Suction bucket foundation based on bionic interface response regulation and pullout enhancement method thereof

Abstract

The present application relates to the technical field of marine geotechnical engineering and marine foundation engineering, and particularly relates to a suction bucket foundation based on bionic interface response regulation and a method for enhancing the uplift resistance of the suction bucket foundation, which comprises a suction bucket body, a bionic interface response structure unit arranged on the inner wall of the suction bucket body and used for regulating the interface contact state between the suction bucket body and the soil during the uplift and cyclic uplift processes, a negative pressure sensing and regulating device arranged at the top of the suction bucket body and used for sensing the negative pressure in the suction bucket body and regulating the suction bucket body during the uplift process, and a telescopic interface response structure arranged at the bottom of the suction bucket body and used for adjusting the geometric shape of the interface between the suction bucket body and the soil, wherein the telescopic interface response structure is connected with an adjusting device. The present application can effectively inhibit the rapid decay of the negative pressure in the bucket under the cyclic working condition and delay the interface friction degradation rate, and can also significantly improve the stability under the long-term cyclic uplift load.

Description

Technical Field

[0001] This invention relates to the fields of marine geotechnical engineering and marine foundation engineering, and in particular to a suction bucket foundation based on biomimetic interface response regulation and its pull-out resistance enhancement method. Background Technology

[0002] Existing suction bucket foundations are widely used in offshore wind power and floating structure anchoring projects. Their pull-out bearing capacity mainly relies on the negative pressure inside the bucket and the interfacial friction between the bucket wall and the soil. Current technologies have explored ways to improve the pull-out performance of suction buckets by altering the bucket wall roughness and incorporating biomimetic textures or structures to enhance interfacial friction or adhesion. However, these solutions are primarily passive structural reinforcement methods and still suffer from the following problems: 1. The negative pressure inside the bucket is prone to rapid dissipation during pull-out and cyclic pull-out processes, making long-term stability difficult; 2. Under cyclic loading, the bucket wall-soil interface easily forms continuous shear bands, leading to rapid degradation of friction; 3. Existing biomimetic structures focus primarily on the geometric shape itself, lacking the ability to actively control the evolution of negative pressure and the interfacial contact state.

[0003] Therefore, there is an urgent need for a suction bucket foundation based on biomimetic interface response regulation and its pull-out resistance enhancement method, which can coordinate the regulation of negative pressure and interface response during pull-out and cyclic pull-out processes. Summary of the Invention

[0004] The purpose of this invention is to provide a suction bucket foundation based on biomimetic interface response regulation and its pull-out resistance enhancement method, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: a suction bucket foundation based on biomimetic interface response regulation, comprising a suction bucket body, wherein the inner wall of the suction bucket body is provided with a biomimetic interface response structure unit for regulating the contact state between the suction bucket body and the soil interface during pull-out and cyclic pull-out processes; the top of the suction bucket body is provided with a negative pressure sensing and regulation device for sensing the negative pressure within the suction bucket body and responding and regulating the suction bucket body during the pull-out process; the bottom of the suction bucket body is provided with a stretchable interface response structure for adjusting the geometry of the interface between the suction bucket body and the soil, and the stretchable interface response structure is connected to an adjustment device.

[0006] Preferably, the suction barrel body includes a barrel side wall, and a top cover is fixedly connected to the top of the barrel side wall.

[0007] Preferably, the bionic interface response structure unit includes multiple bionic interface response structure parts, and multiple equally spaced bionic secondary contact adjustment controls are provided between two adjacent bionic interface response structure parts.

[0008] Preferably, the bionic interface response structure includes a plurality of equally spaced bionic primary response components, and the bionic primary response components and the bionic secondary contact adjustment control are installed on the inner wall of the side wall of the barrel.

[0009] Preferably, the negative pressure sensing and control device includes multiple negative pressure sensing units disposed in the side wall of the barrel, the negative pressure sensing units are installed on the top cover, and the multiple negative pressure sensing units are respectively connected to a suction port through a negative pressure adjustment unit. The top cover and the suction port are connected through a flexible negative pressure transmission unit.

[0010] Preferably, the negative pressure regulating unit extends through the top cover and the flexible negative pressure transmission unit.

[0011] Preferably, the retractable interface response structure includes a plurality of telescopic channels formed on the side wall of the barrel away from the top cover, telescopic columns are slidably connected in the telescopic channels, and the telescopic channels are connected to a grouting channel through a grout outlet hole. The grouting channel is formed inside the side wall of the barrel.

[0012] Preferably, the side wall of the barrel facing the top cover has a grouting interface that communicates with the adjusting device, and the grouting interface is connected to the end of the grouting channel away from the grout outlet.

[0013] Preferably, the regulating device includes a drive unit and a grouting pump, and the grouting interface is connected to the outlet end of the grouting pump.

[0014] A method for enhancing the pull-out resistance of a suction bucket foundation based on biomimetic interface response modulation includes the following steps: S1. Negative pressure sensing; S2. Negative pressure buffering and regulation; S3. Interface response refactoring; S4. Interface layout partition adjustment; S5. Grouting and filling of gaps, followed by curing; S6. Solidify and lock.

