Super-large-section rectangular pipe jacking construction equipment used in complex environment

Abstract

The invention provides super-large section rectangular pipe jacking construction equipment used in a complex environment, and belongs to the technical field of underground space construction equipment.The super-large section rectangular pipe jacking construction equipment comprises a front-end subsystem, a main driving system, a rear-end propelling subsystem and an integrated control system, and the front-end subsystem comprises a low-disturbance combined cutterhead and a front shield scraper knife assembly which are arranged in the tunneling direction; the main driving system is in redundant design, a motor speed reducer mounting hole site is reserved, and a motor matched with the low-disturbance combined cutterhead is configured; the rear-end propelling subsystem comprises a propelling frame and an equal-thrust double-stroke oil cylinder which are modularly assembled; the integrated control system comprises a soil pressure measurement and control module and a guide module; the stable construction performance can still be kept under the conditions that the single-time jacking distance is long, and water-rich and water-gushing and sand-gushing stratums are crossed, meanwhile, the special requirement for the large rectangular cross section is met, and therefore the construction efficiency is effectively improved, the safety risk is reduced, and the engineering quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of underground space construction equipment, and in particular to ultra-large cross-section rectangular pipe jacking construction equipment used in complex environments. Background Art

[0002] In underground space development, rectangular pipe jacking technology has gradually become the mainstream method for urban underground tunnel construction due to its advantages such as high cross-section utilization and small cover depth. However, the implementation of ultra-large cross-section rectangular pipe jacking projects in complex environments still faces severe challenges, specifically:

[0003] 1. Complex geological conditions: The construction area mainly passes through silt-sand and silt-sand strata. The silt-sand strata are slightly dense to medium dense, with low strength, poor uniformity, and weak permeability; the silt-sand strata are medium dense to dense, with medium permeability and strong water-rich properties. This type of stratum has poor self-stability and is prone to causing excavation face instability and water and sand gushing, placing extremely high demands on the jacking machine's posture control and surface settlement accuracy. 2. Defects in ultra-large cross-section construction: The traditional rectangular jacking machine cutterhead layout makes it difficult to cover the entire excavation face. Residual soil in blind areas leads to uneven cutting, exacerbating ground disturbance. During long-distance jacking, conventional drive systems have low torque redundancy and a high risk of downtime due to failures. 3. Weak dynamic control capabilities: In water-rich strata, the excavation capacity of a single screw conveyor is limited, and the soil bin pressure fluctuates greatly, which can easily cause excavation face collapse. The guidance system relies on manual measurement and has poor real-time performance.

[0004] Therefore, there is an urgent need for an integrated equipment specifically for the construction of large-section rectangular jacking pipes in complex formations. Summary of the Invention

[0005] Purpose of the invention: The purpose of the present invention is to address the deficiencies of the existing technology and provide a super-large cross-section rectangular jacking pipe construction equipment for complex environments, ensuring that stable construction performance can be maintained when a single jacking distance is long and passes through water-rich and water-prone sand-gushing formations, while adapting to the special needs of large rectangular cross-sections, thereby effectively improving construction efficiency, reducing safety risks, and ensuring project quality.

[0006] Technical solution: The present invention relates to an ultra-large cross-section rectangular pipe jacking construction equipment for complex environments, comprising a front-end subsystem, a main drive system, a rear-end propulsion subsystem and an integrated control system. The front-end subsystem comprises a low-disturbance combined cutterhead 1 and a front shield blade assembly 2 arranged in the direction of excavation; the low-disturbance combined cutterhead 1 is vertically divided into an upper row and a lower row, the upper cutterhead in the upper row comprises a large cutterhead 101 arranged at the center, and a middle cutterhead 102 is respectively arranged on both sides of the large cutterhead 101, and the middle cutterhead 102 and the large cutterhead 101 are connected to each other. A small cutter disc 103 is provided in the middle position; the lower cutter disc in the lower row includes a middle cutter disc 102 provided in the center, with a large cutter disc 101 provided on both sides of the middle cutter disc 102; a group of foam nozzles 104 are evenly distributed on the upper and lower cutter discs; the main drive system is a redundant design, with reserved motor reducer installation holes and a motor compatible with the low-disturbance combined cutter disc 1; the rear-end propulsion subsystem includes a modularly assembled propulsion frame and a constant-thrust double-stroke oil cylinder; the integrated control system includes an earth pressure measurement and control module and a guide module;

