Saturday, 2 June 2018

MSRDC uses Italian, Swiss systems for rockfalls


2/6/2018

PUNE: The Maharashtra State Road Development Corporation (MSRDC) has harnessed Italian and Swiss techniques to control rock falls and landslides in the Bor ghat section of the Pune-Mumbai expressway, especially during the monsoon.

MSRDC officials are employing techniques like high-tensile strength wire-nets and rock-bolting at rockfall-prone areas. The MSRDC has finished installing wire meshes at 85-90% of the critical areas in this section.

Officials state preventive measures are being undertaken as per guidelines provided by the IIT-Bombay. “A geo-morphological study and survey was conducted at Khandala tunnel, Amrutanjan Bridge and Adoshi tunnel to identify loose rocks. This was followed by loose scaling and removal of such rocks,” an official said.

While travelling through the ghat section, one can see men and machinery on engaged in installing meshes or rock-bolting. Shotcreting was done on a patch between Khandala exit and Khandala tunnel. “This time we are installing spider mesh, tecco mesh or quorex mesh, depending on the condition of the rocks. Multiple meshes have been used at certain spots to increase the holding capacity of the mesh,” said a supervisor working near Khandala tunnel.

MSRDC is also digging gutters where necessary. “We have taken up de-silting and cleaning of drainage lines across the ghat section of the expressway. Around 125 people are involved in pre-monsoon works, which cost Rs52.19 crore,” an MSRDC official said. While one supervisor said the work would be complete by June, the MSRDC did not commit to this, only stating that it is in its final stages.

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