CN218622217U - Self-balancing pressing-in construction device for precast pile - Google Patents

Abstract

The utility model provides a self-balancing pressing-in construction device for precast piles, which comprises a steel pipe inserted into a soil body, a fixed frame and a pressure frame, wherein grouting pipes are arranged outside the steel pipe, two sides of the upper part of the steel pipe are respectively provided with a frame, and the frame is provided with a winch set; the pressure frame is arranged at the upper end of a pile body in the steel pipe, the hoisting units on two sides of the upper part of the steel pipe are connected with two sides of the pressure frame, and the pressure frame moves downwards under the traction of the hoisting units; the pile body is formed by the equipment of precast bottom pile and precast pile unit, and the mount is used for carrying out interim fixing to precast bottom pile and precast pile unit. When the device is used for piling construction, the construction speed is improved, and simultaneously, mud dado is avoided, so that the device meets the requirement of environmental protection in the process of precast pile construction; on the other hand, the device adopts a self-balancing method, compared with the traditional steel pipe pulling-out operation in the final construction process, the force required for taking out the steel pipe is greatly reduced, and the requirements of economy and energy conservation are met.

Description

Self-balancing pressing-in construction device for precast pile

Technical Field

The utility model relates to a pile foundation field among the foundation engineering, in particular to partial leading hole precast pile self-balancing construction method of impressing.

Background

With the continuous development of modern construction in our country, the technical direction is emphatically promoted, and the construction technical method of the precast pile in the field of pile foundation in the building engineering industry needs to be continuously developed, and comprises pile driving, vibration pile sinking, static pressure pile, water jet pile sinking, drilling pile sinking and the like.

The construction method of the precast pile aims to ensure that the pile body is driven smoothly, and meanwhile, the construction efficiency, the time cost benefit and the environmental influence factor also need to be considered. However, for one of the existing precast pile construction methods, these factors cannot be comprehensively considered, and if the construction method can be technically improved, the disadvantages are greatly reduced, and the disadvantages during construction are reduced.

Therefore, a construction device comprehensively considering construction factors can be found at present, the construction efficiency can be improved, and the effect of environmental protection can be achieved while the cost is saved.

Disclosure of Invention

An object of the utility model is to provide a precast pile self-balancing construction equipment of impressing carries out the pile construction through the device, can effectively reduce and bore the soil volume, reduces the cement paste quantity simultaneously to through adopting the self-balancing method, improved construction speed, practiced thrift construction cost.

The utility model aims at realizing through the following technical scheme: a self-balancing pressing-in construction device for a precast pile comprises a steel pipe, a fixing frame and a pressure frame, wherein the steel pipe is inserted into a soil body, grouting pipes are distributed on the outer side of the steel pipe, machine bases are respectively arranged on two sides of the upper portion of the steel pipe, and a winch unit is arranged on each machine base; the pressure frame is arranged at the upper end of a pile body in the steel pipe, the hoisting units on two sides of the upper part of the steel pipe are connected with two sides of the pressure frame, and the pressure frame moves downwards under the traction of the hoisting units; the pile body is formed by the equipment of precast pile and precast pile unit, and the mount is used for carrying out temporary fixation to precast pile and precast pile unit.

Preferably, the grouting pipes are arranged along the axial direction of the steel pipe and arranged outside the steel pipe in an annular array; the upper end of the grouting pipe is flush with the top end of the steel pipe, and the lower end of the grouting pipe is flush with the bottom end of the steel pipe.

Preferably, the two sides of the upper part of the steel pipe are provided with first bolt holes, and the engine base is installed at the position of the steel pipe provided with the first bolt holes in a bolt connection mode.

Preferably, the pressure frame is of a rectangular plate-shaped structure.

Preferably, two sides of the lower part of the pressure frame are respectively provided with a pressure frame ear plate, and the pressure frame ear plates are provided with ear plate holes; the pressure frame ear plates on two sides below the pressure frame are connected with the winch units on two sides of the upper part of the steel pipe through steel strands.

