Micro-disturbance water and soil pressure in-situ monitoring device and method based on MEMS technology

Abstract

The invention provides a micro-disturbance water and soil pressure in-situ monitoring device and method based on an MEMS technology, and the device comprises a probe rod which is a polygon prism and is internally provided with a hollow through hole; the water and soil pressure sensor unit is in threaded connection with the bottom of the probe rod and is used for detecting water pressure and soil pressure; the conical tip probe is in threaded connection with the bottom of the water and soil pressure sensor unit; the paperless recorder is connected with the water and soil pressure sensor unit through a signal output wire, and the signal output wire penetrates through the through hole in the probe rod. The static penetrometer is used for pressing in / pulling out the water and soil pressure sensor unit, the monitoring device can conduct micro-disturbance burying and recycling on an undisturbed soil body, and water and soil pressure responses of multiple directions at the same position are efficiently and accurately monitored. According to the monitoring device and method, the problems that an existing monitoring device is single in measurement parameter and large disturbance is generated on an undisturbed soil body in the installation process are solved, and accurate and reliable engineering equipment and scheme are provided.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ monitoring of water and soil pressure, and particularly to a micro-disturbance in-situ monitoring device and method for water and soil pressure based on MEMS technology. Background Art

[0002] The in-situ monitoring technology of water and soil pressure plays a crucial role in modern engineering construction. With the continuous upgrading of urban construction and infrastructure, the requirements for controlling the deformation and displacement of surrounding soil during the construction of various underground projects such as tunnels, slopes, and foundation pits are increasing day by day. Real-time monitoring of the changes in water and soil pressure in the original soil not only helps to promptly discover potential geological hazards but also plays a decisive role in preventing engineering accidents and ensuring structural safety. In recent years, as a new type of microelectromechanical system, MEMS technology has received extensive attention in the field of pressure sensors due to its advantages such as small size, low power consumption, and rapid response, and has gradually been applied to water and soil pressure monitoring, laying a technical foundation for realizing high-precision and real-time online monitoring.

[0003] Compared with traditional soil pressure sensors using the drilling method and disc structure, the new type of pressure sensor based on MEMS technology shows obvious advantages. Traditional devices usually need to drill holes in the soil in advance, and it is easy to disturb the original soil layer during the construction process, changing the stress state in the soil and resulting in data deviation; in addition, traditional equipment can often only measure the pressure in a single direction and is difficult to comprehensively reflect the real situation under a complex stress field. While MEMS sensors can be directly embedded into the soil interior by means of hydrostatic burial, and its miniaturized design not only significantly reduces the damage to the soil structure but also realizes the comprehensive monitoring of the soil pressure field through multi-directional data acquisition, significantly improving the accuracy and reliability of the data.

[0004] Precisely monitoring the in-situ soil water pressure not only has important significance for engineering safety assessment but also plays an irreplaceable role in the early warning of geological disasters. The high-precision and multi-dimensional pressure data acquisition realized by using MEMS technology can timely reflect the minute changes in the stress state of the soil and provide strong data support for the safety analysis and risk assessment of engineering structures.

[0005] Therefore, the technical problem that needs to be solved urgently at present is that the existing monitoring devices have a single measurement parameter and cause a large disturbance to the original soil during the installation process. Summary of the Invention

[0006] The present invention is made to solve the above problems, and its purpose is to provide a micro-disturbance in-situ monitoring device and method for water and soil pressure based on MEMS technology.

[0007] The present invention provides an in-situ monitoring device for micro-disturbed soil and water pressure based on MEMS technology, which has the following characteristics: including a probe rod, which is a multi-prismatic body with a hollow through-hole opened inside; a soil and water pressure sensor unit, screwed to the bottom of the probe rod, for detecting water pressure and soil pressure; a conical tip probe, screwed to the bottom of the soil and water pressure sensor unit; and a paperless recorder, connected to the soil and water pressure sensor unit through a signal output wire, and the signal output wire passes through the through-hole inside the probe rod. Among them, the soil and water pressure sensor unit and the conical tip probe are inserted under the ground to comprehensively monitor the soil pressure field, and the paperless recorder is set on the ground for recording and displaying the water pressure and soil pressure data monitored by the soil and water pressure sensor unit.

