Loading method and system for supporting system of contact channel shield tunneling machine

Abstract

The invention discloses a loading method and system for a supporting system of a contact channel shield tunneling machine, and relates to the technical field of tunnel construction. During use, when the shield tunneling machine is subjected to multiple times of loading operation according to a preset time interval in a mode that loads are sequentially increased; therefore, the load data of the shield tunneling machine support system corresponding to each monitoring moment can be monitored and acquired in real time, the monitoring data corresponding to each monitoring time period of the shield tunneling machine support system can be determined in real time, and the deformation value of the segment ring at the corresponding moment can be obtained according to the acquired real-time load data. The real-time deformation value of the shield tunneling machine in the process of loading the supporting system of the shield tunneling machine can be determined, and accumulation of the deformation value of the segment ring caused by continuous loading is effectively avoided. And when the deformation value is larger than the preset value, the loading operation of the load is stopped, the load applied by the shield tunneling machine supporting system is adjusted in time according to the collected deformation result, accumulation of the deformation value of the segment ring is avoided in time, and the forming quality of the tunnel is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a method and system for loading a supporting system of a tunnel boring machine. Background Art

[0002] A shield machine is a specialized engineering machine used for tunnel excavation, widely used in subway, railway, highway, and hydropower tunnel projects. The shield machine support system is a crucial component of the machine. Its primary function is to apply thrust to the formed rings of segments during tunneling. This thrust acts behind the formed rings, creating a reaction force that propels the shield machine forward to continue tunneling.

[0003] However, when the thrust generated by the shield machine's support system acts on the formed segment ring, the thrust will cause the segment ring to deform. The existence of deformation will cause the segment ring to be damaged, affecting the construction quality of the shield tunnel.

[0004] In the existing technology, when monitoring the deformation of the segment ring, displacement sensors, pressure sensors, total stations and other equipment are usually used to directly monitor the deformation of the segment ring. Although such methods can monitor and obtain the deformation results of the segment ring, the results obtained are often cumulative deformation data, which affects the forming quality of the tunnel. Summary of the Invention

[0005] The main purpose of the present invention is to propose a loading method and system for the support system of a connecting channel shield machine, aiming to solve the technical problem that although the existing segment ring deformation monitoring method can monitor and obtain the deformation results of the segment ring, the results obtained are often cumulative deformation data, which affects the tunnel forming quality.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a method for loading a supporting system of a tunnel shield machine, comprising the following steps:

[0007] Controlling the shield machine to perform multiple load operations on the shield machine support system according to preset intervals; wherein the load of each load increases in sequence;

[0008] Real-time monitoring and acquisition of load data of the shield machine support system corresponding to each monitoring moment;

[0009] According to the load data, the deformation value of the segment ring at the corresponding moment is obtained;

[0010] When the deformation value is greater than a preset value, the loading operation of the load is stopped.

[0011] In one embodiment, the step of controlling the shield machine to perform multiple load operations on the shield machine support system according to a preset interval time includes:

[0012] According to the preset tension value borne by the shield machine support system, a preset interval time and the number of loading times of the shield machine support system are obtained;

[0013] According to the preset interval time and the number of loading times, the shield machine is controlled to perform multiple load loading operations on the shield machine support system according to the preset interval time.

[0014] In one embodiment, the step of controlling the shield machine to perform multiple load operations on the shield machine support system according to the preset interval time and the number of loading times includes:

[0015] Initializing the shield machine according to the preset interval time and the number of loading times so that the shield machine support system is in an unstressed state;

[0016] According to the preset interval length and the loading times, the shield machine is controlled to sequentially perform loading operations with increasing load until the deformation value of the segment ring is greater than a preset value, and then the loading is stopped;

[0017] The shield machine is controlled to perform loading operations with decreasing loads in sequence until unloading.

[0018] In one embodiment, the step of controlling the shield machine to sequentially perform loading operations with increasing loads according to the preset interval length and the number of loading times until the deformation value of the segment ring is greater than a preset value and then stopping loading includes:

[0019] According to the preset interval time and the number of loading times, the shield machine is controlled to perform a primary incremental loading operation to simulate an initial excavation state of the shield machine;

[0020] After the preset interval, continue to control the shield machine to repeatedly perform the incremental loading operation so that the shield machine can adapt to the increasing thrust during the tunneling process;

[0021] After the preset interval, the shield machine is continuously controlled to perform the incremental loading operation again, so that the shield machine can adapt to the full-load loading operation.

