A rock-socketed construction technique for large-caliber pile foundations

Abstract

The invention relates to a rock-socketing construction technology for large-diameter pile foundations. A combined drilling tool of a small-diameter drilling rig and a rotary drilling rig is used for the rock-socketing construction of large-diameter pile foundations. The role of the internal structure of the rock at the bottom. The rotary drilling rig is equipped with a rotary drill bit and a double-layer barrel drill. The rotary drill bit has the function of cutting rock, and the double-layer barrel drill can carry slag in the hole; the large-diameter pile foundation rock-socketing construction technology It specifically includes the following steps: S1, leveling the site, measuring and setting out; S2, introducing holes with a small-caliber drilling rig: using a small-caliber drilling rig to repeatedly introduce holes, and forming honeycomb holes in the rock at the bottom of the pile foundation; S3, forming holes with a rotary drilling rig: pile After the base part is punched into a honeycomb hole, replace the rotary drilling rig to drill the slag; S4: After the drilling is completed, form the pile hole, hoist the fabricated reinforcement cage in the pile hole, and install the conduit inside the reinforcement cage; S5: After the reinforcement cage and the conduit are installed, pour the cast-in-place pile with the conduit to complete the rock-socketing operation of the pile foundation.

Description

technical field [0001] The invention relates to a large-diameter pile foundation rock-socketing construction technology, which belongs to the field of building construction. Background technique [0002] The rotary drilling bored piles in our country began in the early 1960s and were first used in the construction of bridges and ports. In the mid-1970s, the rotary drilling bored piles began to be used in high-rise and important buildings in some large cities in China. In the 1980s In the later period, the rotary drilling bored pile developed rapidly and was widely used in various engineering constructions. With social development and engineering needs, large-diameter rotary drilling bored piles have also emerged as the times require. [0003] The relevant technology of rotary drilling bored piles at home and abroad has been quite mature, but in hard ground such as rock or extremely hard rock, the construction technology of large-diameter piles with rock-socketed type is sti...

AI Technical Summary

Problems solved by technology

However, in this patent, only high-power rotary drilling equipment is used for operation. However, high-power rotary drilling rigs are expensive to purchase and use, and the transportation exceeds the limit, especially for rock-socketed pile foundations with a diameter exceeding 1.5 meters. Simply using high-power rotary excavation equipment cannot fully meet the construction needs, and cannot achieve a large rock-socketed depth of the pile foundation

Images