## 4 Results and Discussion
### Group Pile Lateral Load Capacity
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{4}{c}{**Lateral Resistance**} & \multicolumn{4}{c}{**The Difference of Lateral Resistance with**} \\  & \multicolumn{4}{c}{**(kN)**} & \multicolumn{4}{c}{**the Single Pile (\%)**} \\ \hline  &
\begin{tabular}{c} **Single** \\ **Pile** \\ \end{tabular} & **1 st Row** & **2 nd Row** & **3 rd Row** & **4 th Row** & **1 st Row** & **2 nd Row** & **3 rd Row** & **4 th Row** \\ \hline  & \multicolumn{4}{c}{**Combination Lateral Loads Effect**} & \\ P\({}_{\text{S1}}\), P\({}_{\text{G1}}\) & 304.663 & 541.442 & 299.494 & 255.588 & 149.534 & 43.731 & 1.697 & 16.108 & 50.918 \\ P\({}_{\text{S2}}\), P\({}_{\text{G2}}\) & 414.567 & 711.253 & 389.264 & 333.519 & 197.712 & 41.713 & 6.103 & 19.550 & 52.309 \\ P\({}_{\text{S3}}\), P\({}_{\text{G3}}\) & 524.270 & 861.389 & 488.142 & 415.128 & 248.422 & 39.137 & 6.891 & 20.818 & 52.616 \\  & \multicolumn{4}{c}{**Pile Stiffness Effect**} & \\ E\({}_{\text{p1}}\) & 524.270 & 861.389 & 488.142 & 415.128 & 248.422 & 39.137 & 6.891 & 20.818 & 52.616 \\ E\({}_{\text{p2}}\) & 525.274 & 875.012 & 500.002 & 427.055 & 252.604 & 39.970 & 4.811 & 18.699 & 51.910 \\ E\({}_{\text{p3}}\) & 526.043 & 885.202 & 509.006 & 436.031 & 255.516 & 40.574 & 3.239 & 17.111 & 51.427 \\  & \multicolumn{4}{c}{**Soil Stiffness Effect**} & \\ E\({}_{\text{s1}}\) & 524.270 & 861.389 & 488.142 & 415.128 & 248.422 & 39.137 & 6.891 & 20.818 & 52.616 \\ E\({}_{\text{s2}}\) & 522.476 & 837.790 & 465.483 & 391.661 & 242.058 & 37.636 & 10.908 & 25.038 & 53.671 \\ E\({}_{\text{s3}}\) & 520.390 & 812.899 & 443.048 & 367.568 & 237.664 & 35.983 & 14.862 & 29.367 & 54.333 \\ \hline  & \multicolumn{4}{c}{Note: P\({}_{\text{S1}}\), P\({}_{\text{C1}}\) = 542.453 kN, 7051.887 kN; P\({}_{\text{S2}}\), P\({}_{\text{G2}}\) = 690.240 kN, 8973.120 kN; P\({}_{\text{S3}}\), P\({}_{\text{G3}}\) = 822.309 kN, 10,690.011 kN.} \\  & \multicolumn{4}{c}{E\({}_{\text{p1}}\) = 20.75 MPa; E\({}_{\text{s2}}\) = 29.05 MPa; E\({}_{\text{s3}}\) = 37.35 MPa. E\({}_{\text{s1}}\) = [PERSON] et al. [23]; E\({}_{\text{s2}}\) = [PERSON] and [PERSON] in Hammam and Eliwa [22]; E\({}_{\text{s3}}\) = [PERSON] and [PERSON] [24].} \\ \end{tabular}
\end{table} 
Table 5: The difference of lateral resistance with the single pile. Figure 12: Pile configuration, (**a**) pile configuration, (**b**) deflection surface, (**c**) overlapping of failure zones. Based on these observations, the location of the first row of piles that receive the most excellent lateral resistance up to the fourth row is different from the research in general conducted by some researchers [5; 35]. In this case, the first to the fourth row of piles are those on the horizontal longitude, whereas in research with symmetrical pile configurations, the first row is on the vertical longitude (the farthest pile from the loading point has the greatest value, based on the theory by [PERSON] [34]). In that sense, the pile furthest from the loading point (piles number 5, 9, and 13) should be the first-row pile with the greatest lateral resistance, and the lateral resistance decreases until piles number 6 and 10 (Figure 12a). However, the results of this study with asymmetrical pile caps indicate that piles 1 and 2 have the greatest lateral resistance and the second-row until fourth-row piles have a lower lateral resistance (Figure 12a). This can also be seen from the color of the deflection on the pile surface (Figure 12b), indicating that the most considerable deflection value (red color) occurs at piles 1 and 2 in the first row and decreases until the fourth row. In addition, the most considerable deflection occurs on the inclined side of the pile cap. This shows that the side slope of the pile cap can increase the shear zone and thus increase the overlap between piles and lateral resistance so that piles number 1 and 2 only experience edge effects (Figure 12c), and the greatest lateral resistance occurs in the pile opposite to the direction of loading or occurs in the horizontal longitude row of the pile.