Deep-foundation-pit pit-dividing construction rib wall support replacement structure and construction method thereof

Abstract

The invention discloses a deep-foundation-pit pit-dividing construction rib wall support replacement structure and a construction method thereof. Reinforced concrete support replacement shear walls with the thickness of 300 mm are arranged at elevation parts from a basement floor to a basement roof, the horizontal spacing and positioning spacing of the support replacement shear walls are determined according to foundation pit concrete supporting beams of an area II, and the support replacement shear walls are constructed with a basement structure, and connected with diaphragm walls and mid-partition walls through embedded steel bars. After rib wall support replacement is adopted, floorslabs in a basement of an area I are constructed, afterwards, two-layer earthwork of the adjacent area IIcan be excavated, the earthwork of the adjacent area can be excavated in advance, and then two pits are subjected to construction operations simultaneously. The construction technology of the deep-foundation-pit pit-dividing construction rib wall support replacement structure is the same as that of a permanent structure shear wall, and rib wall force transfer is reliable. The deep-foundation-pit pit-dividing construction rib wall support replacement structure is suitable for foundation pit engineering of foundation-pit pit-dividing excavation and back-construction.

Description

technical field [0001] The invention relates to the field of construction, in particular to a rib wall replacement structure for deep foundation pit sub-pit construction and a construction method thereof. Background technique [0002] With the process of urbanization in our country, the scale of foundation pit projects is getting larger and larger, the excavation depth is getting deeper and deeper, and the surrounding environment is becoming more and more complex. The excavation depth of the foundation pit has generally reached 20-30 meters, and the excavation area has reached 20,000-60,000 m 2 , based on the strict requirements of foundation pit deformation control, subways, pipelines and other units require the foundation pit to be separated, and the excavation and basement structure construction should be carried out in different areas, which puts forward higher requirements for the design and construction of the foundation pit enclosure; the surrounding environment of th...

AI Technical Summary

Problems solved by technology

After the rib wall is used to replace the braces, after the construction of the middle floor of the basement in Area I (such as: the floor of B2 floor), the earthwork of the second floor adjacent to Area II can be excavated, and the earthwork in the adjacent area can be excavated in advance, and then the two pits can be constructed at the same time , shorten the overall construction time of the foundation pit, reduce the "time-space effect" of the foundation pit project, protect the surrounding buildings (structures), and solve the problem of long construction period and large deformation of the foundation pit when the conventional construction method is used for the partitioned foundation pit. The surrounding environment has a greater impact, etc.

Images