Composite waterstop structure

Abstract

The utility model provides a kind of composite waterstop structure, including alternate arrangement and mutually occlusion plain concrete pile and reinforced concrete pile, the arc-shaped notch facade of plain concrete pile near the side of reinforced concrete pile is provided with three groups of insertion slot extending along vertical direction, the steel reinforcement cage of the reinforced concrete pile is fixedly connected with waterstop plate, and the side of waterstop plate is located in the insertion slot;The utility model is by being provided with insertion slot on the arc-shaped notch facade of plain concrete pile, and waterstop plate is fixedly connected on the steel reinforcement cage of reinforced concrete pile, and waterstop plate side edge is embedded in insertion slot, forms a reliable waterstop barrier, not only strengthens the overall waterstop performance of occlusion pile, but also can effectively resist the microscopic crack produced by concrete solidification shrinkage, foundation uneven settlement or external load effect etc., to significantly reduce the risk of seepage.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit water-stopping technology, specifically relating to a composite water-stopping structure. Background Technology

[0002] Deep foundation pit engineering is a crucial aspect of modern urban construction, and the reliability of its support structure's water-stopping capability directly affects the stability of the foundation pit itself and the safety of the surrounding environment. Among various water-stopping support methods, interlocking piles (i.e., continuous pile rows formed by alternating plain concrete piles and reinforced concrete piles interlocking with each other) are widely used due to their good integrity and excellent water-stopping effect.

[0003] The construction of traditional interlocking piles mainly adopts the "full casing drilling rig cutting" process. Its basic principle is: first, a plain concrete pile is constructed, and an ultra-retarder is added to the plain concrete pile to ensure that it is still in a pre-set state when the adjacent reinforced concrete pile is constructed; then, a full casing drilling rig is used to cut holes on the side of the plain concrete pile to form an interlocking space, and then the reinforcement cage of the reinforced concrete pile is installed and the concrete is poured in this space, finally achieving the interlocking of the reinforced concrete pile and the plain concrete pile.

[0004] However, the water-stopping ability of this traditional interlocking pile depends entirely on the density of the interlocking concrete. Under the action of concrete solidification shrinkage, uneven settlement of the foundation, or external loads, micro-cracks are easily generated at the interlocking interface, which can become a hidden danger of water seepage. Once leakage occurs, it will not only affect the stability of the foundation pit, but may also damage the surrounding buildings and underground pipelines. Utility Model Content

[0005] The purpose of this invention is to provide a composite waterproofing structure to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A composite water-stopping structure includes plain concrete piles and reinforced concrete piles that are alternately arranged and interlocked. The plain concrete piles have three sets of slots extending vertically on the arc-shaped notch facade on the side closest to the reinforced concrete piles. A water-stopping plate is fixedly connected to the reinforcing cage of the reinforced concrete piles, and the side of the water-stopping plate is located in the slot.

[0007] Preferably, the waterstop plate is provided with multiple V-shaped protrusions, and the side of the waterstop plate located on one side of the slot is wrapped with an expansion waterstop sleeve; the slot includes a connected trapezoidal groove segment and a rectangular groove segment, and the expansion waterstop sleeve is accommodated in the rectangular groove segment.

[0008] Preferably, the trapezoidal groove segment has a trapezoidal cross-section, with its long side located on the side facing the reinforced concrete pile, and the length of its short side being greater than the thickness of the waterstop plate; the rectangular groove segment has a rectangular cross-section, with both its width and depth being greater than the length of the short side of the trapezoidal groove segment.

[0009] Preferably, the waterstop plate has a T-shaped protrusion on one side of the slot, and the expansion waterstop sleeve has a T-shaped groove that matches the T-shaped protrusion; the cross-sectional dimension of the expansion waterstop sleeve in its free state is smaller than the dimension of the rectangular groove segment.

[0010] Preferably, the waterstop plate is connected to the reinforcing cage through multiple connectors. Each connector includes: two symmetrically arranged clamping plates with an arc-shaped middle section and rectangular ends; through holes at both ends of the clamping plates; bolts that can pass through the through holes; and nuts connected to the ends of the bolts. The waterstop plate has multiple mounting holes spaced from top to bottom at one end near the reinforcing cage, through which the bolts can pass.

[0011] Preferably, the inner arc of the clamp is provided with a rubber pad.

