KR20100065521A - A shoring method using arch plate pile and h-pile - Google Patents

Abstract

PURPOSE: An earth retaining method using an arch plate pile and an H-pile is provided to improve the stability of retaining construction by enhancing the bending strength of vertical piles and dispersing earth pressure in the axial direction. CONSTITUTION: An earth retaining method using an arch plate pile and an H-pile is as follows. A ground boring machine punches holes along the excavation line of an excavated place. A grouting pipe(41) including a grouting hose and an H-pile(20) with a groove key are inserted into the punched holes at certain intervals. Steel sheet piles(30) are inserted in the punched holes along the groove keys of the H-piles. The H-pile and the steel sheet pile are fixed at the top by using a wall axis direction fixing bolt(50). The punched holes are filled up and compacted and grouting through the grouting hose is carried out. The H-pile and the steel sheet file are supported to a retaining wall body.

Description

A shoring method using arch plate pile and H-pile

1 is a perspective view showing the installation of the earthen wall using a combination of the H-Pile and steel plate piles to perform continuous ground drilling according to an embodiment of the present invention,

Figure 2 is a plan view showing the installation of a retaining wall using a combination of the H-Pile and steel plate piles to perform a continuous ground drilling according to an embodiment of the present invention,

3, 4, 5, 6, 7 is a flow chart showing the construction of the earthquake wall method using a combination of H-Pile and steel plate piles by performing continuous ground drilling using the heavy drilling equipment according to an embodiment of the present invention ,

8 is a perspective view showing a steel sheet pile according to an embodiment of the present invention,

Figure 9 is a perspective view showing that the H-Pile grouting pipe and the home key is coupled according to an embodiment of the present invention,

10 is a perspective view illustrating that the grouting pipe and the home key are disassembled in the H-Pile according to an embodiment of the present invention.

11 is a flow chart for explaining the construction method of the retaining wall according to an embodiment of the present invention.

Description of the Related Art

10: base 41: grouting tube

11: drilling hole 42: grouting hose

20: H-Pile 43: grouting nozzle

21: "B" section 44: grouting hose fixing bolt

22: home key 45: grouting hose fixing nut hole

30: steel plate pile 50: wall axial fixing bolt

31: Steel plate pile blade 51: Wall axial fixing nut hole

40: grouting area 100: ground drilling equipment

The present invention relates to a soil wall construction method using a combination of H-Pile and steel plate piles, which performs continuous ground drilling, and more particularly, to carry out continuous drilling by using heavy equipment along the excavation line, and grouting pipe and home key. Insert the H-Pile equipped with. Insert the steel plate using the grooves and grooves between the H-Pile and fix the H-Pile and the steel plate. The groove is connected from the bottom of the H-Pile to the top. After filling and compacting the perforated ground and injecting a chemical solution such as cement milk through the pre-installed grouting hose to reinforce perturbed ground perforated by perforation, and further tightly intersect H-Pile and the steel plate pile to block the inflow of groundwater. Therefore, the purpose is to prevent ground subsidence of the back ground and to improve the stability by the effect of suppressing the horizontal displacement of the earth wall.

By repeating the above steps to perform the step-by-step in the pre-formed retaining wall and the installation of underground steel after the installation of the underground structure is easy and can be recycled relates to a high stability and economical retaining wall construction method.

In general, the earthen construction method is a kind of temporary structure for installing underground structures, and it is widely used in building construction and civil construction.

H-Pile + earth plate method is used as a conventional soil film method. This method is a method that makes earth wall by inserting earth plate between H-Pile while entering and digging down the H-Pile at regular intervals. It has the advantage that it can be applied to all soils, but it blocks the inflow of groundwater to a separate drilling surface. There is no order, the wall flexural rigidity is weak, and the horizontal displacement is large due to poor backfilling. In particular, there is a disadvantage that the ground subsidence is large.

To overcome this problem, C.I.P (Cast In Place Pile) method was developed. This method is a method of forming earth walls continuously by drilling steel bars and H-Piles and pouring concrete after drilling using drilling equipment on the outer surface of the ground to be dig. As a result, when the groundwater is large or the depth of rooting is deep, the quality variation is large due to material separation and the process is complicated.

In particular, after the completion of the construction, the reinforcement and concrete could not be recycled, and in the case of H-Pile, there was a problem in that the drawing was not easy.

In addition, due to large-scale civil engineering works in neighboring countries, supply and demand for raw materials was not easy, resulting in increased construction costs due to delays in air and material costs.

