A deformation self-adaptive anti-seepage structure of a dike connecting section

Abstract

The utility model discloses a kind of deformation self-adapting anti-seepage structures of embankment linking section, including embankment, embankment crossing building, the side pier both sides of embankment crossing building located in embankment are provided with concrete spur wall, concrete spur wall outside and intermediate position are reserved with notch, flat plate type plastic steel sheet pile is horizontally inserted into notch and is set, the undisturbed soil layer of embankment is formed with undisturbed soil layer by in-situ mixing, wave type plastic steel sheet pile is horizontally inserted into undisturbed soil layer by in-situ mixing, flat plate type plastic steel sheet pile and wave type plastic steel sheet pile are flexibly linked to form composite anti-seepage structure type by using lock catch, can solve linking section leakage problem, improve engineering full life cycle safety, with deformation coordination, construction controllability and anti-seepage reliability and other technical features.

Description

Technical Field

[0001] This utility model relates to the technical field of seepage prevention structure for water conservancy engineering dikes, specifically to an adaptive seepage prevention structure that achieves deformation coordination between dikes and intersecting structures through an embedded transition connection section. It is applicable to seepage prevention treatment of the connection section between earthen dikes and intersecting structures such as sluice gates, pumping stations, and culverts. Background Technology

[0002] Currently, most domestic earthen embankment projects use clay filling, and the transition between these structures and intersecting structures (such as sluice gates, pumping stations, and culverts) is often achieved directly using the same clay material. However, this traditional connection method has certain structural defects. Intersecting structures along the embankment mainly include sluice gates, pumping stations, and culverts. These structures require soft soil foundation reinforcement to improve their bearing capacity, while the embankment, as a linear engineering project, has a relatively low settlement control standard. Differential settlement between the two structures can easily lead to voids and cracks in the connection section, forming contact seepage channels.

[0003] Problems such as insufficient soil compaction at the joint section, aging of the water-stop structure, or interface voids are frequent. Furthermore, traditional concrete cutoff walls suffer from poor deformation adaptability, high cost, and difficult construction, making them unsuitable for complex seepage control requirements. Existing technologies rely on single cutoff wall reinforcement, but are limited by poor deformation coordination between the concrete and soil interface, and the construction process is prone to disruption of seepage continuity due to insufficient equipment adaptability, failing to effectively solve the leakage problem at the joint section. Therefore, there is an urgent need for a new type of seepage control structure that combines deformation coordination, construction controllability, and seepage control reliability to systematically solve the leakage problem at the joint section of the dike and improve the safety of the entire project lifecycle. Utility Model Content

[0004] In response to the problems of seepage damage caused by differential settlement at the connection points between existing soil embankments and intersecting structures, and the poor deformation adaptability of traditional seepage prevention structures, this utility model aims to provide a deformation-adaptive seepage prevention structure for embankment connection points. By combining flexible and rigid materials and multi-structure collaboration, it systematically solves the leakage problem at the connection points, improves the safety of the entire project life cycle, and has the advantages of deformation coordination, construction controllability, and seepage prevention reliability.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] This utility model discloses a deformation-adaptive seepage-proof structure for a dike connection section, comprising a dike and some dike intersection structures located within the dike, and further including flat plastic steel sheet piles, corrugated plastic steel sheet piles, and concrete spiked walls. Concrete spiked walls are respectively installed on both sides of the side piers of the dike intersection structures located within the dike. The concrete spiked walls are thin concrete wall structures perpendicular to the side piers of the dike intersection structures and extending into the dike body. The concrete spiked walls are arranged parallel to the dike axis, located in the middle of the side piers, with their bottom at the same elevation as the bottom slab of the intersection structure and their top extending to the dike top road surface structure. A groove is pre-reserved on the outer side and in the middle of the concrete spiked walls. The flat plastic steel sheet piles are horizontally inserted into the groove. The original soil layer of the dike is in-situ mixed to form an in-situ mixed and solidified soil layer. The corrugated plastic steel sheet piles are horizontally inserted into the in-situ mixed and solidified soil layer. The flat plastic steel sheet piles and the corrugated plastic steel sheet piles are flexibly connected by interlocking to form a composite seepage-proof structure.

