KR20110132909A - Underpass using precast concrete pile and method for constructing the same - Google Patents

Abstract

PURPOSE: An underpass using prefabricated concrete piles and a construction method thereof are provided to effectively resist stress applied to the connected parts of a pile body and upper and lower slabs. CONSTITUTION: An underpass using prefabricated concrete piles comprises pile walls(11), upper and lower slabs(12,13), steel wales(14), multiple semi-cylindrical connectors, and multiple first, second, third and fourth fixing bolts. The pile walls are formed by installing multiple prefabricated concrete piles in a row. The upper slab connects the top ends of the pile walls to each other. The lower slab connects the bottom ends of the pile walls to each other. The steel wales are buried in the upper and lower slabs. The connectors are inserted into spaces between the prefabricated concrete piles. The first and second fixing bolts fix the connectors to the prefabricated concrete piles. The third and fourth fixing bolts couple the connectors to the steel wales.

Description

Underpass using precast concrete pile and method for constructing the same}

According to the present invention, in the underground roadway where the lower slab connecting the bottom of the wall and the lower slab connecting the lower end of the wall and the upper slab connecting the upper end of the wall form a box-shaped cross section, the wall is composed of the ready-made concrete pile while the wall is made of the ready-made concrete pile. It relates to an underground roadway and its construction method to improve the joint structure of the upper and lower slabs composed of pile walls and cast-in-place concrete.

An underground roadway is an underground structure that is installed to cross the lower part of a road or railroad so that a person or a vehicle can safely cross the road without interfering with the operation of the road or railroad vehicle. The underground roadway is a lane divider for the safety of a passing vehicle, having a box-shaped cross-section with a lower slab connecting the lower sides of the wall and a lower slab connecting the lower end of the wall and the upper slab connecting the upper end of the wall. In order to reinforce the insufficient load capacity of the slab, a central separation wall or a plurality of central separation columns may be installed to connect the upper slab and the lower slab along the passage direction.

Underground roadways may be post-installed to cross the underside of existing roads or railroads, or the underground roadway may be constructed first and then the roads or railroads may be laid over them. In the former case, suitable temporary facilities or special construction methods are to be installed to prevent settlement of existing roads or railways. In the latter case, the earthquake wall is constructed with H pile, earth plate or sheet pile, the earthquake wall is supported by the bandage and brace, and the excavation is carried out to the required depth, and then the lower slab, the wall and the upper slab are constructed in order by concrete casting. . At this time, the H pile and the earth plate or sheet pile are to be removed after construction of the underground roadway as a temporary facility for excavation. In the case of underground roadway that is constructed by the site casting method, the cost increases due to the installation and dismantling of the temporary facility, the extension of the construction period, the formwork installation, the reinforcing steel assembly, the concrete placing for the construction of the lower slab, the wall and the upper slab by the site casting method. And there is a problem of a lot of field personnel and air delay due to curing.

Patent application No. 2008-133206, 'Method for constructing underground roadways using a composite wall pile', has been proposed to solve the problems of conventional underground roadway construction. This application is to construct the composite concrete wall pile on the side of the sidewall of the underground roadway to serve as the H pile wall and the cast concrete wall at the same time. The stud welded to the lower part of the exposed steel plate formed between the composite wall pile The lower slab is integrated with the wall pile using bolts and moment plates. However, the prior application has a disadvantage in that the application is limited because the application is a specially designed ready-made concrete pile installed to expose the C.T-shaped steel or c-shaped steel on one side with a rectangular pillar shape having a hollow inside.

The present invention is to solve the disadvantages of the conventional cast-in-place concrete method and the invention of the prior application, a pile wall consisting of ready-made concrete piles while constituting the wall with a cylindrical concrete pile having a hollow that is most commonly applied as a support pile It is an object of the present invention to provide an underground roadway and a construction method for improving the joint structure of upper and lower slabs composed of concrete and cast-in-place concrete.

