CN104141308A - Drill hole prepacked aggregate concrete construction method - Google Patents
Drill hole prepacked aggregate concrete construction method Download PDFInfo
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- CN104141308A CN104141308A CN201410347738.5A CN201410347738A CN104141308A CN 104141308 A CN104141308 A CN 104141308A CN 201410347738 A CN201410347738 A CN 201410347738A CN 104141308 A CN104141308 A CN 104141308A
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Abstract
The invention discloses a drill hole prepacked aggregate concrete construction method. The method comprises the steps of (a) construction preparation, (b) reconnaissance and hole forming, (c) prepacked aggregate concrete testing, (d) preparation conducted before hole drilling, (e) hole drilling, (f) hole drilling cleaning, (g) pressurized-water testing conducted before prepacked aggregate concrete construction, (h) mortar production station building, (i) mortar production, (j) prepacked aggregate concrete hole prepacked aggregate concrete construction and (k) hole sealing. A reserved prepacked aggregate concrete hole is preformed, a prepacked aggregate concrete pipe is inserted into the prepacked aggregate concrete hole and connected with a mortar injection pipe, the mortar injection pipe enables prepacked aggregate concrete liquid to be directly injected into the prepacked aggregate concrete hole, and then pressure grouting construction is carried out continuously and uninterruptedly. Stone blocks do not need to be crushed to stir concrete. The prepacked aggregate concrete liquid slowly rises from the prepacked aggregate concrete hole in a template, so that water in coarse aggregate gaps can be completely changed into the prepacked aggregate concrete liquid during underwater construction, and concrete with high quality can be easily made. No stirring machines are needed for aggregate stirring, and the construction progress can be easily accelerated. Only cement mortar needs to be pumped during pumping, and the pumping technology is improved compared with common concrete.
Description
Technical field
The present invention relates to a kind of boring and rise concrete grout construction method.
Background technology
Construction cofferdam and foundation ditch are the piths that dock is built.Construction cofferdam expense generally accounts for 15%～20% of gross investment, and technical difficulty is high, has a big risk, and the duration is also longer, is related to success or failure, quality and the duration of engineering, and its design and construction one is to being the focus that industry peer payes attention to.
When the construction dock engineering waterborne of batholith area, ordinary priority is considered to utilize prefabricated reinforced concrete caisson as the agent structure in cofferdam in recent years.Rise the waterstop constructions such as slurry technology and high undersea hydrostatic pressures churning under water, greatly reduce Temporary Cofferdam construction costs, for the success of the prefabricated reinforced concrete caisson under rock foundation condition and extensive use provide may.Adopt and rise slurry riprap foundation caisset.Caisson along dock both sides can be used as outfitting quay and dock wing wall simultaneously.After major project has been constructed, northwest side earth rock cofferdam and the cofferdam of blocking up must be removed, and southern side caisson cofferdam is retained as harbour.Adopt and rise slurry method backfilling cement mortar in the rubble bedding of caisson bottom, rise with the curtain of bottom basement rock the water-stop curtain that slurry is connected to form cofferdam.
Rising slurry engineering is the first link of preventing leaking water engineering, rises the quality of slurry quality, directly has influence on carrying out smoothly of postorder construction works.Existing boring rises the mixed concrete construction of slurry, need to use grating stone and carry out ready-mixed concrete, not only needs wasting manpower and material resources to transport grating stone, and increases difficulty of construction, increases construction cost.
Summary of the invention
The object of the present invention is to provide a kind of boring to rise concrete grout construction method, by prefabricated reserved liter slurry hole, and insert arising pipe in liter slurry hole, arising pipe is connected to Grouting Pipe, Grouting Pipe will rise slurries and directly inject in liter slurry hole, then carry out mud jacking construction, continuous, uninterrupted mud jacking.Without grating stone, carry out ready-mixed concrete; Rise slurries and slowly start upwards from the liter slurry hole of template, therefore the water in coarse aggregate space all can be replaced as and rise slurries during subaqueous construction, more easily produce quality concrete; Without mixer mix aggregate, easy construction, is beneficial to accelerating construction progress; During pumping, only need pump cement mortar, than its pumping technology of ordinary concrete, improve.