[0007] The front-end output shaft of the main drive system is connected to the front-end subsystem, the rear-end input shaft of the main drive is connected to the rear-end propulsion subsystem, and the integrated control system is electrically or signal-connected to the main drive system, the front-end subsystem, and the rear-end propulsion subsystem respectively.

[0008] Furthermore, the front shield blade assembly includes a brim support structure arranged on the upper part of the front cutter disc and a shield blade arranged on the blind area of ​​the cutter disc.

[0009] Furthermore, the modularly assembled propulsion frame includes support rings, and the support rings are provided in a plurality of groups, and each group of support rings is arranged along the axial direction of the entire propulsion frame.

[0010] Furthermore, the support ring is composed of several splicing pieces, two of which are located above and below the support ring group respectively, two of which are located on the left and right sides of the support ring group respectively, and the remaining splicing pieces are respectively arranged at the four corners of the support ring group. The specific shape of the splicing piece depends on its position.

[0011] Furthermore, a plurality of axial fixing blocks are distributed radially on the inner arc surface of the splicing piece and are fixedly connected to the splicing piece. The plurality of axial fixing blocks are fixedly connected to a radial fixing block. The radial fixing blocks are fixedly connected to radial connecting blocks at both radial ends of the splicing piece. The two adjacent splicing pieces are fixedly connected by two radial connecting blocks and bolts.

[0012] Furthermore, the propulsion frame also includes several axial connecting parts, which are used to connect two adjacent support ring groups. Two grooves are provided at the bottom of the axial connecting part, and the two grooves are respectively engaged with the two radial fixing blocks in the two support ring groups. In addition, the axial connecting part is also connected to the radial fixing block by bolts.

[0013] Furthermore, a plurality of oil cylinders fixedly connected to an axial end face of the propulsion frame are evenly distributed, and the number of oil cylinders depends on the area of ​​the axial end face of the splicing piece. The larger the area of ​​the axial end face of the splicing piece, the more oil cylinders are installed on the splicing piece.

[0014] Furthermore, the axial connecting member includes a connecting rod and two buckles, wherein the connecting rod is located between the two buckles, and the two buckles are rotatably connected to the connecting rod, and the buckles are provided with grooves for engaging with the radial fixing blocks.

[0015] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0016] The present invention achieves efficient excavation with minimal impact on the formation under complex geological conditions through the front-end low-disturbance combined cutterhead design and the high-torque, high-reliability main drive system; at the same time, the rear-end precise propulsion system and the high-strength, high-rigidity shell design, as well as the integrated earth pressure measurement and control system and high-precision guidance system, jointly ensure the stability and safety of the pipe jacking machine in the construction of ultra-large cross-section rectangular pipe jacking, greatly improving construction efficiency and quality, reducing construction risks, and being suitable for tunnel construction needs in a variety of complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the low-disturbance combined cutterhead in the present invention;

[0018] Figure 2 It is a structural schematic diagram of the front shield blade assembly of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the shield blade of the present invention;

[0020] Figure 4 is a schematic diagram of the brim support structure of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the propulsion frame in the present invention;

[0022] Figure 6 It is a structural diagram of the splicing piece in the present invention;

[0023] Figure 7 It is the layout diagram of the hydraulic cylinder in the present invention;

[0024] Figure 8This is a schematic diagram of the installation of the earth pressure sensor in the present invention;

[0025] Figure 9 It is a structural diagram of the guide module in the present invention;

