CN110186792B - Rapid rock mass strength testing device for double-shield TBM tunnel face - Google Patents
Rapid rock mass strength testing device for double-shield TBM tunnel face Download PDFInfo
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- CN110186792B CN110186792B CN201910535713.0A CN201910535713A CN110186792B CN 110186792 B CN110186792 B CN 110186792B CN 201910535713 A CN201910535713 A CN 201910535713A CN 110186792 B CN110186792 B CN 110186792B
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- 238000012360 testing method Methods 0.000 title claims abstract description 91
- 239000011435 rock Substances 0.000 title claims abstract description 52
- 230000005641 tunneling Effects 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 15
- 239000003086 colorant Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims 1
- 241000251131 Sphyrna Species 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract description 2
- 238000007619 statistical method Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
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- Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application discloses a rapid testing device for rock mass strength of a tunnel face of a double-shield TBM (Tunnel boring machine), which belongs to the technical field of tunnel geological testing and comprises a target system, a testing system and a control system, wherein the target system is arranged on a cutter head and comprises an ejector capable of ejecting targets to the front of the cutter head, the testing system comprises a plurality of rebound instruments with hammerheads towards the front of the cutter head, the rebound instruments can rotate along with the cutter head so as to test the strength of a plurality of points on the tunnel face, and the control system is used for controlling the ejector to eject targets and the detection actions of the rebound instruments. The device is utilized to rotate the cutterhead in a non-tunneling period for multipoint test to obtain a series of resiliometer strength test data of the whole face rock mass, and a series of resiliometer data are utilized for statistical analysis to obtain related achievements such as a face rock mass strength distribution cloud picture and partition characteristics, so that the distribution change characteristics of the face rock mass strength are comprehensively known while the face rock mass strength characteristics are rapidly and accurately obtained.
Description
Technical Field
The application relates to the technical field of tunnel geological testing, in particular to a rock mass strength testing device aiming at the condition that a rock mass of a tunnel face of a double-shield TBM construction tunnel is blocked by a cutter head.
Background
Along with the progress of science and technology, the application of the double-shield TBM tunnel construction technology in actual engineering is more and more extensive. However, the cutter disc and the shield body block in the construction process of the double-shield TBM, so that the rock mass strength of the face is difficult to sample and test, and great trouble is brought to geological work in the construction period.
At present, the traditional method for testing the strength of the rock mass of the tunnel face of the double-shield TBM construction is to sample a fresh and massive slag sample at a belt conveyor or a slag yard and then test the indoor strength in a laboratory. The drawbacks of this approach are mainly manifested in the following ways:
the slag sample is poor in representativeness, and the concrete exposed position of the slag sample cannot be restored because the slag sample of a slag field or a belt conveyor can only reflect the rock mass characteristics of the latest excavation period. Moreover, for tunnels with complex rock mass characteristic changes, the rock mass at different positions on the tunnel face has large character differences.
The slag sample has large disturbance and poor actual degree. Because TBM tunneling hole slag is subjected to cutter head cutting, crushing and collision in the conveying process, rock mass disturbance is large, and the strength of the TBM tunneling hole slag is different from that of an undisturbed rock mass to a certain extent.
The number of test groups is limited, and the time consumption is high. The sampling is carried out in an indoor test, the number of sampling groups is limited at each time, and the large-scale sampling manpower and material resources are consumed greatly. Moreover, if no laboratory exists on site, the process of taking samples and sending the samples to the laboratory for strength testing is long, and test results cannot be obtained in time.
Disclosure of Invention
In order to overcome the defects in the prior TBM tunnel construction process in the rock mass strength test of the face, the application aims to solve the technical problems that: the device and the method for testing the rock mass strength of the tunnel face can be used for quickly and completely obtaining the rock mass strength of the tunnel face.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a quick testing arrangement of dual shield TBM face rock mass intensity, includes target system, test system and the control system of installing on the blade disc, target system is including the sprayer that can spray the target to the blade disc the place ahead, test system includes a plurality of tups towards the resiliometer in blade disc the place ahead, thereby a plurality of resiliometers can rotate along with the blade disc and test the intensity of a plurality of points on the tunnel face, control system is used for controlling the sprayer and sprays the detection action of target and resiliometer.
Further, the sprayer of the target system is a paint sprayer that can spray different colors of waterproof paint.
Further, the resiliometer is a cloud intelligent electronic resiliometer with data recording and uploading cloud functions.
