CN104120716A - Slurry wall protection construction method for bored pile - Google Patents
Slurry wall protection construction method for bored pile Download PDFInfo
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- CN104120716A CN104120716A CN201310154457.3A CN201310154457A CN104120716A CN 104120716 A CN104120716 A CN 104120716A CN 201310154457 A CN201310154457 A CN 201310154457A CN 104120716 A CN104120716 A CN 104120716A
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Abstract
The invention discloses a slurry wall protection construction method for a bored pile. The slurry wall protection construction method includes the following steps that step 1, a pile hole is positioned; step 2, a pile casing is buried; step 3, a drilling machine is in place; step 4, qualified slurry is prepared; step 5, hole forming and hole clearing are performed; step 6, a steel reinforcement cage is lifted for placing; step 7, underwater concrete is cast. According to the slurry wall protection construction method for the bored pile, operation is easy, the problems that the pile hole deviates, and pile body concrete is mixed with slurry are solved, and the construction method is suitable for slurry wall protection hole forming bored pile engineering of soft and hard soil layers high in underground water level in industrial and civil buildings.
Description
Technical field
The present invention relates to a kind of holing with slurry wall protection cast-in-place pile construction method, belong to technical field of building construction.
Background technology
Castinplace pile system refers at engineering site and in foundation soil, forms stake hole by means such as machine drilling, steel pipe soil compaction or manpower excavations, and place reinforcing cage, concrete perfusion therein and the stake of making, according to hole forming method difference, castinplace pile can be divided into again several classes such as tube-sinking cast-in-situ pile, bored pile and digging hole filling pile.Bored pile is a kind of stake type of definition by piling method classification.
The construction of bored pile, because of the difference that its selected retaining wall forms, has two kinds of mud off construction method and full-sleeve construction methods, and existing holing with slurry wall protection filling pile construction exists the easy shortcoming that produces stake hole deflection and concrete piles folder mud.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, a kind of holing with slurry wall protection cast-in-place pile construction method is provided, this technological operation is simple, the problem that has solved stake hole deflection and concrete piles folder mud, is applicable to high soft, the hardpan mud off pore-creating filling pile engineering of groundwater table in industry and civilian construction.
Technical scheme: a kind of holing with slurry wall protection cast-in-place pile construction method of the present invention, comprises the steps:
(1) stake hole location: before construction, according to the axis of stake, draw the cross centre line of each position, center line is with tingle stickfast near timber stake hole, and pile position deviation is controlled in 10mm, and stake is buried underground and is firmly had eye-catching mark;
(2) casing is buried underground: the position of casing is buried underground accurately and be stable, between casing and hole wall, tamp with clay, casing plasma discharge mouth communicates with mud ditch, casing center line is not more than 50mm with stake bit line deviation, casing 1.0 meters of buried depths in cohesive soil, casing 100～200mm above ground level suitable for reading, exempts from mud face for wall and fluctuates, wash away hole wall and draw and cause the hole that collapses, more than retaining hole entoplasm face exceeds groundwater table 1.0m;
(3) rig is in place: rig maintenance balance in place, and in the time creeping into operation, not run-off the straight displacement, measure drilling rod verticality at both direction with transit in advance, drilling rod perpendicularity deviation is controlled in 0.2%, and drill bit is accurate to hole, and bit central and casing deviation are less than 15mm;
(4) prepare qualified mud: the clay of index of plasticity Ip≤17 for mud materials, tap water, the pH value of water body is 7～9, add appropriate swell soil, dispersing agent and tackifier stir and form, and mud circulating system arranges circulatory pool, pulp storage tank and sedimentation basin, and it is arranged by the unearthed amount of three times and calculates;
(5) pore-forming and clear hole: in boring procedure, the 5 meters of left and right of often advancing, measure the verticality of a hole wall, until absolute altitude at the bottom of design hole, often hole depth, aperture, vertical degree of the peg hole are checked, guarantee to meet design requirement, carry out hole clearly,, want mud face in retaining hole not reduce when in clear the hole, prevent shrinkage cavity, collapse hole, after reinforcing cage hand-hole and catheter placement, before filling concrete, to using premium mud secondary pile hole cleaning at the bottom of hole, make sediment drift about overflow, pour into front hole at the bottom of sediment thickness be less than 100mm;
(6) reinforcing cage hangs: reinforcing cage preliminary election is made moulding by design drawing, for ensureing that reinforcing cage is in transport, in hoisting process, do not deform, with spiral or welding ring u stirrup u, add reinforcement stirrup one every 2 meters, and pointwise and main muscle weld, the protective layer used precast concrete roundel of reinforcing bar is enclosed within to be strengthened on hoop dish, both can prevent from transferring reinforcing bar collision hole wall, work again the steel bar cage protecting layer effect of controlling, reinforcing cage sling and vertical righting after, slowly transfer along guiding steel pipe, must not collide hole wall, after pore-forming, lay as early as possible reinforcing cage, at the bottom of reducing hole, back-silt, end face and bottom surface absolute altitude meet designing requirement, be less than ± 50mm of error,
(7) cast underwater concrete: before pouring concrete, sediment thickness at the bottom of repetition measurement hole, tremie collocation and assembling need be calculated in advance according to hole depth, determine that reasonably collocation is beneficial to the dismounting of mixed pouring and conduit, conduit is suitable for reading to be directly connected with concrete storage bin hopper end opening, and higher than 3 meters, mud face, storage bin hopper inner concrete storage capacity must meet cuts plug requirement, while perfusion first, tremie bottom is as the criterion with 0.8～1.2 meter of Transducers Embedded in Concrete, concrete is answered continuous pouring, forbid to stop work midway, in filling process, survey the lifting height of concrete surface through conventional plummet, and conduit is dismantled in lifting in good time step by step, strictly control the minimum depth of conduit according to actual conditions, to ensure the continuous uniform of pile concrete, the rate of climb of filling concrete is more than or equal to 2m/h.
