KR20020005891A - Method for reinforcement of reclamation land filling up waste material and its apparatus - Google Patents

Abstract

PURPOSE: A device and a method for reinforcing the buried layer of a waste landfill are provided to increase the strength of a soft ground of a landfill at a lost cost. CONSTITUTION: A plurality of injecting tubes(3) are put into a filling bag(1) made with compound fabric or hemp cloth. The mouth part of the filling bag using a band(5), and the injecting tubes are fixed. The middle portions of the filling bag is bound with fine wires(2) to form multi-layer filling portions(1a). A hook(4a) is formed in the lower end of a measuring tape exposed on the ground(4) and wound on the lower portion of the filling portion. The filling bag is placed in a vertical tunnel. Gel type filler material constituted of fly ash 60-70wt%, cement 30-40wt%, water and a blending agent is injected to the injecting tubes. After the filler material is cured, the upper ends of the filling bag and the injecting tubes are finished.

Description

Method for reinforcement of reclamation land filling up waste material and its apparatus}

The present invention relates to a reinforcement method and a device for creating a stable base for installing facilities such as roads by increasing the strength of the ground where the buried layer is soft like a landfill.

Landfills that are reclaimed with trash, like general soft grounds, have very low internal strength and elasticity, which makes them unsuitable for foundations such as roads and buildings.

The bearing strength reinforcement for waste landfill can be applied to pile method, crushed-pile method and cement soil injection method developed for general soft ground. The general soft ground reinforcement method, like the foundation piles made of PC, increases the bearing capacity and suppresses the ground subsidence by transferring the load to the hard ground of the pile, and based on the specific applicability and structural differences, the pile slab method and pile It can be divided into cap method and pile net method.

The piling method is to lay the foundation by ruddering or embedding columnar reinforced concrete piles in the ground, but it has reinforcement effect on the cohesive or sandy soil without crack in the soft ground, but it is not suitable for cracked soil with cracks in the ground. Do. So, recently, when the perforated hole with a plurality of perforated holes is entered into the perforated shaft, aggregates such as crushed stone and gravel are put into the perforated pipe, and the filler is forced into the perforated hole of the perforated pipe. Filling of filling material that penetrates into cracks of cracks is broken.

Filler injection method is the so-called single-tube rod method or double-tube double packer injection method in which a single perforated pipe or two or more perforated pipes are built into the ground drill cavities, and the manufacturing cost of the perforated pipes is not great, the manufacturing equipment cost is enormous, and the reinforcing work is slow. Therefore, the cost loss due to air delay is also large.

And, unlike general soft ground, general filling material injection method has large elasticity of buried layer and microcavity is developed in the ground. Therefore, even if it is tried to reinforce the ground with only filling material injection method, water glass and cement are consumed excessively, which increases the construction cost. In addition, the reliability of the ground reinforcement work was low because the filling material that escaped around the perforated pipe did not effectively penetrate into the gap of the buried layer due to the pressure of the cold gas and the high water pressure.

It is an object of the present invention to increase the safety of roads and constructions according to securing sufficient bearing capacity in landfills, to reduce reinforcement work costs, and to reinforce the landfill layer of waste landfills with excellent air shortening effect, and a simple structure reinforcement device particularly suitable for this method. To provide.

According to the present invention, the lower end of the rugged and cheap long-length textile filling bag made according to the diameter of the vertical shaft to be drilled in accordance with the reinforcement design of the landfill layer of the waste landfill is bundled and sealed with the same binding means, and in the filling bag at the filling part of each stage in the ground. Insert the filler injection tube leading to the top of the filler sack enclosed with a band to fix the infusion tube, and in the middle of the filler sack is loosely wrapped around the belt like a belt around to secure a multi-stage filling part in the longitudinal direction, each The underside of the live parts is provided with a landfill layer reinforcement for landfills covering a given noose at the bottom of a long strip of ground.

The present invention also provides a vertical shaft drilling step of drilling a vertical shaft with a predetermined pore size and depth at a suitable interval according to the ground reinforcement design in a landfill layer of a waste landfill, a first step of building a filling bag into the vertical shaft, and the filling bag. Ground treatment method of landfill, characterized in that the second step of injecting and bulging the filling material by using the individual injection tube, and the third step of finishing the upper end of the filling bag exposed to the ground after curing the filling material Therefore, it provides a reinforcement method for increasing the bearing capacity of waste landfills that can be expected to combine the improvement of the surrounding ground by the pile support and pile expansion.

In addition, this method is environmentally friendly because there is no slime at the time of pile laying, low noise and no vibration method, and it is expected to be applied in terms of recycling waste because it uses industrial ash as the main material of PG pile. .

1 is a perspective view of a landfill layer reinforcement device of a landfill according to the present invention

2 is a longitudinal sectional view of a bag

Figure 3 is a longitudinal cross-sectional view of the filling bag according to another embodiment of the present invention

4 is a partial cutaway front view of the knurled tube

5 is a cross-sectional view of the case where the filling bag is inserted into the vertical shaft in which the bottom of the waste landfill layer is reinforced.

