CN114351701B - Manufacturing and using method of hot-melt recyclable anchor cable applied to stone-containing soil - Google Patents

Manufacturing and using method of hot-melt recyclable anchor cable applied to stone-containing soil Download PDF

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CN114351701B
CN114351701B CN202210054804.4A CN202210054804A CN114351701B CN 114351701 B CN114351701 B CN 114351701B CN 202210054804 A CN202210054804 A CN 202210054804A CN 114351701 B CN114351701 B CN 114351701B
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hot
anchor
anchor cable
melt
unbonded steel
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CN114351701A (en
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刘洪波
李水江
叶永康
曾威翔
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Guangzhou Huantou Zengcheng Environmental Protection Energy Co ltd
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Guangzhou Huantou Zengcheng Environmental Protection Energy Co ltd
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Abstract

The invention discloses a manufacturing and using method of a hot-melt type recyclable anchor cable applied to a stone-containing soil, which is applied to a hot-melt type solar power supply recyclable pre-stressed anchor cable device and comprises the following steps of: step 1, preparing anchor cable materials; step 2, setting a hot melting device; step 3, installing an isolation sleeve and an anchoring end; step 4, drilling anchor holes, and placing pre-stressed anchor cables; step 5, prestress tensioning; and 6, recycling the anchor cable. The manufacturing and using method effectively increases the anchoring force of the anchoring body to the unbonded steel strand, and simultaneously uses solar energy as clean energy to improve the overall performance of the prestressed anchor cable device.

Description

Manufacturing and using method of hot-melt recyclable anchor cable applied to stone-containing soil
Technical Field
The invention belongs to the field of prestressed anchor cable equipment, and particularly relates to a manufacturing and using method of a hot-melt recyclable anchor cable applied to stone-containing soil.
Background
In recent years, with the rapid development of engineering technology in China, supporting measures are required to be adopted in the construction process of various side slopes, roads and foundation pit engineering. The prestressed anchor cable support provides additional prestress and pulling resistance for a potential sliding area of a soil body by pre-tensioning the anchor cable, and is widely applied to engineering.
However, the existing prestressed anchor cable supporting method has certain defects. The traditional prestressed anchor cable lacks of a recyclable design, and the anchor cable is left in a soil body after the support is finished, so that on one hand, the problems that the underground space resources are occupied, and the peripheral underground engineering construction is influenced by the underground barriers are increased; on the other hand, serious material waste is caused, and engineering cost is increased.
In particular, in the case of complex terrain soil containing rocks, sharp gravel and the like, the friction between the anchoring end of the traditional anchor cable and the contact surface of the material, the strength and the bonding strength can not meet the anchoring requirement, and the problem that the steel strand is separated from the anchoring body during working exists. Meanwhile, the grouting body near the anchoring end is easily damaged due to the formation of a stress concentration area after being pressed, so that prestress loss is caused; if the traditional chemical power source is adopted to heat the hot-melting material, the problems of high energy consumption, difficult erection of a power transmission line, complex maintenance of power generation equipment and the like exist. Therefore, the design of a manufacturing and using method of the hot-melt type recoverable anchor cable applied to the soil containing stone is the direction of research.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a manufacturing and using method of a hot-melt recoverable anchor cable applied to a stone-containing soil, wherein an anchor cable anchoring end bearing plate is designed to a circular truncated cone type through hole, so that the bearing plate generates axial anchoring resistance and radial shrinkage hoop pressure, and meanwhile, the tail ends of multi-strand hinged steel cables are scattered and puffed, so that the anchoring force of an anchor body to an unbonded steel strand is effectively increased, and the integral performance of a prestressed anchor cable device is improved.
In order to achieve the above object, the present invention provides a method for manufacturing and using a hot-melt type recyclable anchor cable containing stone soil, which is applied to a hot-melt type solar power supply recyclable pre-stressed anchor cable device, comprising the steps of:
the hot-melt solar power supply recoverable prestressed anchor cable device comprises a bearing plate and unbonded steel strands, wherein the center of the bearing plate is provided with a through hole facing to a circular truncated cone; the electric heating layer is fixedly arranged on the side wall of the truncated cone-shaped through hole on one side of the bearing plate, which is far away from the anchoring plate; the through hole is also filled with a hot-melting material; the first ends of the unbonded steel strands sequentially penetrate through the through holes of the isolation sleeve and the bearing plate and are anchored in the hot-melt material, and the second ends of the unbonded steel strands are limited and anchored on the anchoring plate through the anchoring nuts;
step 1, preparing anchor cable materials;
rust removal and polishing are carried out on the unbonded steel strand, and anticorrosive grease is smeared on the surface of the unbonded steel strand for rust prevention treatment;
step 2, setting a hot melting device;
an insulating wire is arranged on the inner wall of the isolation sleeve, an electric heating layer is fixed on the side wall of the circular truncated cone-shaped through hole on one side of the bearing plate, which is far away from the anchoring plate, and the electric heating layer and the insulating wire are connected;
step 3, installing an isolation sleeve and an anchoring end;
after one end of the unbonded steel strand sequentially passes through the opposite round table type through holes in the centers of the isolation sleeve and the bearing plate, decomposing a multi-strand hinging line at the end of the unbonded steel strand, so that a plurality of strands of the unbonded steel strand are scattered at the tail end to form an expansion state;
filling a hot-melt material in the height range of the electric heating layer, bonding the upper part of the hot-melt material to the isolation sleeve, completely wrapping the puffed end part of the unbonded steel strand on the lower part of the hot-melt material, and installing a waterproof isolation cover on the lower part of the hot-melt material after the hot-melt material is solidified;
step 4, drilling anchor holes, and placing pre-stressed anchor cables;
drilling anchor holes, binding grouting pipes on the side surfaces of the manufactured anchor cables, placing the anchor cables into drilled holes, grouting and fixing anchor plates;
step 5, prestress tensioning;
when the strength of the concrete reaches a set standard, carrying out prestress tensioning on the unbonded steel strand, and installing an anchor nut for limiting and anchoring;
step 6, anchor cable recovery;
step 61, solar heating;
arranging a solar photovoltaic power generation device on the anchor rope supporting surface, connecting the power generation device with an insulating wire, continuously heating the electric heating layer by utilizing solar power generation to melt the hot-melt material, and relieving the anchoring force of the end part of the anchor rope;
step 62, anchor cable recovery;
and (5) removing the anchor plate and the anchor nut, and recovering the unbonded steel strand.
Further, the anchor rope preparation in the step 1 comprises rust removal and polishing of unbonded steel strands meeting the length requirement, and anticorrosive grease is smeared on the surfaces of the unbonded steel strands for rust prevention treatment.
Further, the anchor hole drilling in the step 4 further comprises a measuring paying-off and drilling positioning process.
Further, the grouting in the step 4 comprises primary grouting and secondary grouting.
Further, the setting standard in the step 5 is that the concrete strength reaches 75%.
Further, in the step 5, a jack is used for prestress tensioning of the unbonded steel strand.
Further, in the step 6, the unbonded steel strand is recovered by using a winch.
The beneficial effects of the invention are as follows:
1. according to the invention, the bearing plate at the anchoring end of the anchor cable is designed as the upper concave downward inverted truncated cone-shaped through hole, and the pulling force of the unbonded steel strand during prestress tensioning is transmitted to the bearing plate through the hot-melt material, so that the bearing plate generates the axial anchoring resistance and the radial shrinkage hoop pressure, and the anchoring force of the anchoring body on the unbonded steel strand is effectively increased. Meanwhile, the bearing plate applies pressure which is converged at a certain point of the axis of the anchor cable to nearby grouting bodies through the round table type side wall, so that the contact area of a compressive stress concentration area of the grouting bodies is increased, and the grouting bodies generate radial shrinkage hoop pressure on unbonded steel strands; meanwhile, the strands of the multi-strand hinged steel ropes are scattered at the tail ends to be puffed, and hot-melt materials are sealed in the multi-strand hinged steel ropes, so that the anchoring force of the unbonded steel strands is further increased, and the structure does not prevent the recovery of the steel ropes after use;
2. according to the invention, by adopting the non-metal bearing plate, rock-like material environment is kept around the anchoring end of the prestressed anchor cable, and the aim of balancing the strength of the material in the supporting area is fulfilled, so that the environment after recycling of the hot-melt anchor cable is harmless and non-metallized;
3. according to the invention, solar energy is used as clean energy, a solar photovoltaic power generation device is utilized to form a solar power supply for heating the hot-melting material, the policy guidelines of the application of new energy are greatly promoted in the state are responded, and the problems of high energy consumption, difficult erection of a power transmission line, complex maintenance of power generation equipment and the like of the traditional chemical power supply are simultaneously improved. The solar photovoltaic power generation device can continuously supply power to the electric heating layer in the bearing plate, so that the time of steps of carrying, installing, waiting for heating and the like required by using a traditional chemical power supply is saved, the on-site labor resource is liberated, and the time and the economic cost are saved.
Drawings
FIG. 1 is a schematic view of one embodiment of a hot melt solar powered recoverable pre-stressed anchor cable device of the present invention;
FIG. 2 is a schematic view of the structure of a carrier plate according to an embodiment of the present invention;
FIG. 3 is a regional plan view of the solar photovoltaic power generation device of the present invention as a solar power source for powering a recoverable anchor cable device;
fig. 4 is a schematic structural view of an unbonded strand end of an embodiment of the present invention.
In the figure:
1-bearing plate, 2-electric heating layer, 3-hot melt material, 4-waterproof isolation cover, 5-unbonded steel strand, 6-insulated wire, 7-isolation sleeve, 8-anchor plate, 9-anchor nut, 10-solar photovoltaic power generation device.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made with reference to fig. 1 to 3 and examples.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The method is applied to a hot-melt solar power supply recoverable pre-stressed anchor cable device, and as an embodiment, as shown in figure 1, an anchor end of the hot-melt solar power supply recoverable pre-stressed anchor cable device is provided with an unbonded steel strand 5, and the device comprises a bearing plate 1, an electric heating layer 2, a hot-melt material 3 and a waterproof isolation cover 4 which are designed to be opposite to a circular truncated cone-shaped through hole. The unbonded steel strands 5 penetrate through the opposite circular truncated cone-shaped through holes and are anchored in the wrapping layer of the hot-melt material 3. The pulling force of the unbonded steel strand 5 during prestress tensioning is transmitted to the bearing plate 1 through the hot-melt material 3, so that the bearing plate 1 generates the axial anchoring resistance and the radial shrinkage circumferential pressure, and the anchoring force of the anchoring body to the unbonded steel strand 5 is effectively increased. The electric heating layer 2 is annular and is arranged on the side wall of the circular truncated cone-shaped through hole, which is contacted with the hot melting material 3, of the bearing plate 1, the radial dimension of the electric heating layer is smaller than or equal to that of the circular truncated cone-shaped through hole, the electric heating rod can be uniformly distributed in an annular mode, the electric heating wire is uniformly distributed in a surrounding radial mode, and the waterproof isolation cover 4 is arranged outside the electric heating rod. As shown in fig. 2, the hot-melt solar power supply recoverable prestressed anchor cable device further comprises an insulated wire 6, an isolating sleeve 7, an anchor plate 8 and an anchor nut 9. Insulated wires 6 are arranged inside the insulating sleeve 7, connecting the electrically heated layer 2 and an external power supply device. The isolation sleeve 7 is in seamless connection with the inner surface of the bearing plate 1 by adopting the hot-melting material 3 to bond the sleeve, and the isolation sleeve 7 is in seamless connection with the anchor plate 8 by adopting an instant adhesive.
As shown in fig. 3, a solar photovoltaic power generation device 10 is arranged outside the hot-melt solar power supply recyclable pre-stress anchor cable device, solar energy is used as clean energy to heat the hot-melt material 3, and the pre-stress anchor cable anchors are uniformly distributed on four rectangular corner points taking the solar photovoltaic power generation device 10 as a rectangular center.
The invention discloses a manufacturing and using method of a hot-melt recyclable anchor cable applied to a stone-containing soil, which comprises the following steps:
step 1, preparing anchor cable materials;
the unbonded steel strand 5 and the isolation sleeve 7 which meet the design length are prepared, the unbonded steel strand 5 is subjected to rust removal and polishing, and the surface is smeared with anti-corrosion grease for rust prevention treatment.
Step 2, setting a hot melting device;
and installing an isolation sleeve 7, arranging an insulated wire 6 on the inner wall of the isolation sleeve 7, fixing the electric heating layer 2 on the side wall of the circular truncated cone-shaped through hole on one side, far away from the anchor plate 8, of the bearing plate 1, and connecting the electric heating layer 2 and the insulated wire 6. The bearing plate 1 can be made of rock-like materials or cement pouring and forming, and according to the requirement, the device adopts the bearing plate 1 made of nonmetal materials, so that the rock-like material environment can be kept around the anchoring end of the prestressed anchor cable, the strength balance of the materials in the supporting area is taken as a target, and the environment harmlessness and no metallization after the hot-melt anchor cable is recovered are realized;
step 3, installing an isolation sleeve and an anchoring end;
after one end of the unbonded steel strand 5 sequentially passes through the isolation sleeve 7 and the opposite round table type through hole in the center of the bearing plate 1, decomposing a plurality of strands of hinging lines at the end of the unbonded steel strand 5, and dispersing the strands at the tail end to form a swelling state as shown in figure 4;
the hot-melt material is filled in the height range of the electric heating layer 2, so that the upper part of the hot-melt material 3 is bonded with the isolation sleeve, the lower part of the hot-melt material completely wraps the expanded end part of the unbonded steel strand 5, and in actual operation, the lower part of the hot-melt material 3 can form a bulge, such as a water drop shape in the figure 1, when being filled, so as to completely wrap the expanded end part of the unbonded steel strand 5, and the anchoring force is increased. After the hot-melt material 3 is solidified, a waterproof isolation cover is arranged at the lower part of the hot-melt material;
the anchor cable anchoring end bearing plate 1 is designed into an upper concave downward inverted circular truncated cone-shaped through hole, and the pulling force of the unbonded steel stranded wires 5 during prestress tensioning is transmitted to the bearing plate 1 through the hot-melt material 3, so that the bearing plate 1 generates axial anchoring resistance and radial shrinkage hoop pressure, and the anchoring force of an anchoring body to the unbonded steel stranded wires 5 is effectively increased. Meanwhile, the bearing plate 1 applies pressure which is converged at a certain point of the axis of the anchor cable to nearby grouting bodies through the round table type side wall, so that the contact area of the compressive stress concentration area of the grouting bodies is increased on one hand, and on the other hand, the grouting bodies generate radial shrinkage hoop pressure on unbonded steel strands; meanwhile, the multiple strands of the steel ropes hinged with the unbonded steel strands 5 are scattered at the tail end, the expansion treatment is carried out on the structure, and the hot-melt materials 3 are sealed, so that the anchoring force of the unbonded steel strands 5 during stretching is further increased, and the structure does not prevent the recovery of the unbonded steel strands 5 after use;
step 4, drilling anchor holes, and placing pre-stressed anchor cables;
measuring paying-off, drilling positioning and anchor hole drilling, binding a grouting pipe on the side surface of the manufactured anchor cable, placing the anchor cable into a drill hole, performing primary grouting and secondary grouting, and fixing an anchor plate 8; the spacer sleeve 7 and the anchor plate 8 may be seamlessly joined using a transient adhesive.
Step 5, prestress tensioning;
and (3) prestress tensioning, namely when the strength of the concrete reaches 75%, using a jack to perform prestress tensioning on the unbonded steel strand 5, and installing an anchor nut 9 for limiting and anchoring.
Step 6, anchor cable recovery, which comprises the following specific steps:
step 61, solar heating;
the solar photovoltaic power generation device 10 is arranged on the anchor rope supporting surface, the insulating wire 6 is connected, and the solar power generation is utilized to continuously heat the electric heating layer 2, so that the hot-melt material 3 is melted. Along with the heated and melted part of the hot-melt material 3, the end parts of the unbonded steel strands 5 gradually move to one side of the anchoring plate 8 under the action of prestress, so that the heated and melted part of the hot-melt material 3 is promoted to contact with the anchoring force of the end parts of the anchor cables.
Step 62, anchor cable recovery;
and (3) removing the anchor plate and the anchor nut, recovering the unbonded steel strand 5 by using a winch, and recovering the expanded strands at the tail end of the unbonded steel strand 5 in tension to form a bundle, wherein the bundle is integrally recovered under the action of the winch.
The invention adopts a non-metal bearing plate, such as: the bearing plate can be made of cement. The rock-like material environment is kept around the anchoring end of the prestressed anchor cable, and the aim of balancing the strength of the material in the supporting area is fulfilled, so that the environment after the hot-melt anchor cable is recycled is harmless and free of metallization;
meanwhile, solar energy is used as clean energy, a solar photovoltaic power generation device is utilized to form a solar power supply to heat a hot-melting material, and the problems that the traditional chemical power supply is high in energy consumption, difficult in power transmission line erection, complex in power generation equipment maintenance and the like are solved in response to policy guidelines of the state that new energy application is greatly promoted. The solar photovoltaic power generation device can continuously supply power to the electric heating layer in the bearing plate, so that the time of steps of carrying, installing, waiting for heating and the like required by using a traditional chemical power supply is saved, the on-site labor resource is liberated, and the time and the economic cost are saved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.

Claims (7)

1. The manufacturing and using method of the hot-melt type recyclable anchor cable applied to the soil containing stone is characterized by being applied to a hot-melt type solar power supply recyclable pre-stressed anchor cable device, and comprising the following steps of:
the hot-melt solar power supply recoverable prestressed anchor cable device comprises a bearing plate and unbonded steel strands, wherein the center of the bearing plate is provided with a through hole facing to a circular truncated cone; the electric heating layer is fixedly arranged on the side wall of the truncated cone-shaped through hole on one side of the bearing plate, which is far away from the anchoring plate; the through hole is also filled with a hot-melting material; the first ends of the unbonded steel strands sequentially penetrate through the through holes of the isolation sleeve and the bearing plate and are anchored in the hot-melt material, and the second ends of the unbonded steel strands are limited and anchored on the anchoring plate through the anchoring nuts; the bearing plate with the upward concave downward reverse opposite round table type through holes is made of rock-like materials or cement poured and molded, and the rock-like material environment is kept around the anchoring end of the prestressed anchor cable, so that the environment harmlessness and no metallization of the recycled hot-melt anchor cable are realized;
step 1, preparing anchor cable materials;
rust removal and polishing are carried out on the unbonded steel strand, and anticorrosive grease is smeared on the surface of the unbonded steel strand for rust prevention treatment;
step 2, setting a hot melting device;
an insulating wire is arranged on the inner wall of the isolation sleeve, an electric heating layer is fixed on the side wall of the circular truncated cone-shaped through hole on one side of the bearing plate, which is far away from the anchoring plate, and the electric heating layer and the insulating wire are connected;
step 3, installing an isolation sleeve and an anchoring end;
after one end of the unbonded steel strand sequentially passes through the opposite round table type through holes in the centers of the isolation sleeve and the bearing plate, decomposing a multi-strand hinging line at the end of the unbonded steel strand, so that a plurality of strands of the unbonded steel strand are scattered at the tail end to form an expansion state;
filling a hot-melt material in the height range of the electric heating layer, bonding the upper part of the hot-melt material to the isolation sleeve, completely wrapping the puffed end part of the unbonded steel strand on the lower part of the hot-melt material, and installing a waterproof isolation cover on the lower part of the hot-melt material after the hot-melt material is solidified;
step 4, drilling anchor holes, and placing pre-stressed anchor cables;
drilling anchor holes, binding grouting pipes on the side surfaces of the manufactured anchor cables, placing the anchor cables into drilled holes, grouting and fixing anchor plates;
step 5, prestress tensioning;
when the strength of the concrete reaches a set standard, carrying out prestress tensioning on the unbonded steel strand, and installing an anchor nut for limiting and anchoring;
step 6, anchor cable recovery;
step 61, solar heating;
arranging a solar photovoltaic power generation device on the anchor rope supporting surface, connecting the power generation device with an insulating wire, continuously heating the electric heating layer by utilizing solar power generation to melt the hot-melt material, and relieving the anchoring force of the end part of the anchor rope;
step 62, anchor cable recovery;
and (5) removing the anchor plate and the anchor nut, and recovering the unbonded steel strand.
2. The method for manufacturing and using the hot-melt type recoverable anchor cable with the stone-containing soil according to claim 1, wherein the anchor cable preparation in the step 1 comprises rust removal and polishing of unbonded steel strands meeting the length requirement, and anticorrosive grease is smeared on the surfaces for rust prevention.
3. The method for manufacturing and using the hot-melt type recoverable anchor cable applied to the soil containing stone according to claim 1, wherein the anchor hole drilling in the step 4 further comprises the working procedures of measuring paying-off and drilling positioning.
4. The method of claim 1, wherein the grouting of step 4 comprises primary grouting and secondary grouting.
5. The method for manufacturing and using the hot-melt type recyclable anchor cable for the earthy quality according to claim 1, wherein the setting standard in the step 5 is that the concrete strength reaches 75%.
6. The method for manufacturing and using the hot-melt type recoverable anchor cable with stone-containing soil according to claim 1, wherein the jack is used for prestress tensioning of the unbonded steel strand in the step 5.
7. The method of claim 1, wherein the step 6 is performed by recovering unbonded steel strands by using a winch.
CN202210054804.4A 2022-01-18 2022-01-18 Manufacturing and using method of hot-melt recyclable anchor cable applied to stone-containing soil Active CN114351701B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452108A (en) * 2013-01-18 2013-12-18 苏州市能工基础工程有限责任公司 Anchor with tapered plug and cores convenient to disassemble and method for recycling cores of anchor
CN206396755U (en) * 2016-12-29 2017-08-11 湖北工业大学 A kind of dismountable ecological environment-friendly type anchor pole

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452108A (en) * 2013-01-18 2013-12-18 苏州市能工基础工程有限责任公司 Anchor with tapered plug and cores convenient to disassemble and method for recycling cores of anchor
CN206396755U (en) * 2016-12-29 2017-08-11 湖北工业大学 A kind of dismountable ecological environment-friendly type anchor pole

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