Bian Xiao made an inquiry through the architectural knowledge column of "Construction Network", an encyclopedia website of the construction industry. The relevant contents of the slope are as follows:
Basic methods of rocky slope:
1. Top-down excavation method is adopted for rock excavation of the slope, and the locking and anchoring work within a certain range above and below the opening line of the slope shall be well done. For the slope that needs support, the excavation support method is adopted. The height difference between the system anchor and shotcrete in permanent support and the excavation face is not more than one step height, and the height difference between the prestressed anchor cable in permanent support and the excavation face is not more than two steps height.
2, slope excavation, blasting method shall not be used to destroy the slope, slope protection layer can be reserved within 3-5 meters; It is also possible to carry out slope presplitting blasting first, and then carry out main rock excavation blasting. Generally, bench and presplitting blasting are used in one excavation. Strictly control the maximum single charge, and the particle vibration speed must meet the design requirements.
3. For the rock mass whose slope is easy to be weathered, broken or unstable, construction safety protection should be done first, and support should be carried out while excavating. In places with geological defects such as faults and cracks, the excavation of the next layer can only be carried out after the support operation is completed.
4. When the excavation face is close to the design elevation. Or platforms, protective layers of 1.5 ~ 2m shall be reserved. Protective layer excavation shall be carried out in strict accordance with the technical requirements of protective layer excavation, and slag retaining measures such as guardrails shall be set on the outside. Or platform, to prevent the stone slag from slipping.
5. When excavating on the edge of other buildings or near poles, cables, wires and feng shui pipes, the technical department shall formulate special safety protection measures according to the actual situation.
6. The layered thickness of slope excavation should be determined according to the topographic and geological conditions, the height difference between the two roads, the technical parameters of drilling equipment and loading machinery.
Provisions on regulation and inspection of highway stone slope;
1) The excavated slope shall be renovated in sections from the excavation face, and the newly excavated slope shall be brushed every 2 ~ 3m, and dangerous stones and loose stones shall be removed at the same time.
2) Rock slopes should not be over-excavated.
3) Quality requirements of rock slope: the slope is free of turquoise and dangerous stones.
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