JP4922150B2 - Deep hole formation method of concrete structure, inspection method thereof and repair method thereof - Google Patents

Description

  The present invention relates to a method for forming a deep hole in a concrete structure that forms a deep hole in a work surface such as a floor surface or a wall surface of the concrete structure, and an inspection of the concrete structure that inspects the internal state of the deep hole formed in the concrete structure. The present invention relates to a method for repairing a concrete structure and repairing from a deep hole formed in the concrete structure.

  In recent years, reinforced concrete structures such as piers and buildings made of reinforced concrete have been improved in order to improve seismic strength due to deterioration caused by intrusion of rainwater or acid rain, neutralization by carbon dioxide, deterioration due to changes over time, etc. Or, in order to diagnose the inside of the concrete, it is necessary to drill the concrete and inspect or repair the inside of the concrete. A diamond core bit is used for drilling a reinforced concrete structure.

  As for the diamond core bit, a large core bit having a diameter of 45 to 25 mm is currently used as a standard. When the diamond core bit is used, a hole is formed in the concrete structure in a state where a columnar concrete block is cut out inside the cylindrical core bit.

When a hole for inspection or repair is formed in a concrete structure, for example, the formed hole is filled with liquid, and the inside of the hole is cleaned by applying ultrasonic vibration to facilitate inspection or repair. It is known (see, for example, Patent Document 1).
In addition, as a method of inspecting or repairing concrete structures, drill two or more holes, insert a contact into one of the holes, and apply electricity, heat, vibration, or sound to the other hole. It is known to inspect the state of concrete by measuring electricity, heat, vibration, and sound generated and transmitted to a contact (see, for example, Patent Document 2).

Japanese Patent Laying-Open No. 2006-22540 (paragraph numbers 0029 to 0049, FIGS. 1 to 9) JP 2006-38752 A (paragraph numbers 0015 to 0035, FIGS. 1 to 9)

  However, when drilling a hole in a conventional concrete structure, if a diamond core bit is used, the diameter of the hole is increased and the strength of the concrete structure is reduced. Further, there is a possibility that the reinforcing bar is cut. For this reason, it has not been possible to meet the demand for reducing the hole diameter and drilling deeply. A drilling tool having a small hole diameter is also known, but if the shaft is thin and used as it is, a deep hole could not be formed in the concrete. Here, the small hole diameter means, for example, within 25 mm, and the deep hole means, for example, a depth of 10 times or more with respect to the hole diameter.

And in the structure which cleans the inside of the hole formed in the concrete structure, since the drilling work and the cleaning work are performed in separate processes, labor or work time such as replacement work of the drilling device and the cleaning device is excessive. I was looking.
Also, once the hole has been formed, the procedure for cleaning by inserting a liquid or the like into the hole, and if there is a crack in the hole, the concrete chips generated during drilling work will enter the crack in the hole. Therefore, it takes time for the cleaning work, and in some cases, it is impossible to eliminate the concrete chips that have entered the cracks.
Further, when a hole is drilled in a concrete structure to inspect or repair the inside, a deep hole cannot be drilled with a small diameter, so that only the surface side of the concrete structure can be inspected or repaired.

  The present invention was devised in view of conventional problems, and has a small hole diameter of 25 mm or less and a depth of 10 times or more of the hole diameter without separately performing a drilling operation and a cleaning operation. Holes can be formed in concrete structures, and even if there are cracks in the holes, the cracks are not clogged with chips, and the cracks in the holes can be reliably inspected and repaired. It is an object to provide a deep hole forming method, an inspection method thereof, and a repair method thereof.

The deep hole forming method for a concrete structure according to the present invention has the following procedure in order to solve the problem.
A method for forming a deep hole in a concrete structure in which a deep hole having a hole diameter of 25 mm or less and a depth of 10 times or more of the hole diameter is formed in a concrete structure by a deep hole drilling machine. The first step of fixing the base to the work surface of the concrete structure, and the shaft of the drilling tool attached to the tool rotation drive mechanism that moves up and down along the pillar of the deep hole drilling machine at a position near the work surface A second step of rotatably supporting, a third step of supplying cooling water to the tip side of the drilling tool through a flow path formed in the shaft, and a concrete that becomes the work surface by the drilling tool A fourth step of sucking and discharging suspended water in which the supplied cooling water and concrete grinding powder are suspended from a liquid reservoir surrounding the periphery of the hole on the work surface when forming a deep hole in the hole; and Filtered suspension water With circulating to supply as the cooling water, saw including a fifth step, the forming the deep holes corresponding to the length of the shaft to the work surface,
In the second step, the support column provided on the base so as to be inclined at a predetermined angle is fixed at a position inclined according to the inclination angle of the deep hole, and the shaft can be rotated at a position near the work surface. A cylindrical guide bush is inserted into the inclined shaft as the support column is inclined, and the shaft is rotatably held by the guide bush. The procedure includes detachably supporting the tool guide mechanism installed on the liquid reservoir (Claim 1).

By such a procedure, in the deep hole forming method of the concrete structure, the shaft of the drilling tool is rotatably supported in the vicinity of the work surface. Therefore, even if the shaft is used for a drilling tool of 25 mm or less. Shaft shakiness can be suppressed, and when drilling is performed, cooling water is supplied to the drilling tool through a flow path in the shaft. Therefore, the cooling water will be sprinkled on the side wall of the hole dug by the rotating drilling tool, and when the ground concrete shaved is mixed and suspended in the cooling water, there is a crack in the hole There is no clogging of the cracks. And in this method of forming a deep hole in a concrete structure, when the work surface is a horizontal surface or a vertical surface, a support base inclined at a predetermined angle by a support pin is fixed to a fixed base, and the work surface is fixed to the work surface. On the other hand, a deep hole having a predetermined angle can be formed.

  Further, in the method for forming a deep hole in the concrete structure, after the fifth step, a tool rotation driving mechanism that rotates the shaft is temporarily stopped, and the sixth step of removing the shaft from the tool rotation driving mechanism; A seventh step of connecting one end of an extension shaft for extending the shaft to the shaft and attaching the other end of the extension shaft to the tool rotation drive mechanism, and repeating the fifth step to the seventh step And an eighth step of forming the deep hole (claim 2).

  With such a procedure, in the method for forming a deep hole in a concrete structure, the shaft is rotatably supported in the vicinity of the work surface, and the drilling operation is performed by adding an extension shaft. Deep holes can be formed.

And the inspection method of the concrete structure which concerns on this invention is the 1st step-the 5th step, or the 1st step-the 8th step by the deep hole formation method of the concrete structure of Claim 1 or Claim 2. A deep hole is formed by the above, and after the fifth step or the eighth step, the cooling water is supplied to the formed deep hole and the suspension water is sucked into the formed deep hole for a predetermined time to perform a circulation cleaning operation. A circulating cleaning step, and an inner view in which the drilling tool is removed from the formed deep hole together with the shaft or the drilling tool together with the shaft and the extension shaft and connected to the end of a long cord. An endoscope insertion step of inserting a mirror or a scanner into the deep hole formed in the work surface, and an observation image displayed by the endoscope or scanner. An observation step of observing the observation display device having a connected display monitor to the long code, and the procedure including (claim 3). In the concrete structure inspection method according to the present invention, when the deep hole is inclined with respect to the work surface, the work is held by the tool guide mechanism via the bush guide rotatably supported by the shaft. It is supposed to be supported near the surface.

