Rail-cum-road immersed tube tunnel uneven settlement active control device and construction method

Abstract

The application relates to the technical field of foundation construction, and particularly provides a highway-railway dual-purpose immersed tube tunnel uneven settlement active control device and a construction method, which comprises a data acquisition module, a data analysis and decision module and a settlement active adjustment module, the data acquisition module comprises a DAU data acquisition box, a three-way displacement meter, a pressure box and a data transmission line, the data analysis and decision module comprises a data preprocessing and control server, a database server, a Web server and a data early warning and evaluation server, can access big data through an active settlement control center switch and realize artificial intelligence autonomous decision control, and the settlement active adjustment module comprises a jacking module and a grouting module. The application can realize active fine control of the posture of an immersed tube segment, and solves the problem of uneven settlement in traditional passive foundation construction quality control.

Description

Technical Field

[0001] This invention relates to the field of basic construction technology, and in particular to an active control device and construction method for uneven settlement of immersed tunnels used for both road and rail. Background Technology

[0002] With my country's rapid economic development in recent years, cross-sea and cross-river passage resources have become increasingly scarce. The combined construction of municipal roads or highways with railways or rail transit is becoming a trend as a model of intensive resource utilization. Compared to traditional immersed tunnels, dual-purpose (road and rail) immersed tunnels require extremely high precision in settlement control. Currently, only two dual-purpose immersed tunnels have been completed in China, both of which have experienced varying degrees of settlement exceeding limits, leading to speed restrictions on railways or rail transit and seriously affecting the normal operation of the lines.

[0003] The main reason for uneven settlement in immersed tunnels is the difficulty in controlling the quality of underwater construction of the tunnel foundation. Currently, the main methods for treating immersed tunnel foundations are post-laying sand-filled foundations and pre-laying crushed stone foundations. Both methods involve underwater construction without visibility, and are greatly affected by uncontrollable factors such as water flow velocity, materials, machinery, and the skill level of the workers. This makes quality control extremely difficult, and post-construction repairs are also very challenging. While there has been considerable research on immersed tunnel foundation treatment methods in China, the actual construction results deviate significantly from theoretical research. Therefore, addressing uneven settlement in dual-purpose (road and rail) immersed tunnels solely through foundation construction quality control presents significant practical difficulties. Summary of the Invention

[0004] To address the challenges of high precision requirements and difficulty in controlling uneven settlement in dual-purpose immersed tunnels for both road and rail, this invention provides an active control device and construction method for uneven settlement in dual-purpose immersed tunnels for both road and rail.

[0005] The technical solution adopted by this invention to solve its technical problem is: an active control device and construction method for uneven settlement of immersed tunnels for both road and rail use, including a data acquisition module, a data analysis and decision-making module, and an active settlement adjustment module. The data acquisition module includes a DAU data acquisition box, a three-dimensional displacement meter, a pressure box, and a data transmission line. The data analysis and decision-making module includes a data preprocessing and control server, a database server, a web server, and a data early warning and evaluation server. The data preprocessing and control server, the database server, the web server, and the data early warning and evaluation server can all access big data through the active settlement control center switch and achieve artificial intelligence autonomous decision-making and control. The active settlement adjustment module includes a jacking module and a grouting module, which are integrated in the same device. The data acquisition module collects the settlement data of the immersed tunnel sections in real time, and the data analysis and decision-making module calculates and generates control commands to dynamically adjust the jacking torque and stroke of the jacking module. After the settlement of the immersed tunnel sections is adjusted to meet the predetermined target, the grouting module completes the grouting operation.

[0006] Preferably, the DAU data acquisition box is installed inside the side wall or the central partition wall. The DAU data acquisition box mainly includes a waterproof chassis, a power conversion module, a signal acquisition module, a storage module, and a communication module. The triaxial displacement gauge and the pressure box are respectively installed inside the immersed tube section and at the bottom of the tube. The data collected by the triaxial displacement gauge and the pressure box are transmitted to the data analysis and decision module through the DAU data acquisition box. The data analysis and decision module sends control commands to the settlement active adjustment module through the data transmission line.

