Secondary pile splicing construction method and terrace structure thereof

Abstract

The invention belongs to the technical field of pile foundation structures, and provides a secondary pile splicing construction method and a terrace structure thereof. The construction method comprises the following steps: S1, constructing a first section of pile on a construction natural ground; S2, carrying out earthwork backfilling on the construction natural ground; S3, digging out a top pilehead of the first section of pile in the earthwork backfill layer; and S4 carrying out pile splicing construction of a second section of pile at the top pile head. According to the scheme, the construction method is simple and safe and is guaranteed, the construction period can be effectively shortened, the number of times of earthwork transferring is reduced, raised dust is reduced, and the construction method is beneficial to the ecological environment.

Description

technical field [0001] The invention relates to the technical field of pile foundation structures, in particular to a secondary pile connection construction method. Background technique [0002] At present, the height difference between the indoor and outdoor floors of industrial storage projects is generally about 1.3 meters, and the natural floor height on site is basically at or below the outdoor plus or minus zero. As an industrial storage project, the requirements for floor settlement and bearing capacity are high. When the soil layer cannot meet the floor bearing capacity and settlement requirements, it is necessary to add floor piles to increase the bearing capacity and reduce settlement. When the floor piles are excavated Due to the large depth, a pile driver must be used to travel to the backfill soil for construction, and the elevation of the top of the ground pile is higher than the natural ground, so earthwork backfill is required before the pile is pressed to me...

AI Technical Summary

Problems solved by technology

[0007] 1. The backfill is limited by the construction environment and operation methods, and the soil is difficult to stabilize in a short time

The thickness of the backfill is about 1.3 meters, and the progress of backfill is greatly affected by rainy weather; at the same time, the layered compaction thickness generally exceeds the specification requirements during actual backfill, and cannot meet the required compactness requirements; Requirements for piling, the backfill soil in this state is not conducive to the walking of the pile driver, and there is a risk of instability of the pile driver, which is easy to cause accidents;

[0008] 2. Reserve the pile top protective soil layer 13 and the pile driver working surface 26 (the pile top protective soil layer 13 refers to the pile head that has been constructed in consideration of not crushing the pile head during the pile driver walking process, and generally exceeds the pile top by more than 500; the working surface The backfill of 26 refers to the range of 5-6 meters outside the concrete retaining wall), but the earthwork of these two parts is redundant, and it needs to be transported abroad during the construction of the floor and road later, which increases the amount of backfill and unearthed invisibly, and increases Reduce the construction cost and affect the overall construction progress

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