  With such a procedure, in the method for inspecting a concrete structure, when forming a deep hole, a flow of cooling water is generated in the hole by supplying cooling water and sucking suspended water, and the target In the stage where the deep hole is formed, cooling water is further supplied and circulated in the hole with cooling water for a predetermined time. Therefore, since the concrete dust does not clog the irregularities or cracks on the wall surface of the deep hole, when observing with an endoscope, the state of the wall surface of the deep hole is properly observed to check for cracks, etc. it can.

The concrete structure repairing method according to the present invention is formed from the first step to the fifth step or from the first step to the eighth step by the concrete structure deep hole forming method according to claim 1 or claim 2. A method for repairing a concrete structure in which a repair is performed after performing an inspection method according to claim 3 , wherein an endoscope or a scanner is inserted into the deep hole to inspect defects in the deep hole. In the observation step, if a defect is found inside the concrete in the deep hole in the observation step, fill with a cracking internal modifier that penetrates and modifies the concrete and then fills with the filling material The filling step is further performed (claim 4 ). In the concrete structure repair method according to the present invention, when the deep hole is inclined with respect to the work surface, the work is held by the tool guide mechanism via the bush guide rotatably supported by the shaft. It is supposed to be supported near the surface.

  By such a procedure, in the repair method of a concrete structure, when forming a deep hole, a flow of cooling water is generated in the deep hole by supplying cooling water and sucking suspended water, and the purpose is When the deep hole is formed, cooling water is further supplied, and the inside of the hole is circulated and washed with the cooling water for a predetermined time. Therefore, since the concrete dust does not clog the irregularities or cracks on the wall surface of the deep hole, defects inside the deep hole can be inspected with an endoscope image, and if there is a defect, the crack internal modifier After that, the deep hole is backfilled with the filling material.

In the repair method of the concrete structure according to claim 4, when the occurrence of cracks on the surface of the working surface of the concrete structure has been discovered, along with further formed one end the deep hole along the cracks In the filling step, a seal that discontinuously seals the surface of the crack at a predetermined interval from one end of the crack corresponding to the position where the deep hole is formed, and forms a seal part and a non-seal part in the crack An installation step and a filling material step of filling the deep hole with the filling material and filling the filling material until the filling material is discharged from a non-seal portion adjacent to the seal portion to the surface. The deep holes are formed at predetermined intervals along the crack, and the step of installing the seal and the step of filling material are performed in the crack It was sequentially performed from one end to the other end of the crack along the (claim 5). Further, when the work surface in the seal installation step is an inclined surface or a vertical surface, the deep hole formation, the seal installation step and the filling material step are performed on the lower side of the inclined surface or on the vertical surface. it was decided to carry out sequentially toward the lower side on the upper side of the upper side or the vertical surface of the inclined surface (claim 6).

  According to such a procedure, in the repair method of a concrete structure, in the filling step, the surface of the crack is sealed discontinuously at a predetermined interval from one end of the crack corresponding to the position where the deep hole is formed by the seal installation step. Then, a seal part and a non-seal part are formed in the crack. Then, in the filling material step, the formed deep hole is filled with the filling material, and the filling material is filled until the filling material is discharged to the surface from the non-seal portion adjacent to the seal portion. Then, the seal installation step and the filling material step are sequentially performed from one end portion (lower side) to the other end portion (upper side) of the crack, whereby the crack can be repaired without a gap.

The concrete structure deep hole forming method, concrete structure inspection method, and concrete structure repair method according to the present invention have the following excellent effects.
The method for forming deep holes in a concrete structure is to perform drilling work in a state where the shaft of the drilling tool is rotatably supported in the vicinity of the work surface, and cooling water is supplied from the channel inside the shaft to the drilling tool. To supply. Therefore, even if the shaft is thin, it does not shake during drilling work, and it is possible to form a deep hole in a concrete structure, and the wall of the formed deep hole is generated by supply of cooling water and suction of suspended water. Will be exposed to the flow path. Therefore, when there is a crack or the like on the wall surface of the deep hole, the deep hole can be formed in a state where the concrete shavings are not clogged.

  Moreover, since the deep hole formation method of a concrete structure adds an extension shaft and performs a drilling operation, when the hole diameter is 7 to 25 mm, a deep hole with a depth of 1 to 5 m is currently formed. It is also possible to form a hole deeper than 5 m. Even when the deep hole is formed at a predetermined angle with respect to the work surface, the shaft is tilted at a position near the work surface so that it can be freely rotated, so it is formed in the same way as a deep hole in the vertical direction. It becomes possible to do.

  In the concrete structure inspection method, the wall of the formed deep hole is exposed to the flow path generated by the supply of cooling water and suction of suspended water, so there is no clogging when cracks etc. exist It can be observed with an endoscope. Therefore, the state of the concrete structure can be accurately observed from the state of the wall surface of the deep hole.

  As for the repair method of concrete structures, when cracks are generated when deep holes are formed, deep holes can be formed without clogging the cracks. The modifier can be filled and then filled with the filler material to reach it. In addition, when a crack internal modifier is put in a deep hole, a deep hole with a small diameter that does not impair the strength of the concrete structure can be formed, so it can be modified from the surface of the concrete structure to a deep position. .

  In the concrete structure repair method, in the filling step, the seal installation step and the stage filling step are sequentially performed from one end (lower side) to the other end (upper side) of the crack. The concrete structure can be repaired and modified along the cracks.

BEST MODE FOR CARRYING OUT THE INVENTION A best mode for carrying out a method for forming a deep hole in a concrete structure, an inspection method thereof, and a repair method thereof according to the present invention will be described below with reference to the drawings.
FIG. 1 is a flowchart showing an example of a procedure of a deep hole forming method, an inspection method and a repair method, FIG. 2 is a perspective view showing an example of a deep hole drilling machine used in the deep hole forming method, and FIG. FIGS. 4A and 4B are longitudinal sectional views showing an example deep hole drilling machine used in the deep hole forming method, and FIG. 4 shows a tool guide mechanism of the deep hole drilling machine used in the deep hole forming method. FIG.

As shown in FIG. 1, the deep hole forming method SA of the concrete structure includes a deep hole in the concrete structure by the first step S1 to the fifth step S5 or by the first step S1 to the eighth step S8. Form.
In the first step S1, the base 11 of the deep hole drilling machine 100 is fixed to the work surface 10 to be inspected or repaired on the concrete floor surface of the concrete structure. In addition, when fixing the base 11, when fixing by vacuum suction, or when fixing by an anchor bolt, it is fixing via fixing means.

