Miniature jacking pipe of steel open caisson

Abstract

The utility model provides a steel open caisson miniature jacking pipe which comprises a steel casing, an easy opening and closing device arranged on the inner side of the first section of steel casing and a steel-concrete combined sealing bottom plate, the easy opening and closing device comprises a connecting ring and a sealing cover plate, the connecting ring is connected with the inner wall of the first section of steel casing, and the side of the sealing cover plate is rotationally connected with the inner wall of the first section of steel casing through a hinged shaft. The edges of the connecting ring and the closed cover plate are of arc-shaped structures, and the radian is coupled with the inner wall of the steel casing; the construction speed is high, construction is safe and reliable, meanwhile, the construction effect of fast bottom sealing of steel casing open caisson operation in a narrow space and steadiness of the steel casing open caisson in the pushing process is achieved, the construction device has the construction advantages of high stability, high efficiency, high benefits and the like in the implementation process, and the technical benefits are remarkable.

Description

Technical Field

[0001] This utility model relates to the field of municipal engineering, and in particular to steel caisson micro jacking pipes. Background Art

[0002] With the continuous development of urban infrastructure construction, the demand for upgrading and improving underground pipe networks is increasing. Traditional methods of trenching and laying pipes, along with the construction of retaining foundation pits, have a significant impact on the surrounding environment, easily leading to road occupation and pipeline relocation, and can no longer meet the needs of urban production and life. Micro-pipe jacking (small-diameter pipe jacking) technology, due to its small footprint, minimal environmental impact, less restriction by ground traffic and adjacent structures, and advanced construction technology, has been increasingly widely promoted and applied in urban infrastructure renovation and upgrading projects.

[0003] Microjacking construction technology presents several challenges: 1) Complex geological conditions: Pipe jacking construction needs to be carried out underground, and the uncertainty of geological conditions poses a significant challenge. If there are large rock masses, water flows, soft soil, etc. underground, appropriate foundation treatment is required; otherwise, it will cause great difficulties in construction. 2) Space constraints: Pipe jacking construction needs to be carried out in a limited space. If the space is too small, the difficulty of construction will increase accordingly, especially the drilling operations in the pipe wall. 3) Construction safety: Pipe jacking construction needs to be carried out underground, and construction safety is the most important point. The stability of the caisson wall and the reliability of the jacking guide frame are particularly important. Utility Model Content

[0004] The purpose of this utility model is to provide a steel caisson micro jacking pipe that solves the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, this utility model provides a steel caisson micro jacking pipe, including a steel casing, an easy-opening and closing device located inside the first section of the steel casing, and a steel-concrete composite sealing bottom plate. The easy-opening and closing device includes a connecting ring and a sealing cover plate. The connecting ring is connected to the inner wall of the first section of the steel casing, and the side of the sealing cover plate is rotatably connected to the inner wall of the first section of the steel casing through a hinge. The edges of the connecting ring and the sealing cover plate are both arc-shaped structures, and the arc is coupled to the inner wall of the steel casing.

[0006] Furthermore, the cover plate and the connecting ring are connected by anchor bolts, and the connecting ring is provided with several bolt holes corresponding to the anchor bolts along the circumference, so that after the cover plate rotates to cover the connecting ring, the anchor bolts are connected to the bolt holes.

[0007] Furthermore, the steel-concrete composite bottom plate is composed of multiple fan-shaped steel-concrete composite plates spliced ​​together. The edges of the fan-shaped steel-concrete composite plates are all set with blade edges, and the edges of the fan-shaped steel-concrete composite plates are connected to the inner wall of the first section of steel casing through hinge balls. A lifting ring is set at the center of the steel-concrete composite bottom plate and at the end of the fan-shaped steel-concrete composite plates.

[0008] Furthermore, several hooks are installed on the wall of the first section of the steel casing, and a ring-shaped bracket is installed on the hooks, with a ring-shaped water collection tank installed inside the ring-shaped bracket.

[0009] Furthermore, the steel casing is equipped with a ribbed and reinforced guide frame, and the pipe jacking machine is placed at the ribbed and reinforced guide frame. The ribbed and reinforced guide frame is equipped with an arc-shaped backrest, and several reinforcing ribs are vertically and equally spaced at the top of the arc-shaped backrest.

[0010] Furthermore, the bottom of the ribbed and reinforced guide frame is placed on the steel-concrete composite bottom plate via several bases.

