CN113008200A

CN113008200A - Roadbed settlement multilayer monitoring structure and monitoring method

Info

Publication number: CN113008200A
Application number: CN202110256039.XA
Authority: CN
Inventors: 徐文远; 李珂珂; 王浩; 郑学文
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-06-22

Abstract

The invention discloses a roadbed settlement multilayer monitoring structure and a roadbed settlement multilayer monitoring method, and relates to the technical field of roadbed monitoring. During operation makes measuring probe remove to the other end by the one end of section sedimentation pipe through pulling haulage rope, and measuring probe will survey data transmission and obtain the settlement value of every node in each soil layer through handling to data acquisition and processing device, can satisfy the needs that monitoring road bed section subsided and the layering subsides simultaneously, does not have the influence to the road bed construction, and the practicality is stronger.

Description

Roadbed settlement multilayer monitoring structure and monitoring method

Technical Field

The invention relates to the technical field of roadbed monitoring, in particular to a roadbed settlement multilayer monitoring structure and a roadbed settlement multilayer monitoring method.

Background

In the construction and maintenance work of the highway, subgrade settlement is a frequent road surface damage phenomenon, particularly a soft soil foundation road section, the driving quality of the highway and the traffic safety of vehicles are seriously influenced, and the service life of the highway is also greatly influenced. Due to the wide range of operators and the very complicated geological conditions, the method puts high requirements on the construction and maintenance work of the highway. In the process of highway construction, subgrade settlement can be caused by various factors such as soft foundations, bad subgrades, high fill embankments, steep slope embankments and the like, and the main reasons for the subgrade settlement are the complex and bad geological conditions and the shortening of the construction period for accelerating the highway construction. The subgrade settlement damages the stability of a highway subgrade structure, can cause pavement cracking or uneven pits, accelerates the damage of the highway, influences the service life and the driving quality of the highway and causes great traffic safety hidden troubles. The research of strengthening the roadbed settlement monitoring technology is very important for improving the construction and maintenance quality of the highway.

At present, with the development of monitoring technology, more and more roadbed settlement monitoring methods are available. The method comprises a settlement plate method, wherein the settlement plate comprises a bottom plate, a PVC pipe and a metal measuring rod. The base plate is horizontal to the datum line and is embedded into the roadbed, and the roadbed subsides along with the settlement of the roadbed, so that the monitoring is carried out. The metal measuring rod is perpendicular to the bottom plate and used for measuring the sedimentation value, the metal measuring rod can be lengthened or shortened according to the measured depth, the height of the metal measuring rod is recorded after the metal measuring rod is embedded into the sedimentation plate, the height of the metal measuring rod is measured at a later period, and the difference value between measured data is the sedimentation value of a measuring point. The PVC pipe is used for protecting the metal measuring rod, and the metal measuring rod is prevented from being corroded and damaged to influence monitoring accuracy. The monitoring technology is low in construction cost, simple in construction process, high in monitoring precision, convenient to monitor and operate and suitable for monitoring the surface layer settlement of the roadbed. However, the top end of the metal measuring rod is exposed to the road surface for a long time and is easy to damage to influence the monitoring accuracy. In the construction process, the settlement plate needs to be embedded into the foundation in advance, so that the foundation is possibly insufficiently compacted, and the quality of the foundation is influenced; secondly, in order to avoid damaging the settlement plate, the construction needs to avoid the burying area of the settlement plate, which affects the construction progress; finally, it is difficult to take remedial action after the settlement plate is damaged.

Disclosure of Invention

In order to solve the technical problems, the invention provides a roadbed settlement multilayer monitoring structure and a roadbed settlement multilayer monitoring method, which simultaneously meet the requirements of monitoring roadbed section settlement and layered settlement, have no influence on roadbed construction and have strong practicability.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a roadbed settlement multi-layer monitoring structure which comprises a roadbed, a data acquisition and processing device and a plurality of section settlement monitoring devices, wherein the roadbed comprises a plurality of soil layers which are sequentially arranged from bottom to top, each section settlement monitoring device comprises a section settling tube, a measuring probe and a traction rope, one section settling tube is arranged in each soil layer, the plurality of section settling tubes are corresponding in position in the vertical direction, the traction ropes are used for driving the measuring probes to move in the section settling tubes, and the measuring probes are connected with the data acquisition and processing device.

