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A Method of Using Cable Heating and Optical Fiber Temperature Measurement to Comprehensively Detect the Quality of Grouting after Pile Foundation

An optical fiber temperature measurement and comprehensive detection technology, which is applied in the testing of infrastructure, infrastructure engineering, construction, etc., can solve the problem of difficulty in judging the quality of grouting construction, and achieve the effect of improving detection efficiency.

Active Publication Date: 2018-11-13
ZHEJIANG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect that it is difficult to judge the quality of post-pile grouting construction in the existing pile foundation, the present invention provides a method for comprehensively detecting the post-pile grouting quality by using cable heating and optical fiber temperature measurement

Method used

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  • A Method of Using Cable Heating and Optical Fiber Temperature Measurement to Comprehensively Detect the Quality of Grouting after Pile Foundation
  • A Method of Using Cable Heating and Optical Fiber Temperature Measurement to Comprehensively Detect the Quality of Grouting after Pile Foundation
  • A Method of Using Cable Heating and Optical Fiber Temperature Measurement to Comprehensively Detect the Quality of Grouting after Pile Foundation

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Embodiment Construction

[0034] refer to Figure 1a to Figure 7 , a method for comprehensively detecting the quality of grouting after pile foundation by using cable heating and optical fiber temperature measurement, including the following steps:

[0035] (1), installation of heating cable and sensing optical fiber combination device: multiple heating cables with hydraulic cylinders or pneumatic cylinders 2 and sensing fiber combination device 1 are fixed on the main rib 51 of the steel cage, and the heating cable and sensor Sensing optical fiber combination device 1 is fixedly connected with the piston rod 21 of hydraulic cylinder or pneumatic cylinder 2, and the acquisition signal input end of external acquisition instrument 7 is connected with the output end of heating cable and sensing optical fiber combination device 1; The sensing optical fiber combination device 1 is arranged in a U-shaped structure, and is arranged from the bottom of the steel cage upwards; the measuring cable, hydraulic pipe...

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Abstract

The invention provides a method for comprehensively detecting the pile foundation post-grouting quality through cable heating and fiber temperature detection. The method comprises the following steps that (1) heating cable and sensor fiber combination devices are mounted, specifically, the multiple heating cable and sensor fiber combination devices with hydraulic cylinders or pneumatic cylinders are fixed to main reinforcements of a reinforcement cage in a U-shaped structure and arranged upwards from the bottom of the reinforcement cage in a full length mode; (2) the reinforcement cage is mounted; (3) the heating cable and sensor fiber combination devices are pushed out; (4) concrete is poured into pile holes of cast-in-place piles; (5) before grouting, the cable heating temperature is controlled and temperature changes in the laying direction are recorded through sensor fibers; (6) grouting is carried out; and (7) the temperature value of a full-depth soil body in the laying direction is read after completion of grouting. Through comparison of temperature values obtained before and after grouting, the distribution states of grout in the pile side soil body can be obtained.

Description

technical field [0001] The invention relates to a method for comprehensively detecting the post-grouting quality of pile foundations by using cable heating and optical fiber temperature measurement, which belongs to the field of bridge pile foundation detection, and specifically relates to pile foundation engineering after the post-pile grouting technology is implemented. It is a method to evaluate the grouting effect of the comprehensive technology of heating and distributed optical fiber temperature measurement. Background technique [0002] The post-pile grouting technology can effectively reduce the pile length and improve the bearing capacity of cast-in-situ piles by injecting grout that can cement and solidify the pile tip and pile side soil to strengthen and solidify the pile tip and pile side soil. It has the advantages of reducing pile settlement, shortening the construction period, and reducing the engineering cost of cast-in-situ piles. The post-pile grouting tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 卢彭真
Owner ZHEJIANG UNIV OF TECH
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