Patent AU-2021105487-A4 (AU)
Title: Novel Granular piles installation process in soft clays with the calculation using design Charts
Inventor: GUPTA POOJA
IPC: E02D3/08
Filed: 2021-08-13
Granted: 2021-12-02
Abstract: NOVEL GRANULAR PILES INSTALLATION PROCESS IN SOFT CLAYS WITH THE 
CALCULATION USING DESIGN CHARTS 
Data selection for chart calculation where Un - drained compressive strength (cu) ranges about 7 
to 50 kPa, and this undisturbed un-drained shear strength is assumed to be the same as the un
drained shear strength of soil, thus values of cu can be 10 to 50 kPa. Using the five cu values of 
10, 20, 30, 40, and 0 (kPa). Soil bulk density () is estimated to be 20 kN/m3. Angle of view inbuilt 
resistance throughout Granular Pile particles (c) is determined by surface features, expressiveness, 
and density. The use of a big loading frame or a scientific concentration - dependent can be used 
to identify granular pile composition. As per the code suggestion to the regulation, the angle of 
internal friction might range from 38 to 42 degrees. 38o, 39o, 40o, 41o, and 42o were chosen as 
the five c value. The diameter range used in this study was 0.3m to 1.05m, allowing for a wide 
variety of variations to be investigated. The sizes specified are 0.3, 0.45, 0.60, 0.75, 0.9, and 1.05 
inches (m). In general, pile spacing can range from 2D to 3.5D. The pile frequency used in this 
study is 2, 2.5, 3, and 3.5 times D. Because the triangular layout is superior to the square, it is used.  
A Granular Pile helps us to enhance is made up of a large number of piles that are erected in a 
regular configuration, and a crushed stone mattress is normally placed on top of the Granular Pile 
bearing capacity. Apart for those on the borders of the loading areas, the behaviour of all pile soil 
units in the foundation may be regarded as the same. Then there's only one pile earth entity, which 
involves specific pile acting within a cylindrical specimen cell. Having a diameter of influence 
represented by De, The dimension of the Granular Pile, the spacing between Granular Piles, as 
well as the angle of internal friction of the Granular Pile material must all be finalised before the 
design of Granular Piles can begin. The data required are the soft soil's un-drained shear strength 
(cu) and unit weight (). Compute the appropriate compressive force for spontaneous rough clay 
9
with a safety factor of 2.5 and a bearing installed capacity of 5.14 (qsafe = 2.056 cu). Calculate the 
bearing force that the object exerts on the soft soil. To commence, one variable, the distance 
adjacent Granular Piles, is determined. Used this supplied un-drained shear strength of the soft 
soil, select the chart (suitable graph as mentioned above). The enhanced support for the contention 
after applying Granular Pile of a specific diameter and angle of internal friction of Granular Pile 
compound is shown in the chart. The dimension of the Granular Pile and thus the internal friction 
angle of the Granular Pile substance are determined for the desired load capacity. Because the 
design charts are for un-drained shear strength of soft soil (cu) in both 10 and 50 kN/m2 for 
cohesive soil, angle of internal friction of Granular Pile material (c) between 380 and 42, and 
diameter of Granular Pile (D) 0.3 m to 1.05 m, linear interpolation for a specific centre located 
with system performance among Granular Piles is required.  
10
40 
00* 0.5 30 1.5 2-0 
4500 
A9 9 
'4S 50 L 0m 
300 
2540 
20 
05 10 IS 20 
Figure No.1I