CN205776083U - A kind of chain the guarding wave slope protection prefabricated section system - Google Patents

Abstract

The utility model discloses a prefabricated block system for interlocking anti-wave slope protection, which includes laying I-shaped prefabricated slope protection blocks I (1) on the anti-wave slope protection (3) with a slope of less than 1:2; it is characterized in that: The prefabricated slope protection block I (1) includes a flange (1.1), a web (1.2), a groove segment (1.3), a flange slope (1.4), and a chamfer (1.5); the flange (1.1 ) is located at the upper and lower ends of the prefabricated slope protection block I (1), the web (1.2) is located in the middle of the prefabricated slope protection block I (1), and the flange slope (1.4) is located at the The above-mentioned transition section between the flange (1.1) and the web (1.2); it overcomes the disadvantages that the prefabricated blocks in the prior art are generally formed by manual casting of molds, and large gaps tend to appear between the prefabricated blocks after laying , it has the advantages that the small-sized blocks are interlocked with each other, and the damage of a single block will not cause other blocks to slide, which is convenient for the maintenance and replacement of the slope protection structure.

Description

A prefabricated block system for interlocking anti-wave and slope protection

technical field

The utility model belongs to the technical field of water conservancy and hydropower engineering such as dams and dikes, and more specifically relates to a prefabricated block system for chain wave prevention and slope protection.

Background technique

More than 95% of the more than 90,000 reservoir dams in my country are earth-rock dams. Effective protective measures must be taken for the upstream slope of the earth-rock dams to be washed by waves. In addition, the embankment project also faces the problem of slope protection.

The slope protection forms commonly used for the above projects include: cast-in-situ concrete slope protection, concrete prefabricated block slope protection, mortar stone slope protection and dry stone slope protection. Cast-in-situ concrete slope protection and mortar masonry slope protection have poor ability to adapt to the deformation of the dam body, and are prone to problems such as cracking and dislocation damage; dry stone slope protection is mainly constructed manually, which is labor-intensive, construction speed is slow, and operation Block stones are easy to weather for many years, and the overall aesthetics are poor; concrete prefabricated block slope protection has a strong ability to adapt to the deformation of the dam body, and it is more beautiful after laying, and has become more popular in recent years.

For slope protection with prefabricated concrete blocks, the construction difficulty and engineering quality are often greatly affected by the weight of a single prefabricated block for slope protection. For conventional hexagonal prefabricated blocks, because of their short size along the water flow direction, in order to meet the requirements of wave erosion, the thickness of a single block is often large, which affects project investment, and their mutual bite force is also poor, and prefabricated blocks are generally poured manually using molds After laying, large gaps are likely to appear between the prefabricated blocks, which will affect the overall effect.

Contents of the invention

The purpose of the utility model is to overcome the disadvantages of the above-mentioned background technology, and propose a prefabricated block system for interlocking anti-wave and slope protection.

The utility model is a prefabricated block system for interlocking anti-wave and slope protection, which includes laying I-shaped prefabricated slope protection blocks I on the anti-wave and slope protection slope with a gradient of less than 1:2;

It is characterized in that: the prefabricated slope protection block I includes flanges, webs, groove sections, flange slopes, and chamfers; the flanges are located at the upper and lower ends of the prefabricated slope protection blocks I, and the Web is positioned at the middle of described prefabricated slope protection block 1, and described flange slope is positioned at the transition section between described flange and web; Chamfering; the flange slopes at both ends and the side of the web form a groove segment.

In the above technical solution: the length of the web is twice the length of the flange.

In the above technical solution: the prefabricated slope protection blocks I are tiled end to end on the described wave protection slope, and among the left and right adjacent prefabricated slope protection blocks I, two prefabricated slope protection blocks I on one side The flange of the upper end and the lower end is stuck on the groove section in the described prefabricated slope protection block 1 on the other side.

In the above technical scheme: the length of the prefabricated slope protection block 1 is 80 cm, the width is 30 cm, and the height is 20 cm; the length of the flange is 16 cm, and the inclined plane of the flange is 8 cm; the web is 32 cm. cm.

In the above technical solution: when the slope is greater than 1:2, the lower surface of the prefabricated slope protection block I is provided with a groove segment area, and the groove segment area includes The web groove section and the flange groove section excavated along the back of the flange at both ends and extending to the flange slope.

In the above technical scheme: the excavation depth of the groove section area is no more than 1/2 of the height of the prefabricated slope protection block I; the web groove section and the web length , the same width; the excavation starting point A of the flange groove section is greater than 1/2 of the flange length.

