A pipe section and construction method for composite stratum top pipe construction

Abstract

The present invention discloses a pipe joint and a construction method for composite stratum jacking pipe construction, and relates to the technical field of jacking pipe construction. The pipe joint for composite stratum jacking pipe construction comprises a pipe joint body, the inner wall of the rear end of the pipe joint body is provided with an annular wave surface 1, the inner wall of the front end of the pipe joint body is provided with an annular wave surface 2, the front end face of the pipe joint body is provided with a receiving chamber connected with the annular wave gap, the receiving chamber is provided with an annular capsule, the annular capsule is filled with sealant, the rear end of the pipe joint body is provided with an insert adapted to the receiving chamber, when the insert is inserted, the outer wall of the insert abuts against the outer wall of the receiving chamber, after the insert is inserted, the annular capsule squeezed by the insert releases the sealant to fill the annular wave gap. The construction method comprises the steps of construction preparation, foundation pit construction, jacking machine installation, jacking pipe construction, etc. The pipe joint and the construction method for composite stratum jacking pipe construction have the beneficial effects of good sealing effect and long sealing life.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking construction, and in particular to a pipe section and a construction method for pipe jacking construction in composite formations. Background Art

[0002] Pipe jacking construction is a pipeline burial construction technology that does not involve excavation or requires little excavation. In the working pit, the jacking force generated by the jacking equipment is used to overcome the friction between the pipeline and the surrounding soil, and the pipeline is pushed into the soil according to the designed slope, and the soil is transported away. After one section of the pipe is pushed into the soil layer, the second section of the pipe is pushed in. Pipe jacking technology is widely used in the laying, replacement and repair of various pipelines across roads, railways, rivers, downtown areas, etc. where excavation is not allowed or not available. Because pipe jacking construction technology has the advantages of low comprehensive cost, short construction period, small environmental impact, and good construction safety, it is widely used in the construction of underground pipelines such as municipal water supply and drainage, communication cables, gas pipelines, and power cables.

[0003] In existing pipe jacking construction, for composite formations, sealing treatment is required between two pipe sections to avoid water seepage in the pipe sections. The most commonly used sealing method is to use rubber rings pre-glued to the pipe sections between adjacent pipe sections. The front end of the subsequent pipe section squeezes the rubber ring during the jacking process to achieve a sealing effect. However, the rubber ring can easily cause the two pipe sections to be misaligned during the jacking process, and the sealing effect is difficult to guarantee. In addition, the underground environment is complex, and the rubber ring is prone to aging and failure after long-term use, and the sealing effect is difficult to guarantee for a long time. Therefore, the existing technology needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the rubber ring in the prior art has poor sealing effect and short sealing life. The purpose is to provide a pipe joint and a construction method for composite formation top pipe construction, which adopts corresponding technical means and has the beneficial effects of good sealing effect and long sealing life.

[0005] The present invention is achieved through the following technical solutions:

[0006] A pipe joint for composite formation top pipe construction, comprising a pipe joint body, the inner wall of the rear end of the pipe joint body is provided with an annular wave surface 1, the front end of the pipe joint body is provided with an annular wave surface 2, after the two pipe joint bodies are connected, an annular wave gap is provided between the annular wave surface 1 and the annular wave surface 2 at the connection point, the front end face of the pipe joint body is provided with a accommodating chamber connected to the annular wave gap, the accommodating chamber is provided with an annular capsule, the annular capsule is filled with sealant, the rear end of the pipe joint body is provided with an insert adapted to the accommodating chamber, when the insert is inserted, the outer wall of the insert abuts against the outer wall of the accommodating chamber, after the insert is inserted, the annular capsule squeezed by the insert releases the sealant to fill the annular wave gap.

[0007] Furthermore, in the present invention, the rear end of the pipe segment body is provided with a shoulder, and the front end of the pipe segment body is provided with an abutting end surface that abuts against the shoulder after insertion.

[0008] Furthermore, in the present invention, the outer wall of the above-mentioned pipe segment body is provided with a long groove parallel to the center line, a fixed rod is arranged in the long groove, the head of the fixed rod is facing the forward direction of the pipe segment body, the tail of the fixed rod is hinged to the pipe segment body, and the pipe segment body is provided with a locking mechanism connected to the fixed rod.

