Pipe segment for pipe jacking construction in mixed ground and construction method

Abstract

A pipe segment for pipe jacking construction in mixed ground, relating to the technical field of pipe jacking construction. The pipe segment comprises a pipe segment body (1); a first annular wavy surface (101) is provided on the inner wall of the rear end of the pipe segment body; a second annular wavy surface (102) is provided on the inner wall of the front end of the pipe segment body; a receiving chamber (3) connected to an annular wavy gap (2) is provided on the end face of the front end of the pipe segment body; the receiving chamber is provided with an annular bag (4); the inside of the annular bag is filled with a sealant (5); the rear end of the pipe segment body is provided with an insert (103) adapted to the receiving chamber; upon insertion of the insert, the outer side wall of the insert abuts against the outer side wall of the receiving chamber; after insertion of the insert, the annular bag ruptured by the insert releases the sealant to fill the annular wavy gap. In addition, further disclosed is a construction method, comprising the steps of construction preparation, foundation pit construction, pipe jacking machine installation and pipe jacking construction. The pipe segment for pipe jacking construction in mixed ground and the construction method have the beneficial effects of good sealing effects and long sealing lives.

Description

A pipe section and construction method for pipe jacking construction in composite formations Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, specifically to a pipe section and construction method for pipe jacking construction in composite strata. Background Technology

[0002] Pipe jacking is a pipeline installation technology that involves little or no excavation. Within a working pit, the jacking equipment uses its jacking force to overcome the friction between the pipe and the surrounding soil, pushing the pipe into the ground at a designed slope. The excavated soil is then removed. After one pipe section is pushed into the soil, the next section is installed and the process continues. Pipe jacking technology is widely used for laying, replacing, and repairing various pipelines across highways, railways, rivers, and busy urban areas where excavation is not permitted or feasible. Due to its advantages such as low overall cost, short construction period, minimal environmental impact, and high construction safety, pipe jacking is widely used in the construction of underground pipelines for municipal water supply and drainage, communication cables, gas pipelines, and power cables.

[0003] In existing pipe jacking construction, for complex geological formations, sealing is required between two pipe sections to prevent water seepage. The most common sealing method is to use rubber rings pre-adhered to adjacent pipe sections. The leading end of subsequent pipe sections compresses the rubber rings during jacking to achieve a seal. However, the rubber rings can easily cause misalignment between the two pipe sections during jacking, making it difficult to guarantee a proper seal. Furthermore, the complex underground environment leads to the rubber rings aging and failing after prolonged use, making it difficult to maintain a consistent seal over time.

[0004] Therefore, existing technologies need to be improved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the rubber ring has poor sealing effect and short sealing life in the prior art. The purpose is to provide a pipe section and construction method for composite stratum pipe jacking construction, which adopts corresponding technical means and has the beneficial effects of good sealing effect and long sealing life.

[0006] This invention is achieved through the following technical solution:

[0007] A pipe section for composite stratum pipe jacking construction includes a pipe section body. The inner wall of the rear end of the pipe section body has a first annular corrugated surface, and the front end of the pipe section body has a second annular corrugated surface. After two pipe sections are connected, an annular corrugated gap is provided between the first and second annular corrugated surfaces at the connection point. The front end face of the pipe section body has a receiving chamber communicating with the annular corrugated gap. The receiving chamber contains an annular capsule filled with sealant. The rear end of the pipe section body has an insert adapted to the receiving chamber. When the insert is inserted, its outer wall abuts against the outer wall of the receiving chamber. After insertion, the annular capsule, ruptured by the insert, releases the sealant to fill the annular corrugated gap.

[0008] Furthermore, in this invention, the rear end of the aforementioned tube segment body is provided with a shoulder, and the front end of the tube segment body is provided with an abutting end face that abuts against the shoulder after insertion.