Further, the ejector and the resiliometer are arranged on the same radial direction of the cutter head, and the resiliometers are uniformly arranged at intervals on the radius or the diameter length of the cutter head.
Further, an equipment placing cabin parallel to the axis of the cutterhead is arranged on the cutterhead, the ejector and the resiliometer are arranged in the equipment placing cabin, the control system is located at the rear of the cutterhead, and the control system is in telecommunication connection with the ejector and the resiliometer.
Furthermore, the ejector and the rebound device are both fixed in the equipment placing cabin through anti-abrasion sealing cushion blocks, a cabin door is arranged at the front opening of the equipment placing cabin, and the opening and closing of the cabin door are controlled by the control system.
Further, an electro-hydraulic push rod and a sliding rail are further arranged in the equipment placing cabin for placing the resiliometer, the electro-hydraulic push rod is fixedly connected with the rear half section of the equipment placing cabin, the sliding rail is arranged on the front half section of the equipment placing cabin, the resiliometer is slidably arranged on the sliding rail, and the push rod of the electro-hydraulic push rod is connected with the tail of the resiliometer.
Further, the device also comprises a device integration box, wherein the device integration box is fixed in the device placement cabin through an anti-abrasion sealing cushion block, and the electro-hydraulic push rod, the sliding rail and the rebound instrument are arranged in the device integration box.
Further, the control system comprises an equipment protection box and a control switch positioned in the equipment protection box, wherein the control switch controls the ejector, the resiliometer, the electrohydraulic push rod and the cabin door to work through telecommunication.
A method for testing rock mass by adopting a double-shield TBM tunnel face rock mass strength rapid testing device comprises the following steps:
a. determining the number of resiliometers, the arrangement interval and the number of test points according to the test precision requirements according to the excavation diameter of a concrete cutterhead of the double-shield TBM;
b. when the cutter head structure is combined with the design and the manufacture of the cutter head, an equipment placement cabin is manufactured based on the principle that the whole structure and the strength of the cutter head are not damaged, a circuit box and an equipment protection box are arranged behind the cutter head, and all the equipment are installed and connected;
c. in the tunneling process, at any moment when a rock mass of a tunnel face needs to be photographed, firstly, tunneling is stopped, and then water spraying, cooling and dust removing are carried out on the tunnel face for multiple times by using equipment of a tunneling machine;
d. after the cooling and dust removing operation in front of the cutterhead is finished, calculating interval angles for stopping testing when the cutterhead rotates correspondingly according to the number of the determined test points, determining a starting point position, performing intensity test of the resiliometer when the cutterhead rotates by corresponding interval angles each time until the cutterhead rotates for one circle, and simultaneously, respectively spraying marks with different colors when the sprayer rotates to the upper, lower, left and right positions;
e. after the test is finished, the coordinates of the periphery and the center position of the cutter head are measured by using a TBM self-measuring device, test data of the rebound instrument are downloaded from the cloud, the coordinate positions of all the test points are calculated, and a graph processing tool is used for forming a rock mass intensity distribution cloud graph of the face in combination with the test intensity value.
The beneficial effects of the application are as follows: the device is provided with the rebound tester testing device in advance on the basis of not damaging the whole structure and the strength of the cutterhead, rotates the cutterhead in a non-tunneling period to perform multi-point test to obtain a series of rebound tester strength test data of the whole face rock mass, determines the face rock mass strength according to the regression relation between the rebound tester strength test data and the traditional strength test result, performs statistical analysis by using a series of rebound tester data, obtains related results such as a face rock mass strength distribution cloud image and partition characteristics, and comprehensively knows the distribution change characteristics of the face rock mass strength while rapidly and accurately obtaining the face rock mass strength characteristics.
Drawings
Fig. 1 is a schematic diagram of the structure of the present application.
FIG. 2 is a schematic diagram of a test system according to the present application.
FIG. 3 is a bit map of the face strength test points of the present application.
FIG. 4 is a cloud of intensity test value distributions according to the present application.
The device is characterized by comprising a 1-cutter head, a 2-sprayer, a 3-rebound instrument, a 4-wear-resistant sealing cushion block, a 5-electrohydraulic push rod, a 6-sliding rail, a 7-equipment integrated box, an 8-equipment protection box, a 9-control switch, an 11-equipment placing cabin, a 12-cabin door, 31-rollers, 32-connecting members, 51-fixing members and 52-binding posts.
