KR20010044812A - Net bag type fiber-concrete pile and construction method thereof - Google Patents

Abstract

PURPOSE: A composite ground development method of a mesh cloth bag type fiber concrete pile for improvement of a poor ground is provided to prevent cement concrete forming a pile from scattering, to complete the construction work of monofilament or filament concrete piles simply and safely, and to enhance the strength of the poor ground by composite ground development by installing flexible piles harmonizing with the strength of the poor ground. CONSTITUTION: A composite ground development method of a mesh cloth bag type fiber concrete pile for the improvement of a poor ground comprises the steps of putting a steel pipe(2) into a vertical hole(1a) bored though a poor ground(1), taking out a reticular mesh cloth bag(4) rolled in a scroll type at the lower end of the steel pipe and putting in the steel pipe in the state of binding a heavy weight(10) to the lower end of the mesh cloth bag, cutting after installing the mesh cloth bag to be longer than the top end of the steel pipe, interposing a concrete injection pipe(6) to the lower end of the mesh cloth bag, then pulling out the concrete injection pipe, pouring a fiber concrete(6a) mixed with a cement concrete(5), a monofilament(7a) or filament in an optimum ratio to fill up to the top end of the mesh cloth bag, and pulling out the concrete injection pipe and the steel pipe from the vertical hole successively, so that the fiber concrete gets to be a filament concrete pile including a monofilament concrete pile in the state of covering the fiber concrete with the mesh cloth bag in the vertical hole.

Description

Composite ground construction method and mesh bag pile fiber reinforced concrete pile for improvement of soft ground {NET BAG TYPE FIBER-CONCRETE PILE AND CONSTRUCTION METHOD THEREOF}

The present invention is a soft ground of the soft ground of the dredged soil, or a soft ground composed of unstable viscous soil such as coastal, riversides, tidal flats, ponds or swamps to install structures such as roads, complexes, and embankments. The present invention relates to a composite ground composite construction method of a mesh cloth fiber concrete pile and a mesh cloth fiber concrete pile for improvement,

The fiber concrete pile and the basic soft ground exhibit composite strength support by constructing and installing fiber concrete piles, which are the stepping stones of soft ground, using fiber concrete and mesh cloth, which are obtained by mixing short fibers or long fibers at an appropriate ratio with cement concrete. It is proposed to increase the strength of the soft ground and the support strength of the structure.

In general, the soft ground is saturated with a large amount of water in the viscous soil forming the soft ground, and the dependence of self-reliance is weak, and the ground is unstable. Therefore, the structure cannot be installed due to the weakness of external force and the strength of the ground. Due to the nature of mass consolidation and settlement, the concrete progresses over a long period of time, as well as to reduce the damage of structures installed on the soft ground over time due to the shear failure of the ground caused by the load of the structure. Reinforced concrete piles were built by directly installing reinforcement bars or wires.

Such conventional reinforced concrete piles require a separate manufacturing period, and in case of directly installing reinforced concrete piles directly on the soft ground, the installation cost increases because the type of the pile must be installed to reach a deep solid ground. There was a flaw.

In addition, in the proposed construction method, filed with a patent application No. 64382 dated October 31, 2000, cement is simply inserted into the inside of a mansard bag installed by a steel pipe inside a vertical hole drilled vertically in a soft ground. As a construction method that directly injects concrete only, cement concrete is precisely injected into the inside of the netting bag which becomes the inside of the vertical hole, so that the cement concrete is not lost more than necessary, but the concrete pile lacks resistance to bending stress or rupture stress. There was this.

The present invention is to overcome the shortcomings of conventional conventional dredged soil, soft ground consisting of unstable viscous soil, such as the shore, riverside, steel pipes and concrete injection pipe and rolled-shaped mesh cloth and cement concrete in short fibers or Filled with cement concrete to form a pile by installing the fiber concrete filled in a state surrounded by mesh cloth in the vertical hole by using fiber concrete for mixing the long fibers at an appropriate ratio to form short fibers or long fiber concrete piles. Strengthen the soft ground by installing a flexible pile that is in harmony with the strength of the soft ground by making it easier and safer to complete the construction of more flexible short or long fiber concrete piles while preventing the disturbance. Proposed for the purpose of improving .

