Prefabricated concrete sheet pile water stop structure

Abstract

The invention relates to a precast concrete sheet pile water stop structure. Grooves are formed in the splicing faces of the two sides of a sheet pile, and connecting pieces are arranged on the grooves; the connecting piece comprises a fixing part, a connecting part and water stopping parts, the two ends of the connecting part are connected with the fixing part and the water stopping parts correspondingly, the fixing part is located in the grooves and connected with the sheet pile, and the two water stopping parts on the two opposite grooves are matched with each other and form a first face and a second face which are attached to each other; the first surface is provided with at least one convex peak, and the second surface is provided with a concave valley matched with the convex peak. The prefabricated concrete sheet pile water stop structure has the following advantages that the first face and the second face are attached, it is guaranteed that the two water stop parts are tightly combined, and water seepage is prevented; compared with traditional grouting water stopping, construction is complex, cost is high, the connecting piece can be installed in advance, after the sheet piles are spliced, the first face and the second face are attached to each other, and the sheet piles are automatically pressed and closed under the back side water and soil pressure to achieve the good water stopping effect.

Description

Technical Field

[0001] The present invention relates to the technical field of retaining and waterproofing of retaining and enclosing structures, and particularly to a waterproof structure for precast concrete sheet piles. Background Art

[0002] In the field of engineering construction such as river revetments, slope treatment, and foundation pit engineering, there are a large number of vertical retaining structures. Generally, the structural forms adopted include row pile structures, gravity structures, etc. The row pile structure can adopt forms such as sheet piles, bored cast-in-place piles, and diaphragm walls. Among them, for bored cast-in-place piles and diaphragm walls, after the holes or grooves are formed, the steel reinforcement cages are hoisted and placed, and the concrete is poured by the conduit method to form the retaining wall. The construction period is long, the cost is high, and slurry wall protection is required during the hole or groove formation process, resulting in large environmental pollution. At the same time, bored cast-in-place piles are generally arranged at intervals, and cement-soil mixing piles or high-pressure jet grouting piles are required for waterproofing between the piles, which is troublesome in construction; due to the influence of construction methods and geological conditions, adjacent groove sections of diaphragm walls are prone to being uneven, causing leakage.

[0003] Therefore, in recent years, a large number of precast piles have been used in retaining structures, including precast sheet piles, precast pipe piles, etc. For precast sheet piles, they are generally arranged in close rows, and the connection between adjacent piles is realized by using the rabbets or grouting grooves provided on the two right-angle sides. In foundation pit engineering, there is also a form of inserting precast sheet piles into cement-soil mixing piles or cement-soil mixing pile walls to combine the retaining piles with the waterproof structure.

[0004] However, the construction difficulty of precast concrete sheet piles lies in solving the waterproofing between the piles. The traditional waterproofing between the piles uses high-pressure jet grouting piles, cement mixing piles or grouting behind the piles. The cost of using high-pressure jet grouting piles and cement mixing piles for waterproofing is relatively high, and the waterproofing effect of grouting is difficult to guarantee. Summary of the Invention

[0005] An object of the present application is to provide a waterproof structure for precast concrete sheet piles, which has low cost and good waterproofing effect.

[0006] The technical solution adopted in the present application is as follows: A waterproof structure for precast concrete sheet piles, wherein grooves are provided on both splicing surfaces of the sheet piles, and connectors are provided on the grooves; the connectors include a fixing part, a connecting part, and a waterproof part. The two ends of the connecting part are respectively connected to the fixing part and the waterproof part. The fixing part is located in the groove and is connected to the sheet pile. The two waterproof parts on the opposite two grooves cooperate with each other to form a first surface and a second surface that are mutually attached, and both the first surface and the second surface are located between the fixing part and the waterproof part.

[0007] Compared with the prior art, the advantages of the present application are that the fixing part is used to connect with the sheet pile to ensure the firm and reliable connection between the connecting piece and the sheet pile, and the connecting part is used to connect the fixing part and the water stop part, so that the water stop part is well supported; the first surface and the second surface are attached to each other, ensuring the tight combination between the two water stop parts, enabling the tight connection between adjacent sheet piles and preventing water seepage; compared with the traditional grouting water stop, the construction is complex and the cost is high. By using the connecting piece, the connecting piece can be pre-installed. After the sheet piles are spliced, the first surface and the second surface are attached to each other, and automatically press and close under the backside soil and water pressure to achieve a good water stop effect.

