COUNTERFORT RETAINING WALL PDF
Classification of. Retaining walls. • Gravity wall-Masonry or Plain concrete. • Cantilever retaining wall-RCC. (Inverted T and L). • Counterfort retaining wall- RCC. Types of reinforced concrete retaining walls are cantilever retaining walls and counterfort retaining walls. Functions and parts of these retaining walls. In this type of retaining wall, counterforts (cantilevers) are provided on the earth side between wall and footing to support the wall, which essentially spans as a.
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The pressure mainly depends upon the type of backfill material and the height of wall. The stability of the wall is partially provided by the weight of earth on the heel. The inclined fill is also known as surcharge.
The lateral pressure due to the backfill and surcharge if any tends to overturn the retaining wall about its toe. Wall with backfill ertaining and subjected to uniform surcharge: This buttressed wall is identical to a counterfort retaining wall with the main difference that the vertical brackets are provided in front of the wall on face opposite to the face retaining back fill as shown in Fig.
To meet this requirement the resultant of the sum of all vertical forces and the horizontal active pressure should cut the base of the wall within the middle third. Towards reliability-based design for geotechnical engineering Kok Kwang Phoon Reliability analysis of cantilever retaining walls. Structural Reliability Analysis and Design.
D&S_1: LESSON Cantilever Retaining Walls
Wall retaining submerged backfill. The retaaining of the retaining wall should be placed at such a depth where soil of required bearing capacity is available. The wall is so proportioned that the dead weight reetaining the wall provides required stability against the thrust exerted by the backfill including surcharge if any. Wall retaining backfill in slope.
The brackets in this case are known as buttresses and by virtue of their location they are subjected to compressive forces. The pressure thus developed is termed as soil earth pressure. It is also assumed that the retaining wall is allowed to move away from the soil by sufficient amount so that the soil expands and evokes full shearing resistance and attains state of plastic equilibrium.
Reliability—based design applied to retaining. Retaining walls are structures constructed aall the purpose of retaining earth or other materials like coal, ore, water etc.
Four Common Types of Rigid, Monolithic Concrete Retaining Walls
These walls are constructed in brick masonry, stone masonry or plain cement concrete and it is shown in Fig. The more the height of the wall, the closer should be the spacing of counterforts.
The backfill may be horizontal i. It may also be defined as a wall provided to maintain ground at two different levels. Design of RCC footing for Wall.
Walls of a building Simulation. The material retained by the wall is generally known as backfill. However suitable value of toe projection can be obtained from the relationship. The counterforts are provided behind the wall on the backfill side and are subjected to tensile forces. Counterfort Retaining Walls When the height of the retaining wall to be provided exceeds 6 to 7m, counterfort retaining wall prove to be economical.
COUNTERFORT RETAINING WALLS
Counterfkrt of Two-way Slabs. It is a common practice to neglect the passive resistance of the soil in front of the toe of the wall in this check.
Design of One Way Slabs. Counterfrt of Lintel with Sunshade. Before proceeding with the structural design it is necessary to ensure that the preliminary dimensions assumed for the various components of the wall will render it safe against above referred types of failures.
Design of Isolated Column Footing. To avoid failure of the retaining wall it is necessary that the following requirements are satisfied.
COUNTERFORT RETAINING WALLS
If the requirements of stability are not satisfied, its dimension should be revised. Let the backfill be moist or dry up to a depth h 1 below the top of wall and let the backfill below this depth i. In addition, it should be ensured that no tension is developed at the base i.
The size of the wall is so kept that there is no tensile stress developed at any section of the wall under any condition of loading. When the height of the retaining wall to be provided exceeds 6 to 7m, counterfort retaining wall prove to be economical.