A pipe joint suitable for large-section jacking pipe
By introducing a self-waterproof locking device into the top pipe connection structure, the water induction plate and linear drive structure are used to automatically detect and eliminate local leakage, the problem of waterproof failure of the traditional top pipe connection structure in complex formations is solved, and the construction quality and safety are improved.
Patent Information
- Application Number
- CN202421613143.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The traditional top pipe connection structure fails to waterproof due to uneven stress in complex formations, and the deformation of the steel sleeve ring is uncontrollable, affecting construction quality and safety.
The connection structure including a lead pipe section, a subsequent pipe section and a multiple self-waterproof locking devices is adopted. Through the cooperation of the steel sleeve ring and waterproof sealing strip on the outside of the notch, the linear driving structure of the self-waterproof locking device and the water sensing plate are used to automatically detect and eliminate local leakage.
It effectively solves the problem of uneven stress between the steel collar and neoprene, improves waterproof performance, reduces stress and cracks in the pipe joints, and enhances the stability and shear resistance between the pipe joints.
Smart Images
Figure CN222717687U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of underground tunnel engineering, in particular to a pipe joint suitable for large-section jacking pipes. Background Art
[0002] With the acceleration of urbanization, the development and utilization of urban underground space has become more and more extensive. Trenchless construction technology has been widely used as an energy-saving, environmentally friendly and efficient construction method. Pipe jacking construction is an important form of trenchless construction technology, mainly used for the laying of underground pipelines, such as water supply, drainage, gas, electricity, communications, etc. The basic principle of pipe jacking construction is to use a pipe jacking machine to push the pipe section on the surface or in the well, so that the pipe section passes through the soil along a predetermined trajectory to form a pipeline. Pipe jacking construction has the advantages of fast construction speed, high construction quality, small impact on the environment, and low construction cost. It is an ideal trenchless construction method.
[0003] The commonly used F-type socket joint is to paste and install 1 to 2 layers of neoprene on the tenon part of the subsequent pipe section, insert the steel sleeve ring at the tail of the first pipe section, and be squeezed by the outer steel sleeve ring to form the main waterproof structure during the pipe jacking construction period; after the pipe jacking construction is completed, slurry is injected through the reserved grouting hole for secondary plugging, and the slurry becomes the second waterproof structure during operation after solidification. This connection structure can rely on the strength of the outer steel sleeve ring to resist a certain degree of misalignment and deformation.
[0004] With the development of engineering technology and the increasing number of pipe jacking cases, it can be found that when the pipe jacking passes through complex formations, due to the uneven distribution of torque on the face of the pipe jacking machine head and uneven settlement of the foundation, the traditional connection structure will have the following problems:
[0005] (1) The force between the steel ring and the chloroprene rubber is uneven, which may cause voids in some areas, resulting in waterproof failure;
[0006] (2) The deformation of the steel sleeve is uncontrollable. When the deformation is large, once it exceeds the elastic limit of the steel sleeve, the deformation cannot be restored and the pipe section is damaged. The steel sleeve located on the outside of the pipe section (facing the soil surface) cannot be replaced, and it can only be sealed by secondary grouting. The water blocking effect is uncontrollable and will have a serious impact on the subsequent pipe jacking construction. Summary of the invention
[0007] The utility model aims to provide a pipe joint suitable for large-section jacking pipes, which solves the problem that uneven force between a steel sleeve ring and chloroprene rubber may cause voids in some areas, resulting in waterproof failure.
[0008] The utility model solves the above technical problems through the following technical solutions. The utility model comprises a preceding pipe section, a subsequent pipe section and a plurality of self-waterproof locking devices; wherein:
[0009] The preceding pipe section and the following pipe section each have a tenon at one end and a notch at the other end;
[0010] The notch of the preceding pipe section is installed with a steel casing outside the notch, and the tenon of the subsequent pipe section is inserted and installed in the steel casing outside the notch;
[0011] The plurality of self-waterproof locking devices are distributed along the circumference of the preceding pipe segment.
[0012] Preferably, the slot of the preceding pipe joint is installed with a steel sleeve inside the slot, and the steel sleeve inside the slot and the steel sleeve outside the slot are installed on the inside and outside of the slot respectively, and the steel sleeve inside the slot cooperates with the tenon of the subsequent pipe joint.
