KR100664705B1 - The block for the river bed protection, and the construction method of this - Google Patents

Abstract

The present invention is to manufacture and install a block that can protect the riverbed to prevent the weakening of the ground supporting the alternating or pier to increase the shear force of the river bottom, and to ensure a stable state in the water flow and The purpose is to provide a construction method thereof.

Bottom protection block according to the present invention for achieving the above object is made of a rectangular block as a whole, and front and rear projections formed integrally horizontally protruding forward and backward at a predetermined thickness and height from the front and rear surfaces of the block; ; Left and right side protrusions which protrude horizontally integrally in left and right directions at predetermined thicknesses and widths at both ends of left and right sides of the block; A vegetation space portion having a predetermined cross-sectional shape and a central portion of the block penetrating up and down; Upper and lower protrusions which protrude vertically integrally upward and at a predetermined thickness and height from front, rear, left and right of the vegetation space of the block; The lower surface of the block is composed of a lower surface groove formed in the recess in a predetermined depth and width so that the upper projection is inserted into the center, it is characterized in that the blocks are coupled to the upper, front, rear, left and right to engage.

In addition, the block construction method for protecting the bed according to the present invention for achieving the above object is to uniformly select and arrange a predetermined position of the bed; Installing the block of claim 1 on the lower, horizontally or layered by interlocking engagement between the blocks in the up, down, left and right; Characterized in that it consists of a step of chopping the upper surface of the installed block.

Riverbed, protection, block

Description

The block for the river bed protection, and the construction method of this}

1 is a front perspective view showing a block for protecting a bed according to the present invention;

Figure 2 is a front view showing a block for protecting the bed according to the invention,

Figure 3 is a rear perspective view showing a block for protecting the bed according to the invention,

4 is a plan view illustrating a block for protecting a bed according to the present invention;

Figure 5 is a side view showing a block for protecting the bed according to the invention,

Figure 6 is an exploded perspective view showing a block for protecting the bed according to the invention.

Explanation of symbols on the main parts of the drawing

110: front protrusion 120: rear protrusion

210: left side protrusion 220: right side protrusion

310: vegetation space portion 410: upper projection

412: slope 420: lower surface groove

500: connector 510: connector

610: through hole B: block

R: riverbed

The present invention relates to a bed protection block and a construction method thereof, and in particular, to prevent the weakening of the ground supporting the shift or the pier to install a block that can protect the bed bed to protect the bed bed to stabilize the bed And it relates to a construction method thereof.

In general, natural rivers and artificial waterways are eroded or scoured due to the influence of water flow, and rivers are exposed to local, longitudinal and erosion at the point where the cross section of the structure changes rapidly and the river material changes. Degradation of riverbeds The destruction of hand structures and the loss of riverbed materials can occur, so riverbed protection holes for longitudinal and erosion prevention are required in river sections where the flow velocity or flow rate exceeds the maximum allowable value.

Here, the above-mentioned river bed protection hole is a stone material, gabion concrete crushed stone, precast concrete retaining wall and the like in a variety of materials and forms, the most common material for river bed protection is administered to the sand stone.

In particular, the sandstone and gabion is the most widely used because of the relatively low initial cost and good construction, but there is a limit to the resistance to flow, there are problems of maintenance, deposition of flood debris, artificial loss and destruction .

Accordingly, the present invention has been made to solve the problems described above, to prevent the weakening of the ground supporting the alternating or pier to manufacture and install a block that can protect the riverbed shear force of the river floor It is an object of the present invention to provide a block for protecting a bed and a construction method thereof to increase the flow stability and to stabilize the flow.

Bottom protection block according to the present invention for achieving the above object is made of a rectangular block as a whole, and front and rear projections formed integrally horizontally protruding forward and backward at a predetermined thickness and height from the front and rear surfaces of the block; ; Left and right side protrusions which protrude horizontally integrally in left and right directions at predetermined thicknesses and widths at both ends of left and right sides of the block; A vegetation space portion having a predetermined cross-sectional shape and a central portion of the block penetrating up and down; Upper and lower protrusions which protrude vertically integrally upward and at a predetermined thickness and height from front, rear, left and right of the vegetation space of the block; The lower surface of the block is composed of a lower surface groove formed in the recess in a predetermined depth and width so that the upper projection is inserted into the center, it is characterized in that the blocks are coupled to the upper, front, rear, left and right to engage.

