Retaining wall structure facilitating drainage

Abstract

The utility model relates to the technical field of side slope drainage, especially a retaining wall structure convenient for drainage, which comprises a filter layer, a water drainage layer, a cushion layer, a retaining wall body and a drainage assembly, the filter layer, the water drainage layer, the cushion layer and the retaining wall body are sequentially arranged outside the filling layer, the drainage assembly comprises a water diversion pipe and a drain pipe, the water diversion pipe penetrates the filter layer, one end of the water diversion pipe is arranged in the water drainage layer, and the other end of the water diversion pipe is arranged in the filling layer; the drain pipe is arranged on the retaining wall body in a penetrating mode, and one end of the drain pipe is connected through the cushion layer and the water drainage layer. In the utility model, the independent filter layer and the water drainage layer composed of large-pore block stones effectively intercept soil particles and provide a smooth collection and horizontal flow channel for water bodies. The water diversion pipe penetrating into the soil body and the drain pipe penetrating through the retaining wall form a drainage system with active guidance and staged filtration, which significantly improves the drainage efficiency and greatly reduces the risk of blockage.

Description

Technical Field

[0001] This utility model relates to the field of slope drainage technology, and in particular to a retaining wall structure that facilitates drainage. Background Technology

[0002] In engineering construction, it is common to encounter situations where retaining walls need to be built on the outside of fill layers, such as highway cutting slopes, building foundation pit backfill areas, and riverbank protection. The main function of the retaining wall is to withstand the lateral pressure of the fill and prevent soil slippage and instability. However, the fill often contains groundwater or infiltrated rainwater. If this water accumulates behind the wall, it will generate enormous hydrostatic pressure and seepage pressure, significantly increasing the load on the retaining wall and becoming one of the main causes of retaining wall overturning, slippage, or even failure.

[0003] To address this issue, the most common approach in existing technology is to install one or more rows of drainage holes at the lower part of the retaining wall. This traditional drainage method has inherent drawbacks: The drainage system is inefficient and prone to clogging. Relying solely on drainage holes at the base of the wall results in a long drainage path, requiring water to collect at the hole openings on its own. Fine particles in the backfill soil easily move with the water flow, gradually clogging the drainage holes and causing a rapid decline in drainage efficiency. Utility Model Content

[0004] In view of the technical problems existing in the background art, the utility model provides a retaining wall structure that facilitates drainage, so as to solve the above-mentioned problems.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A retaining wall structure for easy drainage includes a filter layer, a hydrophobic layer, a pad layer, a retaining wall body, and a drainage component. The filter layer, hydrophobic layer, pad layer, and retaining wall body are sequentially arranged outside the backfill layer. The drainage component includes a water inlet pipe and a water outlet pipe. The water inlet pipe passes through the filter layer, with one end located inside the hydrophobic layer and the other end located inside the backfill layer. The water outlet pipe is installed through the retaining wall body, with one end passing through the pad layer and connecting to the hydrophobic layer.

[0006] Preferably, the filter layer has a number of filter holes evenly distributed on it for separating water and sand.

[0007] As a preferred option, the hydrophobic layer is a layer of accumulated boulders.

[0008] Preferably, a number of through holes are provided at the lower end of the pad layer, and the drain pipe is connected to the through holes.

[0009] Preferably, the retaining wall structure is provided with several anchor rods, which pass through the filter layer, the hydrophobic layer, the pad layer and the retaining wall body and extend into the backfill layer.

[0010] Preferably, the surface of the water pipe is provided with several water inlet holes, and the drinking water holes penetrate the water pipe.

[0011] Preferably, a number of connecting rods are provided on the hydrophobic layer, with one end of the connecting rod passing through the pad layer and the other end passing through the filter layer and extending into the backfill layer.

[0012] This utility model has the following advantages and beneficial effects: Highly efficient drainage and reliable clogging prevention: By setting up an independent filter layer and a hydrophobic layer composed of large-pore stones, soil particles are effectively intercepted while providing unobstructed collection and horizontal flow channels for water. Combined with water inlet pipes that penetrate deep into the soil and drainage pipes that run through the retaining wall, an active guidance and tiered filtration drainage system is formed, which significantly improves drainage efficiency and greatly reduces the risk of clogging. Attached Figure Description

[0013] Figure 1 A cross-sectional view of the connecting rod of a retaining wall structure that facilitates drainage, as proposed in this utility model; Figure 2 A cross-sectional view of the water inlet pipe of a retaining wall structure for easy drainage proposed in this utility model; Figure 3 for Figure 1 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of the water pipe of a retaining wall structure that facilitates drainage, as proposed in this utility model.