The utility model has the following technical advantages: 1. In view of the fact that the upstream dam slope of the earth-rock dam is greatly affected by wind and wave erosion, the laying direction of the web of the prefabricated block is parallel to the direction of water flow. Since the length of the web direction of the prefabricated block is much greater than the width, It can make full use of its shape characteristics, reduce the thickness of slope protection required for calculation of wind and wave erosion, and save engineering investment; at the same time, the weight of a single prefabricated block is reduced, which reduces the difficulty of construction.

2. The utility model is provided with two different forms of I-shaped slope protection blocks for different slopes of the slope, which has strong practicability and wide application range.

3. The utility model adopts the flexible connection method of spatial interlocking, which enhances the overall stability of the slope protection structure, and can effectively resist external force damage such as dam settlement deformation, frost heaving, wave erosion, and earthquakes.

4. The structure of the utility model is relatively simple, and the on-site pressing of the machine is adopted, which not only has high work efficiency, but also can speed up the construction progress, and the prefabricated blocks pressed by the machine are of the same size, and the quality of the blocks is good.

5. The utility model uses small-sized blocks to interlock with each other, and the damage of a single block will not cause other blocks to slide, which is convenient for the maintenance and replacement of the slope protection structure.

Description of drawings

Figure 1 is a schematic structural diagram of a prefabricated slope protection block when the slope is less than 1:2.

Figure 2 is a schematic structural view of a prefabricated slope protection block when the slope is greater than 1:2.

Fig. 3 is a schematic side view of the structure of the prefabricated slope protection block.

Figure 4 is a side view of the prefabricated slope protection block when the slope is greater than 1:2.

Figure 5 is a rear view of the prefabricated slope protection block when the slope is greater than 1:2.

Fig. 6 is a schematic diagram of a mold of a prefabricated slope protection block.

Fig. 7 is a structural schematic diagram of an existing prefabricated slope protection block.

Fig. 8 is a schematic diagram of the installation structure of the prefabricated slope protection block in slope protection.

FIG. 9 is a schematic diagram of a specific structure at point B in FIG. 8 .

In the figure: prefabricated slope protection block I1, flange 1.1, flange groove section 1.1.1, web 1.2, web groove section 1.2.1, groove section 1.3, flange slope 1.4, chamfer 1.5, groove Segment area 2, anti-wave slope protection 3.

detailed description

The implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation of the present utility model, they are only examples, and the advantages of the present utility model will become clearer and easier to understand.

Referring to Fig. 1-8, the utility model is a chain anti-wave and slope protection prefabricated block system, which includes laying I-shaped prefabricated slope protection blocks I1 on the anti-wave and slope protection 3 with a slope less than 1:2; it is characterized in that : the prefabricated slope protection block I1 includes a flange 1.1, a web 1.2, a groove section 1.3, a flange slope 1.4, and a chamfer 1.5; the flange 1.1 is located at the upper and lower ends of the prefabricated slope protection block I1, The web 1.2 is located in the middle of the prefabricated slope protection block I1, and the flange slope 1.4 is located at the transition section between the flange 1.1 and the web 1.2; in the prefabricated slope protection block I1 The outer edge of the upper surface is provided with a chamfer 1.5; the flange slope 1.4 at both ends and the side of the web 1.2 form a groove segment 1.3; the length of the web 1.2 is the length of the flange 1.1 twice the length; the prefabricated slope protection block I1 is laid end to end on the described anti-wave protection slope 3, and among the left and right adjacent prefabricated slope protection blocks I1, two prefabricated slope protection blocks on one side The flange 1.1 of the upper end of I1 and the lower end is stuck on the web 1.2 in the described prefabricated slope protection block I1 of the other side; The length of described prefabricated slope protection block I is 80 centimeters, the width is 30 centimeters, and the height is 20 centimeters; The length of the flange 1.1 is 16 cm, the flange slope 1.4 is 8 cm; the web 1.2 is 32 cm.

When the slope is greater than 1:2 for the anti-wave slope protection 3, the lower surface of the prefabricated slope protection block I1 is provided with a groove section area 2, and the groove section area 2 includes a web located on the back of the web 1.2 The plate groove section 1.2.1 and the flange groove section 1.1.1 excavated along the back of the flange 1.1 at both ends and extending to the flange slope 1.4.

The excavation depth of the groove section area 2 does not exceed 1/2 of the height of the prefabricated slope protection block I1 (H≯1/2D); the web groove section 1.2.1 and the The web 1.2 has the same length and width; the excavation starting point A of the flange groove section 1.1.1 is greater than one-half of the length of the flange 1.1 (e≮1/2a).

