DRAINASE JALAN KERETA API

Kuliah DRAINASEWahyu WidiyantoUnsoed

Tipikal Potongan Melintang Jalan Rel

Balast

BalastBantalan

Rel

Rel

Tujuan

Menghindari genangan Mencegah erosi balast Menjaga badan jalan kereta tetap stabil Menjaga kuat dukung konstruksi

Dasar-dasar Perencanaan

Sejajar dengan jalan kereta api dibuat selokan drainase di kiri dan kanan badan jalan.

Pada balast atau alas jalan bagian bawahnya diberi konstruksi drain batu kosongan melintang jalan dengan jarak antara 6 m diselang-seling kiri dan kanan, untuk mengeringkan dengan segera air hujan yang meresap.

Talud pada jalan kereta api di atas timbunan harus pula dilindungi terhadap erosi dengan membuat konstruksi drain terbuka, batu kosongan yang dilapisi ijuk untuk menjaga butir-butir tanah tidak ikut larut terbawa air hujan. Konstruksi ini berfungsi memperkuat talud. Drain batu kosongan ini pada bagian bawahnya disambung dengan selokan drainase yang sejajar sumbu jalan.

Ke arah memanjang juga harus diperhatikan mengenai kemiringan selokan, minimal 2%, maksimal 10 %. Jika kemiringan > 10% harus dibuat konstruksi bertangga agar air hujan tidak menimbulkan erosi.

Drainase Drainase

Drainase

Railroad DrainageThe following “Before” images show drainage issues under and around railroad tracks.

Railroad DrainageThe following “Before” images show drainage issues under and around railroad tracks.

Railroad DrainageThe following images show clean drainage structures and drainage rehab that have been performed utilizing trenchless technology.

Railroad DrainageThe following images show clean drainage structures and drainage rehab that have been performed utilizing trenchless technology.

Railroad DrainageThe following images are drainage structures that have been relined and extended using trenchless technology.

Railroad DrainageThe following images are drainage structures that have been relined and extended using trenchless technology.

Railroad DrainageThe following are images of wick bores under the railroad tracks. The wick bores are designed as a subsurface drainage removing unwanted water from under the tracks.

This image shows the “mud pots” that are caused by unwanted water under the tracks.

Railroad DrainageThe following are images of wick bores under the railroad tracks. The wick bores are designed as a subsurface drainage removing unwanted water from under the tracks.

Wick bores are installed using trenchless technology. The advantage of this is uninterrupted railroad traffic.

Railroad DrainageThe following are images of wick bores under the railroad tracks. The wick bores are designed as a subsurface drainage removing unwanted water from under the tracks.

The following is the casing that will be pulled back under the tracks. Inside the casing is a wick drainage pipe. Once the casing and wick pipe are pulled through, the casing will be pulled out leaving the wick pipe in its trail under the tracks.

Railroad DrainageThe following are images of wick bores under the railroad tracks. The wick bores are designed as a subsurface drainage removing unwanted water from under the tracks.

The following is the downhill, outlet side of the wick pipe. This image shows the casing being removed leaving the wick pipe under the tracks.

Railroad DrainageThe following are images of wick bores under the railroad tracks. The wick bores are designed as a subsurface drainage removing unwanted water from under the tracks.

After the wick pipe is installed, a short piece of casing will be installed on the outlet end for support.

Railroad DrainageThe following are images of wick bores under the railroad tracks. The wick bores are designed as a subsurface drainage removing unwanted water from under the tracks.

This image shows 3 wick pipes draining subsurface water from under the tracks.

Railroad DrainageThe following are images of wick bores under the railroad tracks. The wick bores are designed as a subsurface drainage removing unwanted water from under the tracks.

This image shows a drainage pipe stand at the inlet side of the wick bore.