CN114965467A - Method for distinguishing grouted sleeve steel bars from inner wall of sleeve during drilling inspection - Google Patents
Method for distinguishing grouted sleeve steel bars from inner wall of sleeve during drilling inspection Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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Abstract
The invention discloses a method for distinguishing a grouted sleeve from the inner wall of the sleeve when a steel bar in the grouted sleeve is inspected by drilling, wherein an observation pore channel is prepared, the drilling is stopped after reaching the inner cavity of the sleeve and touching a metal object, a forward-looking measuring lens of an endoscope is adopted to extend into the observation pore channel to observe whether a patterned drilling grinding mark exists at the end of the pore, the drilling is continued if the patterned drilling grinding mark does not exist, a characteristic part is found in the observation pore channel if the patterned drilling grinding mark exists, and the characteristic part is a grouting opening or a grout outlet for the observation pore channel formed by drilling along the grouting pore channel or the grout outlet pore and is found by reaming operation; for an observation hole channel formed by drilling from the middle of the sleeve, the characteristic part is a hole wall, a front-view measuring lens of the endoscope extends into the observation hole channel, the judging distance between the grinding mark on the surface of the metal object and the characteristic part is measured by adopting a point-to-point distance measuring function, if the judging distance is smaller than the inner diameter of the sleeve, the sleeve is used as a connecting reinforcing steel bar, otherwise, the sleeve is used as the inner wall of the sleeve. The method is convenient and fast to operate, and accurate judgment can be made according to the measurement result and the judgment criterion.
Description
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a method for distinguishing a grouted sleeve from the inner wall of the sleeve when a hole is drilled for checking a steel bar in the sleeve.
Background
In the fabricated concrete structure, the component connection is a key node for ensuring the overall quality of the structure. The steel bar sleeve grouting connection is a steel bar connection form commonly used in an assembled concrete structure, and refers to a steel bar butt joint connection mode realized by inserting steel bars into metal sleeves pre-embedded in a precast concrete member and pouring cement-based grouting material. The connecting steel bars inserted into the sleeve are used as main carriers for load transmission of different prefabricated parts, and the anchoring length of the connecting steel bars is one of key factors for ensuring the grouting connection reliability of the sleeve. However, the grouting opening end connecting steel bar cannot be in place due to component production or field installation deviation, the grouting opening end connecting steel bar is cut short or cut off individually, the effective anchoring length of the steel bar is reduced, the strength of the steel bar sleeve grouting connecting joint cannot meet the requirement, and potential safety hazards exist. Therefore, inspection and length detection of the connecting bars in the sleeve is very important.
After vertical prefabricated component installation is accomplished, before the sleeve grout construction, all there is not the grout material in the sleeve and grout, the play thick liquid pore, and the endoscope can directly stretch into this moment, has or not connecting reinforcement and can carry out quantitative determination to connecting reinforcement inserted length in the convenient inspection sleeve. The invention patent with publication number CN108663006A, a method for detecting the insertion depth of the connecting steel bar in the steel bar joint of the full grouting sleeve, and the invention patent with publication number CN109141274A, a method for detecting the insertion depth of the connecting steel bar in the steel bar joint of the half grouting sleeve, provide methods for detecting the insertion lengths of the connecting steel bar of the full grouting sleeve and the half grouting sleeve respectively.
For the sleeve which is already grouted, grouting materials exist in the sleeve and in grouting and grout outlet channels, and the endoscope cannot directly extend into the inner cavity of the sleeve to inspect or measure the length of the connecting steel bar. For the semi-grouting sleeve, whether the connecting steel bars exist in the sleeve or not can be checked from the grout outlet channel or the grouting channel, and whether the inserting length of the steel bars meets the requirement or not can be qualitatively detected from the grout outlet channel according to the characteristic that the tail end of the inserting section of the connecting steel bars is located at the height of the grout outlet of the sleeve when the connecting steel bars are inserted for a long time. For the full grouting sleeve, the tail ends of the insertion sections of the installation end connecting steel bars and the prefabricated end connecting steel bars are located in the middle of the sleeve, drilling holes in a grout outlet channel or a grouting channel can only check whether the connecting steel bars exist in the sleeve, if the inserting length of the connecting steel bars meets the requirement, the holes can only be drilled from the height position corresponding to the preset inserting end point of the connecting steel bars in the middle of the sleeve, and the endoscope is used for observing whether the steel bars exist at the end of the drilling channel to qualitatively judge whether the connecting steel bars are inserted for a sufficient length.
