Pipe jacking engineering body

Abstract

The application relates to a receiving well and a pipe jacking engineering body. The receiving well has a first end wall which is obliquely intersected with a tunneling axis of a pipe jacking machine, a retaining wall is arranged in the receiving well, the retaining wall and the first end wall jointly form a box body, the retaining wall comprises a second end wall which is perpendicular to the tunneling axis, the second end wall is provided with an outlet through which the pipe jacking machine passes, and the box body is filled with soil. The receiving well can ensure that the pipe jacking machine is balanced on both sides when entering the receiving well, the pipe jacking machine is prevented from deflecting during the tunneling process, and the pipe jacking construction is ensured to be smoothly carried out.

Description

Technical Field

[0001] This application relates to the field of tunnel construction technology, and in particular to a receiving shaft and pipe jacking engineering body. Background Technology

[0002] With the development of urban construction, underground engineering projects in urban areas face complex surrounding environments. The emergence of pipe jacking technology has solved problems such as damage to urban buildings and traffic congestion during construction, demonstrating its advantages in stabilizing soil layers and protecting the environment. Pipe jacking technology is a trenchless construction technique for building underground spaces. Its principle involves using a pipe jacking machine to push pipe sections from the starting shaft through the soil layer to the receiving shaft, thus forming a through tunnel between the two shafts. Compared to shield tunneling and open-cut methods, pipe jacking technology has significant advantages such as lower overall cost and less traffic disruption, playing a crucial role in municipal engineering projects traversing areas with dense pipelines and major traffic arteries. Large-section rectangular pipe jacking is widely used in underground passages, integrated utility tunnels, and underground facility connecting passages, among other underground space development applications.

[0003] Currently, the most common pipe jacking construction cases are straight pipe jacking, where the tunneling axis of the pipe jacking machine intersects perpendicularly with the end wall of the receiving shaft. However, with the continuous development of underground engineering, the spatial relationships of urban underground spaces have gradually become more complex. Sometimes, due to external environmental constraints, shaft location adjustments, etc., it is not possible to guarantee that the tunneling axis of the pipe jacking machine is perpendicular to the receiving shaft wall during pipe jacking, resulting in a situation where the tunneling axis of the pipe jacking machine intersects obliquely with the working shaft. In this case, during the process of the pipe jacking machine entering the receiving shaft, one side of the pipe jacking machine and pipe section has already entered the receiving shaft, while the other side is still in the soil outside the receiving shaft. This leads to an imbalance of forces on both sides of the pipe jacking machine, which can easily damage the machine. Furthermore, the pipe jacking machine has poor self-correction capabilities, causing it to deviate during the tunneling process, thus leading to difficulties in pipe jacking construction. Summary of the Invention

[0004] Therefore, it is necessary to provide a receiving well and a pipe jacking structure to address the difficulties in pipe jacking construction when the tunneling axis of the pipe jacking project is obliquely intersecting with the working shaft.

[0005] The technical solution is as follows:

[0006] On one hand, this application provides a receiving well for receiving a pipe jacking machine during pipe jacking construction. The receiving well has a first end wall that intersects the tunneling axis of the pipe jacking machine at an inclination. A retaining wall is provided inside the receiving well. The retaining wall and the first end wall together enclose a box. The retaining wall includes a second end wall that is perpendicular to the tunneling axis. The second end wall has an outlet for the pipe jacking machine to pass through. The box is filled with soil.

[0007] The technical solution of this application will be further described below:

[0008] In one embodiment, the first end wall has an opening through which the pipe jacking machine passes, and the retaining wall further includes a first side wall and a second side wall respectively arranged on both sides of the opening. One end of the first side wall is connected to the first end wall, and the other end of the first side wall is connected to the second end wall. One end of the second side wall is connected to the first end wall, and the other end of the second side wall is connected to the second end wall.

[0009] In one embodiment, the first sidewall is arranged parallel to the tunneling axis; and / or, the second sidewall is arranged perpendicular to the second endwall.

[0010] In one embodiment, the soil mass comprises foamed lightweight soil.

