Quick connecting piece in pile foundation static load test

Abstract

The invention discloses a quick connecting piece in a foundation static load test. The quick connecting piece comprises a connecting prestressing tendon and sub-connectors. At least one end of the connecting prestressing tendon can be in axial locking connection with the sub-connectors. The ends, back on to the connecting prestressing tendon, of the sub-connectors are provided with positioning holes, the diameter of the positioning holes can be decreased, the positioning holes are provided with adjusting pieces, and the diameter of the positioning holes can be adjusted through the adjusting pieces. The quick connecting piece can be in quickly detachable connection with a pile foundation rebar through the sub-connectors connected to one end of the prestressing tendon, the connecting speed is high, the junction between the rebar and the sub-connectors is convenient to adjust, and therefore it is guaranteed that the rebar on the top of a pile is stressed evenly. Furthermore, as the quick connecting piece is convenient to connect, high-lift operation can be avoided, work difficulty and work risks are lowered, materials are saved, material waste is avoided, repeated testing can be achieved, and the success probability of testing can be enhanced.

Description

technical field [0001] The invention relates to a pile foundation static load detection device, in particular to a quick connector for pile foundation static load detection. Background technique [0002] As an important means of providing parameters for pile foundation design and measuring the quality of pile foundation construction, pile foundation static load has always been the most important item for foundation detection. In recent years, with the rapid development of my country's economy, it is restricted by land and civil air defense projects. my country's construction has shown a trend of higher and higher upwards and deeper downwards. Correspondingly, the amount of pile foundation engineering is increasing, and the vertical pull-out bearing capacity and vertical compression resistance of single piles are increasing. Bearing capacity requirements are getting higher and higher. How to use the anchor pile method to test the vertical compressive capacity of single piles an...

AI Technical Summary

Problems solved by technology

[0008] 1. When the load is applied, due to the rigid connection, some connected steel bars will be long, some steel bars will be short, and the force on the pile top steel bars will be uneven, which will cause some steel bars to be destroyed first, resulting in detection failure;

[0009] 2. For the welding connection, it needs to consume a lot of welding rods and labor, especially in the detection of high tonnage, often this item needs to spend a lot of labor, especially when connecting the hanging blue and the steel bar on the main beam, because it is a high work, it will also cause accidents such as falling of employees

[0010] 3. For mechanical connection, compared with welding, welding is reduced, and a lot of labor will be reduced accordingly, but thread patterns must be reserved on the pile top steel bars and connecting steel bars for mechanical connection, and these reserved thread patterns It will not be used in subsequent use, which also causes a certain amount of waste

[0011] 4. Whether it is a mechanical connection or a welded connection, connecting steel bars are required. After each pile is tested, the welding section of these steel bars is cut off, so that they cannot be reused in the next test. It also caused a lot of waste of materials and resources. For mechanical connections, if the design of the reserved thread is not good, it will also cause the connection height to be inconsistent, resulting in re-production and unnecessary waste.

[0012] 5. In the above connections, the hanging blue is used, especially in the welding connection, the hanging blue itself has a large weight, and it often needs to use a crane to install it, which increases the difficulty. On the other hand, due to frequent welding , some of the hanging baskets have been damaged after being used for several times. force, thus causing quality accidents caused by the drop of hanging blue, and also lead to the failure of detection

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