[0007] The construction process is as follows: First, concrete spiked walls are installed on both sides of the piers of the intersecting structures. These spiked walls are arranged parallel to the embankment axis, located in the middle of the piers, with their bottom at the same elevation as the bottom slab of the intersecting structure and their top extending to the embankment top pavement structure. A groove, 1.5m deep and 10cm wide, is pre-reserved in the middle of the concrete spiked wall near the embankment side. Flat plastic-steel sheets are vertically inserted into the groove. The original embankment soil is first mixed in situ to form an in-situ mixed and solidified soil layer. Then, corrugated plastic-steel sheet piles are inserted to form a composite seepage-proof structure. The flat plastic-steel sheets and corrugated plastic-steel sheet piles are flexibly connected using interlocking. The gaps in the concrete spiked wall grooves are filled with an SR flexible filler layer. With the end of the concrete spiked wall as the centerline, a clay outer layer is used for backfilling within a certain range on both sides. After the lower pouring and backfilling are completed, a concrete slab is installed at the top of the joint between the intersecting structure and the embankment. This slab is made of cast-in-place thin concrete and hinged at both ends, resting on the piers of the intersecting structure and the embankment respectively. The structures that cross the dike are sluice gates, pumping stations, culverts and other structures arranged on the dike, which is a homogeneous earthen dike.

[0008] Preferably, the grooves of the concrete spiked wall are filled with an SR flexible filler layer, and the SR flexible filler layer wraps around the flat plastic steel sheet pile.

[0009] The SR flexible filler is a grouting material between the concrete splinter wall groove and the flat plastic steel sheet pile, which meets the seepage prevention requirements and can coordinate the flexible structure of uneven deformation.

[0010] Preferably, the groove end face of the concrete spiked wall is used as the baseline, and a clay outer layer is backfilled on both sides of the baseline; the clay outer layer covers part of the outer surface of the concrete spiked wall and part of the outer surface of the in-situ mixed and solidified soil layer.

[0011] The clay outer layer serves as the upstream and downstream outer layer material at the connection between the corrugated plastic steel sheet pile and the concrete spiked wall, strengthening the seepage prevention structure at the contact point and improving the seepage prevention at the connection between the dike and the intersecting structures.

[0012] Preferably, the connection between the flat plastic steel sheet pile and the corrugated plastic steel sheet pile is located within the clay outer layer.

[0013] Preferably, a concrete slab is provided at the top of the joint between the dike intersection structure and the dike. The two ends of the concrete slab are respectively placed on the side piers of the dike intersection structure and the dike, in order to solve the road surface subsidence and cracks caused by uneven settlement.

[0014] Concrete slabs are rigid structures installed at the top of the joint between the embankment and the intersecting structure. One end rests on the side pier of the intersecting structure, and the other end is located on the embankment. They can solve the problem of road surface subsidence and cracks caused by uneven settlement.

[0015] Preferably, the concrete slab is a cast-in-place thin concrete slab.

[0016] Preferably, the groove has a depth of 1.5m and a width of 10cm.

[0017] Beneficial effects: Seepage prevention and safety: The combination of flexible plastic-steel sheet piles and rigid concrete spiked walls creates a composite seepage prevention structure that adapts to uneven deformation, preventing gaps and cracks at the joints; the clay outer layer reinforces contact seepage prevention, and the multi-structure synergy enhances seepage prevention capabilities; Construction controllability: The pre-reserved grooves in the concrete spiked walls facilitate the embedding of plastic-steel sheet piles, and the in-situ mixing and solidification of the soil simplifies construction. The overall structural construction difficulty is lower than that of traditional seepage barriers, ensuring continuous seepage prevention and improving project safety; Cost advantage: Compared to traditional concrete seepage barriers, this structure has lower material and construction costs, ensuring reliable seepage prevention while maintaining good economic efficiency and reducing project costs. Attached Figure Description

[0018] Figure 1 This is a plan view of the utility model.

[0019] Figure 2 This is a cross-sectional view of this utility model (I-I).

[0020] Figure 3 This is a partial structural diagram of the seepage-proof connection of this utility model.