[0011] On the other hand, this application also provides a pipe jacking project body, including a launching shaft, the aforementioned receiving shaft, and a pipe jacking channel connecting the launching shaft and the receiving shaft, wherein a plurality of pipe sections are provided in the pipe jacking channel, and the plurality of pipe sections are arranged sequentially along the pipe jacking channel.

[0012] In one embodiment, the plurality of pipe sections includes a pipe section to be cut that intersects with the first end wall. The pipe section to be cut has a cutting end face flush with the first end wall. The cutting end face is provided with a first welded component. The first end wall has an opening through which the pipe jacking machine passes. The first end wall is provided with an annular welded component surrounding the opening. The first welded component is welded to the annular welded component.

[0013] In one embodiment, the outer wall of the pipe section to be cut is further provided with a second welding member connected to the first welding member, and the second welding member is welded to the first welding member and / or the annular welding member.

[0014] In one embodiment, the first end wall is further provided with a ring beam, the ring beam being arranged around the opening and covering the first welded part and the annular welded part.

[0015] In one embodiment, the pipe section to be cut has a reinforcing rib extending from the cut end face, the reinforcing rib being anchored into the ring beam.

[0016] In one embodiment, the contact surface between the ring beam and the first welded component is provided with a first water-stop strip; and / or, the contact surface between the ring beam and the annular welded component is provided with a second water-stop strip.

[0017] The aforementioned receiving shaft and pipe jacking structure are constructed by installing retaining walls within the shaft, which, together with the first end wall, form a box-like enclosure, which is then filled with soil. Since the retaining walls include a second end wall perpendicular to the tunneling axis, the pipe jacking machine, which would normally need to jack through the first end wall when entering the receiving shaft, now jacks through a second end wall perpendicular to the tunneling axis. This ensures that when the pipe jacking machine enters the receiving shaft from the outlet of the second end wall along the tunneling axis, the working face (i.e., the tunnel face) of the pipe jacking machine remains parallel to the second end wall. This allows both sides of the pipe jacking machine to simultaneously penetrate the soil, ensuring a balance of forces on both sides of the machine, preventing deflection during tunneling, and thus guaranteeing the smooth progress of the pipe jacking construction. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the planar structure of a pipe jacking project according to an embodiment;

[0021] Figure 2 for Figure 1 A magnified view of part A shown in the image;

[0022] Figure 3 for Figure 1 A schematic diagram of the vertical cross-section of the pipe jacking project shown in the figure;

[0023] Figure 4 This is a schematic diagram of the structure of a pipe jacking channel at the opening of a tunnel, according to one embodiment.

[0024] Figure 5 This is a schematic diagram of the connection between the jacking pipe and the annular welded component in one embodiment.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Receiving shaft; 11. First end wall; 111. Opening; 12. Retaining wall; 121. Second end wall; 122. Exit; 123. First side wall; 124. Second side wall; 13. Soil; 20. Pipe jacking tunnel; 21. Excavation axis; 22. Pipe section; 221. First welded component; 222. Second welded component; 223. Shear-resistant component; 224. Reinforcing bar; 30. Launching shaft; 40. Ring beam; 50. Annular welded component; 61. First waterstop strip; 62. Second waterstop strip; 70. Grouting pipe. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] See Figures 1 to 3 One embodiment of this application provides a pipe jacking project, including a launching shaft 30, a receiving shaft 10, and a pipe jacking channel 20 connecting the launching shaft 30 and the receiving shaft 10. The launching shaft 30 is the location for installing all jacking equipment during pipe jacking construction and is also the starting point for the pipe jacking machine. The receiving shaft 10 is the location for receiving the pipe jacking machine. The pipe jacking machine forms the pipe jacking channel 20 by jacking pipe sections 22 from the launching shaft 30 through the soil layer to the receiving shaft 10. Furthermore, the pipe jacking channel 20 contains multiple pipe sections 22, which are arranged sequentially along the pipe jacking channel 20 to support it and prevent collapse.