[0008] In the in-situ monitoring device for micro-disturbed soil and water pressure based on MEMS technology provided by the present invention, it may also have the following characteristics: among them, the soil and water pressure sensor unit includes a multi-prismatic block, and several MEMS soil pressure sensors and MEMS pore water pressure sensors arranged on different surfaces of the multi-prismatic block. The several MEMS soil pressure sensors and MEMS pore water pressure sensors are installed and fixed inside the multi-prismatic block through threads and are connected to the signal output wire to transmit the monitoring data in real time.

[0009] In the in-situ monitoring device for micro-disturbed soil and water pressure based on MEMS technology provided by the present invention, it may also have the following characteristics: among them, the conical tip probe includes a multi-prismatic body part and a conical part. The inside of the multi-prismatic body part is provided with internal threads, and the conical part is used for pressing into the soil downward.

[0010] In the in-situ monitoring device for micro-disturbed soil and water pressure based on MEMS technology provided by the present invention, it may also have the following characteristics: among them, the surface of the multi-prismatic body part of the conical tip probe, the surface of the multi-prismatic block of the soil and water pressure sensor unit, and the surface of the probe rod are flush.

[0011] In the in-situ monitoring device for micro-disturbed soil and water pressure based on MEMS technology provided by the present invention, it may also have the following characteristics: among them, the soil and water pressure sensor unit further includes an upper connection part and a lower connection part. The upper connection part is fixed to the upper end of the multi-prismatic block. The outside of the upper connection part has an external thread of the upper connection part, and an internal thread matching the external thread of the upper connection part is opened inside the through-hole. The lower connection part is fixed to the lower end of the multi-prismatic block. The outside of the lower connection part has an external thread of the lower connection part, and an internal thread matching the external thread of the lower connection part is opened inside the multi-prismatic body part of the conical tip probe.

[0012] In the in-situ monitoring device for micro-disturbed water and soil pressure based on MEMS technology provided by the present invention, it may also have the following features: Among them, the multi-prism block is a quadrangular prism block, chamfers are provided on the four edges in the vertical direction of the quadrangular prism block, and several MEMS soil pressure sensors include a first MEMS soil pressure sensor, a second MEMS soil pressure sensor, and a third MEMS soil pressure sensor. The first MEMS soil pressure sensor, the second MEMS soil pressure sensor, the third MEMS soil pressure sensor, and the MEMS pore water pressure sensor are arranged at a 90° angle on the same horizontal plane of the quadrangular prism. A through channel communicating with each other is provided in the upper connecting part and the quadrangular prism block. The through channel is used to pass the signal output wire, and the signal output wire is connected to the first MEMS soil pressure sensor, the second MEMS soil pressure sensor, the third MEMS soil pressure sensor, and the MEMS pore water pressure sensor.

[0013] In the in-situ monitoring device for micro-disturbed water and soil pressure based on MEMS technology provided by the present invention, it may also have the following features: Among them, the water and soil pressure sensor unit is made of stainless steel material.

[0014] In the in-situ monitoring device for micro-disturbed water and soil pressure based on MEMS technology provided by the present invention, it may also have the following features: Among them, the MEMS pore water pressure sensor further includes a sensing element, and a permeable stone is arranged on the surface of the sensing element. The permeable stone is used to exclude the interference of sediment intrusion and blockage.

[0015] The present invention also provides a method for in-situ monitoring of micro-disturbed soil and water pressure based on MEMS technology, which has the following characteristics. Specifically, it includes the following steps: S1, prepare the components of the multi-directional in-situ soil and water pressure monitoring device based on MEMS technology as claimed in claim 1, level the monitoring site, place the static cone penetration equipment in place and complete the layout; S2, tightly connect the soil and water pressure sensor unit and the cone tip probe through the corresponding threads, then completely pass the signal output wire through the inside of the sounding rod, and reserve enough length of wire at the other end of the sounding rod. Subsequently, tightly connect the soil and water pressure sensor unit and the sounding rod through the threads; S3, through the fixture matching the size of the sounding rod, complete the combination of the soil and water pressure sensor already connected to the sounding rod and the cone tip probe with the static cone penetration equipment laid out on the engineering site, and use the corresponding static pressure parameters to press the soil and water pressure sensor into a predetermined depth position in the undisturbed soil body, and complete the layout of the monitoring sensor; S4, the static cone penetrometer loosens the sounding rod and withdraws from the monitoring site, connect the reserved signal output wire to the paperless recorder, and turn on the power of the paperless recorder to start measuring and recording the changes in soil pressure and pore water pressure in multiple directions in the undisturbed soil body at the engineering site; S5, after the monitoring of the soil and water pressure is completed, lay out the static cone penetration equipment again and connect it to the multi-directional in-situ soil and water pressure monitoring device based on MEMS technology. Subsequently, pull out the multi-directional in-situ soil and water pressure monitoring device based on MEMS technology from the soil, clean and store it for the next use.

