Function and design requirements of foundation pit engineering
First, the function of foundation pit engineering, second, the design requirements of foundation pit engineering
Details >Characteristics of foundation pit engineering
The characteristics of foundation pit engineering: 1, foundation pit engineering is a comprehensive discipline in geotechnical engineering, 2, temporary and risky, 3, the regional difference of foundation pit engineering, 4, the environmental conditions around the foundation pit strict requirements
Details >Survey points of foundation pit engineering
Compared with the investigation of buildings, the investigation of foundation pit engineering has its own characteristics. With the excavation of the soil inside and outside the foundation pit, there will be stratum movement. Therefore, there are specific requirements for the scope and depth of investigation and geotechnical index test items.
Details >Construction and monitoring of bolt
A, bolt construction points: 1, drilling, 2, set up reinforcement or steel strand bundle, 3, grouting, 4, prestress tension; Two, bolt monitoring:
Details >Characteristics of reverse method in foundation pit engineering
The CHARACTERISTICS OF THE REVERSE METHOD IN FOUNDATION PIT ENGINEERING ARE AS FOLLOWS: 1. The FORWARD METHOD AND THE REVERSE METHOD; 2. The FOUNDATION PIT SUPPORTING STRUCTURE AND THE UNDERGROUND MAIN STRUCT-INTEGRATION; 3. Shorten THE WHOLE CONSTRUCTION PERIOD; 4
Details >The construction of undisturbed soil taking concrete cast-in-place pile with full protective simplicity adopts dual-power drill with built-in spiral blades to drill down and cut the soil to form the pile diameter. At the same time, the undisturbed soil in the protective simplicity is removed, and the concrete is inserted into the steel cage after being pressed and the protective simplicity is removed to form reinforced concrete piles.
Details >Protection measures for foundation pit
In order TO ensure the smooth construction of foundation pit engineering, the construction scheme should be formulated according to the relevant provisions of the design specification of foundation pit support, and the corresponding safety protection measures should be taken.
Details >Process flow of SMW construction pile
The main construction steps of SMW construction pile (cement soil mixing pile) are as follows: 1. Construction preparation; 2. Two, stirring pile construction; Three, insert H steel; 4. Pull out the H-beam
Details >Construction process of mud wall protection bored pile
Bored pile refers to the use of drilling machinery drilled out of the pile hole, and in the hole poured concrete (or first in the hole hanging steel cage) and into the pile.
Details >Hazards of long exposure of foundation pit
Foundation pit exposed for a long time, will cause to a certain depth of foundation pit excavation, subsoil swell up phenomena will be shown after the release of the pressure, rainfall or row to pit water leads to a pit soil softening, the palisade structure of passive resistance is reduced, so that the pit displacement of retaining structures and cause around the settlement and deformation of foundation pit, endanger the safety of the surrounding buildings and structures.
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.