CN114134896A

CN114134896A - Grouting device and post-grouting process for post-grouting of PHC (prestressed high-strength concrete) tubular pile

Info

Publication number: CN114134896A
Application number: CN202111192808.0A
Authority: CN
Inventors: 王伟泽
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-03-04

Abstract

The invention provides a grouting device and a post-grouting process for post-grouting of a PHC (prestressed high-strength concrete) pipe pile, and relates to the technical field of building construction. A slip casting device for post-slip casting of PHC tubular piles comprises a pipe body and a slip casting plug, wherein the side wall of the pipe body is provided with a slip casting hole, two ends of the pipe body are respectively provided with a top plate and a bottom plate, and the top plate is provided with a slip casting hole communicated with the pipe body; wear to be equipped with the slip casting pipe that is used for the slip casting in the above-mentioned slip casting stopper, above-mentioned slip casting pipe cooperatees with above-mentioned grouting hole, develops back slip casting construction process through using this slip casting ware, can effectively improve the tubular pile bearing capacity, ensures engineering quality, and construction convenient and fast gets up helps improving the efficiency of construction. The post-grouting process comprises the steps of tubular pile installation and pile sinking grouting, and is simple in process flow, convenient and fast to construct, high in bearing capacity of the constructed tubular pile and good in application effect.

Description

Grouting device and post-grouting process for post-grouting of PHC (prestressed high-strength concrete) tubular pile

Technical Field

The invention relates to the technical field of building construction, in particular to a grouting device for post-grouting of a PHC (prestressed high-strength concrete) pipe pile and a post-grouting process of the PHC pipe pile.

Background

PHC tubular pile, namely prestressed high-strength concrete tubular pile. The hollow cylindrical concrete prefabricated member is prepared by adopting a pre-tensioning and pre-stressing centrifugal forming process and performing steam curing at 10 atmospheric pressures (about 1.0 Mpa) and 180 ℃ or so, has high strength and high single-pile bearing capacity, and is a common pile foundation in high-rise buildings. However, in a geological environment with gravel or pebbles in the bearing stratum, the effective length of the tubular pile is too long, and the tubular pile is easily inclined or even broken due to too large pressure, so that great limitation is brought to the application of the PHC tubular pile.

Disclosure of Invention

The invention aims to provide a grouting device for post grouting of a PHC tubular pile.

The invention also aims to provide a post-grouting process which is simple in process flow, convenient and quick to construct, high in bearing capacity of the constructed pipe pile and good in application effect.

The embodiment of the invention is realized by the following steps:

on one hand, the embodiment of the invention provides a grouting device for post-grouting of a PHC tubular pile, which comprises a pipe body and a grouting plug, wherein the side wall of the pipe body is provided with a grouting hole, two ends of the pipe body are respectively provided with a top plate and a bottom plate, and the top plate is provided with a grouting hole communicated with the pipe body; and a grouting pipe for grouting is arranged in the grouting plug in a penetrating manner, and the grouting pipe is matched with the grouting hole.

Further, in some embodiments of the present invention, a cavity is disposed in the grouting plug, and the grouting plug is provided with a water injection pipe communicated with the cavity.

Further, in some embodiments of the present invention, the outer sidewall of the pipe body is provided with a hole protecting plate for protecting the guniting hole.

Further, in some embodiments of the present invention, the inner diameter of the grout hole is greater than 3 mm.

Further, in some embodiments of the present invention, the number of the slurry spraying holes is not less than 4.

Further, in some embodiments of the present invention, the outer sidewall of the pipe body is provided with a stiffening rib along a length direction of the pipe body, and one end of the stiffening rib is connected to the top plate.

Further, in some embodiments of the present invention, the number of the above-mentioned stiffeners is not less than 4.

Further, in some embodiments of the present invention, a limit baffle is disposed on a side wall of the top plate away from the pipe body, the limit baffle is disposed around an edge of the top plate, a plane where the top plate is located is perpendicular to a plane where the limit baffle is located, and the top plate and the limit baffle define a pile slot for embedding the PHC pipe pile.

