CN109799144B - Rock-soil layer in-situ lateral pressure testing device and method - Google Patents
Rock-soil layer in-situ lateral pressure testing device and method Download PDFInfo
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- CN109799144B CN109799144B CN201910174863.3A CN201910174863A CN109799144B CN 109799144 B CN109799144 B CN 109799144B CN 201910174863 A CN201910174863 A CN 201910174863A CN 109799144 B CN109799144 B CN 109799144B
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Abstract
The invention provides a rock-soil layer in-situ side pressure testing device and a method, wherein the testing device comprises a ground information processing control device, a test control data acquisition processor and a test control circuit board; the ground information processing control device is in communication connection with the test control data acquisition processor; the test control data acquisition processor is electrically connected with the test control circuit board; the test control circuit board and the test control data acquisition processor are respectively and electrically connected with the test unit of the bypass transformer; the ground information processing control device is used for acquiring the test data of the bypass transformer, processing the test data and issuing a test control instruction to the test control data acquisition processor; the test control data acquisition processor is used for receiving the test data of the test unit and the test control instruction of the ground information processing control device and transmitting the test data and the test control instruction to the ground information processing control device; the test unit is arranged in the drill hole and used for collecting test data of the rock-soil layer; by adopting the scheme, the structure of the testing device can be simplified.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering lateral pressure testing, and particularly relates to a device and a method for testing in-situ lateral pressure of a geotechnical layer.
Background
At present, the foundation construction is greatly developed, the complexity and difficulty coefficient of the construction are gradually increased, the requirement on the foundation is higher and higher, and the guarantee of the reality, accuracy and reliability of the mechanical data of the foundation soil is a more urgent problem in the current geotechnical engineering investigation technical field; an effective way to solve this problem is to develop in situ testing techniques for rock and soil.
The in-situ side pressure testing device is used for in-situ measuring the horizontal initial pressure of a soil layer
) Pressure of plastic contact (C)
) Ultimate pressure (
) And parapressure modulus: (
) (ii) a And using the measured data to calculate the in-situ horizontal stress of the soil layer by analysis (
) Shear strength index (C)
) Deformation data (a)
) Horizontal consolidation coefficient (
) And the horizontal bed coefficient (K).
The existing in-situ side pressure testing device generally comprises three parts, namely a soil side pressure device, a power source control system and a pipeline system, wherein:
first, bypass pressure device: the pressure bypass device is a device for directly applying pressure to the hole wall soil (rock) body of the underground drill hole; during testing, the pressure bypass device is placed to a stratum part to be tested along a drill hole, and a ground air power source presses a liquid medium (water or oil) into the pressure bypass device through a middle pipeline, so that the pressure bypass device expands in a cylindrical shape along the radial direction under the action of the liquid pressure medium; the expansion pressure acts on the foundation soil (rock) body, the pressure exerted by the power source and the volume of the liquid pressed into the rubber film are measured, and the pressure and deformation data of the foundation soil can be calculated;
second, power source control system: the power source is positioned on the earth surface, a high-pressure nitrogen pressure source is generally adopted, an inflator or an air compressor can also be adopted to compress the air pressure source, and the function of the power source is to apply pressure to a pressure medium (water or oil); the control system is used for controlling the application of pressure and displaying the pressure and the input liquid volume;
thirdly, a pipeline system: the pipeline system is used for conveying pressure medium on the ground into the pressure bypass device in the drill hole.
The existing in-situ pressure bypass test device has the following defects:
firstly, the device is divided into an upper part and a lower part; the ground is a power source, the underground is a side pressure tester, the power source and the side pressure device are connected by adopting a liquid conveying pipeline to form a measuring device of a loop, the measuring device is large and dispersive in size, complex in manual operation and difficult to trace manually recorded data;
secondly, the test data is obtained by reading instrument display and artificial theory calculation of the ground device, and certain deviation exists between the instrument display and artificial theory calculation data and the actual data due to the fact that the ground device is far away from the underground test position;
thirdly, a pipeline for transmitting power consists of a plurality of hoses, and the pipeline needs to be placed into a drill hole along the drill hole during testing; due to the fact that the diameter of the drilled hole is small, objects such as a drill rod and the like are arranged in the drilled hole, the difficulty in laying the pipelines is large, and working efficiency is low.
