JP7001482B2 - Water level measurement sensor mounting structure in the catchment well, and water level measurement sensor mounting method - Google Patents

Description

The present invention relates to a water level measurement sensor mounting structure in a catchment well for mounting a water level measurement sensor for measuring the water level in the catchment well, and a water level measurement sensor mounting method.

The occurrence of landslides is greatly affected by the groundwater level, although it depends on the soil quality and ground conditions. When the groundwater level is high, the strength of the geologically weak part of the slope (near the slip line, etc.) decreases, and landslides are likely to occur. For this reason, in places where landslides may occur, drainage wells are installed to collect water in the soil and drain it into swamps as a countermeasure to prevent landslides.

A water collection pipe for water collection and a drainage pipe for drainage are connected to the water collection well, but the water collection pipe and drainage pipe are gel-like due to clogging of sand and soil due to long-term use and propagation of microorganisms. The water flow capacity is reduced due to the adhesion of organic substances in the pipe.
Maintenance such as cleaning is required to restore the reduced water flow capacity, but for that purpose, it is necessary to grasp the water collection status and drainage status of the catchment well and grasp the maintenance time, but landslides In general, the place where the installation of a drainage well is required due to the risk of occurrence is a mountainous area, so in the past, the inside of the catchment well was only visually confirmed on site.

Patent Document 1 does not particularly consider the water level in the catchment well, but discloses a configuration in which a shaft inner wall investigation device for investigating the inner wall of the shaft is installed.
The search device (shaft inner wall search device 1) in Patent Document 1 has a gate-shaped support rack 10 installed across the shaft entrance and attached to the support rack 10, as described by reference numerals in Patent Document 1. The shaft inner wall investigation device 1 is suspended by a wire rope 14 by an electric winch 12 (FIG. 3 of Patent Document 1).

Patent Document 2 also discloses a configuration of a hanging jig for suspending a shaft inner wall investigation device for investigating the inner wall of a shaft, although the water level in the catchment well is not particularly a problem.
Explaining with reference numerals in Patent Document 2, the hanging jig 10 for suspending the search device (shaft inner wall search device 1) in Patent Document 2 is attached to the upper end ring portion of the shaft (for example, the frame ring 521 of the canopy 520). It has a possible mounting portion 16 and a rod portion 18 to which a base end portion is attached to the mounting portion 16. The rod portion 18 extends inward from the opening (elevating port) in which the door 524 of the canopy 520 is opened, and has a guide member 20 at the tip thereof. The investigation device 1 is supported by a wire rope 14 extending from the winch 12 provided in the mounting portion 16 along the rod portion 18 and suspended via a guide member 20 at the tip (FIGS. 3 and 3 of Patent Document 2). 6).

Patent Document 3 is significantly different from the water collecting well in the present invention in the installation location and conditions, and when there is inflow water (exuding groundwater) that flows into the excavation site (construction site) due to the excavation work, the inflow thereof. Although it is applied to the drainage method of discharging water to the outside of the site, an alarm type drainage method is shown in which an abnormal increase in water in the catchment well is detected without the labor of patrol and the like.
Explaining with reference numerals in Patent Document 3, in Patent Document 3, a catchment ditch 5 is excavated along the circumference of the excavation site 1, and the catchment ditch 5 is a catchment well provided in one corner of the excavation site 1. It communicates with Kamaba 7). The groundwater (inflow water) exuded into the excavation site 1 is collected in the Kamaba 7 through the catchment ditch 5, pumped by the constantly operating drainage pump 10, and discharged into the side ditch 12 through the drainage pipe 11. When the water level sensor 14 arranged in the kamaba 7 detects the water level in the kamaba 7 and the water level rises to the abnormal water level WL2, the alarm device 18 is activated to issue an alarm (see FIG. 1 of Patent Document 3).

JP 2012-202173 JP 2013-014950 Japanese Patent Application Laid-Open No. 8-333793

When checking the water collection status by visual means on site, in particular, while the water collected by the water collection pipe is falling, the ramp installed inside the water collection well must be used to descend into the mine. If it is corroded or deformed due to aging, it cannot go down into the mine.
Even if the ramp is not corroded or deformed, in the case of a deep catchment well such as 30 m to 60 m, it is not an easy task to get off such a deep catchment well and inspect it.

In a structure in which the search device 1 is suspended from the support rack 10 by a wire rope 14 as in Patent Document 1, when the search device is a water level measurement sensor that is expected to be installed for a long period of time as in the present invention, the support rack 10 collapses. Since the support rack 10 must be constructed with sufficient strength and the foundations of the support columns on both sides are also required, a great deal of labor is required in mountainous areas where catchment wells are installed. , The construction cost is also high.

