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A detection method realized by a concrete freezing deformation detection device

A detection device and detection method technology, which is applied in the direction of measuring device, electromagnetic measuring device, electric/magnetic solid deformation measurement, etc., can solve the problems of difficulty in ensuring the quality control of concrete winter construction, obtaining concrete deformation, and uneven temperature distribution. , to achieve accurate and reliable test results, avoid inaccurate test results, and avoid waste

Active Publication Date: 2021-12-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a detection method realized by a concrete frost deformation detection device, to solve the difficulty in ensuring the quality control of concrete winter construction due to the difficulty, low efficiency, and poor accuracy of concrete frost heave deformation monitoring at present, and to avoid It is difficult to accurately obtain the deformation of concrete under negative temperature when the unevenness of temperature distribution occurs

Method used

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  • A detection method realized by a concrete freezing deformation detection device
  • A detection method realized by a concrete freezing deformation detection device

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specific Embodiment approach 1

[0034] Specific implementation mode one: combine figure 1 with figure 2 Describe this embodiment, this embodiment includes a container 1, a top cover 2, an elastic bag 3, a sleeve 4, a flexible bellows 5, a metal plate 6, an upper cover 7 and a displacement sensor 8, and the upper end of the container 1 is open end, the top cover 2 is detachably connected to the open end of the container 1, the sleeve 4 is arranged on the top cover 2, the lower end of the sleeve 4 communicates with the inside of the container 1, and the upper end of the sleeve 4 is detachably connected with an upper The cover 7 and the flexible bellows 5 are arranged in the casing 4, the upper end of the flexible bellows 5 is fixedly installed on the upper cover 7, the lower end of the flexible bellows 5 is fixedly connected with the metal disc 6, and the displacement sensor 8 is installed through the upper cover 7 In the flexible bellows 5, the probe of the displacement sensor 8 is in clearance fit with the...

specific Embodiment approach 2

[0042] Embodiment 2: This embodiment is a further limitation of Embodiment 1. The refrigerant 11 is provided with a first temperature sensor 9-1, and the probe of the first temperature sensor 9-1 is installed through the upper cover 7 or the upper cover 2. In the freezing liquid 11, the concrete 10 is equipped with a second temperature sensor 9-2, and the probe of the second temperature sensor 9-2 first passes through the upper cover 7 or the top cover 2 to reach the freezing liquid 11, and then passes through the elastic bag 3 set in concrete 10. Both the first temperature sensor 9-1 and the second temperature sensor 9-2 are existing products, and the working process is the same as that of the existing temperature sensors. The first temperature sensor 9-1 and the second temperature sensor 9-2 are used to monitor the temperature changes in the freezing liquid 11 and the concrete 10 respectively. The best setting position of the probe of the first temperature sensor 9 - 1 is a...

specific Embodiment approach 3

[0043] Embodiment 3: This embodiment is a further limitation of Embodiment 1 or Embodiment 2. The upper cover 7 is screwed to the upper end of the casing 4 . This connection method is the best connection method obtained through sample tests. The connection is fast, the positioning is stable, and it can also realize the process of gradually compressing the cooling liquid 11, which is beneficial to the connection between the container 1 and the elastic bag 3 and between the sleeve 4 and the flexible tube. The bellows 5 are in a vacuum state with only the cooling liquid 11, which is beneficial to improve the accuracy of the detection results of the present invention.

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Abstract

A detection method realized by a concrete freezing deformation detection device. At present, the monitoring of frost heave deformation of concrete is difficult, low in efficiency and poor in accuracy, which leads to the difficulty of guaranteeing the quality control of concrete winter construction. In the device of the present invention, the flexible bellows is arranged in the casing, the upper end of the flexible bellows is fixed on the upper cover, the lower end of the flexible bellows is provided with a metal plate, and the displacement sensor passes through the upper cover and is arranged in the flexible bellows. The probe is matched with the metal disk, the container is provided with an elastic capsule, the elastic capsule is provided with concrete, and the container is filled with refrigerant; the method of the present invention is to measure the displacement of the metal disk through a displacement sensor, thereby obtaining the length deformation of the flexible bellows The process of measuring the maximum frost heave of concrete is obtained by detecting the length deformation of the flexible bellows, and finally realizes the process of quantitatively evaluating the degree of frost heave deformation of concrete in different temperature ranges. The invention is used for detecting the frozen deformation of concrete.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a detection method realized by a concrete freezing deformation detection device. Background technique [0002] Due to changes in the internal components of concrete and the external environment, different concretes will produce their own volume deformation. At room temperature, all concrete undergoes a micro-expansion, settlement stage in the plastic state, and then a dry shrinkage stage in the hardened state. However, concrete is a temperature sensitive material and is most susceptible to freeze damage during the first few hours or days after pouring. Winter construction of concrete in cold regions faces two contradictory problems: one is to protect the concrete surface from drying due to the high evaporation rate in winter; The climatic conditions lead to concrete freezing damage. Understanding the nature and reasons of these volume changes will help us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38G01B7/16G01B7/02
CPCG01N33/383G01B7/02G01B7/16
Inventor 杨英姿陈智韬高金麟张歌付士雪
Owner HARBIN INST OF TECH