CN113450542B - Real-time monitoring system and method for rock soil water content below urban traffic key road - Google Patents
Real-time monitoring system and method for rock soil water content below urban traffic key road Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 159
- 239000002689 soil Substances 0.000 title claims abstract description 68
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 13
- 238000005481 NMR spectroscopy Methods 0.000 claims abstract description 89
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- 238000007781 pre-processing Methods 0.000 claims abstract description 19
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- 238000007726 management method Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 17
- 239000011229 interlayer Substances 0.000 claims description 16
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- 238000004321 preservation Methods 0.000 claims description 9
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- 238000007405 data analysis Methods 0.000 abstract description 2
- 238000013523 data management Methods 0.000 abstract description 2
- 238000010223 real-time analysis Methods 0.000 abstract 1
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- 230000003628 erosive effect Effects 0.000 description 2
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- 210000000476 body water Anatomy 0.000 description 1
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Abstract
The system comprises a nuclear magnetic resonance monitoring device for dynamically monitoring the water content of the rock soil below the urban traffic main road, a temperature control device for maintaining the dynamic balance of the working environment temperature of a nuclear magnetic resonance instrument, a Beidou positioning device for determining the position of an abnormal point of monitoring data, a data storage and preprocessing system for data storage, management and analysis, an early warning system, a wireless transmission system for rapidly transmitting the monitoring data, an early warning signal and a monitoring instruction, and a remote monitoring and control system for analyzing the monitoring data in real time by a remote user and processing the early warning signal. The monitoring data is preprocessed by the field monitoring center and uploaded to the cloud disk database through the wireless transmission system, and a remote user accesses the cloud disk database, further analyzes the monitoring data and issues a monitoring command; the effective cooperation among the systems realizes dynamic monitoring and real-time analysis of the water content of rock soil below the urban traffic main road, and improves the monitoring timeliness.
Description
Technical Field
The invention relates to a system and a method for monitoring rock-soil water content in real time, in particular to a system and a method for monitoring dynamic changes of rock-soil water content under an urban traffic main road in real time by combining a nuclear magnetic resonance technology.
Background
Engineering practices show that water is a main factor causing harm to the roadbed and the road surface of the urban traffic main road. According to different water sources, water harmful to the roadbed and the pavement can be divided into two categories, namely ground water and underground water. But the most influential, most persistent, is groundwater. The water level change of underground water and adverse geological effects such as corrosivity and seepage damage of the underground water seriously damage the maintenance and normal use of roads. Due to the interaction of underground water and soil, the strength and stability of the rock soil body below the main road of urban traffic are reduced, the gap is gradually increased, and even a cave is formed, so that the rock soil body structure is loosened or damaged, and the soil body around the roadbed is deformed, cracked, settled, collapsed and the like. Therefore, in the operation and maintenance process of the urban traffic main road, effective measures are adopted to monitor the erosion effect of the underground water below the traffic main road.
The traditional monitoring method cannot directly represent the pore structure of the rock soil body below the urban traffic main road, often represents the hydrogeological attribute by virtue of indirect parameters such as resistivity and the like, and has the disadvantages of complex operation, time and labor waste, large workload and low accuracy. Therefore, the problem of improving the monitoring of the water content of the rock soil body below the main road of the urban traffic is to be solved urgently.
Disclosure of Invention
The technical problem is as follows: the invention aims to overcome the defects in the prior art and provides the device and the method for monitoring the water content of the rock soil below the urban traffic main road in real time, which are simple to operate, time-saving, labor-saving and high in accuracy.