[0026] Figure 10 This is the pipe section used in Example 1. In the figure, 1 - low-disturbance combined cutterhead, 101 - large cutterhead, 102 - medium cutterhead, 103 - small cutterhead, 104 - foam nozzle, 2 - front shield blade assembly, 201 - brim support structure, 202 - shield blade, 3 - propulsion frame, 301 - splicing piece, 302 - axial fixing block, 303 - radial connecting block, 304 - radial fixing block, 305 - axial connecting piece, 3051 - connecting rod, 3052 - buckle, 4 - oil cylinder, 5 - soil pressure measurement and control module, 501 - screw conveyor, 502 - soil pressure sensor, 6 - guide module, 601 - dual-axis inclinometer, 602 - theodolite. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0028] In this embodiment, the outer diameter of the pipe section is 11350*7500mm, the inner diameter of the pipe section is 9750*5900mm, the thickness of the pipe section is 800mm, and the width of the pipe section is 1500mm. Figure 10 shown.

[0029] Equipment for constructing ultra-large-section rectangular pipe jacking in complex environments includes a front-end subsystem, a main drive system, a rear-end propulsion subsystem, and an integrated control system. The front-end subsystem comprises a low-disturbance modular cutterhead (1) and a front shield blade assembly (2) positioned in the tunneling direction. The front-end output shaft of the main drive system is connected to the front-end subsystem, while the rear-end input shaft of the main drive is connected to the rear-end propulsion subsystem. The integrated control system is electrically or signal-connected to the main drive system, the front-end subsystem, and the rear-end propulsion subsystem. The main drive system features a redundant design with reserved mounting holes for a motor reducer and is equipped with a motor compatible with the low-disturbance modular cutterhead (1). The rear-end propulsion subsystem comprises a modularly assembled propulsion frame and a constant-thrust, two-stroke hydraulic cylinder. The integrated control system includes an earth pressure measurement and control module and a guide module. The entire equipment housing utilizes a high-strength, high-rigidity design, integrating an earth pressure measurement and control system and a high-precision guide system. This design not only enhances equipment stability but also greatly enhances construction safety, ensuring efficient and reliable construction of ultra-large-section rectangular pipe jacking in complex environments.

[0030] like Figure 1As shown, the low-disturbance combined cutterhead 1 is vertically divided into an upper row and a lower row. The upper cutterhead in the upper row includes a large cutterhead 101 set in the center, with a medium cutterhead 102 set on both sides of the large cutterhead 101, and a small cutterhead 103 set between the medium cutterhead 102 and the large cutterhead 101; the lower cutterhead in the lower row includes a medium cutterhead 102 set in the center, with a large cutterhead 101 set on both sides of the middle cutterhead 102; a group of foam nozzles 104 are evenly distributed on the upper and lower cutterheads. In this embodiment, the low-disturbance combined cutterhead can cover 93% of the entire excavation surface of the ultra-large cross-section rectangular jacking pipe. The diameter of the large cutterhead is designed to be 4.45 meters, the diameter of the medium cutterhead is 3.9 meters, and the diameter of the small cutterhead is 1 meter. Each module is equipped with replaceable carbide blades, and the blade shape and angle are optimized to reduce the cutting resistance to the formation. The cutterhead's speed is controlled at 30-60 rpm to balance excavation efficiency and ground disturbance. Multiple foam injection holes are located on the cutterhead, allowing for the injection of a 3-5% foam concentration to further minimize ground disturbance.

[0031] like Figures 2 to 4 As shown, the front shield blade assembly 2 includes a brim support structure 201 arranged on the upper part of the front cutter disc and a shield blade 202 arranged on the blind area of ​​the cutter disc. The width of the brim support structure 201 is designed to be 0.3 meters and is made of high-strength alloy material. The brim support is used to protect the top of the excavation surface, reduce the collapse and disturbance of the top soil, and ensure the stability of the soil. The angle between the brim and the horizontal plane is designed to be 10° to provide effective soil support. In response to the blind area of ​​the traditional cutter disc, two shield blades 202 are designed on both sides of the front end of the shield body, each blade is 1.0 meters long and 0.2 meters wide. The blade is made of wear-resistant carbide material to improve its cutting performance and life. The shield blade is used to clear the blind area soil between the cutter discs to ensure the integrity of the excavation surface.

