Concrete pipe joint structure suitable for sharp curve pipe jacking engineering

Abstract

This invention belongs to the field of tunnel construction technology and discloses a concrete pipe section structure suitable for sharp curve pipe jacking projects, comprising: a pipe body; a plug end; a socket; a gasket connected to the end face of the plug end or socket and located between the plug end end face and the socket end face, providing movement space when two adjacent concrete pipe sections deflect relative to each other; a rubber sealing ring; two first connecting parts groups; and a second connecting parts group, used to connect and fix the two adjacent first connecting parts groups after the two adjacent concrete pipe sections deflect relative to each other. This invention optimizes the joint sealing structure by sealing the gap with a rubber sealing ring, significantly improving the joint sealing reliability under sharp curve deflection conditions; the gasket greatly reduces damage caused by hard contact between the plug end and the socket, optimizes the stress structure at the pipe section end, and meets the strength design requirements of the complex stress of the pipe section during sharp curve jacking.

Description

Technical Field

[0001] This invention belongs to the field of tunnel construction technology, and specifically relates to a concrete pipe section structure suitable for pipe jacking projects on sharp curves. Background Technology

[0002] Sharp curve pipe jacking typically refers to pipe jacking projects with a horizontal turning radius of less than 150 meters, or a small ratio of bending radius to pipe diameter (R / D). Currently, the smallest R / D reported in domestic projects is approximately 60. With the acceleration of urban renewal and the increasing demand for intensive use of underground space, municipal drainage, integrated pipe gallery, and other projects are placing higher demands on route flexibility, creating a strong need for ultra-sharp curve pipe jacking construction capabilities with even smaller R / D ratios (such as below 30 or even 20).

[0003] However, as the R / D ratio decreases further, the required deflection angle between adjacent concrete pipe sections increases significantly, leading to uneven opening of the joint gap between adjacent pipe sections. If the traditional single rubber ring is used to seal between adjacent pipe sections, the rubber ring will fail due to insufficient local compression or excessive stretching, resulting in a decrease in sealing reliability. Moreover, stress concentration at the contact edge of adjacent pipe sections can easily lead to structural damage. Therefore, we propose a concrete pipe section structure suitable for steep curve pipe jacking projects to solve the above problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a concrete pipe section structure suitable for pipe jacking projects on steep curves, solving the issues of decreased sealing performance between adjacent pipe sections and easy structural damage.

[0005] This invention is achieved through the following solution: a concrete pipe section structure suitable for pipe jacking projects on sharp curves, comprising: tube body; An insertion end is provided at one end of the tube body; A socket is provided at the other end of the pipe body for the insertion end on the adjacent concrete pipe section to be inserted into, and a gap is left between the outer peripheral surface of the insertion end and the inner wall of the socket. A gasket is attached to the end face of the plug or socket and located between the plug end face and the socket end face where they are plugged in, providing space for movement when two adjacent concrete pipe sections deflect relative to each other. A rubber sealing ring is attached to the outer circumferential surface of the insertion end and / or the inner wall of the socket to seal the gap. Two first connecting parts are respectively fixed to the inner walls at both ends of the tube; and The second connector assembly is used to connect and fix two adjacent first connector assemblies after two adjacent concrete pipe sections have been deflected relative to each other.

[0006] A further improvement of the present invention for concrete pipe section structures applicable to pipe jacking projects on sharp curves is that it also includes a control mechanism connected to the inner wall of the pipe body located in the sharp curve area, used to control the relative deflection angle between two adjacent concrete pipe sections to be kept within a set range.

[0007] The further improvement of the present invention for concrete pipe section structures applicable to steep curve pipe jacking projects is that the control mechanism includes a limiting rod, four limiting members, and two second connecting seats. The two second connecting seats are respectively fixedly connected to the inner wall of the pipe body of two adjacent concrete pipe sections, and each of the two second connecting seats has a second through hole. The four limiting members are divided into pairs, and the two pairs of limiting members are respectively connected to the two ends of the limiting rod, and each pair of limiting members forms an active area. The two second connecting seats are movably sleeved in the two active areas through the second through holes.

