Waterproof diversion blind ditch structure of diaphragm wall joint

Abstract

The utility model relates to a waterproof flow guide blind ditch structure at the connecting place of diaphragm wall, it includes flow guide blind ditch main part, flow guide blind ditch main part sets up at the connecting place of diaphragm wall, is used for guiding the ground water flow, prevents the ground water and accumulates at the connecting place, the utility model discloses a flow guide blind ditch is established, effectively guides the ground water flow, prevents the ground water and accumulates at the connecting place, reduces the seepage risk, improves the overall waterproof performance of diaphragm wall, guarantees the engineering quality. The application still has the advantages such as convenient construction, low cost, can satisfy the efficient and economic demand of modern underground engineering construction.

Description

Technical Field

[0001] This utility model relates to the field of building engineering, specifically a waterproof drainage blind ditch structure at the connection of a diaphragm wall. Background Technology

[0002] In the field of civil engineering, diaphragm walls, as an important underground support structure, are widely used in underground projects such as subway stations and multi-pit connections. However, waterproofing at diaphragm wall joints has always been a challenge in construction. Current waterproofing measures at diaphragm wall joints are often inadequate, allowing groundwater to accumulate and causing leakage, thus affecting the overall waterproofing performance and project quality of the diaphragm wall.

[0003] With the acceleration of urban renewal and construction, the development and utilization of underground space is becoming increasingly widespread, such as the integration of urban complexes with rail transit. In these projects, waterproofing at the diaphragm wall joints is crucial, directly affecting the safety and durability of the project. In areas rich in groundwater, efficient drainage measures are needed during construction to prevent groundwater accumulation. However, existing drainage methods often have the following problems:

[0004] Inadequate waterproofing: Traditional waterproofing measures at the junction of diaphragm walls usually require complex construction steps, such as laying multiple layers of waterproofing materials and designing complex drainage systems. These steps not only increase the difficulty of construction, but may also lead to longer construction time and increased costs.

[0005] Poor adaptability: In areas with abundant groundwater and complex geological conditions, traditional waterproofing measures are difficult to effectively address the problem. For example, in projects such as subway stations and multi-pit connections, the problem of groundwater accumulation is particularly prominent, and traditional waterproofing measures are insufficient to meet construction requirements.

[0006] Construction efficiency and cost control: In actual construction, construction companies need to consider not only waterproofing performance, but also construction efficiency and cost. Utility Model Content

[0007] The present invention aims to overcome the defects of the prior art and provide a waterproof drainage blind ditch structure at the connection of diaphragm wall, thereby solving the problem of waterproofing at the connection of diaphragm wall.

[0008] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0009] A waterproof drainage ditch structure at the connection of diaphragm walls is characterized in that: it includes a drainage ditch body, which is set at the connection of adjacent diaphragm walls to guide the flow of groundwater and prevent the accumulation of groundwater at the connection.

[0010] The waterproof drainage ditch structure at the connection of the diaphragm wall is characterized in that: the main body of the drainage ditch includes a galvanized steel pipe and a PE pipe, the galvanized steel pipe serves as the outer skeleton of the main body of the drainage ditch and provides structural support; the PE pipe is located above the galvanized steel pipe and is combined with the galvanized steel pipe to jointly form the main body of the drainage ditch; the cross-sectional shape of the main body of the drainage ditch is arc-shaped or trapezoidal.

[0011] The waterproof drainage blind ditch structure at the connection of the diaphragm wall is characterized in that: the PE pipe is densely covered with small holes and the outer layer is wrapped with fine gauze to form a drainage channel.

[0012] The waterproof drainage ditch structure at the connection of the diaphragm wall is characterized in that it further includes a filter structure, which is integrated into the main body of the drainage ditch and is used to filter impurities in the groundwater.

[0013] The waterproof drainage blind ditch structure at the connection of the diaphragm wall is characterized in that: the filtration structure includes multiple filtration layers, which are set inside the PE pipe or between the outer fine gauze and the PE pipe, for filtering impurities such as mud and sand in the groundwater.

[0014] The waterproof drainage ditch structure at the connection of the diaphragm wall is characterized in that: the main body of the drainage ditch is set at the bottom of the base plate at the connection of the diaphragm wall, and special concrete is poured on the top of the main body of the drainage ditch.

[0015] The waterproof drainage ditch structure at the diaphragm wall connection is characterized in that: a triaxial cement mixing pile is provided on the outer side of the drainage ditch body to reinforce the trench wall, thereby enhancing the stability of the diaphragm wall connection.

[0016] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a waterproof drainage blind ditch structure at the connection of diaphragm walls. Firstly, in terms of engineering quality, by setting up the drainage blind ditch, the flow of groundwater is effectively guided, and the accumulation of groundwater at the connection of diaphragm walls is prevented, thereby significantly reducing the risk of leakage, greatly improving the overall waterproof performance of the diaphragm wall, and ensuring the reliability of engineering quality.

[0017] Secondly, this technology also demonstrates its advantages in terms of construction progress. A well-designed drainage structure prevents construction delays caused by groundwater issues, and the drainage ditch can quickly remove groundwater, creating a dry working environment for subsequent construction. This makes the construction process smoother, thereby accelerating the project progress and improving construction efficiency.

[0018] Furthermore, from an engineering cost perspective, the application of this technology also brings substantial benefits. By reducing the costs of later maintenance and leakage treatment, and indirectly lowering engineering costs through improved construction efficiency, the overall economic benefits of the project are significantly enhanced.

[0019] In terms of structural stability, the pre-reserved steel reinforcement connections and steel bracing enhance the overall stability of the diaphragm wall connection, provide reliable temporary support, ensure structural safety during construction, and provide strong support for the smooth progress of the project.

[0020] Meanwhile, the trench walls were reinforced using triaxial cement mixing piles, which further improved the load-bearing capacity and stability of the diaphragm wall connection, making the entire structure more robust and durable and extending the service life of the project.

[0021] The unique structural design and multi-layer filtration structure of the drainage blind drain body ensure effective drainage and prevent impurities such as silt from clogging the blind drain, thus guaranteeing smooth drainage and providing a reliable guarantee for the effective removal of groundwater.

[0022] In terms of ease of construction, the drainage ditch is made of prefabricated components that are assembled on-site, which greatly reduces the difficulty and time of construction, improves construction efficiency, and makes the whole construction process more efficient and faster. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of the structure of this application.

[0025] Figure 2 This is a schematic diagram of the main body of the drainage blind ditch. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0027] like Figure 1 , 2 As shown: A waterproof drainage ditch structure at the connection of a diaphragm wall includes a drainage ditch body 5, which is set at the connection of the diaphragm wall to guide the flow of groundwater and prevent groundwater from accumulating at the connection, thereby reducing the risk of leakage.

[0028] The main body of the drainage ditch comprises a galvanized steel pipe and a PE pipe. The galvanized steel pipe serves as the outer skeleton of the drainage ditch, providing structural support. The PE pipe is positioned above the galvanized steel pipe and, together with it, forms the main body of the drainage ditch. The cross-sectional shape of the main body of the drainage ditch is arc-shaped or trapezoidal. This increases drainage capacity, better adapts to the space constraints at the diaphragm wall connection, and ensures efficient drainage within a limited space.

[0029] The PE pipe has small holes inside and is wrapped with fine gauze on the outside to form a flow channel.

[0030] The diameter of the small holes in the PE pipe 9 is 2-5 mm, and the distribution density of the small holes is 5-10 per square centimeter.

[0031] The galvanized steel pipe 8 has a diameter of DN50, and the PE pipe 9 has a diameter of DN25. This material has good corrosion resistance and mechanical strength, which can effectively protect the internal PE pipe and extend the service life of the drainage blind ditch.

[0032] Furthermore, it also includes a filtration structure, which is integrated into the main body of the drainage ditch to filter impurities in the groundwater.

[0033] The filtration structure comprises multiple filter layers, which are disposed inside the PE pipe or between the outer layer of fine cloth and the PE pipe. These layers filter impurities such as silt from the groundwater, effectively preventing them from entering the blind drain and avoiding blockage, thus ensuring the long-term smooth operation of the drainage system. The filter layer material is selected from corrosion-resistant and wear-resistant materials to ensure a durable and stable filtration effect.

[0034] Furthermore, the drainage drains are made of corrosion-resistant, wear-resistant, and high-compressive-strength materials, such as polymer materials or composite materials. These materials can not only withstand various physical and chemical effects in the underground environment, but also ensure the stability and durability of the drainage drains during long-term use.

[0035] The main body of the drainage blind ditch is set at the bottom of the base plate at the connection of the diaphragm wall 7, and a special concrete 1 is poured on top of the main body of the drainage blind ditch. The special concrete has the characteristics of high-efficiency waterproofing and low expansion rate.

[0036] The two ends of the main body of the drainage ditch are respectively connected to drainage pipes, which extend to the drainage system outside the diaphragm wall 7 to guide groundwater to the external drainage system.

[0037] The outer side of the main body of the drainage blind ditch is reinforced with triaxial cement mixing piles 6 to enhance the stability of the diaphragm wall 7 connection.

