JPS5918813A - Confirming device for injection range of grout - Google Patents

Abstract

PURPOSE:To confirm the injection range of a grout by a method in which a swivel closing an electric circuit, a double-tube connection rod with a cable conduit, and a connection rod having an electrode connected to its outside are connected. CONSTITUTION:A confirming device, in which a swivel having a terminal 1 connected with a cable connector 6 through a rotary terminal 3 and a brush 4 on its top is connected with a connecting rod, and a connecting rod with an electrode, is inserted in places A and B different from a grout injection port C. Output from the terminal of the swivel is connected to a resistance measurer, and the electric resistances when applying voltage between A-C and B-C are measured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chemical liquid injection range confirmation device for confirming the injection range in ground stabilization work by chemical liquid injection.

The method of injecting chemical liquid into the ground is rapidly developing because it is an effective method for stopping water in L7 without increasing the strength of soft ground.

However, the complexity of the ground layer to be constructed, the trend of sewage, the type of injection agent, injection pressure, and injection method.

Because various factors such as differences in gel time are intertwined, it is difficult to accurately judge the injection situation, and although various studies are being conducted on how to confirm this effect, it has not yet been completed. There is no technology.

In view of this, the inventors decided to determine the range of the injected drug solution.
As a result of various studies regarding devices related to i7/'', we found that when a current is transmitted while injecting a chemical solution using a chemical injection tube equipped with a base transmitter, it is reliable.

We have achieved a drug solution injection range confirmation device that can capture pregnancy signals and confirm the drug solution injection range.

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(a) A swivel in which an electrical circuit is closed between one or more electrical signal terminals provided on the swivel head and a cable connector located at the center of the lower end of the swivel via a rotating brush and a cable. , (1)) A connecting lot consisting of a cable conduit with cable connectors at both ends arranged in the armpits of two concentric pipes, (C) a concentric two-pipe cable conduit with cable connectors at both ends. Confirmation of chemical liquid injection range, which is arranged at the sleeve of the pipe, and is characterized in that - outside MM: electrode + J connecting roller, which connects the electrode and the lead wire guided by the cable, are appropriately connected U7. It is related to the device.

The chemical injection range confirmation device of the present invention will be explained with reference to the drawings below.

FIG. 1 shows a swivel, in which a terminal 1 is provided at the head of the swivel so as to be insulated from the circumference by an insulator 14. This terminal 1 is connected by a brush 4 to a rotary terminal 6 which is installed in a watertight manner to a middle tube 2 which is rotatably attached around its axis inside the tube. Lead wires are drawn out from the rotary μ element 6 to the inside thereof and are collected in a cable conduit in the middle of the middle pipe 2, and the end thereof is connected to the cable connector 6.

In the middle 92-J, it is held by a ball bearing 7 against the swivel mantle and also has a U-cup 8.0-
The ring 9 and oil seal 10 make it watertight and rotatable. The lower end of this middle tube 2 is formed with a plug 11 that is compatible with the sockets of other injection tube lots, and inside it is provided with a plug 16 formed in a manner similar to the cable conduit 5. A fluid path 12 between the inner tube 2 and the inner tube 2 is secured. The length of the cable conduit 5Fi connected to the cable connector 6 is provided with a slight margin to facilitate connection with the cable connector of the injection tube lot.

Further, 15 is a drilling fluid container for inserting the confirmation device into the ground.

Although FIG. 2 shows the connecting rod 16, the illustration of the cable conduit is omitted to simplify the drawing. The end edges of the connecting rod outer tube 17 and the middle tube 18 are processed into sockets and plugs so that they can be connected and connected to other members, respectively.

Figure 6 shows the electrode 20 on the I# outer wall of the connection rod.
This figure shows the tl# connection rod 19 with a tl# attached to it, and the cable conduit tl-1 is omitted as in FIG. Each edge is 4 years old and has a socket and plug. In this case, a single lead wire led out from the cable conduit passes through the midgastric wall and is connected to a terminal extending at 1 on the outer wall of the mantle tube.

When using the swivel and connecting rod as described above, 1. For example, prepare the connecting rod as shown in Fig. 2 by about 150 cm and the connecting rod with electrode shown in Fig. 3 at a height of about 50 α. , Judgment of drug injection effect at desired depth.
You can check freely.

The effects in an actual-scale injection test using the liquid medicine injection range confirmation device according to the present invention will be explained below.

As shown in Fig. 4, insert the confirmation devices A and B into the locations marked in red with respect to the chemical solution inlet C, and connect the output from the terminal of the swivel head to the Cole Rush type resistance measuring device.
The electrical resistance was measured when voltage was applied between 0 and B-0, and the results are shown in the table.

In addition, the distance between A and 0 is 1 m, BCrIA is 75 m, the deepest part of each lot is 4.5 m from the ground surface, and measurement points 1, 2, 3, 4 and 5, 6, 7° 8 at A and BK are the deepest. They were spaced 50 meters apart from each other.

The target ground was embankment from the surface to 85 cm, clay sill from 310 cm to 450 cm, and sand from 9 to 450 cm.

As can be clearly seen from the results in the table, the boundary of the chemical injection range can be clearly seen at pole d).

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of a swivel according to the present invention, a palanquin 2.
．． FIG. 6 is a sectional view of the connecting rod, and FIG. 4 is a vertical sectional view showing the entire positional relationship of the foot measuring terminals at the fixed point of Tear II. 1...terminal, 5'...cable conduit, 6.
...Cable connector, 15...Two arm entrances,
16...Connection rod, 19...Electrode connection rod, 20...Electrode 1st figure 2nd Z3Σ

Claims (1)

[Claims] (a) An electric circuit is connected between one or more electrical signal terminals provided on the swivel head and a cable connector located at the center of the lower end of the swivel via a sliding brush and a cable. Closed swivel, Φ) A connecting piece rod consisting of a cable conduit with cable connectors at both ends placed in the sleeve of a concentric double pipe, (C) A cable conduit with cable connectors at both ends arranged in a concentric double pipe. A chemical liquid injection range confirmation device, characterized in that a connecting rod with an electrode is disposed in the sleeve of a heavy pipe and connects an electrode on the outer wall of the pipe and a lead wire led from the cable, and is connected as appropriate.