KR101913478B1 - Plain Concrete Compaction Apparatus for Method of Ground Hardening Using Vibration Compaction and Concrete Column and Method Thereof - Google Patents

Abstract

The present invention relates to a compact concrete compacting system applied to a ground improvement method using vibratory compaction and a concrete column. The present invention relates to a non-perforated concrete compaction system suitable for a ground improvement method using vibratory compaction and a concrete column, comprising: a perforation excavation unit for forming excavation holes to a specific depth in the ground; A casing penetrating the drill hole; A concrete injection unit for generating a concrete reformer to be introduced into the casing; And a traction unit for moving the concrete injection unit and the casing to the upper side, wherein the perforation drilling unit forms the drilling hole with a certain depth, and when the casing is penetrated into the drilling hole, Characterized in that the concrete injection unit is penetrated into the casing and the casing and the concrete injection unit are moved to the upper side by the pulling unit and the concrete is filled from the lower part of the excavation hole, The present invention relates to a concrete compacting system suitable for a method of improving a ground using a concrete column.

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a concrete compacting apparatus for compacting concrete,

The present invention relates to a compact concrete compacting apparatus applied to a ground improvement method using vibratory compaction and a concrete column. More specifically, by combining the conventional vibration compacting method and the concrete column method, it is possible to reduce the intergranular clearance between the soil around the excavation hole in which the ground improvement process is performed, improve the cohesion of the soil itself, The present invention relates to an apparatus for compacting concrete, which is applied to a method for improving ground using a vibration column and a concrete column in which an unfilled concrete column is formed in a drilling hole by fusing a compacting method to minimize an additional subsidence phenomenon.

Vibro Flotation (or Vibro Compaction) method or Vibro Replacement (or Stone Column) method is applied to improve general soft ground.

Vibro flotation method, also called "vibration compaction" method, is a large-sized rod-shaped vibrator (diameter of about 20 cm, length of 5 ~ 9m) called vibro flotation, Introduce, sand the surrounding sand, add gravel and other fillers, and then remove it.

The Vibro Replacement method, also called Stone Column method, was developed based on the Vibro Flotation method. Vibrator self weight and high pressure water jet are used to penetrate design and construction depth. By controlling the displacement and pressure of the water jet at the time of intrusion, the ground around the vibration vibrator is rinsed out of the excavation hole with water. When a certain crushed stone is injected into the ground, the rock column is formed by vibrating when it reaches the lower end of the vibrator, and this process is continuously repeated to the surface layer.

The Vibro Flotation method aims to reduce the intergranular porosity in non - cohesive soils, ie sandy soils, and to increase the relative density of the soil by regrowth. On the other hand, the Stone Column method has the general difference that it is used in cohesive soils.

These methods are disadvantageous in that the settling amount is increased in accordance with the compaction state progressed during the process. In both methods, the materials injected into the excavator are not of a type with strong cohesive force, but by rearranging the particles, the basic principle is the same, and there is no binding force between the particles. Therefore, if exposed continuously to anthropogenic natural vibration after construction, it may cause additional subsidence, collapse to the side without maintaining the vertical column shape, or it may form pores in some areas of the earth depending on the situation. Therefore, it is necessary to develop a new soil improvement method that does not cause additional settlement after construction.

FIG. 1C shows a side view of the construction sequence of a general concrete column method. Concrete columns can be pulled into a drilled hole or cast into a drilled hole.

1A through 1C, by combining the conventional vibration damping method with the concrete column method, it is possible to improve the cohesion of the soil itself by reducing the intergranular clearance between the soil around the excavation hole where the soil improvement process is performed, It is expected that a new ground improvement method can be proposed which can minimize additional settlement after construction by forming an unfilled concrete column on a drilled hole by fusing a casting method and a vibration compacting method.