[0009] Furthermore, in the present invention, a sliding groove is provided at the bottom of the above-mentioned long groove, the locking mechanism includes an electric push rod and an L-shaped clamp 1 installed in the sliding groove, and the fixed plug rod is provided with an L-shaped clamp 2 that cooperates with the L-shaped clamp 1.

[0010] Furthermore, in the present invention, the pipe segment body is provided with a torsion spring for driving the fixed insertion rod to rotate outward, and the surface of the fixed insertion rod is provided with barbs.

[0011] Furthermore, in the present invention, the inner side wall of the annular capsule is provided with an easy-tear line.

[0012] Furthermore, in the present invention, the pipe segment body is provided with a wing plate for preventing rotation, the wing plate is located in the middle of the pipe segment body, and a plurality of the wing plates are evenly distributed around the pipe segment body.

[0013] Furthermore, in the present invention, the thickness of the wing plate gradually increases from front to back.

[0014] In a second aspect, the present invention further provides a method for constructing a pipe segment for composite formation top pipe construction, which comprises the following steps:

[0015] S1. Construction preparation: determine the scope of the construction area, conduct geological survey and design, determine the starting and ending points of the pipe jacking, as well as the path and depth of the pipe jacking, and ensure the alert of the construction area and clear obstacles in the construction area;

[0016] S2. Foundation pit construction: Use excavation equipment to dig the foundation pit according to the diameter and depth determined by the design requirements. During excavation, pay attention to avoid conflicts with underground pipelines and other obstacles;

[0017] S3. Installation of pipe jacking machine: first, cast the back wall in the foundation pit, and install the reaction steel plate vertically on the ground in front of the back wall; then lay the guide rail parallel to the bottom of the pipe jacking path in the foundation pit to define the direction of pipe jacking; then install the pipe jacking machine in the foundation pit, with the rear side of the pipe jacking machine against the reaction steel plate, and the front side of the pipe jacking machine is installed with a jacking iron for jacking; finally, use a crane to lift the tunnel boring machine onto the guide rail in the foundation pit, and the pipe jacking machine pushes the head of the tunnel boring machine into the excavation hole,

[0018] S4. Pipe jacking construction: Use a crane to lift the pipe section used for composite stratum pipe jacking construction onto the guide rail in the foundation pit. The tunnel boring machine and the pipe jacking machine work simultaneously. The tunnel boring machine excavates the soil in front, and the pipe jacking machine pushes the pipe section used for composite stratum pipe jacking construction to move forward along with the tunnel boring machine.

[0019] S5. Repeat step S4 until all pipe sections for composite formation pipe jacking construction are installed in place.

[0020] Furthermore, in the present invention, the jacking speed of the pipe jacking machine in the above-mentioned pipe jacking construction step is not more than 6 meters per hour, and mud is injected in the pipe jacking construction step to lubricate the outer wall of the pipe segment used for the composite formation pipe jacking construction.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] The present invention provides a pipe section for composite formation jacking construction, wherein an annular capsule filled with sealant is installed inside a receiving chamber at the front end of the pipe section body. During the jacking process, the front end of the rear pipe section body contacts the rear end of the front pipe section body, and the insert of the front pipe section body is inserted into the receiving chamber of the rear pipe section body to break the annular capsule and release the sealant. Since the outer wall of the insert abuts against the outer wall of the receiving chamber, the sealant will only flow into the annular wave gap between the annular wave surface 1 and the annular wave surface 2, and the sealant will seal the annular wave gap after it dries. The sealing does not use a rubber ring, and the rubber ring will not be misplaced during the jacking process, thereby ensuring a better sealing effect. Since the outer wall of the insert abuts against the outer wall of the receiving chamber, the sealant is less affected by the external environment, and the service life of the sealant is longer.

