Joint splicing structure for temporary steel casing of miniature jacking pipe

Abstract

The utility model discloses a miniature pipe jacking temporary steel casing joint splicing structure which is used for two sections of steel casings which are adjacent up and down and are coaxial. Comprising an upper clamping steel ring and a lower clamping steel ring. The outer wall of the upper clamping steel ring is welded to the inner wall of the upper steel casing through an upper welding seam, and the bottom end of the upper welding seam is flush with the joint of the upper steel casing and the lower steel casing. The lower clamping steel ring comprises a horizontal part and a vertical part which is integrally arranged upwards at the radial inner end of the horizontal part, and the vertical sections of the horizontal part and the vertical part are L-shaped; a slot is defined between the lower clamping steel ring and the lower steel casing, and the upper clamping steel ring is matched with the slot and inserted into the slot bottom of the slot; and a rubber water stop ring is pressed between the horizontal parts of the upper clamping steel ring and the lower clamping steel ring. On-site welding is not needed, on-site assembling efficiency is improved, the rubber water stop ring is flexible and good in elasticity, and compared with sealing depending on a welding structure at a seam, structural deformation caused by external force can be better resisted, and the good sealing condition can be better kept under the external force.

Description

TECHNICAL FIELD

[0001] The utility model relates to waterproof technology of steel casing joint in pipe jacking construction technology. BACKGROUND

[0002] Miniature pipe jacking technology is also called "secondary construction method" (i.e. ground arrow method), which is a kind of technology for laying pipes underground, and it is a relatively complex construction technology combined with steel casing work well. Taking the sewage and rainwater engineering of Zhengdong New Area Longhu Financial Island Outer Ring Road and radial branch engineering in Zhengzhou City as the research object, the construction technology of steel casing work well under the present miniature pipe jacking is introduced.

[0003] The prior art adopts a vertical pit type pipe shaking machine to shake and construct a steel cylinder well (formed by connecting upper and lower steel casings) with a size of Φ2590 mm (millimeters) to be buried underground, the steel cylinder wall thickness is 20 mm, and the height of each section is 2 m (meters). Figure 1 and Figure 2 As shown, the two steel casings are connected and fixed and reinforced by steel welding, and the bottom is poured with concrete to seal the bottom.

[0004] This existing steel casing joint structure is prone to deformation and leakage at the joint during jacking construction due to high surrounding groundwater level and large soil pressure. Since welding is required on site, the steel casing splicing efficiency at the construction site is low. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of temporary steel casing joint splicing structure of miniature pipe jacking, without welding on site, with high on-site splicing efficiency, and good sealing at the steel casing joint.

[0006] To achieve the above purpose, the utility model provides a kind of temporary steel casing joint splicing structure of miniature pipe jacking, for two steel casings adjacent to each other and coaxial; one steel casing in the two adjacent steel casings located relatively above is called upper steel casing, and the other steel casing is called lower steel casing;

[0007] It includes an upper clamping steel ring welded with the upper steel casing and a lower clamping steel ring welded with the lower steel casing;

[0008] The upper clamping steel ring is in the shape of a cylinder, and the outer wall of the upper clamping steel ring is welded with the inner wall of the upper steel casing through an upper weld, the bottom end of the upper weld is flush with the joint of the upper steel casing and the lower steel casing, and the upper clamping steel ring below the joint forms a clamping part;

[0009] The lower clamping steel ring comprises a horizontal part and a vertical part integrally arranged upward at a radially inner end of the horizontal part, and the vertical section of the horizontal part and the vertical part is L-shaped; the lower clamping steel ring and the lower steel casing form a slot, the upper clamping steel ring is matched with the slot and is inserted into the bottom of the slot; and the rubber waterstop is arranged between the upper clamping steel ring and the horizontal part of the lower clamping steel ring.

[0010] The upper clamping steel ring is provided with an upper steel plate at the top, the upper steel plate is welded with the inner wall of the upper steel casing; the lower clamping steel ring is provided with a lower steel plate at the bottom, the lower steel plate is welded with the inner wall of the lower steel casing, and the upper steel plate and the lower steel plate are penetrated by a compression bolt for compression, the compression bolt is upwardly extended out of the upper steel plate and is threadedly connected with an upper nut, and the compression bolt is downwardly extended out of the lower steel plate and is threadedly connected with a lower nut.

