CN109778842A - Bored pile construction method - Google Patents
Bored pile construction method Download PDFInfo
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- CN109778842A CN109778842A CN201910041591.XA CN201910041591A CN109778842A CN 109778842 A CN109778842 A CN 109778842A CN 201910041591 A CN201910041591 A CN 201910041591A CN 109778842 A CN109778842 A CN 109778842A
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- reinforcement cage
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Abstract
The present invention relates to the technical fields of pile foundation construction, more particularly, to a kind of bored pile construction method.A kind of bored pile construction method, comprising: S1. place cleaning；S2. rigging up；S3. mud is made to spud in；S4. borehole cleaning: S5. makes reinforcement cage skeleton；S6., reinforcement cage skeleton is installed；Reinforcement cage skeleton is hung in stake holes using crane, reinforcement cage skeleton sectional making, is abutted across reinforcement cage skeleton with casing after a complete section with steel cylinder under every and carry out maintenance, then hung another section with crane and carry out docking；After prefabricated concrete pad is installed on the outside of reinforcement cage skeleton, hangs reinforcement cage skeleton and enter in stake holes；S7. watertight test is carried out to conduit；S8. conduit is lifted；S9. high pressure water is perfused；S10. subaqueous concreting.In the outside of steel reinforcement cage, setting concrete pad makes between steel reinforcement cage and the side wall of stake holes there are certain spacing, and there are the spacing of at least one concrete pad for the outer surface of reinforcing bar and bored concrete pile after forming pile is perfused, so that reinforcing bar is not easy to be rusted.
Description
Technical field
The present invention relates to the technical fields of pile foundation construction, more particularly, to a kind of bored pile construction method.
Background technique
Cast-in-situ bored pile, which refers to, drills out stake holes using drilling machine, and steel reinforcement cage is first hung in hole, and pours in hole mixed
Stake made of solidifying soil, since without friction, without squeezing soil when having construction, noise is small, is suitable for using in City Building dense region
The advantages that, and have been more and more widely used.
Existing Authorization Notice No. is that the patent of invention of CN103924584B discloses a kind of construction party of cast-in-situ bored pile
Method.But the construction method has the following problems: steel reinforcement cage is easy bias during placing cause to be easy after forming pile is perfused
There is part reinforcing steel bars exposed or too small with the spacing of concrete lateral wall, this reinforcing bar that will lead to part is easily rusted and influences to fill
Infuse the integral strength of stake.
Summary of the invention
The object of the present invention is to provide a kind of bored pile construction methods, its advantage lies in being able to easily control reinforcing bar
The position of cage.
Foregoing invention purpose of the invention has the technical scheme that a kind of bored pile construction side
Method, comprising:
S1. place cleaning；
S2. rigging up；
S3. mud is made to spud in；
S4. borehole cleaning:
S5. reinforcement cage skeleton is made；
S6., reinforcement cage skeleton is installed；
Reinforcement cage skeleton is hung in stake holes using crane, reinforcement cage skeleton sectional making, is passed through after a complete section with steel cylinder under every
Reinforcement cage skeleton is abutted with casing carries out maintenance, then hangs another section with crane and carry out docking；It is installed on the outside of reinforcement cage skeleton
After prefabricated concrete pad, hangs reinforcement cage skeleton and enter in stake holes；
S7. watertight test is carried out to conduit；
S8. conduit is lifted；
S9. high pressure water is perfused；
S10. subaqueous concreting.
By using above-mentioned technical proposal, when installing steel reinforcement cage in the work progress of cast-in-situ bored pile, by reinforcing bar
The outside setting concrete pad of cage makes between steel reinforcement cage and the side wall of stake holes that steel after forming pile is perfused there are certain spacing
There are the spacing of at least one concrete pad for the outer surface of muscle and bored concrete pile, so that reinforcing bar is not easy to be rusted.
The present invention is further arranged to: in step S3, a certain number of clays and corresponding water, drilling machine are put into stake holes
Drilling depth does not dally, and stirs mud processed using drill bit, is evacuated to circulatory pool after stirring；After pond to be recycled and stake holes all store up enough mud, bore
Ruler is crept into machine at a slow speed, and the mud in circulatory pool is injected into stake holes by pump machine simultaneously.