Korean Patent No. 1156577 Korean Patent No. 0816382

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a slab structure in which a plurality of slip- It is not only easy to use, but also it is not necessary to connect with slab because it is a soil improvement agent which has better fusion characteristics with the ground than the Stone Column method. Accordingly, it is possible to reduce the horizontal force transmitted to the structure installed on the ground, thereby reducing damage when an earthquake occurs, and to provide vibrationless compaction and concrete compacting method applied to the method of improving ground using concrete pillars It has its purpose.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A first object of the present invention is to provide a non-perforated concrete compacting apparatus suitable for a ground improvement method using vibratory compaction and a concrete column, comprising: a perforation excavation unit for forming excavation holes to a specific depth in the ground; A casing penetrating the drill hole; A concrete injection unit for generating a concrete reformer to be introduced into the casing; And a traction unit for moving the concrete injection unit and the casing to the upper side, wherein the perforation drilling unit forms the drilling hole with a certain depth, and when the casing is penetrated into the drilling hole, Characterized in that the concrete injection unit is penetrated into the casing and the casing and the concrete injection unit are moved to the upper side by the pulling unit and the concrete is filled from the lower part of the excavation hole, It can be achieved by providing an unfolded concrete compaction apparatus suitable for the method of improving the ground using the concrete column.

The casing may be penetrated into the excavation hole by a pneumatic method.

The apparatus may further include an excitation unit for applying vibration to the casing, wherein the casing is intruded into the excavation hole by vibration of the excitation unit.

The vibrating unit may further include a vibrating body attached to the casing to vibrate the casing.

Alternatively, the contrast injection unit may further include a vibrator so that it can be vibrated by itself.

The control unit may further include a control unit for controlling at least one of the excavating unit, the tow unit, and the drilling excavation unit, wherein the control unit controls the excavating unit, the tow unit, And control the driving of at least one of the excavation means.

Alternatively, the traction unit may further include a traction length sensing device for sensing a traction movement length of the casing and the concrete injection unit, and the control unit may further include a display unit for informing the operator of the traction movement length .

A second object of the present invention is to provide a method of drilling a drilling rig, wherein the drilling rig unit drills and excavates the ground to a predetermined depth to generate a drill hole and simultaneously penetrates the casing with the drill hole; Connecting a vibrating means for applying vibration to the casing and the casing; Penetrating a concrete injection unit into the casing; Vibrating the casing by the vibrating means; And filling the unfilled concrete from the bottom of the excavation hole through the concrete injection unit while the vibration of the casing is maintained to produce an inactive concrete modifier. The method of claim 1, Can be achieved by providing a compaction method.

The concrete injection unit may include a vibrator, and the concrete injection unit may be self-vibrating.

The control unit may further include controlling at least one of the exciting means, the traction unit, and the drilling excavation unit.

The method may further include detecting a traction length of the traction length sensing device included in the traction unit, wherein the controller informs the operator of the traction length through the display unit.

The control unit may further include a step of receiving a traction speed control amount of the traction unit from the operator through an input unit.

According to one embodiment of the present invention, since there is no fear of settlement of a ground in which a plurality of plain concrete is installed, it is easy to arrange the slab structure on the ground, and the non-slip concrete has characteristics of fusion with the ground Since it is an excellent soil improvement agent, it does not need to be connected to the slab. Therefore, the horizontal force transmitted to the structure installed on the upper part of the ground is reduced, so that the damage can be reduced when an earthquake occurs, and the construction cost can be reduced.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

1a. A side view of the construction sequence of a typical Vibro Flotation (Vibro Compaction) method.
1b. Construction side view of general Vibro Replacement (Stone Column) construction method.
1C. A side view of the construction sequence of a general concrete column method - field installation method.
2 is a flow chart of a construction method using a vibrationless compaction system according to an embodiment of the present invention and a concrete compacting system suitable for a method of improving the ground using a concrete column
3 is a perspective view of a casing applied to a vibrationless compaction system according to an embodiment of the present invention, which is suitable for a ground improvement method using a concrete column.
Figure 4 is a side view of a construction procedure using a vibrationless compaction system and an unfilled concrete compaction system suitable for a ground improvement method using a concrete column according to an embodiment of the present invention.
5 is a sectional view of the ground subjected to the ground improvement method using the vibrationless compaction and the concrete pillar according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is connected to another part, it includes not only a case where it is directly connected but also a case where the other part is indirectly connected with another part in between. In addition, the inclusion of an element does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Hereinafter, the structure and function of a vibrationless compaction apparatus and a concrete compacting apparatus applied to a method of improving a ground using a concrete column will be described.

