KR20220035621A - Bridge construction method using reinforcing column unit and soil nailing - Google Patents

Abstract

The present invention provides a bridge construction method using a reinforcing column unit and soil nailing, comprising: a ground base survey step; a step of installing the reinforcing column unit in a vertical direction at both sides spaced by a prescribed distance; a step of performing a foundation excavation work on a front side of the reinforcing column unit and a soil nailing reinforcing work in a form of penetrating a terrain and the reinforcing column unit; a step of constructing an abutment in a form connected with the reinforcing column unit and the soil nailing; and a step of constructing a bridge connecting an upper part of the abutment. The bridge construction method is configured to efficiently construct the bridge.

Description

Bridge construction method using reinforcing column unit and soil nailing}

The present invention relates to a bridge construction method, and more specifically, a bridge construction method using reinforcing column units and saw nailing that simplifies the process in the construction method and provides structural stability to the horizontal and vertical earth pressures of the bridge as a whole. It's about.

In general, a bridge is a structure that connects land on both sides of a river and is designed to allow vehicles or people to move across the upper surface of the bridge.

In the construction of such a bridge, first, the flow of water is prevented, the ground surface of the place where the pillar is installed is evenly prepared, and then the concrete is poured, and a wide footing is installed. Then, thick pillars are installed on top of these footings, and the upper part of the bridge is formed on top of them.

Figures 1 and 2 are flow charts schematically showing the process of constructing a conventional bridge.

In the ground where there is an urban river, as shown in Figure 1(a), a ground investigation is performed through drilling on both sides centered on the river, as shown in Figure 1(b).

Next, as shown in FIG. 1(c), a step of installing reinforcing columns using a known technology is performed at positions spaced apart from each other on both sides of the river center.

Afterwards, as shown in FIG. 1(d), foundation excavation work using racker support is performed, and then the step of constructing the lower abutment pile foundation of the bridge is performed as shown in FIG. 2(e).

Next, after going through the bridge construction stage as shown in Figure 2(f), the back of the bridge is filled, soil piled up, and compaction work is performed as shown in Figure 2(g).

Finally, the entire bridge construction work is completed by grading as shown in Figure 2(h).

Bridges built using the conventional bridge construction method as described above were vulnerable to structural safety because the reinforcing columns supported both horizontal and vertical earth pressures, resulting in a large load.

In addition, there was a problem that a significant pile foundation was needed at the bottom of both sides of the bridge.

Furthermore, the entire bridge construction process required a lot of man-hours and was not economical.

Republic of Korea Patent No. 10-1653606

The present invention was devised to solve the problems of the prior art described above, and is intended to provide a bridge construction method configured to enable the bridge construction process to be carried out efficiently.

In addition, the purpose of the present invention is to provide a bridge construction method that can bring about safety during construction and at the same time structural stability of the entire bridge through integrated behavior with the abutment even after construction.

In addition, the purpose of the present invention is to provide a bridge construction method that allows economical construction with a small amount of foundation excavation and no need for pile construction.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the present invention includes a ground investigation step; Installing reinforcing column units in an up and down vertical direction on both sides spaced apart from each other by a predetermined distance; Performing foundation digging work on the front side of the reinforcing column unit and soil nailing reinforcement work in a manner that penetrates the terrain and the reinforcing column unit; Constructing an abutment in a form connected to the reinforcement column unit and the saw nailing; and constructing a pier connecting the upper part of the abutment. It provides a bridge construction method using a reinforcing column unit and saw nailing, including a step.

Here, the soil nailing is installed with a preset length exposed to the outside of the reinforcement column unit, and may further include the step of installing a pair of acupressure plates in a spaced apart form on the front end of the exposed soil nailing. You can.

In addition, the step of performing the foundation excavation work on the front side of the reinforcement column unit and the soil nailing reinforcement work in a form that penetrates the terrain and the reinforcement column unit, involves excavating the foundation foundation from the top and the terrain and reinforcement column unit in a top-down manner. Soil nailing reinforcement work can be done repeatedly in a penetrating form.

The bridge construction method according to an embodiment of the present invention configured as described above has the following effects.

First, according to the bridge construction method according to an embodiment of the present invention, the horizontal earth pressure of the topography on both sides of the bridge is supported using reinforcing column units and saw nailing, and the abutments of the bridge are made to support only the vertical earth pressure. Accordingly, efficient structural safety can be achieved.

Second, according to the bridge construction method according to an embodiment of the present invention, the abutments of the bridge support only the vertical earth pressure, thereby eliminating the need for pile foundation construction work as in existing bridges, thereby improving work efficiency.

Third, according to the bridge construction method according to an embodiment of the present invention, by applying a double pressure plate system, it is possible to sufficiently ensure safety by bringing about integrated behavior of saw nailing and bridge abutment.

