CN102900079A - High-frequency hydraulic vibratory construction method for cement-soil core-inserted combined pile - Google Patents
High-frequency hydraulic vibratory construction method for cement-soil core-inserted combined pile Download PDFInfo
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Abstract
The invention provides a high-frequency hydraulic vibratory construction method for a cement-soil core-inserted combined pile. The high-frequency hydraulic vibratory construction method is a foundation reinforcing method, and includes forming a hole in a soil squeezing mode by a traditional immersed tube or drilling a hole by long spiral equipment, and filling stirred cement-soil mixtures into the drilled hole to for a pile; or directly forming a cement-soil pile by a stirring pile machine, immersing a rigid core pile into the uncured cement-soil pile by a high-frequency hydraulic vibratory hammer after cement-soil forms the pile, and forming the novel pile comprising the cement-soil pile and the core pile which jointly bear load. Compared with the prior art, the high-frequency hydraulic vibratory construction method has the advantages that the construction speed is high, the noise and the manufacturing cost are low, pollution is prevented, the quality of the formed novel pile is stable, and the formed novel pile is high in load bearing capacity. Besides, the construction efficiency is ten times of that of a common piling machine, the cost is saved by about 30% to 50% as compared with a precast pile, and is saved by about 40% to 50% as compared with a drilled grouting pile, and the high-frequency hydraulic vibratory construction method has substantial social and economical benefits.
Description
Technical field
The present invention relates to the foundation reinforcement method in the construction work, specifically, relate to the shake foundation reinforcement method of cement slotting compound pile of a kind of high frequency liquid.
Background technology
The type of stake commonly used mainly is divided into preformed pile and castinplace pile two large classes according to the difference of job practices in the at present construction work, often adopts the stake types such as bored pile, tube-sinking cast-in-situ pile and preformed pile.
Bored pile generally adopts the mud off pore-forming, placing of concrete technology under water, and its construction exists that speed of application is slow, contaminated environment and high cost shortcoming.
Tube-sinking cast-in-situ pile utilizes impact pile driving equipment or pile vibrosinking equipment, to sink to (diameter of steel tube should be consistent with the design size of stake) in the soil with the pile top (or steel plate boots) of steel concrete or with the steel pipe of valve type pile shoe, cause the technology in a hole.It has advantages of that speed of application is fast, cost is low, but tube-sinking cast-in-situ pile easily produces constriction, broken pile, the local quality problems such as upper and strength deficiency of pressing from both sides.
Precast reinforced concrete piles is a kind of maximum type of domestic use, and main employing is the prestress thin wall pile tube in recent years.Preformed pile has the advantages such as reliable in quality, speed of application is fast, cost is relatively low, but it belongs to Squeezing Soil Pile, can produce extruding and then affect neighboring buildings, underground pipeline the soil body inevitably in pile driving process.
Publication number is that the Chinese patent application of CN1259604A discloses a kind of reinforcement compound pile construction that the stake core is inserted cement earth pile, in uncured cement-soil pile body, utilize first casing to squeeze out a core hole, then take out casing, in stake core hole, proceed the construction of a core.Although the cement earth pile with respect to simple that this cement-soil that has added the stake core is strengthened compound pile increases at bearing capacity, but this job practices need to utilize first the casing extruding to form stake core hole, then just can proceed the construction process such as embedded pile core steel core, concreting, tamping, maintenance stake core after taking out casing, the construction technology that it is loaded down with trivial details is so that the claim for eot of construction, productivity slowdown, and the noise of construction is large, cost is high.
So, be necessary foundation reinforcement method is further improved, to avoid the defective that above-mentioned construction technology is loaded down with trivial details, speed of application is slow, cost is high and noise is large.
Summary of the invention
The present invention makes in order to solve the problem that exists in the above-mentioned existing foundation reinforcement method, and its purpose is to propose a kind of foundation reinforcement method that utilizes the cement slotting compound pile that high frequency liquid shakes.
The high frequency liquid provided by the invention cement slotting compound pile construction that shakes comprises:
The cement earth pile construction;
Behind cement piling, solidify before, utilize the dither of high-frequency hydraulic hammer that prefabricated stiffness core stake is sunk in the described uncured cement soil pile;
After the precalculated position forms the cement slotting compound pile in described uncured cement soil pile is sunk in the stake of described stiffness core, the described cement slotting compound pile of maintenance.
In addition, preferably, after the cement earth pile in described cement slotting compound pile solidifies, the stake of described stiffness core and the common bearing load of described cement earth pile.
In addition, preferably, described cement earth pile is cement mixing method or powder spray piling or high-pressure rotary jet grouting pile.
