CN114965467B - Method for distinguishing steel bars in grouted sleeve from inner wall of sleeve in drilling inspection - Google Patents
Method for distinguishing steel bars in grouted sleeve from inner wall of sleeve in drilling inspection Download PDFInfo
- Publication number
- CN114965467B CN114965467B CN202210504986.0A CN202210504986A CN114965467B CN 114965467 B CN114965467 B CN 114965467B CN 202210504986 A CN202210504986 A CN 202210504986A CN 114965467 B CN114965467 B CN 114965467B
- Authority
- CN
- China
- Prior art keywords
- sleeve
- drilling
- observation
- characteristic part
- grout outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a method for distinguishing reinforcing steel bars in a grouted sleeve from the inner wall of the sleeve by drilling and checking, which comprises the steps of firstly preparing an observation pore canal, drilling until the inner cavity of the sleeve is in contact with a metal object, stopping, adopting a front vision measuring lens of an endoscope to extend into the observation pore canal to observe whether pattern-shaped drilling and grinding trace exists at the end, if not, continuing drilling, if not, searching a characteristic part in the observation pore canal, wherein the characteristic part is a grouting opening or a grout outlet for the observation pore canal formed by drilling along the grouting pore canal or the grout outlet, and finding out the characteristic part by reaming operation; for an observation pore canal formed by drilling from the middle part of the sleeve, the characteristic part is a pore wall, a front vision measuring lens of the endoscope extends into the observation pore canal, a point-to-point distance measuring function is adopted to measure the judgment distance from the grinding trace on the surface of the metal object to the characteristic part, if the judgment distance is smaller than the inner diameter of the sleeve, the judgment distance is a connecting steel bar, otherwise, the judgment distance is the inner wall of the sleeve. The invention is convenient to operate, and can make accurate judgment according to the measurement result and the judgment criterion.
Description
Technical Field
The invention relates to the technical field of assembled buildings, in particular to a method for distinguishing reinforcing steel bars in a grouted sleeve from the inner wall of the sleeve by drilling inspection.
Background
In fabricated concrete structures, component connection is a critical node to ensure the overall quality of the structure. The grouting connection of the steel bar sleeve is a common steel bar connection mode in an assembled concrete structure, and is a steel bar butt connection mode realized by inserting steel bars into a metal sleeve pre-embedded in a precast concrete member and grouting cement base grouting material. The connecting steel bars inserted into the sleeve serve as main bearing members for load transmission of different prefabricated components, and the anchoring length of the connecting steel bars is one of key factors for ensuring the grouting connection reliability of the sleeve. However, as the grouting port end connecting steel bars cannot be positioned due to component production or field installation deviation, the phenomenon that the grouting port end connecting steel bars are cut short or cut off exists individually, the effective anchoring length of the steel bars is reduced, the strength of the grouting connecting joint of the steel bar sleeve cannot meet the requirement, and potential safety hazards exist. Therefore, inspection and length detection for the reinforcing bars connected in the sleeve are very important.
After the installation of the vertical prefabricated component is completed, grouting materials do not exist in the sleeve, grouting and grouting pore canals, at the moment, the endoscope can directly extend in, whether connecting steel bars exist in the sleeve or not can be conveniently checked, and quantitative detection can be carried out on the insertion length of the connecting steel bars. The invention patent with publication number of CN108663006A, a method for detecting the insertion depth of connecting steel bars in a fully grouting sleeve steel bar joint, and the invention patent with publication number of CN109141274A, a method for detecting the insertion depth of connecting steel bars in a half grouting sleeve steel bar joint, respectively provide detection methods of the insertion lengths of connecting steel bars of the fully grouting sleeve and the half grouting sleeve.
For the sleeve after grouting construction, grouting materials exist in the sleeve and in a grouting hole channel, and an endoscope cannot directly extend into the inner cavity of the sleeve to check or measure the length of the connecting steel bars. For the semi-grouting sleeve, whether the connecting steel bars exist in the sleeve can be checked from a grouting hole or a grouting hole drilling, and whether the inserted length of the steel bars meets the requirement can be qualitatively checked from the grouting hole drilling according to the characteristic that the tail end of the inserted section of the connecting steel bars is positioned at the height of the grouting hole of the sleeve when the connecting steel bars are inserted in a long enough way. For the full grouting sleeve, as the tail ends of the inserted sections of the connecting steel bars at the installation end and the connecting steel bars at the prefabricated end are positioned in the middle of the sleeve, the drilling of the grouting hole channel or the grouting hole channel can only be used for checking whether the connecting steel bars exist in the sleeve, if the requirement on the insertion length of the connecting steel bars is met, the drilling of the grouting hole channel is only carried out from the height position corresponding to the preset insertion end point of the connecting steel bars in the middle of the sleeve, and whether the connecting steel bars are inserted sufficiently can be qualitatively judged by observing whether the steel bars exist at the tail ends of the drilling hole channel through an endoscope.