FIG. 2 is a flow chart of a method of modifying a soft ground using a vibrationless compaction apparatus and a concrete pillar according to an embodiment of the present invention.

Referring to FIG. 2, it can be seen that the method of modifying the soft fat using the non-conforming concrete compaction system according to the present invention is a new method of improving the ground using a combination of a general cast-in-place pile construction method and a vibro replacement (stone column) .

A casing inserting process S2 for inserting a casing into the excavation hole, a concrete injecting unit installing process S3 and a concrete injection process S4 are performed by drilling a drilling hole with a perforated drilling unit on the ground, . The function and overall flow of the unit process of the method is similar to that of the Vibro replacement method. However, it is a clear difference that the landfill that is injected into the excavation hole in the concrete injection process (S4) is concrete. Therefore, it can be said that it is the fusion of the vibration method and the cast-in-place pile method.

As described above, the general Stone Column method forms a digging hole and intrudes and compaction of the crushed stone or rough granule of the crushed aggregate or coarse granule in the inside to form a crushed stone column in the ground . In the construction step, the crushed stones are injected into the bottom of the excavation hole, and the crushed stones are injected in the lateral direction of the excavation hole using a vibrator. In other words, it is a method to improve the effective stiffness of the whole ground by covering the soil between surrounding crushed rocks.

In principle, it is similar to Vibro Flotation (Compaction) method, but there are some differences in the applied ground properties. Stone column method is applied to the ground where Vibro Flotation method is not applicable. In other words, the response to vibration consolidation is applied to the ground where the particles forming the soil are not relocated in the vibration process of the small ground and the vibrator. Typical soil types include pure silty / clay or mixed sediments such as sand clay and soils.

However, the stone column method can cause severe settlement behavior after construction. In order to solve such a problem, in the present invention, as shown in FIG. 2, a method of filling an unfilled concrete is applied instead of a crushed stone to be filled in a drilling hole in the Stone Column method.

In the Stone Column method, the charged crushed stones can be repositioned by vibrations, but if they are exposed to continuous artificial / natural vibrations after construction, continuous soil particle relocation can not but proceed. As described above, due to the characteristics of the ground to which the Stone Column method is applied, the soil forming the ground layer penetrates to the center of the filled stone column, and the gap between the respective stone particles can not be filled.

On the other hand, the application of the basic construction method of the Stone Column method is applied, but if the filling material is changed from the existing crush stone to the unfilled concrete, the settlement behavior is expected to be remarkably reduced due to the rigidity of the concrete after the concrete curing.

In general concrete casting method, various sizes and kinds of aggregates are mixed with sand and cement. Generally used aggregates have gravels, and their stiffness is improved by strongly bonding sand and cement between the rigid aggregates.

As described above, the Stone Column method buries crushed stones in the soil that forms the original ground layer by strongly pressing the rigid crushed stone together with the vibration in the excavation hole. Due to the nature of the ground layer to which the Stone Column method is applied, The effect is markedly reduced and the viscous soil fills the gap between the crushed stone, which can be contrasted with the function of aggregate such as gravel in concrete, and soils that fill the crushed stone, such as sand and cement.

Therefore, if stone column is replaced with plain concrete in the basic construction method of the stone column method, not only the original effect to obtain the stone column method can be obtained, but also the settlement phenomenon, which is an inherent problem of the stone column method, It is expected to improve.

In addition, when the vibration is applied in the process of filling the inside of the excavation hole while increasing the strength by increasing the aggregate ratio of the non-concrete concrete, rearrangement phenomenon depending on the particle size may also occur in the inside of the non- Since the site where the concrete piling is applied is a drill that is difficult to work directly by the shoemaker, when the ratio of the gravel or other aggregate is high according to the viscosity of the concrete, the sand may be difficult to fill the gap between the aggregates. Therefore, it is possible to improve the soft ground without the settlement behavior by filling the concrete with high rigidity while the vibration is applied.

In other words, since the Vibro Flotation method can not be applied to the ground improvement method using the vibrationless compaction and concrete column, which is applied to the ground improvement method according to the embodiment of the present invention, As a method for applying, it is possible to improve settlement after application by applying rigid concrete.

