Urban rail station lower box structure and shield receiving construction method

Abstract

The invention relates to the field of subway construction, and discloses a box body structure below an urban rail station and a shield receiving construction method.The box body structure comprises a cuboid-shaped box body arranged below an existing rail structure, and the box body comprises a top plate, a bottom plate, two side walls and two end walls; the lower part of the end wall of the box body is provided with an entrance and a ventilation opening for people to enter and exit. The construction method comprises the following steps: S1, carrying out environment and geological exploration, and determining a construction position; s2, a box body structure is constructed; s3, the box body structure is reinforced; s4, tunnel portal breaking is carried out; s5, the shield tunneling machine enters the box body structure; s6, soil around the shield tunneling machine is reinforced; s7, the shield tunneling machine is maintained and overhauled; and S8, dismantling the box body structure. The box body structure can serve as a temporary structure for shield receiving, the step that a large amount of soil is excavated and reinforced in traditional shield receiving is avoided, the construction process is simplified, and the safety of shield receiving construction is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of subway construction, and in particular to a box structure below an urban rail station and a shield receiving construction method. Background Art

[0002] When constructing under the operating line in an existing station, a series of challenges and difficulties are usually encountered. Among them, shield reception is an important link, which requires the stability of the underground structure and the smooth progress of construction under the premise of ensuring the safety of the existing station operation.

[0003] Among the existing shield receiving methods, a common practice is to reinforce the receiving end when the shield arrives to ensure the stability of the soil when the tunnel door is broken and to prevent groundwater from flowing into the receiving well. However, for some special geological conditions and environmental factors, such as the presence of communication pipelines or water pipes invading the end reinforcement area, this reinforcement method may not fully meet the construction requirements. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a box structure and shield receiving construction method under an urban rail station. The method combines partial high-pressure rotary jet piles to form a reinforced body, and at the same time, a reinforced concrete box is constructed in the receiving shaft when the shield arrives at the receiving shaft for overall receiving, forming a receiving mode of a semi-reinforced solid and semi-reinforced concrete box.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a box structure below an urban rail station, comprising a rectangular box arranged below an existing rail structure, the box comprising a top plate, a bottom plate, two side walls and two end walls, wherein the lower part of the end wall of the box is provided with an entrance and exit and a vent for people to enter and exit.

[0006] Preferably, a waterproof layer is provided at the joint between the interior of the box structure and the existing structure.

[0007] Preferably, a safety door is provided next to the entrance and exit at the lower part of the end wall of the box structure, so as to quickly close the entrance and exit in an emergency.

[0008] Preferably, reinforcing ribs are provided on the inner sides of both side walls of the box structure to improve the overall stability of the box structure.

[0009] The present invention provides a shield receiving construction method using the box structure, comprising the following steps: S1. Conduct environmental and geological surveys to determine the construction location; S2. Construct box structure; S3. Strengthen the box structure; S4, breaking down the cave door; S5, the shield machine enters the box structure; S6. Reinforce the soil around the shield machine; S7. Maintain and overhaul the shield machine; S8. Dismantle the box structure.

[0010] Preferably, the environmental and geological survey includes an assessment of soil quality, groundwater level and surrounding building structures.

[0011] Preferably, the step of constructing the box structure includes using precast concrete panels or cast-in-situ concrete to construct the box structure.

[0012] Preferably, the step of reinforcing the box structure includes using reinforced concrete to reinforce the walls and bottom plate of the box structure.

[0013] Preferably, the portal breaking step includes using mechanical excavation or blasting technology to create a passage for the shield machine to enter and exit.

[0014] Preferably, the step of maintaining and overhauling the shield machine includes inspecting and maintaining the cutter head, propulsion system and hydraulic system of the shield machine.

[0015] The present invention provides a box structure under an urban rail station and a shield receiving construction method. It has the following beneficial effects: 1. The present invention uses a part of high-pressure jet grouting piles to form a reinforcement body and a reinforced concrete box to receive the reinforcement body, which can effectively prevent groundwater, soil and sand from flowing into the shield machine and the gap around the tunnel door, ensuring the stability of the soil when the tunnel door is broken, and at the same time preventing adverse effects on surrounding surface structures and underground pipelines. In addition, the box structure can be customized according to actual conditions and can adapt to various complex geological conditions and construction environments.

