Engineering pile foundation static load detection resistance anchor hoe

Abstract

An engineering pile foundation static load detection resistance anchor hoe is characterized by comprising a supporting seat, a resistance rod plate, a shaft falling-off device and a hanging ring. A supporting shaft is arranged on the supporting seat, and the resistance rod plate is connected with the supporting seat through the supporting shaft and can do circumferential rotation along the supporting shaft; the shaft falling-off device is arranged on the upper portion of the supporting seat and is connected with the supporting seat, and the hanging ring is arranged in the middle position of the top of the supporting seat; and a recycling device is arranged at the bottom of the supporting seat. The engineering pile foundation static load detection resistance anchor hoe has the beneficial effects that the hoe is reasonable in structural design, easy and convenient to operate and low in equipment manufacturing, maintaining and implementing cost; the detection site is easy to assemble and disassemble; and after the test is finished, recycling is convenient, and the working efficiency and the safety of an engineering pile foundation static load detection test can be obviously improved.

Description

Technical field [0001] The invention relates to a resistance anchor hoe, which is a resistance anchor hoe specially used for static load detection tests on pile foundations of construction projects. Background technique [0002] With the continuous progress of society and the increase of high-rise buildings, the amount of pile foundation will increase accordingly, which will put higher requirements on pile foundation; in addition, for geotechnical engineering, pile foundation plays a vital role, and With the continuous development of geotechnical engineering, higher requirements will be put forward on building pile foundations. Regardless of which type of pile foundation is used, in order to avoid or reduce pile foundation problems, relevant national mandatory regulations require that a certain number of pile foundations must be selected for field load testing to determine whether the ultimate bearing capacity of the pile foundation meets the design requirements. [0003] At prese...

AI Technical Summary

Problems solved by technology

[0005] The ballast method must solve the source, stacking and transportation of hundreds of tons or even thousands of tons of load; the anchor pile method must set up multiple anchor piles and reaction girders. Multiple anchor piles are not only expensive, but also take a long time to maintain , and is easily limited by the tonnage and site conditions; the resistance cylinder is prone to inconsistent drilling depth due to the uneven strength of the rock and soil layers on both sides of the cylinder

1. Due to the lack of effective enclosure protection for the large-volume concrete blocks required by the ballast method, the concrete blocks often slip and the ballast body collapses during the testing process, resulting in production safety accidents such as on-site testing staff casualties. There are problems such as the installation and disassembly of each component and the long time for the implementation of the detection test in the load detection method.

2. During the test of the anchor pile method, when the loading pressure is too large, the welded joint between the anchor pile and the main reinforcement of the anchor pile head may be cracked or broken, which will directly cause the reaction of the combination of the steel beam and the anchor pile. The force frame collapses, which will not only damage the jacks and displacement sensors and other related detection instruments, but also bury hidden dangers to the safety of the test personnel.

[0008] Yet the applicant finds after using for a period of time that this resistance cylinder also has some defects, and this is because: 1. The cost is high, making a resistance cylinder at least more than 100,000 yuan, and the investment cost is high

2. It is difficult to recover. During the test of the resistance cylinder, when the strength of the underground rock and soil layer on the outer side of the resistance cylinder is inconsistent, the resistance rod plate on the resistance cylinder body will have different drilling depths when it is bitten into the underground rock and soil layer. It is easy to cause the top of the resistance cylinder to incline towards the side of the soft rock and soil layer, so that the force on the resistance cylinder is uneven, and the outer side of the upper part of the resistance cylinder will rub against the surface of the adjacent underground rock and soil layer. When the friction force is large , the lifting device on the ground will not be able to lift the resistance cylinder to the ground, and the expensive resistance cylinder will be easily lost

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