foundation subsidence treatment projectsare a serious safety hazard. In order to prevent these problems, comprehensive prevention should be taken to ensure the stability of the building from site survey, reasonable design, foundation reinforcement, water level control, etc.

First, what is foundation settlement?

Foundation settlement refers to the ground surface subsidence caused by the compaction of the soil layer under the action of additional stress. Excessive settlement, especially uneven settlement, will cause the building to tilt and crack so that it cannot be used normally.

Second, the performance of building foundation settlement

After the building is built, there will be a certain degree of settlement deformation, uniform settlement has little to do with it, uneven settlement will cause window deformation, underground pipeline rupture, house tilt, wall and floor cracking and other problems, and serious collapse accidents will occur. We found such problems should pay attention to, if the house tilt is within 0.4%, which is normal, there is no need for foundation treatment; If it reaches 0.7%, it is necessary to take corrective measures and carry out foundation reinforcement treatment to prevent the problem from spreading.

Third, the reasons for building foundation settlement

There are many factors that cause foundation settlement, mainly including the following:

1. Soil characteristics: Different soil characteristics have different effects on foundation settlement. For example, a loose sandy soil foundation is more likely to settle and cause structural damage to the house.

2. Change of groundwater level: The change of groundwater level is one of the important reasons for foundation settlement. When the groundwater table falls, the soil in the foundation will compress and settle downward due to the evaporation and infiltration of water.

3, underground mining: underground open-pit mining, underground tunnel construction and other activities will destroy the integrity of the underground soil, resulting in foundation settlement.

4, construction consolidation settlement: in the process of building construction, due to the different construction technology and construction site environment, it may cause consolidation settlement to the foundation.

5, near construction: such as surrounding construction, digging foundation pits, building tunnels, building subways, etc., resulting in house tilting.

Fourth, how to prevent?

1, site survey: the implementation of extensive geological survey, determine the soil type, aquifer status and other information, site selection to avoid bad geological locations.

2, reasonable design: ① to optimize and improve the foundation design to increase the bearing capacity of the foundation; ② Strengthen the reinforcement measures of the foundation, such as the use of reinforced geosynthetic materials, reducing the spacing of the foundation, etc.

3, foundation reinforcement: Hengxiang Hongye lossless controllable soil solidification technology correction and righting plan, using miniaturized equipment, microhole treatment, non-destructive control, does not affect the normal life of residents, improve soil properties, fast and accurate consolidation of soil, and efficiently solve the problem of high-rise building tilt correction.

The technology is suitable for the treatment of different geological foundations such as silt, silty soil, cohesive soil, silt, sandy soil, gravel soil, artificial fill soil, etc. Good economic and social benefits; The processing method is flexible and simple, and the construction period is short; Flexible lifting, no need to break, can achieve deep reinforcement of building soil.

4, water level control: (1) Strengthen the monitoring and regulation of the groundwater level to ensure that the groundwater level is stable within a reasonable range; (2) Drainage water treatment should be carried out in the area of abnormal rise of groundwater level to reduce the loss of foundation bearing capacity; Install an effective groundwater drainage system to ensure the stability of the foundation.

5, regular monitoring: installation of monitoring equipment (such as level, total station, tilt sensor, etc.), regular monitoring and evaluation of foundation settlement, timely adjustment and improvement of treatment programs.

In short, the choice of tilt correction method after the settlement of the building should be based on the specific situation of the settlement of the building, you can consult a professional foundation reinforcement company, when selecting the reinforcement correction plan, you need to comprehensively consider the technical simplicity, construction period, social benefits, economic benefits, feasibility and other aspects, you can prepare the geological survey report, building structure plan, foundation structure diagram in advance. Settlement observation records and other data are convenient for engineers to evaluate the settlement of buildings in various aspects.

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