A tunnel power grid construction optimization method

Abstract

The present invention relates to the technical field of power grid construction management, and specifically discloses a method for optimizing tunnel power grid construction, including state judgment, which uses a state coefficient as a basis to judge whether a crushing device can normally complete all construction of a current construction section; if the judgment result in the judgment cycle is that it cannot be completed normally, the drum speed of the crushing device is adjusted according to an adjustment rule, and the state coefficient obtained after the speed is adjusted is re-judged until the state judgment of S4 is passed. The present invention can judge whether the device can successfully complete all construction of the current construction section in the current state based on data generated during the construction process of the crushing device, and avoid the problem of insufficient efficiency of the crushing device and inability to complete the construction as planned due to rapid failure of the cutter head as much as possible. Compared with frequent early replacement of the cutter head or arranging spare crushing equipment, a lower-cost processing solution is provided, and the construction efficiency can be maintained to the greatest extent to ensure that the construction process is not disordered.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid construction management, and more specifically, to a method for optimizing tunnel power grid construction. Background Art

[0002] Tunnel power grid is a project that lays tunnels underground to facilitate the installation and maintenance of power grid equipment. In the laying of tunnel power grid, the most common construction method is to use hydraulic equipment to push the prefabricated segmented pipes into the ground, and at the same time, crushing equipment cooperates to crush the soil and rocks in the pipes, and complete the entire construction process through segmented construction.

[0003] For some tunnel power grid construction projects that have requirements on construction time, the construction party will adopt a 24-hour non-stop construction plan to improve work efficiency. The problem is that the crushing heads used in the crushing equipment will wear out and need to be replaced. The current construction plan relies on the workers' experience to judge the replacement time. However, when faced with stones of different hardness conditions, the wear and tear of the same construction distance is obviously different. Workers often cannot accurately judge the replacement time. If the cutter head is replaced after the soil crushing efficiency is significantly reduced, it will delay the construction process. The characteristic of tunnel power grid construction is that the tunnel entrance is small and only one construction team can enter at a time. The construction links such as cable laying, ventilation laying, drainage laying and power distribution equipment laying need to enter the laid tunnel in time and order under the arrangement of the management personnel for construction. In other words, any delay in any link will affect the whole body and cause systemic impact.

[0004] In order to reduce the above-mentioned systematic impact and avoid construction delays caused by disrupting construction arrangements, the present invention proposes a tunnel power grid construction optimization method. Summary of the invention

[0005] The purpose of the present invention is to provide a tunnel power grid construction optimization method to solve the following technical problems:

[0006] How to avoid construction delays caused by disrupting construction arrangements and improve the accuracy and rationality of construction arrangements.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A tunnel power grid construction optimization method comprises the following steps:

[0009] S1. Construction division: The entire construction process is divided into several construction sections according to the length of the support pipe used, and then one construction section is equally divided into several continuous construction intervals;

[0010] S2. Data monitoring: Monitor and obtain the soil pressure, soil weight generated, and the change in cutter head mass after each construction section is completed when the crushing equipment passes through the construction section;

[0011] S3, data analysis: Generate a usage coefficient based on the soil pressure and soil weight when the crushing equipment passes through the construction area, and then iterate to obtain the state coefficient based on the usage coefficient and usage time;

[0012] S4. Status judgment: judge whether the crushing equipment can normally complete all construction of the current construction section based on the status coefficient;

[0013] S5, judgment loop: If the judgment result is that it cannot be completed normally, the drum speed of the crushing equipment is adjusted according to the adjustment rules, and the judgment is re-performed according to the state coefficient obtained after the speed adjustment until the state judgment of S4 is passed.

[0014] Through the above technical scheme: a tunnel power grid construction optimization method is provided, including construction division, data monitoring, data analysis, state judgment and judgment cycle, which can judge whether the equipment can successfully complete all construction of the current construction section in the current state based on the data generated during the construction process of the crushing equipment, and avoid the problem of insufficient efficiency of the crushing equipment and inability to complete the construction as planned due to rapid failure of the cutter head as much as possible. Compared with frequent early replacement of the cutter head or arranging spare crushing equipment, the present invention provides a lower-cost processing solution, and can maintain the construction efficiency to the greatest extent, ensuring that the construction process is not disordered. In addition, the parameters used in the present invention are also easy to obtain.

