Pile arranging method for side slope micro anti-skid pile group, and antiskid stability evaluation

Abstract

The invention relates to a pile arranging method for side slope micro anti-skid pile group. Concretely, three or more micro piles are orderly nailed into soil in the same pile position; the micro pile later nailed is tangent to the side surface of the micro pile previously nailed; the micro pile finally nailed is also tangent to the side surface of the micro pile firstly nailed; a crown beam is arranged to hoop all the nailed micro piles into an integral body; and the micro pile is a pile with the pile diameter of 70 to 400mm. The invention further relates to an antiskid stability evaluation method for the side slope micro antiskid pile group. The evaluation method comprises steps of first, determining side slope soil layer physical and mechanical parameters, second, determining antiskid pile designing parameters and analyzing stress, third, determining a micro antiskid pile group arranging method, fourth, determining micro antiskid pile group equivalent modulus, fifth, determining micro antiskid pile group equivalent rigidity, sixth, determining micro antiskid pile group internal force critical designing parameters, and seventh, evaluating the micro antiskid pile group pile body antiskid stability.

Description

technical field [0001] The invention belongs to the technical field of landslide prevention, and in particular relates to a method for arranging miniature anti-slide group piles on a slope, a corresponding method for determining internal force of equivalent stiffness, and evaluation of anti-slide stability. Background technique [0002] With the rapid development of economic construction and the increasing demand for social life, more and more large-scale facilities such as water conservancy projects, municipal projects, roads, and bridges need to be built. The stability prevention and control of a large number of slope engineering has become a concern in the field of engineering construction. Focus. Correspondingly, landslide control technology measures have also been developed rapidly, and more control technologies and measures have played an important role in the field of landslide control. Among them, anti-slide piles, as one of the important landslide control technical...

AI Technical Summary

Problems solved by technology

However, in the practice of landslide engineering treatment, anti-slide piles have great limitations:

[0004] ① In the complex construction environment and conditions, the construction operation area is narrow and the landslide control area is difficult for large-scale construction machinery to operate, which greatly affects and limits the construction of anti-slide piles;

[0005] ②In order to ensure that the anti-slide pile has sufficient strength, stiffness and stability to meet the load-bearing requirements, the section size of the pile body is often large, resulting in high cost and uneconomical treatment engineering, which often makes it difficult to implement landslide treatment projects;

[0006] ③Under the existing construction technology, whether it is digging holes for grouting or prefabricated pile sinking, it will cause strong disturbance to the soil, and even induce slope instability and accelerate the occurrence of landslide disasters

However, due to the short application time of micro piles in slope anti-slide practice, there are many problems in actual engineering: for example, the mechanism of action of micro anti-slide piles is not yet clear, and a relatively mature design calculation theory has not been formed.

These problems restrict the further development of this anti-skid structure to a certain extent.

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