Strain monitoring method of cast-in-situ x-shaped concrete pile based on fbg sensor

A concrete pile and strain monitoring technology, which is applied in the test of foundation structure, foundation structure engineering, construction, etc., can solve the problem of inability to collect continuous strain data of the pile body, complicated installation and layout of strain gauges, and many lead-out lines of strain gauges, etc. problem, to achieve the effect of convenient and fast recording and saving data, no electric breakdown and burning, and simple wiring
CN103774702BActive Publication Date: 2015-11-18HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2015-11-18

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Abstract

The invention discloses a cast-in-place X-type concrete pile body strain monitoring method based on an FBG (Fiber Bragg Grating) sensor. The cast-in-place X-type concrete pile body strain monitoring method comprises the following steps: flattening the surface of an X-type concrete pile body; axially paving four optical fibers at convex and concave positions on the surface of the processed pile body; adhering the FBG sensor serially connected with the optical fibers on the surface of the pile body; coating epoxy resin; accessing to a fiber bragg grating interrogator and measuring a strain value of the pile body. According to the monitoring method provided by the invention, the survival rate of the optical fiber sensor is improved; the electromagnetic interference can be avoided; the cast-in-place X-type concrete pile body strain monitoring method has the advantages of good waterproof property, high testing precision, good stability and the like.
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Description

technical field

[0001] The invention relates to a test method of a foundation structure, in particular to a strain monitoring method of an in-situ X-shaped concrete pile body based on an FBG sensor. Background technique

[0002] The cast-in-place X-shaped concrete pile uses a letter X-shaped section instead of the traditional circular section. Compared with the traditional round pile with the same cross-sectional area, the cross-sectional circumference of the cast-in-place X-shaped concrete pile is significantly increased, and the unit material The specific surface area is also significantly increased, thereby achieving the purpose of saving pile body materials and improving the bearing capacity of material per unit volume. Therefore, the single pile bearing capacity can be greatly improved without increasing the amount of concrete poured, thereby improving the cost performance. It can be widely used in foundation engineering in the fields of expressway, high-speed railway,...

Claims

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