Weight-type inclinometer

Abstract

A weight-type inclinometer relates to a measuring device for bore hole inclination, and especially a measuring device for bore hole inclination in high-pressure grouting cutoff wall construction. The invention comprises an inclinometer pedestal and a weight, and the key technology is that a wall-protecting sleeve is connected to the bottom end of the inclinometer pedestal; a balance supporter is mounted at the upper end of the inclinometer pedestal; a centering disc is mounted at the upper end of the balance supporter; a center hole is opened at the center of the centering disc; a measuring rope passes through the center hole; one end of the measuring rope is wound on a hoist, and the other end is attached to a top center of the weight; the weight is located in the inclinometer. The device of the invention has simple structure, low cost, strong operationality during construction, simple and rapid process for inclination measurement, and is applicable to large-scale utilization. The device is not influenced by groundwater in the hole, hole size, or hole depth, has an inclination measurement precision of up to thousandth, is applicable to inclination measurement for deep holes, provides reliable guarantee for hole inclination measurement of deep holes in high-pressure grouting construction, and is completely suitable for requirements of construction with super strength and high difficulty.

Description

Technical field: [0001] The utility model relates to a heavy hammer type inclinometer, which relates to a drilling hole inclination measuring instrument, in particular to a drilling hole inclination measuring instrument in the construction of high-spray cut-off walls. Background technique: [0002] In the construction of the high-spray cut-off wall, the control of the inclination of the high-spray drilled hole is the focus of restricting the construction quality. If it is not in place, it will lead to serious consequences such as slits between piles and failure to effectively overlap. Therefore, hole inclination control is one of the key points in the construction quality of high-spray cut-off walls. [0003] At present, there are mainly two methods for measuring the inclination of high-jet drilling, anti-magnetic interference inclinometer and floating inclinometer, but they all have the following disadvantages: [0004] 1. The anti-magnetic interference inclinometer has th...

AI Technical Summary

Problems solved by technology

For projects with large construction areas and tight construction schedules for high-spray cut-off walls, it is necessary to carry out inclinometer work on multiple construction surfaces at the same time. If the inclinometer is not added, it will directly affect the construction efficiency and progress. The purchase price is more than 150,000 yuan, and it needs to invest 900,000 to 1,200,000 yuan in purchase funds at a time. It also has high requirements on the working conditions, and it must be handled with care. The maintenance rate is high, so the anti-magnetic interference inclinometer is not conducive to the high-spraying construction of the cofferdam Medium and large area use

[0005] 2. Although the floating inclinometer has reliable data accuracy and can be used in a large area, it is only suitable for shallow hole depth and large-diameter drilling. Because the floating inclinometer adopts the "inverted method" principle, its orifice floats With the movement of the inclinometer weight, it forms an inverted triangle with the center of the orifice. According to the maximum deflection of 1%, and the inner diameter of the pipe protection wall casing is Ф128mm, it can only measure the area with a hole depth of less than 7m, and its use is limited.

Therefore, the floating inclinometer cannot adapt to the inclination measurement of large hole depth (such as the maximum hole depth is more than 50m) and small hole diameter (such as the inner diameter of the pipe protection wall casing is Ф128mm).

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