A shield construction unearthed quantity management method based on triple checking

Abstract

The application discloses a kind of based on triple check's shield construction out of earth quantity management method, comprising: according to construction drawing and test boring parameter, issue the boring parameter technical instruction of each ring;Shield driver according to boring technical instruction boring, according to the requirement of journey control and volume control, carry out out of earth quantity control;Shift engineer according to boring technical instruction supervises and records actual boring parameter, out of earth quantity and other parameters to shield boring operation record table, out of earth quantity journey and volume control table are filled in;After each ring boring is completed, muck is transported to well mouth by electric car and is out of earth using gantry crane, and the gantry crane is equipped with electronic weighing system, the weight of each muck bucket under the condition of being filled with muck and the weight after being unloaded are weighed by lifting, and thus the weight of each ring muck is obtained;Volume scanning and muck weighing are carried out by mechanical intelligent system control.The application can effectively control the out of earth quantity, and avoid the disturbance to stratum.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction processing technology, and in particular to a method for managing the amount of excavated soil during shield tunneling based on triple verification. Background Technology

[0002] Shield tunneling is primarily used for subway construction in urban areas. These tunnels are typically laid beneath main urban roads, and some even pass under existing buildings, roads, and other structures. Underground pipelines and other infrastructure are also extensively distributed, making surface settlement control crucial. Even slight negligence can lead to ground subsidence, building settlement, pipeline rupture, and even road safety accidents. Research has found a positive correlation between these phenomena and over-excavation during shield tunneling. The amount of excavated soil directly reflects the degree of surface settlement, making the control of excavation volume paramount to ensuring the safety of surface structures. Cities exert significant oversight of surface settlement during shield tunneling, providing clear penalty details and warnings for different levels of settlement (collapse). The handling and rectification measures for incidents such as red alerts and collapses serve as a stringent constraint on similar construction companies. Therefore, ensuring the safety of tunnel boring and avoiding risks such as ground subsidence and building settlement are crucial to ensuring construction safety.

[0003] Currently, the commonly used methods for controlling the amount of excavated soil are volumetric and gravimetric methods. However, the actual results are not ideal, and these methods cause significant disturbance to the strata, which may lead to surface subsidence or uplift. Furthermore, the results are not intuitive enough and affect the judgment. Summary of the Invention

[0004] To address this, the present invention proposes a method for managing the amount of excavated soil during shield tunneling based on triple verification, in order to effectively control the amount of excavated soil and avoid causing significant disturbance to the strata.

[0005] A method for managing excavated soil volume during shield tunneling based on triple verification includes:

[0006] Based on the construction drawings and trial excavation parameters, technical instructions for the excavation parameters of each ring are issued. These technical instructions include total thrust, excavation speed, earth pressure, soil removal volume, grouting volume, and shield machine attitude.

[0007] The tunnel boring machine (TBM) operator excavates according to the tunneling technical instructions and controls the amount of excavated soil according to the requirements of stroke control and volume control; the on-duty engineer supervises the TBM tunneling parameters according to the tunneling technical instructions, records the actual tunneling parameters, excavated soil and other parameters, and fills in the TBM tunneling operation record form and the excavated soil stroke and volume control form.

[0008] After each ring of excavation is completed, the excavated soil is transported to the wellhead by battery-powered truck and unloaded by gantry crane. The gantry crane is equipped with an electronic weighing system, which weighs each excavated soil bucket when it is full of excavated soil and when it is unloaded, thus obtaining the weight of the excavated soil for each ring.

[0009] Volume scanning and soil weighing are controlled by a mechanical intelligent system.

[0010] The above-mentioned method for managing excavated soil volume during shield tunneling construction based on triple verification involves controlling the excavated soil volume by calculating the excavation distance for each full bucket of excavated soil in different geological strata based on geological survey data before construction. Then, a control command for the excavation distance per bucket of excavated soil is issued. The calculation method for the excavation distance for each full bucket of excavated soil is as follows:

[0011] The formula for calculating the amount of soil Q excavated per N meters of excavation is as follows:

[0012] Q = K * N * π * D 2 / 4

[0013] Where D represents the cutterhead excavation diameter and K represents the soil loosening coefficient;

[0014] The excavation distance N for each bucket of excavated soil is calculated by reverse calculation using the above formula. N is the travel control value for the amount of soil discharged per bucket.

[0015] The above-mentioned method for managing excavated soil during shield tunneling construction based on triple verification includes the following formula for calculating the weight (t) of excavated soil per ring:

[0016] t=(T1+T2+…+T n )-(t1+t2+…+t n )

[0017] Among them, T1, T2, T n Let t1, t2, and t3 represent the weights of the first, second, and nth hoppers respectively when they are full of construction waste. n These represent the weights of the first, second, and nth slag hoppers after they have been emptied of slag, respectively.