Fourth, according to the bridge construction method according to an embodiment of the present invention, the first pressure plate among the dual pressure plates supports the reinforcing column unit to ensure safety during construction, and the second pressure plate supports the integrated behavior of saw nailing and abutments. By achieving this effect, structural safety can be secured.

Fifth, according to the bridge construction method according to an embodiment of the present invention, since the bridge is constructed using reinforcing column units and saw nailing, the amount of foundation excavation is minimized, the construction process is simplified, and economical construction can be achieved. .

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 and 2 are flowcharts schematically showing one form of a bridge construction method according to the prior art;
3 and 4 are flowcharts schematically showing a bridge construction method according to an embodiment of the present invention;
Figure 5 is a view showing a drilled hole formed;
Figure 6 is a view showing a reinforcement column unit being installed in a drilled hole;
Figure 7 is a plan view showing reinforcement column units arranged in a row;
Figures 8 to 10 sequentially show how nailing is installed in a top-down manner;
Figure 11 is a view showing the bridge abutment installed in an integrated form with Soil Nailing's second pressure plate;
Figure 12 is a perspective view showing an alternating connection unit installed in a reinforcement column unit according to another embodiment of the present invention;
Figure 13 is a plan view showing the alternating connection unit installed in the reinforcement column unit according to another embodiment of the present invention;
Figure 14 is a side cross-sectional view showing a shift to which a shift connection unit according to another embodiment of the present invention is applied;
Figure 15 is a perspective view of the H beam applied to the alternating connection unit of Figures 12 to 14;
Figure 16 is a side cross-sectional view showing a bridge to which an alternating connection unit is applied according to another embodiment of the present invention; and
Figure 17 is a perspective view showing an instruction rod applied to Figure 16.

Hereinafter, preferred embodiments of the present invention, in which the object of the present invention can be realized in detail, will be described with reference to the attached drawings. In describing this embodiment, the same names and the same symbols are used for the same components, and additional description accordingly will be omitted.

First, a preferred embodiment of the present invention will be described with reference to the attached drawings.

Figures 3 and 4 are diagrams sequentially showing a bridge construction method according to an embodiment of the present invention.

First, on a terrain with a river as shown in Figure 3(a), an overall ground investigation process such as soil and strength in the ground is performed through ground drilling on both sides centering on the river as shown in Figure 3(b).

Next, as shown in FIG. 3(c), the step of installing the reinforcement column unit 12 in the vertical direction up and down on the terrain on both sides centered on the river is performed.

Here, the reinforcing column units 12 are configured to support the horizontal earth pressure of the terrain behind each reinforcing column unit 12, and various types of known structures may be applied. One form of the reinforcement column unit 12 that can be applied to this embodiment will be described later.

Next, as shown in Figure 4(d), a saw nail is used to ensure that each reinforcement column unit (12) is firmly fixed and supported on the rear terrain while excavating the terrain between the reinforcement column units (12) on both sides. Perform the steps to install the ring (21).

At this time, the sole nailing 21 is installed so that its end is exposed to the outside of the reinforcement column unit 12, and a double acupressure plate 23, 24 is installed at the exposed portion at a preset spacing.

That is, the first acupressure plate 23 in contact with the reinforcement column unit 12 supports the reinforcement column unit 12 to prevent horizontal movement, and the second acupressure plate 24 is installed at a predetermined distance from the first acupressure plate 23. ) is integrated with the bridge 30, which will be described later.

Then, as shown in FIG. 4(e), the bridge 30 is constructed using the reinforcement column unit 12 and the saw nailing 21, and then grading work is performed as shown in FIG. 4(f). Thus, the bridge construction work is completed, and the structure in which the bridge 30 is integrated and installed in the exposed area of the saw nailing 21 will be described later.

Hereinafter, the installation process according to one type of the reinforcement column unit 12 and the sole nailing 21 will be described in more detail with reference to the attached drawings. For convenience, the description will be based only on the terrain on one side where the bridge is installed.

Figure 5 is a view showing a drilling hole formed, Figure 6 is a drawing showing a reinforcing column unit being installed in the drilling hole, and Figure 7 is a plan view showing the reinforcing column unit being arranged in a row.

The installation process of the reinforcement column unit first involves forming a drill hole (H) on the terrain, as shown in Figure 5 attached.

The drilling holes (H) are formed vertically from top to bottom, and a plurality of the drilling holes (H) are arranged adjacent to each other in parallel along the terrain surface on which the reinforcement column unit (12) is installed.

Next, as shown in the attached FIGS. 6 and 7, after inserting the H-beam 20 into the drill hole H, the grouting material 10 is integrated with the H-beam 20. It is injected into the perforation hole (H) so that it solidifies over time.

