CN110306574A - A kind of construction prestressed cable method - Google Patents
A kind of construction prestressed cable method Download PDFInfo
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- CN110306574A CN110306574A CN201910652077.XA CN201910652077A CN110306574A CN 110306574 A CN110306574 A CN 110306574A CN 201910652077 A CN201910652077 A CN 201910652077A CN 110306574 A CN110306574 A CN 110306574A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
- E02D17/20—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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- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to the realm of building construction to provide a kind of construction prestressed cable method, the technical solution is as follows: the following steps are included: S1, drilling aiming at the problem that prestress anchorage cable of constructing in Soft Soil Layer is easy to impact the pulling capacity of prestress anchorage cable；S2, casing；S3, curing process；S4, decentralization anchor cable and slip casting；S5, tensioning fixation.Deep hole is excavated by using vibrating impacter, is conducive to mud and fills into the hole wall of deep hole, is conducive to the compactness for improving soft formation, is conducive to the intensity for enhancing soft formation, is conducive to anchor cable and obtains more preferably pulling capacity.
Description
Technical field
The present invention relates to the realm of building construction, more specifically, it relates to a kind of construction prestressed cable method.
Background technique
Prestress anchorage cable refers to the strand bracket for taking prestressing method anchorage cable anchoring inside rock mass, is used for reinforcing edge
Slope.Anchor cable is anchored into rock mass by anchor head by the hole of rock mass weak structural face, gliding mass and firm ground is linked togather, to change
Become the stress state of slope rock mass, improves the globality and intensity of side slope unstable rock mass.
In general construction prestressed cable, normal spiral drilling machine pore-forming is mostly used, anchor cable, slip casting is transferred, reaches one
Tensioning is carried out after determining intensity.But in the poor soft layer of the self-stabilities such as mud, Extra-fine sand, if applied using common anchor cable
Work method is then difficult to ensure hole quality and obtains ideal pulling capacity.Therefore, how in rich water soft formation progress prestressed anchor
The construction of rope is current urgent problem to be solved.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of construction prestressed cable method, tool
It is more easily adapted to conform in the rich water soft formation the advantages of.
To achieve the above object, the present invention provides the following technical scheme that
A kind of construction prestressed cable method, comprising the following steps:
S1, drilling: deep hole is excavated by vibrating impacter；
S2, casing: in the aperture inner wall fixed sleeving of deep hole；
S3, curing process: sludge curing agent is added into deep hole, and the mud stirred into deep hole is fully cured；
S4, decentralization anchor cable and slip casting: anchor cable is transferred into deep hole, and the cement injection slurries into deep hole, works as cement slurry
Liquid rise to the position apart from outlet of deep hole be 5-10cm when, stop slip casting；
S5, tensioning fixation: dowel tensioning special equipment tension anchor cable is used, and locks anchor cable.
By adopting the above technical scheme, deep hole is excavated by using vibrating impacter, so that mud in deep hole is without mined,
Be conducive to mud to fill into the hole wall of deep hole, to be conducive to improve the compactness of soft formation, and then be conducive to enhance softly
The intensity of layer, and then be conducive to anchor cable and obtain more preferably pulling capacity；By the aperture inner wall fixed sleeving in deep hole, be conducive to
Reinforcement is carried out to the aperture of deep hole, so that aperture is more not easy to collapse during slip casting, so that grouting operation is more
It is easy；By the way that sludge curing agent is added into deep hole, so that being not easy that there are moisture in deep hole, to be conducive to enhance mud
Intensity, and then be conducive to enhance the intensity of soft formation, so that anchor cable is easier to obtain ideal pulling capacity, meanwhile, be conducive to subtract
Erosion of the moisture to cement grout in small deep hole, so that the compression strength after the cement grout in deep hole solidifies more is not easy
It is affected；In addition, by be added sludge curing agent to solidify the mud in deep hole so that the construction of prestress anchorage cable be not necessarily into
Row borehole cleaning operation, consequently facilitating the construction of prestress anchorage cable.
The present invention is further arranged to: in the step S2, the length of casing is 80-90cm.
By adopting the above technical scheme, it is 80-90cm by the length for controlling casing, is conducive to casing preferably to deep hole hole
Mouth is supported, so that outlet of deep hole is more not easy to collapse during slip casting；Meanwhile being conducive to the construction of casing, it reduces
The length of casing is too long and casing is caused to be difficult to be inserted into deep hole, and then causes to be difficult to the case where constructing.
