Rectangular top pipe oblique connection receiving pipe section

Abstract

This invention relates to a rectangular jacking pipe oblique receiving section, comprising a first receiving section and a second receiving section. The first receiving section includes a rectangular pipe body with multiple first embedded parts on its inner wall and a tie-bar reinforcement zone at each of the four corners. A second embedded part is located on each side of one end of the rectangular pipe body, and an anchor bar is located on one side of each second embedded part. Adjacent rectangular pipe bodies are fixedly connected by the first embedded parts. The second receiving section has multiple third embedded parts on its inner wall and a pre-embedded steel plate at one end. The first and second receiving sections are fixedly connected by the third embedded parts, with a connecting seam in the middle. This rectangular jacking pipe oblique receiving section offers advantages such as improved reliability, reduced cost, simplified construction, increased application range of large-angle oblique rectangular jacking pipes, and improved bending strength.

Description

Technical Field

[0001] This invention relates to the field of rectangular pipe jacking construction technology, and in particular to a rectangular pipe jacking oblique receiving pipe section. Background Technology

[0002] In the field of construction engineering, with the advancement of science and technology, the application of mechanization is becoming increasingly sophisticated. Trenchless pipe jacking technology has been widely applied in underground space construction. Due to the utilization rate of the cross-section, the maturity of trenchless machinery and equipment, and construction techniques, the application of rectangular pipe jacking in underground engineering is becoming more and more widespread.

[0003] In recent years, with the maturity of trenchless technology and the vigorous development of rectangular pipe jacking, the field is moving towards more challenging applications. Generally, rectangular pipe jacking has a perpendicular connection between the opening and the tunnel, which is beneficial for water sealing at the opening and for receiving the pipe jacking machine. However, in some special projects, it is necessary to design a large-angle oblique receiving angle. Considering cost and safety issues, the pipe jacking machine does not use a shell or steel pipe sections; instead, a special type of concrete pipe section is required.

[0004] To address these issues, we developed a rectangular jacking pipe oblique receiving section. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by providing a rectangular jacking pipe oblique receiving pipe section, which has the advantages of improving reliability, reducing costs, simplifying construction, expanding the application range of large-angle oblique rectangular jacking pipes, and improving bending strength.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a rectangular jacking pipe oblique receiving pipe section, comprising a first receiving pipe section and a second receiving pipe section. The first receiving pipe section includes a rectangular pipe section body, with multiple first embedded parts provided on the inner wall of the rectangular pipe section body, and a tie bar reinforcement zone provided at each of the four corners. A second embedded part is provided on each side of one end of the rectangular pipe section body, and an anchor bar is provided on one side of the second embedded part. Two adjacent rectangular pipe sections are fixedly connected by the first embedded parts. The second receiving pipe section has multiple third embedded parts on its inner wall, and a pre-embedded steel plate at one end. The first receiving pipe section and the second receiving pipe section are fixedly connected by the third embedded parts.

[0007] Preferably, the first embedded part includes a first embedded plate and a plurality of hooks. One end of each hook is provided with a first hook structure and the other end is provided with a second hook structure. The first hook structure and the second hook structure are arranged perpendicularly to each other, and the second hook structure is fixedly connected to the first embedded plate.

[0008] Preferably, the third embedded part is fixedly connected to the first embedded part through a first channel steel, and the two ends and both sides of the first channel steel are respectively fixedly connected to the first embedded part, or one end and both sides of the first channel steel are fixedly connected to the third embedded part, and the other end and both sides are fixedly connected to the first embedded part.

[0009] Preferably, the structure and dimensions of the third embedded part are the same as those of the first embedded part.

[0010] Preferably, the reinforcement zone is provided with reinforcement, a first hook bar and a second hook bar. The two ends of the first hook bar and the second hook bar are fixedly connected by a third hook bar and a stirrup. The reinforcement is provided close to the outer wall of the rectangular pipe section body and is fixedly connected to the second embedded part. The first hook bar is fixedly connected to the second embedded part.

[0011] Preferably, the second embedded part is a cut steel plate, and a steel bar connector is fixedly connected to one side in the thickness direction. The steel bar connector is fixedly connected to the reinforcement and the first hook reinforcement on the side away from the second embedded part.

