KR20120088627A - Temporary pile using bending restoring force and temporary structure construction method therewith - Google Patents

Abstract

PURPOSE: A temporary pile using bending restoring force and a construction method of a temporary structure using the same are provided to cost-efficiently construct a temporary structure by minimizing the installation interval of struts. CONSTITUTION: A temporary pile using bending restoring force comprises pipe-shaped casing piles(200) and bending piles(100). The casing piles are separated downward from each other and are linearly installed on the ground. When the bending piles are bent so that a bending restoring load(P2) can be applied in the opposite direction to earth pressure(P1), the bent bending piles are inserted into the casing piles and are unbent.

Description

TEMPORARY PILE USING BENDING RESTORING FORCE AND TEMPORARY STRUCTURE CONSTRUCTION METHOD THEREWITH}

The present invention relates to a piling temporary pile using a bending restoring load, and a construction method of a piling temporary installation using the same. More specifically, using a pile and a soil plate in the excavated ground to prevent the ground excavated by the earth pressure collapse, and to the construction method for the construction of the clogs to enable the construction of underground structures on the excavated inner ground.

In the case of conventional excavation by extending the ground in a predetermined depth and length direction, such as a building, an open tunnel, a subway, an electric power outlet, a communication port, a sewer pipe, and installing a structure in the internal space of the excavated ground, the excavated ground surface is always Since it is about to collapse by earth pressure (pulling earth pressure), as shown in FIG. 1A, a pile (10, thumb pile), such as H-beam, is first driven and buried in the ground, and the earth plate (20, Excavation ground support is installed by inserting the earthen board, usually wood).

At this time, the earth plate is installed in the pile is a horizontal beam-shaped strip (30, WALE, H-shaped steel) is installed, which connects the pile in the horizontal direction to each other, the pile 10 and the strip 30 is in the form of a grid This is to more effectively resist the main earth pressure acting as a structure.

Furthermore, between the strip and the strip, both ends are supported by the strip, across the excavation ground, so that the support beams 40 and STRUT are installed so that they can also resist earth pressure, which is also commonly used.

Since the support beam 40 is installed as a kind of lateral support beam between the strips installed on the ground excavation surface, so that it can more effectively resist the working earth pressure, it is used for almost all excavation ground support.

However, the conventional excavated ground supporters have their advantages, but the greater the excavation depth, the greater the magnitude of the earth pressure acting. Therefore, the number of vertical or horizontal installations of the support beam increases according to the excavation depth, and the installation interval (mostly 2-3M) As the size becomes smaller, it becomes a significant obstacle to the use of the excavation space, and especially when it is necessary to move the position of the brace already installed during work, it takes a lot of effort and time.

That is, it can be seen that five braces 40 are installed in order to install the underground structure 50 as shown in FIG. 1B. The bottom braces 41 are interfered with the upper end of the underground structure 50 so that the underground structure 50 is installed. Efficient operation of the brace is very important for the masonry because the concrete should be poured twice or several times, and if the brace is to be dismantled and re-installed, there will be a lot of loss in air and construction costs. This can be called.

As a method of increasing the vertical installation interval of the braces, a method of manufacturing a pile such as H-shaped steel 10 (thumb pile) by using a synthetic pile is introduced. In other words, synthetic piles with prestress are used as piles.

Specifically, as shown in FIG. 1C, the concrete 45 is poured into the tension portion 44 by giving a preflex load 20 to the H-shaped steel 10 and the H-shaped steel 10 having a constant rise, but both sides of the The groove 43 is formed in the longitudinal direction, and only the upper end of the type portion 46 is installed, and the flange 41 of the compression portion 42 is exposed without placing the concrete 45 and gradually removes the load to introduce prestress. The prestress pile which introduce | transduced the prestress in which the square part type type 46 was formed is introduced.

This can be said that the composite beam such as the preflex beam is made of piles, which is inevitably different from the present invention in that many facilities are inevitable in the process of introducing the preflex load, and above all, the piles are permanently buried in the ground. It can be said.

