1. PreambleIn the construction of bridges in hard geological areas, the commonly used pile foundation construction methods are hand-dug pile method and percussion drilling method. Manual drilling method is gradually eliminated due to the long pile construction period, backward technology, and the ne Read More

Due to the complexity of construction technology, the final pile quality may be affected by various visible or invisible factors. In order to ensure the quality of the whole pile foundation engineering meets the design requirements, it is very important to prevent and deal with the common quality pr Read More

Rotary digging is the most widely used construction method of bored pile. Rotary drilling rig uses telescopic drill pipe to drive rotary short auger bit, drill bucket or other operating devices to make holes, just like chefs to use different knives to deal with different ingredients, rotary diggin Read More