The method seems to be that after drilling, an endoscope is used for observing whether the end of a drilling hole channel shows the stone drill bit and the drilling abrasion traces of the reinforcing steel bars or not, if the traces of metal abraded by the stone drill bit exist, the connecting reinforcing steel bars are judged to be present, otherwise, the connecting reinforcing steel bars do not exist, and then whether the insertion length of the reinforcing steel bars meets the requirement or not is judged according to the drilling position. However, in fact, the above method has uncertain factors, and there may be misjudgment because the inner wall of the sleeve on the back of the drilling side is also made of metal, when there is no connecting steel bar in the sleeve, the masonry drill bit will directly drill to the inner wall of the sleeve after entering the inner cavity of the sleeve, and the masonry drill bit will show a drilling and grinding trace similar to that of the steel bar after drilling and grinding, as shown in fig. 1, it is easy to misjudge by observing only through an endoscope.
In view of the above situation, an easily conceivable solution is to distinguish whether the drill wear scar observed by the endoscope is a connection steel bar or the inner wall of the sleeve by measuring the length of the drill hole and combining the arrangement position of the sleeve in the wall. The distinguishing method utilizes that the distance between the surface of the connecting steel bar and the starting point of the drill hole channel is compared with the distance between the surface of the inner wall of the sleeve and the starting point of the drill hole channel to form a difference value of about 25 mm (the difference value is equal to the diameter of the connecting steel bar plus the clearance between the steel bar and the inner wall of the sleeve, and is about 25 mm for the sleeve of a common model). It should be noted that there is a limitation to this method of differentiation in that the drilled hole must be perpendicular to the surface of the component, or it may fail or be misjudged. However, in practical situations, when a component is manufactured, the grout outlet channel and the grouting channel of the sleeve are often obliquely intersected with the surface of the component for binding and fixing with the distribution ribs on the edge, and especially the length variation range of the grout outlet channel and the grouting channel of the sleeve arranged at the far end in the component is about 25 mm, so that the length variation range of the drilling channel originally used for distinguishing the reinforcing steel bars or the inner wall of the sleeve is just covered. Therefore, after drilling along the grout outlet channel or the grouting channel, if the inner wall of the steel bar or the sleeve is judged and distinguished simply by the length of the drilling channel, the condition of misjudgment is inevitably generated.
Therefore, for the sleeve in which the grouting work has been completed, when the connecting reinforcing bars in the sleeve are inspected by boring holes using an endoscope, a method capable of precisely distinguishing the reinforcing bars from the inner wall of the sleeve is required.
Disclosure of Invention
The invention aims to solve the technical problems and provides a method for distinguishing the steel bars in a grouted sleeve from the inner wall of the sleeve during drilling inspection, which is convenient to operate and can make accurate judgment according to a measurement result and a judgment criterion.
In order to solve the technical problem, the invention provides a method for distinguishing a grouted sleeve from the inner wall of the sleeve when a hole is drilled and the steel bar in the grouted sleeve is checked, which comprises the following steps:
s1, preparing an observation pore channel; drilling to the inner cavity of the sleeve and stopping after contacting with metal objects;
s2, checking the drilling and grinding trace on the surface of the metal object; and (4) performing ash removal treatment on the observation duct, extending a front-view measuring lens of the endoscope into the observation duct to observe whether the pattern-shaped drilling and grinding mark exists at the end, and if so, entering the next step, and if not, returning to S1.
S3, finding out the characteristic part of the joint of the observation duct and the body of the sleeve;
for an observation pore channel formed by drilling along the grouting pore channel or the grout outlet pore channel, the characteristic part is a grouting port or a grout outlet port, and the grouting port and the grout outlet port are found by reaming the observation pore channel;
for an observation pore canal formed by drilling a hole in the middle of the sleeve, the characteristic part is a pore wall obtained by drilling a hole on the wall of the sleeve;
s4, measuring the judgment distance between the grinding trace on the surface of the metal object and the characteristic part; a forward-looking measuring lens of the endoscope is inserted from an observation pore channel, and the judging distance between the drilling grinding trace on the surface of the metal object and the characteristic part is measured by adopting the point-to-point distance measuring function;
s5, if the distance is smaller than the inner diameter of the sleeve, the metal object can be judged to be the connecting steel bar, otherwise, the metal object can be judged to be the inner wall of the sleeve.