[0022] In one embodiment, the step of continuing to control the shield machine to perform the incremental loading operation again after the preset interval time so as to adapt the shield machine to the full load loading operation includes:

[0023] After the preset interval, the shield machine is continuously controlled to perform the incremental loading operation again, and loading is stopped when the deformation value of the segment ring approaches the preset value, so that the shield machine can adapt to the full-load loading operation.

[0024] In one embodiment, after the step of continuing to control the shield machine to perform the incremental loading operation again after the preset interval time so as to adapt the shield machine to the full-load loading operation, the method further includes:

[0025] The shield machine is controlled to perform a stability test under the load conditions corresponding to the full-load loading operation to obtain the stability and structural integrity of the support system under the load conditions.

[0026] In one embodiment, the step of controlling the shield machine to sequentially perform loading operations to unloading with decreasing load includes:

[0027] Controlling the shield machine to perform an initial load-decreasing loading operation until the load provided by the shield machine decreases to a load value corresponding to the primary load-decreasing operation;

[0028] After the preset interval, the shield machine is controlled to perform a load reduction loading operation again until the shield machine is unloaded.

[0029] In one embodiment, after the step of stopping the loading operation when the deformation value is greater than a preset value, the method further includes:

[0030] After the loading experiment is completed, the support system is evaluated and the applied load value is adjusted according to the evaluation results.

[0031] In one embodiment, after the step of evaluating the support system after the loading experiment is completed and adjusting the applied load value according to the evaluation result, the method further comprises:

[0032] Perform a safety check on the support system.

[0033] Based on the same technical concept, in a second aspect, the present invention further proposes a connecting channel shield machine support system loading system, which is used to execute the connecting channel shield machine support system loading method described in the first aspect.

[0034] The technical solution of the present invention can monitor and obtain the load data of the shield machine support system corresponding to each monitoring moment in real time when the shield machine performs multiple loading operations on the shield machine in a manner of increasing load in sequence according to preset intervals, thereby realizing the function of real-time determination of the monitoring data corresponding to the shield machine support system in each monitoring period. On this basis, the deformation value of the segment ring at the corresponding moment is obtained according to the obtained real-time load data, thereby enabling the present invention to accurately determine the real-time deformation value of the shield machine in the process of loading its support system, and effectively avoid the accumulation of deformation values ​​of the segment ring caused by continuous loading. Under this premise, when the deformation value is greater than the preset value, the load loading operation is stopped, thereby enabling the present invention to adjust the load applied by the shield machine support system in real time according to the collected deformation results during specific use, thereby immediately avoiding the accumulation of deformation values ​​of the segment ring and ensuring the forming quality of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] Figure 1 A flow chart of a method for loading a supporting system of a tunnel shield machine provided by the present invention;

[0037] Figure 2 for Figure 1 Flowchart of step S100 in the example;

[0038] Figure 3 for Figure 2 Flowchart of step S120 in the example;

[0039] Figure 4 for Figure 3 Flowchart of step S122 of the example;

[0040] Figure 5 for Figure 3 Flowchart of step S123 of the example;

[0041] Figure 6 Flowcharts illustrating some specific embodiments of the present invention.

[0042] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0043] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0044] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0045] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0046] The present application provides a kind of liaison passage shield machine support system loading method.

[0047] Please refer to Figures 1 to 6 , in order to facilitate understanding, the liaison passage shield machine support system loading method, comprising the following steps:

[0048] S100, control the shield machine according to preset interval duration to the shield machine support system is loaded multiple times load operation;Wherein, the load of each loading is sequentially increased.

[0049] In this step, the shield machine control system according to the preset interval duration, the shield machine support system is loaded multiple times load. The preset interval duration can be set according to specific engineering requirements, for example, it can be set to 5 minutes, 10 minutes or 15 minutes, etc. The load size of each loading is sequentially increased to simulate the different degrees of pressure borne by the shield machine in the process of tunneling.