[0018] The above-mentioned method for managing the excavated soil volume during shield tunneling based on triple verification includes a step of volume scanning controlled by a mechanical intelligent system. This step employs LMS sensor hardware technology, based on the time-of-flight principle, to perform non-contact measurement of the excavated soil on the conveyor belt. By calculating the time difference between sending and receiving laser pulses, a 2D contour is calculated, and then combined with the conveyor belt speed, a volume signal is generated.

[0019] The above-mentioned method for managing the amount of excavated soil during shield tunneling based on triple verification includes a step of weighing excavated soil controlled by a mechanical intelligent system. In this step, a belt weighing scale is used to measure the weight of the excavated soil transported by the belt conveyor. The belt scale has a steel frame structure and is equipped with a metal pressure sensor, which is installed below the shield machine belt. When the excavated soil passes by, it will cause deformation of the weighing scale sensor. The weight of the excavated soil is calculated by the deformation amount and the deformation coefficient.

[0020] The above-mentioned method for managing excavated soil volume in shield tunneling based on triple verification includes an excavated soil volume and volume control table that records the actual excavation distance and volume of each bucket of excavated soil. Technicians compare and analyze the actual data with theoretical values ​​and automatic monitoring values. Data analysis can be performed by comparing the excavated soil volume under the same excavation distance or by comparing the excavation distance under the same excavated soil volume. The difference between the theoretical and actual values ​​can be used to determine the over- or under-excavation amount. Based on experience, if the difference is controlled within 3%, the excavated soil volume is considered normal; if it exceeds 3%, over- or under-excavation is identified. The analysis results also provide a basis for whether to take further measures.

[0021] The above-mentioned method for managing the excavated soil volume during shield tunneling based on triple verification involves the shield operator controlling the excavation process of each bucket and thereby adjusting the screw conveyor speed to control the excavated soil volume, ensuring that the excavated soil volume of each bucket is controlled within the specified excavation process range. The actual volume of each bucket is obtained by the on-duty engineer through the scale markings set in advance in the slag bucket.

[0022] The shield tunneling excavation management method based on triple verification provided by the present invention has the following beneficial effects:

[0023] 1. This practical construction method effectively controlled the settlement. After the tunnel was finally completed, the settlement of the existing station and passage was significantly reduced, and the maximum settlement of the existing section structure was also significantly controlled.

[0024] 2. By establishing a complete set of control methods, the management team can calculate the optimal tunneling parameters through data modeling before tunneling begins, and adjust them in a timely manner according to the different geological conditions of different sections, thereby accelerating the construction progress.

[0025] 3. By utilizing the "intelligent + manual verification" approach, an integrated management and control system was innovatively established, which effectively promoted the safety and controllability of on-site operations and solved potential safety hazards during construction.

[0026] 4. The over-excavation and under-excavation data analysis database of the waste management system can more reasonably derive overall data through the aggregation of a large amount of data, and implement targeted measures based on the analysis parameters. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the embodiments of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0028] Figure 1 This is a flowchart of a shield tunneling excavation management method based on triple verification according to an embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0030] This invention aims to control ground settlement and avoid uncontrollable risks during construction. It provides a method for managing excavated soil volume during shield tunneling based on triple verification. The method mainly manages the excavated soil volume during construction through three control measures: excavation process, excavated soil weight, and intelligent verification. It also clarifies the responsibilities of the management team and refines the division of labor; formulates control methods and inspection procedures to ensure the implementation of the main control principles; and integrates intelligent measures to improve data analysis and application, thereby gradually standardizing shield tunneling construction control.

[0031] To obtain accurate data on the amount of excavated soil for each ring, a method for controlling and managing excavated soil volume was established. This involved using an automatic monitoring system during tunneling to implement triple control measures: travel control, volume control, and weight control. After the entire ring was excavated, manual verification and comparative analysis of the travel and weight of each bucket were conducted. The core of this management and control method is to add travel control to the traditional volume and weight control, further quantifying the amount of excavated soil for each ring and each segment. Through a series of control and management measures, the amount of excavated soil for each ring was kept within a specified range, preventing surface subsidence or uplift caused by over- or under-excavation.

[0032] Please see Figure 1 One embodiment of the present invention proposes a method for managing the amount of excavated soil during shield tunneling construction based on triple verification, comprising:

[0033] Step 1: Based on the construction drawings and trial excavation parameters, issue technical instructions for the excavation parameters of each ring. The technical instructions for the excavation parameters include total thrust, excavation speed, earth pressure, excavated soil volume, grouting volume, and shield machine attitude.

