Research Of Experiment About Mechanics Of Soil Anchor Subjecting To Force On The Spot

With the development of urban construction, the soil anchor bolting technique more and more applications in deep foundation pit slope support. How to resolve the deep foundation pit slope support problem safety and economical ly is a rock soil-engineering topic that has the biggest realistic meaning. The anchor bolting process is a dynamic state to be forced, and it' s influencing factor is numerous, because of forced mechanism do not understand very much, as well as calculate and design theory still do not perfect, cause appearance a lot of project accidents or cause economic waste. Therefore, understanding the forced mechanism of soil anchor bolting to design competence, reduce project accident and reduce project cost has directive significance at present.Through the spot test, the paper studies the forced mechanism of soil anchor bolting and lateral displacement of the foundation pit. Two researches are tested at the spot test: the first, on the anchor glue resistance strainslice to measure strain of anchor, and then convert into the axle strength of the anchor. The second, at a distance of pit side line 0.5m, 2.5m, 3.5m, drill three inclinometer hole, cover up the inclinometer tube and use the borehole inclinometer to measure lateral displacement of the foundation pit. Through finding, the anchor bolting process is a dynamic state to be forced, and got the variety law of anchor be forced and lateral displacement of the foundation pit. The soil anchor is along receiving the strength characteristic of total length through an analysis of test data, the relation with the foundation pit lateral displacement take place toward free face and construction changing. Thus set up rational mechanics calculating model, forced mechanism of soil anchor bolting and foundation pit lateral displacement computing technology, so the design method of the anchor has further improved. Adopt software ANSYS of finite element at the same time, set up and test the actual project model, have made it with the conclusion with identical on-the-spot result of the test.Results of the spot testing and ANSYS simulation indicate, the soi I anchor forced and foundation pit lateral displacement has a laws that varying with dynamic construction process.