Further, in some embodiments of the present invention, the slip casting device is made of Q345 steel or high strength steel.

On the other hand, the embodiment of the invention also provides a post-grouting process, which comprises the following steps:

tubular pile installation: vertically placing the grouting device to a pile position, hoisting the PHC tubular pile to enable the bottom of the PHC tubular pile to be in butt joint with the grouting device and be connected with the top plate, and then sinking the pile downwards;

pile sinking and grouting: after the pile is sunk to the designed elevation, the grouting plug is put down to the bottom of the tubular pile from the center of the tubular pile, sealing is carried out through the grouting plug, and then grouting is carried out through the grouting pipe.

Compared with the prior art, the embodiment of the invention at least has the following advantages or beneficial effects:

aiming at the first aspect, the embodiment of the invention provides a grouting device for post-grouting of a PHC tubular pile, which comprises a pipe body and a grouting plug, wherein the side wall of the pipe body is provided with a grouting hole, two ends of the pipe body are respectively provided with a top plate and a bottom plate, and the top plate is provided with a grouting hole communicated with the pipe body; and a grouting pipe for grouting is arranged in the grouting plug in a penetrating manner, and the grouting pipe is matched with the grouting hole.

The grouting device for post-grouting of the PHC tubular pile comprises the pipe body and the grouting plug, and the side wall of the pipe body is provided with the grouting hole, so that in the actual use process, the pipe body can bear corresponding load in the pile sinking process, bear the pressure in the pile sinking process and the resistance borne by the transmission expansion head after grouting, and avoid accidents such as pile explosion and the like; the grout spraying holes can enable grout to diffuse around during grouting, soil at the bottom of the tubular pile is extruded by the grout, and spherical carriers are formed at the bottom of the tubular pile, so that bearing capacity of the tubular pile is enhanced. In addition, because the top plate and the bottom plate are respectively arranged at two ends of the pipe body, and the top plate is provided with a grouting hole communicated with the pipe body, the top plate and the bottom plate can transfer construction load and use load in the actual use process; during grouting, the grout can enter the pipe body from the grouting holes and then flow out from the grout spraying holes to perform grouting. Because it still includes above-mentioned slip casting stopper, and wear to be equipped with the slip casting pipe that is used for the slip casting in the above-mentioned slip casting stopper, at the in-process of practical use, after pile sinking is accomplished, put into the tubular pile and put into at the bottom of the tubular pile with the above-mentioned slip casting stopper that even has the slip casting pipe, seal through above-mentioned slip casting stopper, and then carry out the slip casting operation to prevent that the thick liquid from spilling over. By using the grouting device for post-grouting of the PHC tubular pile, the post-grouting process of the PHC tubular pile can be better developed, the grouting device can be used at any time, the construction time is saved, meanwhile, the bearing capacity of the pile can be effectively improved, and the engineering quality is ensured.

For the second aspect, an embodiment of the present invention further provides a post-grouting process, which includes the following steps:

The post-grouting process comprises the steps of vertically placing the grouting device to a pile position, hoisting the PHC tubular pile by using a hoisting machine, aligning the bottom of the PHC tubular pile to the grouting device, sinking the PHC tubular pile downwards into the grouting device to be in butt joint with the grouting device, and connecting the bottom of the PHC tubular pile with the top plate, wherein the hoisting process is strictly required to be free of rough operation, the hoisting process is strictly forbidden to drag the PHC tubular pile, the pile cannot swing greatly in the air after hoisting, the ground is ensured to be smooth before sinking the pile, and stones, concrete blocks and massive construction wastes cannot be generated; after confirming that the tubular pile is connected with the grouting device without errors, pile sinking can be started, and when the pile is sunk to the designed elevation, the grouting plug is sealed from the lower part of the center of the tubular pile to the bottom of the tubular pile, so that grout is prevented from overflowing during grouting; then grouting through the grouting pipe, wherein the grouting material is ordinary portland cement with PO42.5, and the water cement ratio is 0.45-0.65 for saturated soil; for unsaturated soil, the water-cement ratio is 0.7-0.9; and stopping grouting when the pure cement grouting amount reaches 75% of the design value, the grouting pressure reaches 1.5 times of the design grouting pressure and is maintained for more than 5min, or the pure cement grouting amount reaches 75% of the design value, and the pile top or the ground is obviously lifted by more than 3 mm. In addition, after the grouting is completed, maintenance is required for at least 15 days, preferably 28 days. The whole process flow is simple, the construction is convenient and quick, the bearing capacity of the constructed pipe pile is high, and the application effect is good.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is a sectional view of the grouting device for PHC pile post-grouting provided by the invention.