[0014] Attached reference numerals: 1-fill layer, 2-filter layer, 3-drainage layer, 4-base plate layer, 41-through hole, 42-groove, 5-retaining wall body, 61-water pipe, 611-water inlet hole, 62-drainage pipe, 7-anchor bolt, 8-connecting rod. Detailed Implementation

[0015] 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 some embodiments of this utility model, but not all embodiments.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] Example like Figures 1-4As shown, a retaining wall structure for easy drainage includes a filter layer 2, a hydrophobic layer 3, a pad layer 4, a retaining wall body 5, and a drainage assembly. The filter layer 2, hydrophobic layer 3, pad layer 4, and retaining wall body 5 are arranged in a layered structure outside the backfill layer 1. The drainage assembly is used to guide water in the backfill layer 1 to the outside of the retaining wall, and includes a water inlet pipe 61 and a drainage pipe 62.

[0018] like Figures 1-3 As shown, filter layer 2 is made of geotextile and is tightly attached to the outer surface of fill layer 1. Filter layer 2 has a large number of fine filter pores evenly distributed on it. These pores allow water to pass through, but can effectively intercept fine soil particles in fill layer 1, preventing particles from entering subsequent drainage channels and causing siltation.

[0019] Several connecting rods 8 are also provided in the hydrophobic layer 3. The connecting rods 8 are preferably made of high-strength and corrosion-resistant materials, such as hot-rolled steel bars. One end of the connecting rod 8 passes through the filter layer 2 and extends into the backfill layer 1. In the early stage of construction, when the filter layer 2 is made of flexible geotextile material, the rod body of the connecting rod 8 can form a reliable anchor point for the geotextile laid on it, which can effectively tension and fix the geotextile, preventing it from wrinkling or shifting during laying and backfilling. This ensures that the filter layer 2 is flatly attached to the surface of the backfill layer 1, ensuring the uniformity and effectiveness of its filtration function.

[0020] The drainage layer 3, adjacent to the outer side of the filter layer 2, is composed of large-diameter boulders. The gaps between the boulders form continuous, large-aperture water channels, providing excellent horizontal collection and flow capacity for water seeping from the filter layer 2. The thickness of the drainage layer 3 is determined according to the drainage requirements to ensure sufficient space for water collection. Simultaneously, the connecting rod 8 penetrates the drainage layer 3, effectively constraining the surrounding boulders and significantly reducing relative movement caused by vibration and pressure changes during construction, backfilling, or use. This ensures that the drainage layer 3 maintains its stable porous structure and high water conductivity as a whole. The connecting rod 8 strengthens the connection between the drainage layer 3, the base layer 4, and the underlying soil, preventing excessive relative displacement between layers due to external forces or their own weight, and ensuring the long-term stability of the drainage channel.

[0021] The base plate layer 4 is placed between the drainage layer 3 and the retaining wall body 5. The base plate layer 4 is an externally precast reinforced concrete slab, manufactured in a factory to better ensure its strength and quality. During the prefabrication of the base plate layer 4, several grooves 42 are pre-cut on its surface facing the drainage layer 3. The position and size of these grooves 42 precisely correspond to the diameter and distribution of the connecting rods 8. During construction, after one end of the connecting rod 8 is anchored to the backfill layer 1, the base plate layer 4 is installed. During installation, the operator only needs to align the grooves 42 on the base plate layer 4 and fit it into the fixed connecting rod 8 to achieve rapid and accurate horizontal positioning of the base plate layer 4. This effectively avoids errors in on-site measurement and ensures accurate alignment of the through holes 41 on the base plate layer 4 with the drainage pipe 62 and the entire structural layer. The base plate layer 4 mainly serves to transmit earth pressure and support the retaining wall body 5.

[0022] After the base plate layer 4 is positioned and secured by connecting rods 8, rubble is filled into the cavity between the base plate layer 4 and the filter layer 2 to form the drainage layer 3. This construction sequence ensures that the base plate layer 4 is already in the designed position when the rubble is filled, providing a stable outer boundary for the drainage layer 3. This facilitates the compaction of the rubble through vibration and other methods, preventing voids. The base plate layer 4 mainly serves to transmit soil pressure and support the retaining wall body 5.

[0023] The retaining wall body 5 is a masonry or cast-in-place concrete structure and is the main load-bearing component for retaining soil. In the lower part of the pad layer 4, one or more through holes 41 are provided for installing drainage pipes 62 of the drainage components. The drainage pipes 62 penetrate the wall of the retaining wall body 5, and their inner ends extend into the drainage layer 3 through the through holes 41 on the pad layer 4, while their outer ends extend out of the outer surface of the retaining wall body 5 to discharge the collected water to the external environment.

