Full-rotating drill and hydraulic vibration hammer synergetic shaft sinking method

Abstract

The invention relates to the technical field of building foundation engineering construction, in particular to a full-rotating drill and hydraulic vibration hammer synergetic shaft sinking method. Thefull-rotating drill and hydraulic vibration hammer synergetic shaft sinking method comprises the following steps: 1, pile position setting out is conducted; 2, a orifice casing is inserted and struck; 3, a casing bottom pipe and a steel casing are mounted; 4, a full-rotating drill is mounted; 5, a hydraulic vibration hammer is mounted; 6, test-run of a machine is conducted; 7, a mortar conveyingpipe 90 is mounted, and the casing bottom pipe continues being drilled; and 8, concrete is poured, specifically, when drilling is conducted to a preset depth, hole cleaning and acceptance check are conducted, then a reinforcement cage is lowered in to a hole, then the concrete is poured, and the steel casing is pulled out from the hole, and a pile is formed. According to the full-rotating drill and hydraulic vibration hammer synergetic shaft sinking method, drilling into a very complex formation can be conducted, the drilling speed can be increased by four times or above, during hole drilling,because of advanced support of the steel casing, the situation of landslide of a hole wall or orificeis avoided, thus the pouring amount of the concrete can be decreased to the minimum, that is, thefilling coefficient is the minimum, and thus the material cost is saved.

Description

technical field [0001] The invention relates to the technical field of building foundation engineering construction, in particular to a method for synergistically drilling a well with a full-rotary drilling rig and a hydraulic vibratory hammer. Background technique [0002] Bored cast-in-situ pile refers to the pile hole formed in the foundation soil by means of mechanical drilling, steel pipe extrusion or manual excavation on the project site, and a steel cage is placed in it and concrete is poured into it. [0003] At present, when drilling complex strata, such as strata containing miscellaneous fills, sandy pebbles, boulders and boulders, the common method is to use a steel casing and a pipe twister to cooperate, and the rotary excavator will first drill the hole. Excavate the slag, and then the pipe rubbing machine drives the steel casing to follow up at any time to prevent the hole wall or hole from collapsing during the drilling process. [0004] However, if the pile ...

AI Technical Summary

Problems solved by technology

[0004] However, if the pile length is too long (such as exceeding 40 meters), the depth of the borehole will also increase accordingly, so that the side friction resistance between the steel casing and the hole wall will be too large when the steel casing is drilled downward. , so that the pipe rubbing machine does not rub, it is easy to get stuck and the steel casing cannot be pulled out from the hole, and the accumulation of muck in the hole is easy to block the drilling of the steel casing. Therefore, the existing drilling efficiency is low

Images