CN109208614A - Steel strand wires isolation mount and the construction method that the secondary pore-forming of anchor cable is carried out with the bracket - Google Patents
Steel strand wires isolation mount and the construction method that the secondary pore-forming of anchor cable is carried out with the bracket Download PDFInfo
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- CN109208614A CN109208614A CN201811353630.1A CN201811353630A CN109208614A CN 109208614 A CN109208614 A CN 109208614A CN 201811353630 A CN201811353630 A CN 201811353630A CN 109208614 A CN109208614 A CN 109208614A
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- 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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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Abstract
The construction method of the secondary pore-forming of anchor cable is carried out the invention discloses steel strand wires isolation mount and with the bracket, the isolation mount is rounded, and injected hole and one group of U-type groove are provided on isolation mount, and the notch of U-type groove is arranged outward.Injected hole has one and is centrally positioned on isolation mount；There are two U-type grooves and the bisection position of isolation mount is arranged in.Steel strand wires isolation mount provided by the invention and have the characteristics that strong operability, speed are fast, with strong points with the construction method that the bracket carries out the secondary pore-forming of anchor cable.Compared with eccentric down-the-hole drill casing follows up drilling construction, construction cost is substantially reduced.Speed improves 3-4 times compared with eccentric down-the-hole drill casing follows up drilling construction.Anchor cable steel strand wires are accurately positioned using steel strand wires steel strand wires isolation mount, anchor cable protective layer thickness, spacing are guaranteed, and the enhancing of steel strand wires durability, anchor cable construction quality is high, and deep pit monitor is high.
Description
Technical field
It is secondary that anchor cable is carried out the present invention relates to anchor cable drilling construction field, especially steel strand wires isolation mount and with the bracket
The construction method of pore-forming.
Background technique
With the development of society, more and more deep-foundation pit engineerings come into being, anchor cable is as about bundle branch in pattern foundation pit supporting structure
The main member of deformation is protected, construction quality and speed of application directly affect safety and the construction period of foundation pit.
Vast territory and abundant resources for China, complex geologic conditions, therefore anchor cable pore-forming complexity is also different, especially silty clay with
The cohesive strength of water content increased between soil particle reduces, and intensity, which is lower, to be easy to fall off, and in the silty clay of water content saturation
It is mingled with anchor cable construction after a large amount of rubble and phenomena such as design value is not achieved in anchor cable axle power after collapse hole or anchor cable pore-forming not only occurs, and
And because containing a large amount of rubble in silty clay, anchor cable rig can not normal pore-forming.
Piled anchor formula support form is support form common in deep foundation pit support, and the number of plies of the bigger anchor cable of foundation depth is more
More, the construction period that the speed of application and construction quality of anchor cable affect entire foundation pit supporting project is more related to the safety of foundation pit
Property, thus how to improve anchor cable speed of application and construction quality be anchor cable construction the most important thing.
The Northeast of China complex geologic conditions, therefore anchor cable pore-forming complexity is different, especially aqueous saturation type powder
Often there is necking down, collapse hole phenomenon after anchor cable pore-forming in matter clay and rubble geology, and anchor cable rig is because containing rubble or boulder in soil property
Often will appear anchor cable can not normal hole-forming phenomenon.General saturation type silty clay and rubble geology anchor cable construction are frequently with pipe
Mode carries out anchor cable construction, this mode existing technological deficiency of constructing is: first, construction cost is high, speed of application is slow, efficiency
It is low；Second, since anchor cable aperture is smaller, common anchor cable construction technology not can guarantee anchor after insertion steel strand wires and Grouting Pipe
The position precision of rope protective layer thickness and steel strand wires.
Summary of the invention
The construction method of the secondary pore-forming of anchor cable is carried out the object of the present invention is to provide steel strand wires isolation mount and with the bracket,
Solve that under aqueous saturation type silty clay and rubble geology pore-forming is difficult, precision is low, pore-forming cost is high, speed of application is slow
Technical problem.
To achieve the above object, the present invention adopts the following technical scheme: one aspect of the present invention provides steel strand wires isolation mount,
The isolation mount is rounded, and injected hole and one group of U-type groove are provided on isolation mount, and the notch of U-type groove is arranged outward.
