There are many design codes for foundation treatment, and which ones do you know?

In fact, the most important thing in building a house in the countryside is the foundation construction, so that the foundation construction is foolproof, the house can be both stable and safe. Many times we are not reluctant to spend money, but more often we spend money but cannot achieve the desired effect, how wronged! Refuse to spend any more unjust money, and do the foundation construction of self-built houses in rural areas!

A homeowner in Sichuan said that now the village is competing to build houses, but all those who have good families have built small villas. Although their own house is not bad, but there has been no time to build a house, compared with other people's new houses, their old houses are simply not too cold!

It's best not to be soft and one side；If the site selection is not good and the soil quality is not good, then it is easy to cause uneven settlement of the foundation, so the first and most important step is the site selection, which is related to the firmness of the construction foundation; In addition, it is about the consideration of how deep the foundation should be buried, in accordance with the "Code for the Design of Building Foundations":"Except for rock foundations, the buried depth of the foundation should not be less than. Business was good this year, and the family didn't want to wait any longer, so they started building a house too!

Because I wasn't at home, I found the construction team of our residential park and went out.

The second thing to pay attention to is that when building a house, you should plan how to build it, how many rooms to build, the materials used and the labor to be found, which are all planned. It is not easy to build a house in the countryside, especially now that the labor cost is very high, and the material cost is also very high, so special attention should be paid to the correct principle. Notes:

There must be columns at the main corners, and each wall must also have columns The shell must be snapped and clamped tightly Do not emerge Protruding from the top The steel bar must be national standard This is the method and precautions for rural foundations!

I have seen a lot of self-built houses in rural areas, and when I was doing the foundation, I always thought that it would be almost on the line, and when it came to the final decoration, everything required high-end luxury, in fact, this is completely a kind of putting the cart before the horse. Rural self-built houses are rarely professionally designed, so there is no accurate calculation according to the load, in this case we should make the foundation more solid, even if it causes a certain amount of waste, it is better than the bearing capacity, after all, safety is still the most important.

1.The increased treated foundation should meet the requirements of building bearing capacity, deformation and stability;

2.Increase the inspection requirements for the comprehensive safety factor of the acceptance inspection of the foundation treatment project using a variety of foundation treatment methods;

3.The materials used in the addition of foundation treatment should meet the requirements of durability design according to the environmental category of the site;

4.The analysis method of the overall stability of the treated foundation was added;

5.The design check method of reinforced cushion is added;

6.Increase the design and construction requirements of vacuum and stacking combined preloading treatment;

7.Increase the design parameters of high compaction energy;

8.Pile strength verification method with bond strength reinforcement considering the correction of foundation depth to increase the bearing capacity of composite foundation;

9.increase the design and construction requirements of multi-pile composite foundations;

10.increase grouting reinforcement;

11.increase the reinforcement of micro piles;

12.increased inspection and monitoring;

13.The key points of static load test of single pile of composite foundation reinforcement are added;

14.The key points of static load test of the treated foundation are added.

Foundation refers to the soil or rock mass that supports the foundation underneath the building. The soil layer that serves as the foundation of a building is divided into rock, gravel soil, sand, silt, clayey soil and artificial fill. There are two types of foundations: natural foundations and artificial foundations.

A natural foundation is a natural layer of soil that does not need to be reinforced by man. Artificial foundations need to be reinforced, and there are stone chip cushions, sand cushions, mixed ash backfill and then tamping, etc. The foundation treatment specifications specifically include: 1. Deep compaction method (DDC) deep compaction method (DDC) in the hole Patented new technology of foundation treatment (patent number) is to form a hole in the foundation first, put the strong compaction hammer into the hole, and force compaction while adding material or layered filler.

The bearing capacity of the foundation, the deformation calculation of the foundation, the stability of high-rise buildings, towering structures and retaining walls that are often subjected to horizontal loads, as well as the buildings and structures built on or near the slope, should be checked, and the stability of the foundation pit engineering should be checked. When there is a floating problem in the basement or underground structure of the building, the anti-floating calculation should be carried out.

Adapting measures to local conditions, using local materials, protecting the environment, saving resources, strengthening the foundation, and trying not to change the attributes of the land are all aspects that need to be paid attention to.

