KR100491444B1 - Buttress steel erosion control dam - Google Patents

Abstract

The present invention is installed in the upstream of the river to block the driftwood and rock drifts drifted by heavy rain or flood, the four-sided dam, but a plurality of pillars arranged in the width direction of the river and inclined downstream; A beam having an empty space that is installed on the upper inclined surface of the pillar in a vertical direction to connect the pillar to the pillar and absorb shock therein; A support shaft erected at a distance behind the pillar and inclined toward the pillar to support the pillar; And an auxiliary shaft installed on the rear surface of the pillar in a vertical direction in the direction of the buttress shaft to connect the buttress shaft and the pillar so that the coupling between the pillar and the buttress shaft is stably maintained. This steel four-sided dam is easy to assemble and install, and the impact on driftwood and rocks is first absorbed by a beam formed with an empty space, thereby protecting the pillar that is difficult to replace.

Description

BUTTRESS STEEL EROSION CONTROL DAM}

The present invention relates to a four-sided dam installed in the upstream of the river, and more particularly to a four-sided dam in the butrus steel dam to minimize the damage of the dam by the floating rock and driftwood.

In general, four-sided dams are installed upstream of a valley where there is a risk of landslides, or rivers where driftwood and rocks are severely prevented. 1, 2 and 3 show an example of four-sided dam, showing a four-sided dam made of steel. This four-sided dam is composed of pillars 110 and beams 120. The pillar 110 is inclined in the downstream direction and is supported by the support shaft 130. An auxiliary shaft 140 is separately installed between the bracing shaft 130 and the pillar 110 to firmly fix the bracing shaft 130 to the pillar 110. The beam 120 is installed perpendicular to the pillar 110 so that the waste material descending from the upstream is no longer moved downstream. As the pillars 110 and beams 120 of the four-side dams, generally H-beams and L-beams are used. Beams 120 are coupled to both sides of the H-shaped steel, which is the pillar 110, through the bolt 300 as shown in FIG. 3.

The four-sided dam configured in this way is simple in structure and easy to install. However, since the impact due to the collision with the waste material is transmitted to the pillar 110 and the beam 120 together, not only the beam 120 that is relatively easy to replace, but also the pillar 110 that is difficult to replace is damaged. Therefore, there is a problem that the post-maintenance is difficult and the maintenance cost accordingly takes a lot.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a buttress steel four-way dam configured so that the impact of the beam is less transmitted to the pillar, and the replacement of the beam that is frequently impacted.

According to an aspect of the present invention, a steel four-side dam installed upstream of the river to block driftwood and rocks floating by heavy rain or flood, comprising: a plurality of pillars arranged in the width direction of the river and inclined downstream; A beam having an empty space that is installed on the upper inclined surface of the pillar in a vertical direction to connect the pillar to the pillar and absorb shock therein; A support shaft erected at a distance behind the pillar and inclined toward the pillar to support the pillar; And a buttress steel four-way dam installed on the rear surface of the pillar in a direction perpendicular to the buttress shaft, including a secondary shaft connecting the buttress shaft and the pillar so that the coupling between the pillar and the buttress shaft is stably maintained.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 shows a front view of the four-sided dam in accordance with an embodiment of the present invention, Figure 5 shows a side view of the four-sided dam shown in Figure 4, Figure 6 shows the coupled state of the pillar and beam of the four-sided dam shown in Figure 4 It is shown.

Four-sided dam 200 is installed in the form of crossing the water upstream of the river. On the left and right sides of the four dams 200, a support wall 400 made of concrete is made. The support wall 400 causes the driftwood and the rock to drift on the water flow to the beams of the four sides dam 100 and guides the water to pass downstream.

Four-sided dam 200 is composed of a beam 220 for blocking the flow of driftwood or rock and a pillar 210 for supporting the beam 220. The pillar 210 is inclined in the downstream direction, and the beam 220 is coupled to the upper inclined surface of the pillar 210 as shown in FIG. 5. The length of the beam 220 is equal to the distance between the pillars 210 and the pillars 210 installed at the left and right ends of the four dams 200. Usually, the beam 220 is very heavy as a steel pipe material so that it is transported and moved using a crane rather than an attraction force. Therefore, when the length of the beam 220 is increased in this way, the use frequency of the crane is reduced than when the length of the beam 220 is short, so that the installation work can be performed quickly.

On the other hand, if the beam 220 is long, it is difficult to fasten the bolt 210 and the pillars erected in the middle. In this embodiment, in consideration of this point, a rectangular opening 221 is formed at a predetermined interval on the bottom surface of the beam 220 so that an operator can easily perform the bolt 300 fastening operation. The interval at which the openings 221 are formed is equal to the distance between the pillars 210. The size of the opening 221 is sufficient to allow entry and exit of a bolting tool such as a worker's hand or spanner. Therefore, the formation of the openings 221 does not significantly affect the strength and life of the beam 220.

The inclination of the pillar 210 with the ground is usually determined between 45 ° and 90 °. In this embodiment, the inclination of the pillar 210 is 70 °. The support shaft 230 is coupled to the inclined surface of the pillar 210. The support shaft 230 supports the pillar 210 so that the pillar 210 is not inclined more than a predetermined angle. As such, the pillar 210 is tilted without standing vertically from the ground and supported by the support shaft 230 in order to prevent the pillar 210 from collapsing in the direction of water current due to the collision with the waste materials coming off the water. The support shaft 230 is preferably coupled to the upper side (approximately 2/3 or more of the column height) of the pillar 210 so as to support the inclined pillar 210 well. In addition, the inclination angle of the support shaft 230 and the ground to support the pillar 210 is preferably acute angle. At this time, the support shaft 230 may support the pillar 210 vertically, but if the vertical coupling while supporting the upper portion of the pillar 210 vertically, the support shaft 230 is longer than the pillar 210, thereby causing material consumption. Since there are many, it is preferable that it is larger than 45 degrees. In this embodiment, the inclination of the support shaft 230 is 60 °, and the width between the pillar 210 and the support shaft 230 fixed to the ground is limited to about 65% of the length of the pillar 210.