[0034] The control of excavation volume involves calculating the excavation distance for each bucket of excavated soil in different strata based on geological survey data before construction. Then, a control command for the excavation distance per bucket is issued. The calculation method for the excavation distance for each bucket of excavated soil is as follows:

[0035] The formula for calculating the amount of soil Q excavated per N meters of excavation is as follows:

[0036] Q = K * N * π * D 2 / 4

[0037] Where D represents the cutterhead excavation diameter and K represents the soil loosening coefficient;

[0038] The excavation distance N for each bucket of excavated soil is calculated by reverse calculation using the above formula. N is the travel control value for the amount of soil discharged per bucket.

[0039] Step 2: The tunnel boring machine operator excavates according to the tunneling technical instructions and controls the amount of excavated soil according to the requirements of stroke control and volume control; the on-duty engineer supervises the tunneling parameters of the tunnel boring machine according to the tunneling technical instructions, and records the actual tunneling parameters, excavated soil and other parameters, and fills in the tunnel boring machine operation record form and the excavated soil stroke and volume control form.

[0040] The excavation volume and volume control table records the actual excavation process and volume of each bucket of excavated soil. Technicians compare and analyze the actual data with theoretical values ​​and automatic monitoring values. Data analysis can be performed by comparing the excavation volume under the same excavation process or by comparing the excavation process under the same excavation volume. The difference between the theoretical value and the actual value can be used to determine the over- or under-excavation amount. Based on experience, if the difference is controlled within 3%, the excavation volume is considered normal. If it exceeds 3%, it is considered that there is an over- or under-excavation phenomenon. The analysis results also provide a basis for whether to take measures in the next step.

[0041] The tunnel boring machine operator controls the excavation process of each bucket, thereby adjusting the screw conveyor speed to control the amount of soil discharged, ensuring that the amount of soil discharged from each bucket is controlled within the specified excavation process range. The actual volume of each bucket is obtained by the on-duty engineer through the scale markings set in advance in the slag bucket.

[0042] Step 3: After each ring of excavation is completed, the excavated soil is transported to the wellhead by battery-powered truck and unloaded by a gantry crane. The gantry crane is equipped with an electronic weighing system, which weighs each excavated soil bucket when it is full and when it is unloaded, thus obtaining the weight of the excavated soil for each ring.

[0043] The formula for calculating the weight t of each ring of slag is as follows:

[0044] t=(T1+T2+…+T n )-(t1+t2+…+t n )

[0045] Among them, T1, T2, T n Let t1, t2, and t3 represent the weights of the first, second, and nth hoppers respectively when they are full of construction waste. nThese represent the weights of the first, second, and nth slag hoppers after they have been emptied of slag, respectively.

[0046] The weighing data is filled out by the gantry crane operator in the gantry crane weighing record form, and the ground duty technicians are responsible for collecting and comparing the data. The weight of the slag and soil is related to the slag and soil improvement. In actual control, it is controlled by an empirical value of 5%. If there is any abnormality, the control team should be notified in time and corresponding technical measures should be formulated.

[0047] Step 4: Volume scanning and weighing of the slag are performed under the control of a mechanical intelligent system.

[0048] The mechanical intelligent system is a highly integrated risk management system for tunnel boring machine (TBM) construction. Each subsystem consists of hardware and software, with unified data interfaces and data upload capabilities to the cloud for remote operation and maintenance. The integrated system uses a unified power supply, ensuring safety and reliability while facilitating on-site installation and relocation. Signals from all subsystems are centrally connected to the control box, where data is centrally processed and displayed on the operator's cab screen.

[0049] Specifically, in the step of volume scanning controlled by the mechanical intelligent system, LMS sensor hardware technology is used. Based on the time-of-flight principle, non-contact measurement of the slag on the conveyor belt is performed. By the time difference between sending and receiving laser pulses, the 2D contour is calculated, and then combined with the belt speed, a volume signal is generated.

[0050] In the step of weighing excavated soil controlled by a mechanical intelligent system, a belt weighing scale is used to measure the weight of the excavated soil conveyed by the belt conveyor. The belt scale has a steel frame structure and is equipped with a metal pressure sensor, which is installed under the belt of the tunnel boring machine. When the excavated soil passes by, it will cause the sensor of the weighing scale to deform. The weight of the excavated soil is calculated by the deformation amount and the deformation coefficient.

