Waterproof curtain and foundation pit system

Abstract

The utility model discloses a kind of water-stop curtain and foundation pit system, water-stop curtain includes: multiple mixing piles, sequentially set, for being set around in the four around of to-be-excavated foundation pit, two mixing piles located at head and tail ends are spaced and oppositely set, wherein, define the mixing pile of head end as head end mixing pile, define the mixing pile of tail end as tail end mixing pile, head end mixing pile is equipped with the jackplug of the top of head end mixing pile downward extension, jackplug has the vertical opening of the side of head end mixing pile close to tail end mixing pile through;First water-stop stake, it is inserted in tail end mixing pile, and first water-stop stake has first water-stop part, first water-stop part exposes in the side of tail end mixing pile close to head end mixing pile;Second water-stop stake, it is inserted in jackplug, second water-stop stake has second water-stop part, second water-stop part is stretched to the side of head end mixing pile close to tail end mixing pile by vertical opening, second water-stop part and first water-stop part are buckled and form water-stop structure.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit water-stopping technology, and in particular to a water-stopping curtain and foundation pit system. Background Technology

[0002] like Figure 1 As shown, in areas with high groundwater levels, a water-stop curtain needs to be installed before excavating the foundation pit. Mixing piles are a commonly used water-stopping measure. During the construction of the mixing piles, the work proceeds forward along the perimeter of the foundation pit starting with the first pile. By the time the last mixing pile is completed, the first mixing pile has usually reached a high strength. Since mixing piles must overlap to achieve a water-stopping effect, it is no longer possible to use mixing piles between the first and last mixing piles to create an overlapping and sealed water-stop curtain.

[0003] like Figure 1 , Figure 2 As shown in the related technology, the solution to this problem is to add 1 to 2 sealing mixing piles 130 after the first and last mixing piles (first mixing pile 110 and last mixing pile 120) to seal the water-stop curtain. However, many engineering practices have shown that this measure is not effective. Water leakage usually occurs at the connection of the two sealing mixing piles 130 (the sealing mixing pile 130 can only be attached to the first mixing pile 110 and cannot be overlapped), which has an adverse effect on the construction. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a water-stop curtain that can improve its water-stopping effect.

[0005] This utility model also proposes a foundation pit system with the above-mentioned water-stop curtain.

[0006] According to a first aspect of the present invention, a water-stopping curtain includes: a plurality of mixing piles, which are arranged sequentially to surround a foundation pit to be excavated. Two mixing piles located at the beginning and end of the pit are spaced apart and arranged opposite each other. The mixing pile at the beginning is defined as the beginning mixing pile, and the mixing pile at the end is defined as the end mixing pile. The beginning mixing pile has an insertion hole extending downward from the top of the beginning mixing pile. The insertion hole has a vertical opening penetrating the beginning mixing pile on the side near the end mixing pile. A first water-stopping pile is inserted into the end mixing pile and has a first water-stopping part that protrudes from the side of the end mixing pile near the beginning mixing pile. A second water-stopping pile is inserted into the insertion hole and has a second water-stopping part that extends through the vertical opening to the side of the beginning mixing pile near the end mixing pile. The second water-stopping part is engaged with the first water-stopping part to form a water-stopping structure.

[0007] The water-stop curtain according to the embodiments of this utility model has at least the following beneficial effects:

[0008] In this utility model's water-stop curtain, the second water-stop part is interlocked with the first water-stop part to reduce the risk of the first and second water-stop piles separating. Simultaneously, the interlocking of the second and first water-stop parts creates a sealed water-stop structure between the first and last mixing piles. This improves the sealing performance between the first and last mixing piles, thereby enhancing the water-stopping effect.

[0009] According to some embodiments of the present invention, a sealing member is filled between the hole wall of the insertion hole and the second water-stopping pile.

[0010] According to some embodiments of the present invention, the second water-stopping pile includes a pile body and a grouting assembly disposed in the pile body. The side wall of the pile body is provided with a grouting hole, and the grouting assembly is provided with a grouting channel. The top of the grouting channel extends to the top of the pile body, and the grouting channel is also connected to the grouting hole.

