Subway shield station crossing and underground excavation station lining parallel construction technology

Abstract

The invention belongs to the field of building construction, and particularly relates to a subway shield station crossing and underground excavation station lining parallel construction technology, which introduces full-automatic hydraulic trolley secondary lining jump section construction, optimizes secondary lining trolley type selection and safety protection measures, and innovatively adopts a stepping mode of combining a rail clamping device and a thrust oil cylinder. And parallel construction of shield station crossing and underground excavation of the secondary lining of the station is realized. According to the innovation, the construction period is remarkably shortened, the resource utilization rate is increased, the safety risk is effectively reduced, the construction coordination process is simplified, and remarkable beneficial effects are brought to the field of underground tunnel and subway construction.

Description

Technical Field

[0001] The invention belongs to the field of building construction, and in particular relates to a parallel construction technology of subway shield tunneling and underground excavation station lining. Background Art

[0002] In underground tunnel and subway construction, the shield method is widely used due to its high efficiency and safety. During the excavation process, the shield machine inevitably needs to pass through the station structure that has been built or is under construction. This process is called shield passing the station. At the same time, in order to enhance the stability and durability of the station structure, the dark excavation station usually requires secondary lining (referred to as "secondary lining") construction.

[0003] Traditionally, shield tunneling and underground tunneling are carried out sequentially, that is, shield tunneling is completed first, and then the secondary lining of the station is constructed. However, this construction method has the following problems:

[0004] Long construction period: Since the shield tunneling and the secondary lining construction cannot be carried out at the same time, the entire construction period is extended, increasing the project cost and time cost.

[0005] Inadequate resource utilization: Sequential construction results in the shield machine and secondary lining construction equipment being idle at different time periods, making it impossible to fully utilize resources.

[0006] Increased safety risks: When the shield machine passes through the station structure, if it is carried out simultaneously with the secondary lining construction, the safety risks may increase due to cross-operation, such as collision between the shield machine and the secondary lining trolley.

[0007] Construction coordination is difficult: Sequential construction requires precise construction planning and coordination to ensure seamless connection between the shield machine and the secondary lining construction, which is often difficult to achieve in actual operations.

[0008] In order to solve the above problems, the industry has begun to explore the technology of parallel construction of shield tunneling and secondary lining of underground excavation stations. The parallel construction technology aims to achieve the simultaneous construction of shield tunneling and secondary lining through reasonable construction deployment and technical means, thereby shortening the construction period, improving resource utilization, reducing safety risks and simplifying construction coordination.

[0009] However, the existing parallel construction technology still has some shortcomings, such as improper selection of the secondary lining trolley leading to the inability of the shield machine to pass smoothly, insufficient safety protection measures leading to safety accidents, and unreasonable shield machine station passing methods affecting the construction progress. Therefore, a more complete, efficient and safe subway shield station passing and dark excavation station lining parallel construction technology is needed to meet actual engineering needs. Summary of the invention

[0010] In view of this, the purpose of the present invention is to provide a more efficient, safe and reliable subway shield passing station and dark excavation station lining parallel construction technology by optimizing construction steps, improving the selection of secondary lining trolleys and safety protection measures, and innovating shield machine passing station methods.

[0011] To achieve the above object, the present invention provides the following technical solution: a technology for parallel construction of subway shield tunneling and underground excavation station lining, comprising the following steps:

[0012] S1, construction of the second lining jump section with a fully automatic hydraulic trolley; according to the shield tunneling construction plan and the station line planning, the second lining construction deployment of the station main body is reasonably organized, and the second lining construction is carried out in stages at different mileages of the station;

[0013] S11, before receiving the shield, assemble and construct the secondary lining of the station main hydraulic trolley at the receiving end of the shield;

[0014] S12, when the shield machine receives the station, the hydraulic trolley of the station body is pushed to the starting section of the shield machine, and the secondary lining construction of the station body on the other side is carried out. At the same time, the shield machine receives the completed secondary lining section and pushes through the station empty;

[0015] S13: After the shield machine is pushed to the section where it interacts with the secondary lining of the station body, the hydraulic trolley of the station body is pushed across the shield machine to the section where the shield machine has been pushed through the station for secondary lining construction, while the shield machine is pushed and started in the section where the secondary lining of the station body has been completed;

