阅读说明：本技术 岩土工程路基沉降自动监测系统以及监测方法 (Geotechnical engineering roadbed settlement automatic monitoring system and monitoring method ) 是由 刘婷婷 黄文旭 李闯闯 王婧 李新平 郭运华 于 2021-01-08 设计创作，主要内容包括：本发明公开了一种岩土工程路基沉降自动监测系统以及监测方法,监测系统包括沉降底板；升降管,具有管体和管头,管体包括多个从外到内逐个套设的接管,管头设置在管体顶部,最外周接管的底部与沉降板固定连接,管头的顶部设置有第一测距传感器；驱动装置,用于驱动接管由外到内依次伸出；后视点测距传感器,设置在待填充地基侧部的设置点,后视点测距传感器与第一测距传感器对接以测量管头与设置点之间的直线距离以及倾斜角度；无线发射组件,与第一测距传感器及后视点测距传感器通讯连接；数据接收处理装置,以处理接收到的距离或角度信息。通过一定间隔时长进行两次测量即可得到间隔时间内管头标高的差值,实现了沉降底板沉降的自动化监测。(The invention discloses an automatic monitoring system and a monitoring method for geotechnical engineering subgrade settlement, wherein the monitoring system comprises a settlement bottom plate; the lifting pipe is provided with a pipe body and a pipe head, the pipe body comprises a plurality of connecting pipes which are sleeved one by one from outside to inside, the pipe head is arranged at the top of the pipe body, the bottom of the outermost connecting pipe is fixedly connected with the settling plate, and the top of the pipe head is provided with a first distance measuring sensor; the driving device is used for driving the connecting pipe to sequentially extend from outside to inside; the rear viewpoint ranging sensor is arranged at a set point on the side part of the foundation to be filled, and is in butt joint with the first ranging sensor to measure the linear distance and the inclination angle between the pipe head and the set point; the wireless transmitting assembly is in communication connection with the first ranging sensor and the rear viewpoint ranging sensor; and the data receiving and processing device is used for processing the received distance or angle information. The difference of the heights of the pipe headers in the interval time can be obtained by measuring twice at a certain interval time, and the automatic monitoring of the sedimentation bottom plate is realized.)

1. Geotechnical engineering road bed settlement automatic monitoring system, its characterized in that includes:

the sedimentation bottom plate is placed on the bottom surface of the foundation to be filled;

the lifting pipe is provided with a pipe body and a pipe head, the pipe body is a hollow pipe body, the pipe body comprises a plurality of connecting pipes which are sleeved one by one from outside to inside, the connecting pipe positioned on the inner side vertically extends upwards compared with the connecting pipe positioned on the outer side, the pipe head is arranged at the top of the pipe body, the bottom of the connecting pipe sleeved on the outermost periphery is fixedly connected with the settling plate, and the top of the pipe head is at least provided with two first distance measuring sensors;

the driving device is used for driving the connecting pipe to sequentially extend from outside to inside;

the rear viewpoint ranging sensors are arranged at a set point above the side part of the foundation to be filled, and are in butt joint with the first ranging sensors so as to measure the linear distance between the pipe head and the set point and the inclination angle of the straight line;

the wireless transmitting assembly is in communication connection with the first ranging sensor and the rear viewpoint ranging sensor so as to send the collected distance information and the collected angle information; and

and the data receiving and processing device is in communication connection with the wireless transmitting assembly so as to process the received distance information or angle information.

2. The geotechnical engineering subgrade settlement automatic monitoring system according to claim 1, characterized in that: the periphery of tube head is provided with two at least second range finding sensors towards the horizontal direction, second range finding sensor is used for measuring the distance of horizontal direction and filling soil, second range finding sensor with wireless transmission subassembly communication is connected to the distance information that sends the collection.

3. The geotechnical engineering subgrade settlement automatic monitoring system according to claim 1, characterized in that: the bottom of tube head is provided with the orientation subsides the third distance measuring sensor of bottom plate, it is located to be provided with on the bottom plate to subside the internal range finding accepting point of tube, third distance measuring sensor with wireless transmission subassembly communication is connected to send the distance information who gathers.