As shown in FIGS. 2 to 4, the deep hole drilling machine 100 used in the deep hole forming method SA includes a base 11 disposed on the work surface 10, and a column 14 provided on the base 11. The support mechanism 40 for the support 14, the guide member 15 that moves along the support 14, the tool rotation drive mechanism 16 that is held by the guide member 15 and attaches the rotary tool 17, and the tool rotation drive mechanism 16 is guided to the guide member. A lifting mechanism 50 that moves up and down along the support column 14 via the support base, a guide base 60 that moves up and down along the base 11 at a position adjacent to the base 11, and a work surface along the guide base 60. The tool guide mechanism 30 that moves in parallel has a basic configuration.
Hereinafter, the configuration of the deep hole drilling machine 100 will be described first.

  As shown in FIGS. 2 and 3, the base 11 has a recess 11a formed in a concave shape on the bottom surface thereof, a frame 11b attached to the top of the recess 11a, and an elastically deformable provided so as to surround the recess 11a. The vacuum pad 12 is provided. And the recessed part 11a is connected to the vacuum suction device 13 through the flexible hose 12b to the conduction hole 12a drilled through the base 11. Therefore, the base 11 can maintain airtightness even on a workpiece having an uneven surface like concrete. Moreover, the recessed part 11a has the fixing bolt 11d erected upward on the upper surface of the substantially center.

  The frame 11b is integrally provided with a fixing mechanism 40 that supports the lower end portion of the support column 14 with a pin on the upper surface thereof so as to be tilted. The frame 11b is placed so as to be movable with respect to the recess 11a. That is, the frame 11b has a long hole 11c formed at a position corresponding to the fixing bolt 11d provided upright in the recess 11a. When the fixing bolt 11d is engaged with the long hole 11c, the frame 11b extends along the long hole 11c. It is configured to be movable. The recess 11a and the frame 11b are fixed by fastening a nut 11e and a fixing bolt 11d.

The fixing mechanism 40 for fixing the support column 14 at a predetermined angle includes a pair of fan-shaped angle indexing plates 41 and 41, and a fixing bolt 43 provided in an arcuate arc groove 42 formed on the angle indexing plates 41 and 41. It has.
And the support | pillar 14 is arrange | positioned between the angle index plates 41 and 41 provided on the flame | frame 11b, and it penetrates through the angle index plates 41 and 41, and it supports it at a predetermined inclination angle by the pin (support shaft) 14a. It is supported so that it can be freely set, and is configured to be fixed at a predetermined inclination angle by a fixing bolt 43. The column 14 is formed in a metal hollow rectangular hollow body shape, and a rack 14c which is a part of the lifting mechanism 50 is provided on a column surface, and a guide member 15 on which a tool rotation driving mechanism 16 which will be described later is mounted moves. It is configured to freely slide (move).

  As shown in FIG. 2, the support column 14 may include a base column 14A and a rotation column 14B that rotates around the column axis above the base column 14A via a connecting means 14C. . The support column 14 is provided with the rotation support column 14B, so that when the drilling operation is performed and the shaft 17b of the rotary tool 17 is replaced with a long one or when the shaft 17b is extracted from the hole, the tool rotation drive mechanism 16 of the guide member 15 is used. The shaft 17b can be easily taken out by moving from right above the hole forming the.

  As shown in FIGS. 2 and 3, a pinion 51 that meshes with a rack 14 c provided on the column 14 is provided inside the guide member 15 as a part of the lifting mechanism 50. Here, the elevating mechanism 50 includes a rack 14 c provided on the support column 14, a pinion 51 that meshes with the rack 14 c, and a handle 21 for operating the pinion 51.

  The guide member 15 has a space for accommodating the pinion 51, a housing portion formed so as to slide against the other pillar surface of the support column 14 on which the rack 14c is not formed, and the housing portion. And an installation portion for continuously installing the tool rotation drive mechanism 16 in a detachable manner. As shown in FIGS. 2 and 3, a water supply chamber 18 of a water supply / drainage device 20 to be described later can be installed at a predetermined position where the tool rotation drive mechanism 16 is held by the guide member 15. Note that a butterfly bolt (not shown) can be screwed into the guide member 15 and pressed against the support column 14 to fix the movement of the guide member 15.

  The tool rotation drive mechanism 16 includes a motor 16a and a tool grip 19 provided continuously on a drive shaft 16b (see FIG. 9) of the motor 16a. When the shaft 17b of the rotary tool 17 is held by the tool gripping portion 19, the position of the water supply hole 17e formed through the side surface of the held shaft 17b is located in the water supply chamber 18. So that it is held.

  The rotary tool 17 includes a shaft (shaft portion) 17b gripped by the tool gripping portion 19 and a drilling tool 17a provided detachably at the tip of the shaft 17b. The rotary tool 17 is formed with a screw so that the drilling tool 17a can be screwed to the tip of the shaft 17b. Further, the rotary tool 17 is formed with a through hole 17c for guiding the cooling water to the blade edge, and the cooling water sent from the water supply / drainage device 20 to be described later enters the water supply chamber 18 from the pump 24 in the water supply / drainage device 20 by the supply hose 22a. Via the hole 17e (refer FIG. 3) and the through-hole 17c which were provided in the shaft 17b side surface, it is made to supply to the front-end | tip of the rotary tool 17. FIG. Further, as the drilling tool 17a, for example, a diamond drill bit or a long drill brazed with a hard metal is used, and an example thereof will be described with reference to FIG.

  As shown in FIG. 4, the drilling tool 17a includes a rotating shaft 7a that is hollow and has a flow path 7g, and a grinding portion 7b that is attached to the tip surface of the rotating shaft 7a and has a groove 7c that communicates with the flow path 7g. And. And the groove part 7c is formed from a front end surface to a base end surface by the depth containing the central axis of the said grinding part 7b so that at least one part of the circumference of the cross section orthogonal to the axial direction of the grinding part 7b may be open | released. ing. Further, in the vicinity of the base end surface of the groove portion 7c, when viewed from the distal end surface of the grinding portion 7b, a protruding portion 7d that protrudes into the groove portion 7c from the bottom of the groove portion 7c to a height that hides the flow path 7g of the rotating shaft 7a. have. The protrusion 7d has an inclined surface 7e that is inclined toward the flow path 7g on the base end surface side. In addition, since cooling water is supplied to the drilling tool 17a from the flow path 7g through the protrusion 7d, the cooling water is showered in the circumferential direction of the hole wall surface (see FIG. 5A). The hole wall cleaning operation can be sufficiently performed together with the deep hole formation.

  As shown in FIGS. 1 and 2, the guide base 60 is provided so as to be movable in the vertical direction along the dovetail groove 14 d provided in the base 11. The guide base 60 includes a tool guide mechanism 30 that can move horizontally along a guide surface that is horizontal (parallel to the work surface) of the guide base 60 at the center thereof. Moreover, as shown in FIG. 3, the tool guide mechanism 30 is formed at a height that protrudes downward from the guide base 60, and is formed so that the lower end portion is in contact with the floor surface. The guide base 60 can be moved up and down by the dovetail groove 14d so that the work can be performed even if there is a step on the work floor.

