Bag squeezing and expanding pile

Abstract

The utility model discloses a bag squeezing and expanding pile. The bag squeezing and expanding pile comprises a prefabricated pipe pile and a plurality of slurry bundling bags fixed to the side wall of the prefabricated pipe pile. After the prefabricated pipe pile is lowered into a pile hole of a foundation, concrete slurry is injected into the slurry binding bag, so that the slurry binding bag becomes an annular expansion ring body surrounding the prefabricated pipe pile and is embedded into the foundation. According to the bag squeezing and expanding pile, the nodes are additionally arranged on the pile body, so that the compression resistance and the pulling resistance of the pile body are achieved; meanwhile, the in-column water accumulation steel pipe is additionally arranged at the top of the pile to control the height of underground water, and the buoyancy of the pile is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of precast piles, and particularly relates to a bag extruded pile. BACKGROUND

[0002] For the underground water level is higher, water resources are rich, the permeability coefficient of rock-soil is larger, the water buoyancy makes the underground structure bear the vertical upward load, reduces the foundation bearing capacity, and increases the risk of structural instability; with the increase of the excavation depth of the foundation pit, the problem is more prominent, which seriously affects the construction and operation safety of the structure.

[0003] The uplift pile relies on the side friction of the pile body (equal-section uplift pile) and the resistance of the enlarged head (enlarged bottom uplift pile) to bear the uplift load at the top of the pile, improve the safety of the structure, and reduce the floating amount of the foundation. At present, it has become an important prevention and control measure for the anti-floating of large underground space structure, wind resistance of super high building and uplift resistance.

[0004] Generally, the equal-section pile type completely relies on the side friction of the pile to resist the vertical load. When the vertical tension exceeds the side friction of the pile, the pile body loses the ability to resist uplift, and at this time, the soil around the pile does not fully play its role, and the pile itself also does not reach the ultimate bearing capacity, so a certain degree of resource waste is caused.

[0005] The enlarged bottom pile, that is, the bottom of the pile is expanded outward to the surrounding soil to form a space. Although this kind of enlarged bottom pile increases the bearing capacity of the pile end, the bearing capacity of the pile side is not significantly improved. CONTENT OF THE UTILITY MODEL

[0006] The purpose of the application is to overcome the problems of the prior art. A bag extruded pile is disclosed. The bag extruded pile realizes the compression resistance and uplift resistance of the pile body by increasing the nodes on the pile body.

[0007] The purpose of the application is achieved by the following technical scheme:

[0008] A bag extruded pile, comprising a precast pipe pile and a plurality of bundled slurry bags fixed to the side wall of the precast pipe pile;

[0009] After the precast pipe pile is lowered into the pile hole of the foundation, concrete slurry is injected into the bundled slurry bags, so that the bundled slurry bags become a circular annular expansion ring body around the precast pipe pile and are embedded in the foundation.

[0010] According to a preferred embodiment, a slurry pipe is arranged between the central cavity of the precast pipe pile and the bundled slurry bags, and a sleeve valve grouting pipe is arranged in the central cavity of the precast pipe pile,

[0011] The central cavity of the precast pipe pile is grouted through the sleeve valve grouting pipe, and when the grouting of the central cavity is completed, the slurry is injected into the bundled slurry bags through the slurry pipe.

[0012] According to a preferred embodiment, the grout bag is grouted through a pile side grouting pipe arranged outside the precast pile.

[0013] According to a preferred embodiment, the top end of the bag extruded pile is provided with a column water accumulation steel pipe arranged in the top end of the central cavity of the precast pile,

[0014] The bottom end of the column water accumulation steel pipe is a sealed structure, and the column water accumulation steel pipe is connected with the space outside the bag extruded pile through a water inlet hole arranged on the sidewall of the precast pile, for collecting groundwater outside the bag extruded pile.

[0015] According to a preferred embodiment, a dewatering pipe is further arranged in the column water accumulation steel pipe, for draining water in the column water accumulation steel pipe.

[0016] According to a preferred embodiment, a water level monitor is arranged in the column water accumulation steel pipe, for monitoring the water level in the column water accumulation steel pipe.

[0017] According to a preferred embodiment, a water storage tank is further arranged near the bag extruded pile, the water storage tank is connected with the column water accumulation steel pipes in the bag extruded piles through the dewatering pipes, and the bottom of the water storage tank is 2-3m lower than the bottom of the column water accumulation steel pipe.