By using above-mentioned technical proposal, by drill bit, drilling depth idle running does not drive stirring clay and water that mud is made.System
Enter caching in circulatory pool after standby a large amount of mud, then injection mud forms mud protection on stake holes wall when drilling
Layer.
The present invention is further arranged to: when drilling machine starts drilling depth, ruler is crept into drilling machine at a slow speed, and subject-oriented part fully enters ground
After layer, it can creep at full speed.
By using above-mentioned technical proposal, drilling machine starts slowly to creep into, so that drilling direction is accurate.It is complete in targeting part
It is crept at full speed after piercing, accelerates speed of application.
The present invention is further arranged to: in drilling process, often fishing for boring mud, the variation for observing stratum adjusts mud in time
The consistency of slurry changes revolving speed.
By using above-mentioned technical proposal, since different geological stratifications is needed using the mortar of different consistency and using not
Same revolving speed, it is therefore desirable to which observation boring mud is in real time to carry out adaptability adjusting.
The present invention is further arranged to: in step S5, first being formulated muscle of putting more energy into accordingly, is then arranged main reinforcement, set every 2m
Main reinforcement is welded on by regulation spacing after arranging and is put more energy on muscle, then according to regulation by vertical muscle of putting more energy into together, muscle underlay sleeper of putting more energy into
Spacing freeze stirrup.
By using above-mentioned technical proposal, during assembly welding, bolster wood is below muscle of putting more energy into avoid muscle of putting more energy into
After welding main reinforcement due to pressure increase and between the stone of ground squeeze deformation occurs.
The present invention is further arranged to: the concrete pad side forms the installation matched with concrete pad
Slot, the both ends perforation of mounting groove, the width of mounting groove are equal to the diameter of reinforcing bar, and the depth of mounting groove is less than the diameter of reinforcing bar and big
In the radius of reinforcing bar, the side that concrete pad is provided with mounting groove is embedded with two steel wires for being located at mounting groove two sides, steel
One end of silk is exposed.
By using above-mentioned technical proposal, matched by mounting groove with reinforcing bar, it is next by coagulation by two forming from steel wire
The position of native cushion block is fixed.
The present invention is further arranged to: every phase forms one of limit across a certain distance in the two opposite side walls of the mounting groove
Position slot, the spacing of adjacent limiting slot are equal to the rib spacing of reinforcing bar.
By using above-mentioned technical proposal, by limiting slot and reinforcing rib cooperation limitation concrete pad along reinforcing bar direction
Movement.
The present invention is further arranged to: in step S7, examination is spelled before conduit lifting, according to the overall length of stake holes, determines conduit
Assembled length；Conduit watertight test is carried out, hydraulic pressure when test is greater than 1.5 times of shaft bottom hydraulic pressure, when conduit passes through watertight test
It just can be used after qualification.
By using above-mentioned technical proposal, it is used further to construct after carrying out the waterproof test that 1.5 times of hydraulic pressure obtain to conduit, makes
The case where accidental release will not be occurred in use by obtaining conduit.
The present invention is further arranged to: in step S9, being connected funnel in conduit upper end, after storing up sufficient concrete in funnel case, is cut
The disconnected iron wire for hanging sandbag, falls concrete；Before concrete whereabouts finishes in funnel, continue to put concrete connecting, is entered for the first time with increasing
Concrete quantity in stake holes；Concrete drops down onto rapidly bottom hole and conduit is wrapped, so that conduit has the buried depth of 2m or more.
By using above-mentioned technical proposal, increase the concrete quantity entered in stake holes for the first time, so that concrete drops down onto rapidly bottom hole
And conduit is wrapped with the depth of 2m or more.
The present invention is further arranged to: in filling process, perfusion should be carried out continuously, and slowly promoted and led in perfusion
Pipe, it is slower than the concrete rate of climb that conduit promotes speed；First funnel is moved away when promoting conduit, then vertical-lift conduit, removes
Funnel is connected again after the one section guide rail of the top, continues that concrete is perfused；When concrete pouring is within stake top 5m, is no longer promoted and led
Pipe, slowly extracts conduit after being perfused to regulation absolute altitude.