[0011] Furthermore, a temporary steel inner support is detachably installed on the wall of the steel casing. The temporary steel inner support includes a main support ring, an electric jack, and a vertical arc-shaped support plate. Several electric jacks are evenly arranged circumferentially on the main support ring. A vertical arc-shaped support plate is provided at the end of the electric jack and supports the inner wall of the steel casing.

[0012] Furthermore, a rubber sealing ring is installed between the annular water collection tank and the inner wall of the first steel casing.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By setting one or more temporary steel internal supports in the upper space of the steel casing caisson, the stability of the caisson wall is improved. The temporary steel internal supports are mainly supported by electric jacks, which is convenient and quick. At the same time, the setting of the main support ring also facilitates the temporary hoisting of equipment inside the caisson.

[0015] 2. By connecting multiple fan-shaped steel-concrete composite plates with hinged balls on the inner wall of the steel casing, rapid bottom sealing of the well is achieved. At the same time, the blade design reduces the resistance of the steel casing's rotation and sinking. Compared with traditional cast-in-place concrete bottom sealing, this greatly improves on-site construction efficiency and ensures the quality of bottom sealing construction in confined spaces. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the construction of a steel caisson micro jacking pipe according to this utility model;

[0017] Figure 2 This utility model Figure 1 AA cross-section view;

[0018] Figure 3 This utility model Figure 1 BB cross-section;

[0019] Figure 4 This is a schematic diagram of the installation of the ring-shaped bracket of this utility model;

[0020] Figure 5This is a schematic diagram of the installation of the annular water collection tank of this utility model;

[0021] Figure 6 This is a top view of the installation of the ribbed and reinforced guide frame of this utility model;

[0022] Figure 7 This is a schematic diagram of the easy-opening and closing device of this utility model;

[0023] Figure 8 This is a schematic diagram of the double-casing support formwork construction structure of the inspection well of this utility model.

[0024] In the diagram: 1-Original foundation soil; 2-Steel casing; 3-Main support ring; 4-Electric jacking device; 5-Vertical arc-shaped support plate; 6-Compacting grouting zone; 7-Reinforcing rib plate; 8-Guide frame; 9-Annular water collection tank; 10-Base; 11-Full-span high-pressure jet grouting pile; 12-Steel-concrete composite plate; 13-Sealed cover plate; 14-Annular hanging frame; 15-Rubber sealing ring; 16-Connecting ring; 17-Bolt hole; 18-Hinge shaft; 19-Anchor bolt; 20-Wire rope; 21-Hinge ball; 22-Steel ring template; 23-Water-swellable rubber sleeve; 24-Lifting ring; 25-Arched backrest; 26-Inspection well; 27-Interior steel casing; 28-Sensor line; 29-Pipe jacking machine; 30-Concrete pipe; 31-Hook. DETAILED DESCRIPTION

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0026] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0027] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0028] like Figures 1-8 The present invention provides a steel caisson micro jacking pipe, which can be constructed using the following steps:

[0029] S1. Measurement and layout, prefabricated steel casing 2 arrives on site: Measurement and layout determine the construction position of the caisson, check the appearance quality of the steel casing 2, and close the easy-opening and closing device inside the first section of the steel casing 2. At the same time, the steel-concrete composite sealing bottom plate is fixed to the casing wall by hooking it with steel wire rope 20.

[0030] In this step, such as Figure 7 As shown, the easy-opening and closing device includes a connecting ring 16, a closing cover plate 13, and anchor bolts 19. The connecting ring 16 is welded to the inner wall of the first section of the steel casing 2. The side of the closing cover plate 13 is rotatably connected to the inner wall of the first section of the steel casing 2 through a hinge shaft 18. The closing cover plate 13 and the connecting ring 16 are connected by anchor bolts 19. The edges of both the connecting ring 16 and the closing cover plate 13 are arc-shaped, and the arc is coupled to the inner wall of the steel casing 2. The connecting ring 16 is provided with several bolt holes 17 corresponding to the anchor bolts 19 along the circumference, so that after the closing cover plate 13 rotates to cover the connecting ring 16, the anchor bolts 19 are connected to the bolt holes 17 to fasten the connecting ring 16 and the closing cover plate 13.

