Anchor rod pull-out test control method and system

Abstract

The invention relates to an anchor rod pull-out test control method and system, an anchor rod pull-out test is multi-stage loading and multi-stage unloading, and belongs to the technical field of anchor rod detection.The anchor rod pull-out test control method comprises the steps that test parameters are obtained, controlling the oil pump loading flow rate in each loading process and the oil pump unloading flow rate in each unloading process in the anchor rod pull-out test based on the test parameters; and controlling the oil pump loading pressure in each loading process and the oil pump unloading pressure in each unloading process in the anchor rod pull-out test based on the test parameters. In the pull-out test process, the oil pump flow speed and the oil pump pressure in the loading and unloading process of each stage are precisely controlled based on the test parameters, precise speed regulation of the loading and unloading process speed of each stage is achieved, the detection result is precise and reliable, errors are small, the standard requirements are met, and further, the test efficiency is improved by detecting the test state. And when the test state does not meet the preset state condition, the oil pump is controlled to stop working, so that the test safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of anchor rod detection, and in particular to an anchor rod pull-out test control method and system. Background Art

[0002] An anchor is a tension member that is connected to an external load-bearing member at one end and anchored in a stable rock and soil at the other end, transferring tension to the rock and soil. Anchor support refers to a reinforcement support method used in surface engineering such as slopes and deep rock and soil foundation pits, as well as underground chambers such as tunnels and mining sites. Anchor pull-out test can be used to determine the ultimate pull-out resistance of anchors, provide anchor design parameters and verify anchor construction technology. It can also determine whether the pull-out resistance of anchors meets the design requirements, providing a basis for project acceptance.

[0003] The existing anchor pull-out test often uses a manual puller to pull the anchor, and then uses a dial gauge to measure the displacement of the anchor after pulling after reaching the control pressure. The test process uses a manual oil pump to load and a hand-written displacement meter to read the readings, which has problems such as inaccurate pressure control, inaccurate loading and unloading rate control, and large errors in displacement reading and time interval control. In addition, the test process requires operators to be present at the test site. If abnormal conditions such as anchor breakage and oil pump damage occur, it may cause on-site safety accidents and it is difficult to ensure personal safety. The anchor pull-out test involves loading, unloading, displacement reading, and time interval counting, which require human operation at intervals, consuming a lot of manpower.

[0004] Therefore, how to improve the detection accuracy and efficiency during the anchor pulling detection process is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of this, it is necessary to provide an anchor pull test control method and system to improve the detection accuracy and detection efficiency during the anchor pull test process.

[0006] In order to solve the above problems, the present invention provides a control method for an anchor pull-out test, wherein the anchor pull-out test is a multi-stage loading and multi-stage unloading test, comprising: Acquire test parameters, and control the oil pump loading flow rate of each loading process and the oil pump unloading flow rate of each unloading process in the anchor pull-out test based on the test parameters; Based on the test parameters, the oil pump loading pressure of each loading process and the oil pump unloading pressure of each unloading process in the anchor pull-out test are controlled.

[0007] In a possible implementation, the controlling the oil pump loading flow rate of each loading process and the oil pump unloading flow rate of each unloading process in the anchor pull-out test based on the test parameters includes:

[0008] in, V i加载 For the i The oil pump loading flow rate of the stage, For the i The average loading time of the level, For the i Real-time loading time of the level, V i加载-1 For the i-1 The oil pump loading flow rate of the stage, V i卸载 For the i The oil pump unloading flow rate of the stage, For the i The average unloading time of the stage, For the i Real-time unloading time of the level, V i卸载-1 For the i-1 The oil pump unloading flow rate of the stage, f is the proportionality coefficient.

[0009] In a possible implementation, the test parameters include the load control value of each level. k i , Allowable load drop value g , Load the allowed overload value d and unloading allowable overload value e .