[0029] As mentioned earlier, under normal circumstances, the tunneling axis 21 of the pipe jacking machine, i.e., the axis of the pipe jacking channel 20 to be excavated, intersects perpendicularly with the end wall of the receiving shaft 10. However, with the continuous development of underground engineering, the relationship between urban underground spaces has gradually become more complex. Sometimes, due to external environmental constraints, it is necessary to adjust the position of the receiving shaft 10 or the pipe jacking channel 20. This can result in the tunneling axis 21 of the pipe jacking machine, i.e., the axis of the pipe jacking channel 20, intersecting the receiving shaft 10 at an angle. This will cause the working face (i.e., the tunnel face) of the pipe jacking machine to be non-parallel to the end face of the receiving shaft 10. During the process of the pipe jacking machine entering the receiving shaft 10, one side of the pipe jacking machine has entered the receiving shaft 10, while the other side is still in the soil 13 outside the receiving shaft 10. This leads to an imbalance of forces on both sides of the pipe jacking machine, which can easily damage the machine. Furthermore, the pipe jacking machine has poor self-correction capabilities, and deviations during the tunneling process can lead to difficulties in pipe jacking construction.

[0030] Based on this, in one embodiment, this application also provides a receiving well 10, specifically, see [link to relevant documentation]. Figures 1 to 3 In one embodiment, the receiving shaft 10 has a first end wall 11 that intersects the tunneling axis 21 of the pipe jacking machine at an inclination. The receiving shaft 10 is provided with a retaining wall 12, which together with the first end wall 11 forms a box. The retaining wall 12 includes a second end wall 121 that is perpendicular to the tunneling axis 21. The second end wall 121 is provided with an outlet 122 for the pipe jacking machine to pass through. The box is filled with soil 13.

[0031] The aforementioned receiving shaft 10 is constructed by installing a retaining wall 12 inside the shaft, which together with the first end wall 11 forms a box-like structure, which is then filled with soil 13. Since the retaining wall 12 includes a second end wall 121 perpendicular to the tunneling axis 21, the pipe jacking machine, which originally needed to jack through the first end wall 11 when entering the receiving shaft 10, can instead jack through the second end wall 121 perpendicular to the tunneling axis 21. Consequently, when the pipe jacking machine enters the receiving shaft 10 along the tunneling axis 21 from the outlet 122 of the second end wall 121, it ensures that the working face (i.e., the tunnel face) of the pipe jacking machine remains parallel to the second end wall 121. This ensures that both sides of the pipe jacking machine can simultaneously penetrate the soil 13, thereby ensuring the balance of forces on both sides of the pipe jacking machine, preventing the pipe jacking machine from deflecting during the tunneling process, and thus ensuring the smooth progress of the pipe jacking construction.

[0032] Further, see Figure 2 The first end wall 11 has an opening 111 through which the pipe jacking machine passes. The retaining wall 12 also includes a first side wall 123 and a second side wall 124 respectively arranged on both sides of the opening 111. One end of the first side wall 123 is connected to the first end wall 11, and the other end of the first side wall 123 is connected to the second end wall 121. One end of the second side wall 124 is connected to the first end wall 11, and the other end of the second side wall 124 is connected to the second end wall 121. Specifically, the first end wall 11, the second end wall 121, the first side wall 123, and the second side wall 124 together enclose a trapezoidal box structure. It is worth noting that in other embodiments, the second side wall 124 can be omitted, so that the first end wall 11, the second end wall 121, and the first side wall 123 enclose a triangular box structure.

[0033] Furthermore, the first sidewall 123 is arranged parallel to the tunneling axis 21 to avoid collision with the first sidewall 123 during the tunneling process of the pipe jacking machine. Furthermore, the second sidewall 124 is arranged perpendicular to the second endwall 121. Understandably, in other embodiments, the second sidewall 124 may also be arranged parallel to the tunneling axis 21.

[0034] Specifically, in this embodiment, the volume of the box is greater than or equal to the volume of the pipe jacking machine entering the receiving well 10 when both sides of the pipe jacking machine penetrate the first end wall 11, thereby ensuring that when the pipe jacking machine enters the receiving well 10, both sides of the pipe jacking machine can simultaneously penetrate the soil 13.