Preferably, the pressure frame is provided with a second bolt hole and is connected with the flange plate at the top end of the pile body through a bolt.

Preferably, the fixing frame comprises a hoop and a support rod connected to the hoop; when the prefabricated bottom pile or the prefabricated pile unit is fixed, the hoop is tightly held on the prefabricated bottom pile or the prefabricated pile unit, and the lower end of the supporting rod is supported on the ground.

Adopt the utility model provides a construction scheme, compared with the prior art, have following characteristics and beneficial effect:

(1) Compare in the static pressure stake, this device has reduced static pressure by half when the construction, has promoted construction speed, and then has practiced thrift construction cost.

(2) Compare in quiet brill root planting stake, this device has avoided the mud dado when effectively reducing the volume of boring soil when being under construction, and the quantity of grout also corresponding reduction to reach the effect of green construction.

(3) The utility model discloses combined the static pressure stake and the quiet advantage of boring two kinds of technologies of root planting stake, avoided respective not enough, it is better to synthesize technical efficiency.

(4) Compared with the traditional method of pulling out the steel pipe, the method has the advantage that the side frictional resistance of the outer wall of the steel pipe reaches the limit value in the pile pressing process, so that the steel pipe is easier to pull up in the later period.

Drawings

FIG. 1 is a schematic diagram of a steel pipe required by a part of pilot holes provided by the scheme.

Fig. 2 is a cross section view of a steel pipe required for partial hole guiding provided by the scheme in a bolt hole.

Fig. 3 is a longitudinal section view of the steel pipe initially pressed into the soil body required by the partial guide hole provided by the scheme.

Fig. 4 is a longitudinal sectional view of the soil body taken out after the steel pipe required by part of the guide hole is initially pressed into the soil body.

Fig. 5 is a longitudinal sectional view of the soil body taken out completely after the steel pipe required by part of the guide holes is finally pressed into the soil body.

Fig. 6 is a schematic view of a crane lifting a precast bottom pile.

Fig. 7 is a schematic view of the fixing frame fixing the prefabricated bottom pile.

Fig. 8 is a schematic view of the crane lifting the precast pile unit.

Fig. 9 is a schematic view of pile splicing of the precast pile unit and the precast bottom pile.

Fig. 10 is a schematic view of the precast pile unit fixed by the fixing frame.

Fig. 11 is a schematic view of a crane lifting precast pile unit.

Fig. 12 is a schematic view of the splicing of precast pile units.

Fig. 13 is a schematic view of a precast pile extension to the bottom of a pilot hole.

FIG. 14 is a schematic view of the installation of the stand and the hoisting machine set on the upper wall of the steel pipe.

Fig. 15 is a schematic view of a crane lifting precast pile unit.

Fig. 16 is a schematic view of the precast pile unit after the pile has been spliced by the fixing frame.

Fig. 17 is a schematic view of the crane hoisting pressure frame.

Fig. 18 is a perspective view of the pressure frame provided by the present solution.

Fig. 19 is a front plan view of the pressure frame provided by the present solution.

Fig. 20 is a bottom perspective view of the pressure frame provided in the present embodiment.

Fig. 21 is a front sectional view of the hole of the pressure frame according to the present embodiment.

Fig. 22 is a perspective cross-sectional view of the hole of the pressure frame according to the present embodiment.

Fig. 23 is a schematic view of the connection of the hoist unit and the tension frame.

Fig. 24 is a schematic view of the precast pile initially driven into the earth.

Fig. 25 is a schematic view of the final driving of the precast pile into the soil.

Fig. 26 is a schematic view of the hoist disconnected from the pressure frame.

Fig. 27 is a schematic view showing the precast pile being completely pressed into the top of the steel pipe.

Fig. 28 is a schematic diagram of steel pipe extraction synchronous grouting.

Fig. 29 is a schematic view of the whole after completion of grouting.

Fig. 30 is an overall process flow diagram of the self-balancing construction method of the partial guide hole precast pile in the scheme.

