Introduction to stone slopes?

Speaking of stone slopes? At this stage, what are the regulations for stone slopes in our country? What's the basic situation? The following is the content related to stone slopes sorted out by the editor of Zhongda Consulting. The basic situation is as follows:

The editor inquired through the construction knowledge column of the construction industry encyclopedia website - Construction Network. The content related to slopes is as follows:

Basic methods of stone slopes:

1. Excavation of stone slopes adopts a top-down excavation method. At the same time, a certain range above and below the slope opening line should be prepared. Internal locking and anchoring work. For slopes that require support, the method of supporting while excavation is adopted. The height difference between the system anchors and shotcrete in permanent support and the excavation working surface is not greater than the height of one ladder section. The pre-installation in permanent support is The height difference between the stress anchor cable and the excavation working surface shall not be greater than the height of two ladder sections.

2. When excavating slopes, blasting methods that damage the slope must not be used. A protective layer can be reserved within 3-5 meters of the slope; you can also perform pre-split blasting on the slope first and then To carry out excavation and blasting of the main body of stone, ladder sections and pre-split blasting are generally used for one-time excavation. Strictly control the maximum amount of single drug at one time, and the particle vibration speed must meet the design requirements.

3. For rock masses with easily weathered, broken or unstable slopes, construction safety protection should be done first and support should be provided while excavation. In areas with geological defects such as faults and fissures, excavation of the next layer should be carried out only after the supporting work is completed.

4. When the excavation surface is close to the design elevation of the horse track or platform, a protective layer of 1.5 to 2 meters should be reserved for horse paths and platforms at all levels. The excavation of the protective layer should be carried out strictly in accordance with the technical requirements for protective layer excavation, and On the outside of the bridleway or platform, set up bridleway guardrails and other debris-blocking measures to prevent gravel from sliding down.

5. When excavating near the edge of other buildings or near electric poles, cables, wires, wind and water pipes, etc., the technical department should formulate special safety protection measures based on the actual situation.

6. The layering thickness of slope excavation should be determined based on factors such as topographic and geological conditions, the height difference between the two horse roads, the technical parameters of drilling equipment and loading machinery, etc.

Regulations on slope repair and inspection of highway stonework projects:

1) The excavation slope should be repaired in sections from the excavation surface downwards. Each time the excavation is 2 to 3m, it should be Brush the newly excavated slopes and remove dangerous rocks and loose stones at the same time.

2) It is not advisable to over-excavate rocky slopes.

3) Quality requirements for stone slopes: There should be no loose rocks or dangerous rocks on the slopes.

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