A method for accurately determining shield excavation volume and its application

Abstract

The present invention provides a method and application for accurately determining the excavation volume of a shield machine. The method is based on soil mechanics and basic mathematical theories, and the model is simple and easy to understand. The method has strong practical engineering application and operability. Except for the unknown parameter of the formation loss rate, the other parameters can be obtained through survey reports, construction records, and calculation formulas. The present invention can be applied to accurately calculate the excavation volumes of various shield machines and the corresponding formation loss calculations caused by them, and can effectively monitor the excavation process and the excavation volume based on the analysis of the actual soil excavation volume, and provide intelligent early warning.

Description

Technical Field

[0001] The invention belongs to the technical field of shield construction, and in particular relates to a method for accurately determining the excavation volume of a shield and its application. Background Art

[0002] Earth pressure balance shield tunneling equipment is the main equipment for shield tunneling construction. Excavation volume control is an important part of earth pressure balance shield construction management.

[0003] During construction, it is necessary to control the amount of excavation by adjusting the speed of the screw conveyor to keep the amount of excavation balanced with the shield excavation volume, so that the shield excavation surface is in a stable state. Excavation volume that is too large will cause excessive loss of the excavation surface and collapse or cause excessive surface settlement; excavation volume that is too small will rapidly increase the pressure in the soil compartment. Therefore, in actual engineering, it is necessary to continuously calculate and analyze the current shield excavation volume and the corresponding stratum loss based on actual conditions.

[0004] At present, the analysis system of the excavated volume of shield tunneling construction is basically based on the manual recording of the number of excavated buckets to calculate the overall excavated volume, and the accuracy is low. The measurement reflects the total volume of the excavated virtual soil, and it is impossible to achieve real-time analysis and monitoring of the excavated volume. Summary of the invention

[0005] The first purpose of the present invention is to provide a method for accurately determining the amount of shield excavation in view of the shortcomings in the prior art.

[0006] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0007] A method for accurately determining the amount of excavated shield by a shield machine, characterized in that the method comprises the following steps:

[0008] S1. Based on the shield PLC excavation parameter collection and analysis system, determine the current excavation ring number of the shield, record the unloading time t1 when the muck truck starts loading, the unloading time t2 when the muck truck is full, and the corresponding jack stroke size L t1～t2 ;

[0009] S2. Obtain the liquid level change h in the muck truck through the liquid level sensor 增 The average moisture content of the slag in the slag truck is obtained by monitoring the moisture content sensor 渣 , where the average soil moisture content is ω 渣 The following moisture content is monitored by three moisture content sensors buried in the upper, middle and lower parts of the muck truck:

[0010] ω 渣 =(ω 上 +ω 中 +ω 下) / 3 Formula 1

[0011] In the above formula:

[0012] ω 渣 is the average moisture content of the muck in the muck truck;

[0013] ω 上 It is the moisture content value monitored by the moisture content sensor buried in the upper part of the muck truck;

[0014] ω 中 It is the moisture content value monitored by the moisture content sensor buried in the middle of the muck truck;

[0015] ω 下 It is the moisture content value monitored by the moisture content sensor buried in the lower part of the muck truck;

[0016] S3. Since the muck is remolded soil and is evenly mixed by the cutter head and propeller, the total volume of the muck produced can be considered to be composed of the volume of the muck solid particles and the water contained therein. Therefore, the solid volume of the muck in the muck truck is V 实渣 It can be calculated as follows:

[0017] V 实渣 =h 增 *S 底 *(1-ω 渣 ) Formula 2

[0018] In the above formula:

[0019] V 实渣 It is the actual volume of the muck in the muck truck;

[0020] h 增 The liquid level sensor obtains the change of the liquid level in the muck truck;

[0021] S 底 It is the soil loading bottom area of ​​the muck truck;

[0022] ω 渣 is the average moisture content of the muck in the muck truck;

[0023] S4. Calculate the solid soil volume V in the soil layer of the current excavation section 实地 :