The auxiliary shaft 240 is coupled between the support shaft 230 and the pillar 210 to help the support shaft 230 support the pillar 210 more effectively. The auxiliary shaft 240 extends vertically from the pillar 210 and is connected to the support shaft 230 and is fixedly coupled through the bolt. As such, when the auxiliary shaft 240 is vertically coupled at the pillar 210 and connected to the bracing shaft 230, the impact of the pillar 210 is well transmitted to the bracing shaft 230. Meanwhile, in the related art, the auxiliary shaft 240 is installed horizontally with the ground and is obliquely coupled to the pillar 210. Therefore, the bolt fastening portion of the auxiliary shaft 240 and the lifter 210 is loosened by frequent external force. However, in the present invention, since the auxiliary shaft 240 supports the pillar 210 vertically, there is an advantage that the bolt fastening state is not loosened even by repeated shocks.

Pillar 210 and beam 220 is made of H-shaped steel and square steel pipe, respectively. The beam 220 is coupled to the front of the pillar 210 via the bolt 300 as shown in FIG. At this time, since the beam 220 is a hollow steel tube inside, it can absorb a considerable portion of the impact due to the collision. In addition, since the beam 220 is coupled to the front surface (upstream direction) of the pillar 210 through the bolt 300, assembly and disassembly are easy. Therefore, the driftwood or rock drifts upstream does not directly hit the pillar 210, and the impact due to the collision is absorbed in the beam 220 first, so that the pillar 210 is not damaged.

The table below shows the stresses acting on the column, the support shaft and the secondary shaft.The joint angle between the column, the support shaft and the secondary shaft after equalizing the length of the column (400mm) and the ground fixing position of the support shaft (260mm from the pillar) Experimental by changing the.

As can be seen in Table 1 above, the stress acting on the column and the support shaft has the smallest value in Measurement Example 1, and the numerical value of the present invention is the smallest in the auxiliary axis and other items. In the case of Measurement Example 1, however, the stress acting on the pillar is concentrated at the portion connected to the support shaft. Therefore, it is evaluated that the structure like the present invention is safer and superior in practical application to all four dams.

Figure 7 shows a front view of the four-sided dam in accordance with another embodiment of the present invention, Figure 8 shows the coupled state of the pillars and beams of the four-sided dam shown in FIG.

In the present embodiment, the length of the beam 220 is different from the previous embodiment, the length of the beam 220 installed on the pillar 210 is equal to the distance between the pillar 210 and the pillar 210. The length of the beam 220 to be equal to the distance between the pillars 210 is considered in consideration of the convenience of the transport and installation work is suitable for a wide width of the river or when the transport of the beam 220 is not easy. On the other hand, even when the length of the beam 220 is the same as the installation interval of the pillar 210 in this way, the opening on the bottom of the beam 220 to facilitate fastening of the bolt 300 of the beam 220 and the pillar 210. It is good to form 221.

According to the present invention as described through the embodiment, since the beam primarily absorbs the impact due to the impact of the waste material, there is an advantage that the damage of the column occurs less and the replacement of the beam is simple and easy maintenance of the four-side dam.

The technical idea of the butrus steel four-way dam in the above was described with the accompanying drawings, but this is only illustrative of the best embodiments of the present invention and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

1 shows a front view of a conventional four-sided dam,

Figure 2 shows a side view of the four-sided dam shown in Figure 1,

Figure 3 shows the coupled state of the pillar and beam of the four-side dam shown in Figure 1,

Figure 4 shows a front view of the four-sided dam in accordance with an embodiment of the present invention,

Figure 5 shows a side view of the four-sided dam shown in Figure 4,

FIG. 6 illustrates a coupling state between the pillar and the beam of the four-side dam shown in FIG. 4,

Figure 7 shows a front view of the four-sided dam in accordance with another embodiment of the present invention,

FIG. 8 illustrates a coupling state between the pillar and the beam of the four-side dam shown in FIG. 7.

<Description of the code for the main part of the drawing>

210: pillar 220: beam

230: bracing shaft 240: auxiliary shaft

300: Bolt

Claims (3)

It is installed on the upstream of the river and blocks all the driftwood and rocks floating by heavy rain or flood. A plurality of columns arranged in the width direction of the river and inclined at an angle of 70 degrees from the ground in the downstream direction, Beams provided with an empty space that is installed in the vertical direction on the upper inclined surface of the pillar to connect the pillar and the pillar and absorb the shock therein, A prop shaft erected at a distance behind the pillar and inclined toward the pillar to support the pillar, and Buttrus steel four-sided dam is installed on the back of the pillar in the vertical direction in the direction of the brace including a secondary shaft connecting the brace and the pillar so that the coupling of the pillar and the brace is stable. The buttress steel four-way dam according to claim 1, wherein the beam is a square steel pipe. The buttress steel four-side dam of claim 2, wherein openings are formed at regular intervals so that bolting with the column can be easily performed.