Simulation platform for water leakage treatment of tunnel structure under floating slab

Abstract

The invention relates to the field of tunnel construction, and discloses a floating slab lower tunnel structure leakage water treatment simulation platform which comprises a mounting foundation (1), a plurality of shield segments (2), a non-shield tunnel and base (3), a floating slab (4) and a shield base (5), and an arc-shaped shield tunnel mounting groove (13) is formed in the mounting foundation; an observation foundation pit (11), a non-shield tunnel mounting groove (14) and a drainage slope (12) are respectively formed on two sides of the shield tunnel mounting groove; the depth of the observation foundation pit is larger than that of the shield tunnel mounting groove; the plurality of shield segments (2) are adjacently arranged in the shield tunnel mounting groove, and shield segment longitudinal seams (21) and shield segment circular seams (22) are formed among the shield segments; the shield base is arranged on the shield segment; the non-shield tunnel and the base are arranged in the non-shield tunnel mounting groove, and the upper surface of the base is flush with the upper surface of the shield base.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and more specifically to a simulation platform for water leakage control in tunnel structures under floating slabs. Background Technology

[0002] Subway water leakage is one of the common problems in underground engineering. As the problem of water leakage develops, water leakage problems have also appeared in the construction joints and expansion joints of the invert arch under some floating slab sections.

[0003] Water leakage causes the steel spring floating plate to deviate from its normal operating environment. Vibration damping components such as vibration isolators are susceptible to corrosion, resulting in weakened or even lost vibration damping performance. This exacerbates the impact of environmental vibration, increases operation and maintenance costs, and in severe cases, even affects the safety of subway operation.

[0004] Leakage occurs when a section of the structure becomes interconnected with its interior, forming a seepage channel. This channel becomes a path for water pressure release, creating flowing water. The dynamic seepage field generated by this flowing water concentrates the surrounding soil and water pressure at the seepage channel, causing stress concentration. This stress further amplifies structural damage, leading to a gradual increase in the number of leakage points and the area affected by leakage, resulting in increasingly severe leakage problems. Therefore, timely remediation of leaks is essential.

[0005] In traditional engineering leakage control practices, engineers have summarized typical construction techniques such as injecting chemical grouting materials, embedding rigid quick-setting materials, applying waterproof mortar, and coating waterproof paint. However, due to the complex vibration reduction structure of floating slab track beds, the enclosed, dark, and narrow space of the tunnel structure beneath the slab makes leakage detection and location difficult. At the same time, the large coverage area of ​​the floating slab significantly restricts the grouting hole layout for leakage control. Furthermore, conventional grouting schemes for leakage control cannot guarantee that the grout will not flow into the gap between the floating slab and the foundation, thus affecting the vibration reduction function of the floating slab.

[0006] Therefore, it is necessary to establish a simulation platform to verify and optimize new technical methods in order to at least partially address the shortcomings of existing technologies. Summary of the Invention

[0007] This invention addresses the aforementioned shortcomings in the existing technology by providing a simulation platform for water leakage control in tunnel structures under floating slabs. This platform verifies the effectiveness of leakage detection and location techniques, drilling schemes, grouting equipment and processes, and grouting materials in an experimental environment, thereby achieving experimental verification of water leakage control technology for tunnel structures under floating slabs.

[0008] More specifically, the present invention provides a simulation platform for water leakage control in a tunnel structure under a floating slab, comprising an installation foundation (1), multiple shield tunnel segments (2), a non-shield tunnel and base (3), a floating slab (4), and a shield base (5).

[0009] Among them, an arc-shaped shield tunnel installation groove (13) is formed in the installation foundation (1), and an observation pit (11) and a non-shield tunnel installation groove (14) are formed on both sides of the shield tunnel installation groove (13). A drainage slope (12) is also formed near the non-shield tunnel installation groove (14).

[0010] Among them, the depth of the observation pit (11) is greater than the depth of the shield tunnel installation groove (13);

[0011] Multiple shield tunnel segments (2) are arranged adjacently in the shield tunnel installation slot (13), and a longitudinal joint (21) and a circumferential joint (22) are formed between the multiple shield tunnel segments (2); the shield base (5) is set on the shield tunnel segments (2);

[0012] The non-shield tunnel and its base (3) are set in the non-shield tunnel installation groove (14), and the upper surface of its base is flush with the upper surface of the shield base (5).