[0035] Furthermore, after the pipe jacking machine passes through the outlet 122 and enters the receiving well 10, the retaining wall 12 can be removed and the soil 13 inside the box can be excavated. Optionally, in this embodiment, the soil 13 includes foamed lightweight soil. Foamed cement lightweight soil is a new type of lightweight material containing a large number of closed pores, formed by mechanically foaming a foaming agent using the foaming system of a foaming machine, uniformly mixing the foam with cement slurry, and then using the pumping system of the foaming machine for on-site construction or mold forming, followed by natural curing. It is suitable for on-site casting and backfilling. It also facilitates the removal of the box and the soil 13 inside the box after the pipe jacking channel 20 is completed. Optionally, in this embodiment, the retaining wall 12 is a reinforced concrete wall.

[0036] Further, see also Figure 2 When the tunneling axis 21 of the pipe jacking machine intersects the working shaft at an incline, the pipe section 22 at the intersection of the pipe jacking channel 20 and the end wall of the receiving shaft 10 needs to be cut. After cutting, the structure of the pipe section 22 will change from the original closed frame structure to a semi-open "C"-shaped structure. How to ensure the structural safety and waterproofing of the pipe section 22 during the cutting process and subsequent use is also a problem that needs to be solved.

[0037] Based on this, the reference combination Figure 4 as well as Figure 5 Among the multiple pipe sections within the pipe jacking channel 20 of this application, there is a pipe section 22 that intersects with the first end wall 11 and needs to be cut. This pipe section 22 is the section that needs to be cut after the pipe jacking machine completes the jacking process. Further, the pipe section 22, after cutting, has a cutting end face flush with the first end wall 11. The cutting end face is provided with a first weldment 221, and the first end wall 11 is provided with an annular weldment 50 surrounding the opening 111. The first weldment 221 and the annular weldment 50 are welded together. The cut pipe section 22 is welded to the annular weldment 50 via the first weldment 221. This connection strengthens the structural strength of the cut pipe section 22 and seals the gap between the pipe section 22 and the annular weldment 50, thereby improving the waterproof performance of the cut pipe section 22. Preferably, both the first weldment 221 and the annular weldment 50 are made of steel.

[0038] Furthermore, such as Figure 2 As shown, before the production of pipe section 22, the number of pipe sections 22 to be cut and the cutting range can be determined by considering the positional relationship between the jacking pipe and the receiving well 10 after the pipe is driven into the receiving well 10. Figure 2 As shown in the figure, in this embodiment, the pipe section 22 to be cut is four sections, and the cutting range is as follows. Figure 2As shown by the shading in the middle, the pipe section 22 to be cut is then divided, with the shaded area representing the part to be cut and the rest representing the remaining part. The intersection of the cut part and the remaining part is the cutting position. Finally, the reinforcement of these rings of pipe sections 22 to be cut is calculated, and the corresponding first welded parts 221 and shear-resistant members 223 connecting the cut part and the remaining part are reserved at the cutting position of the pipe section 22, thus forming the aforementioned pipe section 22 to be cut. After the pipe section 22 to be cut is pushed in, it is then cut. After cutting, the pipe section 22 to be cut will have a cut end face with the first welded parts 221 and shear-resistant members 223. The first welded parts 221 are then welded to the ring welded parts 50, ensuring the structural safety of the pipe section 22 after cutting while reducing costs and shortening the construction period.

[0039] Furthermore, the outer wall of the pipe section 22 to be cut is also provided with a second welding member 222 connected to the first welding member 221. The second welding member 222 is welded to the first welding member 221 and / or the annular welding member 50, which can further strengthen the connection effect between the pipe section 22 to be cut and the annular welding member 50, and further improve the structural safety of the pipe section 22 after cutting.

[0040] See Figure 4 as well as Figure 5 The first end wall 11 is also provided with a ring beam 40, which surrounds the opening 111 and covers the first welded component 221 and the annular welded component 50. This strengthens the connection between the first welded component 221 and the annular welded component 50 and seals the connection gap between them, thereby further improving the waterproofing effect.