Therefore, the present invention has been made to solve the above problems,

Continuous drilling is carried out by drilling equipment along the excavation line and the H-Pile equipped with grouting pipe and home key is inserted. Insert the steel plate using the grooves and grooves between the H-Pile and fix the H-Pile and the steel plate. The groove is connected from the bottom of the H-Pile to the top. After filling and compacting the perforated ground and injecting a chemical solution such as cement milk through the pre-installed grouting hose to reinforce perturbed ground perforated by perforation, and further tightly intersect H-Pile and the steel plate pile to block the inflow of groundwater. Therefore, the purpose is to prevent ground subsidence of the back ground and to improve the stability by the effect of suppressing the horizontal displacement of the earth wall. By repeating the above process to perform the step-by-step in the pre-formed state of the earthquake wall, and after the installation of the underground structure is completed, the drawing of the used steel can be easily and recycled to provide a high stability and economical earthquake wall construction method.

In addition, the horizontal displacement is generated toward the excavation surface due to the earth pressure generated during the excavation, and means for supporting it, that is, the Earth Anchor method, the Soil-nail method, the support method, etc.

Therefore, if the flexural rigidity of the earth wall is increased, the support interval of the support beam can be increased, so that the quality of the structure is improved and the construction cost is reduced because the steel structure is not interfered with when installing the underground structure. Therefore, in order to increase the stability of the soil barrier, the force to resist deformation to the vertical pile (wall) must be improved, that is, the flexural rigidity (EI, E: cross-sectional moment, I: elastic modulus). Therefore, the object of the present invention is to provide a retaining wall construction method which improves the bending rigidity of the vertical pile and distributes the axial direction against the simultaneous earth pressure further improving the stability of the retaining layer.

The present invention has the following features to achieve the object as described above.

The present invention relates to a retaining wall construction method using a combination of H-Pile (20) and steel plate pile (30) to perform continuous ground drilling during the construction of the earth block for installing the underground structure.

Thus, the earthquake wall installation method of the present invention is a continuous wall drilling step using the ground drilling heavy equipment 100 having a predetermined cross-sectional area along the excavation line; Grouting pipe 41 including the grouting hose 42 and the H-Pile (20) insertion step is provided with a home key (22); Inserting the steel plate pile 30 along the home key 22 and the home key 22 between the H-Pile 20; Fixing step of the H-Pile 20 and the steel plate pile 30 by using the mounting bolts; Filling and compacting the perforated ground; Reinforce the ground perturbed by perforation, make the space between H-Pile 20 and steel plate pile 30 more tight, and block groundwater inflow to prevent ground subsidence of ground ground through mounting grouting pipe 41. Grout material injection step; Digging from the excavation surface; After the completion of the target structure using a vibro hammer, etc. H-Pile (20), steel sheet pile 30 steel drawing step; characterized in that it is performed including.

Here, the "c" shaped steel 21 constituting the groove key 22 is fixed with the H-Pile 20 to further increase the flexural rigidity, to prevent the separation when the steel sheet pile 30 is inserted, and fixed by welding or bolting Let's do it.

The steel plate pile 30 sandwiched between the H-Pile 20 is a metal material having a predetermined cross-sectional area.

In addition, the continuous drilling operation is carried out according to the excavation line, and insert the H-Pile (20) and the steel plate (30) from the drilling position, restrained from each other, the drilling section for the reinforcement of the ground disturbed by the drilling and the order effect during underground excavation In the installation of continuous wall of soil through compaction and ground grouting,

The H-Pile 20 has a groove key 22 connected with grooves from the top to the bottom so that the grouting pipe 41 and the steel plate pile 30 fit well to reinforce the ground disturbed by the perforation. 30) is characterized by an arch shape having a certain curvature to improve the bending rigidity and shear strength of the member and to improve the flexural rigidity of the retaining wall by axially distributing the earth pressure in the axial direction.

The present invention having such characteristics can be more clearly described by the preferred embodiments thereof.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed in a common or dictionary sense, and the inventors will have to incorporate the concepts of terms in order to best explain their invention in the best possible way. It should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a perspective view showing the installation of the earth wall using a combination of the H-Pile 20 and the steel sheet pile 30 to perform a continuous ground drilling according to an embodiment of the present invention, Figure 2 is an embodiment of the present invention Continuous ground drilling according to the example is a plan view showing the installation of the earth wall using the combined H-Pile 20 and steel plate pile 30, Figures 3, 4, 5, 6, 7 is one embodiment of the present invention Continuous ground drilling using the drilling machine 100 according to the example and the construction flow chart showing the construction of the soil wall method combining the combined H-Pile 20 and steel plate pile 30, Figure 8 is a view of the present invention 9 is a perspective view illustrating a steel plate pile 30 according to an embodiment of the present invention, and FIG. 9 is a grouting pipe 41 and a home key 22 in which the H-Pile 20 includes a grouting hose 42 according to an embodiment of the present invention. ) Is a perspective view showing that is coupled, Figure 10 is the H-Pile (20) grouting pipe 41 and the groove according to an embodiment of the present invention Fig. 11 is a perspective view showing that the key 22 is disassembled, and Fig. 11 is a flowchart for explaining the construction of the retaining wall according to the embodiment of the present invention.