[0009] Furthermore, in this invention, the outer wall of the aforementioned pipe section body is provided with an elongated groove parallel to the center line, and a fixing rod is provided in the elongated groove. The head of the fixing rod faces the forward direction of the pipe section body, and the tail of the fixing rod is hinged to the pipe section body. The pipe section body is provided with a locking mechanism for connecting the fixing rod.

[0010] Furthermore, in this invention, the bottom of the elongated groove is provided with a sliding groove, and the locking mechanism includes an electric push rod and an L-shaped clip 1 installed in the sliding groove, and the fixing rod is provided with an L-shaped clip 2 that cooperates with the L-shaped clip 1.

[0011] Furthermore, in this invention, the main body of the tube segment is provided with a torsion spring that drives the fixed insertion rod to rotate outward, and the surface of the fixed insertion rod is provided with barbs.

[0012] Furthermore, in this invention, the inner wall of the aforementioned annular capsule is provided with an easy-tear line.

[0013] Furthermore, in this invention, the main body of the pipe section is provided with a wing plate to prevent rotation. The wing plate is located in the middle of the main body of the pipe section, and a plurality of the wing plates are evenly distributed around the main body of the pipe section.

[0014] Furthermore, in this invention, the thickness of the aforementioned wing plate gradually increases from front to back.

[0015] Secondly, the present invention also provides a construction method for the pipe section used in the above-mentioned composite stratum pipe jacking construction, which includes the following steps:

[0016] S1. 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 prepare for the construction area by setting up a perimeter and clearing obstacles from the construction area.

[0017] S2. Excavation of foundation pit: Excavate the foundation pit according to the diameter and depth determined by the design requirements using excavation equipment. During excavation, care should be taken to avoid conflict with underground pipelines and other obstacles.

[0018] S3. Pipe jacking machine installation: First, pour a back wall in the foundation pit and install a reaction steel plate perpendicular to the ground in front of the back wall; then, lay guide rails parallel to the pipe jacking path in the foundation pit to define the direction of pipe jacking; next, install the pipe jacking machine in the foundation pit, with the rear of the pipe jacking machine abutting against the reaction steel plate, and the front of the pipe jacking machine equipped with jacking irons for jacking; finally, use a crane to lift the tunneling machine onto the guide rails in the foundation pit, and the pipe jacking machine pushes the head of the tunneling machine into the excavation opening.

[0019] S4. Pipe jacking construction: The pipe section used for composite stratum pipe jacking construction is lifted by a crane onto the guide rail in the foundation pit. The tunneling machine and the pipe jacking machine work at the same time. The tunneling machine excavates the soil in front, and the pipe jacking machine pushes the pipe section used for composite stratum pipe jacking construction forward with the tunneling machine.

[0020] S5. Repeat step S4 until all pipe sections used for composite stratum pipe jacking construction are installed in place.

[0021] Furthermore, in this invention, the jacking speed of the pipe jacking machine in the above-mentioned pipe jacking construction step is no more than 6 meters per hour, and mud is injected to lubricate the outer wall of the pipe section used for pipe jacking construction in composite strata during the pipe jacking construction step.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] This invention provides a pipe section for composite strata pipe jacking construction. An annular capsule filled with sealant is installed inside a receiving chamber at the front end of the main pipe section. During jacking, the front end of the subsequent pipe section contacts the rear end of the preceding pipe section. An insert from the preceding pipe section is inserted into the receiving chamber of the subsequent pipe section, rupturing the annular capsule and releasing the sealant. Because the outer wall of the insert abuts against the outer wall of the receiving chamber, the sealant only flows into the annular corrugated gap between the first and second annular corrugated surfaces, sealing the gap after drying. The sealant does not use a rubber ring, preventing misalignment during jacking and ensuring a good 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, resulting in a longer service life.

[0024] The present invention also provides a construction method, including construction preparation, foundation pit construction, pipe jacking machine installation, pipe jacking construction and other steps, and also uses pipe sections for composite strata pipe jacking construction, which can achieve a good sealing effect for a longer period of time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0026] Figure 1 is an internal schematic diagram of the pipe section used for composite stratum pipe jacking construction of the present invention (fixed insertion rod not unfolded).