Further, the diameter of isolation mount is 110mm-120mm；The diameter of injected hole is 28mm.
Further, the width of U-type groove is 16mm；The width of U-type groove is 0.8mm at least bigger than the diameter of steel strand wires.
Further, injected hole has one and is centrally positioned on isolation mount；There are two U-type grooves and setting is being isolated
The bisection position of bracket.
Further, injected hole has one and is centrally positioned on isolation mount；There are three U-type grooves and setting is being isolated
The trisection posistion of bracket.
Further, injected hole has one and is centrally positioned on isolation mount；There are four U-type grooves and setting is being isolated
The quartering position of bracket.
Further, injected hole there are two and be symmetricly set on isolation mount two sides；U-type groove there are four and along axis
Two sides are symmetrical；The center of circle of axis and injected hole is on same straight line.
Another aspect of the present invention provides the construction method that the secondary pore-forming of anchor cable is carried out with above-mentioned steel strand wires isolation mount, construction
Specific step is as follows for method:
Step 1, earth excavation；By original soil body according to anchorage cable design number of rows stage excavation among drawing, backacter is utilized
It is excavated at quasi- construction anchor cable hole location or less 600mm level height, rolls and smooth guarantee that down-the-hole drill is able to carry out construction operation；
Step 2, surveying setting-out；The control of anchor cable absolute altitude is carried out using level according to drawing anchorage cable design absolute altitude, determines that anchor pole bores
Behind the position of hole construction, cross hairs mark is drawn using red paint and determines anchor cable hole location；
Step 3, one-step pore-creating；Earth excavation completes anchor to, work surface width 6000mm 600mm lower than anchor cable elevation of borehole
After Suo Kongwei label, the anchor cable hole location cross hairs being drawn between support pile is directed at using down-the-hole drill adjustment proper angle, is hit
Bulk rubble and boulder in broken saturation silty clay carry out one-step pore-creating to anchor cable hole location；
Step 4 is laid with the soil body；Using backacter, by the travel route backfill 300mm high of down-the-hole drill one-step pore-creating,
6000mm wide, rolls smooth, meets secondary pore-forming anchor cable rig traveling and construction operation condition；
Step 5, secondary pore-forming；Using anchor cable rig, hole site is had become to down-the-hole drill and carries out secondary pore-forming, in anchor cable rig
In secondary pore forming process, filled the water in drilling into hole, mud is flowed out out of hole by the impact of water in hole, reaches hole flushing dredging
Effect；
Step 6, once grouting；Anchor cable rig drills to projected depth, mud be easily discharged out of the hole after, water is replaced with anchor rope grouting
Liquid, the interior injection anchor rope grouting liquid side Bian Xiangkong slowly screw out outside hole, slowly screw out the full weight for guaranteeing anchor rope grouting；Due to anchor cable
Injection slurry density is greater than the density of water and mud, and injection slurry displaces water in anchor cable hole and mud out of hole, because of anchor rope grouting
Liquid plays the role of retaining wall, prevents anchor cable hole from collapsing, and ensure that anchor cable drilling diameter and construction quality；
Step 7, the placement of steel strand finished；Integral steel strand wires, steel strand wires isolation mount, Grouting Pipe will be installed to send together
Enter in anchor cable hole, Grouting Pipe grout outlet is not more than 300mm apart from bottom hole；
Step 8, second pulp feeding；
S1 after the completion of steel strand finished placement, to injection slurry initial set, is starched using pipeline pneumatic mortar material；Pipeline pneumatic mortar material with from
The mass ratio of water is that the grouting material of 1000kg is equipped with the water of 330kg；80% water is added first in high-speed mixer, starts
Blender, low speed rotation are slowly added to whole grouting materials, after stirring 2 minutes, remaining 20% water of addition, and high speed rotation 3 minutes
It can be used；
The slip casting delivery pipe of grouting equipment is connect by S2 with the Grouting Pipe on the steel strand wires being installed, starting grouting equipment into
Row slip casting；After injection slurry is from anchor cable hole spilling, Grouting Pipe is gradually extracted out, guarantee completely to starch in anchor cable hole；
Step 9, waist rail, backing plate, anchorage installation and tensioning；The anchor cable steel strand wires that will be completed the process in advance after the completion of anchor rope grouting
It inserts in the hole, steel waist rail, backing plate, anchorage are installed after anchor cable intensity reaches design strength and carry out tensioning.
