CN114809570A - High slope anchor rod construction stepped movable support construction method - Google Patents
High slope anchor rod construction stepped movable support construction method Download PDFInfo
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- CN114809570A CN114809570A CN202210413879.7A CN202210413879A CN114809570A CN 114809570 A CN114809570 A CN 114809570A CN 202210413879 A CN202210413879 A CN 202210413879A CN 114809570 A CN114809570 A CN 114809570A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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Abstract
Compared with the traditional construction method of setting up a full-distributed support on a slope, the construction method has the advantages that a plurality of scaffold universal wheels are respectively sleeved at the bottoms of the vertical rods of the supports and the longitudinal rod ends of the step frames, the supports are moved to the next anchor rod construction position for construction, a large number of steel pipe fasteners are saved, the cost and the time are saved, and the project construction period cost control is facilitated.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a stepped movable support for high slope anchor rod construction.
Background
With the construction of freeways in China, adverse geological conditions such as expansive soil, joint crack development and rock stratum breakage are frequently encountered in the excavation process of high slope cutting, and the anchor rod frame beam serving as a novel slope reinforcement form is widely applied to the protection engineering of the adverse geological slopes.
Traditional anchor rod construction adopts the method construction of setting up full cloth formula support on domatic more, and full cloth formula support sets up loaded down with trivial details, and demand steel pipe fastener is in large quantity, and is with high costs to the support is dismantled, the transport consumes artifical more, and the efficiency of construction is low, is unfavorable for the timely protection of side slope. Therefore, it is one of the problems to be solved to find an efficient construction method to solve these drawbacks.
Disclosure of Invention
The invention aims to provide a construction method of a stepped movable support for high slope anchor rod construction, which has the advantages of movable construction, simple erection, low cost and high construction efficiency.
The technical purpose of the invention is realized by the following technical scheme: a construction method of a stepped movable support for high slope anchor rod construction comprises the following steps: step S1: setting up a support according to the vertical height and slope rate of an excavated side slope and the included angle between an anchor rod and the horizontal direction, wherein three step frames extending to the surface of the side slope are arranged on one side of the support close to the side slope, the included angle between each step frame and the horizontal direction is equal to the included angle between the anchor rod and the horizontal direction, one ends of the three step frames close to the side slope are respectively positioned at 4 equal points of the vertical height of the side slope, and the three step frames are reinforced through steel pipes; step S2: laying a bamboo plywood platform on the ladder rack; step S3: installing a high-pressure down-the-hole drill on the bamboo plywood platform, and drilling holes through the high-pressure down-the-hole drill; step S4: the anchor rods are lifted up step by step along the three step frames to be placed on different step frames, and anchor rod placing operation is carried out; step S5: carrying out anchor rod grouting operation; step S6: respectively sleeving a plurality of scaffold universal wheels at the bottoms of the upright rods of the supports and the longitudinal rod ends of the ladder frames, moving the supports to the next anchor rod application station, detaching the scaffold universal wheels, and performing the processes from the step S3 to the step S5 again; step S7: and repeating the process of the step S6 until the slope anchor rod construction is finished.
By adopting the technical scheme, compared with the traditional construction method of erecting a full-distributed support on a slope, the construction method has the advantages that a plurality of scaffold universal wheels are respectively sleeved at the bottom of the vertical rod of the support and the longitudinal rod end of the ladder frame, and the support is moved to the next anchor rod construction position for construction, so that a large number of steel pipe fasteners are saved, the cost and the time are saved, and the construction period cost control of a project is facilitated; meanwhile, the size of the included angle between the ladder frame and the horizontal direction is equal to the size of the included angle between the anchor rod and the horizontal direction, and one ends of the three ladder frames, which are close to the side slope, are respectively positioned at 4 equal points of the vertical height of the side slope, so that the subsequent anchor rod placing operation is facilitated.
The invention is further provided with: in step S1, two cables are installed at the top of the bracket in an inclined direction to hold the bracket, one end of each cable is tied to the bracket, the other end of each cable is tied to a steel chisel, and the steel chisel is inserted into the slope for fixing.
Through adopting above-mentioned technical scheme, the three extension frame of support extends to the side slope surface, and the slope of side slope is big more, and the stability of support is poor more, through set up two cables in support top slant upwards and hold the support, and the drill rod is tied to cable one end system on the support and the other end, and the drill rod inserts the side slope internal fixation to prevent that the support from toppling.
