Chongqing Jiangbei City Station Deep Foundation Backfill Mechanism Of Prestressed Anchor And Applied Research

Prestressed anchor,as a flexible reinforcement measures,can make the internalreinforce of the rock. After decades of development, it plays a very good supporting rolein the slope, excavation, retaining walls and other engineering structures. Prestressedanchor used in combination with anti-slide pile (commonly known as "anchor piles")and looser rock formations, often can play a good role in supporting the initiative ofsome deep pit. However, due to the current high use of backfill excavation in anchordesign is often based on experience, the lack of a theoretical basis. Therefore, it isnecessary to study its mechanical characteristics of the construction.Since Chongqing Territory rapid economic development, all kinds of traffic, a lot ofthe construction of municipal works came out. Chongqing mountainous, limestoneaddress characteristics determine that there is a lot of excavation, embankment,especially in high backfill deep excavation, backfill influence often can not be ignored.When using prestressed anchor support for excavation carried out in the presence ofbackfill existing research aspects of the mechanical characteristics of the anchor still didnot much attention. When to take a different perspective on the high anchor anchoreddeep excavation backfill reinforcement, as well as the presence of the pit shaft withshaft of force between states pulled anchor and intermediate finite earth pressure stateare worth study.In this thesis, Chongqing Metro Line6for the calculation template, consider thecase where the backfill exist. Combined with design data, using three-dimensional solidmodeling of the entire ANSYS to simulate the process of excavation, conductedresearch on several big issues①for the case of high backfill take a different angle condition of prestressed anchorcable anchor, the anchor during excavation and stress-strain characteristics of thesurrounding soil, pile, the bottom of the pit to produce any uplift Effect of differenttypes, to be able to determine the optimal angle of the anchor. For the construction,design reference.②in the case of the presence of the shaft, between the shaft and the pit is set to pullthe anchor on which to pull the anchor in the middle section of the mechanicalcharacteristics as well as a simple finite state earth pressure simulation of its stress-strain generated affect the surrounding soil stabilizing piles of research.Theoretical construction to provide security for the guarantee.