[0007] Preferably, the settlement active adjustment module is integrally cast with the immersed tube section during the prefabrication of the immersed tube section using spiral steel bars.

[0008] Preferably, the settlement active adjustment module is isolated from the external river environment by a W-shaped rubber waterstop. The W-shaped rubber waterstop is a stretchable and flexible structure used for stretching and stopping water during jacking operations.

[0009] Preferably, the settlement active adjustment module has a built-in retractable flexible grouting pipe, which is connected to a grouting flange through a grouting pipeline. The grouting flange is externally connected to a grouting device, thus forming a grouting module.

[0010] Preferably, the settlement active adjustment module further includes a thrust rear end cover, a thrust front end cover, an outer steel cylinder, a telescopic piston, and a settlement adjustment support. The thrust rear end cover and the thrust front end cover are respectively installed at both ends of the outer steel cylinder. The thrust rear end cover and the thrust front end cover are provided with enlarged ribs. The two ends of the telescopic piston are respectively installed on the thrust rear end cover and the settlement adjustment support. The W-shaped rubber waterstop is sleeved on the outside of the telescopic piston. The telescopic piston is connected to the inside of the outer steel cylinder and is hydraulically driven by the inside of the outer steel cylinder.

[0011] Preferably, the thrust front end cover is also equipped with a grouting anti-blowout device, the retractable flexible grouting pipe is built into the interior of the retractable piston, and the top end of the retractable flexible grouting pipe is connected to the grouting anti-blowout device.

[0012] Preferably, the pressure box is located at the bottom of the settlement adjustment support.

[0013] The construction method for active control of uneven settlement in a dual-purpose (railway and highway) immersed tunnel includes the aforementioned active control device for uneven settlement in such tunnels, and further includes the following steps: S1. After the immersed tunnel sections are laid and connected, the displacement and bottom pressure of the tunnel sections are monitored in real time through a data acquisition module, and the attitude of the tunnel sections is also monitored in real time; S2. The data analysis and decision-making module calculates and analyzes the data collected by the data acquisition module. If the analysis result determines that the data exceeds the safety threshold, an early warning is issued and a feasible disposal plan is provided. The disposal plan includes the jacking torque and travel distance, the grouting pressure, and the grouting volume; S3. Based on the jacking torque and travel distance determined by the disposal plan... S4. After the pipe section is lifted, the data analysis and decision module calculates the void volume at the bottom of the pipe and provides suggested grouting pressure and grouting volume. S5. The grouting module is started. During the grouting process, the pipe section posture is monitored in real time by the data acquisition module, and the grouting pressure and grouting volume are dynamically calculated, analyzed and adjusted by the data analysis and decision module. S6. The immersed pipe foundation is scanned using a multi-wavelength non-destructive testing method. If the scan results show that there are no voids in the immersed pipe foundation, the uneven settlement treatment is completed. If voids are found, a second grouting reinforcement treatment is carried out until the immersed pipe foundation is completely compacted.

[0014] The beneficial effects of this invention are, firstly, that it integrates the three major modules of data acquisition, data analysis and decision-making, and settlement active adjustment into a complete set of non-uniform settlement active control system, thereby realizing active and precise control of the attitude of the immersed tunnel segment and solving the problem of non-uniform settlement that is traditionally controlled by passively relying on the construction quality of the immersed tunnel foundation.

[0015] Secondly, the data acquisition module, data analysis and decision-making module, and settlement active adjustment module can achieve fully automatic and precise micro-autonomous control of settlement, avoiding errors caused by manual handling. Compared with the uncontrollability of direct bottom hole grouting, this application can achieve precise settlement control of pipe sections. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the optimal embodiment of the active control device for uneven settlement of immersed tunnels for both road and rail transport according to the present invention.

[0018] Figure 2 This is a schematic diagram of the overall structure of the active control device for uneven settlement of immersed tunnels for both road and rail transport according to the present invention.

[0019] Figure 3 This is a schematic diagram of the retractable flexible grouting pipe of the active control device for uneven settlement of immersed tunnel for both road and rail transport according to the present invention.

[0020] Figure 4 This is a schematic diagram of the grouting and blowout prevention device of the active control device for uneven settlement of immersed tunnel for both road and rail transport according to the present invention.

