Slope Surface Protection, Keelung, Taiwan

Keelung is a densely populated city and surrounded by the mountains; therefore, a majority of the residential districts are built on the slope. Daching community in Keelung with the population of 7,000 people only accessed to external by an 8-meters-width road, so the residents concerned that it could be inconvenient and perilous if any disaster occurred. Wherefore, Keelung government was requested to propose to construct another road passing through a hill so as to enhance the convenience of transportation.

With the proposed construction of building another road passing through the hill, it is crucial to stabilize the slope by way of stable and sustainable construction method.

Considering to the budget issue and the good geological condition, the contractor used benching open-cut for the road section across the hill. The gradient of the excavated slope is 20 to 40 degrees with 40 meters high. The slope surface was placed a layer of ACECell™ HDPE geocells and filled up the soil mixed with plant growing medium for vegetation. The soil nails were installed subsequently to the placement of ACECell™ geocells to improve the stabilization of the slope; a series of ditches were installed for surface water drainage as well.

So far, the slope is still in a stable and strong condition and plants grow well and dense to make the slope look like a real natural hill.