Trapezoidal-block embankment structure

Abstract

The invention discloses a trapezoidal-block embankment structure and relates to an embankment structure of embankment engineering. In the technical scheme, the embankment structure is formed by arranging trapezoidal blocks with a complete block in the cross-section direction on a foundation bed and carrying out longitudinal and continuous arrangement and connection on the blocks gradually; each trapezoidal block is a block body with the cross-section direction being similar to trapezoid and the whole body being similar to a trapezoidal prism; the included angles between the slope surfaces of the two horizontal sides of each trapezoidal block and the horizontal plane are not larger than 60 degrees, and are larger than or equal to 18 degrees and smaller than or equal to 45 degrees when waves are larger; the height of straight walls at the two horizontal sides of each trapezoidal block is not more than 1 / 3 of the height of each trapezoidal block; wave-absorbing and pressure-releasing holes can be arranged on the slope surface of each trapezoidal block. The trapezoidal-block embankment structure disclosed by the invention has the technical effects that the foundation pressure is less, the stability against overturning and the stability against the sliding in waves are good, and the capability for resisting accidental impact of floating objects such as ships is strong. The trapezoidal-block embankment structure is applicable to improving embankment structures, wave-wall structures and breast-wall structures of dam engineering such as buildings, breakwaters, sand control dams and revetments in the field of dam engineering.

Description

technical field [0001] The invention belongs to the field of dyke engineering and relates to a dyke body structure. Background technique [0002] According to technical documents such as "Code for Design and Construction of Breakwaters" (JTS 154-1-2011), the background technology of embankment structures such as remediation buildings, breakwaters, sand dikes, revetments, etc. that are closer to the present invention are as follows: [0003] 1. Throwing and filling block slope embankment: Prefabricated concrete blocks are used to replace block stones, and the trapezoidal section is thrown and filled without face protection. Its disadvantages are: similar to block stones, it is composed of many prefabricated concrete blocks stacked vertically, which is a loose structure, and its ability to resist wave action is limited. The embankment width should not be less than 3 times the design wave height, and the amount of concrete will be large. [0004] 2. Chamfered caisson vertical...

AI Technical Summary

Problems solved by technology

Its disadvantages are: similar to block stones, it is composed of many prefabricated concrete blocks stacked vertically, which is a loose structure, and its ability to resist wave action is limited. The embankment width should not be less than 3 times the design wave height value, and the amount of concrete is large

Its disadvantages are as follows: 1) The main body in front of the wall is still a straight wall, and the standing wave effect is significant (the code still considers the wave pressure according to the standing wave), and the wave force is large; 2) The resultant force of the wave force points outside the rear toe of the vertical embankment, which is against the tilting of the vertical embankment. Stability is unfavorable; 3) When the height of the embankment is high, the average base pressure caused by the self-weight basically increases linearly, and the base pressure caused by the wave action forms a trapezoidal distribution. After the superposition of the two, the local base pressure further increases. It cannot be used on soil foundations, and a thicker riprap bed is also required on foundations with medium bearing capacity

[0005] 3. Horizontal mixed vertical embankment: the back wave side is an upright embankment, and the front wave side is filled with many artificial blocks to form a slope. Insufficient to caisson vertical embankment

Its disadvantages are as follows: 1) Although the semicircular member is provided with a pressure relief hole on the bottom plate to reduce the wave buoyancy force, its width is basically twice the height. Since the weight and height are basically square, and it is a hollow structure, when When used in conditions of high foundation bed, short embankment, and large waves, due to height restrictions and hollow effects, the weight of the semicircular member is small, and the ability to resist wave action often cannot meet the needs; 2) Although the semicircular caisson has fillers and self-weight increase, but the width is basically twice the height. Since the weight and height are basically in a square relationship, when used in conditions of high foundation bed, short embankment, and large waves, the weight of the semicircular caisson is limited by the height, and it cannot If pressure relief holes are installed, the wave pressure and wave buoyancy cannot be reduced, and the ability to resist wave action often cannot meet the stability requirements; Punching ability) is poor, resulting in frequent accidental damage to ships and other drifting objects

However, this technology has the following deficiencies: 1) Since the weight of the triangular caisson has a square relationship with the height, when it is used in conditions of high foundation bed, short embankment, and large waves, the weight of the triangular caisson is limited by the height, and the ability to resist waves is often It cannot meet the stability requirements; 2) The side plate of the caisson is a thin-walled structure, which has poor resistance to concentrated force (punching ability), and is easily damaged if it is accidentally hit by drifting objects such as ships; It is easy to be damaged by accidental impact of drifting objects

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