Passive protective net and installation method thereof

[0028] Embodiment 1: A passive protective net, including a steel wire rope net, a steel column for fixing the steel wire rope net, an upper support rope, a lower support rope and an upper pull anchor rope. The bottom of the steel column is fixedly installed on the base through a connecting screw, and the upper support rope , The lower support rope fixes the steel wire rope net and the steel column together, and the upper pull anchor rope tightens and fixes the top of the steel column. The passive protective net also includes a warning component. The warning component includes a tension sensor arranged on the wire rope net, the upper supporting rope or the upper anchor rope, a control device arranged on the top of the steel column, a warning light and a buzzer; the control device includes GPS positioning Modules, wireless transmission modules, control modules and power modules that provide power to each module; the tension sensor is connected to the control module through the A/D converter, and the warning light and buzzer are electrically connected to the control module; the control module is transmitted wirelessly The module is connected to the remote terminal. The control device is hermetically sealed in a metal casing. The control module is an Arm7 series microcontroller. There are pressure relief rings on the upper support rope, lower support rope and upper pull anchor rope, side pull anchor ropes are also installed on the steel column, and a wire grille is installed inside the wire rope net, which is galvanized steel wire rope. network.

[0029] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components.

[0030] The installation method of the passive protection net of the present invention is as follows:

[0031] 1. Clean up the floating soil and pumice on the slope to be constructed; 2. Measure and locate the steel column and anchor rod foundation, measure the line to determine the position of the steel column, and drill and clear the anchor cable hole; The length of the designed system is increased by 3-8%, and the terrain is undulating and the system layout is difficult to be arranged in a straight line along the same contour. The upper limit (8%); for the terrain is relatively flat and regular, the system layout can basically be on the same contour Take the lower limit (3%) when arranging along a straight line; on this basis, the column spacing can be shortened by 20% of the design spacing or widened the adjustment range.

[0032] 4. Steel column concrete foundation pouring and pre-embedded parts construction. When the base rock is exposed or the cover layer is very thin at the system foundation position, drill the anchor bolt holes directly, and the steel column concrete foundation anchor bolt and anchor bolt diameter shall not be less than Φ42mm , The top surface of the foundation is smoothed with a thin layer of C20 fine stone concrete or M20 cement mortar, and the hole diameter of the anchor rod is not less than Φ42mm; when the foundation position is an overburden with a thickness less than the depth of the concrete foundation, the overburden part is replaced with concrete , The lower part is directly drilled to drill the bolt hole to form a composite foundation. The concrete foundation is manually excavated, and blasting operations are prohibited in principle; the top surface of the concrete foundation is flush with the ground at the centerline of the stone barrier network system; the angle between the long axis of the steel column foundation and the centerline of the foundation and the left and right foundation centers When the exposed height of the steel column concrete foundation side wall exceeds 30cm, C20 reinforced concrete shall be used, the longitudinal reinforcement shall be made of Φ16 threaded steel, the thickness of the protective layer shall not be less than 70mm, the stirrup shall be made of Φ8 round steel, and the thickness of the protective layer 30mm, the buried steel column foundation and anchor rod foundation below the ground are C20 plain concrete; the borehole grouting anchor rod adopts M20 cement mortar or pure cement mortar; the anchor bolt anchor rod is processed by Φ32 threaded steel bar. The total length is L=1.0m, the top thread is M27×100, and it is equipped with corresponding washers and nuts.

[0033] 5. To install the steel column by pulling the anchor rope, place the steel column uphill and place the bottom of the steel column at the base; hang the hanging ring of the upper anchor rope on the top hanging seat of the steel column, and then place the other part of the rope One end is connected with the corresponding upper pull anchor ring sleeve and temporarily fixed with a rope clamp; the steel column is slowly raised and aligned with the base, then the bottom of the steel column is inserted into the base, and finally the connecting screw is inserted and tightened; the anchor is pulled up Rope to adjust the position of the steel column according to the design position, tighten the upper anchor rope and fix it with a rope clamp. The installation method of the side-pull anchor rope is the same as that of the upper-pull anchor rope, except that the upper-pull anchor rope is installed. Set a Φ16 middle reinforcement anchor rope every 50m.