[0021] Attached reference numerals: 1. DAU data acquisition box; 2. Triaxial displacement gauge; 3. Pressure box; 4. Data transmission line; 5. Settlement active adjustment module; 6. Grouting flange; 7. Grouting pipeline; 8. Spiral reinforcement; 9. Telescopic flexible grouting pipe; 10. W-type rubber waterstop; 11. Settlement adjustment support; 12. Thrust rear end cover; 13. Thrust front end cover; 14. Outer steel cylinder; 15. Grouting blowout prevention device; 16. Telescopic piston; 17. Submerged pipe foundation; 18. Submerged pipe section. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 4 As shown, this invention provides an embodiment of an active control device and construction method for uneven settlement of immersed tunnels used for both road and rail transport. It includes a data acquisition module, a data analysis and decision-making module, and an active settlement adjustment module 5. The data acquisition module includes a DAU data acquisition box 1, a three-dimensional displacement meter 2, a pressure box 3, and a data transmission line 4. It can achieve autonomous real-time active control from "identification-analysis-implementation" in three integrated aspects to address the uneven settlement problem of tunnel segments used for both road and rail transport during the construction and operation periods.

[0025] The data analysis and decision-making module includes a data preprocessing and control server, a database server, a web server, and a data early warning and evaluation server. All of these servers can access big data through the active settlement control center switch and achieve autonomous decision-making and control using artificial intelligence.

[0026] The settlement active adjustment module 5 includes a jacking module and a grouting module, which are integrated in the same device. The data acquisition module collects the settlement data of the immersed tube section 18 in real time, and the data analysis and decision module calculates and generates control commands to dynamically adjust the jacking torque and stroke of the jacking module. After the settlement of the immersed tube section 18 is adjusted to meet the predetermined target, the grouting operation is completed through the grouting module.

[0027] The data analysis and decision-making module integrates a three-dimensional structural calculation model of the tunnel as a whole and a tunnel health assessment model. By inputting the collected monitoring data such as settlement and earth pressure into the three-dimensional structural calculation model of the tunnel as a whole, the overall stress state of the tunnel is calculated in real time. The tunnel monitoring and assessment model assesses the health status of the tunnel based on the calculation results. If it is determined that the tunnel is in an unsafe state, it calculates and determines the optimal parameters such as the bottom jacking range, jacking force, grouting range, grouting pressure and grouting volume, and generates control instructions.

[0028] The DAU data acquisition box 1 is installed inside the side wall or central partition wall and can be shared with other equipment boxes in the tunnel. The DAU data acquisition box 1 mainly includes a waterproof enclosure, a power conversion module, a signal acquisition module, a storage module, and a communication module.

[0029] The triaxial displacement gauge 2 and the pressure box 3 are respectively installed inside the immersed tube section 18 and at the bottom of the tube. The data collected by the triaxial displacement gauge 2 and the pressure box 3 are transmitted to the data analysis and decision module through the DAU data acquisition box 1. The data analysis and decision module sends control commands to the settlement active adjustment module 5 through the data transmission line 4.

[0030] The settlement active adjustment module 5 is cast into the immersed tube section 18 as a whole through the spiral steel bar 8 during the prefabrication of the immersed tube section 18, so as to realize the reuse of the settlement adjustment device.

[0031] The settlement active adjustment module 5 is isolated from the external river environment by a W-type rubber waterstop 10. The W-type rubber waterstop 10 is a stretchable and flexible structure used for stretching and stopping water during jacking operations.

[0032] The settlement active adjustment module 5 has a built-in retractable flexible grouting pipe 9. The retractable flexible grouting pipe 9 is connected to a grouting flange 6 through a grouting pipeline 7. The grouting flange 6 is externally connected to a grouting device, thus forming a grouting module.

[0033] The settlement active adjustment module 5 also includes a thrust rear end cover 12, a thrust front end cover 13, an outer steel cylinder 14, a telescopic piston 16, and a settlement adjustment support 11. The thrust rear end cover 12 and the thrust front end cover 13 are respectively installed at both ends of the outer steel cylinder 14. The thrust rear end cover 12 and the thrust front end cover 13 are provided with enlarged ribs to provide reaction force during the jacking operation.

