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Device and method for measuring side resistance and end resistance of expansion pile in coral sand foundation

A measuring device, coral sand technology, applied in the direction of infrastructure engineering, infrastructure testing, construction, etc., to achieve the effect of accurate measurement results and enhanced binding force

Pending Publication Date: 2022-04-29
CHINA THREE GORGES UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no simulator for measuring the lateral and end resistance of expansion piles in coral sand foundations

Method used

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  • Device and method for measuring side resistance and end resistance of expansion pile in coral sand foundation
  • Device and method for measuring side resistance and end resistance of expansion pile in coral sand foundation
  • Device and method for measuring side resistance and end resistance of expansion pile in coral sand foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preferred solution is as Figure 1 to Figure 6 As shown, a device for measuring side resistance and end resistance of expansion piles in a coral sand foundation includes a measuring cylinder 7, a hollow bracket 6 and a dial indicator 8; A hole is provided, and a sealing plate 4 is detachably arranged at the hole, and the measuring cylinder 7 is used to hold coral sand, and the hole is used to insert the reserved pipe 10, and the space reserved by the reserved pipe 10 is used for pouring expansion cement mortar; The outside of the measuring cylinder 7 is detachably provided with a beam force frame 5, and the upper or lower end of the measuring cylinder 7 is matched with a hydraulic jack; the upper part of the measuring cylinder 7 is provided with a counter force frame 1, and the hollow bracket 6 is used to be placed on or above the measuring cylinder 7. Below, the dial indicator 8 is used to detect the displacement of the expansion pile. The present invention can no...

Embodiment 2

[0044] like figure 1 As shown, the lateral resistance measuring method of the expansion pile lateral resistance and end resistance measuring device in the coral sand foundation comprises the following steps:

[0045] Step 1: Install the sealing plate 4 at the lower end of the measuring cylinder 7, insert the reserved tube 10 into the hole at the upper end of the measuring cylinder 7, and fully extend the reserved tube 10 into the bottom of the measuring cylinder 7, fill the measuring cylinder 7 with coral sand, The height filled by coral sand is H;

[0046] Step 2: Pour expansion cement mortar into the reserved pipe 10, pull out the reserved pipe 10 after the pouring is completed, and the grouting height is not less than H;

[0047] Step 3: After the expansion cement mortar is solidified into the expansion pile 9, conduct a side resistance test:

[0048] Place the measuring cylinder 7 on the hollow support 6, place the hydraulic jack on the bottom of the measuring cylinder 7...

Embodiment 3

[0052] like Figure 5 As shown, the end resistance measuring method of the expansion pile side resistance and end resistance measuring device in the coral sand foundation comprises the following steps:

[0053] Step 1, carry out side resistance measurement:

[0054] Install the sealing plate 4 at the lower end of the measuring cylinder 7, insert the reserved tube 10 from the hole at the upper end of the measuring cylinder 7, and fully extend the reserved tube 10 into the bottom of the measuring cylinder 7, and fill the measuring cylinder 7 with coral sand. The filling height is H;

[0055] Fill the reserved pipe 10 with expansion cement mortar, and pull out the reserved pipe 10 after the pouring is completed, and the grouting height is not less than H;

[0056] After the expansion cement mortar solidifies into the expansion pile 9, carry out the side resistance test:

[0057] Place the measuring cylinder 7 on the hollow support 6, place the hydraulic jack on the bottom of t...

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Abstract

The invention discloses a device and method for measuring side resistance and end resistance of an expansion pile in a coral sand foundation. The device comprises a measuring cylinder, a hollow bracket and a dial indicator, cover bodies are arranged at the upper end and the lower end of the measuring cylinder, holes are formed in the middles of the cover bodies, sealing plates are detachably arranged at the holes, the measuring cylinder is used for containing coral sand, reserved pipes are inserted into the holes, and space reserved by the reserved pipes is used for pouring expansive cement mortar; a force restraining frame is detachably arranged outside the measuring cylinder, and the upper end or the lower end of the measuring cylinder is matched with the hydraulic jack; a reaction frame is arranged above the measuring cylinder, the hollow support is used for being placed above or below the measuring cylinder, and the dial indicator is used for detecting displacement of the expansion pile. The coral island reef environment is simulated, the side resistance and the end resistance are measured, and the variables are controlled, so that the measurement result is more accurate and closer to the actual environment, the test is more accurate, and the research on the characteristics of the expansion pile in the coral sand is facilitated.

Description

technical field [0001] The invention belongs to the technical field of measuring side resistance and end resistance of expansion piles in coral sand foundations, in particular to a device and method for measuring side resistance and end resistance of expansion piles in coral sand foundations. Background technique [0002] With the development of science and economy in recent years, the construction of coral islands is not only related to economic development but also related to military affairs. Coral sand foundation is the foundation of coral sand engineering, and the stability of coral sand foundation plays an important role in the long-term stability and safety of engineering structures. However, because the coral sand particles will be broken under the action of a small stress, whether it is a driven pile or a cast-in-place pile, there will be calcareous sand particle breakage around the pile, stress relaxation, pile side friction resistance and pile failure after pile f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 刘杰孙涛严李琪程怡君郭东王建平王昊坤王曦
Owner CHINA THREE GORGES UNIV
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