[0031] like Figure 3 As shown, the steel-concrete composite bottom plate is composed of multiple fan-shaped steel-concrete composite plates 12 spliced ​​together. The edges of the fan-shaped steel-concrete composite plates 12 are all set with blade edges, and the edges of the fan-shaped steel-concrete composite plates 12 are connected to the inner wall of the first section of steel casing 2 through a single hinge ball 21. A lifting ring 24 is set at the center of the steel-concrete composite bottom plate and at the end of the fan-shaped steel-concrete composite plate 12. The wire rope 20 is connected to the lifting ring 24 and passes through the hinge ball 21 so that the wire rope 20 can be rotated and engaged through the hinge ball 21 when it is hoisted.

[0032] S2. Preliminary excavation of the foundation pit and arrival of the pipe rolling machine: The foundation pit is manually excavated to a depth of 2 meters for the first steel casing, and the pipe rolling machine is simultaneously brought to the site for commissioning.

[0033] S3. The first section of steel casing 2 is hoisted into the pit, and the second section of steel casing 2 is welded to increase its height: The first section of steel casing 2 is hoisted into the pit, and the sealing performance of the easy-opening and closing device and the tightness of the wire rope 20 are checked. After the inspection is qualified, the pipe shaking machine is installed on the first section of steel casing 2 and fixed to the ground. At the same time, the second section of steel casing 2 is welded and spliced ​​to the first section of steel casing 2 to increase its height.

[0034] S4. Mechanical sinking of the steel cylinder, repeated welding of the remaining steel casing 2 to the design elevation: Start the pipe shaking machine to sink the steel casing 2 at a uniform speed, and repeatedly weld the remaining steel casing 2 to the design elevation.

[0035] S5. High-pressure jet grouting pit bottom reinforcement and lowering of steel-concrete composite bottom sealing: After the steel casing 2 is lowered to the design elevation, the pit bottom is reinforced by driving full-span high-pressure jet grouting piles 11. Then, water-swellable rubber sleeves 23 are fitted on the edge of the steel-concrete composite bottom sealing plate. Finally, the steel wire rope 20 is released to lower the steel-concrete composite bottom sealing plate, completing the steel-concrete composite bottom sealing of the caisson.

[0036] S6. Install the annular water collection tank 9, hoist the guide frame 8 and the pipe jacking machine 29: Use the hook 31 on the wall of the first section of the steel casing 2 to install the annular bracket 14, and install the annular water collection tank 9 inside the annular bracket 14. Then hoist the ribbed and reinforced guide frame 8 and the pipe jacking machine 29 in sequence.

[0037] In this step, such as Figure 4 , Figure 5 As shown, a rubber sealing ring 15 is provided between the annular water collection tank 9 and the inner wall of the first section of steel casing 2, and the two sides of the annular water collection tank 9 are placed in two adjacent annular brackets 14. The annular brackets 14 are U-shaped in general so that the two adjacent annular brackets 14 can be spliced ​​together to form an annular structure.

[0038] like Figure 6 As shown, the ribbed and reinforced guide frame 8 is provided with an arc-shaped backrest 25. Several reinforcing ribs 7 are vertically and evenly spaced on the top of the arc-shaped backrest 25. The ribbed and reinforced guide frame 8 is reserved with a jacking hole. Connecting holes are evenly arranged around the jacking hole so that the pipe jacking machine 29 can be connected to the connecting hole.

[0039] Among them, the bottom of the ribbed and reinforced guide frame 8 is placed on the steel-concrete composite bottom plate through several bases 10.

[0040] S7. Install temporary steel internal supports and open the opening and closing ports: Install temporary steel internal supports on the upper steel casing 2 cylinder wall, open the easy-opening and closing devices on both sides of the first section of steel casing 2, adjust the position of the guide frame 8 and the pipe jacking machine 29, and anchor the arc-shaped backrest 25 of the guide frame 8 to the connecting ring 16 of the easy-opening and closing device on one side.

[0041] In this step, such as Figure 2 As shown, the temporary steel inner support includes a main support ring 3, an electric jack 4, and a vertical arc-shaped support plate 5. Several electric jacks 4 are evenly arranged circumferentially on the main support ring 3. The ends of the electric jacks 4 are provided with vertical arc-shaped support plates 5, and the vertical arc-shaped support plates 5 support the inner wall of the steel casing 2.

[0042] Among them, several electric jacks 4 are connected by sensor lines 28 to enable several electric jacks 4 to push the vertical arc-shaped support plate 5 simultaneously to ensure the stability of the main support ring 3.