[0011] The upper steel plate, the lower steel plate, the compression bolt, the upper nut and the lower nut form a set of compression devices for compressing the upper clamping steel ring and the lower clamping steel ring, and a plurality of sets of the compression devices are uniformly arranged along the circumference with the axis of the upper steel casing and the lower steel casing as the center.

[0012] In each set of the compression devices, the top end of the radially outer side of the upper steel plate is upwardly connected with an upper reinforcing rib plate, and the bottom end of the radially outer side of the lower steel plate is downwardly connected with a lower reinforcing rib plate, and the upper reinforcing rib plate and the lower reinforcing rib plate are welded with the inner wall of the upper steel casing.

[0013] The utility model has the advantages of:

[0014] In the prior art, the upper steel casing and the lower steel casing are sealed by welding at the joint, which not only has low field operation efficiency, but also has low ability to resist disturbance force and uneven earth pressure formed by construction vibration, and the joint between the upper and lower adjacent steel casings is prone to water leakage in the later pipe jacking construction. Figure 2

[0015] In comparison, the utility model does not weld at the joint between the upper steel casing and the lower steel casing, which greatly improves the field assembly efficiency, and the rubber waterstop has good sealing effect after being compressed between the upper clamping steel ring and the lower clamping steel ring. The rubber waterstop is flexible and has good elasticity, and can better resist structural deformation caused by external force, and can better maintain good sealing condition under the action of external force.

[0016] ​The pressing device has two technical effects, the first one is that after the upper nut and the lower nut are tightened, the upper steel plate and the lower steel plate have a downward deformation trend, thereby extruding the upper clamping steel ring downward and extruding the lower clamping steel ring upward, and then the upper clamping steel ring and the lower clamping steel ring press the rubber waterstop ring, so that the rubber waterstop ring ensures a good sealing effect under the extrusion force, and water cannot penetrate into the inside of the steel casing through the rubber waterstop ring. The second technical effect of the pressing device is that after the upper nut and the lower nut of each group of pressing devices are tightened, the upper steel casing and the lower steel casing form a more solid integrated structure, which can better resist external forces such as soil pressure or vibration disturbance forces during construction, and is less likely to be dislocated or deformed under the action of external forces, thereby enhancing the sealing performance of the utility model.

[0017] The upper and lower reinforcing rib plates play a role in structural reinforcement, and also form a better integrated force structure between each group of pressing devices and the upper and lower steel casings, thereby not only enhancing the structural strength, but also further improving the ability of the utility model to resist external forces (such as construction vibration disturbance forces) and prevent structural deformation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a state diagram of workers assembling and welding the joints of two adjacent steel casings in the prior art.

[0019] Figure 2 is a state diagram of the joints of two adjacent steel casings in the prior art being deformed and leaking.

[0020] Figure 3 is a schematic diagram of the planar cross-sectional structure of the utility model.

[0021] Figure 4 is Figure 3 A-A sectional view of DETAILED DESCRIPTION

[0022] As shown in Figure 3 and Figure 4 , the utility model provides a kind of micro pipe jacking temporary steel casing joint assembly structure, for two section steel casings adjacent and coaxial;Two section steel casings adjacent and located relatively upper one is called upper steel casing 1, and another steel casing is called lower steel casing 2;

[0023] It includes upper clamping steel ring 4 welded with upper steel casing 1 and lower clamping steel ring 3 welded with lower steel casing 2;

[0024] Upper clamping steel ring 4 is cylindrical, and the outer wall of upper clamping steel ring 4 is welded with the inner wall of upper steel casing 1 by upper weld 5, and the bottom end of upper weld 5 is flush with the joint 6 of upper steel casing 1 and lower steel casing 2, and the upper clamping steel ring 4 below the joint 6 forms a clamping part;

[0025] The lower retaining steel ring 3 includes a horizontal portion and a vertical portion integrally formed upwards at the radially inner end of the horizontal portion. The vertical cross-sections of the horizontal portion and the vertical portion are oriented as follows: Figure 4 The L-shape shown; a slot is formed between the lower locking steel ring 3 and the lower steel sleeve 2, and the locking part of the upper locking steel ring 4 matches the slot and is inserted into the bottom of the slot; a rubber waterstop ring 7 is pressed between the horizontal parts of the upper locking steel ring 4 and the lower locking steel ring 3.