[0013] Preferably, the tenon of the subsequent pipe segment is fixed with an outer steel collar and an inner steel collar of the tenon, and the outer steel collar and the inner steel collar are respectively fixed to the outer side and the inner side of the tenon.
[0014] Preferably, the outer steel ring of the notch, the inner steel ring of the notch, the outer steel ring of the tenon and the inner steel ring of the tenon are all fixed with a plurality of oblique anchor steel bars, and the plurality of oblique anchor steel bars are evenly distributed in the corresponding pipe sections.
[0015] Preferably, the self-waterproof locking device comprises a water sensing sheet, a pressing block and a linear drive structure; wherein:
[0016] The outer wall of the steel sleeve ring outside the notch has a recessed portion, the pressure block is arranged in the recessed portion, the linear drive structure is installed in a through-type manner on the tenon of the subsequent pipe section, the telescopic end of the linear drive structure is fixed to the pressure block, and the water sensor sheet is installed on the inner surface of the steel sleeve outside the notch.
[0017] Preferably, an annular rubber gasket is fixed to the inner surface of the pressing block.
[0018] Preferably, two waterproof sealing strips are installed around the tenon of the subsequent pipe segment on its outer side, and the two waterproof sealing strips are respectively located on both sides of the self-waterproof locking device.
[0019] Preferably, a plurality of first grouting holes and a plurality of second grouting holes are spaced apart at the tenon of the subsequent pipe segment, and the plurality of first grouting holes and the plurality of second grouting holes are respectively spaced apart and evenly distributed along the circumference of the subsequent pipe segment, the plurality of first grouting holes are located in the area not covered by the steel collar outside the slot, and the plurality of second grouting holes are located in the area covered by the steel collar outside the slot.
[0020] Preferably, a plywood is provided between the preceding pipe section and the subsequent pipe section, and a sealant is provided on the inner side of the plywood.
[0021] Compared with the prior art, the beneficial effects of the present invention are:
[0022] 1. Compared with the traditional F-type socket joint, the utility model is provided with a self-waterproof locking device with adjustable anchoring force. When the pipe joint is in a complex formation, the force between the joint steel ring and the waterproof sealing strip is uneven, and a gap is formed in some areas, resulting in waterproof failure, the steel ring outside the notch can be actively tightened to eliminate the gap between the two in time, thereby plugging the leak and waterproofing;
[0023] 2. The semi-rigid jacking pipe section of the utility model can maintain a certain strength and rigidity while having a certain flexibility and adaptability, can adapt to the deformation of complex formations, and reduce the stress and cracking of the pipe section;
[0024] 3. The self-waterproof locking device of the utility model can effectively fix the waterproof sealing strip and the pipe joint, enhance the stability and shear resistance between the pipe joints, and prevent the dislocation and falling off of the pipe joints;
[0025] 4. The self-waterproof device of the utility model can also utilize the principle of water-sensing sheets to automatically detect and handle water seepage problems, thereby improving the waterproof performance of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the local structure when the tenon and the notch are connected in the utility model;
[0027] Figure 2 It is a schematic diagram of the waterproof structure in the utility model;
[0028] Figure 3 It is a structural schematic diagram of the tenon and the notch in the utility model when connected.
[0029] The numbers in the figure represent:
[0030] 1-1: preceding pipe section, 1-2: subsequent pipe section, 2-1: steel sleeve ring on the outside of the notch, 2-2: steel sleeve ring on the inside of the notch, 3-1: steel sleeve ring on the outside of the tenon, 3-2: steel sleeve ring on the inside of the tenon, 4: inclined anchor steel bars, 5-1: the first waterproof sealing strip, 5-2: the second waterproof sealing strip, 6: self-waterproof locking device, 7 water-sensing sheet, 8: sealant, 9: the first grouting hole, 10: the second grouting hole, 11: plywood, 13: annular rubber gasket. DETAILED DESCRIPTION
[0031] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.
[0032] This embodiment provides a technical solution: a connection structure suitable for large-section jacking pipe sections, such as Figure 1-2 As shown, it includes two sections of end-to-end butt-jointed pipe joints, namely a leading pipe joint 1-1 and a subsequent pipe joint 1-2, and the two ends of the pipe joint are respectively a tenon and a groove.