[0016] S2, selection and safety protection of the secondary lining trolley: select the secondary lining trolley of the station main body that meets the passage conditions of the shield machine, and set up an anti-fall net under the working layer of the secondary lining trolley, set up protective railings and skirting boards on the edge of the trolley, and set up a shielding plate on the trolley working layer to avoid the safety risks caused by falling welding slag and falling objects from high altitude;

[0017] S3, choose the stepping method reasonably; when the shield machine passes under the second lining trolley, the rail clamp and the thrust cylinder are combined to push it through the station empty, ensuring that the shield body and the second lining trolley maintain a safe distance and avoiding safety problems in vertical space cross construction.

[0018] Optionally, during the construction of the second lining skipping section of the fully automatic hydraulic trolley, the construction of the second lining of the station main body skips the shield receiving and empty pushing construction sections to avoid cross-operation with the shield passing through the station.

[0019] Optionally, the secondary lining trolley is selected as a full-section hydraulic formwork trolley. The single secondary lining construction length is 9m, and the trolley door opening design meets the requirements for the passage of the shield machine and reserves ample space.

[0020] The specific design of the optional full-section hydraulic formwork trolley includes: steel formwork, top formwork gantry, upper longitudinal beam, portal crossbeam, portal column, lower longitudinal beam, side formwork support screw jack and lower longitudinal beam support screw jack. The material and size selection of each component meet the construction safety and efficiency requirements.

[0021] Optionally, in the step-by-step method, the shield empty pushing working face and the second lining construction working face can be reasonably divided according to the construction plan and line planning to avoid simultaneous construction in the same vertical plane.

[0022] Optionally, during the shield empty pushing process, a jacking system combining steel plates and tracks is used. Two sets of tracks are welded on each steel plate. A thrust cylinder is set on each track on both sides of the shield. The tracks are fixed to the tracks with track clamps. Before each jacking, butter is applied to the contact surface between the track and the shield bracket to reduce friction.

[0023] The beneficial effects of the present invention are:

[0024] 1) Significantly shorten the construction period: By realizing the parallel construction of shield tunneling and underground excavation of the station secondary lining, the waiting time between the two is effectively avoided, and the overall construction period is significantly shortened. This can not only speed up the progress of the project and achieve project delivery ahead of schedule, but also effectively reduce the additional costs caused by construction delays.

[0025] 2) Improve resource utilization: Parallel construction technology enables shield machines and secondary lining construction equipment to be fully utilized in the same period of time, avoiding equipment idleness and improving resource utilization. This helps reduce construction costs and improve economic benefits.

[0026] 3) Reduce safety risks: This patent effectively reduces safety risks during construction through reasonable construction deployment and technical means, such as the selection of secondary lining trolleys, safety protection measures, and innovations in shield machine passing through stations. This helps to protect the life safety and physical health of construction workers and reduce the occurrence of safety accidents.

[0027] 4) Simplified construction coordination: Parallel construction technology achieves seamless connection between shield tunneling and secondary lining construction through a clear construction plan and coordination mechanism, simplifying the construction coordination process. This helps reduce construction delays and cost increases caused by improper construction coordination and improves construction efficiency.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is the construction layout diagram before the first stage shield acceptance of the present invention;

[0031] Figure 2 This is the second stage shield tunneling station and secondary lining construction layout diagram of the present invention;

[0032] Figure 3 This is the layout diagram of the shield tunneling station and secondary lining construction in the third stage of the present invention;

[0033] Figure 4 It is a cross-sectional view of the shield machine and the secondary lining trolley of the present invention. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are 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, rather than indicating or implying 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 position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] See also Figure 1 to Figure 4This is a parallel construction technology for subway shield tunneling and underground station lining. It is applied in urban subway construction projects, where a new subway line needs to be built above an existing subway line. The new line needs to pass through a station on the existing line, and the station is undergoing secondary lining construction. In order to shorten the construction period, reduce safety risks and improve resource utilization, this method is adopted, which specifically includes the following steps:

[0038] 1. Construction preparation stage

[0039] 1.1 Conduct a detailed survey of the main structure of the station to identify the tunnel boring machine's route through the station and the secondary lining construction area.

[0040] 1.2 Based on the survey results, formulate a detailed construction plan and coordination mechanism, and clarify the responsible persons and time nodes for each construction stage.