By using above-mentioned technical proposal, conduit promotion speed is slower than the concrete rate of climb, makes concrete often in flowing shape
State, be conducive to concrete is uniformly mixed into type.No longer promote conduit when being perfused within last 5m, avoid by conduit propose concrete face and
Perfusion is caused to interrupt.
In conclusion advantageous effects of the invention are as follows:
1. setting concrete pad between steel reinforcement cage and the side wall of stake holes to fill there are certain spacing in the outside of steel reinforcement cage
There are the spacing of at least one concrete pad for the outer surface of reinforcing bar and bored concrete pile after infusing forming pile, so that reinforcing bar is not easy to be become rusty
Erosion；
2. using being used further to construct after the preceding waterproof test for obtaining conduit 1.5 times of hydraulic pressure of progress, so that conduit will not use
Occurs the case where accidental release in the process.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of concrete pad in embodiment.
Appended drawing reference: 1, concrete pad；2, mounting groove；3, limiting slot；4, steel wire.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
A kind of bored pile construction method, comprising:
S1. place cleaning；
Mud is removed in place within the scope of smooth pile foundation, nearby takes soil or aggregate chips to fill out whole.Embedded diameter is bigger than stake diameter by 15~
The steel pile casting of 20cm.After casing sinks, periphery is tamped with clay backfilling.Casing will check an axis when sinking, guarantee in casing
The heart is consistent with stake axis, casing upper end 30cm above ground level.
S2. rigging up；
It is in place to make base rigging up with sleeper, to make pedestal and top steady.After drilling machine is in place, borer chassis is adjusted to water
Level state, when drill bit, which hangs in casing, to be started to bore lower first brill, Ying little Xin makes cone be directed at design centre, then covers sealing
Plate.
S3. mud is made to spud in；
When spudding in, a certain number of clays and corresponding water are put into stake holes, drilling depth does not dally drilling machine, stirs mud processed using drill bit
Slurry, is evacuated to circulatory pool after stirring.The relative density of mud is 1.05~1.20, behind pond to be recycled and the enough mud of stake holes whole storage,
Ruler is crept into drilling machine at a slow speed, after subject-oriented part fully enters stratum, can be crept at full speed.It simultaneously will be in circulatory pool by pump machine
Mud is injected into stake holes.
In drilling process, boring mud is often fished for, the variation for observing stratum adjusts the consistency of mud in time, it is determined whether increases
Add deduct few revolving speed.In the small mud stone of cohesive soil and sand factor, preferably use moderate rotation thin mud (relative density be 1.05~
1.20) drilling；In the high stratum of sandy soil and sand factor, preferably with low turn, (relative density is for pump amount, thickened drilling fluid at a slow speed, greatly
1.20~1.45) it creeps into.The high earth-boring of sand factor is easier the hole that collapses, it is therefore desirable to use the biggish mud shape of relative density
At thicker mortar retaining wall, to play better protection effect.
The variation on stratum is kept a close eye on when drilling construction, when hole depth has reached designed elevation, but the bearing capacity of core is not yet
It when reaching design requirement, then continues to drill, changes the whole hole absolute altitude in the hole.
S4. borehole cleaning:
After the completion of stake holes, continue to rotate after lifting burr-drill about 20cm, then with the lower mud indentation of relative density, in stake holes
It floats outstanding boring mud and the biggish mud of relative density to swap out, until shifting to the relative density of mud in hole lower than 1.2.It is arranged in borehole cleaning
When slag, head in retaining hole prevents the hole that collapses.
S5. reinforcement cage skeleton is made；
Muscle of putting more energy into accordingly is first formulated, then arranges main reinforcement, sets up muscle of putting more energy into together, muscle underlay sleeper of putting more energy into, row every 2m
Main reinforcement is welded on by regulation spacing after column are good and is put more energy on muscle, then is freezed stirrup according to defined spacing.
S6., reinforcement cage skeleton is installed；
Reinforcement cage skeleton is hung in stake holes using crane, reinforcement cage skeleton sectional making, is passed through after a complete section with steel cylinder under every
Reinforcement cage skeleton is abutted with casing carries out maintenance, then hangs another section with crane and carry out docking, and docking is welded using arc welding between section
It connects, the fusion length of single welding is not less than 10d, and welding by both sides is not less than 5d.Prefabricated concrete is installed on the outside of reinforcement cage skeleton
After cushion block 1, hangs reinforcement cage skeleton and enter in stake holes.
