CN112832552A - Cement-based material repairing component and repairing method - Google Patents

Abstract

The invention provides a cement-based material repairing component which comprises a hot melting strip, an electric heating wire and an expansion bag, wherein the electric heating wire and the expansion bag are arranged in the hot melting strip, a wiring end of the electric heating wire penetrates out of the outer end of the hot melting strip, a temperature control expansion material is filled in the expansion bag, an end component is arranged at the outer end of the hot melting strip, a thread is arranged on the outer surface of the end component, the end component is embedded in the outer surface of a cement-based material structure and is tightly combined with the outer surface of the cement-based material structure through the thread, the wiring end of the electric heating wire penetrates out of the end component, and a pressure sensor is arranged in the hot melting strip or the end component.

Description

Cement-based material repairing component and repairing method

Technical Field

The invention relates to the field of concrete structure repair, in particular to a cement-based material repair component and a repair method.

Background

Under the long-term action of external loads such as earthquake load, fatigue load and the like, the cracking and the damage of a concrete structure are inevitable phenomena. This not only can destroy the wholeness of concrete structure, still can change the atress condition, causes the structure to lose design function, causes great potential safety hazard. The conventional repairing methods comprise a pressure grouting method, a slotting and filling method and a coating closing method, and all the work needs an intuitive working surface and a larger working space to ensure the repairing quality.

For underground projects such as concrete pile foundations, tunnels, dam foundations and the like, the damage of the underground projects is different from the structural damage of buildings on the ground, the damaged parts cannot be observed visually, a proper operation space is not available, and effective repair is difficult to realize by a conventional method. After the earthquake occurs, the damaged and damaged concrete structure is scientifically and reasonably repaired, and the method has important economic and social benefits.

Disclosure of Invention

In view of the above, the present invention provides a cement-based material repairing member and a repairing method thereof.

The invention is realized by adopting the following scheme: a cement-based material repairing component comprises a hot melting strip, an electric heating wire and an expansion bag, wherein the electric heating wire and the expansion bag are both arranged in the hot melting strip, a wiring terminal of the electric heating wire penetrates out of the outer end of the hot melting strip, and a temperature control expansion material is filled in the expansion bag.

Furthermore, an end component is installed at the outer end of the hot melting strip, threads are arranged on the outer surface of the end component, the end component is embedded into the outer surface of the cement-based material structure and is tightly combined with the cement-based material structure through the threads, and a wiring end of the electric heating wire penetrates out of the end component.

Further, a pressure sensor is arranged in the hot melt strip or the end head component.

Furthermore, the hot melt strip is made of hot melt adhesive.

Furthermore, the temperature control expansion material is a substance which is liquid or solid under the temperature and the normal pressure, and the substance is heated to the gasification or sublimation reaction temperature by an electric heating wire and then is changed into gas to expand the expansion bag; or the temperature control expansion material is a solid single substance or a mixture, and the substance generates a large amount of gas when being heated to the decomposition or chemical reaction temperature by an electric heating wire, so that the expansion bag is expanded.

Further, the temperature control expansion material is iodine or sulfur; or alcohols, freons, hydrocarbons; or any one of sodium bicarbonate, calcium carbonate and potassium permanganate.

Furthermore, the expansion bag is positioned in the center of the hot melting strip and arranged along the axial direction of the hot melting strip, and the electric heating wire is positioned on the peripheral side of the expansion bag.

A method for repairing a cementitious material, comprising the steps of:

the method comprises the following steps: after the cement-based material is vibrated, a certain number of automatic bonding repair components are pre-embedded at required positions, and the end of the electric heating wire terminal needs to be exposed out of the surface;

step two: after the cement-based material structural body is damaged under the action of external load, connecting the end of the electric heating wire terminal with an external power supply, and heating the hot melting strip by the electric heating wire until the hot melting strip is melted and the expansion bag is expanded; if the cement-based material structure is damaged to generate cracks, under the extrusion action of the expansion bag, the melted hot melting strips penetrate into and fill the surrounding structural cracks, the structural cracks are bonded again, and the repair is completed to recover the bearing capacity; if the cement-based material structure is not damaged, the melted hot melting strip still stays at the original position, and the electric heating wire is gradually solidified after power failure for subsequent repair.

