新加坡环线地铁工程的设计施工技术与坍塌应急处理方案讲座学习教案

1、会计学1新加坡环线地铁工程的设计施工技术与坍新加坡环线地铁工程的设计施工技术与坍塌应急处理塌应急处理(chl)方案讲座方案讲座第一页，共26页。Real-Time Monitoring Instruments:uInstrument can be automated by connecting to the data logger system and real time processing / visualization software. uThe time interval for data logging and retrieval will be set according to

2、construction requirements.第1页/共26页第二页，共26页。The monitoring results presented in the real time display and report includes:uRotational tilting of structuresuDifferential Settlement of structures第2页/共26页第三页，共26页。第3页/共26页第四页，共26页。House No. 81 & 83 Side ViewEL Beam SensorEL Tilt Sensor第4页/共26页第五页，共26

3、页。House No. 81 & 83 Front ViewEL Beam SensorEL Tilt Sensor第5页/共26页第六页，共26页。House No. 85 & 87 Front ViewEL Tilt Sensor第6页/共26页第七页，共26页。House No. 89 & 91 Front ViewEL Tilt Sensor第7页/共26页第八页，共26页。Serene House EyeshotEL Tilt Sensor第8页/共26页第九页，共26页。French Embassy EyeshotEL Tilt Sensor第9页/共26页

4、第十页，共26页。Cluny Court Eyeshot (Shop-Houses)EL Beam SensorEL Tilt Sensor第10页/共26页第十一页，共26页。EL Tilt SensorEL tiltmeters are used to monitor changes in the inclination of a structure. They provide an accurate history of movement and early warning of potential structural damage. The narrow-angle EL tiltm

5、eter (shown with cover removed) measures tilt over a range of +/- 40 arc minutes. It can detect changes as small as one arc second (0.00028 degree). It is supplied with a two-point mounting bracket for use with groutable anchors. 第11页/共26页第十二页，共26页。EL Beam SensorThe beam sensor consists of an electr

6、olytic tilt sensor attached to a rigid metal beam. The tilt sensor is a precision bubble-level that is sensed electrically as a resistance bridge. The bridge circuit outputs a voltage proportional to the tilt of the sensor. The beam, which is typically 1 to 3 meters long, is mounted on anchor bolts

7、that are set into the structure. Movement of the structure changes the tilt of the beam and the output of the sensorThe EL beam sensor can detect a change in tilt as small as one second of arc, equivalent to a movement of 0.005 mm per meter of beam. 第12页/共26页第十三页，共26页。Typical Installation of EL Tilt

8、 Sensor (1)Installing Anchors 1. Mark locations for anchor holes as shown below.2. Drill anchor holes in structure deep enough to embed about50mm of anchor. Remove debris.3. Attach mounting plate to anchors. This will keep the anchorsparallel while grout hardens.4. Mix epoxy grout as directed by man

9、ufacturer. Fill holes withgrout, then insert anchors with mounting plate attached.第13页/共26页第十四页，共26页。Typical Installation of EL Tilt Sensor (2)5. Use a level to check that the side and surface of the mounting plate are vertical, as shown below. Keep plate in correct position until grout hardens.第14页

10、/共26页第十五页，共26页。Typical Installation of EL Tilt Sensor (3)6. Screw tiltmeter to mounting plate.第15页/共26页第十六页，共26页。Typical Installation of EL Beam Sensor (1)1.Mark locations for anchor holes: Draw a horizontal line on the structure, then mark off gauge lengths for each sensor. Linked beams share ancho

11、rs.2.Drill anchor holes to depth of about 100 mm. Take care to drill holes at same angle.3. Remove debris from holes. Mix epoxy grout as directed by manufacturer. Fill hole with grout, then insert anchor.4. Allow grout to harden before mounting beam.5. Measure the center to center distance between e

12、ach pair of anchors.6. Check that anchors are parallel. Bend anchors into line, if necessary.7. Check that end brackets are inserted into beams, but not completely tight.第16页/共26页第十七页，共26页。Typical Installation of EL Beam Sensor (2)9. Fasten end bracket of beam sensor to angle brackets. Hardware is u

13、sually supplied with all washers in place. Use drawing below to see where end brackets and angle brackets fit. Tighten nuts so that spring washers are just slightly compressed.8. Fasten angle brackets to anchors, as shown in the drawing at right第17页/共26页第十八页，共26页。Instrumentation Database ServerS&

14、;F Web ServerReal Time Data VisualizationEL Beam SensorGSM ModemGSM ModemAlarm messages sent by emailsAlarm messages on mobile phone or pagersGW Web ClientsFirewallAlarm messages sent by emailsAlarm messages on mobile phone or pagersAllow Client to View / Download Data, Report and Method Statement AnytimeAuto Logging and Real Time Monitoring SystemAcquisition Logging SystemEL Beam SensorEL Beam SensorEL Tilt SensorEL Tilt SensorEL Tilt Sensor(Site Office / LTA)S&F Local Server第18页/共26页第十九页，共26页。Past Pro