Further improve technique scheme, described step (two) casing application tool formula steel casing, adopts abrasion drill, and internal diameter is than the large 100mm of bit diameter, and top is opened height and established 1～2 slurry hole of overflowing.
Further improve technique scheme, described step (five) is selected mud direct circulation and anti-round-robin method operation according to concrete engineering situation, and dissimilar soil layer adopts different drill bits.
Further, while creeping into through cohesive soil, mud and mucky soil and sand, select fishtail bit or cage type bit; Through not thick sand folder cobble or in the time that decayed rock layer creeps into, select the cage type bit of seting welding carbide cutter head.
Further, when described step (seven) is kept a grip on underground concrete, infusion time is controlled at the concrete imbedded in conduit not in time of lost flowability, adds if desired appropriate retarding agent.
The present invention compared with prior art, its beneficial effect is: holing with slurry wall protection cast-in-place pile construction method of the present invention, simple to operate, the problem that has solved stake hole deflection and concrete piles folder mud, is applicable to high soft, the hardpan mud off pore-creating filling pile engineering of groundwater table in industry and civilian construction.
Detailed description of the invention
Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
embodiment 1:a kind of holing with slurry wall protection cast-in-place pile construction method, comprises the steps:
(1) stake hole location: before construction, according to the axis of stake, draw the cross centre line of each position, center line is with tingle stickfast near timber stake hole, and pile position deviation is controlled in 10mm, and stake is buried underground and is firmly had eye-catching mark;
(2) casing is buried underground: the position of casing is buried underground accurately and be stable, between casing and hole wall, tamp with clay, casing plasma discharge mouth communicates with mud ditch, casing center line is not more than 50mm with stake bit line deviation, casing 1.0 meters of buried depths in cohesive soil, casing 100～200mm above ground level suitable for reading, exempts from mud face for wall and fluctuates, wash away hole wall and draw and cause the hole that collapses, more than retaining hole entoplasm face exceeds groundwater table 1.0m;
(3) rig is in place: rig maintenance balance in place, and in the time creeping into operation, not run-off the straight displacement, measure drilling rod verticality at both direction with transit in advance, drilling rod perpendicularity deviation is controlled in 0.2%, and drill bit is accurate to hole, and bit central and casing deviation are less than 15mm;
(4) prepare qualified mud: the clay of index of plasticity Ip≤17 for mud materials, tap water, the pH value of water body is 7～9, add appropriate swell soil, dispersing agent and tackifier stir and form, and mud circulating system arranges circulatory pool, pulp storage tank and sedimentation basin, and it is arranged by the unearthed amount of three times and calculates;
(5) pore-forming and clear hole: in boring procedure, the 5 meters of left and right of often advancing, measure the verticality of a hole wall, until absolute altitude at the bottom of design hole, often hole depth, aperture, vertical degree of the peg hole are checked, guarantee to meet design requirement, carry out hole clearly,, want mud face in retaining hole not reduce when in clear the hole, prevent shrinkage cavity, collapse hole, after reinforcing cage hand-hole and catheter placement, before filling concrete, to using premium mud secondary pile hole cleaning at the bottom of hole, make sediment drift about overflow, pour into front hole at the bottom of sediment thickness be less than 100mm;
(6) reinforcing cage hangs: reinforcing cage preliminary election is made moulding by design drawing, for ensureing that reinforcing cage is in transport, in hoisting process, do not deform, with spiral or welding ring u stirrup u, add reinforcement stirrup one every 2 meters, and pointwise and main muscle weld, the protective layer used precast concrete roundel of reinforcing bar is enclosed within to be strengthened on hoop dish, both can prevent from transferring reinforcing bar collision hole wall, work again the steel bar cage protecting layer effect of controlling, reinforcing cage sling and vertical righting after, slowly transfer along guiding steel pipe, must not collide hole wall, after pore-forming, lay as early as possible reinforcing cage, at the bottom of reducing hole, back-silt, end face and bottom surface absolute altitude meet designing requirement, be less than ± 50mm of error,
(7) cast underwater concrete: before pouring concrete, sediment thickness at the bottom of repetition measurement hole, tremie collocation and assembling need be calculated in advance according to hole depth, determine that reasonably collocation is beneficial to the dismounting of mixed pouring and conduit, conduit is suitable for reading to be directly connected with concrete storage bin hopper end opening, and higher than 3 meters, mud face, storage bin hopper inner concrete storage capacity must meet cuts plug requirement, while perfusion first, tremie bottom is as the criterion with 0.8～1.2 meter of Transducers Embedded in Concrete, concrete is answered continuous pouring, forbid to stop work midway, in filling process, survey the lifting height of concrete surface through conventional plummet, and conduit is dismantled in lifting in good time step by step, strictly control the minimum depth of conduit according to actual conditions, to ensure the continuous uniform of pile concrete, the rate of climb of filling concrete is more than or equal to 2m/h.
