CN104947655A - Construction technology and equipment for cement mixing pile - Google Patents
Construction technology and equipment for cement mixing pile Download PDFInfo
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- CN104947655A CN104947655A CN201510243370.2A CN201510243370A CN104947655A CN 104947655 A CN104947655 A CN 104947655A CN 201510243370 A CN201510243370 A CN 201510243370A CN 104947655 A CN104947655 A CN 104947655A
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Abstract
The invention discloses a construction technology and equipment for a cement mixing pile. The construction technology comprises the steps that when the hollow pile section is constructed, clear water is ejected from a grout ejecting opening, the clear water is also ejected by the grout ejecting opening in the first sinking process of the solid pile section, a mixing head is lifted and sunk for many times in the lifting process of the solid pile section, and cement grout is ejected from the grout ejecting opening. According to the construction technology for the cement mixing pile, the cement is distributed in the solid pile section uniformly, and the cement grout is combined with soil body in the solid pile section, so that the pile forming quality of the solid pile section is guaranteed, waste of the cement grout is avoided, and follow-up digging work of the hollow pile section is convenient.
Description
Technical field
The present invention relates to the construction technology of cement mixing pile, and the equipment that construction cement mixing pile is used.
Background technology
Adopting cement mixing pile to carry out basement process is coastal area, Pearl River Delta, method for processing foundation that Yangtze River Delta Area soft foundation is conventional.At present, the job site of cement mixing pile only arranges a set of cement grout induction system, in cement mixing pile in construction process, cement grout induction system from agitator from land subsidence to completing in single pile work progress, omnidistance whitewashing.Due to the existence of the ground bottom pressure at mouth spray place, overhead darker, ground bottom pressure is larger, therefore along with the sinking of agitator, the spray pressure difference of slurry delivery system will be more and more less, causes from ground, and more down the whitewashing amount of unit length pile cutoff is fewer, whitewashing amount is fewer, and its pile quality is also poorer.Thus, the cement mixing pile that above-mentioned construction method is formed, it is best at the empty pile cutoff pile quality of the top, and the pile quality of entity pile cutoff is poor on the contrary.There is following defect in the construction technology of above-mentioned cement mixing pile: 1, part cement grout is injected in empty stake soil layer, and cause entity pile cutoff whitewashing quantity not sufficient, pile quality is poor; Meanwhile, the cement grout be injected in sky pile cutoff also result in waste.2, be injected in cement grout and the soil consolidation of empty stake soil layer, change the physical property of empty stake soil layer, increase the intensity of empty stake soil layer, thus increase the difficulty of follow-up soil layer excavation.
Summary of the invention
The present invention is intended to overcome above-mentioned prior art defect, provides a kind of cement mixing pile constructing process and the construction equipment that can ensure entity pile cutoff pile quality.
A kind of cement mixing pile constructing process of the present invention, comprises the step of following order:
A, empty pile cutoff construction sequence
Stirring-head is bottom land subsidence to empty pile cutoff, and in this process, limit is stirred, mouth spray limit spray clear water;
B, entity section construction sequence
Stirring-head continues by sinking, and is sunk until close to bottom entity pile cutoff by entity pile cutoff top, and this process limit is stirred mouth spray and become spray clear water;
Stirring-head stops certain hour, while stirring spraying cement slurries in entity pile cutoff bottom;
Upper and lower repeated multiple times lifting and sinking stirring-head in entity pile cutoff, until stirring-head is finally positioned at the top of entity pile cutoff, mouth spray limit spraying cement slurries are stirred on limit in the process;
C, stirring-head extract step
Carry stirring-head on being continued by entity pile cutoff top, be promoted to ground through empty pile cutoff, spray clear water while stirring in the process.
Cement mixing pile construction method of the present invention, it is in empty pile cutoff work progress, mouth spray sprays clear water and not jet cement slurries, stirring-head is extracted in step, be similarly through empty pile cutoff and spray clear water but not cement grout, thus, it both can soften soil layer, be convenient to soil layer disturbance, make the smooth sinking of agitation pile and extract, the waste of cement grout can be avoided again; Meanwhile, almost do not have cement grout, there is not the situation of cement grout and soil consolidation, can not increase the intensity of empty pile cutoff in the empty pile cutoff after its pile, in contrary construction, the water of ejection can also reduce the soil layer intensity of empty pile cutoff, is more conducive to the excavation of follow-up soil layer.And, in the work progress of entity section, have employed sinking watching water spray first, put forward the mode with sinking watching spraying cement slurries while stirring on follow-up, start bottom its cement grout entity pile cutoff to spray, the overflow of cement grout when can avoid stirring-head is carried, prevent cement grout overflow to empty pile cutoff, the utilization rate of further raising cement grout, avoids waste, also better prevents cement and soil consolidation in sky pile cutoff simultaneously.In addition, stirring-head, when arriving entity pile cutoff bottom first, keeps bottom position spraying cement slurries a period of time while stirring, well can also ensure that the pile quality of entity pile cutoff bottom, make the bottom pile crown of entity pile cutoff have higher intensity, thus the bearing capacity of composite foundation can be improved.In addition, cement mixing pile construction method of the present invention, its cement grout course of injection is within the scope of entity pile cutoff all the time, there is not the waste of cement grout, effectively improve the utilization rate of cement grout, meanwhile, in its entity pile cutoff work progress, stirring-head is first through spraying water while stirring, softened stake position soil layer, reduced the pressure reduction that entity pile cutoff is upper and lower, the pressure differential change that entity pile cutoff upper-lower position is whitewashed is less, whitewashing evenly, overall pile quality is also better.
