JP2000180243A - Groundwater level measuring apparatus using swedish sounding tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple groundwater level measuring apparatus such that the level of water is determined during sounding test procedures. SOLUTION: A Swedish sounding tester 1 comprises a turning handle 4 attached to the head end of a sounding rod 2 having a screw point 3 connected to its end, and a clamp 5 for loading a weight 6 and a bottom plate 7 are provided respectively at the upper and lower positions of the outer periphery of the rod 2. Through holes 8 are provided in the sounding rod 3 at intervals along its longitudinal direction and filled with wettable members 9 to constitute a groundwater level measuring apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-investigation of a construction ground, and more particularly to a groundwater level measuring device for detecting the condition of groundwater, to which a Swedish sounding tester used so far is applied. .

[0002]

2. Description of the Related Art As a groundwater level measuring apparatus to which a Swedish sounding tester is applied, a groundwater level measuring apparatus has been registered so far.
No. 25256 Utility Model (hereinafter referred to as "prior art") has been implemented. That is, in a Swedish type sounding tester, a sounding rod is inserted into a water collecting pipe having a plurality of water collecting holes, and a tip of the water collecting pipe is bonded to a base of a screw point attached to the sounding rod tip. This is to determine the penetration resistance of the ground to be investigated, the composition of the soil layer, and the state of the groundwater.

However, in this prior art, the penetration resistance is added and changed due to the insertion of the water collecting pipe, so that it takes time to insert the pipe and accurate measurement cannot be performed.
After pulling up the sounding rod, the water collecting pipe is left in the soil, and the level of spring water that has penetrated into the water collecting pipe from the water collecting hole is measured by inserting a water level gauge or the like. In addition, there were also disadvantages such as a large economic burden such as the cost of the buried collection pipes and screw points, and the cost of the water level gauge.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional situation, and provides a simple groundwater level measuring apparatus which can simultaneously terminate the water level determination in the original sounding test procedure. Is what you do.

[0005]

According to the present invention, in order to achieve the above object, a screw point 3 is turned around a head end of a sounding rod 2 connected to a distal end thereof, a handle 4 is attached thereto, and the screw point 3 is mounted on an upper portion of the outer periphery of the rod 2. In a Swedish type sounding tester 1 comprising a loading clamp 5 for a weight 6 and a bottom plate 7 provided below the same, through holes 8 are provided at intervals in the length direction of the sounding rod 3, and the through holes 8 are wetted. The groundwater level measuring device is constituted by packing the conductive members 9.

In the above structure, the wettable member 9 is not particularly limited as long as it has good water absorption, but a nonwoven fabric such as felt or absorbent cotton is desirable.

[0007]

The operation of the present invention is the same as that of the conventional Swedish sounding tester. When the tip screw point reaches the hard rock and the test is completed, the through hole 8 is filled with the wettable member 9. A certain sounding rod 2 and screw point 3 are pulled up. In this case, the through holes 8 provided at intervals in the sounding rod of the present invention do not affect the sounding test. In other words, when water level measurement is not required, it functions as a normal sounding tester.

Then, the raised sounding rod 2
Then, the wettable member 9 packed in the through hole 8 is taken out, and the water level is determined based on the moisture absorption state. That is, where there is groundwater, since the groundwater is absorbed by the wettable member 9,
It can be easily determined.

[0008]

As described above, the present invention can perform both the original sounding test and the water level judgment by making a simple structural modification using the conventional Swedish sounding tester. In addition, since the penetration resistance of the ground and the state of the groundwater can be measured at the same time, comprehensive judgment of the configuration of the soil layer can be accurately and efficiently achieved. Compared to the prior art in which the collecting pipe and the screw point are left in the ground and the water level is measured later by a water level gauge, the workability and the economic efficiency are superior.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the Swedish type sounding tester 1 shown in FIG. 1, 2 is a sounding rod having a screw point 3 connected to the tip, 4 is a turning handle mounted on the head end of the rod 2, and 5 is a turning handle. A clamp 6 for loading the weight 6 fixed at an arbitrary position on the outer periphery of the rod 2 and a bottom plate 7 for preventing the clamp 6 for loading the weight 6 from being sunk by falling. The sounding rod 2 is formed by connecting a plurality of extension rods 2a, and a through hole 8 is provided in the lengthwise interval, and a felt material is filled in the through hole 8 as a wettable member 9, and the groundwater level is reduced. A measuring device is configured.

[Brief description of the drawings]

FIG. 1 is a side view of the apparatus of the present invention.

FIG. 2 is an enlarged partial perspective view of a sounding rod of the device of the present invention.

FIG. 3 is a side view showing an embodiment of the apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Swedish sounding tester 2 Sounding rod 2a Extension rod 3 Screw point 4 Turning handle 5 Weight loading clamp 6 Weight 7 Bottom plate 8 Through hole 9 Wettable member

Claims (2)

[Claims] 1. A screw 4 is turned around a head end of a sounding rod 2 connected to a distal end, a handle 4 is mounted, a loading clamp 5 for a weight 6 is mounted on an upper portion of the outer periphery of the rod 2, and a bottom plate 7 is mounted on a lower portion thereof. An underground water level measuring device comprising a Swedish sounding tester 1 provided with through-holes 8 in the sounding rod 3 at intervals in the longitudinal direction, and the through-holes 8 filled with wettable members 9. 2. The groundwater level measuring device according to claim 1, wherein the wettable member 9 is a nonwoven fabric.