[0010] In a possible implementation, controlling the oil pump loading pressure of each loading process and the oil pump unloading pressure of each unloading process in the anchor pull-out test based on the test parameters includes: Obtain the oil pump pressure value in real time, and convert the real-time load value of the jack according to the jack rating curve; In the loading stage, the load is automatically loaded based on the loading speed until the real-time load value of the jack is loaded to the load control value corresponding to the level; After maintaining the load level for the first preset period of time, if the real-time load value of the jack increases during the load holding period, the oil pump is controlled to perform an unloading operation; if the real-time load value of the jack decreases during the load holding period, the oil pump is controlled to perform a reloading operation to maintain the real-time load value of the jack at ki - g~ki + d between; In the unloading stage, the jack is automatically unloaded based on the unloading speed until the real-time load value of the jack is unloaded to the load control value corresponding to the level; After maintaining the load level for the second preset period of time, if the real-time load value of the jack decreases during the load holding period, the oil pump is controlled to perform a reloading operation; if the real-time load value of the jack increases during the load holding period, the oil pump is controlled to perform an unloading operation, so that the real-time load value of the jack is maintained at ki -e~k i +g between.

[0011] In a possible implementation, the method further includes: The test status is monitored, and if the test status does not meet the preset status condition, the oil pump is controlled to stop working.

[0012] In a possible implementation, the test state includes real-time anchor displacement, and if the test state does not meet a preset state condition, the oil pump is controlled to stop working, including: If the real-time anchor rod displacement is not less than the preset anchor rod displacement, the oil pump is controlled to stop loading and an alarm is issued.

[0013] In a possible implementation, the test state includes a maximum loading time, and if the test state does not meet a preset state condition, the oil pump is controlled to stop working, including: If the longest loading time of this level is not less than the average loading time of this level, and the real-time load value of the jack is less than the load control value of this level, the oil pump will be controlled to stop loading and an alarm will be sounded.

[0014] In a possible implementation, the test state includes a maximum unloading time, and if the test state does not meet a preset state condition, the oil pump is controlled to stop working, including: If the longest unloading time of this stage is not less than the average unloading time of this stage, and the real-time load value of the jack is greater than the load control value of this stage, the oil pump is controlled to stop loading and an alarm is sounded.

[0015] In a possible implementation, the test state includes the displacement of the anchor rod and the real-time load value of the jack during the loading process. If the test state does not meet the preset state condition, the oil pump is controlled to stop working, including: Acquire the real-time displacement of the anchor rod at this level, and generate the displacement change curve of this level based on the real-time displacement of the anchor rod at this level; If the slope of the displacement change curve of this level is greater than the preset slope, and the real-time load value of the jack is less than the preset load value, the oil pump is controlled to stop loading and an alarm is issued.

[0016] On the other hand, the present invention also provides an anchor pull test control system, comprising: Host, integrated oil pump, wireless displacement sensor, jack, oil pipe, anchor rod, anchor, pressure plate and lithium battery, wherein the integrated oil pump, wireless displacement sensor and host are connected by wireless communication; The integrated oil pump has a built-in pressure sensor to obtain the oil circuit pressure value in real time and convert the real-time load value of the jack according to the jack rating curve; The wireless displacement sensor is installed at the upper end of the anchor rod body to obtain the anchor rod displacement data in real time; The host is built with the above-mentioned anchor pull test control method, which is used to control the pressure and flow rate during the loading and unloading of the oil pump during the pull test, and stop the test and alarm in abnormal circumstances.

[0017] The present invention accurately controls the oil pump flow rate and the oil pump pressure during each stage of loading and unloading based on the test parameters during the pulling test, thereby achieving accurate speed regulation of each stage of loading and unloading, so that the detection results are accurate and reliable, with small errors, and meet the requirements of specifications.

[0018] Furthermore, by detecting the test state, when the test state does not meet the preset state conditions, the oil pump is controlled to stop working, thereby ensuring the safety of the pulling test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A method flow chart of an embodiment of an anchor pull-out test control method provided by the present invention; Figure 2 A structural schematic diagram of an embodiment of an anchor pull-out test control system provided by the present invention. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0022] In the description of the embodiments of the present invention, unless otherwise specified, “plurality” means two or more than two.

[0023] The descriptions of "first", "second", etc. involved in the embodiments of the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the technical features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0024] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] The specific embodiments are described in detail below: See also Figure 1 , Figure 1 A flow chart of an embodiment of an anchor pull test control method provided by the present invention is provided. A specific embodiment of the present invention discloses an anchor pull test control method. The anchor pull test is multi-stage loading and multi-stage unloading, including: Step 101: Acquire test parameters, and control the oil pump loading flow rate of each loading process and the oil pump unloading flow rate of each unloading process in the anchor pull-out test based on the test parameters; Step 102: Controlling the oil pump loading pressure of each loading process and the oil pump unloading pressure of each unloading process in the anchor pull-out test based on the test parameters.