Underground roadway using a ready-made concrete pile according to a preferred embodiment of the present invention is a pile wall body formed by installing a plurality of ready-made concrete piles having a cylindrical shape in a row along the vehicle traveling direction; An upper slab formed to connect upper ends of the pile walls on both sides; A lower slab formed to connect lower ends of the pile walls on both sides; A steel strip installed across the horse shaft wall at a position where the upper slab and the lower slab are connected and embedded in the upper slab and the lower slab, respectively; A plurality of semi-cylindrical joints each inserted into a space between the steel strip and adjacent ready-made concrete piles; A plurality of first and second fixing bolts respectively fixing semicylindrical joints to neighboring ready-made concrete piles; And a plurality of third and fourth fixing bolts for joining the semi-cylindrical coupler to the steel strip.

According to another suitable embodiment of the present invention, the first fixing bolt is fixed to any one of the ready-made concrete piles adjoining each other through the semi-cylindrical joint, and the second fixing bolt is passed through the semi-cylindrical joint. It is fixed to the other of the neighboring ready-made concrete piles.

According to another suitable embodiment of the present invention, one end of the third fixing bolt is fixed to the inner surface of the semi-cylindrical joint and the other end is coupled through the steel strip, one end of the fourth fixing bolt is fixed to the ready-made concrete pile and the other end Is bonded through the steel strip.

In the method of constructing an underground roadway using ready-made concrete piles according to a preferred embodiment of the present invention, a plurality of ready-made concrete piles having a hollow cylindrical shape are constructed in a row to contact each other along a vehicle traveling direction to form pile walls on both sides. Making; Excavating the interior between the pile walls and joining the semi-circular joints between the ready-made concrete piles, and then fixing the steel bands and repeatedly installing the props between the opposite steel bands to excavate to the design depth; Reinforcing the ends of the lower slab reinforcing bars to be joined to the steel strip and pouring concrete to form the lower slab; And reinforcing the end of the upper slab reinforcing bar to be joined to the steel strip and pouring concrete to form the upper slab.

In the underground roadway using the ready-made concrete piles according to the present invention, since the pile wall functions as a retaining wall, a separate provisional retaining wall is unnecessary for the excavation of the underground driveway, which is constructed as a detachable structure, and to install a strip for supporting the retaining wall. There is an advantage that the bracket for the unnecessary.

In addition, the upper and lower slabs can be welded to the pile wall by welding the steel bars of the upper and lower slabs to the steel strip without removing the steel strip after the excavation.

In addition, since the ends of the upper and lower slabs are reinforced by a steel strip, the structure is capable of effectively resisting the stress generated at the junction of the pile wall and the upper and lower slabs.

In addition, since the pile wall is used as temporary wall and permanent wall, the use of temporary structure is minimized and the excavation width is reduced, thus reducing the air shortage and construction cost.

The following drawings, which are attached in the present specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1 is a cross-sectional view showing an underground roadway using the ready-made concrete piles according to the present invention.
Figure 2a is a cross-sectional view showing a structure in which the steel strip is bonded to the concrete concrete pile, Figure 2b is a perspective view.
3 is a cross-sectional view showing a state that the lower slab is strongly coupled to the pile wall.
4 is a view showing in sequence the construction method of the underground road according to the present invention.
5 is a cross-sectional view showing an example of a coupling structure of the ready-made concrete pile and the upper slab.

In the following the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the embodiments presented are exemplary for a clear understanding of the present invention is not limited thereto.

1 is a cross-sectional view showing an underground roadway using a ready-made concrete pile according to the present invention, Figure 2a is a cross-sectional view showing a structure in which the steel strip is bonded to the ready-made concrete pile, Figure 2b is a perspective view, Figure 3 is a lower portion on the pile wall This is a cross-sectional view showing the slab is strongly bonded.

