Channel joint structure and channel
By setting protruding sockets and spigots in the trench joint structure and filling them with anti-collision material with a low elastic modulus, the problem of joint damage during earthquakes is solved, and the seismic resistance and pipeline stability are improved.
Patent Information
- Application Number
- CN202520150020.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing channel joints are prone to damage during earthquakes due to lateral compression and shearing between the spigot and socket, leading to joint instability.
Design a channel joint structure in which the socket and spigot are respectively provided with protrusions and a caulking joint is formed between them. The caulking joint is filled with an anti-collision material with a low elastic modulus to reduce direct contact and absorb seismic forces.
It effectively reduces collision damage to the spigot and socket during earthquakes, improves the seismic resistance of the joint, and ensures the stability and continuity of the pipeline.
Smart Images
Figure CN223806753U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to pipeline joint technical field, concretely relates to a channel joint structure and channel. BACKGROUND
[0002] The drainage system in nuclear power engineering is a complex system distributed throughout the plant area, which is mainly used for the transportation and discharge of various fluids, including but not limited to cooling water, make-up water, wastewater, etc.
[0003] Underground channels are an important part of the drainage system, and the structural stability of underground channels is directly related to the safe operation and environmental protection of nuclear power plants. In order to prevent the leakage of radioactive substances, underground channels need to have good safety protection. The seismic resistance of underground channels is an important design consideration, aiming to ensure the safety and stability of nuclear power plants in natural disasters such as earthquakes.
[0004] The seismic classification of underground channels in nuclear power engineering is class I, and the annual exceedance probability corresponding to the ultimate safety earthquake is 10 -4 , with high protection level. In contrast, the seismic fortification intensity of civil engineering is generally taken as the seismic intensity with a 10% exceedance probability within 50 years, which is quite different from the former. Therefore, underground channels in nuclear power engineering need special design.
[0005] The joint of the underground channel is used to connect the pipes or components of the underground channel, which ensures the continuity and stability of the entire channel. The joints between the channels are usually connected by inserting the connection part of one end of the pipe into the socket, and the connection part of the other end of the pipe into the socket to realize the connection.
[0006] As shown in Figure 1 and Figure 2 , the existing channel joint includes a socket and a socket, and the socket and the socket are inserted into each other and form a joint. This joint structure will move longitudinally or transversely when subjected to an earthquake, which may cause mutual extrusion and shearing action between the socket and the socket, and easily cause the socket and the socket to collide and damage the channel joint. UTILITY MODEL CONTENTS
[0007] The technical problem to be solved by the utility model is to solve the above-mentioned deficiencies in the prior art, provide a channel joint structure and channel, which can reduce the transverse extrusion and shearing interaction between the socket and the socket when an earthquake occurs, avoid damage to the socket and the socket, improve the seismic resistance of the joint, better protect the joint, and further ensure the stability of the pipe.
[0008] In the first aspect, the utility model embodiment provides a kind of channel joint structure, channel joint structure includes the socket and spigot of relative arrangement, the material of the socket and the socket is identical.The socket includes socket main body part and socket protruding part, the socket protruding part is protruding from socket main body part, and it is stretched out to the socket direction;The socket includes socket main body part and socket protruding part, the socket protruding part is protruding from socket main body part, and it is stretched out to the socket direction;Socket and socket are close, the socket protruding part and the socket protruding part are correspondingly arranged, to make the socket and the socket can be mutually inserted, and the socket and the socket between form caulking.The space between the transverse inner side wall of the socket protruding part and the transverse inner side wall of the socket protruding part is filling space, and the filling space is filled with anti-collision material.The elastic modulus of the anti-collision material is less than the elastic modulus of the material of the socket and the socket.
[0009] In some embodiments, the caulking is provided with caulking sealant at the edge opening to seal the caulking.
[0010] In some embodiments, the elastic modulus of the anti-collision material is greater than the elastic modulus of the caulking sealant.
[0011] In some embodiments, the caulking is further provided with an elastic sealing ring.
[0012] In some embodiments, the socket protruding part and the socket are provided with a first annular notch on the side wall opposite to each other, and the socket main body part and the socket are provided with a second annular notch on the side wall opposite to each other. The number of the elastic sealing ring is two, and the two elastic sealing rings are respectively clamped in the first annular notch and the second annular notch.
[0013] In some embodiments, the transverse outer side wall of the socket protruding part is flush with the transverse outer side wall of the socket. The channel joint structure further comprises a protective plate, which is attached to the transverse outer side wall of the socket protruding part and the transverse outer side wall of the socket, and covers the caulking.