  As shown in FIGS. 1 and 4, the tool guide mechanism 30 is provided with guide pins 30c and 30c with bolts to be guided along linear guide grooves 38 and 38 formed on both ends of the guide base 60, The tool guide mechanism 30 is fixed to the guide base 60 by tightening the wing nuts 30d, 30d.

  The tool guide mechanism 30 is rotatably fitted to a tool guide base 31, a spherical guide member 32b (see FIG. 4) fitted to the tool guide base 31, and a spherical portion of the spherical guide member 32b. A spherical bearing 32 a to be inserted, a tool guide member 32 fitted to the spherical bearing 32 a and provided with a bush hole 33 in the center, and a bush hole 33 of the tool guide member 32 are detachably attached to the rotary tool 17. The guide bush 52 that guides the shaft 17b and the fixture 39a that fixes the guide bush 52 are provided. The tool guide mechanism 30 guides the shaft 17b of the rotary tool 17 in the drilling direction by rotatably supporting the shaft 17b near the work surface 10 which is a concrete floor surface.

  The tool guide base 31 has a recess 31a (see FIG. 4) at the center. Therefore, the suspended water mixed with the concrete powder that has been cut is temporarily pooled in the drainage chamber 37 formed by the recess 31a and returned to the water supply / drainage device 20 via the drainage hose 22b. The returned suspended water is filtered by a filter in the water supply / drainage device 20 and is used again as cooling water.

  As shown in FIG. 4, the tool guide base 31 is provided with a spherical guide member 32b provided at the center of the tool guide base 31, and a spherical surface that is rotatably inserted into the spherical portion of the spherical guide member 32b. The bearing 32a is supported in a tiltable manner. And the spherical bearing 32a fits and supports the tool guide member 32 which provided the bush hole 33 in the center part. A guide bush 52 having a guide hole 52 a for guiding the shaft 17 b of the rotary tool 17 is detachably attached to the bush hole 33 of the tool guide member 32. Further, the guide bush 52 is installed so as to be pressed from the side surface (upper surface) by the fixture 39 a and fixed to the tool guide member 32. The fixture 39a is, for example, an eccentric bolt, and is configured to be eccentric and press the upper surface of the guide bush 52 when the bolt head tightens the bolt.

  Here, the tool guide member 32 is formed by concentrically forming annular members having different diameters, and a spherical guide member 32b and a spherical surface are formed from the outside to the inside of the through hole at a through hole portion provided at the center. The bearing 32a and the guide bush 52 are configured to be installed. The spherical bearing 32a is installed so as to be tilted by being pivotally supported by bolts 35, 35 from the left and right. Rings 35a and 35a are provided around the bolts 35 and 35, and a scale 35b indicating an angle is provided on the peripheral surfaces of the rings 35a and 35a. A moving lever 34 is provided on the upper surface of the ring 35a via a bolt 36.

With such a configuration, as shown in FIG. 4, the spherical bearing 32 a can be pressed with the screws of the bolts 35 and 35 to fix the inclination angle. The tool guide mechanism 30 is used when the moving lever 34 is lifted by hand to move in the horizontal direction and when the angle of the spherical bearing 32a is adjusted. When the angle of the spherical bearing 32a is adjusted, the bolt 35 is loosened, the moving lever 34 is lifted, and the scale 35b attached to the ring 35a is aligned with the pointer 35c. The tool guide base 31 has its tilt position fixed by a bolt 35 when the tool guide member 32 is set at a predetermined tilt angle.
The installation position of the bolt 35 is preferably a position where the tool guide base 31 can be operated from the outside regardless of the position where the tool guide base 31 moves along the linear guide grooves 38, 38 of the guide base 60.

  As shown in FIGS. 2 and 4, a rectangular guide plate 30f is mounted on the cylindrical portion of the upper part of the tool guide base 31, and the guide plate 30f and the tool guide base 31 are fastened at four locations with bolts 30g. Two guide pins 30c with bolts are fixed to the left and right upper surfaces of the guide plate 30f, respectively. The guide pins 30c, 30c with bolts are respectively inserted into the linear guide grooves 38, 38 provided in the guide base 60, and are linearly guided. When the guide plate 30f to which the tool guide base 31 is attached is fixed to the guide base 60, the wing nut 30d is tightened.

  As shown in FIG. 4, the tool guide base 31 includes a concave portion 31a formed in a concave shape on the bottom surface thereof, and an elastically deformable ring-shaped sponge 31g provided so as to surround the concave portion 31a. And as shown in FIG. 3, the recessed part 31a is connected to the conduction hole 22c which penetrated the tool guide base 31 via the drainage hose 22b which is a flexible hose. Therefore, the tool guide base 31 can maintain airtightness even on a workpiece having an uneven surface like concrete.

  As shown in FIG. 4, the guide bush 52 is previously formed with a guide hole 52 a for fitting the shaft 17 b of the rotary tool 17 at the center. The diameter of the drilling tool 17a is formed larger than the guide hole 52a. Therefore, the guide bush 52 is fitted in a state where the drilling tool 17a is removed from the shaft 17b, and is fitted in the bush hole 33 of the tool guide member 32 in a state where the guide bush 52 is fitted to the shaft 17b. The guide bush 52 installed on the tool guide member 32 is pressed and fixed by a fixture (eccentric bolt) 39a. The fixing tool is attached to the upper surface of the tool guide member 32, thereby pressing the side surface of the guide bush 52 with a part of the fixing tool to fix the guide bush 52. The diameter of the drilling tool 17a is smaller than the diameter of the guide hole 52a.

  The tool guide member 32 may set an inclination angle independently, or may set an inclination angle in conjunction with the rotary tool 17 side. When the tilt angle is set independently, the tool guide member 32 is moved along the guide base 60 via the moving lever 34, and the tilt angle is set by aligning the pointer 35c with the scale 35b of the ring 35a. Tighten and fix.

  When setting the inclination angle of the tool guide member 32 in conjunction with the rotary tool 17 side, a guide shaft (not shown) thicker than the shaft 17b of the rotary tool 17 is used. That is, with the shaft 17b fitted with a long guide shaft (not shown) having the same diameter as the bush guide, the column 14 is operated (from the state shown in FIG. 3 (a) to the state shown in FIG. 3 (b)). To set).

  Next, a configuration of an example of the water supply / drainage device will be described with reference to FIGS. 2 and 3. As shown in FIGS. 2 and 3, the water supply / drainage device 20 supplies cooling water to the rotary tool 17 via the supply hose 22 a and the water supply chamber 18, and the drainage chamber (reservoir) 37 of the tool guide base 31. The sewage collected in the water is returned to the water supply / drainage device 20 through the drainage hose 22b, filtered and recirculated as cooling water. This water supply / drainage device 20 is provided with a filtration mechanism such as a pump 24 and a filter (not shown) in the device main body, and it is possible to supply the cooling water and filter the wastewater without submerging the work site. .