Further, step 7, steel strand finished include casing, steel strand wires, isolation mount, corrosion-resistant coating and butter, and steel twists
Line card connects in the U-type groove that isolation mount is arranged in, and the distance between adjacent isolation mount is 2.5-3m；The insertion of steel strand wires free end
In casing, butter is filled in the gap between steel strand wires and casing；Outside of sleeve face is provided with corrosion-resistant coating.
Further, the quantity of steel strand wires is equal to the quantity of U-type groove.
Further, down-the-hole drill model SKQ100 type in step 3；The model of step 5 stream line drilling machine extensively visits GY-
2H。
The beneficial effects of the present invention are embodied in:
1, steel strand wires isolation mount provided by the invention and the construction method that the secondary pore-forming of anchor cable is carried out with the bracket, having can grasp
The property made is strong, speed is fast, with strong points.
2, steel strand wires isolation mount provided by the invention and with the bracket carry out the secondary pore-forming of anchor cable construction method and partially
Heart down-the-hole drill casing follow-up drilling construction is compared, and construction cost substantially reduces, and operating expenses concentrates on the secondary pore-forming of anchor cable and replaces
Generation eccentric sleeve of down-the-hole hammer follow-up pore-forming is saved money, live Grouting Cement expense, base pit dewatering, power consumption, tower crane lease, is propped up
Frame, the direct funds saving that secondary pore-forming is laid with the soil body and the duration shortens.
3, steel strand wires isolation mount provided by the invention and the construction method efficiency that the secondary pore-forming of anchor cable is carried out with the bracket
Height, speed improves 3-4 times compared with eccentric down-the-hole drill casing follows up drilling construction.
4, anchor cable steel strand wires are accurately positioned using steel strand wires steel strand wires isolation mount, anchor cable protective layer thickness, spacing obtain
To guarantee, the enhancing of steel strand wires durability, anchor cable construction quality is high, and deep pit monitor is high.
5, using the high pipeline pneumatic mortar material of early strength as anchor rope grouting liquid, anchor cable can shift to an earlier date progress tensioning in 2-3 days, section
The about anchor cable construction duration.
6, construction method provided by the invention is simple, speed is fast, anchor cable Forming Quality is good, construction cost is lower, improves
The construction quality of anchor cable has simultaneously saved the anchor cable construction duration, and the duration completes the positive negative zero node of owner's requirement in advance.Pass through this
The application of engineering method will play good reference function in the construction of later similar engineering.
Other features and advantages of the present invention will be illustrated in the following description, and partly becomes from specification
It is clear that understand through the implementation of the invention.The main object of the present invention and further advantage can be by specifications, power
Specifically noted scheme is achieved and obtained in sharp claim.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing.
Fig. 1 is 4 four steel strand wires isolation mount design drawings of the embodiment of the present invention.
Fig. 2 is 3 three steel strand wires isolation mount design drawings of the embodiment of the present invention.
Fig. 3 is 2 two steel strand wires isolation mount design drawings of the embodiment of the present invention.
Fig. 4 is 5 steel strand wires isolation mount dimensional drawing of the embodiment of the present invention.
Fig. 5 is the antiseptic and rustproof overall diagram of steel strand wires isolation mount.
Fig. 6 is steel strand wires Grouting Pipe figure.
Fig. 7 is steel strand wires Grouting Pipe scheme of installation.
Fig. 8 is anchor cable construction earth excavation figure.
Fig. 9 is anchor cable line setting figure.
Figure 10 is backacter place mat 300mm high 6000mm broad way line chart.
Figure 11 is down-the-hole drill one-step pore-creating.
Figure 12 is: the secondary pore-forming of anchor cable rig and slip casting figure.