Preferably, the section settling tube further comprises a guide wheel, a guide groove matched with the guide wheel structure is formed in the inner wall of the section settling tube, the measuring probe is installed on the guide wheel, and the traction rope is connected with the guide wheel.

Preferably, the cross-sectional settling tube is a U-shaped tube.

Preferably, the roadbed comprises three soil layers, wherein the three soil layers are a first powdery clay layer, a broken soil layer and a second powdery clay layer which are sequentially arranged from bottom to top.

Preferably, the longitudinal section of the roadbed is trapezoidal.

The invention also provides a monitoring method based on the roadbed settlement multilayer monitoring structure, which comprises the following steps:

step one, pre-embedding the section settling pipes at the monitoring position of each soil layer to enable the plurality of section settling pipes to be corresponding in position in the vertical direction;

step two, penetrating one traction rope into each section settling tube to enable the traction rope to extend out of two ends of each section settling tube;

thirdly, mounting one measuring probe at one end of the traction rope, connecting the measuring probe with the data acquisition and processing device, and moving the measuring probe from one end of the profile settling tube to the other end of the profile settling tube by pulling the other end of the traction rope;

and step four, the measuring probe transmits the measured data to a data acquisition and processing device to be processed to obtain a settlement value of each node in each soil layer.

Compared with the prior art, the invention has the following technical effects:

the invention provides a roadbed settlement multi-layer monitoring structure and a roadbed settlement multi-layer monitoring method. When the section settling pipe works, a traction rope is inserted into each section settling pipe, so that the traction rope extends out of two ends of each section settling pipe; a measuring probe is arranged at one end of the traction rope, and the measuring probe is moved from one end of the section settling tube to the other end by pulling the other end of the traction rope; the measuring probe is used for transmitting measured data to the data acquisition and processing device to obtain the settlement value of each node in each soil layer through processing, the overall settlement rule of the whole section can be monitored, the settlement amount of different soil layers can be measured, the requirements of monitoring subgrade section settlement and layered settlement are met, the operation is simple, the cost is low, no influence is caused on subgrade construction, the external environment has no influence on the monitoring technology, and the practicability is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a cross-sectional view of a subgrade settlement multi-layer monitoring structure provided by the present invention;

fig. 2 is a top view of the roadbed settlement multi-layer monitoring structure provided by the invention.

Description of reference numerals: 100. a roadbed settlement multi-layer monitoring structure; 1. a section settling tube; 101. bending the pipe section; 102. a straight pipe section; 2. a hauling rope; 3. a first powdery clay layer; 4. crushing a soil layer; 5. a second powdery clay layer; 6. a argillaceous clay matrix layer; 7. a powdery clay matrix layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a roadbed settlement multilayer monitoring structure and a roadbed settlement multilayer monitoring method, which can meet the requirements of monitoring roadbed profile settlement and layered settlement, have no influence on roadbed construction and have strong practicability.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 and fig. 2, this embodiment provides a subgrade settlement multilayer monitoring structure 100, including the subgrade, data acquisition and processing device and a plurality of section settlement monitoring device, the subgrade includes a plurality of soil layers that set gradually from bottom to top, section settlement monitoring device includes section settling leg 1, measuring probe and haulage rope 2, be provided with a section settling leg 1 in each soil layer, a plurality of section settling legs 1 are corresponding in position on vertical direction, haulage rope 2 is arranged in driving measuring probe and removes in section settling leg 1, measuring probe and data acquisition and processing device are connected. Specifically, the data acquisition and processing device in this embodiment is a conventional data acquisition and processing device in the field of roadbed monitoring.

The section settling tube comprises a section settling tube 1, and is characterized by further comprising a guide wheel, wherein a guide groove matched with the guide wheel structure is formed in the inner wall of the section settling tube 1, the measuring probe is installed on the guide wheel, the traction rope 2 is connected with the guide wheel, and the guide wheel and the guide groove are matched in structure, so that the measuring probe can run more smoothly and stably in the section settling tube 1.

In this embodiment, the hauling rope 2 is a steel rope. The section settling tube 1 is a U-shaped tube, and specifically, the section settling tube 1 includes a bent tube section 101 and two straight tube sections 102 connected to two ends of the bent tube section 101, the two straight tube sections 102 extend from the same side of the soil layer, and two ends of the hauling rope 2 extend from the ends of the two straight tube sections 102.