[0027] Figure 2 is an internal schematic diagram of the pipe section used for composite stratum pipe jacking construction of the present invention (the fixing rod has been deployed).

[0028] Figure 3 is an enlarged schematic diagram of point A in Figure 1;

[0029] Figure 4 is a schematic diagram of the insert of the present invention before insertion;

[0030] Figure 5 is a schematic diagram of the insert of the present invention after insertion;

[0031] Figure 6 is a schematic diagram of the annular capsule of the present invention.

[0032] The attached diagram shows the markings and corresponding component names: 1-pipe section body, 101-annular wave surface one, 102-annular wave surface two, 103-insertion piece, 104-shoulder, 105-abutting end face, 106-long groove, 107-slide groove, 2-annular wave gap, 3-accommodating chamber, 4-annular capsule, 401-easy tear line, 5-sealant, 6-fixing rod, 601-L-shaped clip two, 7-locking mechanism, 701-electric push rod, 702-L-shaped clip one, 8-wing plate. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for explanation only and are not intended to limit the invention. The following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0034] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, 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, "a plurality of" means at least two. It should also be noted in the description of the embodiments of the present invention that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0035] Example 1

[0036] Referring to Figures 1 to 6, a pipe section for composite stratum pipe jacking construction according to Embodiment 1 of the present invention is described in detail below.

[0037] Please refer to Figure 1. The pipe section used for composite stratum pipe jacking construction in this embodiment 1 is mainly composed of a cylindrical pipe section body 1. The pipe section body 1 is generally made of concrete. In order to increase the structural strength of the pipe section body 1, a steel mesh can be added to the template before pouring.

[0038] Furthermore, as shown in Figure 1, the pipe sections used in the composite stratum pipe jacking construction are jacked from right to left, that is, the left end of the main body 1 of the pipe section is the front end, and the right end of the main body 1 of the pipe section is the rear end. An annular receiving chamber 3 is provided on the front end face of the main body 1 of the pipe section, and the cross-section of the receiving chamber 3 is approximately a U-shaped groove.

[0039] Referring to Figures 1 and 4, the inner side of the receiving chamber 3 protrudes forward by a section compared to the outer side of the receiving chamber 3, and a transverse annular corrugated surface 102 is provided on the inner side of the receiving chamber 3 (the side closer to the center line of the tube section body 1). Correspondingly, an annular insert 103 is fixedly installed on the right end face of the tube section body 1. The cross-section of the insert 103 is approximately convex, and the insert 103 can be inserted into the receiving chamber 3 after the two tube sections 1 are aligned. The inner wall of the insert 103 (the side wall closer to the center line of the tube section body 1) is provided with a transverse annular corrugated surface 101.

[0040] Furthermore, as shown in Figures 4 and 5, an annular capsule 4 is installed inside the receiving chamber 3. The annular capsule 4 is made of plastic and is filled with sealant 5. Before the main body of the pipe section 1 is hoisted onto the guide rail, the annular capsule 4 is pre-installed in the receiving chamber 3 and the annular capsule 4 and the main body of the pipe section 1 are bonded and fixed with adhesive.

[0041] As shown in Figures 4 and 5, after the two pipe sections 1 are aligned, the jacking machine pushes the rear pipe section 1 closer to the front pipe section 1. During this approach, the insert 103 is inserted into the receiving chamber 3, breaking the annular capsule 4 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 receiving chamber 3, the outer wall of the insert 103 abuts against the outer wall of the receiving chamber 3 when it is inserted, preventing the sealant 5 from overflowing after release. As shown in Figure 5, after the insert 103 is inserted, an annular corrugated surface 101 and annular corrugated surface 102 form an annular corrugated gap 2. The annular corrugated gap 2 is connected to the inner side of the receiving chamber 3. The released sealant 5 is automatically squeezed into the annular corrugated gap 2. After the sealant 5 dries, it acts as a seal, preventing water leakage at the connection between the two pipe sections 1.