Appended drawing reference: 1- isolation mount, 2- injected hole, 3-U type groove, 4- level, 5- down-the-hole drill, 6- anchor cable rig,
7- steel strand wires, 8- corrosion-resistant coating, 9- casing, 10- Grouting Pipe, 11- support pile, 12- backacter, 13- one-step pore-creating.
Specific embodiment
Carry out the technical solution that the present invention will be described in detail by the following examples, embodiment below is only exemplary,
It is only capable of for explanation and illustration technical solution of the present invention, and the limitation to technical solution of the present invention cannot be construed to.
It is twisted according to the steel of 7 radical of foundation pit support construction drawing stream line steel strand wires and anchor cable diameter design such as embodiment 1-5
Line isolation mount.
Embodiment 1, one aspect of the present invention provide steel strand wires isolation mount, and the isolation mount 1 is rounded, isolation mount 1
On be provided with injected hole 2 and one group of U-type groove 3, the notch of U-type groove 3 is arranged outward.The diameter of isolation mount 1 is 110mm-
120mm；The diameter of injected hole 2 is that 10 diameter of 28mm Grouting Pipe is 25mm, 3mm bigger than 10 diameter of Grouting Pipe.Both it can guarantee slip casting
Pipe 10 is not take up other scantlings by 10 hole of Grouting Pipe, moreover it is possible to prevent Grouting Pipe 10 from falling off.The width of U-type groove 3 is
16mm；The width of U-type groove 3 is 0.8mm at least bigger than the diameter of steel strand wires 7, can either guarantee that steel strand wires 7 can be normally inserted into, again
It can prevent from steel strand wires 7 from loosening while facilitating to be bound.It the outer edge of steel strand wires isolation mount and is installed outside rear steel strand wires 7
Skin spacing is greater than 25mm, ensure that anchor cable protective layer thickness, anchor cable quality and durability.The quantity of steel strand wires 7 is equal to U-type groove 3
Quantity.
According to steel strand wires isolation mount process drawing, steel strand wires isolation mount producer process when, need using to the body of rod,
The harmless rigid plastics of injecting paste material carries out factory process and unified dispatching as main material.
Embodiment 2, steel strand wires isolation mount, with embodiment 1, the difference is that, injected hole 2 has one and sets between two parties
It sets on isolation mount 1；There are two U-type grooves 3 and the bisection position of isolation mount 1 is arranged in.Referring to shown in Fig. 3.
Embodiment 3, steel strand wires isolation mount, with embodiment 1, the difference is that, injected hole 2 has one and sets between two parties
It sets on isolation mount 1；There are three U-type grooves 3 and the trisection posistion of isolation mount 1 is arranged in.Referring to shown in Fig. 2.
Embodiment 4, steel strand wires isolation mount, with embodiment 1, the difference is that, injected hole 2 has one and sets between two parties
It sets on isolation mount 1；There are four U-type grooves 3 and the quartering position of isolation mount 1 is arranged in.Shown in referring to Fig.1.
Embodiment 5, steel strand wires isolation mount, with embodiment 1, the difference is that, there are two injected holes 2 and symmetrically sets
It sets in 1 two sides of isolation mount；There are four U-type grooves 3 and symmetrical along axis two sides；The center of circle of axis and injected hole 2 is same
On straight line.Referring to shown in Fig. 4.
The construction method of the secondary pore-forming of anchor cable, construction party are carried out with the steel strand wires isolation mount that above-described embodiment 1-5 is provided
Specific step is as follows for method:
Step 1, earth excavation；By original soil body according to anchorage cable design number of rows stage excavation among drawing, backacter is utilized
12 are excavated at quasi- construction anchor cable hole location or less 600mm level height, roll smooth guarantee down-the-hole drill 5 and are able to carry out construction work
Industry；Referring to shown in Fig. 8.
Step 2, surveying setting-out；The control of anchor cable absolute altitude is carried out using level 4 according to drawing anchorage cable design absolute altitude, is determined
Behind the position of armature boring construction, cross hairs mark is drawn using red paint and determines anchor cable hole location；Referring to shown in Fig. 9.