Figure 6 is a cross-sectional view of the filling bag tofu after reinforcement for the landfill layer

<Explanation of symbols for the main parts of the drawings>

a: landfill layer b: vertical shaft

1: Charging bag 2: Middle bundle wire

3: injection tube 3a: unitary perforated tube

3b: Node-assembled perforated tube 3c: Outflow hole

3 ': long single injection tube 3 ": auxiliary injection tube

4: bar 4a: noose

5: fastening means for the bottom seal 6: upper band

7: cap 8: stopper

[Structure of charge base]

1 and 2, the landfill layer reinforcement device of the landfill is a long filling bag (1) and the middle bundle wire (2), the injection pipe (3), the scale line (4), the bottom binding unit (5), And an upper band 6.

The filling sack 1 is made of fabric such as a synthetic fiber or hemp, and its length is longer than the depth of drilling of the vertical shaft to be drilled in the landfill layer, and when it is unfolded, the planar area is wider than the average cross section of the vertical shaft. Pressure to allow compaction of the subterranean tissue.

In the filling bag (1), the filling material injected from the ground by inserting a plurality of injection pipes 3 having different lengths from the upper end to the filling bag (1) and the lower end to the individual filling parts (1a) are inserted. (3) through the filling part (1a) to be evenly filled, the upper end of the filling bag (1) is tied to the band (5) to fix all the injection pipe (3) at once.

The injection tube 3 is lengthened as the charging section 1a is positioned deeply. In particular, the longest injection tube allows the bottom of the vertical shaft to reach the bottom of the vertical shaft when entering the filling bag (1).

On the outside of the filling bag 1, the middle middle thin wire bundle 2 is loosely wrapped like a belt to form a multistage filling part 1a having a narrow waist. The middle bundle wire (2) is to help the snares covered by the charging section is peeled off and the filling bag (1) can be inserted smoothly without touching the gang wall of the vertical shaft.

In addition, the scale line (4) forms a multi-stage charging part (1a) to measure the length of the vertical line enclosed in the vertical shaft as the noose of the scale wrapped around it, and to determine the filling amount of each vertical section by the depth of the vertical shaft After inserting safely into the vertical shaft while the filling material is charged in the filling bag (1) and the filling pressure exceeds a certain level to break the middle bundle wire (2) to ensure that the filling is made smoothly.

The waste landfill layer may have different strengths for different depths, and the weaker the layer is, the larger the filling amount of the filler c is, and therefore the swelling width of the filling unit 1a is also increased. By the way, it is difficult to grasp how much the amount of filling of the filler (c) for each charging section. The scale line 4 relieves this problem.

That is, any filling part 1a is expanded in proportion to the injection amount of the filler c. In this way, when the charging part 1a is expanded, the noose 4a is increased, and the length of the portion remaining on the ground is gradually shortened because the scale 4 is enclosed in accordance with the length of the noose 4a. Check the length of the scale (4) before entering the ground, and compared with the length of the remaining portion on the ground after the filling is completely filled, it is possible to determine how much the filling amount per filling part and how thick it will be.

In FIG. 3, the injection pipe 3a has a length comparable to that of the metal vertical shaft and a long metal or resin single hole tube having a layered layer having a perforated filler outlet hole 3c so that the filler can be discharged to a portion close to the surface. It may be replaced by (3a). In this way, the work can be done with one injection tube compared to embedding several long and short injection tubes (3) at once, thus reducing the cost and convenience of work due to the reduction of the quantity of the injection tubes.

Or, as shown in Figure 4, if the prefabricated steel perforated tube (3b) having an outlet hole (3c) so that the connection pipe 3 can be used to connect nodes can be effectively used as a single hole injection tube assembled in accordance with the depth of the vertical shaft have. At this time, the upper part of the prefabricated steel perforated pipe (3b) is filled in the process of injecting the filling material using a single injection pipe (3 ') long enough to reach the bottom of the filling bag (1), and the long injection pipe (3'). Cap (7) capable of simultaneously inserting a short pipe type auxiliary auxiliary injection pipe (3 "), which allows air of the bag (1) to be smoothly discharged out of the vertical shaft and, if necessary, also used for filling the filler at a low depth. Cover and seal the upper end of the filling bag 1 with the band 6. Also, in order to prevent the filling bag 1 from being damaged even when the bottom of the hole pipe 3b and the filling bag 1 come into contact with each other, the lower part of the filling bag 1 is sealed. Cover the stopper (8).

[Reinforcement Method of Garbage Landfill Layer Using Charger Column and Filler]

1st process

In FIG. 5, the vertical shaft b is drilled at the corresponding point of the landfill layer a that requires reinforcement. The depth, pore size, and gap distance of the vertical shaft (b) are preliminarily investigated in advance and drilled with a drilling tool based on the design created based on the findings.

2nd process

After grouting (d) the filler on the bottom of the vertical shaft (a), the filling sack (1) made in advance according to the depth and pore size is inserted.