Like the hanging jig 10 of Patent Document 2, the wire rope 14 supporting the investigation device 1 is hung from the tip of the rod portion 18 extending inward from the opening (elevating port) in which the door 524 of the canopy 520 is opened. In the lowered configuration, when the investigation device is a water level measurement sensor that is supposed to be installed for a long period of time as in the present invention, the door 524 of the canopy 520 is left open, which is adopted from the viewpoint of safety. Is not valid.

In Patent Document 3, a water level sensor 14 is arranged in a water collecting well (Kamaba 7), and the water level in the water collecting well 7 is monitored by the water level sensor 14, but this Patent Document 3 is the subject thereof. However, it is nothing more than monitoring the water level in the catchment well in the excavation site by excavation work that has nothing to do with landslides. Patent Document 3 is not a large-scale one in which the catchment well targeted by the present invention is generally installed in a mountainous area, the catchment well is remarkably small, and it is difficult to arrange, maintain, and the like of the water level sensor 14. The installation location and conditions are such that there are almost no circumstances, and it is merely a case where there is not much difference from the water level management of the water tank.

The present invention was made based on the above background, and is intended for large-scale catchment wells that are generally installed in mountainous areas as countermeasures to suppress landslides, and workers do not need to descend into the catchment wells. It is possible to detect the water level in the landslide and check the drainage status, and there is no need to construct a costly structure such as a support rack on the ground of the landslide, and the canopy door. The purpose is to provide a water level measurement sensor mounting structure that allows the water level measurement sensor to be installed for a long period of time without leaving the water level in an open state. Furthermore, the water level measurement sensor is highly safe and has a simple configuration and is inexpensive. It is an object of the present invention to provide a water level measurement sensor mounting structure and a water level measuring sensor mounting method capable of obtaining various effects such as being able to install the water level.

According to the first aspect of the present invention, which solves the above-mentioned problems, a water collecting well main body, which is a cylindrical shaft, is formed by connecting a plurality of liner plates, and a water collecting well having a canopy at the well mouth is provided with a water level in the collecting well. It is a water level measurement sensor mounting structure that mounts a water level measurement sensor that measures
A hanging member hung across the wellhead in the radial direction on the canopy, and a hanging member.
It is equipped with a sensor mount for mounting the sensor installed on the hanging member.
The hanging member is characterized in that the canopy is attached to the canopy by sandwiching the canopy from both sides in the radial direction of the well by means of downward protrusions provided at both ends thereof.

2. The second aspect of the present invention is the water level measurement sensor mounting structure in the catchment well of the first aspect.
A nut is welded and fixed at the position of the bolt insertion hole opened in the downward protrusion, and the tip of the bolt screwed inward from the outside into the nut enters the concave groove portion of the liner plate constituting the water collecting well body. It is characterized in that the hanging member is attached to the canopy in such a manner that the canopy is sandwiched from both sides in the radial direction of the well by the downward protrusions at both ends thereof.

3. The third aspect of the present invention is the water level measurement sensor mounting structure in the catchment well of the first aspect.
The canopy is composed of a canopy frame having a ring-shaped frame material on the outer periphery of the canopy, which is mounted on the top end of the water collection well body, and a canopy surface material which is fixed on the canopy frame and covers the wellhead of the water collection well.
The hanging member is attached to the canopy in such a manner that the ring-shaped frame members of the canopy are sandwiched from both sides in the radial direction of the well by the downward protrusions at both ends thereof.

A fourth aspect of the present invention is the water level measurement sensor mounting structure in the catchment well of the third aspect.
The ring-shaped frame material of the canopy frame is angle steel, and in the canopy frame, one flange of the ring-shaped frame material made of angle steel faces downward and the other flange faces outward along the inner surface of the catchment well body. It is a configuration that is placed on the main body of the catchment well so that it projects outward from the outer surface of the main body of the catchment well.
The downward protrusion of the hanging member has a folded portion that is folded inward from the lower end of the downward portion, and the folded portion projects from the outer surface of the catchment well body of the other flange of the angle steel. It is characterized in that it can be engaged with a portion.

5. The fifth aspect of the present invention is the water level measurement sensor mounting structure in the catchment well of the fourth aspect.
A nut is welded and fixed at the position of a bolt insertion hole opened in the folded portion of the downward protrusion of the hanging member, and the tip of the bolt screwed upward to the nut is a collection of the other flanges of the angle steel. It is characterized in that the end portion of the hanging member is engaged with the ring-shaped frame member of the canopy by abutting against the lower surface of the overhanging portion from the outer surface of the Mizui main body.