[0041] Furthermore, the pipe section 22 to be cut has reinforcing ribs 224 extending from the cut end face, and the reinforcing ribs 224 are anchored into the ring beam 40. Specifically, the pipe section 22 to be cut is a reinforced concrete structure. When cutting the pipe section 22, the reinforcing ribs 224 inside the pipe section 22 can be retained, and then the reinforcing ribs 224 are anchored into the ring beam 40, thereby further improving the structural strength of the pipe section 22 after cutting. Furthermore, the shear members 223 of the pipe section 22 to be cut are also anchored into the ring beam 40, thereby further improving the structural strength of the pipe section 22 after cutting.

[0042] See Figure 5A first water-stop strip 61 is provided at the contact surface between the ring beam 40 and the first welded component 221. Preferably, the first water-stop strip 61 is located at the weld joint between the annular welded component 50 and the first welded component 221, thereby improving the waterproofing effect. Similarly, a second water-stop strip 62 is provided at the contact surface between the ring beam 40 and the annular welded component 50. Preferably, the first water-stop strip 61 is located at the weld joint of the annular welded component 50, thereby improving the waterproofing effect. Preferably, both the first water-stop strip 61 and the second water-stop strip 62 are water-swellable water-stop strips.

[0043] Optionally, in one embodiment, a third weldment (not shown) is provided between two adjacent pipe sections 22. The third weldment covers the connection gap between the two adjacent pipe sections 22 and is welded to the two adjacent pipe sections 22, thereby further improving the waterproof effect.

[0044] Optionally, in one embodiment, the pipe section 22 is further provided with a grouting pipe 70 that penetrates the inner and outer walls of the pipe section 22. The grouting pipe 70 is used to inject filling grout into the gap between the pipe section 22 and the jacking pipe channel 20 to fill the gap between the pipe section 22 and the jacking pipe channel 20, thereby improving the support effect of the pipe section 22 on the jacking pipe channel 20 and the waterproof effect.

[0045] Furthermore, another embodiment of this application provides a construction method for constructing a pipe jacking project body according to any of the above embodiments, including the following steps;

[0046] S110: Based on the existing structural layout of the launching shaft 30 and receiving shaft 10, the tunneling axis 21 of the pipe jacking machine is planned, wherein the tunneling axis 21 is obliquely intersecting with the first end wall 11 of the receiving shaft 10.

[0047] S120: Construct a retaining wall 12 inside the receiving well 10, so that the retaining wall 12 has a second end wall 121 perpendicular to the tunneling axis 21, and reserve an outlet 122 on the second end wall 121, and make the retaining wall 12 and the first end wall 11 together enclose to form a box, and fill the box with soil 13.

[0048] S130: The pipe section 22 is jacked from the launching shaft 30 to the receiving shaft 10 along the predetermined tunneling axis 21 using a pipe jacking machine.

[0049] S140: The pipe jacking machine exits from the outlet 122 of the second end wall 121 and leaves the receiving well 10.

[0050] S150: Remove the retaining wall 12 and excavate the soil 13 inside the box.

[0051] Optionally, such as Figure 2 As shown, in one embodiment, step S110 further includes the following steps:

[0052] S111: Based on the positional relationship between the receiving well 10 and the tunneling axis 21, determine the number of pipe sections 22 to be cut and the cutting range;

[0053] S112: When producing pipe section 22, a first welded part 221 and a shear-resistant member 223 are reserved at the cutting positions of several pipe sections 22 that need to be cut, and a second welded part 222 connected to the first welded part 221 is reserved on the outer wall of the cut pipe section 22.

[0054] Optionally, in one embodiment, step S150 further includes the following step:

[0055] S161: Cut the pipe sections 22 that need to be cut according to the predetermined cutting range, so that the first welded part 221 and the shear-resistant member 223 reserved in the cutting position inside the pipe section 22 are exposed.

[0056] S162: Weld the first welded part 221 and the second welded part 222 to the annular welded part 50 reserved in the opening 111 of the receiving well 10 and fix them together.