[0032] With this cutterhead layout, the large cutterhead speed is controlled at 30 rpm, while the medium and small cutterhead speeds are controlled at 40 rpm during soil cutting operations to minimize soil disturbance. A foam injection system is installed on the cutterhead, injecting a 4% foam concentration to further minimize soil disturbance. The soil pressure measurement and control system monitors and adjusts soil pressure in real time to maintain a stable excavation surface.

[0033] The main drive system features a redundant design, with four motor reducer mounting holes reserved at the front cutterhead of the pipe jacking machine to enable multi-motor parallel drive. Each mounting hole is precisely measured and machined to ensure accurate and stable motor and reducer installation.

[0034] The calculation steps for the redundant drive power design are as follows:

[0035] S1. Calculation of the jacking force F. The jacking force is composed of the friction resistance between the pipeline and the soil, the soil resistance and the additional resistance, which can be simplified as:

[0036] F=π×D×L×f+F 附和

[0037] in:

[0038] D: Pipe outer diameter (unit: m)

[0039] L: Jacking length (unit: m)

[0040] f: Friction resistance per unit area (unit: kN / m 2 The value is determined according to the soil quality. For clay soil, it is about 5 to 15 kN / m 2 , sand soil about 10 ~ 20kN / m 2 )

[0041] F 附加 : Additional resistance (such as the cutting resistance of the cutter head, usually 10% to 30% of the total resistance)

[0042] S2. Selection of propulsion speed v. Conventional construction speed: v = 0.5-2.0 m / min. Adjust according to soil quality, pipe diameter, and equipment capacity. Use a lower value for clayey soil and a higher value for sandy soil.

[0043] S3. Mechanical efficiency η: Hydraulic system efficiency: η = 0.7 to 0.85; Electric drive system efficiency: η = 0.8 to 0.9.

[0044] Motor Selection: The large cutterhead utilizes 21 AC variable-frequency motors with a high torque of 2210 kN·m and a low speed of 0.9 to 1.35 r / min. Each motor has a rated power of no less than 30 kW. The medium cutterhead utilizes 18 AC variable-frequency motors with a high torque of 1890 kN·m and a low speed of 0.9 to 1.35 r / min. Each motor has a rated power of no less than 30 kW. The small cutterhead utilizes two AC variable-frequency motors with a low torque of 55 kN·m and a high speed of 5.2 to 7.8 r / min. Each motor has a rated power of no less than 30 kW. Sufficient space is reserved between the motors and reducers to facilitate heat dissipation and routine maintenance. In the event of a failure of any motor or reducer, the remaining equipment can still maintain at least 75% of the rated torque output to ensure continuous construction.

[0045] The driving power P (unit: kW) of the main drive system is calculated as follows:

[0046]

[0047] in:

[0048] F: jacking force (unit: kN)

[0049] v: propulsion speed (unit: m / min)

[0050] η: System mechanical efficiency (usually 0.7 to 0.9, hydraulic system efficiency is about 70% to 90%)

[0051] like Figure 5 and Figure 6 As shown, the modularly assembled propulsion frame is composed of multiple independent unit components, each of which can be replaced or maintained separately. The propulsion frame unit components are made of high-strength steel to ensure structural strength and durability. The interfaces between modules adopt a standardized design, which facilitates quick assembly and disassembly, and improves on-site installation efficiency. According to different construction requirements, the length and thrust of the propulsion system can be adjusted by increasing or decreasing the number of modules to adapt to the jacking construction of different sections. The propulsion system is equipped with 30 equal-thrust double-stroke cylinders with a telescopic stroke of 2500mm. It is equipped with a stroke sensor to monitor the telescopic stroke of each cylinder. Each cylinder is equipped with an independent servo control system with a stroke control accuracy of ±1mm, ensuring the precise positioning of the pipe jacking machine during the propulsion process. The response time of the cylinder is less than 0.5 seconds, and it responds quickly to operating instructions to improve construction efficiency.