The present invention is further arranged to: in the step S4, the grouting pressure of control cement injection slurries is 2-3MPa.
By adopting the above technical scheme, it is 2-3MPa by the grouting pressure for controlling cement injection slurries, is conducive to cement slurry
Liquid preferably injects in deep hole, meanwhile, so that cement grout is easier the mud of extrusion deep hole hole wall, so that Soft Soil Layer is closely knit
Du Genggao, also helps the contact area of the mud of enhancing cement grout and deep hole hole wall, and then is conducive to enhance cement grout
Reinforcing effect to Soft Soil Layer, so that anchor cable is easier to obtain ideal pulling capacity.
The present invention is further arranged to: the cement grout includes the component of following mass fraction:
70-80 parts of portland cement；
15-20 parts of water；
60-70 parts of nanometer calcium carbonate；
1-2 parts of aluminium powder；
3-5 parts of formamide；
0.5-1 parts of vaseline；
5-10 parts of calcium bicarbonate.
By adopting the above technical scheme, by the way that nanometer calcium carbonate is added as fine aggregate reinforcement cement grout, so that cement slurry
Coarse aggregate is not present in liquid, thus be conducive to enhance the mobility of cement grout, so that after cement grout injection deep hole, cement grout
It more easily penetrates into the soil of inner walls of deep holes, and then is conducive to increase the contact area of cement grout and inner walls of deep holes soil,
So that cement grout is easier to combine together with soil, be conducive to cement grout preferably reinforcement Soft Soil Layer, so that anchor cable more holds
Easily obtain ideal pulling capacity；
By using the coordinated of aluminium powder and formamide and vaseline, is conducive to aluminium powder and is formed on cement grout surface
Protective filmy layer, meanwhile, aluminium is easy to oxidation by air to form fine and close oxidation film, to be conducive to enhance cement grout
Resistance to corrosion, so that in the moisture and Soft Soil Layer that ooze out in deep hole there is corrosive substance to be more not easy eroding water
Slurry liquid, so that the compression strength of cement grout is more not readily susceptible to influence, meanwhile, it is conducive to extend cement grout
Service life, so that cement grout preferably reinforcement Soft Soil Layer, and then be conducive to anchor cable and obtain ideal pulling capacity；
By being added calcium bicarbonate, calcium bicarbonate be easy with the hydroxyl that hydrolyzes to form of silicate ion in cement grout or
The hydroxyl that other substances are formed is combined to form the biggish calcium carbonate of partial size using as aggregate, to be conducive to increase cement slurry
Aggregate content in liquid, so that the compression strength of cement grout is stronger, and then is conducive to cement grout preferably reinforcement Soft Soil Layer,
So that anchor cable is easier to obtain ideal pulling capacity；Meanwhile calcium bicarbonate is in conjunction with the hydroxyl in cement grout, so that cement
It is not easy that there are hydroxyls in slurries, so that advantageously reducing hydroxyl is easy the case where reacting with aluminium powder, so that
Cement grout surface is not readily susceptible to influence by the protecting film that aluminium powder is formed, so that the corrosion resistance of cement grout is stronger, into
And the compression strength after cement grout is solidified more is not readily susceptible to the influence of the moisture in Soft Soil Layer, is conducive to extend water
The service life of slurry liquid is conducive to cement grout preferably reinforcement Soft Soil Layer, so that anchor cable is easier to obtain preferably
Pulling capacity；In addition, calcium bicarbonate is in conjunction with the hydroxyl in cement grout, so that be not easy in cement grout there are hydroxyl,
So that the metal ion in cement grout is not easy in conjunction with hydroxyl, and then advantageously reduces cement grout and the accumulation of salt in the surface soil occur
The case where phenomenon.
The present invention is further arranged to: the cement grout further includes the component of following mass fraction:
50-55 parts of nano silica；
10-15 parts of polyacrylate；
3-5 parts of silane coupling agent.