4. The geotechnical subgrade settlement automatic monitoring system according to any one of claims 1 to 3, characterized in that: a plurality of sedimentation bottom plates are arranged on the bottom surface of the foundation to be filled at intervals, and the sedimentation bottom plates are fixedly connected with lifting pipes.

5. The geotechnical subgrade settlement automatic monitoring system according to any one of claims 1 to 3, characterized in that: the driving device comprises a power source, a rotating screw, a first rotating disc and a second rotating disc, wherein the upper end of the rotating screw is provided with a first thread in a first spiral direction, the lower end of the rotating screw is provided with a second thread in a second spiral direction, the first spiral direction and the second spiral direction are opposite, the first rotating disc is sleeved at the upper end of the rotating screw, the second rotating disc is sleeved at the lower end of the rotating screw, a clamping groove is formed in the inner side wall of the connecting pipe, the connecting pipe sleeved on the inner periphery is stopped at the connecting pipe on the outer periphery through the clamping groove, the second rotating disc is abutted against the clamping groove of the connecting pipe on the outer periphery, the first rotating disc abuts against the bottom of the inner periphery, the power source drives the rotating screw to rotate forwards or backwards, and the first rotating disc and the second rotating disc move relatively or far away from.

6. A monitoring method of an automatic geotechnical engineering roadbed settlement monitoring system, which is used for monitoring by the automatic geotechnical engineering roadbed settlement monitoring system according to any one of claims 1-5, and is characterized by comprising the following steps:

measure for the first time through first range sensor and back viewpoint range sensor the tube head with linear distance between the setpoint and the inclination of straight line, calculate the first elevation H of tube head through data reception processing apparatus₁；

After a period of time, the linear distance between the tube head and the set point and the inclination angle of the straight line are measured again by the first distance measuring sensor and the rear viewpoint distance measuring sensor, and the data receiving and processing device calculatesSecond elevation H of the tip₂，H₁-H₂Obtaining the settlement amount of the settlement bottom plate in the measuring time interval at two sides;

the drive arrangement drive take over by outer stretching out in proper order to improve as required the elevation of tube head avoids filling up soil and buries the tube head.

Technical Field

The invention relates to the field of monitoring and measuring subgrade filling settlement, in particular to an automatic monitoring system and a monitoring method for geotechnical engineering subgrade settlement.

Background

When the soft foundation is filled, in order to control the settlement rate and the total settlement of the foundation, a settlement plate is buried and observed according to a certain observation frequency, so that the construction is guided. Whether a settling pipe needs to be additionally arranged or not is checked at intervals or is informed in advance by filling personnel so as to prevent the settling plate from being scrapped in advance when being buried.

Before the settling pipe is additionally arranged, a monitoring worker can obtain the absolute elevation of the pipe orifice by using a total station or a level gauge for the first observation, and the elevation of the bottom of the plate can be obtained by calculation; and (3) after the pipe is taken over, monitoring personnel can obtain the absolute elevation of the pipe orifice after the pipe is taken over by using a total station or a level gauge for the second observation, the absolute elevation of the ground surface of the road is obtained through calculation, and the length from the plate bottom to the pipe opening prism, namely the length of the settling pipe, can be calculated through calculation.

The conventional roadbed settlement plate monitoring means depends on manual inspection and pipe connection, cannot realize automatic pipe connection of the settlement pipe, and is easily covered during soil filling. When a large amount of soil is filled, a person needs to specially watch the settling pipe. More advanced fiber monitoring approaches do not work well because of the high fill requirements.

The data can not be automatically collected, automatically processed and intelligently analyzed depending on manual data observation, data processing and data analysis. The data measurement has larger error and higher requirement on professional skills of personnel; the data processing data volume is large, the calculation steps are multiple, the data processing is slow, and the feedback efficiency is low; the requirement on professional experience of personnel is high during data analysis.

The monitoring of the settlement plate is greatly influenced by weather, data are not observed in time after construction in rainy seasons, personnel can get in and out of the site to be blocked due to one rain burst or rainstorm, the monitoring frequency required by the standard can not be reached, and suggestions can not be fed back in time to guide construction.

The potential safety hazard exists in manual monitoring, and the human cost is high. Therefore, a set of automatic equipment is needed for roadbed settlement, and the roadbed settlement monitoring device with wireless data transmission, intelligent analysis and real-time feedback is realized.

