JPS61277774A - Method for diagnosis of building - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention 1] The present invention facilitates and accurately conducts preliminary investigation of repair work such as lifting of mortar on the back of a building having a finished mortar surface or concrete surface, and various investigations necessary for construction management. The present invention relates to a method of diagnosing buildings that can be implemented in the future.

[Technical Background of the Invention] In general, concrete structures such as buildings have a structure in which a finishing mortar is applied to the surface of the concrete frame, and an external wall covering material such as tiles is attached to the surface. In such buildings, as the finishing mortar ages and cracks occur, it becomes necessary to perform repair work by injecting an epoxy resin adhesive or the like into the exterior of the building.

As a preliminary investigation before carrying out such repair work, we diagnose the necessity of repair, the depth and width of cracks floating on the back of the mortar, and the degree of moisture and carbonation of the non-adhesive surface in order to select an adhesive. There is a need.

The conventional method for diagnosing such buildings is to peel off the tiles near the areas requiring repair (this location is estimated by percussion, etc.) and drill multiple investigation holes with an inner diameter of about 10a1 toward the inside. A so-called core extraction method was used in which the inner surface of the core was inspected visually and repairs were made through the inspection hole as necessary.

[Problems with the background art] However, with such conventional methods, the drilling work is large-scale because the diameter of the investigation hole is large, and it is also difficult to repair the investigation hole after repair. There was a problem. In addition, this kind of building diagnosis is necessary for construction management during building construction in order to discover and prevent poor adhesion and shoddy construction work that could lead to personal injury, but conventional methods do not allow for repairs. For the same reasons as in the case of preliminary investigation of construction,
It was difficult to implement.

[Purpose of the Invention] The present invention has been made in order to solve these conventional difficulties, and it is possible to carry out preliminary surveys for repair work and various surveys necessary for construction management, instead of conducting large-scale surveys that are close to destructive surveys, unlike conventional methods. It can be easily carried out without drilling large diameter holes that are hanging and difficult to repair.
The aim is to provide a method for accurate diagnosis.

[Summary of the Invention] In other words, the present invention involves drilling a survey hole inward from the surface of a building having a finished mortar surface or a concrete surface, and displaying a scale on the inner surface of the survey hole. Repair work such as lifting of the back of the mortar can be carried out by inserting an adapter with a visual window formed along the scale, inserting an endoscope into the adapter, and inspecting the inner surface of the investigation hole through the window of the adapter. Preliminary surveys and various surveys necessary for construction management can be easily and accurately carried out.

[Embodiments of the invention] Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view of a building undergoing diagnosis according to the present invention.

In the figure, this building has a structure in which mortar 2 is applied on a concrete frame 1, and tiles 3 are pasted on top of it, and numeral 4 indicates a floating crack on the back of the mortar that has occurred on the back of the mortar. .

In this embodiment, first, a blind hole 5 is drilled toward the outside and inside using a drill or the like. This blind hole 5 should preferably have an inner diameter of 10 nm or less, and should preferably be located at the joints of the tiles 3, particularly at the intersections 3a of the horizontal joints and vertical joints, as shown in FIG. This is because tile 3 usually has a joint width of 8 to 12n.
This is because the blind hole 5 can be easily repaired, the effect on the construction surface is small, and inspection can be performed virtually non-destructively.

Next, in this blind hole 5, as shown in FIG. 3, an adapter 6 is inserted, which has a cylindrical body with seven flange 6a formed at one end, a window 6b formed in the longitudinal direction, and a scale 6C displayed on the inner surface in the longitudinal direction. , until the inner surface of the flange 6a and the surface of the building are substantially flush with each other. Incidentally, the scale 6C may be formed directly on the inner surface of the adapter 6, or a known tartar scale 7 as shown in FIG. 3 may be attached, for example. Furthermore, this adapter 6 has a flange 6
It is also possible to have a structure in which a strip-shaped scale support piece is fixed to the inner periphery of the flange 6a in parallel with the axis of the flange 6a.

The crank scale 7 shown in Fig. 3 has a scale of 1/1 on one side edge for measuring the depth of cracks from the wall surface.
A depth scale 7a is displayed, and a crack scale 7b showing the crack width in several steps from 0.04 to 1.2011' is displayed at the other end in comparison with the crack.
The depth and width of the crack location can be directly read.

After that, insert the endoscope 8 into this adapter 6.
Then, the inner surface of the blind hole 5 is removed with an internal mirror, and various diagnoses as described below are performed. When inserting inner pA118,
In order to facilitate the focus adjustment so that the lens is always focused on the inner surface of the blind hole, an adjuster 9 is provided which allows the lens 8a to move up and down and rotate concentrically with respect to the side wall of the blind hole 5. It is desirable to fit the adapter 6 into the upper pant.

Naouchi? A well-known borescope is used as the borescope 1118, and a direct view type, a side view type, a front perspective type, etc. are appropriately selected and used. A side-viewing borescope is particularly suitable for the present invention. The camera and light source device set in the endoscope 8 are also selected from known ones as appropriate depending on the purpose and contents of the examination. Incidentally, if a battery is used as a power source for the light source device, the investigation and shadowing work can be facilitated.

Inspection items to which the present invention can be applied will be described below along with methods thereof.

(b) In order to design a tanker bin used for injection adhesive repair of floating tiles and mortar on the back side to effectively fix it to the concrete frame, cracks on the back side of the tile and mortar are recorded with a depth scale 7a as well as an internal error shadow.