[0018] According to a preferred embodiment, the bottom end of the precast pile is provided with a head or a cross anchor hook.

[0019] According to a preferred embodiment, the cross anchor hook comprises a connecting rod, a cross-shaped frame body and a channel steel, and the cross-shaped frame body is connected and fixed to the bottom end of the precast pile through the connecting rod.

[0020] Each end of the cross-shaped frame body is connected with a channel steel through a rotating shaft; during the pile driving process, the channel steels are bent and arranged close to the connecting rod, and when reaching the bottom side of the pile hole, the channel steels are unfolded through reverse pile pulling to form a cross-shaped enlarged head structure.

[0021] According to a preferred embodiment, the top side and the bottom side of the grout bag are respectively provided with fixing rings, for fixing the top edge and the bottom edge of the grout bag to the precast pile.

[0022] When the precast pile is a precast cement pile, an annular groove node is arranged on the sidewall of the precast cement pile, the edge of the grout bag is press-fitted in the groove node through the fixing ring, and the fixing ring is fixed to the precast pile through a rivet;

[0023] When the prefabricated pipe pile is a prefabricated steel pipe pile, the prefabricated steel pipe pile is provided with vertically adjacent convex nodes on the side wall, the edge of the grouting bag is pressed into the groove structure formed between the two convex nodes through a fixing ring, and the fixing ring is fixed on the prefabricated pipe pile through a rivet.

[0024] The foregoing main scheme of the application and each further selected scheme thereof can be freely combined to form multiple schemes, which are all the schemes that can be adopted and claimed by the application. A person skilled in the art can understand that there are multiple combinations according to the prior art and common knowledge after understanding the schemes of the application, which are all the technical schemes claimed by the application, and are not listed here.

[0025] The beneficial effects of the application are as follows:

[0026] The bag extruded pile of the application realizes the compression resistance and uplift resistance of the pile body by adding nodes to the pile body; meanwhile, the height of underground water is controlled and the buoyancy of the pile is reduced by adding a column water-accumulating steel pipe to the top of the pile. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is an embodiment structure of the bag extruded pile of the application;

[0028] Fig. 2 is an embodiment structure of the bag extruded pile of the application;

[0029] Fig. 3 is an embodiment structure of the bag extruded pile of the application;

[0030] Fig. 4 is an embodiment structure of the bag extruded pile of the application;

[0031] Fig. 5 is an embodiment structure of the bag extruded pile of the application;

[0032] Fig. 6 is an embodiment structure of the bag extruded pile of the application;

[0033] Fig. 7 is a fixing structure of the grouting bag of the application;

[0034] Fig. 8 is a fixing structure of the grouting bag of the application;

[0035] Fig. 9 is a structure schematic diagram of the cross anchor hook of the application;

[0036] Fig. 10 is a drainage process schematic diagram of the bag extruded pile of the application;

[0037] Fig. 11 is a pile forming process schematic diagram of the bag extruded pile of the application;

[0038] Among them, 1-precast pipe pile, 2-steel pipe for water accumulation inside the column, 3-grout bag, 4-water level monitor, 5-water inlet hole, 6-dewatering pipe, 7-grout pipe, 8-sleeve valve grouting pipe, 9-end, 10-fixing ring, 11-cross anchor hook, 12-pile side grouting pipe, 101-precast cement pile, 102-groove node, 103-rivet, 104-precast steel pipe pile, 105-protruding node, 110-connecting rod, 111-frame, 112-rotating shaft, 113-channel steel. Detailed Implementation

[0039] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present application, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In addition, it is pointed out that in the present application, unless the specific structure, connection relationship, positional relationship, power source relationship, etc. are specifically written, the structure, connection relationship, positional relationship, power source relationship, etc. involved in the present application are all known by those skilled in the art on the basis of the prior art without creative labor.

[0045] Embodiment 1

[0046] Reference Figs. 1 to 11 As shown in the figure, the present application discloses a kind of bag extrusion pile, the bag extrusion pile includes prefabricated pipe pile 1 and the several bundles of slurry bag 3 fixed to the side wall of prefabricated pipe pile 1;After prefabricated pipe pile 1 is lowered into the pile hole of foundation, by injecting concrete slurry into the bundle of slurry bag 3, so that the bundle of slurry bag 3 becomes the circular ring body of expansion around prefabricated pipe pile 1, and is embedded in the setting of foundation, to increase the compression, pullout force of bag extrusion pile.