The method is characterized in that after drilling, an endoscope is adopted to observe whether the end of a drilling hole channel exposes drilling and grinding trace of the stone drill bit and the reinforcing steel bar, if the metal is drilled and ground by the stone drill bit, the connecting reinforcing steel bar is judged to be present, otherwise, the connecting reinforcing steel bar is not present, and then whether the insertion length of the reinforcing steel bar meets the requirement is judged according to the drilling position. However, in essence, the above method is uncertain, and may be misjudged because the inner wall of the sleeve on the back of the drilling side is also made of metal, when no steel bar is connected in the sleeve, the stone drill bit directly drills to the inner wall of the sleeve after entering the inner cavity of the sleeve, and the stone drill bit are displayed as drilling and grinding marks similar to those of the steel bar after drilling and grinding, and the misjudgment is easy to be performed only by observing through an endoscope as shown in fig. 1.
In view of the above, a solution that is easy to think is to distinguish whether the drill and wear mark observed by the endoscope is a connecting steel bar or the inner wall of the sleeve by measuring the length of the drill hole channel and combining the arrangement position of the sleeve in the wall. The distinguishing method utilizes that the distance from the surface of the connecting steel bar to the starting point of the hole passage of the drilling hole is about 25 mm different from the distance from the surface of the inner wall of the sleeve to the starting point of the hole passage of the drilling hole (the difference is equal to the diameter of the connecting steel bar plus the gap between the steel bar and the inner wall of the sleeve, and the difference is about 25 mm for the sleeve of the common type). It should be noted that this method of differentiation has a limitation in that the drilled holes must be perpendicular to the surface of the component, otherwise failure or misjudgment occurs. However, in the actual situation, when the member is manufactured, the grout outlet channel and the grouting channel of the sleeve are bound and fixed with the distributing ribs on the edge and often obliquely intersect with the surface of the member, particularly the sleeve arranged at the far end in the member, the length variation range of the grout outlet channel and the grouting channel is about 25 mm, and 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 length of the drilled channel is simply used for judging and distinguishing the inner wall of the steel bar or the sleeve, misjudgment can be necessarily caused.
Therefore, for a sleeve in which grouting has been completed, when a connection reinforcing bar in the sleeve is inspected by drilling using an endoscopic method, a method capable of accurately distinguishing the reinforcing bar from an inner wall of the sleeve is required.
Disclosure of Invention
The invention aims to solve the technical problems and provide a method for distinguishing the steel bars in the grouted sleeve from the inner wall of the sleeve by drilling and checking, which is convenient to operate and can make accurate judgment according to the measurement result and the judgment criterion.
In order to solve the technical problems, the invention provides a method for distinguishing reinforcing steel bars in a grouted sleeve from the inner wall of the sleeve by drilling inspection, which comprises the following steps:
s1, preparing an observation duct; drilling until the inner cavity of the sleeve is in contact with the metal object, and stopping;
s2, checking drilling and grinding marks on the surface of the metal object; and (3) carrying out ash removal treatment on the observation pore canal, adopting a front vision measuring lens of the endoscope to extend into the observation pore canal to observe whether a pattern-shaped drilling and grinding trace exists at the end, if so, entering the next step, and if not, returning to the step (S1).
S3, finding out characteristic parts at the intersection joint of the observation pore canal and the sleeve body;
for an observation pore canal formed by drilling along the grouting pore canal or the grout outlet pore canal, the characteristic part is a grouting port or a grout outlet, and the grouting port and the grout outlet are found through reaming operation of the observation pore canal;
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 from the grinding trace on the surface of the metal object to the characteristic part; extending a front vision measuring lens of the endoscope from the observation hole, and measuring the judgment distance from the grinding trace on the surface of the metal object to the characteristic part by adopting a point-to-point distance measuring function;
s5, if the judging 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 vision measuring lens is not larger than 6 mm.
