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Pile filling technology of large-diameter bagged concrete

A technology of concrete and cast-in-place piles, applied in sheet pile walls, protection devices, buildings, etc., can solve the problems of small bearing capacity and unsatisfactory anti-corrosion effect, achieve long life, solve corrosion damage, and reduce project cost

Active Publication Date: 2011-10-05
CCCC FIRST HIGHWAY CONSULTANTS +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention provides a large-diameter bagged concrete pouring pile technology to overcome the problems of unsatisfactory anti-corrosion effect and small bearing capacity of large-scale concrete structures in saline soil environment in the prior art

Method used

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  • Pile filling technology of large-diameter bagged concrete
  • Pile filling technology of large-diameter bagged concrete

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the drawings and embodiments.

[0028] See Figure 1, a large-diameter bagged concrete pouring pile technology, using conventional drilling technology to form a hole, after clearing the hole, a steel pipe with a diameter of about 1 / (10-15) in diameter is placed along the wall of the drilled hole in advance Use the bottom of the hole as the slurry discharge pipe 1, and then counterweight the anti-corrosion bag 2 and sink it into the brine cement slurry in the drill hole. After confirming that the anti-corrosion bag 2 is at the same depth as the drill hole, start to inject fresh water into the anti-corrosion bag 2 For mud or fresh water, use the drainage grouting method to discharge the brine cement slurry in the borehole through the grout discharge pipe 1; after the anticorrosion bag 2 is closely attached to the wall of the borehole, the sharp corners of the bottom are polished and the wrapped steel ...

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Abstract

The invention relates to the technical field of expressway construction works, in particular to a pile filling technology of large-diameter bagged concrete in a corrosive environment. The invention aims to solve the problems that a concrete construction with a large-size structure has poor corrosion preventing effect and small bearing force in a salinized soil environment by the prior art. The pile filling technology of the large-diameter bagged concrete comprises the following steps of: forming a hole by using a conventional dilling technology; using a steel tube as a slurry discharge pipe in advance after cleaning the hole; counterweighing and then sinking a corrosion preventing bag into brine slurry; injecting fresh water slurry or fresh water after determining the same depth of the corrosion preventing bag and the drilling hole; discharging the brine slurry in the drilling hole through the slurry discharge pipe by using a water-discharge and slurry-injecting method; and casting underwater concrete of a foundation pile until forming the pile by adopting a conventional drilling and pile filling process. The invention has the advantages of favorable adaptability, easy popularization and lower cost; the water-discharge and slurry-injecting method has strong operability; and the predictability of the service life of concrete foundation pile can be defined.

Description

Technical field: [0001] The invention relates to the technical field of expressway construction engineering, in particular to the technology of large-diameter bagged concrete pouring piles in a corrosive environment. Background technique: [0002] In the process of expressway construction, complex geological conditions are often encountered. For example, under the geological conditions of load + freeze-thaw + salt lake brine corrosion and the adsorption zone (Qarhan Salt Lake area) dry and wet alternately, due to multiple factors, for bridge foundation piles and pier columns, if reliable anti-corrosion measures are not taken for concrete structures Corrosion measures, severe corrosion will occur in 2 to 3 years, and pulverization will begin in about 3 years, which greatly shortens the overall life of the bridge and the safe operation of the road. [0003] Concrete anti-corrosion technology under corrosive environment has been widely valued in the fields of scientific resear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/34E02D5/60E02D31/00E02D31/06
Inventor 周纲黄明
Owner CCCC FIRST HIGHWAY CONSULTANTS
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