Cement mixing pile for foundation treatment
Cement mixing pile is an effective method of soft soil foundation treatment, is the cement as the main agent of curing agent, the use of special deep mixing machinery drilling soil predetermined position, drilling at the same time, with high pressure equipment will spray cement into soil and stir fully, so that cement and soil a series of physical and chemical reactions, The soft soil is solidified to form a cement-soil pile with integrity, water stability and a certain strength. The reinforced soil, the soil between the columns and the columns constitute a composite foundation, so as to achieve the purpose of foundation reinforcement.
Details >Strong foundation - long auger bored pile
Long spiral drilling pressure filling pile technology is on the basis of long spiral drilling filling pile technology evolved, mainly USES the long spiral drill hole to the design elevation, using concrete pump concrete from the bottom of the drill bit pressure, pressure pouring concrete while the drills until the pile, and then use a special vibration device insert reinforcing cage a concrete pile, the form of reinforced concrete piles.
Details >Soil nailing wall foundation pit supporting technology
Soil nailing wall is a kind of in-situ soil reinforcement technology. A threaded steel bar is drilled into the in-situ slope of the side wall of the excavated soil, and grouting is performed along the full length of the hole to form a slender rod anchored in the soil, which is called soil nailing. Depending on the friction resistance between the soil and the soil, the soil is subjected to passive force when deformation occurs, and mainly bears the tensile force. With the layered excavation of the earth, the vertical and horizontal soil nail groups are formed on the slope, and then the reinforced concrete surface is sprayed on the surface of the slope body to make the surface layer......
Details >PC construction method pile foundation pit enclosure technology
The predecessor of PC construction pile is Larsen steel sheet pile. Because the section of Larsen steel sheet pile is too small, it needs multi-layer anchor structure in the deep foundation pit enclosure engineering, and the construction is difficult, affecting the construction period, so the PC construction pile came into being. PC construction pile is a combination of seamless steel pipe and larsen steel sheet pile, which can effectively improve the stiffness of section. It is suitable for deep foundation pit of 7~18m, and is widely used.
Details >Foundation treatment and reinforcement
Foundation treatment and reinforcement refers to when the bearing capacity of the soil layer is poor, or the upper load is too large, in order to improve the robustness and stability of the foundation to meet the requirements of the superstructure bearing capacity and deformation, the soil layer can be strengthened.
Details >Composite foundation treatment technology
Composite foundation is a kind of artificial foundation which is formed by the reinforcement or displacement of some soils. The ACTION MECHANISM OF COMPOSITE FOUNDATION: 1, PILE ACTION, 2, COMPACTION action, 3, ACCELERATED CONSOLIDATION action, 4, cushion action, 5, reinforcement action.
Details >Quality requirements and control measures for TRD pile construction
TRD pile construction quality requirements and control measures; 1. Construction quality measures of TRD construction method mixing pile; 2, construction of cold joint treatment; 3, ensure the foundation pit corner wall lap; 4. Ensure the strength and uniformity of pile body; 5. Quality inspection method
Details >TRD pile construction technology uses chainsaw cutter as the main tool to cut underground soil, and cement as the hardener to form a continuous wall of equal thickness underground. Then, H-shaped steel is inserted as the stress strengthening material according to the designed spacing before cement-soil hardening. After the cement-soil hardening, a composite retaining wall with certain stiffness and strength or only water stop is formed to form the overall foundation pit supporting system.
Details >Shallow foundation generally refers to the bad soil layer thickness is less than 5 meters of the foundation. Shallow foundation treatment methods are various, common are:
Details >Deep mixing technology of soil-cement in foundation pit support
Water in the foundation pit supporting of deep mixing method by high pressure jet grouting or mixing machinery, special machinery, deep in the ground to curing agent (cement or cement powder, plus certain admixture) and force on the mixing of foundation soil, hardening of the wholeness, water stability and forms after a certain strength of cement-soil pile or cement clod body, thus improve the strength of foundation, The method of enhancing its deformation modulus.
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.