Icon: 1. a pipe body; 2. grouting plugs; 3. a guniting hole; 4. a grouting pipe; 5. a top plate; 6. a base plate; 7. a cavity; 8. a water injection pipe; 9. protecting the hole plate; 10. a stiffening rib; 11. a limit baffle; 100. PHC tubular pile.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that if the terms "center", "vertical", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the products of the present invention are usually put into use, the description is merely for convenience of describing the present invention and simplifying the description, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, the present invention should not be construed as being limited.

Furthermore, the term "vertical" and the like, if present, does not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. Such as "vertical" simply means that its direction is more horizontally vertical than "horizontal," and does not mean that the structure must be perfectly vertical, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and the like are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

Referring to fig. 1, an embodiment of the present invention provides a grouting device for post-grouting of a PHC tubular pile, including a pipe body 1 and a grouting plug 2, wherein a sidewall of the pipe body 1 is provided with a grouting hole 3, two ends of the pipe body 1 are respectively provided with a top plate 5 and a bottom plate 6, and the top plate 5 is provided with a grouting hole communicated with the pipe body 1; and a grouting pipe 4 for grouting is arranged in the grouting plug 2 in a penetrating manner, and the grouting pipe 4 is matched with the grouting hole.

In this embodiment, because it includes the pipe body 1 and the grouting plug 2, and the sidewall of the pipe body 1 is provided with the grouting hole 3, in the actual use process, the pipe body 1 can bear corresponding load in the pile sinking process, bear the pressure in the pile sinking process and the resistance borne by the transmission enlarged head after grouting, and avoid accidents such as pile explosion; the grout spraying holes 3 can enable grout to diffuse around during grouting, soil at the bottom of the tubular pile is extruded by the grout, and spherical carriers are formed at the bottom of the tubular pile, so that bearing capacity of the tubular pile is enhanced. Since the top plate 5 and the bottom plate 6 are respectively disposed at both ends of the pipe body 1, and the top plate 5 is provided with a grouting hole communicated with the pipe body 1, the top plate 5 and the bottom plate 6 can transmit construction load and use load in the process of actual use; during grouting, the grout can enter the pipe body 1 through the grouting holes and then flow out of the grout spraying holes 3 for grouting. Because it still includes above-mentioned slip casting stopper 2, and wear to be equipped with the slip casting pipe 4 that is used for the slip casting in above-mentioned slip casting stopper 2, at the in-process of practical use, after pile sinking is accomplished, put into the tubular pile and put into at the bottom of the tubular pile with above-mentioned slip casting stopper 2 that even has slip casting pipe 4, seal through above-mentioned slip casting stopper 2, and then carry out the slip casting operation to prevent that the thick liquid from spilling over. By using the grouting device for post-grouting of the PHC tubular pile, the post-grouting process of the PHC tubular pile can be better developed, the grouting device can be used at any time, the construction time is saved, meanwhile, the bearing capacity of the pile can be effectively improved, and the engineering quality is ensured.

Example 2

Referring to fig. 1, in some embodiments of the present invention, a cavity 7 is disposed in the grouting plug 2, and the grouting plug 2 is provided with a water injection pipe 8 communicating with the cavity 7.