[0016] 2. The present invention effectively solves the problem of communication pipelines or water pipes invading the end reinforcement area, reduces the adverse effects on surrounding buildings and underground pipelines, and achieves the stability of the box structure under the operating line in the existing station and the smooth progress of the construction.

[0017] 3. The box structure of the present invention can protect the operating lines of existing stations and avoid interference of shield construction on the operation of existing stations.

[0018] 4. The box structure of the present invention can be used as a temporary structure for shield receiving, avoiding the steps of a large amount of excavation and soil reinforcement required for traditional shield receiving, simplifying the construction process, and enhancing the safety of shield receiving construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Among the existing shield receiving methods, a common practice is to reinforce the receiving end when the shield arrives to ensure the stability of the soil when the tunnel door is broken and to prevent groundwater from flowing into the receiving well. However, for some special geological conditions and environmental factors, such as the presence of communication pipelines or water pipes invading the end reinforcement area, this reinforcement method may not fully meet the construction requirements.

[0022] In order to solve the above problems, the present invention proposes a new shield receiving construction method, which combines partial high-pressure rotary jet piles to form a reinforced body, and at the same time, a reinforced concrete box is constructed in the receiving shaft when the shield arrives at the receiving shaft for overall receiving, forming a receiving mode of a semi-reinforced body and a semi-reinforced concrete box.

[0023] The box structure provided by the embodiment of the present invention effectively solves the problem of communication pipelines or water pipes invading the end reinforcement area, reduces the adverse effects on surrounding buildings and underground pipelines, and achieves the stability of the box structure under the operating line in an existing station and the smooth progress of construction.

[0024] The box structure includes: Floor: The floor is laid under the operating line as the foundation of the box structure.

[0025] Box wall: extends upward from at least two opposite sides of the bottom plate to form the side structure of the box.

[0026] Roof: Covers the top of the box wall and forms the top of the box structure.

[0027] Ventilation holes: Opened on the top plate and / or the box wall to promote air circulation inside and outside the box to ensure the safety and comfort of construction workers.

[0028] Lighting equipment: installed inside the box to provide lighting at night or in low light conditions to ensure smooth construction work.

[0029] Electrical control system: connect various lighting devices to control their switch status to meet the lighting needs of the construction site.

[0030] In the above-mentioned box structure, the bottom plate, the box wall and the top plate can be made of concrete, steel, synthetic materials, etc. to meet the requirements of structural strength and durability. Ventilation holes can be opened on the top plate and / or the box wall to allow air to circulate inside and outside the box, which is beneficial to ventilation and air exchange at the construction site. Lighting equipment can be installed inside the box to provide lighting at night or in low light conditions, ensuring the safety of construction operations. The electrical control system can be connected to each lighting device to control its on / off state.

[0031] The embodiment of the present invention also provides a construction method of the box structure, comprising the following steps: 1) Lay the base plate under the operating line in the existing station to ensure that the box structure has a solid foundation support.

[0032] 2) Extending upward from at least two opposite sides of the bottom plate to construct a box wall, thereby forming a side structure of the box.

[0033] 3) Cover the top of the box wall with a roof plate to form the top of the box structure.

[0034] 4) Open ventilation holes on the top plate and / or box wall to ensure air circulation at the construction site.

[0035] 5) Install lighting equipment inside the box to provide lighting support for construction at night or in low light conditions.

[0036] 6) Connect the electrical control system to control the on / off status of the lighting equipment to ensure that the lighting needs of the construction site are met.

[0037] This new shield receiving construction method combines the reinforcement body with the reinforced concrete box, effectively solving the problem of communication pipelines or water pipes invading the end reinforcement area, reducing the adverse impact on surrounding buildings and underground pipelines, and achieving the stability of the box structure under the operating line in the existing station and the smooth progress of construction. The advantage of this method is that it provides a more flexible and reliable solution under special geological conditions and environmental factors, ensuring the safety and smooth progress of construction.

[0038] As an implementation mode of the present invention, a waterproof layer is provided at the joint between the interior of the box structure and the existing structure.

