Hubei acoustic test tube spot Hanchuan acoustic test tube sales

Zhang Li 3 Hubei acoustic pipe spot, Hanchuan acoustic pipe sales, 3 Zhang Li 3 During the construction of bored piles in deep bridges and docks, high-rise buildings, the acoustic transmission method is required to detect the pile foundations. Quality, according to the design requirements, the detection tube (acoustic detection tube) should be embedded in advance. If the pile diameter is below .2, two detection pipes must be buried, and the two detection pipes must be fixed on the same straight line in the steel cage. Three detection pipes need to be buried for piles with a diameter of .For the above, four detection pipes need to be buried, and the four detection pipes must be fixed in the steel cage in a square shape. Conventional requirements require the use of steel pipes with an outer diameter of -3.0 and a wall thickness of about 3.0, and on-site welding methods are used during construction. This method requires high construction costs and complicated operations, which brings great inconvenience to on-site construction. The construction cost only accounts for about 3/3 of the cost of ordinary welded pipes. Greatly improve work efficiency and reduce construction costs. Hubei sonic test tube spot, Hanchuan sonic test tube sales, 3 Zhang Li 3 The overall requirements for sonic test tubes tested by ultrasonic method are: the joints are firm and do not come apart, the seals do not leak, the pipe wall is flat and not discounted, the pipe body is smooth and vertical without deformation The buried depth of the acoustic pipe should be buried to the bottom of the cast-in-place pile, and its upper end should be higher than the top surface of the cast-in-place pile. The exposed height of the acoustic pipe on the same pile should be the same. The bottom of the sealed acoustic pipe should be sealed with a welded blind cover or steel plate to ensure that it is sealed without leakage. After the installation of the acoustic pipe, the upper opening should be capped or plugged to prevent foreign objects from falling when pouring concrete, causing the hole to be blocked. The fixed acoustic tube can be directly fixed on the inside of the steel cage by spot welding or wire binding. The spacing between the fixed points is generally no more than 1. The bottom end of the acoustic tube and the joint should be fixed with fixed points. For areas without reinforced cages, the acoustic tubes can be fixed with steel brackets. In order to ensure that the acoustic tubes are parallel to each other, triangular steel frame supports can be spot welded between the acoustic tubes. Distortion should be prevented when the connecting steel cage is placed in the pile hole. The acoustic tube is generally installed in sections along with the steel cage. Fix the acoustic tube with the bottom cover on the first section of the steel cage, and temporarily fix the rest on the prepared steel cage to be removed. When removing the steel cage, connect the upper section of the acoustic tube and insert it. , and at the same time tie the acoustic tube to the steel cage, and do it in sequence. The joint between each section can use a reverse-threaded sleeve interface or a casing welding solution. The reverse-threaded sleeve joint should use a soft rubber sealing ring. A long steel sleeve can be selected for the casing connection. The inner diameter is slightly larger than the sound. To measure the outer diameter of the tube, put the two acoustic tubes together, and use electric welding to weld the sleeves to the upper and lower ends of the acoustic tubes. No matter which joint scheme is used, it must ensure that the joint has sufficient strength to ensure that the acoustic tube will not be bent and detached under high hydrostatic pressure. The joint part should be dense and leak-free. The inner wall of the joint should be kept flat and there should be no welding slag or welding slag. burrs and other objects to avoid hindering the free movement of the transducer. If the acoustic detection pipe needs to be cut off, it should be cut with a cutting machine. After cutting, the pipe mouth should be polished to remove internal and external burrs. When it is not suitable to burn the welding steel bars with electric welding, the welding liquid should be avoided from splashing on the pipe body or joints. For each buried section of water injection, clean water should be added into the acoustic detection tube as a coupling agent for detection. The water cannot be used directly from the river, especially during the flood season. The river water has a high mud content. It must be purified before it can be used to fill the acoustic pipe to prevent clogging at the bottom of the acoustic pipe. Before pouring underwater concrete for foundation piles, the water level in the acoustic pipe should be checked. If the water in the pipe is not full, it should be refilled. The age of the test pile foundation concrete can only be tested at a later date. Before testing, the pile head should be chiseled to the design elevation, and a steel bar of about 100 meters long should be tied with a measuring rope to make a hanging hammer to test whether the acoustic detection pipe is smooth, and the pipe should be filled with clean water.