Composite-pile-cement-soil-pile partitioned composite foundation

Abstract

The invention discloses a composite-pile / cement-soil-pile partitioned composite foundation. The composite-pile / cement-soil-pile partitioned composite foundation comprises outer side piles and inner side piles. The region with the outer side piles and the inner side piles is the region where an embankment covers. The distance between the edges of the side slopes of the embankment and the center line of the width of the cross section of the embankment is A. The region is the region extending to the position of 1 / 5-3 / 4 A in the direction from the side slopes, on the two sides, of the embankment to the center line of the width of the cross section of the embankment. The residual region is the arrangement region of the inner side piles. The composite piles with the large pile intervals are adopted as the outer side piles, and the soil cement piles with the relatively-small pile intervals are adopted as the inner side piles. The composite-pile-cement-soil-pile partitioned composite foundation solves the problems that outer side pile bodies of a traditional cement soil pile composite foundation are likely to generate brittle rupture under the large bending moment, consequently inner side pile bodies sequentially generate brittle rupture, and the stability of the embankment is lost, and the bearing capacity is lowered greatly. The composite-pile / cement-soil-pile partitioned composite foundation has the beneficial effects that the construction is simple, the total sedimentation control effect is good, the compression resistance and bending capacity of the outer side pile bodies can be fully used, the safety is high, the applicability is high, and the economy is good.

Description

technical field [0001] The invention relates to a partition combined composite foundation which adopts composite piles and cement-soil piles mixedly, and belongs to the field of civil engineering foundations. Background technique [0002] In recent years, with the rapid development of my country's high-speed railway construction, higher requirements have been put forward for the construction speed of embankments and settlement control. In my country's coastal areas, the upper soil is mostly saturated soft clay, which has low shear resistance and poor drainage capacity, so the embankment is prone to instability and damage. In order to meet the requirements of rapid construction and settlement control, rigid piles and semi-rigid pile composite foundations have been more and more widely used. Cement-soil piles have the characteristics of high compressive bearing capacity, low cost, and fast construction speed, and are very suitable for engineering applications. Wide, but its v...

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Problems solved by technology

[0005] Aiming at the defects existing in the prior art, the present invention provides a composite pile-cement-soil pile partition composite foundation, which solves the problem that the outer pile body of the traditional cement-soil composite foundation is prone to brittle fracture under a large bending moment, resulting in inner The brittle fractures of the piles occur sequentially, which leads to the instability of the embankment and the greatly reduced bearing capacity. At the same time, it solves the problem of high cost and uneconomical when reinforced concrete piles or composite piles are used for embankment treatment, and the method of equally spaced piles is adopted When the road surface is unevenly settled and the total settlement control effect is poor, the compressive and bending bearing capacity of the outer pile body cannot be fully utilized.

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