[0026] The present invention accurately controls the oil pump flow rate and the oil pump pressure during each stage of loading and unloading based on the test parameters during the pulling test, thereby achieving accurate speed regulation of each stage of loading and unloading, so that the detection results are accurate and reliable, with small errors, and meet the requirements of specifications.

[0027] Before conducting the test, the test parameters are explained first: The test parameters in the present invention include known parameters of inherent properties, test setting parameters, parameters calculated based on the test setting parameters, and real-time measurement parameters.

[0028] Among them, the inherent property known parameters include the rated force of the jack a (kN), maximum test load of anchor design P P (kN), rated flow rate of oil pump V 额 , real-time flow rate of the oil pump v Can be 0.01% V 额 to 100% V 额 Adjust between; The test setup parameters include the initial flow rate of the oil pump v 0, load control value for each level k i (kN), maximum control value of loading speed q max+, Loading speed minimum control value q min+ , maximum control value of unloading speed q max- And the minimum control value of unloading speed q min- , unit is kN / s.

[0029] According to the setting parameters, the parameters can be obtained, including: the absolute value of the difference between the current level and the previous level load control value: Δ = |k i - k i-1 | , where the load control value of each level is k i Different, so the load control value difference between the upper and lower levels Δ Not necessarily exactly the same; the maximum loading time of this level t max+ = Δ / q min+ , minimum loading time of this level t min+ = Δ / q max+ , average loading time of this level =( t max+ +t min+ ) / 2; Maximum unloading time of this level t max- = Δ / q min- , minimum unloading time of this level t min- = Δ / q max- , average unloading time of this level =( t max- +t min- ) / 2; Load the allowed overload value d =3%× Δ ; Unloading allowable overload value e =3%× Δ , Allowable load drop value g =10%× Δ The specification requires that the actual load value be within the range of ±10% of the controlled load value, and 3% and 10% are empirical values.

[0030] Furthermore, the parameters obtained in real time include the real-time load value of the jack P , real-time loading / unloading time t , Anchor displacement LThe real-time acquisition frequency of anchor displacement is consistent with that of load. It should be noted that when obtaining the real-time load value of the jack, P During the process, the oil pump's built-in pressure sensor can be used to obtain the oil circuit pressure value in real time, and then the jack's real-time load value can be converted according to the jack's rating curve.

[0031] In order to understand the present invention more clearly, the process of controlling the flow rate of the oil pump during the loading process and the unloading process is described below with a specific example: In one embodiment of the present invention, the oil pump loading flow rate of each loading process and the oil pump unloading flow rate of each unloading process in the anchor pull-out test are controlled based on the test parameters, including:

[0032] in, V i加载 For the i The oil pump loading flow rate of the stage, For the i The average loading time of the level, For the i Real-time loading time of the level, V i加载-1 For the i-1 The oil pump loading flow rate of the stage, V i卸载 For the i The oil pump unloading flow rate of the stage, For the i The average unloading time of the stage, For the i Real-time unloading time of the level, V i卸载-1 For the i-1 The oil pump unloading flow rate of the stage, f is the proportionality coefficient.

[0033] The derivation process of this calculation formula is now described in detail as follows: At the beginning of the test, the oil pump starts at the default gear 5, and the initial flow rate of the oil pump is v 0=0.5 V 额 , the first level load is loaded from 0 to the control load value k 1, where the previous level of the first level load control value defaults to 0.

[0034] Loading from 0 to 20% k 1 During the process, the time is recorded as t 1, where 20% is the preferred example, corresponding to the proportionality factor f ,in, f = (1 - n) / n , nIt is a percentage in the example, with a value of 5%-20%. Generally, if the time is too short, it is not representative of the average speed, and if the time is too long, it is not conducive to real-time speed adjustment.

[0035] like t min+ < t 1 / 20%< t max+ , continue to load the remaining 80% k 1, the next level of control load value is also loaded v 0.