1 is a rolled up rolled manpobag for improvement of soft ground of the present invention

Perspective view

2 is a perspective view showing a construction state of the present invention

Figure 3 is a cross-sectional view showing a state inserted into the steel pipe of the mesh bag of the present invention

4 is a state in which the concrete injection pipe is injected by cutting the mesh bag of the present invention

Shown section

5 is a concrete injection pipe is injected by cutting the upper end of the mesh bag of the present invention

Section showing the status

Figure 6 shows a state of completing the concrete injection into the inside of the mesh bag of the present invention

Cross-section

7 is taken out of the steel pipe in the vertical hole of the present invention to short fiber concrete pile

Sectional view of construction completed

8 is taken out of the steel pipe in the vertical hole of the present invention to the long fiber concrete pile

Cross section of the first embodiment in the construction state

9 is on the top of the short-fiber or long-fiber concrete piles of the construction of the present invention

Cross section of the second embodiment shown by installing the structure

10 is the construction of the short fiber or long fiber concrete piles of the present invention completed

Cross section of the third embodiment shown by installing a road (asphalt) on the top

Explanation of symbols on the main parts of the drawings

1: Soft ground 1a: Vertical hole

2: steel pipe 3: cover plate

3a: hinge 4: mesh cloth bag

5: cement concrete 6: concrete injection pipe

6a: fiber concrete 7: short fiber concrete pile

7a: short fiber 8: long fiber concrete pile

8a: long fiber 10: weight

100: base 101: foundation plywood

102 structure 103: drainage

104: boundary stone 105: road (asphalt)

The present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a rolled-type mesh cloth bag 4 for the improvement of the soft ground 1 of the present invention, Figure 2 is a perspective view showing a construction state of the present invention, Figure 3 is a steel bag of the present invention Figure 4 is a cross-sectional view showing a state put down inside of the through (2), Figure 4 is a cross-sectional view showing a state installed by inserting the concrete injection pipe 6 by cutting the upper end of the mesh bag 4 of the present invention, Figure 5 6 is a cross-sectional view showing a state in which the fiber concrete 6a mixed with short fibers or long fibers at an appropriate ratio is injected into the concrete injection pipe 6 installed in the mesh bag 4 of the present invention, and FIG. 6 is a mesh cloth of the present invention. 7 is a cross-sectional view showing a state in which the injection of the fiber concrete 6a mixed with short fibers or long fibers at an appropriate ratio into the inside of the bag 4 is completed, and FIG. 7 is a steel pipe 2 in the vertical hole 1a of the present invention. 8 is a cross-sectional view of the state in which the short fiber concrete pile 7 is completed, and FIG. Sectional drawing of the 1st Example of the state which removed the steel pipe (2) from the straight hole (1a) and constructed it with the long fiber concrete pile 8, FIG. 9 thru | or FIG. 10 is the short fiber or the long fiber concrete pile of which the construction of this invention was completed ( 7) The second shown by installing the foundation 100, the foundation compaction 101, the structure 102, the drainage passage 103, the boundary stone 104, the road (asphalt) 105, which are facilities on top of the (8) To the third embodiment.

The present invention as described above is a cover plate 3 which is opened and closed by self-weight and earth pressure at the lower end of the steel pipe (2) installed by driving to the depth of the vertical hole (1a) to be drilled into the ground of the soft ground (1) ) Was formed in a structure in which the hinge (3a) is attached to be inclined somewhat inclined, the inside of the steel pipe (2), withdraw the mesh bag (4) wound in the form of a roll, the weight into the inside of the mesh bag (4) The body 10 is built up, the ends are bundled together, and inserted into the length depth of the steel pipe 2, and inserted into the depth end of the vertical hole 1a, and protruded longer than the upper end of the steel pipe 2 in the hanged state. After cutting the mesh bag 4 in a state, the concrete inlet pipe 6 is inserted into the end of the mesh bag 4 while the cement concrete 5 is injected, and the single fiber 7a prepared separately. Injection of long fiber 8a as a normal injection equipment (not shown) Cement concrete (5) and short fibers (7a) or long fibers (8a) as a fiber concrete (6a) to be mixed at an appropriate ratio while pulling out the concrete injection pipe (6) to the upper end of the mesh cloth (4) After filling the fiber concrete (6a), the fiber concrete (6a) filled in the inside of the mesh bag (4) by sequentially removing the concrete injection pipe (6) and the steel pipe (2) is a vertical hole (1a) In the filled state in the inside of the vertical hole (1a) inside the condensed (cured) in the short-fiber concrete pile (7) or long fiber concrete pile (8) is embedded, the construction work of the present invention is completed.

