Test Report of Lazha Line Surface in Yuan County, Xiangxi Prefecture, Hunan Province by Test and Testing Center of Hunan Transportation Planning, Survey and Design Institute

　　

 

　　

 

1. Project Overview

Huayuan County's Lazha Line (Lazha Bay to Zhagou Building) has a total length of 30 kilometers. At present, our company has just completed the construction of 12 kilometers, and another 18 kilometers were built in 2006. At that time, due to the cold weather, the surface of the road was seriously pitted. Due to the large traffic flow and too many overloaded vehicles, the middle road surface sank, and the whole road surface showed a phenomenon of low middle and high on both sides. This highway construction standard is subgrade 6.5M, pavement 5.5M, in order to extend the service life of the highway, the use of multiple multiple rubber powder fiber modified cement roller compacted concrete thin layer overlay technology to upgrade the 18km road surface.

Overview of 2. detection

Through testing, the relevant indicators to characterize the engineering quality of the Lazar line surface are provided.

The test contents include: pavement surface layer thickness, pavement deflection, flatness, pavement friction system and gross bulk density of pavement structural layer.

3. subgrade and pavement inspection process

　　

 

4. Detection

It entered the site on November 14, 2013. The main tests are as follows:

November 14: Subgrade and pavement comprehensive detector detects flatness and pavement core drilling samples;

November 15: The lateral force coefficient vehicle detects the lateral force coefficient of the road surface and the core sampling of the road surface'

November 16: Beckman beam testing pavement rebound deflection;

November 18-November 29: indoor test, data collation;

December 2-December 9: preparation of report.

Part of the inspection site work pictures are as follows:

　　

Detection of flatness by comprehensive detector for subgrade and pavement

　　

Detection of Pavement Rebound Deflection by Beckman Beam

　　

Lateral force coefficient of road surface detected by vehicle

Main personnel, equipment and workload of 5. inspection

Key personnel:

1. Name: Wang Xin Title: Engineer Position: Project Leader

2. Name: Zhou Xie Title: Engineer Position: Technical Director

Main equipment:

1. Doppler subgrade and pavement comprehensive tester 1 set

2. Beckman beam 2 sets

3. One truck

4. One lateral force coefficient vehicle

5, 3M steel tape 1

6. One coring machine

7. Tool cart 1

8. Traffic car 1

Completed workload:

1.18 coring samples

2.18 points of pavement surface layer thickness

3. Deflection 77 points

4. Comprehensive modulus of resilience of subgrade and pavement 18km

5. Flatness 18km

6. Lateral force anti-sliding friction coefficient 18km

7, gross volume density 18.

Summary of Test Results

1. Thickness, 18 qualified points

2. Deflection, measuring point 18 (KM representative value),7-51(0.01MM)

3, flatness, qualified points 18

4. Anti-sliding friction coefficient of lateral force, 15 qualified points

5, gross volume density, 2.256-2.416

6. test results