Pile body variable concrete strength grade cast-in-place pile and strength grade determining method thereof

A technology of concrete strength and determination method, which is applied in sheet pile wall, special data processing application, geometric CAD, etc. Effect

Active Publication Date: 2020-12-01
CHINA NORTHWEST ARCHITECTURE DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the pile top position, the pile axial force is the largest, which is the sum of the pile side resistance and the end resistance, and the material of the pile body is fully utilized; at the pile bottom position, the pile axial force is the smallest, which is only the pile end resistance, and the utilization rate of the pile body material is low

Method used

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  • Pile body variable concrete strength grade cast-in-place pile and strength grade determining method thereof
  • Pile body variable concrete strength grade cast-in-place pile and strength grade determining method thereof
  • Pile body variable concrete strength grade cast-in-place pile and strength grade determining method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] In this embodiment, the pile length is 50m and the pile diameter is 800mm pile body variable concrete strength grade cast-in-situ pile as an example, see 1, the concrete strength grade determination method of concrete pile body variable concrete strength grade cast-in-place pile is realized by the following steps:

[0099] 1) Collect the soil layer parameters of the construction area according to the common method as shown in the following table:

[0100]

[0101]

[0102] 2) According to the total length of the pile, determine the number of sections of the pile body z=3, and the length of each section is 16.7m; 3) Calculate the concrete compressive strength at each section of the cast-in-situ pile by the following formula;

[0103]

[0104] (3.1) Calculated from the top of the pile, the concrete strength grade of the first pile body 1:

[0105]

[0106] Calculated from the top of the pile, the concrete strength grade of 1 / 3 of the long pile body adopts C45....

Embodiment 2

[0115] In this embodiment, the pile length is 30m, and the pile diameter is 600mm. The pile body becomes the concrete strength grade cast-in-situ pile as an example. Refer to 2. The concrete strength grade determination method of the pile body becomes the concrete strength grade cast-in-place pile, which is realized by the following steps:

[0116] 1) Collect the soil layer parameters of the construction area according to the common method as shown in the following table:

[0117]

[0118]

[0119] 2) According to the total length of the pile, the number of sections of the pile body z=2 is determined, and the length of each section is 15m;

[0120] 3) Calculate the concrete compressive strength at each section of the cast-in-place pile by the following formula;

[0121]

[0122] (3.1) Calculated from the top of the pile, the concrete strength grade of the first pile body 1:

[0123]

[0124] Calculated from the top of the pile, the concrete strength grade of the p...

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Abstract

The invention relates to a pile body variable concrete strength grade cast-in-place pile and a strength grade determining method thereof, and belongs to the technical field of building design and construction. A pile body of the pile body variable concrete strength grade cast-in-place pile is divided into z sections from top to bottom, z is greater than 1 and less than 4, joint bars are arranged at the joints of all the sections, and the concrete compressive strength of the tops of all the sections of the pile meets the following formula: the mechanical property of materials can be brought into full play according to the change of the internal force of the pile body, and therefore the purposes of saving energy and materials and reducing the construction cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of architectural design and construction, and in particular relates to a cast-in-place pile with a pile body variable concrete strength grade and a method for determining the strength grade thereof. Background technique [0002] High-rise and super-high-rise buildings have large foundation reaction forces, and poor soil quality in soft soil areas usually require the use of pile foundations. Pile foundations have high bearing capacity, mature construction technology, and are widely used. The pile length is generally longer, and for super high-rise buildings, the pile length is often greater than 50m, even up to 100m. Concrete strength grades are generally C40, C45, C50 and C55, and the concrete has high strength and large dosage. [0003] Ordinary reinforced concrete cast-in-situ piles adopt one concrete strength grade for the entire pile length. For friction cast-in-situ piles, the characteristic value of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34G06F30/13
CPCE02D5/34G06F30/13
Inventor 刘锋贾俊明李丹莎吴琨陶倍林龙婷马牧
Owner CHINA NORTHWEST ARCHITECTURE DESIGN & RES INST CO LTD
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