1. Three point loads, 19000, 20000 and 18000kN, act in line 8 m, 6m apart near the surfaceof a soil mass. Calculate the vertical stress at a depth of 4m vertically below the center (30000kN)load.19 000 KN20 000 kN18 000 KNInfluence factors for vertical stress due to point load↳rizbriz1₂0.4780.800.1390.0200.4660.900.1080.0160.4331.000.0840.0134 m0.3851.100.0660.0110.3291.200.0510.0090.2731.300.0400.0060.2211.400.0320.0040.1761.500.0250.0038 m6mriz0.000.100.200.300.400.500.600.701.601.701.801.902.002.202.402.60

Given three point loads that are 8m and 6m apart near the surface of soil mass. It is required to…

Answered: . Three point loads, 19000, 20000 and…

. Three point loads, 19000, 20000 and 18000kN, act in line 8 m, 6m apart near the surface of a soil mass. Calculate the vertical stress at a depth of 4m vertically below the center (30000kN) load.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

Question

1. Three point loads, 19000, 20000 and 18000kN, act in line 8 m, 6m apart near the surface
of a soil mass. Calculate the vertical stress at a depth of 4m vertically below the center (30000kN)
load.
19 000 KN
20 000 kN
18 000 KN
Influence factors for vertical stress due to point load
↳
riz
b
riz
1₂
0.478
0.80
0.139
0.020
0.466
0.90
0.108
0.016
0.433
1.00
0.084
0.013
4 m
0.385
1.10
0.066
0.011
0.329
1.20
0.051
0.009
0.273
1.30
0.040
0.006
0.221
1.40
0.032
0.004
0.176
1.50
0.025
0.003
8 m
6m
riz
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
1.60
1.70
1.80
1.90
2.00
2.20
2.40
2.60

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