[0014] In some embodiments, the socket protruding part is provided with a detection hole. The detection hole longitudinally penetrates the socket protruding part and communicates with the filling space.
[0015] In some embodiments, the wall thickness of the socket and the socket is D, and the longitudinal dimension d of the anti-collision material satisfies 1 / 4D≤d≤1 / 3D.
[0016] Thus, the utility model discloses a channel joint structure, through setting up socket protruding part and spigot protruding part, and make socket protruding part protrude socket main part, and extend to spigot direction, make spigot protruding part protrude spigot main part, and extend to socket direction, socket protruding part and spigot protruding part correspond to set up, can make socket and spigot can be mutually inserted, through forming the caulking between socket and spigot, can avoid socket and spigot direct contact, thereby reduce socket and spigot and damage when colliding, through forming filling space between the transverse inner side wall of socket protruding part and the transverse inner side wall of spigot protruding part, and fill the anti-collision material in filling space, make the elastic modulus of anti-collision material, less than the elastic modulus of socket and spigot material, can make the rigidity of socket and spigot be greater and be difficult to be extruded and damaged by anti-collision material, therefore when socket and spigot receive lateral force and shearing force when the earthquake occurs, anti-collision material will first deform and absorb part lateral force and shearing force, and because the blocking effect of anti-collision material can avoid socket and spigot and damage when colliding, and the elastic modulus of anti-collision material is smaller, and the rigidity is smaller, also avoided the interaction force between anti-collision material and socket, spigot causes damage to socket and spigot, thereby effectively protecting socket and spigot, further improve the anti-seismic capacity of channel joint structure.
[0017] Secondly, the utility model embodiment further provides a kind of channel, channel includes first pipeline and second pipeline connected with each other, the connecting place of the first pipeline and the second pipeline forms the channel joint structure in the first aspect.
[0018] In some embodiments, the lower side of the channel and the outer side of the two side walls of the channel are provided with vibration isolation baffle and shock-absorbing layer, and the vibration isolation baffle is located outside the shock-absorbing layer.
[0019] The channel provided by the utility model embodiment has the same beneficial effects as the above-mentioned channel joint structure, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a schematic view of a channel joint structure provided by the prior art;
[0021] Figure 2 It is Figure 1 a local enlarged view of M area in figure 6;
[0022] Figure 3 It is a schematic view of a channel joint structure provided by the utility model embodiment;
[0023] Figure 4 It is a schematic view of a socket provided by the utility model embodiment;
[0024] Figure 5A schematic view of a socket provided by the utility model embodiment;
[0025] Figure 6 A schematic view of a channel cross section provided by the utility model embodiment.
[0026] Wherein, 1- socket; 2- socket; 3- socket main part; 4- socket protruding part; 5- socket main part; 6- socket protruding part; 7- caulking; 8- anti-collision material; 9- caulking sealant;
[0027] 10- elastic sealing ring; 11- first annular notch; 12- second annular notch; 13- protection plate;
[0028] 14- detection hole; 15- mounting bolt; 16- vibration isolation baffle; 17- shock absorbing layer; 100- channel. DETAILED DESCRIPTION
[0029] In order to make the skilled in the art better understand the technical scheme of the utility model, the utility model is further described in detail below in combination with the drawings and embodiments.
[0030] Embodiment 1:
[0031] As shown in Figure 3 , the utility model embodiment provides a channel joint structure, which is applied to the connection of pipelines or components.
[0032] As shown in Figure 3 , Figure 4 and Figure 5 , the channel joint structure includes a socket 1 and a socket 2 arranged oppositely, and the materials of the socket 1 and the socket 2 are the same.
[0033] It should be noted that Figure 3 , Figure 4 and Figure 5 only show part of the longitudinal section of the sidewall of the socket 1 and the socket 2. When the channel joint structure is applied to a pipeline, the cross-sectional shape of the socket 1 and the socket 2 is a circular ring, Figure 3 , Figure 4 and Figure 5 , the mark "(inner)" indicates that the side is the inner side of the ring, and the mark "(outer)" indicates that the side is the outer side of the ring; it can be understood that the cross-sectional shape of the socket 1 and the socket 2 can also be other rings, for example, a rectangle.
[0034] For example, the materials of the socket 1 and the socket 2 can both be common concrete,
[0035] In other examples, the materials of the socket 1 and the socket 2 can also be metal.