[0042] It should be noted that, as shown in Figure 6, an easy-tear line 401 is machined on the inner wall of the annular capsule 4. The easy-tear line 401 is a common design in plastic products, making it easier for the capsule to break and facilitating the extrusion of the sealant 5. The annular capsule 4 has a filling nozzle. After the annular capsule 4 is fitted into the receiving chamber 3, the sealant 5 is injected into the annular capsule 4 through the filling nozzle using a pump. Finally, the filling nozzle is plugged or tightened to seal the capsule. The sealant 5 can be a waterproof adhesive from existing technologies, such as AB glue or potting compound.

[0043] Referring to Figures 4 and 5, a shoulder 104 in the form of a shaft shoulder is provided at the rear end of the pipe section body 1, and an abutment end face 105 is provided at the front end of the pipe section body 1. The abutment end face 105 is located on the inner side wall end face of the receiving chamber 3. When the two pipe section bodies 1 are connected, the abutment end face 105 and the shoulder 104 abut against each other, reducing the impact of fluid (such as sewage) inside the pipe section body 1 on the sealant 5 and extending the service life of the sealant 5.

[0044] In some embodiments of this example, as shown in Figure 1, four wing plates 8 are installed on the outer wall of a pipe section body 1. The wing plates 8 can prevent the pipe section body 1 from rotating during the jacking process. The wing plates 8 are located in the middle of the pipe section body 1, and the four wing plates 8 are evenly distributed around the pipe section body 1. The front side of the wing plate 8 is thinner, which facilitates breaking through the soil during jacking and reduces the impact of the wing plate 8 on the excavation. The thickness of the wing plate 8 gradually increases from front to back, and the increased thickness prevents the wing plate 8 from being too rigid and easily deformed.

[0045] In some embodiments of this example, as shown in Figures 1 and 2, multiple fixing rods 6 are evenly installed on the side wall of the pipe section body 1 to fix the installed pipe section body 1. An elongated groove 106 is formed on the outer wall of the pipe section body 1. A hinged support is fixedly installed on the right side of the groove 106, and the hinged support is fixedly connected to the right end of the fixing rod 6. The fixing rod 6 can rotate around the hinged support. A torsion spring is installed on the hinged support, passing through the shaft of the fixing rod 6. The torsion spring is also connected to the fixing rod 6 and has a tendency to drive the fixing rod 6 to unfold.

[0046] Referring to Figures 1, 2, and 3, the front end of the fixing rod 6 is a pointed tip. An L-shaped clip 601 with an L-shaped side is fixedly installed on the side of the fixing rod 6 near the center of the pipe section body 1. A sliding groove 107 is formed at the bottom of the elongated groove 106. The locking mechanism 7 consists of two parts: an electric push rod 701 and an L-shaped clip 702. Both the electric push rod 701 and the L-shaped clip 702 are installed in the sliding groove 107. The electric push rod 701 and the L-shaped clip 702 are connected. The L-shaped clip 702 is an inverted L-shape. After the L-shaped clip 702 moves to the left, it and the L-shaped clip 601 interlock, preventing the fixing rod 6 from unfolding. The fixing rod 6 serves to fix the pipe section body 1.

[0047] It should be noted that when the main body of the pipe section 1 is only a short distance away from completing the installation, the control electric push rod 701 drives the L-shaped clamp 702 to retract, separating L-shaped clamp 702 and L-shaped clamp 601. The fixing rod 6, under the action of the torsion spring, tends to unfold outwards. As the main body of the pipe section 1 continues to advance, the fixing rod 6 is continuously unfolded. When the main body of the pipe section 1 is fully installed, the fixing rod 6 unfolds as shown in Figure 2. The surface of the fixing rod 6 is equipped with barbs to enhance its fixing effect.