A sixth aspect of the present invention is the water level measurement sensor mounting structure in the catchment well according to any one of the first to fifth aspects.
The hanging member is composed of a central portion in which the sensor mount is installed and end side portions on both sides thereof, and the end side portions are connected to both sides of the central portion by bolt coupling. do.

A seventh aspect of the present invention is the water level measurement sensor mounting structure in the catchment well according to any one of claims 1 to 6.
The water level measurement sensor is a capacitance type water level measurement sensor, and its rope-shaped detection electrode is suspended from the sensor body on the sensor mount to the inside of the catchment well, and is made of steel and functions as a ground electrode. It is characterized in that the water collecting well main body is electrically connected to the sensor main body via the steel hanging member.

8. The eighth aspect of the present invention is the water level measurement sensor mounting structure in the catchment well according to any one of claims 1 to 7.
The sensor mount has a fixed portion fixed to a hanging member and a vertically movable portion attached to the fixed portion so that the height position can be adjusted up and down, and the sensor main body is attached to the vertically movable portion. It is characterized by being.

A ninth aspect of the present invention is the water level measurement sensor mounting structure in the catchment well according to any one of the first to eighth aspects.
The canopy is composed of two semi-circular canopy halves, and the frame members having a diameter portion made of shaped steel in which the two canopies are in contact with each other are joined by bolts.
The hanging member is characterized in that it is arranged on a canopy bisection on one side adjacent to a joint portion between the diameter portions.

A tenth aspect of the present invention is the water level measurement sensor mounting structure in the catchment well according to any one of claims 1 to 8.
The canopy is composed of three divided bodies of a canopy central body including a circular diameter position and canopy side bodies arranged on both sides thereof, and frame members made of shaped steel in contact with each other of adjacent divided bodies are bolted to each other. It is joined by
The hanging member is characterized in that it is arranged in the canopy central body.

The invention of claim 11 is a method of attaching a water level measurement sensor in a catchment well, wherein the water level measurement sensor according to any one of claims 1 to 10 is attached to an existing catchment well having a canopy covering the entire wellhead of the catchment well. It is characterized by providing a structure.

According to the present invention, since the sensor mount for mounting the sensor is installed on the hanging member spanned so as to cross the well mouth of the catchment well in the radial direction, the shaft is not interfered with by the ramp or the like provided on the inner wall of the catchment well. It is possible to install a water level measurement sensor near the center of the space.
Therefore, it is possible to safely, reliably and efficiently perform the sensor installation work without a worker entering the catchment well.
In addition, the hanging member on which the sensor mount is installed can be attached to the canopy or collection on-site by sandwiching the upper end of the drainage well from both sides in the radial direction of the well by means of downward protrusions provided at both ends. The sensor mount can be installed without processing the Mizui body (liner plate), and the sensor mount can be installed efficiently even in mountainous areas.

The hanging member is attached by sandwiching the ring-shaped frame material portion of the canopy from both sides in the radial direction of the well diameter by the downward protrusions at both ends, and the structure of the sandwiched portion (downward protrusion) is simple and inexpensive. Not only can it be manufactured, but it is also easy to install the hanging member on the canopy.

When expanded metal is used as the canopy surface material, in the case of a water level measurement sensor that needs to suspend the water level detection part in the mine, such as the capacitive water level measurement sensor of the embodiment, the water level is detected from the mesh of the expanded metal. The part can be hung in the mine for measurement.
Further, in the case of an ultrasonic type or radio wave type water level measurement sensor, since ultrasonic waves or radio waves can be emitted and measured through a mesh, it is not necessary to provide a hole for the sensor in the canopy.

When a capacitance type water level measurement sensor is used as the water level measurement sensor, a rope-shaped detection electrode is used as the detection electrode for measuring in direct contact with water, so that it can be used for long lengths required for deep wells. Since it is easy to handle, lightweight and compact, it has excellent transportability and workability in places with poor feet such as mountainous areas, and is suitable as a water level measurement sensor for water collecting wells.

As in claim 8, in the configuration in which the sensor mount has a height-adjustable vertical movable portion and the sensor main body is attached to the height-adjustable vertical movable portion, deformation of the catchment well, construction error, etc. Therefore, even if the depth of the catchment well differs between the design dimensions and the actual measurement at the site, or if it becomes necessary to change the water level to be managed, it can be easily handled at the installation site.
As will be described later in FIG. 9, the length L ₀ of the detection unit (the portion that functions as a sensor) can be set in the sensor main body 4a, and the sensing accuracy is better as the length L ₀ of the detection unit is shorter. The vertically movable portion is effective because the length L ₀ of the detecting portion is not unnecessarily lengthened.