In this embodiment, because above-mentioned cavity 7 is provided with in above-mentioned slip casting stopper 2, and above-mentioned slip casting stopper 2 is provided with above-mentioned water injection pipe 8 with above-mentioned cavity 7 intercommunication, at the in-process of in-service use, place into the PHC tubular pile 100 bottom with above-mentioned slip casting stopper 2 after, can make above-mentioned slip casting stopper 2 inflation through pouring into in above-mentioned cavity 7 to realize sealed effect, prevent to spill over at the in-process thick liquid of slip casting, so that can accomplish the slip casting operation smoothly, more be favorable to going on of construction. The grouting plug 2 may be made of an elastic material such as rubber.

Example 3

Referring to fig. 1, in some embodiments of the present invention, the outer side wall of the pipe body 1 is provided with a hole-protecting plate 9 for protecting the guniting hole 3.

In this embodiment, by providing the hole-protecting plate 9, the pressure of the soil around the grout-injecting hole 3 can be effectively reduced, so that the grout can smoothly pass through the grout-injecting hole 3 during grouting, and the construction and use are facilitated.

Example 4

Referring to fig. 1, in some embodiments of the present invention, the inner diameter of the grout hole 3 is greater than 3 mm.

In this embodiment, through the internal diameter to above-mentioned whitewashing hole 3 restriction, can effectively improve slip casting efficiency, more be favorable to going on of construction.

Example 5

Referring to fig. 1, in some embodiments of the present invention, the number of the slurry spraying holes 3 is not less than 4.

In this embodiment, through restricting the quantity to above-mentioned whitewashing hole 3, can further promote slip casting efficiency, also can improve construction quality simultaneously, be favorable to improving the tubular pile bearing capacity after the construction, more be favorable to going on of construction.

Example 6

Referring to fig. 1, in some embodiments of the present invention, a stiffening rib 10 is disposed on an outer side wall of the pipe body 1 along a length direction of the pipe body 1, and one end of the stiffening rib 10 is connected to the top plate 5.

In this embodiment, by providing the stiffening rib 10, the stiffening rib 10 and the pipe body 1 can be matched with each other, so as to commonly bear the pressure in the pile sinking process and the end resistance and the side resistance borne by the transmission expansion head after the grouting is completed, and simultaneously improve the local stability of the pipe body 1, thereby facilitating further improvement of the construction quality and the strength and the bearing capacity of the pipe pile.

Example 7

Referring to fig. 1, in some embodiments of the present invention, the number of the stiffening ribs 10 is not less than 4.

In this embodiment, through setting up 4 at least above-mentioned stiffening ribs 10, can be more abundant undertake the pressure of pile sinking in-process and transmit end resistance and the side resistance that the enlarged footing undertakes after the slip casting is accomplished, improve the local stability of above-mentioned body 1 to better improvement construction quality and tubular pile intensity and tubular pile bearing capacity.

Example 8

Referring to fig. 1, in some embodiments of the present invention, a side wall of the top plate 5 away from the tube body 1 is provided with a limit baffle 11, the limit baffle 11 is disposed around an edge of the top plate 5, a plane of the top plate 5 is perpendicular to a plane of the limit baffle 11, and the top plate 5 and the limit baffle 11 together define a pile slot for the PHC pile 100 to be inserted into.

In this embodiment, the limiting baffle 11 is provided, and the top plate 5 and the limiting baffle 11 together define and form a pile groove for embedding the PHC pile 100, in an actual use process, when sinking the pile, the bottom end of the PHC pile 100 is embedded into the pile groove, so that the bottom of the PHC pile 100 abuts against the top plate 5, and then the pile sinking is performed; through utilizing above-mentioned limit baffle 11, can prevent to take place the skew at the in-process PHC tubular pile 100 of sinking, ensure going on smoothly of sinking the pile operation, use convenient and fast, need not to carry out complicated operations such as welding, help further promoting the efficiency of construction.

Example 9

Referring to fig. 1, in some embodiments of the present invention, the grouting device is made of Q345 steel or high strength steel.

Make above-mentioned slip casting ware through using Q325 steel or high strength steel, can further promote the intensity performance of above-mentioned slip casting ware, promote the quality of above-mentioned slip casting ware to further ensure construction quality, and then promote the intensity performance and the bearing capacity of construction back tubular pile, more be favorable to the construction to use.

