CN114165033B - Construction method of single-support overhanging scaffold for ultra-high steep rock slope - Google Patents
Construction method of single-support overhanging scaffold for ultra-high steep rock slope Download PDFInfo
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- CN114165033B CN114165033B CN202111616399.2A CN202111616399A CN114165033B CN 114165033 B CN114165033 B CN 114165033B CN 202111616399 A CN202111616399 A CN 202111616399A CN 114165033 B CN114165033 B CN 114165033B
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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
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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
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/007—Devices and methods for erecting scaffolds, e.g. automatic scaffold erectors
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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Abstract
The invention relates to the technical field of construction of a scaffold for an ultrahigh steep rocky slope, and discloses a construction method of a single-support overhanging scaffold for the ultrahigh steep rocky slope, which comprises the following construction steps: 1) Drilling a horizontal hole and an oblique hole; 2) The inner end of the cantilever beam is embedded and fixed in the horizontal hole, a single inclined support rod which is arranged in an inclined mode is arranged below the cantilever beam, and the lower end of the inclined support rod is fixed in the inclined hole; 3) The method comprises the following steps of arranging a scaffold, wherein the scaffold comprises a plurality of vertical rods arranged longitudinally, a plurality of small transverse rods arranged horizontally and a plurality of large transverse rods arranged horizontally, and the inner ends of the small transverse rods are fixedly connected with the rock slopes through wall connecting pieces; 4) Arranging a diagonal steel wire rope which inclines upwards to pull the cantilever beam obliquely; 5) Paving a scaffold board between the small cross bar and the large cross bar; through arranging the cantilever beam on the rock slope, the scaffold is built on the cantilever beam, the whole scaffold is arranged on the ultrahigh steep rock slope in a cantilever state, the structure is simple, and the construction is convenient.
Description
Technical Field
The invention relates to the technical field of construction of a scaffold for an ultrahigh steep rock slope, in particular to a construction method of a single-support overhanging scaffold for the ultrahigh steep rock slope.
Background
The side slope is a slope formed naturally or artificially, is one of the most basic geographic environments in human process activities, and is also the most common process form in engineering construction.
The types of the side slopes are various, and in order to prevent the side slopes from overturning, sliding and the like, protection is generally required to be carried out on the side slopes so as to ensure safety; in general, a scaffold is erected on a side slope, and then a worker carries out protection construction on the scaffold.
In the prior art, for an ultrahigh steep rock slope, particularly an ultrahigh steep rock slope with the height of more than 50 meters, a scaffold cannot be erected on the ultrahigh steep rock slope, so that the defects that the protection construction on the ultrahigh steep rock slope is extremely difficult, even cannot be implemented and the like are caused.
Disclosure of Invention
The invention aims to provide a construction method of a single-support overhanging scaffold for an ultra-high steep rocky slope, and aims to solve the problem that the scaffold cannot be erected on the ultra-high steep rocky slope in the prior art.
The invention discloses a construction method of a single-support overhanging scaffold for an ultrahigh steep rock slope, which comprises the following construction steps:
1) Measuring and setting out the position to be drilled on the rocky slope, and drilling a horizontal hole and an inclined hole at the drilling position of the rocky slope;
2) The cantilever beam is horizontally arranged on the rock slope, the inner end of the cantilever beam is embedded and fixed in the horizontal hole, the outer end of the cantilever beam extends outwards away from the rock mass, the inner end of the cantilever beam is provided with a fixed sleeve, the inner end of the fixed sleeve is embedded and fixed in the horizontal hole, the outer end of the fixed sleeve is provided with a ring piece surrounding the periphery of the cantilever beam, and the ring piece is pressed on the rock slope from outside to inside; a single inclined support rod which is arranged in an inclined mode is arranged below the cantilever beam, the upper end of the inclined support rod is in butt joint with the bottom of the cantilever beam, and the lower end of the inclined support rod is embedded and fixed in the inclined hole from top to bottom;
3) The scaffold is arranged on the cantilever beam and comprises a plurality of vertical rods which are longitudinally arranged, a plurality of small cross rods which are horizontally arranged and a plurality of large cross rods which are horizontally arranged, the inner ends of the small cross rods are fixedly connected with the rock slopes through wall connecting pieces, and the outer ends of the small cross rods are arranged in a mode of deviating from the rock body in an extending mode; the bottoms of the upright rods are embedded in the cantilever beam, and the small cross rods and the large cross rods are respectively and fixedly connected with the upright rods;
4) Drilling an inclined pull hole on the rocky slope, arranging a cable-stayed steel wire rope on the cantilever beam, embedding and fixing the inner end of the cable-stayed steel wire rope in the inclined pull hole, connecting the outer end of the cable-stayed steel wire rope with the outer end of the cantilever beam, and inclining the cable-stayed cantilever beam upwards;
5) And a scaffold board is laid between the small cross bar and the large cross bar.
Further, in the construction step 2), the inner end of the cantilever beam and the inner end of the fixing sleeve are fixed in the horizontal direction by pouring slurry into the horizontal hole, and the lower end of the inclined support rod is fixed in the inclined hole by pouring slurry into the inclined hole.
Further, in the construction step 2), slurry is poured into the diagonal draw holes, and the inner ends of the diagonal draw steel wire ropes are fixed in the diagonal draw holes.
Further, in the construction step 2), after the lower end of the diagonal brace is embedded into the diagonal hole from top to bottom, a lower support piece is inserted into the diagonal hole, the lower support piece is located below the diagonal brace, the inner end of the lower support piece is embedded and fixed into the diagonal hole, and the outer end of the lower support piece is located outside the diagonal hole and abuts against the diagonal brace from bottom to top.
Further, the cantilever beam is provided with an opening which is arranged upwards, and in the construction step 3), the bottom of the upright rod is embedded into the opening from top to bottom.
Furthermore, the opening is small in top and large in bottom, a sleeve ring is arranged in the opening, a sleeve hole for embedding the bottom of the vertical rod is formed in the sleeve ring, a plurality of cracks with openings at the bottom are formed in the side wall of the sleeve ring, the plurality of cracks are arranged at intervals along the circumferential direction of the sleeve ring, the side wall of the sleeve ring is divided into a plurality of deformation pieces which are independently arranged by the plurality of cracks, the deformation pieces are arranged in an inwards inclined manner along the direction from top to bottom, and the plurality of deformation pieces surround to form the sleeve hole;
in the construction step 3), the bottom of the vertical rod is embedded into the opening of the cantilever beam, the bottom of the vertical rod is embedded into the sleeve hole of the sleeve ring from top to bottom, and the vertical rod extrudes the deformation sheets to elastically expand outwards.
Furthermore, the bottom of the deformation sheet extends outwards to form a bending sheet, the lower end of the bending sheet is in butt joint with the bottom of the deformation sheet, the upper end of the bending sheet extends upwards and is obliquely arranged deviating from the deformation sheet, and the upper end of the deformation sheet is connected with the inner side wall of the opening;
in the construction step 3), in the process that the upright stanchion extrudes the plurality of deformation pieces to elastically expand outwards, the bottom of the deformation pieces drives the lower ends of the bending pieces to deviate from the trepanning to elastically expand.
Further, the cantilever beam comprises a plurality of parallel channel steels arranged at intervals and a plurality of section steels, the channel steels are provided with openings, the openings extend along the length direction of the channel steels, moving blocks are arranged in the openings, and the lantern rings are arranged in the moving blocks;
in the construction step 2), the inner ends of the section steels are embedded and fixed in a rocky slope, the outer ends of the section steels extend outwards away from a rock body, and then the channel steels are arranged at intervals along the length direction of the section steels, cross the section steels and are respectively and fixedly connected with the section steels; in the construction step 4), the outer end of the inclined steel wire rope is connected with the outer end of the section steel.
Furthermore, the section steel is provided with outer through holes and inner through holes which are arranged at intervals, and the inner through holes and the outer through holes are sequentially arranged at intervals along the extending direction of the section steel from inside to outside;
in the construction step 4), the outer end of the cable-stayed steel wire rope firstly penetrates through the outer through hole from top to bottom and then penetrates through the inner through hole from bottom to top, the outer end of the cable-stayed steel wire rope is provided with a vacant section which extends out of the section steel after penetrating through the inner through hole, the outer end of the cable-stayed steel wire rope is provided with an adjusting section which is positioned between the inner through hole and the outer through hole, the adjusting section is positioned below the section steel, and an adjusting space is formed between the adjusting section and the section steel;
the outer end of the diagonal steel wire rope is connected with an inner anchoring head and an outer anchoring head, the inner anchoring head is connected to the profile steel from top to bottom and is arranged in alignment with the inner through hole, and the outer anchoring head is connected to the profile steel from bottom to top and is arranged in alignment with the outer through hole; a wedge-shaped block is arranged below the profile steel and inserted into the adjusting space, the bottom of the wedge-shaped block is flat and is connected to the bottom of the profile steel from bottom to top, the wedge-shaped block is provided with an inclined surface which is arranged downwards and is connected with the adjusting section, and the inclined surface is arranged towards the profile steel in an inclined manner along the direction in which the wedge-shaped block is inserted into the adjusting space; the inclined surface of the wedge-shaped block is provided with a plurality of limiting grooves, the limiting grooves are arranged across the width of the inclined surface, and the limiting grooves are arranged at intervals along the length direction of the inclined surface;
in the construction step 4), after the stayed-cable wire rope is tensioned to reach the set strength, the wedge-shaped block is continuously inserted into the adjusting space until the adjusting section is embedded into the limiting groove.
Further, along direction from bottom to top, the middle part of rock matter side slope has the changeover portion that deviates from scaffold frame slope outwards, in construction step 3) be connected with the strengthening rod of longitudinal arrangement on the changeover portion, the lower extreme embedding of strengthening rod is fixed in the changeover portion, the upper end of strengthening rod extends upward and arranges, strengthening rod and a plurality of little horizontal pole fixed connection.
Compared with the prior art, the construction method of the single-support cantilever scaffold for the ultra-high steep rock slope, provided by the invention, has the advantages that the cantilever beam is arranged on the rock slope, the scaffold is directly built on the cantilever beam, the horizontal support of the cantilever beam is reinforced through the fixing sleeve and the diagonal steel wire rope, the bottom of the vertical rod of the scaffold is embedded into the cantilever beam, the inner end of the small cross rod is fixedly connected with the rock slope, so that the scaffold and the cantilever beam are stably connected, and the whole scaffold is arranged on the ultra-high steep rock slope in a cantilever state, so that the construction method is simple in structure and convenient to construct.
Drawings
FIG. 1 is a schematic flow diagram of a construction method of a single-support cantilever scaffold for an ultra-high steep rocky slope provided by the invention;
FIG. 2 is a schematic front view of the construction method of the single-support overhanging scaffold for the ultra-high steep rocky slope provided by the invention;
FIG. 3 is an enlarged partial schematic view of FIG. 2;
FIG. 4 is a schematic top view of a cantilever beam provided by the present invention;
FIG. 5 is a schematic front view of the present invention providing a traveling block in engagement with a collar;
FIG. 6 is a partial schematic view of the cable-stayed cable according to the present invention in cooperation with the section steel;
FIG. 7 is a schematic cross-sectional view of a wedge provided by the present invention;
fig. 8 is a cross-sectional schematic view of the cantilever beam provided by the invention matched with a diagonal brace.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of implementations of the invention refers to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operate, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and it is possible for one of ordinary skill in the art to understand the specific meaning of the above terms according to the specific situation.
Referring to fig. 1-8, preferred embodiments of the present invention are shown.
The construction method of the single-support overhanging scaffold for the ultra-high steep rocky side slope comprises the following construction methods:
step 1), measuring and setting out a position to be drilled on the rock slope 500, and drilling a horizontal hole 701 and an inclined hole 601 at the drilling position of the rock slope 500;
step 2), arranging a horizontally-arranged cantilever beam 201 on the rock slope 500, embedding and fixing the inner end of the cantilever beam 201 in a horizontal hole 701, extending the outer end of the cantilever beam 201 outwards away from the rock mass, arranging a fixing sleeve 703 at the inner end of the cantilever beam 201, embedding and fixing the inner end of the fixing sleeve 703 in the horizontal hole 701, arranging a ring piece 702 surrounding the periphery of the cantilever beam 201 at the outer end of the fixing sleeve 703, and pressing the ring piece 702 on the rock slope 500 from outside to inside; the fixed sleeve 703 is fixedly arranged at the same time, so that the horizontal supporting capacity of the cantilever beam 201 can be enhanced;
a single inclined supporting rod 100 which is obliquely arranged is arranged below the cantilever beam 201, the upper end of the inclined supporting rod 100 is in butt joint with the bottom of the cantilever beam 201, and the lower end of the inclined supporting rod 100 is embedded and fixed in the inclined hole 601 from top to bottom;
step 3), arranging a scaffold on the cantilever beam 201, wherein the scaffold comprises a plurality of vertical rods 301 arranged longitudinally, a plurality of small cross rods 302 arranged horizontally and a plurality of large cross rods arranged horizontally, the inner ends of the small cross rods 302 are fixedly connected with the rock slope 500 through wall connecting pieces, and the outer ends of the small cross rods 302 are arranged in a manner of extending away from the rock body; the bottom of the upright stanchion 301 is embedded in the cantilever beam 201, and the small cross bar 302 and the large cross bar are respectively fixedly connected with the upright stanchions 301;
step 4), drilling an inclined pull hole on the rock slope 500, arranging a cable-stayed steel wire rope 400 on the cantilever beam 201, embedding and fixing the inner end of the cable-stayed steel wire rope in the inclined pull hole, connecting the outer end of the cable-stayed steel wire rope 400 with the outer end of the cantilever beam 201, and inclining the cable-stayed cantilever beam 201 upwards; the horizontal supporting capability of the cantilever beam 201 can be further enhanced by the upward inclined pulling force of the inclined steel wire rope 400;
step 5), paving a scaffold board between the small cross bar 302 and the large cross bar.
Above-mentioned superelevation cliff matter side slope single brace scaffold frame construction method of encorbelmenting that provides, through arrange cantilever beam 201 on rock matter side slope 500, directly build the scaffold frame on cantilever beam 201 again, play the reinforcing action to cantilever beam 201's horizontal brace through fixed cover 703 and cable-stay wire rope 400, the bottom embedding of the pole setting 301 of scaffold frame is in cantilever beam 201, the inner and rock matter side slope 500 fixed connection of little horizontal pole 302, it is firm to make to be connected between scaffold frame and the cantilever beam 201, whole scaffold frame is located the state of encorbelmenting and arranges on superelevation cliff matter side slope 500, moreover, the steam generator is simple in structure, and convenient for construction.
The quantity and the mode of arranging of pole setting 301 big horizontal pole and little horizontal pole 302, can be according to actual need and decide, however, every little horizontal pole 302 and big horizontal pole all need be connected with a plurality of pole settings 301 simultaneously, a plurality of pole settings 301 can be the multiunit form and arrange, multiunit pole setting 301 group is spaced apart respectively, every group pole setting 301 group includes a plurality of pole settings 301, a plurality of pole settings 301 of every group pole setting 301 group are arranged along the length direction interval of little horizontal pole 302, and like this, every little horizontal pole 302 then corresponds and is connected with a plurality of pole settings 301 of every group pole setting 301 group. A plurality of small ledgers 302 are arranged at intervals along the height direction of the vertical ledger 301, so that the vertical ledger 301 and the small ledger 302 are combined to form a scaffold on which workers can directly perform construction and the like.
In the construction step 2), slurry is poured into the horizontal hole 701, after the strength of the slurry reaches a set requirement, the inner end of the cantilever beam 201 and the inner end of the fixing sleeve 703 are fixed in the horizontal direction, and the lower end of the diagonal brace 100 is fixed in the diagonal hole 601 by pouring the slurry into the diagonal hole 601.
And after the strength of the slurry meets the set requirement, fixing the inner end of the cable-stayed steel wire rope 400 in the cable-stayed hole.
In the construction step 2), after the lower end of the diagonal brace 100 is embedded into the diagonal hole 601 from top to bottom, the lower supporting piece 602 is inserted into the diagonal hole 601, the lower supporting piece 602 is located below the diagonal brace 100, the inner end of the lower supporting piece 602 is embedded and fixed in the diagonal hole 601, the outer end of the lower supporting piece 602 is located outside the diagonal hole 601, and the diagonal brace 100 is pressed from bottom to top.
Because the inclined strut 100 is arranged in an inclined state, and the inclined strut 100 supports the cantilever beam 201 from bottom to top, the lower supporting piece 602 is arranged below the inclined strut 100, and the lower supporting piece 602 can support the inclined strut 100 from bottom to top, so that the inclined strut 100 is reinforced, and the supporting capability of the inclined strut 100 is enhanced.
The cantilever beam 201 is provided with an opening 203 arranged upwards, and in the construction step 3), the bottom of the upright rod 301 is embedded in the opening 203, so that the bottom of the upright rod 301 can be in positioning fit with the opening 203, and the fit is more stable.
The opening 203 is big end down, is equipped with the lantern ring 206 in the opening 203, is equipped with the trepanning 205 that supplies the bottom embedding of pole 301 in the lantern ring 206, is equipped with the crack of a plurality of bottom openings 203 in the lateral wall of lantern ring 206, and a plurality of cracks are arranged along the circumference interval of lantern ring 206, and a plurality of cracks divide into a plurality of deformation pieces of independently arranging with the lateral wall of lantern ring 206, along top-down's direction, and the deformation piece is inwards inclined to be arranged, and a plurality of deformation pieces enclose and close and form trepanning 205.
In the construction step 3), the bottom of the upright rod 301 is embedded into the opening 203 of the cantilever beam 201, the bottom of the upright rod 301 is embedded into the sleeve hole 205 of the sleeve ring 206 from top to bottom, and the upright rod 301 extrudes the plurality of deformation pieces to elastically expand outwards. After the bottom of the vertical rod 301 is embedded in the trepan boring 205 of the collar 206, because the plurality of deformation pieces are arranged in an inward inclined manner, the deformation pieces can be extruded to deform outwards under the extrusion of the bottom of the vertical rod 301, meanwhile, the plurality of deformation pieces clamp the bottom of the vertical rod 301 in an annular manner, and can play a role in clamping and fixing the bottom of the vertical rod 301, secondly, after the bottom of the vertical rod 301 is just embedded in the trepan boring 205, the bottom of the vertical rod 301 is positioned in the middle of the trepan boring 205, along with the increase of the bearing of the scaffold and the like, the bottom of the vertical rod 301 can be outwards expanded by extruding the deformation pieces downwards, so as to play a role in buffering and shock absorption, of course, along with the increase of the embedding depth of the bottom of the vertical rod 301, the clamping force of the deformation pieces for clamping the bottom of the vertical rod 301 is larger.
The bottom of the deformation piece extends outwards to form a bending piece 207, the lower end of the bending piece 207 is butted with the bottom of the deformation piece, the upper end of the bending piece 207 extends upwards and is obliquely arranged away from the deformation piece, and the upper end of the deformation piece is connected with the inner side wall of the opening 203.
In the construction step 3), in the process that the upright stanchion 301 extrudes the plurality of deformation pieces to elastically expand outwards, the bottom of the deformation pieces drives the lower ends of the bending pieces 207 to deviate from the trepanning 205 to elastically expand. Thus, the bent piece 207 is connected in the opening 203 by the inner side wall of the opening 203, which is deformed, and the deformation force of the bent piece 207 can maintain the position of the collar 206 in the opening 203 to be stable.
When the bottom extrusion deformation piece of pole setting 301 expands outwards, drive crooked piece 207 outward expansion simultaneously, because the inside wall of opening 203 is being connected to crooked piece 207's upper end, like this, crooked piece 207 then aggravation is out of shape, produces the deformation force towards lantern ring 206 middle part, can assist the deformation piece to centre gripping the bottom of pole setting 301 in step, also can be better location lantern ring 206 the position in opening 203.
In the construction step 2), the inner ends of the profile steels are embedded and fixed in the rocky slope 500, the outer ends of the profile steels extend outwards away from the rock mass, then the channel steels are arranged at intervals along the length direction of the profile steels, and the channel steels stretch across the profile steels and are respectively fixedly connected with the profile steels; in the construction step 4), the outer end of the diagonal steel wire rope 400 is connected with the outer end of the section steel.
In the actual construction process, the moving block 204 can be moved to a required position along the opening 203 according to the position requirement, and then fixed, and the bottom of the vertical rod 301 is directly embedded into the collar 206 in the opening 203.
Or, a fixing hole is formed in the moving block 204, and a bolt or the like penetrates through the fixing hole and the side wall of the channel steel 202, so that the moving block 204 and the channel steel 202 are relatively fixed, and the position of the moving block 204 in the channel steel 202 can be determined according to actual needs.
The structural steel is provided with two through holes arranged at intervals, the two through holes are arranged at intervals along the length direction of the structural steel, the two through holes comprise outer through holes and inner through holes, the inner through holes and the outer through holes are arranged at intervals according to the sequence along the extending direction of the structural steel from inside to outside, and the inner through holes and the outer through holes respectively penetrate through the structural steel from top to bottom.
In the construction step 4), the outer end of the diagonal steel wire rope 400 firstly passes through the outer through hole from top to bottom and then passes through the inner through hole from bottom to top, the outer end of the diagonal steel wire rope 400 is connected with two anchoring heads, namely an inner anchoring head 410 connected to the profile steel from top to bottom and an outer anchoring head 411 connected to the profile steel from bottom to top, the inner anchoring head 410 is arranged in alignment with the inner through hole, and the outer anchoring head 411 is arranged in alignment with the outer through hole.
Like this, draw wire rope 400 to one side forms the multiposition with shaped steel and is connected through passing interior through-hole and outer perforating hole respectively, and through setting up interior anchor head 410 and outer anchor head 411, forms multiposition fixed to the lower extreme of shaped steel, guarantees to draw wire rope 400 to one side's outer end fixed firm, keeps drawing the effect to shaped steel, reduces to draw wire rope 400 to one side and lead to lax phenomenon because of the stretch-draw aversion.
The cable-stayed steel wire rope 400 is provided with a tensioning section formed between the section steel and the rock body, a stress sheet is arranged on the tensioning section, the outer end of the cable-stayed steel wire rope 400 is provided with an idle section 407 which penetrates through the inner through hole and then extends to the section steel, and the idle section 407 is connected with the anchor cable tensioner.
When the cable-stayed steel wire rope 400 has insufficient tensioning, that is, when the cable-stayed steel wire rope is loosened, the inner anchoring head 410 and the outer anchoring head 411 can be loosened according to the monitoring of the stress sheet, at the moment, the controller can control the anchor cable to be tensioned to stretch the cable-stayed steel wire rope 400 again, so that the cable-stayed steel wire rope 400 reaches the tensioning requirement again, and the inner anchoring head 410, the outer anchoring head 411 and the cable-stayed steel wire rope 400 are anchored again.
The outer end of the cable-stayed steel wire rope 400 is provided with an adjusting section 408 positioned between the inner through hole and the outer through hole, the adjusting section 408 is positioned below the section steel, an adjusting space 409 is arranged between the adjusting section 408 and the section steel, and a wedge block 412 is inserted in the adjusting space 409. The bottom of the wedge block 412 is flat, the bottom of the wedge block 412 is connected to the section steel from bottom to top, the wedge block 412 is provided with an inclined surface which is arranged downwards and connected with the adjusting section 408, and the inclined surface is arranged towards the section steel in an inclined mode along the direction that the wedge block 412 is inserted into the adjusting space 409. Wedge block 412 has a power element attached to it that urges wedge block 412 towards the insertion movement of adjustment space 409.
Thus, when the cable-stayed steel wire rope 400 is loosened in tensioning, the power element pushes the wedge block 412 to be inserted into the adjusting space 409, the outer end of the cable-stayed steel wire rope 400 is connected to the inclined plane and pulled downwards under the action of the inclined plane, the external section cannot be changed under the limitation of the inner anchoring head 410, the outer anchoring head 411 is arranged at the bottom of the profile steel, the tensioning of the cable-stayed steel wire rope 400 cannot be limited, and the sample binding can be realized, so that the tensioning section between the profile steel and the rock can be tensioned, the tensioning requirement is met again, and in this way, the tensioning operation of the cable-stayed steel wire rope 400 can be realized again on the basis that the original arrangement of the cable-stayed steel wire rope 400 is not damaged.
In this embodiment, the inclined surface of the wedge block 412 is provided with a plurality of limiting grooves 413 for the adjustment section 408 to be embedded in, the limiting grooves 413 are arranged across the width of the inclined surface, and the limiting grooves 413 are sequentially arranged at intervals along the length direction of the inclined surface, in the construction step 4), when the cable-stayed cable 400 is tensioned to reach a set strength, the wedge block 412 is continuously inserted into the adjustment space 409 until the adjustment section 408 is embedded in the limiting groove 413.
Thus, after the adjusting section 408 of the cable-stayed cable 400 is connected to the inclined surface, the adjusting section 408 of the cable-stayed cable 400 can be sunk into the limiting groove 413, so that the cable-stayed cable 400 is stably connected with the inclined surface.
Along the direction from bottom to top, the middle part of superelevation steep rocky slope 500 has the changeover portion that deviates from scaffold frame slope outwards, and in construction step 3), be connected with the anchor strut 501 of longitudinal arrangement on the changeover portion, the lower extreme embedding of anchor strut 501 is in the changeover portion, and the upper end of anchor strut 501 extends upwards to be arranged, anchor strut 501 and a plurality of little horizontal pole 302 fixed connection.
Like this, when the inclination of super high steep rock matter slope 500 appears changing, and deviates from the scaffold slope and changes, utilize anchor strut 501 to increase multiposition fixed, avoid because the slope of changeover portion, lead to the length increase of little horizontal pole 302, and then make the phenomenon that little horizontal pole 302 topples easily.
As the actual construction case, 12# section steel can be selected as the section steel, and 8# channel steel can be selected as the channel steel. The ultra-high vertical rock slope 500 described above, which is not necessarily perfectly vertical theoretically, may have a certain inclination angle and may be formed to be partially convex or concave.
The single-support overhanging scaffold has the erection height of 30 meters and the overhanging width of 3.65 meters.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. The construction method of the single-support overhanging scaffold for the ultra-high steep rocky side slope is characterized by comprising the following construction steps of:
1) Measuring and setting out the position to be drilled on the rocky slope, and drilling a horizontal hole and an inclined hole at the drilling position of the rocky slope;
2) The cantilever beam is horizontally arranged on the rock slope, the inner end of the cantilever beam is embedded and fixed in the horizontal hole, the outer end of the cantilever beam extends outwards away from the rock mass, a fixing sleeve is arranged at the inner end of the cantilever beam, the inner end of the fixing sleeve is embedded and fixed in the horizontal hole, the outer end of the fixing sleeve is provided with a ring piece surrounding the periphery of the cantilever beam, the ring piece is pressed against the rock slope from outside to inside, and the fixing sleeve is fixedly arranged; a single inclined support rod which is obliquely arranged is arranged below the cantilever beam, the upper end of the inclined support rod is butted at the bottom of the cantilever beam, and the lower end of the inclined support rod is embedded and fixed in the inclined hole from top to bottom;
3) The scaffold is arranged on the cantilever beam and comprises a plurality of vertical rods which are longitudinally arranged, a plurality of small cross rods which are horizontally arranged and a plurality of large cross rods which are horizontally arranged, the inner ends of the small cross rods are fixedly connected with the rock slopes through wall connecting pieces, and the outer ends of the small cross rods are arranged in a mode of deviating from the rock body in an extending mode; the bottoms of the upright posts are embedded in the cantilever beam, and the small cross bar and the large cross bar are respectively and fixedly connected with the upright posts;
4) Drilling an inclined pull hole on the rocky slope, arranging a cable-stayed steel wire rope on the cantilever beam, embedding and fixing the inner end of the cable-stayed steel wire rope in the inclined pull hole, connecting the outer end of the cable-stayed steel wire rope with the outer end of the cantilever beam, and inclining the cable-stayed cantilever beam upwards;
5) Paving a scaffold board between the small cross bar and the large cross bar;
in the construction step 2), the inner end of the cantilever beam and the inner end of the fixed sleeve are fixed in the horizontal direction by grouting slurry into the horizontal hole, and the lower end of the inclined strut is fixed in the inclined hole by grouting slurry into the inclined hole;
in the construction step 2), slurry is poured into the diagonal draw holes, and the inner ends of the diagonal draw steel wires are fixed in the diagonal draw holes;
in the construction step 2), after the lower end of the diagonal brace is embedded into the diagonal hole from top to bottom, a lower support piece is inserted into the diagonal hole and positioned below the diagonal brace, the inner end of the lower support piece is embedded and fixed into the diagonal hole, and the outer end of the lower support piece is arranged outside the diagonal hole and presses against the diagonal brace from bottom to top.
2. The construction method of the single-support overhanging scaffold for an ultra-high steep rock slope as claimed in claim 1, wherein the overhanging beam has an opening arranged upward, and in the construction step 3), the bottom of the vertical rod is embedded in the opening from top to bottom.
3. The method for constructing the single-support overhanging scaffold on the ultra-high-cliff side slope according to claim 2, wherein the opening is small at the top and big at the bottom, a sleeve ring is arranged in the opening, a sleeve hole for embedding the bottom of the vertical rod is arranged in the sleeve ring, a plurality of cracks with openings at the bottom are arranged in the side wall of the sleeve ring, the plurality of cracks are arranged at intervals along the circumferential direction of the sleeve ring, the plurality of cracks divide the side wall of the sleeve ring into a plurality of deformation pieces which are independently arranged, the deformation pieces are arranged obliquely inwards along the top-bottom direction, and the plurality of deformation pieces surround to form the sleeve hole;
in the construction step 3), the bottom of the vertical rod is embedded into the opening of the cantilever beam, the bottom of the vertical rod is embedded into the sleeve hole of the sleeve ring from top to bottom, and the vertical rod extrudes the deformation sheets to elastically expand outwards.
4. The method for constructing a single-support cantilever scaffold on an ultra-high steep rock slope as claimed in claim 3, wherein the bottom of the deformation plate extends outwards to form a bending plate, the lower end of the bending plate is butted against the bottom of the deformation plate, the upper end of the bending plate extends upwards and is arranged obliquely deviating from the deformation plate, and the upper end of the deformation plate is connected with the inner side wall of the opening;
in the construction step 3), in the process that the upright stanchion extrudes the plurality of deformation pieces to elastically expand outwards, the bottom of the deformation pieces drives the lower ends of the bending pieces to deviate from the trepanning to elastically expand.
