CN218027787U - Connecting structure for rigidity adjusting device and prefabricated hollow pile - Google Patents

Abstract

The utility model discloses a joint construction that is used for between rigidity adjusting device and the prefabricated hollow pile, include: the device comprises a rigidity adjusting device, a raft plate, a brick moulding bed, gravels, an inverted pile cap and a prefabricated hollow pile, wherein the lower end of the inverted pile cap is connected with the prefabricated hollow pile, the upper end of the inverted pile cap is connected with the rigidity adjusting device, and the upper end of the rigidity adjusting device is connected with the raft plate; the hollow brick moulding bed is fixedly installed on the outer side of the inverted pile type pile cap, the upper end of the brick moulding bed is attached to the bottom surface of a raft of the raft, and gravels are filled between the inner surface of the brick moulding bed and the outer surface of the inverted pile type pile cap and between the inner surface of the brick moulding bed and the outer surface of the rigidity adjusting device. The connection structure has the characteristics of safety, feasibility, simple construction steps, lower construction cost and the like, improves the working performance and construction quality of the controllable rigidity piled raft foundation, and is favorable for promoting the application of the rigidity adjusting device in the prefabricated hollow pile engineering, thereby further promoting the popularization of the controllable rigidity piled raft foundation technology.

Description

Connecting structure for rigidity adjusting device and prefabricated hollow pile

Technical Field

The utility model belongs to the technical field of the foundation basis, specifically, relate to a joint construction that is used for between rigidity adjusting device and the prefabricated hollow pile.

Background

The precast pile is a pile type which is prefabricated in a factory and then transported to the site for construction, and has the characteristics of high construction speed, low manufacturing cost, wide application range and the like. In recent years, with the acceleration of urban construction steps, precast piles gradually become the preferred pile types of designers, and the development of pile foundation technology is promoted.

The bearing capacity and the deformation are seemingly independent but highly coupled, and jointly determine the supporting rigidity of the pile foundation, so that the manual accurate intervention on the supporting rigidity of the pile foundation is very difficult. However, by arranging a special rigidity adjusting device between the piles and the raft, the rigidity of the pile foundation support and the accurate interference and adjustment of the size and distribution of the whole pile-raft foundation support are economically and effectively realized, and the engineering problems that the conventional technologies such as the pile-soil combined action of the piles with large support rigidity, the variable rigidity leveling of large-chassis buildings or building groups, the construction of high-rise buildings or super high-rise buildings in areas with complicated geological conditions, the recycling of waste pile foundations of buildings and the like cannot solve or have large cost can be effectively solved.

The publication number CN101487267B provides 'a pile-raft foundation with adjustable supporting rigidity and a construction process', and the structure in the form is subjected to practical tests along with popularization and application of the pile-raft foundation with the adjustable supporting rigidity, so that good effects are achieved. However, this installation method is only suitable for use when the raft foundation pile of the controllable stiffness pile is a cast-in-place pile, and when the foundation pile is a prefabricated hollow pile, the stiffness adjusting device cannot be installed according to the above method, which greatly limits the popularization and application of the stiffness adjusting device in the precast pile engineering.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a connection structure for between rigidity adjusting device and the prefabricated hollow pile has characteristics such as safe feasible, construction step is simple, construction cost is lower, has promoted controllable rigidity piled raft foundation's working property and construction quality, is favorable to promoting the application of rigidity adjusting device in prefabricated hollow pile engineering to further promote the popularization of controllable rigidity piled raft foundation technique.

In order to achieve the technical purpose, the utility model adopts the following technical scheme: a connection construction for a stiffness adjustment device to a pre-cast hollow pile, comprising: the device comprises a rigidity adjusting device, a raft plate, a brick moulding bed, gravels, an inverted pile cap and a prefabricated hollow pile, wherein the lower end of the inverted pile cap is connected with the prefabricated hollow pile, the upper end of the inverted pile cap is connected with the rigidity adjusting device, and the upper end of the rigidity adjusting device is connected with the raft plate; the utility model discloses a raft structure, including the type of falling stake pile cap, the outside fixed mounting of type of falling stake pile cap has hollow brick fetal membrane, the upper end of brick fetal membrane and the laminating of raft bottom surface of raft, pack the grit between the internal surface of brick fetal membrane and the surface of type of falling stake pile cap, between the internal surface of brick fetal membrane and rigidity adjusting device's the surface.

