Foundation settlement is a common building disease. ground subsidence reinforcement solutions technology, with its advantages of fast construction, minimal disturbance and low cost, is an ideal solution for dealing with weak foundations. This technology fills the voids in the soil and enhances its bearing capacity by injecting special slurry under high pressure. It is applicable to the foundation reinforcement of various buildings such as buildings and factories. No large-scale excavation is required, the repair is fast, and it effectively solves the problem of uneven settlement! The ground subsidence reinforcement solutions technology is used for foundation reinforcement treatment, and the process is as follows:

I. Technical Principles

ground subsidence reinforcement solutions technology injects slurry (such as cement slurry, chemical slurry, etc.) into the soil layer of the foundation through high-pressure equipment. Under high pressure, the slurry can penetrate the pores and fissures in the soil layer, fill and consolidate, forming a high-strength consolidated body. This can not only enhance the bearing capacity of the foundation, but also effectively reduce the settlement and uneven settlement of the foundation, and improve the overall stability and waterproof performance of the foundation.

Ii. Operating Steps

1. On-site investigation

Conduct a comprehensive investigation of the settlement area of the foundation to determine the specific location, extent and degree of the settlement.

Collect geological data to understand the properties and distribution of the foundation soil layer.

2. Scheme Design:

Develop detailed ground subsidence reinforcement solutions based on the survey results and geological data.

Determine the position, depth, spacing of the grouting holes and the type of grouting material.

3. Equipment preparation:

Prepare grouting equipment, including high-pressure grouting pumps, grouting pipes, drilling RIGS, etc.

Prepare grouting materials, such as cement slurry, chemical grout, etc.

4. Drilling:

Drill holes at the predetermined positions using a drilling rig, with the hole diameter generally ranging from 50mm to 100mm. The new high-pressure grouting diameter of Tongcheng Soft Foundation's trenchless repair technology is generally between 10mm and 40mm, and it needs to be analyzed in combination with specific circumstances.

The drilling depth should meet the design requirements to ensure that the grouting can cover the settlement area.

5. Grouting:

Insert the grouting pipe into the borehole and ensure that the bottom of the grouting pipe reaches the designed depth.

Start the high-pressure grouting pump and inject the grout into the foundation soil layer through the grouting pipe.

The grouting pressure needs to be adjusted in combination with the properties of the soil layer and the design requirements.

6. Monitoring:

During the grouting process, the grouting pressure, grouting volume and ground uplift conditions are monitored in real time.

Based on the monitoring data, adjust the grouting parameters in a timely manner to ensure the grouting effect.

7. Sealing:

After the grouting is completed, pull out the grouting pipe and use cement mortar or special sealing materials to seal the borehole to prevent the grout from flowing back.

8. Maintenance:

After the grouting is completed, the grouting area should be maintained to ensure that the grout has fully solidified.

The curing period is generally 7 to 14 days. Avoid applying additional loads to the foundation during the curing period.

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