In order to solve the problems of the technologies described above, adopt following technical scheme:
Boring rises a concrete grout construction method, it is characterized in that comprising the steps:
(a) preparation of construction:
1. technology is prepared:
The personnel of organizational technology are familiar with drawing, measure and check the parameters such as figure paper size, engineering quantity, and induction-arrangement is queried; In the meeting of confiding a technological secret by management, design organization, clearly demonstrate, understand design idea, write < < Design of Construction Organization > > and < < job instruction > >, work out each the work items Construction Plan network, report management portion examines;
2. goods and materials are prepared:
Goods and materials preparation mainly comprises two of material and facilities, and material mainly contains cement, water, Admixture, admixture etc.; Equipment mainly contains rig and rises two kinds of slurry equipment, and rig comprises geological drilling rig, drilling rod, high-pressure clear water pump, mateiral pump, air compressor, drilling tool, drill bit, pressure hose, feed pipe and valve etc.; Rise slurry equipment and comprise mortar pump, homogenizer, arising pipe, flow meter, pressure meter, liter slurry plug, the automatic slurry recorder etc. that rises; In above goods and materials, cement is responsible for being supplied to warehouse, project management department building site by owner, and other goods and materials are purchased voluntarily by project management department;
(b) prospecting cloth hole:
First according to construction requirement exploratory hole position, spacing, and set up technology hole, in technology hole, get undisturbed soil sample, make technician grasp foundation soil and distribute, and the projected depth in definite hole; Adopt and drill the exploration means combining with feeler inspection, determine the arrangement in hole; Arrangement principle is: adopt quincuncial arrangement mode, pitch-row is within the scope of 2.1～3.0m, and array pitch is within the scope of 2.8～3.1m;
(c) rise slurry test:
1. slurry test: the slurries that rise that testing crew is drafted Different Water-Cement Ratio, different admixture and different Admixtures according to ground clay distribution situation are tested, admixture comprises and mixes sand, cohesive soil, flyash and water glass etc.; Admixture comprises accelerating admixture, water reducing agent, stabilizing agent, and other Admixtures of supervisor's approval; The mass parts scope that rises each component of slurries of wherein drafting is: water quality part is 30～40, and cement quality part is 65～80, and admixture mass parts is 60～70, and Admixture mass parts is 10～15; The different component of drafting is risen to slurries and carries out respectively the test of following items:
A, rise slurries preparation procedure and mixing time;
B, rise serum density test;
C, rise slurry fluidity or rheological parameter;
D, rise pulp stability;
F, rise the cohesive force of slurries;
G, the unit weight that rises slurries calculus, intensity, modulus of elasticity and permeability;
And obtain respectively corresponding test report, and to submit management portion and examine, management, according to every test report, is tentatively determined and is risen each component parameter of slurries;
2. rise slurry test: extensive, rise before slurry, carry out rising concrete grout simulated test, first arrange and rise slurry test hole, be divided into two, the long 24m of the direction that parallels to the axis, the long 8m of vertical axis direction, area 192m
2, cover plate concrete thickness is 0.8m; Rise slurry trial zone and select the geological conditions location similar to actual Sheng Jiang district;
In trial zone, arrange and rise slurry position, hole, selected test of formulating rises slurry hole arrangement, hole depth.Rise slurry segmentation, rise slurry pressure and other parameters, construction sequence and the method by developing programs, drafted are tested, and off-test is arranged test hole and checked and rises slurry effect, the test datas such as the unit permeability rate of each order hole of finishing analysis and test hole, unit ash consumption; Then carry out pressure-casting construction, by controlling water/binder ratio, change other because usually guaranteeing Pumping concrete intensity, determine the impact of other factors on concrete strength; Finally write test report, report management portion examines, and management, according to above-mentioned every test report, is finally determined and risen each component parameter of slurries;
(d) before boring, prepare:
Built-in slip casting pipe: press the spacing built-in slip casting pipe of 2.1～3.0m on the exterior wall of bedding, and check installation site, the grouting port of Grouting Pipe is aimed at the design attitude of corresponding aperture;
Geological drilling rig is in place: first, along toe board face, use i iron to lay light rail, and directly fixedly drilling cramp and geological drilling rig on the light rail of river-bed section, bank slope section is made brill filling chassis fixedly drilling cramp and rig; Then brill is filled with to chassis and move along toe board face, with 2 5t guide chain tractions, with wire rope, be fixed on the anchoring pile of toe board face; Meanwhile, adopt autocrane geological drilling rig is transported to light rail and bores and fill with on chassis, indivedual positions are by artificial dismounting carrying;
(e) boring:
First, bore position is measured setting-out according to design drawing, and unified being numbered, is divided into YuⅡXu hole, I order hole; Then start boring, adopt geological drilling rig to carry out bore operation, bore operation is undertaken by rising slurry program, segmentation minute order is carried out, and first geological drilling rig is moved to liter slurry hole for position, hole, is lowered to geological drilling rig boring, promote up and down drilling tool simultaneously, geological drilling rig creeps into scar or foundation stone ground to designing hole depth position, and arising pipe is lowered to basement rock from a liter slurry hole, thereby completes boring work; Rising slurry aperture, hole is φ 75mm;
(f) boring is cleaned:
1. after liter slurry hole drilling finishes, staff, by arising pipe, adopts high-pressure blast and large water gaging flushing to rise slurry hole, at the bottom of liter slurry hole, hole, outwards washes away the hole wall residues such as rock dust, and backwater clarification continues 5min;
2. crack is rinsed: crack is rinsed according to liter definite purging method of slurry test, and washing pressure is 80% liter of slurry pressure, when pressure surpasses 1MPa, adopts 1MPa, rushes to 10min after backwater clarification and finishes;
(g) rise the front packer permeability test of slurry:
Before rising slurry, packer permeability test adopts simple and easy packer permeability test method, only with rising 80% of slurry pressure, if rise slurry pressure, is greater than 1MPa, setting-out pressure 1MPa, setting-out 20min, every 5min surveys and reads setting-out flow one time, get last flow value calculated flow rate the most, and represent with permeability rate, design formulas is:
q＝Q/PL
Wherein:
Q is setting-out flow (unit: L/min);
P is pressure (units MPa);
L is segment length (m of unit);
Using 10% liter of slurry hole in 25% liter of slurry HeⅡXu hole, hole in I order hole as pilot hole, adopt this simple and easy packer permeability test method number to carry out piecemeal packer permeability test; Constructor obtains packer permeability test result, and submits supervisor, and supervisor, according to the permeability of packer permeability test interpretation of result rock mass, formulates corresponding seepage control measure in conjunction with the permeability of rock mass before liter slurry construction.
(h) set up mixing plant:
Near liter slurry hole, select suitable position to be used for setting up mixing plant, and each Grouting Pipe is connected with mixing plant; Meanwhile, insert 2 feed pipes in mixing plant, 2 feed pipes are respectively used to introduce cement, water; On cement feed pipe and water inlet pipe, flow meter is installed, by flow meter, is controlled the amount of feeding of cement and water; Said structure is interconnected to constitute pulping system.