[0050] Specifically, the shield machine control system applies loads to the support system through the hydraulic system. The initial load can be set at 20% of the support system's rated capacity, and then increased by 10% each time until it reaches 100% or higher. This incremental loading method allows for a comprehensive assessment of the support system's deformation under varying loads.

[0051] S200 , real-time monitoring and acquisition of load data of the shield machine support system corresponding to each monitoring moment.

[0052] In this step, the shield machine control system uses a sensor network to monitor and record the actual load data borne by the shield machine support system at each monitoring moment in real time. The sensor network may include strain gauges, pressure sensors, displacement sensors, and other sensors, deployed at key locations in the support system. The sensors can collect data at a high frequency, for example, 10 times per second, to ensure accurate load curves.

[0053] The control system filters and calibrates the collected raw data to eliminate noise interference and obtain accurate load data. Actual load data is stored in a time series format, with each data point associated with a precise timestamp to facilitate subsequent analysis.

[0054] S300, obtaining a deformation value of the segment ring at a corresponding moment according to the load data;

[0055] In this step, the shield machine control system calculates the deformation value of the segment ring at each monitoring moment based on the load data obtained in step S200, combined with the material properties and structural parameters of the segment ring, through a pre-established mechanical model.

[0056] Specifically, a finite element analysis method can be used to establish a numerical model of the segment ring. This model takes into account parameters such as the segment ring's geometric dimensions, the material's elastic modulus, and Poisson's ratio. The load data obtained in step S200 is input into the numerical model as boundary conditions, and the stress and deformation distributions at various locations in the segment ring are determined through iterative calculations. It should be further noted that the process of establishing the numerical model of the segment ring using finite element analysis, as illustrated in this embodiment, can be directly adapted from existing techniques and will not be further described here.

[0057] The control system focuses on the location of the maximum deformation of the segment ring, which usually occurs at the segment joint or the largest span. The system calculates the maximum deformation value as the output of this step.

[0058] S400: When the deformation value is greater than a preset value, the loading operation is stopped.

[0059] In this step, the shield machine control system compares the deformation value calculated in step S300 with a preset threshold value. The preset threshold value is the maximum allowable deformation of the segment ring determined according to engineering specifications and safety requirements, for example, it can be set to 1 / 1000 of the segment ring diameter.

[0060] If the detected deformation exceeds a preset value, the control system immediately issues a stop command, interrupting the hydraulic system's loading process to prevent excessive deformation and potential damage to the segment ring. The system also records the load value at that moment as the actual load-bearing capacity of the segment ring, providing a basis for subsequent adjustments to construction parameters.

[0061] To further illustrate the specific application of this method, a subway tunnel project is taken as an example. According to the above steps, it is described in detail from the perspective of the machine as follows:

[0062] A subway tunnel project uses prefabricated segments with an inner diameter of 6 meters for lining. Before the shield machine (TBM) advances, deformation monitoring of the installed segment rings is required to ensure their load-bearing capacity meets design requirements. The TBM control system first sets a preset interval of 10 minutes and an initial load of approximately 300 kN, 20% of the segment ring's design load capacity. The system then activates the hydraulic jacks to apply the load to the segment rings.

[0063] The sensor network collected load data in real time, 10 times per second. After 10 minutes, the system increased the load to 400 kN and continued monitoring. The control system used a pre-established finite element model to calculate the deformation of the segment ring based on the collected load data. At a load of 600 kN, the calculated maximum deformation was 5.8 mm, less than the preset threshold of 6 mm (1 / 1000 of the diameter).

[0064] The system continued to increase the load. When the load reached 750 kN, the calculated maximum deformation was 6.2 mm, exceeding the preset threshold. The control system immediately stopped loading and recorded the load of 750 kN as the actual load-bearing capacity of the segment ring. Based on this result, engineers could assess the safety factor of the segment ring and adjust subsequent construction parameters or strengthen support measures if necessary.

[0065] This method can promptly identify potential deformation risks in the segment ring during shield construction, preventing cumulative deformation from adversely affecting tunnel quality. Through multiple incremental loading cycles and real-time monitoring, the deformation characteristics of the segment ring under different loads are comprehensively evaluated, providing a reliable basis for ensuring tunnel structural safety and optimizing construction parameters.