Further, the inverted pile type pile cap is a straight pipe section and an inverted trapezoid section which are connected in sequence from top to bottom, the height of the straight pipe section is not less than 100mm, and the height of the inverted trapezoid section is not less than 200mm.

Furthermore, two layers of horizontal reinforcing mesh with the diameter of not less than 10 mm and the distance of not more than 150 mm are arranged in the straight pipe section, and the reinforcing mesh is vertically provided with force transmission ribs.

Further, the rigidity adjusting device includes: the side guard plates, the rigidity adjusting device base, the rigidity adjuster, the cavity, the upper cover plate and the positioning bolts are arranged in the cavity, the rigidity adjuster is fixedly connected with the rigidity adjusting device base through the positioning bolts, the upper cover plate of the rigidity adjusting device is connected with the raft, the two ends of the upper cover plate are respectively provided with one side guard plate, one end of each side guard plate is fixedly connected with the upper cover plate, and the other end of each side guard plate is in contact with the outer surface of the inverted pile cap.

Further, the rigidity regulator is of a circular truncated cone-shaped structure with a narrow top and a wide bottom, and waste tire particles are filled in the cavity.

Further, the arrangement mode of a plurality of rigidity regulators is as follows: a horizontal parallel arrangement mode or a top-to-bottom overlapped arrangement mode.

Furthermore, the rigidity adjusting device base is connected with the inverted pile cap through not less than 4 force transmission ribs, the diameter of not less than 12 mm and the length of not less than 200mm.

Furthermore, the rigidity adjusting device is provided with a grouting pipe and a deformation identification rod, and the grouting pipe and the deformation identification rod are sealed at the pipe orifice by adopting a waterproof plug during construction.

Furthermore, a reinforcement cage is arranged in the prefabricated hollow pile, and anchoring reinforcement bars are arranged at the upper part of the reinforcement cage.

Furthermore, a cushion layer, a reversed filter layer and geotextile are sequentially arranged between the outside of the brick bed film and a soil body from top to bottom.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) The utility model discloses a connection structure for between rigidity adjusting device and the prefabricated hollow pile utilizes the mode of dowel bar core filling to fill the prefabricated hollow pile, and the type of falling pile cap of secondary pouring is connected through the anchor bar, has promoted the bulk strength and the rigidity of prefabricated hollow pile by a wide margin, makes the upper portion load distribution of top-down transmission more even, makes the connection between type of falling pile cap and the prefabricated hollow pile more firm, and the tensile property and the shear behavior of its junction are showing and are improving;

(2) The utility model utilizes the secondary concreting structure to form the inverted pile cap, and the rigidity adjusting device base is arranged on the inverted pile cap, thereby realizing the application of the rigidity adjusting device in the precast pile engineering and solving the problem of stress concentration at the top of the precast pile for installing the rigidity adjusting device;

(3) The utility model is used for joint construction between rigidity adjusting device and the prefabricated hollow pile has safe feasible, construction step is simple reasonable, the efficiency of construction is high, construction cost low grade characteristics, has promoted controllable rigidity stake raft foundation's working property and construction quality, is favorable to promoting the application of rigidity adjusting device in prefabricated hollow pile engineering to further promote the popularization of controllable rigidity stake raft foundation technique.

Drawings

Fig. 1 is a sectional view of the connection structure between the stiffness adjusting device and the prefabricated hollow pile according to the present invention;

