Long-span reinforced concrete inner support structure of rectangular deep foundation pit and construction method of structure
A reinforced concrete and support structure technology, which is applied in basic structure engineering, excavation, construction, etc., can solve the problems of difficulty in reaching the level of the foundation pit, vertical two-way force balance, and single support form, and achieves small deformation and convenient construction. , the effect is remarkable
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[0053] Example one
[0054] A large-span reinforced concrete inner support structure for a rectangular deep foundation pit, such as figure 1 As shown, the large-span reinforced concrete internal support structure of the rectangular deep foundation pit includes a retaining structure 7 on the side of the foundation pit, an internal support three-dimensional support structure including a steel support column 10, and a crown beam. The crown beam is an internal support three-dimensional The inner supporting three-dimensional supporting structure described by the ring beam at the top of the retaining structure at the top of the retaining structure and the side wall of the foundation pit has 2 layers, each layer includes the corner structure of the foundation pit, the symmetrical supporting structure in the middle of the foundation pit and the longitudinal Beam 6
[0055] The corner structure of the foundation pit includes a large diagonal brace 1 located at the corner of the foundation ...
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[0064] Example two
[0065] A method for constructing a large-span reinforced concrete inner support structure for a rectangular deep foundation pit. The construction process includes:
[0066] A. Overall preparation
[0067] First, the construction of the retaining structure 7 on the side of the foundation pit is carried out at the same time as the construction of the steel support column. The steel support column 10 is extended into the soil by means of bored piles, and the bottom 101 of the steel support column is anchored by concrete pouring (see image 3 , Image 6 ), when the strength of the anchored concrete at the bottom is sufficient, backfill and compact with earth; the retaining structure of the side wall of the foundation pit can be an underground continuous wall or a supporting row of piles or a steel sheet pile;
[0068] B. Carry out single-layer construction of internal support three-dimensional support structure
[0069] When the strength of the retaining structure of ...
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