A device assembly and tensioning construction method for tensioning fork lug type cables or steel rods
A steel tie rod and fork lug technology is applied in the field of prestressed structure construction devices, which can solve the problems of difficulty in achieving tension control, unfavorable local stress control, uneven anchorage length, etc. The effect that is beneficial to the implementation of tension
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Embodiment 1
[0035] A device assembly for tensioning a fork-type cable or a steel rod, the fork-type cable or fork-type steel rod includes a cable body or a steel rod 7, and is located on the cable body or steel rod 7 Fork lugs 8 at both ends and the adjustment cylinder 2 and extension cylinder 9 near one end of the fork lug;
[0036] The device assembly for tensioning the fork lug type cable or steel rod includes: reaction force frame 1, tension rod 3, pole beam 4 and jack 5 (see figure 1 );
[0037] The reaction force frame 1 is similar to a "U"-shaped structure, which is divided into two pieces; the inner arc size of the reaction force frame is 3-5mm larger than the upper end surface size of the fork ear, and the opening of the "U"-shaped structure is designed as a step shape. It is provided with a bolt hole 14 and a tension rod semicircular groove I15 for passing through the tension rod (see diagram 2-1 , Figure 2-2 );
[0038] The shoulder pole beam 4 is a two-half structure, th...
Embodiment 2
[0041] A tensioning construction method for two-end lug-type stay cables or steel rods, which comprises the following steps:
[0042] A. Install the reaction frame: install the two halves of the reaction frame 1 on both sides of the fork lug 8 of the fork lug type cable or steel rod respectively, the inner arc 13 of the reaction frame and the outer arc surface of the fork ear 8 Contact; then fix the two pieces of reaction frame 1 on the fork ear type cable or the fork ear of the steel tie rod through the bolt 11 and the connecting plate 12, and the semicircular groove I of the two pull rods is combined into a through hole;
[0043]B. Installing the pole beam: Install the pole beam 4 at the position of the cable body or the extension tube 9 of the steel rod 7; 4 fixed, the two tie rod semicircular slots II 43 synthesize a circular through hole that allows the tension rod 3 to pass through;
[0044] C. Install the tension rod: first pass the tension rod 3 through the tension ro...
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