The invention is further provided with: before moving the bracket in step S6, respectively sleeving a plurality of scaffold universal wheels at the bottom of the upright rod of the bracket and the longitudinal rod end of the ladder rack, then unwinding the inhaul cable and pushing the bracket to move to the next anchor rod construction position; meanwhile, after the support is moved to the next anchor rod application station in the step S6, firstly, the pull cables are tied at the top of the support, and then the plurality of scaffold universal wheels are detached.
Through adopting above-mentioned technical scheme, install the general wheel of scaffold earlier before the movable support and untie the cable again, tie the cable earlier and demolish the general wheel of scaffold again behind the movable support to guarantee the firm of support, prevent that the support from toppling when demolising the general wheel of scaffold.
The invention is further provided with: when the support is moved in step S6, channel bars are respectively placed on the moving paths of the scaffold universal wheels of the ladder corresponding to the side slopes.
By adopting the technical scheme, aiming at the problem of loose soil quality of the side slope, channel steel can be respectively placed on the moving path of the scaffold general wheels of the side slope corresponding to the ladder frame, so that the scaffold general wheels can be embedded into the moving path and then used as a moving track, and the resistance of the support during moving is reduced.
The invention is further provided with: in step S6, the three ladder frames correspond to the three channel steels, and a length adjustment mechanism is installed between two adjacent channel steels to adjust the distance between the two channel steels; meanwhile, a plurality of hanging rings are welded on the upper side of the upper channel steel, a stay cable is arranged on each hanging ring to pull the channel steel, one end of the stay cable is tied to each hanging ring, the other end of the stay cable is tied to a steel chisel, and the steel chisel is inserted into the top of the side slope to be fixed so as to prevent the channel steel from sliding off; the installation process of the length adjusting mechanism between the two channel steels is as follows: firstly, a plurality of screw rods are welded on one channel steel, then a plurality of corresponding screw rods with opposite thread directions are welded on the other channel steel, and finally a plurality of threaded pipes with reverse threads at two ends are connected to the two corresponding screw rods of the two channel steels.
By adopting the technical scheme, the height of the scaffold universal wheel at the three extending frames of the bracket needs to be adjusted according to the height of the side slope, so that the placing position of the channel steel on the side slope also needs to be correspondingly adjusted; when placing the steel channel, earlier according to the size calculation back of extending the frame position between the adjacent channel bar to lead to the interval between the adjacent channel-section steel of length adjustment mechanism regulation, then arrange the channel-section steel in on the side slope, and fix on the side slope through cable, drill rod, in order to prevent the channel-section steel the condition that the landing appears on the side slope.
The invention is further provided with: in step S4, the construction steps of raising the anchor rods along the three step frames to be placed on different step frames are as follows: (1) enabling one worker to stand on the lower ladder frame, enabling two workers to stand at the top of the side slope, and tying two ends of the anchor rod through two ropes; (2) two workers at the top of the side slope pull the rope, under the assistance of workers at the lower ladder rack, the hook end of the anchor rod is downward, the tip end of the anchor rod is upward pulled to the lower anchor hole, and the hook end of the anchor rod is lapped on the lower ladder rack; (3) the workers at the lower ladder frame climb to the middle ladder frame, two workers at the top of the side slope pull the ropes, the hook end of the anchor rod is downward under the assistance of the workers at the middle ladder frame, the tip end of the anchor rod is upward pulled to the middle anchor hole, and the hook end of the anchor rod is lapped on the middle ladder frame; (4) workers at the middle step frame climb to the upper step frame, two workers at the top of the side slope pull the rope, under the assistance of the workers at the upper step frame, the hook end of the anchor rod is downward, the tip end of the anchor rod is upward pulled to the upper anchor hole, and the hook end of the anchor rod is lapped on the upper step frame.
Through adopting above-mentioned technical scheme, when rising the stock step by step to the ladder frame of difference, because of the slope of side slope exists, make the most advanced of stock be close to and strike the side slope at the pulling in-process easily, the rope at stock both ends is held through two workman at the side slope top this moment, and supplementary through the workman of ladder frame department, make the crotch end of stock down earlier, the most advanced of stock is drawn to below anchor eye department up, and take the crotch end of stock on below ladder frame, thereby can avoid the most advanced of stock to take place to collide with side slope or support in the rising process step by step.