Detailed Description
The application is further described below with reference to the accompanying drawings.
As shown in fig. 1, the rapid testing device for rock mass strength of a double-shield tunnel face of the application comprises a target system, a testing system and a control system, wherein the target system is arranged on a cutter head, the target system comprises an ejector 2 capable of ejecting targets to the front of the cutter head 1, the testing system comprises a plurality of rebound instruments 3 with hammerheads towards the front of the cutter head 1, the rebound instruments 3 can rotate along with the cutter head 1 so as to test the strength of a plurality of points on the tunnel face, and the control system is used for controlling the ejector 2 to eject targets and the detection actions of the rebound instruments 3.
The target system is used for setting targets on the surface of the rock mass and providing azimuth reference and image control point coordinate information for later image processing. It is generally necessary to set different targets in the up, down, left and right directions to distinguish, so the sprayer 2 of the target system can adopt pigment sprayers, and the pigment sprayers can spray waterproof pigments with different colors, thereby playing a role in providing targets on the rock mass of the face. The control system may control the operation of the injector 2 by switching on the power supply or sending an electrical signal.
The function of the test system is to test the rock mass strength of a certain point on the face, the adopted tool is the resiliometer 3, the basic principle of the resiliometer 3 is that the hammer head is driven by the spring to strike the rock mass, the rock mass absorbs part of energy, the other part of energy is converted into rebound kinetic energy of the hammer head, and the strength index of the point is obtained after conversion. In order to grasp the strength condition of the whole face rock mass, a plurality of rebound apparatuses 3 are required to be arranged, and the strength test of a plurality of points of the face rock mass is realized through the rotation of the cutterhead 1, so that the strength condition of the whole face rock mass is roughly judged. The control system can control the work of the resiliometer 3 by switching on a power supply or sending an electric signal. In order to facilitate the subsequent collection of test data, the resiliometer 3 preferably adopts a cloud intelligent electronic resiliometer with data recording and cloud uploading functions.
In order to achieve a better test effect, a more critical step is to reasonably plan the distribution condition of test points on a face, and the purpose is to obtain test points which are distributed uniformly as many as possible in a shortest time, and the application adopts the following steps: the ejector 2 and the resiliometer 3 are arranged on the same radial direction of the cutterhead 1, and the resiliometers 3 are uniformly arranged at intervals on the radius or the diameter length of the cutterhead 1. The injector 2 may be arranged at any position in the radial direction, but is preferably arranged at the outermost end of the cutterhead 1, which is more advantageous for positioning. If the rebound devices 3 are uniformly distributed on the radius length, the cutter head 1 can achieve the full coverage uniform test of the tunnel face only by rotating 360 degrees; if the resiliometer 3 is arranged on the diameter length, the number of the resiliometers 3 is doubled, but the cutter head 1 can finish the test by rotating 180 degrees, and the resiliometer 3 is preferably arranged on the radius length by comprehensively considering the factors such as cost.
When the ejector and the resiliometer 3 are specifically installed, the device placement cabin 11 parallel to the axis of the cutter disc is arranged on the cutter disc 1, then the ejector 2 and the resiliometer 3 are arranged in the device placement cabin 11, the control system is arranged at the rear of the cutter disc 1, and the control system is in telecommunication connection with the ejector 2 and the resiliometer 3, and can be in wired or wireless connection.
Because TBM is in the tunneling process, cutter head 1 position vibration is great, and the dust is more, in order to guarantee equipment stability of laying, will sprayer 2 and resiliometer 3 are all fixed in equipment and lay cabin 11 through abrasionproof seal cushion 4, are equipped with hatch door 12 in the front opening part of equipment and lay cabin 11, the switching of hatch door 12 is also controlled by control system. The cabin door 12 is closed in the normal tunneling process, the cabin door 12 is opened when the rock mass strength test is needed, and the tested cabin door 12 is automatically closed again, so that equipment in the equipment placing cabin 11 is protected.
