Retaining Wall Cost Factors

While the material, height and length will contribute more than anything, there are other remote factors that can increase or decrease your retaining wall cost:

Location

Sadly, some areas of the country see more extreme weather than others, ranging from tropical storms to earthquakes. If you live in such a location, your retaining wall may require greater structural reinforcement and extensive waterproofing, both of which increase the cost to build a retaining wall.

Excavation

Certain landscapes and existing retaining walls require more excavation. For example, it’s much easier to remove dirt if no retaining wall is present versus replacing an existing wall with stone and boulders already in place. If you have a retaining wall and want to save some cash on a masonry pro, remove as much of the old wall as possible.

Type of Soil

All soils were not created equal. Some soils can hold more water, while others are only ideal for very short retaining walls. In addition, bedrock, used for taller walls, can drive up your total cost.

To get a brief idea of your soil costs, refer to our soil delivery task estimator.

Steps

Some homeowners install steps for their retaining walls. Whether it’s a safety precaution or not, this project will require more materials and time and as such, raise your total retaining wall cost.

Accessibility

Retaining walls can be placed all over the front or backyard, however, the easier it is to access, the cheaper your project will be. Stone blocks and bags of soil are heavy. If a mason can drive the stones and bags to the exact location, the total installation time drastically reduces. If not, the job gets that much more difficult, increasing your total retaining wall price.

(This article comes from ImproveNet editor released)

INSTALLATION OF RETAINING WALL – SHEET PILE WALL

The following pictorial guide illustrates the installation sequence of a typical sheet pile wall. This type of retaining wall was used for the construction of HarbourFront Station on the North East Line (NEL).

  1. Position of Sheet Pile
    A guide frame/guide beam is placed on the ground to set out the position of the sheet pile wall.
  2. Installation of First Sheet Pile
    The piling rig lifts up the first sheet pile and drives it into the ground, leaving about 1 metre length of the sheet pile above the ground level.
  3. Installation of Second Sheet Pile
    The piling rig drives the second sheet pile into the ground and the second sheet pile interlocks with the first sheet pile.
  4. Repetition of Process
    Process 2 and 3 repeats till the installation of sheet piles is completed within the length of the guide frame/ guide beam.
  5. Extension of Sheet Pile
    If the first set of sheet piles installed are not long enough to reach the required depth in the ground, extension of sheet piles is required. This is done by welding the ends of a second sheet pile length to the one driven in earlier and driving the combined length into the ground.

(This article comes from www.lta.gov.sg editor released)