CN112681347A - Combined supporting structure for treating dangerous rock mass and construction method thereof - Google Patents
Combined supporting structure for treating dangerous rock mass and construction method thereof Download PDFInfo
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- CN112681347A CN112681347A CN202011549886.7A CN202011549886A CN112681347A CN 112681347 A CN112681347 A CN 112681347A CN 202011549886 A CN202011549886 A CN 202011549886A CN 112681347 A CN112681347 A CN 112681347A
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- 239000011435 rock Substances 0.000 title claims abstract description 109
- 238000010276 construction Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 239000011178 precast concrete Substances 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 10
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000003864 humus Substances 0.000 claims description 3
- 239000011378 shotcrete Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 3
- 241000196324 Embryophyta Species 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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Abstract
The invention discloses a combined supporting structure for treating dangerous rock masses and a construction method thereof, wherein the combined supporting structure comprises miniature steel pipe piles which are arranged in double rows and arranged on the lower dangerous rock mass, and pile top crown beams are arranged at the tops of the miniature steel pipe piles; precast concrete baffles are arranged between the miniature steel pipe piles, are sprayed and mixed to cover by adopting mesh hanging nets, and are provided with PVC drain pipes; backfilling the space between the miniature steel pipe pile and the dangerous rock mass by adopting backfilled concrete; the slope of dangerous rock mass upper portion sets up the sash roof beam, and sash roof beam node department sets up prestressed anchorage cable or stock, and sash roof beam bottom extends to pile bolck crown beam, is equipped with the backfill in the sash roof beam, plants the grass seed in the backfill, plays the afforestation effect. Because the micro-pile construction speed is high, the development of dangerous rock body deformation can be preliminarily controlled in a short time, and the micro-pile construction method has higher efficiency; meanwhile, the miniature steel pipe pile is small in pile diameter, simple in design and composition, low in requirement on driving equipment and good in economical efficiency.
Description
Technical Field
The invention relates to a dangerous rock mass treatment method which can be developed into a landslide, in particular to a combined supporting structure for treating dangerous rock masses and a construction method thereof.
Background
Dangerous rock bodies are mostly positioned on steep side slopes or cliffs and are cut by a plurality of groups of structural surfaces, although instability does not occur, the dangerous rock bodies have instability damage conditions, and under the action of external forces such as gravity, weathering force, earthquake, osmotic pressure, external environment vibration interference and the like, the dangerous rock bodies can be separated from parent rocks to cause instability damage, casualties or property loss of people under the dangerous rock bodies can be caused, and the dangerous rock bodies are typical geological disasters. The prior art relates to dangerous rock mass treatment methods which are roughly as follows:
the first is a large dumping type dangerous rock mass maintenance structure. The method provides a building envelope for managing large dumping dangerous rock masses, which comprises mother rock masses and dangerous rock masses; set up the stock on the mother rock body on dangerous rock mass left and right side respectively, bypass dangerous rock mass, utilize wire rope to connect left and right sides stock respectively, play the effect of consolidating and administering dangerous rock mass.
The second method is a method for treating the toppling destructive dangerous rock mass, which is based on the 'inverse mechanism' of forming the deformation of the dangerous rock mass, namely, the deformation opposite to the conventional toppling deformation direction is generated, so that the dangerous rock mass has the tendency of inclining to a trailing edge tension fracture, and the inclined dangerous rock mass is righted, thereby increasing the stability coefficient of the dangerous rock mass.
The third type is a quick reinforcing apparatus for dangerous rock mass of side slope, which comprises an oblique support member, wherein the top end of the oblique support member extends into a shallow groove on the lower surface of the dangerous rock mass of side slope, a steel base plate is arranged at the bottom of the oblique support member, and the steel base plate is embedded in a deep groove below the dangerous rock mass of side slope. The shallow grooves and the deep grooves are filled and leveled up by concrete through the cooperation of the oblique supporting piece and the channel steel base plate with the oblique anchor rod, so that the supporting system is fully contacted with the dangerous rock mass, and the aim of quickly reinforcing the side slope dangerous rock mass is fulfilled.
The first large-scale dumping dangerous rock mass maintenance structure has the problems that: the reinforcing treatment measures are single, when the scale of dangerous rock bodies is large or blasting removal cannot be carried out, the treatment effect is often difficult to achieve by adopting a single treatment method, and the safety and stability of the method cannot be guaranteed. The second method for treating the toppling destructive dangerous rock mass has the following problems: when the crack of the dangerous rock mass and the development stability of the interlayer are poor, a horizontal hole is formed in a weak layer below the dangerous rock mass, and the construction risk is high. The third kind side slope dangerous rock mass rapid reinforcement device has the problems that: the maintenance structure adopts a relatively single mode, and is difficult to ensure the safety and stability of dangerous rock bodies with wide cracks, large scale and complexity.
Therefore, the above prior art is still not ideal.
Disclosure of Invention
In view of the defects in the aspect of the existing dangerous rock mass treatment technology, the invention aims to provide a micro pile and anchor rod (cable) mixed combined supporting structure for treating dangerous rock masses and a construction method thereof, aiming at dangerous rock masses which can be developed into landslides.
The invention is realized by the following steps:
the utility model provides a administer joint supporting construction of dangerous rock mass which characterized in that: the combined supporting structure adopts a micro pile combined anchor rod or anchor cable combined supporting structure, and comprises double rows of micro steel pipe piles arranged on a lower dangerous rock mass, wherein each micro steel pipe pile comprises a round hollow prefabricated steel pipe pile body with the diameter not more than 300mm and three built-in reinforcing steel bundles, and the length of the micro steel pipe pile extending below the ground is not less than 3m so as to ensure that the micro pile has an embedded section with enough length; the top of the miniature steel pipe pile is provided with a pile top crown beam which connects the double rows of miniature steel pipe piles together, so that the miniature steel pipe piles are integrally stressed in a coordinated manner; precast concrete baffles are arranged between the miniature steel pipe piles, the precast concrete baffles are covered by mesh hanging, spraying and mixing, and PVC drain pipes are arranged in the miniature steel pipe piles and penetrate through the meshes; backfilling concrete is adopted between the miniature steel pipe pile and the dangerous rock mass to enable the lower part of the dangerous rock mass to be in full contact with the ground; the slope of dangerous rock mass upper portion sets up the sash roof beam, and sash roof beam node department sets up prestressed anchorage cable or stock, and sash roof beam bottom extends to pile bolck crown beam, is equipped with the backfill in the sash roof beam, plants the grass seed in the backfill, plays the afforestation effect.
Furthermore, the mesh on the precast concrete baffle adopts a double-layer reinforcing mesh, the diameter of the reinforcing mesh is 8-10mm, and the sprayed concrete is labeled as C25 or C30; the backfill concrete is labeled as C25 or C30.
Furthermore, the size of the cross section of the sash beams is 300 multiplied by 300mm or 400 multiplied by 400mm, the space between the sash beams is 2.5-3.0 m, and the sash beams are arranged along the slope; the prestressed anchor cable or the anchor rod is prestressed, the anchor rod is of a full-bonding type and is designed to be arranged on the upper portion and the lower portion of the dangerous rock body, the prestressed anchor cable is adopted in the middle of the anchor rod, the anchoring section of the prestressed anchor cable extends into the dangerous rock body to be weathered for a certain depth so as to ensure that the anchoring section has enough anchoring force, and the outer anchor head of the prestressed anchor cable or the anchor rod and the sash beam are poured together.
The construction method of the combined supporting structure for treating the dangerous rock mass comprises the following steps:
step 1, in the range of dangerous rock mass to be treated, firstly implementing double rows of miniature steel pipe piles at the lower part, embedding the bottoms of the miniature steel pipe piles into a certain depth range below the ground, and arranging pile top crown beams at the tops of the miniature steel pipe piles; step 2, arranging precast concrete baffles between the miniature steel pipe piles, pouring concrete while installing the precast concrete baffles, and finally arranging PVC drain pipes between the miniature steel pipe piles for draining fracture water in dangerous rock masses to finally complete construction of the lower part structure of the dangerous rock masses; step 3, after the construction of the lower part of the dangerous rock mass is finished and reaches a certain design age, beginning to start the construction of the upper part of the dangerous rock mass, before the construction, cleaning up residues and humus on the surface of the dangerous rock mass, and finishing the slope surface according to a certain slope ratio; step 4, hanging net spraying and mixing are adopted on the slope, double-layer nets are adopted as net sheets, after the hanging net spraying and mixing are completed, a lattice beam and a prestressed cable or an anchor rod are implemented, the prestressed cable or the anchor rod is anchored at the node of the lattice beam, and a drain hole with a certain depth is arranged in the lattice beam and used for draining fracture water in the dangerous rock mass; and 5, finally, backfilling soil is arranged in the lattice beam to cover a certain thickness for planting grass for greening, so that the effect of beautifying the environment is achieved.
The invention is a micro pile and anchor rod (cable) mixed combined supporting structure for treating dangerous rock mass and a construction method thereof, because the micro pile has high construction speed, the development of dangerous rock mass deformation can be preliminarily controlled in a short time, and the efficiency is higher; meanwhile, the miniature steel pipe pile is small in pile diameter, simple in design and composition, low in requirement on driving equipment and good in economical efficiency. In addition, the dangerous rock mass can be permanently reinforced by the measures of net hanging, spraying and mixing, lattice beam, pre-stressed anchor rod (cable) mixing and drainage on the upper part of the dangerous rock mass, so that the safety and stability of the dangerous rock mass are ensured. Finally, the lattice beams are covered with soil for planting grass, so as to green the environment and achieve the effect of beautifying the environment.
Specifically, compared with the prior art, the invention has the following prominent substantive features and remarkable progress:
(1) because the micro-pile construction speed is fast, the development of dangerous rock body deformation can be preliminarily controlled in a short time, and the micro-pile construction method has higher efficiency. If necessary, time can be strived for the reinforcement treatment of the subsequent dangerous rock mass;
(2) the pile diameter of the miniature pile is small, the design and composition are simple, the requirement on driving equipment is not high, and the miniature pile has good economy;
(3) the dangerous rock mass can be permanently reinforced by the measures of hanging net, spraying and mixing, lattice beam, prestressed anchor rod (cable) and drainage on the upper part of the dangerous rock mass, so that the safety and stability of the dangerous rock mass are ensured;
(4) the anchor rod and the anchor cable are mixed, so that the construction cost can be saved, and the construction period can be shortened.
(5) The lattice beams are covered with soil for planting grass, so as to green the environment and achieve the effect of beautifying the environment.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
fig. 2 is a detailed construction view of the present invention.
The labels in the figures are: 1-miniature steel pipe pile, 2-backfilled concrete, 3-PVC drain pipe, 4-pile top crown beam, 5-ground, 6-precast concrete baffle, 7-prestressed anchor cable, 8-prestressed anchor rod, 9-lattice beam, 10-backfilled soil and 11-critical rock original terrain line.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the structure of the invention mainly comprises a miniature steel pipe pile 1, concrete 2, a PVC drain pipe 3, a pile top crown beam 4, a ground 5, a precast concrete baffle 6, a prestressed anchor cable 7, a prestressed anchor rod 8, a lattice beam 9, earth covering backfill 10, a dangerous rock original terrain line 11 and the like. During specific implementation, design a double miniature steel-pipe pile 1 in lower dangerous rock mass, including the diameter be no more than 300 mm's circular cavity prefabricated steel pipe pile body, three built-in tendons, miniature steel-pipe pile 1 stretches into the ground below no less than 3m to guarantee that miniature steel-pipe pile 1 has the embedded section of sufficient length, 1 tops of miniature steel-pipe pile set up a stakeThe crown beam 4 is jacked, and the double rows of miniature steel pipe piles 1 are connected, so that the integral synergistic stress is realized, and the integral stability is better; precast concrete baffles 6 are arranged among the miniature steel pipe piles 1, a net is hung on the precast concrete baffles 6 for spraying and mixing, a double-layer reinforcing steel bar net is adopted as a net piece, the diameter of the reinforcing steel bar is 8-10mm, and the label of the sprayed and mixed concrete is C25 or C30; at the same time, the micro steel pipe piles 1 are arranged between
The water discharge pipe 3 is used for discharging the fracture water of the dangerous rock mass so as to prevent the fracture water from generating excessive water pressure; the gap between the miniature steel pipe pile 1 and the dangerous rock mass is backfilled by C25 or C30 backfilled concrete 2, so that the lower dangerous rock mass is fully contacted with the ground, the lower dangerous rock mass is prevented from collapsing and being damaged, and the safety and stability of the lower dangerous rock mass are guaranteed. The upper dangerous rock mass is supported and treated by combining a lattice beam 9 with a prestressed anchor cable 7 or an anchor rod 8, the size of the section of the lattice beam 9 is 300 multiplied by 300mm or 400 multiplied by 400mm, the distance between the lattice beams 9 is 2.5-3.0 m, the prestressed anchor cable 7 or the anchor rod 8 is arranged at the node of the lattice beam 9, the prestressed anchor cable 7 or the anchor rod 8 is constructed with prestress, the length of the prestressed anchor cable 7 or the anchor rod 8 and the application size of the prestress are comprehensively determined according to the scale of dangerous rock mass, the development degree of cracks and the like, the anchor rod 8 is of a full-bonding type and is designed and arranged at the upper part and the lower part of the dangerous rock mass, the prestressed anchor cable 7 is adopted at the middle part, the anchoring section of the prestressed anchor cable 7 needs to extend into the dangerous rock mass to be weathered for a certain depth so as to ensure that the dangerous rock mass has enough anchoring force, and the prestressed anchor head outside. And the gap between the frame beams 9 is covered by backfill soil 10, and grass seeds are planted for greening design.
The miniature steel pipe pile and the prestressed anchor rod (cable) are mixed to use the combined supporting structure to treat the dangerous rock mass, so that the dangerous rock mass can be quickly preliminarily treated, the winning time for the permanent reinforcement of the dangerous rock mass can be prolonged, the environment can be greened, and the concrete method comprises the following steps:
step 1, in the range of dangerous rock mass to be treated, firstly implementing double rows of miniature steel pipe piles at the lower part, embedding the bottoms of the miniature piles into the ground within a certain depth range, and arranging crown beams at the tops of the miniature piles;
and 5, finally covering backfill soil 10 with a certain thickness in the sash beams 9 for planting grass for greening to achieve the effect of beautifying the environment.
Of course, the above is only a specific application example of the present invention, and other embodiments of the present invention are also within the scope of the present invention.
Claims (4)
1. The utility model provides a administer joint supporting construction of dangerous rock mass which characterized in that: the combined supporting structure adopts a micro pile combined anchor rod or anchor cable combined supporting structure, and comprises double rows of micro steel pipe piles (1) arranged on a lower dangerous rock body, wherein each micro steel pipe pile (1) comprises a round hollow prefabricated steel pipe pile body with the diameter not greater than 300mm and three built-in reinforcing steel bundles, and the micro steel pipe pile (1) extends into the ground to be not less than 3m so as to ensure that the micro pile has an embedded section with enough length; the top of the miniature steel pipe pile (1) is provided with a pile top crown beam (4), and the double rows of miniature steel pipe piles (1) are connected by the pile top crown beam (4) to ensure that the whole miniature steel pipe piles are stressed cooperatively; precast concrete baffles (6) are arranged between the miniature steel pipe piles (1), the precast concrete baffles (6) are sprayed, mixed and covered by mesh hanging, and PVC drain pipes (3) are arranged in the miniature steel pipe piles (1), and the PVC drain pipes (3) penetrate through the meshes; the space between the miniature steel pipe pile (1) and the dangerous rock mass is backfilled by adopting backfilled concrete (2), so that the lower part of the dangerous rock mass is fully contacted with the ground (5); the slope surface of the upper portion of the dangerous rock body is provided with the lattice beam (9), the node of the lattice beam (9) is provided with the prestressed anchor cable (7) or the anchor rod (8), the bottom of the lattice beam (9) extends to the pile top crown beam (4), backfill soil (10) is arranged in the lattice beam (9), grass seeds are planted in the backfill soil (10), and the greening effect is achieved.
2. The combined supporting structure for managing dangerous rock masses according to claim 1, wherein: the net sheets on the precast concrete baffle (6) adopt double-layer reinforcing steel bar nets, the diameter of the reinforcing steel bars is 8-10mm, and the mark of sprayed concrete is C25 or C30; the backfill concrete (2) is marked with the reference number C25 or C30.
3. The combined supporting structure for managing dangerous rock masses according to claim 1, wherein: the size of the section of each lattice beam (9) is 300 multiplied by 300mm or 400 multiplied by 400mm, the space between the lattice beams (9) is 2.5-3.0 m, and the lattice beams are arranged along the slope; the prestressed anchor cable (7) or the anchor rod (8) is constructed in a prestressed mode, the anchor rod (8) is of a full-bonding type and is designed to be arranged on the upper portion and the lower portion of a dangerous rock body, the prestressed anchor cable (7) is adopted in the middle of the anchor rod, an anchoring section of the prestressed anchor cable (7) extends into the dangerous rock body to be weathered for a certain depth so as to guarantee that the anchor rod has enough anchoring force, and an outer anchor head of the prestressed anchor cable (7) or the anchor rod (8) and the sash beam (9) are poured together.
4. A construction method of a combined supporting structure for managing a dangerous rock mass according to any one of claims 1 to 3, characterized by comprising the steps of:
step 1, in the range of dangerous rock mass to be treated, firstly implementing double rows of miniature steel pipe piles (1) at the lower part, embedding the bottoms of the miniature steel pipe piles (1) into the ground within a certain depth range, and arranging pile top crown beams (4) at the tops of the miniature steel pipe piles (1);
step 2, arranging precast concrete baffles (6) between the miniature steel pipe piles (1), pouring concrete while installing the precast concrete baffles (6), and finally arranging PVC drain pipes (3) between the miniature steel pipe piles (1) for draining fracture water in dangerous rock masses and finally completing construction of the lower part structure of the dangerous rock masses;
step 3, after the construction of the lower part of the dangerous rock mass is finished and reaches a certain design age, beginning to start the construction of the upper part of the dangerous rock mass, before the construction, cleaning up residues and humus on the surface of the dangerous rock mass, and finishing the slope surface according to a certain slope ratio;
step 4, hanging net spraying and mixing are adopted on the slope, double-layer nets are adopted for meshes, after the hanging net spraying and mixing are completed, a lattice beam (9) and a prestressed cable (7) or an anchor rod (8) are implemented, the prestressed cable (7) or the anchor rod (8) is anchored at a node of the lattice beam (9), and a drain hole with a certain depth is formed in the lattice beam (9) and used for draining fissure water in a dangerous rock mass;
and step 5, finally, backfilling (10) is arranged in the lattice beam (9) to cover a certain thickness for planting grass and greening to achieve the effect of beautifying the environment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011549886.7A CN112681347A (en) | 2020-12-24 | 2020-12-24 | Combined supporting structure for treating dangerous rock mass and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011549886.7A CN112681347A (en) | 2020-12-24 | 2020-12-24 | Combined supporting structure for treating dangerous rock mass and construction method thereof |
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| CN112681347A true CN112681347A (en) | 2021-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431082A (en) * | 2021-05-27 | 2021-09-24 | 中电建铁路建设投资集团有限公司 | Fast-assembly retaining wall structure and construction method thereof |
| CN114232652A (en) * | 2021-12-09 | 2022-03-25 | 中国葛洲坝集团第一工程有限公司 | Protective structure for strongly weathered mudstone deep cutting slope and construction method |
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Cited By (3)
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| CN113431082A (en) * | 2021-05-27 | 2021-09-24 | 中电建铁路建设投资集团有限公司 | Fast-assembly retaining wall structure and construction method thereof |
| CN114232652A (en) * | 2021-12-09 | 2022-03-25 | 中国葛洲坝集团第一工程有限公司 | Protective structure for strongly weathered mudstone deep cutting slope and construction method |
| CN114232652B (en) * | 2021-12-09 | 2022-09-16 | 中国葛洲坝集团第一工程有限公司 | Protective structure for strongly weathered mudstone deep cutting slope and construction method |
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Application publication date: 20210420 |