The technical scheme is as follows: in order to achieve the purpose, the system for monitoring the water content of the rock soil below the urban traffic main road in real time comprises a remote monitoring and control system, a cloud disk database, an electric power optical cable, a communication optical cable, a nuclear magnetic resonance monitoring device, a temperature control device, a Beidou positioning device, a data storage and preprocessing system and a wireless transmission system, wherein the electric power optical cable, the communication optical cable, the nuclear magnetic resonance monitoring device, the temperature control device, the Beidou positioning device, the data storage and preprocessing system and the wireless transmission system are arranged in the comprehensive corridor area of the underground urban pipeline; the data storage and pretreatment system comprises an on-site monitoring center arranged in an underground urban pipeline comprehensive corridor and a plurality of data storage boxes connected with a data line of the on-site monitoring center, the on-site monitoring center pretreats a plurality of monitoring data in the data storage boxes, the monitoring data are uploaded to a cloud disk database through a wireless transmission system, and a remote monitoring and control system monitors and controls the on-site condition in real time; the wireless transmission system comprises a '5G' wireless transmission base station arranged on the ground, and a plurality of signal transmitting units arranged at intervals along a roadbed on the upper layer of the underground urban pipeline comprehensive corridor, wherein the plurality of signal transmitting units are respectively connected with a power optical cable and a communication optical cable arranged in the underground urban pipeline comprehensive corridor through optical cables; the power optical cable and the communication optical cable are laid at the top of the underground urban pipeline comprehensive corridor, the nuclear magnetic resonance monitoring devices are multiple and are arranged in the underground urban pipeline comprehensive corridor lower-layer foundation at intervals corresponding to the positions of the signal transmitting units one to one, a temperature control device and a Beidou positioning device are arranged in each nuclear magnetic resonance monitoring device respectively, the nuclear magnetic resonance monitoring devices are connected with a plurality of data storage boxes in one-to-one correspondence through leads respectively, and the data storage boxes are connected with the power optical cable and the communication optical cable through leads in parallel respectively.
The nuclear magnetic resonance monitoring device comprises a left protective sleeve and a right protective sleeve which are buckled together, and a traction head arranged at the top of the left protective sleeve and the right protective sleeve, wherein a left heat-insulating interlayer and a right heat-insulating interlayer which are buckled together are arranged in the left protective sleeve and the right protective sleeve, a nuclear magnetic resonance instrument is arranged in the left heat-insulating interlayer and the right heat-insulating interlayer, and the nuclear magnetic resonance instrument is connected with the traction head through a lead and is suspended at the position of a central shaft of the left heat-insulating interlayer and the right heat-insulating interlayer.
The on-site monitoring center comprises a temperature control module, a positioning module, a monitoring data operation platform and an early warning system which are integrated together.
Temperature control device include the temperature sensor and the temperature regulation appearance that link to each other with the temperature control module of on-the-spot monitoring center, temperature sensor and temperature regulation appearance establish in the heat preservation interlayer about the nuclear magnetic resonance monitoring devices, the nuclear magnetic resonance appearance operational environment temperature variation of temperature control module according to temperature sensor monitoring assigns the instruction to the temperature regulation appearance in real time, makes operational environment temperature remain stable at 32 +/-1 ℃ within range.
The Beidou positioning device comprises a position sensor connected with a positioning module of the field monitoring center, the position sensor is arranged in a left heat-insulating interlayer and a right heat-insulating interlayer of the nuclear magnetic resonance monitoring device, and the positioning module obtains position information of a positioning monitoring point of the position sensor through a wireless transmission system.
The remote monitoring and control system comprises a remote computer set, a management workstation and an emergency management control end; the remote computer set is provided with client application software and has the functions of recording, replaying and displaying monitoring data by images or animations; the management workstation staff handles and receives alarm information and emergencies caused by uncontrollable factors; the emergency management control end is provided with an emergency shutdown button to prevent unreliable factors from damaging monitoring instruments and equipment.