[0008] A further improvement of the present invention for concrete pipe section structures applicable to pipe jacking projects on steep curves is that the distance between each pair of limiting members is adjustable, the limiting rod is a screw, the limiting member is a nut, and a gap is left between the screw and the second through hole.

[0009] A further improvement of the present invention for concrete pipe section structures applicable to pipe jacking projects with sharp curves is that a first steel plate is fixedly connected to the end face of the insertion end, a second steel plate is fixedly connected to the end face of the socket, and the gasket is connected to the first steel plate or the second steel plate.

[0010] A further improvement of the present invention for concrete pipe section structures applicable to pipe jacking projects with sharp curves is that a third steel plate is fixedly connected to the outer circumferential surface of the insertion end, and the third steel plate is fixedly connected to the first steel plate. The concrete pipe section structure also includes a steel collar fixedly sleeved on the outside of the second steel plate. One end of the steel collar is fixedly connected to the pipe body, and the other end of the steel collar extends away from the pipe body and forms the socket with the second steel plate. The rubber sealing ring is connected to the outer circumferential surface of the third steel plate and / or the inner wall of the steel collar.

[0011] The further improvement of the present invention for concrete pipe section structure applicable to pipe jacking projects with sharp curves is that multiple notches are opened at annular intervals at both ends of the pipe body with the central axis of the pipe body as the center. Each notch is fixedly connected with a stiffening rib. All stiffening ribs corresponding to the insertion end are obliquely supported between the first steel plate and the third steel plate, and all stiffening ribs corresponding to the socket are obliquely supported between the second steel plate and the steel collar.

[0012] The further improvement of the present invention for concrete pipe section structure applicable to pipe jacking projects with sharp curves is that each first connecting member group includes multiple first connecting seats, the multiple first connecting seats are arranged axially on the inner wall of the pipe body, and the multiple first connecting seats in two adjacent first connecting member groups on two pipe bodies correspond one-to-one. The second connecting member group includes multiple bolts, and the multiple bolts are respectively connected to multiple pairs of first connecting seats. Each of the first connecting seats has a first through hole for a bolt to pass through, and a gap is left between the bolt and the first through hole.

[0013] A further improvement of the present invention for concrete pipe section structures in steep curve pipe jacking projects is that the number of rubber sealing rings is multiple, and the multiple rubber sealing rings are arranged along the entire length of the gap.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention optimizes the joint sealing structure by sealing the gap with a rubber sealing ring, significantly improving the joint sealing reliability under sharp curve deflection conditions. The gasket greatly reduces the damage caused by hard contact between the plug end and the socket, optimizes the stress structure of the pipe section end, and meets the strength design requirements of the complex stress of the pipe section during sharp curve jacking. Attached Figure Description

[0015] Figure 1 A schematic diagram of the concrete pipe section structure of the present invention is shown.

[0016] Figure 2 A schematic diagram of the surrounding structure is shown when the insertion end of the present invention is inserted into the socket.

[0017] Figure 3 A schematic diagram of the position of the first connecting seat of the present invention is shown.

[0018] Figure 4 A schematic diagram of the installation position of the gasket of the present invention is shown.

[0019] Figure 5 A schematic diagram of the control mechanism structure of the present invention is shown.

[0020] In the diagram: 1. Pipe body; 2. Insert end; 3. Socket; 4. First steel plate; 5. Third steel plate; 6. Steel collar; 7. Stiffening rib; 8. Second steel plate; 9. First connecting seat; 10. Bolt; 11. Control mechanism; 111. Second connecting seat; 112. Screw; 113. Nut; 12. Gasket; 13. Rubber sealing ring; 14. Gasket layer. Detailed Implementation

[0021] To address the issues of decreased sealing performance between adjacent pipe sections and susceptibility to structural damage, this invention provides a concrete pipe section structure suitable for pipe jacking projects on sharp curves. The following detailed description, in conjunction with accompanying drawings, provides further illustration of this concrete pipe section structure suitable for pipe jacking projects on sharp curves.