Disclosure of Invention

The invention aims to solve at least one of the problems in the background art, and provides an automatic monitoring system and a monitoring method for geotechnical engineering subgrade settlement, which can realize automatic climbing of a lifting pipe and acquire the elevation of a plate bottom in real time so as to realize automatic monitoring.

The technical scheme adopted by the invention is as follows: an automatic monitoring system for geotechnical engineering subgrade settlement comprises:

the sedimentation bottom plate is placed on the bottom surface of the foundation to be filled;

the lifting pipe is provided with a pipe body and a pipe head, the pipe body is a hollow pipe body, the pipe body comprises a plurality of connecting pipes which are sleeved one by one from outside to inside, the connecting pipe positioned on the inner side vertically extends upwards compared with the connecting pipe positioned on the outer side, the pipe head is arranged at the top of the pipe body, the bottom of the connecting pipe sleeved on the outermost periphery is fixedly connected with the settling plate, and the top of the pipe head is at least provided with two first distance measuring sensors;

the driving device is used for driving the connecting pipe to sequentially extend from outside to inside;

the rear viewpoint ranging sensors are arranged at a set point above the side part of the foundation to be filled, and are in butt joint with the first ranging sensors so as to measure the linear distance between the pipe head and the set point and the inclination angle of the straight line;

the wireless transmitting assembly is in communication connection with the first ranging sensor and the rear viewpoint ranging sensor so as to send the collected distance information and the collected angle information; and

and the data receiving and processing device is in communication connection with the wireless transmitting assembly so as to process the received distance information or angle information.

Further, the periphery of tube head is provided with two at least second range finding sensors towards the horizontal direction, second range finding sensor is used for measuring the distance of horizontal direction and filling soil, second range finding sensor with wireless transmission subassembly communication is connected to the distance information that sends the collection.

Further, the bottom of tube head is provided with the orientation subside the third range sensor of bottom plate, it is located to be provided with on the bottom plate to subside range finding accepting point in the tube body, third range sensor with wireless transmission subassembly communication is connected to send the distance information who gathers.

Furthermore, a plurality of sedimentation bottom plates are arranged on the bottom surface of the foundation to be filled at intervals, and the sedimentation bottom plates are fixedly connected with lifting pipes.

Further, the driving device comprises a power source, a rotating screw, a first rotating disc and a second rotating disc, wherein the upper end of the rotating screw is provided with a first thread in a first spiral direction, the lower end of the rotating screw is provided with a second thread in a second spiral direction, the first spiral direction and the second spiral direction are arranged in opposite directions, the first rotating disc is sleeved at the upper end of the rotating screw, the second rotating disc is sleeved at the lower end of the rotating screw, a clamping groove is formed in the inner side wall of the connecting tube, the connecting tube sleeved on the inner periphery is stopped at the connecting tube on the outer periphery through the clamping groove, the second rotating disc is abutted against the clamping groove of the connecting tube on the outer periphery, the first rotating disc abuts against the bottom of the connecting tube on the inner periphery, and the power source drives the rotating screw to rotate forwards or reversely so that the first rotating disc and the second rotating disc.

The monitoring method of the geotechnical engineering roadbed settlement automatic monitoring system is used for monitoring, and comprises the following steps:

measure for the first time through first range sensor and back viewpoint range sensor the tube head with linear distance between the setpoint and the inclination of straight line, calculate the first elevation H of tube head through data reception processing apparatus₁；

After a period of time, the first distance measuring sensor and the rear viewpoint are connectedThe distance measuring sensor measures the tube head again, the linear distance between the set points and the linear inclination angle, and the second elevation H of the tube head is calculated through the data receiving and processing device₂，H₁-H₂Obtaining the settlement amount of the settlement bottom plate in the measuring time interval at two sides;

the drive arrangement drive take over by outer stretching out in proper order to improve as required the elevation of tube head avoids filling up soil and buries the tube head.

