Abrupt slope bare rock drilling platform and technology in huge reservoir

Abstract

The invention relates to bridge engineering, in particular to an abrupt slope bare rock drilling platform and a technology in a huge reservoir and used for bridge construction. The invention is characterized in that an abrupt slope bare rock drilling device in a huge reservoir comprises steel pipe piles, a cross beam, a longitudinal beam, cross struts and a steel casing, wherein the steel pipe piles are arranged on the riverbed in a longitudinal and transverse spacing manner; the longitudinal and transverse spaces of the steel pipe piles are connected through a braced plane frame, the longitudinal cross strut and the transverse cross strut; the space surrounded by the four steel pipe piles is internally provided with the steel casing the height direction of which is parallel to the steel pipe piles; and the diameter of the pile foundation steel casing is 280cm, and the steel casing is made by rolling an A3 steel plate with the thickness of 14mm. The construction technology of the platform has 14 steps, and the invention provides the abrupt slope bare rock drilling platform and the technology in the huge reservoir, which can ensure the platform safety, easily heighten or lower the steel pipe piles, ensure the accurate in-position of a drilling machine and the pile foundation verticality, and is convenient to controlling the axial plane position of the pile foundation.

Description

technical field [0001] The invention relates to bridge engineering, in particular to a steep-slope bare-rock drilling platform and technology used in bridge construction in deep reservoir areas. Background technique [0002] At present, bored piles have formed a very mature construction technology, but for deep water level, exposed riverbed bedrock, no covering layer on the surface, rock surface inclination, and large fluctuations, a single steel pipe pile or steel casing cannot Self-stabilization, the construction of the drilling platform is carried out by conventional methods, and the existing methods and devices have great difficulties in construction. For this reason, someone proposed a method of using a multi-barge barge as the drilling rig platform, which is connected by channel steel and section steel to form a catamaran to form a floating working platform. That is to first sink the steel cofferdam to the bottom of the river bed, pour the bottom sealing concrete, con...

AI Technical Summary

Problems solved by technology

[0003] Although the first technology has the characteristics of simple manufacture and convenient movement, it is a simple and economical platform for deep-water drilling operations, but the impact of the water level on the catamaran floating platform is likely to cause one side of the floating platform to run aground. Due to the instability of the platform, drilling and punching will easily cause pile displacement or slurry leakage, and at the same time, the vibration generated by the impact will easily cause damage to the hull, which increases the difficulty and danger of engineering construction

As for the second technology, although it is very safe and the stability and safety of the platform have been better solved, the steel investment is huge, and because the water level in the reservoir area changes greatly, the steel cofferdam may have to be raised or raised repeatedly. Reduced, unbearable construction costs

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