22 first-class cost engineer civil engineering measurement test point foundation pit inspection slot, cost engineer academic master notes, long press and like + forward + evaluation continue to be updated, click on my avatar on the Wendang version and send a private message to me: 2022
eliminate the observation foundation pit In addition to whether the position, section size, elevation and slope of the (trough) meet the design requirements, the soil quality at the bottom of the entire pit (trough) should also be comprehensively observed:
1) Is the soil quality the same and the color;
2) Is the hardness of the soil uniform? Consistent, whether there is any locally too soft or hard;
3) Is the water content of the soil abnormal, whether it is too dry or too wet;
4) Whether there is any vibration or hole sound when walking at the bottom of the pit (trough) or tamping .
The focus of observation should be on the column base, corners of the wall, under the load-bearing wall or other parts with greater stress. If there are abnormal parts, they should be handled in conjunction with relevant units such as survey and design.
2. Light-duty power touch detection
has dual functions of exploration and testing.
When using light power contact probe for foundation pit (trough) inspection, check:
1) the strength and uniformity of the foundation-holding soil layer;
2) whether there is a weak sub-lying layer buried in shallow parts;
3) whether there is a shallow part; Bury pits, ancient tombs, ancient wells, etc. that are difficult to discover directly.
When the number of hammers penetrated by 30cm is greater than 100 hits or the number of hammers penetrated by 15cm is greater than 50 hits, the test can be stopped.