Step 3, one-step pore-creating 13；Earth excavation extremely, work surface width 6000mm 600mm lower than anchor cable elevation of borehole,
After completing anchor cable hole location label, proper angle alignment is adjusted using SKQ100 type down-the-hole drill 5 and is drawn between support pile 11
Anchor cable hole location cross hairs, smashes bulk rubble and boulder in saturation silty clay, carries out one-step pore-creating 13 to anchor cable hole location；Reference
Shown in Figure 10.
Step 4 is laid with the soil body；Using backacter 12, the travel route of 5 one-step pore-creating 13 of down-the-hole drill is backfilled
300mm high, 6000mm wide, roll smooth, meet secondary pore-forming anchor cable rig 6 traveling and construction operation condition；
Step 5, secondary pore-forming；GY-2H anchor cable rig 6 is visited using wide, hole site is had become to down-the-hole drill 5 and carries out secondary pore-forming,
In 6 two pore forming process of anchor cable rig, being filled the water in drilling into hole, mud is flowed out out of hole by the impact of water in hole,
Reach hole flushing dredging effect；Referring to Fig.1 shown in 1.
Step 6, once grouting；After the drilling of anchor cable rig 6 is easily discharged out of the hole to projected depth, mud, water is replaced with anchor cable
Injection slurry, the interior injection anchor rope grouting liquid side Bian Xiangkong slowly screw out outside hole, slowly screw out the full weight for guaranteeing anchor rope grouting；Due to
Anchor rope grouting liquid density is greater than the density of water and mud, and injection slurry displaces water in anchor cable hole and mud out of hole, because of anchor cable
Injection slurry plays the role of retaining wall, prevents anchor cable hole from collapsing, and ensure that anchor cable drilling diameter and construction quality；As shown in figure 12.
Step 7, as shown in Fig. 5, Fig. 6, Fig. 7, the placement of 7 finished product of steel strand wires；Integral steel strand wires 7 will be installed, steel twists
Line isolation mount, Grouting Pipe 10 are fed together in anchor cable hole, and 10 grout outlet of Grouting Pipe is not more than 300mm apart from bottom hole.
Wherein, 7 finished product of steel strand wires includes casing 9, steel strand wires 7, isolation mount 1, corrosion-resistant coating 8 and butter, and steel strand wires 7 block
It connects in the U-type groove 3 that isolation mount 1 is set, the distance between adjacent isolation mount 1 is 2.5-3m；The insertion of 7 free end of steel strand wires
In casing 9, butter is filled in the gap between steel strand wires 7 and casing 9；9 lateral surface of casing is provided with corrosion-resistant coating 8.
Specific material requirements: first, steel strand wires 7: according to drawing requirement to steel strand wires 7 using J3GY-LD cutting machine into
Row cutting cuts finished product according to length and carries out classification stacking.7 cutting length of steel strand wires includes freedom length, anchoring depth
And active length.7 free segment of steel strand wires need to use 150 mesh sand paper to do processing of rust removing.The steel strand wires 7 that blanking is completed are lain in will
Near the anchor cable hole of construction.Steel strand wires 7 are evenly distributed at the U-type groove 3 on the outside of steel strand wires isolation mount plate body.
Second, casing 9；9 material of casing answer it is smooth, have sufficient intensity, guarantee that it is not damaged during processing and installation
It is bad, and have a water resisting property and chemical stability, it contacts and has no adverse reaction with pipeline pneumatic mortar material or anti-corrosion grease.
Third, Binding material；After the completion of 7 free segment anti-corrosion of steel strand wires, tied up to arranging well laid material in advance and being fixed
It pricks, Binding material uses 22# galvanized wire reinforcing bar wiring.After the completion of steel strand wires 7 and isolation mount 1 are bound, it is isolated in steel strand wires
10 hole of Grouting Pipe in bracket plate body center penetrates Grouting Pipe 10.