[0036] The socket 1 comprises a socket body part 3 and a socket protruding part 4, the socket protruding part 4 protruding from the socket body part 3 and extending towards the spigot 2. The spigot 2 comprises a spigot body part 5 and a spigot protruding part 6, the spigot protruding part 6 protruding from the spigot body part 5 and extending towards the socket 1. When the socket 1 and the spigot 2 are brought together, the socket protruding part 4 and the spigot protruding part 6 are correspondingly arranged, so that the socket 1 and the spigot 2 can be inserted into each other, and a joint 7 is formed between the socket 1 and the spigot 2.
[0037] In combination Figure 3 , Figure 4 and Figure 5 , the socket protruding part 4 and the spigot protruding part 6 are correspondingly arranged, which means that when the socket protruding part 4 is arranged close to the outer side of the socket 1, the spigot protruding part 6 is arranged close to the inner side of the spigot 2, so that the socket 1 and the spigot 2 can be inserted into each other.
[0038] In Figure 4 , the recessed area below the socket protruding part 4 forms the insertion space of the spigot protruding part 6; in Figure 5 , the recessed area above the spigot protruding part 6 forms the insertion space of the socket protruding part 4.
[0039] For example, the width of the joint 7 can be flexibly set according to the site conditions.
[0040] For example, the width of the joint 7 can be flexibly set according to the site conditions. For example, when the anti-seismic requirement is high, the width of the joint 7 can be set to be larger (for example, 3 cm); when the anti-seismic requirement is low, the width of the joint 7 can be set to be smaller (for example, 2 cm).
[0041] The joint 7 can avoid the direct contact between the socket 1 and the spigot 2, thereby reducing the damage caused by the collision between the socket 1 and the spigot 2 during the earthquake.
[0042] In combination Figure 3 , Figure 4 and Figure 5 , the space between the lateral inner side wall 4A of the socket protruding part 4 and the lateral inner side wall 6A of the spigot protruding part 6 is a filling space Q, and the filling space Q is filled with an anti-collision material 8. The elastic modulus of the anti-collision material 8 is smaller than the elastic modulus of the materials of the socket 1 and the spigot 2.
[0043] For example, as shown in Figure 3 , the filling space Q is located at the middle position in the longitudinal direction of the socket 1 and the spigot 2.
[0044] For example, the lateral inner side wall 4A of the socket protruding part 4 and the lateral inner side wall 6A of the spigot protruding part 6 are both horizontally arranged, and the cross-sectional shape of the filling space Q is rectangular.
[0045] Alternatively, the transverse inner side wall 4A of the socket protrusion 4 and the transverse inner side wall 6A of the spigot protrusion 6 are both inclined and arranged in parallel, so that the cross-sectional shape of the filling space Q is a parallelogram, and the transverse inner side wall 4A of the socket protrusion 4 and the transverse inner side wall 6A of the spigot protrusion 6 can guide the mutual insertion of the socket 1 and the spigot 2. The cross-sectional shape of the filling space Q is not limited in the embodiments of the utility model.
[0046] The elastic modulus refers to the ratio of stress to strain of a material in the elastic deformation stage. The greater the elastic modulus, the smaller the strain generated by the material under the same stress, indicating that the material is more difficult to elastically deform and has greater stiffness. Therefore, when subjected to the same force, the socket 1 and the spigot 2 have greater stiffness and are more difficult to be damaged compared to the anti-collision material 8.
[0047] For example, when the materials of the socket 1 and the spigot 2 are both concrete (the elastic modulus of concrete is 30000 MPa-380000 MPa), the elastic modulus of the socket 1 and the spigot 2 is 30000 MPa-380000 MPa, and the material of the anti-collision material 8 can be semi-rigid foam plastic (such as polyurethane foam, polypropylene foam, etc.) with an elastic modulus of 400 MPa-700 MPa.
[0048] As shown in Figure 3 After the filling space Q is filled with the anti-collision material 8, the anti-collision material 8 abuts against the transverse inner side wall 4A of the socket protrusion 4, the transverse inner side wall 6A of the spigot protrusion 6, the socket main body 3, and the spigot main body 5.