The invention is further provided with: in rising the stock step by step along three ladder frame in order to realize placing the construction step on the ladder frame of difference, at ladder frame side installation fixed pulley, stand during the workman on ladder frame is supplementary for the most advanced rope of being close to the stock bypasses the fixed pulley, and adjusts the fixed position of the most advanced rope of being close to the stock in advance, avoids colliding with the side slope when the most advanced of stock is drawn up.
Through adopting above-mentioned technical scheme, when the supplementary stock of the workman that the ladder frame goes out was the height step by step, workman on the ladder frame is through making the most advanced rope that is close to the stock bypass the fixed pulley, and the fixed position of the most advanced rope that is close to the stock of adjustment in advance to this rope is in the part between fixed pulley and the stock and extends along vertical ascending square, at the ascending in-process of stock, the most advanced and the slope of stock are kept away from gradually, avoid colliding with the side slope when the most advanced of stock is drawn up.
The invention is further provided with: in the anchor rod setting operation of step S4, a worker standing on the ladder rack inserts the tip end of the anchor rod into the corresponding anchor hole first until the entire anchor rod is completely inserted, and when setting the anchor rod positioned on the lower ladder rack, a worker standing on the top of the slope should simultaneously tighten the rope connected to the hook end near the anchor rod.
Through adopting above-mentioned technical scheme, when laying the stock that is located below ladder frame, the length that wears out the support because of the crotch end of stock is the longest for the workman that stands at the side slope top should strain the rope of connecting near the crotch end at the stock simultaneously, thereby alleviates the working strength of the workman of standing on ladder frame, and prevents to collide with ladder frame after the most advanced perk of stock and cause the damage.
Detailed Description
The present invention will be described in further detail below.
Example (b): a construction method of a stepped movable support for high slope anchor rod construction comprises the following steps: step S1: setting up a support according to the vertical height and slope rate of an excavated side slope and the included angle between an anchor rod and the horizontal direction, wherein three step frames extending to the surface of the side slope are arranged on one side of the support close to the side slope, the included angle between each step frame and the horizontal direction is equal to the included angle between the anchor rod and the horizontal direction, one ends of the three step frames close to the side slope are respectively positioned at 4 equal points of the vertical height of the side slope, and the three step frames are reinforced through steel pipes; step S2: laying a bamboo plywood platform on the ladder frame; step S3: installing a high-pressure down-the-hole drill on the bamboo plywood platform, and drilling holes through the high-pressure down-the-hole drill; step S4: the anchor rods are lifted up step by step along the three step frames to be placed on different step frames, and anchor rod placing operation is carried out; step S5: carrying out anchor rod grouting operation; step S6: respectively sleeving a plurality of scaffold universal wheels at the bottoms of the upright rods of the supports and the longitudinal rod ends of the ladder frames, moving the supports to the next anchor rod application station, detaching the scaffold universal wheels, and performing the processes from the step S3 to the step S5 again; step S7: and repeating the process of the step S6 until the slope anchor rod construction is finished.
Wherein in step S1 and step S6, the points about the stent stability and movement are as follows: (1) in the step S1, two stay cables are arranged on the top of the bracket in an inclined upward manner to pull the bracket, one end of each stay cable is tied on the bracket, the other end of each stay cable is tied on a steel chisel, and the steel chisel is inserted into the slope for fixing; (2) before moving the bracket in step S6, respectively sleeving a plurality of scaffold universal wheels at the bottom of the upright rod of the bracket and the longitudinal rod end of the ladder rack, then unwinding the inhaul cable and pushing the bracket to move to the next anchor rod construction position; meanwhile, after the bracket is moved to the next anchor rod application station in the step S6, firstly tying a pull rope at the top of the bracket, and then removing the plurality of scaffold universal wheels; (2) respectively placing channel steel at the moving path of the scaffold universal wheel of the ladder frame corresponding to the side slope when the support is moved in the step S6, wherein the three ladder frames correspond to the three channel steel, and a length adjusting mechanism is arranged between the two adjacent channel steel to adjust the distance between the two channel steel; meanwhile, a plurality of hanging rings are welded on the upper side of the upper channel steel, a stay cable is arranged on each hanging ring to pull the channel steel, one end of the stay cable is tied to each hanging ring, the other end of the stay cable is tied to a steel chisel, and the steel chisel is inserted into the top of the side slope to be fixed so as to prevent the channel steel from sliding off; the installation process of the length adjusting mechanism between the two channel steels is as follows: firstly, a plurality of screw rods are welded on one channel steel, then a plurality of corresponding screw rods with opposite thread directions are welded on the other channel steel, and finally a plurality of threaded pipes with reverse threads at two ends are connected to the two corresponding screw rods of the two channel steels.