[0066] In this embodiment, when the shield machine performs multiple loading operations on the shield machine in a manner of increasing load in sequence according to preset intervals, the load data of the shield machine support system corresponding to each monitoring moment can be monitored and obtained in real time, thereby realizing the function of real-time determination of the monitoring data corresponding to the shield machine support system in each monitoring period. On this basis, the deformation value of the segment ring at the corresponding moment is obtained according to the obtained real-time load data, thereby enabling the present invention to accurately determine the real-time deformation value of the shield machine in the process of loading its support system, and effectively avoid the accumulation of deformation values ​​of the segment ring due to continuous loading. Under this premise, when the deformation value is greater than the preset value, the load loading operation is stopped, thereby enabling the present invention to adjust the load applied by the shield machine support system in real time according to the collected deformation results during specific use, thereby immediately avoiding the accumulation of deformation values ​​of the segment ring and ensuring the forming quality of the tunnel.

[0067] In one embodiment, step S100 includes:

[0068] S110 , obtaining a preset interval time and a number of loading times of the shield machine support system according to a preset tension value borne by the shield machine support system.

[0069] Specifically, the preset tensile force is determined based on a combination of factors, including the shield machine model, operating environment, and geological conditions. Typically, the preset tensile force ranges from 500kN to 2000kN. The preset interval duration refers to the time interval between two consecutive load cycles, typically ranging from 30 to 300 seconds. The number of load cycles refers to the total number of load cycles applied during the entire loading process, typically ranging from 5 to 20.

[0070] S120 , according to the preset interval time and the number of loading times, controlling the shield machine to perform multiple load loading operations on the shield machine support system according to the preset interval time.

[0071] Specifically, the shield machine's hydraulic system is first activated and placed in a standby state. Then, the shield machine's control system sets the loading parameters, including the preset interval duration and number of loads. Next, the first load is applied, with the hydraulic system applying tension to the support system according to the preset tension value. The loading duration typically ranges from 10 to 30 seconds, but can be adjusted based on actual conditions.

[0072] After the first load is complete, the system enters a waiting state for the preset interval. During this waiting period, the support system can relax appropriately, helping to reduce stress concentrations. After the waiting period, the system automatically begins the second load, and the process repeats.

[0073] The entire loading process is automatically executed by the shield machine's control system, and the operator only needs to monitor the parameters for normal operation. If any abnormality is detected during the loading process, such as unexpected deformation of the support system or a sudden drop in tension, the system will automatically stop loading and issue an alarm.

[0074] Through the above steps, the load application method of the present invention can effectively improve the stability and reliability of the shield machine support system. It also enables effective testing and verification of the support system, providing important guarantees for the safe operation of the shield machine. It also enables real-time measurement of segment ring deformation, preventing the accumulation of deformation errors.

[0075] In one embodiment, step S120 includes:

[0076] S121. Initialize the shield machine according to the preset interval time and the number of loading times, so that the shield machine support system is in an unstressed state.

[0077] In this step, check the operating status of the shield machine's hydraulic system to ensure normal oil pressure and that all valves are in the correct position. Then, return the shield machine's propulsion system to its initial position, maintaining a certain clearance between the support system and the segment rings—typically 10-20mm. Next, adjust the shield machine's posture so that its axis aligns with the tunnel centerline, with a deviation of no more than 5mm. Finally, remove any debris from the interface between the support system and the segment rings to ensure a smooth surface.

[0078] S122. According to the preset interval time and the loading times, control the shield machine to perform loading operations with increasing loads in sequence until the deformation value of the segment ring is greater than a preset value, and then stop loading.

[0079] The initial load value is set, usually 10% of the design load. Then, the load is added at preset intervals, with each load increasing by 10% of the design load. Each load duration is 30-60 seconds, which can be adjusted according to actual conditions.

[0080] During the loading process, the deformation of the segment ring is monitored in real time. If the deformation at any measuring point exceeds a preset value, loading is immediately stopped. This preset deformation value is typically 0.1%-0.2% of the ring diameter. For example, for a 6-meter diameter segment ring, the preset deformation value can be set between 6 and 12 mm.

[0081] S123, controlling the shield machine to sequentially perform loading operations with decreasing load until unloading.