A method for monitoring the water content of rock soil below an urban traffic main road in real time by using the monitoring system comprises the following steps:
a. before the monitoring work starts, arranging a nuclear magnetic resonance monitoring device, a temperature control device, a Beidou positioning device, a data storage and preprocessing system and a wireless transmission system in an underground urban pipeline comprehensive corridor area, and building a real-time rock soil water content monitoring system below an urban traffic main road;
b. controlling the working environment temperature of the nuclear magnetic resonance instrument to be 32 +/-1 ℃, setting the position information of the monitoring point and the early warning index parameter of the effective porosity of the rock soil, and setting the obtained effective porosity of the rock soil and the abnormal working environment temperature of the nuclear magnetic resonance instrument as early warning values when the road is collapsed or settled by analyzing the accident case of the road collapse or the settlement;
c. when monitoring, a nuclear magnetic resonance instrument arranged in a nuclear magnetic resonance monitoring device is used for monitoring the water content of rock soil below the urban traffic main road in real time; monitoring the temperature change of the working environment of the nuclear magnetic resonance instrument through a temperature sensor arranged in the nuclear magnetic resonance monitoring device; meanwhile, the position information of a monitoring point and the position information of an abnormal water content point of rock and soil are determined by a position sensor arranged in the nuclear magnetic resonance monitoring device; all the monitored data are transmitted to a data storage box for storage through a data line;
d. in the monitoring process, is arranged atA monitoring data operation platform of the on-site monitoring center receives a plurality of monitoring data stored in a plurality of data storage boxes through a data line and preprocesses the received monitoring data; the monitoring data are sorted and classified according to the types of the working environment temperature, the position information of the monitoring points and the transverse relaxation time of the nuclear magnetic resonance, are displayed by graphs and are based on a mathematical model formula
Converting the transverse relaxation time of nuclear magnetic resonance into effective porosity of rock and soil;
in the formula (I), the compound is shown in the specification,
the effective porosity of the rock soil is shown,
for total porosity of rock soil, BVI is a bound fluid coefficient, FFI is a free fluid coefficient, and BVI + FFI represents all fluids;
at the moment, a temperature control module arranged in the on-site monitoring center issues an instruction to a temperature regulator in the nuclear magnetic resonance monitoring device in real time according to the change condition of the working environment temperature of the nuclear magnetic resonance instrument to ensure that the working environment temperature is kept stable within the range of 32 +/-1 ℃, and the measurement precision is improved;
e. uploading the preprocessed monitoring data to a cloud disk database through a wireless transmission system, and monitoring the field condition in real time by a remote user by logging in the cloud disk database;
f. a management workstation worker logs in a cloud disk database through a personal account, checks monitoring data uploaded through a wireless transmission system in real time, and downloads, saves and backups daily monitored field data;
if an alarm signal sent by the early warning system is received, finding out the reason and sending a regulating instruction until the early warning system stops alarming;
if uncontrollable disasters such as fire disasters occur in the underground urban pipeline comprehensive corridor, measures are taken immediately, the emergency shutdown button is operated to close the monitoring system, and a fire-fighting group is organized to extinguish fire, so that damage to monitoring instruments and equipment is avoided.
Based on the calculation result of the monitoring data operation platform, if the effective porosity of the rock and soil approaches to a set early warning value or the working environment temperature of the nuclear magnetic resonance instrument exceeds or is lower than 32 +/-1 ℃, the early warning system sends out an alarm signal and sends alarm information to a management workstation of a remote monitoring and control system through a wireless transmission system, the management workstation determines the alarm reason of the early warning system according to the monitoring data, determines the position of a monitoring point with abnormal monitoring data through a Beidou positioning device and accurately sends out a specific adjusting instruction;
if the working environment temperature of the nuclear magnetic resonance instrument is abnormal, an alarm is triggered, and management workstation workers send an adjusting instruction to a temperature control module in a field monitoring center in a data storage and preprocessing system through a wireless transmission system until the working environment temperature of the nuclear magnetic resonance instrument returns to normal;
if the rock-soil porosity reaches the set early warning value, an alarm is triggered, and a reinforcing measure is taken for the rock-soil body below the main road of the urban traffic to prevent the rock-soil body from collapsing.
The early warning system sends early warning signals to a management workstation of the remote monitoring and control system through a wireless transmission system in a field monitoring center arranged in the data storage and preprocessing system, so that rapid early warning is realized.
Has the advantages that: the invention aims to improve the accuracy and timeliness of monitoring the water content of the rock soil body below the urban traffic main road. By adopting the technical scheme, the problems that the existing rock-soil body water content monitoring cannot meet real-time monitoring and direct testing and the like are solved, the nondestructive testing can be realized by combining the nuclear magnetic resonance technology, the pore structure is sensitive, the direct real-time monitoring can be carried out on the water content of the rock-soil below the main road of urban traffic, the pore signals are directly measured, the hydrological parameters are output, and the operation is simple. The main advantages are as follows:
1. by utilizing the nuclear magnetic resonance monitoring technology, the change condition of the water content of rock soil below the urban traffic main road can be accurately monitored in real time, the pore signals are directly measured, the hydrological parameters are output, and the operation is simple;
2. by adopting a monitoring data operation platform, the calculation amount is greatly simplified, the calculation time is shortened, and the calculation precision is improved;
3. through the '5G' wireless transportation system, a remote user can log in a cloud disk database, check monitoring data in real time and issue instructions to a field monitoring center, so that monitoring timeliness is improved;
4. by adopting the Beidou positioning system, the abnormal points of the monitoring data can be accurately judged, effective measures can be taken in time, and further expansion of damage caused by the erosion effect of underground water is prevented;
5. the temperature control system is adopted to keep the working temperature of the nuclear magnetic resonance instrument at 32 ℃, and the measurement precision is improved.
