#foundation design

Website: https://www.saclcanada.com/foundationdesign Address: 5360 Canotek Road, Unit 5, Gloucester, ON, K1J 9E3, Canada SACL’s foundation design focuses on innovative and highly accurate static load testing technique for assessing pile foundation axial capacity. Renowned for its speed and reliability, bidirectional testing has become an invaluable tool in the industry. SACL engineers have enhanced this method with automated testing systems and data acquisition software, reducing human error and increasing measurement accuracy. #Environmental Services#foundation design

Introduction: Geotechnical earthquake engineering is a critical field that plays a pivotal role in ensuring the safety and stability of structures in seismic regions. With the ever-present threat of earthquakes, understanding how geotechnical engineering can protect lives and property is paramount. What is Geotechnical Earthquake Engineering? Geotechnical earthquake engineering is a specialized…

Looking for Combined Footing Foundation Software? ASDIP FOUNDATION is a structural engineering software for the design of concrete footings which includes the design of combined footings, based on the ACI 318 provisions. If you want to learn the step-by-step design example of an eccentric combined footing using ASDIP FOUNDATION software, follow this link.

The foundations should remain as shallow as possible, in conformity with climatic effects and strength of the surface soil; specifically in waterlogged ground.

For large underground structure, shoring work design details should be perfectly defined. The structure should be considerably inflexible.

Foundation design should be inexpensive & supported with updated technology to curtail piling cost. Ground treatment work should be carried on consequently.

Designers should be well versed with the presumptions provided in design, the changeability of ground conditions, the occasional in-applicability of refined soil analyses and the feasibiity of construction.

Soil investigation report should be prepared by an experienced Geo-technical Engineer. The assessment report should comprise of all essential data.

The construction on ground properties provides various impacts like vibration from piling, damage of ground due to excavation in unfavorable weather conditions, elimination of overburden, periodical change in the water-table, compaction of the ground by construction plant.

Impact of unstable shape, length and inflexibility of the foundation, and the requirement for movement and settlement joints.

After-effects on completed foundations concerning sulfate attack on concrete, ground movements because of frost heave, shrinkable clay, and the impacts of trees; also alterations in local environment, e.g. new construction, re-routing of heavy traffic, installation of plant in adjacent factories creating impact and vibration.

Fast but expensive construction may be more economic than low-cost but slow construction to clients needing quick return on capital investment.

Impact of new foundation loading on current adjacent structures.

Raft foundations alias Mat Foundations belong to a large concrete slab that provides strong support to a number of columns and walls. The slab is expanded under the entire building or relatively a large part of it which reduces the contact pressure in contrast to the conventionally utilized strip or trench footings.

Raft foundation refers to a dense concrete slab that is reinforced with steel to cover the whole contact area of the structure like a dense floor. Occasionally area covered by raft may be more than the contact area based on the bearing capacity of the soil below. The reinforcing bars operate normally to each other in both top and bottom layers of steel reinforcement.

Mat/Raft Foundation is suitable under the following conditions :-

• If the soil has low bearing strength, • Walls of the structure are very adjacent so that individual footings would over hanged.

• It is suitable for large loads,

• Individual footings would cover in excess of about half of the construction area.

Benefits of Raft Foundation

• Raft or mat foundation is cost-effective because foundation and floor slab are combined in it.

• Little excavation is necessary for raft foundation. • It can make adjustment with mixed or poor ground condition. • It decreases differential settlement.

Given below, the sample of an excel sheet to create the design of raft foundation.

Few days ago, engineer SL khan nicely demonstrated about the details of designing a square shaped reinforced concrete column with the help of the ACI codes.

In today's session of learning the author brought to you the most recent details on the topic of designing a circular shaped reinforced concrete column. This exclusive design is performed by the presenter on the basis of the ACI codes too.

Aim of this tutorial

The principle of this tutorial lies in designing a circular tie column to support an axial dead load of 250 kip and an axial live load of 305 kip. First of all, the design begins with 2% Ast also fc’ = 4ksi , fy = 60 ksi .

Inside the provided video below you will find the solution of the column design. Basically the solution has been gone through in six steps which are described below:

1. By determining design axial load = pu.

2. Reinforcement ratio should not be less than 1% not more than 8%.

3. Measure the section size or gross area = Ag.

4. By the help of gross area calculate quantity of reinforcement = Ast.

5. Concrete cover should be assumed as 1.5 in.

6. Finally, perform a detailing check.

The Solution