(i) slurrying:
According to a liter slurry result of the test, obtain the rational water yield, cement amount, admixture amount and additional dosage; By feed pipe, add in mixing plant respectively, adjust flux meter first, regulates the feeding flow of water and cement according to water/binder ratio; Admixture and Admixture adopt weight method to weigh; Before cement charging, first adopt homogenizer to stir, mixing time is no less than 30s, and then introduces in mixing plant; Mud balance is installed in mixing plant, and the every 30min of mud balance measures and once rises serum density, and records for future reference; Slurrying temperature remains on 15～40 ℃, and pulping pressure remains on 0.5～1.2MPa, and mixing time is controlled at 30～48min;
(j) rise slurry hole and rise slurry:
Rising slurry hole, to rise slurry be exactly that qualified risen to slurries by mixing plant, Grouting Pipe, arising pipe, under artesian pressure effect, rising slurries pressure people, holes in foundation stone, is combined into new concrete with bedding.
1. rise slurry: rise slurries and stir and obtain by mixing plant, by the mortar pump in Grouting Pipe, be transported to job site, then inject and rise in slurry hole by arising pipe; The pressure of mortar pump is controlled in 0.1～0.3MPa, when rising slurries, rises to aperture when place, rises and has starched, and slurry can be finished to rise in this hole;
2. rise the observation of slurry slurry face: in rising slurry process, use plummet to observe at any time and rise Starch Level situation of change, rise slurry hole and rise the every 5～10min record of slurry once, special circumstances need timely record.
(k) sealing of hole:
After each liter slurry hole liter slurry finishes, staff notifies supervisor to carry out an acceptance inspection in time, and sealing of hole is carried out in the liter slurry hole of acceptance(check); Adopt fixed liter to starch hole sealing of hole, after reaching design ending standard, by underflow, replace and rise thin pulp in slurry hole, treat that the underflow rear enclosed of return pipe discharge 0.5:1 rises slurry aperture, close slurry sealing of hole.
Owing to adopting technique scheme, there is following beneficial effect:
The present invention is that a kind of boring rises concrete grout construction method, by prefabricated reserved liter slurry hole, and inserts arising pipe in liter slurry hole, arising pipe is connected to Grouting Pipe, Grouting Pipe will rise slurries and directly inject in liter slurry hole, then carry out mud jacking construction, continuous, uninterrupted mud jacking.Without grating stone, carry out ready-mixed concrete; Rise slurries and slowly start upwards from the liter slurry hole of template, therefore the water in coarse aggregate space all can be replaced as and rise slurries during subaqueous construction, more easily produce quality concrete; Without mixer mix aggregate, easy construction, is beneficial to accelerating construction progress; During pumping, only need pump cement mortar, than its pumping technology of ordinary concrete, improve.Meanwhile, this construction method is effective construction cost not only, and without safe mass environmental protection accident, comprehensive energy consumption index further lowers, and sewage, noise, dust emission are up to standard, reach energy-saving and cost-reducing effect.
Prospecting cloth hole contributes to constructor to be familiar with construction location, for completing smoothly construction, has positive impact, can improve constructor's operating efficiency, shortens the construction period.And after prospecting, comparatively ideal is selected in cloth hole site, simplifies work progress.Rise slurry test realization and in advance a liter slurry operation is simulated, by simulation, rise slurry on the one hand and can obtain reasonably rising each component parameter of slurries, obtain and be applicable to the slurries that rise of the present invention; On the other hand, constructor can skilled grasp rise slurry process, effectively avoids liter starching unsuccessfully because human operational error causes; In simulation, rise in slurry process, constructor can find to rise deficiency and the difficult point in slurry scheme, and weak point is made up and corrects, and difficult point part is sought simpler method and substituted or broken through, not only rise slurry operation smooth, and liter slurry effect significantly improves.This construction method passes into arising pipe and Grouting Pipe in liter slurry hole in boring simultaneously, and near construction location, set up mixing plant, realize conveying, batch mixing, slurrying, slip casting integrated process, can connect, continual slip casting, slip casting is convenient, reduce the input of manpower and material resources, significantly accelerating construction progress.Packer permeability test, for measuring the water permeability of rock mass, provides Data support for evaluating permeability and the design seepage control measure of rock mass.Constructor obtains the related data of Permeability of rock according to the result of packer permeability test, and these data is submitted to management and analyze, and management is formulated corresponding seepage control measure according to these data, plays prevention effect in advance, is conducive to lift work.
Accompanying drawing explanation:
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is that a kind of boring of the present invention rises the construction process figure of concrete grout construction method;
Fig. 2 rises the distributed architecture schematic diagram in slurry hole in the present invention;
Fig. 3 is the structural representation of pulping system in the present invention.
Wherein 1 is I order hole, and 2 is II order hole, and 3 is cement storage tank, and 4 is water pot, and 5 is mateiral pump, and 51 is feed pipe, and 6 is mixing plant, and 7 is mortar pump, and 71 is Grouting Pipe.
The specific embodiment
The present invention is that a kind of boring rises concrete grout construction method, and rising slurry engineering is the first link of preventing leaking water engineering, rises the quality of slurry quality, directly has influence on carrying out smoothly of postorder construction works.This construction method is by prefabricated reserved liter slurry hole, and insert arising pipe in liter slurry hole, and arising pipe is connected to Grouting Pipe 71, Grouting Pipe 71 will rise slurries and directly inject in liter slurry hole, then carry out mud jacking construction, realize conveying, batch mixing, slurrying, slip casting integrated process.Without grating stone, carry out ready-mixed concrete; Rise slurries and slowly start upwards from the liter slurry hole of template, therefore the water in coarse aggregate space all can be replaced as and rise slurries during subaqueous construction, more easily produce quality concrete.
