CN107288268A - Endoscope detects the structure and its method of grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint - Google Patents

Abstract

The invention discloses a structure and a method for detecting post-grouting plug-in sleeve steel bar joints by an endoscope method, and belongs to the technical field of detection. Use an industrial endoscope to observe whether the steel bars in the sleeve are in place. This method is easy to operate, the result is intuitive and reliable, it is applicable to a wide range of working conditions, and is less affected by site construction conditions; at the same time, it can check whether the grouting channel and the grouting channel are unobstructed , to provide guarantee for the subsequent grouting construction quality.

Description

The structure and method of post-grouting plug-in sleeve steel joints detected by endoscope

technical field

The invention belongs to the field of detection methods, and in particular relates to a structure and a method of an endoscopic detection post-grouting plug-in sleeve steel bar joint.

Background technique

With the continuous development of my country's social economy, the housing industry has also developed rapidly, which has led to the adjustment and upgrading of the entire national economic structure and has become an important pillar industry of the national economy. An important task of my country's current housing construction is to promote the modernization of the housing industry. As an emerging green, environmentally friendly and energy-saving building method, the prefabricated building structure has attracted the attention of real estate developers, construction companies and designers due to its advantages such as fast construction speed, good economic and environmental benefits. The prefabricated building structure is an effective way to realize the modernization and sustainable development of the housing industry, and represents the direction of technological progress in the construction industry.

Although there are many advantages of prefabricated building structures, the first problem that people pay attention to is still how to ensure their safe and normal use within the life span. The quality of the on-site connection nodes of prefabricated components has become an important factor affecting the quality of prefabricated buildings. The on-site connection of prefabricated components in prefabricated buildings often uses the post-grouting sleeve inserting steel bar connection method. The main working principle is: a prefabricated component built-in The steel bar is threaded with the sleeve, and the exposed steel bar of another prefabricated component is inserted into the sleeve. After the assembly is completed, high-strength concrete is injected through the grouting hole (hose) (if the grouting hole is not exposed, the hose can be used to connect the surface of the wall ), so that the two prefabricated components can be connected through sleeves and steel bars.

This connection method can achieve a very firm connection between the two prefabricated components under the condition of ensuring the construction quality, but various problems may occur during the construction process, which may cause the steel bars that should be inserted into the sleeve to be cut off or the steel bars are not as long as required. It is inserted into the steel bar sleeve, thereby affecting the quality of the on-site connection nodes of the prefabricated components, and causing certain safety hazards in the assembled prefabricated building. In summary, the development of a detection method that can effectively and accurately detect whether the steel bars in the sleeve are in place is very important to ensure the construction quality of prefabricated buildings and the wide-scale promotion and use of prefabricated buildings.

Industrial endoscope inspection is a kind of visual inspection in non-destructive inspection. It can directly reflect the internal situation of the object to be inspected, and can dynamically record or photograph the entire inspection process while inspecting. Quantitative analysis is carried out on the defects found, and the length and area of the defects are measured. At present, industrial endoscopes have been widely used in various departments of modern core industries such as aviation, automobiles, and civil engineering.

Contents of the invention

Considering that the post-grouting sleeve insertion type steel bar connection method may cause the steel bar to fail to insert the full length into the sleeve according to the specified requirements, the result will lead to problems in the connection quality of the prefabricated components of the prefabricated building and cause serious damage to the building. Potential safety hazards, it is necessary to detect the position of the steel bars in the sleeve when the on-site prefabricated components are assembled and the grouting construction is not carried out, to judge whether they are in place, and at the same time check whether the grouting and overflow channels are unobstructed, so as to provide a guarantee for the quality of subsequent grouting construction. Assure. With the help of the existing inspection equipment—industrial endoscope, it can be used for inspection in places that cannot be directly observed by the human eye, and non-destructive inspection can be realized without disassembly or destruction of assembly. Therefore, the position of the steel bar in the steel bar sleeve can be checked with the help of an industrial endoscope.