In the actual testing process, because the cutter head 1 is a certain distance away from the rock mass of the face, the situation that the hammer head of the rebound instrument 3 cannot be contacted with the rock mass can occur, so the rebound instrument 3 is further improved, an electro-hydraulic push rod 5 and a slide rail 6 are further arranged in the equipment placing cabin 11 for placing the rebound instrument 3, as shown in fig. 2, the electro-hydraulic push rod 5 is fixedly connected with the rear half section of the equipment placing cabin 11 through a fixing member 51, the electro-hydraulic push rod 5 is connected with an external power supply through a binding post 52, the slide rail 6 is arranged on the front half section of the equipment placing cabin 11, the rebound instrument 3 is slidably arranged on the slide rail 6 through a roller 31, and the push rod of the electro-hydraulic push rod 5 is connected with the tail of the rebound instrument 3, so that the measurement accuracy of the rebound instrument 3 is ensured, and the electro-hydraulic push rod 5 and the electro-hydraulic push rod are connected through a connecting member 32 in large-area contact. In the TBM tunneling process, the resiliometer 3 is retracted into the equipment placing cabin 11 under the action of the electro-hydraulic push rod 5, when the strength test is required, the push rod of the electro-hydraulic push rod 5 firstly extends out to push the resiliometer 3 to slide 6 out of the equipment placing cabin 11 along the sliding rail, after the pre-determined position is reached, the strength test is carried out by utilizing the resiliometer 3, and after the test is finished, the equipment placing cabin 11 is retracted.
Because the resiliometer 3 is required to move along the sliding rail, in order to ensure the sealing performance, an equipment integrated box 7 is further added, the equipment integrated box 7 is fixed in the equipment placing cabin 11 through the anti-abrasion sealing cushion block 4, and the electro-hydraulic push rod 5, the sliding rail 6 and the resiliometer 3 are arranged in the equipment integrated box 7.
The control system comprises an equipment protection box 8 and a control switch 9 positioned in the equipment protection box 8, wherein the control switch 9 controls the ejector 2, the resiliometer 3, the electro-hydraulic push rod 5 and the cabin door 12 to work through telecommunication.
The method for testing the rock mass strength of the face by using the device mainly comprises the following steps:
a. determining the number of resiliometers 3, the arrangement interval and the number of test points according to the test precision requirements according to the excavation diameter of a concrete cutterhead of the double-shield TBM;
b. when the cutter head 1 is designed and manufactured by combining the cutter head structure, a device placement cabin 11 is manufactured based on the principle that the whole structure and the strength of the cutter head 1 are not damaged, a circuit box and a device protection box 8 are arranged behind the cutter head 1, and all devices are installed and connected;
c. in the tunneling process, at any moment when a rock mass of a tunnel face needs to be photographed, firstly, tunneling is stopped, and then water spraying, cooling and dust removing are carried out on the tunnel face for multiple times by using equipment of a tunneling machine;
d. after the cooling and dedusting work in front of the cutterhead is finished, calculating interval angles for stopping testing when the cutterhead rotates correspondingly according to the number of the determined test points, determining a starting point position, performing intensity test of the resiliometer 3 when the cutterhead 1 rotates by the corresponding interval angles each time until the cutterhead 1 rotates for one circle, and simultaneously, respectively spraying marks with different colors when the sprayer 2 rotates to the upper, lower, left and right positions;
e. after the test is finished, the coordinates of the periphery and the center position of the cutter head are measured by using a TBM self-measuring device, test data of the resiliometer 3 are downloaded from the cloud, the coordinate positions of all the test points are calculated, and a graph processing tool is used for forming a rock mass intensity distribution cloud graph of the face in combination with the test intensity value.
And as shown in fig. 3, the intensity test points obtained after the cutterhead rotates one circle are then utilized to form a rock mass intensity distribution cloud chart of the face according to the coordinate positions and intensity values of each test point by utilizing sufer software, and as shown in fig. 4, the intensity condition of the whole face can be intuitively displayed by utilizing the distribution cloud chart, so that engineering personnel can comprehensively know the distribution change characteristics of the rock mass intensity, and technical support is provided for subsequent engineering.