As shown in Figure 1, prefabricated 1 side of concrete pad forms the mounting groove 2 matched with concrete pad 1, peace
The both ends of tankage 2 penetrate through, and the width of mounting groove 2 is equal to the diameter of reinforcing bar, and the depth of mounting groove 2 is less than the diameter of reinforcing bar and is greater than
The radius of reinforcing bar.Every phase forms one of limiting slot 3 across a certain distance in the two opposite side walls of mounting groove 2, adjacent limiting slot 3
Spacing is equal to the rib spacing of reinforcing bar.The side that concrete pad 1 is provided with mounting groove 2 is embedded with two and is located at 2 liang of mounting groove
The steel wire 4 of side, one end of steel wire 4 are exposed.By 1 set of concrete pad on reinforcing bar, reinforcing rib is caught in after limiting slot 3 by tightening
Two steel wires 4 fix the position of concrete pad 1.
S7. watertight test is carried out to conduit；
Examination is spelled before conduit lifting, according to the overall length of stake holes, determines the assembled length of conduit.Conduit watertight test is carried out, when test
Hydraulic pressure be greater than 1.5 times of shaft bottom hydraulic pressure, just can be used after conduit is qualified by watertight test.
S8. conduit is lifted；
Conduit is lifted to well head central location, and carries out lifting test before perfusion.
S9. high pressure water is perfused；
Conduit, which is hung, to be finished, and seals up the iron plate with pipe in conduit mouth, in conduit plus is filled high pressure water, is made the sediment for being deposited in bottom hole
It drifts about.
S10. subaqueous concreting；
Funnel is connected in conduit upper end, after storing up sufficient concrete in funnel case, the iron wire for hanging sandbag is cut, falls concrete.In funnel
Before interior concrete whereabouts finishes, continue to put concrete connecting, to increase the concrete quantity entered in stake holes for the first time.Concrete drops down onto rapidly bottom hole and handle
Conduit wraps, so that conduit has the buried depth of 2m or more.
In filling process, perfusion should be carried out continuously, and conduit is slowly promoted in perfusion, and conduit promotes speed than concrete
The rate of climb is slow, makes concrete often in flow regime.First funnel is moved away when promoting conduit, then vertical-lift conduit, removes
Funnel is connected again after the one section guide rail of the top, continues that concrete is perfused.When concrete pouring is within stake top 5m, is no longer promoted and led
Pipe, slowly extracts conduit after being perfused to regulation absolute altitude.
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 (10)
1. a kind of bored pile construction method, characterized in that include:
S1. place cleaning；
S2. rigging up；
S3. mud is made to spud in；
S4. borehole cleaning:
S5. reinforcement cage skeleton is made；
S6., reinforcement cage skeleton is installed；
Reinforcement cage skeleton is hung in stake holes using crane, reinforcement cage skeleton sectional making, is passed through after a complete section with steel cylinder under every
Reinforcement cage skeleton is abutted with casing carries out maintenance, then hangs another section with crane and carry out docking；It is installed on the outside of reinforcement cage skeleton
After prefabricated concrete pad (1), hangs reinforcement cage skeleton and enter in stake holes；
S7. watertight test is carried out to conduit；
S8. conduit is lifted；
S9. high pressure water is perfused；
S10. subaqueous concreting.
2. bored pile construction method according to claim 1, it is characterized in that: putting into one in stake holes in step S3
The clay of fixed number amount and corresponding water, drilling depth does not dally drilling machine, stirs mud processed using drill bit, is evacuated to circulatory pool after stirring；Wait follow
After cisterna ambiens and stake holes all store up enough mud, ruler is crept into drilling machine at a slow speed, and the mud in circulatory pool is injected into stake holes by pump machine simultaneously.
3. bored pile construction method according to claim 2, it is characterized in that: drilling machine is at a slow speed when drilling machine starts drilling depth
Ruler drilling, after subject-oriented part fully enters stratum, can creep at full speed.
4. bored pile construction method according to claim 3, it is characterized in that: often fishing for brill in drilling process
Slag, the variation for observing stratum adjust the consistency of mud in time, change revolving speed.
