Magnet ring type settlement layered horizontal test system

Abstract

The invention relates to a magnet ring type settlement layered horizontal test system, which comprises an L-shaped settlement pipe consisting of a vertical part arranged in the vertical direction, a horizontal part arranged in the horizontal direction and a bend connecting the vertical part and the horizontal part, a plurality of settlement magnet rings arranged on the outer circumference of the vertical part of the settlement pipe at intervals and internally provided with permanent magnets, a tester, a test head and a cable connected between the test head and the tester and having the function of a calibrated scale, wherein a pipe mouth of the horizontal part in the settlement pipe is positioned in a protection pool under ground and outside a slope toe on one side of a roadbed. The settlement pipe of the magnet ring type settlement layered horizontal test system is arranged outside the roadbed, so the magnet ring type settlement layered horizontal test system is not influenced by the roadbed filling construction, and the problems of damage and deflection of the settlement pipe do not appear, the settlement does not lose, and the construction progress and quality are not influenced; in addition, the measurement is carried out outside the roadbed, and the height of the pipe mouth does not need to be measured; therefore, the reading position is fixed, and the measuring accuracy is high.

Description

Technical field [0001] The invention relates to a foundation settlement observation system, in particular to a horizontal magnetic ring type layered settlement tester. Background technique [0002] At present, in geotechnical engineering, especially roadbed engineering, the settlement control of soft soil foundation has become an increasingly important issue, especially in the context of the construction of a large number of railway passenger dedicated lines, ballastless high-speed railways and other projects in my country. Subgrade settlement control has become the top priority in the research of subgrade disciplines. One way to study the settlement of the road foundation is to bury a monitoring device for the settlement of the foundation in situ and use the test device to observe it. figure 1 It is a schematic diagram of the structure and use state of the magnetic ring type layered settlement test system in the prior art. Such as figure 1 As shown, this prior art magnetic rin...

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Problems solved by technology

But, there is following problem in this magnetic ring type layered settlement test system of prior art: the first, in roadbed engineering, along with the high filling of roadbed 5 settlement pipe 1 needs to be lengthened joint by joint, but due to the present roadbed 5 Filling is usually carried out in a mechanized way, so it often causes damage to the settlement pipe 1, and it needs to be repaired in time, which will affect the construction progress and quality, and lead to increased construction costs

Second, the damaged settling tube 1 cannot be fully repaired in time, which will cause the loss of settlement

Third, the settlement tube 1 is often deflected during the rolling process of the subgrade 5, resulting in a decrease in measurement accuracy

Fourth, the mouth of the settling tube 1 is usually sawn off manually, so it is difficult to ensure that the sawing plane is smooth and the sawing plane is perpendicular to the axis of the settling tube 1, which will cause the settlement measuring ruler to be stuck on the position and level The measuring position of the ruler is inconsistent, resulting in human error, so it is difficult to meet the subgrade settlement test requirements of passenger dedicated lines and high-speed railways

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