1 to 3, the underground roadway according to the present invention, the pile walls (11, 11) on both sides consisting of a number of ready-made concrete piles 111, the upper ends of the pile walls (11, 11) on both sides of each other The upper slab 12 for connecting, the lower slab 13 for connecting the lower ends of the pile walls 11 and 11 on both sides, the horse shaft wall 11, in the position where the upper slab 12 and the lower slab 13 are connected; 11 installed in the space between the steel strip 14, the steel strip 14 and the adjacent concrete pile 111 adjacent to each other is installed across the upper slab 12 and the lower slab 13, respectively. A plurality of first and second fixing bolts (16,17), semi-cylindrical joints (15) and steel for joining two semi-cylindrical joints (15), semi-cylindrical joints (15) to the ready-made concrete pile (111) It includes a plurality of third fixing bolts 18 for coupling the strip 14.

In the present invention, the sidewall of the underground roadway is constructed using the ready-made concrete piles, not the cast-in-place concrete structure, and the ready-made concrete piles have a cylindrical shape having hollows known in the art. In other words, precast prestressed concrete piles and prestressed concrete prestressed by prestressed concrete piles and tensioning materials are pre-introduced by prestressed concrete piles and tensioning materials. It can be divided into PHC pile produced by molding, all of these piles can be applied in the present invention. Thus, the present invention has the advantage that it is easy to obtain by applying a known ready-made concrete pile.

The ready-made concrete pile 111 is installed to be in contact with each other in a line along the traveling direction of the vehicle to form a continuous wall of piles. The back surface of the pile wall 10, that is, the surface of the side in contact with the back soil may be grouted for the degree. The method of grouting for the order may be arbitrarily selected from methods known in the art to which this invention belongs. The pile walls 11 and 11 configured as described above function as temporary temporary wall to prevent the earth and sand from collapsing on the back side for constructing the underground roadway, and also form sidewalls of the underground roadway as a permanent structure. Therefore, according to the present invention has the advantage that it is not necessary to construct a temporary temporary wall separately.

The upper slab 12 and the lower slab 13 are strongly joined to upper ends of the walls 11 and 11 on both sides formed of a plurality of ready-made concrete piles 111, respectively. The upper slab 12 and the lower slab 13 can be constructed in a known cast-in-place concrete manner.

In the position where the upper slab 12 and the lower slab 13 are connected, the steel strip 14 is installed across the pile wall 10 and is embedded in the upper slab 12 and the lower slab 13, respectively. The steel strip 14 serves to prevent the conduction of the pile walls 11 and 11 serving as the retaining wall by installing a brace when excavating between the pile walls 11 and 11 on both sides, and after the excavation is completed, Embedded in the slab 12 and the lower slab 13 so as to strongly bond (moment bond) the pile walls 11 and 11 and the upper slab 12 and the pile walls 11 and 11 and the lower slab 13. Are utilized. Steel strip 14 may be composed of the most commonly used H-shaped steel as a band for supporting the earth wall in this field, but is not limited to the present invention, C-shaped steel, a-beam, such as any known in this field Shape steel or assembly members may be used. As shown in FIG. 3, the steel strip 14 is firmly fixed to the pile 111 through the semi-cylindrical joint 15 and the main reinforcing bars of the upper and lower slabs 12 and 13 are fixed to the steel strip 14. By welding 121 and 131, the joining of the pile walls 11 and 11 and the upper and lower slabs 12 and 13 becomes a steel joint structure.

As in FIGS. 2A and 2B, the steel strip 14 is firmly fixed to the pile walls 11 and 11 through a plurality of semi-cylindrical joints 15. The semi-cylindrical joints 15 are respectively inserted in the space between the steel strip 14 and the adjacent concrete pile 111 adjacent to each other. The semi-cylindrical splice 15 may have an appropriate radius corresponding to the diameter of the ready-made concrete pile 111 so as to contact all of the outer surfaces of the ready-made concrete pile 111 adjacent to each other, and the height of the steel strip 14 It may have the same height. The semi-cylindrical splice 15 may be made of any material known in the art and preferably made of steel.