Further, the diameter of the front-view measuring lens is not more than 6 mm.
Further, in S1, the diameter of the drill bit used in drilling is 2-4 mm larger than the diameter of the front-view measuring lens; when drilling a slurry outlet channel or a grouting channel, the drill bit is a stonework drill bit, the stonework drill bit stops when contacting with a metal object, and the channel preparation is observed to be finished; when the middle part of the sleeve is drilled, the drilling position is positioned on the surface of a component corresponding to the middle part of the sleeve, a stonework drill bit is firstly adopted to drill through concrete outside the sleeve, then the stonework drill bit is adopted to drill through the cylinder wall of the sleeve, and finally the stonework drill bit is adopted to drill into grouting material in the sleeve until the stonework drill bit touches metal objects, the "creaky sound" is stopped, and the observation of the preparation of the pore channel is completed.
Further, in S3, the reaming operation is divided into two stages:
in the first-stage reaming operation, performing long-distance reaming for once, wherein the reaming length is equal to the vertical distance from the sleeve body to the surface of the component, performing ash removal treatment after reaming, observing by using a forward-looking measuring lens of an endoscope, and entering S4 if the characteristic part can be identified, or entering the second-stage reaming operation if the characteristic part cannot be identified;
in the second-stage hole expanding operation, short-distance hole expansion is carried out, the length of the short-distance hole expansion is 5-10 mm, observation is carried out by adopting a forward-looking measuring lens of an endoscope after the short-distance hole expansion is carried out once, if the characteristic part can be identified, S4 is carried out, and if the characteristic part cannot be identified, the short-distance hole expansion is carried out once again until the characteristic part can be identified.
Further, for the observation pore channel formed by drilling along the grouting pore channel or the grout outlet pore channel, the characteristic part is identified after the reaming operation, and the identification method comprises the following steps:
when the grout outlet pipe is connected with the grout outlet nozzle and the grout pipe is connected with the grout outlet nozzle in an outer sleeve mode, distinguishing characteristic parts by finding the grout outlet nozzle or the grout nozzle;
when the grout outlet pipe is connected with the grout outlet nozzle and the grout pipe is connected with the grout outlet nozzle in an inserting mode, at least one bottom color stripe exposed out of the grout outlet pipe or the grout pipe is formed in the hole expanding operation, and the end of the bottom color stripe is the characteristic part.
Further, in S4, a forward-looking measuring lens of the endoscope is used to extend into the observation tunnel until approaching the characteristic portion, the characteristic portion and the wear scar on the surface of the metal object at the end of the tunnel are imaged, when the selected position is imaged clearly, an image is captured, by using the function of ranging from point to point of the endoscope, the first point is selected on the wear scar on the surface of the metal object, the second point is selected on the characteristic portion, and the distance between the two points is measured to obtain the judgment distance.
Further, if in S4, for the observation hole formed along the grouting hole or the grout outlet hole, when the feature and the wear mark on the surface of the metal object at the end of the hole cannot be observed clearly at the same time, the section of the observation hole located in the inner cavity of the sleeve is reamed, and the reaming diameter is the same as that of the section located in the grout outlet hole.
Further, in S3, for the observation hole formed by drilling from the middle of the sleeve, the hole wall shows the metallic luster in the observation hole, both the front and rear sides of the metallic luster are gray, and the position of the hole wall is determined according to the position of the metallic luster, that is, the portion corresponding to the metallic luster is the characteristic portion.
Further, in S3, for the observation hole drilled from the middle of the sleeve, the central point of the drilling hole is located inside the designed anchoring end point of the connecting steel bar and is not smaller than the radius of the drill bit.