Thus, a method of introducing prestress into the H-peg itself has been introduced. That is, as shown in FIG. 1D, in the H-pile 20 having the flange connection part 1 and the two flanges 2 and 2 ', both sides of the intersection of the flange connection part 1 and the one side flange 2 are provided. A plurality of prestress generating means (10, 10 ') are formed, the prestress generating means (10) (10'), both ends of the plurality of cables (12, 12 ') on the anchor fixing plate (11) (11') spaced apart. In the peripheral portion of the anchor fixing plate 11, 11 'and the cable 12, 12' of the spaced apart, the pile for the temporary construction method using the prestress combined with the angle 15 on the enclosure has been introduced.

This means that prestress is introduced to the H-pile by using the tension of the tension material (cable) on the H-pile, which is advantageous in that the structure and the installation are simple, but the installation cost of the anchorage for introducing the prestress is rather expensive. There is a problem.

Accordingly, the present invention increases the bending rigidity of the conventional H pile to more effectively resist the earth pressure, such as in the installation of a retainer including a soil plate for resisting earth pressure, water pressure (hereinafter referred to as earth pressure) acting on the conventionally excavated ground Minimizing the displacement of the temporary facility against earth pressure and minimizing the installation interval of the brace, it is possible to make more economical earthquake construction.

The present invention to solve the above problems

First, in order to resist the earth pressure of the ground in which the pile and the earth plate are excavated by installing a pile in the excavation ground first, and installing a soil plate (wood, steel plate, etc.) between the piles. In this way, the earth pressure acting on the earth plate is eventually supported by the pile.

Accordingly, if the pile has increased bending stiffness, the earth pressure that the earth plate can withstand becomes large, thereby reducing the number of installation of the brace.

To this end, the present invention is to install the casing pile of the square steel tube first. The casing pile is manufactured in a closed cross section, but the earth plate fixing means for installing the earth plate on both sides is installed in advance.

Next, the bending pile is inserted into the casing pile so that the lower portion is supported and the upper portion of the bending pile is fixed to the casing pile.

As the bending pile is inserted into the casing pile, the bending pile is straightened to generate a restoring force to be restored to its original form. At this time, the restoring force is restrained by the casing pile, and the bending restoring load capable of resisting earth pressure is applied to the casing pile into which the bending pile is inserted.

That is, the bending restoring load is to have the effect of increasing the bending stiffness of the pile that can resist earth pressure.

Secondly, the casing pile and the bending pile are required to construct underground structures inside the facility, and after the backfilling is completed, the fixing state of the upper portion of the bending pile is dismantled, the bending pile is drawn out, and the casing pile is also drawn to enable reuse. Phosphorus earthquake facility was made possible.

Third, the bending pile uses the bent H-shaped steel and the casing uses the steel pipe in the form of a square steel pipe to effectively use the restoring force of the steel, and the earth plate fixing means can be easily formed.

To this end,

Casing pile of tubular shape installed in a straight line spaced apart from each other downwardly on the ground (G); And a bending pile which is inserted into the casing pile in a state in which the bending restoring load (P2) is bent in a direction opposite to the direction in which the earth pressure (P1) acts, and is installed to restrain the straightened state in the casing pile. Provides a piling temporary pile using a restoring load including a piling temporary pile using a restorative load.

Also preferably

Constructing a tubular casing pile installed in a straight line spaced apart from each other in the ground (G) downward; Constructing a bending pile to be inserted into the casing pile in a state in which the bending restoring load (P2) is applied in a direction opposite to the direction in which the earth pressure (P1) acts, to constrain the straight state of the casing pile; Constraining the upper and lower portions of the bending pile constructed to straighten the casing pile; And it provides a temporary construction method using the earthmoving facility construction method using the pile for the temporary facility using the restoring load, including the step of installing the earth plate between the casing pile.

Also preferably,

The lower part of the bending pile is supported by the support jaw formed in the lower inner side of the casing pile, and in the state installed so as to straighten straight, the pile for the temporary facility using a bending restoring load to be constrained to the casing pile by the fastener Provide the construction method of the earthenware used facility.