[0024] like Figures 1-4 As shown, the water inlet pipe 61 of the drainage component is a perforated pipe with several water inlet holes 611 evenly distributed circumferentially and axially on its pipe wall. The water inlet holes 611 penetrate the water inlet pipe 61. One end of the water inlet pipe 61 passes through the filter layer 2 and extends a certain distance into the backfill layer 1, while the other end extends into the drainage layer 3. The end that extends into the soil is responsible for actively collecting free water in the backfill layer 1, which enters the pipe through the water inlet holes 611, and then is introduced into the drainage layer 3.

[0025] Water deep within the fill layer 1 enters the water inlet pipe 61 through the water inlet hole 611 and is directly introduced into the drainage layer 3; while water from the side of the fill layer 1 is first treated by the filter layer 2 before entering the drainage layer 3. After the two water flows converge in the drainage layer 3, they are discharged together through the drainage pipe 62.

[0026] Several anchor rods 7, made of high-strength steel bars, are installed on the retaining wall structure. These anchor rods pass sequentially through the retaining wall body 5, the pad layer 4, the drainage layer 3, and the filter layer 2, ultimately anchoring in the deep, stable fill layer 1 or bedrock. It is important to note that these anchor rods 7 are not pre-embedded components, but rather post-construction reinforcement components installed after the filter layer 2, drainage layer 3, pad layer 4, and retaining wall body 5 are constructed. The construction steps are as follows: First, a drilling rig is used to drill holes from the outer surface of the retaining wall body 5 at the designed angle, penetrating the pad layer 4, drainage layer 3, and filter layer 2 sequentially, ultimately reaching a stable depth within the front fill layer 1. Then, the anchor rods 7 (usually high-strength threaded steel bars) are inserted into the drilled holes, and cement grout is injected into the holes to firmly bond the anchor rods 7 to the surrounding soil and structure. Finally, anchorages are installed at the exposed ends of the anchor rods 7 and tensioned and locked, thereby applying an active prestress directed towards the soil behind the wall to the constructed retaining wall structure. These later-installed anchor bolts 7 tightly connect each layer of structure with the internal soil into a whole, significantly improving the retaining wall's resistance to sliding and overturning. They are especially suitable for reinforcing existing retaining walls or ensuring structural safety under complex geological conditions.

[0027] This retaining wall structure uses a filter layer 2 to initially filter lateral seepage water, and uses a water pipe 61 to actively guide water accumulated deep in the fill layer 1. The two flow into the drainage layer 3 for collection and horizontal conduction, and finally are discharged outside the wall by the drainage pipe 62, thus forming a well-defined, efficient and reliable drainage system.

[0028] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A retaining wall structure that facilitates drainage, characterized in that, The structure includes a filter layer, a hydrophobic layer, a base plate layer, a retaining wall body, and a drainage component. The filter layer, hydrophobic layer, base plate layer, and retaining wall body are sequentially arranged outside the backfill layer. The drainage component includes a water inlet pipe and a water outlet pipe. The water inlet pipe passes through the filter layer, with one end located inside the hydrophobic layer and the other end located inside the backfill layer. The water outlet pipe is installed through the retaining wall body, with one end passing through the base plate layer and connecting to the hydrophobic layer.

2. The retaining wall structure for easy drainage according to claim 1, characterized in that, The filter layer has a number of filter holes evenly distributed on it for separating water and sand.

3. The retaining wall structure for easy drainage according to claim 1, characterized in that, The hydrophobic layer is a layer of accumulated boulders.

4. The retaining wall structure for easy drainage according to claim 1, characterized in that, Several through holes are provided at the lower end of the pad layer, and the drain pipe is connected to the through holes.

5. A retaining wall structure for easy drainage according to claim 1, characterized in that, The retaining wall structure is equipped with several anchor rods, which pass through the filter layer, the drainage layer, the pad layer and the retaining wall body and extend into the backfill layer.

6. A retaining wall structure for easy drainage as described in claim 1, characterized in that, The surface of the water pipe is provided with several water inlet holes, which penetrate the water pipe.

7. A retaining wall structure for easy drainage according to claim 1, characterized in that, Several connecting rods are provided on the hydrophobic layer. One end of each connecting rod passes through the pad layer, and the other end passes through the filter layer and extends into the backfill layer.

8. A retaining wall structure for easy drainage according to claim 1, characterized in that, The base plate layer is a reinforced concrete slab.

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