[0021] In the diagram: 1-Plastic steel sheet pile; 11-Flat plastic steel sheet pile; 12-Wave plastic steel sheet pile; 2-Concrete spiked wall; 3-In-situ mixed and solidified soil layer; 4-SR flexible filler layer; 5-Clay outer layer; 6-Concrete slab; 7-Intersecting structure; 8-Elevation. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0024] The inventive point of this utility model's technical solution:

[0025] This utility model focuses on the seepage prevention problem at the junction of dikes and intersecting structures, and the core technical solution is built around "deformation self-adaptation + composite seepage prevention synergy".

[0026] Structural Coordination and Adaptation: The concrete spiked wall 2 serves as a rigid foundation, vertically embedded in the side piers of the intersecting buildings and parallel to the embankment axis, with a reserved slot for adapting to the flat plastic steel sheet pile 11; combined with the in-situ mixed and solidified soil layer 3 and the corrugated plastic steel sheet pile 12 to form a composite seepage prevention, and using flexible locking to connect the flat plate and the corrugated plastic steel sheet pile to adapt to uneven deformation.

[0027] Multi-layer seepage prevention reinforcement: SR flexible filler layer 4 fills the gaps in the groove to achieve "flexible seepage prevention + deformation coordination"; clay outer layer 5 covers the key connection surface to strengthen contact seepage prevention; concrete slab 6 solves the problem of road surface settlement and cracking, and constructs a full-process seepage prevention and protection system from "underground to surface".

[0028] Construction controllability design: Concrete spiked wall 2 is constructed simultaneously with intersecting buildings, and pre-reserved slots simplify the installation of plastic steel sheet piles; in-situ mixing and solidification of soil layer 3, staged backfilling and on-site casting of slabs reduce construction difficulty and ensure the continuity of seepage prevention and the integrity of the structure.

[0029] Example 1: Specific construction process of a deformation-adaptive seepage prevention structure for dike connection sections:

[0030] Construction preparation phase: Based on the design drawings of embankment 8 and intersecting structure 7, clarify the dimensions and geological parameters of the connection section, plan the location of concrete spike wall 2 (both sides of the side pier, parallel to the embankment axis), and the trench parameters (depth 1.5m, width 10cm). Select the specifications of materials such as plastic steel sheet piles (flat plate 11, corrugated type 12), SR flexible filler 4, clay outer layer 5, and concrete slab 6. Prepare concrete pouring equipment, soil mixing and solidification equipment (such as deep mixing pile machine), and plastic steel sheet pile installation machinery.

[0031] Construction process of the main structure: Concrete spike wall 2 is constructed on both sides of the pier of the intersecting structure 7. Formwork is erected according to the design axis and dimensions, and concrete is poured to form concrete spike wall 2, ensuring its bottom is at the same elevation as the bottom slab of the intersecting structure and its top extends to the road surface at the top of the embankment. Simultaneously, a groove with a depth of 1.5m and a width of 10cm is reserved in the middle position. After the concrete has cured to the design strength, the formwork is removed, and debris in the groove is cleaned. Plastic steel sheet pile installation and composite seepage prevention structure construction: Flat plastic steel sheet pile 11 installation: Using hoisting equipment, the flat plastic steel sheet pile 11 is horizontally inserted into the groove of the concrete spike wall 2. Verticality and position are adjusted to ensure that the groove is filled after segmented installation. Construction of in-situ mixed and solidified soil layer 3 and corrugated plastic steel sheet piles 12: For the original soil of the connecting section of the embankment 8, a deep mixing pile machine is used to mix in-situ according to the design range and depth, and a curing agent can be injected to form in-situ mixed and solidified soil layer 3; before the soil has a certain strength, the corrugated plastic steel sheet piles 12 are horizontally inserted into the in-situ mixed and solidified soil layer 3, and the insertion depth and spacing are controlled.

[0032] Flexible Connection: The flat plastic steel sheet pile 11 and the corrugated plastic steel sheet pile 12 are flexibly connected through a locking device to form a continuous composite seepage prevention structure. The corrugated plastic steel sheet pile 12 adopts a corrugated cross-section to increase the contact area, so that the plastic steel sheet pile and the soil generate greater frictional resistance and mechanical interlocking effect. It is connected to the flat plastic steel sheet pile 11 with a flexible locking device. SR Flexible Filler 4 Filling and Clay Outer Layer 5 Construction: SR Flexible Filler 4 is filled into the gaps of the concrete spiked wall 2 groove to wrap the flat plastic steel sheet pile 11, ensuring that the filler is dense and seamless, and playing a role in seepage prevention and deformation coordination. Construction of the clay outer layer: Taking the end face of the concrete spiked wall 2 trench as the baseline, backfill trenches are excavated on both sides according to the design range. Clay is backfilled to form the clay outer layer 5 (the filling requirements and indicators are higher than those of the embankment soil filling. The clay outer layer 5 serves as the outer anti-seepage structure of the connecting section, which strengthens the anti-seepage connection and improves the anti-seepage effect of the connection between the embankment and the intersecting structures). The clay outer layer 5 wraps part of the outer surface of the concrete spiked wall 2, the outer surface of the in-situ mixed and solidified soil layer 3 (the embankment soil is mixed in situ, and the in-situ mixed and solidified soil serves as the transition material between the embankment soil and the corrugated plastic steel sheet piles. The anti-seepage effect is better after the composite). The layer is compacted in layers at the connection between the flat plate and the corrugated plastic steel sheet piles, and the filling indicators are controlled to be higher than those of the embankment soil. After the underground structure construction is completed and the settlement is stable, the concrete approach slab 6 is constructed by setting up formwork on the top of the joint between the intersecting building 7 and the embankment 8, and then casting concrete to form the concrete approach slab 6. It is ensured that both ends of the concrete approach slab 6 are placed on the side piers of the intersecting building 7 and the embankment 8 respectively, and a hinged structure is adopted (such as setting a pre-embedded hinge seat). After pouring, it is cured to the design strength.

[0033] Finally, it should be noted that this utility model is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A deformation-adaptive seepage-proof structure for a dike connection section, comprising a dike (8) and a portion of a dike-crossing structure (7) located within the dike (8), characterized in that, It also includes flat plastic steel sheet piles (11), corrugated plastic steel sheet piles (12), and concrete spike walls (2); concrete spike walls (2) are respectively set on both sides of the side piers of the cross structure (7) of the dike (8). The concrete spike walls (2) are arranged parallel to the axis of the dike (8). A slot is reserved on the outer side and in the middle of the concrete spike walls (2). The flat plastic steel sheet piles (11) are horizontally inserted into the slots. The original soil layer of the dike (8) is mixed in situ to form an in-situ mixed and solidified soil layer (3). The corrugated plastic steel sheet piles (12) are horizontally inserted into the in-situ mixed and solidified soil layer (3). The flat plastic steel sheet piles (11) and the corrugated plastic steel sheet piles (12) are connected by interlocking to form a composite seepage prevention structure.

2. The adaptive seepage prevention structure for the deformation of a dike connection section according to claim 1, characterized in that, The groove of the concrete spiked wall (2) is filled with an SR flexible filler layer (4), and the SR flexible filler layer (4) wraps around the flat plastic steel sheet pile (11).

3. The adaptive seepage prevention structure for the deformation of a dike connection section according to claim 2, characterized in that, Using the groove end face of the concrete spiked wall (2) as the baseline, a clay outer layer (5) is backfilled on both sides of the baseline; the clay outer layer (5) covers part of the outer surface of the concrete spiked wall (2) and part of the outer surface of the in-situ mixed and solidified soil layer (3).

4. The adaptive seepage prevention structure for the deformation of the dike connection section according to claim 3, characterized in that, The connection between the flat plastic steel sheet pile (11) and the corrugated plastic steel sheet pile (12) is located inside the clay outer layer (5).

5. A deformation-adaptive seepage-proof structure for dike connection sections according to claim 1, 2, 3, or 4, characterized in that, A concrete slab (6) is installed at the top of the joint between the dike intersection structure (7) and the dike (8). The two ends of the concrete slab (6) are respectively placed on the side pier of the dike intersection structure (7) and the dike (8) to solve the road surface subsidence and cracks caused by uneven settlement.

6. The adaptive seepage prevention structure for the deformation of a dike connection section according to claim 5, characterized in that, The concrete slab (6) is made of cast-in-place thin concrete slab.

7. The adaptive seepage prevention structure for the deformation of a dike connection section according to claim 1, characterized in that, The groove is 1.5m deep and 10cm wide.

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