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;1 <br /> k <br /> pushed into the <br /> The above m6asurements are made ccntinuously,while th:'.ProTMQ pushi g is interrupted <br /> ,oil at a constant penetration rate of 2 cmisso (f Pi e`�to be attached to the tap of the <br /> h at 1-m (3.3-ft) intervals to enable now <br /> sections of R p <br /> string. <br /> As shown in Figure 2, two built-in load cells with bonded strain gauges are used to - <br /> - d friction sleeve resistances. A steady excitation voltage is <br /> measure the cone tip an <br /> supplied to the strain gauges by means of an electric cab's is stn+ng through the <br /> which <br /> si nal m millivotts), according to the <br /> push pipes. The strain gauges return an o��ut si nal is amp'i1iad and converted to <br /> magnitude of the load cel' deformation. rite output S <br /> digital data in units of force (tons). <br /> investigation, electric friction cones with 15-ton capa.cfty load cells were <br /> For thise". in which the bottom load <br /> - used. The load cell configuration is the "subtraction tip`ad cell measures the combined tip and <br /> tali measures the cone tip resistance a <br /> sleeve resistances. Both Toad tolls are loaded in compression.ne t from the top load cell <br /> e net sleeve resistance <br /> value is obtained by subtracting the bottom load cell m <br /> mcasurem <br /> art, this subtraction is performed automatically by tine computerized data <br /> acquisitlon system. <br /> The <br /> inclination of the probe was measured with a built-in tilt sensor to monitor the <br /> varticality of the penetration. <br /> water ressure meas��rement is made by means of a filter and pressure transducer <br /> The pore p <br /> - assembly which is al,-.j built into the probe. <br /> 2.1.2 plezornetric GPT Measurements <br /> re pore water pressure, which enables <br /> The piezometric CPT option can be used to measu <br /> evaluation of groundwater conditions as well as deriving additional stratigraphic <br /> evalu .. <br /> information. <br /> e iezocone (or 4-channel cone), which is an <br /> Piezometric CPT testing is performed using "+p <br /> cone a <br /> quipped with a filter and fluid pressure transducer, such � above <br /> electric friction g <br /> in Figure 2. The maximum capacity of tho trans <br /> is 517 psig (36 to, <br /> �3 <br /> f <br /> eA <br /> 1Q9ffifi7SmQ>a' iFli/ffi _i <br />