[0008] In some embodiments of the present application, at least one convex peak is provided on the first surface, and a concave valley cooperating with the convex peak is provided on the second surface. The design of the cooperation between the convex peak and the concave valley not only increases the contact area but also makes it difficult for the first surface and the second surface to slide relative to each other, ensuring a more firm attachment between the first surface and the second surface. Especially when automatically pressed and closed under the backside soil and water pressure, the plane is prone to a certain degree of sliding, the connecting piece is more likely to deform under force, reducing the water stop effect. However, with the cooperation of the convex peak and the concave valley, there is a certain locking force between the first surface and the second surface, and they are not easy to slide and deform, resulting in a better water stop effect. That is to say, under the same conditions, a greater backside soil and water pressure is required to make the convex peak and the concave valley slide.

[0009] Furthermore, two convex peaks are provided on the first surface, and two corresponding concave valleys are provided on the second surface, and the two convex peaks are arranged on both sides of the first surface.

[0010] In some embodiments of the present application, a guiding tenon is provided on the first surface, and a guiding groove cooperating with the guiding tenon is provided on the second surface. The design of the cooperation between the guiding tenon and the guiding groove can not only make the first surface and the second surface fit precisely, facilitating the cooperative installation of the two water stop parts, but also improve the locking between the first surface and the second surface, preventing the first surface and the second surface from sliding or disengaging, and ensuring the firm attachment between the first surface and the second surface. Especially when automatically pressed and closed under the backside soil and water pressure, the guiding tenon is stuck in the guiding groove, and the guiding tenon cannot move towards the two side walls of the guiding groove, that is, the first surface and the second surface cannot slide to both sides, ensuring the reliable fitting connection between the two.

[0011] In some embodiments of the present application, an emergency grouting channel is formed between the first surface and the second surface in the attached state. The design of the emergency grouting channel can perform grouting through the emergency grouting channel as a guarantee for secondary water stop to improve the water stop effect, or facilitate emergency grouting when necessary.

[0012] In some embodiments of the present application, the connecting member is made of rubber. The rubber material has a certain elasticity, which is beneficial for fitting and makes the connecting member not easily break. The connecting member includes at least one layer of built-in nylon skeleton, which makes the structural strength of the connecting member higher and can withstand greater backside soil and water pressure.

[0013] Furthermore, a cavity is provided in the water stop portion, which is beneficial for the compression of the water stop portion and improves the sealing performance. During initial installation, there will inevitably be errors in the self-size of the sheet pile and the splicing position during assembly. In order to improve the water stop performance, the cooperation between the two water stop portions requires tightness, making the installation more difficult. The water stop portion adopts an internal hollow design, enabling the water stop portion itself to have a certain amount of compression to overcome size and position deviations, reducing the assembly difficulty and improving the assembly efficiency. When subjected to backside soil and water pressure, the water stop portion is compressed and fits more tightly.

[0014] In some embodiments of the present application, a pull ring is provided on the fixing portion. During installation, maintenance, and replacement, the connecting members are in the groove and closely fit together, making it difficult to take them. The design of the pull ring can facilitate the taking of the connecting members and improve the efficiency of installation, maintenance, and replacement.

[0015] Furthermore, the pull ring is connected to the fixing portion through a rod. The top end of the rod is connected to the pull ring, and the lower part of the rod is connected to the fixing portion. The rod is buried in the fixing portion, and the connection with the fixing portion is reliable. Also, the bottom of the rod is flush with the bottom of the fixing portion, and the top of the rod is flush with the top of the fixing portion, that is, the whole rod runs through the fixing portion, acting as a skeleton of the fixing portion, improving the structural strength of the fixing portion. At the same time, the pull ring extracts the entire connecting member through the rod, preventing the fixing portion from being unevenly stressed and causing fracture.

[0016] Furthermore, the pull ring is a flat-top hollow ring. The pull ring being a flat-top hollow ring with a flat top facilitates hammering installation.

