CN211816208U - Stirring rock-entering precast pile - Google Patents
Stirring rock-entering precast pile Download PDFInfo
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- CN211816208U CN211816208U CN202020058085.XU CN202020058085U CN211816208U CN 211816208 U CN211816208 U CN 211816208U CN 202020058085 U CN202020058085 U CN 202020058085U CN 211816208 U CN211816208 U CN 211816208U
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Abstract
The application relates to the technical field of foundation piling engineering and discloses a stirring rock-entering precast pile, including cement stirring pile and being located precast pile in the cement stirring pile, the precast pile with cement stirring pile solidification formula structure as an organic whole. The precast pile and the cement stirring pile are solidified into an integral structure, so that the precast pile and a soil layer are solidified together through the cement stirring pile, the pile end of the precast pile is firmly fixed on the end face of the rock layer, the bearing capacity of the precast pile is improved, and the stirring rock-entering precast pile can be suitable for a high-rise building foundation. So set up, solved current precast pile and can not go into the rock, the unable limited problem of use in high-rise building basis that improves of bearing capacity.
Description
Technical Field
The application relates to the technical field of foundation piling engineering, in particular to a stirring rock-entering precast pile.
Background
The existing precast pile has soil squeezing effect no matter in hammering type or static pressure type, and the precast pile has not very high bearing capacity, so that the precast pile is suitable for geological conditions of penetrating through common cohesive soil, sand soil below medium density and silt soil, and a bearing layer entering into dense sand soil and hard clay. The slightly dense and compact middle interlayer or the gravel soil is difficult to penetrate and cannot penetrate through the soil layer with obvious frozen swelling property. There is a certain request for geological conditions.
Due to the restriction of the construction capability of the pile machine and the impact load resistance of the precast pile, the bearing capacity of the precast pile cannot be improved, the precast pile cannot enter rock, and the use of the precast pile in a high-rise building foundation is limited.
Therefore, how to solve the problem that the existing precast pile cannot enter the rock, the bearing capacity cannot be improved and the use is limited in the high-rise building foundation becomes an important technical problem to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art at least to a certain extent, the application aims to provide a stirring rock-entering precast pile, which can solve the problem that the existing precast pile cannot enter the rock, the bearing capacity cannot be improved, and the use is limited in a high-rise building foundation.
The utility model provides a rock precast pile is gone into in stirring, including cement stirring stake with be located precast pile in the cement stirring stake, the precast pile with the cement stirring stake solidification formula structure as an organic whole.
Preferably, the precast pile is a solid square pile.
Preferably, the precast pile is hollow tubular pile, the cement stirring stake is including first portion and second portion, the first portion is located in the hollow tubular pile the second portion is located outside the hollow tubular pile, and all with the hollow tubular pile solidifies as an organic wholely.
Preferably, the precast pile is coaxial with the cement mixing pile.
Preferably, the precast pile and the cement mixing pile have the same length.
Preferably, the cement mixing pile is a cement soil pile.
Preferably, the precast pile is a reinforced precast concrete pile.
Preferably, the cement mixing pile is prepared by a deep mixing pile machine.
Preferably, the precast pile is a prestressed concrete pipe pile.
Preferably, the precast pile is a steel pipe pile or section steel.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the application provides a rock precast pile is gone into in stirring, including cement stirring stake and precast pile, the precast pile is located cement stirring stake, and precast pile and cement stirring stake solidification formula structure as an organic whole make precast pile and soil layer through the solidification of cement stirring stake together to make the stake end of precast pile firmly fix on the end aspect of rock layer, improved the bearing capacity of precast pile, make this rock precast pile is gone into in stirring can be applicable to high-rise building basis. So set up, solved current precast pile and can not go into the rock, the unable limited problem of use in high-rise building basis that improves of bearing capacity.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a cross-sectional view of a mixing driven precast pile (the precast pile is a solid square pile) according to an exemplary embodiment;
fig. 2 is a cross-sectional view of a mixing rock-entering precast pile (the precast pile is a hollow round pipe pile) shown according to an exemplary embodiment;
fig. 3 is a cross-sectional view of a mixing precast pile (the precast pile is a hollow square pile) according to an exemplary embodiment.