The purpose of the present invention is to design a detection structure and method, which is mainly used to detect whether the steel bar in the steel bar sleeve is inserted into the sleeve according to the required length after the on-site connection of prefabricated building components is completed and before grouting construction. There are two technical solutions to solve specific technical problems:

The first scheme is applicable to the case where the overflow channel and the grouting channel of the sleeve steel bar joint protrude from the wall: the structure of the post-grouting inserted sleeve steel bar joint is detected by the endoscope method, including the upper member prefabricated Embedded steel bars, pre-embedded steel bars in the lower member, grouting sleeve and industrial endoscope, the top of the grouting sleeve is provided with a threaded hole, and the end of the pre-embedded steel bar in the upper member is tapped and screwed to the threaded hole In the middle; the upper and lower parts of the grouting sleeve are provided with a grouting channel and a grouting channel respectively; the embedded steel bars of the lower member extend into the cavity of the grouting sleeve; An industrial endoscope host and an industrial endoscope probe connected by hoses, wherein the industrial endoscope probe extends into the grouting channel and/or overflow channel for transmitting the images in the respective channels to the industrial endoscope host superior.

The second scheme is applicable to the case where the overflow channel and the grouting channel of the sleeve steel bar joint are located inside the wall: the structure of the post-grouting inserted sleeve steel bar joint is detected by the endoscope method, including the pre-embedded steel bar of the upper member, the lower Component pre-embedded steel bar, grouting sleeve and industrial endoscope, the top of the grouting sleeve is provided with a threaded hole, and the end of the pre-embedded steel bar of the upper component is tapped and screwed and fixed in the threaded hole; The upper and lower parts of the grouting sleeve are respectively provided with overflow channels and grouting channels, and the ends of the two channels are respectively connected with a connecting hose extending to the outside of the wall; In the sleeve; the industrial endoscope includes an industrial endoscope host and an industrial endoscope probe connected by a wiring hose, wherein the industrial endoscope probe passes through the connecting hose and extends into the grouting channel and / or in the overflow channel, used to transmit the images in the respective channels to the industrial endoscope host.

Based on the above two schemes, the following preferred modes can be further provided:

Preferably, the surface of the connection hose is smooth.

As a preference, the pre-embedded reinforcement of the lower member preferably adopts ribbed reinforcement.

Preferably, the inner cavity of the grouting sleeve has grooves.

Another object of the present invention is to provide a method for detecting the joint quality of post-grouting plug-in sleeve steel bar joints by using the structure. Make the image clear; then send the wiring hose with the industrial endoscope probe into the grouting channel and the grouting channel respectively until you can see the pre-embedded steel bars of the lower component inside the grouting sleeve, and during the feeding process Check whether the grouting channel and the grouting channel are unobstructed through the returned image; observe the position of the steel bar inside the sleeve captured by the industrial endoscope probe, and judge whether the steel bar is inserted into the sleeve at a sufficient length according to the specified requirements, and complete the grouting in the sleeve The previous connection node quality inspection.

The beneficial effects of the present invention are as follows:

1. After the on-site connection of prefabricated components is completed, before grouting construction, use an industrial endoscope to observe the position of the steel bars inside the sleeve, and judge whether it is inserted into the steel bar sleeve at a sufficient length according to the specified requirements;

2. The endoscopic probe with a high-definition camera is connected to the host through a smooth hose, which can pass through various complex and curved grouting and overflow channels and enter the inside of the sleeve. It is easy to operate and is limited by site construction conditions. Small, good engineering applicability, and clear imaging, accurate judgment on the location of steel bars;

3. In the process of sending the endoscope probe into the steel sleeve, it is also possible to check whether the grouting and overflow channels of the sleeve are unblocked, so as to provide guarantee for the quality of subsequent grouting construction. This method is easy to operate, rapid in detection, intuitive and reliable in results, has good engineering practical prospects, provides guarantee for the quality of on-site connection nodes of prefabricated components, and is conducive to the popularization and application of prefabricated buildings.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the grouting sleeve-type steel bar joint after endoscopic detection in Example 1.