[0034] The settlement active adjustment module 5 adopts a built-in structure, which can realize real-time settlement adjustment, avoiding the damage to the immersed tube structure and traffic interruption caused by traditional disease treatment. At the same time, compared with conventional passive pipe bottom grouting settlement adjustment, it can achieve high-precision active settlement adjustment through precise calculation of jacking range and jacking force.

[0035] The two ends of the telescopic piston 16 are respectively installed on the thrust rear end cover 12 and the settlement adjustment support 11, and the pressure box 3 is located at the bottom of the settlement adjustment support 11.

[0036] The W-type rubber waterstop 10 is sleeved on the outside of the telescopic piston 16. The telescopic piston 16 is connected to the inside of the outer steel cylinder 14. The telescopic piston 16 is driven by hydraulic pressure inside the outer steel cylinder 14. After receiving instructions from the data analysis and decision module, the telescopic piston 16 performs the lifting operation.

[0037] The thrust front end cover 13 is also equipped with a grouting blowout prevention device 15. The telescopic flexible grouting pipe 9 is built into the inside of the telescopic piston 16. The top end of the telescopic flexible grouting pipe 9 is connected to the grouting blowout prevention device 15. The risk of grouting surge is reduced by the grouting blowout prevention device 15.

[0038] The construction method for active control of uneven settlement in a dual-purpose (railway and highway) immersed tunnel includes the aforementioned active control device for uneven settlement in such tunnels, and further includes the following steps: S1. After the immersed tunnel is laid and connected, the displacement and bottom pressure of the immersed tunnel section 18 are monitored in real time through a data acquisition module, and the attitude of the immersed tunnel section 18 is also monitored in real time; S2. The data analysis and decision-making module calculates and analyzes the data collected by the data acquisition module. If the analysis result determines that the safety threshold is exceeded, an early warning is issued and feasible disposal plan suggestions are provided. The disposal plan includes the jacking torque and travel distance, grouting pressure, and grouting volume; S3. Based on the jacking torque and travel distance determined by the disposal plan, the system is activated... The jacking module is activated until the predetermined settlement control design index is reached, completing the jacking operation of the immersed tunnel section 18; S4, after the tunnel section is jacked, the data analysis and decision module calculates the void volume at the bottom of the tunnel and provides suggested grouting pressure and grouting volume; S5, the grouting module is activated, and the grouting construction process is monitored in real time by the data acquisition module, and the grouting pressure and grouting are dynamically calculated, analyzed and adjusted by the data analysis and decision module; S6, the immersed tunnel foundation 17 is scanned using a multi-wavelength non-destructive testing method. If the scan results show that the immersed tunnel foundation 17 has no voids, the uneven settlement treatment is completed. If voids are found, a second grouting reinforcement treatment is carried out until the immersed tunnel foundation 17 is completely compacted.

[0039] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above are only preferred embodiments of this application. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. An active control device for uneven settlement of immersed tunnels used for both road and rail transport, characterized in that: It includes a data acquisition module, a data analysis and decision-making module and a settlement active adjustment module (5). The data acquisition module includes a DAU data acquisition box (1), a triaxial displacement meter (2), a pressure box (3) and a data transmission line (4). The data analysis and decision-making module includes a data preprocessing and control server, a database server, a web server, and a data early warning and evaluation server. The data preprocessing and control server, the database server, the web server, and the data early warning and evaluation server can all access big data through the active settlement control center switch and realize artificial intelligence autonomous decision-making and control. The settlement active adjustment module (5) includes a jacking module and a grouting module. The jacking module and the grouting module are integrated in the same device. The data acquisition module collects the settlement data of the immersed tube section (18) in real time. The data analysis and decision module calculates and generates control commands to dynamically adjust the jacking torque and stroke of the jacking module. After the settlement of the immersed tube section (18) is adjusted to meet the predetermined target, the grouting operation is completed through the grouting module. The settlement active adjustment module (5) is isolated from the external river environment by a W-type rubber waterstop (10). The W-type rubber waterstop (10) is a stretchable and flexible structure used for stretching and stopping water during jacking operations. The settlement active adjustment module (5) further includes a thrust rear end cover (12), a thrust front end cover (13), an outer steel cylinder (14), a telescopic piston (16), and a settlement adjustment support (11). The thrust rear end cover (12) and the thrust front end cover (13) are respectively installed at both ends of the outer steel cylinder (14). The thrust rear end cover (12) and the thrust front end cover (13) are provided with enlarged ribs. The two ends of the telescopic piston (16) are respectively installed on the thrust rear end cover (12) and the settlement adjustment support (11). The W-shaped rubber waterstop (10) is sleeved on the outside of the telescopic piston (16). The telescopic piston (16) is connected to the inside of the outer steel cylinder (14). The telescopic piston (16) is hydraulically driven by the inside of the outer steel cylinder (14).