[0013] According to an embodiment of the present invention, a shield base ditch (51) is formed on the upper surface of the shield base (5), and a non-shield base ditch (32) is formed on the upper surface of the non-shield tunnel and base (3). The shield base (5) and the non-shield tunnel and base (3) are cast integrally.

[0014] According to an embodiment of the present invention, the bottom height of the non-shield base drainage ditch (32) is not lower than the top height of the drainage slope (12).

[0015] According to an embodiment of the present invention, the foundation pit (11) and the non-shield tunnel installation groove (14) are observed to be rectangular in shape.

[0016] According to an embodiment of the present invention, the floating slab tunnel structure leakage control simulation platform further includes a floating slab (4) set on the shield base (5) and the non-shield tunnel and base (3).

[0017] According to an embodiment of the present invention, a plurality of auxiliary leakage detection holes (31) are formed in the non-shield tunnel and the base (3), which extend from the upper surface of the non-shield tunnel and the base (3) to the side of the tunnel.

[0018] According to an embodiment of the present invention, one end of the non-shield tunnel and the foundation (3) is a side retaining wall (33).

[0019] According to an embodiment of the present invention, the floating slab tunnel structure leakage control simulation platform further includes vibration sensors (6) installed on the shield base (5), the non-shield tunnel and base (3) and the shield segment (2).

[0020] The floating slab tunnel structure leakage control simulation platform of the present invention can quickly replace the elastic elements of the floating slab and is designed for different tunnel structure types. It can analyze the leakage detection and control technologies of different structures under different types of floating slabs, thereby verifying the effectiveness of leakage investigation and location technology, drilling scheme, grouting equipment and process, grouting materials, etc. in an experimental environment, and further analyzing the impact of leakage control technology on the vibration reduction performance of the floating slab. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the installation foundation for a simulation platform for water leakage control under a floating slab tunnel structure according to an embodiment of the present invention.

[0022] Figure 2 A three-dimensional structural diagram of the simulation platform for water leakage control of a floating slab tunnel structure according to an embodiment of the present invention after installing shield tunnel segments, non-shield base and shield base;

[0023] Figure 3 This is a three-dimensional structural diagram of the installation of shield tunnel segments, non-shield base, shield base and the three-dimensional structure behind the floating slab of the simulation platform for water leakage control of the tunnel structure under the floating slab according to an embodiment of the present invention.

[0024] Figure 4 A non-shield tunnel cross-section diagram of a simulation platform for water leakage control under a floating slab tunnel structure according to an embodiment of the present invention; and

[0025] Figure 5 This is a cross-sectional view of a shield tunnel for a simulation platform for water leakage control under a floating slab tunnel structure according to an embodiment of the present invention. Detailed Implementation

[0026] The present invention can be better understood from the accompanying drawings and the following embodiments. However, those skilled in the art will readily understand that the descriptions of the embodiments are for illustrative purposes only and should not be construed as limiting the invention.

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the floating slab tunnel structure leakage control simulation platform according to an embodiment of the present invention, including the installation of shield tunnel segments, non-shield base, shield base, and floating slab. As shown in the figure, the floating slab tunnel structure leakage control simulation platform according to an embodiment of the present invention may include an installation foundation (1), multiple shield tunnel segments (2), a non-shield tunnel and base (3), a floating slab (4), a shield base (5), and sensors (6). The various components will be further described in detail below with reference to the accompanying drawings.

[0028] Figure 1This is a three-dimensional structural diagram of the installation foundation of the simulation platform for water leakage control under the floating slab tunnel structure according to an embodiment of the present invention. Referring to the figure, the installation foundation (1) can be formed into a cuboid shape, in which a shield tunnel installation groove (13) is formed. The inner surface of the shield tunnel installation groove is an arc surface, and the length and width of the arc surface can be determined according to the actual situation, which is suitable for installing shield segments (2).

[0029] An observation pit (11) is formed on one side of the shield tunnel installation trench (13). As shown in the figure, the observation pit (11) can be formed into a cuboid shape, with a length greater than the length of the shield tunnel installation trench (13) and a depth greater than the depth of the shield tunnel installation trench (13), which facilitates subsequent observation of the structure's water leakage. A non-shield tunnel installation trench (14) is formed on the other side of the shield tunnel installation trench (13). As shown in the figure, the non-shield tunnel installation trench (14) can be formed into a cuboid shape, and a portion of the sidewall of the shield tunnel installation trench (13) can be exposed in the non-shield tunnel installation trench (14). In this way, a gradient structure is formed between the observation pit (11) and the shield tunnel installation trench (13) and the non-shield tunnel installation trench (14), which facilitates structural water permeability observation experiments. In addition, a drainage slope (12) is formed near the non-shield tunnel installation trench (14); the upper end of the drainage slope (12) is connected to the drainage ditch of the non-shield tunnel foundation, and the drainage slope gradually slopes downward as it moves away from the non-shield tunnel foundation installation trench.