[0048] Example 2

[0049] This embodiment provides a construction method using pipe sections for composite strata pipe jacking construction as described in Embodiment 1. It includes four parts: construction preparation, foundation pit construction, pipe jacking machine installation, and pipe jacking construction.

[0050] During construction preparation, the scope of the construction area is determined, and geological surveys and designs are carried out to determine the starting and ending points of the pipe jacking, as well as the path and depth of the pipe jacking. The construction area is also secured and obstacles are cleared.

[0051] During the construction of the foundation pit, excavation equipment is used to excavate the foundation pit according to the diameter and depth determined by the design requirements. During excavation, care should be taken to avoid conflict with underground pipelines and other obstacles.

[0052] During the installation of the pipe jacking machine, a back wall is first poured in the foundation pit, and a reaction steel plate is installed vertically to the ground in front of the back wall. Then, guide rails are laid parallel below the pipe jacking path in the foundation pit to define the direction of pipe jacking. Next, the pipe jacking machine is installed in the foundation pit, with its rear side abutting against the reaction steel plate and a jacking iron installed at its front side for jacking. Finally, a crane is used to lift the tunneling machine onto the guide rails in the foundation pit, and the pipe jacking machine pushes the tunneling machine's head into the excavation opening.

[0053] During pipe jacking construction, a crane is used to lift the pipe sections used for composite strata 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 strata pipe jacking construction forward with the tunneling machine.

[0054] Repeat the pipe jacking construction steps until all pipe sections used for composite strata pipe jacking construction are installed in place.

[0055] During the pipe jacking construction process, the jacking speed of the pipe jacking machine is 5 meters per hour or 6 meters per hour. During the pipe jacking construction process, mud is injected to lubricate the outer wall of the pipe section used for pipe jacking in composite strata, making jacking easier.

[0056] The working principle of the pipe section and construction method for composite stratum pipe jacking construction of the present invention is as follows:

[0057] During the jacking process, the front end of the subsequent pipe section 1 contacts the rear end of the preceding pipe section 1. The insert 103 of the preceding pipe section 1 is inserted into the receiving chamber 3 of the subsequent pipe section 1, rupturing the annular capsule 4 and releasing the sealant 5. Because the outer wall of the insert 103 abuts against the outer wall of the receiving chamber 3, the sealant 5 only flows into the annular corrugated gap 2 between the first annular corrugated surface 101 and the second annular corrugated surface 102. After the sealant 5 dries, it seals the annular corrugated gap 2. Since no rubber ring is used for sealing, misalignment of the rubber ring will not occur during the jacking process, ensuring a good sealing effect. Because the outer wall of the insert 103 abuts against the outer wall of the receiving chamber 3, the sealant 5 is less affected by the external environment, resulting in a longer service life.