[0024] V 实地 =V 理 *(1-n 地 ) Formula 3

[0025] or:

[0026] V 实地 =V 理 *(1-ω 地 ) Formula 4

[0027] In the above formula:

[0028] V 实地 It is the volume of solid soil in the soil layer of the current excavation section;

[0029] V 理 Theoretically calculate the excavated volume for the shield tunneling section;

[0030] n 地 is the measured value of the porosity of the current excavation section;

[0031] ω 地 It is the moisture content value of the soil layer in the current excavation section;

[0032] When the survey report provided shows that the current excavation stratum is a soft soil stratum, the calculation shall be made according to Formula 3;

[0033] When the survey report provided shows that the current excavation stratum is sandy soil, calculation shall be carried out according to Formula 4.

[0034] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0035] As the preferred technical solution of the present invention:

[0036] The theoretical calculation of the excavated volume V of the shield tunneling section 理 Obtained by the following formula:.

[0037] V 理 =π*D 2 *L t1～t2 / 4 Formula 5

[0038] In the above formula:

[0039] V 理 Theoretically calculate the excavated volume for the shield tunneling section;

[0040] D is the diameter of the shield machine;

[0041] L t1～t2 is the corresponding jack stroke size.

[0042] The second purpose of the present invention is to provide a method for determining the loss rate of solid soil in excavated strata in view of the deficiencies in the prior art.

[0043] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0044] A method for determining the real soil loss rate of a tunneling stratum, characterized in that: the method for determining the real soil loss rate of a tunneling stratum is based on the above-mentioned method for accurately determining the shield excavation volume, and comprises the following steps:

[0045] The soil loss rate of this excavation stratum V L It is obtained by the following formula:

[0046] V L =(V 实渣 -V 实地 ) / V 实地 Formula 6

[0047] In the above formula:

[0048] V L is the soil loss rate of the stratum during this excavation;

[0049] V 实渣 It is the actual volume of the muck in the muck truck;

[0050] V 实地 It is the volume of solid soil in the stratum of the current excavation section.

[0051] The third object of the present invention is to provide an intelligent early warning judgment method for shield tunneling in view of the deficiencies in the prior art.

[0052] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0053] A shield tunneling intelligent early warning judgment method, characterized in that: the shield tunneling intelligent early warning judgment method is based on the above-mentioned method for determining the solid soil loss rate of the tunneling stratum, and includes the following steps:

[0054] When the soil loss rate of the excavation stratum is V L Greater than V L标 , then alarm;

[0055] When the soil loss rate of the excavation stratum is V L Not greater than V L标 , the display is normal and no alarm occurs.

[0056] The fourth object of the present invention is to provide an intelligent early warning analysis system for shield tunneling based on actual soil excavation analysis to address the deficiencies in the prior art.

[0057] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0058] A shield tunneling intelligent early warning analysis system based on actual soil excavation analysis, characterized in that: the shield tunneling intelligent early warning analysis system based on actual soil excavation analysis includes an excavation analysis master control system, three moisture content sensors, two weight sensors and a liquid level sensor, the excavation analysis master control system is signal-connected to the shield machine PLC, the three moisture content sensors, the two weight sensors and the liquid level sensor, and the excavation analysis master control system executes the shield tunneling intelligent early warning judgment method steps described above.

[0059] A fifth object of the present invention is to provide an electronic device to address the deficiencies in the prior art.

[0060] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0061] An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus, and wherein:

[0062] a memory for storing a computer program,

[0063] A processor, wherein the processor is used to execute a computer program stored in a memory to implement the aforementioned method steps for accurately determining the shield excavation volume, or the aforementioned method steps for determining the solid soil loss rate of the excavation stratum, or the aforementioned method steps for intelligent early warning judgment of shield excavation.

[0064] Another object of the present invention is to provide a computer-readable storage medium to address the deficiencies in the prior art.

