CN213023145U

CN213023145U - Concrete surface crack propagation monitoring devices that ftractures

Info

Publication number: CN213023145U
Application number: CN202021386682.1U
Authority: CN
Inventors: 袁楷; 徐晓晖; 陈刚; 洪盛桥; 全有维
Original assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Current assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-04-20
Anticipated expiration: 2030-07-15

Abstract

The utility model discloses a concrete surface crack extension monitoring devices, including the aspect ratio is greater than 0.2 cylindricality lime cake, steel strand wires and steel scale, surround the side of lime cake, from top to bottom along the spiral direction set up a set of thimble, the thimble of highest position and the thimble of lowest position are on the same side of lime cake; the steel graduated scale comprises a steel scale surface and an elastic reset pointer, and the distance of the elastic reset pointer moving along the steel scale surface is read through scales on the steel scale surface; one end of the steel strand is fixed on the thimble at the highest position, and the other end of the steel strand sequentially passes through each thimble along the spiral direction, is led out from the thimble at the lowest position, and is finally fixed with the elastic reset pointer; the lime cake is attached to the surface of the concrete and placed on the cracks on the surface of the concrete, and the steel ruler surface is fixed on the surface of the concrete. The scheme can effectively observe the concrete surface crack propagation condition and effectively provide data support for concrete structure cracks; the device simple structure can realize the mass production.

Description

Concrete surface crack propagation monitoring devices that ftractures

Technical Field

The utility model relates to a concrete surface crack fracture extension monitoring devices settles the device around the concrete face microcrack, can carry out the analysis to concrete slab crack width through the monitoring value, can verify security, durability etc. of concrete plate structure.

Background

Along with the higher and higher requirements of China on the management of the construction quality of the building engineering, the construction quality of the building engineering directly influences the functionality of a building and also influences the comfort level of a user, and at the moment, the quality problem also influences the position of a building construction enterprise in the whole field. The control of concrete cracks is one of the current quality core problems of construction engineering, and the cracks can affect the waterproof performance of a structure, the durability and the service life of the structure; therefore, it is very important to analyze the form and width of the concrete cracks and control the crack.

SUMMERY OF THE UTILITY MODEL

The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides an easy operation, simple manufacture, realize mass production's concrete surface crack extension monitoring devices that ftractures can realize the slight fissured measurement of concrete structure floor and record to provide data support for the concrete structure crack.

The technical scheme is as follows: in order to achieve the above object, the utility model adopts the following technical scheme:

in engineering quality accidents, most of the engineering quality accidents begin from the expansion of cracks, a common reinforced concrete structure generally works under stress with cracks, but along with the development and change of the cracks and the uneven change of load, the durability and the applicability of a structural member can be reduced in different degrees, the structural member can be seriously damaged even, and the observation of the change of the width of the cracks is more important. Based on the utility model provides a concrete surface crack extension monitoring devices, including aspect ratio more than 0.2 cylindricality lime cake, steel strand wires and steel scale, encircle the side of lime cake, from top to bottom set up a set of thimble along the spiral direction, the thimble of highest position and the thimble of lowest position are on the same side of lime cake; the steel graduated scale comprises a steel scale surface and an elastic reset pointer, and the distance of the elastic reset pointer moving along the steel scale surface is read through scales on the steel scale surface; one end of the steel strand is fixed on the thimble at the highest position, and the other end of the steel strand sequentially passes through each thimble along the spiral direction, is led out from the thimble at the lowest position, and is finally fixed with the elastic reset pointer; the lime cake is attached to the surface of the concrete and placed on the cracks on the surface of the concrete, and the steel ruler surface is fixed on the surface of the concrete.

The device designs a regular lime cake with a larger height-to-width ratio, and analyzes the deformation of the crack by detecting the deformation of the lime cake; during the use, arrange the lime cake in the crack top that needs detected the deflection, the tip of fixed lime and both sides relatively the crack, when concrete slab under external load effect (when having large-scale mechanical equipment to walk on the peripheral structure roof), because concrete surface crack under the load effect extensional deformation, lead to the expansion of lime cake among the device, under lime cake expansion effect, the steel strand wires expand, drag the pointer displacement on the scale, the reading on the scale just can reflect the width of crack extension this moment, the actual width b of crack extension equals scale reading/steel strand wires number of turns n around the lime cake. The more the steel strand wire around the lime cake turns, the more accurate the numerical value read by the graduated scale. The actual expansion width reading of the crack is read, so that the type of the crack (micro crack and macro crack) is judged, whether the crack is a harmful crack or not is determined, measures are further taken to prevent the crack from appearing and developing, and the safe and stable operation of the structure is ensured.