The semi-cylindrical splice 15 is fixed to the ready-made concrete pile 111 adjacent to each other by a plurality of first, second fixing bolts (16, 17). That is, the first fixing bolt 16 is fixed to any one of the ready-made concrete pile 111 adjacent to each other by passing through the semi-cylindrical connecting hole 15 and the second fixing bolt 17 is a semi-cylindrical connecting hole ( The semi-cylindrical splices 15 may be firmly fixed while being in contact with the outer surfaces of the adjacent concrete piles 111 adjacent to each other by being fixed to the other one of the adjacent concrete piles 111 that penetrate through 15). . The first and second fixing bolts 16 and 17 may be installed on a line extending from the center of the ready-made concrete pile 111 to the center of the semi-cylindrical joint 15, and thus the first and second fixing bolts 16 and 17. The angle formed by) may be a right angle. The first and second fixing bolts 16 and 17 drill holes in the ready-made concrete piles 111 and in the holes. The fixing bolts 16 and 17 may be fixed to the ready-made concrete pile 111 by inserting the ends of the fixing bolts 16 and 17 and then filling the non-shrink mortar or the resin. The first and second fixing bolts 16 and 17 may be welded to the semi-cylindrical joints 15 or may be fixed by fastening nuts.

The semi-cylindrical splice 15 and the steel strip 14 is bonded to each other by a plurality of third fixing bolts 18. One end of the third fixing bolt 18 is fixed to the inner surface of the semi-cylindrical coupling port 15 and the other end penetrates the steel strip 14. The third fixing bolt 18 may be coupled to the steel strip 14 by welding or fastening the nut. The third fixing bolt 18 may be installed in a direction perpendicular to the steel strip 14, that is, in a radial direction of the ready-made concrete pile 111.

A fourth fixing bolt 19 may be further installed to fix the steel strip 14 to the ready-made concrete pile 111 more firmly. One end of the fourth fixing bolt 19 is fixed to the ready-made concrete pile 111 and the other end penetrates the steel strip 14. The fourth fixing bolt 19 may be installed in a direction perpendicular to the steel strip 14, that is, in a radial direction of the ready-made concrete pile 111.

In the present invention, the first, second, third, and fourth fixing bolts 16, 17, 18, and 19 may be steel rods, deformed steel bars, full-threaded bolts threaded to a full length, or steel bars threaded only to a certain length. Can be.

Thus, the upper and lower slabs (12, 13) by the steel strip 14, which is embedded in the upper, lower slabs (12, 13) while supporting the pile wall (11) functioning as a wall of the soil wall pile piles Strongly bind to (11). In addition, since the end portions of the upper and lower slabs 12 and 13 are reinforced by the steel strip 14, the upper and lower slabs 12 and 13 can effectively resist the stresses generated at the junction of the pile wall 11 and the upper and lower slabs 12 and 13. It becomes a structure.

Hereinafter, the construction method of the underground roadway using the ready-made concrete piles according to the present invention configured as described above will be described in detail.

4 is a view showing in sequence the construction method of the underground road according to the present invention.

First, as in (a), the construction of the ready-made concrete pile 111 to form a pile wall (11). The ready-made concrete pile 111 may be constructed by a type pile method or an embedded pile method known as a method of constructing a pile. Preferably it can be constructed by the embedded pile method in order to minimize the construction error, and more preferably can be constructed by the hollow drilling method after drilling in combination with a known embedded pile method. Since the pile 111 itself is impermeable or the connections between the piles may not be completely adhered, leakage may occur through the pile 111. Therefore, grouting can be performed for waterproofing the space between piles on the back of the pile.

Next, as shown in (b), the interior between the pile wall 11 is excavated and the semi-circular spherical splice 15 is coupled between the ready-made concrete pile 111, and then the steel strip 14 is fixed. Subsequently, as shown in (c), the brace 20 is installed between the facing steel strips 14. When the length of the brace 20 is long, a center pile (not shown) may be installed between the pile walls 11 on both sides. When the support 20 is installed and the pile wall 11 that functions as a retaining wall is supported, the excavator is excavated again and the above process is repeated to excavate to the design depth.

Next, as shown in (d), the lower slab reinforcing bars 131 are placed and concrete is poured to form the lower slab 13. At this time, the lower slab reinforcing bar 131 may be welded to the steel strip 14, and thus the lower slab 13 may be strongly coupled to the pile wall (11).

