JPH0351403A - Stabilizer - Google Patents

Abstract

PURPOSE:To shorten the term of work by providing a tank for stocking liquid solidifying agent emulsified or suspended and a pump for pressure feeding the agent to an orifice, and providing above or in front of a rotor the orifice for discharging the liquid solidifying agent. CONSTITUTION:A stabilizer 1 is provided with a tank 7 for stocking liquid solidifying agent 5 and a pump 8, and a rotor hood 2 is provided with a number of nozzles 3 each extending along the longitudinal direction of a collecting pipe 9. The solidifying agent 5 is injected to a rotor 4 by the pump 8 via the nozzles 3. Before the solidifying agent 5 is dispersed it is mixed with soil swept by a shank 6. The term of work can thus be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a road mixing type stabilizer.

[Background Art] Due to the dramatic increase in traffic volume in recent years, new roads are being built and existing roads are being extensively renovated.

Particularly recently, due to the increase in the amount of reclaimed land and the rising cost of land, there has been an increase in the number of construction projects being carried out in areas with poor ground. In such areas, ground improvement is essential.

In particular, roadbeds and roadbeds are parts that support traffic loads, and in paving work on soft ground areas, improvement of these parts is required.

As a method for improving this surface layer, for example, powdered hardening agents such as cement or lime are spread on the surface of soft subgrade soil,
Next, there is a method of mixing subgrade soil and a hardening agent to improve the bearing capacity of the subgrade soil. This construction method is called a stable treatment method, and will continue to be the main construction method in the future because it is suitable in terms of construction period, cost, and disposal of leftover soil.

In this construction method, a stabilizer is used to mix the solidification agent into the soil. The stabilizer is a surface ground agitator that runs on caterpillars or tires, and has a rake that can be lowered at the rear thereof. Here, an example of a conventional road mixing type stabilizer 51 is shown in FIG. This example employs a caterpillar 52 drive system. During work, the rotor 53 is lowered together with the rotor hood 54, the lower surface of the rotor hood 54 is set at the ground line, and then the height of the rotor is adjusted so that the excavation depth of the rotor 53 becomes a predetermined depth. If the powder solidifies 1PJ, 6iJ passes through this stabilizer.
It is distributed in stages. After that, it passes while rotating the shank 55 numbered on the rotor 53.

The rotor 53 is provided with a shank 55, and the rotation of the shank 55 crushes the soil clod and mixes the solidifying agent.

[Problems to be solved by the invention]However, in the conventional method of spraying the solidifying agent on the roadbed and then mixing it with the soil using a squabilizer, the solidifying agent is powder, so it is difficult to mix it with the soil. There was a drawback that the beginning and end would scatter. This is because stirring is required to sufficiently mix the ladle and soil. Even if mixing using a shank or the like is carried out inside a hood, the solidifying agent on the ground is rolled up by caterpillars or tires, and thus is inherently scattered. In addition, since it is a powder, it will be scattered by the influence of wind etc. when it is spread, and it will also suffer a considerable amount of damage when handled.

The scattering of this solidifying agent has no negative impact on local residents. That is, they not only stain the room by getting stuck in the laundry or entering the room, but also become troublesome to clean if they solidify.

In addition, in areas near fields, etc., it may be scattered onto crops, and it may not be possible to wash or remove it, resulting in a major blow.

Furthermore, if there is a construction site or a paint factory shade nearby, the scattered powder solidifying agent may adhere to objects that have not yet been cured or dried, causing contamination. In such a case, the practical problem is that the work cannot be done or the work has to be done at a very low efficiency, resulting in a significant loss.

In order to eliminate the drawbacks of powder solidifying agents as mentioned above,
Recently, solidifying agents made into lumps have also been devised and commercially available. Since it is compacted to the size of a soybean, it can greatly reduce scattering during handling and spraying. however,
Because caterpillars and tires pass through the second part after dispersion, and because it is designed to break down into powder to improve mixing, it is impossible to prevent the caterpillars and the like from rolling up the powder as they pass. Second, scattering cannot be completely prevented even during mixing.

Therefore, the present inventor has devised a method of dispersing a solidifying agent in a liquid state, and has also filed a patent application. In this method, since the solidifying agent is not in powder form, there is very little scattering of the solidifying agent.

However, even with this method, the solidifying agent must be separately sprayed, and as long as conventional stabilizers are used, it is not possible to shorten the construction period or reduce labor costs.

Therefore, there was a demand in this industry for a stabilizer that could shorten the construction period and reduce labor costs.

[A Thousand Steps to Solve the Problem] In view of the current situation, the present inventors have completed the present invention as a result of intensive research. The reason is that the outlet for spouting out the liquid solidifying agent is provided above the rotor of the stabilizer or in front of the rotor.

Here, the solidification agent may be any substance as long as it improves the ground by mixing with soil. Usually, they are Bolt, Run I, cement, cement solidifying agent, lime, etc.

An emulsion is a product obtained by mixing a solidifying agent with water and emulsifying it. Similarly, a suspension is one in which a solidifying agent is suspended. The mixing ratio of water and solidifying agent may be appropriately selected depending on the ground to be improved, the strength required, the ease of pumping, etc.6, and is not particularly limited. However, according to the inventor's experiments, a weight ratio of about 1:1 was suitable.

The outlet refers to an opening for spouting or flowing out the liquid solidifying agent filled in a tank or the like. The openings are provided continuously or intermittently with a length comparable to that of the rotor. For example, a plurality of nozzles may be arranged at appropriate intervals, or a water spray pipe may be installed with a large number of holes in the longitudinal direction.

