Anti-side pier combined enclosure structure in excavation of large-scale foundation pit
A kind of envelope structure and large-scale technology, applied in the direction of infrastructure engineering, excavation, construction, etc., can solve the problems of difficult displacement control, difficult construction, high cost, etc., achieve low cost, reduce project cost, and enhance lateral resistance Effect
Active Publication Date: 2019-01-01
HANGZHOU NANLIAN CIVIL ENG TECH +1
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Problems solved by technology
[0005] The invention provides an anti-side pier combined enclosure structure suitable for large-scale excavation of foundation pits, which solves the problems of high cost, difficult construction, Displacement control is difficult, low reliability and other issues
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Embodiment 1
[0040] Such as Figure 1-2 As shown, a combined enclosure structure of anti-side pier in the excavation of a large-scale foundation pit, anti-side pier 1 is arranged at intervals along the periphery of the foundation pit enclosure, and anti-side pier 1 is built with anti-side pier The enclosure pile 2 and the side-resistant enclosure pile 2 are connected with each anti-side pier body 1 by the bar-shaped top beam 3 on the top of the pile to form a complete anti-side pier combined enclosure structure.
[0041] The anti-side enclosure piles 2 are prefabricated reinforced concrete round piles arranged in a single row, and a soil-retaining and water-stopping curtain 7 is arranged on the outside.
[0042] The distance between the anti-side piers 1 is comprehensively selected according to the excavation depth of the foundation pit, the soil of the excavation range of the foundation pit, and the structural form of the top beam 3, and the value ranges from 10 to 50m.
[0043] The anti...
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The invention discloses a lateral-force-resisting pier body combined-type fender structure in large-area pit excavation. Lateral-force-resisting pier bodies are arranged at intervals around the fender of a pit. The surrounding area of the large-area pit is divided into a plurality of small areas. Lateral-force resisting fender piles are arranged among the lateral-force-resisting pier bodies. The lateral-force-resisting pier bodies are connected by using the capping beams of the fender piles to form the intact lateral-force-resisting pier body combined-type fender structure. The lateral-force-resisting pier body combined-type fender structure has the beneficial effects that since diagonal piles are used for supporting the lateral-force-resisting pier bodies, the pit fender structure can avoid to use conventional inner supports which are high in manufacturing cost, the underground engineering construction is greatly facilitated and the problem that the reliability of anchor rods used in soft soil is poor or the construction cannot be implemented as the anchor rods exceed a red line is solved; the lateral-force-resisting pier body combined-type fender structure has the advantages that the lateral force resisting capacity is strong, the lateral displacement is well controlled, the fender safety and reliability are high, the manufacturing cost is low, the underground engineering construction can be performed without using the inner supports, and the like.
Description
technical field [0001] The invention relates to an anti-side pier combined enclosure structure in the excavation of a large-scale foundation pit, in particular to an anti-side pier combined enclosure structure. Background technique [0002] With the development of urban construction, underground projects such as super-large underground garages and underground shopping malls have sprung up. The excavation and enclosure of these large-scale underground projects cannot be provided with inner supports due to their large scale. Generally, only self-supporting enclosures can be adopted. The construction method of the central island with temporary diagonal braces may adopt enclosure forms such as soil nails and anchors, but these enclosure methods have problems such as high cost, troublesome construction, and soil nails and anchors exceeding the red line. [0003] At the same time, for the soft soil foundations of vast coastal cities, the above-mentioned method also has problems su...
Claims
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IPC IPC(8): E02D17/04
Inventor 严平
Owner HANGZHOU NANLIAN CIVIL ENG TECH