[0033] The notch of the preceding pipe segment 1-1 is fixed with a steel collar 2-1 on the outside of the notch and a steel collar 2-2 on the inside of the notch, which are located on the outside and inside of the notch respectively, and the steel collar 2-1 on the outside of the notch extends axially to the outside of the tenon of the subsequent pipe segment 1-2; the tenon of the subsequent pipe segment 1-2 is fixed with a steel collar 3-1 on the outside of the tenon and a steel collar 3-2 on the inside of the tenon, which are fixed on the outside and inside of the tenon respectively.
[0034] The outer steel collar 2-1 of the notch, the inner steel collar 2-2 of the notch, the outer steel collar 3-1 of the tenon and the inner steel collar 3-2 of the tenon are all fixed with a plurality of inclined anchor steel bars 4 located in the pipe section. The plurality of inclined anchor steel bars 4 are evenly distributed in the pipe section to increase the stability of the plurality of steel collars.
[0035] Two waterproof sealing strips are installed around the tenon of the subsequent pipe section 1-2, namely, a first waterproof sealing strip 5-1 and a second waterproof sealing strip 5-2.
[0036] Among them, a plurality of first grouting holes 9 and a plurality of second grouting holes 10 are spaced apart at the tenon of the subsequent pipe segment 1-2, and the plurality of first grouting holes 9 and the plurality of second grouting holes 10 are spaced apart and evenly distributed along the circumference of the pipe segment, respectively. The plurality of first grouting holes 9 are located in the area not covered by the steel sleeve ring 2-1 outside the slot, and the second grouting holes 10 are located in the area covered by the steel sleeve ring 2-1 outside the slot.
[0037] In order to protect the contact surface between two adjacent pipe sections, a plywood 11 is provided between the preceding pipe section 1-1 and the subsequent pipe section 1-2 to transfer the top force load and coordinate the deformation.
[0038] During the jacking construction stage, the tenon of the subsequent pipe segment 1-2 is inserted into the notch at the tail end of the preceding pipe segment 1-1 under the jacking force of the jacking machine, and the steel sleeve ring 2-1 outside the notch cooperates with the first waterproof sealing strip 5-1 and the second waterproof sealing strip 5-2 to form a first waterproof structure; after the construction is completed, waterproof slurry is injected into the pores between the pipe segment and the soil through the first grouting hole 9 and the second grouting hole 10 to form a second waterproof structure; in addition, the sealant 8 is used to fill the gap formed in the internal space of the pipe segment due to the deformation of the pipe segment after the construction is completed, and after solidification, it forms a third waterproof measure with the sealant 8 in the middle of the plywood 11, and the sealant 8 is a high modulus sealant.
[0039] A plurality of self-waterproof locking devices 6 are provided between the steel sleeve ring 2-1 outside the notch of the preceding pipe segment 1-1 and the tenon of the following pipe segment 1-2, and the plurality of self-waterproof locking devices 6 are evenly distributed along the circumference of the preceding pipe segment 1-1.
[0040] The self-waterproof locking device includes a water-sensing plate 7, a pressure block and a linear drive structure; the outer wall of the steel sleeve ring outside the notch has a recessed portion, the pressure block is arranged in the recessed portion, the linear drive structure is installed in a through-type manner on the tenon of the subsequent pipe section, the linear drive structure is a cylinder, a hydraulic cylinder or a straight rod motor, etc., the telescopic end of the linear drive structure is fixed to the pressure block, and the water-sensing plate 7 is installed on the inner surface of the steel sleeve outside the notch.
[0041] During the jacking construction, after the tenon of the subsequent pipe segment 1-2 is inserted into the notch of the preceding pipe segment 1-1 and before it is pushed into the soil layer, a self-waterproof locking device 6 is manually installed from the outside of the pipe segment, and the pressure block is located in the recessed part of the steel sleeve ring 2-1 outside the notch to ensure that the soil surface on the outside of the pipe wall is flat and has no protrusions; the linear drive structure of the self-waterproof locking device 6 extends into the inner side of the pipe segment of the subsequent pipe segment 1-2. When the pipe segment is misaligned and settled, and the steel sleeve ring 2-1 outside the notch is deformed too much to cause local leakage, water will pass through the annular rubber gasket 13. When the water contacts the water sensing sheet 7, the water sensing sheet 7 will start the linear drive structure to generate tension, further pulling the steel sleeve ring 2-1 outside the notch to compress the waterproof sealing strip to eliminate local leakage, thereby achieving a better waterproof effect.