[0011] According to some embodiments of the present invention, the grouting assembly includes a grouting pipe and a grouting ring. The grouting pipe extends vertically and is disposed within the pile body, and the grouting ring is disposed inside the pile body and communicates with the bottom of the grouting pipe.

[0012] The sidewall of the pile body is provided with a plurality of grouting holes spaced apart along the circumference of the pile body, and the grouting ring is provided with a plurality of outlets respectively communicating with the plurality of grouting holes.

[0013] According to some embodiments of the present invention, a plurality of grouting holes are arranged around the grouting ring, a plurality of outlets are opened on the outer side wall of the grouting ring, and the plurality of outlets are connected to the plurality of grouting holes in a one-to-one correspondence.

[0014] According to some embodiments of the present invention, the pile body is provided with a first filling material inside.

[0015] According to some embodiments of the present invention, the water-stop curtain further includes a third water-stop pile, which is disposed between the first water-stop pile and the second water-stop pile. The side of the third water-stop pile near the first water-stop pile is provided with a third water-stop part that is fastened to the first water-stop part to form a first water-stop structure. The side of the third water-stop pile near the second water-stop pile is provided with a fourth water-stop part that is fastened to the second water-stop part to form a second water-stop structure.

[0016] According to some embodiments of the present invention, the interior of the third water-stopping pile is provided with a second filling body.

[0017] According to some embodiments of the present invention, at least a portion of two adjacent mixing piles overlap.

[0018] A foundation pit system according to a second aspect of the present invention includes: a foundation pit; and a water-stop curtain as described in the above embodiment, the water-stop curtain being arranged around the foundation pit.

[0019] The foundation pit system according to the embodiments of this utility model has at least the following beneficial effects:

[0020] In the foundation pit system of this invention, the second water-stopping part is interlocked with the first water-stopping part to reduce the risk of the first and second water-stopping piles separating. Simultaneously, the interlocking of the second and first water-stopping parts creates a sealed water-stopping structure between the first and last mixing piles. This improves the sealing performance between the first and last mixing piles, thereby enhancing the water-stopping effect.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 A schematic diagram illustrating the construction sequence of each mixing pile;

[0024] Figure 2 This is a schematic diagram illustrating the traditional method of sealing the gap between the first and last mixing piles.

[0025] Figure 3 This is a top view of a foundation pit system according to an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A magnified view of a portion of the figure shown;

[0027] Figure 5 This is a diagram showing the connection between the tail-end mixing pile and the first water-stopping pile in one embodiment of this utility model.

[0028] Figure 6 This is a diagram showing the connection between the first mixing pile and the second water-stopping pile in one embodiment of this utility model.

[0029] Figure 7 This is a structural schematic diagram of the second water-stopping pile according to an embodiment of the present invention;

[0030] Figure 8 This is a top view of the second water-stopping pile according to an embodiment of the present utility model;

[0031] Figure 9 This is a partially enlarged cross-sectional view of the second water-stopping pile according to an embodiment of the present invention;

[0032] Figure 10 This is a top view of the third water-stopping pile according to an embodiment of this utility model.

[0033] Icon labels:

[0034] 10. Foundation pit;

[0035] 100. Mixing pile; 110. First-end mixing pile; 111. Insertion hole; 120. Last-end mixing pile; 130. Sealed mixing pile;

[0036] 200. First water-stopping pile; 210. First water-stopping section;

[0037] 300. Second water-stop pile; 310. Second water-stop section; 320. Pile body; 321. Grouting hole; 330. Grouting assembly; 331. Grouting pipe; 332. Grouting ring;

[0038] 400. Third water-stop pile; 410. Third water-stop section; 420. Fourth water-stop section;

[0039] 500, First water-stopping structure; 600, Second water-stopping structure. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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 of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] like Figure 3 As shown, an embodiment of the present invention provides a foundation pit system, which includes a foundation pit 10 and a water-stop curtain, the water-stop curtain being arranged around the foundation pit 10. It can be understood that the water-stop curtain is arranged between excavations of the foundation pit 10, thereby reducing the risk of groundwater seeping into the foundation pit 10 during subsequent excavation.