In step S4, the construction steps of raising the anchor rods along the three step frames to be placed on different step frames are as follows: (1) enabling one worker to stand on the lower ladder frame, enabling two workers to stand at the top of the side slope, and tying two ends of the anchor rod through two ropes; (2) two workers at the top of the slope pull the ropes, under the assistance of workers at the lower step frame, the hook end of the anchor rod is downwards, the tip end of the anchor rod is upwards pulled to the lower anchor hole, and the hook end of the anchor rod is lapped on the lower step frame; (3) the workers at the lower ladder frame climb to the middle ladder frame, two workers at the top of the side slope pull the ropes, the hook end of the anchor rod is downward under the assistance of the workers at the middle ladder frame, the tip end of the anchor rod is upward pulled to the middle anchor hole, and the hook end of the anchor rod is lapped on the middle ladder frame; (4) workers at the middle step frame climb to the upper step frame, two workers at the top of the side slope pull the rope, under the assistance of the workers at the upper step frame, the hook end of the anchor rod is downward, the tip end of the anchor rod is upward pulled to the upper anchor hole, and the hook end of the anchor rod is lapped on the upper step frame.
In rising the stock step by step along three ladder frame in order to realize placing the construction step on the ladder frame of difference, at ladder frame side installation fixed pulley, stand during the workman on ladder frame is supplementary for the most advanced rope of being close to the stock bypasses the fixed pulley, and adjusts the fixed position of the most advanced rope of being close to the stock in advance, avoids colliding with the side slope when the most advanced of stock is drawn up. In the anchor rod setting operation of step S4, a worker standing on the ladder rack inserts the tip end of the anchor rod into the corresponding anchor hole first until the entire anchor rod is completely inserted, and when setting the anchor rod positioned on the lower ladder rack, a worker standing on the top of the slope should simultaneously tighten the rope connected to the hook end near the anchor rod.
The implementation effect is as follows: compared with the traditional construction method of erecting a full-distributed support on a slope, the method has the advantages that the bottom of the vertical rod of the support and the longitudinal rod end of the ladder frame are respectively sleeved with the plurality of universal scaffold wheels, the support is moved to the next anchor rod construction position for construction, a large number of steel pipe fasteners are saved, the cost is saved, the time is saved, and the construction period cost control of a project is facilitated.
Regarding quality control: the support is built by steel pipes with the specification of phi 48 multiplied by 3.5mm, the steel pipes are connected by fasteners, and the quality control of the support is mainly embodied in the quality control of the steel pipes and the fastener materials used by the support. The bracket steel pipe adopts Q235A (No. 3) steel to weld the steel pipe (carbon content), the steel pipe must have quality certification and steel pipe material inspection report, and the material should accord with the regulation of the national standard carbon structural steel (GB 700). The surface of the selected steel pipe is flat and smooth, and the phenomena of cracks, holes, scabs, layering and dislocation, burrs, indentations and serious corrosion are avoided, and the steel pipe is subjected to rust prevention treatment in the using process. The fastener is made of malleable cast iron, the material of the fastener is in accordance with the national standard of Steel pipe scaffold fastener (GB 15831), the fastener is subjected to appearance inspection before use, the fastener with cracks, air holes and deformation is forbidden to be used, and the bolt with slippery threads needs to be replaced.
Regarding environmental measures: the construction method basically has no pollution to the environment in the use process, the adopted main environmental protection measure is the recovery of the scrapped steel pipe fasteners, and the operation personnel are forbidden to randomly lose garbage in the construction process, so that the environment is prevented from being damaged.