[0052] Specifically, such as Figure 5 As shown, the propulsion frame as a whole is composed of several groups of support ring groups arranged along the propulsion direction, and each group of splicing ring groups includes several splicing pieces 301, two of which are respectively located above and below the support ring group, two of which are respectively located on the left and right sides of the support ring group, and the remaining splicing pieces 301 are respectively arranged at the four corners of the support ring group. The specific shape of the splicing piece 301 depends on its position.

[0053] like Figure 6 As shown, a plurality of axial fixing blocks 302 are radially distributed on the inner arc surface of the splicing piece 301 and are fixedly connected thereto. The plurality of axial fixing blocks 302 are fixedly connected to a radial fixing block 304. The radial fixing blocks 304 are fixedly connected to radial connecting blocks 303 at both ends of the splicing piece 301 in the radial direction. After the axial fixing blocks 302 are fixedly connected to the splicing piece 301 by bolts, the joint surfaces between the axial fixing blocks 302 and the splicing piece 301 are welded; the radial connecting blocks 303 and the radial fixing blocks 304 are integrally arranged. After the radial fixing blocks 304 are fixedly connected to the axial fixing blocks 302 by bolts, the joint surfaces between the radial fixing blocks 304 and 402 and the joint surfaces between the radial fixing blocks 304 and the splicing piece 301 are welded;

[0054] Thus, along the radial direction of the support ring, two adjacent splicing pieces 301 are fixedly connected via two radial connecting blocks 303 and bolts.

[0055] like Figure 5As shown, the propulsion frame also includes a plurality of axial connectors 305, which are used to connect two adjacent support ring groups. Two grooves are provided at the bottom of the axial connector 305, and the two grooves are respectively engaged with the two radial fixing blocks 304 in the two support ring groups. In addition, the axial connector 305 is also connected to the radial fixing block 304 by bolts.

[0056] like Figure 7 As shown, a number of oil cylinders 4 fixedly connected to an axial end face of the propulsion frame are evenly distributed thereon. The number of oil cylinders 4 is determined by the area of ​​the axial end face of the splicing piece 301. The larger the area of ​​the axial end face of the splicing piece 301, the more oil cylinders 4 are installed on the splicing piece 301. Through the above modular design, suitable modular propulsion frame components can be selected and assembled according to the size of the pipe jacking machine and construction requirements. Then install the cylinders and ensure that each cylinder is correctly connected to the independent servo control system. Carry out system debugging and check the working status of each module and cylinder to ensure the stability of the propulsion frame and the individual control function of the cylinder. During the construction process, the status of the cylinder is monitored in real time through the monitoring system, and the propulsion speed and thrust are accurately adjusted according to the construction needs to ensure that the pipe jacking machine is propelled smoothly and accurately.

[0057] like Figure 8 As shown in the figure, the soil pressure measurement and control module includes two sets of screw conveyors and a group of evenly distributed soil pressure sensors. The coordinated control of the two Φ194*560mm screw conveyors effectively reduces soil bin pressure fluctuations, ensuring stability during excavation. Furthermore, multiple high-precision soil pressure sensors are installed within the soil bin to provide real-time feedback on soil pressure, providing accurate data support for operations. Furthermore, precise control of jacking force and speed allows for fine-tuning of soil bin pressure balance, significantly improving the safety and efficiency of pipe jacking operations.

[0058] High-precision earth pressure sensors are installed evenly throughout the soil bin. These sensors have a measuring range of 0-1.5 MPa and an accuracy of ±0.5% FS. These sensors collect real-time earth pressure data within the bin and transmit it to the central control system via a data transmission line. The central control system processes the collected data and displays pressure changes in the bin on a graphical interface, facilitating real-time monitoring by operators.

[0059] The realization of soil bin pressure measurement and control technology requires the coordinated control of screw conveyors: using two sets of Φ194*560mm screw conveyors, the hourly soil output can reach 2×128m 3The screw conveyor is constructed of high-strength, wear-resistant steel to withstand the wear and tear of long-term excavation operations. The screw conveyor speed is controlled between 0 and 12 rpm to accommodate varying soil types and excavation depths. The two screw conveyors operate in tandem via a synchronous controller, ensuring consistent excavation rates and minimizing pressure fluctuations in the soil bin.

