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.
Details >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
Details >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
Details >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.
Details >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.
Details >Progress management: a group of steel braces into the stage of demolition
A group of steel supports at the site of Huzhou Inner Ring (Northern Line) Rapid Transformation Project No.2 (referred to as "Huzhou Inner Ring North Line Rapid Transformation Project") are being dismantled. Huzhou Inner Ring North rapid transformation project under the full length of the tunnel1244mIn total, nearly ten thousand tons of steel support should be installed. The project has a large amount of engineering and a long construction period (expected to be one year). At present, there are8The steel support of each plate (total required32Has completed the construction, among which1The concrete construction of each plate has been completed, and the steel support has been removed. Other plates are being built with a first layer of steel support.
Details >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.
Details >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.
Details >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.
Details >Shanghai Strong Foundation presents women employees with Women's Day gifts
The annual International Women's Day comes in March, when everything begins. The UNION OF Shanghai QIANGQIANG FOUNDATION ENGINEERING CO., LTD WOULD LIKE TO PRESENT HOLIDAY GIFTS AND BEST WISHES TO ALL THE WOMEN WHO WORK HARD IN VARIOUS POSITIONS, WISHING THEM A HAPPY WOMEN'S DAY, career progress and happiness.
Details >Hong Kong airport is the biggest challenges facing the third runway construction aspect, before the project starts, sea DCM (mixing pile), land DCM (mixing pile), PVD (drain) in the sea, land gravel pile foundation treatment technology such as are for Japan, South Korea, the monopoly of international advanced technology, before and after the tender, the foreign counterparts enterprises of our country executes strict technology blockade. For this reason, the strong foundation has carried on the thorough research. After more than two years of continuous fighting day and night, countless scientific research, testing and adjustment, we have overcome the difficulties of equipment manufacturing and construction technology of PVD (drainage board) engineering ship, DCM (mixing pile) engineering ship, onshore gravel pile machine, and onshore DCM pile machine, and successfully mastered the core technology.