The utility model also includes a construction method of the interlocking anti-wave and slope protection prefabricated block system, which includes the following steps;

①. Production of slope protection prefabricated blocks: Reasonably select the concrete mix ratio according to the I1 strength grade of the prefabricated slope protection blocks. After mixing on site according to the mix ratio, import the mixture into the aggregate bin, then push the mixture into the steel formwork, and pass the hydraulic pressure on the top. The board is compacted and then formed to produce a prefabricated slope protection block I1 that conforms to the design;

② Prefabricated block maintenance: After the prefabricated slope protection block I1 is pressed and formed by the machine, it is manually transported to a flat and solid prefabricated site. When the strength of the prefabricated slope protection block I1 reaches 70%, it can be transported to the dam surface;

③ Dam surface repair: Clean up the slope surface of wave protection slope protection 3, remove weeds, tree roots, gravel and other sundries, and properly repair the dam slope surface.

④. Determine the laying of the control network: use the total station and the leveling instrument to measure and locate, check the size of the anti-wave slope protection 3, measure and release the control network composed of the horizontal line and the reference line of the prefabricated blocks, and make corresponding control points The easy-to-recognize mark of , determine the size of the construction surface of wave protection slope protection 3, so as to determine the number of slope protection blocks laid;

⑤. Paving cushion material: a cushion layer is pre-laid on the anti-wave slope protection 3. The cushion material is sand and gravel with a particle size of D = 1mm to 20mm and D ₅₀ = 10mm, and a mud content of <5%. On the wave protection slope 3 and compact it, level the wave protection slope 3, and the thickness of the compacted cushion layer is 10cm;

After compaction, the thickness of the cushion layer is 10cm, and the function of laying the cushion layer is mainly to ① level the slope surface and ② reverse filter to prevent the soil particles in the slope protection from being carried away by the water flow;

⑥ Laying of prefabricated blocks: laying according to the pre-measured control network during laying, and manually laying prefabricated slope protection blocks I1 according to the laying sequence from bottom to top;

⑦. Concrete pouring in local vacancies: The corners where the wave protection slope protection 3 is difficult to lay are filled with concrete of the same strength as the prefabricated slope protection block I1, so that the slope of the wave protection slope protection 3 can meet the requirements of being flat, beautiful and complete after laying.

In step ⑥; the laying direction of the web 1.2 in the prefabricated slope protection block I1 is parallel to the flow direction of the water flow, and the upper and lower flanges 1.1 of the two prefabricated slope protection blocks I1 on one side are stuck on the other side. On the groove segment 1.3 in the prefabricated slope protection block I1.

In step ⑥; when laying the anti-wave protection slope 3; the slope surface of the anti-wave protection slope 3 satisfies that the unevenness within the range of 2m is controlled between -1 and 1cm.

Applications

According to the "Code for Design of Roller-Compacted Earth-rock Dams" (SL274-2001), for slope protection of concrete or reinforced concrete slabs with open joints, when the slope coefficient of the dam slope is m=2~5, the thickness of the stable slab under buoyancy can be according to

In the formula: η—coefficient, 1.1 is taken for the prefabricated armor plate;

h _P — wave height with cumulative frequency of 1%, in m;

L _m — average wavelength, m;

b — length of slab along dam slope, m;

ρ _c ——the density of the plate, t/m ³ ,

ρ _{w ——the} density of water, t/m ³ ;

m——slope coefficient of a single slope, if the toe of the slope is equal to α, it is equal to cotα.

According to the code formula, in the same project, under the same calculation conditions, t∝b ^-1/3 , that is, the thickness t of the concrete slope protection block is inversely proportional to the slab length b ^1/3 of the slope protection block along the dam slope, that is, the slope protection block along the slope The greater the length b of the dam slope to the slab, the smaller the thickness t of the slope protection block.

Note: For the same project, h _P , L _m , m, ρ _c , ρ _w , η are the same, t∝b ^-1/3 .

According to the above formula, the thickness of the slope protection is greatly affected by b (the length of the slab along the slope of the dam); after calculation, the adoption of the I-shaped prefabricated block of the utility model increases the length of the slab along the slope of the dam and reduces the length of the slab along the dam axis. The width and thickness can be reduced by nearly 20% compared with traditional hexagonal prefabricated blocks, which reduces engineering investment accordingly.

The earth-rock dam of a large reservoir has been in operation for many years, and the original dry-stone slope protection structure was severely damaged and needed to be reinforced. Considering the high durability and easy construction of concrete prefabricated block slope protection, the design proposes the slope protection method of I-shaped interlocking concrete prefabricated blocks. The size of the prefabricated slope protection block in this project is L=80cm in length, E=30cm in width, and D=20cm in height. Flange length a = 16cm, web length b = 32cm, web width f = 18cm, flange slope width c = 8cm, chamfer depth h = 1cm, after the implementation, the dam surface is smooth and beautiful, and a very good slope protection has been achieved Effect.