[0017] In some embodiments of the present application, the groove includes a fixing portion installation groove and a water stop portion connection groove that are interconnected. The fixing portion is arranged in the fixing portion installation groove and is clamped with the sheet pile through the fixing portion installation groove. The water stop portion is arranged on the water stop portion connection groove on the opposite side. The design of the fixing portion installation groove and the water stop portion connection groove makes the installation positions of the fixing portion and the water stop portion clear. At the same time, adopting the installation method of clamping the fixing portion into the fixing portion installation groove is simple.

[0018] Furthermore, chamfers and / or rounded corners are provided on the fixing portion installation groove. The chamfering or rounding treatment on the fixing portion installation groove can prevent stress concentration in the precast structure.

[0019] In some embodiments of the present application, the angle between the connecting portion and the fixing portion is greater than 90°, preventing stress concentration at the connection between the connecting portion and the fixing portion; the angle between the connecting portion and the water stop portion is greater than 90°, preventing stress concentration at the connection between the connecting portion and the water stop portion.

[0020] In some embodiments of the present application, a water-swellable rubber strip is provided between the groove and the connecting member. After the connecting member is installed, there will inevitably be a gap between the groove and the connecting member. By filling the gap with the water-swellable rubber strip, an integral body is formed, which can transmit forces in all directions, disperse the forces, and the rubber strip will expand after encountering water, achieving a plugging effect and further improving the water stop effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0022] Figure 2 is a schematic structural diagram of two grooves provided on the splicing surface of Embodiment 1 of the present invention;

[0023] Figure 3 is a schematic structural diagram of Embodiment 2 of the present invention;

[0024] Figure 4 is a cross-sectional view of a pair of mating connecting members of Embodiment 2 of the present invention;

[0025] Figure 5 is a schematic structural diagram of Embodiment 3 of the present invention;

[0026] Figure 6 is a cross-sectional view of a pair of mating connecting members of Embodiment 3 of the present invention

[0027] Figure 7 is a schematic structural diagram of the installation structure of the pull ring and the rod of Embodiment 3 of the present invention;

[0028] Figure 8 is a schematic structural diagram of the groove of Embodiment 3 of the present invention.

[0029] In the figure: 1, sheet pile; 2, groove; 3, fixing portion; 4, connecting portion; 5, water stop portion; 6, first surface; 7, second surface; 8, convex peak; 9, concave valley; 10, guiding tenon; 11, guiding groove; 12, built-in nylon skeleton; 13, pull ring; 14, rod; 15, fixing portion installation groove; 16, water stop portion connection groove; 17, chamfer; 18, rubber strip; 19, emergency grouting channel; 20, cavity; 21, fillet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, elaborate in detail on the specific implementation manners, structures, features and their effects of the present invention as follows.

[0031] Embodiment 1:

[0032] A precast concrete sheet pile water stop structure provided in this embodiment is as shown in Figure 1 the figure. Grooves 2 are provided on both splicing surfaces of the sheet pile 1, and connectors are provided on the grooves 2; the connector includes a fixing part 3, a connecting part 4 and a water stop part 5. The two ends of the connecting part 4 are respectively connected to the fixing part 3 and the water stop part 5. The fixing part 3 is located in the groove 2 and is connected to the sheet pile 1. The two water stop parts 5 on the opposite two grooves 2 cooperate with each other to form a first surface 6 and a second surface 7 that are mutually attached. Both the first surface 6 and the second surface 7 are located between the fixing part 3 and the water stop part 5. In this embodiment, the fixing part 3 is connected to the sheet pile 1 by bolts; the connector is made of rubber material; one groove 2 is provided on both splicing surfaces of each sheet pile 1. Of course, multiple grooves 2 can also be provided on both splicing surfaces of each sheet pile 1, for example, two grooves 2 are provided on each side, as shown in Figure 2 the figure.

[0033] The fixing part 3 is used to connect with the sheet pile 1 to ensure the firm and reliable connection between the connector and the sheet pile 1. The connecting part 4 is used to connect the fixing part 3 and the water stop part 5 so that the water stop part 5 is well supported; the first surface 6 and the second surface 7 are attached to ensure the tight combination between the two water stop parts 5 and prevent water seepage; both the first surface 6 and the second surface 7 are located between the fixing part 3 and the water stop part 5, which can ensure that when subjected to the backside water and soil pressure, the first surface 6 and the second surface 7 still fit and bear force with each other; compared with the traditional grouting water stop, the construction is complex and the cost is high. By using the said connector, the connector can be pre-installed. After the sheet pile 1 is spliced, the first surface 6 and the second surface 7 are mutually attached and automatically pressed and closed when subjected to the backside water and soil pressure, thus achieving a good water stop effect.