Material and plant that this construction method needs are as follows:
1, material: cement, water, Admixture comprise accelerating admixture, water reducing agent and stabilizing agent etc., admixture comprises and mixes sand, cohesive soil, flyash and water glass, pressure hose, fall way, Grouting Pipe 71, feed pipe 51.
2, plant:
Rig: geological drilling rig, drilling rod, high-pressure clear water pump, mateiral pump 5, air compressor, drilling tool, drill bit, feed pipe and valve;
Rise slurry equipment: mortar pump 7, homogenizer, flow meter, pressure meter, liter slurry plug, the automatic slurry recorder that rises.
The constructor of this construction method organizes allotment as follows:
| Work post | Unit | Quantity |
| Boring workman | People/sky | 30 |
| Rise slurry workman | People/sky | 28 |
| Repairman | People/sky | 5 |
| Common laborer | People/sky | 74 |
| White collar worker | People | 10 |
| Management workman | People | 7 |
| Prospecting workman | People | 8 |
| Transportation workman | People | 10 |
The construction sequence of this construction method comprises:
(a) preparation of construction:
1. technology is prepared:
The personnel of organizational technology are familiar with drawing, measure and check the parameters such as figure paper size, engineering quantity, and induction-arrangement is queried; In the meeting of confiding a technological secret by management, design organization, clearly demonstrate, understand design idea, write < < Design of Construction Organization > > and < < job instruction > >, work out each the work items Construction Plan network, report management portion examines; Construction Plan comprises following content:
1, the construction layout plan of boring and liter slurry engineering;
2, the material and facility of boring and liter slurry;
3, program and the technique of boring and liter slurry;
4, quality assurance measure;
5, rise slurry test program;
6, constructor organizes allotment;
7, construction schedule and safety measure etc.
The personnel of organizing construction and technician carry out technical training, please the expert engineer of project management department give lessons, the method synthesis evaluation of taking examination and technician to teach mutually.For undesirable constructor, warned and order it to add study, and arranging secondary examination and technician to teach mutually.Meanwhile, Construction Plan personnel accurately convey to each relevant constructor by Construction Plan, for the difficult point of will putting wherein, do detailed telling about.
2. goods and materials are prepared:
Goods and materials prepare mainly to comprise two of material and facilities, material mainly contains cement, water, Admixture and comprises accelerating admixture, water reducing agent and stabilizing agent etc., admixture comprises and mixes sand, cohesive soil, flyash and water glass, pressure hose, fall way, Grouting Pipe 71, feed pipe 51; Equipment mainly contains rig and rises two kinds of slurry equipment, and rig comprises geological drilling rig, drilling rod, high-pressure clear water pump, mateiral pump 5, air compressor, drilling tool, drill bit, feed pipe and valve; Rise slurry equipment and comprise mortar pump 7, homogenizer, flow meter, pressure meter, liter slurry plug, the automatic slurry recorder that rises;
In above goods and materials, cement is responsible for being supplied to warehouse, project management department building site by owner, and other goods and materials are purchased voluntarily by project management department.According to the detailed MRP table of Construction Plan programming, to have accomplished according to following, and reported the centralized purchasing of goods and materials electromechanics portion, the goods and materials such as cement, Admixture, admixture, pressure meter, flow meter, drill bit, drilling tool are got ready the goods quarterly, and other goods and materials are by stock half a year.
(b) prospecting cloth hole:
1, the siting investigation stage:
First choose several candidates site, prospecting personnel reconnoitre the engineering geology of candidate site, and discussion is analyzed in each candidate site, and contrast mutually, the stability of candidate site and suitability are made to contrast, choose the good candidate site of comprehensive formation as construction site.
2, phase of exploration:
Prospecting construction site, prospecting content comprises:
1. tentatively find out geological structure, earth formation, geotechnical Characteristics;
2. in frozen ground regions, reconnoitre the standard depth of frost penetration of Site Soil;
3. find out the origin cause of formation, distribution of unfavorable geology phenomenon, on the impact of site stability and development trend thereof;
4. seismic fortification intensity is more than or equal to the place of 6 degree, for the earthquake sheet of its site and foundation, does prospecting assessment.
3, cloth hole:
1. lay exploratory hole position, spacing and set up technology hole, in technology hole, get undisturbed soil sample: particular content is as follows:
A, exploratory point are arranged according to building periphery and focus;
When the main stress layer within the scope of b, same building or influential substratum big rise and fall, infill exploration point;
C, substantial equipment are arranged separately exploratory point;
D, exploration means adopt probing to be combined with feeler inspection, and arrange appropriate prospect pit.