[0082] Record the maximum load value reached in step S122. Then, gradually reduce the load at the same interval length and number of times as the loading. Each load reduction is 10% of the maximum load value.

[0083] During the unloading process, the deformation of the segment ring must also be monitored. The deformation recovery at each measuring point under different loads should be recorded. Unloading should be stopped when the load decreases to the initial load value.

[0084] After unloading is complete, keep the shield machine stationary for 5-10 minutes to observe the final deformation recovery of the segment ring. If there is residual deformation, the residual deformation value and its distribution need to be recorded.

[0085] Through the example process, the load loading method of the present invention can comprehensively evaluate the performance of the shield machine support system. This achieves a comprehensive evaluation of the support system performance and provides an important basis for the safe construction and performance optimization of the shield machine.

[0086] In one embodiment, step S122 includes:

[0087] S122a, controlling the shield machine to perform a primary incremental loading operation according to the preset interval time and the number of loading times, so as to simulate the initial excavation state of the shield machine.

[0088] Specifically, an initial load is set, typically 10% of the maximum design load. Loading is then applied at predetermined intervals, with each increment increasing by 5% of the maximum design load. Each loading period lasts 30-60 seconds, adjustable based on actual conditions. This initial incremental loading process is typically repeated 3-5 times to simulate the initial tunneling conditions of the shield machine.

[0089] During the loading process, the deformation of the segment ring is monitored in real time. High-precision displacement sensors are installed at key locations on the ring. Typically, there are 8-12 measurement points evenly distributed around the ring. The deformation value of each measurement point under different loads is recorded.

[0090] S122b. After the preset interval, continue to control the shield machine to repeatedly perform the incremental loading operation, so that the shield machine can adapt to the increasing thrust during the excavation process.

[0091] After completing the initial incremental loading process, continue loading while maintaining the preset interval. The loading increments during this phase can be increased appropriately, typically by 10% of the design maximum load. Repeated incremental loading is typically repeated 5-8 times to simulate the shield machine's gradual increase in thrust during tunneling.

[0092] During the loading process, in addition to monitoring the deformation of the segment rings, it is also necessary to monitor the pressure of the shield machine support system. Pressure sensors are installed at key locations in the support system to record the pressure distribution under different loads.

[0093] S122c, after the preset interval duration, continue to control the shield machine to perform the incremental loading operation again, so that the shield machine adapts to the full load loading operation.

[0094] After completing the repeated incremental loading operation, continue to keep the preset interval duration unchanged, and perform the final stage of loading. The loading increment can be further increased, and is usually 15%-20% of the design maximum load. The incremental loading operation is usually performed 2-3 times until the design maximum load is reached or the deformation value of the segment ring reaches the preset value.

[0095] At this stage, in addition to continuing to monitor the deformation value of the segment ring and the pressure value of the support system, the overall stability of the shield machine also needs to be closely monitored. The attitude change of the shield machine is monitored using an inclination sensor to ensure that the shield machine can still maintain a good attitude under full load.

[0096] Through the three-stage incremental loading operation, a comprehensive evaluation of the performance of the support system is achieved, which provides an important basis for the safe construction and performance optimization of the shield machine, and also provides an important basis for.

[0097] Step S122c includes:

[0098] After the preset interval duration, continue to control the shield machine to perform the incremental loading operation again, and stop loading when the deformation value of the segment ring approaches the preset value, so that the shield machine adapts to the full load loading operation.

[0099] Specifically, a preset deformation value is first determined. The preset deformation value is usually 0.1%-0.2% of the diameter of the segment ring. For example, for a segment ring with a diameter of 6 meters, the preset deformation value can be set to 6-12 mm. The selection of the preset deformation value needs to consider factors such as segment material and geological conditions, and can be calculated through finite element analysis or empirical formula.

[0100] Then, set the loading parameters. The loading increment of this stage is usually 15%-20% of the design maximum load. The preset interval duration can be kept the same as the previous two stages, or appropriately extended by 10%-20% to better observe the deformation of the segment ring under high load.