[0034] Embodiment 2:

[0035] A precast concrete sheet pile water stop structure provided in this embodiment, in order to improve the water stop effect, is as shown in Figure 3 、 Figure 4As shown, in addition to the features described in Embodiment 1, at least one convex peak 8 is provided on the first surface 6, and a concave valley 9 that cooperates with the convex peak 8 is provided on the second surface 7. In this embodiment, two convex peaks 8 are provided on the first surface 6, and correspondingly two concave valleys 9 that cooperate therewith are provided on the second surface 7. The two convex peaks 8 are provided on both sides of the first surface 6. The convex peaks 8 are provided on both sides, so that the fitting effect of both sides of the first surface 6 and the second surface 7 is better, and it is not easy to slide on both sides. The design of the cooperation between the convex peak 8 and the concave valley 9 not only increases the contact area, but also makes it not easy for the first surface 6 and the second surface 7 to relatively slide, ensuring that the first surface 6 and the second surface 7 are more firmly fitted. Especially when automatically pressed and closed by the backside soil and water pressure, the plane is prone to a certain degree of sliding, the connecting member is more likely to deform under force, reducing the water stop effect. By using the cooperation of the convex peak 8 and the concave valley 9, there is a certain locking force between the first surface 6 and the second surface 7, and the two are not easy to slide and are not easy to deform, and the water stop effect is better. That is to say, under the same conditions, a greater backside soil and water pressure is required to make the convex peak 8 and the concave valley 9 slide.

[0036] The two convex peaks 8 can also be made of different materials. The former is made of high-hardness rubber, such as high-hardness ethylene propylene diene monomer rubber (Shore hardness 75±5), to achieve rigid contact, and the latter is made of a composite silicone rubber layer (Shore hardness 45±3) to provide flexible adaptive compensation.

[0037] To facilitate installation and improve the water stop effect, a guiding tenon 10 is provided on the first surface 6, and a guiding groove 11 that cooperates with the guiding tenon 10 is provided on the second surface 7. The design of the cooperation between the guiding tenon 10 and the guiding groove 11 can not only make the first surface 6 and the second surface 7 fit precisely, facilitating the fitting and installation of the two water stop parts 5, but also improve the locking between the first surface 6 and the second surface 7, preventing the first surface 6 and the second surface 7 from sliding or disengaging, ensuring that the first surface 6 and the second surface 7 are firmly fitted. Especially when automatically pressed and closed by the backside soil and water pressure, the guiding tenon 10 is stuck in the guiding groove 11, and the guiding tenon 10 cannot move towards the two side walls of the guiding groove 11, that is, the first surface 6 and the second surface 7 cannot slide to both sides, ensuring the reliable fitting connection between the two.

[0038] In this embodiment, the guiding tenon 10 is provided on the convex peak 8, and the corresponding guiding groove 11 is provided on the concave valley 9; one guiding tenon 10 is provided on each convex peak 8, and a corresponding guiding groove 11 that cooperates therewith is provided on each concave valley 9; the guiding tenon 10 is provided at the top of the convex peak 8.

[0039] To improve the safety of use, an emergency grouting channel 19 is formed between the first side 6 and the second side 7 in the state where the first side 6 and the second side 7 are adhered. The diameter of the emergency grouting channel 19 is 10 mm. The design of the emergency grouting channel 19 enables grouting through the emergency grouting channel 19, serving as a guarantee for secondary water stoppage, improving the water stoppage effect, or facilitating emergency grouting when necessary.

[0040] In this embodiment, concave surfaces are provided on both the first side 6 and the second side 7. In the state where the first side 6 and the second side 7 are adhered, the two concave surfaces form the emergency grouting channel 19; the emergency grouting channel 19 is located between two convex peaks 8.

