Method for carrying out load test on bridge support frame by prefabricated parts moved through tractive walking

Abstract

The invention relates to a method for carrying out load test on a bridge support frame. The method for carrying out load test on the bridge support frame by prefabricated parts moved through tractive walking is characterized by comprising the following steps: firstly placing a template special for loading on a box-beam template on the bridge support frame; installing a plurality of rails on the template special for loading along the longitudinal direction of the bridge support frame; placing gallows frames on the rails, using a tractor to tow the gallows frames to walk to transport the prefabricated parts horizontally to lift and lower the prefabricated parts on the first layer, carrying out load test detection on the bridge support frame and then lifting and lowering the prefabricated parts on the second layer after meeting the requirement; carrying out detection again after completing loading; after test detection meets the requirement, firstly unloading the prefabricated parts on the second layer and then unloading the prefabricated parts on the first layer after all the prefabricated parts on the second layer are unloaded. The method has good reliability and safety, high test efficiency, standard test measurement and high precision of load simulation.

Description

technical field [0001] The invention relates to a method for carrying out a loading test on a bridge support frame. Background technique [0002] The loading and preloading test of the bridge support frame is used to test the bearing capacity and deformation of the foundation and eliminate the inelastic deformation of the support frame to overcome the adverse effects of the deformation of the support frame during the installation process. The load is 1.2 of the self-weight of the reinforced concrete structure of the bridge. times, such as figure 1 As shown in the "Linear Load Distribution Diagram of Self-weight of Reinforced Concrete Structure of Standard Section Cross Section Bridge", the actual loaded load is figure 1 The load indicated in is multiplied by a factor of 1.2, and the load value is relatively large, generally 15.5kN / m 2 ~36.8kN / m 2 That is 1.55t / m 2 ~3.68t / m 2 . [0003] The method of loading test on the bridge support frame, the traditional method uses ...

AI Technical Summary

Problems solved by technology

[0005] 2) The measurement is inaccurate, the loading test is not standardized, and there are great safety hazards; the suspenders of the sandbags are easy to break, which is unsafe; due to the inaccurate measurement of the sandbags and the difficulty of accurately simulating the size distribution of the actual load of the bridge, the bridge is in the process of pouring concrete. In the middle, the bridge support frame cannot bear the self-weight of the bridge and the construction load, resulting in the collapse of the bridge support frame

[0006] 3) Occupation of roads affects traffic: In the traditional test method of sand bag loading, large cranes must be used to put sand bags on the bridge, and construction needs to occupy roads on both sides of the bridge, seriously affecting traffic and causing traffic congestion

[0007] 4) Long construction period; small sand specific gravity (1.45t / m 3 ), the number of hanging hooks is large, and the construction takes up the road, and the construction period is long

[0008] 5) Low reuse rate of sand bags

It does not meet the policies of circular economy, low-carbon economy, energy conservation and environmental protection, and sandbag loading needs to occupy the road, which does not meet the requirements of harmonious construction and environmental friendliness

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