[0026] In existing technology, the sealing between adjacent upper steel casing 1 and lower steel casing 2 relies on welding at the joint 6. This not only results in low on-site work efficiency but also has a low ability to resist the disturbance force generated by construction vibration and uneven soil pressure. In the later stages of pipe jacking construction, the joint 6 between the two adjacent steel casing sections is prone to... Figure 2 The image shows a water leakage phenomenon.

[0027] In contrast, this invention eliminates the need for welding at the joint 6 between the upper steel casing 1 and the lower steel casing 2, significantly improving on-site assembly efficiency. Furthermore, the rubber waterstop 7, when compressed between the upper clamping steel ring 4 and the lower clamping steel ring 3, provides excellent sealing. The rubber waterstop 7 is flexible and possesses good elasticity; compared to relying on a welded structure at the joint 6 for sealing, it is more resistant to structural deformation caused by external forces and maintains a better seal under external pressure.

[0028] The upper clamping steel ring 4 has an upper steel plate 8 pressed on top, and the upper steel plate 8 is welded to the inner wall of the upper steel casing 1; the lower clamping steel ring 3 has a lower steel plate 9 pressed on bottom, and the lower steel plate 9 is welded to the inner wall of the lower steel casing 2; a clamping bolt 10 for clamping is passed between the upper steel plate 8 and the lower steel plate 9; the top of the clamping bolt 10 extends upward from the upper steel plate 8 and is threaded with an upper nut 11; the bottom of the clamping bolt 10 extends downward from the lower steel plate 9 and is threaded with a lower nut 12.

[0029] The upper steel plate 8, the lower steel plate 9, the clamping bolt 10, the upper nut 11 and the lower nut 12 form a clamping device for clamping the upper clamping steel ring 4 and the lower clamping steel ring 3. The clamping device is evenly arranged in multiple sets along the circumference with the axis of the upper steel casing 1 and the lower steel casing 2 as the center.

[0030] The pressing device has two technical effects, the first one is that after the upper nut 11 and the lower nut 12 are tightened, the upper steel plate 8 and the lower steel plate 9 have a downward deformation trend, thereby extruding the upper clamping steel ring 4 downward and the lower clamping steel ring 3 upward, and further extruding the upper clamping steel ring 4 and the lower clamping steel ring 3 to press the rubber waterstop 7, so that the rubber waterstop 7 ensures a good sealing effect under the extrusion force, and water cannot penetrate into the inside of the steel casing through the rubber waterstop 7. The second technical effect of the pressing device is that after the upper nut 11 and the lower nut 12 of each group of pressing devices are tightened, the upper steel casing 1 and the lower steel casing 2 form a more solid integrated structure, which can better resist external forces such as soil pressure or vibration disturbance forces during construction, and is less likely to be dislocated or deformed under the action of external forces, thereby enhancing the sealing performance of the utility model.

[0031] The top end of the radial outer side of the upper steel plate 8 is connected upward with an upper reinforcing rib plate 13, and the bottom end of the radial outer side of the lower steel plate 9 is connected downward with a lower reinforcing rib plate 14, and the upper reinforcing rib plate 13 and the lower reinforcing rib plate 14 are welded with the inner wall of the upper steel casing 1.