[0015] As a further technical solution of the present invention: the process of generating the use coefficient includes:

[0016]

[0017] Get the usage coefficient U of the i-th construction interval i , where f p (t) is the real-time obtained earth pressure changing function curve with time, F p (t) is the function curve of soil pressure changing with time under the preset standard state. is the starting point of construction time for the i-th construction interval, is the end point of the construction time of the i-th construction interval, m i is the weight of the crushed soil produced by the completion of the construction of the i-th construction section, m s It is the weight of crushed soil produced by completing the construction of the construction section of the same length under the preset standard state. δ1 is the first weight coefficient, δ2 is the second weight coefficient, δ1, δ2 and δ3 are set according to empirical data respectively, and c is the preset correction amount, which is a constant.

[0018] As a further technical solution of the present invention: the process of iteratively obtaining the state coefficient includes, through the iterative formula:

[0019]

[0020] Get the state coefficient St of the i-th construction interval i , among which, St i-1 is the state coefficient after completing the i-1th construction interval. When i=1, St # is the initial state coefficient, which is obtained by workers before construction. i is the time required to complete the construction of the ith construction interval, τ is the error correction coefficient, which is set based on empirical data and usually takes a value between 1.01 and 1.05, and t s is the time required to complete the construction of the same length of construction section under standard conditions, a is the gradient compensation coefficient, based on the U generated during the current construction segmentation process i The difference between the maximum value and the minimum value is obtained by selecting from a preset table, and b is a preset function index, which is a constant.

[0021] As a further technical solution of the present invention: the process of state judgment includes:

[0022] S4.1. Obtain the total number N of construction intervals in the current construction segment;

[0023] S4.2, St N Make a prediction and compare the predicted value with the critical threshold Cr; still in S4.3, if St N >Cr, the status judgment passes, otherwise fails.

[0024] Through the above technical solution: a process of obtaining a state coefficient and making a state judgment based on the state coefficient is provided. Through cyclic state judgment, a timely response can be made when the geological conditions handled by the crushing equipment change, the construction personnel can be reminded, and it can be judged whether the construction can continue.

[0025] As a further technical solution of the present invention: N The process of making a forecast involves:

[0026] The state coefficient St of the most recently completed i-th construction section i As a benchmark, through the formula:

[0027] St N =[Ni]×[St i-1 -St i ]

[0028] Get the predicted value St N , where N is the total number of construction intervals.

[0029] As a further technical solution of the present invention: the process of adjusting the drum speed of the crushing equipment according to the adjustment rule comprises:

[0030] S5.1. The current speed of the crushing equipment is adjusted to the preset minimum speed, which is the minimum speed allowed after geological conditions exploration, the maximum value between the minimum speed allowed by the crushing equipment and the minimum speed that does not affect the progress of the construction plan;

[0031] S5.2. Complete the construction of the i+1th construction section at the preset minimum speed and obtain the corresponding state coefficient St i+1 ;

[0032] S5.3, state coefficient St obtained by S5.2 i+1 Get the first adjusted forecast for the benchmark And Perform status judgment, and if the status judgment cannot be passed, an alarm is issued.

[0033] Through the above technical scheme: a process for adjusting the drum speed of the crushing equipment is provided. The present invention reduces the wear of the crushing cutter head during subsequent use by first reducing the speed to a preset minimum speed, delays the speed at which the crushing cutter head reaches a critical condition, avoids the crushing cutter head from being rapidly worn after reaching a critical condition, and thus requires replacement of the blade during tunnel construction, thereby avoiding the problem of disrupting the process schedule. Reducing the speed will reduce the crushing efficiency and increase the construction time, and this part of the increase in construction time is within the adjustment time range reserved in advance in the process schedule, that is, it has no impact on the planning and arrangement of the entire construction.

[0034] As a further technical solution of the present invention: comprising:

[0035] S5.4, if the status judgment is passed, the rotation speed of the crushing equipment to be constructed in the next construction section is increased by ΔV;

[0036] S5.5, obtaining the state coefficient corresponding to the construction section after the speed is increased, and performing state judgment on the state coefficient. If the state judgment passes, repeat S5.4;

[0037] S5.6: If it fails, the speed will not be increased.

[0038] Through the above technical solution: a solution of increasing the speed after reducing the speed is provided. On the premise of ensuring that the construction can be completed as planned by reducing the speed, the drum speed of the crushing equipment can be continuously increased to improve the construction efficiency.