Based on the technical problems in the rock-soil in-situ test, no related solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
Disclosure of Invention
The invention aims to provide a rock-soil layer in-situ lateral pressure testing device and method aiming at overcoming the defects in the prior art, and aims to solve the problems that the existing rock-soil layer in-situ lateral pressure testing device is large and dispersed in size, complex in manual operation and difficult in data tracing due to manual recording.
The invention provides a rock-soil layer in-situ lateral pressure testing device, which comprises a ground information processing control device, a test control data acquisition processor and a test control circuit board, wherein the ground information processing control device is used for acquiring test control data; the ground information processing control device is in communication connection with the test control data acquisition processor; the test control data acquisition processor is electrically connected with the test control circuit board; the test control circuit board and the test control data acquisition processor are respectively and electrically connected with the test unit of the bypass transformer; the ground information processing control device is used for acquiring the test data of the bypass transformer, processing the test data and issuing a test process control instruction to the test control data acquisition processor; the test control data acquisition processor is used for receiving the test data of the test unit and the test process control instruction of the ground information processing control device and transmitting the test data and the test process control instruction to the ground information processing control device; the test unit is arranged in the drill hole and used for collecting test data of the rock-soil layer.
Further, the test unit comprises an electric hydraulic pump, an electromagnetic directional valve, a one-way sequence valve and a pressure PDI controller; the electric hydraulic pump, the electromagnetic directional valve, the one-way sequence valve and the pressure PDI controller are respectively and electrically connected with the test control circuit board; the electric hydraulic pump is used for providing hydraulic pressure power for the test; the electromagnetic directional valve is used for guiding the flow direction of system liquid; the one-way sequence valve is used for controlling the flow direction of system liquid; the pressure PDI controller is used for controlling the multistage pressure values and the pressurizing duration of the liquid in the measuring cavity, the bypass upper protecting cavity and the bypass lower protecting cavity; and the test control circuit board is used for distributing electric control signal wires of all the components of the test unit and connecting the power supply wires.
Further, the test unit comprises an electronic liquid flowmeter, a test part bare hole pressure sensor and a measurement cavity pressure sensor; the electronic liquid flowmeter, the pressure sensor of the bare hole of the testing part and the pressure sensor in the measuring cavity are respectively and electrically connected with the testing control data acquisition processor; the electronic liquid flow meter is used for measuring and recording the volume of liquid flowing into the measuring cavity; the pressure sensor of the bare hole of the testing part is used for measuring and recording the pressure of the external space of the side pressure testing cavity; the measuring chamber pressure sensor is used to measure and record the pressure in the space inside the measuring chamber.
Further, the pressure bypass device is a split type pressure bypass device; the split type pressure bypass device comprises a split type electromechanical hydraulic power source ground device, a pressure bypass device joint cabin and a pressure bypass device body; the bypass pressure device joint cabin and the bypass pressure device body are arranged in the drill hole; the split machine electrohydraulic power source ground device is arranged on the ground and is communicated with the by-pass transformer joint cabin and the by-pass transformer body through a liquid medium conduit; the split machine electrohydraulic power source ground device conveys lateral pressure liquid to the lateral pressure device body through a liquid medium conduit and a lateral pressure device joint cabin; the test unit is arranged in the split machine electro-hydraulic power source ground device.
Furthermore, the split machine electrohydraulic power source ground device is in communication connection with the ground information processing control device through a data communication interface; the data communication interface comprises USB serial port modules which are electrically connected through a lead.
Furthermore, the pressure bypass device is an integrated pressure bypass device; the integrated pressure-bypass device is arranged in the drill hole and is in communication connection with the ground information processing control device through the wireless data transmission module.
Further, the integrated pressure bypass device comprises an electro-hydraulic power source in-hole device; the electro-hydraulic power source hole device comprises a signal transmitter, a liquid medium cabin, a power cabin, a data acquisition cabin, an electro-hydraulic power cabin, a control valve cabin, a bypass pressure upper protection cavity, a bypass pressure test cavity and a bypass pressure lower protection cavity; the signal transmitter is used for installing a wireless communication module and a transmitting antenna and realizing communication between the in-hole device of the electro-hydraulic power source and the ground information processing control device; the liquid medium cabin is used for storing and supplying liquid used by the system; the power supply cabin is used for installing a battery used by the system; the data acquisition cabin is used for installing a test control data acquisition processor; the electro-hydraulic power cabin is used for installing an electric hydraulic pump assembly; the control valve cabin is used for installing a PID control valve assembly; the side pressing upper protection cavity, the side pressing lower protection cavity and the side pressing test cavity are pressure executing components for in-situ side pressing test of the rock-soil layer.