[0036] like t 1 / 20%≥ t max+ ,or t 1 / 20%≤ t min+ , it means that the loading speed is not under control q min+~ q max+ If the oil pump needs to increase or decrease the flow rate within the range, the remaining 80% k1 load needs to be loaded at -t If the load is completed within 1 second, the remaining 80% of the load value will be loaded at 80% of the speed. k 1 / ( -t 1); Oil pump flow rate v 0= 0.5V 额 When loading, the speed is 20% k 1 / t 1. According to the corresponding relationship, the flow rate of the oil pump for the next 80% load control value needs to be adjusted to [ v 0 *80%k 1 / ( -t 1)] / ( 20%k 1 / t 1) Arrange the formula, that is, the oil pump flow rate adjustment v 1 =[2t 1 / ( -t 1) ]V 额 .

[0037] And so on, loading at the next level k 2, the oil pump flow rate continues to use the oil pump flow rate adjusted at the previous level v 1. In k 1 Load to 20%（k 2 -k 1 ）+k 1= 0.2Δ + k 1. Counting time during the process t 2. If t min+ ＜t 2 / 20%＜t max+ , the gear position is maintained v 1. Continue to load the remaining 80% ( k 2 -k 1), the next level of control load value is also loaded v 1st gear; like t 2 / 20%≥ t max+ ,or t 2 / 20%≤ t min+ , it means that the loading speed is not controlling the speed q min+~ q max+ The oil pump needs to increase or decrease the flow rate within the range. The remaining 80% Δ The loading needs to be -t If the load is completed within 2 hours, the remaining 80% of the load value will be loaded at a speed of 80%. Δ / ( -t 2) Oil pump flow rate v 1, the loading speed is 20% Δ / t 1. According to the corresponding relationship, we can conclude that the flow rate of the next 80% load control value oil pump needs to be adjusted to [ v 1 *80%Δ / ( -t 2)] / (20% Δ / t 2) Arrange the formula, that is, adjust the oil pump flow rate v 2 =4v 1 t 2 / ( -t 2) until the loading phase is completed and the maximum test load is reached k i =P P .

[0038] Similarly, in the process of adjusting the oil pump flow rate during unloading, assuming that the load value during unloading changes from k 8 Uninstall to k 9. The first 20% of unloading continues to use the previous level flow rate of the oil pump v 8. Keep track of time t 9. If t min- ＜t 9 / 20%＜t max- , the gear position is maintained v 8. Continue to uninstall the remaining 80% | k 9 -k 8|, the next level of control load value is also loaded v 8 gears, if t 9 / 20%≥ t max- ,or t 9 / 20%≤ t min- , it means that the unloading time is too long or too short, and the oil pump needs to increase or decrease the flow rate. The remaining 80% Δ Load unloading requires -t If the unloading speed is completed within 9, the remaining 80% of the load control value is 80% Δ / ( -t 9); Oil pump flow rate v 8:00, unloading speed is 20% Δ / t 9. According to the corresponding relationship, we can conclude that the flow rate of the next 80% load control value oil pump needs to be adjusted to [v 8 *80% Δ / ( -t 9) ] / ( 20%Δ / t 9), sort out the formula, that is, the oil pump flow rate adjustment v 9 =4v 8 t 9 / ( -t 9).

[0039] Therefore, according to the above process, we can get:

[0040] in, V i加载 For the i The oil pump loading flow rate of the stage, For the i The average loading time of the level, For the i Real-time loading time of the level, V i加载-1 For the i-1 The oil pump loading flow rate of the stage, V i卸载 For the i The oil pump unloading flow rate of the stage, For the i The average unloading time of the stage, For thei Real-time unloading time of the level, V i卸载-1 For the i-1 The oil pump unloading flow rate of the stage, f is the proportionality coefficient.

[0041] It should be noted that the main purpose of the embodiments of the present invention is to meet the loading and unloading speed required by the specification and control the loading and unloading accuracy. Under different environments, the loading and unloading speed is affected by the oil pump flow rate, the rated output of the jack, the on-site construction environment, the anchor process flow, etc. This embodiment reversely infers the oil pump flow rate required for the overall loading and unloading speed based on the loading and unloading conditions of the front section of a single anchor, determines the relationship between the loading and unloading speed and the oil pump flow rate, and then controls the oil pump flow rate to achieve the control of the loading and unloading speed.

[0042] In one embodiment of the present invention, the test parameters include the load control value of each level k i , Allowable load drop value g , Load the allowed overload value d and unloading allowable overload value e .