[0012] Preferably, the top of the plain concrete pile and the reinforced concrete pile is provided with a continuous reinforced concrete cap beam.

[0013] Compared with the prior art, the advantages of this utility model are: 1. This utility model sets a slot on the arc-shaped notch of the plain concrete pile and fixes a waterstop plate on the steel cage of the reinforced concrete pile. The side of the waterstop plate is embedded in the slot to form a reliable water-stop barrier. This not only enhances the overall water-stopping performance of the interlocking pile, but also effectively resists micro-cracks caused by concrete solidification shrinkage, uneven settlement of the foundation or external load, thereby significantly reducing the risk of seepage. 2. This utility model further improves the water-stopping effect by setting a V-shaped protrusion structure and an expansion water-stopping sleeve on the water-stopping plate. The V-shaped protrusion can effectively extend the potential seepage path and consume water pressure to achieve efficient mechanical water-stopping. The expansion water-stopping sleeve expands in volume when it comes into contact with water, tightly fills the rectangular groove section, and forms a reliable water-stopping barrier, thereby ensuring the stability of the foundation pit and the safety of surrounding buildings and underground pipelines. 3. In this utility model, by setting a trapezoidal groove, the concrete solidifies in it to form a wedge-shaped concrete "shear key", thereby transforming the simple planar friction between the plain concrete pile and the reinforced concrete pile into an efficient mechanical embedding connection, which greatly improves the pile's ability to resist lateral earth pressure and enhances the overall stiffness and stability of the structure. 4. This utility model forms a robust mechanical interlock by connecting the T-shaped protrusion of the waterstop plate with the T-shaped groove of the expansion waterstop sleeve, ensuring that the expansion waterstop sleeve will not loosen or fall off the waterstop plate during transportation, hoisting and concrete pouring, thus guaranteeing the integrity of the sealing system. 5. This utility model provides a connector between the waterstop plate and the reinforcing cage, which allows the connector to flexibly adapt to the spacing of the main reinforcing bars in the reinforcing cage. The waterstop plate is quickly and firmly positioned by bolt tightening. The rubber pad on the inner side of the clamp plate not only increases friction and prevents loosening, but also buffers vibration and impact during construction and protects the main reinforcing bars of the reinforcing cage from being pinched, thus ensuring the integrity of the main structure. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of a composite waterproofing structure; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 A schematic diagram of a composite waterstop structure; Figure 4 This is a schematic diagram of the connection structure between a waterstop plate and a reinforcing cage in a composite waterstop structure. Figure 5 This is a schematic diagram of a connector structure for a composite waterproofing structure. Figure 6 This is a structural schematic diagram of a precast steel column; Reference numerals: 1-plain concrete pile, 2-reinforced concrete pile, 3-arc notch, 4-slot, 5-waterstop, 6-V-shaped protrusion structure, 7-expansion waterstop sleeve, 8-trapezoidal groove segment, 9-rectangular groove segment, 10-T-shaped boss, 11-T-shaped groove, 12-reinforcing cage, 13-connector, 14-through hole, 15-bolt, 16-installation hole, 17-rubber pad, 18-cap beam, 19-clamping plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] 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.

[0018] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to 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 utility model product is in use, they are only for the convenience of describing this utility model 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 of this utility model.

[0019] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it 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.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0022] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0023] like Figures 1-6As shown, a composite water-stopping structure includes plain concrete piles 1 and reinforced concrete piles 2 that are alternately arranged and interlocked. The plain concrete pile 1 has three sets of slots 4 extending vertically on the arc-shaped notch 3 on the side near the reinforced concrete pile 2. A water-stopping plate 5 is fixedly connected to the steel cage 12 of the reinforced concrete pile 2, and the side of the water-stopping plate 5 is located in the slot 4.

[0024] The plain concrete pile 1 and the reinforced concrete pile 2 are provided with a continuous reinforced concrete cap beam 18 at the top.