In the figure:
1. stirring the piles with cement; 2. prefabricating a pile; 3. a first portion; 4. a second portion.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
Referring to fig. 1-3, the embodiment provides a precast pile for stirring into rock, which comprises a cement stirring pile 1 and a precast pile 2, wherein the precast pile 2 is located in the cement stirring pile 1, and the precast pile 2 and the cement stirring pile 1 are solidified into an integrated structure, so that the precast pile 2 and a soil layer are solidified together through the cement stirring pile 1, and a pile end of the precast pile 2 is firmly fixed on an end face of a rock layer, thereby improving the bearing capacity of the precast pile 2, and enabling the precast pile for stirring into rock to be suitable for a high-rise building foundation.
So set up, solved current precast pile 2 can not go into the rock, and the bearing capacity can't improve and use limited problem in high-rise building basis.
In one embodiment, as shown in fig. 1, the precast pile 2 may be a solid square pile which is located in the middle of the cement mixing pile 1 and is cured with the cement mixing pile 1 into a one-piece structure.
The solid square pile can be a concrete solid square pile, the length and the section can be selected within a certain range according to needs, and due to prefabrication on the ground, the manufacturing quality is easy to guarantee, the bearing capacity is high, the durability is good, and the engineering application is wide.
In another embodiment, as shown in fig. 2, the precast pile 2 may be a hollow pipe pile, and the cement mixing pile 1 includes a first portion 3 and a second portion 4, the first portion 3 is located in the hollow pipe pile, the second portion 4 is located outside the hollow pipe pile, the first portion 3 and the second portion 4 are both cured with the hollow pipe pile to form an integral structure, so that the hollow pipe pile and the cement mixing pile 1 are cured to form an integral structure, the pile end of the hollow pipe pile is firmly fixed on the end face of the rock layer, and the bearing capacity of the precast pile 2 is improved.
Here, as shown in fig. 2, the precast pile 2 may be a hollow round tubular pile, as shown in fig. 3, or a hollow square tubular pile, which is not specifically limited and may be determined according to actual needs.
In this embodiment, the precast pile 2 is coaxial with the cement mixing pile 1, that is, the axis of the precast pile 2 is the same straight line as the axis of the cement mixing pile 1, or the center line of the precast pile 2 is the same straight line as the center line of the cement mixing pile 1, so that the bearing capacity of the precast pile 2 is enhanced, and the stress of the precast pile 2 is balanced.
And, precast pile 2 is the same with the length of cement mixing stake 1, like this, does benefit to the bearing capacity that improves precast pile 2, prevents that the atress is uneven and damage when using.
In this embodiment, the cement mixing pile 1 may be a cement soil pile, the cement mixing pile 1 is a main agent using cement as a curing agent, and the cement is sprayed into the soil body by using the mixing pile machine and sufficiently mixed, so that a series of physical and chemical reactions occur between the cement and the soil, and the soft soil is hardened to improve the strength of the foundation. The soil body is consolidated by forcibly stirring the soft soil and the cement (curing agent) through a deep layer stirrer and utilizing a series of physical and chemical reactions generated between the cement and the soft soil to form the cement soil pile with integrity, water stability and certain strength.
The precast pile 2 can be a reinforced precast concrete pile, and in order to resist hammering and penetrate through a soil layer, stirrups are arranged on the pile top and the pile tip in an encrypted mode, main reinforcements at the pile tip are bent up and welded on a core rod. The precast reinforced concrete pile 2 has the advantages of simple and convenient manufacture, high strength, large rigidity and capability of being manufactured into various section shapes.
The precast pile 2 may also be a prestressed concrete pipe pile, which may be classified into a post-tensioned prestressed pipe pile and a pre-tensioned prestressed pipe pile. The pre-tensioning method prestressed pipe pile is a hollow cylinder body elongated concrete prefabricated component which is manufactured by adopting a pre-tensioning method prestressed process and a centrifugal forming method, mainly comprises a cylindrical pile body or a square cylindrical pile body, an end plate, a steel ferrule and the like, and is serialized and marketized, so that a user can conveniently and quickly purchase the pre-tensioning method prestressed pipe pile according to the requirement; the centrifugal technology is adopted for industrial production, so that the efficiency is high, the forming quality is stable, and the strength is high; the resource is saved by adopting a pre-tensioning centrifugal technology; short construction period, convenient pile length adjustment, small influence of noise on environment, no pollution to environment and no violent vibration.