In addition, the block construction method for protecting the bed according to the present invention for achieving the above object is to uniformly select and arrange a predetermined position of the bed; Installing the block of claim 1 on the lower, horizontally or layered by interlocking engagement between the blocks in the up, down, left and right; Characterized in that it consists of a step of chopping the upper surface of the installed block.

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

1 is a front perspective view showing a block for protecting the bed according to the present invention, Figure 2 is a front view showing a block for protecting the bed according to the present invention, Figure 3 is a rear perspective view showing a block for protecting the bed according to the invention, Figure 4 is a plan view showing a bed protection block according to the present invention, Figure 5 is a side view showing a block for bed protection according to the present invention, Figure 6 is an exploded perspective view showing the bed protection block according to the present invention.

As shown in these figures, the bed protection block according to the present invention is composed of a block (B) of a rectangular shape as a whole, horizontally integrally horizontally in front and rear at a predetermined thickness and height on the front and rear surfaces of the block (B). Front and rear protrusions 110 and 120 protruding from each other; Left and right side protrusions 210 and 220 protruding integrally and horizontally in left and right directions at predetermined thicknesses and widths at both ends of the left and right sides of the block B; A vegetation space 310 having a predetermined cross-sectional shape and a central portion of the block B penetrating up and down; An upper surface protrusion 410 formed to protrude vertically integrally upwardly at a predetermined thickness and height in front, rear, left, and right sides of the vegetation space portion 310 of the block B; The lower surface of the block (B) is composed of a lower groove 420 formed in the recess in the predetermined depth and width so that the upper surface projecting portion 410 is inserted in the middle, the blocks (B) are engaged with each other up, down, front, rear, left and right. It is configured to be.

Here, the front and rear projections 110 and 120 have a structure in which the front projection 110 and the rear projection 120 formed on the front surface of the block B are positioned on the same horizontal line and have the same size.

In addition, the left and right side protrusions 210 and 220 are provided with two left side protrusions 210 having a constant width among both ends of the left side, and the left side protrusions on the same horizontal line as the left side protrusion 210 on the right side. The same size as that of 210 is a structure in which two right side protrusions 220 are formed.

In addition, the upper protrusion 410 is formed to protrude on the upper surface of the block (B) in the shape of a cone, triangular pyramid, polygonal pyramid, truncated cone, triangular pyramid, polygonal truncated cone, cylinder, triangular prism, polygonal pillar, the upper projection ( When the recess 420 is inserted into the recess 420, the recess 420 is recessed when the recess 420 is inserted into the same shape as the shape of the upper protrusion 410 from the lower surface of the block B so that the upper protrusion 410 is inserted. Structure.

In addition, the upper protrusion 410 is formed with an inclined surface 412 as the width becomes wider from the top to the lower end at a predetermined angle, the lower groove 420 is inserted into the upper protrusion 410 is the upper protrusion 410 It is a structure formed in the same shape as).

In particular, the top protrusion 410 is composed of four.

This is for easily stacking the lower surface recess 420 of the upper end on the upper protrusion 410 installed at the lower end when the block B is installed.

In addition, the left and right side protrusions 210 and 220 have a structure in which a connection part 500 in which a connection hole 510 is formed to connect the unit blocks B is integrally formed.

In addition, the vegetation space portion 310 is a structure formed in the cross-sectional shape of any one of cross-shaped, circular, square, triangle.

In addition, the periphery of the vegetation space portion 310 has a structure in which a through hole 610 penetrating the top and bottom of the block (B) is formed.

That is, the river protection block according to the present invention is the front and rear projections 110 and 120, the left and right projections 210 and 220, the vegetation space portion 310, the upper projection 410 and the lower groove 420 integrally. As a unit block (B) formed, a plurality of unit blocks (B) are vertically and horizontally stacked on the bottom to construct an integrated block mat.

Here, the river protection block (B) is to increase its own weight and flexibility, durability that can withstand water flow resistance, and also should be constructed so that the blocks (B) to bite each other as a whole integral, block (B) The unit volume weight of) should be selected in consideration of the seismic characteristics, hydraulic characteristics, length and safety of activity, and the correlation between the unit volume weight of block (B) and the flow rate, surface gradient, water flow force and bed material Basically refer to cases.