[0047] Preferably, as shown in the figure Figs. 1 to 3 As shown in the figure, the center cavity of the prefabricated pipe pile 1 is provided with a slurry pipe 7 between the bundle of slurry bag 3, and the center cavity of the prefabricated pipe pile 1 is provided with a sleeve valve grouting pipe 8, the center cavity grouting of the prefabricated pipe pile 1 is completed through the sleeve valve grouting pipe 8, and the slurry is injected into the bundle of slurry bag 3 through the slurry pipe 7 under the action of pressure when the center cavity grouting is completed.

[0048] Preferably, as shown in the figure Figs. 4 to 6 As shown in the figure, the bundle of slurry bag 3 is completed by the pile side grouting pipe 12 arranged on the outer side of prefabricated pipe pile 1.

[0049] Preferably, the top end of the bag extrusion pile is provided with a column water accumulation steel pipe 2, the column water accumulation steel pipe 2 is arranged at the top end of the center cavity of prefabricated pipe pile 1, the bottom end of the column water accumulation steel pipe 2 is a sealing structure, and the column water accumulation steel pipe 2 is communicated with the space outside the bag extrusion pile through the water inlet hole 5 arranged on the side wall of prefabricated pipe pile 1, for collecting groundwater outside the bag extrusion pile.

[0050] Further, the column water accumulation steel pipe 2 is also provided with a dewatering pipeline 6 for draining water in the column water accumulation steel pipe 2. And the column water accumulation steel pipe 2 is provided with a water level monitor 4 for completing water level monitoring in the column water accumulation steel pipe 2.

[0051] Further, the water storage tank is connected with the column water storage steel pipe 2 in each bag extruding pile through the precipitation pipeline 6, and the bottom of the water storage tank is 2-3m lower than the bottom of the column water storage steel pipe 2. In this way, if the column water storage steel pipe accumulates water, the water can be removed through the siphon effect. The water level detector is arranged in the column water storage steel pipe to detect the water level of the column water storage steel pipe. The water is removed through the siphon effect in normal times, and when the water level reaches a certain level, the water level detector gives an early warning, and then the water pump is automatically started to remove the water passively, so as to stabilize the water level of the underground water.

[0052] Preferably, the bottom end of the prefabricated pipe pile 1 is provided with a head 9 or a cross anchor hook 11. Further, the cross anchor hook 11 comprises a connecting rod 110, a cross-shaped frame body 111 and a channel steel 113, the cross-shaped frame body 111 is connected and fixed to the bottom end of the prefabricated pipe pile 1 through the connecting rod 110, each end of the cross-shaped frame body 111 is connected with a channel steel 113 through a rotating shaft 112, and during the pile driving process, each channel steel 113 is bent and arranged close to the connecting rod 110, and when reaching the bottom side of the pile hole, each channel steel 113 is unfolded through reverse pile pulling to form a cross-shaped enlarged head structure.

[0053] Preferably, the top side and the bottom side of the grout bag 3 are respectively provided with a fixing ring 10 for fixing the top edge and the bottom edge of the grout bag 3 to the prefabricated pipe pile 1.

[0054] Further, when the prefabricated pipe pile 1 is a prefabricated cement pile 101, the prefabricated cement pile 101 is provided with an annular groove node 102 on the side wall, the edge of the grout bag 3 is press-fitted into the groove node 102 through the fixing ring 10, and the fixing ring 10 is fixed to the prefabricated pipe pile 1 through the rivet 103. Thus, the fixing stability of the grout bag 3 is increased through the groove node 102.

[0055] Further, when the prefabricated pipe pile 1 is a prefabricated steel pipe pile 104, the prefabricated steel pipe pile 104 is provided with vertically adjacent protruding nodes 105 on the side wall, the edge of the grout bag 3 is press-fitted into the groove structure formed between the two protruding nodes 105 through the fixing ring 10, and the fixing ring 10 is fixed to the prefabricated pipe pile 1 through the rivet 103. Thus, the fixing stability of the grout bag 3 is increased through the protruding nodes 105.