The precast pile 2 can also be a steel pipe pile, the steel pipe pile is composed of a steel pipe, a rabbet mortise and a rabbet dowel pin, the rabbet groove is vertically connected on the pipe wall at the left end of the diameter of the steel pipe, the cross section of the rabbet groove is in a square frame shape with one side opened, a reinforcing rib is arranged on the side surface of the rabbet groove, the rabbet pin is vertically connected on the pipe wall at the right end of the diameter of the steel pipe and at a position deviated from the radius, the section of the groove of the rabbet pin is in an I shape, and the functions of water enclosing, soil enclosing, sand enclosing and the like can be achieved.
The precast pile 2 can also be formed steel, and the formed steel is strip-shaped steel with certain cross-sectional shape and size and is one of four large varieties (plates, pipes, sections and wires) of steel. According to the section shape, the section steel is divided into simple section steel and complex section steel (deformed steel), and the design style is flexible and rich; the structure dead weight is light. Compared with the self weight of a concrete structure, the self weight of the structure is reduced, the internal force of the structural design is reduced, the requirement on the treatment of the building structure foundation is low, the construction is simple and convenient, and the manufacturing cost is reduced; the effective use area of the structure is increased. Compared with a concrete structure, the steel structure column has small section area, so that the effective use area of a building can be increased by 4-6% according to different forms of the building; the mechanical processing, the structural connection and the installation are convenient, and the disassembly and the reuse are easy; the construction speed of the project is fast, the occupied area is small, the method is suitable for all-weather construction, and the influence of weather conditions is small.
Here, the precast pile 2 is not particularly limited, and the precast pile 2 may be selected according to actual needs.
In this embodiment, the method for manufacturing the precast pile for stirring into rock includes the steps of: implanting a cement mixing pile 1, wherein the cement mixing pile 1 penetrates through a soil layer through a deep mixing pile machine and is implanted into the end face of the rock stratum, so that cement paste in the cement mixing pile 1 and soil in the soil layer are solidified to form the cement mixing pile 1;
and then the precast pile 2 is implanted into the cement mixing pile 1, so that the precast pile 2 and the cement mixing pile 1 are solidified, thereby forming a mixed rock precast pile, and the pile end of the precast pile 2 is firmly fixed on the end surface of the rock layer.
Note that, before the precast pile 2 is implanted into the cement mixing pile 1, the cement mixing pile 1 is not yet solidified, so that the precast pile 2 is implanted into the cement mixing pile 1 and is solidified with the cement mixing pile 1 to form a mixed rock precast pile.
The cement paste in the cement mixing pile 1 is solidified with soil, the precast pile 2 is solidified with the cement mixing pile 1, layer-by-layer resistance is increased, the pile end of the precast pile 2 is firmly fixed on a rock layer, the end layer force of the pile end of the precast pile 2 on the rock layer is increased, the bearing capacity of the precast pile 2 is improved, and the precast pile is suitable for high-rise building foundations.
The process of implanting the cement mixing pile 1 comprises the following steps:
positioning, namely positioning a drilling machine of the deep mixing pile machine according to the sampling point and aiming a drill bit at the center of a pile position;
paying off according to a design drawing, accurately determining the position of each stirring pile, inserting a bamboo stick into a soil layer, and spreading lime at the pile position to make a mark, wherein the pile position error of each pile is not more than 5 cm. And meanwhile, retest work is well done, whether the pile position mark is moved or not is often checked in later construction, and the accuracy of the pile position of the slurry jet mixing pile is ensured. The site elevation is measured to determine the borehole depth. And (3) installing and debugging the drilling machine, checking the rotating speed, the air compression equipment, the length of the drill rod, the diameter of the drill bit and the like, connecting a slurry conveying pipeline, moving the drilling machine to a specified position, and carrying out pile position centering.
Drilling, namely starting a drilling machine of the deep mixing pile machine to drill to a designed depth;
after the mixer and related equipment normally operate, a mixing motor is started to enable the mixer to rotate and cut soil and sink, a slurry feeding pump is started to spray cement slurry to a soil body, and the two groups of blades rotate forward and backward to cut and mix the soil body at the same time until the designed depth is reached.
Grouting, namely starting a guniting pump of the deep mixer simultaneously in the drilling process to enable the cement paste to be sprayed into the stirred soil through the guniting pump, and enabling the cement paste and the soil to be fully mixed;
and (3) repeatedly stirring and lifting, adopting a two-spraying four-stirring process, closing a guniting pump when the repeated stirring is lifted to the top of the pile body, stopping stirring, and finishing the preparation of the cement stirring pile 1.