  The water supply / drainage device 20 supplies cooling water to the water supply chamber 18 and forcibly sucks it from the drainage chamber 37. Therefore, the cooling water circulates from the water supply / drainage device 20 between the supply hose 22a, the water supply chamber 18, the hole 17e, the through hole 17c of the rotary tool 17, the drilling tool 17a, the deep hole, the drainage chamber 37, and the drainage hose 22b. Thus, the concrete dust cut by the drilling tool 17a is sent upward from between the formed deep hole shaft 17b and the side wall of the deep hole h as suspension water mixed with the cooling water, and the drainage chamber 37. Is sucked in the state accumulated in the water, sent to the water supply / drainage device 20 through the drainage hose 22b, and filtered by a filter or the like (not shown).

  An example of the observation display device will be described with reference to FIG. As shown in FIGS. 6 and 5C, the observation display device 3 is, for example, a notebook personal computer (notebook personal computer), and can be connected to the observation display device 3 by USB (Universal Serial Bus) 2.0 or the like. An endoscope (camera or scanner) 3a connected to the tip of the long cord 3b, a display monitor 3c for displaying an image or image from the endoscope 3a, and an image or image displayed on the display monitor 3c. Storage means 3d for storing and input means 3e such as a mouse or a keyboard are provided. Note that a bar-shaped scanner may be connected instead of the endoscope 3a, and an image read by the scanner may be displayed on the display monitor 3c. Since the state of the inner wall of the deep hole h is displayed on the display monitor 3c, the observation display device 3 visually observes the presence or absence of cracks CK on the inner wall of the deep hole h and the presence or absence of “sole” formed on the inner wall. Can be inspected and the presence or absence of defects can be determined.

  Furthermore, the filling device for filling the filling material into the deep hole after inspecting the inside of the deep hole is not particularly illustrated, but an inorganic blast furnace slag cement which is an inorganic material, an epoxy resin injecting agent, an acrylic resin injecting agent, etc. A common device that can be filled by pumping into the hole is used. A device having a general structure is also used for injecting a cracking internal modifier for reforming concrete by infiltrating the inside of the formed deep hole into the concrete. In addition, as a crack internal modifier, lithium nitrite, a water glass type material, a silane type material, a silane siloxane type material etc. are used, for example.

Next, in the deep hole forming method SA, the steps of the deep hole forming method SA, the inspection method SB, and the repair method SC using the deep hole drilling machine 100 and the water supply / drainage device 20 described as an example are shown in FIG. 1 and 7 will be mainly described with reference to FIGS.
<Deep hole formation procedure>
(1) The deep hole drilling machine 100 is temporarily placed in a specified hole position on the work surface 10 of the concrete structure so that the tip of the tool is aligned.
(2) The vacuum suction device 13 is operated to fix the base 11 to the work surface 10 (first step S1).

(3) Loosen the fixing bolt 11d provided on the frame 11b on the base 11, move the frame 11b, and adjust the tool tip position (see FIG. 3A).
(4) The tool guide mechanism 30 is moved to the designated hole position by the linear guide groove 38 of the guide base 60 to perform centering.
(5) The tool guide mechanism 30 is fixed with the wing nut 30d. At this time, when the deep hole is inclined, the tool guide member 32 is inclined at a predetermined angle and fixed with the bolt 35. The tool guide member 32 can set an accurate inclination angle by aligning the scale 35b with the pointer 35c (see FIGS. 3A, 3B, and 4).

(6) Remove the drilling tool 17a at the tip of the shaft 17b and attach the drilling tool 17a with the guide bush 52 inserted through the shaft 17b. The drilling tool 17a used here is a size that can be formed with a hole diameter of 7 mm or 9 mm (see FIG. 4).
(7) Operate the handle 21 so that it is positioned directly above the tool guide member 32, insert the guide bush 52 into the bush hole 33 of the tool guide member 32, and fix it with a fixture (eccentric bolt) 39a. Thus, the shaft 17b is rotatably supported in the vicinity of the work surface 10 (second step S2) (see FIG. 5A).

(8) The motor 16a of the tool rotation drive mechanism 16 is driven to rotate the rotary tool 17. At the same time, the pump 24 of the water supply / drainage device 20 is operated to supply cooling water to the tip side of the drilling tool 17a of the rotary tool 17 (third step S3) (see FIGS. 5A and 5B).
(9) The cooling water is sent from the supply hose 22a to the water supply chamber 18 by the pump 24, and the cooling water sent into the water supply chamber 18 is drilled from the hole 17e of the shaft 17b through the through hole 17c of the shaft 17b. It is sent to the tool 17a to supply cooling water to the work position.

(10) The drilling tool 17a is fed toward the work surface 10 while operating the handle 21 to feed.
(11) When drilling of the work surface 10 is started, the suspended water mixed with concrete dust and cooling water is sent out from the hole and collected in the discharge chamber (liquid reservoir) 37 surrounding the hole and forced by the water supply / drainage device 20 Are sucked and sent to the water supply / drainage device 20 (fourth step S4).
(12) If the length of the shaft 17b is, for example, 50 cm to 1 m, a deep hole is formed in the length of the shaft 17b (fifth step S5).

At this time, the suspended water mixed with the concrete powder discharged by drilling with the drilling tool 17a is again supplied from the drainage chamber 37 of the tool guide base 31 by the pump 24 of the water supply / drainage device 20 through the drainage hose 22b. It is sent back to the water supply / drainage device 20. Then, the recovered suspended water is filtered by the filter in the water supply / drainage device 20 and is recirculated and used again as cooling water.
Further, when the drilling tool 17a forms the deep hole h in the work surface 10 of the concrete structure, the shaft 17b is guided near the work surface 10 by the guide bush 52, so that the drilling tool 17a can swing. And can be cut stably.

  Here, the vicinity position of the work surface 10 means within 10 cm from the work surface, the preferable position means within 5 cm from the work surface 10, and the most preferable position means within 3 cm from the work surface. Further, the shaft 17b can be guided at a position equal to or deeper than the work surface by forming an installation hole having a depth in which the tool guide mechanism 30 or the tool guide base 31 is buried in the work surface. It is possible to set the position near the work surface. In other words, the position near the work surface means a position close to the top and bottom (for example, +10 cm to −10 cm with respect to the reference 0) with the work surface as the reference 0. In the deep hole drilling machine 100 described with reference to FIGS. 2 and 3, when the installation hole is formed, the tool guide mechanism 30 and the like are removed from the guide base 60 (see FIG. 4), and FIG. As shown in a) and (b), the tool guide mechanism 30 is fixed to the installation hole in the frame body F, and the frame body F is fixed to the work surface with bolts or the like.