Also preferably,

Filling material is further filled in the casing pile into which the bending pile is inserted, wherein the casing pile uses a square steel pipe, the bending pile uses a bent steel H-pile, and both sides of the casing pile are fitted with earth plate. Provided the earth plate fixing device installed by the angled and steel plate member so that the earth plate is installed so that the earth plate is installed between the casing pile inserted the bending pile, and provide the construction pile using the bending restoring load and the construction method of the earthenware using the same. do.

The earthmoving facility according to the present invention can increase the bending stiffness of the pile that can resist earth pressure, thereby minimizing the number of installation of the girders and braces, thereby enabling efficient operation of the braces.

In addition, because the bending pile is manufactured in advance at the factory and simply press-installed at the site, no special equipment is required for construction, so quality control is easy, and the bending pile and casing can be recycled, which is environmentally friendly and economical This becomes possible.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

For example, even when the PSC girder is manufactured by pre-tension rather than post-tension, it can be regarded as belonging to the scope of the present invention as long as the lateral tension is introduced into the PSC girder in which the longitudinal tension is introduced.

1 is a cross-sectional view of a conventional PSC girder with a steel plate embedded in the upper flange,
Figure 2a is a functional state diagram of the bending restoring load (P2) by the coupling of the bending pile and the casing pile constituting the earthmoving facility of the present invention,
Figure 2b is a process of inserting the bending pile of the present invention in the casing pile spaced apart from each other and the earth wall installation perspective view,
Figure 2c and 2d is a load action diagram of the earthmoving facility of the present invention,
Figure 2e is a recovery construction of the bending pile and the casing pile of the present invention.
Figure 3a, 3b, 3c, 3d and 3e is a flow chart for the construction of the clogs using the restoring bending load according to the present invention and the construction of the clogging equipment using the same.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

[Installation and dismantling of piling temporary piles of the present invention]

Figure 2a shows the action state diagram of the bending restoring load (P2) by the coupling of the bending pile and the casing pile constituting the earthmoving facility of the present invention.

First, the bending pile 100 is to use the H-beam steel. Such H-shaped steel may be used as a factory product or may be manufactured by welding a steel plate with a built-up product.

Accordingly, the bending of the H-beams is performed. When bending the H-beams vertically, the bending restoring force, which is a restoring force generated in a direction opposite to the direction in which the earth pressure P1 acting on the temporary facility from the periphery of the excavated ground, acts ( Bend to have P2).

For example, bending is performed so that the bending restoring load P2 can be introduced in a direction opposite to the earth pressure acting in the horizontal direction while being installed on the ground so as to support the earth plate, and the H-beam is preliminarily maintained to maintain the bending state. Will be produced.

The bending is made to bend the H-shaped steel in the shape of an arc, but when the earthenment is 10m deep in the excavation depth of the facility, the displacement amount (d) of the central portion of the H-shaped steel by bending can be formed to about 40 cm. It may include those made by connecting the steel to each other.

In this case, a plurality of fastening holes 110 may be formed on the bending pile 100 to allow the fastener 230 to be described later to penetrate.

Accordingly, when the bending pile 100 is straightened, the bent pile will be referred to as the bending pile 100 according to the present invention.

This can be said to be representative of the bent steel H-beam (hereinafter referred to as H-beam) as shown in Figure 2a below.

The casing pile 200 serves as a guide pile to allow the bending pile 100 to be inserted therein as shown in FIG. 2A, and is formed in a straight beam shape so that the bending pile 100 is straightened while being inserted into the bending pile 100. It has the function of a constrained pipe to maintain this straight straight state and is distinguished from the casing simply to prevent the collapse of the drilling hole.

As the casing pile 200, a straight rectangular steel pipe made of steel may be used, and this will be described.

The casing pile 200 is manufactured in the form of a square steel pipe to have a closed cross section using a steel sheet in the form of an open top and a bottom open tubular shape, but secures an internal space in which the bending pile 100 described above can be inserted. It is made to be.