Furthermore, the bypass transformer comprises an electro-hydraulic power source and a digital information measuring module; the electrohydraulic power source is used for providing liquid medium pressure for the in-situ side pressure test of the rock-soil layer; the digital information measuring module is used for measuring and recording the side pressure test data, and the digital information measuring module converts an analog or pulse signal obtained by the measurement of the sensor into a digital signal which can be identified by the test control data acquisition processor and transmits the digital signal to the ground information processing control device through the test control data acquisition processor.
Furthermore, the ground information processing control device comprises a CPU central controller, a data acquisition and storage module, a hydraulic control unit, a data communication module and a satellite positioning module.
Correspondingly, the invention also provides a rock-soil layer in-situ lateral pressure testing method which is applied to the rock-soil layer in-situ lateral pressure testing device; further comprising the steps of:
s1: drilling out a drill hole by adopting an engineering geological drilling machine, and arranging a side pressure device at a test part in the drill hole;
s2: when the adopted by-pressure device is a split type by-pressure device, the testing wire and the liquid medium conduit are connected with the by-pressure device on the ground information processing control device, and then the by-pressure device is placed on the testing part;
s3: when the adopted by-pass pressure device is an integrated by-pass pressure device, a drill rod is connected with the device in the hole of the integrated by-pass pressure device; after the integrated bypass pressure device hole device is placed at a test position, a test wireless communication joint with a test line is placed at a joint design position through a drill rod hole, and a test control data acquisition processor is communicated with a wireless signal and communicates; the ground information processing control device sends an instruction to the test control data acquisition processor to start the electro-hydraulic power source; when the split type by-pressure device is adopted, the split type by-pressure device with the liquid conveying pipe is prevented from being arranged at a drilling test position, and when the test is needed, an electro-hydraulic power source starting button on the split type electromechanical electro-hydraulic power source ground device is used for directly starting;
s4: according to the side pressure test initial data and the side pressure test scheme collected by the test control data collection processor, after a test working program is set on the ground information processing control device, an automatic test program is started to carry out side pressure test; step manual test operation can also be carried out according to a set test working program;
s5: after the test working procedure is completely finished, starting a test finishing procedure; and after the ground information processing control device prompts that the test work is finished, the in-situ lateral pressure test of the rock-soil layer is completely finished.
According to the scheme provided by the invention, the electro-hydraulic power source is used as the power of the pressure bypass device, so that the effect which is not possessed by the conventional pneumatic pressure bypass device is achieved; on one hand, the volume and the weight of the device are greatly reduced, and the device is favorable for field operation of side pressure test; particularly, the in-hole electro-hydraulic power source side pressure test is integrally designed, the bottleneck that the side pressure test depth is limited in the prior art is broken through, and the blank of the depth engineering investigation in-situ test technology is filled; on the other hand, the utilization of the electrical property is more beneficial to realizing the exertion of the automation and digital testing technology, all the testing data and the control data are collected by using the sensor, so that the deviation of manual collection and theoretical calculation adopted by the original testing initial data is effectively eliminated, the side pressure testing result is closer to the actual engineering, the testing result is more accurate and reliable due to the automatically controlled testing process, and the optimal testing result can be provided for the engineering through the digital analysis technology; moreover, the scheme provided by the invention adopts a specific in-hole wireless communication technology, provides a method for communication between the ground control system and the underground in-hole side pressure device, fills the blank that the original device is not communicated with the underground in-hole side pressure device on the ground, has simple, convenient and quick communication technology, greatly reduces the auxiliary operation workload, improves the test efficiency, and can be popularized and applied to other in-situ test methods in the engineering investigation field.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a process flow diagram of an electro-hydraulic power source of a by-pass pressure device according to the present invention;
FIG. 2 is a flow chart of information acquisition and system control of the in-hole electro-hydraulic power source side pressure testing integrated machine of the invention;
FIG. 3 is a flow chart of information acquisition and system control of the electrohydraulic power source side pressure test split machine of the present invention;
FIG. 4 is a schematic diagram of an integrated in-hole electrohydraulic power source side pressure testing device of the present invention;
FIG. 5 is a schematic diagram of a split machine of the electro-hydraulic power source side pressure testing device.