(13) When the predetermined processing depth is reached, the tool rotation drive mechanism 16 is stopped (or without being stopped and fed by the handle 21), and the water supply / drainage device 20 is continuously operated to supply cooling water. Then, the suspension water is sucked, and the circulation washing operation is performed until the suspension water in the formed deep hole h is purified (circulation washing step S9). Whether suspended water has been purified is determined to have been purified, for example, by performing a circulating operation for 1 to 3 minutes at a preset time, or an operator can remove the turbidity visually. It is good also to judge that it was.
(14) When the circulation work is finished, the water supply / drainage device 20 is stopped, the rotary tool 17 is extracted from the work surface 10 of the concrete structure, the deep hole formation is finished, and the deep hole cleaning work is finished.

  (15) When the deep hole forming operation is completed, an endoscope or a rod-shaped scanner connected to the tip of the connection cord is then inserted into the formed deep hole h (endoscope insertion step S10). (See FIGS. 5C and 6) When the endoscope or scanner is slowly inserted into a deep hole and lowered, the video or image captured by the scanner through the endoscope is displayed on the display monitor 3c. The condition of deterioration of the concrete structure such as cracks is visually observed (observation step S11). For example, in the image projected on the display monitor 3c, if a crack CK or a large gap is visually recognized on the wall surface, it is determined as a defect (inspection) (inspection method SB).

  Note that it is desirable that the endoscope or the scanner has a configuration in which a light such as an LED that illuminates the interior together with the camera or the sensor is installed. The observed image is displayed as an image on the display monitor 3c as shown in FIG. 6, for example, so that the state in the deep hole h can be observed well. Incidentally, the upper image in FIG. 6 shows a state in which the inside of the deep hole h is photographed from the top to the bottom, and the lower image in FIG. 6 shows a state in which the side wall of the deep hole h is photographed. A state in which CK is formed is shown.

  Further, deep holes h are formed at a plurality of positions of the concrete structure, and the position of the image of the concrete structure is input by the input means 3e so as to be related to the image, and the storage medium etc. It is also possible to store them in the storage means 3d. By performing the inspection work for each floor or wall surface of the concrete structure, and performing the inspection work at a plurality of locations in the entire concrete structure, it is possible to grasp the entire deterioration state of the concrete structure.

(16) When the inspection operation or the observation operation is completed, a filling operation for filling the formed deep hole with a filling material is performed (filling step S12).
(17) For the filling operation, the inserted endoscope or scanner is first extracted. Then, a filling hose for filling the deep hole with the inorganic material as the filling material (or crack internal modifier) is inserted, and a hole is formed so that no gap is formed between the outside of the filling hose and the deep hole. It shall be in the state which attached packing, such as cloth or rubber. Then, the inorganic material is filled into the deep hole by pumping the inorganic material from the filling hose (see FIG. 7D). When the deep hole h is formed and there is no abnormality such as crack CK in the internal state, the deep hole h is repaired by the back hammering method in which the filling hose is inserted and filled back to the bottom of the deep hole h. It is preferable to carry out.

(18) When crack CK can be confirmed on the work surface, as shown in FIG. 7C, a seal covering the surface of the crack CK intermittently (discontinuously) from one end of the crack CK. A seal installation operation for installing the part se (se1, se2,...) And the non-sealed part ns is performed (seal installation step S13) (see FIG. 7C).
(19) Then, the filling hose is inserted into the deep hole h formed at the position corresponding to the seal portion se (se1) which becomes one end of the crack CK, and the packing is attached between the filling hose and the deep hole, and the filling is performed. Fix the hose in the deep hole h. Further, the inorganic material is pumped and filled from the filling hose, and the filling operation is performed until the filled inorganic material overflows from the non-seal portion ns (ns1) adjacent to the seal portion se (se1) (filling material step S14) ( (Refer FIG.7 (d)).

  In addition, when the crack CK can be confirmed on the surface, the depth and scale of the crack CK are confirmed by forming a deep hole h along the crack CK at a position spaced from the crack CK at a predetermined interval. When repairing the crack CK, the filling hose is fixed to the opening of the formed deep hole h and filled with a filling material or the like, and the crack CK is used as an air hole, and the above-described operation (FIG. 7 (a) to (d)). In addition, when crack CK penetrates from the front to the back of the concrete structure and backwater pressure is applied from the back, the filling hose is fixed to the opening of the deep hole h to fill the filler. By performing the above-described operation (FIGS. 7A to 7D) on the crack CK passing therethrough, a filler material or the like can be filled into most of the crack CK.

  (20) Thus, as shown in FIG. 1 and FIG. 7, the surface of the concrete structure is obtained by sequentially performing the seal installation step S13 and the filling material step S14 from one end portion to the other end portion of the crack CK. Repairs cracked CK recognized by When the work surface 10 of the concrete structure is an inclined surface or a vertical surface, the depth increases from the lower side of the inclined surface or the lower side of the vertical surface toward the upper side of the inclined surface or the upper side of the vertical surface. By performing the hole formation step (S1 to S5, S9 or S1 to S9), the seal installation step S13, and the filling material step S13, the crack CK is repaired without a gap (repair method SC).

When the work surface 10 is an inclined surface or a vertical surface, a filling material step S14 is performed from the lower side of the inclined surface to the upper side or from the lower side to the upper side of the vertical surface, thereby filling the filled material and the next. It is possible to fill the material with no gap by gravity.
In addition, the formed deep hole may be filled with a crack internal modifier, and then the filler may be filled to close the deep hole. As the crack internal modifier, lithium nitrite, water glass material, silane material, silane siloxane material or the like is used. In addition, as the filling material, inorganic blast furnace slag cement, which is an inorganic material, and epoxy resin injection agent, acrylic resin injection agent, etc., which are materials other than inorganic materials, are used according to the purpose and application of the work. Yes.

  Next, the case where the shaft 17b of the rotary tool 17 uses the extension shaft 17L and the engagement shaft 17K as shown in FIGS. 8 and 9 will be described. 8 (a) and 8 (b) are exploded perspective views showing the configuration of a rotary tool using a water supply mechanism and an extension shaft in an example deep hole drilling machine used in the deep hole forming method, and FIGS. 9 (a) and 9 (b). ) And (c) are cross-sectional views schematically illustrating a state in which a shaft of a deep hole drilling machine is added in the deep hole forming method. In addition, the member of the same code | symbol already demonstrated shows the same structure.

  As shown in FIG. 8, the rotary tool 17A may include a drilling tool 17a, an extension shaft 17L, and an engagement shaft 17K as the shaft 17b. The extension shaft 17L has screw portions (in this case, male screws and female screws) 17j and 17f provided at both ends thereof, and a through hole 17c is formed through the inside. The engagement shaft 17K has a screw portion 17g (here, a female screw) that engages with the tool gripping portion 19 at one end and a screw portion 17h (here, a male screw) that engages with the screw portion 17j of the shaft 17b at the other end. And a through-hole 17c is formed through the inside. This shaft 17b is conveniently used when the deep hole to be formed has a dimension exceeding 100 cm.