[0016] In the method for in-situ monitoring of micro-disturbed soil and water pressure based on MEMS technology provided by the present invention, it may also have the following characteristics: Among them, adjust the direction and burial depth of the soil and water pressure monitoring device, so as to be able to monitor the soil and water pressure responses at different directions and positions in the in-situ soil body at the engineering construction site for a long time and stably.

[0017] Functions and effects of the invention According to the multi-directional in-situ soil and water pressure monitoring device and method based on MEMS technology involved in the present invention, by configuring 3 high-precision soil pressure sensors and 1 pore water pressure sensor on the same horizontal plane, and controlling the size of the device very small according to the miniaturization characteristics of MEMS sensors, it can realize the micro-disturbed burial and recovery of the monitoring device for the undisturbed soil body, and accurately monitor the multi-directional soil and water pressure responses at the same position in the underground high-pressure water environment for a long time.

[0018] The multi-directional in-situ soil and water pressure monitoring device based on MEMS technology of the present invention is pressed into and pulled out of the soil in cooperation with the static cone penetration equipment, which can realize the micro-disturbed burial and recovery of the monitoring device for the undisturbed soil body, solve the problem that the existing device is prone to cause large disturbances to the undisturbed soil body during the installation process, and provides an accurate and reliable technology for the safety monitoring and disaster warning of geotechnical engineering. Description of the drawings

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the overall in-situ soil and water pressure monitoring device in the embodiment of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the probe rod in the embodiment of the present invention.

[0021] Figure 3 It is the three-dimensional structure 1 of the soil and water pressure sensor unit in the embodiment of the present invention.

[0022] Figure 4 It is the three-dimensional structure 2 of the soil and water pressure sensor unit in the embodiment of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the conical tip probe in the embodiment of the present invention. Detailed implementation manners

[0024] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0025] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the following embodiments will specifically elaborate on a micro-disturbance in-situ soil and water pressure monitoring device and method based on MEMS technology of the present invention in conjunction with the accompanying drawings.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the overall in-situ soil and water pressure monitoring device in the embodiment of the present invention.

[0027] As Figure 1 shown, the multi-directional in-situ soil and water pressure monitoring device 100 based on MEMS technology in this embodiment includes a probe rod 10, a soil and water pressure sensor unit 20, a conical tip probe 30, and a paperless recorder 40.

[0028] Figure 2 It is a three-dimensional structural schematic diagram of the probe rod in the embodiment of the present invention.

[0029] As Figure 2 shown, the probe rod 10 is a quadrangular prism, the width of the long side is 42 mm, and the width of the short side is mm. A hollow through hole with a diameter of 50 mm that penetrates up and down is provided inside, and internal threads are provided inside the through hole for connecting the soil and water pressure sensor unit 20.

[0030] Figure 3 It is the front view of the three-dimensional structure of the soil and water pressure sensor unit in the embodiment of the present invention. Figure 4 It is the rear view of the three-dimensional structure of the soil and water pressure sensor unit in the embodiment of the present invention.

[0031] As Figure 3-4 shown, the soil and water pressure sensor unit 20 is made of stainless steel material and is screwed to the bottom of the probe rod 10. The soil and water pressure sensor unit 20 is inserted under the ground to comprehensively monitor the soil pressure field.

[0032] The soil and water pressure sensor unit 20 includes a quadrangular prism block 28, a first MEMS soil pressure sensor 21, a second MEMS soil pressure sensor 22, a third MEMS soil pressure sensor 23, a MEMS pore water pressure sensor 24, an upper connection part 26 and a lower connection part 27.

[0033] Chamfers are provided on the four vertical edges of the quadrangular prism block 28.

