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Survey is the first step in the construction of foundation grouting reinforcement, the purpose is to understand the situation of the foundation, determine the method and scheme of reinforcement. The contents of the survey include the following aspects:
1. Determine the type and structure of the foundation: There are many types of foundations, such as shallow foundations, deep foundations, cantilevered foundations, etc. According to different foundation types, select the corresponding reinforcement method.
2.Check the current condition of the foundation: Conduct a comprehensive inspection of the foundation, including surface cracking, subsidence, etc. It is also necessary to check the soil quality and groundwater condition of the foundation, which can affect the selection and design of reinforcement solutions.
3.Measure the size and shape of the foundation: Measure the size and shape of the foundation and determine the geometric characteristics of the foundation. These data are very important for the design of the reinforcement scheme and the determination of the subsequent construction process.
4.Conduct geological surveys: understand the stratigraphy, including soil type, thickness, layering, groundwater level, etc. Geological survey results can help determine the choice of grouting agent and the way of grouting is done.
5.Analyze the force of the foundation: through mechanical calculation and analysis, determine the load and force transfer mode of the foundation. This has an important guiding role in determining the strength of grouting and construction methods.
Design is the key link of foundation grouting reinforcement, on the basis of survey, according to the existing data and engineering requirements, determine the reinforcement scheme and carry out detailed design. The content of the design includes the following aspects:
1. Select grouting materials and ratios: select appropriate grouting materials, such as cement, mortar, etc., according to the conditions of the foundation and the requirements of reinforcement. At the same time, the ratio of grouting is determined to ensure the feasibility of the reinforcement effect and construction technology.
2.Determine the method and process of grouting : according to the structure and geological conditions of the foundation, determine the way of grouting such as pore grouting, horizontal grouting and so on. At the same time, a detailed process flow is formulated, including the time, sequence and speed of grouting and so on.
3.Calculate the strength and thickness of the grout: According to the stress of the foundation and the bearing capacity of the soil, the strength and thickness of the grouting are calculated. At the same time, according to the actual situation of the construction, reasonable adjustment and optimization are carried out.
The reinforcement method is the core of the foundation grouting reinforcement construction, and the reinforcement construction is carried out according to the design scheme. Common hardening methods include the following:
1. Pore grouting: Fill the grouting material in the pores of the foundation and strengthen the foundation by filling the pores.
2.Horizontal grouting: Grouting is carried out on the horizontal plane of the foundation to increase the bearing capacity of the foundation.
3.Vertical grouting: Grouting is carried out in the vertical direction of the foundation to increase the stability of the foundation.
4.Prestressed grouting: The prestressing technology is used to apply prestress to the foundation to increase the bearing capacity and stability of the foundation.
5.Reinforcement and reinforcement: repair and strengthen the foundation that has been damaged to restore its normal function and bearing capacity.
Foundation grouting reinforcement construction includes survey, design and reinforcement method three aspects, through reasonable survey and design, select the appropriate reinforcement method for construction, can effectively improve the bearing capacity and stability of the foundation, ensure the safety and reliability of the project.