By adopting the above technical scheme, match by using nano silica, polyacrylate with cooperateing with for silane coupling agent
It closes, silane coupling agent can be attached to the surface of nano silica, and the surface for being conducive to nano silica forms one layer of organic matter
Film, so that the particle surface tension of nano silica reduces, so that the steric hindrance of nano silica increases, thus favorably
Be dispersed in cement grout in nano silica, meanwhile, silane coupling agent also help enhancing nano silica with
The interface affinity of polyacrylate so that nano silica is easier to form micella with polyacrylate, and then is conducive to
Silica forms the biggish aggregate of partial size in conjunction with polyacrylate, is conducive to the pressure resistance to the cement grout after solidification
Degree carries out reinforcement, so that cement grout makes the compression strength of the cement grout after solidification not while having good mobility
It is easy to be affected；Meanwhile nano silica also has certain thixotropy, thus be conducive to the consistency of cement grout into
Row adjust so that cement grout stand when consistency enhancing so that the aggregate in cement grout do not allow more it is easily settled, in turn
The density uniformity for being conducive to improve cement grout, so that the stability of cement grout is higher, so that the pressure resistance of cement grout
It spends stronger, and then is conducive to cement grout preferably reinforcement Soft Soil Layer, is conducive to anchor cable and obtains ideal pulling capacity.
The present invention is further arranged to: the cement grout further includes the component of following mass fraction:
2-5 parts of titanium dioxide.
By adopting the above technical scheme, by the way that titanium dioxide is added, be conducive to the corrosion resistance for enhancing cement grout, so that water
Compression strength after slurry liquid solidification is more not readily susceptible to the influence of the moisture in Soft Soil Layer, is conducive to extend cement grout
Service life, to be conducive to cement grout preferably reinforcement Soft Soil Layer, so that anchor cable is easier to obtain ideal drawing
Power.
The present invention is further arranged to: the cement grout further includes the component of following mass fraction:
1-2 parts of accelerator.
By adopting the above technical scheme, by addition accelerator, be conducive to the setting rate for accelerating cement grout, so that
Aggregate in cement grout is not allowed more easily settled, is conducive to aggregate and is preferably dispersed in cement grout, and then advantageous
In the stability for improving cement grout, so that the compression strength after cement grout solidification is more not readily susceptible to influence, Jin Eryou
Conducive to the preferably reinforcement Soft Soil Layer of the cement grout after solidification, so that anchor cable is easier to obtain ideal pulling capacity.
The present invention is further arranged to: the cement grout further includes the component of following mass fraction:
0.1-0.5 parts of lotus leaf powder.
By adopting the above technical scheme, by the way that lotus leaf powder is added, be conducive to the water repelling property for enhancing cement grout, so that cement
Slurries are more not susceptible to the erosion of the moisture in Soft Soil Layer, so that the compression strength after cement grout solidification is not allowed more
Vulnerable to influence, it is conducive to extend the service life of cement grout, and then is conducive to cement grout preferably reinforcement Soft Soil Layer, is made
Anchor cable is obtained to be easier to obtain ideal pulling capacity.
In conclusion the invention has the following advantages:
1. excavating deep hole by using vibrating impacter, is conducive to mud and fills into the hole wall of deep hole, be conducive to improve softly
The compactness of layer is conducive to the intensity for enhancing soft formation, is conducive to anchor cable and obtains more preferably pulling capacity；
2. being made by the aperture inner wall fixed sleeving in deep hole so that aperture is more not easy to collapse during slip casting
It is easier to obtain grouting operation；
3. by the way that sludge curing agent is added into deep hole, so that being not easy to be conducive to enhance softly there are moisture in deep hole
The intensity of layer, so that anchor cable is easier to obtain ideal pulling capacity, meanwhile, be conducive to reduce the moisture in Soft Soil Layer to cement slurry
The erosion of liquid, so that the compression strength after the cement grout in deep hole solidifies more is not readily susceptible to influence；
4. being conducive to cement grout surface by using the coordinated of aluminium powder and formamide and vaseline and forming densification
Oxidation film, be conducive to enhance cement grout resistance to corrosion so that the compression strength of cement grout is more not readily susceptible to
It influences, so that cement grout preferably reinforcement Soft Soil Layer, is conducive to anchor cable and obtains ideal pulling capacity；
5. by the way that calcium bicarbonate is added, calcium bicarbonate is easy in conjunction with the hydroxyl in cement grout to form solid carbonic acid
Calcium is conducive to the compression strength for improving cement grout, so that cement grout preferably reinforcement Soft Soil Layer, so that anchor cable is easier to obtain
Obtain ideal pulling capacity.
