Track steel-pipe pile capable of reducing negative friction force and construction method

A technology of negative friction resistance and steel pipe piles, which is applied in the field of building foundation engineering, can solve the problems of weakened pile bearing capacity, reduced pile body bearing capacity, and harmful chemical components, so as to increase positive friction resistance and reduce negative friction The effect of resistance

CN106836260AActive Publication Date: 2017-06-13LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-06-13

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Abstract

The invention discloses a track steel-pipe pile capable of reducing negative friction force and a construction method, and belongs to the technical field of building foundation engineering. The track steel-pipe pile comprises a pile body, gear shafts, T-shaped steel beams and a rigid track. Concrete is poured into a round steel pipe to form the pile body. The middle of each gear shaft is provided with a one-way rotating gear, and the two ends of each gear shaft are provided with one-way rotating pulleys. Webs of the T-shaped steel beams are annularly welded to the outer side of the pile body at equal intervals. The gear shafts are symmetrically welded to the two sides of the webs of the T-shaped steel beams and are arranged at equal intervals in the longitudinal direction of the webs. The rigid track is composed of track shoes and track pins. The two ends of each track shoe are provided with holes, and the track shoes are connected through the corresponding track pins to form the rigid track. The rigid track is engaged with the one-way rotating gears on the gear shafts and further attached to the one-way rotating pulleys at the two ends of the gear shafts, and the rigid track can be closed through the track pins so that the track steel-pipe pile can be formed. According to the track steel-pipe pile capable of reducing negative friction force and the construction method, through one-way rotation of the rigid track, pile-soil positive friction force can be increased while the pile-soil negative friction force is reduced, insufficient bearing capacity of the pile body is prevented, and safety and stability of an upper structure are guaranteed.
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Description

technical field

[0001] The invention relates to building foundation engineering technology, in particular to crawler steel pipe pile technology for reducing negative frictional resistance. Background technique

[0002] In recent years, the national economy has continued to develop rapidly, the speed of urbanization has accelerated, and the number of urban populations has continued to increase. The existing infrastructure can no longer meet people's production and living needs. A major challenge faced by large and medium-sized cities, a large number of high-rise and super high-rise buildings have emerged in large and medium-sized cities. As a form of foundation for high-rise and super high-rise buildings, pile foundation is accepted by the engineering community because of its high bearing capacity and can effectively reduce the uneven settlement of superstructures, and is widely used in engineering practice. However, in the actual application of the pile foundation in the co...

Examples

Embodiment Construction

[0016] Working principle of the present invention: (1) Negative frictional resistance rotation principle: In collapsible loess and soft soil areas, soil settlement will generate downward sliding friction on the pile body, driving the steel track and one-way rotating gear to rotate When the gear shaft rotates, the sliding friction force generated by the soil settlement on the pile body is converted into the power to make the crawler belt and the one-way rotating gear rotate around the gear shaft, so as to reduce or even eliminate the negative friction resistance between the pile and soil. (2) Locking principle of positive friction resistance: when bearing the load of the upper structure, the settlement of the pile body will drive the outer steel crawler to move upward. At this time, the gear is in a non-rotating state, and the friction generated between the soil and the steel crawler It is transmitted to the pile body through the T-shaped steel beam, so that there is positive fr...