Sealing protection device and method for vacuum negative pressure static test pile

Abstract

The invention provides a sealing protection device and method for a vacuum negative pressure static test pile. The device comprises a soft sealing layer, a rigid platform and skirt edge, a main beam, a strip-shaped concrete buttress, a steel base plate, a hydraulic jack, a pressure bearing plate, a rigid bottom plate, a detachable circular ring, a spiral anchor pile, a static load instrument, an air pressure monitor and a vacuum air pump; a circular hole is reserved in the center of the rigid bottom plate, and the upper portion of the test pile is sleeved with the rigid bottom plate; the detachable circular ring is assembled at the circular hole; a bolt connecting hole is reserved in the outer edge of the rigid bottom plate; the rigid bottom plate is fixed to the surface of a foundation through the spiral anchor pile; the main beam is placed on the strip-shaped concrete buttress; the rigid platform and skirt edge is placed on the main beam and connected with the rigid bottom plate; and the soft sealing layer covers the outer layer of the rigid platform and skirt edge, and a closed space is formed. The device is adopted for detecting the bearing capacity of the pile foundation, external load increasing is not needed any more, a large amount of external load purchasing, transporting, hoisting and labor cost is saved, repeated usage can be achieved, and engineering economy is further saved.

Description

technical field [0001] The invention belongs to the technical field of pile foundation engineering detection, in particular to a sealing protection device and method for vacuum negative pressure static test piles, and is suitable for detection of pile foundation bearing capacity and protection of soil around piles. Background technique [0002] With the expansion of the construction scale of civil engineering, water conservancy, transportation, railway, municipal and marine projects, the requirements for the bearing capacity of the foundation are getting higher and higher, making the pile foundation the most widely used foundation form. It is used in the construction of medium-sized projects. It is one of the basic conditions to ensure the safety of buildings that the bearing capacity of piles meets the design requirements. However, in the construction process of various pile types, due to various reasons, the bearing capacity of the pile often fails to meet the design requ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a sealing protection device and method for vacuum negative pressure static test piles in view of the above-mentioned deficiencies in the existing static load test technology. The detection of foundation bearing capacity no longer requires external heavy loads, saving a large amount of external load purchase, transportation, hoisting and labor costs, and can be reused to further save engineering economy

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