JPS5988526A - Wet type regulating mechanism of grout - Google Patents

Abstract

PURPOSE:To effectively obtain a desired grout by a method in which an inlet port for a solid-dispersed liquid and a charging port for hard granules are provided on the upper part of one side of a cylindrical treatment chamber, a charging port for hard granules is provided on the bottom, and an overflow port for treated materials is provided on the upper part of the other side of the cylindrical treatment chamber. CONSTITUTION:A cylindrical treatment chamber 1 is provided on a machine base 10, and a rotary shaft 2 provided with plural discs 3 is provided sidewards in the chamber 1. On the upper part of one side of the chamber 1, an inlet port 4 for a milky substance formed by dispersing a solid, e.g., ordinary Portland cement, etc., in water, etc., and a charging port 5 for hard granules, e.g., cut wire pieces, steel balls, etc., are provided. On the bottom of the chamber 1, an outlet port 6 for the hard granules is formed, and an outlet port 9 for grout and an overflow port 8 are formed through a filter 7, e.g., wedge wire screen, etc., on the upper part of the other side of the chamber 1. A desire grout can thus be obtained, and the condition of the grout in the construction work can be properly adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the invention of a grouting agent wet adjustment mechanism, and aims to provide a mechanism that can industrially advantageously adjust grouting agents using cement, etc. for ground improvement in civil engineering and construction. It is something.

Grouting methods have been used 81 times in the past for the purpose of strengthening the ground or stopping water in civil engineering and construction, but cement grout is the most representative method of grouting, and with the regulation of chemical grouting, it has become increasingly popular. It is being done.

However, the particle distribution of ordinary Portland cement used as cement grout is approximately 5 to 901 x m.
, the average grain size 1)*o is about 20 iim, and when such ordinary cement grout is actually injected, there is a particle size injection limit for the fine gap ground, and the fine gap is It is generally known that it is difficult to manage these problems because it is not possible to inject light at a high level, and separation occurs during injection handling, and precipitation and dehydration are likely to occur.

Therefore, instead of injecting such Bortland cement as it is as a grouting agent, some fine particle cement is manufactured for this grouting purpose, and this cement has an average particle size o of 6 to 8 μm1 Blaine specific surface area is about 6,300 to 8,200 crl/f, and it goes without saying that the grout adjusted accordingly has a certain improvement in the injection characteristics for the above-mentioned ground slits. However, this fine particle cement has been made finer by the cement manufacturer under special dry conditions and requires a considerable amount of man-hours, so it is expensive, ranging from several to ten times as expensive as ordinary cement. The grouting may not be fine enough or may be excessively fine compared to the size of the grouting area, so it is not necessarily possible to carry out joint construction. In addition, a certain amount of consideration must be given to its storage and management, and the above-mentioned microfabrication process, which requires a large number of steps under dry conditions, is also contrary to the purpose of energy conservation.

In view of these circumstances, the present inventors proposed that the grouting agent made from ordinary cement be injected while being micronized under wet conditions.
726, Japanese Patent Publication No. 57-33613). This method is as described above in 1). is about 20 μm, it is possible to reduce the cement particles to 5 μm or less, especially 2 to 3 μm,
The resulting slurry has excellent properties such that the generation rate of supernatant water is 10% or less after standing for 30 minutes, and is extremely effective as a grouting agent as described above, and can be used without using special cement. Injection construction can be carried out efficiently. However, according to the results of actual operation of various refining equipment for such grout adjustment, it has been found that during the refining process, hard granular materials (short and small cut pieces of beads or wire rods) have a filling rate when left still. It is necessary to use 50% or more, especially 60% or more, of fjkK, and on the other hand, it is preferable to process by supplying new material while sequentially discharging the material that has been subjected to a predetermined refinement through K filtration. ,
Due to the micro-mass processing, the hard granules mentioned above are also crushed and powdered, and it is not easy to effectively separate them from the cement slurry and take them out, even if they are filtered through a filter material. Clogging occurs within a short period of time, making it impossible to obtain a desired separation, and it is also difficult to charge the hard coarse phase and cement milk or to discharge the worn out hard granules in an effective manner.
In any case, it is not possible to obtain an industrially desired grouting agent using τ.

The present invention was devised after much detailed practical study and speculation in view of the current situation. At the same time, a charging port for the solid dispersion to be atomized and an inlet for the hard granules are formed in the upper part of the cylindrical processing chamber, and a hard granule inlet is formed in the bottom of the cylindrical processing chamber. The present invention proposes to provide a discharge port for the grout and to completely form the treated grout at the upper part of the other side of the cylindrical treatment chamber through a filter material. A tapered perforation is provided in a perforated disc, and the discs are arranged in combination with the chi and horizontal directions of the perforation being opposite to each other.