In the water level measurement sensor mounting structure of the present invention, the sensor mount with the water level measurement sensor mounted is installed on the hanging member that is hung over the canopy so as to cross the wellhead of the catchment well in the radial direction. Since the weight is such that two workers can hold it by hand and perform the installation work, the water level measurement sensor can be easily and inexpensively installed in the existing catchment well, and the existing water level measurement sensor can be installed. It is especially effective when targeting the catchment wells of.

The catchment well provided with the water level measurement sensor mounting structure of 1st Embodiment of this invention is shown, (a) is the schematic plan view of the catchment well, (b) is the schematic vertical sectional view of the catchment well. (A) is a plan view of the catchment well (detailed enlarged view of FIG. 1 (a)), (b) is a schematic cross-sectional view taken along the line AA excluding the sensor mount of (a), and (c) is of (a). It is a schematic BB sectional view excluding the sensor mount. (A) is an enlarged view of a portion of the water level measurement sensor mounting structure in FIG. 2, and (b) is a sectional view taken along the line CC of (a). It is a detailed enlarged view of part E of FIG. 3 (a). FIG. 4 is a cross-sectional view taken along the line DD of FIG. 4 (also an enlarged view of a portion F in FIG. 3 (b)). (A) is an enlarged view of only the central part of the water level measurement sensor mounting structure in FIG. 3 (a), and (b) is a front view showing a partial cross section of (a). be. (A) is a cut-out view of the sensor mount in FIG. 6 (b), (b) is a right side view of (a), and (c) is an exploded view for explaining the height adjustment function of the sensor mount. It is a figure. (A) is a diagram showing a modified example of the folded portion in FIG. 5, and (b) is a diagram showing another modified example. It is a schematic diagram explaining the operation in the catchment well of the water level measurement sensor 4 (4a) of an Example which is a capacitance type water level measurement sensor. An embodiment of the case where the canopy is a three-divided canopy is shown, and is a plan view of the catchment well (a diagram corresponding to FIG. 2 (a)). FIG. 10 is an enlarged view showing the vicinity of the portion of the water level measurement sensor mounting structure in FIG. 10 is a diagram showing the configuration of folded portions at both ends of the hanging member in FIGS. 10 and 11, and is a diagram corresponding to FIGS. 5 and 8. (A) explains the function or function of the catchment well to which the water level measurement sensor mounting structure of the present invention is applied. It is a perspective view of the constituent liner plate.

Hereinafter, the structure for mounting the water level measurement sensor and the method for mounting the water level measurement sensor in the catchment well of the present invention will be described with reference to the drawings.

FIG. 1 shows a catchment well 1 provided with the water level measurement sensor mounting structure 11 of the first embodiment of the present invention, (a) is a schematic plan view of the catchment well 1, and (b) is a schematic view of the catchment well 1. It is a vertical sectional view of.
The catchment well 1 has a structure in which a plurality of liner plates are connected to form a catchment well main body 2 which is a cylindrical shaft, and a canopy 3 is provided at a wellhead (upper end opening of the catchment well main body 2).
The sensor body 4a of the water level measurement sensor 4 for detecting the water level in the catchment well 1 is installed on the canopy 3.
The water level measurement sensor 4 in the illustrated example is a capacitance type water level measurement sensor, and a rope-shaped detection electrode 4b is suspended near the bottom of the catchment well. 4d is a weight.

The catchment well in the present invention is installed in a place where a landslide may occur, for collecting groundwater and draining it into a stream, a river, or the like, and for collecting water as shown in FIG. 13 (a). A plurality of water collecting pipes 61 are connected, and a drainage pipe 62 for draining the collected water is connected.
Landslides are more likely to occur when the groundwater level rises on a slope because the strength of geologically weak areas (near the slip line S, etc.) decreases. Know the time (during heavy rain, when drainage is low, etc.) and use it as a basis for determining the maintenance time.
FIG. 13 (b) shows the liner plate 70 constituting the catchment well main body 2. A plurality of arcuate liner plates 70 are formed into a ring shape by bolting the flanges 70c in the circumferential direction to each other, and bolting the flanges 70b of the liner plates 70 adjacent to the top and bottom to form a cylindrical collection. It constitutes the Mizui main body 2. The corrugated steel plate portion is indicated by 70a.