2. the degree of depth of exploratory hole, depth of exploration is counted from sole plate;
3. adopt quincuncial arrangement mode, pitch-row is within the scope of 2.1～3.0m, and array pitch is within the scope of 2.8～3.1m, and hole depth is within the scope of 5.3～6.2m;
(c) rise slurry test:
1. slurry test: the slurries that rise that testing crew is drafted Different Water-Cement Ratio, different admixture and different Admixtures according to ground clay distribution situation are tested, admixture comprises and mixes sand, cohesive soil, flyash and water glass etc.; Admixture comprises accelerating admixture, water reducing agent, stabilizing agent, and other Admixtures of supervisor's approval; The mass parts scope that rises each component of slurries of wherein drafting is: water quality part is 30～40, and cement quality part is 65～80, and admixture mass parts is 60～70, and Admixture mass parts is 10～15; The different component of drafting is risen to slurries and carries out respectively the test of following items:
A, rise slurries preparation procedure and mixing time;
B, rise serum density test;
C, rise slurry fluidity or rheological parameter;
D, rise pulp stability;
F, rise the cohesive force of slurries;
G, the unit weight that rises slurries calculus, intensity, modulus of elasticity and permeability;
And obtain respectively corresponding test report, and to submit management portion and examine, management, according to every test report, is tentatively determined and is risen each component parameter of slurries;
Embodiment 1:
Choose and rise each constituent mass part parameter of slurries and be: water quality part is 35, and cement quality part is 75, and admixture mass parts is 60, and Admixture mass parts is 10; After above-mentioned pilot project test, obtain following data:
The indices of embodiment 1 all, in requiring index, meets the requirement of this construction method, can come into operation.
Embodiment 2:
Choose and rise each constituent mass part parameter of slurries and be: water quality part is 35, and cement quality part is 80, and admixture mass parts is 65, and Admixture mass parts is 15; After above-mentioned pilot project test, obtain following data:
The part index number of embodiment 2 is all in requiring index, and because the larger mixing time of cement amount exceeds requirement index, the mobility that rises slurries also exceeds requirement index, does not meet the requirement of this construction method, and need to adjust each group component can come into operation.
Embodiment 3:
Choose and rise each constituent mass part parameter of slurries and be: water quality part is 35, and cement quality part is 70, and admixture mass parts is 65, and Admixture mass parts is 15; After above-mentioned pilot project test, obtain following data:
The part index number of embodiment 3 all, in requiring index, because the water yield rises serum density higher lower than requiring index, rises the intensity of slurries also lower than requiring index, does not meet the requirement of this construction method, and need to adjust each group component can come into operation.
2. rise slurry test: extensive, rise before slurry, carry out rising concrete grout simulated test, first arrange and rise slurry test hole, be divided into two, the long 24m of the direction that parallels to the axis, the long 8m of vertical axis direction, area 192m
2, cover plate concrete thickness is 0.8m; Rise slurry trial zone and select the geological conditions location similar to actual Sheng Jiang district;
In trial zone, arrange and rise slurry position, hole, selected test of formulating rises slurry hole arrangement, hole depth.Rise slurry segmentation, rise slurry pressure and other parameters, construction sequence and the method by developing programs, drafted are tested, and off-test is arranged test hole and checked and rises slurry effect, the test datas such as the unit permeability rate of each order hole of finishing analysis and test hole, unit ash consumption; Then carry out pressure-casting construction, by controlling water/binder ratio, change other because usually guaranteeing Pumping concrete intensity, determine the impact of other factors on concrete strength; Finally write test report, report management portion examines, and management is according to above-mentioned every test report, in conjunction with above-mentioned slurry test report and three groups of embodiment, finally determine and rise each component parameter of slurries: water quality part is 35, and cement quality part is 74, admixture mass parts is 62, and Admixture mass parts is 10;
Adopt respectively diverse ways to rinse crack simultaneously, analyze the pluses and minuses of each method, selected crack purging method.
(d) before boring, prepare:
Built-in slip casting pipe 71: press the spacing built-in slip casting pipe 71 of 2.1～3.0m on the exterior wall of bedding, and check installation site, the grouting port of Grouting Pipe 71 is aimed at the design attitude of corresponding aperture;
Geological drilling rig is in place: first, along toe board face, use i iron to lay light rail, and directly fixedly drilling cramp and geological drilling rig on the light rail of river-bed section, bank slope section is made brill filling chassis fixedly drilling cramp and rig; Then brill is filled with to chassis and move along toe board face, with 2 5t guide chain tractions, with wire rope, be fixed on the anchoring pile of toe board face; Meanwhile, adopt autocrane geological drilling rig is transported to light rail and bores and fill with on chassis, indivedual positions are by artificial dismounting carrying;
(e) boring:
First, bore position is measured setting-out according to design drawing, and unified being numbered, is divided into I order hole 1 and II order hole 2; Then start boring, adopt geological drilling rig to carry out bore operation, bore operation is undertaken by rising slurry program, segmentation minute order is carried out, and first geological drilling rig is moved to liter slurry hole for position, hole, is lowered to geological drilling rig boring, promote up and down drilling tool simultaneously, geological drilling rig creeps into scar or foundation stone ground to designing hole depth position, and arising pipe is lowered to basement rock from a liter slurry hole, thereby completes boring work; Rising slurry aperture, hole is φ 75mm;
(f) boring is cleaned:
1., after liter slurry hole drilling finishes, staff, by arising pipe, adopts high-pressure blast and large water gaging flushing to rise slurry hole, at the bottom of liter slurry hole, hole, outwards washes away the hole wall residues such as rock dust.
Flushing pressure: washing pressure adopts 80% liter slurry pressure, when pressure surpasses 1MPa, adopts 1MPa, rinses blast and adopts 50% liter of slurry pressure, when pressure surpasses 0.5MPa, adopts 0.5MPa.
Rinse to backwater clarification 5min and finish, total washing time requirement, single hole rinses and is no less than 30min, gangs up hole and rinses and be no less than 2h.Backwater is not reached to the hole section of clarification request, proceed to rinse.Until remaining thickness of deposits is no more than 20cm in hole.