Cement mixing pile construction equipment of the present invention, comprise slush pump, cement paste liquid pool and clear water reserviors, cement paste liquid pool and clear water reserviors are respectively by respective pipeline communication slush pump inlet duct, be communicated with valve slush pump inlet duct being respectively arranged with and controlling pipeline opening and closing separately at cement paste liquid pool and clear water reserviors, slurries delivery side of pump is then connected to a machine by pipeline.
Cement mixing pile construction equipment of the present invention, its slush pump respectively by different pipeline communication cement paste liquid pools and clear water reserviors; By controlling the opening and closing of each pipeline valve, can respectively to stake machine conveying slurries and clear water.When the empty pile cutoff of cement mixing pile of constructing, the valve on the valve on clear water reserviors pipeline, closedown cement paste liquid pool pipeline can be opened, in stake machine, supply clear water by slush pump; And when constructing entity pile cutoff, first can control clear water reserviors pipeline opens, cement paste liquid pool closedown of pipeline, until the stirring-head of stake machine is close to bottom entity pile cutoff, the opening and closing situation of switch valve, makes clear water reserviors closedown of pipeline, and cement paste liquid pool pipeline is opened.The mouth spray arriving stirring-head from valve due to cement grout needs regular hour T1, therefore should control the switching time of valve to arrive previous time T1 bottom entity pile cutoff at stirring-head, when stirring-head can be made like this to arrive bottom entity pile cutoff, mouth spray switches to jet cement slurries just.In entity pile cutoff work progress afterwards, promote up and down at stirring-head and in the subsequent process that sinks, keep cement grout pipeline to open, and clear water slurry pipe line closed; Until the complete front time T2 of entity pile cutoff construction, switch valve opening and closing situation, time T2 is after valve open-close state switches, clear water flows to the time of mouth spray from valve, complete in the construction of entity pile cutoff like this, upper body stirring-head is through empty pile cutoff, and stirring-head is in the process through empty pile cutoff, and mouth spray can spray clear water.Visible, described cement mixing pile construction equipment, its slush pump is optionally to stake machine conveying clear water or cement grout, by the demand that well can adapt to cement mixing pile constructing process of the present invention on conveying opportunity and time controlling clear water and cement grout, complete the construction of cement mixing pile very easily.
Accompanying drawing explanation
Fig. 1 is cement mixing pile constructing process step schematic diagram of the present invention.
Fig. 2 is that the present invention narrates cement mixing pile construction equipment schematic diagram.
Detailed description of the invention
As shown in Figure 1, Figure 2, a kind of construction equipment of cement mixing pile, comprise slush pump 1, cement paste liquid pool 2 and clear water reserviors 3, cement paste liquid pool and clear water reserviors are respectively by respective pipeline communication slush pump inlet duct 6, be communicated with the valve 4,5 slush pump inlet duct being respectively arranged with and controlling pipeline opening and closing separately at cement paste liquid pool and clear water reserviors, slurries delivery side of pump is then connected to a machine by pipeline.
By selecting the opening and closing of valve 4, valve 5, controlled slurrying liquid pump 1 is communicated with cement paste liquid pool 2 or is communicated with clear water reserviors 3, thus carries different liquid to stake machine, meets the needs of cement mixing pile driving construction.
When valve 4 open, valve 5 close time, inlet duct 6 and cement paste liquid pool 2 conducting of slush pump, start slush pump, can to stake machine conveying cement grout.
When valve 4 close, valve 5 open time, inlet duct 6 and clear water reserviors 3 conducting of slush pump, start slush pump, can to stake machine conveying clear water.
In the inlet duct of slush pump, flowmeter 7 can be installed, the injection rate of cement grout can be monitored and measure by flowmeter, thus control the construction of cement mixing pile better.
Can setting pressure table 8 at the outlet conduit of slush pump, in order to monitor spray pressure.
As follows with above-mentioned construction equipment construction cement mixing pile:
Open valve 5, valve-off 4, start slush pump, by clarified water pump to the mouth spray of stake machine; Stirring-head from land subsidence until bottom empty pile cutoff 10, spray water while stirring; Stirring-head continues to sink, and is sunk until bottom entity pile cutoff by entity pile cutoff 20 top, and this process mouth spray is sprayed water; Close to bottom entity stake for the previous period, be good with 30 seconds, switch valve, opens valve 4, valve-off 5, and when stirring-head is arrived bottom entity stake, mouth spray sprays cement grout just; Stirring-head stays for some time in bottom, while stirring spraying cement glue, and cement grout is combined with soil layer; Then, above carry stirring-head, spraying cement slurries while stirring in the process of upper body; Until on mention entity pile cutoff top, then sink agitation pile again, maintains spraying cement slurries while stirring, until again sink to bottom; And then on mention entity pile cutoff top, spraying cement slurries while stirring; Outreaching for the previous period, switch valve, opening valve 5, valve-off 4, when making stirring-head rise to entity pile cutoff top, mouth spray starts to spray clear water just; Afterwards, stirring-head is carried in continuation, through empty pile cutoff, above carry in process and spray clear water while stirring, until propose from empty pile cutoff top.