[0041] To ensure the reliability of the connecting member, the connecting member is made of rubber; the connecting member includes at least one layer of an internal nylon skeleton 12. The rubber material has a certain elasticity, which is beneficial for fitting and makes the connecting member not easily break; the internal nylon skeleton 12 makes the structural strength of the connecting member higher and can withstand greater backside water and soil pressure.

[0042] In this embodiment, one layer of the internal nylon skeleton 12 is provided; the internal nylon skeleton 12 is arranged around the inner side of the outer surface of the connecting member.

[0043] To facilitate close fitting, the angle between the connecting portion 4 and the fixing portion 3 is greater than 90° to prevent stress concentration at the connection between the connecting portion 4 and the fixing portion 3; the angle between the connecting portion 4 and the water stop portion 5 is greater than 90° to prevent stress concentration at the connection between the connecting portion 4 and the water stop portion 5. In the state where the first side 6 and the second side 7 are adhered, the connecting portion 4 is in contact with the water stop portion 5. At the same time, the inclined design of the connecting portion 4 enables the surface where the connecting portion 4 is in contact with the water stop portion 5 to also bear a certain amount of pressure.

[0044] Embodiment 3:

[0045] A precast concrete sheet pile water stop structure provided in this embodiment, to facilitate close fitting, as Figure 5 、 Figure 6 shown, in addition to the features described in Embodiment 2, a cavity 20 is provided inside the water stop portion 5, that is, the water stop portion 5 has a hollow structure. The cavity 20 is beneficial for the compression of the water stop portion 5 and improves the sealing performance. During initial installation, there will inevitably be errors in the self-size of the sheet pile 1 and the splicing position during assembly. To improve the water stop performance, the cooperation between the two water stop portions 5 requires tightness, making the installation more difficult. The water stop portion 5 is designed with an internal hollow structure, enabling the water stop portion 5 itself to have a certain amount of compression to overcome size and position deviations, reducing the assembly difficulty and improving the assembly efficiency. When subjected to backside water and soil pressure, the water stop portion 5 is compressed and fits more closely.

[0046] To facilitate installation, maintenance, and replacement, as Figure 7As shown, a pull ring 13 is provided on the fixing part 3; the pull ring 13 is connected to the fixing part 3 through a rod 14. The top end of the rod 14 is connected to the pull ring 13, and the lower part of the rod 14 is connected to the fixing part 3; the pull ring 13 is a flat-top hollow ring. In this embodiment, two pull rings 13 are provided; the pull ring 13 is made of a metal structure or other high-strength structures; the bottom surface of the pull ring 13 is lower than the top surface of the fixing part 3. During installation, maintenance, and replacement, the connecting parts are in the groove 2 and are closely attached to each other, making it difficult to take them. The design of the pull ring 13 can facilitate the taking of the connecting parts and improve the efficiency of installation, maintenance, and replacement; the rod 14 is buried in the fixing part 3, and the connection with the fixing part 3 is reliable. Moreover, the bottom of the rod 14 is flush with the bottom of the fixing part 3, and the top of the rod 14 is flush with the top of the fixing part 3, that is, the whole rod 14 penetrates through the fixing part 3, acting as a skeleton of the fixing part 3, improving the structural strength of the fixing part 3. At the same time, the pull ring 13 extracts the entire connecting part through the rod 14, preventing the fixing part 3 from being unevenly stressed and causing fracture; the pull ring 13 is a flat-top hollow ring with a flat top, which is convenient for hammering and installation.

[0047] For the reliability of the groove 2, as Figure 8 shown, the groove 2 includes a fixing part installation groove 15 and a water stop part connection groove 16 that communicate with each other. The fixing part 3 is arranged in the fixing part installation groove 15 and is clamped to the sheet pile 1 through the fixing part installation groove 15. The water stop part 5 is arranged on the water stop part connection groove 16 on the opposite side; a chamfer 17 and / or a fillet 21 are provided on the fixing part installation groove 15. In this embodiment, a chamfer 17 and a fillet 21 are provided on the fixing part installation groove 15. The chamfer 17 and the fillet 21 are both arranged between the adjacent groove walls of the fixing part installation groove 15 and between the groove wall of the fixing part installation groove 15 and the groove wall of the water stop part connection groove 16; a chamfer 17 is provided on the side of the fixing part installation groove 15 away from the fixing part 3, and chamfering treatment is performed on the corresponding side of the fixing part 3; the opening of the water stop part connection groove 16 faces the water stop part connection groove 16 on the opposite sheet pile 1. The design of the fixing part installation groove 15 and the water stop part connection groove 16 makes the installation positions of the fixing part 3 and the water stop part 5 clear. At the same time, the installation method of clamping the fixing part 3 into the fixing part installation groove 15 is simple; the chamfer 17 or fillet treatment on the fixing part installation groove 15 can prevent stress concentration in the precast structure.

