Method for rapidly detecting and evaluating compaction quality of road inorganic stabilized grain base

Abstract

The invention discloses a method for rapidly detecting and evaluating the compaction quality of a road inorganic stabilized grain base. The method comprises the following steps: 1, detecting the deformation modulus Evd of the road inorganic stabilized grain base under different compactnesses K by adopting PFWD through onsite test, establishing a relationship between the roadbed compactness K and the deformation modulus Evd through regression, and calculating the Evd0 value of the road base under a required compactness according to the regression relationship; 2, carrying out PFWD detection on a constructed and compacted road to obtain the Evdi values of different detection points, and calculating the deformation modules representative value Evdp of an evaluation segment; and 3, evaluating the compaction quality of the base. The method is used for rapidly and destructively evaluating the compaction quality of the road engineering grain base material in the road grain base construction quality control process.

Description

technical field [0001] The invention belongs to the technical field of road engineering material performance detection and construction quality control, and relates to a method for rapid and nondestructive detection of the compaction quality of inorganic stable granular materials. Background technique [0002] In the current "Technical Rules for Construction of Highway Pavement Base Course" (JTGF20-2015), it is stipulated that the road engineering inorganic binder stabilized aggregate base (cement stabilized gravel, cement stabilized gravel, fly ash stabilized gravel and three ash stabilized gravel) The compaction quality inspection adopts the sand filling method, and the sand filling method has the following disadvantages: [0003] (1) Time-consuming and labor-intensive, lack of real-time guidance [0004] When the diameter of the test pit is 20cm, the average detection time is 30-35Min / point, and the detection result is used to guide the compaction, which has serious hyst...

AI Technical Summary

Problems solved by technology

[0003] (1) Time-consuming and labor-intensive, lack of real-time guidance

[0004] When the diameter of the test pit is 20cm, the average detection time is 30-35Min / point, and the detection result is used to guide the compaction, which has serious hysteresis;

[0005] (2) There are many human factors and the accuracy is not high

[0006] Human factors such as the wet condition of the standard sand, the calibration accuracy, the shape of the compaction test pit and the method of water content measurement have a great influence on the compaction test results, and it is difficult to guarantee objectivity

[0007] (3) Destructive testing, small evaluation range

[0009] (4) Transitional indicators, unable to reflect mechanical properties

[0010] Whether the road structure is durable or not is related to the mechanical indicators of each layer, but physical indicators are currently used to control the construction process, which is a transitional indicator and cannot directly reflect its mechanical properties

Images