Research on the Mechanical Properties of New Double-Row Pile Supporting Structure Based on an In Situ Study

Table 1

Geometric design parameters of test piles.

Test pile type	Crown beam size (m)	Length of front and rear row pile (m)	Pile diameter (m)	Row spacing (m)	Pile spacing (m)	Depth of foundation pit (m)
Conventional	0.8 × 0.8	12.5/12.5	0.8
Prestressed strong-constrained	0.8 × 0.8	10.0/12.5	0.8	2.4	2.0	8
Recycling assembled	—	12.5/12.5	0.8/0.6