A water intake jacking pipe structure and construction method for crossing Linjiang Railway

Abstract

The present invention discloses a water intake jacking pipe structure and construction method for crossing a riverside railway, comprising a riverside working well connected to a water intake head arranged on the riverside side of the railway and a pump house foundation pit arranged on the riverside side of the railway, wherein a water intake pump house and a construction platform for launching and receiving jacking pipe equipment adjacent to the riverside side of the water intake pump house are arranged in the pump house foundation pit, and the construction platform is connected to the riverside working well through a water intake structure crossing the railway from underground. This ensures that the water intake structure and the water intake pump house have the conditions for simultaneous construction under the normal operation of the railway, which can improve construction efficiency, speed up construction progress, and effectively shorten the construction period. In addition, the transportation costs of jacking pipe equipment on both sides of the railway are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of water intake jacking pipe engineering, and in particular to a water intake jacking pipe structure crossing a Linjiang railway and a construction method. Background Art

[0002] Linjiang water intake projects usually consist of water intake heads, water diversion pipelines and water intake pump houses. However, due to the influence of terrain, landforms and land acquisition and demolition, water intake heads and water intake pump houses cannot be arranged in a centralized manner and need to be connected by a long water diversion pipeline. When the water diversion pipeline needs to cross the railway, if the open excavation and concealed burial method is adopted, it will not only interrupt the ground railway traffic and affect the production and life of local residents, but also have a certain impact on the surrounding ecological environment. Therefore, the use of pipe jacking construction is a reasonable and efficient way to take water.

[0003] When the pipe jacking passes through the railway, the water intake head and the water intake pump room are located on both sides of the railway respectively. Due to the large size and weight of the pipe jacking equipment, in order to meet the needs of the normal operation of the railway, the pipe jacking equipment on both sides of the railway do not have the conditions for intercommunication. In particular, the pipe jacking equipment on the riverside needs to be transported to the working face by ship, which not only prolongs the construction period but also has high costs. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention provides a water intake jacking pipe structure and construction method crossing the Linjiang Railway, so as to ensure that the water intake structure and the water intake pump house are constructed at the same time when the railway is operating normally, thereby improving the construction efficiency, accelerating the construction progress, and effectively shortening the construction period. In addition, the transportation cost of the jacking pipe equipment on both sides of the railway is avoided.

[0005] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0006] On the one hand, the present invention provides a water intake jacking structure that crosses a riverside railway, comprising a riverside working well located on the riverside side of the railway and connected to a water intake head, and a pump house foundation pit located on the riverside side of the railway. A water intake pump house and a construction platform for starting and receiving jacking equipment adjacent to the riverside side of the water intake pump house are provided in the pump house foundation pit. The construction platform is connected to the riverside working well via a water intake structure that crosses the railway underground.

[0007] The construction platform and the water intake pump house are both located in the pump house foundation pit. A construction platform for the pipe jacking equipment can be reserved while the pump house foundation pit is being excavated. No secondary excavation is required, and during the jacking construction of the pipe jacking equipment, the subsequent construction of the pump house foundation pit is not affected. The two can be carried out at the same time, which can improve construction efficiency.

[0008] Preferably, the construction platform includes two mutually connected starting platforms and receiving platforms, and the riverside working well includes two independent first riverside working wells and second riverside working wells; the starting platform is connected to the first riverside working well through the first water intake jack pipe of the water intake structure, and the receiving platform is connected to the second riverside working well through the second water intake jack pipe of the water intake structure.

[0009] The design of two water intake jacking pipes allows the jacking equipment to return to the original construction platform again, without the need to cross the railway from the ground or transport it by water from the river, saving the transportation cost of the jacking equipment on both sides of the railway. At the same time, the two water intake jacking pipes can meet the demand for water intake.

[0010] It is further preferred that a reaction force structure for providing a jacking force to the pipe jacking equipment is arranged on the starting platform. The setting of the reaction force frame helps the pipe jacking equipment to jack forward on the starting platform, and can reduce the area of ​​the starting platform.