In the S1, the diameter of a drill bit adopted in drilling is 2-4 mm larger than that of a front vision measuring lens; when a slurry outlet channel or a grouting channel is drilled, the drill bit adopts a stony drill bit, and the stony drill bit stops crunching after touching a metal object, and the preparation of the channel is observed to be completed; when the middle part of the sleeve is drilled, the drilling position is positioned on the surface of a corresponding component in the middle part of the sleeve, during drilling, a stoner drill bit is firstly adopted to drill through concrete on the outer side of the sleeve, then a gold drill bit is adopted to drill through the wall of the sleeve, finally the stoner drill bit is adopted to drill into grouting material in the sleeve until the stoner drill bit stops when touching metal objects, and the preparation of a pore canal is observed.
Further, in S3, the reaming operation is divided into two stages:
in the first stage reaming operation, long-distance reaming is carried out for a time, the reaming length is equal to the vertical distance from the body of the sleeve to the surface of the component, ash removal treatment is carried out after reaming is finished, a front vision measuring lens of an endoscope is adopted for observation, if the characteristic part can be identified, S4 is carried out, and if the characteristic part cannot be identified, the second stage reaming operation is carried out;
in the second stage of reaming operation, short-distance reaming is carried out, the length of the short-distance reaming is 5-10 mm, a forward-looking measuring lens of an endoscope is adopted for observation after one-time short-distance reaming, if the characteristic part can be identified, S4 is carried out, and if the characteristic part cannot be identified, one-time short-distance reaming is continued until the characteristic part can be identified.
Further, for the observation hole formed by drilling along the grouting hole or the grouting hole, the characteristic part is identified after the reaming operation, and the identification method is as follows:
when the grout outlet pipe is connected with the grout outlet nozzle and the grout outlet pipe is connected with the grout outlet nozzle in a jacket mode, distinguishing characteristic parts by searching the grout outlet nozzle or the grout outlet nozzle;
when the grout outlet pipe is connected with the grout outlet nozzle and the grout outlet pipe is connected with the grout outlet nozzle in an interpolation mode, at least one ground color stripe exposing the grout outlet pipe or the grout outlet pipe is formed in reaming operation, and the end of the ground color stripe is the characteristic part.
Further, in S4, a front view measuring lens of the endoscope is adopted to extend into the observation hole until approaching the characteristic part, imaging is performed on the characteristic part and the grinding trace on the surface of the metal object at the end of the hole, when the imaging at the selected position is clear, an image is obtained by shooting, the first point is selected on the grinding trace on the surface of the metal object by utilizing the point-to-point distance measuring function of the endoscope, the second point is selected on the characteristic part, and the distance between the two points is measured to obtain the judgment distance.
Further, if in S4, for the observation hole formed by drilling along the grouting hole or the grout outlet hole, when the drilling trace on the surface of the metal object at the end of the hole and the feature part cannot be clearly observed at the same time, reaming is performed on the section of the observation hole located in the inner cavity of the sleeve, wherein the reaming diameter is consistent with the section located in the grout outlet hole.
Further, in S3, for an observation hole formed by drilling from the middle of the sleeve, the hole wall reveals metallic luster in the observation hole, both front and rear sides of the metallic luster are gray, and the hole wall position is judged according to the position of the metallic luster, namely, the part corresponding to the metallic luster is a characteristic part.
Further, in S3, for the observation tunnel formed by drilling from the middle of the sleeve, the center point of the drilling 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 steel bar from the sleeve wall by observing into the problem of measuring the distance between the characteristic points, fully utilizes the distance from the inner wall of the cylinder body at the back of the drilling side to the characteristic part (comprising the grout outlet characteristic part, the grouting port characteristic part and the sleeve wall characteristic part) on the sleeve body at the drilling side to be equal to or larger than the inner diameter of the sleeve, the distance from the connecting steel bar to the characteristic part on the sleeve body at the drilling side to be smaller than the inner diameter of the sleeve, the former is more than twice as large as the latter, and the difference between the latter and the inner diameter of the sleeve is the sum of the diameter of the connecting steel bar and the gap between the steel bar and the sleeve wall, and is usually not smaller than 20 mm in a series of characteristics, so that the connecting steel bar and the sleeve wall can be accurately distinguished according to the measurement result even if the characteristic part of the sleeve body at the drilling side is positioned and captured with little deviation, the capturing tolerance of the characteristic part is strong, the operation is convenient, and accurate judgment can be made according to the measurement result and judgment criterion.