[0023] The present invention also provides a construction method, including the steps of construction preparation, foundation pit construction, pipe jacking machine installation, pipe jacking construction, etc., and also adopts pipe sections for composite stratum pipe jacking construction, which can achieve better sealing effect over a longer period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 It is a schematic diagram of the interior of a pipe section for composite formation jacking construction of the present invention (the fixed plug rod is not unfolded);

[0026] Figure 2 It is a schematic diagram of the interior of a pipe section for composite formation jacking construction of the present invention (the fixed plug rod has been unfolded);

[0027] Figure 3 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0028] Figure 4 It is a schematic diagram of the insert of the present invention before insertion;

[0029] Figure 5 It is a schematic diagram of the insert of the present invention after being inserted;

[0030] Figure 6 Schematic diagram of the annular capsule of the present invention.

[0031] Markings and corresponding parts names in the attached drawings: 1- pipe segment body, 101- annular wave surface one, 102- annular wave surface two, 103- insert, 104- shoulder, 105- abutment end face, 106- long groove, 107- slide groove, 2- annular wave gap, 3- containing chamber, 4- annular capsule, 401- easy tear line, 5- sealant, 6- fixed plug rod, 601- L-shaped clamp two, 7- locking mechanism, 701- electric push rod, 702- L-shaped clamp one, 8- wing plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, "multiple" means at least 2. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] Embodiment 1, combination Figures 1 to 6 As shown, a pipe segment for composite formation top pipe construction according to implementation 1 of the present invention is shown, and the specific structure is described as follows.

[0035] Please refer to Figure 1 As shown, the pipe segment used for composite formation top pipe construction of this embodiment 1 is mainly composed of a cylindrical pipe segment body 1. The pipe segment body 1 is generally cast with concrete. In order to increase the structural strength of the pipe segment body 1, a steel mesh can be installed in the template before casting.

[0036] Further, such as Figure 1 As shown, the pipe section used for composite formation jacking construction is pushed in from right to left, that is, the left end of the pipe section body 1 is the front end, and the right end of the pipe section body 1 is the rear end. An annular accommodating chamber 3 is provided on the front end surface of the pipe section body 1, and the cross section of the accommodating chamber 3 is approximately a U-shaped groove.

[0037] Reference Figure 1 and Figure 4As shown, the inner side of the accommodating chamber 3 protrudes forward by one section compared with the outer side of the accommodating chamber 3, and the inner side of the accommodating chamber 3 (the side close to the center line of the pipe segment body 1) is provided with a transverse annular wave surface 102. Correspondingly, an annular insert 103 is fixedly installed on the right end face of the pipe segment body 1, and the cross section of the insert 103 is approximately convex. After the two pipe segment bodies 1 are aligned, the insert 103 can be inserted into the accommodating chamber 3. The inner wall of the insert 103 (the side wall close to the center line of the pipe segment body 1) is provided with a transverse annular wave surface 101.

[0038] Further, combined with Figure 4 and Figure 5 As shown, an annular capsule 4 is installed in the accommodating chamber 3. The annular capsule 4 is made of plastic material, and the interior of the annular capsule 4 is filled with sealant 5. Before the pipe segment body 1 is ready to be hoisted to the guide rail, the annular capsule 4 is pre-installed in the accommodating chamber 3, and the annular capsule 4 and the pipe segment body 1 are bonded and fixed with adhesive.

[0039] Combination Figure 4 and Figure 5 As shown, after the two pipe segments 1 are aligned, the pipe jacking machine pushes the rear pipe segment 1 close to the front pipe segment 1. During the close process, the insert 103 is inserted into the accommodating chamber 3, and the annular capsule 4 is squeezed to release the paste-like sealant 5 inside. Since the outer diameter of the insert 103 is the same as the outer diameter of the accommodating chamber 3, the outer wall of the insert 103 abuts against the outer wall of the accommodating chamber 3 when the insert 103 is inserted, so as to prevent the sealant 5 from overflowing after release. Figure 5 As shown, after the insert 103 is inserted, an annular wave gap 2 is formed between the annular wave surface 101 and the annular wave surface 2 102, and the annular wave gap 2 is connected to the inner side of the accommodating chamber 3. The released sealant 5 is automatically squeezed into the annular wave gap 2, and plays a sealing role after the sealant 5 dries, thereby avoiding water seepage at the connection between the two pipe segment bodies 1.