Drawings
FIG. 1 is a schematic structural diagram of a system for monitoring the water content of rock soil below an urban traffic main road in real time.
Fig. 2 is a schematic structural diagram of the monitoring device of the present invention.
FIG. 3 is a block diagram of the method for monitoring the water content of rock soil below an urban traffic main road in real time.
In the figure: 1-5G wireless transmission base stations; 2-a signal transmitting unit; 3-an optical cable; 4-underground city pipeline comprehensive corridor; 5-an electrical cable; 6-a communication optical cable; 7-a data storage cartridge; 8-a site monitoring center; 9-a temperature control module; 10-a positioning module; 11-monitoring data operation platform; 12-an early warning system; 13-nuclear magnetic resonance monitoring device; 14-a drawing head; 15-left protective sleeve; 16-right protective sleeve; 17-left heat preservation interlayer; 18-right heat preservation interlayer; 19-nuclear magnetic resonance apparatus; 20-a temperature sensor; 21-temperature regulator; 22-position sensor.
Detailed Description
An embodiment of the invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the system for monitoring the water content of rock soil below an urban traffic main road in real time mainly comprises a remote monitoring and control system, a cloud disk database, an electric power optical cable 5, a communication optical cable 6, a nuclear magnetic resonance monitoring device 13, a temperature control device, a Beidou positioning device, a data storage and preprocessing system and a wireless transmission system, wherein the electric power optical cable 5, the communication optical cable 6, the nuclear magnetic resonance monitoring device 13, the temperature control device, the Beidou positioning device, the data storage and preprocessing system and the wireless transmission system are arranged in the area of an underground urban pipeline comprehensive corridor 4; the data storage and preprocessing system is used for monitoring data storage, management and analysis, and comprises an on-site monitoring center 8 arranged in the underground urban pipeline comprehensive corridor 4 and a plurality of data storage boxes 7 connected with data lines of the on-site monitoring center 8, wherein the on-site monitoring center 8 preprocesses a plurality of monitoring data in the data storage boxes 7, the monitoring data are uploaded to a cloud disk database through a wireless transmission system, and a remote monitoring and control system monitors and controls the on-site condition in real time; the wireless transmission system is used for rapidly transmitting monitoring data, early warning signals and monitoring instructions, and comprises a '5G' wireless transmission base station 1 arranged on the ground and a plurality of signal transmitting units 2 arranged at intervals in a roadbed on the upper layer of an underground urban pipeline comprehensive corridor 4, wherein the plurality of signal transmitting units 2 are respectively connected with a power optical cable 5 and a communication optical cable 6 which are arranged in the underground urban pipeline comprehensive corridor 4 through optical cables 3; electric power optical cable 5 and communication optical cable 6 lay at the top of underground city pipeline integrated corridor 4, nuclear magnetic resonance monitoring devices 13 are a plurality of, establish in 4 lower floor's foundations of underground city pipeline integrated corridor with 2 position one-to-one intervals in a plurality of signal transmitting unit, be equipped with temperature control device and big dipper positioner in every nuclear magnetic resonance monitoring devices 13 respectively, a plurality of nuclear magnetic resonance monitoring devices 13 are connected with a plurality of data storage box 7 of one-to-one through the wire respectively, a plurality of data storage box 7 are connected with electric power optical cable 5 and communication optical cable 6 after the wire is parallelly connected respectively.
In this embodiment, the temperature control system is used for maintaining the dynamic temperature balance of the working environment of the nmr monitoring device 13, the nmr monitoring device 13 includes left and right protective sleeves 15 and 16 fastened together, and a traction head 14 disposed at the top of the left and right protective sleeves 15 and 16, left and right heat-insulating interlayers 17 and 18 fastened together are disposed in the left and right protective sleeves 15 and 16, an nmr instrument 19 is disposed in the left and right heat- insulating interlayers 17 and 18, and the nmr instrument 19 is connected with the traction head 14 through a wire and suspended at the central axis positions of the left and right heat-insulating interlayers 17 and 18.