[0043] The oil pump loading pressure at each loading process and the oil pump unloading pressure at each unloading process in the anchor pull-out test are controlled based on the test parameters, including: Obtain the oil pump pressure value in real time, and convert the real-time load value of the jack according to the jack rating curve; In the loading stage, the load is automatically loaded based on the loading speed until the real-time load value of the jack is loaded to the load control value corresponding to the level; After maintaining the load level for the first preset period of time, if the real-time load value of the jack increases during the load holding period, the oil pump is controlled to perform an unloading operation; if the real-time load value of the jack decreases during the load holding period, the oil pump is controlled to perform a reloading operation to maintain the real-time load value of the jack at ki - g~ki + d between; In the unloading stage, the jack is automatically unloaded based on the unloading speed until the real-time load value of the jack is unloaded to the load control value corresponding to the level; After maintaining the load level for the second preset period of time, if the real-time load value of the jack decreases during the load holding period, the oil pump is controlled to perform a reloading operation; if the real-time load value of the jack increases during the load holding period, the oil pump is controlled to perform an unloading operation, so that the real-time load value of the jack is maintained at k i -e~k i +g between.

[0044] It can be understood that the oil pump loading pressure and the oil pump unloading pressure can be obtained in real time using the oil pump built-in pressure sensor. For the convenience of calculation, the oil pump loading pressure and the oil pump unloading pressure are converted into the real-time load value of the jack according to the jack rating curve.

[0045] Specifically, in the loading phase, k i ＞k i - 1. When controlling P Load to k i After that, if the pressure load exceeds the value during the load holding stage, P > k i +d , then unload, that is, control the oil pump to reduce the loading pressure value until P Reach target value k i , stop unloading; if the pressure is not enough or the pressure drops, P < k i -g , then reload is performed, that is, the oil pump is controlled to increase the loading pressure value, and the reload is k i , i.e. loading phase P Maintain k i -g < P < k i +d In the unloading phase, k i ＜k i - 1. When controlling P Uninstall to k i After that, if the pressure unloading exceeds the value during the load holding stage, P < k i -e , to supplement the load, control the oil pump to reduce the unloading pressure value until P Reach target value k i , stop loading; if the pressure goes up, P > k i +g , then unload, that is, control the oil pump to increase the unloading pressure value, unloading to k i , that is, the unloading phase P Maintain k i -e < P < k i +gHowever, in the current general control method, loading is only possible during the loading phase, and unloading is not possible; unloading is only possible during the unloading phase, and loading is not possible. The embodiments of the present invention break the inherent single loading and unloading, and cooperate with the algorithm to make the load control more accurate.

[0046] In one embodiment of the present invention, the method further comprises: Monitor the test status. If the test status does not meet the preset status conditions, control the oil pump to stop working. The test status includes real-time anchor displacement. If the test status does not meet the preset status conditions, control the oil pump to stop working, including: If the real-time anchor displacement is not less than the preset anchor displacement, the oil pump is controlled to stop loading and an alarm is sounded.

[0047] It is understandable that when controlling the loading and unloading speed, the anchor displacement is obtained in real time through the wireless displacement sensor. If the real-time anchor displacement is not less than the set maximum elongation, that is, the preset anchor displacement, the oil pump is controlled to stop loading and an alarm is processed, wherein the maximum elongation can be calculated by the anchor type and construction process. By setting the maximum elongation, the test is automatically judged, controlled to stop and an alarm is issued, which effectively avoids safety accidents caused by excessive pulling of the anchor or excessive lifting of the jack.

[0048] In one embodiment of the present invention, the test state includes a maximum loading time, and if the test state does not meet the preset state condition, the oil pump is controlled to stop working, including: If the longest loading time of this level is not less than the average loading time of this level, and the real-time load value of the jack is less than the load control value of this level, the oil pump will be controlled to stop loading and an alarm will be sounded.

[0049] It is understandable that during the loading phase, the cumulative loading time of this level is counted. t’ i+ ,like t’ i+ ≥ and P < k i , that is, the longest loading time of this level is not less than the average loading time of this level, and the real-time load is less than the load control value of this level, the oil pump is controlled to stop loading and an alarm is processed.

[0050] The test state includes the maximum unloading time. If the test state does not meet the preset state conditions, the oil pump is controlled to stop working, including: If the longest unloading time of this stage is not less than the average unloading time of this stage, and the real-time load value of the jack is greater than the load control value of this stage, the oil pump is controlled to stop loading and an alarm is sounded.