[0065] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0066] A computer-readable storage medium, characterized in that: a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method steps for accurately determining the shield excavation volume or the method steps for determining the solid soil loss rate of the excavation stratum described above or the method steps for intelligent early warning judgment of shield excavation described above are implemented.

[0067] The present invention provides a method and application for accurately determining the excavation volume of a shield machine. The method is based on soil mechanics and basic mathematical theories, and the model is simple and easy to understand. The method has strong practical engineering application and operability. Except for the unknown parameter of the formation loss rate, the other parameters can be obtained through the survey report, construction records, and calculation formulas. The present invention can be applied to accurately calculate the excavation volume of various shield machines and the corresponding formation loss calculation caused by them, and can effectively monitor the excavation process and the excavation volume based on the actual soil excavation volume analysis and provide intelligent early warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 This is a flow chart of the shield tunneling intelligent early warning judgment method provided by the present invention.

[0069] Figure 2 This is a diagram of the intelligent early warning analysis system for shield tunneling based on actual soil excavation analysis provided by the present invention. DETAILED DESCRIPTION

[0070] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0071] The above analysis method is analyzed in combination with two specific shield tunneling cases:

[0072] A water-rich sand layer section of Hangzhou Metro was selected. Based on the survey report, the excavation range of the section is sandy soil layer with an average soil moisture content of 0.27. This section uses a Herrenknecht shield machine with a cutter head excavation D = 6400mm. The size of the muck truck is 4m*2m*2.5m, and the bottom area is about 4*2m 2 =8m 2 .

[0073] According to the real-time monitoring data on site, when the muck truck is monitored from 0 to when it is basically full, the change in the liquid level inside it increases to 2.16m, and the moisture content of the muck is measured as ω 上 ,ω 中 ,ω 下 They are 0.285, 0.295, and 0.32 respectively, corresponding to the average value of the shield jack stroke L in this period of time. t1～t2 is 0.5m.

[0074] The soil moisture content is calculated according to formula 1:

[0075] ω 渣 =(ω 上 +ω 中 +ω 下 ) / 3=0.3

[0076] According to formula 3, the solid soil volume V 实渣 The calculation is as follows:

[0077] V 实渣 =h 增 *S 底 *(1-ω 渣 )=12.096m 3

[0078] During this excavation period, the theoretical excavation volume of the shield tunneling section is calculated as follows according to Formula 4:

[0079] V实地 =V 理 *(1-ω 地 )=π*D 2 *L t1～t2 / 4*(1-ω 地 )=11.736m 3

[0080] Based on formula 6, the soil loss rate V of the excavation stratum is calculated. L :

[0081] V L =(V 实渣 -V 实地 ) / V 实地

[0082] =(12.096-11.736) / 11.736=3.015‰

[0083] According to the "Guidance on Risk Control of Earth Pressure Balance Shield Construction in Shanghai Metro Tunnels" (STB-DQ-010002), the relevant indicators of stratum loss rate are stipulated according to different protection conditions of the surrounding environment, as shown in Table 1 and Table 2. It can be seen that the corresponding stratum loss rate has exceeded the first-level control standard for this excavation, and the corresponding stratum deformation is expected to exceed 10mm, but less than 20mm.

[0084] Table 1 Engineering environment safety level

[0085]

[0086] Table 2 Allowable values ​​of ground settlement caused by shield construction under different burial depths corresponding to a certain stratum loss rate (mm)

[0087]

[0088] Select another Hangzhou Metro XX soft soil layer section. Based on the survey report, the soil within the excavation range of the section is soft soil, and the porosity of the soil is n 地 The tunnel boring machine used in this section is Herrenknecht, with a cutter head excavation D = 6400mm. The internal dimensions of the muck truck are 4m*2m*2.5m, and the bottom area is about 4*2m 2 =8m 2 .