Fig. 2 is a schematic diagram of the structure of the grouting sleeve-type steel bar joint after endoscopic detection in Example 2.

In the figure: pre-embedded steel bar 1 for upper member, pre-embedded steel bar for lower member 2, grouting sleeve 3, industrial endoscope probe 4, overflow channel 5, grouting channel 6, wiring hose 7, wall 8 and industrial interior Looking Glass Host 9.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and implementation steps.

Example 1

As shown in Figure 1, it is a schematic diagram of the grouting sleeve-type steel bar joint method after detection by the endoscope method in this embodiment, which is suitable for the case where the overflow channel 5 and the grouting channel 6 of the sleeve steel bar joint protrude from the outside of the wall . The structure of the post-grouting plug-in sleeve steel bar joint is detected by endoscopy, including the embedded steel bar 1 of the upper member, the embedded steel bar 2 of the lower member, the grouting sleeve 3 and the industrial endoscope, and the top of the grouting sleeve 3 is provided with threads The hole has a groove in the inner cavity, and the pre-embedded steel bar 2 of the lower member is preferably ribbed steel bar to increase the grouting strength. The end of the pre-embedded steel bar 1 of the upper member is threaded and screwed and fixed in the threaded hole on the top of the grouting sleeve 3 . The upper and lower parts of the grouting sleeve 3 are provided with a grout overflow channel 5 and a grout injection channel 6 respectively. During construction, the grout is injected from the grout injection channel 6 and overflows from the grout overflow channel 5 after filling the inner cavity. The pre-embedded steel bar 2 of the lower component extends into the inner cavity of the grouting sleeve 3 . The industrial endoscope includes an industrial endoscope host 9 and two industrial endoscope probes 4, and the two industrial endoscope probes 4 are respectively connected to the host through smooth-surfaced wiring hoses 7. The industrial endoscope host 9 is provided with a screen for displaying probe images. When in use, the two industrial endoscope probes 4 respectively extend into the grouting channel 6 and the overflowing slurry channel 5 for transmitting the images in the respective channels to the industrial endoscope host 9 . Of course, only one industrial endoscope probe 4 can also be provided to extend into the grouting channel 6 and the grouting channel 5 sequentially, and the principles are the same.

The method of detecting the joint quality of post-grouting plug-in sleeve steel bar joints by using the above structure is as follows

Step 1. The prefabricated components are spliced on site according to the specified requirements, the pre-embedded steel bars 1 of the upper component are screwed to the grouting sleeve 3, and the pre-embedded steel bars 2 of the lower component are inserted into the sleeve to a specified length.

Step 2. After the on-site splicing is completed, before grouting in the sleeve, adjust the relevant parameters of the industrial endoscope to make the image display clear. Then send the smooth wiring hose 7 with the industrial endoscope probe 4 into the grouting channel 6 and the overflowing grouting channel 5, until the steel bars inside the sleeve are seen, check the grouting channel 6 and the grouting channel 5 during the feeding process. Whether the overflow channel 5 is unobstructed through the returned image. If there is a blockage, it needs to be processed through the pipe first.

Step 3. Observe the position of the pre-embedded steel bar 2 of the lower member inside the sleeve captured by the industrial endoscope probe 4, judge whether the steel bar is inserted into the sleeve at a sufficient length according to the specified requirements, and complete the quality inspection of the connection node before grouting in the sleeve.

Example 2

The difference from the previous embodiment is only that the grouting channel 5 and the grouting channel 6 of the sleeve steel joint to be detected in this embodiment are located inside the wall 8, and the grouting channel 6 and the grouting channel 5 are far away from the grouting operation. The face wall 8 is far away, so it is necessary to use a connecting hose to connect the surface of the wall in advance to form an extended grouting channel 6 and a grouting channel 5 . Then the industrial endoscopic probe 4 is sent into the extended channel to carry out the above-mentioned detection work.

