Multi-row ultra-deep oblique composite anchor pile for narrow space

Abstract

The invention discloses multi-row ultradeep inclined compound anchor rod piles for narrow space. Each compound anchor rod pile comprises an anchor rod main body structure (1) and a pulp cementing body(2); pulp cementing materials (2) are filled around the anchor rod main body structures (1); the anchor rod main body structures (1) comprise multiple anchor rods (4), connecting pieces (5) and limiting fixed pieces (6); the anchor rods (4) comprise upper sections (9) and lower sections (10), which are the same in length and connected through threads; multiple grouting holes are uniformly distributed in the peripheries of the upper sections (9); sealing anchor structures (11) are arranged at the upper ends of the upper sections (9); pile holes (3) of the compound anchor rod piles are small intop and big in bottom; and the bottom sections of the pile holes (3) are cross. The anchor rod piles are simple in structure, reasonable in design, convenient to construct and excellent in use effect, can effectively support metro station foundation pits, and are more suitable for special construction environments with narrow space such as deep foundation pits.

Description

technical field [0001] The invention belongs to the rail transit equipment industry, and relates to the technical field of underground structure engineering construction of urban rail transit vehicles, in particular to a multi-row ultra-deep oblique composite anchor pile for narrow spaces. Background technique [0002] With the continuous improvement of economic strength, in order to alleviate the growing traffic pressure, the construction of subways is booming in many urban constructions. Restricted by various factors, subway construction inevitably needs to be adjacent to or pass through various structures, and the construction of these node areas often becomes the top priority of engineering construction. The construction of the foundation pit enclosure structure of the main body of the subway station and ancillary works can only be carried out near the block, and often encounters a series of problems and difficulties, such as the narrow space, the inability to carry out ...

AI Technical Summary

Problems solved by technology

[0005] The current foundation pit support structure is relatively simple, and the support strength is not large enough. For foundation pits with large areas and deep depths, there will be safety hazards. Due to the thin support structure system, foundation pit collapses are prone to occur

Foundation pit support mainly includes row piles, underground diaphragm walls, steel sheet piles, cement-soil walls, SMW piles, etc. Some foundation pits with good geological conditions use composite soil nail walls. The above support methods can be applied to most foundation pits support, but it is helpless for deep foundation pits located in narrow plots between urban buildings

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