After a predetermined time has elapsed, after the grouting material 10 has condensed and hardened, a plurality of reinforcing column units 12 located on the front side that come into contact with the bridge to be built in the future are connected along the ground where the piers of the bridge are located. It is constructed in the form

Figures 8 to 10 are sequential views showing how nailing is installed in a top-down manner.

After the construction of the reinforcing column unit 12 is completed, as shown in the attached FIG. 8, a certain section A of the slope is cut in predetermined sections from the upper side to the lower side of the front side where the reinforcing column unit 12 is installed. You go through the steps.

Next, as shown in the attached FIG. 9, the steel nailing 21 having a predetermined length from the front side to the rear ground of the reinforcement column unit 12 is installed to strengthen the reinforcement column unit 12. (12) Take steps to ensure that it is more firmly fixed to the remaining ground.

The step of installing the soil nailing (21) is to first form a drilling hole (h) so that the reinforcement column unit (12) and the ground are simultaneously connected, and then install the soil nailing (21) in the drilling hole (h). After installing, a step of injecting and hardening the grouting material 22 into the drilled hole (h) around the soil nailing 21 is performed.

And, when the hardening of the grouting material 22 injected into the drilling hole h is completed, the reinforcing column unit 12 can be maintained completely fixed to the ground for a certain section.

Meanwhile, the end of the soil nailing 21 is exposed to the outside for a certain length, and at this time, the first acupressure plate 23 is attached to the exposed end of the soil nailing 21 to the reinforcement column unit 12. It is installed to support, and a second acupressure plate 24 is installed at the exposed end of the saw nailing 21 at a position spaced a predetermined length away from the first acupressure plate 23.

Next, the process of cutting the slope of the ground again for a predetermined section is performed. In addition, for each cut section, the process of installing the drilling hole (h), saw nailing (21), and injecting the grouting material (22) and installing the first acupressure plate (23) and the second acupressure plate (24) as described above. is performed repeatedly.

In this way, the work of fixing the reinforcing column unit 12 to the ground is completed by sequentially performing the cutting process of the slope and the installation step of the saw nailing 21 in a top-down manner. The drawing showing this is completed. Same as in Figure 10.

Then, as shown in the attached FIG. 11, the second acupressure plate 24 is installed on one end of the sole nailing 21 exposed to the front and outside of the reinforcement column unit 12. The step of constructing the abutment 32 is performed.

A predetermined base 31 may be constructed at the lower part of the abutment 32. Although not shown in detail, when constructing the abutment 32, the second acupressure plate 24 and the saw nailing 21 are connected to each other. Additional formwork and reinforcement may be provided to ensure support.

Finally, the construction of the bridge 30 is completed by constructing the piers 33 in a structure that connects the upper parts of the abutments 32 on both sides.

The bridge construction method according to an embodiment of the present invention as described above uses reinforcing column units and saw nailing to support the horizontal earth pressure of the terrain on both sides of the bridge, and the abutments of the bridge support only the vertical earth pressure. Accordingly, efficient structural safety can be achieved.

In addition, by allowing the abutments of the bridge to support only the vertical earth pressure, foundation construction work for piles as in existing bridges becomes unnecessary, thereby improving work efficiency.

In addition, by applying a double acupressure plate system, it is possible to sufficiently guarantee safety by bringing about the integrated behavior of saw nailing and bridge abutments.

In addition, among the dual acupressure plates, the first acupressure plate supports the reinforcing column unit to ensure safety during construction, and the second acupressure plate ensures structural safety by bringing about the integrated movement effect of saw nailing and abutment. .

Furthermore, since the bridge is constructed using reinforcing column units and saw nailing, the amount of foundation excavation is minimized, the construction process is simplified, and economical construction is possible.

Figure 12 is a perspective view showing an alternating connection unit installed in a reinforcement column unit according to another embodiment of the present invention, and Figure 13 is a perspective view showing an alternating connection unit being installed in a reinforcement column unit according to another embodiment of the present invention. It is a plan view shown, and Figure 14 is a side cross-sectional view showing an abutment to which an abutment connection unit according to another embodiment of the present invention is applied.

As shown in FIGS. 12 and 13, after forming a drilling hole (H) in the ground where the reinforcement column unit 12 will be installed, the H beam 20 is installed in the drilling hole (H).

The H beam 20 consists of a pair of horizontal beams 24 and a vertical beam 28 connecting the centers of the pair of horizontal beams 24, and the vertical beams 28 are spaced at preset intervals. Connection holes 29 are provided in a form that penetrates both sides of the vertical beam 28 (see Figure 15).

And, according to this embodiment, it further includes an alternating connection unit 50 installed at the upper end of the reinforcement column unit 12.

The alternating connection unit 50 is provided with a horizontal board part 52 in the form of a board having a predetermined thickness, and a vertical direction crossing the horizontal board part 52 on the lower side of the horizontal board part 52, and the H It is provided with an insertion board portion 54 that is press-fitted into the space 20a between a pair of horizontal beams 24 located on one side with respect to the vertical beam 28 of the beam 20.