[0060] Finely adjust the soil silo pressure balance: A precise servo control system controls the thrust and speed of the pipe jacking machine, maintaining thrust within a range of 100-200 tons and speed within 10-20 mm / minute. Based on real-time data from the soil pressure sensor, the operator can finely adjust the soil silo pressure by adjusting the screw conveyor speed and thrust. The system has preset safety thresholds for soil silo pressure. When pressure exceeds this range, the system automatically issues an alarm and takes measures to adjust it to a safe level.

[0061] like Figure 9 As shown, the guidance module is equipped with an inclinometer on the shield, which can monitor and accurately display the rolling status of the main machine in real time, ensuring accurate guidance of the pipe jacking machine during excavation. At the same time, the innovative introduction of a guidance system equipped with a theodolite, combined with image recognition technology, realizes digital display of guidance data, significantly improving guidance accuracy and visibility. This guidance system is existing technology and can be put into use in this embodiment as long as it can achieve the functions described.

[0062] Dual-axis inclinometers are installed at key locations on the shield to ensure they can accurately sense the roll state of the pipe jacking machine. The inclinometers should be installed horizontally and securely fixed. With a measuring range of ±5° and an accuracy of 0.01°, the inclinometers can monitor the roll angle of the pipe jacking machine in real time and transmit this information to the central control system via a data cable. The central control system is equipped with a display that displays the inclinometer data in real time and issues an alarm if the roll angle of the pipe jacking machine exceeds a preset threshold (e.g., ±0.5°).

[0063] A high-precision theodolite is installed at an appropriate location on the pipe jacking machine to measure its azimuth and elevation. The theodolite has a measurement range of ±180° and an accuracy of 0.1″. Data collected by the theodolite is transmitted wirelessly in real time to the central control system. Markers are placed within the theodolite's field of view, and image recognition technology is used to automatically identify the pipe jacking machine's position and posture. The central control system integrates the data obtained from the theodolite and image recognition technology to display the machine's real-time position and guidance status in the form of a digital image.

[0064] like Figure 9As shown, in one embodiment of the present application, the axial connecting member 305 includes a connecting rod 3051 and two clips 3052, wherein the connecting rod 3051 is located between the two clips 3052, and the two clips 3052 are rotatably connected to the connecting rod 3051, and the clip 3052 is provided with a groove for engaging with the radial fixing block 304; the dual-axis inclinometer 601 and the theodolite 602 are both mounted on the connecting rod 3051; correspondingly, the hole diameter for mounting the bolt in one of the two adjacent radial connecting blocks 303 is larger than the diameter of the bolt, so that the splicing piece 301 has a certain offset margin; in this way, when the height position of the two adjacent support ring groups is offset, the connecting rod 3051 will tilt, so that 601 can monitor the inclination angle of the pipe jacking machine.

[0065] like Figure 10 As shown, through the above system design, the following steps are implemented during construction:

[0066] S1. Install the inclinometer and theodolite, ensure they are firmly fixed, and perform preliminary calibration.

[0067] S2. Connect the inclinometer and theodolite to the central control system and conduct joint system debugging to verify the accuracy of the data and the stability of the system.

[0068] S3. Before the pipe jacking machine is driven, the theodolite and inclinometer are used to calibrate the initial position and posture.

[0069] S4. During the excavation process, the data of the inclinometer and theodolite are monitored in real time, and the propulsion direction and posture of the pipe jacking machine are adjusted through the digital display interface of the central control system.

[0070] S5. Regularly check the working status of the inclinometer and theodolite to ensure the accuracy and reliability of the guidance system.