[0049] When an earthquake occurs, the socket 1 and the spigot 2 can be subjected to transverse force and longitudinal shear force. When the socket 1 and the spigot 2 are subjected to transverse force and shear force, the anti-collision material 8 will first deform to absorb part of the transverse force and shear force, and because of the blocking effect of the anti-collision material 8, direct collision between the socket 1 and the spigot 2 can be avoided to prevent damage. At the same time, the anti-collision material 8 has a small elastic modulus and small stiffness, which also avoids the interaction between the anti-collision material 8 and the socket 1 and the spigot 2 from causing damage to the socket 1 and the spigot 2, thereby effectively protecting the socket 1 and the spigot 2 and improving the anti-seismic capability of the trench joint structure.
[0050] Thus, the channel joint structure provided by the embodiment of the utility model, through setting the socket protruding part 4 and the socket protruding part 6, and making the socket protruding part 4 protrude from the socket main part 3 and extend to the socket 2 direction, and making the socket protruding part 6 protrude from the socket main part 5 and extend to the socket 1 direction, the socket protruding part 4 and the socket protruding part 6 are correspondingly set, so that the socket 1 and the socket 2 can be mutually inserted; by forming the caulking 7 between the socket 1 and the socket 2, the direct contact of the socket 1 and the socket 2 can be avoided, so that the damage of the socket 1 and the socket 2 caused by collision during the earthquake can be reduced; by forming the filling space Q between the transverse inner side wall 4A of the socket protruding part 4 and the transverse inner side wall 6A of the socket protruding part 6, and filling the anti-collision material 8 in the filling space Q, the elastic modulus of the anti-collision material 8 is less than the elastic modulus of the material of the socket 1 and the socket 2, so that the rigidity of the socket 1 and the socket 2 is greater and the anti-collision material 8 is difficult to be extruded and damaged; therefore, when the socket 1 and the socket 2 are subjected to the transverse force and the shear force during the earthquake, the anti-collision material 8 will first deform to absorb part of the transverse force and the shear force, and because of the blocking effect of the anti-collision material 8, the direct collision and damage of the socket 1 and the socket 2 can be avoided; at the same time, because the elastic modulus of the anti-collision material 8 is small, the rigidity is small, and the interaction force between the anti-collision material 8 and the socket 1 and the socket 2 can also avoid damaging the socket 1 and the socket 2, so that the socket 1 and the socket 2 are effectively protected, and the anti-seismic ability of the channel joint structure is further improved.
[0051] It can be understood that the size of the filling space Q is the same as the size of the anti-collision material 8.
[0052] In some embodiments, as shown in Figure 3 The wall thickness of the socket 1 and the socket 2 is D, and the longitudinal size d of the anti-collision material 8 satisfies 1 / 4D≤d≤1 / 3D.
[0053] For example, when the wall thickness of the socket 1 and the socket 2 is 30cm, the longitudinal size d of the anti-collision material 8 can be 7.5cm, 9cm or 10cm, etc.
[0054] Through the above setting, the longitudinal size d of the anti-collision material 8 can be in a suitable range, so that the longitudinal size d of the anti-collision material 8 is not too large to affect the longitudinal size of the socket protruding part 4 and the socket protruding part 6, so as to maintain the strength of the socket protruding part 4 and the socket protruding part 6, and the longitudinal size d of the anti-collision material 8 is not too small to be difficult to absorb the transverse force and the shear force, so as to maintain the anti-collision effect of the anti-collision material 8 on the socket 1 and the socket 2.
[0055] In some examples, the transverse size of the anti-collision material 8 can be substantially the same as the longitudinal size d of the anti-collision material 8.
[0056] In some embodiments, as shown inFigure 3 As shown, a sealant 9 is provided at the edge opening of the caulking joint 7 to seal the caulking joint 7.
[0057] For example, the caulking sealant 9 is a sealant for concrete building joints. The outer caulking sealant 9 is a low modulus grade (e.g., tensile modulus generally less than 0.4 MPa) sealant for concrete building joints, and the inner caulking sealant 9 is a high modulus grade (e.g., tensile modulus greater than 1.0 MPa) sealant for concrete building joints, in order to withstand the deformation caused by the relative displacement of the socket 1 and the spigot 2.
[0058] The above settings can increase the sealing and waterproof / corrosion-resistant properties of the caulking.
[0059] In some embodiments, the elastic modulus of the anti-collision material 8 is greater than that of the caulking sealant 9.
[0060] With the above settings, the rigidity of the caulking sealant 9 is less than that of the anti-collision material 8. When the socket 1 and the spigot 2 undergo the same deformation, the caulking sealant 9 is more likely to deform and avoid being damaged. Thus, the greater rigidity of the anti-collision material 8 can be used to protect the caulking sealant 9 and prevent it from being crushed.