Drawings
FIG. 1 is a view of a prior art endoscope for viewing drill marks in an observation tunnel;
FIG. 2 is a flow chart of a discrimination method of the present invention;
FIG. 3 is a schematic illustration of a semi-grouted sleeve of the present invention drilled from a grout outlet passage to the inner wall of the sleeve;
FIG. 4 is a schematic illustration of the full grout sleeve of the present invention drilled from the grout outlet to the connecting rebar;
FIG. 5 is a schematic view of the present invention as it is being observed and measured using an endoscope while drilling holes into the connecting rebar;
FIG. 6 is a schematic view of the present invention as it is being drilled into the inner wall of a sleeve and as it is being observed and measured using an endoscope;
FIG. 7 is a schematic view of the structure of the present invention when connected in the form of a sleeve;
fig. 8 is a schematic view of the invention from the middle of the sleeve drilling.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Referring to fig. 2, an embodiment of a method for inspecting a steel bar in a grouted sleeve from an inner wall of the sleeve according to the present invention can be divided into two types according to working conditions, namely, drilling judgment along a grouting hole or a grout outlet hole; 2. judging for drilling from the middle part of the sleeve;
working condition I
In order to judge the drilling of the grouting hole or the grout outlet hole, the sleeve 1 is divided into a half grouting sleeve and a full grouting sleeve, the half grouting sleeve and the full grouting sleeve are provided with the grouting hole and the grout outlet hole, and the same method is adopted in the distinguishing and judging process, as follows:
the method comprises the steps that tools are needed to be prepared before distinguishing and judging, wherein the tools comprise a drilling electric tool, a stone drill, an endoscope with a front vision measuring lens and an ash removing tool, the diameter of the front vision measuring lens is not more than 6 mm, and the diameter of the stone drill is 2-4 mm larger than that of the front vision measuring lens;
firstly, preparing an observation hole channel, and matching a drilling electric tool with a stoneware drill bit to drill along the grouting hole channel or the slurry outlet hole channel 2 to form an observation hole channel 3, wherein the observation hole channel 3 is drilled to the inner cavity of the sleeve and is stopped after the inner cavity is contacted with a metal object, namely the stoneware drill bit is stopped after contacting with the metal object, referring to fig. 3 and 4, the connecting steel bars in the half grouting sleeve in fig. 3 do not exceed the height of the grout outlet channel, so that the connecting steel bars can reach the inner wall of the sleeve after being drilled from the grout outlet channel, and fig. 4 is a drilling hole of the full grouting sleeve, and the connecting steel bars can reach the surface after being drilled from the grout outlet channel.
Then, checking drilling and grinding marks on the surface of the metal object; firstly, ash cleaning is carried out on an observation hole by adopting an ash cleaning tool, a front vision measuring lens of an endoscope 4 is adopted to extend into the observation hole to observe whether pattern drilling and grinding trace exists at the end, if no drilling and grinding trace exists, the situation is likely to be that drilling and grinding trace is misjudged, a metal object is not touched, or the strength is insufficient after the metal object is touched, and no drilling and grinding trace is formed, and the situation needs to extend into the drilled hole again by adopting a stone drill to continue to drill inwards until the pattern drilling and grinding trace is formed on the surface of the metal object.
Then, a characteristic part at the intersection of the observation hole and the body of the sleeve needs to be found, wherein the characteristic part refers to a slurry outlet or a slurry inlet, and the slurry outlet and the slurry inlet are found through hole reaming operation of the observation hole; specifically, the reaming operation is divided into two stages, in the first stage reaming operation, long-distance reaming is firstly performed, the reaming length is equal to the vertical distance from the body of the sleeve to the surface of the component, the perpendicular distance is obtained from the design drawing, ash removal treatment is performed after the reaming is finished, observation is performed by adopting a front vision measuring lens of an endoscope, if the characteristic part can be identified, the reaming operation is finished, if the characteristic part cannot be identified, construction deviation and other problems possibly exist, and long-distance reaming cannot meet the requirement, so that the second stage reaming operation is performed; in the second stage of reaming operation, short-distance reaming is carried out, the length of the short-distance reaming is 5-10 mm, a forward-looking measuring lens of an endoscope is adopted for observation after one-time short-distance reaming, if the characteristic part can be identified, the reaming operation is finished, and if the characteristic part cannot be identified, one-time short-distance reaming is carried out until the characteristic part can be identified.