In addition, preferably, described core stake is concrete precast pile or precast reinforced concrete piles or steel pipe pile or shaped steel.
In addition, preferably, described core stake is high strength, the stake of high-modulus core.
High-frequency hydraulic hammer provided by the invention inserts the combined cement earth pile foundation reinforcement method of core stake, make cement earth pile and two kinds of complementary materials of core stake common bearing load that is integrated by high-frequency hydraulic hammer, give full play to the side friction of cement earth pile and the cross-sectional strength of strength core stake, thereby obtained to be higher than the on year-on-year basis bearing capacity of concrete pile with the cost that is lower than concrete pile.The problems such as this invention has overcome simultaneously that the pile sinking noise is large, soil compaction problem and contaminated environment have also overcome cement mixing method and have stirred uneven, the unsettled problem of quality.Therefore the present invention have that speed of application is fast, noise is little, pollution-free, cost is low, steady quality and bearing capacity highland advantage.
Description of drawings
By below in conjunction with accompanying drawing embodiment being described, above-mentioned feature of the present invention and technological merit will become apparent and easily understand.
Fig. 1 is the shake construction schematic diagram of cement slotting compound pile of the high frequency liquid according to the embodiment of the invention;
Fig. 2 is the structural representation sketch according to the cement slotting compound pile of the embodiment of the invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done further detailed description.
In the following description, only the mode by explanation is described some example embodiment of the present invention, undoubtedly, those of ordinary skill in the art can recognize, in the situation that without departing from the spirit and scope of the present invention, can revise described embodiment with various different modes.Therefore, accompanying drawing and be described in just illustratively in essence rather than is used for the protection domain of restriction claim.In addition, in this manual, identical Reference numeral indicates identical part.
Fig. 1 is the shake construction schematic diagram of cement slotting compound pile of the high frequency liquid according to the embodiment of the invention.
As shown in Figure 1, in the work progress of cement slotting compound pile, behind selected reinforcing pile construction stake position, the position that needs ground stabilization to process, at first need to carry out cement pile construction (step S120), then behind cement piling, solidify before, utilize the dither of high-frequency hydraulic hammer that uncured cement soil pile interior (step S140) is sunk in prefabricated stiffness core stake; Sink to after the precalculated position forms the cement slotting compound pile in the uncured cement soil pile at last this cement slotting compound pile (step S160) of maintenance in prefabricated stiffness core stake.
Wherein, the work progress of cement earth pile can adopt the boring of traditional immersed tube soil compaction pore-forming or long spiral equipment, behind the pore-forming with the cement-soil mixture injection hole pile through stirring; Also can use mixing pile machine and directly form cement earth pile; Perhaps adopt other this areas piling method commonly used.Cement earth pile can be cement mixing method, powder spray piling or high-pressure rotary jet grouting pile.
Behind cement piling, solidify before, just prefabricated stiffness core stake can be sunk in the uncured cement earth pile.Because the purpose of lock pin combination pile of the present invention is in order to simplify construction technology on the basis of improving pile body bearing capacity, to improve efficiency of construction, therefore, in the work progress of cement slotting compound pile of the present invention, the lock pin that adopts is prefabricated stiffness core stake, the strength and modulus of this stiffness core stake all is higher than the strength and modulus of cement earth pile, like this, cement earth pile and the stake of stiffness core homogeneous type of the common compound pile structure that forms and tradition different, the load that can bear also produces great variety thereupon.
The cement slotting compound pile of this combining structure provided by the present invention can pass to the load on pile body top first the larger stiffness core stake of intensity, the stake of stiffness core further passes to cement-soil by the active force between cement earth pile and the stake of stiffness core again with load, at last load is spread to foundation soil.Owing to all can cut down to some extent when load is transmitted between the supporter of varying strength, therefore, by cement slotting compound pile of the present invention, load is to transmit with the form that intensity dies down gradually, thereby has greatly improved the ability of the bearing load of this cement slotting compound pile.
Because it is the low pile body structure of intensity around the intermediate intensity height that this combined concrete stake has, so combined cement earth pile can be given full play to the performance advantage of cement earth pile and core stake assembly.
The stake of stiffness core can be the stake of the high strength such as concrete precast pile, precast reinforced concrete piles, steel pipe pile or shaped steel, high-modulus.Utilize the weight of core stake itself, can be so that high strength, the stake of high-modulus core be slowly sunk in uncured cement earth pile.But in order to improve efficiency of construction, and effectively control its subsidence position, adopt in the present invention the dither of high-frequency hydraulic hammer to help the core stake to sink in the uncured cement earth pile, and control it and sink down into default position.After solidifying, cement earth pile just can form so the new stake type of a kind of cement earth pile and the common bearing load of stiffness core stake.