2. crack is rinsed: crack is rinsed according to liter definite purging method of slurry test, and washing pressure is 80% liter of slurry pressure, when pressure surpasses 1MPa, adopts 1MPa, rushes to 10min after backwater clarification and finishes;
When having near flushing hole, rise the hole of slurry or close on liter a slurry hole while finishing not enough 24h, must not carry out crack flushing.
After liter slurry porous dehiscence seam has rinsed, a liter slurry operation is carried out in this hole immediately, and in starching if rise, break period, interval surpassed 24h for some reason, should before secondary rises slurry, re-start crack and rinse.
(g) rise the front packer permeability test of slurry:
Before rising slurry, packer permeability test adopts simple and easy packer permeability test method, only with rising 80% of slurry pressure, if rise slurry pressure, is greater than 1MPa, setting-out pressure 1MPa, setting-out 20min, every 5min surveys and reads setting-out flow one time, get last flow value calculated flow rate the most, and represent with permeability rate, design formulas is:
q＝Q/PL
Wherein:
Q is setting-out flow (unit: L/min);
P is pressure (units MPa);
L is segment length (m of unit);
Using 10% liter of slurry hole in 25% liter of slurry HeⅡXu hole, hole 2 in I order hole 1 as pilot hole, adopt this simple and easy packer permeability test method (single-point method or five-spot) number to carry out piecemeal packer permeability test; Constructor obtains packer permeability test result, and submits supervisor, and supervisor, according to the permeability of packer permeability test interpretation of result rock mass, formulates corresponding seepage control measure in conjunction with the permeability of rock mass before liter slurry construction.Packer permeability test force value is selected as following table:
(h) set up mixing plant:
At a liter slurry, select suitable position to be used for setting up mixing plant 6 near hole, pulping equipment is transported to this position, and each Grouting Pipe 71 is communicated with mixing plant 6, therefore, what in mixing plant 6, make rises slurries and can directly be delivered to and liter starch a hole; Meanwhile, at 51,2 feed pipes 51 of 2 feed pipes of the interior insertion of mixing plant 6, be respectively used to introduce cement, water; On cement feed pipe 51 and water feed pipe 51, flow meter is installed, by flow meter, is controlled the amount of feeding of cement and water; Said structure is interconnected to constitute pulping system.
(i) slurrying:
According to a liter slurry result of the test, determine and rise each component parameter of slurries: water quality part is 35, and cement quality part is 74, and admixture mass parts is 62, and Admixture mass parts is 10, and water/binder ratio is 0.47:1; Water and cement add in mixing plant 6 by feed pipe 51 respectively, and the flow meter on adjusting water feed pipe 51 and the flow meter on cement feed pipe 51, according to the feeding flow of water/binder ratio 0.47:1 adjusting water and cement.
Admixture and Admixture adopt weight method to weigh, and admixture adds 62 mass parts, and Admixture adds 10 mass parts; Pulping process is as follows: first adopt homogenizer to stir, mixing time is no less than 30s, then cement feed pipe 51 is introduced in cement storage tank 3, water feed pipe 51 is introduced in water pot 4, open the mateiral pump 5 on feed pipe 51, water and cement enter mixing plant 6, and then constructor pours weighted admixture in mixing plant 6 into, mixing plant 6 slurrying of starting working; The interior installation mud balance of mixing plant 6, the every 30min of mud balance measures and once rises serum density, and records for future reference; Slurrying temperature remains on 15～40 ℃, and pulping pressure remains on 0.5～1.2MPa, and mixing time is controlled at 30～48min.
(j) rise slurry hole and rise slurry:
Rising slurry hole, to rise slurry be exactly that qualified risen to slurries by mixing plant 6, Grouting Pipe 71, arising pipe, under artesian pressure effect, rising slurries pressure people, holes in foundation stone, is combined into new concrete with bedding.
1. rise slurry: rise slurries and stir and obtain by mixing plant 6, by the mortar pump 7 in Grouting Pipe 71, be transported to job site, then inject and rise in slurry hole by arising pipe; The pressure of mortar pump 7 is controlled in 0.1～0.3MPa, when rising slurries, rises to aperture when place, rises and has starched, and slurry can be finished to rise in this hole;
2. rise the observation of slurry slurry face: in rising slurry process, use plummet to observe at any time and rise Starch Level situation of change, rise slurry hole and rise the every 5～10min record of slurry once, special circumstances need timely record.
(k) sealing of hole:
After each liter slurry hole liter slurry finishes, staff notifies supervisor to carry out an acceptance inspection in time, and sealing of hole is carried out in the liter slurry hole of acceptance(check); Adopt fixed liter to starch hole sealing of hole, after reaching design ending standard, by underflow, replace and rise thin pulp in slurry hole, treat that the underflow rear enclosed of return pipe discharge 0.5:1 rises slurry aperture, close slurry sealing of hole.
It is as follows that this construction method rises slurry method of quality control:
1, rise the front inspection of slurry
Before rising slurry, inspection mainly contains: check and rise slurry hole hole count, design hole depth, arising pipe road smoothness and laying reasonability etc.
2, process check
1. check the reasonability of the arrangement of the sequence rise in slurry process and Kong Xu;
2. check and rise slurry temperature and degree of mobilization;
3. guarantee that pore-creating hole depth arrives bedding bottom surface;
4. guarantee that bedding rises slurry construction continuity;
5. check at any time the liter slurry pressure rising in slurry process.If construction is forced to interrupt, at twice necessary high pressure washing in construction bonding surface place, and in the bedding concrete that the heavy people of Grouting Pipe 71 is constructed complete, fully stirs and suspend;
6. use plummet to observe at any time the slurry face rising situation of the adjacent bores in this liter slurry hole, record in time and feed back;
7. the domatic running pulp situation of diver's submarine inspection.