[0039] Specifically, such a design can effectively prevent groundwater or surface water from invading the interior of the box structure, protect the existing structure and provide a good working environment. The waterproof layer can be set up using various waterproof materials and technologies, such as waterproof coatings, waterproof membranes, grouting, etc. During the construction process, special attention should be paid to ensuring the integrity and sealing of the waterproof layer to ensure its waterproof effect.

[0040] As an implementation mode of the present invention, a safety door is provided next to the entrance and exit at the lower part of the end wall of the box structure, so as to quickly close the entrance and exit in an emergency.

[0041] Specifically, setting up a safety door next to the entrance and exit at the lower part of the end wall of the box structure is a very important design feature, especially in an emergency, the entrance and exit can be quickly closed to ensure the safety of personnel and facilities. Such a design can quickly respond to emergencies when necessary and improve the efficiency of emergency response in emergency situations.

[0042] The implementation of the safety door includes but is not limited to the following aspects: Design features of safety doors: Size and location: Describe the specific location and size of the safety door relative to the entrance and exit at the bottom of the end wall of the box structure, as well as its relationship with the surrounding environment.

[0043] Structure and materials: Describe the structural features of the safety door and the materials used to ensure it has sufficient strength and sealing.

[0044] Control and operation: Describe how the safety door is controlled, such as manual opening or automatic opening, and describe its ease of operation and reliability.

[0045] Emergency closure function: Quick response: describes the function of the safety door to quickly start and close the entrance and exit in an emergency, as well as the corresponding response time.

[0046] Sealing effect: describes the sealing performance of the safety door when it is closed to ensure that the risk area can be effectively isolated in an emergency.

[0047] Emergency drills and maintenance: Emergency Drills: Propose emergency drills for safety doors to ensure that relevant personnel understand how to operate the safety doors and the response procedures in emergency situations.

[0048] Maintenance: Describe the regular maintenance schedule for the safety door to ensure its reliability and stability in emergency situations.

[0049] As an implementation mode of the present invention, reinforcing ribs are arranged on the inner sides of both side walls of the box structure to improve the overall stability of the box structure.

[0050] Specifically, the provision of reinforcement ribs on the inner side of the two side walls of the box structure is a very important design feature, which can effectively improve the overall stability of the box structure. The provision of such reinforcement ribs can increase the bearing capacity of the structure, reduce structural deformation, and improve seismic performance, thereby ensuring the safety and reliability of the structure during construction and use.

[0051] The implementation methods of the reinforcement bar include but are not limited to the following aspects: Position and arrangement of reinforcement bars: Internal setting: describes the specific position and arrangement of the reinforcement ribs relative to the inner sides of the two side walls of the box structure, as well as their relationship with other components of the box structure.

[0052] Arrangement density: describes the number, spacing and distribution pattern of the reinforcement bars to ensure their reinforcement effect on the structure.

[0053] Structure and materials of reinforcement bars: Material selection: Describe the material type and performance requirements used for reinforcement, such as steel bars, composite materials, etc.

[0054] Sectional form: Describe the section form and size of the reinforcement bar to ensure that it has sufficient bearing capacity and stiffness.

[0055] Increased overall stability: Structural effect: Explain the mechanism of action of the reinforcement bars on the overall stability of the box structure, as well as its effect in reducing structural deformation and improving seismic performance.

[0056] Structural optimization: It means that by setting up reinforcement bars, the overall stability of the box structure has been optimized and improved, thereby improving its engineering safety and reliability.

[0057] Please see attached Figure 1 The embodiment of the present invention provides a shield receiving construction method using the above-mentioned box structure, comprising the following steps: S1. Conduct environmental and geological surveys to determine the construction location: When conducting environmental and geological surveys, a professional geological survey team will first conduct a detailed survey of the geological conditions at the construction site. The survey content includes geological stratification, groundwater conditions, underground pipelines, etc. The survey team will use geological survey equipment, such as drilling rigs and measuring instruments, to conduct detailed measurements and analysis of underground conditions. The survey results will be used to determine the design and construction plans of the box structure.