Compared with the prior art, the invention has the following beneficial effects: the structure is simple, the design is reasonable, the operation space is small, the use is convenient, the cement-based material structure body can be repaired, and the method is very suitable for underground concealed engineering.

Drawings

Fig. 1 is a schematic longitudinal sectional view of a repair member.

Fig. 2 is a schematic cross-sectional view of a repair element.

Fig. 3 is a schematic longitudinal sectional view of the repair member including the head member.

In the figure: 1-hot-melt strip; 2-an electric heating wire; 3-an inflatable balloon; 4-end member.

Detailed Description

The invention is further explained below with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1-3, a cement-based material repairing component comprises a hot-melt strip, an electric heating wire and an expansion bag, wherein the electric heating wire and the expansion bag are both arranged in the hot-melt strip, a wiring terminal of the electric heating wire penetrates out from the outer end of the hot-melt strip, a temperature control expansion material is filled in the expansion bag, the expansion bag is heated in a heating mode through resistance heating, the electric heating wire is electrified when the surrounding structure is damaged and needs to be repaired, the electric heating wire generates heat through self resistance of the electric heating wire, the hot-melt strip is melted, and the expansion bag expands;

the action principle of the repair component is as follows: in underground engineering such as concrete pile foundation, tunnel, dam foundation and the like, when the cement-based material structure is damaged and cracked, the hot melt strip is melted by electrifying and heating, and the hot melt strip permeates and fills the surrounding structural cracks under the extrusion action of the expansion bag; on one hand, the structural body cracks are bonded again to restore the bearing capacity; on the other hand, underground water and air are prevented from contacting the internal steel bars, so that the steel bars are prevented from being locally corroded; meanwhile, the repairing component only repairs the concrete structure with cracks, and for the concrete structure which is not damaged, the melted hot melt strip still stays at the original position, and the repairing function is still realized at the later stage.

In this embodiment, end component is installed to hot melt strip outer end, and end component surface is provided with the screw thread, and end component embedding cement-based material structure's surface and through the screw thread rather than the close coupling, the wiring end of heater wire is worn out by end component, and end component can prevent to spill over cement-based material structure after hot melt strip melts.

In this embodiment, a pressure sensor is installed in the hot melt strip or in the end member, so that the pressure of liquid under the extrusion action of the expansion bladder after the hot melt strip is melted can be tested, a test signal is transmitted out through a lead, and whether cracks exist in the concrete structure can be intelligently judged according to the reading of the pressure sensor and the expansion characteristic of the heating expandable/gasified material, so that a basis and guidance are provided for repairing the whole structure.

The method for judging whether the concrete structure has cracks comprises the following steps: when the electric heating is carried out, the expansion bag expands; if the reading of the pressure sensor continuously rises along with the rise of the temperature, the repair material can be judged not to seep out, and no crack exists around the intelligent repair component; if the pressure sensor reading does not continuously increase with increasing temperature, it can be determined that the repair material may seep out and there is a crack around the intelligent repair member.

In this embodiment, the material of hot melt strip is the hot melt adhesive, is the solid at ordinary temperature, heats to certain temperature and becomes ability flow, and has certain viscidity liquid, solidifies once more after stopping heating to crack around the shutoff, and with inside reinforcing bar of structure and structure crack groundwater and air isolated.

In this embodiment, the temperature-controlled expansion material is a liquid or solid substance at normal temperature and pressure, and the substance is heated by an electric heating wire to a gasification or sublimation reaction temperature and then changed into a gas, so as to expand the expansion bladder; or the temperature control expansion material is a solid single substance or a mixture, and the substance generates a large amount of gas when being heated to the decomposition or chemical reaction temperature by an electric heating wire, so that the expansion bag is expanded.

In this embodiment, the temperature-controlled expansion material is a substance that is heated by iodine, sulfur, etc. and then sublimated from a solid to a gas; or substances such as alcohol, freon, hydrocarbons, etc. which are gasified into gas from liquid after being heated; or any one of substances which can generate chemical reaction and generate gas by heating sodium bicarbonate, calcium carbonate, potassium permanganate and the like.