Next, as in (e), the upper slab reinforcement 121 is placed and concrete is poured to form the upper slab 12. At this time, the upper slab reinforcement 121 may be welded to the steel strip 14, and thus the upper slab 12 may be strongly coupled to the pile wall (11). And the connection of the upper slab 12 and the ready-made concrete pile 111 may apply any coupling method known in the art. 5 shows an example, the upper slab 12 and the ready-made concrete pile 111 by inserting the filling concrete reinforcement 122 into the pile 111 and filling concrete in the pile 111. Can be connected to each other.

Finally, the construction of the underground roadway is completed by closing the exposed surfaces of the pile wall 11, the lower slab 13, and the upper slab 12, wrapping the upper surface of the lower slab 13, and then covering the surface.

As described above, in the underground roadway using the ready-made concrete pile according to the present invention, since the pile wall 11 functions as a retaining wall, a separate temporary wall of the temporary wall is unnecessary for excavation of the underground roadway that is constructed as a detachable and steel strip. Since the 14 is firmly fixed to the pile wall 11 by using the semi-cylindrical junction port 15, there is an advantage that a bracket for installing a strip for supporting the retaining wall is unnecessary. Further, after the excavation, the upper and lower slabs 12 and 13 are welded to the pile wall 11 by welding the main steel bars of the upper and lower slabs 12 and 13 to the steel strip 14 without removing the steel strip 14. You can. In addition, since the end portions of the upper and lower slabs 12 and 13 are reinforced by the steel strip 14, the upper and lower slabs 12 and 13 can effectively resist the stresses generated at the junction of the pile wall 11 and the upper and lower slabs 12 and 13. It becomes a structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is only limited by the scope of the appended claims.

11: pile wall
12: upper slab
13: lower slab
14: Steel Belt
15: Semi-cylindrical splice
16: 1st fixing bolt
17: second fixing bolt
18: third fixing bolt
19: 4th fixing bolt

Claims (4)

Pile walls on both sides configured by installing a plurality of ready-made concrete piles having a cylindrical shape in a row along a vehicle traveling direction;
An upper slab formed to connect upper ends of the pile walls on both sides;
A lower slab formed to connect lower ends of the pile walls on both sides;
A steel strip installed across the horse shaft wall at a position where the upper slab and the lower slab are connected and embedded in the upper slab and the lower slab, respectively;
A plurality of semi-cylindrical joints each inserted into a space between the steel strip and adjacent ready-made concrete piles;
A plurality of first and second fixing bolts respectively fixing semicylindrical joints to neighboring ready-made concrete piles; And
Underground driveway using a ready-made concrete pile, characterized in that it comprises a plurality of third, fourth fixing bolts for joining the semi-cylindrical junction and the steel strip. The method according to claim 1,
The first fixing bolt is fixed to any one of the ready-made concrete piles adjacent to each other through a semi-cylindrical joint,
The second fixing bolt is an underground roadway using a ready-made concrete pile, characterized in that the penetrating through the semi-cylindrical connection hole is fixed to the other one of the adjacent concrete piles. The method according to claim 1,
One end of the third fixing bolt is fixed to the inner surface of the semi-cylindrical junction and the other end is coupled through the steel strip,
One end of the fourth fixing bolt is fixed to the ready-made concrete piles and the other end is an underground roadway using the ready-made concrete piles, characterized in that coupled through the steel strip. Constructing a plurality of ready-made concrete piles having a cylindrical shape in a row along a vehicle traveling direction to form pile walls on both sides;
Excavating the interior between the pile walls and joining the semi-circular joints between the ready-made concrete piles, and then fixing the steel bands and repeatedly installing the props between the opposite steel bands to excavate to the design depth;
Reinforcing the ends of the lower slab reinforcing bars to be joined to the steel strip and pouring concrete to form the lower slab; And
A method of constructing an underground roadway using a ready-made concrete pile, comprising the step of forming the upper slab by reinforcing the end of the upper slab reinforcing bars to be joined to the steel strip and to cast concrete.

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