[0012] Preferably, the anchor bar and the segment reinforcing bar are fixedly connected on the side of the second embedded part away from the rebar connector, and the anchor bar and the segment reinforcing bar are arranged parallel to each other.

[0013] Preferably, one side of the second embedded part is provided with multiple rows of segment distribution bars, and the segment distribution bars are fixedly connected to the segment stress bars.

[0014] Preferably, the top of the second embedded part is provided with a second channel steel, which is located at the middle position of two adjacent first embedded parts.

[0015] Preferably, the second embedded part has multiple drill holes, which are fixedly connected to the anchor bar and the segment reinforcement bar, respectively.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] The rectangular jacking pipe oblique receiving pipe section of the present invention is connected by a first embedded part on the inner wall. The four corners of the pipe section are set with reinforcement reinforcement zones to improve reliability, reduce costs, and make construction simpler. The second embedded part is set with a steel plate at the cutting joint, which has a relatively low cost and is relatively simple to handle later. It expands the application range in the construction of large-angle oblique rectangular jacking pipes. One end of the second embedded part is treated with rebar, and the other end is fixedly connected by a connector to improve the bending strength of the pipe segment reinforcement. Attached Figure Description

[0018] Figure 1This is a front view of the rectangular jacking pipe oblique receiving pipe section described in this invention.

[0019] Figure 2 For the present invention Figure 1 Sectional view at EE.

[0020] Figure 3 This is a schematic diagram of the structure of the second receiving tube section of the present invention.

[0021] Figure 4 This is a schematic diagram of the connection between the first receiving tube section and the second receiving tube section of the present invention.

[0022] Figure 5 For the present invention Figure 4 Sectional view at point AA.

[0023] Figure 6 For the present invention Figure 4 Sectional view at point BB.

[0024] Figure 7 This is a schematic diagram of the structure of the first embedded part of the present invention.

[0025] Figure 8 For the present invention Figure 7 Sectional view at point CC.

[0026] Figure 9 This is a schematic diagram of the steel reinforcement structure of the oblique receiving pipe section of the rectangular jacking pipe according to the present invention.

[0027] Figure 10 For the present invention Figure 10 A schematic diagram of the internal structure.

[0028] Figure 11 This is a schematic diagram of the interface structure at the cut joint of the pipe section in this invention.

[0029] Figure 12 For the present invention Figure 11 A sectional view at DD.

[0030] Figure 13 This is a schematic diagram of the rebar installation structure of the second embedded part of the present invention. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Figures 1 to 3A rectangular jacking pipe oblique receiving section includes a first receiving section 100 and a second receiving section 200. The first receiving section 100 includes a rectangular section body 10, with multiple first embedded parts 20 on the inner wall of the body 10, and a tie-bar reinforcement zone 50 at each of the four corners. Each first embedded part 20 is 500mm long and 200mm wide, with 20 parts per section. The second receiving section 200 is a special section, differing from the first receiving section 100 in that it has a 10mm thick embedded steel plate 40 on its right side.

[0033] A second embedded part 60 is provided on each side of one end of the rectangular pipe section body 10. The second embedded part 60 is a 20mm thick steel plate, and an anchor bar 62 is provided on one side of the second embedded part 60. Two adjacent rectangular pipe sections 10 are fixedly connected by a first embedded part 20. Multiple third embedded parts 25 are provided on the inner wall of the second receiving pipe section 200, and a pre-embedded steel plate 40 is provided at one end. The arrow in the figure indicates the jacking direction. The first receiving pipe section 100 and the second receiving pipe section 200 are fixedly connected by the third embedded parts 25, and a connecting seam 105 is provided in the middle. Two first embedded steel pipes 11 are provided on the outer wall of the rectangular pipe section body 10 along the length direction, and two second embedded steel pipes 12 are provided on the outer wall along the width direction. The outer diameter of the first embedded steel pipe 11 and the second embedded steel pipe 12 are both 120mm and 200mm long, for hoisting and flipping. A first steel pipe grouting hole 13 is provided near the first embedded part 20 in the length direction, a second steel pipe grouting hole 14 is provided near the first embedded part 20 in the width direction, and a friction-reducing grouting hole 15 is provided near the second steel pipe grouting hole 14.

