Seawall Construction
Seawall construction is a building which is placed parallel to the coast or approximately parallel to the coastline, limiting the area of land directly to the sea; can be used for safety on muddy or sandy beaches. Seawall construction is made on the condition of beaches were damaged and mitigation efforts undertaken aims to maintain a minimum shoreline on existing conditions, without any replenishment of sand.
In addition, seawall construction is also used when the use of the building perpendicular to the shore crib and crib parallel to the beach without sand filling is not possible since erosion caused by the existence of two buildings, will cause damage to existing facilities and infrastructure. The main function is to protect the sea wall coastal land section directly behind the construction of erosion due to waves and currents as well as retaining soil behind the construction. Sea walls can be created as a massive building and not massive.
In view of the sea wall is a massive structure in the manufacture of the heavy sea wall needs to be investigated soil bearing capacity. If the soil bearing capacity is low and the walls are made without any additional increase of in the carrying structure and the wall Will fall. If the Decrease in the wall is uneven, Will there be damage. Proposed strengthening of land carrying capacity That can be given is by mounting pipe conditions under the wall base.
Massive sea walls can be made of masonry or concrete. Sea walls can be made upright italic, oblique and curved fitted with a cap. Seawall is used when the shoreline is very close to the protected beach facilities. Not massive sea wall is the wall of the sea, known as type rubble mound. Outer protective material of stone or concrete block called armor.
Things that need to be considered in making the sea wall at the foot of the wall is erosion, coastal erosion downstream or downdraft walls, flood and standing water behind the wall, drop in the sea wall caused by the small soil bearing capacity of foundation.
The overflow of water on the back wall of runoff caused by the wave through the tree top wall and the flow of rain water. This can cause a pool of water behind the wall. At low tide the water genengan is flowing toward the sea through the rear wall, a seepage flow. If the unfavorable condition of the back wall of the seepage flow will transport the fine materials that cause holes in the back wall. The holes will weaken the stability of the wall. If these walls crashing the wall will be damaged.
To avoid potential problems that may occur in the structure to create an ideal seawall construction needs to be considered are:
- Creating a protective foot in front of the seawall construction to prevent erosion at the bottom wall
- Adding a filter layer in the back to prevent the entrainment of material refined by the presence of water seepage
- Create a drainage channel in the rear wall to accommodate the rain water and water waves