[0025] It should be noted that this scheme requires prefabricated steel columns with piles having the same structure as slot 4. After drilling several plain concrete pile holes, the prefabricated steel columns, coated with release agent, are hoisted into the plain concrete pile holes using positioning steel plate molds. Plain concrete is then poured. After the concrete has initially set but before its final set, the prefabricated steel columns are vertically pulled out, thus forming a regular, smooth slot 4 cavity and interlocking notch on the sidewall of the plain pile. This eliminates the need to cut the already poured plain pile concrete, reducing equipment requirements and construction difficulty. It fundamentally eliminates the cutting difficulties or piping risks caused by delayed setting failure, and avoids the risk of interlocking failure except for improper cutting timing. The prefabricated steel columns, such as… Figure 6 As shown, this technology is existing technology and will not be described in detail here.

[0026] After fixing the prefabricated waterstop 5 to the position of the reinforcing cage 12, the reinforcing cage 12 is lowered into the hole between the already constructed plain concrete piles 1. The waterstop 5 is inserted into the slot 4, and then the reinforced concrete pile 2 is poured. The side of the waterstop 5 is embedded into the slot 4 to form a reliable water-stop barrier. This not only enhances the overall water-stopping performance of the interlocking piles, but also effectively resists micro-cracks caused by concrete solidification shrinkage, uneven settlement of the foundation, or external loads, thereby significantly reducing the risk of seepage. After all the piles have reached the required strength, the soil at the top of the piles is excavated, the laitance at the pile head is removed, the reinforcing steel of the cap beam 18 is tied, the formwork is erected, and concrete is poured to form a continuous reinforced concrete cap beam 18. This connects all the piles into an integral frame, effectively coordinating the stress and deformation of each pile and preventing the failure of the waterstop joint due to excessive displacement of a single pile.

[0027] like Figure 2 As shown, the waterstop plate 5 is provided with multiple V-shaped protrusions 6, and the side of the waterstop plate 5 located on one side of the slot 4 is wrapped with an expansion waterstop sleeve 7; the slot 4 includes a connected trapezoidal groove segment 8 and a rectangular groove segment 9, and the expansion waterstop sleeve 7 is accommodated in the rectangular groove segment 9.

[0028] The trapezoidal groove segment 8 has a trapezoidal cross-section, with its long side located on the side facing the reinforced concrete pile 2, and the length of its short side being greater than the thickness of the waterstop plate 5; the rectangular groove segment 9 has a rectangular cross-section, and its width and depth are both greater than the length of the short side of the trapezoidal groove segment 8.

[0029] The concrete not only fills the two holes of the reinforced concrete piles, but also flows into and completely fills the trapezoidal slot 4 behind the waterstop 5. After solidification, it forms a strong wedge-shaped concrete "shear key" that tightly embeds the plain concrete pile 1 and the reinforced concrete pile 2 together, greatly improving the piles' ability to resist lateral earth pressure and enhancing the overall rigidity and stability of the structure. The water in the concrete permeates into the expansion waterstop sleeve 7, causing it to expand in volume. Due to the reserved gap, the waterstop sleeve can expand freely and fully, eventually tightly filling the entire rectangular slot 4 space and generating continuous compressive stress on the slot wall, forming an active seal. The V-shaped protrusion can effectively extend the potential seepage path and consume water pressure, achieving efficient mechanical waterstopping, further improving the waterstopping effect, and thus ensuring the stability of the foundation pit and the safety of surrounding buildings and underground pipelines.

[0030] like Figure 3 As shown, the waterstop plate 5 has a T-shaped protrusion 10 on one side of the slot 4, and the expansion waterstop sleeve 7 has a T-shaped groove 11 that matches the T-shaped protrusion 10; the cross-sectional dimension of the expansion waterstop sleeve 7 in its free state is smaller than the dimension of the rectangular groove segment 9.

[0031] The cross-sectional dimension of the expansion waterstop sleeve 7 in its free state is smaller than the dimension of the rectangular groove 9 it accommodates, ensuring a gap during installation. This prevents the expansion waterstop sleeve 7 from being damaged by friction or compression during insertion, ensuring the integrity of the component. The mating connection between the T-shaped boss 10 and the T-shaped groove 11 of the expansion waterstop sleeve 7 forms a robust mechanical interlock, ensuring that the expansion waterstop sleeve 7 will not loosen or fall off the waterstop plate 5 during transportation, hoisting, and concrete pouring, thus ensuring the integrity of the sealing system. When the expansion waterstop sleeve 7 encounters water again, it expands, achieving a perfect transition from "installation gap" to "interference fit," ensuring both smooth construction and the tightness of the final seal.