[0034] Figures 4 to 8In this design, the first embedded part 20 includes a first embedded plate 21 and a plurality of hooks 22, preferably six hooks 22. The hooks 22 are spaced 200mm apart along the length of the first embedded part 20 and 140mm apart along the width. One end of each hook 22 has a first hook structure 222, and the other end has a second hook structure 221, 50mm long. The first hook structure 222 and the second hook structure 221 are perpendicular to each other, and the second hook structure 221 is fixedly connected to the first embedded plate 21. The first hook structure 222 is bent 180° toward the body of the hook 22, and the second hook structure 221 is bent 90° toward the body of the hook 22. The first hook structure 222 and the second hook structure 221 are located on the same side of the hook 22. The third embedded part 25 is fixedly connected to the first embedded part 20 via a first channel steel 30. The first channel steel 30 is a No. 8 channel steel. Both ends and both sides of the first channel steel 30 are fixedly connected to the first embedded part 20, or one end and both sides of the first channel steel 30 are fixedly connected to the third embedded part 25, and the other end and both sides are fixedly connected to the first embedded part 20. The first channel steel 30 has an end 31, and the two sides of the end 31 have a first side portion 32 and a second side portion 33. The first side portion 32, the end 31, and the second side portion 33 are sequentially welded to the first embedded part 20. The distance between the end 31 and the edge of the first embedded part 20 is 50mm. Preferably, the structure and dimensions of the third embedded part 25 are the same as those of the first embedded part 20.

[0035] Figures 9 to 13 In the reinforcement zone 50, there are Φ25mm reinforcement bars 51, Φ32mm first hook bars 54, and Φ22mm second hook bars 55. Φ10mm steel bars are used in the reinforcement zone 50. The two ends of the first hook bars 54 and the second hook bars 55 are fixedly connected by Φ16mm third hook bars 52 and stirrups 53. The reinforcement bars 51 are located close to the outer wall of the rectangular pipe section body 10 and are fixedly connected to the second embedded part 60. The first hook bars 54 are also fixedly connected to the second embedded part 60. The second embedded part 60 is a cut steel plate, and a steel bar connector 61 is fixedly connected to one side in the thickness direction. The reinforcement bars 51 and the first hook bars 54 are fixedly connected to the side of the steel bar connector 61 away from the second embedded part 60. The second embedded part 60 has a 10mm thick and 200mm wide pipe section steel plate 65 located on the outer wall of the pipe section. The second embedded part 60 is fixedly connected to the anchor bar 62 and the segment reinforcing bar 63 on the side away from the rebar connector 61. The anchor bar 62 and the segment reinforcing bar 63 are arranged in parallel.

[0036] The second embedded part 60 has multiple rows of segment distribution ribs 64 on one side, and a second channel steel 66 at its top. The second embedded part 60 also has multiple drill holes 621. The segment distribution ribs 64 are fixedly connected to the segment reinforcing ribs 63. The second channel steel 66 is a 16b channel steel and is positioned at the midpoint between two adjacent first embedded parts 20. The longitudinal dimension of the second embedded part 60 is 540mm. The drill holes 621 are fixedly connected to the anchor bars 62 and the segment reinforcing ribs 63, respectively. 。 A longitudinal reinforcing bar 622 with a diameter of d2 is provided on the upper side of borehole 621. The diameter of borehole 621 is d, where d = 25 mm. The lateral distance between adjacent boreholes 621 is 5d, and the longitudinal distance is greater than or equal to 5d. The lateral distance from the center to the edge of borehole 621 is b, where b ≥ 2.5d, i.e., b ≥ 62.5 mm. The right side of the second embedded part 60 is removed after jacking, leaving the reinforcing bar connector 61.