[0011] It is further preferred that the reaction structure includes a reaction frame, a tooth wall formed on the basis of the reaction frame, and an anchor rod for fixing the tooth wall. The provision of the tooth wall and the anchor rod can increase the basic stability of the reaction frame, so that the reaction frame is stable and reliable during the jacking process of the jacking equipment.

[0012] Preferably, the water intake structure is formed by splicing a plurality of prefabricated reinforced concrete pipe sections, and the pipe sections are connected by flexible joints, which can prevent the connection of the pipe sections from breaking due to ground settlement.

[0013] Preferably, the elevation of the construction platform is consistent with the bottom elevation of the water intake structure. In this way, after the jacking equipment is installed on the starting platform, the first water intake jacking pipe can be directly constructed. At the same time, after the jacking equipment completes the construction of the second water intake jacking pipe, it can be directly disassembled on the receiving platform, and after disassembly, it can be smoothly transported out of the construction branch hole through the starting platform.

[0014] Preferably, the construction platform is connected to the outside world through a construction branch hole. Due to the large change in river water level and the limitation of water pump suction range, the buried depth of the pump room is large, the excavation depth of the foundation pit is deep, and the height difference between the construction platform and the ground is large. Therefore, a construction branch hole is used to lead obliquely downward from the ground to the construction platform as a transportation channel for the jacking equipment to enter and exit. The construction branch hole can also be used as a transportation channel for slag excavation and concrete pouring of the pump room foundation pit.

[0015] Preferably, the pipe jacking equipment adopts a slurry-balanced pipe jacking machine. The pipe jacking equipment is selected according to the different properties of the strata. Among them, the slurry-balanced pipe jacking machine can be used for silty soil and sandy soil layers with a small permeability coefficient. The jacking section is close to the river bank and is located below the normal water level. The strata through which the jacking pipe passes are mudstone and muddy siltstone, so a slurry-balanced pipe jacking machine is selected.

[0016] On the other hand, the present invention also provides a construction method for a water intake jacking pipe structure crossing the Linjiang Railway, the construction method comprising the following steps:

[0017] S1. Excavate the foundation pit of the pump house according to the construction schedule. When the foundation pit of the pump house is excavated to the bottom elevation of the water intake structure, reserve the starting platform and receiving platform of the jacking pipe equipment, and at the same time construct a construction branch hole from the ground to the starting platform;

[0018] S2. Construct a reaction frame on the reserved starting platform. After the reaction frame is constructed, use the jacking equipment to start the jacking construction of the first water intake jacking pipe. During the jacking construction of the first water intake jacking pipe, the excavation and support construction of the pump room foundation pit below the starting platform elevation is carried out at the same time;

[0019] S3. After the construction of the first water intake jacking pipe is completed, the gantry crane set at the wellhead of the first Linjiang working well is used to lift the jacking pipe equipment out of the well, turn it around and move it into the second Linjiang working well;

[0020] S4. Use the jacking equipment to start the jacking construction of the second water intake jacking pipe. During the jacking construction of the second water intake jacking pipe, the excavation and support construction of the pump house foundation pit below the receiving platform elevation is carried out simultaneously; before the jacking of the second water intake jacking pipe is completed, the concrete pouring of the water intake well in the pump house foundation pit below the starting platform and the receiving platform elevation and the backfilling of earth and stone between the water intake well and the excavation slope of the pump house foundation pit need to be completed, and the backfill elevation is the receiving platform elevation;

[0021] S5. After the construction of the second water intake jacking pipe is completed, after the jacking pipe equipment is removed on the receiving platform, a transport vehicle is used to transport the jacking pipe equipment to the ground site for storage via the starting platform and the construction branch tunnel;

[0022] S6. Backfill the earth and stone in the areas above the starting platform elevation and other backfill areas until the filling is completed.

[0023] Preferably, the total jacking force of the first water intake jacking pipe and the second water intake jacking pipe is equal to the sum of the head-on resistance and the side resistance; when the total jacking force of the first water intake jacking pipe and the second water intake jacking pipe is greater than the maximum jacking force allowed by the pipe section, a relay room should be set. The outer diameter of the relay room shell is the same as the outer diameter of the pipe section, which can reduce soil disturbance, ground settlement and jacking resistance.