[0051] It is understandable that during the uninstallation phase, the cumulative uninstallation time of this level is counted. t’i- ,like t’ i- ≥ and P > k i That is, if the maximum unloading time of this level is not less than the average unloading time of this level, and the real-time load is greater than the load control value of this level, the oil pump is controlled to stop loading and an alarm is issued. It should be noted that the monitoring of the maximum test state can effectively prevent various abnormal situations on site during the loading and unloading stages due to lack of oil in the oil pump, damage to the jack, detachment of the anchor clip, etc. By setting the maximum loading and unloading time of the oil pump, automatically judging, controlling the test to stop and issuing an alarm, it can effectively avoid the oil pump from working too long and causing safety accidents.

[0052] In one embodiment of the present invention, the test state includes the displacement of the anchor rod and the real-time load value of the jack during the loading process. If the test state does not meet the preset state condition, the oil pump is controlled to stop working, including: Obtain the real-time displacement of the anchor rod at this level, and generate the displacement change curve of this level based on the real-time displacement of the anchor rod at this level; If the slope of the displacement change curve of this level is greater than the preset slope, and the real-time load value of the jack is less than the preset load value for a preset number of times, the oil pump is controlled to stop loading and an alarm is sounded.

[0053] It can be understood that in each level of automatic loading, the anchor displacement value is obtained in real time according to the set sampling frequency, such as 100ms, to generate the current level L - t The curve is fitted by the least square method for the displacement value points at this level. If the slope of the curve at a certain moment is m t ＞m t-1 , and the real-time load value of the jack during this level of loading P < k i-1 -g , appears twice in a row; it is judged that the anchor is broken, the oil pump is controlled to stop loading and an alarm is issued. By setting the automatic judgment of anchor breakage, control test stop and alarm, the occurrence of on-site accidents that affect personal safety can be effectively avoided.

[0054] In order to better implement the anchor rod pull-out test control method in the embodiment of the present invention, based on the anchor rod pull-out test control method, correspondingly, Figure 2 As shown, the embodiment of the present invention further provides an anchor pull test control system, and the anchor pull test control system 200 includes: Host 201, integrated oil pump 202, wireless displacement sensor 203, jack 204, oil pipe 205, anchor rod 206, anchor 207, pressure plate 208 and lithium battery 209, wherein the integrated oil pump 202, wireless displacement sensor 203 and host 201 are connected by wireless communication; The integrated oil pump 202 has a built-in pressure sensor for obtaining the oil circuit pressure value in real time and converting the real-time load data of the jack 204 according to the jack rating curve; The wireless displacement sensor 203 is installed at the upper end of the anchor rod 206 to obtain the anchor rod displacement data in real time; The oil pipe 205 is used to transmit the oil circuit in the integrated oil pump, the anchor rod 206 is used to quantify the anchor rod pull-out test, the anchor 207 is used to fix the anchor rod 206, the pressure plate 208 is used to bear the weight of the system 200, and the lithium battery 209 is used to provide power for the system 200; The host 201 is built with the above-mentioned anchor pull test control method, which is used to control the pressure and flow rate during the loading and unloading of the oil pump during the pull test, and stop the test and alarm in abnormal situations.

[0055] By adopting wireless communication methods, on the one hand, the test personnel can be kept away from the test site to protect their personal safety. On the other hand, it reduces cables, facilitates operation, and does not require manual operation during the entire test process, saving manpower.

[0056] The anchor pull-out test control system 200 provided in the above embodiment can implement the technical solution described in the above anchor pull-out test control method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above anchor pull-out test control method embodiment, which will not be repeated here.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An anchor pull test control method, characterized in that: The anchor pull-out test is a multi-stage loading and multi-stage unloading test, and the method includes: Acquire test parameters, and control the oil pump loading flow rate of each loading process and the oil pump unloading flow rate of each unloading process in the anchor pull-out test based on the test parameters; Based on the test parameters, the oil pump loading pressure of each loading process and the oil pump unloading pressure of each unloading process in the anchor pull-out test are controlled.

2. The anchor pull test control method according to claim 1, characterized in that: The method of controlling the oil pump loading flow rate of each stage of the loading process and the oil pump unloading flow rate of each stage of the unloading process in the anchor pull-out test based on the test parameters includes: in, V i加载 For the i The oil pump loading flow rate of the stage, For the i The average loading time of the level, For the i Level real-time loading time, V i加载-1 For the i-1 The oil pump loading flow rate of the stage, V i卸载 For the i The oil pump unloading flow rate of the stage, For the i The average unloading time of the stage, For the i Real-time unloading time of the level, V i卸载-1 For the i-1 The oil pump unloading flow rate of the stage, f is the proportionality coefficient.

3. The anchor pull test control method according to claim 2, characterized in that: The test parameters include the load control value for each level k i , Allowable load drop value g , Load the allowed overload value d and unloading allowable overload value e .

4. The anchor pull test control method according to claim 3, characterized in that: Based on the test parameters, the oil pump loading pressure of each loading process and the oil pump unloading pressure of each unloading process in the anchor pull-out test are controlled, including: Obtain the oil pump pressure value in real time, and convert the real-time load value of the jack according to the jack rating curve; In the loading stage, the load is automatically loaded based on the loading speed until the real-time load value of the jack is loaded to the load control value corresponding to the level; After maintaining the load level for the first preset period of time, if the real-time load value of the jack increases during the load holding period, the oil pump is controlled to perform an unloading operation; if the real-time load value of the jack decreases during the load holding period, the oil pump is controlled to perform a reloading operation to maintain the real-time load value of the jack at ki-g~ki+d between; In the unloading stage, the jack is automatically unloaded based on the unloading speed until the real-time load value of the jack is unloaded to the load control value corresponding to the level; After maintaining the load level for the second preset period of time, if the real-time load value of the jack decreases during the load holding period, the oil pump is controlled to perform a reloading operation; if the real-time load value of the jack increases during the load holding period, the oil pump is controlled to perform an unloading operation, so that the real-time load value of the jack is maintained at k i -e~k i +g between.

5. The anchor pull test control method according to claim 1, characterized in that: The method further comprises: The test status is monitored, and if the test status does not meet the preset status condition, the oil pump is controlled to stop working.

6. The anchor pull test control method according to claim 5, characterized in that: The test state includes real-time anchor displacement. If the test state does not meet the preset state condition, the oil pump is controlled to stop working, including: If the real-time anchor rod displacement is not less than the preset anchor rod displacement, the oil pump is controlled to stop loading and an alarm is issued.

7. The anchor pull test control method according to claim 5, characterized in that: The test state includes a maximum loading time. If the test state does not meet the preset state condition, the oil pump is controlled to stop working, including: If the longest loading time of this level is not less than the average loading time of this level, and the real-time load value of the jack is less than the load control value of this level, the oil pump will be controlled to stop loading and an alarm will be sounded.

8. The anchor pull test control method according to claim 5, characterized in that: The test state includes a maximum unloading time. If the test state does not meet the preset state conditions, the oil pump is controlled to stop working, including: If the longest unloading time of this stage is not less than the average unloading time of this stage, and the real-time load value of the jack is greater than the load control value of this stage, the oil pump is controlled to stop loading and an alarm is sounded.

9. The anchor pull test control method according to claim 1, characterized in that: The test state includes the displacement of the anchor rod and the real-time load value of the jack during the loading process. If the test state does not meet the preset state conditions, the oil pump is controlled to stop working, including: Acquire the real-time displacement of the anchor rod at this level, and generate the displacement change curve of this level based on the real-time displacement of the anchor rod at this level; If the slope of the displacement change curve of this level is greater than the preset slope, and the real-time load value of the jack is less than the preset load value, the oil pump is controlled to stop loading and an alarm is issued.

10. An anchor pull-out test control system, characterized in that: include: Host, integrated oil pump, wireless displacement sensor, jack, oil pipe, anchor rod, anchor, pressure plate and lithium battery, wherein the integrated oil pump, wireless displacement sensor and host are connected by wireless communication; The integrated oil pump has a built-in pressure sensor to obtain the oil circuit pressure value in real time and convert the real-time load value of the jack according to the jack rating curve; The wireless displacement sensor is installed at the upper end of the anchor rod body to obtain the anchor rod displacement data in real time; The host is built with the anchor pull-out test control method described in any one of claims 1 to 9, which is used to control the pressure and flow rate during the loading and unloading of the oil pump during the pull-out test, and to stop the test and alarm in abnormal situations.

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