A sealing protection device and method for vacuum negative pressure static test pile

Abstract

A sealing protection device and method for vacuum negative pressure static test piles. Bottom plate, detachable ring, screw anchor pile, static load meter, air pressure monitor and vacuum pump, a round hole is reserved in the center of the rigid bottom plate and set on the upper part of the test pile, and the detachable ring is assembled at the round hole. Bolt connection holes are reserved on the outer edge of the rigid base plate, and the rigid base plate is fixed on the foundation surface through screw anchor piles; the main beam is placed on the strip concrete pier; the rigid platform and skirt are placed on the main beam and connected with the rigid base plate; The soft sealing layer covers the outer layer of the rigid platform and the skirt to form a closed space. Using the device of the invention to detect the bearing capacity of pile foundations does not require external heavy loads, saves a large number of external load purchases, transportation, hoisting and labor costs, can be reused, and further saves engineering economy.

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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