The attached drawings are marked as follows: 1-a steel pipe; 2-grouting pipe; 3-a first bolt hole; 4-prefabricating a bottom pile; 5-a fixing frame; 6-a flange plate; 7-precast pile unit; 8-a winch set; 9-a machine base; 10-a pressure frame; 11-a pressure frame ear plate; 12-a second bolt hole; 13-ear plate holes; 14-a bolt; 15-hanging hooks; 16-steel strand wires; 17-a power supply; 18-mortar; 19-mortar spray gun.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art all belong to the protection scope of the present invention.

As shown in fig. 1-30, a self-balancing press-in construction device for precast piles comprises a steel pipe 1, a fixed frame 5, a machine base 9, a winch unit 8 and a pressure frame 10, wherein grouting pipes 2 are distributed on the outer side of the steel pipe 1, and the grouting pipes 2 are arranged along the axial direction of the steel pipe 1 and are arranged on the outer side of the steel pipe 1 in an annular array manner; the upper end of the grouting pipe 2 is flush with the top end of the steel pipe 1, and the lower end of the grouting pipe 2 is flush with the bottom end of the steel pipe 1. In this embodiment, six grouting pipes 2 are provided outside the steel pipe 1. The two sides of the upper part of the steel pipe 1 are respectively provided with a first bolt hole 3, and each side is provided with four first bolt holes 3. The steel pipe 1 is pressed into the soil body, and the first bolt hole 3 at the upper part of the steel pipe 1 is higher than the ground.

The engine base 9 is arranged at the position where the first bolt hole 3 is formed in the upper portion of the steel pipe 1, the engine base 9 is connected with the first bolt hole 3 in the steel pipe 1 through bolts, and the engine base 9 is located on two sides of the upper portion of the steel pipe 1. The winch unit 8 is mounted on the base 9.

The structure of the pressure frame 10 is shown in fig. 18-22, the pressure frame 10 is a rectangular plate-shaped structure, the two sides below the pressure frame 10 are provided with pressure frame ear plates 11, and the pressure frame ear plates 11 are provided with ear plate holes 13. The pressure frame 10 is provided with a second bolt hole 12. The pressure frame 10 is used for installing on the top end of the pile body in the steel pipe 1 and is connected with the flange 6 on the top end of the pile body through bolts 14. The pressure frame ear plates 11 on two sides below the pressure frame 10 are connected with the hoisting units 8 on two sides of the upper part of the steel pipe through steel strands 16. Wherein, the pile body is assembled by a precast bottom pile 4 and a precast pile unit 7.

The fixing frame 5 is used for temporarily fixing the precast bottom pile 4 and the precast pile unit 7 at the time of pile driving construction. Wherein, the fixing frame 5 comprises a hoop and a support rod connected with the hoop. When fixing precast bottom pile 4 or precast pile unit 7, the hoop is held tightly on precast bottom pile 4 and precast pile unit 7, and the lower extreme of bracing piece supports subaerial to carry out temporary fixation to precast bottom pile 4 or precast pile unit 7.

When carrying out partial guide hole precast pile self-balancing push-in construction through this device, including following specific steps:

step one, pressing a steel pipe 1 into a soil body, and enabling a first bolt hole 3 on the steel pipe 1 to be higher than the ground surface; the part of the steel pipe 1 pressed into the soil body forms a precast pile; in the process of pressing the steel pipe 1 into the soil body, the construction is carried out by adopting a mode of pressing in and taking out soil.

Step two, partial guide holes in the steel pipe: with reference to fig. 3, 4, and 5, since soil is removed from the interior of the steel pipe 1 by pressing the steel pipe 1 while soil is removed at the same time, a guide hole is formed in the steel pipe 1 after all soil in the steel pipe 1 is removed, and the guide hole is lowered to the bottom of the steel pipe 1, as shown in fig. 5.