Specific embodiment
With reference to embodiments, invention is further described in detail.
In following embodiment, sludge curing agent uses sludge curing agent generally in the art, specifically, in following embodiment
Sludge curing agent be all made of the sludge curing agent of Henan Hai Yun Environmental Protection Technology Co., Ltd.
In following embodiment, portland cement uses the Wa stone P.O42.5 portland cement of Wuhan Yangluo cement plant production.
In following embodiment, nanometer calcium carbonate uses the nanometer calcium carbonate of Guangzhou Rong Yue industrial chemicals Co., Ltd.
In following embodiment, formamide use the article No. of Shandong De Yan Chemical Co., Ltd. for 054 formamide.
In following embodiment, vaseline use the article No. of Shandong De Yan Chemical Co., Ltd. for 046 vaseline.
In following embodiment, nano silica uses the article No. of Jiangsu Tian Hang new material Co., Ltd for the nanometer of H10
Silica.
In following embodiment, polyacrylate uses the polyacrylate of Guangzhou Sheng Xin Chemical Industry Science Co., Ltd.
In following embodiment, silane coupling agent uses the model KH-550 article No. of Henan Sai En chemical products Co., Ltd
For 20190118 silane coupling agent.
In following embodiment, titanium dioxide uses the article No. of new material Science and Technology Ltd., Guangdong Cigna for the titanium white of DR2588
Powder.
In following embodiment, accelerator uses the accelerator of the model sn257 of Guangzhou Gongshi chemical materials Co., Ltd.
In following embodiment, lotus leaf powder uses the lotus leaf powder of Xinghua City Hong Chuan Food Co., Ltd.
Embodiment 1
A kind of construction prestressed cable method, comprising the following steps:
S1, drilling, specific as follows:
Deep hole is excavated using vibrating impacter according to the design position of design drawing.
S2, casing, specific as follows:
In the aperture inner wall fixed sleeving of deep hole, so that casing is close to the aperture inner wall of deep hole, wherein the length of casing is
80cm。
S3, curing process, specific as follows:
Sludge curing agent is added into deep hole, and the mud stirred into deep hole is fully cured.
S4, decentralization anchor cable and slip casting, specific as follows:
Anchor cable is transferred into deep hole, and the cement injection slurries into deep hole, the pressure for controlling slip casting is 2MPa, works as cement
Slurries rise to the position apart from outlet of deep hole be 5cm when, stop slip casting.
S5, tensioning fixation, specific as follows:
Tensioning uses hydraulic jack, when placing jack, keeps anchorage base top surface vertical with drilling axis, to ensure anchor
Very heavy ejecting force and anchor cable on the same axis, finally lock anchor cable, that is, complete the construction of prestress anchorage cable when cable stretching.
Wherein, cement grout includes the component of following mass fraction:
Portland cement 70kg；Water 20kg；Nanometer calcium carbonate 65kg；Aluminium powder 1kg；Formamide 5kg；Vaseline 0.75kg；
Calcium bicarbonate 10kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 70kg, water 20kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 1kg, formamide 5kg, vaseline 0.75kg, calcium bicarbonate are added while stirring
10kg after being uniformly mixed, then is added nanometer calcium carbonate 65kg while stirring, stirs evenly to get cement grout.
Embodiment 2
A kind of construction prestressed cable method, comprising the following steps:
S1, drilling, specific as follows:
Deep hole is excavated using vibrating impacter according to the design position of design drawing.
S2, casing, specific as follows:
In the aperture inner wall fixed sleeving of deep hole, so that casing is close to the aperture inner wall of deep hole, wherein the length of casing is
85cm。
S3, curing process, specific as follows:
Sludge curing agent is added into deep hole, and the mud stirred into deep hole is fully cured.
S4, decentralization anchor cable and slip casting, specific as follows:
Anchor cable is transferred into deep hole, and the cement injection slurries into deep hole, the pressure for controlling slip casting is 2.5MPa, works as water
Slurry liquid rise to the position apart from outlet of deep hole be 8cm when, stop slip casting.
S5, tensioning fixation, specific as follows:
Tensioning uses hydraulic jack, when placing jack, keeps anchorage base top surface vertical with drilling axis, to ensure anchor
Very heavy ejecting force and anchor cable on the same axis, finally lock anchor cable, that is, complete the construction of prestress anchorage cable when cable stretching.