In the present invention, the mesh wrapper (4) and the steel pipe (2), the concrete injection pipe (6) and the cement concrete (5) and short fibers (7a) or long fibers (8a) that are wound with a roll is mixed in an appropriate ratio The construction method for installing the construction so as to be vertically embedded in the interior of the soft ground (1) using the fiber concrete (6a) is described in detail with reference to Figs.

First, Figure 3 is inserted into the weight body 10 by tying the lower end of the mesh cloth wrapped around the roll 4 according to the location conditions of the city factory for the reinforcement of the soft ground (1), and then the ordinary steel pipe (2) Using) to drive to the depth of the vertical hole (1a) formed by drilling into the ground of the soft ground (1). At this time, the cover plate 3 placed on the lower end of the steel pipe 2 with the hinge 3a is in a closed state by underground pressure.

Inside the steel tube 2, the cover plate 3, in which the mesh bag 4 in the state where the mesh bag 4 is inserted, becomes a lower end of the steel tube 2 by the weight of the weight body 10. It is installed up to the length depth of the steel pipe 2 so that it may hang down. In such a state, the mesh bag 4 of a position higher than the steel pipe 2 is cut.

In FIG. 4, the concrete injection pipe 6 is inserted to the length depth of the inside of the mesh bag 4 protruding to a position higher than the steel pipe 2.

In FIG. 5, the fiber concrete 6a is filled from the lower end of the mesh bag 4 to be filled up to the upper end of the mesh bag 4, wherein the fiber concrete 6a filling the mesh bag 4 is cement concrete ( 5) and the short fibers 7a are injected as a mixture at an appropriate ratio.

In FIG. 6, the inside of the vertical hole 1a formed in the ground of the soft ground 1 by completely removing the concrete injection pipe 6 from the mesh bag 4 is covered with short fiber concrete piles. (7) is in a state formed by the steel pipe (2).

In FIG. 7, the cement concrete 5 and the short fibers have an appropriate ratio in the interior of the vertical hole 1a by completely removing the steel pipe 2 installed in the vertical hole 1a from the vertical hole 1a. While the fiber concrete 6a in the mixed state is enclosed in the mesh bag 4 and condensed (cured) in a state filled in the vertical hole 1a, it is condensed (cured) by being integrated with the peripheral wall of the vertical hole 1a. By exhibiting the function as the short fiber concrete pile 7, the construction installation of this invention is completed.

FIG. 8 shows that the cement concrete 5 and the long fiber 8a are mixed at a proper ratio with the fiber concrete 6a filling the mesh bag 4 inside the vertical hole 1a to form the inside of the vertical hole 1a. A first embodiment is shown in which a function as the fiber concrete pile 8 is exerted.

As described above, the present invention uses the conventional steel pipe (2) at appropriate intervals according to the location conditions of the factory of the present invention to the lower end of the length depth of the vertical hole (1a) to be installed in the ground of the soft ground (1) It is installed so that the mesh bag 4 hangs down to the length depth which is the inside of the steel pipe 2 in the inlaid state, and then the short fiber 7a or the long fiber 8a is titrated by the concrete injection pipe 6. After the completion of the injection of the fiber concrete (6a) mixed at a ratio, the concrete inlet pipe (6) and the steel pipe (2) is pulled out of the vertical hole (1a), the inside of the vertical hole (1a) is a mesh bag (4) The vertical holes (1a) as short fiber concrete piles (7) and long fiber concrete piles (8) having a structure in which the cement concrete (5) and short fibers (7a) or long fibers (8a) are enclosed and condensed and bonded together. Repeatedly and continuously installed so as to be buried in the network inside the soft ground (1) Bladder-like end to fiber by concrete pile 7 and the sheet construction installed for fiber leakage shock pile (8) in a zigzag pattern to complete the installation construction of the present invention.