[0032] The upper reinforcing rib plate 13 and the lower reinforcing rib plate 14 play a role in structural reinforcement, and also form a better integrated force structure between each group of pressing devices and the upper steel casing 1 and the lower steel casing 2, thereby not only enhancing the structural strength, but also further improving the ability of the utility model to resist external forces (such as construction vibration disturbance forces) and prevent structural deformation

[0033] In use, the utility model is installed between two adjacent steel casings. In the preparation stage before construction, the upper clamping steel ring 4, the upper steel plate 8 and the upper reinforcing rib plate 13 of each group of pressing devices are welded at the bottom end of the steel casing used for construction; and the lower clamping steel ring 3, the lower steel plate 9 and the lower reinforcing rib plate 14 of each group of pressing devices are welded at the top end of the steel casing used for construction. At the construction site, only the steel casings need to be lowered in turn, and when a new section of steel casing (the upper steel casing 1) is sinking, the upper clamping steel ring 4 is inserted into the insertion slot of the lower adjacent section of steel casing (the lower steel casing 2), so as to press the rubber waterstop 7, thereby preventing water from leaking into the inside of the steel casing at the joint 6 between the two adjacent steel casings through the rubber waterstop 7. Then the pressing bolt 10 is arranged between the upper steel plate 8 and the lower steel plate 9 of each group of pressing devices, and the upper nut 11 and the lower nut 12 are tightened at the top and bottom of the pressing bolt 10, thereby completing the assembly and waterproofing work of the two sections of steel casings. Since welding is no longer required on site, the work efficiency at the construction site is greatly improved, and the waterproofing performance is greatly improved compared with the past.

[0034] The above examples are only used to illustrate but not to limit the technical solutions of the present application. Although the present application is described in detail with reference to the above examples, it should be understood by those skilled in the art that the present application can still be modified or equivalently replaced without departing from the spirit and scope of the present application, and any modification or partial replacement should be covered in the scope of the claims of the present application.

Claims

1. A micro-tube temporary steel casing joint splicing structure for two adjacent and coaxial steel casings, wherein the steel casing located on the opposite upper side is referred to as the upper steel casing, and the other steel casing is referred to as the lower steel casing, characterized in that: it comprises an upper clamping steel ring welded with the upper steel casing and a lower clamping steel ring welded with the lower steel casing; the upper clamping steel ring is cylindrical, and the outer wall of the upper clamping steel ring is welded with the inner wall of the upper steel casing through an upper weld, the bottom end of the upper weld is flush with the joint between the upper steel casing and the lower steel casing, and the upper clamping steel ring below the joint forms a clamping part; the lower clamping steel ring comprises a horizontal part and a vertical part integrally provided upward at the radial inner end of the horizontal part, and the vertical section of the horizontal part and the vertical part is L-shaped; a slot is formed between the lower clamping steel ring and the lower steel casing, the upper clamping steel ring is matched with the slot and inserted into the bottom of the slot, and a rubber water stop ring is arranged between the upper clamping steel ring and the horizontal part of the lower clamping steel ring. An upper steel plate is arranged on the top of the upper clamping steel ring, and the upper steel plate is welded with the inner wall of the upper steel casing; a lower steel plate is arranged on the bottom of the lower clamping steel ring, and the lower steel plate is welded with the inner wall of the lower steel casing, a compression bolt is arranged between the upper steel plate and the lower steel plate for compression, the top of the compression bolt extends upward out of the upper steel plate and is threadedly connected with an upper nut, and the bottom of the compression bolt extends downward out of the lower steel plate and is threadedly connected with a lower nut; the upper steel plate, the lower steel plate, the compression bolt, the upper nut and the lower nut form a compression device for compressing the upper clamping steel ring and the lower clamping steel ring, and the compression device is uniformly provided with multiple groups around the axis of the upper steel casing and the lower steel casing. In each group of compression devices, the top end of the radial outer side of the upper steel plate is connected upward with an upper reinforcing rib plate, and the bottom end of the radial outer side of the lower steel plate is connected downward with a lower reinforcing rib plate, and the upper reinforcing rib plate and the lower reinforcing rib plate are welded with the inner wall of the upper steel casing.

2. The micro-top pipe temporary steel casing joint assembly structure according to claim 1, characterized in that: ​ ​ 3. The micro-top pipe temporary steel casing joint assembly structure according to claim 2, characterized in that: ​

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