| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for simply estimating cement amount of a not-yet consolidated sample with comparatively high precision by comparing reaction heat of cement. <P>SOLUTION: A plant 2 for producing cement milk with a designed composition is provided on the ground 1. Mud 5 is piled up at the bottom part of a pile hole 4 when the pile hole 4 is formed by digging the ground 1. Part of cement milk 3 in the plant 2 is sampled as an original solution sample 3a. The temperature of the original solution sample 3a and time past from the reference time t<SB POS="POST">0</SB>are measured, respectively, thereby producing a "time-temperature" graph. In addition, soil cement 6 is produced by injecting the cement milk in the plant into the bottom part of the pile hole 4. The soil cement 6 which is partially extracted to the ground as an unconsolidated sample 6a. The temperature of the unconsolidated sample 6a and the time past from the reference time t<SB POS="POST">0</SB>are measured, respectively, thereby producing another "time-temperature" graph. Cement amount of the unconsolidated sample 6a is estimated by comparing both the samples with respect to temperature, temperature change, rising tendency and the like. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