  When such an extension shaft 17L is used, as shown in FIGS. 1 and 9, the sixth step S6 to the seventh step S7 are performed between the fifth step S5 and the circulation cleaning step S9. The fifth step S5 to the seventh step S7 are repeated until a deep hole having a predetermined depth is formed (eighth step S8). That is, as shown in FIG. 9A, first, a deep hole corresponding to the length of the engagement shaft 17K is formed from the engagement shaft 17K attached to the tool rotation drive mechanism 16.

  Next, as shown in FIG. 9B, the extension portion of the engagement shaft 17K is removed from the tool rotation drive mechanism 16, and the extension shaft 17L is connected to the tool rotation drive mechanism 16 and the engagement shaft 17K. And as shown in FIG.9 (c), the deep hole in the state which added the length of the extension shaft 17L is formed. 9A, 9B, and 9C are repeated to form a deep hole having a predetermined hole depth. The step corresponding to the state of FIG. 9A is the fifth step S5 of FIG. 1, the step corresponding to the state of FIG. 9B is the sixth step S6 of FIG. 1, and FIG. ) Corresponds to the seventh step S7 in FIG.

  As described above, the deep hole drilling machine 100 has the tool 14 tilting and the tool guide mechanism 30, so that the tilting angle can be freely set from the vertical hole to the inclined hole. It can be carried out. Further, the deep hole drilling machine 100 can operate in a state where the guide bush 52 guides the shaft 17b of the rotary tool 17 in the vicinity of the work surface 10 when drilling a vertical hole or an inclined hole. It can be performed.

  In addition, as explained above, in the deep hole forming method of the concrete structure, the inspection method and the repair method thereof, the configuration of the water supply chamber 18 and the configuration of the tool gripping portion 19A are as shown in FIG. It doesn't matter. That is, as shown in FIG. 8, the engagement shaft 17K and the extension shaft 17L are connected to the drive shaft 16b of the tool rotation drive mechanism 16 from the water supply mechanism 18A which is a water supply chamber using the first connection member 9A and the second connection member 9B. Then, the cooling water may be supplied to the tip side of the drilling tool 17a.

As shown to Fig.8 (a), the water supply mechanism 18A which is the water supply chamber 18 is installed in the support recessed part 15a formed in the position used as the lowest step of the guide member 15 currently formed in step shape here.
The installed water supply mechanism 18 </ b> A is attached such that the hose connection portion 18 b protrudes from the opening 15 c of the guide member 15.

  In this water supply mechanism 18A, as shown in FIGS. 8A and 8B, bearing installation portions 8a and 8b and seal installation portions 8c and 8d are formed stepwise in the cylindrical body 18a. A first oil seal 18c and a second oil seal 18d to be sealed as a supply space, and a first bearing 19k and a second bearing 19m are disposed outside the first oil seal 18c and the second oil seal 18d, and pass through them. In this way, it is configured by a tool gripping portion 19A composed of the first connecting member 9A and the second connecting member 9B.

9 A of 1st connection members are continuously provided in this drill connection part 19c, the bolt head-shaped drill connection part 19c in which the internal thread screwed in the drive shaft 16b of the tool rotation drive mechanism 16 was formed, and the said drill connection A shaft-shaped connecting shaft portion 19d having a diameter smaller than that of the portion 19c.
The second connecting member 9B is formed on one end side of the shaft main body 19e and is formed on the other end side of the shaft main body 19e, and a male screw portion 19f that is detachably screwed to the connecting shaft portion 19d of the first connecting member 9A. A tool connecting portion 19g that is detachably screwed into the connecting portion of the rotary tool, and is provided on the shaft main body 19e at a position closer to the center of the shaft than the tool connecting portion 19g, and is screwed by a wrench or a spanner from the outside. And a communication hole 19j formed on the side surface of the shaft body 19e at a position closer to the center of the shaft than the tool operation portion 19h.

The shaft body 19e is formed with a through hole that continuously penetrates from the communication hole 19j to the tool connection portion 19g. The tool connecting portion 19g is formed with a male screw so that the female screw portion of the rotary tool 17 is screwed onto the outer periphery thereof.
Then, with the tool gripping portion 19A penetrating into the cylindrical body 18a, the first connection member 9A is detachably connected to the drive shaft 16b of the tool rotation drive mechanism 16, and one end side is connected to the first connection member 9A. It attaches so that attachment or detachment is possible, and it is further attached by the 2nd connection member 9B so that the rotary tool 17 may be connected to the other end side.

  In the water supply mechanism 18A, the area surrounded by the first oil seal 18c, the second oil seal 18d, and the cylindrical body 18a becomes a cooling water supply space, and supplies the cooling water around the communication hole 19j of the tool gripping portion 19A. Will be. Then, the cooling water supplied from the water supply chamber 18 is supplied to the drilling tool 17a through the through hole 17c formed through the communication hole 19j of the tool gripping portion 19A in the axial direction of the shaft 17b. Yes.

  Moreover, as a deep hole drilling machine used for this deep hole formation method, it is good also as a structure of the deep hole drilling machine 101, as shown in FIG. In addition, about the structure same as the already demonstrated member, the same code | symbol is attached | subjected and description is abbreviate | omitted. The deep hole drilling machine 101 is different from the configuration of FIG. 2 in that the guide base 60 is arranged in parallel at a position where the direction in which the column 14 inclines and the direction in which the tool guide mechanism 30 moves are opposed. Yes, when the support column 14 is inclined, the moving distance of the tool guide mechanism 30 may be smaller than that of the configuration of FIG.

  Further, the deep hole drilling machine used in this deep hole forming method is not limited to the above-described configuration as long as the shaft can be rotatably supported at a position near the work surface. As long as the wall surface state can be inspected by being inserted into the formed deep hole, it is particularly limited as long as the side wall state can be inspected, such as an ultrasonic transmitter and an infrared sensor other than a camera and a scanner. is not. Any existing drilling tool or filling material or crack internal modifier for filling the formed deep hole may be used.

It is a flowchart which shows an example of the procedure of the deep hole formation method, inspection method, and repair method which concern on this invention. It is a perspective view which shows an example deep hole drilling machine used with the deep hole formation method which concerns on this invention. (A), (b) is a longitudinal cross-sectional view which shows an example deep hole drilling machine used with the deep hole formation method which concerns on this invention. It is a perspective view which shows the tool guide mechanism of an example deep hole drilling machine used with the deep hole formation method which concerns on this invention in a partial cross section. (A), (b), (c) is a schematic diagram which shows an example of the inspection method which concerns on this invention as a cross section. It is a schematic diagram which shows typically the state which observes a deep hole with a display monitor in the inspection method which concerns on this invention. (A), (b), (c), (d) is a schematic diagram schematically showing a deep hole forming method, an inspection method, and a repair method according to the present invention with a work surface as a cross section. (A), (b) is a disassembled perspective view which shows the structure of the rotary tool using the water supply mechanism and extension shaft in an example deep hole drilling machine used with the deep hole formation method which concerns on this invention. (A), (b), (c), (d) is sectional drawing explaining typically the state which adds the shaft of the deep hole drilling machine in the deep hole formation method which concerns on this invention. It is a perspective view which shows the deep hole drilling machine of another example used with the deep hole formation method which concerns on this invention. (A), (b) It is the perspective view and sectional drawing which show the other usage example of the tool guide mechanism used with the deep hole formation method which concerns on this invention.

