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Micro adjustable steel inner pile sleeved pile and construction method thereof

An adjustable, pile casing technology, used in sheet pile walls, infrastructure engineering, construction, etc., can solve problems such as foundation soil deformation, and achieve the effects of eliminating deformation, reliable quality, and high installation accuracy

Inactive Publication Date: 2017-10-24
LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a miniature adjustable steel inner pile casing pile to solve the problem of complex foundation soil deformation

Method used

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  • Micro adjustable steel inner pile sleeved pile and construction method thereof
  • Micro adjustable steel inner pile sleeved pile and construction method thereof
  • Micro adjustable steel inner pile sleeved pile and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Calculate the vertical bearing capacity of a single pile

[0044] According to the empirical relationship between the physical index of the soil and the bearing capacity parameters, the standard value of the ultimate bearing capacity of the single pile is determined;

[0045]

[0046] Qsk: total limit side resistance standard value,

[0047] Qpk: standard value of total limit end resistance,

[0048] qsik: standard value of limit lateral resistance of the i-th layer of soil on the pile side,

[0049] qpk: the standard value of resistance at the ultimate end of the pile,

[0050] Ψsi, ψp: Size effect coefficient of end resistance, see Table 2 for calculation;

[0051] U: Circumference of outer casing,

[0052] Quk: Vertical bearing capacity of a single pile,

[0053] Li: the thickness of the i-th layer of soil,

[0054] Ap: pile tip area.

[0055] Table 2

[0056] soil type

Cohesive soil Silt

sandy soil, gravel soil

Ψsi

(0.8 / D) 1...

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Abstract

The invention discloses a micro adjustable steel inner pile sleeved pile and a construction method thereof, belongs to the field of civil construction engineering, and solves the problem of complicated foundation soil deformation. The micro adjustable steel inner pile sleeved pile comprises an outer sleeve and an inner pile; the hollowed inner pipe is arranged in the outer sleeve; the outer sleeve and the inner pile are fixed through a positioning piece; and a fine adjustment screw rod is arranged at the top of the inner pile. The side friction force and the end resistance of the pile are separated by the outer sleeve; the outer sleeve bears the side friction resistance in foundation soil change, and dissipates harmful deformation caused by the changed side friction resistance; the inner pile provides the end resistance to provide needed stable bearing capacity to the flooring; and the micro adjustment screw rod can adjust micro ground deformation.

Description

technical field [0001] The invention belongs to the field of civil construction engineering, and in particular relates to a miniature adjustable steel inner pile casing pile. Background technique [0002] my country has a vast territory, complex engineering geology, expansive soil, saline soil, collapsible loess, and permafrost are widely distributed, and foundation soil diseases occur frequently, causing buildings to not be used normally. For this reason, the construction party spent a huge amount of money to deal with it, but the common foundation treatment methods were difficult to work, causing huge economic losses to the construction party. [0003] Comparison of traditional treatment methods: The treatment methods for foundation diseases mainly include cushion replacement method, dynamic compaction method, gravel pile, single-liquid silicification method and lye method, see Table 1: [0004] [0005] The purpose of controlling expansive soil, saline soil, collapsib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/60E02D5/66
CPCE02D5/60E02D5/665
Inventor 陈天镭柴清张杰
Owner LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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