In the process of identifying the characteristic parts, two connection modes exist between the grout outlet pipe and the grout outlet nozzle and between the grout outlet pipe and the grout outlet nozzle, so that the two connection modes 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 outlet pipe is connected with the grout outlet nozzle in a jacket mode, distinguishing characteristic parts of the grout outlet nozzle or the grout outlet nozzle are found, the grout outlet nozzle and the grout outlet nozzle are of self structures on the sleeve and are positioned in the pipeline, and are easy to observe after reaming, and the grouting device is shown in FIG. 7; when the grout pipe and the grout pipe are connected in an interpolation mode and the grout pipe are connected with the grout pipe in an interpolation mode, at least one ground color stripe exposing the grout pipe or the grout pipe is formed in reaming operation, and the end of the ground color stripe is a characteristic part, and is shown with reference to fig. 5 and 6.
After the characteristic part is found, measuring the judgment distance from the grinding trace on the surface of the metal object to the characteristic part; specifically, when the front view measuring lens of the endoscope extends into the observation hole channel until approaching the characteristic part, imaging the characteristic part and the grinding trace on the surface of the metal object at the end of the hole channel, shooting to obtain an image when the imaging at the selected position is clear, and using the point-to-point distance measuring function of the endoscope, wherein the first point is selected on the grinding trace on the surface of the metal object, the second point is selected on the characteristic part, measuring the distance between the two points to obtain a judging distance, and if the judging distance is smaller than the inner diameter of the sleeve, referring to fig. 5, judging that the metal object is the connecting steel bar 5, otherwise referring to fig. 6, judging that the metal object is the inner wall of the sleeve.
In the above method, because the hole is to be reamed, and the hole-reaming depth is smaller than the observation hole depth, the inside of the observation hole will form a step shape, and the step structure has a blocking condition, when the characteristic part and the grinding trace on the surface of the metal object at the end of the hole cannot be clearly observed at the same time, the section of the observation hole located in the inner cavity of the sleeve is reamed, the hole-reaming diameter is consistent with the section located in the slurry outlet hole, and the observation interference is relieved as shown in fig. 6.
Working condition II
In order to judge the drilling of the middle part of the sleeve, compared with the first working condition, an observation pore canal formed by drilling the middle part of the sleeve is needed, and the following method is adopted in the distinguishing judging process:
firstly, preparing an observation pore canal, positioning a drilling position on the surface of a corresponding component in the middle of a sleeve, drilling through concrete on the outer side of the sleeve by using a stone drill during drilling, drilling through the wall of the sleeve by using a gold drill, and finally drilling grouting material in the sleeve by using the stone drill until the stone drill stops when the stone drill touches a metal object, and finishing the preparation of the observation pore canal. The middle part of the sleeve does not refer to the axial central point of the sleeve, the drilling position is selected according to the structural characteristics of the half grouting sleeve and the full grouting sleeve, and specifically, the central point of the drilling is positioned on the inner side of the connecting steel bar design anchoring end point and is not smaller than the radius of the drill bit, and the drilling position is shown by referring to fig. 8.
Then, checking drilling and grinding marks on the surface of the metal object; and finding out the characteristic part at the intersection of the observation hole channel and the body of the sleeve, wherein the characteristic part in the working condition is a hole wall obtained by drilling on the wall of the sleeve, specifically, for the observation hole channel formed by drilling from the middle part of the sleeve, the hole wall can show metallic luster in the observation hole channel, both the front side and the rear side of the metallic luster are gray, and the hole wall position is judged according to the position of the metallic luster, namely, the part corresponding to the metallic luster is the characteristic part, and referring to fig. 8.