[0024] The present invention was used to conduct technical research on a water intake jacking scheme that crosses the Linjiang Railway. The project is located on the bank of the Yangtze River, with the water intake head and pump house located on both sides of the railway. The maximum excavation depth of the pump house reaches 80m, and the jacking starting platform is 13m away from the bottom of the pump house foundation pit. The single pipe of the water intake structure is 583 meters long, and the burial depth of the part crossing the railway is 32m. The surface layers of the jacking section are mostly sandy and gravel layers, sandy loam, silt sand, and pebbles with silt soil of the I and II terrace alluvial layers, with a thickness of about 8 to 32m; the underlying bedrock is mudstone and muddy siltstone, mostly micro-new rock mass. Through research and analysis, the technical solution of the present invention has the following advantages and beneficial effects:

[0025] (1) The water intake jacking pipe structure of the present invention that crosses the Linjiang Railway can adapt to the complex geological environment of Linjiang, avoid large-scale open excavation, reduce the occupation of farmland and house land acquisition area by about 81 acres, and at the same time ensure the normal operation of railway traffic.

[0026] (2) Without affecting the excavation of the pump station foundation pit, a starting platform and a receiving platform for the pipe jacking equipment are reserved. Only a single pipe jacking equipment can be used to complete the construction of the two water intake pipes crossing the Linjiang Railway. The pipe jacking construction does not affect the excavation of the pump station foundation pit and the linear construction period of the pump station water inlet well and other buildings, shortening the construction period by about 12 months.

[0027] (3) It avoids the transfer of pipe-jacking machinery and pipes on both sides of the railway, the construction of riverside docks and long-distance water transportation, and can save about 250,000 yuan in project investment.

[0028] (4) The foundation of the jacking starting platform is reinforced with tooth walls and anchor rods, which can reduce the area of ​​the starting platform and make the reaction frame stable and reliable during the jacking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the planar layout structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the planar structure of the originating platform and the receiving platform of the present invention;

[0031] Figure 3 It is a cross-sectional view of the launching platform of the present invention.

[0032] Figure markings: 1-pump house foundation pit; 2-water intake pump house; 21-water inlet well; 3-construction platform; 31-starting platform; 32-receiving platform; 4-reaction structure; 41-reaction frame; 42-tooth wall; 43-anchor rod; 5-riverside working well; 51-first riverside working well; 52-second riverside working well; 6-water intake structure; 61-first water intake jacking pipe; 62-second water intake jacking pipe; 7-water intake head; 8-railway; 9-construction branch tunnel. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary description and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only for exemplary description and cannot be understood as a limitation on this patent.

[0034] The following is combined with Figures 1 to 3 The present invention is further described with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0035] like Figures 1 to 3 As shown, this embodiment provides a water intake jacking pipe structure crossing the Linjiang Railway, including a pump house foundation pit 1, a water intake pump house 2, a construction platform 3, a water intake structure 6, a Linjiang working well 5 and a water intake head 7. Among them, the Linjiang working well 5 is arranged on the side of the railway 8 facing the river and is connected with the water intake head 7; the pump house foundation pit 1 is arranged on the side of the railway 8 facing away from the river, and the pump house foundation pit 1 is provided with a water intake pump house 2 and a construction platform 3 for starting and receiving jacking equipment adjacent to the side of the water intake pump house 2 facing the river, and the construction platform 3 is connected with the Linjiang working well 5 through the water intake structure 6 crossing the railway 8 from underground. The construction platform 3 and the water intake pump house 2 are both in the pump house foundation pit 1, and the construction platform 3 of the jacking equipment can be reserved while the pump house foundation pit 1 is excavated, without the need for secondary excavation, and the jacking equipment does not affect the subsequent construction of the pump house foundation pit 1 during the jacking construction process, and the two can be carried out at the same time, which can improve the construction efficiency.

