What is the standard for crushed concrete cover
In construction projects, crushing concrete is a common construction process, especially in renovation or demolition projects. Reasonable application of quotas is the key to controlling costs and ensuring construction efficiency. This article will analyze the application methods of quota for crushed concrete in detail based on popular topics and hot contents in the past 10 days of the entire network, and provide structured data for reference.
1. Common construction scenarios of crushed concrete
Broken concrete is usually used in the following scenarios:
1. Demolition of old buildings
2. Renovation of ground hardening layer
3. Road restoration project
4. Basement renovation
5. Bridge maintenance
2. Applying the quota method for crushed concrete
The application of crushed concrete must be comprehensively considered based on factors such as construction method, concrete strength, crushing tools, etc. The following are common quota categories:
| Construction method | Quota number | unit | Labor fee (yuan) | Machinery fee (yuan) |
|---|---|---|---|---|
| Artificial breakage | AZ-001 | m³ | 120 | 0 |
| Mechanical crushing (small equipment) | AZ-002 | m³ | 60 | 80 |
| Mechanical crushing (large equipment) | AZ-003 | m³ | 30 | 150 |
| Blasting and shattering | AZ-004 | m³ | 20 | 200 |
3. Key factors affecting the application of quotas
1.Concrete strength: It is difficult to break high-strength concrete, and the quota labor and machinery costs need to be adjusted.
2.Work environment: The narrow space may limit the use of machinery and require increased labor costs.
3.Crushing after treatment: Whether the waste is needed to be cleaned up, the transportation cost must be calculated separately.
4.Construction period requirements: Emergency projects may require increased mechanical investment, affecting the quota.
4. Analysis of popular topics across the Internet
According to the network-wide data over the past 10 days, the following topics are highly correlated with the quota of broken concrete:
| Hot Topics | Discussion hot topic | Related quota issues |
|---|---|---|
| Renovation of old communities | high | Dispute on artificial breaking of quotas |
| Construction waste recycling | middle | Calculation of post-crumbing treatment cost |
| New crushing equipment | high | Mechanical quota adjustment |
| Environmental protection construction requirements | middle | Dust prevention measures are included in the fixed amount |
5. Precautions for applying quota
1. Be sure to check the latest quota standards issued by the local cost department.
2. For special projects (such as cultural relics and building renovation), a separate quota must be declared.
3. Under night construction or special climate conditions, a fixed quota adjustment coefficient can be applied for.
4. When applying new crushing technology, it is recommended to refer to similar project cases.
VI. Typical case analysis
In a city road renovation project, the application of broken concrete is as follows:
| Project content | Original quota | Actual quota | Adjustment reasons |
|---|---|---|---|
| The main road surface is broken | AZ-002 | AZ-003 | Concrete strength exceeds expectations |
| The sidewalk is broken | AZ-001 | AZ-002 | Switch to small machinery to improve efficiency |
| Curb removal | AZ-001 | AZ-001 | Keep it broken |
7. Summary and Suggestions
1. Establish a complete crushed concrete construction file to record the actual employment and machinery use.
2. Regularly pay attention to the update notifications of the quota station and timely adjust the quotation strategy.
3. For the application of controversial quotas, it is recommended to communicate and confirm with the supervision unit in advance.
4. Consider using BIM technology to simulate the crushing process and optimize the selection of quotas.
By reasonably applying the quota, the construction quality can be guaranteed and project costs can be controlled. It is recommended that engineering personnel flexibly use various quota standards based on the actual situation of the project.
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