3rd process

60 to 70 weight% of fly ash and 30 to 40 weight% of cement are mixed, and the gel filler which mixed admixtures, such as water and an expansion agent, is formed, and it inject | pours into the injection pipe 3. The preferred injection pressure of the filler is 2-7 kg / cm 2.

Fly ash is coal ash, which is a waste generated from thermal power plants, steel mills, etc., and is used to sift waste fly ash or bottom ash to select a certain level of particle size.

Filling material (c) is sequentially injected from the injection pipe (3) of the deepest part of the charging section (1a) to the lowest charging section injection tube. For example, the filling material is filled to the uppermost charging part by filling the lowermost charging part so that the middle bundle wire 2 bursts, and then filling the filling material c as much as possible with the same tips.

In the case of the node-assembled perforated tube 3b, the filler is first drawn from the bottom to the top by using the injection tube 3 ', and then drawn to the ground, which is difficult to operate due to the length of the ground, which is difficult to operate, or the strength of the surface of the landfill layer is lower. When more demand is required, the filler is filled using the auxiliary injection tube (3 "). When filling the filler into the injection tube (3 '), the air in the upper filler bag (1) of the injection filler is filled with the filling amount. It is pushed out and discharged into the auxiliary injection pipe (3 ") so that the filling operation can be efficiently performed.

The middle bundle wire 2 of the filler bag 1 is no longer held and breaks and the snare 4a opens when the pressure received when it expands according to the filling level of the filler reaches a certain level. As the noose 4a opens, it pulls the scale 4. Then, when the scale 4 is no longer moved, it can be seen that the filling part has reached a full state so that no filler can be inserted into it.

4th process

Wait for the filling material to be fully filled and cured, and then cut off the exposed part of the filling bag (1) and the injection pipe (3), or install a die (f) shaped like a top over the ground and the base, and the upper part of the filling bag (1). The exposed part is finished by embedding with concrete mortar (e).

These piles will appear in the shape of atypical piles generally on the premise that variables such as the strength, properties, leachate underflow, and gas pressure of each type of waste exist.

As described above, the present invention has a long fabric filling bag, which is fixed by inserting a plurality of injection tubes leading to a layer filling section by enclosing a noose of a scale on the surface of a multistage filling section, is embedded in garbage in a vertical shaft which is perforated in a soft landfill layer for various reasons. It builds piles for foundation foundation by injecting fly ash and cement mixture through the injection pipe, and it is possible to cheaply construct strong and robust underground piles using low-cost raw materials and pile fly ash or pile ash. It is also used as a building material to help solve pollution problems.

In addition, since the packed bag of dense structure adheres to the entire vertical shaft by the filling pressure of the filling material, the surface of the main shaft friction against the vertical shaft wall is taken into the gap of the landfill layer in the landfill layer under the worse conditions than the general soft ground. Due to its high overload capacity, it can be used to build stable ground for installation of facilities such as buildings and roads.

In addition, it is easy to estimate the pile appearance and the success of reinforcement work with the eye mass of the filling amount of each position in the vertical shaft, which is difficult to check with the naked eye.

Claims (8)

A plurality of injection pipes 3 are placed in the synthetic fiber or hemp filling bag 1, and the injection pipe 3 is fixed by bundling the band around the mouth 5 with the middle of the outer surface of the filling bag 1. It is characterized by being tied with a thin wire (2) to form a multi-stage charging section (1a), and forming a noose (4a) at the bottom of the ever-exposed ground (4) to surround the bottom of each charging section (1a) Landfill layer reinforcement of landfills. 2. The landfill layer reinforcement device for a landfill of claim 1, wherein the injection pipe (3) is a long pipe and has a perforated pipe (3a) in which filler outlet holes are drilled from the lower end to the upper end. 3. The landfill layer reinforcement apparatus of claim 2, wherein the perforated pipe (3a) is composed of several nodes, and the knot-assembled perforated pipe (3b) is used by connecting these nodes to the depth of the gang. [4] The cap assembly type hole tube (3b) is a cap having an injection hole (3 ') that is lowered near the lower end of the hole tube in the upper portion and an insertion hole for inserting the manipulator-type injection tube (3 ") of the short tube at the side ( 7) Landfill layer reinforcement device for landfills covered with caps (8) covering the lower end of the lowermost section with a covering bag. A first step of drilling a vertical shaft at a corresponding point of a landfill layer requiring reinforcement work; A second step of filling in the vertical shaft a filling bag made beforehand according to its depth and pore size; A third step of injecting and solidifying a gel filler containing water and a admixture added to 60 to 70% by weight of fly ash and 30 to 40% by weight of cement into an injection tube of a packing bag; After the filler is cured, landfill layer reinforcement method for a landfill layer, characterized in that the fourth step of finishing the top of each of the filling sack and the injection tube exposed to the ground. 6. The method of reclaiming landfill layers for landfills according to claim 5, wherein the bottom of the vertical shaft is grouted with a filling material to reinforce the ground. The landfill layer reinforcing method for landfills according to claim 5, wherein the filling material is fly ash or coal ash which is coal ash. The method of claim 5, wherein the filling material is cement.