Nondestructive testing method for compaction quality of rock-soil filled foundation
A technology for compaction quality and non-destructive testing. It is applied in the field of foundation soil survey, infrastructure engineering, construction, etc. It can solve the problems of difficulty in formulating compaction standards, large influence of softness, and restricted development, so as to avoid measuring points. The effect of poor representativeness, high detection accuracy and low cost
A technology for compaction quality and non-destructive testing. It is applied in the field of foundation soil survey, infrastructure engineering, construction, etc. It can solve the problems of difficulty in formulating compaction standards, large influence of softness, and restricted development, so as to avoid measuring points. The effect of poor representativeness, high detection accuracy and low cost
CN102493422AInactive Publication Date: 2012-06-13CIVIL AVIATION UNIV OF CHINA
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[0014] The non-destructive testing method for testing the compaction quality of soil-rock mixed filling foundation provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0015] Such as figure 1 As shown, the non-destructive testing method for detecting the compaction quality of earth-rock mixed filling foundation provided by the present invention includes the following steps carried out in order:
[0016] 1) The S1 stage of collecting soil-rock mixed filling foundation surface wave velocity data: in this stage, if figure 2 As shown, multiple rows of surface wave detectors 2 arranged at intervals are arranged in parallel in the middle of the surface of the soil-rock mixed foundation 1, and multiple rows of surface wave detectors 2 are selected on the surface side of the soil-rock mixed foundation 1 respectively. 2 Hammering point 3 located on the same straight line, and then use hammering, fa...
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The invention discloses a nondestructive testing method for the compaction quality of a rock-soil filled foundation. The nondestructive testing method comprises the following steps of: acquiring wave speed data of surface waves of the rock-soil filled foundation; calculating the macroscopic shear wave speed of a rock-soil mixed material; calculating the shear wave speed of fine grained soil in a rock-soil mixed material; calculating the dry density of the fine grained soil in the rock-soil mixed material to obtain characterization compactness; calculating the compaction quality of the fine grained soil according to the characterization compactness and a standard characterization compactness value; and the like. According to the nondestructive testing method for the compaction quality of the rock-soil filled foundation, which is provided by the invention, reasonable evaluation for the compaction quality of the rock-soil filled foundation is realized by testing the compactness of the fine grained soil; by means of the shear waves and the surface waves as test means, the integral compaction condition of the lower part of the foundation can be reflected and the problem of poor representativeness of a measuring point in a traditional method is avoided; in addition, the nondestructive testing method has the advantages of high detection precision, high speed, low cost and no damage to the foundation, thus the nondestructive testing method is a detection technology which can adapt to modern construction of civil engineering and has a broad application prospect.
Description
technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a non-destructive testing method for the compaction quality of soil-rock mixed filling foundation. Background technique [0002] Due to the advantages of good mechanical properties, low cost and convenient local materials, earth-rock mixture has been widely used in foundation filling of large-scale infrastructure construction such as roads, railways, and airports in plateaus and mountainous areas. The quality of soil-rock mixed filling foundation compaction is directly related to the strength and stability of the foundation, and affects the service life and operation safety of these large-scale infrastructures, thus becoming one of the key factors determining the quality of engineering construction. At present, there are many testing methods for the compaction quality of soil-rock mixed filling foundation, and the common ones are density method, resistance testin...
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Patent Timeline
13 Jun 2012
Publication
CN102493422A
- IPC
- E02D1/00
- Inventors
- 张献民; 张宇辉