Method for constructing from central area to periphery of ultra-large type underground engineering
An underground engineering and construction method technology, applied in water conservancy projects, underwater structures, infrastructure engineering, etc., can solve the problems of construction progress, difficulty, increased risk, high support system cost, and expensive construction enclosure cost, etc., to achieve The effect of improving construction safety and reliability, saving project cost, and saving construction period
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Embodiment 1
[0036] Such as Figure 1-9 As shown, a construction method in which the central area of a super-large underground project is combined with the surrounding areas, the specific construction steps are as follows:
[0037] 1), construction foundation pit enclosure wall 6, engineering pile 7, support and trestle support pile 8;
[0038] 2) grading of the upper soil around the foundation pit or excavation of soil nailing wall enclosure, control deformation anchor rods under construction and support conditions, and pouring top beams;
[0039] 3) The central area is sloped and excavated to the bottom, and the basement floor 1 and the third underground floor 2 floor 4 structure of the central area are completed;
[0040] 4) Combining the surrounding conditions, the upward construction completes the structure of the second floor 3 underground in the central area, and at the same time, the beam slab 5 or beam structure of the second underground floor in the surrounding area is complete...
Embodiment 2
[0053] Such as Figure 10-18 As shown, a construction method in which the central area of a super-large underground project is first combined with the surrounding area, the surrounding support system is a temporary surrounding support 11 supported by reinforced concrete or steel, and the specific construction steps are as follows:
[0054] 2.1), step 1), 2) and 3) construction in embodiment 1, step 4) in construction central area underground two-story 3 floor slab structure, construction enclosing beam and peripheral support 11 simultaneously, make peripheral support 11 and underground two Floor slabs 4 are connected as a whole, and the setting height of peripheral support 11 should enable excavator and earth truck to drive normally to carry out excavation operation; then follow steps 5), 6) to carry out construction;
[0055] 2.2) In step 7), the trestle 9 is removed, and the basement floor 1 in the surrounding area and the floor structure of the third underground floor 2 a...
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