2. The active control device for uneven settlement of immersed tunnels for both road and rail use as described in claim 1, characterized in that: The DAU data acquisition box (1) is installed inside the side wall or the middle partition wall. The DAU data acquisition box (1) includes a waterproof chassis, a power conversion module, a signal acquisition module, a storage module and a communication module. The triaxial displacement gauge (2) and the pressure box (3) are respectively installed inside the immersed tube section (18) and at the bottom of the tube. The data collected by the triaxial displacement gauge (2) and the pressure box (3) are transmitted to the data analysis and decision module through the DAU data acquisition box (1). The data analysis and decision module sends control commands to the settlement active adjustment module (5) through the data transmission line (4).

3. The active control device for uneven settlement of immersed tunnels for both road and rail use as described in claim 1, characterized in that: The settlement active adjustment module (5) is cast into the immersed tube section (18) by spiral steel bars (8) during the prefabrication of the immersed tube section (18).

4. The active control device for uneven settlement of immersed tunnels for both road and rail use as described in claim 1, characterized in that: The settlement active adjustment module (5) has a built-in retractable flexible grouting pipe (9), which is connected to a grouting flange (6) through a grouting pipeline (7). The grouting flange (6) is externally connected to a grouting device, thus forming a grouting module.

5. The active control device for uneven settlement of immersed tunnels for both road and rail use as described in claim 4, characterized in that: The thrust front end cover (13) is also equipped with a grouting anti-blowout device (15). The retractable flexible grouting pipe (9) is built into the retractable piston (16). The top end of the retractable flexible grouting pipe (9) is connected to the grouting anti-blowout device (15).

6. The active control device for uneven settlement of immersed tunnels for both road and rail use as described in claim 4, characterized in that: The pressure box (3) is located at the bottom of the settlement adjustment support (11).

7. A construction method for actively controlling uneven settlement of a dual-purpose (railway and highway) immersed tunnel, characterized in that: The active control device for uneven settlement of immersed tunnels for both road and rail use, as described in any one of claims 1 to 6, further includes the following steps: S1. After the immersed tube is laid and connected, the displacement of the immersed tube section (18) and the pressure at the bottom of the tube are monitored in real time through the data acquisition module, and the attitude of the immersed tube section (18) is monitored in real time. S2. The data analysis and decision-making module calculates and analyzes the data collected by the data acquisition module. If the analysis result determines that the data exceeds the safety threshold, it issues an early warning and provides feasible handling solutions. The handling solutions include the lifting torque and stroke distance, the grouting pressure and the grouting volume. S3. Start the lifting module according to the lifting torque and travel distance determined by the treatment plan until the predetermined settlement control design index is reached, and complete the lifting operation of the immersed tube section (18). S4. After the pipe section is lifted, the data analysis and decision-making module calculates the void volume at the bottom of the pipe and provides suggested grouting pressure and grouting volume. S5. Start the grouting module. During the grouting process, the data acquisition module monitors the pipe section posture in real time, and the data analysis and decision module dynamically calculates, analyzes and adjusts the grouting pressure and grouting. S6. The immersed tube foundation (17) is scanned using a multi-wave non-destructive testing method. If the scan results show that the immersed tube foundation (17) has no voids, the uneven settlement treatment is completed. If voids are found, a second grouting reinforcement treatment is carried out until the immersed tube foundation (17) is completely compacted.

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