For example, when the bending pile 100 is inserted into the casing pile 200, the flange of the bending pile 100 may contact the inner surface of the square steel pipe so that the restoring force of the bending pile 100 may be transmitted to the casing pile. The size of the cross section can be determined.

At this time, both sides of the casing pile 200, the earth plate fixing device 210 is formed. Wood is most commonly used as an earthen board, but recently, steel sheets are also used in consideration of the degree of ordering.

In the present invention, look at the basis of the example using a steel sheet as a earth plate.

Since the steel sheet has a certain thickness, the angle members 220 spaced apart from each other, as shown in FIG. The angle member 220 may be installed using a bolt to the casing pile 200 made of steel.

Further, when manufacturing the casing pile 200 in advance, it is also possible to use an integrally formed angle member 220.

2b illustrates a process of inserting the bending pile 100 into the casing pile 200 spaced apart from each other.

First, the casing pile 200 is constructed by spaced apart from each other in advance on the ground (G). The casing pile 200 is preferably constructed in such a way that the casing pile 200 is inserted and installed after drilling the ground to form the drilling hole G1 in advance so as to maintain the shape thereof.

The separation distance of the casing pile 200 may be changed according to the excavation depth, and only two casing piles 200 are partially extracted in FIG. 2B.

When the casing pile 200 is installed on the ground (G), the bending pile 100 described above is inserted into the casing pile 200, respectively.

At this time, the bending pile 100 is bent, so that after the initial setting process of inserting the lower portion into the casing pile, the bending pile 100 can be easily inserted into the casing pile 200 by pressing or driving.

Such insertion can be more easily inserted into the casing pile 200 by using various friction reducing means such as lubricant, sliding material, sliding plate, etc., and noise can be reduced by using a hydraulic device or a vibrator.

At this time, the bending pile 100 is straightened while being inserted into the casing pile 200. This is because the casing pile 200 is formed in a straight line. In this process, the bending pile 100 has a restoring force to be restored to its original bent form.

At this time, the important point is that when the final bending pile 100 is inserted into the casing pile 200, the lower portion of the bending pile 100 to be supported by the support jaw 240 formed on the lower inner surface of the casing pile 200, the upper The fastening bolts, nuts, and the like by using the fastener 230 will be to restrain the bending pile 100 to the casing pile (200).

The support jaw is formed in the shape of an annular ring, block and the like, but there is no material limitation, but the same material as the casing pile is preferable.

That is, the state of the bending pile that is stably straightened on the casing end of the upper and lower openings is restrained as it is.

The restoring force inherent by such restraint acts on the casing pile 200 as it is, and this restoring force allows the bending restoring load P2 to be introduced into the casing pile 200.

That is, as shown in FIG. 2a, the bending restoring load P2 acts in a direction (opposite to the direction of earth pressure action) that resists the earth pressure P1 acting on the earth plate, and the meaning of the bending restoring load P2 is As the bending pile is deformed by the casing pile, it can be said that the restoring force is generated in the form of reaction force to resist the earth pressure.

Further, although not shown, it is preferable to insert the bending pile 100 into the casing pile 200 and then to fill the filler such as sand to prevent deformation of the bending pile 100 due to unexpected action.

As a result, when the bending pile 100 is restrained on the casing pile 200, the earth plate 300 such as a steel sheet is inserted into the earth plate fixing device 210 formed on the casing pile 200 as shown in FIG. 2B.

Thus, the earth pressure acts on the earth plate 300, and the earth pressure is transmitted to the casing pile 200 as it is, and the bending restoring load P2 acts on the earth pressure P1, so that the earth plate is not conducted by the earth pressure. The installation will remain as it is.

Next, as shown in FIG. 2C, the bracket 410 is installed on the casing pile 200, and then the band 420 is installed, and the support 430 is additionally installed between the band 420 installed on the adjacent earth plate. .

The brace 430 is installed up and down in the ground excavation direction, the presence of the brace 430 is preferably installed to the minimum to interfere with the construction of the structure to be built therein.

However, the vertical separation distance of the brace 430 should be based on the premise of meeting the safety of the temporary facility, thereby minimizing the earth pressure to be burdened by the brace 430, thereby increasing its vertical separation distance.