In the figure: 1. a liquid medium storage tank; 2. an electrically-driven hydraulic pump; 3. an electromagnetic directional valve; 4. an electronic liquid flow meter; 5. a one-way sequence valve; 6. a three-cavity pressure bypass device; 7. a pressure PDI controller; 8. an electronic liquid flow meter; 9. a pressure sensor for testing the bare hole of the part; 10. a measurement intracavity pressure sensor; 11. a wireless communication module for information in the hole; 12. arranging a device in the drill hole of the all-in-one machine; 13. a split-body power source ground device for the electric industry; 14. a USB interface data connection line; 21. a ground information processing control device; 22. drilling; 23. a signal transmitter; 24. a liquid medium compartment; 25. a power supply compartment; 26. a data acquisition cabin; 27. an electro-hydraulic power cabin; 28. a control valve compartment; 29. pressing the protecting cavity by side; 30. a bypass pressure test chamber; 31. pressing the protecting cavity aside; 32. an in-hole device of an electro-hydraulic power source; 41. a ground information processing control device; 42. the split machine electrohydraulic power source ground device; 43. a liquid medium conduit; 44. drilling; 45. a bypass joint cabin; 46. a pressure bypass body.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 5, the present invention provides a rock-soil layer in-situ lateral pressure testing apparatus, which comprises a ground information processing control device, a testing control data acquisition processor and a testing control circuit board; the ground information processing control device is in communication connection with the test control data acquisition processor; the test control data acquisition processor is electrically connected with the test control circuit board; the test control circuit board and the test control data acquisition processor are respectively and electrically connected with the test unit of the bypass transformer; the ground information processing control device is used for acquiring the test data of the bypass transformer, processing the test data and issuing a test process control instruction to the test control data acquisition processor; the test control data acquisition processor is used for receiving the test data of the test unit and the test process control instruction of the ground information processing control device and transmitting the test data and the test process control instruction to the ground information processing control device; a test unit; the test unit is arranged in the drill hole and used for collecting test data of the rock-soil layer and transmitting the test data to the ground information processing control device through the test control data collection processor to analyze and calculate in-situ lateral pressure data of the rock-soil layer; by adopting the scheme, the electric connection structure of the rock-soil layer in-situ side pressure testing device can be simplified, the volume of the rock-soil layer in-situ side pressure testing device is reduced, the workload of manual operation is reduced, the testing parameters can be effectively recorded for a long time, the searching is convenient, meanwhile, the testing deviation can be effectively reduced, the testing precision is improved, and the working efficiency is improved.
Preferably, in combination with the above solutions, as shown in fig. 1 to 5, in the present embodiment, the test unit includes an electric hydraulic pump 2, an electromagnetic directional valve 3, a one-way sequence valve 5, and a pressure PDI controller 7; the electric hydraulic pump 2, the electromagnetic directional valve 3, the one-way sequence valve 5 and the pressure PDI controller 7 are respectively and electrically connected with the test control circuit board; specifically, an electric hydraulic pump is used to provide hydraulic pressure power for testing; the electromagnetic directional valve is used for guiding the flow direction of system liquid; the one-way sequence valve is used for controlling the flow direction of system liquid; the pressure PDI controller is used for controlling the multistage pressure values and the pressurizing duration of the liquid in the measuring cavity, the bypass pressure upper protection cavity and the bypass pressure lower protection cavity according to a program; and the test control circuit board is used for distributing electric control signal wires of all the components of the test unit and connecting the power supply wires.
