Rock-socketed pipe pile foundation with pile core by concrete pouring and pile side by static pressure grouting and construction method for rock-socketed pipe pile foundation

Abstract

The invention discloses a rock-socketed pipe pile foundation with a pile core by concrete pouring and a pile side by static pressure grouting and a construction method for the rock-socketed pipe pile foundation. The pipe pile foundation comprises a prestressed concrete pipe pile, a pile shoe, concrete for pouring the pile core and cement mortar formed during static pressure grouting of the pipe side, and the pile shoe is connected with a lower end of a section of a pipe pile at the downmost of the pipe pile foundation. Before pouring the concrete for pouring the pile core, clean water is jetted by high-pressure jet grouting equipment to clean an inner wall of the pipe pile and rock-soil dregs retained in the pile core to be pumped out by a mortar pump. The cement mortar formed during static pressure grouting of the pipe side is formed by using a drilling machine to drill a plurality of holes close to the periphery of the pipe pile to a pile bottom and respectively statically pouring cement paste when the pipe pile is constructed to a designed elevation and the pile core is poured with underwater concrete for a certain time. The rock-socketed pipe pile foundation with the pile core by concrete pouring and the pile side by static pressure grouting and the construction method for the rock-socketed pipe pile foundation are especially suitable for rock-socketed pipe pile foundations, can increase force bearing area of a section of the pipe pile, and improve pipe pile strength and bearing capability of the pipe pile foundation, and the construction method is simple and reliable.

Description

Technical field [0001] The invention relates to a pipe pile construction method in the field of pile foundations, belonging to the technical field of transportation and civil construction engineering, in particular to a rock-socketed pipe pile foundation with static pressure grouting on the side of a pile core pouring concrete pile and a construction method thereof. Background technique [0002] The pipe-while-drilling pile (CN2007100290235) is a new type of pile, which has strong adaptability to geological conditions, fast construction speed, reliable quality, low material consumption, high bearing capacity of the pile, mechanized operation, no construction mud discharge problem, and protects the environment . One of the advantages of this type of pile is that it can be embedded in the base rock to give full play to the resistance of the pile tip. However, for large-diameter rock-socketed pipe pile foundations, due to the limited wall thickness of the pipe pile, the pile body st...

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Problems solved by technology

[0005] However, there is still a need for further improvement of the prior art pipe pile foundation while drilling and its construction technology.

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