As shown in FIGS. 2 and 3, the canopy 3 has a canopy frame 50 having a ring-shaped frame member 6 mounted on the top end of the water collecting well main body 2 on the outer periphery, and a water collecting well fixed on the canopy frame 50. It is composed of a canopy surface material 7 that covers the wellhead. The canopy surface material 7 is an expanded metal in this embodiment.
The canopy 3 in the illustrated example is a two-divided canopy composed of two semi-circular canopy two-divided bodies 8.
Each canopy bipartition 8 is formed by welding and connecting a plurality of vertical beam members 9b and lateral beam members 9c, which are also made of angle steel, to the inside of a semicircular frame member 9a made of angle steel to form a two-part frame 50a. The canopy surface material 7 is welded and fixed to the upper surface thereof. The semi-circular frame member 9a is composed of a semi-circular frame member 9a'and a diameter portion frame member 9a', and one canopy bisection 8 is provided with a door 10 for an elevating port.
The canopy 3 is configured by bolting the diameter frame members 9a "of the two canopy split bodies 8 to each other.
The two semi-arc frame members 9a'in the canopy 3 form a ring shape to form the ring-shaped frame member 6.

A hanging member 12 is hung on the canopy 3 so as to cross the wellhead of the catchment well 1 in the radial direction. As shown in FIG. 3, the connecting member 12 is formed by connecting two beam members 12'made of angle steel extending in the radial direction with a connecting member 12 "in the illustrated example, and connecting the beam members 12'. A sensor pedestal 13 is installed on the member 12, and the sensor main body 4a of the water level measurement sensor 4 is attached to the sensor pedestal 13.
The E part of FIG. 3 (a) is enlarged and shown in FIG. 4, and the F part of FIG. 3 (b) is enlarged and shown in FIG.
As shown in FIGS. 4 and 5, the hanging member 12 has ring-shaped frame members 6 (semi-arc frame members 9a') of the canopy 3 from both sides in the diameter direction of the well by means of downward protrusions 15 fixed to both ends thereof. It is attached to the canopy 3 in a sandwiching manner. In the illustrated example, the downward protruding portion 15 is welded and fixed to each beam member 12'of the hanging member 12. Instead of fixing by welding, bolt insertion holes may be formed in the attachment portion 15c of the downward projecting portion 15 to the beam material 12'and the beam material 12', and the downward protrusion portion 15 may be fastened and fixed with bolts and nuts.

As shown in FIG. 5, in the angle steel constituting the ring-shaped frame member 6 (semi-circular frame member 9a'as one side portion thereof), one of the vertical flanges f1 faces downward on the lower surface side of the canopy surface material 7. It is placed on the upper end of the catchment well main body 2 along the inner surface of the catchment well main body (liner plate 70) 2 so that the other horizontal flange f2 faces outward and projects outward from the outer surface of the catchment well main body 2.
The downward protruding portion 15 has a folded-back portion 15b that is folded inward from the lower end of the downward-facing portion 15a, and a nut 17 is fixed at a position of a bolt insertion hole (not shown) formed in the folded-back portion 15b. ing.
Then, the tip of the bolt 19 screwed upward into the nut 17 is abutted against the lower surface of the overhanging portion g from the outer surface of the catchment well main body of the other horizontal flange f2 of the angle steel. With this configuration, both ends of the hanging member 12 are connected to the ring-shaped frame member 6 (semi-arc frame member 9a') of the canopy 3.

The hanging member 12 is composed of a central portion 12A on which the sensor mount 13 is installed and end side portions 12B on both sides thereof, and the connecting portion Q between the central portion 12A and the end side portions 12B on both sides thereof is omitted. However, it is configured to attach the joint plate and connect it with the joint bolt.

The details of the sensor mount 13 installed in the central portion 12A of the hanging member 12 are shown in FIGS. 6 and 7.
7 (a) is a cut-out view of the sensor mount 13 in FIG. 6 (b), FIG. 7 (b) is a right side view of (a), and FIG. 7 (c) is the height of the sensor mount 13. It is an exploded view for demonstrating an adjustment function.
The sensor pedestal 13 includes a mounting plate 21 for mounting the main body base 4c of the sensor main body 4a, a pedestal beam 22 made of angle steel fixed on both sides of the mounting plate 21, and 4 fixed to the lower surface of the pedestal beam 22. The lower end surface of the lower post 25, which has a vertically movable portion 24 formed from the upper post 23 of the book and fits the upper post 23 of the vertically movable portion 24 in a height-adjustable manner, is fixed to the beam member 12'with a bolt. ing. Both the upper post 23 and the lower post 25 have five adjusting bolt insertion holes 26 in the illustrated example. 7 (a) and 7 (b) show the positions where the vertically movable portion 24 is most lowered, and the vertically movable portion 24 is raised to a desired height and the bolts 27 are inserted into the bolt insertion holes 26 of both for positioning.

