connecting rod (301) are both provided with through holes in the middle to allow the drive rod (307) to pass through. The inner diameter of the through hole is larger than the outer diameter of the drive rod (307).

5. A steel-concrete composite caisson structure according to claim 4, characterized in that, The connecting rod (301) is provided with a snap connector (309), and the connecting rod (301) is provided with a slot for accommodating the drive head (308). One end of the slot is detachably fitted with a sealing head (310) for sealing the slot.

6. A steel-concrete composite caisson structure according to claim 5, characterized in that, The protrusion (101) is provided with a plurality of first connecting holes (102), the groove (201) is provided with a plurality of second connecting holes (203), and the protruding ring (202) is provided with a plurality of third connecting holes (204).

7. A steel-concrete composite caisson structure according to claim 6, characterized in that, The second connecting hole (203) has countersunk holes (205) at both ends, and the bolt (302) and the scaling component are located inside the two countersunk holes (205) respectively.

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