[0040] It should be noted that if Figure 6 As shown, an easy-tear line 401 is processed on the inner wall of the annular capsule 4. The easy-tear line 401 is a common design in plastic products. The easy-tear line 401 is easier to break, which facilitates the extrusion of the sealant 5. The annular capsule 4 has a filling nozzle. After the annular capsule 4 is sleeved in the accommodating chamber 3, the sealant 5 is filled into the annular capsule 4 from the filling nozzle through a pump, and finally the filling nozzle is blocked or tightened to seal. The sealant 5 can be an anti-seepage water glue in the prior art, such as AB glue or potting glue.

[0041] Combination Figure 4 and Figure 5As shown, a shoulder 104 in the form of an axial shoulder is provided at the rear end of the pipe segment body 1, and an abutting end face 105 is provided at the front end of the pipe segment body 1, and the abutting end face 105 is located at the inner wall end face of the accommodating chamber 3. When the two pipe segment bodies 1 are butted, the abutting end face 105 and the shoulder 104 abut against each other, thereby reducing the impact of the fluid (such as sewage, etc.) inside the pipe segment body 1 on the sealant 5, and extending the service life of the sealant 5.

[0042] In some implementations of this embodiment, combined with Figure 1 As shown, four wing plates 8 are installed on the outer wall of a pipe segment body 1, and the wing plates 8 can prevent the pipe segment body 1 from rotating during the jacking process. The wing plate 8 is located in the middle of the pipe segment body 1, and the four wing plates 8 are evenly distributed around the pipe segment body 1. The thickness of the wing plate 8 facing forward is relatively thin, which is convenient for breaking the soil during jacking and reducing the impact of the wing plate 8 on excavation. The thickness of the wing plate 8 gradually increases from the front to the back, and the increased thickness prevents the wing plate 8 from being easily deformed due to insufficient rigidity.

[0043] In some implementations of this embodiment, combined with Figure 1 and Figure 2 As shown, a plurality of fixed plug rods 6 are evenly installed on the side wall of the pipe segment body 1, which play a role in fixing the installed pipe segment body 1. A long groove 106 is opened on the outer wall of the pipe segment body 1, and a hinge support is fixedly installed on the right side of the long groove 106, and the hinge support is fixedly connected to the right end of the fixed plug rod 6. The fixed plug rod 6 can rotate around the hinge support. A torsion spring is installed on the axis of the hinge support that passes through the fixed plug rod 6, and the torsion spring is also connected to the fixed plug rod 6. The torsion spring has a tendency to drive the fixed plug rod 6 to expand.

[0044] Combination Figure 1 , Figure 2 and Figure 3 As shown, the front end of the fixed plug rod 6 is a pointed tip, and an L-shaped clamp 2 601 with an L-shaped side is fixedly installed on one side of the fixed plug rod 6 close to the center of the pipe section body 1, and a slide groove 107 is provided at the bottom of the long groove 106. The locking mechanism 7 includes an electric push rod 701 and an L-shaped clamp 1 702. The electric push rod 701 and the L-shaped clamp 1 702 are both installed in the slide groove 107. The electric push rod 701 is connected to the L-shaped clamp 1 702. The L-shaped clamp 1 702 is an inverted L shape. After the L-shaped clamp 1 702 moves to the left, the L-shaped clamp 1 702 and the L-shaped clamp 2 601 are interlocked to prevent the fixed plug rod 6 from being unfolded. The fixed plug rod 6 plays a fixing role on the pipe section body 1.

[0045] It should be noted that when the pipe segment body 1 is still a short distance away from completing all installation, the electric push rod 701 is controlled to drive the L-shaped clamp 1 702 to retreat, and the L-shaped clamp 1 702 and the L-shaped clamp 2 601 are separated, and the fixed plug 6 has a tendency to expand outward under the action of the torsion spring. As the pipe segment body 1 continues to move forward, the fixed plug 6 is continuously expanded. When the pipe segment body 1 is fully installed, the fixed plug 6 is expanded as shown in FIG. Figure 2 The surface of the fixed plug rod 6 is provided with barbs to enhance the fixing effect of the fixed plug rod 6 .