(0) To measure and record floating cracks on the back surface of tiles and mortar and to select an injection adhesive, the floating cracks on the back surface of the mortar confirmed with an endoscope are recorded by endoscopic photography along with the crack scale 7b.

(c) Neutralization of concrete framework and mortar is correlated with aging of the framework and mortar adhesion, so pour an alcoholic solution containing 1% phenolphthalein into the blind hole 8 to deepen the bright red border caused by the alkaline reaction. It is recorded by the am shadow of the family celebration along with the scale 7a.

(d) To select the injection adhesive, inject the cobalt chloride mixed reagent powder, and when the bright red reagent powder turns blue, record it with a private photograph.

(e) When a layer of eflotsense is formed on the surface to be adhered, adhesion failure occurs. Efrotuscens is strongly alkaline when wet, but neutral when dry, so using this property, pour a 1% alcohol solution of phenolphthalein into the blind hole 8, and observe the bright red white layer that does not react with alkali using an endoscope. Record by taking pictures.

(f) Adhesion failure occurs on the surface to be adhered due to mold, mud, etc.

Abnormal color of mold and mud should be recorded by internal inspection (II) when light brown color changes to blackish brown due to negligence.

(G) Pinning after construction In order to confirm whether the injection adhesive bottle is effectively fixed to the concrete structure, the position on the surface is confirmed with a metal detector, and then the blind hole is drilled along the bottle. The tips of the tiles and floating cracks on the back of the mortar are recorded by endoscopic photography along with the depth scale 7a.

(h) When water is present, general-use epoxy resin adhesives react with water and become cloudy, causing poor adhesion, and even wet-use epoxy adhesives have a reduced adhesive strength. In addition, adhesion strength decreases due to poor cleaning of concrete dust and dirt. These will be recorded using the Uchigi IA11N shadow.

(S) If there is concrete dust in the injection port, it will cause a failure in filling the injection material or in fixing the anchor properly, so record the dust cleaning status of the epoxy injection port using endoscopic photography.

(v) Drill blind holes at every unit distance from the injection port and confirm the injection range of the adhesive for back surface floating crack injection using an endoscope.

(l) Drill the aforementioned investigation holes along the cracks that have occurred on the surface;
Internal viewing with depth scale 7a! 11! Record by shadow.

(E) To measure the actual effect and depth of permeable waterproofing materials, water repellent materials, etc., apply the permeable waterproofing materials, water repellent materials, etc., make blind holes after drying, and dilute with water aqueous red. The ink liquid is poured into the impregnated area of the permeable waterproof material, water-repellent material, etc., and the colored boundary is recorded by endoscopic photography along with the depth scale 7a, taking advantage of the property that the water-based red ink does not color the impregnated area.

(W) Other causes include interfacial peeling cracks at areas where concrete defects have been repaired, condensation water on the concrete on the back of the elastic finishing material, water content due to infiltrating water, floating cracks on the back side of mortar, moisture on the bonded surface, condensation water on the back side of areas where concrete defects have been repaired, and water content due to intrusion water. Moisture status, floating cracks on the back of mortar Wetness of adhered surface, measurement of reinforced concrete reinforcing bar position, pinning injection adhesive bottle cross-sectional position, waterproof protection water on the back of mortar, tile, depth of floating cracks on the back of mortar, tile, floating cracks on the back of mortar r(j
It can be used for measurement surveys and recording of these.

[Effects of the Invention] As is clear from the above embodiments, according to the present invention, an investigation hole is drilled in a building, an adapter with a scale displayed is inserted into the investigation hole, and an internal view is inserted into the adapter. Since diagnosis is performed by inserting a mirror, IJm inspections of repair work and various investigations necessary for construction management can be easily and non-destructively performed.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a building undergoing diagnosis according to an embodiment of the present invention, Fig. 2 is a top view thereof, and Fig. 3 is a perspective view of the adapter shown in Fig. 1. Fig. 4 shows its scale. It is a diagram. 1... Concrete frame 2...
... Mortar 3 ... Tile 4 ... ... Lifting crack on the back of mortar 5 ...
...Eye hole 6...Adapter 6a...Flange 6b...Window 6C...Scale 7... ...Crack scale 8...
... Endoscopy Patent Attorney Sasa Suyama - Figure 3 Figure 4

Claims (6)

[Claims] (1) A survey hole is drilled inward from the surface of a building with a finished mortar surface or concrete surface, and a scale is displayed on the inner surface of the survey hole, and a scale is displayed along this scale for visual confirmation. 1. A method for diagnosing a building, comprising inserting an adapter with a window formed therein, inserting an endoscope into the adapter, and inspecting the inner surface of an investigation hole through the window of the adapter. (2) The method for diagnosing a building according to claim 1, wherein the investigation hole is a blind hole. (3) The method for diagnosing a building according to claim 1 or 2, wherein the inner diameter of the investigation hole is within 10 mm. (4) The method for diagnosing a building according to any one of claims 1 to 3, wherein the endoscope is concentrically and rotatably inserted into the adapter. (5) The method for diagnosing a building according to any one of claims 1 to 4, wherein the adapter has a flange at one end. (6) The method for diagnosing a building according to any one of claims 1 to 5, wherein the inspection hole is bored in the tile joint.