[0089] According to the real-time monitoring data on site, when the muck truck is monitored from 0 to when it is basically full, the liquid level change in it increases to 2.3m, and the moisture content of the muck is measured as ω 上 ,ω 中 ,ω 下 They are 0.235, 0.262, and 0.283 respectively, corresponding to the average value of the shield jack stroke L in this period of time.t1～t2 is 0.5m.

[0090] The soil moisture content is calculated according to formula 1:

[0091] ω 渣 =(ω 上 +ω 中 +ω 下 ) / 3=0.26

[0092] According to formula 3, the solid soil volume V 实渣 The calculation is as follows:

[0093] V 实渣 =h 增 *S 底 *(1-ω 渣 )=13.616m 3

[0094] During this excavation period, the theoretical excavation volume of the shield tunneling section is calculated as follows according to Formula 3:

[0095] V 实地 =V 理 *(1-n 地 )=π*D 2 *L t1～t2 / 4*(1-n 地 )=9.651m 3

[0096] Based on formula 6, the soil loss rate V of the excavation stratum is calculated. L :

[0097] V L =(V 实渣 -V 实地 ) / V 实地

[0098] =(13.616-9.651) / 9.651=4.018‰

[0099] According to the "Guidance on Risk Control of Earth Pressure Balance Shield Construction in Shanghai Metro Tunnels" (STB-DQ-010002), the relevant indicators of stratum loss rate are stipulated according to different protection conditions of the surrounding environment, as shown in Table 1 and Table 2. It can be seen that the corresponding stratum loss rate has exceeded the first-level control standard for this excavation, and the corresponding stratum deformation is expected to exceed 10mm, but less than 20mm.

[0100] The present invention also provides an intelligent early warning analysis system for shield tunneling based on analysis of actual soil discharge, comprising a total control system 2 for discharge analysis, three moisture content sensors 3, two weight sensors 5 and a liquid level sensor 6, wherein the liquid level sensor 6 and the three moisture content sensors 3 are arranged in the slag in a slag truck 4.

[0101] The unearthed volume analysis control system 2 is signal-connected to the shield machine PLC1, three moisture content sensors 3, two weight sensors 5 and liquid level sensor 6, and the unearthed volume analysis control system 2 executes the shield tunneling intelligent early warning judgment method steps described above.

[0102] The present invention also provides an electronic device, the electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus.

[0103] a memory for storing a computer program,

[0104] A processor, wherein the processor is used to execute a computer program stored in a memory to implement the aforementioned method steps for accurately determining the shield excavation volume, or the aforementioned method steps for determining the solid soil loss rate of the excavation stratum, or the aforementioned method steps for intelligent early warning judgment of shield excavation.

[0105] The present invention provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method steps for accurately determining the shield excavation volume or the method steps for determining the solid soil loss rate of the excavation stratum or the method steps for intelligent early warning judgment of shield excavation are implemented.

[0106] The above-mentioned computer-readable storage medium can be any available medium or data storage device that can be accessed by the processor in the electronic device, including but not limited to magnetic storage such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc., optical storage such as CD, DVD, BD, HVD, etc., and semiconductor storage such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state drive (SSD), etc.

