Utvärdering av djupdränering och effekt av tätad stödremsa och innerslänt utmed väg 126, Torpsbruk

Download
Klas Hansson
Lars-Göran Svensson
Kent Enkell

Experiments show that the deep drainage system is an effective method to control the groundwater table and, concerning road construction, it is recommended as a method when the road is located in earth cut below the ground surface in combination with high groundwater table. However, it is important to maintain the drainage system.

Along route 126 near Torpsbruk, the Swedish Transport Administration for many years had problems with bearing capacity, potholes and other deterioration. The problem obviously exists due to a combination of factors such as poor construction material, and high water content in the construction.

VTI experiments show that the deep drainage system is a very effective method to control the groundwater table. This was supported by the plugging trials. The water levels increased and decreased rapidly in connection with plugging and opening of the deep drainage system. Deep drainage is also a very effective method to control the water content in the road when the groundwater table is high in the road construction. Sealing of the road verge and embankment slope affected the dynamics of water content in the road. To investigate the infiltration of rain and road water some part of the road shoulder was sealed with a plastic tarpaulin.

The results can be used to evaluate if the use of sealed road shoulders might be an appropriate maintenance action. To evaluate the long-term effect of this action on the road construction and durability the measurements have to continue for a longer period of time.

MEET US


19-20
Oct

ERPUG 2017

The five year anniversary of  European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017. 

LATEST NEWS


2017-07-05

Vehicle Driver Monitoring: sleepiness and cognitive load

To prevent road crashes it is important to understand driver related contributing factors, which have been suggested to be the critical reason in 94 per cent of crashes. The overall aim of the project Vehicle Driver Monitoring has been to advance the...


2017-06-29

Tomas Svensson new director-general

Tomas Svensson was today appointed Director-General of VTI. Tomas has been acting Director-General since January 2017. 


2017-05-30

Crash testing bicycles at VTI

For the first time single bicycle crashes have been simulated at the VTI crash safety laboratory.


2017-05-15

A case study exploring firefighters’ and municipal officials’ preparedness for electrical vehicles

A VTI-study presents a social perspective on new vehicle technology. It explores the self-reported preparedness of the fire departments (i.e., rescue services) in Sweden’s three largest cities regarding rescue operations involving electrical vehicles (EVs).


2017-05-02

Pioneering research on and about bicycles at VTI

Under what circumstances might cyclists lose tyre grip? What actions could then be taken to prevent a crash? VTI is currently developing a theoretical model of the behaviour of bicycle tyres during braking and steering in different situations and on different...


2017-05-02

Virtual pedestrians create efficient stations

If more people are to choose sustainable travel, then the public transport stations of the future must be designed so that pedestrians can get where they are going quickly, without congestion or queues. The Swedish Road and Transport Research Institute (VTI)...