[0044] Combination Figure 3 and Figure 4 The water-stopping curtain includes mixing piles 100, first water-stopping piles 200, and second water-stopping piles 300.

[0045] like Figure 3 As shown, there are multiple mixing piles 100, which are arranged sequentially to surround the foundation pit 10 to be excavated.

[0046] Specifically, the mixing piles 100 are constructed one by one, starting with the first mixing pile 100 and proceeding sequentially along the perimeter of the excavation pit 10. It is understood that during construction, adjacent mixing piles 100 overlap, meaning that a portion of each adjacent mixing pile 100 is joined together. It should be noted that the mixing piles 100 are primarily formed by mixing and solidifying cement and soil. When constructing the next mixing pile 100, the cement in the previous pile 100 has not yet fully solidified. Therefore, during the construction of the next mixing pile 100, a portion of the cement and soil from the next pile 100 is mixed with a portion of the cement and soil from the previous pile 100, resulting in the overlap between the adjacent mixing piles 100. Once all the mixing piles 100 are constructed, they surround the excavation pit 10.

[0047] Combination Figure 3 and Figure 4 It is understandable that after all the mixing piles 100 are constructed, the two mixing piles 100 located at the beginning and end are set apart and opposite to each other. In other words, the first mixing pile 100 constructed and the last mixing pile 100 constructed are set apart and opposite to each other. The mixing pile 100 at the beginning is defined as the first mixing pile 110 (the first mixing pile 100 constructed), and the mixing pile 100 at the end (the last mixing pile 100 constructed) is defined as the last mixing pile 120.

[0048] Combination Figure 4 and Figure 5 The first water-stopping pile 200 is inserted into the tail-end mixing pile 120, and the first water-stopping pile 200 has a first water-stopping part 210, which is exposed on the side of the tail-end mixing pile 120 near the head-end mixing pile 110.

[0049] Understandably, after the construction of the tail-end mixing pile 120 is completed, before the tail-end mixing pile 120 has solidified, the first water-stop pile 200 can be inserted downwards from the top of the tail-end mixing pile 120. Furthermore, when inserting the first water-stop pile 200, a portion of it is inserted into the tail-end mixing pile 120 to be fixedly connected to it, while the first water-stopping part 210 is located outside the tail-end mixing pile 120. After the first water-stop pile 200 is inserted into place, the first water-stopping part 210 is located on the side of the tail-end mixing pile 120 closest to the head mixing pile 110.

[0050] It should be noted that the first water-stopping part 210 extends vertically, and the bottom of the first water-stopping part 210 is flush with or lower than the bottom of the tail-end mixing pile 120, while the top of the first water-stopping part 210 is flush with or higher than the top of the tail-end mixing pile 120. Of course, in other embodiments, the bottom of the first water-stopping part 210 may be slightly higher than the bottom of the tail-end mixing pile 120 (0-20cm higher), and the top of the first water-stopping part 210 may be slightly lower than the top of the tail-end mixing pile 120 (0-20cm lower).

[0051] Combination Figure 4 and Figure 6 The first mixing pile 110 is provided with a hole 111 extending downward from the top of the first mixing pile 110, and the hole 111 has a vertical opening that penetrates the first mixing pile 110 on the side near the tail mixing pile 120.

[0052] Specifically, a hole 111 can be drilled downwards from the top of the first mixing pile 110. When drilling the hole 111, the side of the first mixing pile 110 closest to the tail mixing pile 120 is drilled through to form a vertical opening. It should be noted that the hole 111 may or may not penetrate the bottom of the first mixing pile 110. For example, the bottom of the hole 111 may be 0-20 cm higher than the bottom of the first mixing pile 110.

[0053] The second water-stopping pile 300 is inserted into the insertion hole 111. The second water-stopping pile 300 has a second water-stopping part 310, which extends through a vertical opening to the side of the first mixing pile 110 near the tail mixing pile 120.