Step 8, second pulp feeding；
S1 after the completion of the placement of 7 finished product of steel strand wires, to injection slurry initial set, is starched using pipeline pneumatic mortar material；Pipeline pneumatic mortar material with from
The mass ratio of water is that the grouting material of 1000kg is equipped with the water of 330kg；80% water is added first in high-speed mixer, starts
Blender, low speed rotation are slowly added to whole grouting materials, after stirring 2 minutes, remaining 20% water of addition, and high speed rotation 3 minutes
It can be used；
The slip casting delivery pipe of grouting equipment is connect by S2 with the Grouting Pipe 10 on the steel strand wires 7 being installed, and starts grouting equipment
Carry out slip casting；After injection slurry is from anchor cable hole spilling, Grouting Pipe 10 is gradually extracted out, guarantee completely to starch in anchor cable hole；
Step 9, waist rail, backing plate, anchorage installation and tensioning；The anchor cable steel strand wires 7 that will be completed the process in advance after the completion of anchor rope grouting
It inserts in the hole, steel waist rail, backing plate, anchorage are installed after anchor cable intensity reaches design strength and carry out tensioning.
Steel strand wires isolation mount provided by the invention and the construction method and tradition that the secondary pore-forming of anchor cable is carried out with the bracket
Comparison of the anchor cable drill construction technique in saving expense:
Table 1: projects compare (unit: ten thousand yuan)
In upper table 1, traditional approach expense is total are as follows: 717.61 ten thousand yuan, the expense of this engineering method adds up to 433.99 ten thousand yuan, saves
283.62 ten thousand yuan.
The calculating basis of project in upper table 1:
(1) using the follow-up pore-forming expense of traditional approach bias sleeve of down-the-hole hammer 9: the synthesis of the eccentric follow-up of sleeve of down-the-hole hammer 9 pore-forming
Unit price: 168 yuan/meter (comprehensive unit price of 6 two pore-formings of this engineering method anchor cable rig is 110 yuan/meter) amount to 1688 anchor cables, often
The total length of a piece anchor cable is 20 meters, total total length of anchor cable pore-forming are as follows: 20 meters × 1688=33760 meters.
(2) live anchor cable hole 1688, anchor cable bore dia 150mm, anchor cable hole length 20m.Then cement slurry dosage: 1688 ×
π×0.152× 20=2386.35m3, use traditional approach Grouting Cement expense: cement slurry unit price is 425 yuan/t), the ratio of mud
0.5,32.5 ordinary portland cement density be 1.5t/m3, then cement consumption be 2386.35m3 × 1.5t/m3/1.5 × 0.5=
1749.99t。
Grouting material expense is used using this engineering method:
By this engineering method perfusion grouting material unit price be 750 yuan/t, the ratio of mud 0.23, density 1.5t/m3, then grouting material dosage be
2386.35m³×1.5 t/m³/1.23×0.23=669.34t。
(3) precipitation expense: 1100 meters of live foundation pit perimeter, flatly, live dewatering well amounts to 37 to the every 30m setting of dewatering well
Mouthful.Scene is saved the duration 50 days according to this engineering method, and three machine-teams of daily precipitation, 35 yuan of each machine-team, then added precipitation takes
With for 37 mouthfuls of well × 50 day × 35 yuan/machine-team × 3 machine-teams/day=19.43 ten thousand yuan.
(4) electricity charge: precipitation pump power is 4kw, and 96 degree of daily each well power consumption, the electricity charge are 1.5 yuan/degree, adds up to power consumption expense
With: ten thousand yuan of 50 days × 37 mouthfuls × 96 degree/mouth/day × 1.5 yuan/degree=26.64().
(5) tower crane: rental charge is 45000 yuan/month, and project uses 4 tower cranes altogether, saves work by using this engineering method is accumulative
Phase 50 days, then the tower crane expense saved is ten thousand yuan of 45000 × 4 × 50/30=30()
(6) use 1 expense of this engineering method anchor cable isolation mount: by 0.5 yuan of each bracket calculating, scene need to use 7957 branch altogether
Frame.Amount to 0.8 ten thousand yuan.
(7) secondary pore-forming is laid with soil body expense: 1100 meters of foundation pit perimeter, backfilling height 0.3m, is laid with width 6m, earth volume
For 1100m × 0.3m × 6m=19800m3, backfill unit price is 587.4 yuan/100m3, then backfill expense be 19800m3 ×
587.4 yuan/100m3=11.63 ten thousand yuan.
