Inbuilt method for distributed type sensing cable in foundation pile

Abstract

The invention relates to an inbuilt method for a distributed type sensing cable in a foundation pile. The invention aims at providing the inbuilt method for the distributed type sensing cable in the foundation pile to achieve a goal of reducing or avoiding damage to the sensing cable in a foundation pile construction process, thus improving the survival rate of an optic fiber strain sensor. The technical scheme is that for a driven pipe, the inbuilt method includes the steps: 1.1. arranging a group of pre-buried steel pipes on the foundation pile; 1.2. conducting foundation pile driving-in construction; 1.3. bending the sensing cable from the middle of the cable by 180 degrees, and fixing the bent portion on a metal support and conducting smooth transition on the bent portion; 1.4 placing the sensing cable and grouting flexible pipe together in each pre-buried steel pipe after a pilling rest period until the bent portion of the sensing cable extends to the bottom of the pre-buried steel pipe; and 1.5. grouting to the pre-buried steel pipe through the grouting flexible pipe until thick liquid comes out of the opening of the pipe, and completing the burying of the sensing cable after the thick liquid in the pipe is solidified.

Description

technical field [0001] The invention relates to a method for embedding distributed sensing optical cables in foundation piles, which is mainly suitable for pile body strain testing / monitoring of foundation piles such as steel pipe piles, reinforced concrete prefabricated piles and reinforced concrete bored piles. Background technique [0002] Foundation piles are commonly used foundation treatment methods in engineering construction. They are widely used in construction, municipal, highway, railway, water conservancy, hydropower, nuclear power and other fields. The construction quality and performance of foundation piles often pass certain inspections / tests methods and monitoring methods to achieve. Stress or strain sensors (such as steel stress gauges, concrete strain gauges, etc.) need to be buried during detection / testing and monitoring, and the pile body stress, pile side friction resistance, pile tip resistance, pile body compression or tension can be calculated accordi...

AI Technical Summary

Problems solved by technology

However, at present, the pre-embedded type is still used, that is, the distributed strain sensor is bound to the steel cage and placed in the drilled hole before the concrete is poured, or the prefabricated pile (such as reinforced concrete type or various types of steel) is firstly used. The outer surface of the pile) is pasted and buried shallowly, and then driven into the soil. This method also has the problems of easy damage and protection after construction of the prefabricated pile.

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