Wherein, cement grout includes the component of following mass fraction:
Portland cement 75kg；Water 15kg；Nanometer calcium carbonate 70kg；Aluminium powder 1.5kg；Formamide 3kg；Vaseline 1kg；Carbon
Sour hydrogen calcium 5kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 75kg, water 15kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 1.5kg, formamide 3kg, vaseline 1kg, calcium bicarbonate 5kg are added while stirring,
After being uniformly mixed, then nanometer calcium carbonate 70kg is added while stirring, stirs evenly to get cement grout.
Embodiment 3
A kind of construction prestressed cable method, comprising the following steps:
S1, drilling, specific as follows:
Deep hole is excavated using vibrating impacter according to the design position of design drawing.
S2, casing, specific as follows:
In the aperture inner wall fixed sleeving of deep hole, so that casing is close to the aperture inner wall of deep hole, wherein the length of casing is
90cm。
S3, curing process, specific as follows:
Sludge curing agent is added into deep hole, and the mud stirred into deep hole is fully cured.
S4, decentralization anchor cable and slip casting, specific as follows:
Anchor cable is transferred into deep hole, and the cement injection slurries into deep hole, the pressure for controlling slip casting is 3MPa, works as cement
Slurries rise to the position apart from outlet of deep hole be 10cm when, stop slip casting.
S5, tensioning fixation, specific as follows:
Tensioning uses hydraulic jack, when placing jack, keeps anchorage base top surface vertical with drilling axis, to ensure anchor
Very heavy ejecting force and anchor cable on the same axis, finally lock anchor cable, that is, complete the construction of prestress anchorage cable when cable stretching.
Wherein, cement grout includes the component of following mass fraction:
Portland cement 80kg；Water 17.5kg；Nanometer calcium carbonate 60kg；Aluminium powder 2kg；Formamide 4kg；Vaseline 0.5kg；
Calcium bicarbonate 7.5kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg after being uniformly mixed, then is added nanometer calcium carbonate 60kg while stirring, stirs evenly to get cement grout.
Embodiment 4
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 50kg；Polyacrylate 15kg；Silane coupling agent 5kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 50kg, polyacrylate 15kg, silane coupling agent 5kg, after being uniformly mixed, then while stirring
Nanometer calcium carbonate 60kg is added, stirs evenly to get cement grout.
Embodiment 5
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 52.5kg；Polyacrylate 12.5kg；Silane coupling agent 3kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 52.5kg, polyacrylate 12.5kg, silane coupling agent 3kg, after being uniformly mixed, then side is stirred
It mixes side and nanometer calcium carbonate 60kg is added, stir evenly to get cement grout.
Embodiment 6
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 55kg；Polyacrylate 10kg；Silane coupling agent 4kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 55kg, polyacrylate 10kg, silane coupling agent 4kg, after being uniformly mixed, then while stirring
Nanometer calcium carbonate 60kg is added, stirs evenly to get cement grout.
Embodiment 7
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Polyacrylate 10kg；Silane coupling agent 4kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, polyacrylate 10kg, silane coupling agent 4kg, after being uniformly mixed, then are added nanometer calcium carbonate while stirring
60kg stirs evenly to get cement grout.
Embodiment 8
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 55kg；Silane coupling agent 4kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 55kg, silane coupling agent 4kg, after being uniformly mixed, then are added nanometer calcium carbonate while stirring
60kg stirs evenly to get cement grout.
Embodiment 9
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 55kg；Polyacrylate 10kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 55kg, polyacrylate 10kg, after being uniformly mixed, then are added nanometer calcium carbonate while stirring
60kg stirs evenly to get cement grout.
Embodiment 10
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 50kg；Polyacrylate 15kg；Silane coupling agent 4kg；Titanium dioxide 3.5kg；Accelerator 2kg；
Lotus leaf powder 0.1kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 50kg, polyacrylate 15kg, silane coupling agent 4kg, titanium dioxide 3.5kg, accelerator 2kg, lotus
Leaf powder 0.1kg after being uniformly mixed, then is added nanometer calcium carbonate 60kg while stirring, stirs evenly to get cement grout.
