Three-dimensional comprehensive slab warping shape monitoring device and implementation method for early cement pavement

A technology of cement pavement and warped shape, which is applied to measuring devices, instruments, and the use of ultrasonic/sonic/infrasonic waves, etc. It can solve the problems of low precision, susceptibility to disturbance, and sensor susceptibility to disturbance, achieving high precision and good stability , ingeniously designed effects

Active Publication Date: 2020-05-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, instruments such as dial indicators, deflection gauges, and LVDT displacement sensors need to wait for the concrete to harden to start measuring, and are installed on the surface of the panel. The displacement monitoring process is easily disturbed. Cumulative deformation is difficult. Although the surface profile meter can reflect the relative warping of the panel, it also requires monitoring after the concrete of the concrete panel hardens. Therefore, the sensor in the traditional monitoring method is easily disturbed, has low precision and poor stability, and cannot monitor the cumulative deformation. Real-time monitoring of concrete panel warping shape

Method used

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  • Three-dimensional comprehensive slab warping shape monitoring device and implementation method for early cement pavement
  • Three-dimensional comprehensive slab warping shape monitoring device and implementation method for early cement pavement
  • Three-dimensional comprehensive slab warping shape monitoring device and implementation method for early cement pavement

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Embodiment 1

[0018] Embodiment 1: as Figure 1~2 As shown, in this embodiment, a device for monitoring the warpage shape of three-dimensional full-scale slabs in the early age of cement pavement is provided, including a concrete panel 100, a water-stabilizing base 200 is arranged under the concrete panel, and a water-stabilizing base 200 is set in the water-stabilizing base 200. There are several cylindrical concrete columns 300 embedded in the upper surface of the water-stabilized base, each cylindrical concrete column is provided with a vibrating wire strain sensor extending from the inside of the cylindrical concrete column to the concrete panel, and the water-stabilized base and the concrete panel An isolation film 400 is provided between the cylindrical concrete columns and the water-stabilized base to prevent the vertical deformation of the concrete panels;

[0019] The concrete panel is provided with 13 measuring points, and each measuring point is provided with a vibrating wire str...

Embodiment 2

[0026] Embodiment 2: On the basis of Embodiment 1, in this embodiment, the gauge length of the vibrating wire strain sensor is 150 mm, the strain range is ±2500 με, and the accuracy is ±1 με, with high precision and wide application range; When the type strain sensor measures the displacement, the displacement is the product of the chord length of the strain gauge and the strain.

[0027] In this embodiment, 13 cylindrical concrete columns 300 are prefabricated first, 1 / 2 of the vertical length of the vibrating wire strain sensor is pre-embedded inside the prefabricated cylindrical concrete column, and then excavated on the water-stabilized base as required 13 slots for placing cylindrical concrete columns, the depth of the slots is consistent with the height of the cylindrical concrete columns, the cylindrical concrete columns are placed in the slots 210, the bottom of the cylindrical concrete columns and the bottom of the slots are made of epoxy resin Fixed to ensure firmnes...

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Abstract

The invention provides a concrete pavement early-age three-dimensional comprehensive slab warping shape monitoring device and a realization method thereof. The monitoring device comprises a concrete face slab. A cement stabilized base is arranged under the concrete face slab. The cement stabilized base is internally provided with a plurality of cylindrical concrete columns embedded in the upper surface of the cement stabilized base. Each cylindrical concrete column is internally provided with a vibrating-string strain sensor extending from the inside of the cylindrical concrete column to the concrete face slab. An isolation film for preventing vertical deformation of the cylindrical concrete columns and the cement stabilized base is arranged between the cement stabilized base and the concrete face slab. The concrete face slab is provided with 13 measuring points. Each measuring point is provided with a vibrating-string strain sensor. The monitoring device has simple structure, ingenious design, good stability and high precision.

Description

technical field [0001] The invention relates to a three-dimensional full-slab warping shape monitoring device and a realization method for early-age cement pavement. Background technique [0002] Warpage is a typical shape characteristic of cement concrete pavement slabs, which significantly affects the support state of the pavement slab and the stress distribution generated by vehicle loads inside the slab. The study found that the pavement will solidify a specific initial warping shape due to the combined effects of specific construction temperature field, dry shrinkage, and creep in the early age. It has a significant impact, and even causes premature breakage of the panel. [0003] At present, the main technical problem faced by the early-age warpage monitoring of concrete slabs is the overall monitoring of the early-age full-time warpage of large-area thin-slab structures. In the past, dial gauges, deflection gauges, displacement sensors, and surface profilers were us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B17/04G01B17/06
CPCG01B17/04G01B17/06
Inventor 王丽娟胡昌斌曾宇鑫孙增华唐晶晶
Owner FUZHOU UNIV
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