Step three, hanging precast pile units and splicing piles to the bottom of the guide hole: the method comprises the following steps:

3.1 as shown in fig. 6, hoisting a section of prefabricated bottom pile 4 to the upper part of the steel pipe 1 by using a crane, slowly hoisting the prefabricated bottom pile 4 into the steel pipe 1, and ensuring that the prefabricated bottom pile 4 vertically falls; when the prefabricated bottom pile 4 falls into the steel pipe 1 and the top end of the prefabricated bottom pile 4 just exceeds the top of the steel pipe 1, temporarily fixing the prefabricated bottom pile 4 by using a fixing frame 5, as shown in fig. 7;

3.2 as shown in fig. 8, hoisting the precast pile unit 7 by a crane, slowly and vertically connecting the precast bottom piles 4 with fixed lower parts, and connecting the piles by a flange 6; when pile splicing is carried out, the prefabricated bottom pile 4 and the prefabricated pile unit 7 are in coaxial butt joint;

3.3 after pile splicing is finished, as shown in fig. 9, loosening the fixed frame 5, using a crane to uniformly hoist the spliced pile body, and temporarily fixing the top end of the pile body by using the fixed frame 5 when the top end of the pile body falls to the top end of the steel pipe 1, as shown in fig. 10;

3.4 with reference to fig. 11, 12 and 13, repeating the construction steps 3.2 and 3.3, and installing precast pile units 7 one by one at the upper end of the completed pile body until the lower end of the pile body reaches the bottom of the guide hole and the top end of the pile body exceeds the top end of the steel pipe 1.

In the step, the lower end of the prefabricated bottom pile 4 is in a pointed shape, so that the prefabricated bottom pile is conveniently driven into a soil body. Flanges 6 are arranged at the top end of the prefabricated bottom pile 4 and the two ends of the prefabricated pile unit 7, and bolt holes are formed in the flanges 6; the precast pile units 7 or the precast pile units 7 and the precast bottom piles 4 are connected in a flange connection mode; during pile extension, the flanges 6 on two adjacent pile units are welded together, so that the pile units are fixedly connected.

Step four, installing the machine set: as shown in fig. 14, the machine base 9 and the hoisting machine unit 8 are installed at the position of the first bolt hole 3 arranged at the upper part of the steel pipe 1 by means of bolt connection; the base 9 is connected with the first bolt hole 3 on the upper part of the steel pipe 1 through a bolt, and the winch unit 8 is arranged on the base 9.

Step five, pile splicing: with reference to fig. 15 and 16, the crane vertically hangs a precast pile unit 7 to the upper part of the steel pipe 1, and connects the pile with the top end of the pile body in the steel pipe 1 by the flange 6.

Step six, placing a pressure frame: the specific method comprises the following steps:

after the fifth step, as shown in fig. 17, hoisting the pressure frame 10 to the upper end of the pile body by using a crane, and fixing the pressure frame to the upper end of the pile body by using bolts 14;

the pressure frame 10 is horizontally placed at the upper end of the pile body, a second bolt hole 12 on the pressure frame 10 is aligned with a bolt hole on the flange 6 at the upper end of the pile body, and the pressure frame 10 is fixed at the upper end of the pile body through a bolt 14.

Step seven, connecting the winch set and the pressure frame: as shown in fig. 23, two pressure frame ear plates 11 at two sides below the pressure frame 10 are connected with the hoisting units 8 at two sides of the upper part of the steel pipe 1 through steel strands 16;

during connection, the steel strand 16 passes through the ear plate hole 13 on the ear plate 11 of the pressure frame and then is closed to form a steel coil, and the hook 15 on the winch unit 8 locks the steel strand 16 on the pressure frame 10, so that connection between the winch unit 8 and the pressure frame 10 is realized.

Step eight, starting the winch set: as shown in fig. 24, the hoist unit 8 is connected to the power supply 17, and the power supply 17 supplies power to the hoist unit 8; switching on a power supply 17, starting the hoisting units 8 slowly and at a constant speed, so that the hoisting units 8 on the two sides of the upper part of the steel pipe pull the pressure frame 10 to move downwards at the same speed, and pressing the pile body into the soil body by the pressure frame 10 until the pile body is pressed into a set depth; in the process, the perpendicularity of the precast pile unit is monitored constantly;

step nine, disconnecting the unit from the pressure frame: as shown in fig. 25, after the pile body is pressed into the set depth, the part of the precast pile unit 7 at the uppermost end is higher than the top of the steel pipe 1; the power supply 17 is disconnected, the hook 15 is removed, the bolt 14 connecting the pressure frame 10 and the precast pile end flange 6 is removed, the crane lifts the pressure frame 10, and the connection between the winch unit 8 and the pressure frame 10 is disconnected, as shown in fig. 26.