In this embodiment, the roadbed comprises three soil layers, which are a first powdery clay layer 3, a soil crushing layer 4 and a second powdery clay layer 5 sequentially arranged from bottom to top, and a section settling tube 1 is respectively arranged in the first powdery clay layer 3, the soil crushing layer 4 and the second powdery clay layer 5. A silt clay matrix layer 6 and a silt clay matrix layer 7 are sequentially arranged below the first powdery clay layer 3. The longitudinal section of the roadbed in the embodiment is trapezoidal.

The embodiment also provides a monitoring method based on the roadbed settlement multilayer monitoring structure 100, which comprises the following steps:

step one, embedding a section settling pipe 1 at the monitoring position of each soil layer in advance, and ensuring that the section settling pipes 1 are horizontally arranged to enable the plurality of section settling pipes 1 to be corresponding in position in the vertical direction;

step two, a traction rope 2 is inserted into each section settling tube 1, so that the traction rope 2 extends out of two ends of each section settling tube 1;

step three, mounting a measuring probe at one end of the traction rope 2, connecting the measuring probe with a data acquisition and processing device, and moving the measuring probe from one end of the section settling tube 1 to the other end by pulling the other end of the traction rope 2; specifically, the measuring probe is carried on the guide wheel, and the traction rope 2 pulls the guide wheel to move along the guide groove, so that the measuring probe is driven to move;

and step four, the measuring probe transmits the measured data to the data acquisition and processing device, and the settlement value of each node in each soil layer is obtained after processing.

In particular, the main element of the measurement probe is an accelerometer. After settlement occurs, the section settling tube 1 can generate the same deformation as the roadbed settlement. And (3) using a traction rope 2 to slowly pull the measuring probe from one end of the section settling tube 1 to the other end, wherein the component of the gravity vector of the accelerometer in the horizontal direction is the inclination angle of the measuring probe in the horizontal direction, recording the angle of each node, and the product of the angle and the length of the measuring probe is the settling value of the node.

Therefore, the section settlement monitoring device in the embodiment is suitable for section settlement monitoring, has high monitoring precision and can monitor the overall settlement rule of the section; meanwhile, as the section settlement monitoring device is arranged in each soil layer, the settlement of different soil layers can be measured, the layered settlement monitoring can be realized, and the total settlement of the same section can be monitored. Therefore, the roadbed settlement multilayer monitoring structure 100 in the embodiment can monitor the overall settlement rule of the whole section, can measure the settlement amount of different soil layers, meets the requirements of monitoring roadbed section settlement and layered settlement, is simple in operation, low in cost, free of influence on roadbed construction, free of influence on external environment and strong in practicability.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. The utility model provides a multilayer monitoring structure is subsided to road bed, a serial communication port, including road bed, data acquisition and processing device and a plurality of section settlement monitoring devices, the road bed includes a plurality of soil layers by supreme setting gradually down, section settlement monitoring devices includes section settling leg, measuring probe and haulage rope, each be provided with one in the soil layer the section settling leg is a plurality of the section settling leg is corresponding in the position on vertical direction, the haulage rope is used for driving measuring probe is in remove in the section settling leg, measuring probe with data acquisition and processing device connects.

2. The roadbed settlement multi-layer monitoring structure as claimed in claim 1, further comprising a guide wheel, wherein a guide groove matched with the guide wheel structure is arranged on the inner wall of the profile settlement pipe, the measuring probe is mounted on the guide wheel, and the traction rope is connected with the guide wheel.

3. The multi-layered roadbed settlement monitoring structure of claim 1, wherein the profile settlement pipe is a U-shaped pipe.

4. The subgrade settlement multi-layer monitoring structure according to claim 1, characterized in that the subgrade comprises three soil layers, wherein the three soil layers are a first powdery clay layer, a crushed soil layer and a second powdery clay layer which are sequentially arranged from bottom to top respectively.

5. The multi-layered roadbed settlement monitoring structure of claim 1, wherein the roadbed has a trapezoidal longitudinal section.

6. A monitoring method based on the roadbed settlement multi-layer monitoring structure as claimed in any one of the claims 1 to 5, characterized by comprising the following steps: