CN110004950A - Construction method of bidirectional automatic adjustment type prestressed anchor cable - Google Patents
Construction method of bidirectional automatic adjustment type prestressed anchor cable Download PDFInfo
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- CN110004950A CN110004950A CN201910389025.8A CN201910389025A CN110004950A CN 110004950 A CN110004950 A CN 110004950A CN 201910389025 A CN201910389025 A CN 201910389025A CN 110004950 A CN110004950 A CN 110004950A
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 230000002457 bidirectional effect Effects 0.000 title abstract 5
- 238000013461 design Methods 0.000 claims abstract description 28
- 238000004873 anchoring Methods 0.000 claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 238000007789 sealing Methods 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 238000003754 machining Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a construction method of a bidirectional automatic adjustment type prestressed anchor cable, which is characterized by comprising the following steps of: s1, setting up a bent; s2, drilling; s3, machining the members of the anchor cable, and assembling the members of the anchor cable after machining; s4, installing an extrusion anchor; s5, assembling each component of the bidirectional automatic adjustment type prestressed anchor cable and other components of the anchor cable; s6, putting the bidirectional automatic adjustment type prestressed anchor cable into the drill hole; s7, grouting; s8, after the slurry strength meets the design requirement, carrying out tensioning locking on the anchor cable according to the design anchoring force; s9, if the landslide is deformed, the bidirectional automatic adjustment type prestressed anchor cable automatically adjusts and adapts to keep a constant anchoring force. The method can always keep a relatively constant anchoring force, can ensure the effectiveness and safety of the treatment engineering in the deformation process of the landslide, and finally ensures that the treated landslide is in a stable state.
Description
Technical field
The present invention relates to landslide control engineering field, especially a kind of two-way automatic adjustable for being suitable for Landslide Deformation is pre-
The construction method of stress anchor cable.
Background technique
Prestress anchorage cable is a kind of rod piece for being primarily subjected to pulling force, it is the rock stratum by steel strand anchoring in deep stability
In, and it is being reinforced rock mass surface stretch-draw prestressing force, to transfer and improve Rock And Soil self-strength and self-stable ability.Anchor skill
Art is long-standing, is even more in recent years to advance by leaps and bounds for the development for the anchorage technology that comes down, the type and anchor mechanism of anchor cable are also in
Reveal diversity.Many engineerings solve many problems by optimizing to anchorage cable materials and own device.Numerous
In anchor cable, can effectively consume energy, reduce slope displacement, reduce anchor cable itself axle power, coordinate anchor cable group utmostly cooperate with
" surrender class " anchor cable for extending the anchor cable service life gradually has been favored by people.Anchor cable when " surrender class " anchor cable can solve moderate finite deformation
Bearing safety and landslide form mechanism, but failure of cable caused by prestressd anchor cable loses when not can solve slip mass creep is asked
It inscribes, in anchor cable lifetime, the compensation tension process of prestressd anchor cable loss is complicated, and there is also the longer problems of construction period.
Therefore, the two-way automatic adjustment of prestress anchorage cable is that a technology urgently to be resolved is asked when how to solve Landslide Deformation
Topic.
Summary of the invention
The purpose of the present invention is to the deficiency of existing prestress anchorage cable technology, a kind of Landslide Deformation that is suitable for is provided
Two-way automatic adjustable prestress anchorage cable.When Landslide Deformation increases, Landslide Deformation is adapted to using the yield characteristic of anchor cable, is protected
Demonstrate,proving anchor cable has more constant anchor force；When the reasons such as Landslide Deformation or anchor cable creep cause anchorage cable anchoring power to reduce, utilize
Force retaining device is answered on anchor cable, prestressd anchor cable is adjusted inside anchor cable, guarantees that anchor cable has more constant anchor force.It is double
It is able to maintain more constant anchor force always to automatic adjustable prestress anchorage cable, can guarantee harnessing project during Landslide Deformation
Effectively and safely, final to guarantee that the landslide after administering is in stable state.
To achieve the above object, technical scheme is as follows:
Two-way automatic adjustable prestressed anchor Cable Structure by surrender device, answer force retaining device, load and limiting device, hold
Power plate, extruding anchor, sealing plate, protection shell composition.
The effect of surrender device is to guarantee that anchor cable length can increase as Landslide Deformation increases, and keep the perseverance of anchor force
It is fixed.
The effect for answering force retaining device is to guarantee that landslide or anchor cable creep cause anchor force to be adjusted when reducing to anchor force
It is whole, and keep the constant of anchor force.
Load and limiting device are mainly used for surrender device, force retaining device, force bearing plate are answered to be limited, and most
It is carried under big anchor force state.
Extruding anchor guarantees the bearing capacity that steel strand wires can bring into normal play, and surrenders the extruding anchor of device end as safety anchor, protects
Demonstrate,prove the effective of anchor cable.
Sealing plate, protection shell guarantee regulating device for the device of two-way automatic adjustment and mortar to be isolated
It can be moved freely in protective shell body.
Load and limiting device, force bearing plate, sealing plate, protection shell drill by the indexing of steel strand wires, guarantee that steel twists
Line can pass through, and be sealed.
It is intended to carry out strength matching checking computations (being checked according to " mechanical design handbook " rule) between each primary structure member.
Specifically, construction procedure of the invention is the use step of the two-way automatic adjustable prestress anchorage cable:
S1, framed bent is set up, establishes interim safety precautions of constructing；
S2, drilling machine are in place, bore anchor cable hole using Pneumatic down-the-hole drill, are bored according to the aperture and hole depth of design requirement
Hole；
S3, according to design specification, to the surrender device of anchor cable, answer the components such as force retaining device, load and limiting device into
Row machining, after processing is completed, assembles the surrender device of anchor cable, answers the components such as force retaining device, load and limiting device；
S4, installation extruding anchor is squeezed on steel strand wires using steel strand wires extruder；
S5, the design according to anchor cable, by other components of each component of two-way automatic adjustable prestress anchorage cable and anchor cable
(centering bracket, Grouting Pipe etc.) is assembled, and two-way automatic adjustable prestress anchorage cable is worked out；
S6, will the two-way automatic adjustable prestress anchorage cable tripping in that woven drilling in；
S7, slip casting is carried out, pays attention to carrying out aperture protection, aperture is sealed protection shell using polybag etc., prevents
Slurries enter in the components such as protection shell；
After S8, slurry intensity reach design requirement, the tensioning fixation of anchor cable is carried out according to design anchor force；
S1, S2, S5, S6, S7, S8 described in this construction procedure are referring to " landslide control engineering technique of design and construction rule
Model (DZ/T 0219-2006) " in the 8th chapter prestress anchorage cable require operated.
If there is deformation, two-way automatic adjustable prestress anchorage cable is adjusted and adapts to automatically for S9, landslide, keeps more permanent
Fixed anchor force.
Other components of step S5 stream line of the present invention include centering bracket and Grouting Pipe etc..
Two-way automatic adjustable prestress anchorage cable involved in the method for the present invention has anchor cable main body, the anchor cable main body
It is placed in the drilling constructed on landslide, the anchor cable main body is at least made of anchoring section, free segment, revealed section, the anchor cable
Main body has two-way self-checking device and is placed under aperture in free segment limit, and the two-way self-checking device is by surrendering
Device answers force retaining device, load and limiting device, force bearing plate, extruding anchor, sealing plate, protection shell composition；The load and
Limiting device is nested in protective shell body, and can prolong the axial-movement of protection shell；The load and limiting device are hollow
Shape and one end have opening other end closing, and the force bearing plate is located at be open side and force bearing plate outer rim and load and limiting device
Hollow wall be adapted, and the axial-movement of load and limiting device can be prolonged；It is described answer force retaining device be nested in load and
Described that force retaining device one end is answered to be fixedly connected with load and limiting device closed end in limiting device, the stress keeps dress
It sets the other end to be fixedly connected with force bearing plate, the sealing plate is fixedly connected with the opening of load and limiting device and seals opening
It closes；At least three steel strand wires sequentially pass through the envelope of described protection shell one end, load and limiting device since revealed section respectively
Closed end and surrender device are simultaneously fixedly connected with extruding anchor, and at least three steel strand wires sequentially pass through the shield since anchoring section respectively
The shell other end, sealing plate, load and limiting device opening and force bearing plate and be fixedly connected with extruding anchor；In load and limit
It is described that there is gap positioned at the steel strand wires of revealed section side and between the steel strand wires of anchoring section side in device.
The design anchor force of two-way automatic adjustable prestress anchorage cable involved in the method for the present invention is 300kN, surrender
The yield force of device is 400kN.
The steel strand wires positioned at revealed section side of two-way automatic adjustable prestress anchorage cable involved in the method for the present invention
The position that protection shell is passed through with the steel strand wires for being located at anchoring section side is all made of sealing ring and is sealed.
The process description that two-way automatic adjustable prestress anchorage cable was adjusted and adapted to automatically Landslide Deformation is as follows:
Original state in two-way automatic adjustable prestress anchorage cable tripping in drilling is shown in Fig. 1.
During tensioning fixation, steel strand wires stress, by surrender device (not surrendering) drive load and limiting device,
Stress holding meanss aperture end is mobile to aperture direction, and stress retention device apertures bottom end is by hole bottom end extruding anchor, force bearing plate and steel
Twisted wire limitation, carries out stretching accumulation of energy, until anchorage cable stretching process is completed, sees Fig. 2.
When Landslide Deformation increases, when anchor cable stress increases and is more than the design anchor force of anchor cable, device is surrendered from movable property
Is slid between raw surrender and steel strand wires, with adapt to landslide moderate finite deformation (if not surrendering device, landslide generation compared with
When large deformation, steel strand wires, which can be broken, causes failure of cable), and guarantee that anchor cable has more constant anchor force, in surrender device
Safe extruding anchor is arranged in tail end, and in the state of guaranteeing that surrender device is surrendered in place completely, anchor cable will not fail, and see Fig. 3.
When the reasons such as slip mass compressive deformation or anchor cable creep cause anchorage cable anchoring power to reduce, the stress on anchor cable is kept
Device carries out destruction of edition type automatically, and prestressd anchor cable is adjusted inside anchor cable, guarantees that anchor cable has more constant anchor force, sees
Fig. 4.
Design method of the invention are as follows:
According to the 8th chapter prestress anchorage cable in " landslide control engineering technique of design and construction specification (DZ/T 0219-2006) "
It is required that being designed.
Compared with prior art, the beneficial effects of the present invention are:
(1) a kind of two-way automatic adjustable prestress anchorage cable for being suitable for Landslide Deformation is provided, during Landslide Deformation,
Two-way automatic adjustable prestress anchorage cable is able to maintain more constant anchor force always, can guarantee to administer work during Landslide Deformation
Journey is effectively and safely, final to guarantee that the landslide after administering is in stable state.
(2) present invention can be used in tension type or pressure anchor wire using without changing existing anchor cable structure pattern.
(3) the present invention also provides the two-way automatic adjustable construction prestressed cable methods for being suitable for Landslide Deformation, and
Traditional construction prestressed cable method is consistent, does not influence construction efficiency.
The contents of the present invention are further described with the following Examples, but the contents of the present invention are not limited only to implement
Content involved in example.
Detailed description of the invention
Fig. 1 is two-way automatic adjustable prestress anchorage cable original state structure chart as described in the examples
Fig. 2 is two-way automatic adjustable prestress anchorage cable tensioning fixation structure graph as described in the examples
Fig. 3 is structure chart when two-way automatic adjustable prestress anchorage cable Landslide Deformation as described in the examples increases
Structure chart when Fig. 4 is two-way automatic adjustable prestress anchorage cable slide creep as described in the examples.
Numeral mark in attached drawing is respectively:
1- protects shell；2- surrenders device；3- load and limiting device；4- force bearing plate；5- sealing plate；6- extruding anchor；7-
Answer force retaining device；8- Rock And Soil；9- drilling；10- mortar；11- steel strand wires；12- revealed section；13- free segment；14- anchoring section；
15- steel strand wires
Specific embodiment
As shown in figures 1-4, the design of two-way automatic adjustable prestress anchorage cable is the slope aspect that comes down according to certain in the present embodiment
70~90 °, 42 ° of the gradient, laterally wide 360m, longitudinal long 220m, relative relief about 50m, sliding surface buried depth 15m~20m, slope slope surface
It is that slide rock (Q is collapsed in the 4th system with slope foot area4 col+dl), 6~20m of thickness, mainly based on cohesive soil.Then:
A, landslide is reinforced using the prestress anchorage cable of 4 steel strand wires according to proper calculation according to Landslide Features；
B, anchorage cable design anchor force is 300kN.
C, surrender device design yield force is 400kN.
The construction method of two-way automatic adjustable prestress anchorage cable in the present embodiment, follows the steps below:
S1, framed bent is set up, establishes interim safety precautions of constructing；
S2, drilling machine are in place, bore anchor cable hole using Pneumatic down-the-hole drill, are bored according to the aperture and hole depth of design requirement
Hole；
S3, according to design specification, to the surrender device of anchor cable, answer the components such as force retaining device, load and limiting device into
Row machining, after processing is completed, assembles the surrender device of anchor cable, answers the components such as force retaining device, load and limiting device；
S4, installation extruding anchor is squeezed on steel strand wires using steel strand wires extruder；
S5, the design according to anchor cable, by other components of each component of two-way automatic adjustable prestress anchorage cable and anchor cable
(centering bracket, Grouting Pipe etc.) is assembled, and two-way automatic adjustable prestress anchorage cable is worked out；
S6, will the two-way automatic adjustable prestress anchorage cable tripping in that woven drilling in；
S7, slip casting is carried out, pays attention to carrying out aperture protection, aperture is sealed protection shell using polybag etc., prevents
Slurries enter in the components such as protection shell；
After S8, slurry intensity reach design requirement, the tensioning fixation of anchor cable is carried out according to design anchor force；
Step S1, S2, S5, S6, S7, S8 is referring to " landslide control engineering technique of design and construction specification in the present embodiment
(DZ/T 0219-2006) " in the 8th chapter prestress anchorage cable require operated.
If there is deformation, two-way automatic adjustable prestress anchorage cable is adjusted and adapts to automatically for S9, landslide, keeps more permanent
Fixed anchor force.
Two-way automatic adjustable prestress anchorage cable involved in this embodiment has anchor cable main body, the anchor cable main body
It is placed in the drilling constructed on landslide, the anchor cable main body is at least made of anchoring section 14, free segment 13, revealed section 12, institute
Anchor cable main body is stated with two-way self-checking device and is placed under aperture in 13 range of free segment, the two-way automatic adjustment dress
It sets by surrender device 2, answer force retaining device 7, load and limiting device 3, force bearing plate 4, extruding anchor 6, sealing plate 5, protection shell 1
Composition；The load and limiting device 3 are nested in protection shell 1, and can prolong the axial-movement of protection shell 1；The load
And limiting device 3 is hollow tube-shape and one end has opening other end closing, the force bearing plate 4 is located at opening side and force bearing plate
The hollow wall of 4 outer rims and load and limiting device 3 is adapted, and can prolong the axial-movement of load and limiting device 3；It is described to answer
Force retaining device 7 is nested in load and limiting device 3, described that 7 one end of force retaining device and load and limiting device 3 is answered to close
End is fixedly connected, described that 7 other end of force retaining device is answered to be fixedly connected with force bearing plate 4, and the sealing plate 5 is filled with load and limit
3 opening is set to be fixedly connected and by closure of openings；At least three steel strand wires sequentially pass through the guarantor since revealed section 12 respectively
1 one end of protective case body, the closed end of load and limiting device 3 and surrender device 2 are simultaneously fixedly connected, at least three steel with extruding anchor 6
Twisted wire sequentially passes through the opening of 1 other end of protective case body, sealing plate 5, load and limiting device 3 since anchoring section 14 respectively
It is fixedly connected with force bearing plate 4 and with extruding anchor 6；In load and limiting device 3, the steel strand wires 15 positioned at revealed section side
Be located at anchoring section side steel strand wires 11 between have gap.
The position that protection shell 1 described in the present embodiment has steel strand wires to pass through is all made of sealing ring and is sealed.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of construction method of two-way automatic adjustable prestress anchorage cable, it is characterized in that following the steps below:
S1, framed bent is set up, establishes interim safety precautions of constructing；
S2, drilling machine are in place, bore anchor cable hole using Pneumatic down-the-hole drill, drill according to the aperture and hole depth of design requirement；
S3, according to design specification, to the surrender device of anchor cable, the components such as force retaining device, load and limiting device is answered to carry out machine
Tool processing, after processing is completed, assembles the surrender device of anchor cable, answers the components such as force retaining device, load and limiting device；
S4, installation extruding anchor is squeezed on steel strand wires using steel strand wires extruder；
S5, the design according to anchor cable carry out other components of each component of two-way automatic adjustable prestress anchorage cable and anchor cable
Assembling, works out two-way automatic adjustable prestress anchorage cable；
S6, will the two-way automatic adjustable prestress anchorage cable tripping in that woven drilling in；
S7, slip casting is carried out, pays attention to carrying out aperture protection, aperture is sealed protection shell using polybag etc., prevents slurries
Into in the components such as protection shell；
After S8, slurry intensity reach design requirement, the tensioning fixation of anchor cable is carried out according to design anchor force；
If there is deformation, two-way automatic adjustable prestress anchorage cable is adjusted and adapts to automatically for S9, landslide, keeps more constant
Anchor force.
2. the construction method of two-way automatic adjustable prestress anchorage cable as described in claim 1, it is characterized in that anchor in step S5
Other components of rope include centering bracket and Grouting Pipe.
3. the construction method of two-way automatic adjustable prestress anchorage cable as claimed in claim 1 or 2, it is characterized in that described two-way
Automatic adjustable prestress anchorage cable has anchor cable main body, and the anchor cable main body is placed in the drilling constructed on landslide, the anchor
Rope main body is at least made of anchoring section, free segment, revealed section, and the anchor cable main body has two-way self-checking device and is placed in
Under aperture in free segment limit, the two-way self-checking device by surrender device, answer force retaining device, load and limit fill
It sets, force bearing plate, extruding anchor, sealing plate, protection shell composition；The load and limiting device are nested in protective shell body, and can
Prolong the axial-movement of protection shell；The load and limiting device are hollow tube-shape and one end has opening other end closing, institute
State that force bearing plate is located at opening side and the hollow wall of force bearing plate outer rim and load and limiting device is adapted, and can prolong load and
The axial-movement of limiting device；It is described that force retaining device is answered to be nested in load and limiting device, it is described to answer force retaining device one
End is fixedly connected with load and limiting device closed end, described that the force retaining device other end is answered to be fixedly connected with force bearing plate, described
Sealing plate is fixedly connected with the opening of load and limiting device and by closure of openings；At least three steel strand wires are opened from revealed section respectively
Begin to sequentially pass through the closed end of described protection shell one end, load and limiting device and surrender device and fix with extruding anchor to connect
It connects, at least three steel strand wires sequentially pass through the protective case body other end, sealing plate, load and limit dress since anchoring section respectively
The opening and force bearing plate set simultaneously are fixedly connected with extruding anchor；In load and limiting device, the steel positioned at revealed section side
Twisted wire and between the steel strand wires of anchoring section side have gap.
4. the construction method of two-way automatic adjustable prestress anchorage cable as claimed in claim 3, it is characterized in that it is described it is two-way from
The design anchor force of dynamic adjustable type prestress anchorage cable is 300kN, and the yield force for surrendering device is 400kN.
5. the construction method of two-way automatic adjustable prestress anchorage cable as claimed in claim 4, it is characterized in that described positioned at outer
It is close that the position that the steel strand wires for revealing section side pass through protection shell with the steel strand wires for being located at anchoring section side is all made of sealing ring progress
Envelope.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910389025.8A CN110004950A (en) | 2019-05-10 | 2019-05-10 | Construction method of bidirectional automatic adjustment type prestressed anchor cable |
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| CN201910389025.8A CN110004950A (en) | 2019-05-10 | 2019-05-10 | Construction method of bidirectional automatic adjustment type prestressed anchor cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753305A (en) * | 2022-04-02 | 2022-07-15 | 三峡大学 | Automatic slope loading reinforcing device and reinforcing method along with water level change |
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| CN106013140A (en) * | 2016-07-15 | 2016-10-12 | 中国地质科学院探矿工艺研究所 | Long spiral ring type bidirectional adjustable prestressed anchorage |
| CN208346815U (en) * | 2018-06-25 | 2019-01-08 | 栗正强 | A kind of anchor cable with shock resistance |
| CN109723480A (en) * | 2018-12-27 | 2019-05-07 | 山东科技大学 | Tension and compression coupling for country rock large deformation, which allows, presses energy-absorbing grouted anchor bar and working method |
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| CN114753305A (en) * | 2022-04-02 | 2022-07-15 | 三峡大学 | Automatic slope loading reinforcing device and reinforcing method along with water level change |
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Application publication date: 20190712 |