And then measuring the judgment distance from the grinding trace 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 for illustrating the technical solution of the present invention, and are not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A method for borehole inspection of a grouted sleeve for distinguishing a rebar from an inner wall of the sleeve, comprising the steps of:
s1, preparing an observation duct; drilling until the inner cavity of the sleeve is in contact with the metal object, and stopping;
s2, checking drilling and grinding marks on the surface of the metal object; carrying out ash removal treatment on the observation pore canal, adopting a front vision measuring lens of an endoscope to extend into the observation pore canal to observe whether a pattern-shaped drilling and grinding trace exists at the end, if so, entering the next step, and if not, returning to the step S1;
s3, finding out characteristic parts at the intersection joint of the observation pore canal and the sleeve body;
for an observation pore canal formed by drilling along the grouting pore canal or the grout outlet pore canal, the characteristic part is a grouting port or a grout outlet, and the grouting port and the grout outlet are found through reaming operation of the observation pore canal;
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 from the grinding trace on the surface of the metal object to the characteristic part; extending a front vision measuring lens of the endoscope from the observation hole, and measuring the judgment distance from the grinding trace on the surface of the metal object to the characteristic part by adopting a point-to-point distance measuring function;
s5, if the judging 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;
in S1, the diameter of a drill bit adopted in drilling is 2-4 mm larger than that of a front vision measuring lens; when a slurry outlet channel or a grouting channel is drilled, the drill bit adopts a stony drill bit, and the stony drill bit stops crunching after touching a metal object, and the preparation of the channel is observed to be completed; when the middle part of the sleeve is drilled, the drilling position is positioned on the surface of a corresponding component in the middle part of the sleeve, a stoner drill is firstly adopted to drill through concrete on the outer side of the sleeve during drilling, then a gold drill is adopted to drill through the wall of the sleeve, finally the stoner drill is adopted to drill into grouting material in the sleeve until the stoner drill stops when touching metal objects, and the preparation of a pore canal is observed;
s3, for an observation pore passage formed by drilling from the middle part of the sleeve, the pore wall shows metallic luster in the observation pore passage, both the front side and the rear side of the metallic luster are gray, and the position of the pore wall, namely the part corresponding to the metallic luster, is judged to be a characteristic part according to the position of the metallic luster;
s3, reaming operation is divided into two stages:
in the first stage reaming operation, long-distance reaming is carried out for a time, the reaming length is equal to the vertical distance from the body of the sleeve to the surface of the component, ash removal treatment is carried out after reaming is finished, a front vision measuring lens of an endoscope is adopted for observation, if the characteristic part can be identified, S4 is carried out, and if the characteristic part cannot be identified, the second stage reaming operation is carried out;
in the second stage of reaming operation, short-distance reaming is carried out, the length of the short-distance reaming is 5-10 mm, a front vision measuring lens of an endoscope is adopted for observation after one-time short-distance reaming, if the characteristic part can be identified, S4 is carried out, and if the characteristic part cannot be identified, one-time short-distance reaming is continued until the characteristic part can be identified;
for an observation pore canal formed by drilling along a grouting pore canal or a grouting pore canal, identifying a characteristic part after reaming operation, the identification method is as follows:
when the grout outlet pipe is connected with the grout outlet nozzle and the grout outlet pipe is connected with the grout outlet nozzle in a jacket mode, distinguishing characteristic parts by searching the grout outlet nozzle or the grout outlet nozzle;
when the grout outlet pipe is connected with the grout outlet nozzle and the grout outlet pipe is connected with the grout outlet nozzle in an interpolation mode, at least one ground color stripe exposing the grout outlet pipe or the grout outlet pipe is formed in reaming operation, and the end of the ground color stripe is the characteristic part.
2. The method of borehole inspection of steel reinforcement within a grouted sleeve from the inner wall of the sleeve of claim 1, wherein the diameter of the forward looking measurement lens is no greater than 6 mm.
3. The method for distinguishing reinforcing steel bars in a grouted sleeve from the inner wall of the sleeve according to claim 1, wherein in S4, a front vision measuring lens of an endoscope is adopted to extend from an observation hole channel until approaching to a characteristic part, imaging is carried out on the characteristic part and the surface drill abrasion marks of the metal object at the end of the hole channel, when the imaging of a selected position is clear, an image is obtained by shooting, the first point is selected on the surface drill abrasion marks of the metal object by utilizing the distance measuring function from the endoscope point to point, the second point is selected on the characteristic part, and the distance between the two points is measured to obtain the judgment distance.
4. A method of inspecting a steel bar in a grouted sleeve from an inner wall of the sleeve according to claim 3, wherein if in S4, for an observation tunnel formed by drilling along the grouting tunnel or the grout outlet tunnel, when drilling marks on the surface of the metal object at the characteristic part and the end of the tunnel cannot be clearly observed at the same time, reaming is performed on a section of the observation tunnel located in the inner cavity of the sleeve, wherein the reaming diameter is consistent with the section located in the grout outlet tunnel.
5. The method of examining a steel bar in a grouted sleeve from an inner wall of the sleeve according to claim 1, wherein in S3, for an observation port formed from a middle hole of the sleeve, a center point of the hole is located inside a design anchoring end point of the connecting steel bar and is not smaller than a radius of the drill bit.
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 CN114965467A (en) | 2022-08-30 |
| CN114965467B true CN114965467B (en) | 2023-04-25 |
Family
ID=82981317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210504986.0A Active CN114965467B (en) | 2022-05-10 | 2022-05-10 | Method for distinguishing steel bars in grouted sleeve from inner wall of sleeve in drilling inspection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114965467B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008203275A (en) * | 2008-05-27 | 2008-09-04 | Nishimatsu Constr Co Ltd | Inspection method of concrete, and measurement tool used for it |
| CN107288268A (en) * | 2017-06-27 | 2017-10-24 | 浙江大学 | Endoscope detects the structure and its method of grouting behind shaft or drift lining plug-in type sleeve reinforced bar joint |
| CN109141274B (en) * | 2018-08-01 | 2019-05-03 | 昆山市建设工程质量检测中心 | A method of reinforcing bar insertion depth is connected in half grout sleeve splice of detection |
| CN108663006B (en) * | 2018-08-01 | 2019-03-19 | 昆山市建设工程质量检测中心 | A method of detecting connection reinforcing bar insertion depth in full grout sleeve splice |
| CN113030098B (en) * | 2021-02-26 | 2024-05-17 | 上海市建筑科学研究院有限公司 | Method for detecting and processing sleeve connection reinforcing steel bar cutoff |
| 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 |
-
2022
- 2022-05-10 CN CN202210504986.0A patent/CN114965467B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114965467A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114965467B (en) | Method for distinguishing steel bars in grouted sleeve from inner wall of sleeve in drilling inspection | |
| JP4886921B2 (en) | Effective diameter confirmation method of ground improvement body | |
| CN109707109B (en) | Sleeve filling and renovating method based on different grouting defect depths | |
| CN109211909B (en) | Sleeve grouting fullness detection method based on core drilling pore-forming | |
| CN108562593A (en) | The plumpness method of inspection of reinforced bar sleeve grouting material | |
| CN102926413A (en) | Embedded pipe for sampling pile tip of filling pile | |
| CN105649010A (en) | Grouting pile construction technology | |
| CN110042822A (en) | Measure the inclination measurement device and tilt measurement of the displacement of Rock And Soil multidirection horizontal | |
| CN211541741U (en) | Full grout sleeve convenient to detect reinforcing bar depth of insertion | |
| CN110514466B (en) | Method for drilling grouting material core sample from reinforcing steel bar sleeve grouting connection node | |
| US6581453B1 (en) | Method and apparatus for detecting and localizing unwanted matter internally in a pipe string | |
| CN113492461B (en) | Method for preparing endoscopic hole for detecting grouting connection construction quality of sleeve | |
| CN111828049B (en) | Shallow-buried underground excavation tunnel advanced small guide pipe construction method | |
| JP5070984B2 (en) | Shape confirmation system for root bulbs in foundation pile construction | |
| CN212621572U (en) | Thin-wall soil sampler | |
| CN113529814A (en) | Method for detecting wall quality of hectometer-level ultra-deep underground continuous wall by drilling and coring | |
| CN113340246B (en) | Method for measuring insertion length of steel bar in sleeve extending into reference object from outside | |
| CN113219056A (en) | Ultrasonic detection method for grouting fullness of prefabricated concrete structure sleeve | |
| JP3388723B2 (en) | Drilling device and drilling method | |
| JP2005233819A (en) | Neutralized depth measuring method for concrete structure and probe used therefor | |
| JP2853922B2 (en) | Bowling bar | |
| CN115961785B (en) | Grouting pipe extending position adjusting method for repairing grouting sleeve | |
| CN211548398U (en) | Half grout sleeve convenient to detect reinforcing bar depth of insertion | |
| CN111650246A (en) | Defect detection method for building foundation cast-in-place pile | |
| CN111560996A (en) | Defect detection and repair method for cast-in-place pile in constructional engineering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |