Intelligent control method and device for cement consumption of high-pressure jet grouting pile

Abstract

The invention discloses an intelligent control method and device for the cement consumption of a high-pressure jet grouting pile, and relates to the technical field of building construction.The method comprises the steps that the cement grout pipeline pressure P, the grout spraying time T1, the drilling T2 and the drilling length L are obtained; the total guniting amount Q1 is calculated; the drilling speed V = L / T2 is calculated; shooting an overflow image of the slurry through a camera, and identifying an overflow amount Q2; the actual guniting amount Q3 in the pile is calculated according to the formula Q3 = Q1-Q2; calculating the amount q = Q3 / L of cement paste per linear meter; and comparing the cement slurry consumption per linear meter with the designed cement slurry consumption, if the deviation is less than 5%, not adjusting, and if the deviation is greater than 5%, regulating and controlling the drilling speed V until the deviation is less than 5%.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to an intelligent control method and device for cement dosage of high-pressure jet grouting piles. Background Art

[0002] In engineering construction, high-pressure jet grouting piles are often used to reinforce foundations and roadbeds, thereby increasing bearing capacity and reducing deformation. High-pressure jet grouting piles use a drilling rig to place the jet grouting pipe and nozzle drill at the designed elevation of the pile bottom. After the pre-configured slurry is passed through a high-pressure generating device to give the liquid flow huge energy, it is ejected at high speed from the nozzle on the side of the slurry pipe to form a highly energy-concentrated liquid flow. During the spraying process, the drill rod rotates and lifts at the same time, so that the slurry and the soil are fully mixed and mixed, forming a columnar consolidation body of a certain diameter in the soil, thereby reinforcing the foundation. It has the advantages of being economical and practical, easy to construct, and not polluting the environment, and is widely used in engineering.

[0003] The amount of cement slurry is the key to quality control of the high-pressure rotary jet pile body. Conventionally, it is estimated based on the cement consumption and the length of the pile body, which can easily lead to a large gap between the actual value and the theoretical value. Therefore, it is still difficult to accurately control the quality of the project.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the actual amount of cement slurry in high-pressure jet grouting piles cannot be accurately calculated, which makes it difficult to accurately control the quality of the project, and to provide a method and device for intelligently controlling the amount of cement slurry in high-pressure jet grouting piles; comprising

[0006] The first aspect of the present invention provides an intelligent control method for cement dosage of high-pressure jet grouting piles, comprising:

[0007] Obtain cement slurry pipeline pressure P, grouting time T1, drilling T2, and drilling length L;

[0008] Calculate the total shotcrete volume Q1; calculate the drilling speed V = L / T2;

[0009] Using a camera to capture an image of the slurry overflow and identify the overflow amount Q2;

[0010] Calculate the actual shotcrete volume in the pile Q3 = Q1-Q2;

[0011] Calculate the amount of cement slurry per linear meter q = Q3 / L;

[0012] Compare the cement slurry consumption per linear meter with the designed cement slurry consumption. If the deviation is less than 5%, no adjustment is required. If the deviation is greater than 5%, adjust the drilling speed V until the deviation is less than 5%.

[0013] In one embodiment of the present invention, a fence is provided at the periphery of the borehole opening, and a camera is used to capture an image of the slurry in the fence to identify the overflow amount Q2.

[0014] In one embodiment of the present invention, the inner wall of the enclosure is provided with a marking line arranged along the axial direction.

[0015] In one embodiment of the present invention, the enclosure is photographed after the rotary spraying process is implemented to obtain an actual image; the processing process of the actual image is: the actual image is converted into a grayscale image, and then extreme processing is performed based on a set grayscale threshold, so that the cement slurry part and the marking line part in the image become black and white, and the rising height of the cement slurry in the enclosure is determined based on the pixel area length S2 of the marking line part.

[0016] In one embodiment of the present invention, the enclosure is photographed before the rotary spraying process is implemented to obtain a contrast image, and the contrast image is processed by: converting the contrast image into a grayscale image, performing extremization processing based on a set grayscale threshold, so that the identification line part and the enclosure part in the image become black and white, and determining the length S1 of the pixel area of ​​the identification line part;

[0017] l 实际 = l 总 *S2 / S1, so the rising height of cement slurry h=l 总 -l 实际 .