Has the advantages that: the linear distance between the pipe head and a setting point above the side part of the foundation to be filled is measured by the first distance measuring sensor and the rear viewpoint distance measuring sensor together to form an included angle with the horizontal direction, and the elevation of the pipe head is calculated by the data receiving and processing device. Therefore, the difference value of the heights of the pipe headers in the interval time can be obtained by measuring twice at a certain interval time, the sedimentation amount of the sedimentation bottom plate is further determined, the numerical values such as the sedimentation rate and the like can be further obtained according to the sedimentation amount, and the automatic monitoring of the sedimentation bottom plate is further realized.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a schematic structural diagram of an automatic monitoring system for geotechnical engineering subgrade settlement according to an embodiment of the invention;

fig. 2 is a schematic structural view of the driving device disposed in the connecting pipe.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 and 2, an embodiment of the present invention provides an automatic geotechnical engineering subgrade settlement monitoring system, which includes a settlement bottom plate 200, an elevator pipe 100, a driving device 300, a rear viewpoint distance measuring sensor 450, a wireless transmitting assembly, and a data receiving and processing device. Wherein the settling floor 200 is placed on the bottom surface of the foundation to be filled; the lifting pipe 100 is provided with a pipe body 120 and a pipe head 110, the pipe body 120 is a hollow pipe body 120, the pipe body 120 comprises a plurality of connecting pipes which are sleeved one by one from outside to inside, the connecting pipe positioned on the inner side can vertically extend upwards compared with the connecting pipe positioned on the outer side, the pipe head 110 is arranged at the top of the pipe body 120, the bottom of the connecting pipe sleeved on the outermost periphery is fixedly connected with a settling plate, and the top of the pipe head 110 is provided with two first distance measuring sensors 410; the driving device 300 is used for driving the connecting pipe to sequentially extend from outside to inside so as to adjust the elevation of the pipe head 110 as required. The number of the rear viewpoint distance measuring sensors 450 is two, the rear viewpoint distance measuring sensors 450 are respectively arranged at the setting points above the left and right sides of the foundation to be filled, and the rear viewpoint distance measuring sensors 450 are arranged in a butt joint manner with the first distance measuring sensors 410 so as to measure the linear distance between the pipe head 110 and the setting points and the inclination angle of the straight line; the wireless transmitting component is respectively in communication connection with the first ranging sensor 410 and the rear viewpoint ranging sensor 450 to transmit the collected distance information and angle information; the data receiving and processing device is in communication connection with the wireless transmitting assembly so as to process the received distance information or angle information.

In the geotechnical engineering subgrade settlement automatic monitoring system, the linear distance between the pipe head 110 and a set point above the side part of the foundation to be filled is measured by the first distance measuring sensor 410 and the rear viewpoint distance measuring sensor 450 together to form an included angle with the horizontal direction, and then the elevation of the pipe head 110 is calculated by the data receiving and processing device. Therefore, the difference value of the elevation of the tube head 110 in the interval time can be obtained by measuring twice at a certain interval time, the settlement amount of the settlement bottom plate 200 is further determined, the numerical values such as the settlement rate and the like can be further obtained according to the settlement amount, and the automatic monitoring of the settlement bottom plate 200 is further realized.

Preferably, the pipe head 110 is provided at the outer circumference thereof with two second distance measuring sensors 420 facing the horizontal direction, the second distance measuring sensors 420 are used for measuring the distance from the filling soil 10 in the horizontal direction, and the second distance measuring sensors 420 are in communication connection with the wireless transmission assembly to transmit the collected distance information.

Specifically, in this embodiment, when the distance measured by the second distance measuring sensor 420 is less than 50cm, the driving device 300 may drive the pipe body 120 to extend upwards.

Further preferably, the bottom of the pipe head 110 is provided with a third distance measuring sensor 430 facing the sedimentation base plate 200, the sedimentation base plate 200 is provided with a distance measuring receiving point 440 located in the pipe body 120, and the third distance measuring sensor 430 is in communication connection with the wireless transmitting assembly to transmit the acquired distance information. Information of the distance measured twice in the interval by the third ranging sensor 430 can be used to verify the accuracy of the settling amount of the settling floor 200.

Meanwhile, in this embodiment, two sedimentation bottom plates 200 are placed on the bottom surface of the foundation to be filled at intervals, and the sedimentation bottom plates 200 are both fixedly connected with the elevator pipes 100. Therefore, the method is suitable for monitoring the settlement of the filling foundation with a large area in real time, and is beneficial to obtaining more accurate data.

