Pore-forming construction method for old bridge pile site in-situ percussion drill matched with rotary drilling rig

Abstract

The invention discloses a pore-forming construction method for an old bridge pile site in-situ percussion drill matched with a rotary drilling rig. The construction method comprises the following steps: step 1, leveling a site; step 2, setting out a pile position; step 3, burying a pile casing; Step 4, percussion drilling in place; step 5, centering inspection; step 6, slurry preparation and circulation; and step 7, percussion drilling; Step 8, lifting the percussion drill; and step 9, secondarily re-measuring the pile casing. The percussion drill is matched with the rotary drilling rig for drilling construction, the advantages of combination of the two devices are exerted, when a newly-built bridge pile foundation coincides with or conflicts with an old bridge pile foundation, the percussion drill is used for constructing the old pile foundation part, the rotary drilling rig is used for rapidly forming holes below the old pile foundation, the construction sequence is clear, and construction is safe and reliable; The unit price cost of percussion drill construction is much higher than that of rotary drilling rig construction, part of drilling construction cost is saved on the premise that the rotary drilling rig is adopted for hole forming of the part below the old pile foundation, the equipment cost is obviously saved, and the construction efficiency is high.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a construction method of percussion drilling at the original site of old bridge piles combined with rotary drilling to form holes. Background technique [0002] With economic development and social progress, my country is vigorously promoting the construction of urban road networks, and the standards and grades of urban roads are constantly improving. Many bridges need to be demolished and rebuilt for new ones due to the long construction time or the inability to meet the current traffic requirements. With the increase of load, span and bridge width, the diameter and pile length of the new bridge pile foundation are generally larger than those of the old bridge pile foundation. This also brings certain difficulties to the construction of the pile foundation of the new bridge. The pile foundation of the new bridge overlaps or conflicts with the pile foundation of the old bridge...

AI Technical Summary

Problems solved by technology

[0002] With economic development and social progress, my country is vigorously promoting the construction of urban road networks, and the standards and grades of urban roads are constantly improving. Many bridges need to be demolished and rebuilt for new ones due to the long construction time or the inability to meet the current traffic requirements. With the increase of load, span and bridge width, the diameter and pile length of the new bridge pile foundation are generally larger than those of the old bridge pile foundation. This also brings certain difficulties to th