[0054] Understandably, after all the mixing piles 100 have been constructed, a considerable amount of time has passed since the construction of the first mixing pile 110. At this point, the first mixing pile 110 has solidified. Therefore, it is necessary to open a hole 111 on the first mixing pile 110 for the installation of the second water-stop pile 300. The second water-stop pile 300 can be inserted into the hole 111 from the top downwards. It should be noted that when inserting the second water-stop pile 300, only a portion of it is inserted into the hole 111, while the second water-stopping part 310 extends out of the first mixing pile 110 through a vertical opening. After the second water-stop pile 300 is inserted into place, the second water-stopping part 310 is located on the side of the first mixing pile 110 closer to the last mixing pile 120.

[0055] It should be noted that the second water-stopping part 310 extends vertically, and the bottom of the second water-stopping part 310 is flush with or lower than the bottom of the first mixing pile 110, while the top of the second water-stopping part 310 is flush with or higher than the top of the first mixing pile 110. Of course, in other embodiments, the lower part of the second water-stopping part 310 may be slightly higher than the bottom of the first mixing pile 110 (0-20cm higher), and the top of the second water-stopping part 310 may be slightly lower than the top of the first mixing pile 110 (0-20cm lower).

[0056] Combination Figure 4 , Figure 5 and Figure 6 The second water-stopping part 310 is interlocked with the first water-stopping part 210 to form a water-stopping structure. It is understood that the interlocking of the second water-stopping part 310 and the first water-stopping part 210 reduces the risk of the first water-stopping pile 200 and the second water-stopping pile 300 separating. Simultaneously, the interlocking of the second water-stopping part 310 and the first water-stopping part 210 ensures a sealed water-stopping structure between the first-end mixing pile 110 and the last-end mixing pile 120. This improves the sealing performance between the first-end mixing pile 110 and the last-end mixing pile 120, thereby enhancing the water-stopping effect.

[0057] It should be noted that the first water-stopping part 210 and the second water-stopping part 310 can be connected together by adjusting the position of the first water-stopping part 210 inserted into the tail-end mixing pile 120 (the position along the interval direction between the first-end mixing pile 110 and the tail-end mixing pile 120) and / or adjusting the opening position of the insertion hole 111 (the position along the interval direction between the first-end mixing pile 110 and the tail-end mixing pile 120).

[0058] like Figure 4 As shown, in some other embodiments, when the distance between the first water-stopping pile 200 and the second water-stopping pile 300 is too wide, a third water-stopping pile 400 can also be provided between the first water-stopping pile 200 and the second water-stopping pile 300. The number of third water-stopping piles 400 can be determined according to the distance between the first water-stopping pile 200 and the second water-stopping pile 300.

[0059] Combination Figure 4 , Figure 5 , Figure 6 as well as Figure 10 Specifically, the third water-stopping pile 400 is disposed between the first water-stopping pile 200 and the second water-stopping pile 300. The third water-stopping pile 400 has a third water-stopping part 410 on the side closer to the first water-stopping pile 200, which is fastened to the first water-stopping part 210 to form the first water-stopping structure 500. The third water-stopping pile 400 has a fourth water-stopping part 420 on the side closer to the second water-stopping pile 300, which is fastened to the second water-stopping part 310 to form the second water-stopping structure 600.

[0060] More specifically, the third water-stop pile 400 extends vertically, and the third water-stop portion 410 and the fourth water-stop portion 420 also extend vertically. The third water-stop portion 410 and the fourth water-stop portion 420 are respectively disposed on two opposite sides of the third water-stop pile 400. The bottom of the third water-stop portion 410 and the fourth water-stop portion 420 is flush with or lower than the bottom of the third water-stop pile 400, and the top of the third water-stop portion 410 and the fourth water-stop portion 420 is flush with or higher than the top of the third water-stop pile 400. Of course, in other embodiments, the bottom of the third water-stop portion 410 and the fourth water-stop portion 420 may also be slightly higher than the bottom of the third water-stop pile 400 (0-20cm higher), and the top of the third water-stop portion 410 and the fourth water-stop portion 420 may also be slightly lower than the top of the third water-stop pile 400 (0-20cm lower).

[0061] After the third water-stopping part 410 is fastened to the first water-stopping part 210, a sealed first water-stopping structure 500 can be formed; after the fourth water-stopping part 420 is fastened to the second water-stopping part 310, a sealed second water-stopping structure 600 can be formed. In this way, the sealing between the first-end mixing pile 110 and the last-end mixing pile 120 can be improved, thereby improving the water-stopping effect.

[0062] Please refer to Figure 6 In some embodiments, a sealing member is filled between the hole wall of the insertion hole 111 and the second water-stop pile 300. The sealing member is used to seal the gap between the hole wall of the insertion hole 111 and the second water-stop pile 300, thereby achieving the function of water stop.

[0063] like Figures 7 to 9 As shown, specifically, the second water-stopping pile 300 includes a pile body 320 and a grouting assembly 330 disposed within the pile body 320. The side wall of the pile body 320 is provided with a grouting hole 321, and the grouting assembly 330 is provided with a grouting channel. The top of the grouting channel extends to the top of the pile body 320, and the grouting channel is also connected to the grouting hole 321.

[0064] It is understandable that by injecting grout into the top of the grouting channel, the grout can flow along the grouting channel to the grouting hole 321, and then flow through the grouting hole 321 to the gap between the hole wall of the insertion hole 111 and the second water-stop pile 300. After the grout solidifies, it can form a solid sealing component to seal the gap between the hole wall of the insertion hole 111 and the second water-stop pile 300.

[0065] It should be noted that the grout can be cement grout, and the grouting pressure can be set at 2~3MPa, or the grouting pressure can be increased appropriately depending on the grouting situation.

[0066] Specifically, the grouting assembly 330 includes a grouting pipe 331 and a grouting ring 332. The grouting pipe 331 is vertically extended and disposed within the pile body 320. The grouting ring 332 is disposed inside the pile body 320 and communicates with the bottom of the grouting pipe 331. The side wall of the pile body 320 is provided with a plurality of grouting holes 321 spaced apart along the circumference of the pile body 320. The grouting ring 332 is provided with a plurality of outlets that communicate with the plurality of grouting holes 321 respectively.

[0067] More specifically, multiple grouting holes 321 are arranged around the grouting ring 332, multiple outlets are opened on the outer wall of the grouting ring 332, and the multiple outlets are connected to the multiple grouting holes 321 in a one-to-one correspondence.

[0068] It is understandable that the internal channels of the grouting pipe 331 and the internal channels of the grouting ring 332 constitute the grouting channel. After grouting is injected into the top of the grouting pipe 331, the grout will enter the grouting ring 332 along the grouting pipe 331, and then flow through each outlet of the grouting ring 332 to multiple grouting holes 321, and then flow through each grouting hole 321 to the gap between the hole wall of the insertion hole 111 and the second water-stop pile 300.

[0069] The distance between the grouting hole 321 and the bottom of the pile body 320 can be set between 60cm and 120cm.

[0070] Please refer to Figure 4 and Figure 7 Furthermore, the interior of the pile body 320 is provided with a first filling material. The first filling material can be coarse sand.

[0071] Furthermore, the interior of the third water-stop pile 400 is provided with a second filling material. The second filling material can be coarse sand.

[0072] The specific construction process of the water-stop curtain of this utility model is as follows:

[0073] Please refer to Figures 3 to 6First, starting with the first mixing pile 100 (first-end mixing pile 110), the other mixing piles 100 are constructed sequentially along the perimeter of the excavated pit 10. After the last mixing pile 100 (last-end mixing pile 120) is completed, the first water-stop pile 200 is inserted into it before the initial setting of the last-end mixing pile 120. Because the cement of the mixing pile 100 has not completely solidified, the first water-stop pile 200 will be inserted smoothly. Then, the third water-stop pile 400 is constructed between the first-end mixing pile 110 and the last-end mixing pile 120, and the third water-stopping part 410 of the third water-stop pile 400 is connected to the first water-stopping part 210 of the first water-stop pile 200. Then, the first-end mixing pile... Drill holes 111 on the first water-stop pile 110 and insert the second water-stop pile 300 into the holes 111, so that the second water-stopping part 310 of the second water-stop pile 300 is connected to the fourth water-stopping part 420 of the third water-stop pile 400. The purpose of drilling holes 111 is that since the first mixing pile 110 has already solidified, directly driving the second water-stop pile 300 into the first mixing pile 110 would cause the first mixing pile 110 to crack, posing a risk of water leakage. Afterwards, medium-coarse sand is used to backfill each water-stop pile. Then, grout is injected into the grouting component 330 to fill the gap between the pile body 320 and the hole wall of the insertion hole 111. At this point, the water-stop curtain is officially formed. It should be noted that each water-stop pile needs to penetrate through the permeable soil layer and enter into a relatively impermeable layer, or it can penetrate into a certain depth in the strongly weathered rock layer to better play its role in stopping water.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water-stop curtain, characterized in that, include: Multiple mixing piles are arranged sequentially to surround the foundation pit to be excavated. Two mixing piles are located at the beginning and end of the pit and are spaced apart and opposite to each other. The mixing pile at the beginning is defined as the beginning mixing pile and the mixing pile at the end is defined as the end mixing pile. The beginning mixing pile is provided with a hole extending downward from the top of the beginning mixing pile. The hole has a vertical opening that penetrates the side of the beginning mixing pile near the end mixing pile. The first water-stopping pile is inserted into the tail-end mixing pile, and the first water-stopping pile has a first water-stopping part, which is exposed on the side of the tail-end mixing pile near the head-end mixing pile. The second water-stopping pile is inserted into the insertion hole. The second water-stopping pile has a second water-stopping part. The second water-stopping part extends through the vertical opening to the side of the first end mixing pile near the tail end mixing pile. The second water-stopping part is engaged with the first water-stopping part to form a water-stopping structure.

2. The water-stop curtain according to claim 1, characterized in that, A sealing component is filled between the hole wall and the second water-stop pile.

3. The water-stop curtain according to claim 1, characterized in that, The second water-stopping pile includes a pile body and a grouting assembly disposed within the pile body. The side wall of the pile body is provided with grouting holes, and the grouting assembly is provided with grouting channels. The top of the grouting channels extends to the top of the pile body, and the grouting channels are also connected to the grouting holes.

4. The water-stop curtain according to claim 3, characterized in that, The grouting assembly includes a grouting pipe and a grouting ring. The grouting pipe extends vertically within the pile body, and the grouting ring is disposed inside the pile body and communicates with the bottom of the grouting pipe. The sidewall of the pile body is provided with a plurality of grouting holes spaced apart along the circumference of the pile body, and the grouting ring is provided with a plurality of outlets respectively communicating with the plurality of grouting holes.

5. The water-stop curtain according to claim 4, characterized in that, A plurality of grouting holes are arranged around the grouting ring, and a plurality of outlets are opened on the outer side wall of the grouting ring, and the plurality of outlets are connected to the plurality of grouting holes in a one-to-one correspondence.

6. The water-stop curtain according to claim 3, characterized in that, The pile body is filled with a first filling material.

7. The water-stop curtain according to claim 1, characterized in that, It also includes a third water-stopping pile, which is disposed between the first water-stopping pile and the second water-stopping pile. The third water-stopping pile has a third water-stopping part on the side near the first water-stopping pile that is fastened to the first water-stopping part to form a first water-stopping structure. The third water-stopping pile has a fourth water-stopping part on the side near the second water-stopping pile that is fastened to the second water-stopping part to form a second water-stopping structure.

8. The water-stop curtain according to claim 7, characterized in that, The third water-stopping pile has a second filling material inside.

9. The water-stop curtain according to claim 1, characterized in that, At least some of the two adjacent mixing piles overlap.

10. A foundation pit system, characterized in that, include: Foundation pit; The water-stop curtain according to any one of claims 1 to 9, wherein the water-stop curtain is arranged around the foundation pit.

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