1) Concrete block weight by flow rate

 division  Average flow velocity in section at high water flow (m / s)  Less than 2  2 to less than 4  4  Deformed Concrete Block Weight (ton)  0.5 to 2  1 to 4  2

2) flow rate and block weight

 Sectional Average Flow Rate (m / s)  Block weight (ton)  Less than 2 2-3 3-4 4-5 5 or more  0.5-2 0.5-2 2-3 3 4 or more

3) Sleep gradient and block weight

Sleep gradient Block weight (ton)  Less than 1/2000 1/2000 to 1/1000 1/1000 to 1/500 1/500 to 1/300 1/300 or more  0.5-2 0.5-2 2-3 3 3 or more

4) Crushing force (surface gradient × depth) and block weight

Breaking force (l × h) × 10 ^-2 Block weight (ton)  Less than 0.5 0.5 to 1.0 1.0 to 2.0 2.0 to 3.0 3.0 or more  0.5-2 0.5-2 2-3 3 3 or more

5) bed material and block weight

Average particle diameter by bed slope (mm) Block weight (ton)  2 2-30 30-100 100 or more  0.5 to 2 0.5 to 2 2 to 3 3

As described above, the block for river protection according to the present invention is a block (B) in the form of interlocking blocks (B), showing the most efficient and economical block (B) shape, and the installation and construction is simple.

In addition, there is safety in water flow after the installation of the block (B), land construction is possible, and the foundation ground can be excavated and refilled evenly.

Block for protecting the bed according to the present invention (B) is produced by examining in accordance with the following detailed structural review and various conditions.

That is, the shape and shape of the block (B) is produced based on the calculation of the stable state and the required weight as a result of various structural reviews.

Analysis of the river protection block according to the present invention through the structural review

1) Safety review of activities

R> F

Where R is the resistance (t)

              F: flow power (t)

              W: Required weight of the block (t)

C _D : Resistance coefficient (C _D ≒ 1.0)

r _w : unit volume weight of running water (r _w = 1.0t / ㎥)

r _c : unit volume weight of the block (r _c = 2.3t / ㎥)

              ε: shielding coefficient

              s: transparent area (㎡)

              v: mean flow velocity of flow area (m / sec)

g: acceleration of gravity (g = 9.8m / sec ² )

2) Review of stability against conduction

Where X, Y is the length of the moment arm (m)

In general, for blocks, X> Y

The required weight of the block is therefore estimated in the safety review of the activity.

3) Calculation of water and resistance

The flow rate calculation is based on the average flow rate formula of Mainning.

Mainning Formula

Where V is mean flow velocity of the surface

              R: Min (m) (R = effective area (A) / wheel width (P) when the lower width is R ≒ h

              I: Sleep slope (bottom slope)

              Q: Flow rate (㎥ / sec)

              B: Lower width (m)

              n: Zoning coefficient of mainning (based on river facilities)

The hydraulic power is calculated by the following equation.

Where F is the hydraulic power (t)

C _D : Resistance coefficient (C _D ≒ 1.0)

r _w : unit volume of running water (r _w = 1.0t / ㎡)

             ε: Shielding coefficient (ε = 1.0 for 1 case, ε ≒ 0.35 ~ 0.40 for multiple case)

              v: flow rate (m / sec)

g: acceleration of gravity (g = 9.8m / sec ² )

s: transparent area (㎡)

The transparent area s in the shape and flow direction of the block is calculated as in the figure below.

Resistance is calculated by the following equation.

Where R: resistivity (t)

              μ: coefficient of friction (μ ≒ 0.8)

r _c : unit volume weight of the block (r _c = 2.3t / ㎡)

               v: block volume (㎥)

               w: weight in air of the block (t)

Analysis by real modeling

1) When using a block as a hybrid mound covering

1. Design condition

Front digging: H = 6m

Period: T = 10.8sec

Mound Front Depth: h = 10m

Depth at Mound: d = 5.5m

Mound Width: B = 7.0m

2. Calculation

wavelength at h = 10m L = 100.7m

Thus the safe weight of the block is

Can be installed according to various shapes and conditions

A) Use of sloped cladding

B) use of river banks;

C) use of deep-sea revetment

Shape change of phase immediately after construction

1) Immediately after construction

There is no change in block B.

2) Change in flow rate increase

Flexural action by self weight of tip and tail scour prevention block (B)

3) Flow rate reduction

Stabilization of aggregate inflow between sediment blocks (B) such as aggregates at the tip and tail due to reduced flow

Hereinafter, the construction of the bed protection block according to the present invention having the configuration as described above will be described.

Block construction method for protecting the bed according to the present invention comprises the steps of selecting and arranging a predetermined position of the bed (R) constantly; Installing the block (B) of claim 1 in the lower phase (R), the step (B) horizontally or layered by the engagement coupling between the blocks (B) up, down, left and right; The step of compacting the upper surface of the installed block (B) is sequentially carried out, characterized in that the construction of a block for protecting the bed on the bed.