[0101] Next, start performing the incremental loading operation. After each loading, the load is kept constant for a period of time (usually 1 / 2 to 2 / 3 of the preset interval duration) to observe the deformation of the segment ring. A high-precision displacement sensor is used to monitor the deformation value of the segment ring in real time, and the number of measuring points is not less than 12, which are evenly distributed around the segment ring.

[0102] During the loading process, the deformation of the segment ring is closely monitored. When the deformation at any measuring point reaches 80% of the preset value, the loading increment is reduced to 1 / 2. When the deformation reaches 90% of the preset value, the loading increment is reduced to 1 / 2 again. This progressive loading method allows for more precise control of the final load value and avoids exceeding the preset deformation value.

[0103] At the same time, the pressure distribution of the shield machine's support system is monitored. Pressure sensors are installed at key locations in the support system to record the pressure distribution under different loads. By analyzing the pressure distribution, weak links in the support system can be identified, providing a basis for subsequent optimization.

[0104] When the deformation of the segment ring approaches the preset value (for example, 95% of the preset value), the loading is immediately stopped and the maximum load value at this time is recorded as the ultimate load capacity of the shield machine support system.

[0105] In one embodiment, after step S122c, the method further includes:

[0106] S122d. Control the shield machine to perform a stability test under the load conditions corresponding to the full-load loading operation to obtain the stability and structural integrity of the support system under the load conditions.

[0107] Specifically, first, determine the load conditions corresponding to a full-load operation. This typically refers to the maximum load value reached in step S122c, or 90%-95% of that value. The reason for choosing a load value slightly below the maximum load is to ensure the safety of the experimental process and to simulate the shield machine operating at near-full load for a long period of time.

[0108] During the experiment, all monitoring data were recorded every 30 minutes. If any abnormality was found, such as deformation exceeding the preset value, stress concentration, abnormal temperature increase, etc., the experiment should be stopped immediately and analyzed.

[0109] In one embodiment, step S123 includes:

[0110] S123a, controlling the shield machine to perform an initial load-decreasing loading operation until the load provided by the shield machine decreases to a load value corresponding to the primary load-increasing operation.

[0111] Specifically, first, determine the starting point for the initial load reduction. This typically refers to the maximum load value reached in step S122c. Then, set the load reduction rate. Generally, the load reduction rate should match the previous load increase rate, typically 10%-15% of the maximum load value for each reduction.

[0112] Next, the initial load reduction process begins. After each reduction, the load is held constant for a period of time (usually half the preset interval) to observe the elastic recovery of the support system. High-precision displacement sensors are used to monitor the deformation recovery of the segment ring in real time, with the number and location of measurement points remaining consistent with the loading phase.

[0113] S123b. After the preset interval, control the shield machine to perform a load reduction loading operation again until the shield machine is unloaded.

[0114] Specifically, after completing the initial load-decreasing operation, maintain the preset interval length and allow the support system to stabilize under a low load for a period of time (usually 30 minutes to 1 hour). The purpose of this stabilization period is to observe the stability of the support system under low load and its continuous deformation recovery. Then, the next load-decreasing operation is started. The load-decreasing rate can be appropriately accelerated, usually by 20%-25% of the load value corresponding to each initial load-decreasing operation.

[0115] In one embodiment, after step S400, the method further includes:

[0116] S500: After completing the loading experiment, the support system is evaluated, and the loading value is adjusted according to the evaluation result.

[0117] S600: Perform a safety inspection on the support system.

[0118] The shield machine support system load loading method provided by the present invention realizes comprehensive evaluation and continuous optimization of the support system performance through evaluation and safety inspection after the loading experiment, providing reliable guarantee for the safe and efficient operation of the shield machine.

[0119] Based on the same technical concept, in a second aspect, the present invention further proposes a connecting channel shield machine support system loading system, which is used to execute the connecting channel shield machine support system loading method described in the first aspect.