The invention has the beneficial effects that:
the invention converts the problem of distinguishing the connecting reinforcing steel bar and the sleeve wall only by observation into the problem of distance measurement between characteristic points, fully utilizes the combination of the characteristics that the distance from the inner wall of the sleeve body on the back of the drilling side to the characteristic part (comprising a grout outlet characteristic part, a grout inlet characteristic part and a sleeve wall characteristic part) on the sleeve body on the drilling side is certainly larger than or equal to the inner diameter of the sleeve, the distance from the connecting reinforcing steel bar to the characteristic part on the sleeve body on the drilling side is certainly smaller than the inner diameter of the sleeve, the former is more than twice of the latter, and the difference between the latter and the inner diameter of the sleeve is the sum of the diameter of the connecting reinforcing steel bar and the clearance between the reinforcing steel bar and the sleeve wall, and is usually not smaller than 20 mm, so that the connecting reinforcing steel bar and the sleeve wall can be accurately distinguished according to the measurement result even under the condition that the characteristic part of the sleeve body on the drilling side is positioned and captured with a little deviation, the method has the advantages of strong capturing tolerance of the characteristic part, convenient operation and accurate judgment according to the measurement result and the judgment criterion.
Drawings
FIG. 1 is a view of a prior art endoscope used to observe burr traces in an observation tunnel;
FIG. 2 is a flow chart of the discrimination method of the present invention;
FIG. 3 is a schematic view of a semi-grouted casing of the present invention drilled from a grout outlet port to the inside wall of the casing;
FIG. 4 is a schematic view of a fully grouted sleeve of the present invention drilled from a grout hole to a connecting reinforcement;
FIG. 5 is a schematic view of the present invention being used for endoscopic observation and measurement while drilling into the connecting rebar;
FIG. 6 is a schematic representation of the invention as it is being viewed and measured endoscopically while drilling into the interior wall of the sleeve;
FIG. 7 is a schematic view of the present invention in a configuration when connected in a jacket form;
FIG. 8 is a schematic view of the present invention as distinguished from drilling a hole in the middle of the sleeve.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 2, an embodiment of the method for distinguishing the steel bars in the grouted sleeve from the inner wall of the sleeve during the drilling inspection according to the present invention can be divided into two types according to the working conditions, wherein the first type is a drilling judgment along a grouting channel or a grout outlet channel; secondly, judging by drilling from the middle part of the sleeve;
working condition one
For the method along grout hole or the method that the pore of leaving thick liquid drilled a hole judgement, sleeve 1 divide into half grout sleeve and full grout sleeve, half grout sleeve and full grout sleeve all have grout hole and a pore of leaving thick liquid, adopt the same method in the process of distinguishing the judgement, as follows:
before distinguishing and judging, tools are required to be prepared, and the tools comprise a drilling electric tool, a drill bit, an endoscope and an ash removal tool, wherein the drill bit is a stone drill bit, the endoscope is provided with a front-view measuring lens, the diameter of the front-view measuring lens is not more than 6 mm, and the diameter of the stone drill bit is 2-4 mm larger than that of the front-view measuring lens;
firstly, preparing an observation pore channel, and drilling a hole along a grouting pore channel or a grout outlet pore channel 2 by matching a drilling electric tool with a stonework drill bit to form an observation pore channel 3, wherein the hole is drilled to an inner cavity of the sleeve and stops drilling after the stonework drill bit touches a metal object, namely the stonework drill bit touches the metal object and stops 'creak' stopping, as shown in a figure 3 and a figure 4, a connecting steel bar in a half grouting sleeve in the figure 3 does not exceed the height of the grout outlet pore channel, so that the connecting steel bar directly reaches the inner wall of the sleeve after the grout outlet pore channel is drilled, and a fully grouting sleeve is drilled in the figure 4, and the hole can directly reach the surface of the connecting steel bar from the grout outlet pore channel.
Then, checking the drilling and grinding trace on the surface of the metal object; firstly, a dust cleaning tool is adopted to perform dust cleaning treatment on an observation duct, a front-view measuring lens of an endoscope 4 is adopted to stretch into the observation duct to observe whether a patterned drilling and grinding trace exists at the end, if the patterned drilling and grinding trace does not exist, the drilling and grinding trace is possibly misjudged, a metal object is not touched, or the force is not enough after the metal object is touched, the drilling and grinding trace is not formed, in the situation, a stone drill bit needs to be adopted again to stretch into a drilled hole to continuously drill inwards until the patterned drilling and grinding trace is formed on the surface of the metal object.
