Automatic Monitoring of Grouting Performance Parameters

Grout pressure and injected grout volumes are the two critical performance parameters that are commonly considered to evaluate the success of grouting operations. These two parameters have traditionally been measured using direct read devices such as Bourdon gages and flow meters. Direct read devices are however subject to errors and omissions from the operator, do not provide context, and do not provide a record of the grouting process for project documentation. For this reason, attempts at automatic recording of grout pressures and injected grout volumes started as early as in the ‘80s but the recording systems available at that time were bulky, costly, and usually required proprietary software. Nowadays, instruments and components are available that allow us to build light, portable and reliable grout monitoring systems that can be deployed easily by simple connection to the grout injection circuit. Further, the data can be processed in standard programs such as Microsoft Excel. FIG. 1. Compaction grout monitor with ultrasonic Doppler flow meter 42 2A _5 08 36 _A S C E _V ol _0 2_ R es iz e_ A A .jo b_ P ro ce ss C ya n_ 07 /3 1/ 20 12 _0 7: 54 :3 4 42 2A _5 08 36 _A S C E _V ol _0 2_ R es iz e_ A A .jo b_ P ro ce ss M ag en ta _0 7/ 31 /2 01 2_ 07 :5 4: 34 42 2A _5 08 36 _A S C E _V ol _0 2_ R es iz e_ A A .jo b_ P ro ce ss Y el lo w _0 7/ 31 /2 01 2_ 07 :5 4: 34 42 2A _5 08 36 _A S C E _V ol _0 2_ R es iz e_ A A .jo b_ P ro ce ss B la ck _0 7/ 31 /2 01 2_ 07 :5 4: 34