Preferably, in combination with the above solutions, as shown in fig. 1 to 5, in the present embodiment, the test unit includes an electronic liquid flowmeter 4, a test site bare hole pressure sensor 9, and a measurement cavity pressure sensor 10; the electronic liquid flowmeter 4, the pressure sensor 9 of the bare hole of the testing part and the pressure sensor 10 in the measuring cavity are respectively and electrically connected with the testing control data acquisition processor; in particular, electronic liquid flow meters are used to measure and record the volume of liquid flowing into a measurement chamber; the pressure sensor of the bare hole of the testing part is used for measuring and recording the pressure of the external space of the side pressure testing cavity; the pressure sensor in the measuring cavity is used for measuring and recording the pressure in the inner space of the measuring cavity; the pressure sensors in the measuring cavity are respectively and electrically connected with the test control data acquisition processor.
Preferably, in combination with the above solution, as shown in fig. 1, in this embodiment, the system of the electro-hydraulic power source includes a liquid medium storage tank 1, an electric hydraulic pump 2, an electromagnetic directional valve 3, an electronic liquid flow meter 4, a one-way sequence valve 5, a three-cavity pressure bypass device 6, and a pressure PDI controller 7; specifically, the method comprises the following steps: the three-cavity pressure device 6 consists of a metal framework and a sealed rubber membrane wrapped outside the metal framework, liquid is injected into the sealed rubber membrane during testing, and the rubber membrane expands outwards to apply pressure to a rock-soil body under the filling of the liquid; in the testing process, different compression deformation results of the rock-soil body can be obtained under the action of different liquid pressures; in this embodiment, the electric hydraulic pump 2 can provide liquid with a fixed flow rate within a rated pressure range, and when the liquid passes through the pressure PDI controller 7, the liquid pressure is adjusted to a fixed value required by a test, and multi-stage adjustment can be achieved; when the liquid with pressure is communicated with the inner cavity of the rubber membrane of the three-cavity lateral pressure device 6, the lateral pressure test of the rock-soil layer can be carried out under the set pressure; after the test is finished, the liquid flow is reversed through the electromagnetic reversing valve 3, and the electric hydraulic pump 2 can pump out the liquid in the rubber film inner cavity of the three-cavity bypass pressure device 6 and send the liquid back to the liquid medium storage tank 1.
Preferably, in combination with the above solutions, as shown in fig. 1 to 5, in the present embodiment, the pressure bypass device is a split pressure bypass device; as shown in fig. 3, the split type pressure bypass device comprises a ground information processing control device 41, a split type electromechanical power source ground device 42, a pressure bypass connector cabin 45 and a pressure bypass device body 46; a bypass joint capsule 45 and a bypass body 46 are disposed within the bore 44; the split engine electrohydraulic power source ground device 42 is arranged on the ground and is communicated with a pressure bypass device joint cabin 45 and a pressure bypass device body 46 through a liquid medium conduit 43; the split machine electrohydraulic power source ground device 42 conveys lateral pressure liquid to a lateral pressure device body 46 through a fluid medium conduit 43 through a lateral pressure device joint cabin 45; the test unit is arranged in the split-body electromechanical hydraulic power source ground device 42.
Preferably, in combination with the above solutions, as shown in fig. 1 to 5, in the present embodiment, the split electromechanical hydraulic power source ground device 42 is in communication connection with the ground information processing control device 41 through a data communication interface; the data communication interface comprises USB serial port modules which are electrically connected through a lead.
Preferably, in combination with the above solutions, as shown in fig. 1 to 5, in the present embodiment, the pressure bypass device is an integrated pressure bypass device; as shown in fig. 2, the all-in-one in-hole device 12 is characterized in that an integrated pressure bypass device is arranged in a drill hole and is in communication connection with a ground information processing control device through a wireless data transmission module; the wireless data transmission antenna of the integrated side pressure device is arranged at the top of the testing device, the antenna body is sealed by a plastic block and is installed in an embedded mode, the antenna of the ground information processing control device is in a plastic sealing cylindrical shape, the cylindrical antenna is electrically connected with the ground information processing control device by a communication cable, the cylindrical antenna is placed to the antenna of the integrated side pressure device from the inner hole of the drill rod by the communication cable, and the side pressure test can be implemented after the two antennas transmit and receive identification signals successfully; specifically, the wireless data transmission module comprises a data format conversion module and an information wireless sending and receiving module; the data format conversion module is used for converting the collected side pressure test pressure and flow data and the collected electric power source automatic control data into a data format conforming to wireless communication; the information wireless transmitting and receiving module is used for carrying out wireless information communication ports in the drill holes of the ground control system and the in-hole data acquisition device and pushing information to the ground information processing control device and the test control data acquisition processor; furthermore, the wireless data transmission module is a serial port wireless full duplex or microwave communication module.