Claims (4)
1. Quick testing arrangement of two shield TBM tunnel face rock mass intensity, characterized by: the system comprises a target system, a test system and a control system, wherein the target system is arranged on a cutterhead (1), the target system comprises an ejector (2) capable of ejecting targets to the front of the cutterhead (1), the test system comprises a plurality of rebound meters (3) with hammers towards the front of the cutterhead (1), the rebound meters (3) can rotate along with the cutterhead (1) so as to test the intensity of a plurality of points on the tunnel face, and the control system is used for controlling the ejector (2) to eject targets and the detection action of the rebound meters (3); the utility model discloses a device for preventing and controlling the vibration of a car, which comprises a cutter head (1), a target system, a control system, a pusher and a pusher, wherein an ejector (2) of the target system is a pigment ejector, the pigment ejector can eject waterproof pigments with different colors, a rebound instrument (3) is a cloud intelligent electronic rebound instrument with data recording and uploading cloud functions, the ejector (2) and the rebound instrument (3) are all arranged on the same radial direction of the cutter head (1), a plurality of rebound instruments (3) are uniformly arranged at intervals on the radius or the radial length of the cutter head (1), a device placing cabin (11) parallel to the axis of the cutter head is arranged on the cutter head (1), the ejector (2) and the rebound instrument (3) are all arranged in the device placing cabin (11), the control system is positioned behind the cutter head (1), the control system is in telecommunication connection with the ejector (2) and the rebound instrument (3), the ejector (2) and the rebound instrument (3) are all fixed in the device placing cabin (11) through electrohydraulic wear-proof sealing cushion blocks (4), a front opening cabin door (12) of the device placing cabin (11) is arranged on the front opening cabin door of the device (11), the control system is also provided with a push rod (5) and a push rod (5) is arranged in the device placing cabin (5) and a push rail (5) is fixedly arranged in the front cabin (5), the resiliometer (3) is slidably arranged on the sliding rail (6), and the push rod of the electro-hydraulic push rod (5) is connected with the tail part of the resiliometer (3).
2. The rapid testing device for the rock mass strength of the tunnel face of the double-shield TBM according to claim 1, wherein the rapid testing device is characterized in that: still include equipment integration box (7), equipment integration box (7) are fixed in equipment placing cabin (11) through abrasionproof sealed cushion (4), electrohydraulic push rod (5), slide rail (6) and resiliometer (3) all set up in equipment integration box (7).
3. The rapid testing device for the rock mass strength of the tunnel face of the double-shield TBM according to claim 1, wherein the rapid testing device is characterized in that: the control system comprises an equipment protection box (8) and a control switch (9) positioned in the equipment protection box (8), wherein the control switch (9) controls the ejector (2), the resiliometer (3), the electro-hydraulic push rod (5) and the cabin door (12) to work through telecommunication.
4. A method of testing a dual shield TBM face rock mass strength rapid testing apparatus as claimed in claim 3, comprising the steps of:
a. determining the number of resiliometers (3), the arrangement space and the number of test points according to the test precision requirements according to the excavation diameter of a concrete cutterhead of the double-shield TBM;
b. when the cutter head structure is combined with the design and the manufacture of the cutter head (1), an equipment placing cabin (11) is manufactured based on the principle that the integral structure and the strength of the cutter head (1) are not damaged, a circuit box and an equipment protection box (8) are arranged behind the cutter head (1), and all the equipment are installed and connected;
c. in the tunneling process, at any moment when a rock mass of a tunnel face needs to be photographed, firstly, tunneling is stopped, and then water spraying, cooling and dust removing are carried out on the tunnel face for multiple times by using equipment of a tunneling machine;
d. after the cooling and dedusting work in front of the cutterhead is finished, calculating interval angles for stopping testing when the cutterhead rotates correspondingly according to the number of the determined test points, determining a starting point position, testing the strength of the resiliometer (3) when the cutterhead (1) rotates by the corresponding interval angles each time until the cutterhead (1) rotates for one circle, and simultaneously, respectively spraying marks with different colors when the sprayer (2) rotates to the upper, lower, left and right positions;
e. after the test is finished, the coordinates of the periphery and the center position of the cutter head are measured by utilizing a TBM self-measuring device, test data of the resiliometer (3) are downloaded from the cloud end, the coordinate positions of all the test points are calculated, and a graph processing tool is utilized to form a rock mass intensity distribution cloud graph of the face in combination with the test intensity value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910535713.0A CN110186792B (en) | 2019-06-20 | 2019-06-20 | Rapid rock mass strength testing device for double-shield TBM tunnel face |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910535713.0A CN110186792B (en) | 2019-06-20 | 2019-06-20 | Rapid rock mass strength testing device for double-shield TBM tunnel face |
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| CN110186792A CN110186792A (en) | 2019-08-30 |
| CN110186792B true CN110186792B (en) | 2023-12-05 |
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| CN112765874B (en) * | 2020-12-31 | 2023-09-26 | 盾构及掘进技术国家重点实验室 | Method and device for acquiring surrounding rock parameters applicable to open TBM tunnel |
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