[0057] S163: Construct a ring beam 40 around the opening 111 of the receiving well 10, so that the shear-resistant member 223 and the reinforcing bar 224 of the pipe section 22 are anchored into the ring beam 40, and at the same time the ring beam 40 covers the first welded part 221 and the annular welded part 50.

[0058] The construction method of the above-mentioned pipe jacking project involves setting up a retaining wall 12 inside the receiving shaft 10, so that the retaining wall 12 and the first end wall 11 together form a box, and then filling the box with soil 13. Since the retaining wall 12 includes a second end wall 121 perpendicular to the tunneling axis 21, the pipe jacking machine, which originally needed to jack through the first end wall 11 when entering the receiving shaft 10, can be replaced by the second end wall 121 perpendicular to the tunneling axis 21. Therefore, when the pipe jacking machine enters the receiving shaft 10 along the tunneling axis 21 from the outlet 122 of the second end wall 121, it is ensured that the working end face (i.e., the tunnel face) of the pipe jacking machine can remain parallel to the second end wall 121. This ensures that both sides of the pipe jacking machine can simultaneously penetrate the soil 13, thereby ensuring the force balance on both sides of the pipe jacking machine, preventing the pipe jacking machine from deflecting during the tunneling process, and thus ensuring the smooth progress of the pipe jacking construction. Simultaneously, the cut pipe section 22 is welded to the annular weldment 50 via the first weldment 221. This strengthens the structural strength of the cut pipe section 22 and seals the gap between them, thus improving its waterproof performance. Furthermore, by anchoring the reinforcing ribs 224 and shear-resistant members of the cut pipe section 22 into the ring beam 40, and having the ring beam 40 cover the first weldment 221 and the annular weldment 50, the connection strength between the first weldment 221 and the annular weldment 50 is further enhanced, and the connection gap is sealed, further improving the waterproof effect and the structural strength of the cut pipe section 22.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

[0061] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A pipe jacking engineering structure, characterized in that, It includes a launching well, a receiving well, and a pipe jacking channel connecting the launching well and the receiving well; The receiving shaft has a first end wall that is inclined to intersect the tunneling axis of the pipe jacking machine. A retaining wall is provided inside the receiving shaft. The retaining wall and the first end wall together enclose a box. The retaining wall includes a second end wall that is perpendicular to the tunneling axis. The second end wall has an outlet for the pipe jacking machine to pass through. The box is filled with soil, which includes foamed lightweight soil. The jacking channel is provided with multiple pipe sections, which are arranged sequentially along the jacking channel. Among the multiple pipe sections, there is a pipe section that needs to be cut, which intersects with the first end wall. The pipe section that needs to be cut has a cutting end face that is flush with the first end wall. The cutting end face is provided with a first welding member. The first end wall has an opening for the jacking machine to pass through. The first end wall is provided with an annular welding member around the opening. The first welding member is welded to the annular welding member. The first end wall is also provided with a ring beam, which surrounds the opening and covers the first welded part and the annular welded part; The pipe section to be cut has a reinforcing rib extending from the cutting end face, and the reinforcing rib is anchored into the ring beam; The contact surface between the ring beam and the first welded component is provided with a first water-stop strip; and / or, the contact surface between the ring beam and the annular welded component is provided with a second water-stop strip.

2. The pipe jacking engineering body according to claim 1, characterized in that, The first end wall has an opening through which the pipe jacking machine passes. The retaining wall also includes a first side wall and a second side wall respectively arranged on both sides of the opening. One end of the first side wall is connected to the first end wall, and the other end of the first side wall is connected to the second end wall. One end of the second side wall is connected to the first end wall, and the other end of the second side wall is connected to the second end wall.

3. The pipe jacking engineering body according to claim 2, characterized in that, The first sidewall is arranged parallel to the tunneling axis; and / or, the second sidewall is arranged perpendicular to the second end wall.

4. The pipe jacking project body according to claim 1, characterized in that, The outer wall of the pipe section to be cut is also provided with a second welding component connected to the first welding component, and the second welding component is welded to the first welding component and / or the annular welding component.

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