[0034] The first MEMS soil pressure sensor 21, the second MEMS soil pressure sensor 22, the third MEMS soil pressure sensor 23 and the MEMS pore water pressure sensor 24 are fixedly installed on different surfaces of the quadrangular prism block 28 by threads. Each sensor is flush with the four outer surfaces of the quadrangular prism block 28 and is arranged at a 90° angle on the same horizontal plane of the quadrangular prism block 28.

[0035] The accuracies of the first MEMS soil pressure sensor 21, the second MEMS soil pressure sensor 22 and the third MEMS soil pressure sensor 23 are all within ±0.25%, and they can maintain high-precision and stable operation in the underground high-pressure water environment for a long time.

[0036] The MEMS pore water pressure sensor 24 further includes a sensing element, and a permeable stone is provided on the surface of the sensing element. The permeable stone is used to exclude the interference of sediment intrusion and blockage. The accuracy of the MEMS pore water pressure sensor 24 is within ±0.1%.

[0037] The upper connection part 26 is fixed to the upper end of the multi-prism block. The outer side of the upper connection part 26 has an external thread of the upper connection part, and an internal thread matching the external thread of the upper connection part is provided inside the through hole of the probe rod 10, so that the probe rod 10 can be screwed to the upper connection part 26.

[0038] The lower connection part 27 is fixed to the lower end of the multi-prism block. The outer side of the lower connection part 27 has an external thread of the lower connection part, and an internal thread matching the external thread of the lower connection part is provided inside the multi-prism part 31 of the taper tip probe 30.

[0039] The upper connecting part 26 and the inside of the quadrangular prism block 28 are provided with a connected through-channel 33 for passing through the signal output wire 25. The signal output wire 25 is connected to the first MEMS earth pressure sensor 21, the second MEMS earth pressure sensor 22, the third MEMS earth pressure sensor 23, and the MEMS pore water pressure sensor 24, thereby realizing the real-time transmission of monitoring data.

[0040] Figure 5 It is a schematic three-dimensional structure diagram of the cone tip probe in the embodiment of the present invention.

[0041] As Figure 5 shown, the cone tip probe 30 is screwed to the bottom of the water and earth pressure sensor unit 20 for inserting the multi-directional water and earth pressure in-situ monitoring device as a whole into the ground.

[0042] The cone tip probe 30 includes a multi-prism part 31 and a conical part 32. The multi-prism part 31 is 60 mm deep and 50 mm in diameter, and is internally provided with internal threads for screwing with the lower connecting part 27 to connect the water and earth pressure sensor unit 20. The conical part 32 can reduce the resistance to facilitate pressing the monitoring device into the soil.

[0043] The surface of the multi-prism part 31 of the cone tip probe 30, the surface of the quadrangular prism block 28 of the water and earth pressure sensor unit 20, and the surface of the probe rod 10 are flush.

[0044] The paperless recorder 40 is connected to the water and earth pressure sensor unit 20 through the signal output wire 25, and the signal output wire 25 passes through the through-hole inside the probe rod 10.

[0045] The paperless recorder 40 is arranged on the ground for recording and displaying the water pressure and earth pressure data monitored by the water and earth pressure sensor unit 20.

[0046] The present invention also discloses a multi-directional water and earth pressure in-situ monitoring method based on MEMS technology, including the following steps: S1. Prepare each component according to the above-mentioned multi-directional water and earth pressure in-situ monitoring device 100 based on MEMS technology, level the monitoring site, and place and arrange the static cone penetration equipment.

[0047] S2. Tightly connect the water and earth pressure sensor unit 20 and the cone tip probe 30 through the corresponding threads, then completely pass the signal output wire 25 through the inside of the probe rod 10, and reserve enough length of the wire at the other end of the probe rod 10. Subsequently, tightly connect the water and earth pressure sensor unit 20 and the probe rod 10 through the threads.

[0048] S3. Through a clamping component that matches the size of the sounding rod 10, the soil pressure sensor already connected to the sounding rod 10 and the conical tip probe 30 is combined with the static cone penetration equipment arranged on the construction site, and using the corresponding static pressure parameters, the soil pressure sensor is pressed into a predetermined depth position in the undisturbed soil mass, and the monitoring sensor layout is completed.

