Shear Test Lab Report

Project Title: Effect of sand columns induced in silt soil tested through direct shear test

Sr. No. Name of the Students Roll No. Signature

Grade Sr. No. Name of the Project Supervisor/Joint Supervisors Designation of The Supervisor

1 Rahul Siddarth 2K13/GTE/13 1

2

2

3

Certificate Project work qualifies for submission

4

Approval of the Supervisor Approved/Rejected/Needs Revision

5 Signature of the Supervisor/s

Department of Civil Engineering, Delhi Technological University, Delhi, India

ABSTRACT

The report presented is an attempt made to analyze the effect of sand columns of varying diameter on the cohesion strength and angle of internal friction of soil tested through direct shear stress.

Key words

Effect,

Thus, c=8.05 KN/m2 and ɸ= tan-1(0.53) =29.4o

MODIFIED PROCTOR TEST

The maximum dry unit weight of the soil corresponding to the optimum moisture content is obtained through the modified proctor test, in which the sample is placed in five layers and each layer is compacted by giving 56 blows with the drop hammer. The plot is made between the water content and the dry density and the maximum value of the density gives the corresponding value of optimum water content.

Mass of empty mould = 6220 g

Volume of mould = 3092.505 cc

Water content of the sample is given by :

where, M1 = Mass of empty

RESULTS OF DIRECT SHEAR TESTS WHEN SAND COLUMNS WERE INTRODUCED IN THE SOIL:

CASE 1: WHEN 10 MM DIAMETER PILLARS WERE INTRODUCED.

Figure 9: Graph for Normal loading of 50 KN/m2

Figure 10: Graph for Normal loading of 100 KN/m2 Figure 11: Graph for Normal loading of 150 KN/m2

TABLE 9: Result Obtained from Direct Shear Test

Normal load(KN/m2) Shear Stress