FIG. 2 is a plan view of the connection structure between the stiffness adjusting device and the prefabricated hollow pile according to the present invention;

wherein, 1-waterproof plug; 2-grouting pipe; 3-a deformation marking rod; 4-raft plates; 5-cushion coat; 6-inverted filter layer; 7-geotextile; 8-brick moulding bed; 9-sandstone; 10-side guard plate; 11-a stiffness adjustment device base; 12-a stiffness adjuster; 13-a cavity; 14-top surface of pile cap; 15-bottom surface of raft board; 16-prefabricating a steel mould; 17-force transmission ribs; 18-a reinforcing mesh; 19-inverted pile cap; 20-anchoring steel bars; 21-a reinforcement cage; 22-prefabricating a hollow pile; 23-an upper cover plate; 24-positioning bolt.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1-2, the utility model provides a be used for the joint construction between rigidity adjusting device and the prefabricated hollow pile, include: the rigidity adjusting device comprises a rigidity adjusting device, a raft plate 4, brick moulding beds 8, gravels 9, an inverted pile type pile cap 19 and a prefabricated hollow pile 22, wherein the lower end of the inverted pile type pile cap 19 is connected with the prefabricated hollow pile 22, the upper end of the inverted pile type pile cap 19 is connected with the rigidity adjusting device, the upper end of the rigidity adjusting device is connected with the raft plate 4, the position of the rigidity adjusting device relative to the prefabricated hollow pile 22 can be adjusted by utilizing the telescopic deformation of the rigidity adjusting device, and therefore the controllable adjustment of the rigidity of the pile top structure of the prefabricated hollow pile 22 is achieved. The outside fixed mounting of type of falling stake pile cap 19 has hollow brick fetal membrane 8, the upper end of brick fetal membrane 8 and the laminating of raft bottom surface 15 of raft 4, between the internal surface of brick fetal membrane 8 and the surface of type of falling stake pile cap 19, pack grit 9 between the internal surface of brick fetal membrane 8 and the surface of rigidity adjusting device, pack grit 9 utilizing the fixed action of brick fetal membrane 8, can be ingenious utilize grit 9 to fix a position rigidity adjusting device and the position of type of falling stake pile cap 19 fixedly, be convenient for install raft 4, thereby make the construction more convenient.

The utility model discloses well type pile cap 19 of falling a pile is in prefabricated steel mould of the top frame of prefabricated hollow pile 22, carry on the concrete structure that the secondary poured formed has the trapezoidal structure that falls, and type pile cap 19 of falling a pile is the straight tube section and the trapezoidal section that falls that connect gradually from top to bottom, and the height of straight tube section is not less than 100mm, and the height of the trapezoidal section of falling is not less than 200mm, makes the upper portion load can comparatively evenly pass to prefabricated hollow pile on, has solved the difficult problem of the prefabricated pile top stress concentration of installation rigidity adjusting device; two layers of horizontal reinforcing meshes 18 with the diameter of the reinforcing steel bars being not less than 10 mm and the distance being not more than 150 mm are arranged in the straight pipe section, the reinforcing meshes 18 are vertically provided with the power transmission ribs 17, the longitudinal ribs and the transverse ribs in the reinforcing meshes 18 can form a net structure, and the bonding performance of the reinforcing steel bars and concrete is enhanced, so that the load of an upper structure is uniformly distributed, the anti-cracking performance of the secondary cast concrete structure is obviously improved, and the overall strength and the rigidity of the secondary cast concrete structure are further improved by the arrangement of the vertical power transmission ribs 17, so that the requirement of bearing is met.

The utility model discloses well rigidity adjusting device includes: the side guard plate 10, rigidity adjusting device base 11, rigidity regulator 12, cavity 13, upper cover plate 23, positioning bolt 24, be equipped with one or more rigidity regulator 12 in the cavity 13, rigidity regulator 12 is made by the steel alloy, for the round platform shape structure of narrow top down width, the mode of arranging of a plurality of rigidity regulators 12 does: the horizontal parallel arrangement mode or the arrangement mode of stacking from top to bottom, waste tire particles are filled in the cavity 13 and used as buffer materials, the rigidity regulator 12 is fixedly connected with the rigidity regulating device base 11 through the positioning bolts 24, the supporting rigidity of the rigidity regulator 12 can be regulated through rigidity change of steel alloy materials, and then the purpose that the rigidity of the high-rise building piled raft foundation support can be regulated and controlled is achieved. The upper cover plate 23 of the rigidity adjusting device is connected with the raft 4, two ends of the upper cover plate 23 are respectively provided with a side guard plate 10, one end of each side guard plate 10 is fixedly connected with the upper cover plate 23, the other end of each side guard plate 10 is in contact with the outer surface of the inverted pile cap 19, and the arrangement of the side guard plates 10 can ensure that the buffer material filled in the cavity 10 is compact and does not leak.