[0046] Embodiment 2: This embodiment provides a construction method, which uses the pipe section for composite stratum jacking construction in embodiment 1. It includes four parts: construction preparation, foundation pit construction, jacking machine installation, and jacking construction.

[0047] During construction preparation, determine the scope of the construction area, conduct geological surveys and designs, determine the starting and ending points of the pipe jacking, as well as the path and depth of the pipe jacking, and ensure that the construction area is well guarded and obstacles are cleared in the construction area;

[0048] During foundation pit construction, use excavation equipment to dig the foundation pit according to the diameter and depth determined by the design requirements. During excavation, pay attention to avoid conflicts with underground pipelines and other obstacles;

[0049] When installing the pipe jacking machine, first cast the back wall in the foundation pit, and install the reaction steel plate vertically on the ground in front of the back wall; then lay the guide rail parallel to the bottom of the pipe jacking path in the foundation pit to define the direction for the pipe jacking; then install the pipe jacking machine in the foundation pit, with the rear side of the pipe jacking machine against the reaction steel plate, and the front side of the pipe jacking machine is installed with a jacking iron for jacking; finally, use a crane to lift the tunnel boring machine onto the guide rail in the foundation pit, and the pipe jacking machine pushes the head of the tunnel boring machine into the excavation hole,

[0050] During pipe jacking construction, a crane is used to lift the pipe sections used for composite stratum pipe jacking construction onto the guide rails in the foundation pit. The tunneling machine and the pipe jacking machine work simultaneously. The tunneling machine excavates the soil in front, and the pipe jacking machine pushes the pipe sections used for composite stratum pipe jacking construction forward along with the tunneling machine.

[0051] Repeat the pipe jacking construction steps until all pipe sections for composite formation pipe jacking construction are installed in place.

[0052] During the pipe jacking construction step, the jacking speed of the pipe jacking machine is 5 meters per hour or 6 meters per hour. During the pipe jacking construction step, mud is injected to lubricate the outer wall of the pipe section used for composite formation pipe jacking construction, making jacking easier.

[0053] The working principle of the pipe section and construction method for composite stratum top pipe construction of the present invention is as follows:

[0054] During the jacking process, the front end of the rear pipe section body 1 contacts the rear end of the front pipe section body 1, and the insert 103 of the front pipe section body 1 is inserted into the accommodating chamber 3 of the rear pipe section body 1, squeezing the annular capsule 4 and releasing the sealant 5. Since the outer wall of the insert 103 abuts against the outer wall of the accommodating chamber 3, the sealant 5 will only flow into the annular wave gap 2 between the annular wave surface 1 101 and the annular wave surface 2 102, and the sealant 5 seals the annular wave gap 2 after drying. The rubber ring is not used for sealing, and the rubber ring will not be misplaced during the jacking process, ensuring a good sealing effect. Since the outer wall of the insert 103 abuts against the outer wall of the accommodating chamber 3, the sealant 5 is less affected by the external environment, and the service life of the sealant 5 is longer.

