High wave impedance directional sliding combined energy dissipation body suitable for rock foundation excavation

Abstract

The invention provides a high-wave resistance orientation resistance sliding combination energy dissipation body applied to rock foundation excavation forming. The high-wave resistance orientation resistance sliding combination energy dissipation body applied to the rock foundation excavation forming is characterized by comprising a round table, a hemispheroid and flat inflatable cavities, whereina bus has an angle of 45 degrees with the bottom surface; the upper surface of the hemispheroid is fixedly connected with the bottom surface of the round table, the lower surface of the hemispheroidarches downwards to form a semi-spherical shape, and the diameter is equal to the bottom surface diameter of the round table; and the flat inflatable cavities are formed in the round table and the hemispheroid and in an ellipsoid shape, an interface of the round table and the hemispheroid is used as a symmetric surface, the length direction is the horizontal direction in which the symmetric surface is located, and the width direction is the perpendicular direction in which the axis lines of the round table and the hemispheroid are located. According to the high-wave resistance orientation resistance sliding combination energy dissipation body applied to the rock foundation excavation forming, the operability of energy dissipation body site construction is high, various perpendicular holescan be combined to perform construction, complete reflection of exploded shock waves can be realized, lateral exploding crushing of a cannon hole is effectively increased, cannon bottom damage is avoided, and the foundation surface excavation construction efficiency and exploding quality are greatly improved; and the high-wave resistance orientation resistance sliding combination energy dissipation body applied to the rock foundation excavation forming is particularly applied to excavation forming of a rock foundation surface in the condition of containing water monitor holes.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, and in particular relates to a high wave impedance directional sliding combined energy dissipation body suitable for rock foundation excavation and formation. [0002] technical background [0003] In the construction of hydropower projects, petrochemical bases and nuclear power projects, a large number of rock foundations are usually excavated. The rock foundation surface is the permanent bearing surface of the engineering building, and its excavation quality will directly affect the stability and safety of the superstructure. . As a fast and efficient rock excavation method, drilling and blasting will produce some negative effects such as blasting vibration and blasting damage while completing the blasting and blasting of rock, which will inevitably cause certain harm to the forming quality of the rock foundation surface. Therefore, the rock The excavation formation and quality con...

AI Technical Summary

Problems solved by technology

However, due to the limitation of on-site construction conditions, the hole wall formed by drilling is not absolutely smooth, and there are often various gravel and protrusions on the hole wall. When a conical energy dissipation structure is placed from the hole to the bottom of the hole, it is inevitable Frictional contact with the hole wall often causes the hole to be stuck, which greatly affects its operability on site; moreover, it is basically difficult to keep the bottom surface of the conical energy dissipation structure in a horizontal state after installation, which will cause the explosion stress wave to be emitted downward. Exacerbate hole bottom damage

The advantage of the spherical energy-dissipating structure is that it can change from sliding to rolling, reducing the contact area between the energy-dissipating structure and the hole wall. It can squeeze and slide when encountering hole wall protrusions and gravel. The operation is extremely convenient and will not occur during on-site construction. However, the contact surface between the spherical energy dissipation structure and the explosion shock wave is a spherical surface, and the actual reflection energy dissipation effect on the explosion shock wave is weaker than that of the conical energy dissipation structure.

In addition, when the groundwater level is high and there is water in the blast hole, the explosion shock wave transmitted through the energy dissipation structure may still enter the protected foundation rock mass through the water body

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