The utility model discloses well rigidity adjusting device is last to be equipped with slip casting pipe 2 and deformation sign pole 3, and slip casting pipe 2 and deformation sign pole 3 adopt waterproof end cap 1 to carry out the mouth of pipe and seal during the construction to prevent that the mouth of pipe from blockking up.

The utility model discloses well rigidity adjusting device base 11 is connected with the type of falling pile cap 19 through being no less than 4, 12 mm, length are no less than through 12 mm, diameter biography power muscle 17 that 200mm is no less than, can prevent that rigidity adjusting device from producing horizontal displacement and rigidity adjusting device when flexible deformation pile cap top surface 14 from taking place the slope in the use for rigidity adjusting device's structure is more stable, and the performance is more reliable, simultaneously can accurately survey rigidity adjusting device's deflection. The utility model discloses well rigidity adjusting device base 11 should be the high strength steel sheet that thickness is not less than 10 mm.

The utility model discloses be equipped with steel reinforcement cage 21 in well prefabricated hollow pile 22, the upper portion of steel reinforcement cage 21 is equipped with anchor reinforcing bar 20, and the setting of steel reinforcement cage 21 is used for promoting prefabricated hollow pile 22's bulk strength and rigidity for top-down transmits upper portion load distribution more evenly, and anchor reinforcing bar 20's setting makes the secondary pour the pile cap 19 that forms and be connected between the precast pile more firmly, has promoted the tensile strength and the shear behavior of both junctions.

The utility model discloses be equipped with bed course 5, inverted filter 6 and geotechnological cloth 7 from top to bottom in proper order between the outside of well brick fetal membrane 8 and the soil body, can promote piled raft foundation's wholeness to a certain extent.

The utility model is used for rigidity adjusting device and prefabricated hollow pile between connection structure's construction method, including following step:

firstly, inserting a reinforcement cage 21 and longitudinal reinforcements into an inner core of a prefabricated hollow pile 22, extending a proper amount of anchoring reinforcements 20 from the upper part of the reinforcement cage 21 to be lapped with a cast-in-place inverted pile type pile cap 19, and then performing concrete pouring and filling on the hollow inner core of the reinforcement cage 21;

secondly, supporting a prefabricated steel mould 16 on the top surface of a prefabricated hollow pile 22, casting and tamping layered concrete, putting a horizontally-structured steel bar mesh 18 in the casting process, inserting a force transmission bar 17 connected with a steel bar adjusting device base 11, completing secondary casting section casting, and removing the mould after curing and forming to form an inverted pile cap 19;

thirdly, installing a rigidity regulator 12 in the rigidity regulating device, and then welding the rigidity regulating device at the central position of the pile cap top surface 14 through a steel bar regulating device base 11 and a force transmission bar 17 to ensure that a side protection plate 10 of the rigidity regulating device is just contacted with the outer side surface of an inverted pile cap 19;

fourthly, manufacturing a brick moulding bed 8 outside the rigidity adjusting device and the inverted pile cap 19, filling sand stones 9 between the inner surface of the brick moulding bed 8 and the outer wall of the side guard plate 10 of the rigidity adjusting device and the outer surface of the inverted pile cap 19, and arranging a cushion layer 5, an inverted filter layer 6 and geotextile 7 between the outer part of the brick moulding bed 8 and the soil body;

fifthly, pouring a concrete raft 4 on the rigidity adjusting device and the upper part of the brick moulding bed 8, and pre-burying a steel pipe in the raft 4, so that the grouting pipe 2 and the deformation identification rod 3 on the top of the rigidity adjusting device can penetrate through the steel pipe and extend out of the raft 4 after the pouring of the raft 4 is finished;

and sixthly, observing the deformation of the rigidity adjusting device through the deformation identification rod 3 after the construction is finished, and pouring high-performance composite grouting material in the rigidity adjusting device between the precast pile 22 and the raft 4 through the overhanging grouting pipe 2 after the displacement adjustment of the precast hollow pile 22 provided with the rigidity adjusting device is finished, so that the precast hollow pile 22 and the raft 4 are connected into a whole.