[0049] S4. The static cone penetrometer releases the sounding rod 10 and withdraws from the monitoring site, connects the reserved signal output wire 25 to the paperless recorder 40, and turns on the power of the paperless recorder 40 to start measuring and recording the changes in soil pressure and pore water pressure in multiple directions in the undisturbed soil mass at the construction site.

[0050] S5. After the monitoring of the soil pressure and water pressure is completed, the static cone penetration equipment is arranged again and connected to the multi-directional in-situ soil pressure and water pressure monitoring device 100 based on MEMS technology. Subsequently, the multi-directional in-situ soil pressure and water pressure monitoring device 100 based on MEMS technology is pulled out of the soil, cleaned and stored for the next use.

[0051] During the monitoring, the orientation and burial depth of the multi-directional in-situ soil pressure and water pressure monitoring device 100 based on MEMS technology can also be adjusted, so as to be able to monitor the soil pressure and water pressure responses in different directions and positions in the in-situ soil mass at the construction site for a long time and stably.

[0052] Functions and effects of the embodiment According to the multi-directional in-situ soil pressure and water pressure monitoring device and method based on MEMS technology involved in the present invention, by configuring 3 high-precision soil pressure sensors and 1 pore water pressure sensor on the same horizontal plane, and controlling the size of the device very small according to the miniaturization characteristics of the MEMS sensor, the monitoring device can realize the micro-disturbance burial and recovery of the undisturbed soil mass, and can accurately monitor the multi-directional soil pressure and water pressure responses at the same position in the underground high-pressure water environment for a long time.

[0053] The multi-directional in-situ soil pressure and water pressure monitoring device based on MEMS technology of the present invention is pressed into and pulled out of the soil mass in cooperation with the static cone penetration equipment, which can realize the micro-disturbance burial and recovery of the monitoring device for the undisturbed soil mass, solve the problem that the existing device is prone to cause large disturbances to the undisturbed soil mass during the installation process, and provides an accurate and reliable technology for geotechnical engineering safety monitoring and disaster warning.

[0054] The present invention sets permeable stones on the pressure-sensing element surface of the MEMS pore water pressure sensor, which can effectively eliminate the interference of sediment intrusion and blockage.

[0055] The present invention sets the outer shape of the soil pressure and water pressure sensor unit as a multi-prismatic shape, effectively reducing the resistance during the process of pressing into the soil mass and the disturbance effect on the undisturbed soil.

[0056] By dividing the cone tip probe into a multi - prism part and a cone part, the present invention facilitates the overall downward pressing of the in - situ soil and water pressure monitoring device into the soil mass, and also facilitates the adjustment of the orientation and burial depth of the soil and water pressure monitoring device.

[0057] Those skilled in the art should understand that the present invention is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A multi-directional in-situ soil pressure monitoring device based on MEMS technology, characterized in that Comprising: A probe rod, which is a multi - prism body and has a hollow through - hole inside; A water and soil pressure sensor unit, screwed to the bottom of the probe rod, for detecting water pressure and soil pressure; A cone - tip probe, screwed to the bottom of the water and soil pressure sensor unit; And A paperless recorder, connected to the water and soil pressure sensor unit through a signal output wire, and the signal output wire passes through the through - hole inside the probe rod, wherein, the water and soil pressure sensor unit and the cone - tip probe are inserted under the ground, so as to comprehensively monitor the soil pressure field, and the paperless recorder is arranged on the ground, for recording and displaying the water pressure and soil pressure data monitored by the water and soil pressure sensor unit.

2. The in - situ monitoring device for multi - direction water and soil pressure based on MEMS technology according to claim 1, characterized in that: Among them, The water and soil pressure sensor unit includes a multi - prism block, and a number of MEMS soil pressure sensors and MEMS pore water pressure sensors arranged on different surfaces of the multi - prism block, the number of MEMS soil pressure sensors and the MEMS pore water pressure sensors are installed and fixed inside the multi - prism block by threading and are connected to the signal output wire, so as to transmit the monitoring data in real time.

3. The in - situ monitoring device for multi - direction water and soil pressure based on MEMS technology according to claim 2, characterized in that: Among them, The cone - tip probe includes a multi - prism body part and a cone part, the inside of the multi - prism body part is provided with internal threads, and the cone part is used for pressing into the soil downward.