[0058] In summary, the present invention provides a pipe section for composite stratum pipe jacking construction, comprising a pipe section body 1, an annular corrugated surface 101 on the inner wall of the rear end of the pipe section body 1, an annular corrugated surface 102 on the front end of the pipe section body 1, an annular corrugated gap 2 between the annular corrugated surface 101 and the annular corrugated surface 102 at the connection point of the two pipe section bodies 1 after connection, an annular corrugated gap 2 is provided between the annular corrugated surface 101 and the annular corrugated surface 102 at the front end face of the pipe section body 1, a receiving chamber 3 communicating with the annular corrugated gap 2 is provided in the receiving chamber 3, an annular capsule 4 is provided in the receiving chamber 3, the annular capsule 4 is filled with sealant 5, and an insert 103 adapted to the receiving chamber 3 is provided at the rear end of the pipe section body 1. When the insert 103 is inserted, the outer wall of the insert 103 abuts against the outer wall of the receiving chamber 3. After the insert 103 is inserted, the annular capsule 4 ruptured by the insert 103 releases the sealant 5 to fill the annular corrugated gap 2. The rear end of the tube section body 1 is provided with a shoulder 104, and the front end of the tube section body 1 is provided with an abutment end face 105 that abuts against the shoulder 104 after insertion. The outer wall of the tube section body 1 is provided with an elongated groove 106 parallel to the center line. A fixing rod 6 is provided in the elongated groove 106. The head of the fixing rod 6 faces the forward direction of the tube section body 1, and the tail of the fixing rod 6 is hinged to the tube section body 1. The tube section body 1 is provided with a locking mechanism 7 for connecting the fixing rod 6. A sliding groove 107 is provided at the bottom of the elongated groove 106. The locking mechanism 7 includes an electric push rod 701 and an L-shaped clip 702 installed in the sliding groove 107. The fixing rod 6 is provided with an L-shaped clip 601 that cooperates with the L-shaped clip 702. The tube section body 1 is provided with a torsion spring that drives the fixing rod 6 to rotate outward. The surface of the fixing rod 6 is provided with barbs. The inner wall of the annular capsule 4 is provided with an easy-tear line 401. The pipe section body 1 is provided with anti-rotation wing plates 8, which are located in the middle of the pipe section body 1, and several wing plates 8 are evenly distributed around the pipe section body 1. The thickness of the wing plates 8 gradually increases from front to back. The present invention also provides a construction method, which includes the following steps:

[0059] S1. 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 prepare for the construction area by setting up a perimeter and clearing obstacles from the construction area.

[0060] S2. Excavation of foundation pit: Excavate the foundation pit according to the diameter and depth determined by the design requirements using excavation equipment. During excavation, care should be taken to avoid conflict with underground pipelines and other obstacles.

[0061] S3. Pipe jacking machine installation: First, pour a back wall in the foundation pit and install a reaction steel plate perpendicular to the ground in front of the back wall; then, lay guide rails parallel to the pipe jacking path in the foundation pit to define the direction of pipe jacking; next, install the pipe jacking machine in the foundation pit, with the rear of the pipe jacking machine abutting against the reaction steel plate, and the front of the pipe jacking machine equipped with jacking irons for jacking; finally, use a crane to lift the tunneling machine onto the guide rails in the foundation pit, and the pipe jacking machine pushes the head of the tunneling machine into the excavation opening.

[0062] S4. Pipe jacking construction: The pipe section used for composite stratum pipe jacking construction is lifted by a crane onto the guide rail in the foundation pit. The tunneling machine and the pipe jacking machine work at the same time. The tunneling machine excavates the soil in front, and the pipe jacking machine pushes the pipe section used for composite stratum pipe jacking construction forward with the tunneling machine.

[0063] S5. Repeat the pipe jacking construction steps until all pipe sections used for composite strata pipe jacking construction are installed in place.

[0064] Furthermore, in this invention, the jacking speed of the pipe jacking machine in the above-mentioned pipe jacking construction step is no more than 6 meters per hour, and mud is injected to lubricate the outer wall of the pipe section used for pipe jacking construction in composite strata during the pipe jacking construction step.

[0065] In summary, the present invention provides a pipe section and construction method for composite stratum pipe jacking construction, which have the beneficial effects of good sealing effect and long sealing life.

[0066] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment 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 within the scope of protection of the present invention.

Claims

1. A pipe section for composite stratum pipe jacking construction, characterized in that, The system includes a pipe section body (1), with an annular wave surface one (101) on the inner wall of the rear end of the pipe section body (1) and an annular wave surface two (102) on the front end of the pipe section body (1). After the two pipe sections (1) are connected, an annular wave gap (2) is provided between the annular wave surface one (101) and the annular wave surface two (102) at the connection point. The front end face of the pipe section body (1) has a receiving chamber (3) communicating with the annular wave gap (2). The chamber (3) is provided with an annular capsule (4), which is filled with sealant (5). The rear end of the tube section body (1) is provided with an insert (103) that is adapted to the receiving chamber (3). When the insert (103) is inserted, the outer wall of the insert (103) abuts against the outer wall of the receiving chamber (3). After the insert (103) is inserted, the annular capsule (4) that is squeezed by the insert (103) releases the sealant (5) to fill the annular wave gap (2).

