Construction method and equipment for reverse circulation drill to drill hole, hammer to form hole, expand hole and remove slag

Abstract

The invention discloses a construction method and construction equipment for a reverse circulation drill to drill a hole, hammer to form the hole, expand the hole and remove slag. A power head drives a drill rod to drill the hole; an impact hammer provided with a reaming device hammers to form the hole, and the hole is expanded by a reaming hammer; the drill rod of the drill is connected with a guiding slag removing pipe of an impact reaming hammer; and sediments at the bottom of the hole are sucked out by a drilling mud pump, and then discharged into a movable sediment separation pool by thedrill rod and riprapped at the pile bottom to form a cushion layer. The invention has the advantages that: the reverse circulation drill is combined with the impact hammer, so the reverse circulationdrill has high drilling speed and strong rock embedding capability; the reverse circulation drill is combined with the guiding slag removing pipe of the reaming hammer so as to hammer while removing the slag, and the slag can be removed finally; the impact hammer is combined with the reaming hammer to form an expanded head, a ratio of the diameter of the expanded bottom end surface to the sectionof the pipe body is increased, so the bearing capability of the single pipe is effectively improved; and the reverse circulation drill is combined with impact reaming hammer so as to drill, ream, remove slag and riprap, and the functions are shared; the movable sediment separation pool can separate the sludge cakes and sediments and transport the sludge cakes and sediments out of the field, so the mud is prevented from polluting the environment.

Description

technical field [0001] The invention relates to a construction method and equipment for drilling, hammering, reaming and slag removal with a reverse circulation drilling rig, and belongs to the technical field of building construction. Background technique [0002] With the development of the national economy, all kinds of civil and industrial buildings are becoming more and more high-rise. Cast-in-place piles have been recognized by many design units and construction units for their unique advantages of large bearing capacity. An affordable form of foundation indeed. [0003] Affected by factors such as building structure type, load distribution, geological conditions, construction equipment and construction conditions, the choice of pile type is greatly restricted, especially in the case of high groundwater levels such as silt or muddy soil or quicksand layers. In the case of unfavorable geological conditions, according to the current dry and wet method of various soil-sq...

AI Technical Summary

Problems solved by technology

However, its disadvantages are that the bearing capacity of the squeezed soil pile is low, the pile end cannot be driven into the hard soil layer and rock layer, the hammering noise is large when driving, and the ground around the pile is easy to bulge, causing the adjacent piles in place to float up, and the welding quality of the pile connection Difficult to control, poor anti-seismic, anti-pull, anti-corrosion, prone to broken piles, not suitable for high-rise buildings, especially buildings with a building life of more than 50 years and earthquake resistance of more than 7 grades, only suitable for low-level general construction projects; The advantage of the hole-digging pile is that it has a high bearing capacity, and its pull-out resistance, shear resistance and corrosion resistance are better. The advantage of cast-in-place piles is that they have high bearing capacity, and their pull-out resistance, shear resistance and corrosion resistance are superior to other pile types. They are widely used in the foundations of high-rise civil buildings, bridges, roads, water conservancy and other buildings, but their disadvantage is that the construction speed is slow. , the pile tip sediment is not easy to remove, the pile tip resistance is reduced, which affects the bearing capacity of a single pile, and the construction cost increases, which restricts the application and development of bored piles

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