As shown, the earth wall construction method of the present invention is continuous by a predetermined interval starting from any one column of the drilling hole 11 using the ground drilling equipment 100 having a predetermined cross-sectional area along the excavation line of the base 10 Ground drilling is performed to form a punching hole (11).

Here, the continuous wall drilling step using the drilling equipment 100, can be perforated in the ground by a method commonly used in this field, so a detailed description thereof will be omitted.

As described above, the continuous wall drilling step is a means for inserting the H-Pile 20 and the steel plate pile 30 into the ground and reinforcing the perforated ground through grouting, and the ground drilling sequence may be variously performed. For example, the punching can be performed in order from one side, and the H-Pile 20 can be inserted by punching both sides of the H-Pile 20 to be inserted first, and then drilling the middle.

In addition, the ground drilling equipment 100 forms a drill hole 11 having any one of an auger drill, a hammer drill, a three-axis auger.

As described above, through the perforation in the ground to form a punching hole 11 and inserts the H-Pile (20) on both sides. At this time, the insertion step of the H-Pile (20), the insertion order of the H-Pile (20) can be inserted in a state in which the successive holes 11 are formed continuously, both sides first to form a punching hole (11) After inserting the H-Pile 20 can be continuously drilled between the H-Pile (20).

Here, the configuration of the H-Pile 20 is fixed to the H-Pile (20) Web by bolt or welding to form the groove key 22 to fit the steel plate pile 30 is well do.

The configuration of the "c" shape steel 21 is a wall axial fixing device (wall axial fixing bolt 50, wall axial fixing to prevent the axial movement of the H-Pile 20 and steel plate pile 30) Nut 51).

In addition, the grouting pipe 41 for reinforcing the ground disturbed by drilling is fixed to the inner side of the "c" section steel, the grouting pipe 41 is a plurality of devices for fitting the grouting hose 42.

The bottom end of the grouting pipe 41 is composed of a nut and bolt tapping to fix the grouting hose 42, that is, a grouting hose fixing bolt 44 and a grouting hose fixing note 45.

As described above, after the H-Pile 20 is inserted into the drilling hole 11, the steel sheet pile 30 and the steel sheet pile blade 31 between the H-Pile 20 are formed in the H-Pile 20. The steel plate pile 30 is inserted along the 22 and the groove keys 22.

At this time, the inserting the steel plate pile 30 along the groove key 22 and the groove key 22 between the H-Pile 20, the steel sheet pile 30 is a metal plate having a certain cross-sectional area and has a bending rigidity It consists of.

Here, if the bending rigidity of the earth wall body is increased, the soil film stability is improved, so that the shape of the steel plate pile 30 is deformed to improve the bending rigidity, and is formed in an arc shape having a certain curvature so as to disperse the earth pressure.

At this time, between the H-Pile (20) is installed before the installation of the inner support beam of the excavation surface side when the trench in the form of the arch-shaped steel plate 30 is installed in the band before welding the band and the H-Pile (20) structure shape is tide The arched (tied arch) will have a more stable structure.

In addition, the shape deformation for increasing the flexural rigidity of the earth wall body can also bend both sides of the metal plate 90 degrees to increase the bending resistance.

At this time, by bending and bending to form a certain curvature of the steel plate pile 30 and steel plate pile 30, steel plate pile wings 31, when the depth of excavation is deep, the steel plate pile 30 is welded vertically and the joint portion of the steel pad Reinforced by a machine to form a unitary.

Here, the steel plate pile 30, the steel plate blade 31 is engaged with the groove key 22 of the H-Pile (20) to prevent the inflow of groundwater.

In addition, when the steel sheet pile 30 does not enter well from the drilling hole 11, water is introduced into the drilling hole 11 to soften the perforated ground and vibrate at the upper portion of the steel sheet pile 30.

As described above, the steel plate pile 30 is inserted between the H-Pile 20 and then the H-Pile 20 and the steel plate pile 30 are fixed by using the wall axial fixing device mounted thereon.

At this time, the fixing step of the H-Pile (20) and the steel plate pile (30) by using the axial fixing device that is already mounted, the wall axial fixing nut (51) to form a screw step at the upper end of the "c" section steel And a wall axial bolt 50 fitted thereto.