Embodiment 11
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 52.5kg；Polyacrylate 10kg；Silane coupling agent 5kg；Titanium dioxide 5kg；Accelerator 1kg；
Lotus leaf powder 0.5kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 52.5kg, polyacrylate 10kg, silane coupling agent 5kg, titanium dioxide 5kg, accelerator 1kg, lotus
Leaf powder 0.5kg after being uniformly mixed, then is added nanometer calcium carbonate 60kg while stirring, stirs evenly to get cement grout.
Embodiment 12
Difference with embodiment 3 is:
Cement grout further includes the component of following mass fraction:
Nano silica 55kg；Polyacrylate 12.5kg；Silane coupling agent 3kg；Titanium dioxide 2kg；Accelerator
1.5kg；Lotus leaf powder 0.3kg.
Cement grout the preparation method is as follows: in 250L stirred tank be added portland cement 80kg, water 17.5kg, with
The revolving speed of 350r/min is stirred, and aluminium powder 2kg, formamide 4kg, vaseline 0.5kg, calcium bicarbonate are added while stirring
7.5kg, nano silica 55kg, polyacrylate 12.5kg, silane coupling agent 3kg, titanium dioxide 2kg, accelerator 1.5kg,
Lotus leaf powder 0.3kg after being uniformly mixed, then is added nanometer calcium carbonate 60kg while stirring, stirs evenly to get cement slurry
Liquid.
Comparative example 1
The difference from embodiment 1 is that: lack component aluminium powder in cement grout.
Comparative example 2
The difference from embodiment 1 is that: lack component formamide in cement grout.
Comparative example 3
The difference from embodiment 1 is that: lack component vaseline in cement grout.
Comparative example 4
The difference from embodiment 1 is that: lack component calcium bicarbonate in cement grout.
Experiment 1
It is detected according to GB50107-2010 " Standard for inspection and assessment of strength of concrete " by above embodiments and comparative example system
Compression strength (MPa) after standby resulting cement grout solidification, then solidification is impregnated from the slime water taken out in Soft Soil Layer in deep hole
Cement grout afterwards 60 days detects the compression strength (MPa) of the cement grout of the solidification after slime water impregnates again.
Experiment 2
Above embodiments are detected using the SW-300 anchor rod drawing instrument of Beijing SeaBird high-tech Science and Technology Ltd. and are compared
The pulling capacity (kN) of the resulting prestress anchorage cable of example construction.
The detection data tested above is shown in Table 1.
Table 1
It can be obtained according to the data comparison of embodiment 1-3 in table 1 and comparative example 1-4, embodiment 1-3 is all made of aluminium powder, formyl
Amine, vaseline and calcium bicarbonate coordinated have lacked component aluminium powder to prepare cement grout in comparative example 1, in comparative example 2
Lack component formamide, component vaseline has been lacked in comparative example 3, lacks calcium bicarbonate in comparative example 4, and embodiment 1-
The difference of compression strength before 3 compression strength and processing after slime water impregnates is respectively less than comparative example 1-4, and embodiment
The pulling capacity of the prestress anchorage cable of 1-3 is above comparative example 1-4's, illustrates by using aluminium powder, formamide, vaseline and carbon
Sour hydrogen calcium coordinated is conducive to the resistance to corrosion for enhancing cement grout, so that the cement grout after solidification is not readily susceptible to
The erosion of slime water is conducive to cement grout preferably so that the compression strength after cement grout solidification is not readily susceptible to influence
Reinforcement Soft Soil Layer, and then be conducive to prestress anchorage cable and obtain ideal pulling capacity；In addition, the compression strength of comparative example 4 is lower than real
A 1-3 is applied, illustrates to be conducive to calcium bicarbonate in conjunction with the hydroxyl in cement grout to form carbon by the way that calcium bicarbonate is added
Sour calcium aggregate, to be conducive to the compression strength of reinforcement cement grout.
It can be obtained according to the data comparison of embodiment 1-3 in table 1 and embodiment 4-6, embodiment 4-6 is more newly-increased than embodiment 1-3
Component nano silica, polyacrylate and silane coupling agent, the compression strength and prestress anchorage cable of embodiment 4-6
Pulling capacity be all larger than embodiment 1-3, illustrate by using nano silica, polyacrylate and silane coupling agent
Coordinated, be conducive to silica under the action of silane coupling agent in conjunction with polyacrylate to form the biggish bone of partial size
Material is conducive to cement grout preferably reinforcement Soft Soil Layer to be conducive to the compression strength of the cement grout after reinforcement solidification, into
And prestress anchorage cable is made to be easier to obtain ideal pulling capacity.