According to the present invention, the bending pressure of the bending pile 100 is greatly increased by the bending restoring load (P2), so that the ability to resist the earth pressure is increased as compared with the H pile, which is steel installed under the same conditions. As a result, the size of the earth pressure that the bending pile bears increases.

Furthermore, in the present invention, the resistance to earth pressure can be resisted by the rigidity of the bending pile itself and the rigidity of the casing pile 200 itself in addition to the bending restoring load (P2) of the bending pile as shown in FIG. 2D. The space for increasing the vertical separation distance is increased, thereby minimizing the number of props installed, and greatly improving the construction construction air, cost and constructability.

Figure 2e is a construction drawing to recover the bending pile 100 and the casing pile 200 of the present invention.

That is, when the construction of the temporary facility is completed, the construction of the underground structure required for the excavation space inside the earthquake facility is completed. When the final underground structure construction and the backfill are completed, the bending pile 100 and the casing pile 200 of the present invention are recovered. .

Accordingly, the upper portion of the bending pile 100 and the casing pile 200 are dismantled, that is, the fastener 230 is dismantled, and the wire is connected to the upper portion of the straight bending tube 100 to bend and slowly bent. It will draw the pile 100.

The drawn bending pile 100 can be reused as it is, and also by drawing the casing pile 200 to enable recycling.

At this time, after the casing pile 200 is drawn out, the earth and sand are filled again in the space occupied by the casing pile and finished.

[Method of constructing temporary block facility using pile for temporary block facility using bending restorative load]

3A to 3E illustrate the construction method for constructing the earthquake temporary facility according to the present invention, that is, the method for constructing the temporary facility using the bending pile 100 and the casing pile 200.

First, the casing pile 200 of the present invention is constructed along the land boundary line of the ground to excavate the ground as shown in FIG. 3A and to construct the underground structure 500.

This may be done by first drilling the ground using an excavator not shown in the ground (G) to form a drilling hole (G1) and inserting the casing pile 200 into the drilling hole (G1).

The casing pile 200 can be seen that the plurality is spaced apart from each other and in Figure 3a it can be seen that a plurality of casing pile 200 is installed on the ground in a square shape.

Next, the bending pile 100 described above is inserted into the casing pile 200 by a driving method. In this process, the bending pile 100 is straightened and has a restoring force, so that the bending restoring load (P2) is applied later.

At this time, when the bottom of the bending pile 100 completes the insertion of the bending pile 100 to be supported by the support jaw 240 formed at the bottom of the casing pile 200 as shown in FIG. 2A, the bending restoring load P2 is earth pressure. As shown in FIG. 3B, the upper portion of the bending pile 100 may be restrained to the casing pile 200 by using the fastener 230.

In this way, the stable bending pile 100 may be installed and the flange may be in close contact with the inner surface of the casing pile 200 to minimize the loss of the bending restoring load (P2).

Next, as shown in FIG. 3b, the earth plate 300 is inserted between the earth plate fixing devices 210 formed on the casing pile 200 while excavating the inner ground of the casing pile 200, and the bracket and the strip are installed. 430 will be installed.

These earth plate, brackets, strips and braces are installed while drilling to the minimum drilling depth required for installation.

In Figure 3c is shown a state in which the support 430 is installed on the excavation ground and the underground structure 500 is installed in the lower state. Of course, if the excavation depth becomes larger, it is necessary to install a plurality of braces 430, but it can be seen that the number of installation of the braces can be much reduced in comparison with FIG. 1B.

Next, when the construction of the underground structure 500 is completed, as shown in FIG. 3d, backfilling and compaction work on the excavation ground, and then dismantle the braces, strips, brackets and underground structures (500) in the ground by the final backfill and compaction work. Will complete.

Next, after disassembling the fastener 230, as shown in FIG. The pile 200 is also drawn together so that the final casing pile 200 and the bending pile 100 can be recycled.

Thus, after the drawing of the casing pile 200, the ground hole (by casing pile) remaining in the ground is filled with earth and sand to finish the construction.