As shown, the insertion board portion 54 is provided in pairs so as to be inserted into the space 20a between the horizontal beams 24 respectively installed inside the adjacent drilling holes H.

In addition, the insertion board part 54 is provided with a through hole 58, and a protruding locking part 56 is provided at the upper end of the horizontal board part 52.

This alternating connection unit 50 is installed so that the vertical board parts 54 are respectively inserted into the space 20a and at the same time the horizontal board parts 52 are arranged horizontally on the upper part of the reinforcement column unit 12. .

Next, when the grouting material is injected into the perforation hole (H), the injected grouting material (10) passes through the connection hole (29) and the through hole (58) into the perforation hole forming the reinforcement column unit (12). (H) It is completely filled to the top.

In addition, as described above, the abutment 32 of the bridge is constructed so that the second support plate 24 of the saw nailing 21 on the front side of the reinforcement column unit 12 is in an internally installed state, and at this time, the abutment 32 ) A base portion 31 of a predetermined size can be applied to the lower part.

Next, the plate-shaped alternating base portion 70 provided with a locking hole 72 through which the protruding locking portion 56 provided on the upper portion of the horizontal board portion 52 is caught is hung on the upper portion of the horizontal board portion 52. The protruding locking portion 56 is installed to penetrate the hole 72. At this time, the catching hole 72 may be formed in the form of a slit hole to have a predetermined margin.

Finally, the construction of the bridge 30 is completed by forming the piers 80 by pouring concrete or the like to connect the upper part of the original ground and the abutment foundation 70 installed on the upper part of the abutment part.

After applying such an alternating connection unit 50 to be integrated with the reinforcement column unit 12, the overall structural stability of the bridge can be greatly improved when constructing the bridge piers 80.

Meanwhile, although not shown in detail, a soft material coating portion that coats the outside of the vertical board portion 54 of the shift connection unit 50 to a predetermined thickness is applied to the load and vibration applied to the shift connection unit 50. The safety of the bridge may be improved by providing a buffering effect.

At this time, it is more preferable that the coating part is provided with a luminous material so that after injecting the grouting material, it can be determined whether the grouting material completely covers the outside of the coating part as a whole.

Figure 16 is a side cross-sectional view showing a bridge to which a shift connecting unit is applied according to another embodiment of the present invention, and Figure 17 is a perspective view showing an indicating rod applied to Figure 16.

In the case of this embodiment, the same shift connection unit 50 as the above-described embodiment is applied, but an indicator rod is installed horizontally on the pier with one end supported by the vertical rod portion 54 of the shift connection unit 50. (98) applies.

That is, the indicator rod 98 is installed so that one end is supported on one side of the vertical rod part 54 and the other end is horizontally disposed on the exposed vertical surface of the pier 32 to be built.

In addition, different first color parts 96 and second color parts 97 are applied to the outer surface of the indicator rod 98 along the longitudinal direction.

Accordingly, as time passes, when the abutment connecting unit 50 moves horizontally to the pier 80, the indicating rod 98 can be exposed to the outside of the abutment 32.

In addition, when the first color part 96 is exposed, it is possible to instruct an external manager to instruct structural safety to take timely measures to ensure the safety of the bridge.

Meanwhile, in each of the above embodiments, anchor reinforcement work according to a known form can be applied in parallel to the soil nailing reinforcement work on the terrain where the bridge is constructed.

Those skilled in the art to which the above-described present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the above-described embodiments should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the claims described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and the equivalent concept should be construed as being included in the scope of the present invention.

12: Reinforcement column unit
21: Soil nailing
23, 24: Acupressure plate
30: bridge

Claims (3)

ground investigation stage;
Installing reinforcing column units in an up and down vertical direction on both sides spaced apart from each other by a predetermined distance;
Performing foundation digging work on the front side of the reinforcing column unit and soil nailing reinforcement work in a manner that penetrates the terrain and the reinforcing column unit;
Constructing an abutment in a form connected to the reinforcement column unit and the saw nailing; and
Building a pier connecting the upper part of the abutment;
Bridge construction method using reinforcing column units and saw nailing. According to paragraph 1,
The saw nailing is installed with a preset length exposed to the outside of the reinforcement column unit,
Further comprising the step of installing a pair of acupressure plates in a spaced apart form on the front end of the exposed sole nail,
Bridge construction method using reinforcing column units and saw nailing. According to paragraph 1,
The step of excavating the foundation on the front side of the reinforcement column unit and performing saw nailing reinforcement work in a manner that penetrates the terrain and the reinforcement column unit,
In a top-down manner, soil nailing reinforcement work is repeatedly performed by excavating the foundation from the top and penetrating the terrain and reinforcing column units.
Bridge construction method using reinforcing column units and saw nailing.

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