At this time, the cement concrete (5) and short fibers (7a) or long fibers (8a) is injected in a suitable ratio in accordance with the appropriate ratio according to the degree of independence and location of the soft ground (1).

9 to 10 show the second to third embodiments shown by installing the structure 102 on top of the short fiber concrete pile (7) or the long fiber concrete pile (8), the construction on the soft ground (1) After the construction of the foundation 100 to the upper part of the short fiber and long fiber concrete piles 7 and 8, the structure 102 of the foundation compaction layer 101, the drainage passage 103, and the boundary stone on the foundation 100. It is shown that 104 and the road (asphalt) 105 were provided.

The upper part of the base 100 is to install a suitable structure for the medium-pressure strength of the short-fiber and long-fiber concrete piles (7) (8) already installed and to install the structures and roads of the dike.

The present invention as described above is easy to inject only the required amount of concrete mixed with cement concrete and short fibers or long fibers into the inside of the vertical hole to be drilled in the ground of the soft ground in a simple operation by the simple operation By filling the short-fiber concrete pile or the long-fiber concrete pile covered in the vertical hole in the vertical hole, the tough tensile force mixed with cement concrete at an appropriate ratio is mixed inside the short-fiber or long-fiber concrete pile covered by the mesh cloth. In the state of condensation (cure) of cement concrete due to the pulling force of the short fibers or the long fibers,

Even when the strength of the soft ground is extremely weak, it can be prevented from being disturbed. The short fiber or long fiber large concrete pile has a great flexibility in flexural capacity and rupture stress, so that the composite ground can be formed in harmony with the soft ground. There is an advantage of reinforcing only the soft parts of the strata, and has the advantage of high economic efficiency compared to the concrete piles by the ready-made products that get support through the repayment of solid internal ground.

Claims (3)

To the lower end of the steel pipe (2) installed by drilling to the depth of the vertical hole (1a) drilled into the ground of the soft ground (1), the cover plate (3) opened and closed by self-weight and earth pressure is slightly hinged (3a) In the conventional one formed by coalescing so as to be inclined to be inclined, Inside the steel pipe (2), the weight body (10) is built into the inside of the mesh cloth (4) in which a roll is wound in the form, bundles the ends, and is inserted into the length depth of the steel pipe (2), and the vertical hole (1a) In the state of being inserted into the end of the end of the line and hanged longer than the upper end of the steel tube (2) cut the mesh bag 4, and then insert the concrete injection pipe (6) to the end of the mesh bag (4) The fiber concrete 6a mixed with cement concrete 5 and short fibers 7a or long fibers 8a at an appropriate ratio. After filling the fiber concrete (6a), the concrete inlet pipe (6) and the steel pipe (2) is sequentially taken out to the inside of the vertical hole (1a), the fiber concrete (6a) is surrounded by the mesh bag (4) Construction to be long-fiber concrete pile (8) including short-fiber concrete pile (7) in the state Mangpo bladder-like composite ground construction method the composition of the fiber reinforced concrete piles for the improvement of soft ground, characterized in that the. In the ordinary thing which drills the vertical hole 1a in the ground of the soft ground 1, The fiber concrete 6a is filled by filling the fiber concrete 6a in which the short fibers 7a are mixed at an appropriate ratio in the inside of the roll-shaped mesh cloth bag 4 installed so as to hang at a depth depth in the vertical hole 1a. ) Is condensed in a structure surrounded by the mesh cloth (4) in the interior of the vertical hole (1a) and formed into a mesh cloth type short fiber concrete pile (7), the composite ground for the improvement of the soft ground characterized by Manoposa type fiber concrete pile of composition. The method of claim 2, The fiber concrete 6a filling the inside of the mesh bag 4 is formed as a mesh cloth type long fiber concrete pile 8 inside the vertical hole 1a by filling and filling the long fibers 8a at an appropriate ratio. Multi-layered composite mesh cloth fiber concrete pile for the improvement of soft ground characterized by combined construction.