[0039] As a further technical solution of the present invention: the soil pressure is obtained by a soil pressure sensor set on the support pipe. The weight of the soil during the construction of the construction section is the sum of the weight of the soil transported out and the predicted remaining amount. The soil pressure sensor setting process includes excavation: digging a pit of appropriate size at the selected monitoring point, installation: placing the soil pressure sensor in the excavated pit, ensuring that the sensor plane is consistent with the expected main pressure direction, backfilling: carefully backfilling the pit with original soil or specific materials to avoid damage to the sensor and ensure good contact between the soil and the sensor, and before officially starting monitoring, calibrating the sensor to ensure the accuracy of the data. This usually includes adjusting the relationship between the sensor output and the known pressure value. The predicted remaining amount is the part that cannot be transported out of the tunnel due to the obstruction of the crushing equipment during the operation of the equipment. It can be collected after the crushing equipment passes through the current construction partition, and the predicted remaining amount is obtained by statistics of the collected historical data.

[0040] Beneficial effects of the present invention:

[0041] (1) The present invention can judge whether the equipment can successfully complete all construction of the current construction section in the current state based on the data generated during the construction process of the crushing equipment, so as to avoid as much as possible the problem of insufficient efficiency of the crushing equipment and failure to complete the construction as planned due to rapid failure of the cutter head. Compared with frequent and early replacement of the cutter head or arranging spare crushing equipment, the present invention provides a lower-cost processing solution, and can maintain the construction efficiency to the greatest extent, ensuring that the construction process is not disrupted.

[0042] (2) The present invention can make timely responses when the geological conditions handled by the crushing equipment change through cyclic status judgment, remind the construction personnel, and judge whether the construction can continue.

[0043] (3) The present invention reduces the wear of the crushing cutter head during subsequent use by first reducing the rotation speed to a preset minimum rotation speed, delays the speed at which the crushing cutter head reaches a critical condition, and avoids the crushing cutter head from being rapidly worn after reaching a critical condition, which results in the blade having to be replaced during tunnel construction, thereby avoiding the problem of disrupting the process schedule. Reducing the rotation speed will reduce the crushing efficiency and increase the construction time, and this part of the increase in construction time is within the adjustment time range reserved in advance in the process schedule, that is, it has no impact on the planning and arrangement of the entire construction.

[0044] (4) The present invention can continuously increase the drum speed of the crushing equipment and improve the construction efficiency while ensuring that the construction can be completed as planned by reducing the rotation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] Figure 11 is a flowchart of the implementation steps of the optimization method of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1 As shown, in one embodiment, a tunnel power grid construction optimization method is provided, comprising the following steps:

[0049] S1. Construction division: Divide the entire construction process into several construction sections according to the length of the support pipe used, and then divide one construction section into several continuous construction intervals;

[0050] S2. Data monitoring: monitor and obtain the soil pressure, soil weight generated, and the change in cutter head mass after each construction section is completed when the crushing equipment passes through the construction section;

[0051] S3, data analysis: Generate a usage coefficient based on the soil pressure and soil weight when the crushing equipment passes through the construction area, and then iterate to obtain the state coefficient based on the usage coefficient and usage time;

[0052] S4. Status judgment: judge whether the crushing equipment can normally complete all construction of the current construction section based on the status coefficient;

[0053] S5, judgment loop: If the judgment result is that it cannot be completed normally, the drum speed of the crushing equipment is adjusted according to the adjustment rules, and the judgment is re-performed according to the state coefficient obtained after the speed adjustment until the state judgment of S4 is passed.

[0054] In this embodiment, a tunnel power grid construction optimization method is provided, including construction division, data monitoring, data analysis, state judgment and judgment cycle. It can judge whether the equipment can successfully complete all construction of the current construction section in the current state based on the data generated during the construction process of the crushing equipment, and avoid the problem of insufficient efficiency of the crushing equipment and inability to complete the construction as planned due to rapid failure of the cutter head as much as possible. Compared with frequent early replacement of the cutter head or arranging spare crushing equipment, the present invention provides a lower-cost processing solution, and can maintain construction efficiency to the greatest extent, ensuring that the construction process is not disordered. In addition, the parameters used in the present invention are also easy to obtain.

