Installation method and steps of the fence net 1. Site preparation 1. Cut off the trees without special reserved value, so that the construction and installation of the system cannot be fully implemented. From the perspective of environmental protection, most of the damage to the vegetation on the slope is only temporary. Due to the openness of the system, the remaining stumps will re-grow through the mesh to develop new branches.
2. Remove floating soil and pumice on slopes that affect construction and construction safety. Under some slope conditions, the floating soil and pumice on the slope surface can not be cleared. As long as the safety implementation of the system can be ensured, it is not necessary to completely remove it. In fact, in some cases, if it can be completely removed, the flexible protection project may No need or more economical protection.
Second, the line-release work is embodied to determine the location of the anchor hole. According to the design spacing requirements of the anchor rod, generally, the side of the slope foot is used as the base point, and the position of each anchor rod is gradually measured to the other side and above. In this process, the following situations should be noted:
1. When it is necessary to cut the pit at the hole, it is advisable to make full use of the existing concave and convex features of the slope when positioning the anchor hole, and set the anchor hole directly at the natural pit as far as possible within the allowable spacing adjustment range. Small manual excavation workload.
2. If the rock and soil body at the standard hole position is extremely loose and broken, it may cause difficulty in hole formation, or encounter a lone stone or pumice stone, which may bring the risk of drilling work. In these cases, full use of the allowable The spacing adjustment range, the small range is appropriate to adjust the bolt position.
Third, the hole 1, generally using a light hand-held rock drill to drill the anchor hole.
2. The drilling operation should generally be carried out from the top-down construction sequence. In this process, the floating soil and pumice which have not been completely removed and affect the construction safety can be removed again.
3. Generally, before the drilling or drilling, a dimple that meets the design requirements should be chiseled at the orifice. The main function is to make the supporting rope of the exposed outer sleeve of the bolt passing through the position close to the slope. Therefore, its size can make the top inner edge of the exposed rod sleeve of the anchor not higher than the ground at the orifice. In the following two cases, it is not necessary to manually cut the pits. First, the anchor holes themselves are in the natural pits that meet the requirements, and the second is to monitor the slopes between the anchor holes or the orphaned stones, because in this In this case, even if the support rope at the anchor hole will be suspended, it can also be applied to the slope when it spans the protrusion.
4. The anchoring section of the steel wire rope anchor is two parallel steel wire ropes. The diameter of the anchor rod made of φ16 steel wire rope is 32mm in the flat direction, and the diameter of the anchor hole should be at least 10mm larger than the size. When the hole forming equipment is limited, it can be considered. Two adjacent small-diameter "human"-shaped anchor holes are drilled at the same position, so that the two steel ropes of the anchor can be respectively anchored into the two holes to meet the anchoring force requirements.
5. As with other anchoring works, the orientation of the bolt holes should generally be as perpendicular as possible to the slope, or as far as possible to the potential sliding surface (including discontinuous surfaces such as joint fissures).
4. Installation of bolts 1. The installation of steel wire rope anchors is similar to that of ordinary steel mortar anchors. In order to ensure good adhesion of the mortar body and the hole wall and the grip of the anchor body, it is also necessary to perform the hole washing and the centering of the rod body. Due to the flexibility and flattening characteristics of the wire rope anchor, in the case of anchoring depth of not more than 3 m, the slurry can be easily stirred by the manual agitation of the rod body. When the anchoring depth is larger, mechanical injection should generally be considered. Pulp.
2. It must be noted that the mortar body should not be left in the hole of the hole, and the mortar body is not allowed to completely bury the exposed outer cover of the bolt, otherwise the installation of the support rope will be very difficult.
5. Support rope installation 1. The support rope installation is relatively simple. Pass one end of a certain length of wire rope through the exposed ring sleeve of one end anchor rod and fix it with a rope card, and then pass through the exposed ring sleeve of the same row or the same column one by one until At the end of the support rope, the tensioner or the hoist with the tensioning ability of not less than 10kN is used to tighten the support rope, and the end of the support rope is fixed by the same specification.
2. In theory, the length of the support rope can be unrestricted. Even in order to reduce the number of fixed points, the longer the length, the better. However, due to the existence of the hole dimples, the support rope under tension is not A straight line, too long support rope may form excessive tension and it is difficult to tension. For this reason, it is generally preferred to control the maximum length of a single support rope to about 30m; in addition, when the design specifications of the vertical and horizontal support ropes are not At the same time, a single support rope should be installed in the same row or in the same row. Only when the design specifications are the same, in order to avoid material waste and leave too many fixed connection points when the support rope is too short at the corners, it can be considered to turn from the row. Columns or columns from the column to install.
3. For the road fence system, since the support rope is not required to be tensioned, the single support rope can be made as long as possible under the premise of easy handling and installation.
4, must pay attention to the installation time of the support rope, generally before the installation of the anchor mortar at least three days of solidification period.
Sixth, the grille hangs 1, from the construction safety and reduce the amount of cutting work, the grille should generally be carried out from top to bottom, the grid should overlap one to two rows of mesh width and tie with tie (tie spacing Generally about 1m), the net block should be as flat as possible and close to the slope.
2. Although we put the grilling and slinging process here after the support rope is installed, and this is the common process in the general site, if the conditions permit, it is more beneficial to lay the grille before the support rope is installed. It is sloping and can also improve construction safety, although this may partially increase the difficulty of installation.
solar street light
solar flood light
highbay light
grow light
zhongshanshi huadengxing lighting co., ltd , https://www.ledhdx.com