A kind of long-term anti-pulling capacity indoor test method of fiber bar anti-float anchor rod

A kind of long-term anti-pulling capacity indoor test method of fiber bar anti-float anchor rod

  • CN 108,505,551 A
  • Filed: 04/28/2018
  • Published: 09/07/2018
  • Est. Priority Date: 04/28/2018
  • Status: Active Application
First Claim
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1. a kind of long-term anti-pulling capacity indoor test method of fiber bar anti-float anchor rod, it is characterised in that in fiber bar anti-float anchor rodIt is realized in long-term anti-pulling capacity progress indoor test device, detailed process is:

  • (1) lever load system is installed, is first fixed rigid base on rigid ground with earth anchor screw rod and earth anchor nut, thenFirst column and the second column are welded on rigid base, and increased respectively in the suspension column of the first column and the second column welding floorAdd its stability, when welding ensure the first column, the fusion length of the second column and floor and intensity and column verticality,Then lever is built, first uses first crossbeam fixing axle and third crossbeam fixing axle by first crossbeam and third crossbeam respectively with firstColumn and the connection of the second column, and build support temporarily and ensure that first crossbeam and third crossbeam are horizontal, then connected with first crossbeamExtension bar fixing axle, second cross beam connecting rod fixing axle, first crossbeam connecting rod and second cross beam connecting rod install second cross beam, finallyWith third crossbeam connecting rod fixing axle third crossbeam connecting rod is installed on third crossbeam, Huang need to be smeared when above-mentioned fixing axle is installedOil, and external support is added only to make the holding of third crossbeam horizontal, lever load system installs;

    (2) the fiber bar anti-float anchor rod body of rod is installed:

    The fiber bar for first taking root in low-temperature-sensitive mini optical fibre grating sensor string by twoThe anti-float anchor rod body of rod is each passed through the preformed hole of first crossbeam left end and second cross beam right end, then with high-strength nut, nut shimThe fiber bar anti-float anchor rod body of rod positioned at reserved hole site above section is sequentially passed through from top to bottom, by it in a manner of screw thread coupleIt securely fixes, to ensure anchorage length of the fiber bar anti-float anchor rod body of rod in concrete substrate before installation, anchorage length is by examinationIt tests requirement to determine, and ensure the verticality of the fiber bar anti-float anchor rod body of rod by rigid holder is oriented to, pay attention in whole installation processProtect low-temperature-sensitive mini optical fibre grating sensor without damage;

    (3) bottom plate anchor structure is formed:

    The first long 1.2m of insertion outer surface painting organic oil on the base threaded hole 24 of rigid base,The pvc pipe of diameter 5cm, is used in combination white glue band to seal the upper top surface of base threaded hole in order to avoid slurries flow into, then holder coagulation soil matrixThe template of body, assembling reinforcement, and ensure the relative position of concrete substrate and the fiber bar anti-float anchor rod body of rod, finally pour coagulationSoil makes standard specimen and conserves to age, and takes out pvc pipe to form bottom plate anchor structure before concrete final set;

    (4) first concrete substrate is fixed on rigid base with high-strength bolt and steel cushion block, with commercially available structure glue in fiberOn the muscle anti-float anchor rod body of rod paste the bar wing, the interim banding fixed of tied silk, maintenance is used in combination, wait for structure glue natural conditions maintenance 1 day it is completeTied silk is dismantled again after all solidstate, then sets up four automatic positions on the bar wing and concrete substrate respectively with movable clamping deviceAcquisition meter is moved, and automatic displacement acquisition meter is series-connected to external acquisition system with low-temperature-sensitive mini optical fibre grating sensorOn, the half of pre-applied first order capacity value, and initial reading is recorded, quickly test error caused by load is rejected, is then appliedAdd the clump weight weight needed for long duration load, starts to test;

    (5) reading data are surveyed, point different time sections and time point are observed experiment, permanent for a long time to obtain fiber bar anti-float anchor rodThe criterion that deflection under constant load, experiment Load-unload and termination loading environment and anchor pole destroy is pressed《

    Building foundation pit branchProtect technical regulation》

    (JGJ120-2012) it executes).

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