2. The pipe section for composite stratum pipe jacking construction according to claim 1, characterized in that, The rear end of the tube body (1) is provided with a shoulder (104), and the front end of the tube body (1) is provided with an abutting end face (105) that abuts against the shoulder (104) after insertion.

3. The pipe section for composite stratum pipe jacking construction according to claim 1, characterized in that, The outer wall of the pipe section body (1) is provided with a long groove (106) parallel to the center line. A fixed insertion rod (6) is provided in the long groove (106). The head of the fixed insertion rod (6) faces the forward direction of the pipe section body (1). The tail of the fixed insertion rod (6) is hinged to the pipe section body (1). The pipe section body (1) is provided with a locking mechanism (7) for connecting the fixed insertion rod (6).

4. The pipe section for composite stratum pipe jacking construction according to claim 3, characterized in that, The bottom of the long groove (106) is provided with a sliding groove (107). The locking mechanism (7) includes an electric push rod (701) and an L-shaped clip (702) installed in the sliding groove (107). The fixed insert rod (6) is provided with an L-shaped clip (601) that cooperates with the L-shaped clip (702).

5. The pipe section for composite stratum pipe jacking construction according to claim 4, characterized in that, The main body (1) of the tube section is provided with a torsion spring that drives the fixed insertion rod (6) to rotate outward, and the surface of the fixed insertion rod (6) is provided with barbs.

6. The pipe section for composite stratum pipe jacking construction according to claim 1, characterized in that, The inner wall of the annular capsule (4) is provided with a tear-resistant line (401).

7. The pipe section for composite stratum pipe jacking construction according to claim 1, characterized in that, The main body (1) of the pipe section is provided with a wing plate (8) to prevent rotation. The wing plate (8) is located in the middle of the main body (1), and several of the wing plates (8) are evenly distributed around the main body (1).

8. The pipe section for composite stratum pipe jacking construction according to claim 7, characterized in that, The thickness of the wing plate (8) gradually increases from front to back.

9. A construction method for a pipe section used in composite stratum pipe jacking construction as described in claim 1, characterized in that, Includes the following steps, S1. 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 prepare for the construction area by setting up a perimeter and clearing obstacles from the construction area. S2. Excavation of foundation pit: Excavate the foundation pit according to the diameter and depth determined by the design requirements using excavation equipment. During excavation, care should be taken to avoid conflict with underground pipelines and other obstacles. S3. Pipe jacking machine installation: First, pour a back wall in the foundation pit and install a reaction steel plate perpendicular to the ground in front of the back wall; then, lay guide rails parallel to the pipe jacking path in the foundation pit to define the direction of pipe jacking; next, install the pipe jacking machine in the foundation pit, with the rear of the pipe jacking machine abutting against the reaction steel plate, and the front of the pipe jacking machine equipped with jacking irons for jacking; finally, use a crane to lift the tunneling machine onto the guide rails in the foundation pit, and the pipe jacking machine pushes the head of the tunneling machine into the excavation opening. S4. Pipe jacking construction: The pipe section used for composite stratum pipe jacking construction as described in claim 1 is lifted by a crane onto the guide rail 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 section used for composite stratum pipe jacking construction forward with the tunneling machine. S5. Repeat step S4 until all pipe sections used for composite stratum pipe jacking construction are installed in place.

10. The construction method according to claim 9, characterized in that, During the pipe jacking construction process, the jacking speed of the pipe jacking machine shall not exceed 6 meters per hour. During the pipe jacking construction process, mud shall be injected to lubricate the outer wall of the pipe section used for pipe jacking construction in composite strata.

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