[0120] The connecting channel shield machine support system loading system provided in the embodiment of the present application adopts the connecting channel shield machine support system loading method in the above embodiment, which can solve the technical problem that although the segment ring deformation monitoring method can monitor and obtain the deformation results of the segment ring, the results obtained are often cumulative deformation data, which affects the forming quality of the tunnel. Compared with the existing technology, the beneficial effects of the connecting channel shield machine support system loading system provided in the embodiment of the present application are the same as the beneficial effects of the connecting channel shield machine support system loading method provided in the above embodiment, and the other technical features of the connecting channel shield machine support system loading system are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0121] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A method for loading a supporting system of a tunnel boring machine, characterized in that: The steps include: Controlling the shield machine to perform multiple load operations on the shield machine support system according to preset intervals; wherein the load of each load increases in sequence; Real-time monitoring and acquisition of load data of the shield machine support system corresponding to each monitoring moment; According to the load data, the deformation value of the segment ring at the corresponding moment is obtained; When the deformation value is greater than a preset value, the loading operation of the load is stopped.

2. The method for loading the supporting system of the connecting tunnel shield machine according to claim 1, characterized in that: The step of controlling the shield machine to perform multiple load operations on the shield machine support system according to preset intervals includes: According to the preset tension value borne by the shield machine support system, a preset interval time and the number of loading times of the shield machine support system are obtained; According to the preset interval time and the number of loading times, the shield machine is controlled to perform multiple load loading operations on the shield machine support system according to the preset interval time.

3. The method for loading the supporting system of the connecting tunnel shield machine according to claim 2, characterized in that: The step of controlling the shield machine to perform multiple load operations on the shield machine support system according to the preset interval time and the number of loading times includes: Initializing the shield machine according to the preset interval time and the number of loading times so that the shield machine support system is in an unstressed state; According to the preset interval length and the loading times, the shield machine is controlled to sequentially perform loading operations with increasing load until the deformation value of the segment ring is greater than a preset value, and then the loading is stopped; The shield machine is controlled to perform loading operations with decreasing loads in sequence until unloading.

4. The method for loading the supporting system of the connecting tunnel shield machine according to claim 3, characterized in that: The step of controlling the shield machine to sequentially perform loading operations with increasing loads according to the preset interval length and the number of loading times until the deformation value of the segment ring is greater than a preset value and then stopping loading includes: According to the preset interval time and the number of loading times, the shield machine is controlled to perform a primary incremental loading operation to simulate an initial excavation state of the shield machine; After the preset interval, continue to control the shield machine to repeatedly perform the incremental loading operation so that the shield machine can adapt to the increasing thrust during the tunneling process; After the preset interval, the shield machine is continuously controlled to perform the incremental loading operation again, so that the shield machine can adapt to the full-load loading operation.

5. The method for loading the supporting system of a tunnel shield machine according to claim 4, characterized in that: The step of continuing to control the shield machine to perform the incremental loading operation again after the preset interval time so as to adapt the shield machine to the full-load loading operation includes: After the preset interval, the shield machine is continuously controlled to perform the incremental loading operation again, and loading is stopped when the deformation value of the segment ring approaches the preset value, so that the shield machine can adapt to the full-load loading operation.

6. The method for loading the supporting system of a tunnel shield machine according to claim 5, characterized in that: After the step of continuing to control the shield machine to perform the incremental loading operation again after the preset interval time so as to adapt the shield machine to the full-load loading operation, the method further includes: The shield machine is controlled to perform a stability test under the load conditions corresponding to the full-load loading operation to obtain the stability and structural integrity of the support system under the load conditions.

7. The method for loading the supporting system of a tunnel shield machine according to claim 6, characterized in that: The step of controlling the shield machine to sequentially perform loading operations to unloading with decreasing load includes: Controlling the shield machine to perform an initial load-decreasing loading operation until the load provided by the shield machine decreases to a load value corresponding to the primary load-decreasing operation; After the preset interval, the shield machine is controlled to perform a load reduction loading operation again until the shield machine is unloaded.

8. The method for loading the supporting system of a tunnel shield machine according to claim 7, characterized in that: After the step of stopping the loading operation when the deformation value is greater than a preset value, the method further includes: After the loading experiment is completed, the support system is evaluated and the applied load value is adjusted according to the evaluation results.

9. The method for loading the supporting system of a tunnel shield machine according to claim 7, characterized in that: After the loading experiment is completed, the support system is evaluated and the loading value is adjusted according to the evaluation result. The method further includes: Perform a safety check on the support system.

10. A connecting channel shield machine support system loading system, characterized in that: Used to execute the connecting channel shield machine support system loading method as described in any one of claims 1 to 9.

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