Claims (5)
1. a cement mixing pile constructing process, is characterized in that: the step comprising following order:
A, empty pile cutoff construction sequence
Stirring-head is bottom land subsidence to empty pile cutoff, and in this process, limit is stirred, mouth spray limit spray clear water;
B, entity section construction sequence
Stirring-head continues by sinking, and is sunk until close to bottom entity pile cutoff by entity pile cutoff top, and this process limit is stirred mouth spray and become spray clear water;
Stirring-head stops certain hour, while stirring spraying cement slurries in entity pile cutoff bottom;
Upper and lower repeated multiple times lifting and sinking stirring-head in entity pile cutoff, until stirring-head is finally positioned at the top of entity pile cutoff, mouth spray limit spraying cement slurries are stirred on limit in the process;
C, stirring-head extract step
Carry stirring-head on being continued by entity pile cutoff top, be promoted to ground through empty pile cutoff, spray clear water while stirring in the process.
2. a cement mixing pile construction equipment, it is characterized in that: comprise slush pump, cement paste liquid pool and clear water reserviors, cement paste liquid pool and clear water reserviors are respectively by respective pipeline communication slush pump inlet duct, be communicated with valve slush pump inlet duct being respectively arranged with and controlling pipeline opening and closing separately at cement paste liquid pool and clear water reserviors, slurries delivery side of pump is then connected to a machine by pipeline.
3. cement mixing pile construction equipment according to claim 2, is characterized in that: be provided with flowmeter in the inlet duct of slush pump.
4. cement mixing pile construction equipment according to claim 2, is characterized in that: be provided with pressure meter at the outlet conduit of slush pump.
5. use the cement mixing pile construction equipment described in claim 2 to carry out the technique of cement mixing pile driving construction, it is characterized in that: comprise the steps:
By switch valve, control clear water reserviors and be communicated with slush pump inlet duct, startup slush pump, by clarified water pump to the mouth spray of stake machine; Stirring-head from land subsidence until bottom empty pile cutoff, spray water while stirring; Stirring-head continues to sink, and is sunk until bottom entity pile cutoff by entity pile cutoff top, and this process mouth spray is sprayed water; Close to bottom entity stake for the previous period, switch valve, makes cement paste liquid pool be communicated with slush pump inlet duct, and when stirring-head is arrived bottom entity stake, mouth spray sprays cement grout just; Stirring-head stays for some time in bottom, while stirring spraying cement glue, and cement grout is combined with soil layer; Then, above carry stirring-head, spraying cement slurries while stirring in the process of upper body; Until on mention entity pile cutoff top, then sink agitation pile again, maintains spraying cement slurries while stirring, until again sink to bottom; And then on mention entity pile cutoff top, spraying cement slurries while stirring; Outreaching for the previous period, switch valve again, clear water reserviors are communicated with slush pump inlet duct, and when making stirring-head rise to entity pile cutoff top, mouth spray starts to spray clear water just; Afterwards, stirring-head is carried in continuation, through empty pile cutoff, above carry in process and spray clear water while stirring, until propose from empty pile cutoff top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243370.2A CN104947655A (en) | 2015-05-14 | 2015-05-14 | Construction technology and equipment for cement mixing pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243370.2A CN104947655A (en) | 2015-05-14 | 2015-05-14 | Construction technology and equipment for cement mixing pile |
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| CN104947655A true CN104947655A (en) | 2015-09-30 |
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| CN201510243370.2A Pending CN104947655A (en) | 2015-05-14 | 2015-05-14 | Construction technology and equipment for cement mixing pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368214A (en) * | 2016-11-17 | 2017-02-01 | 安徽理工大学 | Pile forming operation method for protection barrel type cement soil mixing pile |
| CN107939296A (en) * | 2017-12-26 | 2018-04-20 | 上海广大基础工程有限公司 | A kind of changeable drilling tool of mouth spray |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368214A (en) * | 2016-11-17 | 2017-02-01 | 安徽理工大学 | Pile forming operation method for protection barrel type cement soil mixing pile |
| CN106368214B (en) * | 2016-11-17 | 2019-07-26 | 安徽理工大学 | A kind of casing formula cement mixing method at pile operation method |
| CN107939296A (en) * | 2017-12-26 | 2018-04-20 | 上海广大基础工程有限公司 | A kind of changeable drilling tool of mouth spray |
| CN107939296B (en) * | 2017-12-26 | 2023-08-04 | 上海广大基础工程有限公司 | Drilling tool with switchable spraying opening |
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Application publication date: 20150930 |