Example 10

Referring to fig. 1, an embodiment of the present invention further provides a post-grouting process, which includes the following steps:

tubular pile installation: vertically placing the grouting device to a pile position, hoisting the PHC tubular pile 100 to enable the bottom of the PHC tubular pile 100 to be in butt joint with the grouting device and be connected with the top plate 5, and then sinking the pile downwards;

pile sinking and grouting: after sinking the stake to the design elevation, transfer above-mentioned slip casting stopper 2 to the tubular pile bottom from the tubular pile center, seal through above-mentioned slip casting stopper 2, then carry out the slip casting through above-mentioned slip casting pipe 4.

In this embodiment, the grouting device is vertically placed to a pile location, and then the PHC tubular pile 100 is lifted by a lifting machine, so that the bottom of the PHC tubular pile 100 is aligned with the grouting device and is sunk downwards into the grouting device to be butted with the grouting device, so that the bottom of the PHC tubular pile 100 is connected with the top plate 5, attention needs to be paid to strict requirements in the lifting process so as not to perform rough operation, the pile is strictly lifted by dragging, the pile cannot swing greatly in the air after lifting, the ground is guaranteed to be flat before pile sinking, and stones, concrete blocks and massive construction waste cannot be generated; after confirming that the tubular pile is connected with the grouting device without errors, pile sinking can be started, and when the pile is sunk to the designed elevation, the grouting plug 2 is sealed from the lower part of the center of the tubular pile to the bottom of the tubular pile, so that grout is prevented from overflowing during grouting; then grouting through the grouting pipe 4, wherein the grouting material is ordinary portland cement with PO42.5, and the water cement ratio is 0.45-0.65 for saturated soil; for unsaturated soil, the water-cement ratio is 0.7-0.9; and stopping grouting when the pure cement grouting amount reaches 75% of the design value, the grouting pressure reaches 1.5 times of the design grouting pressure and is maintained for more than 5min, or the pure cement grouting amount reaches 75% of the design value, and the pile top or the ground is obviously lifted by more than 3 mm. In addition, after the grouting is completed, maintenance is required for at least 15 days, preferably 28 days. The whole process flow is simple, the construction is convenient and quick, the bearing capacity of the constructed pipe pile is high, and the application effect is good.

In summary, embodiments of the present invention provide a grouting device and a post-grouting process for post-grouting of a PHC tubular pile, in the grouting device, because the grouting device includes the pipe body 1 and the grouting plug 2, and the side wall of the pipe body 1 is provided with the grouting hole 3, in an actual use process, the pipe body 1 can bear a corresponding load in a pile sinking process, bear pressure in the pile sinking process and resistance borne by a transmission expansion head after grouting, and avoid accidents such as pile burst; the grout spraying holes 3 can enable grout to diffuse around during grouting, soil at the bottom of the tubular pile is extruded by the grout, and spherical carriers are formed at the bottom of the tubular pile, so that bearing capacity of the tubular pile is enhanced. Since the top plate 5 and the bottom plate 6 are respectively disposed at both ends of the pipe body 1, and the top plate 5 is provided with a grouting hole communicated with the pipe body 1, the top plate 5 and the bottom plate 6 can transmit construction load and use load in the process of actual use; during grouting, the grout can enter the pipe body 1 through the grouting holes and then flow out of the grout spraying holes 3 for grouting. Because it still includes above-mentioned slip casting stopper 2, and wear to be equipped with the slip casting pipe 4 that is used for the slip casting in above-mentioned slip casting stopper 2, at the in-process of practical use, after pile sinking is accomplished, put into the tubular pile and put into at the bottom of the tubular pile with above-mentioned slip casting stopper 2 that even has slip casting pipe 4, seal through above-mentioned slip casting stopper 2, and then carry out the slip casting operation to prevent that the thick liquid from spilling over. By using the grouting device for post-grouting of the PHC tubular pile, a post-grouting process of the PHC tubular pile can be better developed and can be taken at any time, so that the construction time is saved, the bearing capacity of the pile can be effectively improved, and the engineering quality is ensured;