[0022] See Figures 1-5 As shown, a concrete pipe section structure suitable for pipe jacking projects on sharp curves includes: tube body 1; Insertion 2 is located at one end of tube body 1; The socket 3 is located at the other end of the pipe body 1, for the insertion end 2 on the pipe body 1 of the adjacent concrete pipe section to be inserted. A gap is left between the outer circumferential surface of the insertion end 2 and the inner wall of the socket 3. The gasket 12 is connected to the end face of the plug end 2 or the socket 3 and is located between the end face of the plug end 2 and the end face of the socket 3, providing space for movement when two adjacent concrete pipe sections deflect relative to each other. A rubber sealing ring 13 is connected to the outer peripheral surface of the insertion end 2 and / or the inner wall of the socket 3 to seal the gap. Two first connecting parts are respectively fixed to the inner walls at both ends of the pipe body 1; and The second connector assembly is used to connect and fix two adjacent first connector assemblies after two adjacent concrete pipe sections have been deflected relative to each other.

[0023] By sealing the gap with rubber sealing ring 13, the joint sealing structure is optimized, significantly improving the joint sealing reliability under sharp curve deflection conditions; by setting gasket 12, the damage caused by hard contact between the plug end 2 and the socket 3 is greatly reduced, the stress structure of the pipe section end is optimized, and the strength design requirements of the pipe section under complex stress during sharp curve jacking are met.

[0024] It also includes a control mechanism 11, which is connected to the inner wall of the pipe body 1 in the area of ​​the sharp curve, and is used to control the relative deflection angle between two adjacent concrete pipe sections to be kept within a set range.

[0025] Furthermore, the aforementioned sharp curve area refers to the splicing end of the pipe body 1 of two adjacent concrete pipe sections at the sharp curve position in the tunnel. The control mechanism 11 is set in the outer area of ​​the bend section at the splicing end of the two pipe bodies 1. The pad 12 is two quarter-circle rings. The two pads 12 are fixed to the upper and lower ends of the end face of the insertion end 2 (the inner and outer sides of the bend section are the left and right ends, respectively). The left and right ends of the end face of the insertion end 2 are both fixed with pads 14. The pads 14 and the pads 12 are made of the same material, and the pads 14 are thinner than the pads 12, which fits the inner and outer sides of the bend section better and avoids hard contact between adjacent pipe bodies.

[0026] By adopting the above design, the relative deflection angle between two adjacent concrete pipe sections during the construction stage of the sharp curve is controlled by the control mechanism 11 to keep it within the set range. This avoids the problem of leakage at the joint caused by excessive opening angle, accurately controls the joint opening amount, and ensures the accuracy of the curve.

[0027] Among them, see Figure 5 As shown, the control mechanism 11 includes a limiting rod, four limiting members and two second connecting seats 111. The two second connecting seats 111 are respectively fixedly connected to the inner wall of the pipe body 1 of two adjacent concrete pipe sections, and each of the two second connecting seats 111 has a second through hole. The four limiting members are divided into pairs, and the two pairs of limiting members are respectively connected to the two ends of the limiting rod, and each pair of limiting members forms an active area. The two second connecting seats 111 are movably sleeved in the two active areas through the second through holes. The distance between each pair of limiting components is adjustable. The limiting rod is a screw 112, and the limiting component is a nut 113. A gap is left between the screw 112 and the second through hole.

[0028] By adopting the above design, the limiting length of the movable area on the screw 112 can be adjusted by adjusting each pair of nuts 113, thereby adjusting the setting range. This is beneficial for adjustment according to construction needs, improving applicability. Furthermore, the setting of this gap ensures that the limiting operation of the screw 112 does not affect the deflection angle of the concrete pipe section.