[0071] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A super-large cross-section rectangular pipe jacking construction equipment for complex environments, comprising a front-end subsystem, a main drive system, a rear-end propulsion subsystem, and an integrated control system, characterized by: The front-end subsystem comprises a low-disturbance combined cutterhead (1) and a front shield blade assembly (2) arranged in the excavation direction; the low-disturbance combined cutterhead (1) is vertically divided into an upper row and a lower row, the upper cutterhead in the upper row comprises a large cutterhead (101) arranged at a central position, a middle cutterhead (102) is respectively arranged on both sides of the large cutterhead (101), and a small cutterhead (103) is arranged between the middle cutterhead (102) and the large cutterhead (101); the lower cutterhead in the lower row comprises a A middle cutter disc (102) is located at the center, and a large cutter disc (101) is provided on both sides of the middle cutter disc (102); a group of foam nozzles (104) are evenly arranged on the upper cutter disc and the lower cutter disc; the main drive system is a redundant design, with a motor reducer installation hole reserved, and a motor compatible with the low-disturbance combined cutter disc (1) is configured; the rear-end propulsion subsystem includes a modularly assembled propulsion frame and an equal-thrust double-stroke oil cylinder; the integrated control system includes an earth pressure measurement and control module and a guide module; The front-end output shaft of the main drive system is connected to the front-end subsystem, the rear-end input shaft of the main drive is connected to the rear-end propulsion subsystem, and the integrated control system is electrically or signal-connected to the main drive system, the front-end subsystem, and the rear-end propulsion subsystem respectively.

2. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 1, characterized in that: The front shield blade assembly (2) comprises a brim support structure (201) arranged on the upper portion of the front cutterhead and a shield blade (202) arranged on the blind area of ​​the cutterhead.

3. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 1, characterized in that: The modularly assembled propulsion frame includes support rings, which are provided in a plurality of groups. Each group of support rings is arranged along the axial direction of the entire propulsion frame.

4. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 3, characterized in that: The support ring is formed by splicing together a plurality of splicing pieces (301), wherein two splicing pieces (301) are respectively located above and below the support ring group, wherein two splicing pieces (301) are respectively located on the left and right sides of the support ring group, and the remaining splicing pieces (301) are respectively arranged at the four corners of the support ring group, and the specific shape of the splicing pieces (301) is determined according to their positions.

5. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 4, characterized in that: A plurality of axial fixing blocks (302) are radially distributed on the inner arc surface of the splicing piece (301) and fixedly connected thereto. The plurality of axial fixing blocks (302) are fixedly connected to a radial fixing block (304). The radial fixing blocks (304) are fixedly connected to radial connecting blocks (303) at both radial ends of the splicing piece (301). Two adjacent splicing pieces (301) are fixedly connected via the two radial connecting blocks (303) and bolts.

6. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 5, characterized in that: The propulsion frame further comprises a plurality of axial connecting members (305), wherein the plurality of axial connecting members (305) are used to connect two adjacent support ring groups, and two grooves are provided at the bottom of the axial connecting member (305), and the two grooves are respectively engaged with two radial fixing blocks (304) in the two support ring groups, and the axial connecting member (305) is also connected to the radial fixing block (304) by bolts.

7. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 4, characterized in that: A plurality of oil cylinders (4) fixedly connected to an axial end face of the propulsion frame are evenly distributed, and the number of the oil cylinders (4) is determined according to the area of ​​the axial end face of the splicing piece (301). The larger the area of ​​the axial end face of the splicing piece (301), the more oil cylinders (4) are installed on the splicing piece (301).

8. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 6, characterized in that: The axial connecting member (305) comprises a connecting rod (3051) and two buckles (3052), wherein the connecting rod (3051) is located between the two buckles (3052), and both buckles (3052) are rotatably connected to the connecting rod (3051), and the buckles (3052) are provided with grooves for buckling with the radial fixing block (304).

9. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 1, characterized in that: The soil pressure measurement and control module includes two sets of screw conveyors and a group of evenly distributed soil pressure sensors.

10. The equipment for super-large cross-section rectangular pipe jacking in complex environments according to claim 8, characterized in that: The guide module comprises a dual-axis inclinometer (601) mounted on a connecting rod (3051).

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