[0037] The second receiving pipe section 200 is a special section made of reinforced concrete. Based on the shape of the oblique receiving section, a pre-cutting seam is reserved, and steel plates are pre-embedded at the seam location, i.e., the second embedded part 60. The second embedded part 60 connects the reinforcing bars at both ends together through rebar anchoring and connectors, ensuring the integrity of the special pipe section. Because the rectangular jacking pipe needs to withstand the jacking force of the rear main jacking cylinder during construction, it must meet the requirements of overall rigidity and stability. Setting up pre-embedded steel plates not only connects the reinforcing bars together but also ensures the integrity of the entire pipe section after cutting, and the flat end face facilitates later opening sealing and ring beam construction. Pre-embedded steel plates are set on both sides of the pre-reserved seam inside the pipe section. Before the pipe section is jacked up, the pre-reserved seam is tied to the steel plates to prevent damage during jacking and receiving.

[0038] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformations or substitutions fall within the scope of protection of the present invention.

Claims

1. A rectangular jacking pipe oblique receiving pipe section, characterized in that: The device includes a first receiving pipe section (100) and a second receiving pipe section (200). The first receiving pipe section (100) includes a rectangular pipe section body (10). The inner wall of the rectangular pipe section body (10) is provided with a plurality of first embedded parts (20), and a tie bar reinforcement zone (50) is provided at each of the four corners. A second embedded part (60) is provided on each side of one end of the rectangular pipe section body (10). An anchor bar (62) is provided on one side of the second embedded part (60). Two adjacent rectangular pipe sections (10) are fixedly connected by the first embedded parts (20). The inner wall of the second receiving pipe section (200) is provided with a plurality of third embedded parts (25), and a pre-embedded steel plate (40) is provided at one end. The first receiving pipe section (100) and the second receiving pipe section (200) are fixedly connected by the third embedded parts (25), and a connecting seam (105) is provided in the middle. The reinforced reinforcement zone (50) is provided with reinforcement (51), a first hook bar (54) and a second hook bar (55). The two ends of the first hook bar (54) and the second hook bar (55) are fixedly connected by a third hook bar (52) and a stirrup (53). The reinforcement (51) is located close to the outer wall of the rectangular pipe section body (10) and is fixedly connected to the second embedded part (60). The first hook bar (54) is fixedly connected to the second embedded part (60). The second embedded part (60) is a cut steel plate, and a steel bar connector (61) is fixedly connected to one side in the thickness direction. The steel bar connector (61) is fixedly connected to the reinforcement (51) and the first hook bar (54) on the side away from the second embedded part (60).

2. The rectangular jacking pipe oblique receiving pipe section according to claim 1, characterized in that, The first embedded part (20) includes a first embedded plate (21) and a plurality of hooks (22). One end of the hook (22) is provided with a first hook structure (222) and the other end is provided with a second hook structure (221). The first hook structure (222) and the second hook structure (221) are arranged perpendicularly, and the second hook structure (221) is fixedly connected to the first embedded plate (21).

3. The rectangular jacking pipe oblique receiving pipe section according to claim 2, characterized in that, The third embedded part (25) is fixedly connected to the first embedded part (20) through the first channel steel (30). The two ends and both sides of the first channel steel (30) are fixedly connected to the first embedded part (20) respectively, or one end and both sides of the first channel steel (30) are fixedly connected to the third embedded part (25), and the other end and both sides are fixedly connected to the first embedded part (20).

4. The rectangular jacking pipe oblique receiving pipe section according to claim 3, characterized in that, The structure and dimensions of the third embedded part (25) are the same as those of the first embedded part (20).

5. The rectangular jacking pipe oblique receiving pipe section according to claim 1, characterized in that, The second embedded part (60) is fixedly connected to the anchor bar (62) and the segment reinforcing bar (63) on the side away from the steel bar connector (61), and the anchor bar (62) and the segment reinforcing bar (63) are arranged in parallel.

6. The rectangular jacking pipe oblique receiving pipe section according to claim 5, characterized in that, The second embedded part (60) has multiple rows of segment distribution bars (64) on one side, and the segment distribution bars (64) are fixedly connected to the segment stress bars (63).

7. The rectangular jacking pipe oblique receiving pipe section according to claim 5, characterized in that, The top of the second embedded part (60) is provided with a second channel steel (66), which is located at the middle position of two adjacent first embedded parts (20).

8. The rectangular jacking pipe oblique receiving pipe section according to claim 5, characterized in that, The second embedded part (60) is provided with a plurality of drill holes (621), which are fixedly connected to the anchor bar (62) and the segment reinforcing bar (63) respectively.

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