JPS5918812A - Grout injection tube device - Google Patents

Abstract

PURPOSE:To confirm the injection range of a grout by connecting a swivel closing an electric circuit, a triple-injection tube provided with a cable conduit, and an injection tube rod having an electrode connected to its outside. CONSTITUTION:A grout injection tube device in which a swivel having a terminal 1 connected with a cable connector through a rotary terminal 3 and a brush 4 on its head and a middle tube 5 and an inner tube 9 are water-tightly supported is connected to an injection tube rod and an injection tube rod with an electrode is penetrated into a place different from a grout injection port A. Under a condition that voltage is applied between A-B and between A-C, a grout is injected and electric resistances at each measuring terminal are measured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chemical liquid injection tube device having a current generation function for measuring a chemical liquid injection range.

The chemical injection method for ground (2) is rapidly developing because it is an effective method for increasing the strength of soft ground or stopping water.

However, since various factors are involved, such as the complexity of the ground layer to be constructed, groundwater trends, types of injection chemicals, injection pressure, injection method, and differences in gel time, it is difficult to accurately judge the injection situation. This is difficult, and although various studies and reports have been made on how to confirm this, there is no perfect technique yet.

In view of this point, the present inventors conducted various studies on means for confirming the permeation range of the injected chemical solution, and arrived at a chemical solution injection tube device equipped with a current transmission function.

That is, the present invention provides a chemical injection pipe device used for soil improvement, in which (a) one or more terminals provided on the swivel head and a cable connector located at the center of the lower end of the swivel are connected to a sliding brush; (b) An injection pipe rod consisting of a cable conduit with cable connectors at both ends arranged in a concentric triple tube sleeve; (c) Cable connectors at both ends. A cable conduit equipped with a cable conduit is placed in the armpit of a concentric triple pipe, and an electrode-equipped injection pipe rod is connected as appropriate by connecting an electrode on the outside wall of the pipe and a lead wire led from the cable. The present invention relates to a chemical liquid injection tube device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the chemical liquid injection tube device of the present invention will be specifically described below with reference to the drawings.

Figure @1 shows a sextuple pipe swivel, in which a plurality of terminals 1 are provided at the head of the swivel and insulated from the surroundings by an insulator 12. This terminal 1 is connected by a sliding brush 4 to a rotating terminal 6 provided on the outside of an electrode spindle 2 which is rotatable around an axis inside the tube portion and held watertightly. A lead wire is pulled out from inside the terminal 3 (not shown), and a cable conduit (not shown) provided at the end of the swivel shaft is connected to a suitable connection terminal such as a cable connector at the lower end of the swivel. is connected to.

The middle tube 5 is intended to ultimately form a fluid flow path 7 between it and the swivel mantle tube 6, and its top portion forms a closed path above the fluid intake port 8. There is.

A coaxial inner tube 9 is disposed inside the middle tube 5, forming a second fluid flow path 10 between it and the middle tube 5, and the top portion of the inner tube 9 is connected to the second fluid intake port 11. The upper part also forms a closure.

Middle tube 5 and inner tube? 1, 0-ring 16. It is rotatably or watertightly supported by a ball bearing 14, a U-cup 15, and an oil seal 16.

The ends of the swivel outer tube, middle tube, and inner tube each have a plug or socket for connection to the injection tube rod (six-fold tube).

If a slight margin is allowed in the length of the connecting portion at the end of the cable, such as a cable connector (not shown), it will be easier to connect the cable connector when connecting the injection pipe rod.

Although FIG. 2 shows the injection pipe rod 17, the illustration of the cable conduit in the sleeve is omitted to simplify the drawing. Outer tube 18, middle tube 19, and inner tube 20 that constitute injection tube rod 17
0 Both end edges are processed with sockets and plugs so that they can be connected to other parts in a continuous manner.

FIG. 6 shows an electrode-equipped injection tube rod 22 in which an electrode 21 is provided on the outer wall of the injection tube, and as in FIG. 2, the illustration of the cable conduit is omitted. In this case as well, the ends of the actor tube, middle tube, and inner tube that make up the rod are socketed and plugged in the same manner as in FIG. 2.

In the case of Fig. 3, one lead wire led out from the cable conduit passes through the middle tube and extends to the outer tube, and is connected to the electrode 21 end A on the outer wall of the outer tube. ing.

When using the swivel and injection pipe rod as described above, for example, the injection pipe rod as shown in Fig. 2 is approximately 150 m long,
Prepare the 1110-meter connector with electrodes shown in Figure 3 with a length of about 50 cm. (It is possible to inject the chemical liquid in the desired condition 1).In order to operate the electrolytic machine for measuring the injection range of the chemical liquid, for example, a swivel is installed on the head. Connect an external power supply to terminal 1 and apply an appropriate voltage (e.g. 6 to 12 VA degrees).
A stream flows from the pole to the instep 1 and the vl inside.

Therefore, 79 which captures this current at 1 (0) elsewhere
By arranging the electrode separately, it is possible to easily adjust the chemical injection mode according to the size of the chemical injection area (or layer thickness) and reduce the air resistance. The effect of confirming the medicinal liquid according to this invention?-E human range v0 will be explained below based on an example in which an actual ψ-scale injection test was conducted8. Insert confirmation devices B and C into locations with a certain distance between them, inject the chemical solution with voltage applied between A and B and A and C, and measure the electrical resistance at each measurement terminal. is shown on the clothes.In addition, A
-B is 1m, A-C is 75α, the deepest part of each rod is 4.5m from the ground, measurement points 1, 2 at B and C. 4 and 5.6.7.8 are 50 from the deepest part.
There is a gap between crn addresses. The target ground was embankment from the surface up to 85 crn, clayey soil up to 510 crn, and medium sand up to 450 crn.

As can be clearly seen from the results in the table, the boundaries of the chemical injection range can be clearly understood.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the swivel according to the present invention, FIG. 2.6
The figure is a sectional view of the injection tube rod, and FIG. 4 is a longitudinal sectional view showing the positional relationship of the measurement terminals at the measurement point. 1...Terminal, 5...Middle tube, 8...Fluid intake port, 9. -, inner tube, 11... fluid intake port, 17... injection tube rod, 22... injection tube Rondo with electrode 1st [! 1 Figure 2 No. 31!1

Claims (1)

[Claims] In a chemical injection pipe device used for ground improvement, (,) one or more terminals provided on the swivel head and a cable connector located at the center of the lower end of the acid swivel are connected by a sliding brush. (b) An injection pipe rond consisting of a cable conduit with cable connectors at both ends placed in the sleeve of a concentric sextupled pipe; (c) A swivel with a cable at both ends. A cable conduit equipped with a connector is arranged in the arm of a concentric sextuplet pipe, and an injection pipe rod with an electrode is connected as appropriate by connecting an electrode on the outside wall of the pipe and a lead wire led from the cable. Chemical liquid injection pipe device.