For benefit analysis: (1) social benefits are as follows: the construction method overcomes the defects of complex erection, high labor consumption time and low working efficiency of the traditional construction support, solves the problems of heavy weight of the anchor rod and narrow construction platform, accelerates the construction progress of drilling and anchor rod installation, smoothly completes the anchor rod construction of 2.5 ten thousand linear meters 2 months ahead of the planned construction period, simultaneously ensures the safety of high-altitude operation personnel, and has no safety accident and safe operation in the whole construction process. (2) And (3) economic benefit analysis: the slope protection length of the left sixth-level side slope of the K4+000-K4+120 section of the great way in south Wucheng city is 120 meters, economic benefit comparative analysis is carried out by taking the side slope as a special case, the side slope uses a three-level step type movable support to construct an anchor rod, and the labor cost and the main material cost for erecting the support are as follows: steel pipe: 17 × 1.5+14 × 1.2+4 × 9+10 × 2+3 × 1.2+3 × (6.2 +4.13+ 2.1) =139.19 m, the steel pipe cost is 16 yuan per m and the total amount is 2227 yuan; 58 fasteners, the fastener cost is 5 yuan, and each fastener cost is 290 yuan; thirdly, 6 universal scaffold wheels are provided, and the cost of the universal scaffold wheels is 50 yuan, and each universal scaffold wheel is 300 yuan; fourthly, the labor cost is 240 yuan; the final total is 3057-membered.
If the anchor rod construction is carried out by adopting the traditional full-distributed support, the step pitch of the vertical rod is 2 meters, the full-distributed support is put into one time to build the protection length of 30 meters, and then the slope surface with the protection length of 120 meters needs to be repeatedly assembled and disassembled for 4 times to complete the anchor rod drilling construction. The main cost is mainly the cost of once putting the steel tube bracket and the labor cost of repeatedly assembling and disassembling the bracket for 4 times. The cost is calculated as follows: steel pipe: 9 × 2+2 × 10+2 × 6+3 × (2.1 +4.13+ 6.2) =87.29 m, 87.29 × 30 ÷ 2=1309.25 m, the steel pipe cost is 16 yuan per meter and the total amount is 20949.6 yuan; 31 fasteners, the fastener cost is 5 yuan, and each fastener cost is 155 yuan; thirdly, the single labor cost is 480 yuan, and the total amount is 1920 yuan after 4 times of repeated assembly and disassembly; the total amount is 23504.6 yuan. The design volume of the large road in south Wucheng city is 2640 meters of slope protection length, and if the traditional full-distributed support construction is used, the total labor cost required by the support assembly and disassembly is as follows: 2640 ÷ 120 × 1920=42240 yuan. And (3) summarizing according to construction experience: the deformation loss rate of the steel pipe support is 2% every 1 time of assembly and disassembly, then the first time of investment of the support with the protection length of 30 meters is required to be assembled and disassembled 2640 ÷ 30=88 times, the loss rate is 88 multiplied by 2% =176%, when the loss rate reaches 100%, the steel pipe must be purchased for the second time, and the price of the fastener is added, so that the cost of the secondary purchase is 21104.6 yuan. The final total cost is 63344.6 yuan.
Compared with the prior art, the construction method has the advantages that the cost is reduced by 60287.6 yuan, and the cost is saved by 95.17%.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A construction method of a stepped movable support for high slope anchor rod construction is characterized in that: the method comprises the following steps:
step S1: setting up a support according to the vertical height and slope rate of an excavated side slope and the included angle between an anchor rod and the horizontal direction, wherein three step frames extending to the surface of the side slope are arranged on one side of the support close to the side slope, the included angle between each step frame and the horizontal direction is equal to the included angle between the anchor rod and the horizontal direction, one ends of the three step frames close to the side slope are respectively positioned at 4 equal points of the vertical height of the side slope, and the three step frames are reinforced through steel pipes;
step S2: laying a bamboo plywood platform on the ladder frame;
step S3: installing a high-pressure down-the-hole drill on the bamboo plywood platform, and drilling holes through the high-pressure down-the-hole drill;
step S4: the anchor rods are lifted up step by step along the three step frames to be placed on different step frames, and anchor rod placing operation is carried out;
step S5: carrying out anchor rod grouting operation;
step S6: respectively sleeving a plurality of scaffold universal wheels at the bottoms of the upright rods of the supports and the longitudinal rod ends of the ladder frames, moving the supports to the next anchor rod application station, detaching the scaffold universal wheels, and performing the processes from the step S3 to the step S5 again;
step S7: and repeating the process of the step S6 until the slope anchor rod construction is finished.
2. The construction method of the stepped movable bracket for high slope anchor rod construction according to claim 1, characterized in that: in step S1, two cables are installed at the top of the bracket in an inclined direction to hold the bracket, one end of each cable is tied to the bracket, the other end of each cable is tied to a steel chisel, and the steel chisel is inserted into the slope for fixing.