[0055] The process of generating the utilization coefficient includes:

[0056]

[0057] Get the usage coefficient U of the i-th construction interval i , where f p (t) is the real-time obtained earth pressure changing function curve with time, F p (t) is the function curve of soil pressure changing with time under the preset standard state. is the starting point of construction time for the i-th construction interval, is the end point of the construction time of the i-th construction interval, m i is the weight of the crushed soil produced by the completion of the construction of the i-th construction section, m s It is the weight of crushed soil produced by completing the construction of the construction section of the same length under the preset standard state. δ1 is the first weight coefficient, δ2 is the second weight coefficient, δ1, δ2 and δ3 are set according to empirical data respectively, and c is the preset correction amount, which is a constant.

[0058] The process of iteratively obtaining the state coefficient includes:

[0059]

[0060] Get the state coefficient St of the i-th construction interval i , among which, St i-1 is the state coefficient after completing the i-1th construction interval. When i=1, St # is the initial state coefficient, which is obtained by workers before construction. i is the time required to complete the construction of the ith construction interval, τ is the error correction coefficient, which is set based on empirical data and usually takes a value between 1.01 and 1.05, and t s is the time required to complete the construction of the same length of construction section under standard conditions, a is the gradient compensation coefficient, based on the U generated during the current construction segmentation process i The difference between the maximum value and the minimum value is obtained by selecting from a preset table, and b is a preset function index, which is a constant.

[0061] The process of status judgment includes:

[0062] S4.1. Obtain the total number N of construction intervals in the current construction segment;

[0063] S4.2, St N Make a prediction and compare the predicted value with the critical threshold Cr; still in S4.3, if St N >Cr, the status judgment passes, otherwise fails.

[0064] In this embodiment, a process of obtaining a state coefficient and making a state judgment based on the state coefficient is provided. Through cyclic state judgment, a timely response can be made when the geological conditions handled by the crushing equipment change, the construction personnel can be reminded, and it can be judged whether the construction can continue.

[0065] Among them, for St N The process of making a forecast involves:

[0066] The state coefficient St of the most recently completed i-th construction section i As a benchmark, through the formula:

[0067] St N =[Ni]×[St i-1 -St i ]

[0068] Get the predicted value St N , where N is the total number of construction intervals.

[0069] The process of adjusting the drum speed of the crushing equipment according to the adjustment rules includes:

[0070] S5.1. The current speed of the crushing equipment is adjusted to the preset minimum speed, which is the minimum speed allowed after geological conditions exploration, the maximum value between the minimum speed allowed by the crushing equipment and the minimum speed that does not affect the progress of the construction plan;

[0071] S5.2. Complete the construction of the i+1th construction section at the preset minimum speed and obtain the corresponding state coefficient St i+1 ;

[0072] S5.3, state coefficient St obtained by S5.2 i+1 Get the first adjusted forecast for the benchmark And Perform status judgment, and if the status judgment cannot be passed, an alarm is issued.

[0073] S5.4, if the status judgment is passed, the rotation speed of the crushing equipment to be constructed in the next construction section is increased by ΔV;

[0074] S5.5, obtain the state coefficient corresponding to the construction section after the speed is increased, and perform state judgment on the state coefficient. If the state judgment is passed, repeat S5.4; still S5.6, if it does not pass, do not increase the speed.

[0075] In this embodiment, a process for adjusting the drum speed of the crushing equipment is provided. The present invention reduces the wear of the crushing cutter head during subsequent use by first reducing the speed to a preset minimum speed, delays the speed at which the crushing cutter head reaches a critical condition, and avoids the crushing cutter head from being rapidly worn after reaching the critical condition, which results in the need to replace the blade during tunnel construction, thereby avoiding the problem of disrupting the process schedule. Reducing the speed will reduce the crushing efficiency and increase the construction time, and this increase in construction time is within the adjustment time range reserved in advance in the process schedule, that is, it has no impact on the planning and arrangement of the entire construction.

[0076] In this embodiment, a solution of increasing the rotation speed after reducing the rotation speed is provided. On the premise that the construction can be completed as planned by reducing the rotation speed, the drum rotation speed of the crushing equipment can be continuously increased to improve the construction efficiency.