Then, a characteristic part at the joint of the observation pore channel and the body of the sleeve needs to be found, wherein the characteristic part refers to a grout outlet or a grouting opening, and the grout outlet and the grouting opening are found through the hole expanding operation of the observation pore channel; specifically, the reaming operation is divided into two stages, in the first stage reaming operation, long-distance reaming is firstly carried out, the reaming length is equal to the vertical distance from the sleeve body to the surface of the component and can be obtained from a design drawing, ash removal treatment is carried out after reaming is finished, observation is carried out by adopting a forward-looking measuring lens of an endoscope, if a characteristic part can be identified, the reaming operation is finished, if the characteristic part cannot be identified, problems such as construction deviation and the like possibly exist, the long-distance reaming cannot meet the requirement, and therefore the second stage reaming operation is carried out; and in the second-stage hole expanding operation, short-distance hole expanding is carried out, the length of the short-distance hole expanding is 5-10 mm, the short-distance hole expanding is carried out for one time, a forward-looking measuring lens of an endoscope is used for observation, if the characteristic part can be identified, the hole expanding operation is finished, and if the characteristic part cannot be identified, the short-distance hole expanding is carried out again until the characteristic part can be identified.
In the process of identifying the characteristic part, because two connection forms exist between the grout outlet pipe and the grout outlet nozzle and between the grouting pipe and the grouting nozzle, the two connection forms need to be distinguished and judged respectively, and the identification method is as follows: when the grout outlet pipe is connected with the grout outlet nozzle and the grout pipe is connected with the grout nozzle in a jacket manner, the characteristic part is identified by searching the grout outlet nozzle or the grout nozzle, the grout outlet nozzle and the grout nozzle are both of the structure on the sleeve and are positioned in the pipeline, and the grout outlet nozzle and the grout nozzle are easily observed after reaming, as shown in fig. 7; when the grout outlet pipe and the grout outlet nozzle and the grout pipe and the grout nozzle are connected in an inserting mode, at least one bottom color stripe exposed out of the grout outlet pipe or the grout pipe is formed in the hole expanding operation, and the end of the bottom color stripe is a characteristic part, as shown in fig. 5 and 6.
After the characteristic part is found, measuring the judgment distance between the grinding trace drilled on the surface of the metal object and the characteristic part; specifically, a forward-looking measuring lens of an endoscope is extended into the observation hole channel from the observation hole channel until the forward-looking measuring lens is close to the characteristic part, the characteristic part and the surface of the metal object at the end of the hole channel are drilled and abraded traces are imaged, when the imaging of the selected position is clear, an image is shot, the first point is selected on the drilled and abraded traces on the surface of the metal object by utilizing the distance measuring function from the point to the point of the endoscope, the second point is selected on the characteristic part, the distance between the two points is measured to obtain a judgment distance, if the judgment distance is smaller than the inner diameter of the sleeve, as shown in figure 5, the metal object can be judged to be the connecting steel bar 5, otherwise, as shown in figure 6, the metal object can be judged to be the inner wall of the sleeve.
In the method, because hole expansion is needed and the hole expansion depth is smaller than the observation hole channel depth, a step-shaped structure is formed inside the observation hole channel and has a blocking condition, when the drilling and grinding traces on the surface of a metal object at the end of the observation hole channel and a characteristic part cannot be observed clearly at the same time, the section of the observation hole channel, which is positioned in the inner cavity of the sleeve, is expanded, the hole expansion diameter is consistent with the section positioned in the slurry outlet hole channel, and the observation interference is relieved as shown in fig. 6.
Working condition two
In order to judge the drilling from the middle part of the sleeve, compared with the first working condition, the observation pore channel formed by drilling from the middle part of the sleeve is needed, and the following method is adopted in the distinguishing and judging process:
firstly, preparing an observation hole channel, positioning a drilling position on the surface of a component corresponding to the middle part of the sleeve, firstly drilling concrete outside the sleeve by using a stonework drill bit, then drilling the cylinder wall of the sleeve by using a metalworking drill bit, and finally drilling grouting material in the sleeve by using the stonework drill bit until the stonework drill bit touches a metal object to generate a 'creaky sound', and finishing the preparation of the observation hole channel. The middle part of the sleeve does not refer to the axial central point of the sleeve, and the drilling position is selected according to the structural characteristics of the half grouting sleeve and the full grouting sleeve, specifically, the central point of the drilling is positioned on the inner side of the designed anchoring terminal point of the connecting steel bar and is not less than the radius of the drill bit, and the method is shown in fig. 8.