[0061] In some embodiments, such as Figure 3 As shown, an elastic sealing ring 10 is also provided in the caulking joint 7.
[0062] For example, the number of resilient sealing rings 10 can be one, two, or three, etc.
[0063] For example, the elastic sealing ring 10 can be a water-swellable rubber composite sealing ring or a butyl putty rubber composite sealing ring.
[0064] The above settings can further enhance the sealing, waterproofing, and corrosion resistance of the caulking 7 through the elastic sealing ring 10.
[0065] In some embodiments, such as Figure 3 As shown, a first annular recess 11 is provided on the side wall opposite to the socket 2 of the socket protrusion 4, and a second annular recess 12 is provided on the side wall opposite to the socket 2 of the socket body 3. There are two elastic sealing rings 10, which are respectively engaged in the first annular recess 11 and the second annular recess 12.
[0066] For example, the cross-sectional shape of the first annular notch 11 and the second annular notch 12 is wedge-shaped, and the cross-sectional shape of the elastic sealing ring 10 is also wedge-shaped, which facilitates the insertion and positioning of the elastic sealing ring 10.
[0067] Through the above setting, the elastic sealing ring 10 can be positioned in the first annular recess 11 and the second annular recess 12, and displacement of the first annular recess 11 and the second annular recess 12 is avoided.
[0068] In some embodiments, in combination with Figure 3 、 Figure 4 and Figure 5 , the transverse outer side wall of the socket protrusion 4 is flush with the transverse outer side wall of the spigot 2.
[0069] In the embodiment, the channel joint structure further comprises a protective plate 13, which is attached to the transverse outer side wall of the socket protrusion 4 and the transverse outer side wall of the spigot 2, and covers the caulking 7.
[0070] For example, the protective plate 13 can be an aluminum plate or a steel plate, etc. The protective plate 13 is fixed to the socket 1 by mounting bolts 15.
[0071] Through the above setting, the caulking 7 can be protected by the protective plate 13 from the outside, which can effectively prevent the caulking sealant 9 from falling off, thereby further increasing the sealing and waterproof and corrosion resistance of the caulking 7.
[0072] In some embodiments, as shown in Figure 3 , the spigot protrusion 6 is provided with a detection hole 14. The detection hole 14 longitudinally penetrates the spigot protrusion 6 and communicates with the filling space Q.
[0073] Through the detection hole 14, the condition of the anti-collision material 8 in the filling space Q (such as whether the structure is damaged) can be easily checked, so as to facilitate the later maintenance of the channel joint structure.
[0074] Embodiment 2:
[0075] The utility model embodiment provides a kind of channel, which can be applied to the drainage system of nuclear power plant.The channel includes first pipeline and second pipeline connected with each other, and the connecting place of first pipeline and second pipeline forms the channel joint structure in embodiment 1.
[0076] For example, the first pipeline and the second pipeline can both be made of concrete. The cross-sectional shape of the first pipeline and the second pipeline is rectangular, and the corners of the inner side walls of the first pipeline and the second pipeline are provided with chamfers.
[0077] For example, the cross section of the first pipeline and the second pipeline is a square with a side length of 400 cm, and the wall thickness of the first pipeline and the second pipeline is 50 cm. The side length of the above chamfer is 20 cm.
[0078] For example, the spigot 2 and the socket 1 in the channel joint structure can be used to connect the first pipeline and the second pipeline, the spigot 2 is located at one end of the first pipeline, and the socket 1 is located at one end of the second pipeline.
[0079] According to the need, the socket 2 and the socket 1 can be integrally formed with the corresponding first pipeline and the second pipeline, or can be fixed to the corresponding first pipeline and the second pipeline by other means.
[0080] The materials of the socket 2 and the socket 1 can be the same as the materials of the first pipeline and the second pipeline, that is, the materials of the socket 2 and the socket 1 are concrete. In this case, the socket 2 and the socket 1 can be prefabricated by a concrete material to facilitate direct assembly and connection at the construction site, or the socket 2 and the socket 1 can be directly formed at the construction site.
[0081] Through the above arrangement, the anti-seismic ability of the trench joint structure in the trench can be improved, and the anti-seismic ability of the entire trench is also improved, thereby reducing the damage of the trench in the earthquake.
[0082] In some embodiments, as shown in Figure 6 The lower side of the trench 100 and the outer side of the two side walls of the trench are provided with a vibration isolation baffle 16 and a shock absorption layer 17, and the vibration isolation baffle 16 is located outside the shock absorption layer 17.