3. The construction method of the stepped movable bracket for high slope anchor rod construction according to claim 2, characterized in that: before moving the bracket in step S6, respectively sleeving a plurality of scaffold universal wheels at the bottom of the upright rod of the bracket and the longitudinal rod end of the ladder rack, then unwinding the inhaul cable and pushing the bracket to move to the next anchor rod construction position; meanwhile, after the support is moved to the next anchor rod application station in the step S6, firstly, the pull cables are tied at the top of the support, and then the plurality of scaffold universal wheels are detached.
4. The construction method of the stepped movable bracket for high slope anchor rod construction according to claim 3, characterized in that: when the support is moved in step S6, channel bars are respectively placed on the moving paths of the scaffold universal wheels of the ladder corresponding to the side slopes.
5. The construction method of the stepped movable bracket for high slope anchor rod construction according to claim 4, characterized in that: in step S6, the three ladder frames correspond to the three channel steels, and a length adjustment mechanism is installed between two adjacent channel steels to adjust the distance between the two channel steels; meanwhile, a plurality of hanging rings are welded on the upper side of the upper channel steel, a stay cable is arranged on each hanging ring to pull the channel steel, one end of the stay cable is tied to each hanging ring, the other end of the stay cable is tied to a steel chisel, and the steel chisel is inserted into the top of the side slope to be fixed so as to prevent the channel steel from sliding off; the installation process of the length adjusting mechanism between the two channel steels is as follows: firstly, a plurality of screw rods are welded on one channel steel, then a plurality of corresponding screw rods with opposite thread directions are welded on the other channel steel, and finally a plurality of threaded pipes with reverse threads at two ends are connected to the two corresponding screw rods of the two channel steels.
6. The construction method of the stepped movable bracket for high slope anchor rod construction according to claim 1, characterized in that: in step S4, the construction steps of raising the anchor rods along the three step frames to be placed on different step frames are as follows: (1) enabling one worker to stand on the lower ladder frame, enabling two workers to stand at the top of the side slope, and tying two ends of the anchor rod through two ropes; (2) two workers at the top of the side slope pull the rope, under the assistance of workers at the lower ladder rack, the hook end of the anchor rod is downward, the tip end of the anchor rod is upward pulled to the lower anchor hole, and the hook end of the anchor rod is lapped on the lower ladder rack; (3) the workers at the lower ladder frame climb to the middle ladder frame, two workers at the top of the side slope pull the ropes, the hook end of the anchor rod is downward under the assistance of the workers at the middle ladder frame, the tip end of the anchor rod is upward pulled to the middle anchor hole, and the hook end of the anchor rod is lapped on the middle ladder frame; (4) workers at the middle step frame climb to the upper step frame, two workers at the top of the side slope pull the rope, under the assistance of the workers at the upper step frame, the hook end of the anchor rod is downward, the tip end of the anchor rod is upward pulled to the upper anchor hole, and the hook end of the anchor rod is lapped on the upper step frame.
7. The construction method of the stepped movable bracket for high slope anchor rod construction according to claim 6, characterized in that: in rising the stock step by step along three ladder frame in order to realize placing the construction step on the ladder frame of difference, at ladder frame side installation fixed pulley, when standing the workman on ladder frame supplementary for the rope near the most advanced of stock bypasses the fixed pulley, and adjusts the fixed position of the rope near the most advanced of stock in advance, avoids colliding with the side slope when the most advanced of stock is drawn up.
8. The construction method of the stepped movable bracket for the high slope anchor rod construction according to claim 7, characterized in that: in the anchor rod setting operation of step S4, a worker standing on the ladder rack inserts the tip end of the anchor rod into the corresponding anchor hole first until the entire anchor rod is completely inserted, and when setting the anchor rod positioned on the lower ladder rack, a worker standing on the top of the slope should simultaneously tighten the rope connected to the hook end near the anchor rod.
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| US20190177932A1 (en) * | 2016-12-02 | 2019-06-13 | Dalian University Of Technology | Combined energy dissipation scaffolding structure for preventing falling rock for high and steep slope in seismic region |
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| CN111851979A (en) * | 2020-08-20 | 2020-10-30 | 中国水利水电第四工程局有限公司 | Movable operating system for road slope anchor bolt support |
| CN112252342A (en) * | 2020-10-15 | 2021-01-22 | 浙江世润建创科技发展有限公司 | Steel wire grid net protection and construction method for rock slope broken rock mass |
| CN215107109U (en) * | 2021-06-07 | 2021-12-10 | 甘肃路桥建设集团有限公司 | Sash roof beam stock construction platform |
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