When Specific construction:
Described (two) casing application tool formula steel casing, adopts abrasion drill, and internal diameter is than the large 100mm of bit diameter, and top is opened height and established 1～2 slurry hole of overflowing.
Described step (five) is selected mud direct circulation and anti-round-robin method operation according to concrete engineering situation, and dissimilar soil layer adopts different drill bits.While creeping into through cohesive soil, mud and mucky soil and sand, select fishtail bit or cage type bit; Through not thick sand folder cobble or in the time that decayed rock layer creeps into, select the cage type bit of seting welding carbide cutter head.
When described step (seven) is kept a grip on underground concrete, infusion time is controlled at the concrete imbedded in conduit not in time of lost flowability, adds if desired appropriate retarding agent.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Not departing under the spirit and scope of the present invention prerequisite of claims definition, can make in the form and details various variations to it.
Claims (5)
1. a holing with slurry wall protection cast-in-place pile construction method, is characterized in that, comprises the steps:
(1) stake hole location: before construction, according to the axis of stake, draw the cross centre line of each position, center line is with tingle stickfast near timber stake hole, and pile position deviation is controlled in 10mm, and stake is buried underground and is firmly had eye-catching mark;
(2) casing is buried underground: the position of casing is buried underground accurately and be stable, between casing and hole wall, tamp with clay, casing plasma discharge mouth communicates with mud ditch, casing center line is less than 40mm with stake bit line deviation, casing 1.0 meters of buried depths in cohesive soil, casing 100～200mm above ground level suitable for reading, exempts from mud face for wall and fluctuates, wash away hole wall and draw and cause the hole that collapses, more than retaining hole entoplasm face exceeds groundwater table 1.0m;
(3) rig is in place: rig maintenance balance in place, and in the time creeping into operation, not run-off the straight displacement, first measure drilling rod verticality at both direction with transit, drilling rod perpendicularity deviation is controlled in 0.2%, and drill bit is accurate to hole, and bit central and casing deviation are less than 15mm;
(4) prepare qualified mud: the clay of index of plasticity Ip≤17 for mud materials, the pH value of water body is 7～9, adds swell soil, and dispersing agent and tackifier stir and form, and mud circulating system is provided with circulatory pool, pulp storage tank and sedimentation basin;
(5) pore-forming and clear hole: in boring procedure, the 5 meters of left and right of often advancing, the verticality of a hole wall of measurement, until absolute altitude at the bottom of design hole, guarantee to meet design requirement, carry out hole clearly,, want mud face in retaining hole not reduce when in clear the hole, prevent shrinkage cavity, collapse hole, after reinforcing cage hand-hole and catheter placement, before filling concrete, to using premium mud secondary pile hole cleaning at the bottom of hole, make sediment drift about overflow, pour into front hole at the bottom of sediment thickness be less than 100mm;
(6) reinforcing cage hangs: reinforcing cage preliminary election is made moulding by design drawing, welding ring u stirrup u, adds reinforcement stirrup one every 2 meters, and pointwise and main muscle weld, the protective layer used precast concrete roundel of reinforcing bar is enclosed within to be strengthened on hoop dish, reinforcing cage sling and vertical righting after, slowly transfer along guiding steel pipe, must not collide hole wall, after pore-forming, lay as early as possible reinforcing cage, at the bottom of reducing hole, back-silt, end face and bottom surface absolute altitude meet designing requirement, be less than ± 50mm of error;
(7) cast underwater concrete: before pouring concrete, sediment thickness at the bottom of repetition measurement hole, tremie collocation and assembling, conduit is suitable for reading to be directly connected with concrete storage bin hopper end opening, and higher than 3 meters, mud face, storage bin hopper inner concrete storage capacity must meet cuts plug requirement, while perfusion first, tremie bottom is with 0.8～1.2 meter of Transducers Embedded in Concrete, concrete is answered continuous pouring, forbid to stop work midway, in filling process, survey the lifting height of concrete surface through conventional plummet, and conduit is dismantled in lifting in good time step by step, strictly control the minimum depth of conduit according to actual conditions, to ensure the continuous uniform of pile concrete, the rate of climb of filling concrete is more than or equal to 2m/h.