Step ten, repeating the steps: and repeating the fifth step to the ninth step until all the precast pile units 7 are pressed into the steel pipe 1.

Eleven, pulling out the steel pipe and synchronously grouting, and the concrete steps are as follows:

11.1 with reference to fig. 27 and 28, the machine base 9 and the winch unit 8 on the steel pipe 1 are detached, and the mortar spray guns 19 are respectively placed in the grouting pipes 2;

11.2 as shown in fig. 28, the steel pipe 1 is slowly pulled out at a constant speed by a crane, and simultaneously, the vacancy of the steel pipe 1 after being pulled out is grouted.

11.3 after the steel pipe 1 is completely pulled out of the ground, stopping grouting after the steel pipe is grouted to be level with the ground, and finally detecting the verticality of the pile body to finish construction, as shown in figure 29.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Although the use of the term in the present text is used more often, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

The present invention is not limited to the above-mentioned preferred embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is made, and all the technical solutions identical or similar to the present application fall within the protection scope of the present invention.

Claims (7)

1. A self-balancing pressing-in construction device for a precast pile is characterized by comprising a steel pipe (1) inserted into a soil body, a fixing frame (5) and a pressure frame (10), wherein a grouting pipe (2) is arranged on the outer side of the steel pipe (1), two sides of the upper part of the steel pipe (1) are respectively provided with a machine base (9), and a winch unit (8) is arranged on the machine base (9); the pressure frame (10) is arranged at the upper end of a pile body in the steel pipe (1), the hoisting units (8) on two sides of the upper part of the steel pipe (1) are connected with two sides of the pressure frame (10), and the pressure frame (10) moves downwards under the traction of the hoisting units (8); the pile body is assembled by a prefabricated bottom pile (4) and a prefabricated pile unit (7), and the fixing frame (5) is used for temporarily fixing the prefabricated bottom pile (4) and the prefabricated pile unit (7).

2. The precast pile self-balancing press-in construction device according to claim 1, wherein the grouting pipes (2) are arranged along the axial direction of the steel pipe (1) and arranged outside the steel pipe (1) in an annular array; the upper end of the grouting pipe (2) is flush with the top end of the steel pipe (1), and the lower end of the grouting pipe (2) is flush with the bottom end of the steel pipe (1).

3. The precast pile self-balancing pressing-in construction device according to claim 1, wherein first bolt holes (3) are formed in two sides of the upper portion of the steel pipe (1), and the base (9) is installed at a position where the first bolt holes (3) are formed in the steel pipe (1) in a bolt connection manner.

4. The self-balancing precast pile press-in construction device according to claim 1, wherein the pressure frame (10) has a rectangular plate structure.

5. The precast pile self-balancing pressing-in construction device according to claim 1, wherein two sides below the pressure frame (10) are respectively provided with a pressure frame ear plate (11), and the pressure frame ear plates (11) are provided with ear plate holes (13); the pressure frame ear plates (11) on two sides below the pressure frame (10) are connected with the hoisting units (8) on two sides of the upper part of the steel pipe through steel strands (16).

6. The self-balancing precast pile press-in construction device according to claim 1, wherein the pressure frame (10) is provided with a second bolt hole (12), and the pressure frame (10) is connected with the flange (6) at the top end of the pile body through a bolt (14).

7. The self-balancing press-in construction device of the precast pile according to claim 1, wherein the fixing frame (5) comprises a hoop and a support rod connected to the hoop; when the prefabricated bottom pile (4) or the prefabricated pile unit (7) are fixed, the hoop is tightly held on the prefabricated bottom pile (4) or the prefabricated pile unit (7), and the lower end of the supporting rod is supported on the ground.

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