[0041] 1.3 Prepare the materials and equipment required for construction, including full-section hydraulic formwork trolley, rail clamps, thrust cylinders, steel plate rails, etc.

[0042] 2. Construction of the second lining jump section with fully automatic hydraulic trolley

[0043] 2.1 Construction before shield receiving: Assemble and construct the secondary lining of the station main hydraulic trolley at the shield receiving end to ensure that the construction section avoids the shield receiving area.

[0044] 2.2 Construction adjustment when receiving shield: When the shield machine arrives at the receiving end, the hydraulic trolley of the station body is pushed to the starting section of the shield, and the secondary lining construction of the station body on the other side begins. At the same time, the shield machine receives the completed secondary lining section and pushes it through the station empty.

[0045] 2.3 Shield machine pushes and secondary lining are constructed simultaneously: After the shield machine pushes to the section where it interacts with the secondary lining of the station body, the hydraulic trolley will cross the shield machine and push it to the section where the push has been completed to carry out the secondary lining construction, while the shield machine will continue the push and start operation in the section where the secondary lining of the station body has been completed.

[0046] 3. Secondary lining trolley selection and safety protection

[0047] 3.1 A full-section hydraulic formwork trolley is selected as the secondary lining construction equipment. The single secondary lining construction length is 9m. The trolley door opening design meets the requirements for the passage of the shield machine and reserves sufficient space.

[0048] In this embodiment, the trolley design material selection includes the following:

[0049] Steel formwork: The steel formwork panel is made of δ=12mm steel plate; the connecting flange is made of δ=12mm steel plate; the reinforcement ribs are made of L110×70×6 unequal angle steel and 140×58×6×9.5 channel steel.

[0050] Top formwork stand: The top formwork stand columns are made of H200×200 H-shaped steel; the top formwork stand chord beams are made of H340×250 welded H-shaped steel.

[0051] Upper longitudinal beam: The upper longitudinal beam adopts H600×300 welded H-shaped steel.

[0052] Door frame crossbeam: The door frame crossbeam adopts a truss structure, the lower crossbar is made of H500×400 welded H-shaped steel, the upper crossbar is made of H700×400 welded H-shaped steel, the middle vertical bar is made of H400×200H-shaped steel, and the diagonal bar is made of H250×125H-shaped steel. The welded H-shaped steel wing plate is made of δ=12mm steel plate, and the web plate is made of δ=12mm steel plate.

[0053] Door frame column: The door frame column uses H600×400 welded H-shaped steel, and the door frame diagonal brace uses H400×200H-shaped steel and H400×200H-shaped steel. The welded H-shaped steel wing plate uses δ=12mm steel plate, and the web plate uses δ=12mm steel plate.

[0054] Lower longitudinal beam: The lower longitudinal beam is made of H800×600 welded box steel; the welded box steel wing plate is made of δ=16mm steel plate, and the web plate is made of δ=16mm steel plate.

[0055] Side mold support screw jack: side mold support screw jack uses Tr60×9 screw; side mold support screw jack support rod uses Seamless steel pipe.

[0056] Lower longitudinal beam support screw jack: The lower longitudinal beam support screw jack uses Tr80×10 screw; The lower longitudinal beam support screw jack support rod uses Seamless steel pipe.

[0057] 3.2 An anti-fall net is set under the working layer of the second lining trolley, and protective railings and skirting boards are set on the edge of the trolley. At the same time, a shielding plate is set on the working layer of the trolley to prevent welding slag from falling and falling objects from high altitude.

[0058] 4. Choose the stepping method reasonably

[0059] 4.1 When the shield machine passes through the secondary lining trolley, it is pushed through the station by combining the rail clamp and the thrust cylinder. Specifically, a jacking system consisting of steel plates and tracks is laid at the bottom of the shield machine bracket, two sets of tracks are welded on each steel plate, and a thrust cylinder is set on each track on both sides of the shield, which is fixed on the track by the rail clamp.

[0060] 4.2 Before each jacking, apply butter on the contact surface between the track and the shield bracket to reduce friction, ensure that the shield body and the secondary lining trolley maintain a safe distance, and avoid safety problems caused by cross-construction in vertical space.