[0055] In summary, the present invention provides a pipe segment for composite formation top pipe construction, which includes a pipe segment body 1, the inner wall of the rear end of the pipe segment body 1 is provided with an annular wave surface 101, the front end of the pipe segment body 1 is provided with an annular wave surface 2 102, after the two pipe segment bodies 1 are connected, an annular wave gap 2 is provided between the annular wave surface 101 and the annular wave surface 2 102 at the connection, the front end face of the pipe segment body 1 is provided with a accommodating chamber 3 connected with the annular wave gap 2, the accommodating chamber 3 is provided with an annular capsule 4, the annular capsule 4 is filled with sealant 5, the rear end of the pipe segment body 1 is provided with an insert 103 adapted to the accommodating chamber 3, when the insert 103 is inserted, the outer wall of the insert 103 abuts against the outer wall of the accommodating chamber 3, after the insert 103 is inserted, the annular capsule 4 squeezed by the insert 103 releases the sealant 5 to fill the annular wave gap 2. The rear end of the pipe segment body 1 is provided with a shoulder 104, and the front end of the pipe segment body 1 is provided with an abutting end face 105 that abuts against the shoulder 104 after insertion. The outer wall of the pipe segment body 1 is provided with a long groove 106 parallel to the center line, and a fixed plug rod 6 is provided in the long groove 106. The head of the fixed plug rod 6 faces the forward direction of the pipe segment body 1, and the tail of the fixed plug rod 6 is hinged with the pipe segment body 1. The pipe segment body 1 is provided with a locking mechanism 7 connected to the fixed plug rod 6. A sliding groove 107 is provided at the bottom of the long groove 106. The locking mechanism 7 includes an electric push rod 701 and an L-shaped clamp 1 702 installed in the sliding groove 107. The fixed plug rod 6 is provided with an L-shaped clamp 2 601 that cooperates with the L-shaped clamp 1 702. The pipe segment body 1 is provided with a torsion spring that drives the fixed plug rod 6 to rotate outward, and the surface of the fixed plug rod 6 is provided with barbs. The inner wall of the annular capsule 4 is provided with an easy tear line 401. The pipe segment body 1 is provided with a wing plate 8 to prevent rotation. The wing plate 8 is located in the middle of the pipe segment body 1, and a plurality of wing plates 8 are evenly distributed around the pipe segment body 1. The thickness of the wing plate 8 gradually increases from the front to the back. The present invention also provides a construction method, which includes the following steps:

[0056] S1. Construction preparation: determine the scope of the construction area, conduct geological survey and design, determine the starting and ending points of the pipe jacking, as well as the path and depth of the pipe jacking, and ensure the alert of the construction area and clear obstacles in the construction area;

[0057] S2. Foundation pit construction: Use excavation equipment to dig the foundation pit according to the diameter and depth determined by the design requirements. During excavation, pay attention to avoid conflicts with underground pipelines and other obstacles;

[0058] S3. Installation of pipe jacking machine: first, cast the back wall in the foundation pit, and install the reaction steel plate vertically on the ground in front of the back wall; then lay the guide rail parallel to the bottom of the pipe jacking path in the foundation pit to define the direction of pipe jacking; then install the pipe jacking machine in the foundation pit, with the rear side of the pipe jacking machine against the reaction steel plate, and the front side of the pipe jacking machine is installed with a jacking iron for jacking; finally, use a crane to lift the tunnel boring machine onto the guide rail in the foundation pit, and the pipe jacking machine pushes the head of the tunnel boring machine into the excavation hole,

[0059] S4. Pipe jacking construction: Use a crane to lift the pipe section used for composite stratum pipe jacking construction onto the guide rail in the foundation pit. The tunnel boring machine and the pipe jacking machine work simultaneously. The tunnel boring machine excavates the soil in front, and the pipe jacking machine pushes the pipe section used for composite stratum pipe jacking construction to move forward along with the tunnel boring machine.

[0060] S5. Repeat the pipe jacking construction steps until all pipe sections for the composite formation pipe jacking construction are installed in place.

[0061] Furthermore, in the present invention, the jacking speed of the pipe jacking machine in the above-mentioned pipe jacking construction step is not more than 6 meters per hour, and mud is injected in the pipe jacking construction step to lubricate the outer wall of the pipe segment used for the composite formation pipe jacking construction.

[0062] In summary, the present invention provides a pipe joint and a construction method for composite formation top pipe construction, which have the beneficial effects of good sealing effect and long sealing life.

