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A method for testing the vertical structural load of existing buildings by intercepting concrete structure specimens

A technology of existing buildings and vertical structures, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of lack of detection technology, and achieve the results of strong reliability, good use value, and less destructive effects

Active Publication Date: 2022-01-25
江苏东南特种技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the technology for detecting the vertical load of existing buildings is relatively lacking, so an effective method for detecting the vertical structure load of existing buildings is urgently needed to assist in the reinforcement of existing building structures

Method used

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  • A method for testing the vertical structural load of existing buildings by intercepting concrete structure specimens
  • A method for testing the vertical structural load of existing buildings by intercepting concrete structure specimens

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment is to detect the vertical load carried by a frame column structure of an existing building. The frame column structure has a cross-sectional size of 300mm×300mm, and its design strength is constructed with C40 concrete.

[0035] The specific detection steps are as follows:

[0036] 1) Install the strain gauge: Determine the position, shape and size of the intercepted concrete structure test piece on one side of the existing building load-bearing frame column structure to be tested. In this embodiment, the shape of the intercepted concrete structure test piece is selected as a rectangle. In other embodiments, the shape of the test piece can also be a circle or other shapes. The intercepted test piece requires not only little damage to the building structure, but also It is conducive to the release of vertical load force and makes the measured load more accurate. The height of the intercepted concrete structure test piece should not be too large, and it s...

Embodiment 2

[0045] This embodiment is to provide important data support for the pile foundation correction and reinforcement project of an existing high-rise building (34 floors, with a total height of 100 meters) in Nanjing. Due to construction quality problems, the bearing capacity of the pile foundation of the existing high-rise building is insufficient, resulting in a large settlement of the foundation. When the main structure is capped, the average settlement of the building reaches 221mm, and the settlement is uneven. It reached 4.3 / 1000, and the sedimentation rate was 0.35mm / d, which exceeded the standard stipulated by the state. It is required to reinforce the foundation with supplementary piles, and to correct the deviation of the building by cutting piles and forcing down. The original design pile type is prestressed high-strength concrete pipe pile, pipe pile model PHC-600(130)AB-C80, single pile design characteristic value is 2700KN limit value is 5400KN. Due to the large pil...

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Abstract

The invention discloses a method for detecting the vertical structure load of an existing building by intercepting a concrete structure test piece. The longitudinal strain can be used to calculate the vertical load carried by the vertical structure of the building. The invention intercepts the concrete structure test piece from the side of the vertical structure of the existing building, measures the strain of the concrete structure test piece in the vertical direction through the vibrating wire strain gauge, and calculates the existing building structure through the elastic modulus formula The vertical load is less destructive to the building structure, and it is easy to implement, the result is reliable, and it has good use value in the engineering field. At the same time, the invention provides important data support for building reinforcement design, especially plays an extremely important role in building pile foundation deviation correction and reinforcement engineering.

Description

technical field [0001] The invention relates to a method for detecting the vertical structure load of an existing building by intercepting a concrete structure test piece. Background technique [0002] With the development of the economy and the expansion of the population, land resources are increasingly scarce. In order to meet the needs of people's economic activities and living, more and more high-rise buildings have been erected. In theory, the vertical structure of a high-rise building bears its vertical load evenly, and the magnitude of the load can be known through calculation; however, in practice, it is often caused by factors such as uneven settlement of the foundation of the building. The tilt of the building caused the redistribution of the vertical load of the building structure, and the vertical load of each vertical load-bearing structure changed greatly. [0003] In order to ensure the structural safety of the building, it is necessary to reinforce and rect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00G01B17/04
CPCG01N3/00G01B17/04G01N2203/0075G01N2203/0658G01N2203/0682G01N2203/0676
Inventor 李今保李碧卿姜涛淳庆李欣瞳李书辉李龙卿
Owner 江苏东南特种技术工程有限公司
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