CGF Foundation Treatment (Rigid Piles):It is a composite foundation of cement, fly ash, gravel and other mixtures mixed with water and poured into the soil to form a vertical reinforcement. When the pile material is reinforced concrete prefabricated pipe pile, pay attention to the use of concrete pile cap or concrete core higher than the strength grade of the reinforcing body to reduce the penetration deformation of the pile top.

Cement-soil mixing pile (rigid pile):Cement is used as the main material of the curing agent, and the curing agent and the foundation soil are forcibly stirred to form a composite foundation with vertical reinforcement through deep mixing machinery. It is suitable for dealing with normally consolidated silt, silty soil, plain fill, cohesive soil (soft plastic, plastic), silt (slightly dense, medium dense), silt fine sand (loose, medium dense), medium coarse sand (loose, slightly dense), saturated loess and other soil layers.

Precautions for foundation treatment in self-built houses.

When using AC power supply, special attention should be paid to the grounding protection device of the electrical facilities, when there will be high-voltage lines near the construction site, it is necessary to determine the safety distance of occupational health according to the height of the construction equipment and the voltage of the line, so as to prevent the occurrence of electric shock accidents due to high-voltage discharge.

When tamping the foundation, the crane should be supported smoothly, and in case of a weak foundation, it is necessary to use a long sleeper or a roadbed plate to support the pad. Before lifting the rammer, the rotary brake should be firmly clamped to prevent the crane from rotating unstable after the rammer is lifted, and a tipping accident occurs.

The foundation refers to the site of this part of the direct impact of the project, if the natural foundation is very weak, can not meet the requirements of foundation strength and deformation, then build the foundation after manual treatment in advance, this foundation reinforcement method is called foundation treatment. For a certain project, the comprehensive geological conditions, superstructure requirements, surrounding environmental conditions, materials, construction period, equipment conditions and economic indicators should be considered when selecting treatment.

The area of the foundation treatment should be at least wider than the foundation. Foundation treatment should be based on the type, strength and density of the foundation soil, in accordance with the design requirements, combined with the site conditions, to take the corresponding treatment methods.

When it comes to the technical specifications for building foundation treatment 2012, the relevant construction people are still relatively unfamiliar, what are the main foundation treatment specifications in China at this stage? What are the provisions of the technical specifications for foundation treatment on the scope of practice of construction enterprise personnel? The following is the basic content of the 2012 technical code for building foundation treatment compiled by Zhongda Consulting for construction professionals, the specific content is as follows:

Through the collation of relevant contents, the main foundation treatment specifications mainly include: "Highway Subgrade Design Code", "Building Foundation Treatment Technical Specification", "Building Pile Foundation Technical Code JGJ94-2008" and other foundation treatment specifications.

Technical Specifications for Ground Treatment Scope of Practice Specifications:

The treated foundation should meet the requirements of building foundation bearing capacity, deformation and stability, and the design of foundation treatment should also meet the following requirements:

After the treatment of the foundation, when there is still a weak substratum within the range of the stress layer, the foundation bearing capacity of the substratum should be checked.

According to the foundation deformation design or should be deformation check and need to carry out the foundation treatment of the building or structure, should be treated after the foundation deformation test and training calculation. 3 to build on the treated foundation by a larger horizontal load or erosion on the slope of the building and structure, should carry out the foundation stability check.

The construction quality inspection of the replacement cushion must be carried out in layers, and the sublayer soil should be laid after the compaction coefficient of each layer meets the design requirements.

The completion acceptance inspection of the preloaded foundation shall comply with the following provisions:

The vertical deformation and average degree of consolidation completed by preloading should meet the design requirements within the treatment depth range of the water opening shaft and the condensed soil layer below the bottom surface of the shaft.

In-situ cross shear tests and indoor geotechnical tests should be carried out on the precompacted foundation soil.

The construction quality inspection of the compacted foundation should be carried out in layers. Each process is completed, and the acceptance shall be carried out according to the design requirements, and the next process shall not be constructed without acceptance or unqualified acceptance.

Legal Analysis:1The increased treated foundation should meet the requirements of building bearing capacity, deformation and stability;

2.Increase the inspection requirements for the comprehensive safety factor of the acceptance inspection of the foundation treatment project using a variety of foundation treatment methods;

3.The materials used in the treatment of the foundation should meet the requirements of durability design according to the type of site environment.