Preferably, the number of turns of the steel strand wound on the lime cake is more than or equal to 3.

Preferably, the threading rings are all arranged on the side edges of the lime cakes, the included angles of the planes where the threading rings are located and the side surfaces of the two sides of the corresponding side edges of the lime cakes are equal, and the influence of the threading rings on the trend and the length of the steel strand is avoided.

Preferably, the steel strand is led out from the lowest threading ring, and the steel strands on two sides of the lowest threading ring are on the same straight line.

Preferably, the threading ring is of a U-shaped structure, and two legs of the U-shaped structure are prefabricated on the lime cake.

Preferably, fixing holes are formed in two side faces, parallel to the direction of the concrete surface cracks, of the lime cake, and the lime cake is attached to the concrete surface through the fixing holes to be fixed.

Has the advantages that: the utility model provides a concrete surface crack propagation monitoring devices that splits can observe concrete surface crack propagation condition effectively, provides data support for concrete structure crack effectively; the device simple structure can realize the mass production.

Drawings

Fig. 1 is a schematic structural view of the present invention;

the figure includes: 1-lime cake; 2-a threading ring; 3-steel strand wires; 4-steel rule surface; 5-elastically resetting the pointer; 6-concrete slab construction; 7-crack.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the device for monitoring the crack propagation of the concrete surface crack comprises a cylindrical lime cake with the height-to-width ratio of 0.3-0.5, a steel strand and a steel graduated scale, wherein a group of threading rings are arranged around the side surface of the lime cake along the spiral direction from top to bottom, and the highest threading ring and the lowest threading ring are arranged on the same side edge of the lime cake; the steel graduated scale comprises a steel scale surface and an elastic reset pointer, and the distance of the elastic reset pointer moving along the steel scale surface is read through scales on the steel scale surface; one end of the steel strand is fixed on the thimble at the highest position, and the other end of the steel strand sequentially passes through each thimble along the spiral direction, is led out from the thimble at the lowest position, and is finally fixed with the elastic reset pointer; the lime cake is attached to the surface of the concrete and placed on the cracks on the surface of the concrete, and the steel ruler surface is fixed on the surface of the concrete.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a concrete surface crack fracture propagation monitoring devices which characterized in that: the lime cake fixing device comprises a cylindrical lime cake with the height-to-width ratio larger than 0.2, a steel strand and a steel graduated scale, wherein a group of threading rings are arranged around the side surface of the lime cake along the spiral direction from top to bottom, and the highest threading ring and the lowest threading ring are arranged on the same side edge of the lime cake; the steel graduated scale comprises a steel scale surface and an elastic reset pointer, and the distance of the elastic reset pointer moving along the steel scale surface is read through scales on the steel scale surface; one end of the steel strand is fixed on the thimble at the highest position, and the other end of the steel strand sequentially passes through each thimble along the spiral direction, is led out from the thimble at the lowest position, and is finally fixed with the elastic reset pointer; the lime cake is attached to the surface of the concrete and placed on the cracks on the surface of the concrete, and the steel ruler surface is fixed on the surface of the concrete.

2. The concrete surface crack propagation monitoring device of claim 1, characterized in that: the number of turns of the steel strand wound on the lime cake is more than or equal to 3.

3. The concrete surface crack propagation monitoring device of claim 1, characterized in that: the threading rings are all arranged on the side edges of the lime cake, and the included angles between the plane where the threading rings are located and the side surfaces of the two sides of the corresponding side edges of the lime cake are equal.

4. The concrete surface crack propagation monitoring device of claim 1, characterized in that: the steel strand wires are led out from the lowest threading ring, and the steel strand wires on two sides of the lowest threading ring are on the same straight line.

5. The concrete surface crack propagation monitoring device of claim 1, characterized in that: the thimble is U type structure, and two feet of U type structure are prefabricated on the lime cake.

6. The concrete surface crack propagation monitoring device of claim 1, characterized in that: and fixing holes are formed in the two side faces of the lime cake parallel to the direction of the concrete surface crack, and the lime cake is attached to the concrete surface through the fixing holes for fixing.