That is, to explain a specific embodiment of the present invention shown in the attached drawing 6, a cylindrical processing chamber 1 is provided on a machine stand 10, and a plurality of disks 3 are installed in the cylindrical processing chamber 1. The installed rotary shaft 2 is horizontally supported rotatably by ground/arm supports 12 provided on both sides of the processing chamber 1.
A pulley 20 is attached to one end of the rotating shaft 2.
A belt 15 is suspended between the rotary shaft 2 and a motor 14 mounted on one side of the machine base 1o to rotate the rotary shaft 2 and the disk 3 at high speed. On one side of the above-mentioned cylindrical processing chamber 1, an inlet port 4 is formed at the upper side, through which a milky substance made by dispersing a solid such as cement in a liquid such as water is sequentially introduced. , the upper part is provided with a charging port 5 for hard granular materials such as cut wire rods, steel balls, ceramic or porcelain granules, and the bottom part is used to store the hard granular materials (including damaged parts). A discharge port 6 is formed, and an Opafluoro 8 is provided at the upper part of the other side of the cylindrical processing chamber 1 via a sea urchin wire screen or other filtering material 1, and on the side of the Opafluoro 8 there is a processed material. A grout outlet 9 has been formed.

As described above, the disk 3 disposed on the rotating shaft 2 is provided with a perforation 22 in which the diameter 21 is formed as shown in FIG. 2, but these disks are on one side of the rotating shaft 2. On the injection side, a chi 921 is formed so as to be narrow in the other 111 direction, and on the other side from the middle part, that is, at the discharge 9j11, a taper 21 is formed so that the injection side becomes narrower. Further, the outside of the cylindrical processing chamber 1 as described above is a jacket type water cooling chamber 16,
The water cooling chamber 16 has a cooling water inlet 16a and its outlet 16.
3, the size of the hard granules mentioned above is generally KO, 7~
It is about 2.4 mm, and this is the light filling rate (Fb%) 5
It is operated at 0% or more, especially from 65 to 100%.

To explain an operation example of the mechanism of the present invention as described above, eight disks 3 made of chromium steel with a diameter of 235 m and a thickness of 15 mm are arranged in a cylindrical processing chamber 1 with an internal volume of 501 as shown in FIG. The disk 3 is rotated at 700 to 800 rpm to produce cut wire rods with a filling rate of 80% (0.8 to 1.5).
At the same time, a milk-like substance with a cement water ratio (C/W) of around 1:3 made of ordinary Portland cement prepared in advance in a general mixer for stirring was added to the mixer.
Refinement treatment was carried out while feeding the material while adjusting the speed of t/-.

The treated grout obtained from Overflow 8 has an average length of 1217 m, and the grout that flows upward to the filter medium 7 and is filtered out is completely free of contamination with purchased granule fragments, etc. Therefore, it does not cause clogging or the like, since it can be easily removed due to vibrations caused by the rotation of the disk. Continuous operation for several hours is possible, and the average particle size is i1..==22./L?++.
After the Biltland cement was subjected to the micronization process for an average of 2 minutes, it was micronized to a diameter of 2 to 3 μm.

In addition, the supply amount iJ', 3 for the wear and tear of the cut wire ladle
．． 2 Ky/hr, and the average abrasion rate tit of the disk 3 after 150 hours of operation was around 50%, making it possible to carry out the preferable refinement treatment.

According to the present invention as described above, cement powder can be effectively atomized in a wet process to obtain a preferable grouting agent, and in particular, it is possible to prevent clogging in the filter during continuous operation. This invention is industrially very effective because it allows finer grouting to be carried out on a daily basis and allows for appropriate adjustments to be made in response to the grouting work conditions at any time, such as at a construction site.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical sectional view showing the general structural relationship of the adjustment mechanism according to the present invention, and FIG. 2 is a cross-sectional view of the rotating shaft and disk portion thereof. It is a diagram. In these drawings, 1.1 is a cylindrical processing agent, 2 is a rotating shaft, 3 is a disk, 4 is a milky material inlet, 5 is a hard granule material inlet, 6 is an outlet, 7 is a filter material, and 8 Keopafluoro, 9 is grout outlet, 10 is machine base, 21 is Teno? , 22 indicate perforations. matter / matter

Claims (1)

[Scope of Claims] 1. A rotating shaft with a plurality of disks disposed in a cylindrical processing chamber is horizontally mounted, and a charging port for a solid dispersion to be atomized is provided above -1ll11 of the cylindrical processing chamber. An inlet for hard granules is formed at the bottom of the cylindrical treatment chamber, and an outlet for the hard granules is provided at the bottom of the cylindrical treatment chamber, and the treated grout is fed into the upper part of the other side of the cylindrical treatment chamber through a filter. A grout wet type VT4 adjustment mechanism characterized by forming an overflow. 2. A disc as set forth in claim 1, wherein a tapered hole is provided in a screw disk disposed on a rotating shaft, and a disk is disposed in combination with a disk having a direction opposite to that of the hole. grout wet type