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Component for detecting strength of expanded pile and detection method

A component and body expansion technology, which is applied in the field of components for testing the strength of body expansion piles, can solve the problems of large engineering volume, high cost, and difficult control of the shear surface, and achieve the goal of ensuring stability, ensuring accuracy, and avoiding crushing Effect

Active Publication Date: 2021-09-24
周同和 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few methods for testing the bond strength and shear strength in the expanded pile. Now, for the detection of the bond strength between the core pile and the expanded pile, some use in-situ tests, which not only require a large amount of engineering, but also high cost
The determination of the detection strength between the expansion body and the soil is special, because the cross-sectional strength between the composite pile and the soil is not only affected by the infiltration of the cementitious material, but also has the influence of the normal stress, so that the cross-sectional strength between the expansion body and the soil Enhanced, when using a direct shear instrument, the shear plane is not easy to control, and it is a horizontal plane, and the shear strength will be different from that surrounded by the ring

Method used

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  • Component for detecting strength of expanded pile and detection method
  • Component for detecting strength of expanded pile and detection method
  • Component for detecting strength of expanded pile and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A component for detecting the strength of an expanded pile, the structure of which is as follows Figure 1-4 As shown, it includes a forming die, and also includes an upper member and a lower member matched with the forming die; the upper member is matched with the soil body 18, the upper member can detect the shear strength between the soil body 18 and the expansion body 17, and the lower member In cooperation with the core pile 16 and the expansion body 17 , the lower member can detect the bond strength between the core pile 16 and the expansion body 17 .

[0044] like figure 1 , image 3 As shown, the forming die comprises a horizontally arranged first annular plate 7, the outer casing of the first annular plate 7 is provided with a second annular plate 6 coaxial with it; the bottom end of the first annular plate 7 is provided with a third annular plate coaxial with it 23. The outer diameter of the third annular plate 23 is equal to the outer diameter of the second...

Embodiment 2

[0051] The above-mentioned detection method of the component for detecting the strength of the expanded body pile comprises the following steps:

[0052] Step 1, fill the expansion body 17 material in the support barrel 22 of the base, such as Figure 5 As shown, the third annular plate 23 of the forming die is placed on the support plate 20 of the base, so that the third annular plate 23 is coaxial with the through hole 21, and the hole in the middle of the first annular plate 7 is sealed.

[0053] step 2, as Figure 5-8 As shown in the figure, calculate the amount of filling, fill and compact between the outer cylinder 9 and the inner cylinder 8, determine the quality of the soil before filling, weigh, fill and compact in stages, and place the fourth annular plate 10 on the soil body Above 18; pour the material of the expansion body 17 into the outer cylinder 9, and lift the inner cylinder 8 upward at the same time, so that the bottom end of the inner cylinder 8 is always l...

Embodiment 3

[0061] The present embodiment is an experiment in which the detection method in the real-time example 2 is used to detect the bond strength of the expanded pile, and the process is as follows:

[0062] like Figure 11-15 As shown, the expansion pile is first made, according to the size limit of the testing equipment, such as Figure 11 As shown in the figure, a total of 5 prefabricated concrete core piles 16 with a diameter of 100mm and a height of 350mm were produced in this experiment, and 5 expansion bodies 17 with a height of 200mm and an outer diameter of 300mm were poured using these 5 core piles 16 The model of the pile; the material of the expanded body 17 of one expanded body pile is selected from cement and soil, the material of the expanded body 17 of the two expanded body piles is selected from C51 concrete, and the material of the expanded body 17 of the two expanded body piles is selected from broken brick- Glass-concrete, its 7-day and 28-day bonding properties...

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Abstract

The invention belongs to the technical field of expanded pile detection, and particularly discloses a component for detecting the strength of an expanded pile. The component comprises a forming die, and further comprises an upper component and a lower component which are matched with the forming die, wherein the upper component is matched with a soil body, and the lower component is matched with a core pile and an expanded body. The component for detecting the strength of the expanded pile is simple in structure and convenient to detect.

Description

technical field [0001] The invention belongs to the technical field of expanded body pile detection, and in particular relates to a component for detecting the strength of an expanded body pile. Background technique [0002] With the development of pile foundation engineering, the shape and construction form of the piles have undergone great changes. In the early days, the cast-in-place piles developed to the prefabricated piles, and later from the prefabricated piles to the combined form of piles. The new pile type is composed of prefabricated core pile and expanded body material. Due to the characteristics of each part of the expanded pile and the characteristics of the construction process, the bearing performance of the pile is greatly improved. Compared with the traditional cast-in-place pile, which has many quality problems, the construction quality of the expanded pile is more guaranteed and the construction efficiency is higher. However, there are few methods for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 周同和胡东朝
Owner 周同和
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