JPH02167995A - Earth-pressure shield surplus-soil removal method using high moisture-content muck treating agent - Google Patents

Abstract

PURPOSE:To construct a smooth disposal system by force-feeding excavated muck up to a ground soil-sand hopper under the state of high moisture, adding a high moisture-content muck treating agent and an assistant and kneading and agitating muck. CONSTITUTION:Much excavated by a shielding excavator 1 is carried out by a screw conveyor 9 from an earth pressure chamber 8, and force-fed to a kneader 18 installed onto a soil-sand hopper 17 through a sludge pump 15 and a soil-sand force-feed pipe 16. A high moisture-content treating agent, which mainly comprises neural inorganic salt and with a water-soluble special polymer is compounded, is agitated and mixed together with high moisture-content muck from a high moisture-content muck treating agent feeder 19 and an assistant such as slaked lime powder from an assistant feeder 20 respectively. Muck is discharged and stored in the soil-sand hopper 17 from an exhaust port 23 while the thickening properties, reinforcing properties, setup properties, etc. of the treatment and assistant are held, and the soil and sand are extracted successively and carried out to a transport car 25 such as a truck as surplus soils removed. Accordingly, excavated muck can be treated efficiently at low cost.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention provides a method for disposing of residual soil using an earth pressure shield, in particular, by using a sludge pump (concrete pressure pump) to This invention relates to a method for disposing of waste soil that can be pumped.

``Prior art and problems to be solved by the invention'' Conventionally, this type of residual soil treatment method has been used.

Generally, the excavated waste generated by the shield face is transferred to the waste toro using a belt conveyor screw earth removal device.
The material was transported to the mine entrance and then transported to the ground using Talamusiel, Telha cranes, overhead belt conveyors, etc.
Export equipment was expensive and inefficient.

The excavated waste has a high water content or contains clay, so it is stored in a shaft waste bit or a sand hopper in a state where drainage is difficult. Furthermore, as industrial waste, there were problems such as limited disposal locations.

In addition, highly water-containing waste soil was improved at the treatment site by mixing quicklime and cement-based improvers, drying it in the sun, etc. until it could be transported by dump truck.

"Means for Solving the Problems" In order to solve the above-mentioned conventional problems, this invention pumps excavated waste in a high water content state to an above-ground soil hopper, adds a high water content waste treatment agent or an auxiliary agent, and By kneading and stirring the waste in a kneading machine, the pumped earth and sand has properties such as thickening, strengthening, and solidifying properties, and is stored directly in the earth and sand hopper, and can be transported as it is by dump truck. This paper proposes a series of waste disposal systems that can be used to efficiently dispose of residual soil even in urban areas.

"Embodiments" Below, embodiments of the present invention shown in the drawings will be described.
The Tonosho shield excavator l is configured such that a cutter rod 2 provided at its tip is rotatably supported by a rotating table bearing 4 via a shaft 3, and is rotationally driven by a drive motor 6 via a transmission mechanism 5. has been done.

A partition wall 7 is provided behind the cutter head 2, and an earth pressure chamber 8 is formed between the cutter head 2 and the partition wall 7.

A diagonal screw conveyor 9 whose tip opens into an earth pressure chamber 8 is installed on the partition wall 7, and the screw shaft is rotated by a drive motor 11 via a pinion 10 to transport high water content excavated waste to the rear. It is designed to be discharged.

A valve 12 is slidably provided at the discharge port at the rear of the screw conveyor 9 to adjust the amount of soil to be discharged, and the amount of soil to be discharged is adjusted by opening and closing the valve 12 with a hydraulic jack 13. It looks like this.

In this way, the sludge excavated by the cutter head 2 of the shield excavator 1 is transported from the soil storage chamber 8 to the screw conveyor 9 after adjusting the amount of soil discharged outside the machine, and is then transferred to the sludge pump 15 by the belt conveyor 14. be transported.

Then, the sludge is pumped from the sludge pump 15 through a sand pressure feeding pipe 16 to a kneading machine 18 installed on a sand hopper 17 .

The kneading machine 18 is equipped with a high water content shedding treatment agent feeder 19 and an auxiliary agent feeder 20 on a horizontal drum, and inside the kneading machine 18 there are left and right drums with a large number of stirring and feeding blades protruding around the periphery whose rotational speed is adjusted by a variable speed motor 21. A pair of paddle shafts 22 are installed so as to rotate in opposite directions while meshing their blades with each other, so that the remaining soil can be efficiently disposed of while changing the rotational speed according to the characteristics of the excavated waste. It is configured.

The high-pitched water slurry that has entered the kneader 18 is stirred and mixed by a pair of paddle shafts 22 together with the high water content treatment agent, auxiliary agent, or small amount of additives added from the high water content waste treatment agent feeder 19 and the auxiliary agent feeder 20. After maintaining its properties such as thickening property, strengthening property, solidifying property, etc., the discharge port 23
The soil is discharged into the earth and sand hopper 17 and stored there.

The earth and sand stored in the earth and sand hopper 17 is taken out one by one from the earth and sand hopper gate 24, and carried out to the outside of the site as normal treated waste soil by a transport vehicle 25 such as a gun truck.

The above-mentioned high water content treatment agent has a neutral inorganic salt as its main component,
A material containing a small amount of water-soluble special polymer or a material having performance as a sludge treatment agent is used.

Further, as an auxiliary agent, an agent such as slaked lime powder is used, which reduces the amount of the main agent added and maintains the reinforcing properties.

"Effects of the Invention" As described above, according to the present invention, the waste excavated by the Tonosho shield excavator has a high water content or contains clay, so it is difficult to drain water. Utilizing Bingham property, the sludge is continuously and efficiently pumped from underground to the kneading machine on the ground using a sludge pump, and the kneading machine reliably stirs and mixes the sludge with a high water content treatment agent, auxiliary agent, or a small amount of additive, which increases its properties. A simplified series of systems that can be discharged and stored in a sand hopper as ordinary surplus soil that maintains viscosity, reinforcement properties, solidification properties, etc., and then sequentially load it onto a transport vehicle for smooth disposal. This makes it possible to efficiently dispose of excavation waste at low cost.

[Brief explanation of the drawing]

The figure is a longitudinal sectional side view showing an embodiment of the invention. l...Earth pressure shield excavator, 9...Screw conveyor, 17...Sludge pump, 16...Earth pressure pipe, 17
... Sediment hopper 18.. Kneading machine, 19.. High water content waste treatment agent feeder, 20.. Auxiliary agent feeder 21.. Variable speed drive motor 22.. Paddle shaft rotating body, 24.. Transport vehicle.

Claims (1)

[Claims] 1) In the earth pressure shield residual soil processing method, the excavated waste generated from the shield face is pumped by a sludge pump to a kneader installed on the earth and sand hopper on the ground, and a small amount of a high water content waste treatment agent is added to the above-mentioned kneading. An earth pressure shield characterized in that the earth and sand is stirred and kneaded by a machine, and is discharged and stored in the earth and sand hopper as earth and sand that maintains thickening, reinforcement, solidification, etc., and is sequentially discharged and dumped into a transport vehicle below the earth and sand hopper. Surplus soil processing method.