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A reaction device and field test method for roadbed flat plate load test

A technology of flat load and reaction device, which is applied in the direction of measuring devices, roads, track superstructures, etc. It can solve the problem that the normal operation of roadbed treatment vehicles and ballast unloading vehicles interferes greatly, and cannot adapt to the efficient operation process and on-site operation of roadbed treatment vehicles. Insufficient space and other problems, to achieve the effect of fast erection and transfer speed, small footprint, and space saving

Active Publication Date: 2020-07-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, the existing subgrade K 30 When the detection method is directly applied to the subgrade quality detection of the first section A and the second section B, due to problems such as insufficient on-site work space and difficulty in erecting the reaction device, the detection often takes a long time, and the roadbed treatment vehicle and ballast unloading The normal operation of the car is greatly disturbed
At the same time, the erection of the reaction frame (such as the ground anchor reaction frame) may even cause a certain degree of damage to the subgrade.
Therefore, traditional on-site testing methods cannot adapt to the efficient operation process of subgrade handling vehicles

Method used

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  • A reaction device and field test method for roadbed flat plate load test
  • A reaction device and field test method for roadbed flat plate load test
  • A reaction device and field test method for roadbed flat plate load test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] like figure 2 , image 3 Shown is a counterforce device used in the subgrade flat load test, which utilizes a pair of rails 8 and the self-weight of the sleeper fixedly connected with the rails 8 to provide counterforce for the counterforce rod in the flat load meter, and the device includes A pair of screw support mechanisms fixedly connected to the steel rails 8 on both sides and a reaction beam 1 arranged between the two screw support mechanisms. The bottom surface of the reaction beam 1 is in contact with the reaction bar and provides reaction force for the reaction bar. force.

[0052] like Figure 4 As shown, the bottom surface of the reaction beam 1 is uniformly provided with three reaction rod limiting grooves 10 matching the top of the reaction rod along the length direction of the reaction beam 1, and the reaction rod limiting grooves 10 are located between the two screw rods. between supporting structures.

[0053] The screw support mechanism includes a ...

Embodiment 2

[0063] In this embodiment, the bottom surface of the reaction beam 1 is uniformly provided with two reaction rod limit grooves 10 matching the top of the reaction rod along the length direction of the reaction beam 1, and the screw rod 4 is arranged along the axial direction of the screw rod 4. Two connection holes 2 are evenly opened, and the rest are the same as in Embodiment 1.

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Abstract

The invention relates to a counterforce device for subgrade plate loading test and a field test method. The counterforce device includes a pair of screw support mechanisms respectively in fixed connection with steel rails on both sides and a counterforce beam arranged between the two screw support mechanisms, the bottom surface of the counterforce beam contacts counterforce rods, and provides counterforce for the counterforce rods. The field test method includes: firstly determining an optimal measurement point position scheme, connecting the device with the steel rails after arriving at a measurement point, then adjusting the height of the counterforce beam till contact with the tops of the counterforce rods, and before detection, preloading a pressure to inspect the state of the counterforce beam, and then performing test. Compared with the prior art, the counterforce device provided by the invention can adapt to the construction process of an AHM800R-CH type subgrade treatment vehicle, solves the two problems of insufficient operation space and difficult counterforce device erection in subgrade K30 detection, the counterforce device is rapid in erection and transfer, has little influence on construction, and can realize zero interference on subgrade replacement operation.

Description

technical field [0001] The invention belongs to the technical field of railway embankment detection, and relates to a counter force device and an on-site testing method for embankment plate load tests. Background technique [0002] Roadbed diseases will affect the transportation capacity and order of the railway. Therefore, the existing ballasted railway line needs to regularly remediate the diseased roadbed to ensure the continuous and normal operation of the train. The renovation of the traditional ballasted railway subgrade is basically carried out by manpower. This method has low operation efficiency and is not easy to control the quality. Due to the limitation of the construction skylight and the work site, the replacement thickness of the subgrade bed is generally only about 0.3m. With the rapid development of my country's railway construction, the traditional diseased roadbed treatment technology has been difficult to meet the needs of railway diseased roadbed treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00G01N3/02
CPCE01B2203/16G01N3/00G01N3/02G01N2203/0019
Inventor 付龙龙周顺华肖军华张德叶伟涛王靖禹
Owner TONGJI UNIV