[0018] The second aspect of the present invention provides an intelligent control device for cement dosage of high-pressure jet grouting piles, comprising a jet grouting drill, a pressure sensor, a central control console, a side gauge, a vertical gauge, a terminal, and a camera;

[0019] The pressure sensor is arranged in the pipeline at the outlet of the mud pump, and is used to detect the pressure of the cement slurry at the outlet of the mud pump;

[0020] The side position meter is arranged on the arm of the rotary jet drilling rig and is used to detect the drilling depth and drilling time of the drill rod;

[0021] The vertical meter is arranged on the arm of the rotary jet drilling rig and is used to detect the verticality of the drill rod;

[0022] A fence is set at the periphery of the drill hole;

[0023] The camera is arranged on the jet-jet drilling rig to photograph the overflow of cement slurry in the enclosure;

[0024] The central console is arranged on the jet-jet drilling rig and is electrically connected to the lateral position meter, the vertical meter and the pressure sensor, and is used to execute the method described above;

[0025] The terminal is connected to the central console for acquiring and displaying data from the central console.

[0026] Compared with the prior art, the technical effects achieved by the present invention are as follows:

[0027] The overflow volume Q2 can be accurately obtained, so that the actual shotcrete volume Q3 in the pile can be accurately known. Then the cement slurry consumption per linear meter can be calculated. The drilling speed V can be adjusted according to the deviation between the actual value and the design value, so as to control the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the device of the present invention.

[0029] Description of main reference numerals:

[0030] 1. Pressure sensor; 2. Center console; 3. Lateral position meter; 4. Vertical meter; 5. Terminal; 6. Fence; 7. Camera. DETAILED DESCRIPTION

[0031] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0032] The technical solution of the present invention is described below by specific embodiments. It should be understood that one or more steps mentioned in the present invention do not exclude the existence of other methods and steps before and after the combination step, or other methods and steps can be inserted between these explicitly mentioned steps. It should also be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. Unless otherwise specified, the numbering of each method step is only for the purpose of identifying each method step, and does not limit the order of arrangement of each method or limit the scope of implementation of the present invention. The change or adjustment of the relative relationship thereof can also be regarded as the scope of implementation of the present invention without substantial changes in the technical content.

[0033] The sources of the raw materials and instruments used in the examples are not particularly limited and can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0034] Example 1

[0035] This embodiment discloses an intelligent control method for cement dosage of high-pressure jet grouting piles, which is characterized by comprising:

[0036] Obtain cement slurry pipeline pressure P, grouting time T1, drilling T2, and drilling length L;

[0037] Calculate the total shotcrete volume Q1; calculate the drilling speed V = L / T2;

[0038] Using a camera to capture an image of the slurry overflow and identify the overflow amount Q2;

[0039] Calculate the actual shotcrete volume in the pile Q3 = Q1-Q2;

[0040] Calculate the amount of cement slurry per linear meter q = Q3 / L;

[0041] Compare the cement slurry consumption per linear meter with the designed cement slurry consumption. If the deviation is less than 5%, no adjustment is required. If the deviation is greater than 5%, adjust the drilling speed V until the deviation is less than 5%.

[0042] The calculation of the total spraying volume Q1 is that after obtaining the cement slurry pipeline pressure P, the flow rate of the nozzle used to spray the cement slurry can be known, and then Q1 can be obtained by multiplying it by the spraying time T1.

[0043] The specific process of "taking an image of the slurry overflow by using a camera and identifying the overflow amount Q2" is: a fence is set around the borehole, and the fence is annular. The inner wall of the fence is provided with a marking line set along the axial direction. The camera is used to take an image of the slurry in the fence to identify the overflow amount Q2. The identification process is:

[0044] Before the rotary spraying process is implemented, the enclosure is photographed to obtain a comparison image. The comparison image is processed by: converting the comparison image into a grayscale image, performing extremization processing based on a set grayscale threshold, so that the identification line part and the enclosure part in the image become black and white, and determining the length S1 of the pixel area of ​​the identification line part;

[0045] After the rotary spraying process is implemented, the enclosure is photographed to obtain an actual image; the processing process of the actual image is: the actual image is converted into a grayscale image, and then extreme processing is performed based on the set grayscale threshold, so that the cement slurry part and the marking line part in the image become black and white, and the rising height of the cement slurry in the enclosure is determined based on the pixel area length S2 of the marking line part.

[0046] The total length of the known identification line I 总 , so the length of the remaining marking line after the cement slurry overflows is l 实际 = l 总 *S2 / S1, so the rising height of cement slurry h=l 总 -l 实际 .

[0047] On this basis, the area of ​​the enclosure is known, so the overflow amount Q2 of cement slurry in the enclosure can be directly calculated.

[0048] The advantages of this solution are: the overflow volume Q2 can be accurately obtained, so that the actual shotcrete volume Q3 in the pile can be accurately known. Then the cement slurry consumption per linear meter can be calculated. The drilling speed V can be adjusted according to the deviation between the actual value and the design value, so as to control the construction quality.