[0077] In this embodiment, the soil pressure is obtained by the soil pressure sensor set on the support pipe. The weight of the soil during the construction of the construction section is the sum of the weight of the soil transported out and the predicted remaining amount. The soil pressure sensor setting process includes excavation: digging a pit of appropriate size at the selected monitoring point, installation: placing the soil pressure sensor in the excavated pit, ensuring that the sensor plane is consistent with the expected main pressure direction, backfilling: carefully backfilling the pit with original soil or specific materials to avoid damage to the sensor and ensure good contact between the soil and the sensor, and before officially starting monitoring, calibrating the sensor to ensure the accuracy of the data. This usually includes adjusting the relationship between the sensor output and the known pressure value. The predicted remaining amount is the part that cannot be transported out of the tunnel due to the obstruction of the crushing equipment during the operation of the equipment. It can be collected after the crushing equipment passes through the current construction zone, and the predicted remaining amount is obtained by collecting historical data statistics.

[0078] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A tunnel power grid construction optimization method, characterized in that: The steps include: S1. Construction division: Divide the entire construction process into several construction sections according to the length of the support pipe used, and then divide one construction section into several continuous construction intervals; S2. Data monitoring: monitor and obtain the soil pressure, soil weight generated, and the change in cutter head mass after each construction section is completed when the crushing equipment passes through the construction section; S3, data analysis: Generate a usage coefficient based on the soil pressure and soil weight when the crushing equipment passes through the construction area, and then iterate to obtain the state coefficient based on the usage coefficient and usage time; The process of generating the utilization factor includes, through the formula: Get the usage coefficient U of the i-th construction interval i , where f p (t) is the real-time obtained earth pressure changing function curve with time, F p (t) is the function curve of soil pressure changing with time under the preset standard state. is the starting point of construction time for the i-th construction interval, is the end point of the construction time of the i-th construction interval, m i is the weight of the crushed soil produced by the completion of the construction of the i-th construction section, m s is the weight of crushed soil produced by the construction of the same length of construction section under the preset standard state, δ1 is the first weight coefficient, δ2 is the second weight coefficient, and c is the preset correction amount; The process of iteratively obtaining the state coefficient includes the following steps: Get the state coefficient St of the i-th construction interval i , among which, St i-1 is the state coefficient after completing the i-1th construction interval. When i=1, St # is the initial state coefficient, t i is the time required to complete the construction of the i-th construction section, τ is the error correction coefficient, and t s is the time required to complete the construction of a construction section of the same length under standard conditions, a is the gradient compensation coefficient, and b is the preset function index; S4. Status judgment: judge whether the crushing equipment can normally complete all construction of the current construction section based on the status coefficient; The process of status judgment includes: S4.

1. Obtain the total number N of construction intervals in the current construction segment; S4.2, St N Make a prediction and compare the predicted value with the critical threshold Cr; S4.3, if St N >Cr, the status judgment passes, otherwise fails; S5, judgment cycle: if the judgment result is that it cannot be completed normally, the drum speed of the crushing equipment is adjusted according to the adjustment rules, and the state coefficient obtained after the speed adjustment is re-judged until the state judgment of S4 is passed; The process of adjusting the drum speed of the crushing equipment according to the adjustment rules includes: S5.

1. The current speed of the crushing equipment is adjusted to the preset minimum speed, which is the minimum speed allowed after geological conditions exploration, the maximum value between the minimum speed allowed by the crushing equipment and the minimum speed that does not affect the progress of the construction plan; S5.

2. Complete the construction of the i+1th construction section at the preset minimum speed and obtain the corresponding state coefficient St i+1 ; S5.3, state coefficient St obtained by S5.2 i+1 Get the first adjusted forecast for the benchmark And Perform status judgment, and if the status judgment cannot be passed, an alarm is issued.

2. A tunnel power grid construction optimization method according to claim 1, characterized in that: About St N The process of making a forecast involves: The state coefficient St of the most recently completed i-th construction section i As a benchmark, through the formula: St N =[N-i]×[St i-1 -St i ] Get the predicted value St N , where N is the total number of construction intervals.

3. A tunnel power grid construction optimization method according to claim 2, characterized in that: include: S5.4, if the status judgment is passed, the rotation speed of the crushing equipment to be constructed in the next construction section is increased by ΔV; S5.5, obtaining the state coefficient corresponding to the construction section after the speed is increased, and performing state judgment on the state coefficient. If the state judgment passes, repeat S5.4; S5.6: If it fails, the speed will not be increased.

4. A tunnel power grid construction optimization method according to claim 3, characterized in that: The soil pressure is obtained by a soil pressure sensor arranged on the support pipe. The weight of the soil in the construction area during the construction process is the sum of the weight of the transported soil and the predicted remaining amount.

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