Here, the bottom of the H-Pile 20 is fixed to the ground from the drilling hole 11 when the H-Pile 20 and the steel plate pile 30 are continuously installed, but the upper part may be slightly inclined due to the clearance. In order to restrain this, the H-Pile 20 and the steel plate blade 31 are pressed by turning the wall axial bolt 50.

As described above, after fixing the H-Pile 20 and the steel sheet pile 30, the soil disposed of by drilling is filled again in the drilling hole 11 and compacted.

At this time, the ground filling and compacting step, the soil disposed from the perforated again to refill the perforation hole 11 and to perform the compaction or vibration compacting to prevent the back ground subsidence caused by the ground subsidence.

As described above, grouting is carried out through the grouting hose 42 after the mining of the perforated ground.

Here, the grout material injection step is to inject a solution such as cement milk or bentonite to reinforce the ground disturbed by perforation.

In addition, it is to prevent the ground subsidence of the back ground by blocking the inflow of groundwater to the excavation surface side when the trench is further sealed between the H-Pile (20) and the steel plate blade (31).

At this time, the grouting hose 42 is inserted into the grouting pipe 41 and the grouting hose 42 having a screw step is formed in the grouting pipe 41 installed at the bottom end thereof to grout the grouting hose 42 end by turning a bolt. It is pressed against the tube 41 and fixed.

Here, the grouting pipe 41 is welded and fixed in the axial direction in the "c" section steel 21 in a plurality of steel pipe form so that the grouting hose 42 is fitted and is a metal material.

In addition, the grouting hose 42 has a good rubber material and forms a grouting injection hole 43 through a plurality of holes in the middle.

At this time, the grouting method is a method commonly used in this field, and a detailed description thereof will be omitted. Grouting is injected through the grouting hose 42, and the injection pressure is adjusted according to the type of soil.

In addition, when the grouting is completed, the ground disturbed by the perforations is reinforced to form the grouting region 40.

As above, the grout is carried out stepwise from the excavation surface after injection.

Here, the excavation step from the excavation surface, the excavation using the wall formed of the H-Pile 20 and the steel plate pile 30, the grouting reinforcement and the groove key 22 of the H-Pile (20) Engagement with the steel plate blade 31 prevents the inflow of groundwater, and the wall flexural rigidity is increased, so that the support space can be widened.

As described above, after the trench is completed and the underground construction is completed, the H-Pile 20 and the steel plate pile 30 are drawn out using a vibro hammer.

As described above, in the present invention, the continuous soil wall is formed in advance along the excavation line, and there is no need for a separate order method, and the earthquake wall flexural stiffness is increased and the earth pressure is dispersed during excavation to support the soil wall, the middle pile As it is possible to reduce such steels, there is little effect of steel interference when building construction structures, the construction speed is fast, and the quality of structures is improved by reducing the construction joints.

In addition, since the H-Pile and steel plate pile are not buried in concrete after completion of the target structure, it is easy to recover by drawing and can be used permanently.

In addition, since the H-Pile forms a near entrance, the steel plate pile can be inserted only to the excavation surface, thereby reducing the drilling cost, reducing the steel materials, and increasing the construction speed.

In addition, as the shape of the tunnel (circular, egg-shaped) itself serves as a support beam, the arch structure has the effect of improving the earth film stability by dispersing the earth pressure in the axial direction.

Claims (2)

In the earthquake wall method using the H-Pile (20) and the steel plate pile (30) combined to perform continuous ground drilling during the earthquake construction, Continuous wall drilling step using the ground drilling equipment 100 having a predetermined cross-sectional area along the excavation line of the excavation site; The grouting pipe 41 including the grouting hose 42 and the H-Pile 20 provided with the groove key 22 in the axial direction are inserted into the drilling hole 11 at predetermined intervals, and the H-Pile 20 Inserting the steel sheet pile 30 into the continuous drilling hole 11 along the groove key 22 and the groove key 22 therebetween; Fixing the H-Pile (20) and the steel plate (30) by using the wall axial fixing bolt (50) from the top, grouting injection step through the grouting hose 42 after filling and compacting the hole (11); Digging wall using the H-Pile 20 and the steel plate (30), characterized in that carried out; the excavation step of supporting and excavating the H-Pile (20) and the steel plate (30) to the earth wall. Method. According to claim 1, The steel plate pile (30) is a metal plate material having a bending cross-section having a predetermined cross-sectional area, it is composed of a single piece, the soil wall construction method characterized in that the arch shape having a certain curvature to improve the bending rigidity, and to disperse the earth pressure.

Images