[0032] like Figure 4 As shown, the waterstop plate 5 is connected to the reinforcing cage 12 through multiple connectors 13. Each connector 13 includes: two symmetrically arranged clamping plates with an arc shape in the middle and rectangular ends; through holes 14 through both ends of the clamping plates; bolts 15 that can pass through the through holes 14; and nuts connected to the ends of the bolts 15. The waterstop plate 5 has multiple mounting holes 16 spaced from top to bottom near the end of the reinforcing cage 12, through which the bolts 15 can pass.

[0033] The clamp plate has a rubber pad 17 on its inner arc side.

[0034] The inner arcs of the two clamping plates are joined together from the left and right sides to the predetermined main reinforcement bars of the steel cage 12. At this time, the through holes 14 of the two clamping plates should be aligned. The bolts 15 on one side are passed through the through holes 14 of the first clamping plate, the mounting holes 16 on the waterstop plate 5, and the through holes 14 of the second clamping plate from top to bottom. The bolts 15 on the other side are passed through the through holes 14 of the first clamping plate and the through holes 14 of the second clamping plate. The nuts are manually screwed on and initially tightened to connect the connector 13 with the main reinforcement bars and the waterstop plate 5 as a whole. The connector 13 can flexibly adapt to the spacing of the main reinforcement bars of the steel cage 12. The waterstop plate 5 is quickly and firmly positioned by tightening the bolts 15. The rubber pads 17 on the inner side of the clamping plates not only increase friction and prevent loosening, but more importantly, they can buffer the vibration and impact during construction and protect the main reinforcement bars of the steel cage 12 from being pinched, thus ensuring the integrity of the main structure.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail can be made without departing from the spirit and scope of this utility model as defined in the appended claims.

Claims

1. A composite water-stopping structure, comprising alternating plain concrete piles (1) and reinforced concrete piles (2) that interlock, characterized in that: The plain concrete pile (1) has three sets of slots (4) extending vertically on the arc-shaped notch (3) on the side near the reinforced concrete pile (2). A waterstop plate (5) is fixedly connected to the steel cage (12) of the reinforced concrete pile (2), and the side of the waterstop plate (5) is located in the slot (4).

2. The composite waterproofing structure according to claim 1, characterized in that: The waterstop plate (5) is provided with multiple V-shaped protrusions (6), and the side of the waterstop plate (5) located on one side of the slot (4) is wrapped with an expansion waterstop sleeve (7); the slot (4) includes a connected trapezoidal groove segment (8) and a rectangular groove segment (9), and the expansion waterstop sleeve (7) is housed in the rectangular groove segment (9).

3. The composite waterproofing structure according to claim 2, characterized in that: The trapezoidal groove segment (8) has a trapezoidal cross-section, with its long side located on the side facing the reinforced concrete pile (2), and the length of its short side being greater than the thickness of the waterstop plate (5); the rectangular groove segment (9) has a rectangular cross-section, and its width and depth are both greater than the length of the short side of the trapezoidal groove segment (8).

4. The composite waterproofing structure according to claim 2, characterized in that: The waterstop plate (5) has a T-shaped boss (10) on one side of the slot (4), and the expansion waterstop sleeve (7) has a T-shaped groove (11) that matches the T-shaped boss (10); the cross-sectional dimension of the expansion waterstop sleeve (7) in the free state is smaller than the dimension of the rectangular groove segment (9).

5. The composite waterproofing structure according to claim 1, characterized in that: The waterstop plate (5) is connected to the reinforcing cage (12) through multiple connectors (13). The connectors (13) include: two symmetrically arranged clamps with an arc shape in the middle and rectangular ends; through holes (14) through both ends of the clamps; bolts (15) that can pass through the through holes (14); and nuts connected to the ends of the bolts (15). The waterstop plate (5) has multiple mounting holes (16) arranged from top to bottom at intervals near the end of the reinforcing cage (12). The bolts (15) can pass through the mounting holes (16).

6. The composite waterproofing structure according to claim 5, characterized in that: The inner arc of the clamp is provided with a rubber pad (17).

7. The composite waterproofing structure according to claim 1, characterized in that: The top of the plain concrete pile (1) and the reinforced concrete pile (2) is provided with a continuous reinforced concrete cap beam (18).

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