Then, the drilling and grinding trace on the surface of the metal object needs to be checked; and finding out a characteristic part at the joint of the observation pore channel and the sleeve body, wherein the characteristic part in the working condition is a pore wall obtained by drilling a hole on the wall of the sleeve, specifically, for the observation pore channel formed by drilling a hole from the middle part of the sleeve, the pore wall can show metallic luster in the observation pore channel, the front side and the rear side of the metallic luster are gray, and judging the position of the pore wall according to the position of the metallic luster, namely, the part corresponding to the metallic luster is the characteristic part, which is shown in fig. 8.
And then measuring the judgment distance from the drill grinding mark on the surface of the metal object to the characteristic part, if the judgment distance is smaller than the inner diameter of the sleeve, judging that the metal object is a connecting steel bar, otherwise, judging that the metal object is the inner wall of the sleeve.
The above embodiments are only intended to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A method for distinguishing a grouted sleeve from the inner wall of the sleeve when the steel bar in the sleeve is inspected by drilling is characterized by comprising the following steps:
s1, preparing an observation pore channel; drilling to the inner cavity of the sleeve and stopping after contacting with metal objects;
s2, checking the drilling and grinding trace on the surface of the metal object; and (4) performing ash removal treatment on the observation duct, extending a front-view measuring lens of the endoscope into the observation duct to observe whether the pattern-shaped drilling and grinding mark exists at the end, and if so, entering the next step, and if not, returning to S1.
S3, finding out the characteristic part of the joint of the observation duct and the body of the sleeve;
for an observation pore channel formed by drilling along the grouting pore channel or the grout outlet pore channel, the characteristic part is a grouting port or a grout outlet port, and the grouting port and the grout outlet port are found by reaming the observation pore channel;
for an observation pore canal formed by drilling from the middle part of the sleeve, the characteristic part is a pore wall obtained by drilling on the wall of the sleeve;
s4, measuring the judgment distance between the grinding trace on the surface of the metal object and the characteristic part; a forward-looking measuring lens of the endoscope is inserted from an observation pore channel, and the judging distance between the drilling grinding trace on the surface of the metal object and the characteristic part is measured by adopting the point-to-point distance measuring function;
s5, if the distance is smaller than the inner diameter of the sleeve, the metal object can be judged to be a connecting steel bar, otherwise, the metal object can be judged to be the inner wall of the sleeve.
2. The method of claim 1, wherein the forward-looking measurement lens has a diameter of no greater than 6 mm.
3. The method for boring a hole to inspect the steel bar inside the grouted sleeve, which is distinguished from the inner wall of the sleeve, according to claim 1, wherein in S1, the diameter of the drill used in boring the hole is 2-4 mm larger than the diameter of the front view measuring lens; when drilling a slurry outlet channel or a grouting channel, the drill bit adopts a stonework drill bit, the stonework drill bit stops creaking sound after contacting a metal object, and the channel preparation is observed to be finished; when the middle part of the sleeve is drilled, the drilling position is positioned on the surface of a component corresponding to the middle part of the sleeve, a stonework drill bit is firstly adopted to drill through concrete outside the sleeve, then the stonework drill bit is adopted to drill through the cylinder wall of the sleeve, and finally the stonework drill bit is adopted to drill into grouting material in the sleeve until the stonework drill bit touches metal objects, the "creaky sound" is stopped, and the observation of the preparation of the pore channel is completed.