In addition, when filling the non-wet concrete, the weight of the concrete injection unit injecting the non-wet concrete fuses with the vibration of the vibrating means, and the aggregate contained in the non-wet concrete is fused with the soil constituting the existing ground at the interface between the excavated and non- Compared with the Stone Column method, it can be more effective in improving the bearing capacity of the ground.

3. FIG. 3 is a perspective view of a casing applied to an unfolded concrete compaction apparatus according to an embodiment of the present invention, which is suitable for a vibratory compaction and a ground improvement method using a concrete column.

Referring to FIG. 3, the casing 100 may be connected to the excitation unit 110 outside the excavator to be vibrated in the excavation hole, and the vibrator 120 may be provided in the casing itself. The vibrating body is equipped with a wired / wireless communication device and can be controlled by an operator. The casing can be intruded into the excavator when it is intruded into the excavator, or it can be intruded by vibrating, and both of these methods can be used to make the casing easier.

 FIG. 4 is a side view of a construction procedure using a vibrationless compaction apparatus according to an embodiment of the present invention, and a concrete compacting apparatus suitable for a ground improvement method using a concrete column.

Referring to FIG. 4, if the auger a punctures the ground to form a digging hole, the casing is inserted (FIG. 4A). When the auger and the lower end of the casing reach a specified designed depth, the auger is moved from the excavator to the ground (Fig. 4B). The concrete injection unit 200 is inserted into the casing so as to contact the casing (Fig. 4C), and the excitation unit 110 or the vibrating body 120 vibrates to apply vibration to the excavation hole wall surface (Fig. The casing and the concrete injection unit are filled with the non-concrete concrete at the bottom of the concrete injection unit while being moved to the upper part using the mid-stage (Figs. 4E to 4F). It is possible to improve the vibration compaction effect by vibrating itself by providing a vibrator in the concrete injection unit.

As shown in Figs. 4E to 4F, as the casing is vibrated, vibration is applied to the ground via the excavating hole wall surface, and the vibrator provided in the concrete injection unit is vibrated so that the aggregates contained in the in- .

At the lower end of the casing and concrete injection unit, the vibration is interrupted and at the same time, the unfilled concrete is injected, thereby maintaining the state of the excavated wall wall, the adjacent ground soil, and the impervious concrete to be injected. It starts.

As described above, the characteristics of the ground in which the Stone Column method is applied are not easy to relocate soil particles due to vibration. In other words, the vibro flotation method is not suitable because the particle pore size of the soil is small and it maintains a kind of viscosity such as clay. In this soil condition, stone column method is used to increase the rigidity of soft ground by injecting stone with high stiffness. Since the stiffness between the stone and stone is not high, collapse of crushed stone itself can be considered.

4E to 4F, the casing applies vibration to the wall surface of the excavation hole, and the concrete to be filled receives pressure due to the self weight of the concrete injection unit, and at the same time, And the vibration by the casing is also applied. Therefore, pores between various aggregate materials contained in concrete are easily filled with sand and cement, and fusion phenomenon of existing ground and concrete may occur at the interface between concrete and excavation wall wall.

In addition, the vibration of the water and the casing contained in the concrete may be temporarily and stagnantly liquefied by a certain depth from the excavated wall surface to the horizontal direction. In this state, a portion of each of the aggregates in the concrete subjected to the pressure and vibration from the concrete injection unit is pierced into the wall of the excavation hole, which is formed as if numerous uneven shear-key structures are formed at the interface between the concrete column and the excavating- . As a result, the bonding strength between the free-flowing concrete and the existing ground can be increased. If the self-rigidity of the free-flowing concrete is increased, the ground improvement performance can be expected more effectively than the stone column method,

 The apparatus for compaction of an unfenced concrete according to the present invention may further comprise a vibrating unit including a vibrating body and a control unit for controlling the concrete injection unit. A more effective construction can be expected by controlling the vibration characteristics including the period and the size of the vibration generated in the unit and the injection speed of the concrete injected in the concrete injection unit according to the characteristics of the ground to be installed. Also, since the change of the ground properties can be different also in the vertical direction of the ground, the vibration characteristics and the concrete injection conditions can be vertically differentiated. To this end, the traction unit for towing the casing and the concrete injection unit may further include a device for sensing the traction length.