4. The in - situ monitoring device for multi - direction water and soil pressure based on MEMS technology according to claim 3, characterized in that: Among them, The surface of the multi - prism body part of the cone - tip probe, the surface of the multi - prism block of the water and soil pressure sensor unit, and the surface of the probe rod are flush.

5. The in - situ monitoring device for multi - direction water and soil pressure based on MEMS technology according to claim 3, characterized in that: Among them, The water and soil pressure sensor unit further includes an upper connection part and a lower connection part, the upper connection part is fixed to the upper end of the multi - prism block, the outside of the upper connection part has an external thread of the upper connection part, and the inside of the through - hole is provided with an internal thread matching the external thread of the upper connection part, the lower connection part is fixed to the lower end of the multi - prism block, the outside of the lower connection part has an external thread of the lower connection part, and the inside of the multi - prism body part of the cone - tip probe is provided with an internal thread matching the external thread of the lower connection part.

6. The in - situ monitoring device for multi - direction water and soil pressure based on MEMS technology according to claim 5, characterized in that: Among them, The multi - prism block is a quadrangular prism block, and chamfers are arranged on the four edges in the vertical direction of the quadrangular prism block, the number of MEMS soil pressure sensors includes a first MEMS soil pressure sensor, a second MEMS soil pressure sensor and a third MEMS soil pressure sensor, the first MEMS soil pressure sensor, the second MEMS soil pressure sensor, the third MEMS soil pressure sensor and the MEMS pore water pressure sensor are arranged at a 90° angle on the same horizontal plane of the quadrangular prism respectively. A through-channel communicating with each other is provided inside the upper connecting portion and the quadrangular prism block. The through-channel is used to pass the signal output wire, and the signal output wire is connected to the first MEMS earth pressure sensor, the second MEMS earth pressure sensor, the third MEMS earth pressure sensor, and the MEMS pore water pressure sensor.

7. The multi-directional in-situ monitoring device for water and soil pressure based on MEMS technology according to claim 1, wherein: Among them, The water and soil pressure sensor unit is made of stainless steel.

8. The multi-directional in-situ monitoring device for water and soil pressure based on MEMS technology according to claim 2, wherein: Among them, The MEMS pore water pressure sensor further includes a sensing element, and a permeable stone is arranged on the surface of the sensing element. The permeable stone is used to exclude the interference of sediment intrusion and blockage.

9. A multi-directional in-situ monitoring method for soil pressure based on MEMS technology, characterized in that, It includes the following steps: S1. Prepare each component of the multi-directional in-situ monitoring device for water and soil pressure based on MEMS technology according to claim 1, level the monitoring site, and place and arrange the static cone penetration equipment in place; S2. Tightly connect the water and soil pressure sensor unit and the cone tip probe through corresponding threads. Then, completely pass the signal output wire through the inside of the drill rod, and reserve enough length of the wire at the other end of the drill rod. Subsequently, tightly connect the water and soil pressure sensor unit and the drill rod through threads; S3. Through a clamping part matching the size of the drill rod, complete the combination of the water and soil pressure sensor that has been connected to the drill rod and the cone tip probe with the static cone penetration equipment arranged in place at the construction site. Use corresponding static pressure parameters to press the water and soil pressure sensor into a predetermined depth position in the undisturbed soil body, and complete the arrangement of the monitoring sensor; S4. The static cone penetrometer loosens the drill rod and withdraws from the monitoring site. Connect the reserved signal output wire to the paperless recorder, and turn on the power of the paperless recorder to start measuring and recording the changes in soil pressure and pore water pressure in multiple directions in the undisturbed soil body at the construction site; S5. After the monitoring of water and soil pressure is completed, arrange the static cone penetration equipment again and connect it to the multi-directional in-situ monitoring device for water and soil pressure based on MEMS technology. Then, pull out the multi-directional in-situ monitoring device for water and soil pressure based on MEMS technology from the soil, clean and store it, and prepare for the next use.

10. The multi-directional in-situ monitoring method for water and soil pressure based on MEMS technology according to claim 9, wherein: Among them, Adjust the direction and buried depth of the water and soil pressure monitoring device, so as to be able to stably monitor the water and soil pressure responses in different directions and positions in the in-situ soil body at the engineering construction site for a long time.

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