Quick detection method for compaction degree of thick-layer aeolian sand roadbed

Abstract

The invention relates to a quick detection method for the compaction degree of a thick-layer aeolian sand roadbed. A sand filling method is generally adopted for site detection on the compact degree of a thick-layer aeolian sand embankment, which is multiple in procedures, is seriously affected by weather conditions and human factors and can hardly meet the requirement of large-scale continuous filling and rolling operation of embankments. According to the quick detection method, the maximum dry density of the aeolian sand is first determined as standard dry density rho max; layer-by-layer detection on the compaction degree in the detection depth scope is carried out on two adjacent embankments up and down; a plurality of representative points are taken from the to-be-detected aeolian sand embankments to carry out sand-filling-method detection on the dry density rho i of the aeolian sand embankments, the aeolian sand layered compaction degree Di is calculated in combination with rho max; and a relevant relational expression between the compaction degree Di and the dynamic sounding hammering number N10-15 as well as the detection depth h is established. When other to-be-detected road segments are detected, the layered compaction degree of the aeolian sand embankments can be obtained by a dynamic sounding test. The quick detection method is large in detection depth, multiple in data and simple, is less affected by weather and human factors, and can be used for detecting in windy and dusty weather.

Description

technical field [0001] The invention belongs to the technical field of traffic construction, and in particular relates to a method for quickly detecting the compaction degree of a thick-layer aeolian-sand subgrade. Background technique [0002] The on-site compaction test of aeolian sand embankment generally adopts sand filling method. [0003] The main disadvantages of the sand filling method are: the sand filling method requires site leveling, sand filling bucket calibration, drilling, sand filling, weighing and other work. It has many procedures, time-consuming and laborious, and it takes half an hour to obtain a data. Above; the results are greatly affected by weather conditions and human factors. On the other hand, the drying method is often used for the moisture content of the sample. For sandy soil, the drying time is not less than 6 hours, and the test period is long, which is difficult to meet the requirements of large-scale continuous filling and rolling operation...

AI Technical Summary

Problems solved by technology

[0003] The main disadvantages of the sand filling method are: the sand filling method requires site leveling, sand filling bucket calibration, drilling, sand filling, weighing and other work. It has many procedures, time-consuming and laborious, and it takes half an hour to obtain a data. above; the results are greatly affected by weather conditions and human factors

On the other hand, the drying method is often used for the moisture content of the sample. For sandy soil, the drying time is not less than 6 hours, and the test period is long, which is difficult to meet the requirements of large-scale continuous filling and rolling operations of embankments; and the alcohol burning method , it cannot be used in windy weather, and the moisture content data obtained by the alcohol combustion method deviates greatly from the drying method, so it cannot be used as a standard method

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