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Corrosion resistant concrete pile used in ultracholrine saline soil, its manufacturing and construction

A technology of corrosion-resistant concrete and concrete piles, which is applied in the direction of manufacturing tools, sheet pile walls, foundation structure engineering, etc., can solve problems such as the durability of pile foundations, achieve a simple manufacturing process and construction process, and is conducive to large-scale use , the effect of strength enhancement

Inactive Publication Date: 2014-07-30
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the durability problem of pile foundations in hyperchlorine saline soil areas, the invention provides a corrosion-resistant concrete pile used in hyperchlorine saline soils and its manufacturing and construction methods

Method used

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  • Corrosion resistant concrete pile used in ultracholrine saline soil, its manufacturing and construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In a saline soil area, concrete prefabricated piles are used to enhance the bearing capacity of the foundation. According to the engineering survey report, the salt content of saline soil is 12.136%, and the main salt or ion content is Ca 2+ : 2.57%, Mg 2+ : 0.098%, K + and Na + : 3.4%, SO 4 2- : 1.67%, Cl - : 4.297%, HCO 3 - : 0.1%, CO 32- : 0.001%. The application environment of the corrosion-resistant concrete pile provided by the invention is satisfied.

[0029] The cementitious material concrete is prepared according to the raw materials in parts by weight of the following components:

[0030] Lightly burned magnesia powder: 200 parts;

[0031] Magnesium chloride: 45 parts;

[0032] Coarse aggregate: 575 parts;

[0033] Fine aggregate: 200 parts;

[0034] Water: 90 parts.

[0035] Reinforced concrete prefabricated piles are used, the designed piles are 8m long, and the section is 30cm×30cm. CFRP rods are used as concrete bars, which are manufactured ...

Embodiment 2

[0040] In a saline soil area, concrete prefabricated piles with a length of 16m and a section of 50cm×50cm are used to enhance the bearing capacity of the foundation. The engineering investigation report shows that the salt content of saline soil: 24.07%, the main salt or ion content: Ca 2+ : 1.18%, Mg 2+ : 3.86%, K + 、Na + : 7.0%, SO 4 2- : 2.45%, Cl - : 8.21%, HCO 3 - : 1.17%, CO 3 2- : 0.2%.

[0041] The corrosion-resistant concrete prefabricated pile used in superchlorinated saline soil according to the present invention uses aluminum alloy bars as concrete reinforcing bars. The concrete is calculated in parts by weight and is prepared from the raw materials of the following components:

[0042] Lightly burned magnesia powder: 300 parts;

[0043] Magnesium chloride: 70 parts;

[0044] Coarse aggregate: 400 parts;

[0045] Fine aggregate: 450 parts;

[0046] Water: 180 parts.

[0047] According to a kind of manufacturing process method of corrosion-resistant...

Embodiment 3

[0053] In a saline soil area, plain concrete pouring piles are used to enhance the bearing capacity of the foundation. The designed pile length is 12m and the pile diameter is 38cm. The engineering survey report shows that the salt content of saline soil: 44.0%, the main salt or ion content: Ca 2+ : 2.82%, Mg 2+ : 3.86%, K + 、Na + : 14.7%, SO 4 2- : 4.3%, Cl - : 16.64%, HCO 3 - : 1.08%, CO 3 2- : 0.6%. The construction conditions of the corrosion-resistant concrete pile provided by the invention are satisfied.

[0054] The corrosion-resistant concrete cast-in-situ pile used in superchlorine saline soil according to the present invention is plain concrete cast-in-place pile. The concrete is calculated in parts by weight and is prepared from the raw materials of the following components:

[0055] Lightly burned magnesia powder: 650 parts;

[0056] Magnesium chloride: 200 parts;

[0057] Coarse aggregate: 1500 parts;

[0058] Fine aggregate: 900 parts;

[0059] Wa...

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Abstract

The invention discloses a corrosion resistant concrete pile used in ultracholrine saline soil, and its manufacturing as well as construction technologies. The base material of the concrete pile comprises a cementing material obtained by mixing magnesium oxide and magnesium chloride in certain proportion, coarse aggregate and fine aggregate, etc. The magnesium oxide-magnesium chloride system in the concrete pile can react with certain salt of specific kind and content in the ultracholrine saline soil with a specific salt content, thus maintaining the strength of the concrete pile in the ultracholrine saline soil. Utilization of the concrete pile can solve the problems of poor corrosion resistance and weak durability in ordinary concrete piles of ultracholrine saline soil areas.

Description

technical field [0001] The invention belongs to the field of civil engineering and relates to the technical field of pile body design and construction in foundation engineering, in particular to a corrosion-resistant concrete pile used in hyperchlorinated saline soil and its production and construction process. Background technique [0002] The salt content of the hyperchlorinated saline soil in the western inland is as high as 5-44%, which is 5-10 times that of the eastern coastal saline soil. See reference [1]: Yu Hongfa. The durability, mechanism and Service life prediction method [D]. Nanjing: Southeast University, 2004. The salt content is mainly chloride, sulfate and carbonate of potassium, sodium, magnesium and calcium. The durability of concrete structures poses a serious threat. Concrete and reinforced concrete pile foundations are the most commonly used foundation forms of buildings (structures), but their application is greatly restricted in hyperchlorinated sali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/32E02D27/32B28B23/18E02D5/34
Inventor 于浩刘庆伟邓晓轩程寅黄新
Owner BEIHANG UNIV