KL Sentral Railway Rehabilitation Project, Kuala Lumpur, Malaysia
KL Sentral (KVDT) – The Klang Valley Double Track Project
As part of KTM Berhad (KTMB) efforts to improve the quality of its services to the public, the Klang Valley Double
Track (KVDT) project involves infrastructure and system upgrades to ensure safe, reliable and comfortable train
The KVDT project entails the rehabilitation of 42 kilometres of tracks between Rawang and Salak Selatan as well
as Sentul and Simpang Batu. Through this initiative KTMB will focus on enhancing 16 stations along these routes
and upgrade the existing signalling and electrification system.
Scheduled to run between 2016 and 2019, this project is crucial to ensure smoother train commutes and alleviate
problems such as delays and cancellations due to failure and derailment.
The scope of work for KVDT:
2. Use of DAMTEC® SBM K 25/7 – Calculation
DAMTEC® SBM K 25/7 is an isolation and protection mat for railway track constructions, proofed in accordance to DIN 45673-5 – mechanical vibrations – resilient element used in railway tracks – part 5: laboratory test procedures for under ballast mats. The SBM mat absorbs vibrations and reduces acoustic emission as well as structure borne sound transmission. It is also effective in reducing the frequency of the ballast maintenance requirement through reduced vibration and better balanced loading. It protects construction and waterproofing.
|max. dynamic displacement rail without SBM solution||0.33||mm|
|max. dynamic displacement rail with SBM K25/7||2.52||mm|
|max. static displacement rail with SBM K25/7||2.58||mm|
With our data based on our tests and experience we want to advise you the best of our knowledge and belief. The mats have been approved by German Railway DB AG. Until further notice, each application in the network of German Railway requires the approval of the DB AG.
Delivery and Storage
DAMTEC® SBM K 25/7 is supplied in 4m long rolls on pallets. The product requires dry storage; for longer periods the material should remain shrink wrapped with rolls stored vertically. Accessories should be treated and stored according to the data sheets.
Substrata and Preparations
Suitable bedding layers are compacted gravel, compacted formation, cement and bitumen bound base courses. Plastic liners can cause degradation of the SBM layer and should be checked for chemical compatibility. In case of doubt only a PE or PP geotextile of minimum weight 250 g/m² should be used between the liner material and the DAMTEC® SBM K layer. The elasticity of the SBM mat allows for the absorption small undulations in the bedding layer. Large undulations and protruding edges as well as loose sharp objects than can puncture or damage the SBM mat should, however be avoided as these can reduce the sound isolation properties of the matting.
Installation of Sub Ballast Mat
The mats must be laid at right angles to the track axis. The mats can be cut using a low speed sabre tooth timber saw or carpet knife and a steel straight edge. Before cutting ensure that the material is supported on an even hard surface. Vertical sections can also be fixed using temporary mechanical devices (e.g. clamps, etc.). Ensure that no metal fixings are left in place that can cause sound bridging.
Joints have to be sealed using a special approved 100 mm wide tape (type Gerband 602.25, 1 x 100 x 20.000 mm). While sealing the sub ballast mat has to be dry.
Installation of geotextile protective membrane
Prior to the installation of the ballast it is necessary to cover the SBM surface with a geotextile protective membrane in order to protect it from dust clogging and abrasion. It is useful to overlap the geotextile 0,50 m for loose laid applications.