[0061] 5. Monitoring and adjustment during construction

[0062] 5.1 During the construction process, a special safety monitoring team will be set up to monitor the construction site around the clock to ensure that all safety measures are effectively implemented.

[0063] 5.2 According to the actual construction situation, timely adjust the construction plan and coordination mechanism to ensure seamless connection between the shield tunneling and the secondary lining construction.

[0064] 6. Construction completion and acceptance

[0065] 6.1 After the shield machine has completely passed through the station and completed the initial operation, the secondary lining of the station body shall be fully inspected and accepted.

[0066] 6.2 Analyze and summarize the data generated during the construction process, evaluate the construction effect, and provide reference for subsequent similar projects

[0067] Through the application of this embodiment, the parallel construction of the shield tunneling station and the second lining of the underground excavation station was successfully realized, which effectively shortened the construction period, improved resource utilization and reduced safety risks. At the same time, this embodiment also verified the feasibility and effectiveness of this patent technology.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. Parallel construction technology of subway shield tunneling and underground excavation station lining, characterized by: The following steps are involved: S1, construction of the second lining jump section with a fully automatic hydraulic trolley; according to the shield tunneling construction plan and the station line planning, the second lining construction deployment of the station main body is reasonably organized, and the second lining construction is carried out in stages at different mileages of the station; S11, before receiving the shield, assemble and construct the secondary lining of the station main hydraulic trolley at the receiving end of the shield; S12, when the shield machine receives the station, the hydraulic trolley of the station body is pushed to the starting section of the shield machine, and the secondary lining construction of the station body on the other side is carried out. At the same time, the shield machine receives the completed secondary lining section and pushes through the station empty; S13: After the shield machine is pushed to the section where it interacts with the secondary lining of the station body, the hydraulic trolley of the station body is pushed across the shield machine to the section where the shield machine has been pushed through the station for secondary lining construction, while the shield machine is pushed and started in the section where the secondary lining of the station body has been completed; S2, selection and safety protection of the secondary lining trolley: select the secondary lining trolley of the station main body that meets the passage conditions of the shield machine, and set up an anti-fall net under the working layer of the secondary lining trolley, set up protective railings and skirting boards on the edge of the trolley, and set up a shielding plate on the trolley working layer to avoid the safety risks caused by falling welding slag and falling objects from high altitude; S3, choose the stepping method reasonably; when the shield machine passes under the second lining trolley, the rail clamp and the thrust cylinder are combined to push it through the station empty, ensuring that the shield body and the second lining trolley maintain a safe distance and avoiding safety problems in vertical space cross construction.

2. The parallel construction technology of subway shield tunneling and underground excavation station lining according to claim 1 is characterized by: During the construction of the second lining skipping section of the fully automatic hydraulic trolley, the construction of the second lining of the station main body skips the shield receiving and empty pushing construction sections to avoid cross-operation with the shield passing through the station.

3. The parallel construction technology of subway shield tunneling and underground excavation station lining according to claim 1 is characterized by: The secondary lining trolley is a full-section hydraulic formwork trolley. The single secondary lining construction length is 9m, and the trolley door opening design meets the requirements for the passage of the shield machine and reserves ample space.

4. The parallel construction technology of subway shield tunneling and underground station lining according to claim 3 is characterized by: The specific design of the full-section hydraulic formwork trolley includes: steel formwork, top formwork gantry, upper longitudinal beam, portal crossbeam, portal column, lower longitudinal beam, side formwork support screw jack and lower longitudinal beam support screw jack. The material and size selection of each component meet the construction safety and efficiency requirements.

5. The parallel construction technology of subway shield tunneling and underground excavation station lining according to claim 1 is characterized by: In the reasonable selection of step-by-step method, the shield empty pushing working face and the second lining construction working face are reasonably divided according to the construction plan and line planning to avoid simultaneous construction in the same vertical plane.

6. The parallel construction technology of subway shield tunneling and underground excavation station lining according to claim 1 is characterized by: During the shield tunneling process, a jacking system combining steel plates and tracks is used. Two sets of tracks are welded on each steel plate. A thrust cylinder is installed on each track on both sides of the shield. The tracks are fixed to the tracks with track clamps. Before each jacking, butter is applied to the contact surface between the track and the shield bracket to reduce friction.

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