[0036] In this embodiment, the construction platform 3 includes two mutually connected starting platforms 31 and receiving platforms 32, and the riverside working well 5 includes two mutually independent first riverside working wells 51 and second riverside working wells 52; the starting platform 31 is connected to the first riverside working well 51 through the first water intake jacking pipe 61 of the water intake structure 6, and the receiving platform 32 is connected to the second riverside working well 52 through the second water intake jacking pipe 62 of the water intake structure 6. Designing two water intake jacking pipes facilitates the pipe jacking equipment to return to the original construction platform 3 again, without crossing the railway 8 from the ground or transporting by water from the river surface, saving the transportation cost of the pipe jacking equipment on both sides of the railway 8. At the same time, the two water intake jacking pipes can meet the demand for water intake.

[0037] Furthermore, the first riverside working shaft 51 and the second riverside working shaft 52 are both located on the riverside, and both adopt reinforced concrete lining structures. The clearance dimensions of the first riverside working shaft 51 and the second riverside working shaft 52 need to meet the requirements for receiving and starting construction of the pipe jacking machine.

[0038] The starting platform 31 is provided with a reaction structure 4 for providing a jacking force to the jacking equipment. The reaction structure 4 includes a reaction frame 41, a tooth wall 42 formed on the basis of the reaction frame 41, and an anchor rod 43 for fixing the tooth wall 42. The anchor rod 4310 has a diameter of 25 to 28 mm, a length of 9 to 12 m, and is arranged obliquely downward with a spacing of 120 to 150 cm. The arrangement of the tooth wall 42 and the anchor rod 43 can increase the foundation stability of the reaction frame 41, so that the reaction frame 41 is stable and reliable during the jacking process of the jacking equipment. The length and width of the starting platform 31 are determined according to the layout requirements of the reaction frame 41. The arrangement of the reaction frame 41 helps the jacking equipment to jack forward on the starting platform 31, and can reduce the area of ​​the starting platform 31.

[0039] The first water intake jack pipe 61 and the second water intake jack pipe 62 are both formed by splicing multiple prefabricated reinforced concrete pipe sections, and the pipe sections are all prefabricated with reinforced concrete. The inner diameter of the pipe section is determined according to the water intake flow rate and hydraulic calculation analysis of the water intake pump room 2. The thickness of the pipe section and the amount of reinforcement are determined by calculation and analysis according to the deadweight of the pipe section, the surrounding rock pressure, the external water pressure, the internal water pressure and the grouting pressure. The pipe sections are connected by flexible joints, which can prevent the connection of the pipe section from breaking due to ground settlement.

[0040] In this embodiment, the elevations of the starting platform 31 and the receiving platform 32 are consistent with the bottom elevations of the first water intake jacking pipe 61 and the second water intake jacking pipe 62. In this way, after the jacking equipment is installed on the starting platform 31, the first water intake jacking pipe 61 can be directly constructed. At the same time, after the jacking equipment completes the construction of the second water intake jacking pipe 62, it can be directly disassembled on the receiving platform 32, and after disassembly, it can be smoothly transported out of the construction branch hole 9 through the starting platform 31.

[0041] Furthermore, the starting platform 31 and the receiving platform 32 are interconnected, and the starting platform 31 is connected to the outside world through the construction branch hole 9. Due to the large change in the river water level and the limitation of the water pump suction elevation, the buried depth of the pump room is large, the maximum excavation depth of the foundation pit is 80 meters, and the height difference between the construction platform 3 and the ground reaches 67 meters. Therefore, the construction branch hole 9 is used to lead obliquely downward from the ground to the construction platform 3 as a transportation channel for the jacking equipment to enter and exit. The construction branch hole 9 can also be used as a transportation channel for the excavation of slag and concrete pouring of the pump room foundation pit 1.

[0042] In this embodiment, the pipe jacking equipment adopts a slurry-balanced pipe jacking machine. The pipe jacking equipment is selected according to the different properties of the strata. Among them, the slurry-balanced pipe jacking machine can be used for silty soil and sandy soil layers with a small permeability coefficient. The jacking section is close to the river bank and is located below the normal water level. The strata through which the jacking pipe passes are mudstone and muddy siltstone, so a slurry-balanced pipe jacking machine is selected.