[0029] The first steel plate 4 is fixedly connected to the end face of the insertion end 2, the second steel plate 8 is fixedly connected to the end face of the socket 3, and the gasket 12 is connected to the first steel plate 4 or the second steel plate 8.

[0030] By adopting the above design, damage to pipe body 1 due to stress concentration during pipe section bends is avoided during the construction phase of sharp curves, and the insertion strength between the plug end 2 and the socket 3 is improved.

[0031] Further, see Figure 4 As shown, the liner 12 consists of two semi-circular pads, located on the inner and outer pressure zones of the concrete pipe section when it turns, respectively, to ensure that adjacent concrete pipe sections in the pressure zone do not make direct hard contact.

[0032] The third steel plate 5 is fixedly connected to the outer circumferential surface of the insertion end 2, and the third steel plate 5 is fixedly connected to the first steel plate 4. The concrete pipe section structure also includes a steel collar 6 fixedly sleeved on the outside of the second steel plate 8. One end of the steel collar 6 is fixedly connected to the pipe body 1, and the other end of the steel collar 6 extends away from the pipe body 1 and forms a socket 3 with the second steel plate 8. The rubber sealing ring 13 is connected to the outer circumferential surface of the third steel plate 5 and / or the inner wall of the steel collar 6.

[0033] By adopting the above design, the strength of the water-stop structure can be greatly improved by using the steel collar 6 and the third steel plate 5 together. In addition, the joint water-stop structure is optimized by using the rubber sealing ring 13, which significantly improves the reliability of joint sealing under sharp curve deflection conditions. Moreover, this form not only ensures water pressure but also reduces the reaction force under high compression ratio conditions, and increases the compression area of ​​the rubber strip, thereby improving the compression ratio.

[0034] Both ends of the tube body 1 are provided with multiple notches at intervals along the central axis of the tube body 1. Each notch is fixedly connected with a stiffening rib 7. All stiffening ribs 7 corresponding to the insertion end 2 are obliquely supported between the first steel plate 4 and the third steel plate 5. All stiffening ribs 7 corresponding to the socket 3 are obliquely supported between the second steel plate 8 and the steel collar 6.

[0035] By adopting the above design, the stiffening rib 7 can greatly improve the strength of the first steel plate 4, the second steel plate 8, the third steel plate 5, and the steel collar 6 during use, thereby improving the structural stability.

[0036] Each first connector group includes multiple first connector seats 9, which are arranged axially on the inner wall of the pipe body 1, and the multiple first connector seats 9 in two adjacent first connector groups on two pipe bodies 1 correspond one-to-one. The second connector group includes multiple bolts 10, and the multiple bolts 10 are respectively connected to multiple pairs of first connector seats 9. Each first connecting seat 9 has a first through hole for the bolt 10 to pass through, and a gap is left between the bolt 10 and the first through hole.

[0037] Further, see Figure 4 As shown, there are two first connecting seats 9 in each first connecting group and two bolts 10 in each second connecting group. The two first connecting seats 9 are located in the outer area of ​​the bend, which can better fix the pipe body 1 after adjustment, making the splicing end stable.

[0038] By adopting the above design, after the construction of the steep curve concrete pipe section is completed, the two first connecting seats 9 can be fixedly connected by passing the bolt 10 through the first through hole on the two corresponding first connecting seats 9 and tightening it with a nut, thereby realizing the connection and fixation of two adjacent concrete pipe sections; and by the gap set between the bolt 10 and the first through hole, the connection and fixation operation of the bolt 10 is not affected by the deflection angle of the concrete pipe section.

[0039] The number of rubber sealing rings 13 is multiple, and the multiple rubber sealing rings 13 are arranged along the entire length of the gap.