[0042] Furthermore, in order to ensure waterproof sealing, an annular rubber gasket 13 is arranged between the outer pressure block and the outer steel sleeve ring 2-1 of the groove, and is compressed and deformed under the anchoring force of the self-waterproof tightening device 6 to seal the gap between the head of the device and the steel plate.
[0043] During the construction of the pipe jacking tunnel, due to factors such as stratum changes, adjustment of the pipe jacking posture, and pipe segment selection, the pipe segments may be misaligned and subsided, that is, the height difference between the pipe segments exceeds the specification requirements. In this case, the steel collar 2-1 outside the notch of the pipe segment, which is the sealing structure between the pipe segments, will be subjected to greater stress, causing deformation or damage, thereby causing local leakage. The leaking water will flow along the gap of the pipe segment and eventually enter the interior of the pipe segment through the sealing structure. When the water sensor sheet 7 contacts the seepage water, the water sensor sheet 7 will send a signal to the linear drive structure, and the linear drive structure will start to work. The linear drive structure applies force to tighten the steel collar 2-1 outside the notch, and timely eliminate the gap between the steel collar 2-1 outside the notch and the notch of the subsequent pipe segment 1-2, so as to achieve the purpose of plugging and waterproofing. This implementation can effectively prevent the influence of water seepage on the pipe segment and the tunnel, and improve the safety and durability of the tunnel.
[0044] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.
Claims
1. A pipe joint suitable for large-section jacking pipes, characterized in that: It includes a preceding pipe section, a subsequent pipe section and a plurality of self-waterproof locking devices; wherein: The preceding pipe section and the following pipe section each have a tenon at one end and a notch at the other end; The notch of the preceding pipe section is installed with a steel casing outside the notch, and the tenon of the subsequent pipe section is inserted and installed in the steel casing outside the notch; A plurality of the self-waterproof locking devices are distributed along the circumference of the preceding pipe segment; The self-waterproof locking device comprises a water sensing sheet, a pressing block and a linear drive structure; wherein: The outer wall of the steel sleeve ring outside the notch has a recessed portion, the pressure block is arranged in the recessed portion, the linear drive structure is installed in a through-type manner on the tenon of the subsequent pipe section, the telescopic end of the linear drive structure is fixed to the pressure block, and the water sensor sheet is installed on the inner surface of the steel sleeve outside the notch.
2. The pipe joint suitable for large-section jacking pipe according to claim 1, characterized in that: The slot of the preceding pipe section is installed with a slot inner steel sleeve, and the slot inner steel sleeve and the slot outer steel sleeve are installed on the inner and outer sides of the slot respectively, and the slot inner steel sleeve cooperates with the tenon of the subsequent pipe section.
3. The pipe joint suitable for large-section jacking pipe according to claim 2, characterized in that: The tenon of the subsequent pipe section is fixed with an outer steel collar and an inner steel collar of the tenon, and the outer steel collar and the inner steel collar are respectively fixed to the outer side and the inner side of the tenon.
4. The pipe joint suitable for large-section jacking pipe according to claim 3, characterized in that: The outer steel ring of the notch, the inner steel ring of the notch, the outer steel ring of the tenon and the inner steel ring of the tenon are all fixed with a plurality of oblique anchor steel bars, and the plurality of oblique anchor steel bars are evenly distributed in the corresponding pipe sections.
5. The pipe joint suitable for large-section jacking pipe according to claim 1, characterized in that: An annular rubber gasket is fixed on the inner surface of the pressing block.
6. The pipe joint suitable for large-section jacking pipe according to claim 1, characterized in that: Two waterproof sealing strips are installed around the tenon of the subsequent pipe section on the outside, and the two waterproof sealing strips are respectively located on both sides of the self-waterproof locking device.
7. The pipe joint suitable for large-section jacking pipe according to claim 1, characterized in that: A plurality of first grouting holes and a plurality of second grouting holes are spaced apart at the tenon of the subsequent pipe segment. The plurality of first grouting holes and the plurality of second grouting holes are spaced apart and evenly distributed along the circumference of the subsequent pipe segment respectively. The plurality of first grouting holes are located in the area not covered by the steel collar outside the slot, and the plurality of second grouting holes are located in the area covered by the steel collar outside the slot.
8. The pipe joint suitable for large-section jacking pipe according to claim 1, characterized in that: A plywood is arranged between the preceding pipe section and the subsequent pipe section, and a sealant is arranged on the inner side of the plywood.