[0038] The drainage blind drains are prefabricated and assembled on-site. This construction method is simple and quick, reducing the complexity and time cost of on-site construction while improving construction efficiency.

[0039] Construction steps for connecting to the diaphragm wall:

[0040] 1. Removal of diaphragm walls: When connecting the sub-foundation pits, first remove the diaphragm walls down to the bottom of the foundation slab before connecting the basement, and install drainage blind ditches (as shown in the attached document). Figure 1 (As shown).

[0041] 2. Connecting reinforcement bars: Connect the reserved portion 2 of the existing bottom slab reinforcement bars on both sides of the diaphragm wall.

[0042] 3. Reinforcement measures: Retain the steel replacement support 4 and the three-axis cement mixing pile 6 for trench wall reinforcement to ensure structural stability during construction.

[0043] 4. Pouring special concrete: Pouring special concrete with high waterproofing efficiency and low expansion rate to further improve waterproofing performance.

[0044] 5. Waterproofing material application: Finally, apply high-performance waterproofing material 3 to ensure the waterproofing effect of the entire connection.

[0045] The specific implementation steps are as follows:

[0046] Construction of drainage blind drains:

[0047] DN50 galvanized steel pipe is used as the outer protective pipe.

[0048] Small holes are densely packed on the surface of the DN25PE pipe, and it is wrapped with fine gauze to prevent mud and sand from entering.

[0049] Connect the wrapped PE pipe to the galvanized steel pipe to form a drainage blind ditch.

[0050] Construction process:

[0051] At the junction of the diaphragm wall, the soil is chiseled down to the bottom of the base slab, and a drainage ditch is installed.

[0052] The reserved portion of the bottom and top reinforcement bars of the slab connecting the two sides of the diaphragm wall.

[0053] The steel struts and triaxial cement mixing piles are retained to ensure structural stability during construction.

[0054] Special concrete is poured to ensure waterproof performance.

[0055] High-performance waterproofing materials are applied to complete the entire waterproofing process.

[0056] Effective drainage through the drainage ditch reduces the accumulation of groundwater at the diaphragm wall joints, lowers the risk of leakage, and improves the overall waterproof performance of the diaphragm wall, thereby ensuring the quality of the project.

[0057] A well-designed drainage system prevents construction delays caused by groundwater issues. Drainage ditches quickly remove groundwater, creating a dry working environment for subsequent construction, thus facilitating a smoother construction process and accelerating project progress; they also reduce the cost of later maintenance and handling of leaks. Furthermore, improved construction efficiency indirectly lowers project costs.

[0058] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A waterproof drainage ditch structure at the connection of a diaphragm wall, characterized in that: It includes a drainage ditch body, which is set at the connection of adjacent diaphragm walls to guide the flow of groundwater and prevent the accumulation of groundwater at the connection.

2. The waterproof drainage blind ditch structure at the connection of a diaphragm wall according to claim 1, characterized in that: The main body of the drainage blind ditch includes a galvanized steel pipe and a PE pipe. The galvanized steel pipe serves as the outer skeleton of the drainage blind ditch, providing structural support. The PE pipe is located above the galvanized steel pipe and is combined with the galvanized steel pipe to form the main body of the drainage blind ditch. The cross-sectional shape of the main body of the drainage blind ditch is arc-shaped or trapezoidal.

3. The waterproof drainage blind ditch structure at the connection of the diaphragm wall according to claim 2, characterized in that: The PE pipe has small holes inside and is wrapped with fine gauze on the outside to form a flow channel.

4. The waterproof drainage blind ditch structure at the connection of a diaphragm wall according to claim 1, characterized in that: It also includes a filtration structure, which is integrated into the main body of the drainage ditch to filter impurities in the groundwater.

5. A waterproof drainage blind ditch structure at the connection of a diaphragm wall according to claim 4, characterized in that: The filtration structure includes multiple filtration layers, which are disposed inside the PE pipe or between the outer fine gauze and the PE pipe, for filtering impurities such as mud and sand in groundwater.

6. The waterproof drainage blind ditch structure at the connection of a diaphragm wall according to claim 1, characterized in that: The main body of the drainage ditch is located at the bottom of the base plate at the connection of the diaphragm wall, and special concrete is poured on top of the main body of the drainage ditch.

7. A waterproof drainage blind ditch structure at the connection of a diaphragm wall according to claim 1, characterized in that: The outer side of the main body of the drainage ditch is reinforced with triaxial cement mixing piles to enhance the stability of the diaphragm wall connection.

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