Legal basis: Technical Code for Building Foundation Treatment JGJ79-2002

Article 1 has added the design and construction provisions of foundation treatment methods such as strong compaction replacement method, cement fly ash gravel pile method, rammed cement soil pile method, cement soil mixing method (dry method), lime pile method and column hammer punching and expanding pile method.

Article 2 of the original specification in the general provisions, the main symbols, the basic provisions, the replacement method, the preloading method, the strong compaction method, the vibroflotation method, the soil or ash compacted pile method, the sand and gravel pile method, the deep mixing method, the high-pressure jet grouting method and the key points of the composite foundation load test have been modified, supplemented and improved.

Article 3 The chapter on the underpinning method has been cancelled and its content has been adjusted: the content of the single-liquid siliconization method and the lye method has been supplemented into an independent chapter; Other methods are included in Chapter 17 of Plexus Burying.

The Ministry of Construction is responsible for the management and interpretation of the provisions of this specification, and the editor-in-chief is responsible for the interpretation of the specific technical content.

Technical Code for Design of Building Foundations This code is based on the requirements of the Ministry of Construction Jianbiao [1997] No. 108, and is revised by the China Academy of Building Research in conjunction with relevant architectural design enterprises, architectural survey units, construction enterprises, research and teaching units to the Code for the Design of Building Foundations GBJ7-89. The following is the content of the latest building foundation design specifications compiled by Zhongda Consulting:

Technical Code for Design of Building Foundation Foundation" Basic Introduction:

Technical Code for the Design of Pure Foundation of Building Foundation" This code is managed by the Ministry of Construction and the interpretation of the mandatory provisions, the China Academy of Building Research is responsible for the interpretation of the specific technical content, and the Institute of Standards and Quotas of the Ministry of Construction organizes the China Building Industry Press to publish and distribute.

Technical Code for the Design of Building Foundations" This code is applicable to the design of foundations for industrial and civil buildings (including structures). For collapsible loess, permafrost, expansive soil and foundation design under the action of mechanical vibration load, it should also comply with the provisions of the current national corresponding professional standards.

Technical Code for the Design of Building Foundations shall comply with the provisions of this code, and shall also comply with the provisions of the current national standards.

Technical Code for Design of Building Foundation Basic Principles of Design:

Foundation design must be based on the use and safety level of the building, the layout and the type of superstructure, fully consider the geotechnical conditions of the building site and the foundation, combined with the construction conditions and the construction period, the cost and other aspects of the requirements, reasonable selection of the foundation scheme, according to local conditions, careful design, in order to ensure the safety and normal use of the building.

The Code for Design of Building Foundations is revised by the China Academy of Building Research in conjunction with relevant design, survey, construction, research and teaching units on the Code for the Design of Building Foundations GBJ7-89. The following is the latest version of the relevant building foundation design code for Zhongda Consulting:

Basic Introduction to the Code for the Design of Building Foundations:

In order to implement the technical and economic policy of the country in the design of the foundation, to achieve safety and application, advanced technology, economic reasonableness, ensure quality and protect the environment, the "Code for Design of Building Foundation Foundation" is formulated. The current version of GB50007 2011 is revised on the basis of the Code for Design of Building Foundations (GB50007-2002) and will come into force on August 1, 2012. The new specification is divided into 10 chapters and 22 appendices, and the main technical contents include:

General Provisions, Terminology and Symbols, Basic Provisions, Classification of Foundation Geotechnical and Engineering Characteristic Indicators, Foundation Calculation, Mountain Foundation, Weak Foundation, Foundation Pit Engineering, Inspection and Monitoring. This topic mainly explains the design and calculation of foundation foundation of construction enterprises, mountain foundation, foundation pit engineering, and engineering monitoring.

The current version is the latest version of the Code for the Design of Building Foundations GB 50007 2011, which will come into force on August 1, 2012. The editor-in-chief department is the Ministry of Housing and Urban-Rural Development of the People's Republic of China. Old Versions:

Code for Design of Industrial and Civil Building Foundations (TJ7-74) was implemented on November 1, 1974.

Code for Design of Building Foundations GBJ7-89 came into force on January 1, 1990, and Code for Design of Foundations for Industrial and Civil Buildings TJ7-74 was repealed on June 30, 1991.

Code for Design of Building Foundation GB50007-2002 came into force on April 1, 2002, and Code for Design of Building Foundation GB7-89 was repealed on December 31, 2002.