[0058] S2. Construction of box structure: After determining the construction location, the construction team will carry out the construction of the box structure according to the design plan. The construction process includes ground excavation, box formwork installation, concrete pouring and other steps. The construction team will use the corresponding construction equipment and technology according to the design requirements to ensure the accuracy and stability of the box structure.

[0059] S3. Strengthen the box structure: After the basic construction of the box structure is completed, it will be reinforced. The specific methods of reinforcement include setting reinforcement bars, grouting reinforcement, etc., to improve the overall stability and seismic performance of the box structure.

[0060] S4. Break down the cave door: After the box structure is reinforced, the construction team will break the door of the box structure to allow the shield machine to enter. This step involves the use of cutting equipment or blasting to ensure the accuracy and safety of the breaking.

[0061] S5. The shield machine enters the box structure: The shield machine will be introduced into the box structure and enter the construction area through the tunnel door. The construction team will ensure that the shield machine can smoothly enter the box structure according to the size of the shield machine and construction requirements.

[0062] S6. Reinforce the soil around the shield machine: Once the shield machine enters the box structure, the construction team will reinforce the soil around the shield machine to ensure safety and stability during the shield construction process.

[0063] S7. Maintain and overhaul the shield machine: During the shield construction process, the construction team will regularly maintain and inspect the shield machine to ensure the normal operation of the equipment and the smooth progress of the construction.

[0064] S8. Dismantle the box structure: After the shield construction is completed, the construction team will dismantle the box structure. The dismantling process will be carried out according to the design requirements and safety regulations to ensure safety and cleanliness after the construction is completed.

[0065] As an embodiment of the present invention, the environmental and geological survey includes an assessment of soil quality, groundwater level and surrounding building structures.

[0066] Specifically, when conducting environmental and geological surveys, the following methods can be used to evaluate soil quality, groundwater levels, and surrounding building structures: Specific steps and description of soil quality assessment: Soil quality assessment involves evaluating the physical and engineering properties of the subsurface soil. This can be done by taking soil samples and performing laboratory tests.

[0067] Soil sampling can be done by drilling or excavation to collect soil samples at different depths. Soil samples are subjected to particle analysis, moisture content testing, compression testing and other experiments to obtain soil density, bearing capacity, compressibility and other parameters.

[0068] By evaluating the soil properties, the soil conditions that may be encountered during shield construction, such as soft soil, hard soil, rock, etc., can be determined, thus providing a basis for the selection of shield machines and the determination of construction parameters.

[0069] Specific steps and description of groundwater level assessment: The assessment of groundwater levels can be carried out through groundwater observation wells or hydrogeological surveys. A professional team can be arranged to monitor and measure the groundwater level, record the depth, changes and water quality parameters of the groundwater level.

[0070] Through the assessment of the groundwater level, the groundwater conditions that may be encountered during shield construction can be determined, such as groundwater influx, water pressure conditions, etc., providing a basis for groundwater control and anti-seepage design.

[0071] Specific steps and description of surrounding building structure assessment: The assessment of surrounding building structures may include the investigation of underground pipelines, the structural stability assessment of surrounding buildings, etc.

[0072] The location and direction of underground pipelines can be obtained by underground radar survey, geological radar survey, etc. The structural stability of surrounding buildings is evaluated, including considerations of the building's foundation type, underground structure, and earthquake safety.

[0073] Through the assessment of surrounding building structures, the impact of shield construction on surrounding buildings can be determined, and corresponding protection measures and preventive measures can be formulated to ensure construction safety and the stability of surrounding buildings.

[0074] As an embodiment of the present invention, the step of constructing the box structure includes constructing the box structure using precast concrete panels or cast-in-situ concrete.

[0075] Specifically, the steps of constructing the box structure include the following key stages: Box structure design: Based on the evaluation results of environmental and geological surveys and engineering requirements, design a box structure solution that is suitable for the underground engineering construction environment, including design parameters such as structural dimensions, load-bearing capacity, and sealing performance.

[0076] Material preparation: Prepare the required concrete materials and engineering equipment according to the design plan. If you choose to use precast concrete slabs, you need to prepare the production equipment and raw materials of precast concrete slabs; if you choose to pour concrete on site, you need to prepare concrete raw materials, mixing equipment, etc.