The slope of the groove corresponding to the 1.4 excavation of the flange slope is less than 1:1;

If a hexagonal prefabricated block of the same weight is used, the schematic diagram of the three-dimensional structure of the prefabricated block (as shown in FIG. 7 ). According to the calculation formula of appendix A.2.3 concrete slope protection thickness of "Roller Compacted Earth-rock Dam Design Regulations" (SL274-2001), the size of the hexagonal prefabricated block that meets the conditions can be calculated as side length R = 25cm, thickness J = 24cm, and Under the same calculation conditions, the thickness of the I-shaped prefabricated block is only 20cm. Under the condition of the same weight of the slope protection block, the thickness of the slope protection block is reduced by 20% to meet the same anti-shock and anti-floating effect. At the same time, compared with the hexagonal slope protection block, the I-shaped slope protection block adopts the flexible connection method of spatial interlocking and interlocking, which enhances the overall stability of the slope protection structure and can effectively resist the settlement deformation of the dam body, frost heave, wave erosion, earthquake, etc. External damage.

Statistics on the demand for I-shaped and hexagonal laying

Among them, the I-shaped prefabricated slope protection block I needs a total cost of about 10,000 yuan, but the traditional hexagonal slope protection block needs about 15,000 yuan. It has also been verified that the economic value of the I-shaped prefabricated slope protection block I is high, especially large When the area is laid, it has a good promotion prospect.

The parts not described in detail above are all prior art.

Claims (6)

1. a chain the guarding wave slope protection prefabricated section system, it is included in the gradient and is equipped with in work less than on the guarding wave slope protection (3) of 1:2 The prefabricated slope-protection block I (1) of font；

It is characterized in that: described prefabricated slope-protection block I (1) includes that the edge of a wing (1.1), web (1.2), groove segment (1.3), the edge of a wing are oblique Face (1.4), chamfering (1.5)；The described edge of a wing (1.1) is positioned at the top and bottom of described prefabricated slope-protection block I (1), described Web (1.2) is positioned at the centre of described prefabricated slope-protection block I (1), and described inclined-plane, the edge of a wing (1.4) is positioned at the described edge of a wing (1.1) changeover portion and between web (1.2)；Outer edge at the upper surface of described prefabricated slope-protection block I (1) is provided with chamfering (1.5)；The described inclined-plane, the edge of a wing (1.4) at two ends forms groove segment (1.3) with the side of described web (1.2).

One the most according to claim 1 chain the guarding wave slope protection prefabricated section system, it is characterised in that: described web (1.2) twice of the length on a length of described edge of a wing (1.1).

One the most according to claim 1 chain the guarding wave slope protection prefabricated section system, it is characterised in that: described prefabricated bank protection Block I (1) joins end to end and is laid on described the guarding wave slope protection (3), and adjacent in left and right described in prefabricated slope-protection block I (1) in, The edge of a wing (1.1) of the top and bottom of two prefabricated slope-protection block I (1) of side is stuck in the prefabricated slope-protection block I (1) described in opposite side In groove segment (1.3) on.

4. according to the chain the guarding wave slope protection prefabricated section system of the one described in any one in claim 1-3, it is characterised in that: institute A length of 80 centimetres of the prefabricated slope-protection block I stated, width is 30 centimetres, and height is 20 centimetres；The described edge of a wing (1.1) a length of 16 centimetres, inclined-plane, the edge of a wing (1.4) are 8 centimetres；Web (1.2) is 32 centimetres.

One the most according to claim 1 chain the guarding wave slope protection prefabricated section system, it is characterised in that: in the gradient more than 1:2 The guarding wave slope protection (3) time, the lower surface of described prefabricated slope-protection block I (1) is provided with groove segment region (2), described groove segment Region (2) includes the web groove section (1.2.1) being positioned at described web (1.2) back side and along the edge of a wing (1.1) described in two ends The back side is excavated, and extends to the edge of a wing groove segment (1.1.1) on described inclined-plane, the edge of a wing (1.4).

One the most according to claim 5 chain the guarding wave slope protection prefabricated section system, it is characterised in that: described groove segment district The cutting depth in territory (2) is less than 1/2nd of described prefabricated slope-protection block I (1) height；Described web groove section (1.2.1) identical with described web (1.2) length, width；Excavation starting point A of described edge of a wing groove segment (1.1.1) is more than / 2nd of the edge of a wing (1.1) length.