It should be understood that the driving device 300 of the present invention is used for driving the connecting tubes to extend from outside to inside in sequence. Specifically, with continued reference to fig. 2, the drive means includes a power source, a rotary screw 310, a first turntable 320, and a second turntable 330. The upper end of the rotary screw 310 is provided with a first thread in a first spiral direction, the lower end of the rotary screw 310 is provided with a second thread in a second spiral direction, the first spiral direction and the second spiral direction are opposite, the first rotary disc 320 is sleeved on the upper end of the rotary screw 310, and the second rotary disc 330 is sleeved on the lower end of the rotary screw 310. The power source may be a motor, which is connected to the rotating screw 310 and drives the rotating screw 310 to rotate. Since the first and second threads have opposite spiral directions, the first and second rotary discs 320 and 330 can move relatively or reversely when the rotary screw 310 rotates. The inner side wall of the connecting pipe is provided with a clamping groove 121 for clamping the connecting pipe sleeved inside. The clamping groove 121 can realize one-way limiting, and the connecting pipe can only extend upwards. The principle of the slot 121 is similar to a nylon cable tie or a plastic buckle. The adapter tube sleeved on the inner periphery is stopped at the adapter tube on the outer periphery through the clamping groove 121.

The driving device 300 is installed inside the adapter tube, the second rotating disc 330 abuts against the clamping groove 121 of the outer circumference adapter tube, the first rotating disc 320 abuts against the bottom of the inner circumference adapter tube, and the power source drives the rotating screw 310 to rotate forward or backward, so that the first rotating disc 320 and the second rotating disc 330 move relatively or far away.

Two mutually sleeved connecting pipes are taken as an example for explanation: when the power source drives the rotary screw 310 to rotate forward, the second rotating disc 330 abuts against the clamping groove 121 on the inner wall of the outer periphery connecting pipe, the second rotating disc 330 is limited to move downwards, and the rotary screw 310 moves upwards relative to the second rotating disc 330. Meanwhile, the first rotary disc 320 abuts against the bottom of the inner circumference adapter tube, on one hand, the first rotary disc 320 ascends along with the rotary screw 310 to push the inner circumference adapter tube to extend upwards, and after the inner circumference adapter tube extends out, the inner circumference adapter tube stops moving through the clamping groove 121, so that the upward extension of the adapter tube is completed. The power source drives the rotary screw 310 to rotate reversely, and the first rotating disc 320 and the second rotating disc 330 are relatively close to each other for the next jacking of the connecting pipe. The screw 310 is driven to rotate forward and backward for multiple times, so that the inner circumference connecting pipe can extend upwards for multiple times.

The monitoring method of the geotechnical engineering subgrade settlement automatic monitoring system uses the geotechnical engineering subgrade settlement automatic monitoring system for monitoring, and comprises the following steps:

the linear distance between the pipe head 110 and the set point and the inclination angle of the straight line are firstly measured by the first distance measuring sensor 410 and the rear viewpoint distance measuring sensor 450, and the first altitude H of the pipe head 110 is calculated by the data receiving and processing device₁；

After a period of time, the linear distance between the pipe head 110 and the set point and the inclination angle of the straight line are measured again through the first distance measuring sensor 410 and the rear viewpoint distance measuring sensor 450, and the second elevation H2, H1-H2 of the pipe head 110 is calculated through the data receiving and processing device to obtain the settlement amount of the settlement bottom plate 200 in the time interval of measuring the two sides;

the driving unit 300 drives the connection pipes to sequentially extend from the outside to the inside, so as to increase the elevation of the pipe head 110 as required, and prevent the filling soil 10 from burying the pipe head 110.

When the filling height reaches the design value, the driving device 300 pulls the settling pipe to climb, the pipe head 110 and the rear viewpoint measure the distance, and then the real-time elevation of the settling bottom plate 200 is calculated. The automatic monitoring device overcomes the defects that the lifting pipe 100 is scrapped in advance due to the fact that manual pipe connection is time-consuming and labor-consuming, and the pipe cannot be connected in time, and meanwhile achieves the purpose of automatic monitoring.

The invention realizes the integration of pipe taking, observation, data processing and opinion feedback, has no humanization in the whole process except for embedding equipment and post-construction viewpoint, and realizes the real-time roadbed settlement monitoring and construction environment monitoring.

While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.