Function gradient concrete composite well wall and manufacturing method

Abstract

The invention discloses a function gradient concrete composite well wall and manufacturing method and belongs to the technical field of vertical well construction. The function gradient concrete composite well wall is manufactured by adopting a prefabricating or cast-in-place manner. The function gradient concrete composite well wall comprises multiple layers of concrete well walls, wherein the concrete well walls are combined coaxially and closely, and elastic moduli of the concrete well walls are different. Damping material layers are arranged among the layers. All the well walls are arranged with different thicknesses. The concrete material performance is utilized fully, and the function gradient concrete composite well wall with the low requirement for concrete strength, small wall thickness and low project manufacture cost is manufactured. The elastic limit bearing capacity of a thick-wall cylinder is improved remarkably, and high-strength concrete does not need to be used. The well wall thickness is reduced, the material use amount is reduced, and the project manufacturing cost is reduced substantially.

Description

technical field [0001] The invention belongs to the technical field of shaft construction, and in particular relates to a functional gradient concrete composite shaft wall and a manufacturing method thereof. Background technique [0002] Shafts are commonly used in underground engineering, and are widely used in mineral mining, tunnel construction, water conservancy projects, etc. When radial pressure acts on the outer edge of a traditional single-layer homogeneous shaft, the stress distribution in the well wall will be uneven, and a large tangential stress concentration will occur near the inner edge. If the thickness or strength of the well wall is not enough, it will occur destroy. In order to improve the ultimate bearing capacity of the shaft wall structure, one method adopted at this stage is to increase the wall thickness. However, when the shaft wall thickness increases to a certain limit, the tangential stress near the inner edge is difficult to be greatly reduced. ...

AI Technical Summary

Problems solved by technology

When radial pressure acts on the outer edge of a traditional single-layer homogeneous shaft, the stress distribution in the well wall will be uneven, and a large tangential stress concentration will occur near the inner edge. If the thickness or strength of the well wall is not enough, it will occur destroy

In order to improve the ultimate bearing capacity of the shaft wall structure, one method adopted at this stage is to increase the wall thickness. However, when the shaft wall thickness increases to a certain limit, the tangential stress near the inner edge is difficult to be greatly reduced. That is, the ultimate bearing capacity of the borehole wall cannot be effectively improved

Another method is to increase the strength of concrete to increase the ultimate bearing capacity of the shaft wall, but this method does not fully utilize the properties of concrete materials

And these two kinds of methods have all increased the cost of shaft greatly, have increased the construction cost of project

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