4. The method of claim 1, wherein the reaming operation is divided into two stages in S3:
in the first-stage reaming operation, performing long-distance reaming for once, wherein the reaming length is equal to the vertical distance from the sleeve body to the surface of the member, performing ash removal treatment after reaming, observing by using a forward-looking measuring lens of an endoscope, and entering S4 if a characteristic part can be identified, or entering a second-stage reaming operation if the characteristic part cannot be identified;
in the second-stage hole expanding operation, short-distance hole expansion is carried out, the length of the short-distance hole expansion is 5-10 mm, observation is carried out by adopting a forward-looking measuring lens of an endoscope after the short-distance hole expansion is carried out once, if the characteristic part can be identified, S4 is carried out, and if the characteristic part cannot be identified, the short-distance hole expansion is carried out once again until the characteristic part can be identified.
5. The method of claim 4, wherein the characteristic portion is identified after the reaming operation for the observation hole formed along the grouting hole or the grout outlet hole, the method comprising:
when the grout outlet pipe is connected with the grout outlet nozzle and the grout pipe is connected with the grout outlet nozzle in an outer sleeve mode, distinguishing characteristic parts by finding the grout outlet nozzle or the grout nozzle;
when the grout outlet pipe is connected with the grout outlet nozzle and the grout pipe is connected with the grout outlet nozzle in an inserting mode, at least one bottom color stripe exposed out of the grout outlet pipe or the grout pipe is formed in the hole expanding operation, and the end of the bottom color stripe is the characteristic part.
6. The method according to claim 1, wherein in step S4, the forward-looking measuring lens of the endoscope is used to extend into the observation hole from the observation hole until approaching the characteristic portion, the characteristic portion and the wear scar on the surface of the metal object at the end of the hole are imaged, when the selected position is clearly imaged, an image is obtained by shooting, and the first point is selected on the wear scar on the surface of the metal object by using the distance measuring function from point to point of the endoscope, and the second point is selected on the characteristic portion, and the distance between the two points is measured to obtain the judgment distance.
7. The method according to claim 6, wherein if the observation hole is drilled along the grouting hole or the grout outlet hole in step S4, when the characteristic part and the metal surface at the end of the hole can not be observed clearly at the same time, the section of the observation hole in the inner cavity of the sleeve is reamed, and the diameter of the reamed section is consistent with that of the section in the grout outlet hole.
8. The method of claim 1, wherein in step S3, for the observation hole drilled from the middle of the sleeve, the hole wall shows a metallic luster in the observation hole, both the front and rear sides of the metallic luster are gray, and the position of the hole wall is determined according to the position of the metallic luster, i.e. the portion corresponding to the metallic luster is the characteristic portion.
9. The method of claim 1, wherein the center point of the bore hole is located inside the designed anchoring end point of the connected reinforcing bars and is not less than the radius of the drill bit for the observation hole formed by drilling from the middle of the sleeve in the step S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210504986.0A CN114965467B (en) | 2022-05-10 | 2022-05-10 | Method for distinguishing steel bars in grouted sleeve from inner wall of sleeve in drilling inspection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210504986.0A CN114965467B (en) | 2022-05-10 | 2022-05-10 | Method for distinguishing steel bars in grouted sleeve from inner wall of sleeve in drilling inspection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114965467A true CN114965467A (en) | 2022-08-30 |
| CN114965467B CN114965467B (en) | 2023-04-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115961785A (en) * | 2022-12-30 | 2023-04-14 | 昆山市建设工程质量检测中心 | Method for adjusting extending position of grout supplementing pipe for semi-grouting sleeve grouting repair and remediation |
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| JP2008203275A (en) * | 2008-05-27 | 2008-09-04 | Nishimatsu Constr Co Ltd | Inspection method of concrete, and measurement tool used for it |
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| CN113091610A (en) * | 2021-04-01 | 2021-07-09 | 淮安国宇工程检测有限公司 | Detection method for measuring connection stability of sleeve and steel bar based on vision |
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| JP2008203275A (en) * | 2008-05-27 | 2008-09-04 | Nishimatsu Constr Co Ltd | Inspection method of concrete, and measurement tool used for it |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115961785A (en) * | 2022-12-30 | 2023-04-14 | 昆山市建设工程质量检测中心 | Method for adjusting extending position of grout supplementing pipe for semi-grouting sleeve grouting repair and remediation |
| CN115961785B (en) * | 2022-12-30 | 2023-09-01 | 昆山市建设工程质量检测中心 | Grouting pipe extending position adjusting method for repairing grouting sleeve |
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| CN114965467B (en) | 2023-04-25 |
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