[0040] By adopting the above design and setting multiple rubber sealing rings 13, the sealing performance of the joint area can be greatly improved.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A concrete pipe section structure suitable for pipe jacking projects on sharp curves, characterized in that, include: tube body; An insertion end is provided at one end of the tube body; A socket is provided at the other end of the pipe body for the insertion end on the adjacent concrete pipe section to be inserted into, and a gap is left between the outer peripheral surface of the insertion end and the inner wall of the socket. A gasket is attached to the end face of the plug or socket and located between the plug end face and the socket end face where they are plugged in, providing space for movement when two adjacent concrete pipe sections deflect relative to each other. A rubber sealing ring is attached to the outer circumferential surface of the insertion end and / or the inner wall of the socket to seal the gap. Two first connecting parts are respectively fixed to the inner walls at both ends of the tube body; as well as The second connector assembly is used to connect and fix two adjacent first connector assemblies after two adjacent concrete pipe sections have been deflected relative to each other.

2. The concrete pipe section structure applicable to pipe jacking projects on sharp curves as described in claim 1, characterized in that, It also includes a control mechanism connected to the inner wall of the pipe body in the area of ​​the sharp curve, used to control the relative deflection angle between two adjacent concrete pipe sections to be kept within a set range.

3. The concrete pipe section structure applicable to pipe jacking projects on sharp curves as described in claim 2, characterized in that, The control mechanism includes a limiting rod, four limiting members, and two second connecting seats. The two second connecting seats are respectively fixedly connected to the inner walls of two adjacent concrete pipe sections, and each of the two second connecting seats has a second through hole. The four limiting members are divided into pairs, and the two pairs of limiting members are respectively connected to the two ends of the limiting rod, and each pair of limiting members forms a movable area. The two second connecting seats are movably sleeved in the two movable areas through the second through holes.

4. The concrete pipe section structure suitable for pipe jacking projects on sharp curves as described in claim 3, characterized in that, The distance between each pair of limiting members is adjustable. The limiting rod is a screw, and the limiting member is a nut. A gap is left between the screw and the second through hole.

5. The concrete pipe section structure applicable to pipe jacking projects on sharp curves as described in claim 1, characterized in that, A first steel plate is fixedly connected to the end face of the insertion end, and a second steel plate is fixedly connected to the end face of the socket. The gasket is connected to either the first steel plate or the second steel plate.

6. The concrete pipe section structure suitable for steep curve pipe jacking projects as described in claim 5, characterized in that, A third steel plate is fixedly connected to the outer circumferential surface of the insertion end, and the third steel plate is connected and fixed to the first steel plate. The concrete pipe section structure also includes a steel collar fixedly sleeved on the outside of the second steel plate. One end of the steel collar is fixedly connected to the pipe body, and the other end of the steel collar extends away from the pipe body and forms the socket with the second steel plate. The rubber sealing ring is connected to the outer circumferential surface of the third steel plate and / or the inner wall of the steel collar.

7. The concrete pipe section structure suitable for pipe jacking projects on sharp curves as described in claim 6, characterized in that, Both ends of the tube body are provided with multiple notches spaced in a ring around the central axis of the tube body. Each notch is fixedly connected with a stiffening rib. All the stiffening ribs corresponding to the insertion end are obliquely supported between the first steel plate and the third steel plate, and all the stiffening ribs corresponding to the socket are obliquely supported between the second steel plate and the steel collar.

8. The concrete pipe section structure applicable to pipe jacking projects on sharp curves as described in claim 1, characterized in that, Each of the first connector groups includes multiple first connector seats, which are axially arranged on the inner wall of the pipe body, and the multiple first connector seats in two adjacent first connector groups on the two pipe bodies correspond one-to-one. The second connector group includes multiple bolts, and the multiple bolts are respectively connected to multiple pairs of first connector seats. Each of the first connecting seats has a first through hole for a bolt to pass through, and a gap is left between the bolt and the first through hole.

9. The concrete pipe section structure applicable to pipe jacking projects on sharp curves as described in claim 1, characterized in that, The number of rubber sealing rings is multiple, and the multiple rubber sealing rings are arranged along the entire length of the gap.

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