FIG. 5 is a cross-sectional view of a ground subjected to a ground improvement method using a vibrationless compaction and a concrete pillar according to an embodiment of the present invention.

As can be seen from FIG. 5, the slab structure of the ground can be easily arranged because there is no fear of settlement of the ground in which a plurality of slabs are installed, and the slab structure of the slabs is better than the stone column Since it is a reformer, it does not need to be connected to the slab. Therefore, when the earthquake occurs, the horizontal force transmitted to the structure installed at the upper part of the ground decreases, so that the damage of the structure constructed at the upper part of the ground can be reduced and the construction cost can be reduced.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

S1. Drilling process
S2. Casing insertion process
S3. Concrete injection unit installation process
S4. Concrete injection process
a. Auger
100. The casing
110. The unit
120. Vibrating body
200. Concrete injection unit.

Claims (12)

The present invention relates to a concrete compacting apparatus suitable for a ground improvement method using vibratory compaction and a concrete column,
A perforated drilling unit forming a drilling hole to a specific depth on the ground;
A casing penetrating the drill hole;
A concrete injection unit for generating a concrete reformer to be introduced into the casing to contact the casing; And
A towing unit for moving the concrete injection unit and the casing to the upper side;
A vibrating unit for vibrating the casing penetrated into the excavating hole; And
And a vibrator capable of vibrating the concrete injection unit,
Wherein the drilling rig unit forms the drill hole to a specific depth and when the casing is penetrated into the drill hole, the drill rig unit is grounded, and the concrete injection unit is inserted into the casing,
The concrete is injected into the lower portion of the excavation hole while the casing is excited by the excavating unit and the wall surface of the excavation hole is vibrated so that the concrete in the concrete injection unit is injected into the lower portion of the excavation hole, The aggregate of the wet concrete is mixed with the wall surface of the excavation hole,
Wherein the casing and the concrete injection unit are moved to the upper side by the pulling unit to fill the unfilled concrete from the lower part of the excavation hole, wherein the concrete and the concrete are filled with the vibration and the concrete column. The method according to claim 1,
Wherein the casing is penetrated into the excavation hole by a pneumatic method, and is suitable for the method of improving the ground using vibration poles and concrete columns. delete delete delete The method according to claim 1,
Further comprising a control unit for controlling at least one of the excavating unit, the tow unit, and the drilling excavation unit,
Wherein the control unit controls driving of at least one of the excavating unit, the tow unit, and the drilling excavation unit on the basis of a vertical moving state of the casing. The vibrating compaction and the concrete non- Compaction device. The method according to claim 6,
The tow unit further includes a tow length sensing device for sensing a traction length of the casing and the concrete injection unit,
Wherein the controller further comprises a display unit for informing the operator of the traction movement length. The compacting apparatus of claim 1, wherein the vibration suppression unit comprises: Drilling and drilling the ground to a predetermined depth to produce a drilling hole, and simultaneously penetrating the casing with the drilling hole;
Connecting the casing and a vibrating unit for applying vibrations to the casing;
Penetrating a concrete injection unit into the casing;
Vibrating the casing by the vibrating unit; And
The vibration of the casing is retained and the casing and the concrete injection unit are moved to the upper side by the traction unit and the unfilled concrete is filled from below the excavation hole through the concrete injection unit to generate the non- ≪ / RTI &
Further comprising a vibrator installed in the concrete injection unit to cause the concrete injection unit to vibrate by itself. The method of claim 1, wherein the vibrating compaction unit includes a vibrator. delete 9. The method of claim 8,
And controlling the driving of at least one of the excavating unit, the traction unit, and the concrete injection unit by a control unit. The method of claim 1, wherein the excavating unit comprises a vibrating compaction unit and a concrete pillar. 11. The method of claim 10,
Further comprising the step of sensing a traction length of the traction length sensing device included in the traction unit,
Wherein the control unit further includes a step of informing the operator of the traction length through a display unit. The method of claim 1, wherein the method is a vibration compensating method using vibration poles and a concrete column, and a method of improving a ground using a concrete column. 12. The method of claim 11,
Wherein the control unit further receives a traction rate control amount of the traction unit from the operator through the input unit. The method of claim 1,

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