8 (a) and 8 (b) show deformation examples of the downward protrusions 15 provided at both ends of the hanging member 12 described with reference to FIG.
The downward projecting portion 15'in FIG. 8 (a) has a configuration excluding the bolt 19 and the nut 17 in the downward projecting portion 15 of FIG. 5, and has only a downward projecting portion 15a and a folded portion 15b.
Due to the presence of the downward portion 15a and the folded portion 15b, the hanging member 12 is attached to the ring-shaped frame material 6 (9a') so as not to come off from the ring-shaped frame material 6 (semi-arc frame material 9a') of the canopy 3. Can be engaged.
The downward protruding portion 15 ”in FIG. 8 (b) has a configuration in which the folded-back portion 15b in the downward protruding portion 15 ′ of FIG. 8 (a) is also omitted, and only has the downward protruding portion 15a.
The presence of the downward portion 15a allows the hanging member 12 to be engaged with the ring-shaped frame member 6 (9a') so as not to come off from the ring-shaped frame member 6 (9a') of the canopy 3.

FIG. 9 is a schematic diagram illustrating the operation of the water level measurement sensor 4 (4a) of the embodiment, which is a capacitance type water level measurement sensor, in the catchment well.
In the capacitance type water level measurement sensor 4 of the embodiment in which the rope-shaped detection electrode 4b, which is an insulating coated electric wire, is suspended in the water collecting well 1, the sensor body 4a is connected to the sensor body 4a via the connecting member 12 and the sensor mount 13. The connected steel water collecting well body 2 (liner plate) functions as a ground electrode and is in the water of the set detection part (the part that functions as a sensor (the part of length _L0 )) in the long detection electrode 4b. The capacitance generated corresponding to the length L of the portion is detected by the sensor body 4, and the water level is detected.
The length L ₀ of the detection unit that functions as a sensor can be set in the sensor body 4a. The shorter the length L ₀ of the detection unit, the better the sensing accuracy, and the shorter it is, the more power is saved. Therefore, it is appropriate to shorten the detection accuracy as much as possible without unnecessarily exceeding the expected range of fluctuations in the water level. ..
In the embodiment, stainless steel is used as the main body base 4c of the sensor main body 4a, but since there is a risk of galvanic corrosion between the sensor main body 4a and the mounting plate 21 using a steel plate, an insulating coating is applied to the outer surface of the main body base 4c. Giving. In this case, a bolt that attaches the main body base 4c to the mounting plate 21 ensures electrical continuity with the catchment well main body (liner plate) 2 that serves as a ground electrode.

The water level measurement sensor mounting structure 11 described above is mounted on the catchment well in such a manner that the upper end portion of the catchment well is sandwiched from both sides in the radial direction of the well by the downward protrusions 15 provided at both ends of the hanging member 12 on which the sensor mount 13 is installed. And because its weight is such that two workers can hold it and perform the installation work, for example, two workers can hold it by hand and simply slide it sideways on the canopy 3. Then, it can be mounted on the canopy 3. Therefore, the sensor pedestal can be installed without processing the canopy or the main body of the catchment well (liner plate) at the site, and the sensor pedestal installation work can be efficiently performed even in the mountainous area.
Therefore, the water level measurement sensor can be easily and inexpensively installed in the existing catchment well, which is particularly effective when the existing catchment well is targeted.

FIG. 10 shows an embodiment when the canopy is a three-divided canopy, and FIG. 10 shows a plan view of the catchment well 101 (a diagram corresponding to FIG. 2 (a)), and FIG. 11 shows a water level measurement sensor mounting structure in FIG. 11 is an enlarged view showing the vicinity of the portion 11.
The canopy 103 is composed of a canopy frame 150 having a ring-shaped frame member 106 mounted on the top end of the water collecting well body on the outer periphery, and a canopy surface material 107 fixed on the canopy frame 150 and covering the wellhead of the water collecting well 101. Become. The canopy surface material 107 is also an expanded metal in this embodiment.
The canopy 103 of the illustrated example is composed of three divided bodies of a canopy central body 108A including a circular diameter portion and canopy side bodies 108B and 108C arranged on both sides thereof, respectively. The constituent frames constituting each of the three divided bodies (108A, 108B, 108C) are shown by 150a, 150b, and 150c. The canopy skeleton 150 is composed of three constituent skeletons 150a, 150b, and 150c.