[0043] Based on the above structure, this embodiment also provides a construction method for a water intake jacking pipe structure that crosses the riverside railway 8. Due to the large size and weight of the jacking pipe equipment, the large jacking pipe equipment cannot enter the riverside water intake construction area due to the barrier restriction of the railway 8. Therefore, the first water intake jacking pipe (the first water intake jacking pipe 61) is jacked from the pump room foundation pit 1 to the first riverside working well 51 on the riverside side. The construction method includes the following steps:

[0044] S1, excavate the pump house foundation pit 1 according to the construction schedule. When the pump house foundation pit 1 is excavated to the bottom elevation of the water intake structure 6, reserve the starting platform 31 and the receiving platform 32 of the jacking equipment, and construct the construction branch hole 9 from the ground to the starting platform 31;

[0045] S2, constructing a reaction frame 41 on the reserved starting platform 31. After the construction of the reaction frame 41 is completed, the jacking construction of the first water intake jacking pipe 61 is started by using a jacking pipe equipment. During the jacking construction of the first water intake jacking pipe 61, the excavation and support construction of the pump room foundation pit 1 below the elevation of the starting platform 31 is carried out at the same time;

[0046] S3. After the construction of the first water intake jacking pipe 61 is completed, the gantry crane set at the wellhead of the first riverside working well 51 is used to lift the jacking pipe equipment out of the well, turn it around and move it into the second riverside working well 52;

[0047] S4, using the jacking equipment to start the jacking construction of the second water intake jacking pipe 62, during the jacking construction process of the second water intake jacking pipe 62, the excavation and support construction of the pump house foundation pit 1 below the elevation of the receiving platform 32 is carried out at the same time; before the jacking of the second water intake jacking pipe 62 is completed, the concrete pouring of the water inlet well 21 in the pump house foundation pit 1 below the elevation of the starting platform 31 and the receiving platform 32 and the backfilling of earth and stone between the water inlet well 21 and the excavated slope of the pump house foundation pit 1 need to be completed, and the backfill elevation is the elevation of the receiving platform 32;

[0048] S5. After the construction of the second water intake jacking pipe 62 is completed, after the jacking pipe equipment is removed from the receiving platform 32, a transport vehicle is used to transport the jacking pipe equipment to the ground site for storage via the starting platform 31 and the construction branch tunnel 9;

[0049] S6. Backfill the earth and stone in the area above the starting platform 31 elevation and other backfill areas until the filling is completed.

[0050] Furthermore, the total jacking force F0 of the first water intake jacking pipe 61 and the second water intake jacking pipe 62 is equal to the head-on resistance NF+side resistance Nk. When the total jacking force F0 of the jacking pipe is greater than the maximum allowable jacking force Fdc of the pipe segment, a relay room should be set, and the number thereof is n. F0, NF, Nk, Fdc, and n are calculated according to formulas 8.1.1, 12.4.1, 12.4.4 and Table 12.4.2 of the Technical Code for Jacking Pipes in Water Supply and Drainage Projects (CECS 246-2008). The outer diameter of the relay room shell is the same as the outer diameter of the pipe segment, which can reduce soil disturbance, ground settlement, and jacking resistance.

[0051] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the water intake jacking pipe structure and construction method for crossing the Linjiang Railway of the present invention, and can produce the positive effects recorded in the present invention.