The method is characterized in that slurry preparation is further included before grouting, the slurry proportioning is provided according to laboratory tests, on-site slurry preparation is carried out, the prepared slurry has good fluidity and is not isolated, pumping and spraying stirring are convenient, the slurry is stirred uniformly, and a filter screen is added for sieving, so that the mortar is used for on-site preparation. The water cement ratio is strictly controlled in cement slurry preparation, the added water is provided with a quantitative container, and the prepared and mixed cement slurry cannot be stopped for too long time, and cannot be used for more than 2 hours. The slurry is continuously stirred in the mortar mixer until it is pumped.
The method also comprises the following steps before the precast pile 2 is implanted: removing the deep mixing pile machine; and hoisting the precast pile 2 by a crane, and moving the precast pile 2 to the upper part of the cement mixing pile 1.
After the cement mixing pile 1 is prepared, the deep mixing pile machine is removed so as to implant the precast pile 2. After the deep mixing pile machine is removed, the precast pile 2 is moved above the cement mixing pile 1 by using a crane, so that the precast pile 2 is conveniently implanted into the cement mixing pile 1.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The utility model provides a stirring goes into rock precast pile, its characterized in that, including cement stirring stake (1) and being located precast pile (2) in cement stirring stake (1), precast pile (2) with cement stirring stake (1) solidification formula structure as an organic whole.
2. A pre-cast pile for stirring into rock as claimed in claim 1, characterised in that the pre-cast pile (2) is a solid square pile.
3. The stirring rock-entering precast pile according to claim 1, characterized in that the precast pile (2) is a hollow tubular pile, the cement stirring pile (1) comprises a first part (3) and a second part (4), the first part (3) is located inside the hollow tubular pile, the second part (4) is located outside the hollow tubular pile, and the first part and the second part are all solidified into a whole.
4. A mixing rock-entering precast pile according to claim 1, characterized in that the precast pile (2) is coaxial with the cement mixing pile (1).
5. A mixing rock-entering precast pile according to claim 1, characterized in that the precast pile (2) is the same length as the cement mixing pile (1).
6. A pre-pile for mixing into rock according to claim 1, characterised in that the cement mixing pile (1) is a cement-soil pile.
7. A pre-cast pile stirred into rock as claimed in claim 1, characterised in that the pre-cast pile (2) is a pre-cast reinforced concrete pile.
8. A precast pile for stirring into rock according to claim 1, characterized in that the cement mixing pile (1) is prepared by a deep mixing pile machine.
9. A precast pile stirred into rock according to claim 1, characterized in that the precast pile (2) is a prestressed concrete pipe pile.
10. A precast pile stirred into rock according to claim 1, characterised in that the precast pile (2) is a steel pipe pile or a steel section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020058085.XU CN211816208U (en) | 2020-01-10 | 2020-01-10 | Stirring rock-entering precast pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020058085.XU CN211816208U (en) | 2020-01-10 | 2020-01-10 | Stirring rock-entering precast pile |
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| CN211816208U true CN211816208U (en) | 2020-10-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101510A (en) * | 2020-01-10 | 2020-05-05 | 吉林东煤建筑基础工程公司 | Method for manufacturing stirring rock-entering precast pile and stirring rock-entering precast pile |
| CN112854278A (en) * | 2021-01-09 | 2021-05-28 | 湖北工业大学 | Composite energy pile formed by internally and externally concreting precast pile and mixing pile and construction process of composite energy pile |
-
2020
- 2020-01-10 CN CN202020058085.XU patent/CN211816208U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111101510A (en) * | 2020-01-10 | 2020-05-05 | 吉林东煤建筑基础工程公司 | Method for manufacturing stirring rock-entering precast pile and stirring rock-entering precast pile |
| CN112854278A (en) * | 2021-01-09 | 2021-05-28 | 湖北工业大学 | Composite energy pile formed by internally and externally concreting precast pile and mixing pile and construction process of composite energy pile |
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Address after: No. 1929, Jianshe street, Chaoyang District, Changchun City, Jilin Province Patentee after: Jilin Dongmei Construction Foundation Engineering Co.,Ltd. Address before: No. 1929, Jianshe street, Chaoyang District, Changchun City, Jilin Province Patentee before: JILIN DONGMEI ARCHITECTURAL BASE ENGINEERING Co.,Ltd. |