High Slope Monitoring
1 Monitoring content
The main monitoring contents are as follows:
Ø monitoring, mainly monitoring of temperature, humidity and rainfall;
Ø Deformation observation of slope, including settlement of key points of slope, uneven settlement, deep deformation of soil mass, etc.;
Ø Force monitoring of the retaining wall, including the strain of the retaining wall, the force of the anchor of the retaining wall, etc.;
Ø The deformation of the retaining wall is mainly the monitoring of the inclination of the retaining wall;
Ø Earth pressure and pore water pressure monitoring;
Ø Water level monitoring.
2 Monitoring programs
According to the monitoring objects and monitoring content, the specific monitoring plan for side slope monitoring is implemented in the following table (the monitoring during the construction period and the operation period are different):
|
Monitoring content |
Monitoring parameters |
Monitoring method |
part |
|
Environmental monitoring |
Temperature (ambient temperature) |
Temperature Sensor |
near the structure |
|
Rainfall monitoring |
rain gauge |
open side slope |
|
|
Deformation Monitoring |
surface displacement |
GPS/ Beidou receiver |
Key Slope Locations |
|
relative surface deformation |
Pull Wire Displacement Sensor |
Slope Surface |
|
|
deep soil displacement |
Guide Wheel Fixed Inclinometer |
Inclinometers at key locations |
|
|
Deformation of retaining wall |
Inclinometer or crack meter, etc. |
Sloped or cracked areas |
|
|
Stress / strain and force monitoring |
Retaining Wall Concrete Surface Strain |
Surface strain gauge |
Important parts of retaining wall |
|
Retaining wall reinforcement |
Buried strain gauge |
Reinforcing cage main bar |
|
|
Support pressure |
earth pressure box |
retaining wall |
|
|
Pore water pressure |
Pore pressure gauge |
Key Slope Locations |
|
|
Anchor pullout resistance / anchor rod axial force |
rebar meter, anchor cable meter |
Anchor end |
3 system advantages
Ø 24 -hour real-time monitoring: fully automatic online monitoring of slope deformation and force, slope slope and sliding, environment, etc., to grasp the safety status of the overall construction / operation of the slope in real time.
Ø -level early warning: When the data is abnormal, the system will trigger the corresponding three-level alarm mechanism, and notify users in the form of SMS, fax, broadcast, etc. at the first time.
Ø Emergency plan handling: directly extract the corresponding handling methods from the expert database, and take measures such as personnel intervention and road blockade in a timely manner to eliminate potential safety hazards in the bud.
Ø Research on structural damage mechanism: macroscopic analysis of structural damage mechanism, structural deformation and damage trend research, induction and deduction.
Ø reference basis: The storage of monitoring data provides an analogy basis for the design and construction of similar projects in the future.
Ø Formation of industry norms and standards: formulate a safety evaluation standard system suitable for structural health monitoring, and form industry standards and norms.
4 Monitoring basis
The main basis for the online health monitoring system project of this slope is as follows:
1) Ministry of Communications "Technical Standards for Highway Engineering" JTG B01 - 2003
2) Ministry of Communications "Highway Engineering Quality Inspection and Evaluation Standards" JTG F80/1 - 2012
3) Ministry of Communications "Code for Design of Highway Subgrade" JTGD30 - 2004
4) Ministry of Communications "Regulations for Field Test of Highway Subgrade and Pavement" JTG E60-2008
5) "Global Positioning System (GPS) Measurement Specification" GB-T2009
6) "Automatic Control System Design Standards", National Bureau of Standards, 1999
7) "Road Database Cataloging and Coding Rules" JT/T 132-2003
8) "Code for Acceptance of Integrated Cabling System Engineering" GB 50312-2007
9) "Guidelines for Lightning Protection of Electronic Equipment" GB/T7450-1987
10) "Computer Site Safety Requirements" GB/T9361-2011
11) "Computer Software Reliability and Maintainability Management" GB/T14394 - 2008