A method and device for measuring the density of a composite grouted rockfill dam based on additional mass

A technology of density measurement and additional mass, which is applied in the field of engineering geophysical exploration, can solve the problems of not showing the linear relationship of rockfill bodies, limiting the application range of the additional mass method, and large variation range
CN108844853BActive Publication Date: 2020-11-27CHANGJIANG GEOPHYSICAL EXPLORATION & TESTING WUHAN CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGJIANG GEOPHYSICAL EXPLORATION & TESTING WUHAN CO LTD
Publication Date
2020-11-27

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Abstract

The invention provides an additional mass based determination method and device for density of a composite grout rock-fill dam. The method includes the following steps: placing a backing plate on a composite grout rockfill material, after three days of coagulation of the to-be-determined composite grout rockfill material, and stacking a plurality of mass blocks on the backing plate; taking a massblock of an uppermost layer as a detection point, collecting natural vibration frequency, removing the mass block of the uppermost layer, taking a mass block of a sub-upper layer as the detection point, repeating the collection process until all the mass blocks are removed, and obtaining the measured natural vibration frequency on each of the mass blocks; and obtaining the density of the compositegrout rockfill material based on the measured natural vibration frequency on each of the mass blocks. Therefore, abnormal signals, caused by excessive surface strength of the composite grout rock-fill dam, are avoided; and test errors, caused by changes of mechanical parameters of a rockfill in a coagulation process of the composite grout rockfill material, are avoided.
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Description

technical field

[0001] The invention relates to the technical field of engineering geophysical prospecting, and more specifically, to a method and device for measuring the density of a composite slurry rockfill dam based on additional mass. Background technique

[0002] Composite slurry rockfill material is a new type of dam building material. Specifically, the mixed slurry of cement, fine sand, additives, water and other materials is injected into the foundation dam body. Based on its easy flow and late hardening characteristics, it can fill part of the pores of the rockfill body to change the mechanical properties of the foundation dam body. , reduce the porosity of the rockfill body, and increase the compactness of the rockfill body. The compactness of the composite grout rockfill material after rolling in the early stage and grouting in the later stage is the focus of the design and construction units. Since this is a newly developed dam material, it is necessary to stu...

Claims

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