[0056] The bag extruding pile of the application realizes the compression resistance and uplift resistance of the pile body by increasing the nodes on the pile body, and controls the height of the underground water and reduces the buoyancy of the pile by increasing the column water storage steel pipe on the top of the pile.

[0057] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A type of bag-type expansion pile, characterized in that, The bag-filled expansion pile includes a precast pipe pile (1) and several bundled grout bags (3) fixed to the side wall of the precast pipe pile (1); After the precast pipe pile (1) is lowered into the pile hole of the foundation, concrete grout is injected into the grout bag (3) so that the grout bag (3) becomes a circular expansion ring around the precast pipe pile (1) and is embedded in the foundation.

2. The bag-type expansion pile as described in claim 1, characterized in that, A grout pipe (7) is provided between the central cavity of the precast pipe pile (1) and the grout bag (3), and a sleeve valve grouting pipe (8) is provided in the central cavity of the precast pipe pile (1). Grouting of the central cavity of the precast pipe pile (1) is completed through the sleeve valve grouting pipe (8), and the grout is injected into the grout bag (3) through the grout pipe (7) when the grouting of the central cavity is completed.

3. The bag-type expansion pile as described in claim 1, characterized in that, The grout bag (3) is grouted via the pile side grouting pipe (12) located on the outside of the precast pipe pile (1).

4. The bag-type expansion pile as described in claim 1, characterized in that, The top of the bag-shaped expansion pile is equipped with an internal water-collecting steel pipe (2), which is located at the top of the central cavity of the precast pipe pile (1). The bottom end of the water-collecting steel pipe (2) inside the column is a sealed structure, and the water-collecting steel pipe (2) inside the column is connected to the space outside the bag-filled expansion pile through the water inlet hole (5) on the side wall of the precast pipe pile (1), so as to collect the groundwater outside the bag-filled expansion pile.

5. The bag-type expansion pile as described in claim 4, characterized in that, The column water-accumulating steel pipe (2) is also equipped with a dewatering pipe (6) for draining the water inside the column water-accumulating steel pipe (2).

6. The bag-type expansion pile as described in claim 5, characterized in that, The water level monitor (4) is installed inside the water-accumulating steel pipe (2) in the column to monitor the water level inside the water-accumulating steel pipe (2).

7. The bag-type expansion pile as described in claim 5, characterized in that, A water storage tank is also provided near the bag-shaped expansion pile. The water storage tank is connected to the water-accumulating steel pipe (2) inside each bag-shaped expansion pile via a dewatering pipe (6). The bottom level of the water storage tank is 2-3m lower than the bottom of the water-accumulating steel pipe (2).

8. The bag-type expansion pile as described in claim 1, characterized in that, The precast pipe pile (1) is provided with an end cap (9) or a cross anchor hook (11) at the bottom end.

9. The bag-type expansion pile as described in claim 8, characterized in that, The cross anchor hook (11) includes: a connecting rod (110), a cross-shaped frame (111) and a channel steel (113), wherein the cross-shaped frame (111) is connected and fixed to the bottom end of the precast pipe pile (1) via the connecting rod (110); Each end of the cross-shaped frame (111) is connected to a channel steel (113) via a pivot (112); during the pile driving process, each channel steel (113) is bent and positioned close to the connecting rod (110). When it reaches the bottom of the pile hole, the channel steel (113) is unfolded by reverse pile pulling to form a cross-shaped enlarged head structure.

10. The bag-type expansion pile as described in claim 1, characterized in that, The top and bottom sides of the grout bag (3) are respectively provided with fixing rings (10) to fix the top and bottom edges of the grout bag (3) to the precast pipe pile (1); When the precast pipe pile (1) is a precast cement pile (101), the side wall of the precast cement pile (101) is provided with an annular groove node (102), the edge of the grout bag (3) is pressed into the groove node (102) by a fixing ring (10), and the fixing ring (10) is fixed to the precast pipe pile (1) by a rivet (103); When the precast pipe pile (1) is a precast steel pipe pile (104), the precast steel pipe pile (104) has vertically adjacent protruding nodes (105) on its side wall. The edge of the grout bag (3) is pressed into the groove structure formed between the two protruding nodes (105) by a fixing ring (10). The fixing ring (10) is fixed to the precast pipe pile (1) by a rivet (103).

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