The safety measure of this construction method is as follows:
1, carry out the policy of " Safety first, precaution crucial ", carry out the work of telling somebody what one's real intentions are of safety measure and safety technics.Safety in production, Everybody is responsible.Enter on-the-spot all personnel and all must keep the regulation of legislative control on safety system and the relevant safety management of owner, guarantee site operation safety and personnel health.
2, to being engaged in the constructor of special mechanical operation, carry out security knowledge education, in work progress, want strict implement safety in production rules and regulations, correctly use safety protection facility and protection articles for use.Forbid to violate " safety in production ten is inaccurate ", conscientiously implement < < safety law > >, implement the policy of striking a proper balance between work and rest, strict control worked extra shifts or extra hours.
3, for running into heavy showers or meeting high wind, in the time of cannot normally working, should arrange site plant, prevent the loss of personnel and property.
4, job site wind-force be greater than 6 grades should stop construction.
5, in pumping of concrete operation process, hose end outlet should keep 0.5～1.0m with the face of building, and prevents from burying in people's concrete, causes the interior instantaneous pressure of pipe to increase booster and hurts sb.'s feelings.
6, carry on construction work at night and should guarantee sufficiency of illumination, and set up warning lamp.
These are only specific embodiments of the invention, but technical characterictic of the present invention is not limited to this.Anyly take the present invention as basis, for solving essentially identical technical problem, realize essentially identical technique effect, done ground simple change, be equal to and replace or modification etc., be all covered by among protection scope of the present invention.
Claims (1)
1. boring rises a concrete grout construction method, it is characterized in that comprising the steps:
(a) preparation of construction:
1. technology is prepared:
The personnel of organizational technology are familiar with drawing, measure and check the parameters such as figure paper size, engineering quantity, and induction-arrangement is queried; In the meeting of confiding a technological secret by management, design organization, clearly demonstrate, understand design idea, write < < Design of Construction Organization > > and < < job instruction > >, work out each the work items Construction Plan network, report management portion examines;
2. goods and materials are prepared:
Goods and materials preparation mainly comprises two of material and facilities, and material mainly contains cement, water, Admixture, admixture etc.; Equipment mainly contains rig and rises two kinds of slurry equipment, and rig comprises geological drilling rig, drilling rod, high-pressure clear water pump, air compressor, drilling tool, drill bit, pressure hose, feed pipe and valve etc.; Rise slurry equipment and comprise mortar pump, homogenizer, arising pipe, flow meter, pressure meter, liter slurry plug, the automatic slurry recorder etc. that rises; In above goods and materials, cement is responsible for being supplied to warehouse, project management department building site by owner, and other goods and materials are purchased voluntarily by project management department;
(b) prospecting cloth hole:
First according to construction requirement exploratory hole position, spacing, and set up technology hole, in technology hole, get undisturbed soil sample, make technician grasp foundation soil and distribute, and the projected depth in definite hole; Adopt and drill the exploration means combining with feeler inspection, determine the arrangement in hole; Arrangement principle is: adopt quincuncial arrangement mode, pitch-row is within the scope of 2.1～3.0m, and array pitch is within the scope of 2.8～3.1m;
(c) rise slurry test:
1. slurry test: the slurries that rise that testing crew is drafted Different Water-Cement Ratio, different admixture and different Admixtures according to ground clay distribution situation are tested, admixture comprises and mixes sand, cohesive soil, flyash and water glass etc.; Admixture comprises accelerating admixture, water reducing agent, stabilizing agent, and other Admixtures of supervisor's approval; The mass parts scope that rises each component of slurries of wherein drafting is: water quality part is 30～40, and cement quality part is 65～80, and admixture mass parts is 60～70, and Admixture mass parts is 10～15; The different component of drafting is risen to slurries and carries out respectively the test of following items:
A, rise slurries preparation procedure and mixing time;
B, rise serum density test;
C, rise slurry fluidity and rheological parameter;
D, rise pulp stability;
F, rise the cohesive force of slurries;
G, the unit weight that rises slurries calculus, intensity, modulus of elasticity and permeability;
And obtain respectively corresponding test report, and to submit management portion and examine, management, according to every test report, is tentatively determined and is risen each component parameter of slurries;
2. rise slurry test: extensive, rise before slurry, carry out rising concrete grout simulated test, first arrange and rise slurry test hole, be divided into two, the long 24m of the direction that parallels to the axis, the long 8m of vertical axis direction, area 192m
2, cover plate concrete thickness is 0.8m; Rise slurry trial zone and select the geological conditions location similar to actual Sheng Jiang district; In trial zone, arrange and rise slurry position, hole, selected test of formulating rises slurry hole arrangement, hole depth; Rise slurry segmentation, rise slurry pressure and other parameters, construction sequence and the method by developing programs, drafted are tested, and off-test is arranged test hole and checked and rises slurry effect, the test datas such as the unit permeability rate of each order hole of finishing analysis and test hole, unit ash consumption; Then carry out pressure-casting construction, by controlling water/binder ratio, change other because usually guaranteeing Pumping concrete intensity, determine the impact of other factors on concrete strength; Finally write test report, report management portion examines, and management, according to above-mentioned every test report, is finally determined and risen each component parameter of slurries;