In the frame 150a of the canopy central body 108A, both ends of two short arc-shaped frame members 109a on both sides in the radial direction are connected to each other by a chord frame member 109b, and four vertical beams are connected between the chord frame members 109b. It is configured to be connected by the material 109c. The connection is a connection by welding.
On the other hand, in the frame 150b of the canopy side body 108B, both ends of the arc-shaped frame material 109a'are connected by the chord frame material 109b', and between the arc-shaped frame material 109a'and the chord frame material 109b'. It is configured by connecting four vertical beam members 109c'. The connection is a connection by welding.
In the other frame 150c of the canopy side body 108C, both ends of the arc-shaped frame member 109a'are connected by the chord frame member 109b', and between the arc-shaped frame member 109a'and the chord frame member 109b'. It has a structure in which three vertical beam members 109c'are connected to each other, and a door 110 for an elevator is provided.
The frame material and the beam material in the canopy central body 108A, the canopy side body 108B, and 108C are all angle steel.
The two short arc-shaped frame members 109a in the canopy central body 108A, the arc-shaped frame body 109a'in one canopy side body 108B, and the arc-shaped frame body 109a' in the other canopy side body 108C are canopy frames. The ring-shaped frame member 106 of 150 is configured.
The string frame material 109b on one side of the canopy central body 108A and the string frame material 109b'on one side of the canopy side body 108B are joined, and the string frame material 109b on the other side of the canopy central body 108A and the other side. However, the joints of the canopy side body 108B with the chord frame member 109b'are all bolt joints.

The water level measurement sensor mounting structure 111 in the three-divided canopy 103 is basically the same as the water level measurement sensor mounting structure 11 of the first embodiment described with reference to FIGS. 1 to 9, but the canopy is divided into three parts. It is slightly different in that it corresponds to the difference in the cross-sectional shape of the ring-shaped frame material (angle steel) 106 of the canopy 103.
FIG. 11 is an enlarged view of the portion of the water level measurement sensor mounting structure 111 in FIG. 10, and corresponds to FIG. 3 (a) in the case of the two-division type.
The hanging member 112 in the water level measurement sensor mounting structure 111 is the same as that of the first embodiment in that it is installed on the canopy 103, but is hung so as to cross the wellhead in the diameter direction. That is, the hanging member 112 is arranged at the center position (diameter position) of the canopy central body 108A in the three-divided canopy 103, and is vertically symmetrical in FIG. Therefore, the two beam members 112'constituting the hanging member 112 have the same length.
Further, the point where the hanging member 112 is composed of the central portion 112A on which the sensor mount 13 is installed and the end side portions 112B on both sides thereof, and the connecting portion Q between the central portion 112A and the end side portions 112B on both sides thereof form a joint plate. It is also the same as that of the first embodiment in that it is configured to be connected by a joint bolt.

As shown in FIG. 12, the angle steel constituting the ring-shaped frame member 106 (arc-shaped frame member 109a, 109a') in this embodiment has the same vertical flange f1 as in the first embodiment, but faces outward. The other horizontal flange f2 is different from the ring-shaped frame material 6 (semi-arc frame material 9a') of the first embodiment in that it does not project outward from the outer surface of the catchment well main body 2.
The downward projecting portion 115 welded and fixed to the end of the beam member 112'of the hanging member 112 only has a mounting portion 115c to the beam member 112' and a downward portion 115a, and is opened in the downward portion 115a. A nut 117 is welded and fixed at the position of the bolt insertion hole (not shown), and the tip of the bolt 119 screwed inward from the outside into the nut 117 enters the concave groove portion 70d of the liner plate 70 of the water collecting well body 2. (It is pointed in the illustrated example). The hanging member 112 is attached to the canopy 103 by the downward protrusions 115 at both ends.

1,101 Reservoir 2 Reservoir body 3,103 Canopy 4 Water level measurement sensor 4a Sensor body 4b Detection electrode 4c Body base 4d Weight 6,106 Ring-shaped frame material f1 One flange of angle steel (vertical flange)
f2 The other flange of angle steel (horizontal flange)
7,107 Canopy surface material 8 Canopy face material 8 Canopy bisection 9a Semi-circular frame material 9a'Semi-arc frame material 9a "Diameter frame material 9b Vertical beam material 9c Horizontal beam material 10, 110 Door 11, 111 Water level measurement sensor mounting structure 12, 112 Hanging member 12', 112' Beam member 12A Central part 12B (on both sides of the hanging member) End side part Q (on both sides of the hanging member) Central part 12A and end side part 12 Connection part 13 Sensor frame 15, 15', 15 ", 115 Downward protrusion 15a, 115a Downward part 15b Folded part 15c, 115c Mounting part 17, 117 Nut 19, 119 Bolt 21 Mounting plate 22 Mount beam 23 Upper post 24 Upper and lower Movable part 25 Lower post 26 Adjustment bolt Insertion hole 27 Bolt 50 (in two-split canopy) Canopy frame 50a Constituent frame 70 Liner plate 70d Concave groove 108A (three-split canopy) Canopy center body 108B, 108C (three-split) Canopy side body 109a, 109a'arc-shaped frame material 109b, 109b'string frame material 109c, 109c'longitudinal beam material 150 (three-divided canopy) canopy frame 150a constituent frame