Preferably, in combination with the above solutions, as shown in fig. 1 to 5, in the present embodiment, the integrated pressure bypass device includes an in-hole device of the electric hydraulic power source; the in-hole device of the electro-hydraulic power source is in communication connection with the ground information processing control device 21 through a wireless data transmission module; the electro-hydraulic power source hole device comprises a signal transmitter 23, a liquid medium cabin 24, a power cabin 25, a data acquisition cabin 26, an electro-hydraulic power cabin 27, a control valve cabin 28, a bypass pressure upper protection cavity 29, a bypass pressure test cavity 30 and a bypass pressure lower protection cavity 31; the electro-hydraulic power source hole device is arranged in the drill hole 22; the signal transmitter 23 is used for installing a wireless communication module and a transmitting antenna and realizing communication between the in-hole device of the electro-hydraulic power source and the ground information processing control device; the liquid medium cabin is used for storing and supplying liquid used by the system; the power supply cabin is used for installing a battery used by the system; the data acquisition cabin is used for installing a test control data acquisition processor; the electro-hydraulic power cabin is used for installing an electric hydraulic pump assembly; the control valve cabin is used for installing a PID control valve assembly; the bypass upper pressure protection cavity, the bypass lower pressure protection cavity and the bypass pressure test cavity are pressure execution components for in-situ bypass pressure test of the rock-soil layer; the in-hole device of the electro-hydraulic power source is arranged in the drill hole.
Preferably, in combination with the above solutions, as shown in fig. 1 to 5, in this embodiment, the pressure bypass device includes an electro-hydraulic power source and a digital information measurement module; the electrohydraulic power source is used for providing liquid medium pressure for the in-situ side pressure test of the rock-soil layer; the digital information measuring module is used for measuring and recording the side pressure test data, and converts an analog or pulse signal obtained by the measurement of the sensor into a digital signal which can be identified by the test control data acquisition processor and is transmitted to the ground information processing control device through the test control data acquisition processor; specifically, the electro-hydraulic power source specifically comprises a power supply unit and an electric hydraulic unit; the power supply unit is used for supplying power to the electric hydraulic press; the electric hydraulic unit is used for providing liquid pressure and flow which meet the requirement of a side pressure test for the side pressure device, and the electric hydraulic unit is divided into an integrated type and a split type; when the electric hydraulic unit and the side pressure device are integrated, the electric hydraulic unit and the side pressure device are both arranged in an underground drill hole during testing; when the electric hydraulic unit and the pressure bypass device are split, only the pressure bypass device is arranged in an underground drill hole during testing; furthermore, the digital information measuring module comprises a side pressure data acquisition unit, a sensor unit and a control unit; the pressure measurement device comprises a pressure measurement unit, a pressure measurement unit and a pressure measurement unit, wherein the pressure measurement unit is used for measuring the pressure of the pressure measurement unit; the sensor unit is used for converting the pressure and deformation information of the side pressure test in the operation process of the side pressure device into digital data information; the control unit is used for making the pressure and flow rate of the side pressure test in the operation process of the side pressure device meet the automatic control equipment of the test requirement.
Preferably, with reference to the above schemes, as shown in fig. 1 to 5, in this embodiment, the ground information processing and controlling device includes a CPU central controller, a data acquisition and storage module, a hydraulic control unit, a data communication module, and a satellite positioning module; the CPU central controller is an operation component for providing a human-computer interface, test control and test data analysis and storage; the data acquisition and storage module is used for testing components for acquiring and storing digital information; the hydraulic control unit is used for testing programming; a component for setting a PID control valve and a test control instruction; the data communication module is a communication component with an internet function and used for releasing the side pressure test result in real time; the satellite positioning module is a traceable and unchangeable position recording component which is provided for marking the reliability of the test result; the rock-soil layer in-situ side pressure testing device provided by the invention is also additionally provided with a satellite positioning module and a data transmission module, so that additional position and time information can be acquired for each data, the data can be transmitted to a data center in time, the accuracy and reliability of in-situ side pressure testing parameters and information can be ensured, and the data can be traced.
