The foundation encyclopedia-QiangJin Foundation-第27页

The foundation encyclopedia

: 18 Mar

Grade regulations for foundation pit engineering

1. The safety level of foundation pit engineering "Unified Standard for Engineering Post-Festival Reliability Design" GB50153-2008 stipulates that the engineering structure should be divided into different safety levels according to the different consequences of structural failure, reflecting the requirements of different reliability levels of structural design. The safety level of foundation pit should be determined according to the requirements.
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: 17 Mar

Type of retaining structure of foundation pit

First, the classification of foundation pit supporting structure: 1. Slope excavation, 2. Retaining support structure, 3. Gravity support structure, 4. Combined support structure; 2. Selection of supporting structure: The selection of supporting structure should be based on the geological conditions of the site, the depth and function of the foundation pit, construction conditions, environmental factors and regional engineering experience, etc., and comprehensively consider the following factors:
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: 16 Mar

Characteristics and design requirements of foundation pit engineering

Foundation pit engineering usually refers to the construction site to build a set of foundation pit supporting structure system, forming the construction enclosure of underground engineering (also known as foundation pit enclosure structure), in order to smoothly carry out earth excavation and underground engineering construction.
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: 15 Mar

Causes of uneven settlement of foundation

The CAUSES of uneven settlement of foundation are: 1, geological factors, 2, investigation factors, 3, design factors, 4, construction factors, 5, other factors
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: 14 Mar

How to deal with deflection of pile foundation

The deviation of pile foundation is usually caused by the poor soil quality or the large difference of soil quality. Deflection treatment of pile foundation can be generally adopted the following methods: 1, change the axis position, 2, pile position correction, 3, add ox leg, 4, pile group treatment, 5, in situ re-drilling, 6, push the top method (apply horizontal thrust at the top of the pile) to reset the pile
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: 13 Mar

Prestressed bolt and stiffened pile technology

Rock and soil bolt foundation is the foundation to bear tangential force or overturning moment. Generally, the construction technology such as prestressed bolt and rotary jet mixing stiffened pile anchor can be used.
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: 12 Mar

FDP fast soft foundation treatment

FDP fast soft foundation treatment technology is a soft foundation treatment technology based on the principle of vacuum preloading technology and a number of innovative technologies. It is a set of unimpeded drainage plate technology (Flow), straight and sand free mat technology (Direct)& NBSP; , intermittent charging technology (Pressurize) and vacuum energy saving technology (Powerless) in the integration of vacuum preloading & have spent (Preloading) technology.
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: 10 Mar

High pressure rotary jet grouting pile technology

High-pressure jet grouting pile is a kind of high-pressure jet grouting method. The grouting pipe with special nozzle is inserted into the designed soil depth, and then the cement slurry is shot out of the nozzle in the form of high-pressure jet to impact and cut the soil. The soil and cement slurry are stirred to form a mixed slurry, which then forms a continuous lap cement plus solid.
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: 10 Mar

Selection basis of retaining pile types for foundation pit

There are many types of retaining piles for foundation pit, and each type has its own applicable conditions. The selection of retaining pile types is mainly based on :(1) excavation depth of foundation pit and surrounding environment; (2) the surface area and construction period of the foundation pit; (3) The influence degree of the construction process of retaining pile on the surrounding environment and the disturbance degree of the construction process of retaining pile of foundation pit that the surrounding environment can withstand.
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: 09 Mar

What kind of foundation pit needs to be supported?

When the foundation pit has one of the following characteristics, it needs to be supported :(1) the buildings around the foundation pit are close to the excavation edge of the foundation pit, and the stratum is relatively weak; (2) The surrounding buildings are sensitive to excavation and disturbance; (3) When the excavation depth of the foundation pit is greater than 3 meters, and the vertical retaining structure resisters the deformation caused by the load outside the foundation pit and damages the adjacent buildings and structures, it is necessary to set supports to control the deformation of the foundation pit during the excavation process, so as to ensure the safety of the foundation pit and surrounding environment.
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Shanghai QiangJin Foundation Engineering Co., Ltd.

Tel:400-100-2850

Address:No. 289, Huixian Road, Jiading District, Shanghai

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