[0077] Box structure installation: If precast concrete panels are used, install them according to the design requirements and assemble them into a box structure. Ensure that the connections between the precast concrete panels are tight, while considering the sealing performance and structural stability.

[0078] If you choose to cast concrete on site, set up the formwork and pour and shape the concrete according to the design requirements. Ensure that the quality and density of the concrete meet the design requirements.

[0079] Structural connection and sealing: Connect and seal the various parts of the box structure to ensure the sealing and stability of the overall structure. This includes using sealing materials to treat the joints, and reinforcing and fixing the structural connection parts.

[0080] Structural acceptance and monitoring: Acceptance and monitoring of the completed box structure to ensure that the structure meets the design requirements and has sufficient load-bearing capacity and sealing performance. At the same time, long-term monitoring and evaluation of the structure is carried out to ensure the safety and reliability of the structure.

[0081] As an embodiment of the present invention, the step of reinforcing the box structure includes using reinforced concrete to reinforce the walls and the bottom plate of the box structure.

[0082] The specific steps are as follows: Wall reinforcement: a. Reinforcement arrangement: According to the design requirements, a reinforcement skeleton is set up in the wall part of the box structure, and transverse and longitudinal reinforcements are arranged to enhance the bearing capacity and tensile performance of the wall.

[0083] b. Pouring concrete: After the reinforcement is arranged, pour the concrete to ensure that the concrete is fully filled and tightly combined with the reinforcement to form a reinforced concrete wall structure.

[0084] Bottom plate reinforcement: a. Reinforcement arrangement: A reinforcement skeleton is set on the bottom plate of the box structure, and transverse and longitudinal reinforcements are arranged to enhance the bearing capacity and bending resistance of the bottom plate.

[0085] b. Pouring concrete: After the reinforcement is arranged, pour the concrete to ensure that the concrete is fully filled and tightly combined with the reinforcement to form a reinforced concrete base plate structure.

[0086] Through the above reinforcement steps, the walls and floor of the box structure have been effectively reinforced, improving the overall stability and bearing capacity of the structure. This reinforcement method is suitable for underground engineering construction scenarios that need to improve the strength and stability of the box structure, and has good engineering application value.

[0087] As an embodiment of the present invention, the portal breaking step includes using mechanical excavation or blasting technology to create a passage for the shield machine to enter and exit.

[0088] The specific steps are as follows: Mechanical excavation: a. Determine the excavation location: Determine the location and size of the excavation channel based on the entry and exit position of the shield machine and project requirements.

[0089] b. Mechanical equipment preparation: Prepare appropriate mechanical excavation equipment, such as excavators, drilling rigs, etc., to ensure accurate excavation operations can be carried out.

[0090] c. Excavation work: Use mechanical equipment to carry out excavation work, gradually dig out underground rock, soil or other materials, and form a passage for the shield machine to enter and exit.

[0091] Blasting technology: a. Safety planning: Carry out detailed safety planning for blasting operations and obtain relevant blasting operation permits.

[0092] b. Drilling arrangement: Drill holes at designated locations and place blasting charges according to design requirements.

[0093] c. Blasting operation: By detonating the blasting charges in the borehole, underground rock or other materials are broken and removed to form a passage for the shield machine to enter and exit.

[0094] Through the above steps of breaking the tunnel door, a channel for the shield machine to enter and exit can be effectively created, providing the necessary passage conditions for shield construction. This excavation or blasting technology is suitable for scenes where the shield machine entry and exit channel needs to be excavated in underground projects, and has good engineering application value.

[0095] As an implementation mode of the present invention, the steps of maintaining and overhauling the shield machine include inspecting and maintaining the cutter head, propulsion system and hydraulic system of the shield machine.

[0096] The specific steps are as follows: Cutter inspection and maintenance: a. Tool wear inspection: Regularly inspect the tools on the shield machine cutterhead to ensure that the tools are not severely worn or damaged.

[0097] b. Tool replacement: If the tool is found to be severely worn or damaged, replace it in time to ensure the normal working condition of the cutter disc.

[0098] Propulsion system inspection and maintenance: a. Propulsion device inspection: Check the propulsion system of the shield machine, including hydraulic cylinders, propulsion shield and other components, to ensure the normal operation of the propulsion system.

