5 The proposed design of the footing of a multi-storey shopping complex building consists of a 3m wide square footing subjected to a contact pressure of 0.9MN/m. The unit weight of the soil supporting the footing is estimated to be 20kN/m and ground water was expected to be at great depth. You are planning a site investigation for the project. If it is specified that the boring should be carried to a depth where the increase in stress due to the foundation loading is less than 20% of the effective overburden pressure, determine the minimum depth of test boring You may assume

5 The proposed design of the footing of a multi-storey shopping complex building consists of a 3m wide square footing subjected to a contact pressure of 0.9MN/m. The unit weight of the soil supporting the footing is estimated to be 20kN/m and ground water was expected to be at great depth. You are planning a site investigation for the project. If it is specified that the boring should be carried to a depth where the increase in stress due to the foundation loading is less than 20% of the effective overburden pressure, determine the minimum depth of test boring You may assume

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

soil mechanics
A strip footing 10 ft wide is loaded on the ground surface with a pressure equal to 4177 lb/ft 2 . Calculate vertical stresses at depths of 3, 6, and 12 ft under the center of The footing?
A plate load test is carried out on a 60 cm square test plate at a depth of 3 m below ground surface on a sandy soil which extends upto a large depth. The settlement of a 3 m x 3 m foundation, carrying a load of 110 tonnes and located at a depth of 3 m below ground surface is table below. (Linear interpolation can be done). Test results are shown in a Load intensity (t/n²) 10 15 20 25 30 35 Settlement (mm) 2.0 4.0 7.5 11.0 16.3 23.5 34.0
In a plate load test on a soil, at a particular magnitude of the settlement, it was observed that the bearing pressure beneath the footing is 100 kN/m2 and the perimeter shear is 25 kN/m². Corresponding, the load capacity of a 2 m square footing at the same settlement will be
Kindly solve both a and b
A rectangular footing of B=3 and L=6 rests at the depth of 2 m below theground level. The stress induced by the footing is 40 kPa. The unit weight of the soil is 18kN/m3and the groundwater table is at a great depth. A pipeline is to be constructed under thefooting. In order to design the strength of the pipeline, calculate the stress increase on thepipeline by using Boussinesq’s Method in the case:a) Pipeline at 5 m below the centerline of the footingb) Pipeline at 5 m below the corner of the footing
Soil mechanics
The figure below shows a proposed foundation site, with 10 ft of sand overlying 20 ft of clay with consolidation properties shown. The clay is normally consolidated. Assume 1-D conditions.a. Compute the initial σ′v at the middle of the clay layer prior to excavation and constructionb. After excavation and during construction, the foundation area will be heavily loaded with the structure and equipment so that σ′v at the middle of the clay layer will be increased to 3900 psf. Determine the settlement that will occur under these conditionsc. After construction is completed, the equipment will be removed and the final σ′v at the middle of the clay layer will be 3200 psf. Compute the swell that occurs after the equipment is removed
3. There is a rectangular foundation, foundation soil stratification, self-weight stress and additional stress calculation results are shown below (stress in kPa), foundation soil compression test results are shown in the following table, the requirement of the basic formula of one-way compression using the sum of stratification method to calculate the compression of the second layer of soil. Results of foundation soil consolidation test p (kPa) 0 200 e 1.00 First layer Second layer The third layer 50 34 48 0.93 0.85 0.80 18 100 26 27 35 150 52 100 0.4m 0.4m 0.6m 0.77 0.9m C C t
An Engineering consultant appointed on the construction of a Bridge site decided to conduct the Plate load test to get fair idea about the bearing capacity of the sub soil. The test was conducted on a circular plate of 200 mm radius at a depth of 1.20 m below the natural ground surface in pure clayey soil. The failure took place at a load of 55000N. i. Calculate the safe bearing capacity of a 1.2 x 1.4 m rectangular footing founded at a depth of 1.75 m in the same sub-soil. Consider the factor of safety & bulk unit weight unit of 2.25 & 19.8 kN/m' respectively. ii. Highlight any three disadvantages associated with the above in-situ test.
A 2m x 4m rectangular footing has to carry a uniformly distributed load of 120 kPa. As per the 2:1 dispersion method of stress distribution, What is the increment in vertical stress (kPa) at a depth of 2 m below the footing?
The footing shown below is subjected to uniform load of 300 kPa. a) Calculate the vertical stress component 2 m below point A. b) Resolve above problem using Newmark's influence chart. 6.0 m 1.0 m 4.0 m A 1.0 m