Claims (11)

A water level measurement sensor is attached to a water collection well that has a canopy at the wellhead and a water level measurement sensor that measures the water level in the water collection well. It ’s a structure,
It is provided with a hanging member hung on the canopy so as to cross the wellhead in the radial direction, and a sensor mount for mounting a sensor installed on the hanging member.
The water level measurement sensor mounting structure in a catchment well, characterized in that the hanging member is mounted on the canopy by sandwiching the canopy from both sides in the radial direction of the well by means of downward protrusions provided at both ends thereof. A nut is welded and fixed at the position of the bolt insertion hole opened in the downward protrusion, and the tip of the bolt screwed inward from the outside into the nut enters the concave groove portion of the liner plate constituting the water collecting well body. By being out
The water level measurement sensor in a catchment well according to claim 1, wherein the hanging member is attached to the canopy by sandwiching the canopy from both sides in the radial direction of the well by the downward protrusions at both ends thereof. Mounting structure. The canopy is composed of a canopy frame having a ring-shaped frame material on the outer periphery of the canopy, which is mounted on the top end of the water collection well body, and a canopy surface material which is fixed on the canopy frame and covers the wellhead of the water collection well.
The first aspect of claim 1, wherein the hanging member is attached to the canopy by sandwiching the ring-shaped frame material portion of the canopy from both sides in the radial direction of the well by the downward protrusions at both ends thereof. Water level measurement sensor mounting structure in the catchment well. The ring-shaped frame material of the canopy frame is angle steel, and in the canopy frame, one flange of the ring-shaped frame material made of angle steel faces downward and the other flange faces outward along the inner surface of the catchment well body. It is a configuration that is placed on the main body of the catchment well so that it projects outward from the outer surface of the main body of the catchment well.
The downward protruding portion of the hanging member has a folded portion that is folded inward from the lower end of the downward portion, and the folded portion projects from the outer surface of the catchment well main body of the other flange of the angle steel. The water level measurement sensor mounting structure in a catchment well according to claim 3, wherein the structure is such that it can be engaged with a portion. A nut is welded and fixed at the position of a bolt insertion hole opened in the folded portion of the downward protrusion of the hanging member, and the tip of the bolt screwed upward to the nut is a collection of the other flanges of the angle steel. The water level measurement in the catchment well according to claim 4, wherein the end portion of the hanging member is engaged with the ring-shaped frame member of the canopy by abutting against the lower surface of the overhanging portion from the outer surface of the water well body. Sensor mounting structure. The hanging member is composed of a central portion in which the sensor mount is installed and end side portions on both sides thereof, and the end side portions are connected to both sides of the central portion by bolt coupling. The water level measurement sensor mounting structure in the catchment well according to any one of claims 1 to 5. The water level measurement sensor is a capacitance type water level measurement sensor, and its rope-shaped detection electrode is suspended from the sensor body on the sensor mount to the inside of the catchment well, and is made of steel and functions as a ground electrode. The water level measurement sensor in the catchment well according to any one of claims 1 to 6, wherein the catchment well main body is electrically connected to the sensor main body via the steel hanging member. Mounting structure. The sensor mount has a fixed portion fixed to a hanging member and a vertically movable portion attached to the fixed portion so that the height position can be adjusted up and down, and the sensor main body is attached to the vertically movable portion. The water level measurement sensor mounting structure in the catchment well according to any one of claims 1 to 7, wherein the water level measurement sensor is attached. The canopy is composed of two semi-circular canopy halves, and the frame members having a diameter portion made of shaped steel in which the two canopies are in contact with each other are joined by bolts.
The catchment well according to any one of claims 1 to 8, wherein the hanging member is arranged on a canopy bisection on one side adjacent to a joint portion between the diameter portions. Water level measurement sensor mounting structure. The canopy is composed of three divided bodies of a canopy central body including a circular diameter position and canopy side bodies arranged on both sides thereof, and frame members made of shaped steel in contact with each other of adjacent divided bodies are bolted to each other. It is joined by
The water level measurement sensor mounting structure in a catchment well according to any one of claims 1 to 8, wherein the hanging member is arranged in the canopy central body. A method for mounting a water level measurement sensor in a water collecting well, wherein the existing water collecting well having a canopy covering the entire wellhead of the water collecting well is provided with the water level measurement sensor mounting structure according to any one of claims 1 to 10. ..

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