[0099] b. Lubrication and Adjustment: Inspect and maintain the lubrication device of the propulsion system, and perform lubrication and adjustments in a timely manner to ensure the stability and reliability of the propulsion system.

[0100] Hydraulic system inspection and maintenance: a. Hydraulic pipeline inspection: Check the hydraulic pipeline of the shield machine to eliminate problems such as oil leakage and looseness, and ensure the sealing and stability of the hydraulic system.

[0101] b. Hydraulic oil replacement: Regularly replace the hydraulic oil in the hydraulic system to ensure the working performance and life of the hydraulic system.

[0102] Through the above inspection and maintenance of the shield machine's cutter head, propulsion system and hydraulic system, the normal operation and construction efficiency of the shield machine can be ensured, the service life of the equipment can be extended, the maintenance cost can be reduced, and the safety and stability of the engineering construction can be improved. This maintenance and overhaul procedure is suitable for underground engineering construction scenarios where regular maintenance of the shield machine is required, and has good engineering application value. Example:

[0103] The present invention proposes a box structure and shield receiving construction method used under the operating line in an existing station. The box structure is composed of a semi-solid semi-reinforced concrete box. The advantage of this box structure is that it can be customized according to actual conditions and can adapt to various complex geological conditions and construction environments.

[0104] Specifically, the construction method includes the following steps: S1. Construct some high-pressure jet grouting piles under the operating line in the existing station to form a reinforcement body. First, survey and measure the operating line in the station to determine the location and depth of the jet grouting piles. Then, use professional jet grouting equipment to construct and form a reinforcement body.

[0105] S2. When the end reaches the receiving well, a reinforced concrete box is constructed for overall reception. According to the pre-designed plan, a reinforced concrete box is made and installed in the hoisting well. The shape and size of the box should be customized according to the actual situation to ensure that the shield machine can be received smoothly.

[0106] S3. Use a special receiving device to receive the shield machine and hoist it out of the well. On the basis of the reinforced concrete box, use a special receiving device to receive the shield machine and hoist it out of the well. During this process, you need to pay attention to safety to prevent accidents.

[0107] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A box structure below an urban rail station, characterized in that: It comprises a rectangular box body arranged below the existing track structure, the box body comprises a top plate, a bottom plate, two side walls and two end walls, wherein the lower part of the end wall of the box body is provided with an entrance and an exit and a ventilating hole for people to enter and exit.

2. The box structure below the urban rail station according to claim 1, characterized in that: A waterproof layer is arranged at the joint between the interior of the box structure and the existing structure.

3. The box structure below the urban rail station according to claim 1, characterized in that: A safety door is arranged beside the entrance and exit at the lower part of the end wall of the box structure, which is used to quickly close the entrance and exit in an emergency.

4. The box structure below the urban rail station according to claim 1, characterized in that: Reinforcement ribs are arranged on the inner sides of the two side walls of the box structure to improve the overall stability of the box structure.

5. A shield receiving construction method using the box structure according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Conduct environmental and geological surveys to determine the construction location; S2. Construct the box structure; S3. Strengthen the box structure; S4, breaking down the cave door; S5, the shield machine enters the box structure; S6. Reinforce the soil around the shield machine; S7. Maintain and overhaul the shield machine; S8. Dismantle the box structure.

6. The shield receiving construction method according to claim 5, characterized in that: The environmental and geological survey includes an assessment of soil quality, groundwater levels and surrounding building structures.

7. The shield receiving construction method according to claim 5, characterized in that: The step of constructing the box structure includes constructing the box structure using precast concrete panels or cast-in-situ concrete.

8. The shield receiving construction method according to claim 5, characterized in that: The step of reinforcing the box structure includes using reinforced concrete to reinforce the walls and bottom plate of the box structure.

9. The shield receiving construction method according to claim 5, characterized in that: The portal demolition step includes using mechanical excavation or blasting techniques to create a passage for the shield machine to enter and exit.

10. The shield receiving construction method according to claim 5, characterized in that: The steps of maintaining and overhauling the shield machine include inspecting and maintaining the cutter head, propulsion system and hydraulic system of the shield machine.

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