[0034] 6. Install the upper and lower support ropes, hang the loop of the first upper support rope on the bottom of the top hanging base of the starting steel column, and then adjust the support rope upward in the direction parallel to the direction of the system and place it on the top hanging base of the steel column Adjust the pressure relief ring in place (50cm away from the steel column, the relief ring of each span on the same support rope is arranged symmetrically with respect to the steel column); at the second steel column, use a rope clamp to hold the support rope Fixed on the outer side of the top hanger of the steel column (only 30% standard tightening force), at the third steel column, put the support rope on the inner side of the top hanger of the steel column, and install the support rope alternately on the top of the steel column. The outside and inside of the hanger until the last steel column of this paragraph is wound down to the hanger of the steel column base, and then temporarily fixed with a rope clamp; adjust the position of the pressure relief ring again, when you are sure that the pressure relief ring is all Tighten the support rope and fix it with a rope clip after it is in place; the installation method of the second upper support rope is the same as the first one, except that it is from the last steel column of the first support rope to the first steel column. The installation is reversed, and the pressure relief ring is located on the other side of the same span; a rope clip is used to connect the two upper support ropes to each other at a distance of 40cm from the pressure relief ring (only 30% of the standard tightening force). The installation of the lower support rope is similar to the installation of the upper support rope.

[0035] 7. Wire rope net installation, use an extra hoisting rope to pass through the edge mesh of the wire rope net and fix one end on the top of a steel column near the top, and the other end is wound to its base through another steel column hanger and temporarily fixed ; Use the rope tightener to tighten the hoisting rope until the steel wire rope net rises to the level of the upper support rope, and then use the excess rope clip to temporarily loosen the connection between the net and the upper support rope. At the same time, the net and the lower support rope can be temporarily loosened. Connect to ensure safer sewing. After that, the lifting rope can be loosened and pulled out; repeat the above steps until all the wire rope nets are temporarily hung on the upper support rope, and move the wire rope net sideways to make it in the correct position; press the suture rope Cut off 1.3 times the length of the perimeter of the single net, and mark the middle point; sewing of the wire rope net: start from one end of the system, first fix the middle point of the suture rope to the support rope at the middle point of the upper edge of each net Starting from the midpoint, use half of the suture rope to gradually wind the net and the two supports to the left, until the two support ropes are connected together with a rope clip, then use the suture rope to connect the net to the one without the pressure relief ring The supporting ropes are twisted together. When reaching the hanging seat on the top of the column, pass the suture rope through the front side of the hanging seat (cannot be wound on the hanging seat), turn down and continue to repeat the above steps until the base hanging seat, also from the hanging seat. The front side of the seat passes through and continues to turn to the right to wind a lower support rope without a pressure relief ring until the rope clip that connects the two support ropes is outside. From here on, the net and the two lower support ropes are wound with suture ropes. Together, until it straddles the middle point of the lower edge of the wire rope net 1m, finally fix the suture rope with the wire rope net with a rope clamp. The rope clamp should be placed about 0.5m away from the end of the suture rope. The other half of the suture rope is from the edge of the net. Start to sew to the right at the midpoint until it meets the other net and turn down to sew the two nets together. When reaching the lower support rope, turn to the net and entangle with the two support ropes, and finally make the left and right sides The ends of the suture rope overlap 1.0m.

[0036] 8. The grille is installed. The grille should be hung on the inner side of the wire rope net and should be overlapped with the edge of the wire rope net and folded to the outer side of the net 15cm, fixed to the net with a wire tie; the bottom of the grille should be laid about 0.5m upward along the slope, and In order to make no gap between the lower support rope and the ground, use some stones to press the bottom of the grille; each grille is overlapped for about 10m; the grille is fixed to the net with tie wire, and the tie distance is not more than 1m.

[0037] 9. Install the warning component, install the tension sensor on the steel wire rope net, the upper support rope or the force position on the upper anchor rope, set the force limit value, install the warning light and the buzzer on the top of the steel column, and then The tension sensor, warning light and buzzer are correspondingly connected to the control device and debugged, and connected to the remote terminal through the wireless transmission module.