[0043] S8. Micro-jacking construction: Start the jacking machine 29 to jack the pilot pipe into the receiving well according to the design trajectory, then connect it to the black pipe. Install a simple extrusion head at the end of the black pipe, then hoist the resin concrete pipe and jack it in sections to form a concrete pipe 30.

[0044] S9. Construction equipment dismantling and double-casing support formwork construction of inspection well 26: After the concrete pipe 30 is installed, the temporary steel internal support is removed, and the construction equipment in the caisson is lifted out in sequence. The ring hanger 14 and the ring water collection tank 9 are recovered, and the steel ring template 22 is installed on the easy-opening and closing device connecting ring 16. Then, the inner steel casing 27 is hoisted, and the concrete of inspection well 26 is poured. After the concrete has initially set, the inner steel casing 27 is pulled out to complete the construction.

[0045] In this step, such as Figure 8 As shown, the inner diameter of the steel ring template 22 is the same as the inner diameter of the resin concrete pipe, and the length of the steel ring template 22 is the same as the thickness of the cast-in-place concrete inspection well 26.

[0046] The original foundation soil 1 is filled with a compaction grouting zone 6 on the outer periphery of the steel casing 2, so that the compaction grouting zone 6 wraps around the outside of the steel casing 2 and the concrete pipe 30.

[0047] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A steel caisson micro-jacking pipe, characterized in that: It includes a steel casing (2), an easy-opening and closing device located inside the first section of the steel casing (2), and a steel-concrete composite sealing bottom plate. The easy-opening and closing device includes a connecting ring (16) and a sealing cover plate (13). The connecting ring (16) is connected to the inner wall of the first section of the steel casing (2). The side of the sealing cover plate (13) is rotatably connected to the inner wall of the first section of the steel casing (2) through a hinge shaft (18). The edges of the connecting ring (16) and the sealing cover plate (13) are both arc-shaped structures, and the arc is coupled to the inner wall of the steel casing (2).

2. The steel caisson micro-jacking pipe according to claim 1, characterized in that: The closed cover plate (13) and the connecting ring (16) are connected by anchor bolts (19), and the connecting ring (16) is provided with several bolt holes (17) corresponding to the anchor bolts (19) along the circumferential direction, so that after the closed cover plate (13) rotates to cover the connecting ring (16), the anchor bolts (19) are connected to the bolt holes (17).

3. The steel caisson micro-jacking pipe according to claim 1, characterized in that: The steel-concrete composite bottom plate is composed of multiple fan-shaped steel-concrete composite plates (12) spliced ​​together. The edges of the fan-shaped steel-concrete composite plates (12) are all set with blade edges, and the edges of the fan-shaped steel-concrete composite plates (12) are connected to the inner wall of the first section of steel casing (2) through a hinge ball (21). A lifting ring (24) is set at the center of the steel-concrete composite bottom plate and at the end of the fan-shaped steel-concrete composite plate (12).

4. The steel caisson micro-jacking pipe according to claim 1, characterized in that: Several hooks (31) are provided on the wall of the first section of steel casing (2), and an annular bracket (14) is installed on the hooks (31), and an annular water collection tank (9) is installed inside the annular bracket (14).

5. The steel caisson micro-jacking pipe according to claim 1, characterized in that: The steel casing (2) is equipped with a ribbed and reinforced guide frame (8), and the pipe jacking machine (29) is placed at the ribbed and reinforced guide frame (8). The ribbed and reinforced guide frame (8) is equipped with an arc-shaped backrest (25), and the top of the arc-shaped backrest (25) is provided with several reinforcing ribs (7) at equal intervals in the vertical direction.

6. The steel caisson micro-jacking pipe according to claim 5, characterized in that: The ribbed and reinforced guide frame (8) is placed on the steel-concrete composite bottom plate via several bases (10).

7. The steel caisson micro jacking pipe according to claim 1, characterized in that: Temporary steel inner supports are detachably installed on the wall of the steel casing (2). The temporary steel inner supports include a main support ring (3), an electric jack (4), and a vertical arc support plate (5). Several electric jacks (4) are evenly arranged circumferentially on the main support ring (3). A vertical arc support plate (5) is provided at the end of the electric jack (4), and the vertical arc support plate (5) supports the inner wall of the steel casing (2).

8. The steel caisson micro jacking pipe according to claim 4, characterized in that: A rubber sealing ring (15) is provided between the annular water collection tank (9) and the inner wall of the first steel casing (2).

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