[0063] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe joint for composite stratum jacking construction, characterized in that: The invention comprises a pipe segment body (1), wherein the inner wall of the rear end of the pipe segment body (1) is provided with an annular wave surface 1 (101), and the front end of the pipe segment body (1) is provided with an annular wave surface 2 (102). After the two pipe segment bodies (1) are connected, an annular wave gap (2) is provided between the annular wave surface 1 (101) and the annular wave surface 2 (102) at the connection point. The front end surface of the pipe segment body (1) is provided with a receiving chamber (3) which is connected with the annular wave gap (2). The chamber (3) is provided with an annular capsule (4), and the annular capsule (4) is filled with a sealant (5). The rear end of the pipe segment body (1) is provided with an insert (103) adapted to the accommodating chamber (3). When the insert (103) is inserted, the outer wall of the insert (103) abuts against the outer wall of the accommodating chamber (3). After the insert (103) is inserted, the annular capsule (4) is squeezed and broken by the insert (103), and the sealant (5) is released to fill the annular wave gap (2). The outer wall of the pipe segment body (1) is provided with a long groove (106) parallel to the center line, a fixed plug rod (6) is arranged in the long groove (106), the head of the fixed plug rod (6) faces the forward direction of the pipe segment body (1), the tail of the fixed plug rod (6) is hinged to the pipe segment body (1), and the pipe segment body (1) is provided with a locking mechanism (7) connected to the fixed plug rod (6). The bottom of the long groove (106) is provided with a slide groove (107), the locking mechanism (7) comprises an electric push rod (701) and an L-shaped clamping member (702) installed in the slide groove (107), and the fixed plug rod (6) is provided with an L-shaped clamping member (601) matched with the L-shaped clamping member (702). The pipe segment body (1) is provided with a torsion spring for driving the fixed insertion rod (6) to rotate outward, and the surface of the fixed insertion rod (6) is provided with barbs.

2. The pipe segment for composite stratum jacking construction according to claim 1 is characterized in that: The rear end of the pipe joint body (1) is provided with a shoulder (104), and the front end of the pipe joint body (1) is provided with an abutting end surface (105) which abuts against the shoulder (104) after being inserted.

3. The pipe segment for composite stratum jacking construction according to claim 1 is characterized in that: The inner side wall of the annular capsule (4) is provided with a tear line (401).

4. The pipe segment for composite stratum jacking construction according to claim 1 is characterized in that: The pipe segment body (1) is provided with a wing plate (8) for preventing rotation. The wing plate (8) is located in the middle of the pipe segment body (1), and a plurality of the wing plates (8) are evenly distributed around the pipe segment body (1).

5. The pipe segment for composite stratum jacking construction according to claim 4 is characterized in that: The thickness of the wing plate (8) gradually increases from front to back.

6. A construction method of a pipe segment for composite stratum jacking construction using the pipe segment of claim 1, characterized in that: The following steps are included: S1. Construction preparation: determine the scope of the construction area, conduct geological survey and design, determine the starting and ending points of the pipe jacking, as well as the path and depth of the pipe jacking, and ensure the alert of the construction area and clear obstacles in the construction area; S2. Foundation pit construction: Use excavation equipment to dig the foundation pit according to the diameter and depth determined by the design requirements. During excavation, pay attention to avoid conflicts with underground pipelines and other obstacles; S3. Installation of pipe jacking machine: first, cast the back wall in the foundation pit, and install the reaction steel plate vertically on the ground in front of the back wall; then lay the guide rail parallel to the bottom of the pipe jacking path in the foundation pit to define the direction of pipe jacking; then install the pipe jacking machine in the foundation pit, with the rear side of the pipe jacking machine against the reaction steel plate, and the front side of the pipe jacking machine is installed with a jacking iron for jacking; finally, use a crane to lift the tunnel boring machine onto the guide rail in the foundation pit, and the pipe jacking machine pushes the head of the tunnel boring machine into the excavation hole, S4, pipe jacking construction: using a crane to lift the pipe section for composite stratum pipe jacking construction according to claim 1 onto the guide rail in the foundation pit, the tunnel boring machine and the pipe jacking machine work simultaneously, the tunnel boring machine excavates the soil in front, and the pipe jacking machine pushes the pipe section for composite stratum pipe jacking construction to follow the tunnel boring machine forward; S5. Repeat step S4 until all pipe sections for composite formation pipe jacking construction are installed in place.

7. The construction method according to claim 6, characterized in that: The jacking speed of the jacking machine in the jacking construction step is no more than 6 meters per hour, and mud is injected into the jacking construction step to lubricate the outer wall of the pipe segment used for the composite formation jacking construction.

Images