One of the main problems that may arise when using the post-grouting sleeve insertion type steel bar connection method to connect prefabricated building components is whether the steel bar is really completely inserted into the sleeve (whether it may be intercepted for various reasons). The invention uses an industrial endoscope to observe whether the position of the steel bar in the sleeve is in place. The method is easy to operate, the result is intuitive and reliable, applicable to a wide range of working conditions, and is less affected by site construction conditions; at the same time, the grouting channel and the grouting channel can be checked Whether it is unobstructed provides guarantee for the quality of subsequent grouting construction.

The above-mentioned embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Various changes and modifications can be made by those skilled in the relevant technical fields without departing from the spirit and scope of the present invention. Therefore, all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (6)

1. a kind of endoscope detects the structure of grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint, the excessive slurry of described sleeve reinforced bar joint Passage (5) and slip casting passage (6) are stretched out outside wall, it is characterised in that including upper member embedded bar (1), lower member pre-buried steel Screwed hole, upper member embedded bar are provided with the top of muscle (2), grout sleeve (3) and industrial endoscope, described grout sleeve (3) (1) end is tapped and is tightened in described screwed hole；Open respectively the upper and lower part of described grout sleeve (3) Provided with excessive slurry passage (5) and slip casting passage (6)；Described lower member embedded bar (2) is stretched into grout sleeve (3) inner chamber；Institute The industrial endoscope stated includes the industrial endoscope main frame (9) being connected by wiring flexible pipe (7) and industrial endoscope probe (4), Wherein industrial endoscope probe (4) stretch into slip casting passage (6) and/or slurry passage (5) that overflows in, for by the image in respective passage Transmit to industrial endoscope main frame (9).

2. a kind of endoscope detects the structure of grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint, the excessive slurry of described sleeve reinforced bar joint Passage (5) and slip casting passage (6) are located inside wall, it is characterised in that it is pre-buried including upper member embedded bar (1), lower member Screwed hole, upper member pre-buried steel are provided with the top of reinforcing bar (2), grout sleeve (3) and industrial endoscope, described grout sleeve (3) Muscle (1) end is tapped and is tightened in described screwed hole；The upper and lower part difference of described grout sleeve (3) Overflow slurry passage (5) and slip casting passage (6) are offered, the end of two passages is connected to a connection extended to outside wall respectively Flexible pipe；Described lower member embedded bar (2) is stretched into grout sleeve (3)；Described industrial endoscope includes soft by wiring (7) connected industrial endoscope main frame (9) and industrial endoscope probe (4) are managed, wherein industrial endoscope probe (4) passes through described Connection flexible pipe stretch into slip casting passage (6) and/or slurry passage (5) that overflows in, for by the image transmission in respective passage to industry On endoscope main frame (9).

3. endoscope as claimed in claim 1 or 2 detects the structure of grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint, its feature exists In described wiring flexible pipe (7) surface is smooth.

4. endoscope as claimed in claim 1 or 2 detects the structure of grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint, its feature exists In described lower member embedded bar (2) is preferred to use Ribbed Bar.

5. endoscope as claimed in claim 1 or 2 detects the structure of grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint, its feature exists In the inner chamber of described grout sleeve (3) carries groove.

6. a kind of side using structure detection grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint node quality as claimed in claim 1 or 2 Method, it is characterised in that will be carried out after the completion of the splicing of structure scene in sleeve before mortar depositing construction, adjustment industrial endoscope make its into As clear；Then the wiring flexible pipe (7) with industrial endoscope probe (4) is respectively fed to slip casting passage (6) and the slurry passage that overflows (5), untill the internal lower member embedded bar (2) of grout sleeve (3) is seen, and the shadow during feeding by passback As checking whether slip casting passage (6) and excessive slurry passage (5) are unobstructed；Observe the sleeve inner steel that industrial endoscope probe (4) is shot Muscle position, judges whether reinforcing bar requires in the insertion sleeve of foot length according to the rules, completes the connecting node matter before slip casting in sleeve Amount detection.