What Distinguishes Breast Walls From Retaining Walls?
2bhk Kharghar Breast Walls : To support and sustain the naturally occurring slope of the earth at the hill face, engineers construct a wall at the downstream end of the embankment known as the breast wall.
In order to prevent newly cut slopes on steep hillside embankments from rolling down the hill as a result of unfavourable weather conditions, such as sliding and land erosion, breast walls are constructed. The inclinations and slicing slopes of the hillside might affect how sturdy the road is in steep places.
Travel is prohibited in steep areas where rain might cause small landslides. You may have passed through mountainous areas where the road is frequently covered with tiny stones and other debris after a rainstorm. Such a situation looks unacceptably risky and hazardous. One way to stop these modest slope fragment slips and slides is by using a breast wall. It is the most economical way to protect the edge of the road shoulder from the slope’s toe.
By integrating features like the breast wall, designers take into account the potential of slipping or sliding on a road. The typical breast wall is three metres high and is made of masonry stonework set in concrete mortar.
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What is a breast wall?
To support and sustain the naturally occurring slope of the earth at the hill face, engineers construct a wall at the downstream end of the embankment known as the breast wall. This wall acts as a deterrent to land-sliding, erosion, and slippage failure on the slope.
Benefits of the breast wall
A breast wall is used for a variety of tasks when it comes to cutting the margins of hillsides during building projects, including creating a road passage through the mountain. The advantages of the breast wall include:
- As a result meteorological factors including erosion, heavy rain, and other factors, prevent soil on a natural barrier gradient from rolling down.
- It is also appropriate for Hydraulic structural components.
- Somewhat aids in the prevention of natural disasters like landslides and slope failures.
- It is cost-effective.
- With indigenous labour and resources, construction can be completed.
- Motorists’ safety has improved as a result.
A breast wall’s drawbacks
Although the breast wall is a reasonably priced fix for sliding problems in hilly areas, it nevertheless has a number of shortcomings.
- A breast wall cannot be utilised to support a slope of rock or soil that is geologically unstable or cracked.
- It is useless at stopping larger landslides that have a higher surcharge load and can only stop tiny landslides.
- Too much upkeep is required for the breast wall. You can encounter problems with the wall tilting and weep holes being clogged during wet seasons.
Breast wall: Functions
A breast wall is a low stone wall that protects the natural earthen bank.
- This type of wall separates the road from the newly cut or old natural surface of a geological slope.
- It is primarily taken into account in areas where the climate and rainfall pour over the grade of the hill to prevent mountain landslides.
- Additionally, it avoids unanticipated soil slides.
- In order to retain the look of a natural earthen embankment, it is utilised along the edge of the streets.
- It is used along riverbanks to hold the surrounding earth in place.
How should a breast wall be built?
Many components of the breast wall design must be taken into account when establishing the basis or strategy for the design’s implementation, for example:
- Due to the magnitude of the earth surcharges, the breast wall requires a wider foundation. Due to the increased risk of sliding and falling, the breast wall shouldn’t be taller than three metres.
- Several factors, such as the minimum needed wall height, the durability of the supporting structure, and the slope of the excavation, affect the design of a breast wall.
- To reduce the stress caused by saturated soil near the barrier, weep holes must often be built up.
- It is anticipated that ground pressure or thrusting will exert pressure parallel to the breast wall.
2bhk Kharghar Breast Walls : Where is there a breast wall?
Breast walls are typically stone masonry barriers built to keep unstable carved slopes and the surrounding environment away from naturally occurring land-cutting gradients, but not from the force of snowfall avalanches. An uneven slope cannot be supported by a toe wall. It is often provided on the downstream side of the roads that are adjacent to any steep or mountainous areas to prevent damage during construction or on ordinary days. The earth pressure is significantly reduced by a breast wall with a considerable negative batter on the edge of the cut slope. Therefore, even a small portion of the breast wall can withstand cut gradients in the soil if it is positioned on a rock or other firm natural soil.
Formula for designing breast walls
Use the following formula to calculate the total wave force striking the breast wall at a wave peak.
Cp=0.24γHKp
Where KP stands for the ordinary pressure coefficient for a non-dimensional variable and Cp represents the overall wave pressure in kPa. The actual height of the wave is h, whereas “M” denotes the surge amplitude.
What distinguishes a breast wall from a retaining wall?
Many civil engineers can’t tell the difference between a retaining wall and a breast wall. However, in terms of their intended use and design goals, these two buildings are different from one another.
In general, the breast wall is a more compact building than the retaining wall. This calls for the usage of only breast walls less than three metres. Breast walls in steep areas can only bear pressure from recently cut soil.
The retaining wall is designed to resist the weight of the road and the backfill. A breast wall, however, can only support a maintained sloping surcharge.
In a typical design or cross-section of a road, one may observe a retaining wall that is built at an elevation lower than the road level. The breast wall is the portion of the wall that is constructed above the level of the road.
The primary distinction between retaining walls and breast walls is that the former are constructed upstream of a road formation, whilst the latter are constructed downstream.
2bhk Kharghar Breast Walls : What is a retaining wall?
Retaining walls are structures built to support the ground against their rear. The angle of repose is a natural angle that the ground naturally assumes in order to achieve balance because it cannot remain in a vertical posture. The retaining wall must sustain the section of the ground that has to be in a vertical posture.
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