5. bored pile construction method according to claim 1, it is characterized in that: first formulating corresponding add in step S5
Strength muscle, then arranges main reinforcement, sets up muscle of putting more energy into together, muscle underlay sleeper of putting more energy into, by main reinforcement by regulation after arranging every 2m
Spacing, which is welded on, puts more energy on muscle, then freezes stirrup according to defined spacing.
6. bored pile construction method according to claim 1, it is characterized in that: the concrete pad (1) side at
Type has the mounting groove (2) matched with concrete pad (1), the both ends perforation of mounting groove (2), and the width of mounting groove (2) is equal to
The diameter of reinforcing bar, the depth of mounting groove (2) are less than the diameter of reinforcing bar and are greater than the radius of reinforcing bar, and concrete pad (1) is provided with peace
The side of tankage (2) is embedded with two steel wires (4) for being located at mounting groove (2) two sides, and one end of steel wire (4) is exposed.
7. bored pile construction method according to claim 6, it is characterized in that: the two opposite sides of the mounting groove (2)
Every phase forms one of limiting slot (3) across a certain distance on wall, and the spacing of adjacent limiting slot (3) is equal to the rib spacing of reinforcing bar.
8. bored pile construction method according to claim 1, it is characterized in that: examination is spelled before conduit lifting in step S7,
According to the overall length of stake holes, the assembled length of conduit is determined；Conduit watertight test is carried out, hydraulic pressure when test is greater than shaft bottom hydraulic pressure
1.5 times, when conduit after watertight test qualification by just can be used.
9. bored pile construction method according to claim 1, it is characterized in that: being connected in step S9 in conduit upper end
Funnel cuts the iron wire for hanging sandbag, falls concrete after storing up sufficient concrete in funnel case；Before concrete whereabouts finishes in funnel, continue
It puts concrete to connect, to increase the concrete quantity entered for the first time in stake holes；Concrete drops down onto rapidly bottom hole and conduit is wrapped, so that conduit has
The buried depth of 2m or more.
10. bored pile construction method according to claim 9, it is characterized in that: perfusion should be continuous in filling process
It carries out, and slowly promotes conduit in perfusion, it is slower than the concrete rate of climb that conduit promotes speed；First funnel is moved when promoting conduit
It opens, then vertical-lift conduit, connects funnel again after removing a section guide rail of the top, continue that concrete is perfused；Concrete pouring is to distance
When within stake top 5m, conduit is no longer promoted, slowly extracts conduit after being perfused to regulation absolute altitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041591.XA CN109778842A (en) | 2019-01-16 | 2019-01-16 | Bored pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910041591.XA CN109778842A (en) | 2019-01-16 | 2019-01-16 | Bored pile construction method |
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| Publication Number | Publication Date |
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| CN109778842A true CN109778842A (en) | 2019-05-21 |
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ID=66500790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910041591.XA Pending CN109778842A (en) | 2019-01-16 | 2019-01-16 | Bored pile construction method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615001A (en) * | 2013-11-27 | 2014-03-05 | 宁波盛宏建设工程有限公司 | Bored pile construction method for reinforcing cage framework layered installation |
| CN203977884U (en) * | 2014-06-26 | 2014-12-03 | 中国建筑第七工程局有限公司 | A kind of steel reinforcement protective sleeve pipe |
| CN207348320U (en) * | 2017-10-17 | 2018-05-11 | 云南建投第二建设有限公司 | A kind of construction concrete cover cushion block |
-
2019
- 2019-01-16 CN CN201910041591.XA patent/CN109778842A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615001A (en) * | 2013-11-27 | 2014-03-05 | 宁波盛宏建设工程有限公司 | Bored pile construction method for reinforcing cage framework layered installation |
| CN203977884U (en) * | 2014-06-26 | 2014-12-03 | 中国建筑第七工程局有限公司 | A kind of steel reinforcement protective sleeve pipe |
| CN207348320U (en) * | 2017-10-17 | 2018-05-11 | 云南建投第二建设有限公司 | A kind of construction concrete cover cushion block |
Non-Patent Citations (1)
| Title |
|---|
| 于辉等: "《结构设计原理》", 31 August 2014, 北京理工大学出版社 * |
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Application publication date: 20190521 |