Fig. 2 is the structural representation sketch according to the cement slotting compound pile of the embodiment of the invention.
As shown in Figure 2, after construction was finished, stiffness core stake 220 was wrapped in the cement earth pile 240, progressively decomposed the load of bearing.
Utilize high-frequency hydraulic hammer with the collaborative work that is integrated of the material of cement earth pile and two kinds of wood property complementations of stiffness core stake, can give full play to the side grinding resistance of cement earth pile and the cross-sectional strength of stiffness core stake, thereby and obtain to be equal to the bearing capacity of concrete pile with the cost that is lower than concrete pile.The application of simultaneously high-frequency hydraulic vibration has also overcome noise and the soil compaction problem of traditional driven pile, and bored pile mud contamination problem.Simultaneously, the effect of vibrating of high-frequency hydraulic hammer also can overcome inhomogeneous, the unsettled defective of quality of cement mixing method stirring.
By the construction verification of reality, the cement slotting compound pile construction that this high frequency liquid provided by the present invention shakes has advantages of easy construction, speed is fast, noise is low, pollution-free, steady quality, cost is low, bearing capacity of foundation soil is high and be out of shape little.Through construction data test comparison, the efficiency of construction of the combined cement earth pile construction of this high-frequency hydraulic hammer insertion of the present invention core stake is 10 times of common piling machinery, expense saves 30%～50% than preformed pile, save 40%～50% than bored pile, considerable economic results in society are arranged, and this construction is low, the free of contamination environment-friendly type construction technology of a kind of noise.
Need to prove, high-frequency hydraulic hammer inserts the combined cement earth pile of core stake and develops on the cement earth pile basis, applied range, as long as the engineering of applicable cement earth pile (cement mixing method, powder spray piling, high-pressure rotary jet grouting pile etc.) can adopt, also can be widely used in the soft soil roadbed processing.
Under above-mentioned instruction of the present invention; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment; and these improvement and distortion; all drop in protection scope of the present invention; those skilled in the art should be understood that; above-mentioned specific descriptions are just explained purpose of the present invention better, and protection scope of the present invention is limited by claim and equivalent thereof.
Claims (7)
1. high frequency liquid cement slotting compound pile construction that shakes comprises:
The cement earth pile construction;
Behind cement piling, solidify before, utilize the dither of high-frequency hydraulic hammer that prefabricated stiffness core stake is sunk in the described uncured cement soil pile;
After the precalculated position forms the cement slotting compound pile in described uncured cement soil pile is sunk in the stake of described stiffness core, the described cement slotting compound pile of maintenance.
2. the high frequency liquid as claimed in claim 1 cement slotting compound pile construction that shakes, after the cement earth pile in described cement slotting compound pile solidifies, the stake of described stiffness core and the common bearing load of described cement earth pile.
3. according to the high frequency liquid claimed in claim 1 cement slotting compound pile construction that shakes, it is characterized in that,
Described cement earth pile is cement mixing method, powder spray piling or high-pressure rotary jet grouting pile.
4. according to the high frequency liquid claimed in claim 1 cement slotting compound pile construction that shakes, it is characterized in that,
The stake of described stiffness core is concrete precast pile, precast reinforced concrete piles, steel pipe pile or shaped steel.
5. according to the high frequency liquid claimed in claim 1 cement slotting compound pile construction that shakes, it is characterized in that,
The strength and modulus of described stiffness core stake is greater than the strength and modulus of described cement earth pile.
6. the high frequency liquid claimed in claim 1 cement slotting compound pile construction that shakes is characterized in that, comprises in the process of described cement earth pile construction:
The method that adopts immersed tube soil compaction pore-forming or long spiral equipment to hole forms the fill orifice of described cement earth pile;
Behind the pore-forming cement-soil mixture through stirring is injected described fill orifice.