[0048] For reliable installation, a water-swellable rubber strip 18 is provided between the groove 2 and the connecting part. After the connecting part is installed, there will inevitably be a gap between the groove 2 and the connecting part. By filling the water-swellable rubber strip 18 in the gap, an integral body is formed, which can transfer the force in all directions, disperse the force, and the rubber strip 18 will expand when encountering water, achieving a plugging effect and further improving the water-stop effect.

[0049] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A precast concrete sheet pile water-stopping structure, characterized in that: Grooves (2) are provided on the joint surfaces on both sides of the sheet pile (1), and a connecting piece is provided on the groove (2); the connecting piece comprises a fixing part (3), a connecting part (4) and a water stop part (5), and the two ends of the connecting part (4) are respectively connected to the fixing part (3) and the water stop part (5), the fixing part (3) is located in the groove (2) and is connected to the sheet pile (1), and the two water stop parts (5) on the two opposite grooves (2) cooperate with each other to form a first surface (6) and a second surface (7) that fit each other, and the first surface (6) and the second surface (7) are both located between the fixing part (3) and the water stop part (5); at least one convex peak (8) is provided on the first surface (6), and a concave valley (9) that cooperates with the convex peak (8) is provided on the second surface (7); the connecting piece is made of rubber.

2. The precast concrete sheet pile water-stopping structure according to claim 1 is characterized in that: Two convex peaks (8) are arranged on the first surface (6), and two matching concave valleys (9) are arranged on the second surface (7) accordingly, and the two convex peaks (8) are arranged on both sides of the first surface (6).

3. The precast concrete sheet pile water-stopping structure according to claim 1 is characterized in that: The first surface (6) is provided with a guide tenon (10), and the second surface (7) is provided with a guide groove (11) that matches the guide tenon (10).

4. A precast concrete sheet pile water-stopping structure according to claim 1, characterized in that: When the first surface (6) and the second surface (7) are in abutment with each other, an emergency grouting channel (19) is formed between the first surface (6) and the second surface (7).

5. The precast concrete sheet pile water-stopping structure according to claim 1 is characterized in that: The connecting piece comprises at least one layer of internal nylon skeleton (12).

6. A precast concrete sheet pile water-stopping structure according to claim 5, characterized in that: The water stop portion (5) is provided with a cavity (20).

7. The precast concrete sheet pile water-stopping structure according to claim 1 is characterized in that: The fixing part (3) is provided with a pull ring (13); the pull ring (13) is connected to the fixing part (3) via a rod (14); the top of the rod (14) is connected to the pull ring (13), and the bottom of the rod (14) is connected to the fixing part (3); the pull ring (13) is a flat-topped hollow ring.

8. The precast concrete sheet pile water-stopping structure according to claim 1 is characterized in that: The groove (2) comprises a fixing portion installation groove (15) and a water stop portion connecting groove (16) which are interconnected; the fixing portion (3) is arranged in the fixing portion installation groove (15) and is clamped with the sheet pile (1) through the fixing portion installation groove (15); the water stop portion (5) is arranged on the water stop portion connecting groove (16) on the opposite side; and the fixing portion installation groove (15) is provided with a chamfer (17) and / or a rounded corner (21).

9. The precast concrete sheet pile water-stopping structure according to claim 1 is characterized in that: The angle between the connecting portion (4) and the fixing portion (3) is greater than 90°; and the angle between the connecting portion (4) and the water stop portion (5) is greater than 90°.

10. The precast concrete sheet pile water-stopping structure according to claim 1, characterized in that: A rubber strip (18) that swells when exposed to water is provided between the groove (2) and the connecting piece.

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