Correspondingly, in combination with the scheme, the invention also provides a rock-soil layer in-situ lateral pressure testing method which is applied to the rock-soil layer in-situ lateral pressure testing device; further comprising the steps of:
s1: drilling out a drill hole by adopting an engineering geological drilling machine, and arranging a side pressure device at a test part in the drill hole;
s2: when the adopted by-pressure device is a split type by-pressure device, the testing wire and the liquid medium conduit are connected with the by-pressure device on the ground information processing control device, and then the by-pressure device is placed on the testing part;
s3: when the adopted by-pressure device is an integrated by-pressure device, a testing wireless communication joint with a testing line is placed at a designed position through an inner hole of a drill rod, and is communicated with a testing control data acquisition processor through a wireless signal, and the ground information processing control device sends an instruction to the testing control data acquisition processor to start an electro-hydraulic power source; when the split type pressure by-pass device is adopted, the split type pressure by-pass device with the liquid conveying pipe is prevented from being arranged at a drilling test position, and when the test is needed, the electric hydraulic power source starting button on the ground information processing control device is used for directly starting;
s4: according to the side pressure test initial data and the side pressure test scheme collected by the test control data collection processor, after a test working program is set on the ground information processing control device, an automatic test program is started to carry out side pressure test; step manual test operation can also be carried out according to a set test working program;
s5: after the test working procedure is completely finished, starting a test finishing procedure; and after the ground information processing control device prompts that the test work is finished, the in-situ lateral pressure test of the rock-soil layer is completely finished.
According to the scheme provided by the invention, the electro-hydraulic power source is used as the power of the pressure bypass device, so that the effect which is not possessed by the conventional pneumatic pressure bypass device is achieved; on one hand, the volume and the weight of the device are greatly reduced, and the device is favorable for field operation of side pressure test; particularly, the in-hole electro-hydraulic power source side pressure test is integrally designed, the bottleneck that the side pressure test depth is limited in the prior art is broken through, and the blank of the depth engineering investigation in-situ test technology is filled; on the other hand, the utilization of the electrical property is more beneficial to realizing the exertion of the automation and digital testing technology, all the test data and the control data are collected by using the sensor, so that the deviation of the original test initial data which is calculated by theory is effectively eliminated, the side pressure test result is closer to the actual engineering, the test result is more accurate and reliable by the automatically controlled test flow, and the optimal test result is provided for the engineering by the digital analysis technology; moreover, the scheme provided by the invention adopts a specific in-hole wireless communication technology, provides a method for communication between the ground control system and the underground in-hole side depressor, fills the blank that the original device is not communicated with the underground in-hole side depressor on the ground, has simple, convenient and quick communication technology, greatly reduces the auxiliary operation workload, improves the test efficiency, and can be popularized and applied to other in-situ test methods in the engineering investigation field; further, peculiar downthehole wireless communication technique is serial ports wireless full duplex, microwave communication module, the wireless data transmission antenna setting of the other depressor of integral type is at the device top, antenna body plastic block is sealed, embedded installation, ground information processing controlling means's antenna is plastic sealing cylindricly, adopt the communication cable to connect cylindric antenna and ground information processing controlling means electricity, and transfer cylindric antenna to the antenna department of the other depressor of integral type by the drilling rod hole with the communication cable, two antenna mutual emission, after the identification signal adaptation succeeds, can implement other pressure test.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (3)
1. The in-situ lateral pressure testing device for the rock-soil layer is characterized by comprising a ground information processing control device, a test control data acquisition processor and a test control circuit board; the ground information processing control device is in communication connection with the test control data acquisition processor; the test control data acquisition processor is electrically connected with the test control circuit board; the test control circuit board and the test control data acquisition processor are respectively and electrically connected with a test unit of the bypass transformer; the ground information processing control device is used for acquiring the test data of the bypass transformer, processing the test data and issuing a test process control instruction to the test control data acquisition processor; the test control data acquisition processor is used for receiving the test data of the test unit and a test process control instruction of the ground information processing control device and transmitting the test data and the test process control instruction to the ground information processing control device; the test unit is arranged in the drill hole and used for collecting test data of a rock-soil layer;
