Prestressed Anchor Flexible Support Technology And Its Application

Prestressed anchor flexible support technology and its application

Deep foundation pit support technology has always been a popular and difficult point of concern in the academic and engineering circles. The traditional deep foundation pit support technology into a hole is similarly difficult, the construction speed is proportionally slow; large lifting equipment occupies a lot of space.

Possesses the following obvious advantages:

This technology is practical for deep foundation pit projects in hard clay soil, soft rock, weathered rock and other geological conditions.

(1) Dangerous: the mechanical properties of foundation pit rock and soil, surrounding load, construction environment and underground pipeline network equipment its complex;

(2) Seeking new technology for deep foundation pit support in soft rock areas is an urgent need for the establishment of the project! Thus, the pit support situation in different geotechnical regions is different.

The right spiral equal strength threaded anchor flexible support foundation pit project according to the technology is important to cause:

1, pre-stressing anchor 2, anchor bearing structure 3, radiating concrete surface layer 4, drainage system pre-stressing anchor flexible support method of the basic cause of the technical mechanism is: all of the system anchors to apply pre-stressing, through the process of the anchor bearing structure and surface layer in the pit sidewalls caused by the strong pressure field, to realize the automatic restraint, reduce pit deformation, improve the stability of the pit group. The use of large quantities of steel and concrete, than the traditional support technology to save engineering cost of about 60 ~ 70.

(1) Long construction period; (2) High cost; (3) Not practical for soft rock strata.

Traditional deep foundation pit support technology for:

Aiming at the shortcomings of long construction period, high cost and difficult construction of traditional deep foundation pit support technology (pile support and underground continuous wall support) under soft rock geological conditions, pre-stressed anchor flexible support technology is proposed at home and abroad.

This technology can support while excavating, so that the earth excavation and foundation pit support synchronization stop, compared with the traditional support technology, the construction period can be contracted by about 50.