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Soft soil foundation embankment structure

A technology for soft soil foundations and embankments, which can be used in basic structure engineering, embankments, water conservancy projects, etc., and can solve problems such as overall instability of embankments, destruction of soil balance, and low cohesion

Inactive Publication Date: 2020-08-07
浙江广川工程咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For some widely distributed soft soil foundation areas dominated by silt and silty clay, the main physical and mechanical indicators of the foundation soil such as internal friction angle and cohesion are low. If the upper load is increased by embankment, it is easy to destroy the soil balance. state, the overall instability of the embankment occurs, causing damage to the embankment
[0003] Conventional engineering measures such as reducing the comprehensive slope ratio and setting up suppression platforms are suitable for rivers with wide riverbeds and large embankment spaces. In order to increase the safety factor, the anti-slide piles need to be driven into the embankment foundation in the form of close-packed piles, and the construction period is longer and the cost is higher.

Method used

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  • Soft soil foundation embankment structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment one: if figure 1 As shown, it is a kind of soft ground embankment structure disclosed by the present invention, and it is arranged along the water bank, including pile foundation 1 arranged in the embankment soil layer, and the number of pile foundation 1 piles is one row or more rows, wherein In the present embodiment, the quantity of one pile of the pile foundation is two rows.

[0034] Further, the pile foundation 1 is Extruded piles or end-bearing piles, the pile length is 20m, and the upper end of the pile foundation 1 is poured integrally to form a foundation cap 2 with a thickness of C30600mm. The width of the foundation cap 2 is 2240mm, and the foundation cap 2 is embedded in the soil layer.

[0035] A grouting stone retaining wall 3 is arranged along the water bank, a C20 concrete topping 4 is arranged at the upper end of the retaining wall 3 , and a C25 concrete bottom plate 5 is arranged at the lower end of the retaining wall 3 . In addition, th...

Embodiment 2

[0044] Embodiment two: if Figure 4 As shown, a soft soil foundation dike structure differs from the second embodiment in that a clay anti-seepage layer 14 is provided on the upper surface of the foundation cap 2 away from the water source. And, on the upper surface of the stone slag backfill layer 8, a embankment crest bearing layer 15 is also arranged, and the embankment crest bearing layer 15 can be a road layer for passing, while the clay anti-seepage layer 14 connects the embankment crest bearing plate and the foundation bearing up and down. station 2.

[0045]The gravel backfill layer 8 is used as the soil layer above the foundation cap 2 because the soil layer is relatively stable, so it is also difficult to deform when the gravel backfill layer 8 is subject to a larger load. But the porosity of the gravel backfill layer 8 is higher, and the water permeability is stronger, so when the water level overflows to the gravel backfill layer 8, water easily diffuses to the re...

Embodiment 3

[0046] Embodiment three: as Figure 5 , 6 As shown, a soft soil foundation dike structure differs from the second embodiment in that a cement mixing pile 16 is provided in the silty clay anti-seepage layer 10 below the riprap foot guard 7 . The cement stirring piles 16 are cylindrical, and a plurality of cement stirring piles 16 are distributed in an array.

[0047] Depend on figure 2 , 3 It can be seen from the force analysis curve in the figure that the first embodiment solves the problem that the upper and lower soil layers of the foundation cap 2 are loaded, causing the soil to become unstable, which in turn leads to the overall sliding and destruction of the embankment. Although this problem is solved by setting the foundation cap 2 and the pile foundation 1 to unload the load above the foundation cap 2, thereby avoiding the direct stress of the weak soil layer below the foundation cap 2.

[0048] Such as Figure 6 It can be seen from the force analysis curve in Fig...

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Abstract

The invention relates to a soft soil foundation embankment structure. The structure is arranged at a lower part of a river embankment, and comprises a pile foundation arranged in a soil layer of an embankment foundation, one or more rows of piles are mounted in the pile foundation, an upper end of the pile foundation is provided with a foundation platform, the foundation platform is buried in thesoil layer, the pile foundation and the foundation platform both are arranged along the embankment. The soft soil foundation embankment structure has the advantages that the foundation platform and the pile foundation are buried in the embankment soil layer to be used as stressed components, a load above the foundation platform can only be transferred to a deep soil layer through the foundation platform and the pile foundation, and the deep soil layer is taken as a supporting layer to support the pile foundation and the load supported by the upper part of the pile foundation. Thus, the foundation platform unloads the load on the upper part thereof, and an instability phenomenon caused by damage to a soil balance condition when the embankment foundation supports excessive load is avoided.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation treatment, in particular to a soft soil foundation embankment structure. Background technique [0002] For some widely distributed soft soil foundation areas dominated by silt and silty clay, the main physical and mechanical indicators of the foundation soil such as internal friction angle and cohesion are low. If the upper load is increased by embankment, it is easy to destroy the soil balance. state, the overall instability of the embankment occurs, resulting in damage to the embankment. [0003] Conventional engineering measures such as reducing the comprehensive slope ratio and setting up suppression platforms are suitable for rivers with wide riverbeds and large embankment spaces. In order to increase the safety factor, the anti-sliding piles need to be driven into the embankment foundation in the form of close-packed piles, and the construction period is longer and the cost is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/10E02D27/14E02D27/40E02D27/52E02D5/46E02B3/16E02B3/12
CPCE02B3/10E02B3/12E02B3/16E02D5/46E02D27/14E02D27/40
Inventor 胡淼吴文华夏庆云翁湛彭渊陈皓王坤雪兰立伟刘洪庆朱昆
Owner 浙江广川工程咨询有限公司
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