(d) before boring, prepare:
Built-in slip casting pipe: press the spacing built-in slip casting pipe of 2.1～3.0m on the exterior wall of bedding, and check installation site, the grouting port of Grouting Pipe is aimed at the design attitude of corresponding aperture;
Geological drilling rig is in place: first, along toe board face, use i iron to lay light rail, and directly fixedly drilling cramp and geological drilling rig on the light rail of river-bed section, bank slope section is made brill filling chassis fixedly drilling cramp and rig; Then brill is filled with to chassis and move along toe board face, with 2 5t guide chain tractions, with wire rope, be fixed on the anchoring pile of toe board face; Meanwhile, adopt autocrane geological drilling rig is transported to light rail and bores and fill with on chassis, indivedual positions are by artificial dismounting carrying;
(e) boring:
First, bore position is measured setting-out according to design drawing, and unified being numbered, is divided into YuⅡXu hole, I order hole; Then start boring, adopt geological drilling rig to carry out bore operation, bore operation is undertaken by rising slurry program, segmentation minute order is carried out, and first geological drilling rig is moved to liter slurry hole for position, hole, is lowered to geological drilling rig boring, promote up and down drilling tool simultaneously, geological drilling rig creeps into scar and foundation stone ground to designing hole depth position, and arising pipe is lowered to basement rock from a liter slurry hole, thereby completes boring work; Rising slurry aperture, hole is φ 75mm;
(f) boring is cleaned:
1. after liter slurry hole drilling finishes, staff, by arising pipe, adopts high-pressure blast and large water gaging flushing to rise slurry hole, at the bottom of liter slurry hole, hole, outwards washes away the hole wall residues such as rock dust, and backwater clarification continues 5min;
2. crack is rinsed: crack is rinsed according to liter definite purging method of slurry test, and washing pressure is 80% liter of slurry pressure, when pressure surpasses 1MPa, adopts 1MPa, rushes to 10min after backwater clarification and finishes;
(g) rise the front packer permeability test of slurry:
Before rising slurry, packer permeability test adopts simple and easy packer permeability test method, only with rising 80% of slurry pressure, if rise slurry pressure, is greater than 1MPa, setting-out pressure 1MPa, setting-out 20min, every 5min surveys and reads setting-out flow one time, get last flow value calculated flow rate the most, and represent with permeability rate, design formulas is:
q＝Q/PL
Wherein:
Q is setting-out flow (unit: L/min);
P is pressure (units MPa);
L is segment length (m of unit);
Using 10% liter of slurry hole in 25% liter of slurry HeⅡXu hole, hole in I order hole as pilot hole, adopt this simple and easy packer permeability test method number to carry out piecemeal packer permeability test; Constructor obtains packer permeability test result, and submits supervisor, and supervisor, according to the permeability of packer permeability test interpretation of result rock mass, formulates corresponding seepage control measure in conjunction with the permeability of rock mass before liter slurry construction;
(h) set up mixing plant:
Near liter slurry hole, select suitable position to be used for setting up mixing plant, and each Grouting Pipe is connected with mixing plant; Meanwhile, insert 2 feed pipes in mixing plant, 2 feed pipes are respectively used to introduce cement, water; On cement feed pipe and water inlet pipe, flow meter is installed, by flow meter, is controlled the amount of feeding of cement and water; Said structure is interconnected to constitute pulping system;
(i) slurrying:
According to a liter slurry result of the test, obtain the rational water yield, cement amount, admixture amount and additional dosage; By feed pipe, add in mixing plant respectively, adjust flux meter first, regulates the feeding flow of water and cement according to water/binder ratio; Admixture and Admixture adopt weight method to weigh; Before cement charging, first adopt homogenizer to stir, mixing time is no less than 30s, and then introduces in mixing plant; Mud balance is installed in mixing plant, and the every 30min of mud balance measures and once rises serum density, and records for future reference; Slurrying temperature remains on 15～40 ℃, and pulping pressure remains on 0.5～1.2MPa, and mixing time is controlled at 30～
48min；
(j) rise slurry hole and rise slurry:
Rising slurry hole, to rise slurry be exactly that qualified risen to slurries by mixing plant, Grouting Pipe, arising pipe, under artesian pressure effect, rising slurries pressure people, holes in foundation stone, is combined into new concrete with bedding;
1. rise slurry: rise slurries and stir and obtain by mixing plant, by the mortar pump in Grouting Pipe, be transported to job site, then inject and rise in slurry hole by arising pipe; The pressure of mortar pump is controlled in 0.1～0.3MPa, when rising slurries, rises to aperture when place, rises and has starched, and slurry can be finished to rise in this hole;
2. rise the observation of slurry slurry face: in rising slurry process, use plummet to observe at any time and rise Starch Level situation of change, rise slurry hole and rise the every 5～10min record of slurry once, special circumstances need timely record;
(k) sealing of hole:
After each liter slurry hole liter slurry finishes, staff notifies supervisor to carry out an acceptance inspection in time, and sealing of hole is carried out in the liter slurry hole of acceptance(check); Adopt fixed liter to starch hole sealing of hole, after reaching design ending standard, by underflow, replace and rise thin pulp in slurry hole, treat that the underflow rear enclosed of return pipe discharge 0.5:1 rises slurry aperture, close slurry sealing of hole.
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| CN115059049A (en) * | 2022-06-28 | 2022-09-16 | 中交第三航务工程局有限公司 | Application of quick-drying cement in frozen soil grouting and grouting method containing application |
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Address after: Green Ting Road Yuhang District Cang Qian street of Hangzhou city Zhejiang province 310000 No. 1 Building 1 room 171 Patentee after: Hangzhou Huaneng engineering safety Polytron Technologies Inc Address before: In the city 310000 Hangzhou Road, Zhejiang province No. 108 room 1706 Patentee before: HANGZHOU HUANENG DAM SAFETY ENGINEERING TECHNOLOGY CO., LTD. |