By adopting the technical scheme, the construction method of the connection structure between the rigidity adjusting device and the precast pile is safe and feasible, the steps are simple and reasonable, the construction cost is low, the construction efficiency can be effectively improved, and the construction quality can be effectively improved.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.

Claims (10)

1. A connection construction for a rigidity adjusting device and a precast hollow pile, characterized by comprising: the device comprises a rigidity adjusting device, a raft plate (4), a brick moulding bed (8), gravels (9), an inverted pile cap (19) and a prefabricated hollow pile (22), wherein the lower end of the inverted pile cap (19) is connected with the prefabricated hollow pile (22), the upper end of the inverted pile cap (19) is connected with the rigidity adjusting device, and the upper end of the rigidity adjusting device is connected with the raft plate (4); the utility model discloses a raft structure, including the type of falling stake pile cap, the outside fixed mounting of type of falling stake pile cap (19) has hollow brick fetal membrane (8), the upper end of brick fetal membrane (8) and raft bottom surface (15) laminating of raft board (4), pack grit (9) between the internal surface of brick fetal membrane (8) and the surface of type of falling stake pile cap (19), between the internal surface of brick fetal membrane (8) and rigidity adjusting device's the surface.

2. A connecting construction between a rigidity adjusting device and a precast hollow pile according to claim 1, characterized in that the inverted pile cap (19) is a straight pipe section and an inverted trapezoid section which are connected in sequence from top to bottom, the height of the straight pipe section is not less than 100mm, and the height of the inverted trapezoid section is not less than 200mm.

3. A connection structure for a stiffness adjusting device and a prefabricated hollow pile according to claim 2, wherein two layers of horizontal reinforcing mesh (18) with the diameter not less than 10 mm and the distance not more than 150 mm are arranged in the straight pipe section, and the force transmission rib (17) is vertically arranged on the reinforcing mesh (18).

4. A connection construction for a stiffness adjustment device to a pre-cast hollow pile according to claim 1, wherein the stiffness adjustment device comprises: side guard plate (10), rigidity adjusting device base (11), rigidity regulator (12), cavity (13), upper cover plate (23), positioning bolt (24), be equipped with one or more rigidity regulator (12) in cavity (13), rigidity regulator (12) pass through positioning bolt (24) and rigidity adjusting device base (11) fixed connection, rigidity adjusting device's upper cover plate (23) are connected with raft board (4), the both ends of upper cover plate (23) are equipped with one side guard plate (10) respectively, the one end and the upper cover plate (23) fixed connection of every side guard plate (10), the other end and the outer surface contact of type pile cap (19) of falling the stake of side guard plate (10).

5. A connection construction for a stiffness adjusting device and a pre-fabricated hollow pile according to claim 4, characterized in that the stiffness adjuster (12) is of a truncated cone structure with a narrow top and a wide bottom, and the cavity (13) is filled with waste tire particles.

6. A connection construction for a stiffness adjustment device to a pre-cast hollow pile according to claim 4, characterised in that a plurality of stiffness adjusters (12) are arranged in a manner that: horizontal parallel arrangement or arrangement from top to bottom.

7. A connection construction between a rigidity adjusting device and a precast hollow pile according to claim 4, characterized in that the rigidity adjusting device base (11) is connected with the inverted pile type pile cap (19) through not less than 4 force transmission ribs (17) with the diameter of not less than 12 mm and the length of not less than 200mm.

8. The connection structure for the rigidity adjusting device and the prefabricated hollow pile as claimed in claim 1, wherein the rigidity adjusting device is provided with a grouting pipe (2) and a deformation identification rod (3), and the grouting pipe (2) and the deformation identification rod (3) are subjected to pipe orifice closing by a waterproof plug (1) during construction.

9. A connection construction between a stiffness adjusting device and a precast hollow pile according to claim 1, wherein a reinforcement cage (21) is provided in the precast hollow pile (22), and an anchoring reinforcement (20) is provided at an upper portion of the reinforcement cage (21).

10. The connection structure for the rigidity adjusting device and the precast hollow pile according to claim 1, wherein a cushion layer (5), a reversed filter layer (6) and a geotextile (7) are sequentially arranged between the outside of the brick bed membrane (8) and a soil body from top to bottom.

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