In this embodiment, the on-site monitoring center 8 includes a temperature control module 9, a positioning module 10, a monitoring data operation platform 11 and an early warning system 12 for early warning when monitoring data is abnormal, which are integrated together.
In this embodiment, temperature control device include the temperature sensor 20 and the temperature regulation appearance 21 that link to each other with the temperature control module 9 of on-the-spot monitoring center 8, temperature sensor 20 and temperature regulation appearance 21 establish in heat preservation intermediate layer 17 about nuclear magnetic resonance monitoring devices 13, 18 in, the 19 operational environment temperature variation of nuclear magnetic resonance appearance that temperature control module 9 monitored according to temperature sensor 20 gives the instruction to temperature regulation appearance 21 in real time, make operational environment temperature remain stable at 32 ± 1 ℃ within range, reduce the error that the temperature caused the monitoring result.
In this embodiment, big dipper positioner is used for confirming monitoring point and the position of ground water content abnormal point, and big dipper positioner includes the position sensor 22 that links to each other with the orientation module 10 of on-the-spot monitoring center 8, position sensor 22 establish in heat preservation intermediate layer 17 about nuclear magnetic resonance monitoring devices 13, 18, orientation module 10 obtains the positional information that position sensor 22 fixed a position the monitoring point through wireless transmission system.
In this embodiment, the remote monitoring and control system includes a remote computer set, a management workstation, and an emergency management control end; the remote computer set is provided with client application software and has the functions of recording, replaying and displaying monitoring data by images or animations; the management workstation staff handles and receives alarm information and emergencies caused by uncontrollable factors; the emergency management control end is provided with an emergency shutdown button to prevent unreliable factors from damaging monitoring instruments and equipment.
The invention discloses a method for monitoring the water content of rock soil below an urban traffic main road in real time, which comprises the following specific steps:
a. before the monitoring work starts, arranging a nuclear magnetic resonance monitoring device 13, a temperature control device, a Beidou positioning device, a data storage and preprocessing system and a wireless transmission system in the area of the underground urban pipeline comprehensive corridor 4, and building a real-time rock soil water content monitoring system below an urban traffic main road; the power and communication conditions required by the nuclear magnetic resonance monitoring device 13, the temperature control device, the Beidou positioning device, the data storage and preprocessing system and the wireless transmission system are provided by the power optical cable 5 and the communication optical cable 6 which are arranged in the underground urban pipeline comprehensive corridor 4; the data storage and preprocessing system and the early warning system 12 are arranged in the underground urban pipeline comprehensive corridor 4.
b. Controlling the working environment temperature of the nuclear magnetic resonance instrument 19 to be 32 +/-1 ℃, setting the position information of the monitoring point and the early warning index parameter of the effective porosity of the rock soil, and setting the obtained effective porosity of the rock soil and the abnormal working environment temperature of the nuclear magnetic resonance instrument 19 as early warning values when the road is collapsed or settled by analyzing the accident case of the road collapse or the settlement;
c. when monitoring, a nuclear magnetic resonance instrument 19 arranged in the nuclear magnetic resonance monitoring device 13 is used for monitoring the water content of rock soil below the urban traffic main road in real time; the temperature sensor 20 arranged in the nuclear magnetic resonance monitoring device 13 is used for monitoring the temperature change of the working environment of the nuclear magnetic resonance instrument 19; meanwhile, the position information of a monitoring point and the position information of an abnormal point of the water content of the rock and soil are determined by a position sensor 22 arranged in the nuclear magnetic resonance monitoring device 13; all the monitored data are transmitted to the data storage box 7 through the data line for storage;
d. in the monitoring process, a monitoring data operation platform 11 arranged in the on-site monitoring center 8 receives a plurality of monitoring data stored in a plurality of data storage boxes 7 through a data line and preprocesses the received monitoring data; the monitoring data operation platform 11 is arranged in the field monitoring center 8 in the data storage and preprocessing system, and the monitoring data operation platform 11 preprocesses a plurality of monitoring data in the data storage boxes 7 and displays the monitoring data in a graphic form. The monitoring data are sorted and classified according to the working environment temperature, the position information of the monitoring points and the nuclear magnetic resonance transverse relaxation time of the nuclear magnetic resonance instrument 19, are displayed by graphs and are based on a mathematical model formula
