1. Purpose and Characteristics

The XH-50T/60T/80T/100T anchor rod tension meter (pull-out instrument) developed and produced by Beijing Tiandi Xinghuo Technology Development Co., Ltd. is suitable for detecting the anchoring force of anchor rods, anchor cables, steel bars, anchor bolts, and other anchor solids. It is one of the necessary instruments for quality inspection of anchor rod construction and support engineering.

The tension gauge consists of a manual pump, hydraulic cylinder, digital pressure gauge, and high-pressure rubber hose. The pump body is made of precision steel, with a long service life. The XH series hollow oil cylinder is equipped with a handle and can be quickly connected to the hydraulic pump through a quick connector. The digital pressure gauge reading is intuitive and can directly read the anchor rod tension (KN) value. This series of tension gauges has a compact structure, convenient carrying, small size, and light weight. The manual pump of the tension gauge can also be used as a power source for universal low flow high-pressure oil.

2 主要技术参数

3 Working principle

The working principle of the anchor rod tension meter (pull-out instrument) is: when the central hole of the jack covers the tested rod, select a suitable fixture to clamp the part of the tested rod that exposes the central hole; Under the action of the hydraulic pressure of the pressure pump, the oil pressure is transmitted to the jack cylinder body through the oil pipe, and the piston rod moves outward against the specialized clamp; The pressure directly acts on the outer shell of the anchor and is then transmitted to the clamp. After being subjected to force, the clamp clamps the tested rod tightly, ultimately causing the rod to experience outward pulling force; At this point, the pressure gauge on the pressure pump displays the corresponding force (kN) value, which reflects the magnitude of the pulling force on the tested rod.

If the above rods are steel bars, the magnitude of the anchoring force on the steel bars can be measured. After the tension gauge is tested, it is necessary to manually shake and vibrate the anchor with minimal force to easily remove and pull the jack.

4 Preparation for testing

1. According to the requirements of users (owners, quality supervisors, contractors, etc.) and in combination with the engineering situation, select sampling testing points, determine qualified tensile values, and use group testing plans to prepare for the correct implementation of corresponding testing tasks;

2. Before testing, the puller must be systematically calibrated and inspected to ensure the authenticity and reliability of on-site testing data;

Before conducting spot checks, technical disclosure should be made to specific operators to unify the testing methods, in order to accurately complete the corresponding actual operations;

After being confirmed by the entrusting party, specific anchor force pull-out testing can be carried out;

5. 1-2 operators are sufficient.