the testing unit comprises an electric hydraulic pump, an electromagnetic directional valve, a one-way sequence valve, a pressure PDI controller, an electronic liquid flowmeter, a testing part bare hole pressure sensor and a measuring cavity pressure sensor; the electric hydraulic pump is used for providing hydraulic pressure power for testing; the electromagnetic directional valve is used for guiding the flow direction of system liquid; the one-way sequence valve is used for controlling the flow direction of system liquid; the pressure PDI controller is used for controlling the multistage pressure values and the pressurizing duration of the liquid in the measuring cavity, the bypass pressure upper protection cavity and the bypass pressure lower protection cavity; the test control circuit board is used for distributing electric control signal wires of all parts of the test unit and connecting power lines; the electronic liquid flow meter is used for measuring and recording the volume of liquid flowing into the measuring cavity; the pressure sensor of the bare hole of the test part is used for measuring and recording the pressure of the external space of the side pressure test cavity; the pressure sensor in the measuring chamber is used for measuring and recording the pressure in the inner space of the measuring chamber,
the pressure bypass device is an integrated pressure bypass device; the integrated pressure-bypass device is arranged in the drill hole and is in communication connection with the ground information processing control device through a wireless data transmission module, and the integrated pressure-bypass device comprises an electro-hydraulic power source in-hole device; the electro-hydraulic power source hole device comprises a signal transmitter, a liquid medium cabin, a power cabin, a data acquisition cabin, an electro-hydraulic power cabin, a control valve cabin, a bypass pressure upper protection cavity, a bypass pressure test cavity and a bypass pressure lower protection cavity; the signal transmitter is used for installing a wireless communication module and a transmitting antenna and realizing communication between the in-hole device of the electro-hydraulic power source and the ground information processing control device; the liquid medium cabin is used for storing and supplying liquid used by the system; the power supply cabin is used for installing a battery used by the system; the data acquisition cabin is used for installing a test control data acquisition processor; the electro-hydraulic power cabin is used for installing an electric hydraulic pump assembly; the control valve cabin is used for installing a PID control valve assembly; the pressure-bypass upper protective cavity, the pressure-bypass lower protective cavity and the pressure-bypass test cavity are pressure executing components for in-situ pressure-bypass test of rock and soil layers.
2. The in-situ lateral pressure testing device for the geotechnical layer according to claim I, wherein the ground information processing and controlling device comprises a CPU central controller, a data acquisition and storage module, a hydraulic control unit, a data communication module and a satellite positioning module.
3. An in-situ lateral pressure testing method for rock-soil layers, which is characterized by being applied to the in-situ lateral pressure testing device for the rock-soil layers of any one of the claims 1 to 2; further comprising the steps of:
s1: drilling out a drill hole by adopting an engineering geological drilling machine, and arranging a side pressure device at a test part in the drill hole;
s2: when the adopted by-pass pressure device is an integrated by-pass pressure device, a drill rod is connected with the device in the hole of the integrated by-pass pressure device; after the integrated bypass pressure device hole device is placed at a test position, a test wireless communication joint with a test line is placed at a joint design position through a drill rod hole, and a test control data acquisition processor is communicated with a wireless signal and communicates; the ground information processing control device sends an instruction to the test control data acquisition processor to start the electro-hydraulic power source;
s3: according to the side pressure test initial data and the side pressure test scheme collected by the test control data collection processor, after a test working program is set on the ground information processing control device, an automatic test program is started to carry out side pressure test; step-by-step manual test operation can also be performed according to a set test working program;
s4: after the test working procedure is completely finished, starting a test finishing procedure; and after the ground information processing control device prompts that the test work is finished, the in-situ lateral pressure test of the rock-soil layer is completely finished.
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| CN113155627B (en) * | 2021-04-08 | 2022-06-28 | 青岛海洋地质研究所 | Hydrate-containing sediment side pressure characteristic indoor simulation device and method and application |
| CN113624619A (en) * | 2021-08-11 | 2021-11-09 | 中建路桥集团有限公司 | Measuring equipment and measuring method for shear strength and modulus of soil body |
| CN114354369B (en) * | 2022-01-12 | 2024-03-26 | 武汉中交试验检测加固工程有限责任公司 | Method for testing resilience modulus of existing roadbed by using side pressure device |
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