Explanation of symbols

SA Deep hole forming method SB Inspection method SC Repair method S9 Circulation work steps S1 to S8 First to eighth steps S10 Endoscope insertion step S11 Observation step S12 Filling step S13 Seal installation step S14 Filling material step 7 Drilling tool 7a Rotating shaft 7b Grinding portion 7c Groove portion 7d Protruding portion 7e Inclined surface 7e Inclined surface 7f Different diameter portion 8a Bearing installation portion 8c Seal installation portion 8e Screw hole 9A First connection member 9B Second connection member 11 Base 10 Work surface (concrete structure Surface) 11a Concave portion (fixing means)
11b Frame 12 Vacuum pad 12a Conducting hole 12b Flexible hose 13 Vacuum suction device (fixing means) 14 Support 14A Base pillar 14B Rotating support 14C Connecting means 14D Engaging mechanism 14a Pin 14c Rack 14d Dovetail groove 15 Guide member 15a Support recess 15b Opening 15c Notch groove 15d Fixing screw hole 16 Tool rotation drive part (rotation drive mechanism) 16a Motor 16b Drive shaft 16c Support rod 17 Rotating tool 17a Drilling tool 17b Shaft (shaft part) 17c Through hole 17e Hole 18, 18A Water supply chamber, water supply Mechanism 18a Tube 18b Hose connection 18c First oil seal 18d Second oil seal 19A Tool grip 19d Connection shaft (shaft)
19e Shaft body (shaft) 20 Water supply / drainage device
21 Handle 22a Supply hose
22b Drain hose 24 Pump 30 Tool guide mechanism 30c Guide pin with bolt 30d Wing nut 30f Guide plate 30g Sponge 31 Tool guide base 32 Tool guide member 32a Spherical bearing 32b Spherical guide member 33 Bushing hole 35 Bolt (fixing bolt) 35a Ring 35b Scale 36 Bolt 37 Drainage chamber (Liquid reservoir) 38 Linear guide groove 39a Fixing tool (eccentric bolt) 40 Fixing mechanism 41 Angle index plate (support member) 42 Arc groove 43 Fixing bolt 50 Lifting mechanism 51 Pinion 52 Guide bush 52a Guide Hole 55 Hollow sleeve 60 Guide base 70 Fixed frame 71 Frame body 72 Support frame 73 Connection port 90 Deep drilling guide device 100 Deep drilling machine 101 Deep drilling machine

Claims (6)

A method for forming a deep hole in a concrete structure, wherein a deep hole is formed in a concrete structure by a deep hole drilling machine with a hole diameter of 25 mm or less and at least 10 times the hole diameter,
A first step of fixing a base provided with a pillar of the deep hole drilling machine to a work surface of the concrete structure;
A second step of rotatably supporting a shaft of a drilling tool attached to a tool rotation driving mechanism that moves up and down along the pillar of the deep hole drilling machine at a position near the work surface;
A third step of supplying cooling water to the tip side of the drilling tool through a flow path formed in the shaft;
When forming a deep hole in the concrete to be the work surface with the drilling tool, the supplied cooling water and the suspended water in which the concrete grinding powder is suspended are sucked from a liquid reservoir surrounding the hole on the work surface. And the fourth step of discharging,
With circulating aqueous suspension described above discharged to supply as the cooling water by filtration, seen including a fifth step, the forming the deep holes corresponding to the length of the shaft to the work surface,
In the second step, the support column provided on the base so as to be inclined at a predetermined angle is fixed at a position inclined according to the inclination angle of the deep hole, and the shaft can be rotated at a position near the work surface. A cylindrical guide bush is inserted into the inclined shaft as the support column is inclined, and the shaft is rotatably held by the guide bush. A method for forming a deep hole in a concrete structure, wherein the tool guide mechanism installed on a liquid reservoir is detachably supported . After the fifth step, a sixth step of temporarily stopping the tool rotation driving mechanism that rotates the shaft and removing the shaft from the tool rotation driving mechanism;
A seventh step of connecting one end of an extension shaft for extending the shaft to the shaft and attaching the other end of the extension shaft to the tool rotation drive mechanism;
Repeating the fifth step to the seventh step to form the deep hole;
The method for forming deep holes in a concrete structure according to claim 1, further comprising: In a concrete structure inspection method for inspecting a deep hole formed by the first step to the fifth step or the first step to the eighth step by the method for forming a deep hole of a concrete structure according to claim 1 or claim 2 ,
After the fifth step or the eighth step, a circulation cleaning step for performing a circulation cleaning operation by supplying the cooling water and sucking the suspension water for a predetermined time in the formed deep hole;
An endoscope or a scanner in which the drilling tool is removed from the deep hole formed together with the shaft or the drilling tool together with the shaft and the extension shaft and connected to the tip of a long cord. An endoscope insertion step of inserting into the deep hole formed on the surface;
An observation step of observing an observation image displayed by the endoscope or scanner by an observation display device having a display monitor connected to the long cord;
A method for inspecting a concrete structure, comprising: An endoscope or a scanner is inserted into the deep hole formed from the first step to the fifth step or from the first step to the eighth step by the method for forming a deep hole in a concrete structure according to claim 1 or claim 2. In the repair method of a concrete structure for repair after performing the inspection method according to claim 3 for inspecting a defect in a hole,
Remove the endoscope or scanner inserted into the deep hole, and if a defect is found in the concrete in the deep hole in the observation step, it is filled with a crack internal modifier that penetrates and modifies the concrete. And then further performing a filling step of filling the filling material ,
A method for repairing a concrete structure characterized by comprising: In the repair method of the concrete structure according to claim 4, when the occurrence of cracks on the surface of the working surface of the concrete structure has been discovered, along with further formed one end the deep hole along the cracks ,
In the filling step, a seal is installed that discontinuously seals the surface of the crack at a predetermined interval from one end of the crack corresponding to the position where the deep hole is formed, and forms a seal part and a non-seal part in the crack. Steps,
Filling the deep hole with the filling material and filling the filling material until the filling material is discharged from the non-seal portion adjacent to the seal portion to the surface; and
The deep hole is formed along the crack at a predetermined interval, and the seal installation step and the filling material step are sequentially performed from one end portion to the other end portion of the crack along the crack. Repair method for concrete structures. The method for repairing a concrete structure according to claim 5, wherein when the work surface in the seal installation step is an inclined surface or a vertical surface, the formation of the deep hole, the seal installation step, and the filling material step are performed. A method for repairing a concrete structure, which is performed sequentially from the lower side of the inclined surface or the lower side of the vertical surface toward the upper side of the inclined surface or the upper side of the vertical surface.

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