In this embodiment, the expansion bag is located in the center of the hot-melt strip and axially arranged along the hot-melt strip, the electric heating wire is located on the outer peripheral side of the expansion bag, and after the hot-melt strip is melted, the expansion bag can extrude the hot-melt strip into the cracks of the surrounding structure.

A method for repairing a cementitious material, comprising the steps of:

the method comprises the following steps: after the cement-based material is vibrated, a certain number of automatic bonding repair components are pre-embedded at required positions, and the end of the electric heating wire terminal needs to be exposed out of the surface;

step two: after the cement-based material structural body is damaged under the action of external load, connecting the end of the electric heating wire terminal with an external power supply, and heating the hot melting strip by the electric heating wire until the hot melting strip is melted and the expansion bag is expanded; if the cement-based material structure is damaged to generate cracks, under the extrusion action of the expansion bag, the melted hot melting strips penetrate into and fill the surrounding structural cracks, the structural cracks are bonded again, and the repair is completed to recover the bearing capacity; if the cement-based material structure is not damaged, the melted hot melting strip still stays at the original position, and the electric heating wire is gradually solidified after power failure for subsequent repair.

If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using a bolt or screw connection) can also be understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims (8)

1. A cement-based material repair member characterized by: the temperature control expansion wire comprises a hot melting strip, an electric heating wire and an expansion bag, wherein the electric heating wire and the expansion bag are both arranged in the hot melting strip, a wiring end of the electric heating wire penetrates out of the outer end of the hot melting strip, and a temperature control expansion material is filled in the expansion bag.

2. The cement-based material repair kit of claim 1, wherein: the outer end of the hot melting strip is provided with an end component, the outer surface of the end component is provided with threads, the end component is embedded into the outer surface of the cement-based material structure and is tightly combined with the outer surface of the cement-based material structure through the threads, and the wiring end of the electric heating wire penetrates out of the end component.

3. The cement-based material repair kit of claim 2, wherein: and a pressure sensor is arranged in the hot melt strip or the end component.

4. The cement-based material repair kit of claim 1, wherein: the hot melt strip is made of hot melt adhesive.

5. A cement-based material repair kit according to claim 1 or 2, wherein: the temperature control expansion material is a substance which is liquid or solid under the temperature and the normal pressure, and the substance is heated to the gasification or sublimation reaction temperature by an electric heating wire and then is changed into gas to expand the expansion bag; or the temperature control expansion material is a solid single substance or a mixture, and the substance generates a large amount of gas when being heated to the decomposition or chemical reaction temperature by an electric heating wire, so that the expansion bag is expanded.

6. The cement-based material repair kit of claim 5, wherein: the temperature control expansion material is iodine or sulfur; or alcohols, freons, hydrocarbons; or any one of sodium bicarbonate, calcium carbonate and potassium permanganate.

7. The cement-based material repair kit of claim 5, wherein: the expansion bag is positioned in the center of the hot melting strip and arranged along the axial direction of the hot melting strip, and the electric heating wire is positioned on the peripheral side of the expansion bag.

8. A method of repairing a cementitious material using a cementitious material repair structure as claimed in claim 1 or claim 2, comprising the steps of:

the method comprises the following steps: after the cement-based material is vibrated, a certain number of automatic bonding repair components are pre-embedded at required positions, and the end of the electric heating wire terminal needs to be exposed out of the surface;

step two: after the cement-based material structural body is damaged under the action of external load, connecting the end of the electric heating wire terminal with an external power supply, and heating the hot melting strip by the electric heating wire until the hot melting strip is melted and the expansion bag is expanded; if the cement-based material structure is damaged to generate cracks, under the extrusion action of the expansion bag, the melted hot melting strips penetrate into and fill the surrounding structural cracks, the structural cracks are bonded again, and the repair is completed to recover the bearing capacity; if the cement-based material structure is not damaged, the melted hot melting strip still stays at the original position, and the electric heating wire is gradually solidified after power failure for subsequent repair.

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