in the post-grouting process, the grouting device is vertically placed to a pile position, then the PHC tubular pile 100 is hoisted by a hoisting machine, the bottom of the PHC tubular pile 100 is aligned with the grouting device and is sunk downwards into the grouting device to be butted with the grouting device, the bottom of the PHC tubular pile 100 is connected with the top plate 5, the strict requirement on rough operation in the hoisting process needs to be paid attention to, the pile is strictly prohibited to be dragged to be hoisted, the pile cannot be greatly swung in the air after being hoisted, the site is ensured to be flat before the pile is sunk, and stones, concrete blocks and large building wastes cannot be generated; after confirming that the tubular pile is connected with the grouting device without errors, pile sinking can be started, and when the pile is sunk to the designed elevation, the grouting plug 2 is sealed from the lower part of the center of the tubular pile to the bottom of the tubular pile, so that grout is prevented from overflowing during grouting; then grouting through the grouting pipe 4, wherein the grouting material is ordinary portland cement with PO42.5, and the water cement ratio is 0.45-0.65 for saturated soil; for unsaturated soil, the water-cement ratio is 0.7-0.9; and stopping grouting when the pure cement grouting amount reaches 75% of the design value, the grouting pressure reaches 1.5 times of the design grouting pressure and is maintained for more than 5min, or the pure cement grouting amount reaches 75% of the design value, and the pile top or the ground is obviously lifted by more than 3 mm. In addition, after the grouting is completed, maintenance is required for at least 15 days, preferably 28 days. The whole process flow is simple, the construction is convenient and quick, the bearing capacity of the constructed pipe pile is high, and the application effect is good.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The grouting device for post-grouting of the PHC tubular pile is characterized by comprising a pipe body and a grouting plug, wherein a grouting hole is formed in the side wall of the pipe body, a top plate and a bottom plate are respectively arranged at two ends of the pipe body, and the top plate is provided with a grouting hole communicated with the pipe body; and a grouting pipe for grouting is arranged in the grouting plug in a penetrating manner, and the grouting pipe is matched with the grouting hole.

2. The grouting device for PHC tubular pile post-grouting according to claim 1, characterized in that a cavity is arranged in the grouting plug, and the grouting plug is provided with a water injection pipe communicated with the cavity.

3. The grouting device for PHC tubular pile post-grouting according to claim 1, wherein the outer side wall of the pipe body is provided with a hole-protecting plate for protecting the grout-spraying holes.

4. The grouting device for post-grouting of a PHC pile according to claim 1, wherein the inner diameter of the grout spraying hole is greater than 3 mm.

5. The grouting device for PHC pile post-grouting according to claim 4, wherein the number of the grout spraying holes is not less than 4.

6. The grouting device for PHC tubular pile post-grouting according to claim 1, wherein a stiffening rib is arranged on the outer side wall of the pipe body along the length direction of the pipe body, and one end of the stiffening rib is connected with the top plate.

7. The grouting device for PHC pile post-grouting according to claim 6, wherein the number of the stiffening ribs is not less than 4.

8. The grouting device for PHC tubular pile post-grouting according to claim 1, characterized in that a side wall of the top plate, which is far away from the pipe body, is provided with a limit baffle, the limit baffle is arranged around the edge of the top plate, the plane where the top plate is located is perpendicular to the plane where the limit baffle is located, and the top plate and the limit baffle jointly define a pile groove for embedding the PHC tubular pile.

9. The grouting device for post-grouting of a PHC pile according to claim 1, wherein the grouting device is made of Q345 steel or high-strength steel.

10. A post-grouting process using the grouter for PHC pile post-grouting according to any one of claims 1 to 9, comprising the steps of:

tubular pile installation: vertically placing the grouting device to a pile position, lifting the PHC tubular pile to enable the bottom of the PHC tubular pile to be in butt joint with the grouting device and be connected with the top plate, and then sinking the pile downwards;

pile sinking and grouting: after pile sinking reaches the design elevation, will the slip casting stopper is put PHC tubular pile bottom from the tubular pile center down, through the slip casting stopper is sealed, then passes through the slip casting pipe carries out the slip casting.