[0107] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0108] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0110] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0111] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for accurately determining the amount of shield excavation, characterized in that: The method for accurately determining the shield excavation volume comprises the following steps: S1. Based on the shield PLC excavation parameter collection and analysis system, determine the current excavation ring number of the shield, record the unloading time t1 when the muck truck starts loading, the unloading time t2 when the muck truck is full, and the corresponding jack stroke size L t1～t2 ; S2. Obtain the liquid level change h in the muck truck through the liquid level sensor 增 The average moisture content of the slag in the slag truck is obtained by monitoring the moisture content sensor 渣 , where the average soil moisture content is ω 渣 The following moisture content is monitored by three moisture content sensors buried in the upper, middle and lower parts of the muck truck: oh 渣 =(ω 上 +oh 中 +oh 下 ) / 3 formula1 In the above formula: ω 渣 is the average moisture content of the muck in the muck truck; ω 上 It is the moisture content value monitored by the moisture content sensor buried in the upper part of the muck truck; ω 中 It is the moisture content value monitored by the moisture content sensor buried in the middle of the muck truck; ω 下 It is the moisture content value monitored by the moisture content sensor buried in the lower part of the muck truck; S3, the solid soil volume V of the muck in the muck truck 实渣 It can be calculated as follows: V 实渣 =h 增 *S 底 *(1-ω 渣 ) Formula 2 In the above formula: V 实渣 It is the actual volume of the muck in the muck truck; h 增 The liquid level sensor obtains the change of the liquid level in the muck truck; S 底 It is the soil loading bottom area of ​​the muck truck; ω 渣 is the average moisture content of the muck in the muck truck; S4. Calculate the solid soil volume V in the soil layer of the current excavation section 实地 : V 实地 =V 理 *(1-n 地 ) Formula 3 or: V 实地 =V 理 *(1-ω 地 ) Formula 4 In the above formula: V 实地 It is the volume of solid soil in the soil layer of the current excavation section; V 理 Theoretically calculate the excavated volume for the shield tunneling section; n 地 is the measured value of the porosity of the current excavation section; ω 地 It is the moisture content value of the soil layer in the current excavation section; When the survey report provided shows that the current excavation stratum is a soft soil stratum, the calculation shall be made according to Formula 3; When the survey report provided shows that the current excavation stratum is sandy soil, calculation shall be carried out according to Formula 4.

2. The method for accurately determining the shield excavation volume according to claim 1 is characterized in that: The theoretical calculation of the excavated volume V of the shield tunneling section 理 It is obtained by the following formula: V 理 = π * D 2 * L t1～t2 / 4 Equation 5 In the above formula: V 理 Theoretically calculate the excavated volume for the shield tunneling section; D is the diameter of the shield machine; L t1～t2 is the corresponding jack stroke size.

3. A method for determining the loss rate of solid soil in excavated strata, characterized in that: The method for determining the loss rate of solid soil in the excavated stratum is based on the method for accurately determining the shield excavation volume according to claim 1, and comprises the following steps: The soil loss rate of this excavation stratum V L It is obtained by the following formula: V L = (V 实渣 - V 实地 ) / V 实地 Equation 6 In the above formula: V L is the soil loss rate of the stratum during this excavation; V 实渣 It is the actual volume of the muck in the muck truck; V 实地 It is the volume of solid soil in the stratum of the current excavation section.

4. A shield tunneling intelligent early warning judgment method, characterized in that: The shield tunneling intelligent early warning judgment method is based on the method for determining the real soil loss rate of the tunneling stratum according to claim 3, and comprises the following steps: When the soil loss rate of the excavation stratum is V L Greater than V L标 , then alarm; When the soil loss rate of the excavation stratum is V L Not greater than V L标 , the display is normal and no alarm occurs.

5. An intelligent early warning analysis system for shield tunneling based on analysis of actual soil excavation volume, characterized by: The shield tunneling intelligent early warning analysis system based on actual soil excavation analysis includes an excavation analysis master control system, three moisture content sensors, two weight sensors and a liquid level sensor. The excavation analysis master control system is signal-connected to the shield machine PLC, three moisture content sensors, two weight sensors and the liquid level sensor, and the excavation analysis master control system executes the steps of the shield tunneling intelligent early warning judgment method described in claim 4.

6. An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus, characterized in that: a memory for storing a computer program, A processor, the processor is used to execute a computer program stored in a memory to implement the method steps for accurately determining the shield excavation volume described in claim 1, or the method steps for determining the solid soil loss rate of the excavation stratum described in claim 3, or the method steps for intelligent early warning and judgment of shield excavation described in claim 4.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed by the processor, implements the method steps for accurately determining the shield excavation volume described in claim 1, the method steps for determining the solid soil loss rate of the excavation stratum described in claim 3, or the method steps for intelligent early warning judgment of shield excavation described in claim 4.

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