[0052] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or position relationship in the present invention are only used for exemplary description and cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the drawings and according to the specific circumstances. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0053] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A water intake jacking pipe structure crossing the Linjiang Railway, characterized in that: The invention comprises a riverside working well (5) provided on the riverside side of a railway (8) and connected to a water intake head (7), and a pump house foundation pit (1) provided on the riverside side of the railway (8), wherein a water intake pump house (2) and a construction platform (3) for launching and receiving pipe jacking equipment adjacent to the riverside side of the water intake pump house (2) are provided in the pump house foundation pit (1), wherein the construction platform (3) and the riverside working well (5) are connected via a water intake structure (6) passing through the railway (8) underground; the water intake structure (6) is formed by splicing a plurality of prefabricated reinforced concrete pipe sections, and the pipe sections are connected by flexible joints; The construction platform (3) comprises two mutually connected starting platforms (31) and receiving platforms (32); the riverside working well (5) comprises two mutually independent first riverside working wells (51) and second riverside working wells (52); the starting platform (31) is connected to the first riverside working well (51) via a first water intake jack pipe (61) of a water intake structure (6); the receiving platform (32) is connected to the second riverside working well (52) via a second water intake jack pipe (62) of the water intake structure (6); The construction method of the water intake jacking pipe structure crossing the Linjiang Railway comprises the following steps: S1. Excavation of the pump house foundation pit (1) is arranged according to the construction schedule. When the pump house foundation pit (1) is excavated to the bottom elevation of the water intake structure (6), a starting platform (31) and a receiving platform (32) for the jacking equipment are reserved, and at the same time, a construction branch hole (9) leading from the ground to the starting platform (31) is constructed; S2, constructing a reaction frame (41) on the reserved starting platform (31). After the construction of the reaction frame (41) is completed, using a jacking device to start the jacking construction of the first water intake jacking pipe (61). During the jacking construction of the first water intake jacking pipe (61), excavation and support construction of the pump room foundation pit (1) below the elevation of the starting platform (31) is simultaneously carried out; S3, after the construction of the first water intake jacking pipe (61) is completed, the gantry crane provided at the wellhead of the first riverside working well (51) is used to lift the jacking pipe equipment out of the well, and then turn and move it into the second riverside working well (52); S4, using a jacking device to start the jacking construction of the second water intake jacking pipe (62), during the jacking construction of the second water intake jacking pipe (62), the excavation and support construction of the pump house foundation pit (1) below the elevation of the receiving platform (32) is carried out simultaneously; before the jacking of the second water intake jacking pipe (62) is completed, the concrete pouring of the water intake well (21) in the pump house foundation pit (1) below the elevation of the starting platform (31) and the receiving platform (32) and the backfilling of earth and stone between the water intake well (21) and the excavated slope of the pump house foundation pit (1) need to be completed, and the backfilling elevation is the elevation of the receiving platform (32); S5. After the construction of the second water intake jacking pipe (62) is completed, the jacking pipe equipment is removed from the receiving platform (32), and then the jacking pipe equipment is transported to the ground site for storage via a transport vehicle through the starting platform (31) and the construction branch tunnel (9); S6. Backfill the earth and stone in the area above the starting platform (31) and other backfill areas until the filling is completed.

2. The water intake jacking pipe structure crossing the Linjiang Railway according to claim 1 is characterized in that: The launching platform (31) is provided with a reaction force structure (4) for providing a jacking force to the pipe jacking equipment.

3. The water intake jacking pipe structure crossing the Linjiang Railway according to claim 2 is characterized in that: The reaction force structure (4) comprises a reaction force frame (41), a tooth wall (42) formed on the basis of the reaction force frame (41), and an anchor rod (43) for fixing the tooth wall (42).

4. The water intake jacking pipe structure crossing the Linjiang Railway according to claim 1 is characterized in that: The elevation of the construction platform (3) is consistent with the bottom elevation of the water intake structure (6).

5. The water intake jacking pipe structure crossing the Linjiang Railway according to claim 1 is characterized in that: The construction platform (3) is connected to the outside world through a construction branch hole (9).

6. The water intake jacking pipe structure crossing the Linjiang Railway according to claim 1 is characterized in that: The pipe jacking equipment adopts a mud-water balanced pipe jacking machine.

7. The water intake jacking pipe structure crossing the Linjiang Railway according to claim 1 is characterized in that: The total jacking force of the first water intake jacking pipe (61) and the second water intake jacking pipe (62) is equal to the sum of the head-on resistance and the side resistance; when the total jacking force of the first water intake jacking pipe (61) and the second water intake jacking pipe (62) is greater than the maximum allowable jacking force of the pipe joint, a relay room should be provided.

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