[0049] Example 2

[0050] The present embodiment discloses an intelligent control device for cement dosage of high-pressure jet grouting piles, including a jet grouting drill, which is a prior art product and can implement the manufacturing process of high-pressure jet grouting piles, and also includes a pressure sensor 1, a central control console 2, a side position meter 3, a vertical meter 4, a terminal 5, and a camera 7;

[0051] The pressure sensor 1 is arranged in the pipeline at the outlet of the mud pump, and is used to detect the pressure of the cement slurry at the outlet of the mud pump;

[0052] The side position meter 3 is arranged on the arm of the rotary jet drilling rig and is used to detect the drilling depth and drilling time of the drill rod;

[0053] The vertical meter 4 is arranged on the arm of the rotary jet drilling rig and is used to detect the verticality of the drill rod;

[0054] A barrier 6 is arranged at the periphery of the drill hole;

[0055] The camera 7 is arranged on the jet-jet drilling rig to photograph the overflow of cement slurry in the enclosure 6;

[0056] The central control console 2 is arranged on the jet grouting drilling rig, and is electrically connected to the lateral position gauge 3, the vertical gauge 4, and the pressure sensor 1, and is used to execute the method in the above-mentioned embodiment 1, and is also used to control the operation of the machine arm and the grouting time. The process of controlling and executing the high-pressure jet grouting pile is not described in detail here.

[0057] The terminal 5 is connected to the central console 2 for communication and is used for acquiring data from the central console 2 and displaying the data.

[0058] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An intelligent control method for cement dosage of high-pressure jet grouting piles, characterized in that: include: Obtain cement slurry pipeline pressure P, grouting time T1, drilling T2, and drilling length L; Calculate the total shotcrete volume Q1; calculate the drilling speed V = L / T2; Using a camera to capture an image of the slurry overflow and identify the overflow amount Q2; Calculate the actual shotcrete volume in the pile Q3 = Q1-Q2; Calculate the amount of cement slurry per linear meter q = Q3 / L; Compare the cement slurry consumption per linear meter with the designed cement slurry consumption. If the deviation is less than 5%, no adjustment is required. If the deviation is greater than 5%, adjust the drilling speed V until the deviation is less than 5%.

2. The intelligent control method for cement dosage of high-pressure jet grouting piles according to claim 1 is characterized in that: A fence is set up around the borehole mouth. The image of the slurry in the fence is captured by a camera to identify the overflow amount Q2.

3. The intelligent control method for cement dosage of high-pressure jet grouting piles according to claim 2 is characterized in that: The inner wall of the enclosure is provided with a marking line arranged along the axial direction.

4. The intelligent control method for cement dosage of high-pressure jet grouting piles according to claim 3 is characterized in that: After the rotary spraying process is implemented, the enclosure is photographed to obtain an actual image; the processing process of the actual image is: the actual image is converted into a grayscale image, and then extreme processing is performed based on the set grayscale threshold, so that the cement slurry part and the marking line part in the image become black and white, and the rising height of the cement slurry in the enclosure is determined based on the pixel area length S2 of the marking line part.

5. The intelligent control method for cement dosage of high-pressure jet grouting piles according to claim 4 is characterized in that: Before the rotary spraying process is implemented, the enclosure is photographed to obtain a comparison image. The comparison image is processed by: converting the comparison image into a grayscale image, performing extremization processing based on a set grayscale threshold, so that the identification line part and the enclosure part in the image become black and white, and determining the length S1 of the pixel area of ​​the identification line part; l 实际 = l 总 *S2 / S1, so the rising height of cement slurry h=l 总 -l 实际 .

6. An intelligent control device for cement dosage of high-pressure jet grouting piles, characterized in that: It includes a jet-jet drilling rig, a pressure sensor, a central console, a side gauge, a vertical gauge, a terminal, and a camera; The pressure sensor is arranged in the pipeline at the outlet of the mud pump, and is used to detect the pressure of the cement slurry at the outlet of the mud pump; The side position meter is arranged on the arm of the rotary jet drilling rig and is used to detect the drilling depth and drilling time of the drill rod; The vertical meter is arranged on the arm of the rotary jet drilling rig and is used to detect the verticality of the drill rod; A fence is set at the periphery of the drill hole; The camera is arranged on the jet-jet drilling rig to photograph the overflow of cement slurry in the enclosure; The central console is arranged on the jet-jet drilling rig and is electrically connected to the lateral position gauge, the vertical gauge, and the pressure sensor, and is used to execute the method according to claim 5; The terminal is connected to the central console for acquiring and displaying data from the central console.

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