In this case, the outflow port is the spout hole of the nozzle or the hole of the sprinkler pipe, but if the liquid solidifying agent is to flow out through a wide gutter-like object, it is the part at the end of the gutter where it flows down. do. The liquid solidifying agent is transported by gravity or under pressure by a pump, etc., flows out from the outlet by dripping or spraying, and is spread on the road. The outlet should be located above or in front of the rotor. That is, the location is not limited as long as it is in front of the shank for mixing.

For example, it is between the rotor hood, the low cooling hood and the stabilizer body, or the front part of the stabilizer body. However, it is preferred to provide it above the shank in the hood. In this way, since the spraying itself is dispersed, it is possible to prevent the solidifying agent from being unevenly distributed in one location. The forward direction is the direction in which the squabilizer travels while mixing on the road.

It is preferable to install a tank that stores the liquid solidifying agent, a pump that pumps it, etc. in the stabilizer body for reasons such as the freedom of movement of the stabilizer itself. You can. Alternatively, a truck or the like loaded with a tank or the like may be driven along the stabilizer, and the tank or pump may be connected to the nozzle or the like with a hose.

If the tank is installed in the stabilizer body, the capacity may be small, but in that case, go back to the fixed tank (the tank that liquefies the solidification agent or the tank that stores the liquid solidification agent) and add more. Bye.

It is also possible to permanently install a tank or bomb and supply the solidifying agent to the stabilizer with a hose from there. In this case, as long as the hose is delivered, only the stabilizer needs to be moved, and improvements to the stabilizer itself can be kept to a minimum.

[Examples] The present invention will be described in more detail below based on examples shown in the drawings.

FIG. 1 shows an embodiment of a stabilizer 1 according to the present invention, in which a nozzle 3 is provided on a rotor hood 2. A large number of nozzles 3 are provided in the longitudinal direction of the collecting pipe 9, and their ejection ports are located above the rotor 4 as shown in FIG. 2, and the liquid solidifying agent 5 is ejected from the ejection ports. Ru.

That is, the liquid solidifying agent 5 is injected onto the rotor 4 and mixed with the soil by the shank 6 as the rotor 4 rotates.

The amount of liquid solidifying agent used in this example was determined as follows. First, the weight of the powder solidifying agent required for each piece of ground is determined.

9 1 xO. 45xl. 5 x0.07xlOOOO=4
7.3kg/bot1: 1m (unit area) 0.45: Mixing depth from the ground surface (m) 1.5: Dry density of improved ground (ton/n?) 0.07: Mixing of powder solidifying agent Rate (kg/kg) This is determined experimentally from the required strength of the ground.

1ooo: unit conversion factor (kg/ton) In addition, the mixing ratio of the solidifying agent, water and cement, was 1=1 in terms of weight ratio, and was 1.3n per 1 ton of the solidifying agent. The required amount of liquid solidifying agent per In{ is 47.3x 1.3=61.5z /cd.

Therefore, it is sufficient to sprinkle and mix 61.56 times per 1 ground.

In actual experiments with this amount, very good results were obtained. That is, there was no scattering of the solidifying agent at all, and even if the ground itself contained water, it did not affect the running of the stabilizer.

FIG. 3 shows that the stabilizer 1 is provided with a tank 7 containing 10 liquid solidifying agents 5, and the liquid solidifying agent is pumped from a nozzle 3 provided in the hood 2 of the stabilizer 1 by a pump 8 similarly provided in the stabilizer 1. 5 is ejected.

In the stabilizer 1 according to the present invention, since the dispersion of the solidifying agent and the mixing by the stabilizer are almost simultaneous, the relationship between the amount of dispersion and the running speed becomes a problem.

The inventor's experiments were conducted as follows.

Pump discharge amount 200 1! /min, if the stabilizer rotor width is 2m, 200 ÷ 61.5 ÷ 2 - 1.62 m / min
becomes.

Therefore, the running speed of the squabilizer is 1.62 m/m.
It may be fixed to in. To fix the speed, just look at the tachometer that displays the rotation of the hydraulic motor and sprocket.

In order to further automate the process, it is also possible to detect the speed of the stabilizer (rotation speed of the sprocket, etc.) and control the discharge amount of the liquid solidifying agent using a control valve accordingly. If such a control method is adopted, the driver of the stabilizer can:
All you have to do is run completely freely, and the work is very easy.

Further, the motor of the discharge pump 8 may use a separate power source, but a hydraulic motor of a stabilizer may also be used.

FIG. 4 shows another embodiment of the present invention, in which an inclined plate 10 is provided at the lower part of the collecting pipe 9, and the liquid solidifying agent 5 is made to flow out through the inclined plate 10.

[Effects of the Invention] As explained in detail above, when the stabilizer according to the present invention is used, the fundamental advantage that the solidifying agent is liquid,
In other words, in addition to the advantage that it does not have a negative impact on the surrounding environment because the solidifying agent does not scatter, there is no need for a separate sprayer or spraying workers to spray the liquid solidifying agent, which reduces the construction period and reduces labor costs. It is possible to reduce the

[Brief explanation of drawings]

Fig. 1 is a side view showing one example of the implementation of the book opening, Fig. 2 is a schematic sectional view of a part of the rotor shown in Fig. 1, Fig. 3 is a side view showing another embodiment, and Fig. 4 The figure is a sectional view showing another example of a portion of the rotor, and FIG. 5 is a side view showing a conventional example. 1...Scabilizer 3...Nozzle 5...Liquid solidifying agent 7...Tank 9...Collecting pipe 2...Rotor foo 1 4...Rotor 6...Shank 8...Pump 10... Inclined plate

Claims (1)

[Scope of Claims] 1. A stabilizer characterized by having an outlet above or in front of the rotor through which the emulsified or suspended liquid solidifying agent flows out. 2. The stabilizer according to claim 1, which has a tank for storing the liquid solidifying agent and a pump for pumping the liquid solidifying agent from the tank to the outlet.