It can be constructed 20m long anchor cable 15-20 root using the daily anchor cable rig 6 of the secondary pore-forming of anchor cable and down-the-hole drill 5, and
Eccentric sleeve of down-the-hole hammer 9 pore-forming that follows up can construct 20m long anchor cable 5-6 root daily, improve 3-4 times of anchor cable construction speed, saving work
Phase 50 days.
Drilling is saved the duration: 1688/[5 sets of drilling machines × (15 piece/day -5/days)]=34 days；Grouting material reaches in advance
To design strength save the duration: the construction site anchor cable number of plies based on 8 layers, every layer using grouting material shift to an earlier date 2 days enter next step work
Sequence amounts to and saves 8 × 2=16 days.
Then add up to and saves the duration+16 days 34 days=50 days.
In conclusion steel strand wires isolation mount provided by the invention and using steel strand wires isolation mount carry out anchor cable it is secondary
The construction method of pore-forming smashes soil body rubble or boulder, to anchor cable position using the powerful percussive drilling ability of down-the-hole drill 5
One-step pore-creating 13；The anchor cable hole location that one-step pore-creating 13 is completed is carried out using the drilling of anchor cable rig 6, water filling, slip casting function secondary
Mud in hole flushing removal anchor cable hole is filled the water after pore-forming, the high pipeline pneumatic mortar material of early strength is subsequently injected into, because pipeline pneumatic mortar material is close
Degree is greater than mud density, and playing the role of retaining wall prevents anchor cable hole collapsing, and pipeline pneumatic mortar material early strength increases fastly, and anchor cable can mention
Preceding tensioning.It is fast, with strong points with strong operability, speed.Construction cost substantially reduces.With good generalization.
The foregoing is merely the preferable specific embodiments of the present invention, but scope of protection of the present invention is not limited thereto,
The change or replacement that anyone skilled in the art is expected in the technical scope disclosed by the present invention should all be contained
Lid is within protection scope of the present invention.
Claims (10)
1. steel strand wires isolation mount, it is characterised in that: the isolation mount (1) is rounded, and isolation mount is provided with slip casting on (1)
Hole (2) and one group of U-type groove (3), the notch of U-type groove (3) are arranged outward.
2. steel strand wires isolation mount as described in claim 1, which is characterized in that the diameter of isolation mount (1) is 110mm-
120mm；The diameter of injected hole (2) is 28mm.
3. steel strand wires isolation mount as described in claim 1, which is characterized in that the width of U-type groove (3) is 16mm；U-type groove
(3) width is 0.8mm at least bigger than the diameter of steel strand wires (7).
4. steel strand wires isolation mount as described in any one of claims 1-3, which is characterized in that injected hole (2) have one and
It is centrally positioned on isolation mount (1)；There are two U-type grooves (3) and is arranged in the bisection position of isolation mount (1).
5. steel strand wires isolation mount as described in any one of claims 1-3, which is characterized in that injected hole (2) have one and
It is centrally positioned on isolation mount (1)；U-type groove (3) there are three and be arranged isolation mount (1) trisection posistion.
6. steel strand wires isolation mount as described in any one of claims 1-3, which is characterized in that injected hole (2) have one and
It is centrally positioned on isolation mount (1)；There are four U-type grooves (3) and is arranged in the quartering position of isolation mount (1).
7. steel strand wires isolation mount as described in any one of claims 1-3, which is characterized in that injected hole (2) there are two and
It is symmetricly set on isolation mount (1) two sides；There are four U-type grooves (3) and symmetrical along axis two sides；Axis and injected hole (2)
The center of circle on same straight line.