Converting the transverse relaxation time of nuclear magnetic resonance into effective porosity of rock and soil;
in the formula (I), the compound is shown in the specification,
the effective porosity of the rock soil is shown,
for total porosity of rock soil, BVI is a bound fluid coefficient, FFI is a free fluid coefficient, and BVI + FFI represents all fluids;
at this time, the temperature control module 9 arranged in the on-site monitoring center 8 sends an instruction to the temperature regulator 21 in the nuclear magnetic resonance monitoring device 13 in real time according to the change condition of the working environment temperature of the monitored nuclear magnetic resonance instrument 19, so that the working environment temperature is kept stable within the range of 32 +/-1 ℃, and the measurement precision is improved;
e. uploading the preprocessed monitoring data to a cloud disk database through a wireless transmission system, and monitoring the field condition in real time by a remote user by logging in the cloud disk database;
based on the calculation result of the monitoring data operation platform 11, if the effective porosity of the rock and soil approaches to the set early warning value or the working environment temperature of the nuclear magnetic resonance instrument 19 exceeds or is lower than 32 +/-1 ℃, the early warning system 12 sends out an alarm signal, and sends alarm information to a management workstation of a remote monitoring and control system through a wireless transmission system, the management workstation determines the alarm reason of the early warning system 12 according to the monitoring data, determines the position of the abnormal monitoring point of the monitoring data through a Beidou positioning device, and accurately sends out a specific adjusting instruction; the early warning system 12 sends early warning signals to a management workstation of the remote monitoring and control system through a wireless transmission system arranged in the field monitoring center 8 in the data storage and preprocessing system, so that rapid early warning is realized.
If an alarm is triggered due to the abnormal working environment temperature of the nuclear magnetic resonance instrument 19, a management workstation worker sends an adjusting instruction to a temperature control module 9 in a field monitoring center 8 arranged in a data storage and preprocessing system through a wireless transmission system until the working environment temperature of the nuclear magnetic resonance instrument 19 returns to normal;
if the rock-soil porosity reaches the set early warning value, an alarm is triggered, and a reinforcing measure is taken for the rock-soil body below the main road of the urban traffic to prevent the rock-soil body from collapsing.
f. A management workstation worker logs in a cloud disk database through a personal account, checks monitoring data uploaded through a wireless transmission system in real time, and downloads, saves and backups daily monitored field data;
if an alarm signal sent by the early warning system 12 is received, finding out the reason according to the step e and sending a regulating instruction until the early warning system 12 stops giving an alarm;
if uncontrollable disasters such as fire disasters occur in the underground urban pipeline comprehensive corridor 4, measures are immediately taken, the emergency shutdown button is operated to close the monitoring system, and a fire-fighting group is organized to extinguish fire, so that damage to monitoring instruments and equipment is avoided.
Claims (6)
1. The utility model provides a to the city traffic key road below rock soil water content real-time monitoring system, includes remote monitoring and control system and cloud dish database, its characterized in that: the system also comprises an electric power optical cable (5), a communication optical cable (6), a nuclear magnetic resonance monitoring device (13), a temperature control device, a Beidou positioning device, a data storage and preprocessing system and a wireless transmission system which are arranged in the area of the underground urban pipeline comprehensive corridor (4); the data storage and pretreatment system comprises an on-site monitoring center (8) arranged in the underground urban pipeline comprehensive corridor (4) and a plurality of data storage boxes (7) connected with a data line of the on-site monitoring center (8), wherein the on-site monitoring center (8) is used for pretreating a plurality of monitoring data in the plurality of data storage boxes (7), uploading the monitoring data to a cloud disk database through a wireless transmission system, and monitoring and controlling the on-site condition in real time through a remote monitoring and control system; the wireless transmission system comprises a '5G' wireless transmission base station (1) arranged on the ground, and a plurality of signal transmitting units (2) arranged at intervals in a roadbed on