In addition, after the chopped the upper surface of the block (B) is added to the soil filling in the vegetation space portion 310.

As described above, the block for protecting the bed according to the present invention and a construction method thereof have the following effects.

First, the present invention is a member that can be used reliably even in a channel in which a high flow rate is produced by manufacturing and installing a block of uniform material and shape at a relatively low cost.

Secondly, the present invention is a block of the block-type bit, the most efficient, economical block shape, and installation and construction is simple.

Third, the present invention has excellent resistance to water flow after block construction on the bed, easy maintenance, and no problems of erosion, artificial loss and destruction of flood debris.

Fourth, the present invention is safe in water flow after the construction of the block on the riverbed, it is possible to land construction, and evenly excavated and backfill the foundation ground can be installed.

Fifth, the present invention has a large stabilizing effect on the waterway when penetrating the sandstone, it is an environmentally friendly method that allows plants and vegetation between blocks.

Claims (11)

A front and rear projections 110 and 120 which are formed as a block B as a whole and protrude horizontally integrally with the front and rear with a predetermined thickness and height from the front and rear surfaces of the block B; Left and right side protrusions 210 and 220 protruding integrally and horizontally in left and right directions at predetermined thicknesses and widths at both ends of the left and right sides of the block B; A vegetation space 310 having a predetermined cross-sectional shape and a central portion of the block B penetrating up and down; An upper surface protrusion 410 formed to protrude vertically integrally upwardly at a predetermined thickness and height in front, rear, left, and right sides of the vegetation space portion 310 of the block B; In the middle of the lower surface of the block (B) is composed of a lower groove recess 420 formed in the recess to the inner side with a predetermined depth and width so that the upper projection 410 is inserted, Block (B) for protecting the bed, characterized in that configured to be coupled to each other up, down, front, rear, left and right. The method of claim 1, The front and rear projections (110, 120) is a block for protecting the riverbed, characterized in that the front projections 110 and the rear projections (120) formed on the front of the block (B) is located on the same horizontal line and formed in the same size at the same time. The method of claim 1, The left and right side protrusions 210 and 220 are provided with two left side protrusions 210 having a predetermined width at both ends of the left side, and a left side protrusion 210 on the same horizontal line as the left side protrusion 210 on the right side. Lower protection block, characterized in that the two right side protrusions 220 are formed in the same size. The method of claim 1, The upper protrusion 410 is formed to protrude on the upper surface of the block (B) in the shape of any one of a cone, a triangular pyramid, a polygonal pyramid, a truncated cone, a triangular pyramid, a polygonal truncated cone, a cylinder, a triangular prism, a polygonal pillar, and the upper projection 410 If the groove 420 is inserted into the groove 420 is formed in the same shape as the shape of the top protrusion 410 from the bottom of the block (B) to the inside so that the top protrusion 410 is inserted. Block for bed protection. The method according to claim 1 or 3, Blocks for protecting the bed, characterized in that the left and right side protrusions (210, 220) is formed integrally with a connection portion 500 is formed with a connection hole (510) for connecting between each unit block (B). The method according to claim 1 or 4, The upper surface protrusion 410 is formed with an inclined surface 412 is wider from the upper end to the lower end at a predetermined angle, The lower groove recess 420 into which the upper protrusion 410 is inserted is formed in the same shape as the upper protrusion 410. The method according to any one of claims 1, 4 and 6, The upper protrusion 410 is a block for protecting the river, characterized in that consisting of four. The method of claim 1, The vegetation space portion 310 is a block for river bed protection, characterized in that consisting of a cross-sectional shape of any one of a cross, circle, square, triangle. The method according to claim 1 or 8, Block for protecting the bed, characterized in that the periphery of the vegetation space portion 310 is formed with a through hole 610 penetrating the top and bottom of the block (B). Selecting and arranging a predetermined position of the lower bed R constantly; Installing the block (B) of claim 1 in the lower phase (R), the step (B) horizontally or layered by the engagement coupling between the blocks (B) up, down, left and right; Block construction method for protecting the lower phase, characterized in that the step consisting of chopping the upper surface of the installed block (B). The method of claim 10, Block construction method for protecting the bed, characterized in that the addition of the step of filling the earth and sand in the vegetation space portion 310 after chopping the upper surface of the block (B).

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