[0051] In data analysis, theoretical data analysis is divided into three steps: establishing an experimental model, simulating the construction process, and data analysis. Using technology to simulate the tunneling state during construction, and under strict control of the required methods, different tunneling parameters are compared and analyzed to identify the control range and variation patterns of different tunneling parameters under this method. Reasonable advance speed, cutterhead rotation speed, and earth chamber pressure are then deduced as control parameters for the tunneling process, providing a safety barrier for earth pressure balance shield tunneling under existing subway lines.

[0052] The method of this invention, through triple control of stroke control, volume control, and weight control, plus intelligent verification, completely solves the problem of over-excavation during shield tunneling construction, which could only be remedied afterward. It improves upon this by using multi-process control methods plus intelligent verification, controlling the amount of excavated soil in each ring within the specified range, significantly reducing construction safety and improving construction efficiency.

[0053] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0054] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for managing excavated soil volume during shield tunneling construction based on triple verification, characterized in that, include: Based on the construction drawings and trial excavation parameters, technical instructions for the excavation parameters of each ring are issued. These technical instructions include total thrust, excavation speed, earth pressure, soil removal volume, grouting volume, and shield machine attitude. The tunnel boring machine (TBM) operator tunnels according to the technical instructions of the tunneling parameters and controls the amount of excavated soil according to the requirements of stroke control and volume control; the on-duty engineer supervises the TBM tunneling parameters according to the technical instructions of the tunneling parameters, records the actual tunneling parameters and the amount of excavated soil, and fills in the TBM tunneling operation record form and the excavated soil stroke and volume control form. After each ring of excavation is completed, the excavated soil is transported to the wellhead by battery-powered truck and unloaded by gantry crane. The gantry crane is equipped with an electronic weighing system, which weighs each excavated soil bucket when it is full of excavated soil and when it is unloaded, thus obtaining the weight of the excavated soil for each ring. Volume scanning and soil weighing are controlled by a mechanical intelligent system. To control the amount of excavated soil, the excavation distance for each full bucket of excavated soil in different strata is calculated based on geological survey data before construction. Then, a control command for the excavation distance per bucket of excavated soil is issued. The calculation method for the excavation distance for each full bucket of excavated soil is as follows: The formula for calculating the amount of soil Q excavated per N meters of excavation is as follows: Where D represents the cutterhead excavation diameter and K represents the soil loosening coefficient; The excavation distance N for each bucket of slag is calculated by reverse calculation using the above formula. N is the travel control value for the amount of soil discharged per bucket. In the step of volume scanning controlled by a mechanical intelligent system, LMS sensor hardware technology is used. Based on the time-of-flight principle, non-contact measurement of the slag on the conveyor belt is performed. By the time difference between sending and receiving laser pulses, the 2D contour is calculated, and then combined with the belt speed, a volume signal is generated. In the step of weighing excavated soil controlled by the mechanical intelligent system, a belt weighing scale is used to measure the weight of the excavated soil conveyed by the belt. The belt weighing scale has a steel frame structure and is equipped with a metal pressure sensor. It is installed under the shield machine belt. When the excavated soil passes by, it will cause the metal pressure sensor to deform. The weight of the excavated soil is calculated by the deformation amount and deformation coefficient. The excavation volume and excavation control table records the actual excavation distance and volume of each bucket of excavated soil. Technicians compare the actual data with the theoretical values ​​and perform calculations and analyses based on the automatic monitoring values. Data analysis involves comparing the excavation volume under the same excavation distance or comparing the excavation distance under the same excavation volume. The difference between the theoretical and actual values ​​can be used to determine the over- or under-excavation amount. Based on experience, if the difference is controlled within 3%, the excavation volume is considered normal; if it exceeds 3%, over- or under-excavation is identified. The analysis results also provide a basis for deciding whether to take further measures.

2. The method for managing excavated soil volume during shield tunneling based on triple verification according to claim 1, characterized in that, The formula for calculating the weight (t) of each ring of slag is as follows: t=(T1+ T2+…+ T n )-( t1+ t2+…+ t n ) Among them, T1, T2, T n Let t1, t2, and t3 represent the weights of the first, second, and nth hoppers respectively when they are full of construction waste. n These represent the weights of the first, second, and nth slag hoppers after they have been emptied of slag, respectively.

3. The method for managing excavated soil volume during shield tunneling based on triple verification according to claim 1, characterized in that, The tunnel boring machine operator controls the excavation process of each bucket, thereby adjusting the speed of the screw conveyor to control the amount of soil discharged, ensuring that the amount of soil discharged from each bucket is controlled within the specified excavation process range. The actual volume of each bucket is obtained by the on-duty engineer through the scale markings set in advance in the slag bucket.

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