the upper layer of the underground urban pipeline comprehensive corridor (4), wherein the plurality of signal transmitting units (2) are respectively connected with a power optical cable (5) and a communication optical cable (6) arranged in the underground urban pipeline comprehensive corridor (4) through optical cables (3); the power optical cable (5) and the communication optical cable (6) are laid on the top of the underground urban pipeline comprehensive corridor (4), the nuclear magnetic resonance monitoring devices (13) are multiple, the nuclear magnetic resonance monitoring devices and the signal transmitting units (2) are arranged in the lower foundation of the underground urban pipeline comprehensive corridor (4) at intervals in a one-to-one correspondence mode, a temperature control device and a Beidou positioning device are respectively arranged in each nuclear magnetic resonance monitoring device (13), the nuclear magnetic resonance monitoring devices (13) are respectively connected with the data storage boxes (7) in a one-to-one correspondence mode through leads, and the data storage boxes (7) are respectively connected with the power optical cable (5) and the communication optical cable (6) after being connected in parallel through leads;
the Beidou positioning device comprises a position sensor (22) connected with a positioning module (10) of a field monitoring center (8), the position sensor (22) is arranged in a left heat-insulating interlayer (17) and a right heat-insulating interlayer (18) of a nuclear magnetic resonance monitoring device (13), and the positioning module (10) obtains position information of a positioning monitoring point of the position sensor (22) through a wireless transmission system;
the remote monitoring and control system comprises a remote computer set, a management workstation and an emergency management control end; the remote computer set is provided with client application software and has the functions of recording, replaying and displaying monitoring data by images or animations; the management workstation staff handles and receives alarm information and emergencies caused by uncontrollable factors; the emergency management control end is provided with an emergency shutdown button to prevent unreliable factors from damaging monitoring instruments and equipment;
in the monitoring process, a monitoring data operation platform (11) arranged in an on-site monitoring center (8) receives a plurality of monitoring data stored in a plurality of data storage boxes (7) through a data line and preprocesses the received monitoring data; the monitoring data are sorted and classified according to the working environment temperature, the position information of the monitoring points and the nuclear magnetic resonance transverse relaxation time of the nuclear magnetic resonance instrument (19), are displayed by graphs and are based on a mathematical model formula
Converting the transverse relaxation time of nuclear magnetic resonance into effective porosity of rock and soil;
in the formula (I), the compound is shown in the specification,
the effective porosity of the rock soil is shown,
for total porosity of the rock soil, BVI is the coefficient of bound fluid, FFI is the coefficient of free fluid, and BVI + FFI represents the total fluid.
2. The system for monitoring the water content of rock soil below the urban traffic main road in real time according to claim 1, wherein the system comprises: nuclear magnetic resonance monitoring devices (13) including the lock lag tube (15,16) about together, establish and protect the tractor (14) at lag tube (15,16) top about, be equipped with the lock heat preservation intermediate layer (17,18) about together in the lag tube (15,16) about, be equipped with nuclear magnetic resonance appearance (19) in the heat preservation intermediate layer (17,18) about, nuclear magnetic resonance appearance (19) link to each other with tractor (14) through the wire, suspend in midair about heat preservation intermediate layer (17,18) central axis position.
3. The system for monitoring the water content of rock soil below the urban traffic main road in real time according to claim 1, wherein the system comprises: the on-site monitoring center (8) comprises a temperature control module (9), a positioning module (10), a monitoring data operation platform (11) and an early warning system (12) which are integrated together.
4. The system for monitoring the water content of rock soil below the urban traffic main road in real time according to claim 1, wherein the system comprises: temperature control device include temperature sensor (20) and temperature regulation appearance (21) that link to each other with temperature control module (9) at on-site monitoring center (8), temperature sensor (20) and temperature regulation appearance (21) establish in heat preservation intermediate layer (17,18) about nuclear magnetic resonance monitoring devices (13), temperature control module (9) are according to nuclear magnetic resonance appearance (19) operational environment temperature variation of temperature sensor (20) monitoring, give the instruction to temperature regulation appearance (21) in real time, make operational environment temperature remain stable at 32 +/-1 ℃ within range.