It can be obtained according to the data comparison of embodiment 4-6 in table 1 and embodiment 7-9, embodiment 4-6 is all made of nanometer titanium dioxide
Silicon, polyacrylate and silane coupling agent coordinated have lacked component nano-silica to prepare cement grout in embodiment 7
SiClx has lacked component polypropylenes acid esters in embodiment 8, has lacked component silane coupling agent in embodiment 9, and embodiment 4-6
Compression strength and the pulling capacity of prestress anchorage cable be above embodiment 7-9, illustrate only when nano silica, poly- third
When olefin(e) acid ester and silane coupling agent coordinated, the work of the compression strength of the cement grout after could preferably playing enhancing solidification
With, thus be conducive to cement grout preferably reinforcement Soft Soil Layer, so that prestress anchorage cable is easier to obtain ideal pulling capacity, it is scarce
Lack any component to be easy to have an impact the compression strength of cement grout, and then is easy the drawing obtained to prestress anchorage cable
Power has an impact.
It can be obtained according to the data comparison of embodiment 4-6 in table 1 and embodiment 10-12, embodiment 10-12 is than embodiment 4-6
Component titanium dioxide, accelerator and lotus leaf powder, the compression strength of embodiment 10-12 and the pulling capacity of prestress anchorage cable are increased newly
It is above embodiment 4-6, and
The variation of the compression strength after slime water immersion treatment of embodiment 10-12 is respectively less than embodiment 4-6, explanation
By the way that titanium dioxide, accelerator and lotus leaf powder is added, the compression strength of the cement grout after being conducive to enhancing solidification, meanwhile, have
Conducive to the corrosion resistance of the cement grout after enhancing solidification, so that the compression strength after cement grout solidification is more not susceptible to
The erosion of slime water into Soft Soil Layer, and then be conducive to the cement grout preferably reinforcement Soft Soil Layer after solidification, so that answering in advance
Power anchor cable is easier to obtain ideal pulling capacity.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of construction prestressed cable method, it is characterized in that: the following steps are included:
S1, drilling: deep hole is excavated by vibrating impacter；
S2, casing: in the aperture inner wall fixed sleeving of deep hole；
S3, curing process: sludge curing agent is added into deep hole, and the mud stirred into deep hole is fully cured；
S4, decentralization anchor cable and slip casting: anchor cable is transferred into deep hole, and the cement injection slurries into deep hole, when on cement grout
When to rise to position apart from outlet of deep hole be 5-10cm, stop slip casting；
S5, tensioning fixation: dowel tensioning special equipment tension anchor cable is used, and locks anchor cable.
2. construction prestressed cable method according to claim 1, it is characterized in that: in the step S2, the length of casing
For 80-90cm.
3. construction prestressed cable method according to claim 1, it is characterized in that: controlling priming petock in the step S4
The grouting pressure of slurry liquid is 2-3MPa.
4. construction prestressed cable method according to claim 1 to 3, it is characterized in that: the cement grout include with
The component of lower mass fraction:
70-80 parts of portland cement；
15-20 parts of water；
60-70 parts of nanometer calcium carbonate；
1-2 parts of aluminium powder；
3-5 parts of formamide；
0.5-1 parts of vaseline；
5-10 parts of calcium bicarbonate.
5. construction prestressed cable method according to claim 4, it is characterized in that: the cement grout further includes following matter
Measure the component of number:
50-55 parts of nano silica；
10-15 parts of polyacrylate；
3-5 parts of silane coupling agent.
6. construction prestressed cable method according to claim 4, it is characterized in that: the cement grout further includes following matter
Measure the component of number:
2-5 parts of titanium dioxide.
7. construction prestressed cable method according to claim 4, it is characterized in that: the cement grout further includes following matter
Measure the component of number:
1-2 parts of accelerator.
8. construction prestressed cable method according to claim 4, it is characterized in that: the cement grout further includes following matter
Measure the component of number:
0.1-0.5 parts of lotus leaf powder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111749246A (en) * | 2020-06-17 | 2020-10-09 | 中铁十六局集团地铁工程有限公司 | Installation method of prestressed anchor cable of water-rich sand layer |
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Application publication date: 20191008 |