As such, the present invention can minimize the work for the installation of the support 430, so that the most cost and workability of the poor work can be efficiently managed, and in the case of the bending pile 100 and the casing pile 200 can be recycled It will be able to drastically reduce construction cost and air.

100: bending pile
200: casing pile
210: earth plate fixing device
220: angle member
230: fastener
240: support jaw
300: earth plate
410: bracket
420: Sash
430: brace
500: underground structure

Claims (9)

Casing pile 200 of the tubular shape installed in a straight line spaced apart from each other in the ground (G) downward; And
Bending pile 100 is inserted into the casing pile 200 in a state in which the bending restoring load (P2) is bent in the direction opposite to the direction in which the earth pressure (P1) acts so that the straightened state is restrained in the casing pile. Soil pag for temporary use of a restoring load, characterized in that it comprises a. The method of claim 1,
The bending pile 100 is to be supported by the support jaw 240 formed in the lower inner side of the casing pile in a state in which it is installed in a straight line, the upper portion to the casing pile 200 by the fastener 230 The earthenware temporary pile using the bending restoring load, characterized in that the fastening pile is fastened to the inside of the casing pile 200 is fastened. The method of claim 1,
Filling material is further filled in the casing pile into which the bending pile is inserted, wherein the casing pile 200 uses a square steel pipe, and the bending pile 100 uses a bent steel H-shaped steel. Picket pile for the construction. The method of claim 1,
On both sides of the casing pile 200, the earth plate plate 300 is installed between the casing pile in which the bending pile is inserted so that the earth plate fixing device 210 installed by the angle member 220 spaced apart so that the earth plate is inserted and installed is installed. Soil fence temporary pile using the restoration of the bending load, characterized in that to be installed. Constructing a casing pile 200 having a tubular shape linearly spaced apart from each other in the ground (G) downward;
The bending pile 100 is inserted into the casing pile 200 in a state in which the bending restoring load P2 is applied in a direction opposite to the direction in which the earth pressure P1 acts, so that the straightened state is restrained in the casing pile. Constructing;
Constraining the upper and lower portions of the bending pile 100 constructed to straighten the casing pile 200; And
Installing the earth plate 300 between the casing pile 200
A construction method of the earthquake temporary facility using the pile for the temporary facility using a bending restoring load comprising a. 6. The method of claim 5,
Inside the casing pile into which the bending pile is inserted, the filling material including sand or soil is further filled, and the casing pile 200 uses a square steel pipe, and forms a perforated hole in the ground first and then drills the square steel pipe in the perforated hole (G1). To be installed on the ground,
Wherein the bending pile 100 using the bent steel H-shaped steel using the bending restoring load, characterized in that it is inserted into the casing pile (200) by the bending restoring pile. 6. The method of claim 5,
The bending pile 100 is to be supported by the support jaw 240 formed in the lower inner side of the casing pile in a state in which it is installed in a straight line, the upper portion to the casing pile 200 by the fastener 230 The construction method of the earthquake temporary facility using the pile for the temporary installation using the bending restoring load, characterized in that the fastening pile 100 is fastened to the casing pile (200). 6. The method of claim 5,
On both sides of the casing pile 200, the earth plate fixing device 210 installed with the angle member 220 spaced apart so that the earth plate 300 can be fitted and installed in advance is installed, and the earth plate between the casing pile into which the bending pile is inserted. The construction method of the earthquake temporary facility using the pile for the temporary furniture using the bending restoring load, characterized in that the 300 to be installed. 6. The method of claim 5,
Installing a plurality of bands 420 on the casing pile 200 in which the earth plate 300 is installed;
Installing a support 430 between the strips;
Constructing an underground structure 500 in a work space between earth plates facing each other by the support 430; And
When the construction of the underground structure is completed, after dismantling the brace and the strip and dismantling the bending pile 100 bound by the fastener 230 to the casing pile 200, the bending pile 100 Simultaneous construction method using a pile for the temporary furniture using a bending restoring load, characterized in that it further comprises the step of drawing the casing pile 200 with drawing.

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