5. A method for monitoring the water content of rock soil below an urban traffic main road in real time by using the monitoring system of any one of claims 1 to 4, which is characterized by comprising the following steps:
a. before monitoring work begins, arranging a nuclear magnetic resonance monitoring device (13), a temperature control device, a Beidou positioning device, a data storage and preprocessing system and a wireless transmission system in an underground urban pipeline comprehensive corridor (4), and building a real-time rock soil water content monitoring system below an urban traffic main road;
b. controlling the working environment temperature of the nuclear magnetic resonance instrument (19) to be 32 +/-1 ℃, setting the position information of the monitoring point and the early warning index parameter of the effective porosity of the rock and soil, and setting the obtained effective porosity of the rock and soil and the abnormal working environment temperature of the nuclear magnetic resonance instrument (19) as early warning values when the road is collapsed or settled by analyzing the accident case of the road collapse or the settlement;
c. when monitoring, a nuclear magnetic resonance instrument (19) arranged in a nuclear magnetic resonance monitoring device (13) is used for monitoring the water content of rock soil below the urban traffic main road in real time; the temperature change of the working environment of the nuclear magnetic resonance instrument (19) is monitored by a temperature sensor (20) arranged in the nuclear magnetic resonance monitoring device (13); meanwhile, the position information of a monitoring point and the position information of an abnormal rock-soil water content are determined through a position sensor (22) arranged in a nuclear magnetic resonance monitoring device (13); all the monitored data are transmitted to a data storage box (7) through a data line for storage;
d. in the monitoring process, a monitoring data operation platform (11) arranged in an on-site monitoring center (8) receives a plurality of monitoring data stored in a plurality of data storage boxes (7) through a data line and preprocesses the received monitoring data; the monitoring data are sorted and classified according to the working environment temperature, the position information of the monitoring points and the nuclear magnetic resonance transverse relaxation time of the nuclear magnetic resonance instrument (19), are displayed by graphs and are based on a mathematical model formula
Converting the transverse relaxation time of nuclear magnetic resonance into effective porosity of rock and soil;
in the formula (I), the compound is shown in the specification,
the effective porosity of the rock soil is shown,
for total porosity of rock soil, BVI is a bound fluid coefficient, FFI is a free fluid coefficient, and BVI + FFI represents all fluids;
at the moment, a temperature control module (9) arranged in the on-site monitoring center (8) issues an instruction to a temperature regulator (21) in the nuclear magnetic resonance monitoring device (13) in real time according to the change condition of the working environment temperature of the monitored nuclear magnetic resonance instrument (19), so that the working environment temperature is kept stable within the range of 32 +/-1 ℃, and the measurement precision is improved;
e. uploading the preprocessed monitoring data to a cloud disk database through a wireless transmission system, and monitoring the field condition in real time by a remote user by logging in the cloud disk database;
f. a management workstation worker logs in a cloud disk database through a personal account, checks monitoring data uploaded through a wireless transmission system in real time, and downloads, saves and backups daily monitored field data;
if an alarm signal sent by the early warning system (12) is received, finding out the reason and sending a regulating instruction until the early warning system (12) stops alarming; the early warning system (12) sends early warning signals to a management workstation of a remote monitoring and control system through a wireless transmission system in a field monitoring center (8) arranged in the data storage and preprocessing system, so that rapid early warning is realized.
If uncontrollable disasters such as fire disasters occur in the underground urban pipeline comprehensive corridor (4), measures are taken immediately, the emergency shutdown button is operated to close the monitoring system, and a fire-fighting group is organized to extinguish fire, so that damage to monitoring instruments and equipment is avoided.
6. The method for monitoring the water content of rock soil below the urban traffic main road in real time according to claim 5, wherein the method comprises the following steps: based on the calculation result of the monitoring data operation platform (11), if the effective porosity of the rock and soil approaches to a set early warning value or the working environment temperature of the nuclear magnetic resonance instrument (19) exceeds or is lower than 32 +/-1 ℃, the early warning system (12) sends out an alarm signal and sends alarm information to a management workstation of a remote monitoring and control system through a wireless transmission system, the management workstation determines the alarm reason of the early warning system (12) according to the monitoring data, determines the abnormal monitoring point position of the monitoring data through a Beidou positioning device and accurately sends a specific adjusting instruction;
if the working environment temperature of the nuclear magnetic resonance instrument (19) is abnormal, an alarm is triggered, and a management workstation worker sends an adjusting instruction to a temperature control module (9) arranged in a field monitoring center (8) in the data storage and preprocessing system through a wireless transmission system until the working environment temperature of the nuclear magnetic resonance instrument (19) returns to normal;
if the rock-soil porosity reaches the set early warning value, an alarm is triggered, and a reinforcing measure is taken for the rock-soil body below the main road of the urban traffic to prevent the rock-soil body from collapsing.
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