[0083] For example, as shown in Figure 6 The entire trench 100 is buried in the soil.
[0084] For example, the vibration isolation baffle 16 can be made of wood, rubber, or other materials with certain strength and elasticity. The shock absorption layer 17 can be configured by bentonite, which has the characteristics of high water content, high viscosity, and low stiffness, and also has the characteristics of large damping and large energy consumption.
[0085] For example, the thickness of the vibration isolation baffle 16 and the shock absorption layer 17 can be flexibly set according to the size of the trench. For example, the cross section of the trench is a square with a side length of 400 cm, the thickness of the vibration isolation baffle 16 is 20 cm, and the thickness of the shock absorption layer 17 is 30 cm.
[0086] The vibration isolation baffle 16 can reflect part of the vertical and horizontal seismic waves, reducing the seismic energy reaching the trench structure. The shock absorption layer 17 has the characteristics of small stiffness and large damping, which can further absorb seismic energy to reduce the transmission of seismic energy to the trench 100, thereby effectively reducing the effect of the earthquake on the underground trench. Of course, the vibration isolation baffle 16 and the shock absorption layer 17 can be arranged at other positions of the trench (such as the outer side of the first pipeline and the second pipeline), or can be arranged along the entire length of the trench.
[0087] Through the above arrangement, the anti-seismic ability of the trench 100 in the local or entire range with high anti-seismic requirements can be further reduced.
[0088] It can be understood that the above implementation is only an exemplary embodiment for illustrating the principle of the present application, but the present application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present application, and these modifications and improvements are also considered as the protection scope of the present application.
Claims
1. A trench junction structure, characterized by, The socket (1) and the spigot (2) are made of the same material; The socket (1) comprises a socket body part (3) and a socket protruding part (4) which protrudes from the socket body part (3) and extends towards the spigot (2); the spigot (2) comprises a spigot body part (5) and a spigot protruding part (6) which protrudes from the spigot body part (5) and extends towards the socket (1); when the socket (1) and the spigot (2) are brought together, the socket protruding part (4) and the spigot protruding part (6) are arranged correspondingly so that the socket (1) and the spigot (2) can be inserted into each other, and a joint (7) is formed between the socket (1) and the spigot (2); The space between the lateral inner side wall of the socket protruding part (4) and the lateral inner side wall of the spigot protruding part (6) is a filling space, and the filling space is filled with an anti-collision material (8); The elastic modulus of the anti-collision material (8) is smaller than the elastic modulus of the material of the socket (1) and the spigot (2).
2. The trench junction structure of claim 1, wherein, The edge opening of the joint (7) is provided with a joint sealant (9) to seal the joint (7).
3. The trench junction structure of claim 2, wherein, The elastic modulus of the anti-collision material (8) is greater than the elastic modulus of the joint sealant (9).
4. The trench junction structure of claim 2, wherein, The joint (7) is further provided with an elastic sealing ring (10).
5. The trench joint structure according to claim 4, wherein, The socket protruding part (4) is provided with a first annular notch (11) on the side wall opposite to the spigot (2), and the socket body part (3) is provided with a second annular notch (12) on the side wall opposite to the spigot (2); The number of the elastic sealing rings (10) is two, and the two elastic sealing rings (10) are respectively clamped in the first annular notch (11) and the second annular notch (12).
6. The trench junction structure of claim 4, wherein The lateral outer side wall of the socket protruding part (4) is flush with the lateral outer side wall of the spigot (2); The trench joint structure further comprises a protection plate (13) which is arranged on the lateral outer side wall of the socket protruding part (4) and the lateral outer side wall of the spigot (2) and covers the joint (7).
7. The trench junction structure of claim 1, wherein The spigot protruding part (6) is provided with a detection hole (14); The detection hole (14) longitudinally penetrates the spigot protruding part (6) and communicates with the filling space.
8. The trench junction structure of claim 1, wherein, The wall thickness of the socket (1) and the spigot (2) is D, and the longitudinal dimension d of the anti-collision material (8) satisfies 1 / 4D≤d≤1 / 3D.
9. A channel, characterized by The first pipe and the second pipe are connected to each other, and the connection part of the first pipe and the second pipe forms the trench joint structure according to any one of claims 1-8.
10. The channel of claim 9, wherein, The lower side of the trench and the outer side of the two side walls of the trench are both provided with a vibration isolation baffle (16) and a shock absorption layer (17), and the vibration isolation baffle (16) is located on the outer side of the shock absorption layer (17).