7. the high frequency liquid claimed in claim 1 cement slotting compound pile construction that shakes is characterized in that, in the process of described cement earth pile construction, uses mixing pile machine and directly forms described cement earth pile.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161151A (en) * | 2013-04-02 | 2013-06-19 | 中国水电顾问集团中南勘测设计研究院 | Construction method of high pressure jet grouting hollow strengthening tubular pile and high pressure jet grouting hollow strengthening tubular pile |
| CN103758127A (en) * | 2013-12-25 | 2014-04-30 | 深圳市鼎邦工程有限公司 | Tubular pile construction method applicable to penetrating hard layer |
| CN104153388A (en) * | 2014-08-22 | 2014-11-19 | 中国建筑西南勘察设计研究院有限公司 | Composite foundation and construction method thereof |
| CN104153357A (en) * | 2014-08-26 | 2014-11-19 | 骆嘉成 | Construction method of composite pile |
| CN104404947A (en) * | 2014-11-20 | 2015-03-11 | 张红 | Construction method for composite pile |
| CN104674820A (en) * | 2013-11-27 | 2015-06-03 | 上海城地建设股份有限公司 | Novel surrounding structure system and construction method for reducing vibration |
| CN104929110A (en) * | 2015-05-20 | 2015-09-23 | 孙文 | Novel variable stiffness composite pile, construction method of novel variable stiffness composite pile, and long spiral drilling machine adopted in construction method |
| CN104929109A (en) * | 2015-05-20 | 2015-09-23 | 骆嘉成 | Replaceable press-grouted cement soil composite pile, construction method of replaceable press-grouted cement soil composite pile and long twist drill employed in construction method |
| CN109944237A (en) * | 2019-02-28 | 2019-06-28 | 东南大学 | A kind of FRPC of pile sinking process |
| CN111593727A (en) * | 2020-05-29 | 2020-08-28 | 山东省建筑科学研究院有限公司 | Variable cross-section cement-soil core-insert combined pile, construction device and method |
| CN111809611A (en) * | 2020-08-24 | 2020-10-23 | 黑龙江辰午建筑工程有限公司 | Construction method of jet grouting prefabricated composite pile |
| CN112921958A (en) * | 2021-01-29 | 2021-06-08 | 徐州八方建筑工程有限公司 | High-pressure jet grouting hole-leading static pressure pile construction method |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161151A (en) * | 2013-04-02 | 2013-06-19 | 中国水电顾问集团中南勘测设计研究院 | Construction method of high pressure jet grouting hollow strengthening tubular pile and high pressure jet grouting hollow strengthening tubular pile |
| CN103161151B (en) * | 2013-04-02 | 2015-08-26 | 中国电建集团中南勘测设计研究院有限公司 | A kind of high-pressure rotary-spray hollow reinforces construction method and the high-pressure rotary-spray hollow reinforcing pile tube of pile tube |
| CN104674820A (en) * | 2013-11-27 | 2015-06-03 | 上海城地建设股份有限公司 | Novel surrounding structure system and construction method for reducing vibration |
| CN103758127B (en) * | 2013-12-25 | 2016-08-17 | 深圳市鼎邦工程有限公司 | A kind of it is applicable to the pipe pile construction method through hard interbedded layer |
| CN103758127A (en) * | 2013-12-25 | 2014-04-30 | 深圳市鼎邦工程有限公司 | Tubular pile construction method applicable to penetrating hard layer |
| CN104153388A (en) * | 2014-08-22 | 2014-11-19 | 中国建筑西南勘察设计研究院有限公司 | Composite foundation and construction method thereof |
| CN104153357A (en) * | 2014-08-26 | 2014-11-19 | 骆嘉成 | Construction method of composite pile |
| CN104404947A (en) * | 2014-11-20 | 2015-03-11 | 张红 | Construction method for composite pile |
| CN104929110A (en) * | 2015-05-20 | 2015-09-23 | 孙文 | Novel variable stiffness composite pile, construction method of novel variable stiffness composite pile, and long spiral drilling machine adopted in construction method |
| CN104929109A (en) * | 2015-05-20 | 2015-09-23 | 骆嘉成 | Replaceable press-grouted cement soil composite pile, construction method of replaceable press-grouted cement soil composite pile and long twist drill employed in construction method |
| CN109944237A (en) * | 2019-02-28 | 2019-06-28 | 东南大学 | A kind of FRPC of pile sinking process |
| CN109944237B (en) * | 2019-02-28 | 2021-01-26 | 东南大学 | Pile sinking method for FRPC (prestressed concrete pile) |
| CN111593727A (en) * | 2020-05-29 | 2020-08-28 | 山东省建筑科学研究院有限公司 | Variable cross-section cement-soil core-insert combined pile, construction device and method |
| CN111809611A (en) * | 2020-08-24 | 2020-10-23 | 黑龙江辰午建筑工程有限公司 | Construction method of jet grouting prefabricated composite pile |
| CN112921958A (en) * | 2021-01-29 | 2021-06-08 | 徐州八方建筑工程有限公司 | High-pressure jet grouting hole-leading static pressure pile construction method |
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