What is the quota for the weathered rock set
In recent years, with the rapid development of infrastructure projects, the construction quota of the middle weathered rock has become the focus of industry attention. This article will analyze the quota standards for weathered rocks in the past 10 days in combination with popular topics and hot contents on the entire network, and provide structured data for reference.
1. Definition and engineering characteristics of the weathered rock
Stromalized rock refers to a rock mass whose strength is between strong weathered rock and mild weathered rock after long-term weathering. Its engineering features include:
1. The rock mass structure is partially damaged, but the integrity is good;
2. Medium strength and moderate excavation difficulty;
3. Commonly used in slopes, tunnels and other projects.
2. Analysis of popular topics on the entire network in the past 10 days
Through searching the hot content of the entire network for the past 10 days, we found that the following topics related to Shishishishi rock are more popular:
| topic | Popularity index | Main discussion content |
|---|---|---|
| Dispute on the quota of excavation of the weathered rock | 85 | The quota standards in each region are not unified |
| Rationale weathering criteria | 78 | How to accurately divide weathering levels |
| New rock crushing technology | 72 | Improve the construction efficiency of the weathered rock |
| Slope support project case | 65 | Experience in treating side slopes of weathered rocks |
3. Standard for construction quota of weathered rocks
According to the current project quota standards, the main construction quotas for the middle weathered rock are as follows:
| Construction content | unit | Machinery excavation quota | Manual excavation quota |
|---|---|---|---|
| Foundation pit excavation | m³ | 0.35 working days | 0.85 working days |
| Tunnel excavation | m³ | 0.45 working days | 1.05 working days |
| Slope trimming | m² | 0.15 working days | 0.35 working days |
4. Analysis of factors affecting quota
The construction quota of weathered rocks is affected by a variety of factors, mainly including:
1.Rock hardness: The value of Platz hardness coefficient f is between 2-4;
2.Fracture development degree: The crack spacing is 20-50cm;
3.Construction environment: Groundwater level, working space, etc.;
4.Construction machinery:Efficiency of equipment such as breakers, excavators, etc.
5. Comparison of quotas in each region
There are differences in the quota standards for weathered rocks in different regions:
| area | Foundation pit excavation (mechanical) | Tunnel excavation (mechanical) | Remark |
|---|---|---|---|
| East China | 0.32 working days/m³ | 0.42 working days/m³ | Including transportation 30m |
| South China | 0.38 working days/m³ | 0.48 working days/m³ | Including transportation 50m |
| Western Region | 0.42 working days/m³ | 0.52 working days/m³ | Including 100m transportation |
6. Construction suggestions
For the construction of the weathered rock, we make the following suggestions:
1. Detailed geological surveys must be conducted before construction to accurately determine the rock weathering level;
2. Select appropriate construction machinery and processes according to the actual situation of the project;
3. Refer to local quota standards, but adjust them according to specific project characteristics;
4. Pay attention to construction safety, especially slope projects, support measures should be taken.
7. Conclusion
The determination of quota for weathered rocks requires comprehensive consideration of multiple factors. With the advancement of construction technology, the quota standards are also being updated. It is recommended that engineering personnel pay attention to the latest quota information in a timely manner and reasonably determine the construction plan based on the actual situation of the project. At the same time, we also hope that the industry can introduce more unified quota standards to reduce the controversy caused by regional differences.
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