2. holing with slurry wall protection cast-in-place pile construction method according to claim 1, is characterized in that, described step (two) casing application tool formula steel casing adopts abrasion drill, and internal diameter is than the large 100mm of bit diameter, and top is opened height and established 1～2 slurry hole of overflowing.
3. holing with slurry wall protection cast-in-place pile construction method according to claim 1, is characterized in that, described step (five) is selected mud direct circulation and anti-round-robin method operation according to concrete engineering situation, and dissimilar soil layer adopts different drill bits.
4. holing with slurry wall protection cast-in-place pile construction method according to claim 3, is characterized in that, while creeping into, selects fishtail bit or cage type bit through cohesive soil, mud and mucky soil and sand; Through not thick sand folder cobble or in the time that decayed rock layer creeps into, select the cage type bit of seting welding carbide cutter head.
5. holing with slurry wall protection cast-in-place pile construction method according to claim 3, it is characterized in that, when described step (seven) is built underground concrete, infusion time is controlled at the concrete imbedded in conduit not in time of lost flowability, and must add retarding agent.
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| CN104747088A (en) * | 2015-03-31 | 2015-07-01 | 浙江禹建建设集团有限公司 | Single-waist multi-leaf hose bit for bored pile and drilling construction method thereof |
| CN104831708A (en) * | 2015-03-20 | 2015-08-12 | 深圳市工勘岩土集团有限公司 | Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof |
| CN104895054A (en) * | 2015-04-23 | 2015-09-09 | 侨健新能源科技（苏州）有限公司 | Construction method of fiber rib concrete uplift pile |
| CN105239562A (en) * | 2015-09-25 | 2016-01-13 | 黄国庆 | Hole-forming pouring pile |
| CN105568961A (en) * | 2015-12-28 | 2016-05-11 | 中国电建集团贵阳勘测设计研究院有限公司 | Hole forming method for soft plastic red clay stratum pile foundations |
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| CN105839619A (en) * | 2016-06-14 | 2016-08-10 | 江苏燕宁建设工程有限公司 | Construction method for drilling pile under bad geological conditions |
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| CN108894214A (en) * | 2018-08-27 | 2018-11-27 | 孙德明 | A kind of solution cavity geological environment bored concrete pile and its bore forming method |
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| CN110258540A (en) * | 2019-06-25 | 2019-09-20 | 安徽皖宏建筑工程有限公司 | A kind of construction method of cast-in-situ bored pile |
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| CN104831708A (en) * | 2015-03-20 | 2015-08-12 | 深圳市工勘岩土集团有限公司 | Foundation excavation retaining and protecting cast-in-situ bored pile construction method and equipment thereof |
| CN104747088A (en) * | 2015-03-31 | 2015-07-01 | 浙江禹建建设集团有限公司 | Single-waist multi-leaf hose bit for bored pile and drilling construction method thereof |
| CN104895054A (en) * | 2015-04-23 | 2015-09-09 | 侨健新能源科技（苏州）有限公司 | Construction method of fiber rib concrete uplift pile |
| CN105239562A (en) * | 2015-09-25 | 2016-01-13 | 黄国庆 | Hole-forming pouring pile |
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| CN108894214A (en) * | 2018-08-27 | 2018-11-27 | 孙德明 | A kind of solution cavity geological environment bored concrete pile and its bore forming method |
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| CN113914308A (en) * | 2021-09-28 | 2022-01-11 | 深圳市桥梁维修设备科技有限公司 | Construction method combining forward circulation and reverse circulation of cast-in-situ bored pile |
| CN114703831A (en) * | 2022-04-20 | 2022-07-05 | 山西四建集团有限公司 | Construction method of reinforced concrete cast-in-place pile under complex geological condition |
| CN115030146A (en) * | 2022-06-15 | 2022-09-09 | 曾国海 | Solidified soil composite foundation technology for pile mud capable of being solidified in situ to form pile body material |
| CN115012403A (en) * | 2022-06-27 | 2022-09-06 | 中煤长江基础建设有限公司 | Hole wall treatment device and method for cast-in-place pile |
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Application publication date: 20141029 |