5. The method for constructing the ultra-high-gradient rocky slope single-support cantilever scaffold, according to claim 4, wherein the cantilever beam comprises a plurality of parallel steel channels arranged at intervals and a plurality of steel sections, the steel channels are provided with the openings, the openings extend along the length direction of the steel channels, the openings are provided with moving blocks, and the lantern rings are arranged in the moving blocks;
in the construction step 2), the inner ends of the section steels are embedded and fixed in a rocky slope, the outer ends of the section steels extend outwards away from a rock body, and then the channel steels are arranged at intervals along the length direction of the section steels, cross the section steels and are respectively and fixedly connected with the section steels; in the construction step 4), the outer end of the inclined steel wire rope is connected with the outer end of the section steel.
6. The method for constructing a single-support overhanging scaffold on an ultra-high-cliff side slope according to claim 5, wherein the section steel is provided with outer through holes and inner through holes which are arranged at intervals, and the inner through holes and the outer through holes are sequentially arranged at intervals along the extending direction of the section steel from inside to outside;
in the construction step 4), the outer end of the cable-stayed steel wire rope firstly penetrates through the outer through hole from top to bottom and then penetrates through the inner through hole from bottom to top, the outer end of the cable-stayed steel wire rope is provided with a vacant section which penetrates through the inner through hole and then extends out of the section steel, the outer end of the cable-stayed steel wire rope is provided with an adjusting section which is positioned between the inner through hole and the outer through hole, the adjusting section is positioned below the section steel, and an adjusting space is formed between the adjusting section and the section steel;
the outer end of the diagonal steel wire rope is connected with an inner anchoring head and an outer anchoring head, the inner anchoring head is connected to the profile steel from top to bottom and is arranged in alignment with the inner through hole, and the outer anchoring head is connected to the profile steel from bottom to top and is arranged in alignment with the outer through hole; a wedge-shaped block is arranged below the profile steel and is inserted into the adjusting space, the bottom of the wedge-shaped block is flat and is connected to the bottom of the profile steel from bottom to top, the wedge-shaped block is provided with an inclined surface which is arranged downwards and is connected with the adjusting section, and the inclined surface is arranged towards the profile steel in an inclined manner along the direction in which the wedge-shaped block is inserted into the adjusting space; the inclined surface of the wedge-shaped block is provided with a plurality of limiting grooves, the limiting grooves are arranged across the width of the inclined surface, and the limiting grooves are arranged at intervals along the length direction of the inclined surface;
in the construction step 4), after the stayed-cable wire rope is tensioned to reach the set strength, the wedge-shaped block is continuously inserted into the adjusting space until the adjusting section is embedded into the limiting groove.
7. The method for constructing a single-support overhanging scaffold on an ultra-high-gradient rocky slope according to claim 1, wherein the middle part of the rocky slope has a transition section inclined outward away from the scaffold in the bottom-up direction, and in the step 3), a reinforcing rod is connected to the transition section in a longitudinal direction, the lower end of the reinforcing rod is embedded and fixed in the transition section, the upper end of the reinforcing rod extends upward, and the reinforcing rod is fixedly connected to the small cross rods.
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| CN207553091U (en) * | 2017-10-14 | 2018-06-29 | 黄志强 | A kind of permanent anchor cable for side slope |
| CN108104460A (en) * | 2017-11-14 | 2018-06-01 | 中国电建集团华东勘测设计研究院有限公司 | A kind of overhanging type framed bent sets up structure and construction method |
| CN208604902U (en) * | 2018-07-24 | 2019-03-15 | 武汉建工集团股份有限公司 | One kind can turnover tool formula builder's jack |
| CN210164206U (en) * | 2019-06-12 | 2020-03-20 | 中国有色金属长沙勘察设计研究院有限公司 | High steep rock slope scaffold puts up conversion equipment |
| CN111173249B (en) * | 2020-01-10 | 2022-02-22 | 上海二十冶建设有限公司 | Overhanging support system attached to rectangular beam and column |
| CN113530192B (en) * | 2021-08-16 | 2023-03-31 | 中国铁道科学研究院集团有限公司 | Multi-support overhanging scaffold structure of ultrahigh vertical rock slope |
| CN113668832B (en) * | 2021-08-16 | 2022-10-11 | 中国铁道科学研究院集团有限公司 | Single-support overhanging scaffold structure of ultrahigh vertical rock slope |
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