8. carrying out the construction party of the secondary pore-forming of anchor cable with the steel strand wires isolation mount as described in any one of claim 1-7
Method, which is characterized in that specific step is as follows for construction method:
Step 1, earth excavation；By original soil body according to anchorage cable design number of rows stage excavation among drawing, backacter is utilized
(12) it is excavated at quasi- construction anchor cable hole location or less 600mm level height, rolls smooth guarantee down-the-hole drill (5) and be able to carry out and apply
Work industry；
Step 2, surveying setting-out；The control of anchor cable absolute altitude is carried out using level (4) according to drawing anchorage cable design absolute altitude, determines anchor
Behind the position of bar drilling construction, cross hairs mark is drawn using red paint and determines anchor cable hole location；
Step 3, one-step pore-creating；Earth excavation completes anchor to, work surface width 6000mm 600mm lower than anchor cable elevation of borehole
After Suo Kongwei label, the anchor cable hole location ten being drawn between support pile (11) is directed at using down-the-hole drill (5) adjustment proper angle
Wordline, smashes bulk rubble and boulder in saturation silty clay, carries out one-step pore-creating to anchor cable hole location；
Step 4 is laid with the soil body；Using backacter (12), the travel route of down-the-hole drill (5) one-step pore-creating is backfilled
300mm high, 6000mm wide, roll smooth, meet secondary pore-forming anchor cable rig (6) traveling and construction operation condition；
Step 5, secondary pore-forming；Using anchor cable rig (6), hole site is had become to down-the-hole drill (5) and carries out secondary pore-forming, in anchor
In cable rig (6) secondary pore forming process, filled the water in drilling into hole, mud is flowed out out of hole by the impact of water in hole, is reached
It is acted on to hole flushing dredging；
Step 6, once grouting；After anchor cable rig (6) drilling is easily discharged out of the hole to projected depth, mud, water is replaced with anchor cable note
Slurries, the interior injection anchor rope grouting liquid side Bian Xiangkong slowly screws out outside hole, to guarantee the full weight of anchor rope grouting；
Step 7, the placement of steel strand wires (7) finished product；Integral steel strand wires (7), steel strand wires isolation mount, Grouting Pipe will be installed
(10) it is fed together in anchor cable hole, Grouting Pipe (10) grout outlet is not more than 300mm apart from bottom hole；
Step 8, second pulp feeding；
S1 after the completion of the placement of steel strand wires (7) finished product, to injection slurry initial set, is starched using pipeline pneumatic mortar material；
The slip casting delivery pipe of grouting equipment is connect by S2 with the Grouting Pipe (10) on the steel strand wires (7) being installed, and starts slip casting
Equipment carries out slip casting；After injection slurry is from anchor cable hole spilling, gradually Grouting Pipe (10) are extracted out, guarantee completely to starch in anchor cable hole；
Step 9, waist rail, backing plate, anchorage installation and tensioning；The anchor cable steel strand wires that will be completed the process in advance after the completion of anchor rope grouting
(7) it inserts in the hole, steel waist rail, backing plate, anchorage are installed after anchor cable intensity reaches design strength and carry out tensioning.
9. the construction method that steel strand wires isolation mount as claimed in claim 8 carries out the secondary pore-forming of anchor cable, which is characterized in that step
Rapid seven, steel strand wires (7) finished product includes casing (9), steel strand wires (7), isolation mount (1), corrosion-resistant coating (8) and butter, steel strand wires
(7) in the U-type groove (3) of isolation mount (1), the distance between adjacent isolation mount (1) is 2.5-3m for clamping setting；Steel strand wires
(7) in free end insertion casing (9), butter is filled in the gap between steel strand wires (7) and casing (9)；The setting of casing (9) lateral surface
There are corrosion-resistant coating (8).
10. the construction method that steel strand wires isolation mount as claimed in claim 9 carries out the secondary pore-forming of anchor cable, which is characterized in that
The quantity of steel strand wires (7) is equal to the quantity of U-type groove (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811353630.1A CN109208614A (en) | 2018-11-14 | 2018-11-14 | Steel strand wires isolation mount and the construction method that the secondary pore-forming of anchor cable is carried out with the bracket |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811353630.1A CN109208614A (en) | 2018-11-14 | 2018-11-14 | Steel strand wires isolation mount and the construction method that the secondary pore-forming of anchor cable is carried out with the bracket |
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| CN109208614A true CN109208614A (en) | 2019-01-15 |
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| CN201811353630.1A Pending CN109208614A (en) | 2018-11-14 | 2018-11-14 | Steel strand wires isolation mount and the construction method that the secondary pore-forming of anchor cable is carried out with the bracket |
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