[0030] Figure 2 This is a three-dimensional structural diagram of the simulation platform for water leakage control under a floating slab tunnel structure according to an embodiment of the present invention, after the installation of shield tunnel segments, shield tunnel segments and non-shield foundation.

[0031] Referring to the attached figures, multiple shield tunnel segments (2) are arranged adjacently in the shield tunnel mounting slot (13). Four shield tunnel segments (2) are shown in the figure, thereby forming a longitudinal joint (21) and an annular joint (22) between the multiple shield tunnel segments (2). As shown in the figure (refer to the attached figures) Figure 4 The non-shield tunnel and its base (3) are formed into a shape that matches the non-shield tunnel mounting groove (14), such as a cuboid shape. This allows the non-shield tunnel and its base (3) to be secured within the non-shield tunnel mounting groove (14) using the exposed sidewalls of the shield tunnel mounting groove (13). After installation, the upper surface of the non-shield tunnel and its base (3) is substantially flush with the upper surface of the mounting foundation (1). A non-shield base drainage ditch (32) is formed in the center of the non-shield tunnel and its base (3). The bottom of the non-shield base drainage ditch (32) is not lower than the top of the drainage slope (12) to facilitate drainage. Additionally, multiple seepage holes (31) can be pre-set in the non-shield base drainage ditch, with these pre-set seepage holes extending from the outer surface of the tunnel on the upper surface of the base.

[0032] In a preferred embodiment, such as Figure 2 and 4 As shown, one end of the non-shield tunnel and the foundation (3) can also be a side retaining wall (33).

[0033] Referring to the attached diagram, after the shield tunnel segments and the non-shield base are installed, the shield base (5) can be installed on the shield tunnel segments. The lower surface of the shield base (5) is formed into an arc surface that matches the upper surface of the shield tunnel segment (2), and the upper surface of the shield base (5) is a horizontal surface with a shield base drainage ditch (51) in the middle. The shield base drainage ditch (51) and the non-shield base drainage ditch (32) are aligned, and the upper surface of the shield base (5) is flush with the upper surface of the non-shield tunnel and the base (3); for example, this can be achieved by integrally casting the shield base (5) and the non-shield tunnel and the base (3).

[0034] Figure 3 This is a schematic diagram of the installation of shield tunnel segments, non-shield base, shield base and three-dimensional structure behind the floating slab of the simulation platform for water leakage control under the floating slab tunnel structure according to the embodiment of the present invention; the outer sleeve of the vibration isolator on the floating slab is arranged with fasteners at equal intervals, which can simulate the standard section or transition section of the floating slab. Figure 4 This is a non-shield tunnel cross-section diagram of a simulation platform for water leakage control under a floating slab tunnel structure according to an embodiment of the present invention. Figure 5 This is a cross-sectional view of a shield tunnel for a simulation platform for water leakage control under a floating slab tunnel structure according to an embodiment of the present invention.

[0035] Referring to the attached diagram, after the shield base (5) is installed, floating slabs (4) can be installed on the shield base (5) and the non-shield tunnel and base (3). The type of floating slab can be set and changed as needed. For example, elastic elements can be arranged according to the type of floating slab, vibration isolators can be arranged according to the standard section or transition section design, or vibration damping pads can be laid instead.

[0036] In addition, sensors (6) (e.g., vibration sensors) can be installed on the shield base (5), non-shield tunnel and base (3), and shield segments (2). For example, vibration sensors can be installed by pre-setting sensor supports.

[0037] After all components are installed, the floating slab tunnel structure leakage control simulation platform of the present invention can be used for various functions. For example, the platform can be used to verify the grouting and drilling scheme, including the feasibility of drilling equipment and hole layout scheme; simulate different types of tunnel leakage conditions; verify the feasibility of grouting equipment and process, including grouting pressure, flow rate, equipment, etc.; verify the effectiveness of anti-grouting measures, such as high-pressure airbags, high-pressure water flushing and cleaning, etc.; evaluate the mechanical properties of the floating slab after drilling, including static load cracking test, fatigue test, etc. after the floating slab is drilled; and evaluate the vibration reduction performance of the steel spring floating slab after implementation, etc.

[0038] The following describes the general operation of conducting experiments using the platform of this invention:

[0039] Experimental steps:

[0040] 1. Based on the type of floating slab, arrange the elastic elements, that is, arrange the vibration isolators or lay the vibration damping pads according to the standard section or transition section design.

[0041] 2. Conduct vibration tests and use sensors to collect vibration data to evaluate the initial values ​​of the vibration response of the base and the sidewalls of the components;

[0042] 3. Utilize the pre-reserved leakage holes to select some leakage holes for water injection;

[0043] 4. Conduct leak detection to verify the accuracy of leak detection technology;

[0044] 5. Drilling holes in the floating slab – Test and verify the hole diameter, angle, depth, and arrangement, etc.

[0045] 6. Install anti-grout leakage measures around the grouting point under the slab – high-pressure airbags;

[0046] 7. Grouting – Test grouting pressure, flow rate, and equipment feasibility;

[0047] 8. Remove the high-pressure airbag and flush with high-pressure water.

[0048] 9. Conduct vibration tests, use sensors to evaluate the vibration response after the tests, and evaluate the impact of grouting on the vibration reduction effect;

[0049] 10. Based on the overall evaluation of the feasibility of the technical measures, propose directions for optimization.

[0050] More specifically, this invention can be used to evaluate the vibration reduction performance of floating slabs before and after treatment, and its processing flow is as follows:

[0051] 1. Collect vibration acceleration data of the foundation (e.g., shield tunnel foundation, non-shield tunnel and foundation, etc.) and the sidewalls of the components before drilling;

[0052] 2. Calculate the VL of the measuring points on the base and sidewall of the component before drilling. Zmax (1~80Hz);

[0053] 3. Collect vibration acceleration data of the foundation and sidewalls of the components after treatment;

[0054] 4. Calculate the VL of the measuring points on the base and sidewalls of the components after treatment. Zmax (1~80Hz);

[0055] 5. Determine the changes in the vibration damping performance of the floating slab.

[0056] The embodiments of the present invention have been described above by way of example, but the present invention is not limited to the embodiments described above. The basic idea of ​​the present invention lies in the above basic scheme. For those skilled in the art, designing various modified models, formulas, and parameters based on the teachings of the present invention does not require creative effort. Changes, modifications, substitutions, and variations made to the embodiments without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A simulation platform for leakage water treatment of a tunnel structure under a floating slab, characterized in that, The installation foundation (1), a plurality of shield segments (2), a non-shield tunnel and base (3), a floating slab (4), and a shield base (5) are included. The installation foundation (1) is formed with a circular-arc-shaped shield tunnel installation slot (13), and an observation foundation pit (11) and a non-shield tunnel installation slot (14) are formed on both sides of the shield tunnel installation slot (13), and a drainage slope (12) is further formed adjacent to the non-shield tunnel installation slot (14). The depth of the observation foundation pit (11) is greater than the depth of the shield tunnel installation slot (13), the plurality of shield segments (2) are arranged adjacent to each other in the shield tunnel installation slot (13), and shield segment longitudinal joints (21) and shield segment ring joints (22) are formed between the plurality of shield segments (2), and the shield base (5) is arranged on the shield segments (2). The non-shield tunnel and base (3) is arranged in the non-shield tunnel installation slot (14), and the upper surface of the base is flush with the upper surface of the shield base (5).

2. The platform according to claim 1, wherein, The upper surface of the shield base (5) is formed with a shield base water channel (51), the upper surface of the non-shield tunnel and base (3) is formed with a non-shield base water channel (32), and the shield base (5) and the non-shield tunnel and base (3) are integrally poured.

3. The platform according to claim 2, wherein, The bottom surface height of the non-shield base water channel (32) is not lower than the top height of the drainage slope (12).

4. The platform according to claim 1, wherein, The observation foundation pit (11) and the non-shield tunnel installation slot (14) are cuboids.

5. The platform according to claim 1, wherein, A vibration isolator or other vibration isolation element is arranged on the floating slab (4).

6. The platform according to claim 1, wherein, A leakage water hole (31) is reserved in the non-shield tunnel and base (3), which extends from the upper surface of the non-shield tunnel and base (3) to the outer surface of the tunnel.

7. The platform according to claim 5, wherein, One end of the non-shield tunnel and base (3) is formed with a side retaining wall (33). 8.The platform of claim 1, wherein, A vibration sensor (6) is arranged on the shield base (5), the non-shield tunnel and base (3), and the shield segment (2).

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