[0015] The present invention discloses the following technical effects: This invention, through the synergistic effect of a biomimetic interface response structural unit, a negative pressure sensing and control device, and a stretchable interface response structure, can transform the suction bucket's pull-out process from passive load-bearing to active control of negative pressure-interface response; it can also effectively suppress the rapid decay of negative pressure inside the bucket under cyclic conditions and slow down the rate of interface friction degradation; at the same time, it can significantly improve the stability under long-term cyclic pull-out loads. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the suction barrel body of the present invention; Figure 3 This is a cross-sectional view of the top cover and flexible negative pressure transmission unit of the present invention; Figure 4 This is a bottom view of the side wall structure of the barrel of the present invention; Figure 5 This is a partial cross-sectional view of the retractable part installed on the side wall of the barrel body of the present invention. Figure 6 This is a schematic diagram of the structure of the telescopic column of the present invention when it is extended; Figure 7 This is a cross-sectional view of the biomimetic first-order response structure of the present invention; Figure 8 This is a cross-sectional schematic diagram of the biomimetic two-stage contact control structure of the present invention; Figure 9 This is a cross-sectional view of the negative pressure sensing unit of the present invention; Figure 10 This is a schematic diagram of the cooperative working mechanism of the present invention under pull-out resistance and cyclic working conditions; The components include: 1. Suction tank body; 2. Top cover; 3. Suction interface; 4. Tank side wall; 51. Bionic first-level response component; 52. Bionic second-level contact adjustment control; 61. Negative pressure sensing unit; 62. Flexible negative pressure transmission unit; 63. Negative pressure adjustment unit; 71. Telescopic channel; 72. Telescopic column; 81. Grouting channel; 82. Grouting interface; 83. Grout outlet; 84. Grouting section. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figures 1 to 10 This invention provides a suction bucket foundation based on biomimetic interface response regulation, including a suction bucket body 1. The inner wall of the suction bucket body 1 is provided with a biomimetic interface response structure unit for regulating the contact state between the suction bucket body 1 and the soil interface during pull-out and cyclic pull-out processes. The top of the suction bucket body 1 is provided with a negative pressure sensing and regulation device for sensing the negative pressure inside the suction bucket body 1 and responding and regulating the suction bucket body 1 during the pull-out process. The bottom of the suction bucket body 1 is provided with a stretchable interface response structure for adjusting the geometry of the interface between the suction bucket body 1 and the soil, and the stretchable interface response structure is connected to an adjustment device.

[0021] The biomimetic interface response structure unit is used to regulate the evolution of the contact state of the bucket wall-soil interface during pull-out and cyclic pull-out processes; the negative pressure sensing and control device is used to sense, buffer and regulate the negative pressure inside the bucket; through the synergistic effect of the biomimetic interface response structure unit and the negative pressure sensing and control device, the response control of the suction bucket pull-out process is realized.

[0022] Under the action of pull-out load, relative displacement occurs between the side wall 4 of the barrel and the soil. The biomimetic first-order response component 51 causes the interface contact state to exhibit zoning characteristics, transforming the overall interface slippage process into an asynchronous evolution process of multiple local response units, thereby delaying the occurrence of overall instability.

[0023] This invention, through the synergistic effect of a biomimetic interface response structural unit, a negative pressure sensing and control device, and a stretchable interface response structure, can transform the suction bucket's pull-out process from passive load-bearing to active control of negative pressure-interface response; it can also effectively suppress the rapid decay of negative pressure inside the bucket under cyclic conditions and slow down the rate of interface friction degradation; at the same time, it can significantly improve the stability under long-term cyclic pull-out loads.

[0024] Further optimization of the design: the suction tank body 1 includes a tank side wall 4, and a top cover 2 is fixedly connected to the top of the tank side wall 4. The suction tank body 1 has an overall cylindrical structure and is made of steel, making it suitable for engineering environments such as offshore wind power and floating structure anchoring.

[0025] The scheme is further optimized. The bionic interface response structure unit includes multiple bionic interface response structure parts, and multiple equally spaced bionic secondary contact adjustment controls 52 are set between two adjacent bionic interface response structure parts.

[0026] Further optimization of the scheme: the bionic interface response structure includes multiple equally spaced bionic primary response components 51, and the bionic primary response components 51 and the bionic secondary contact adjustment control 52 are installed on the inner wall of the barrel side wall 4.

[0027] The biomimetic first-level response element 51 is a recessed or suction cup type interface unit, which is distributed along the inner wall of the barrel sidewall 4 in the circumferential and axial directions; the distance between two adjacent biomimetic first-level response elements 51 is s1; the height of a single biomimetic first-level response element 51 protruding from the inner wall of the barrel sidewall 4 is h1.

[0028] During pull-out and cyclic pull-out processes, the biomimetic first-order response component 51 is used to form multiple local negative pressure-contact response areas between the barrel wall and the soil, decomposing the traditional overall interface slip process into a multi-region, asynchronous response process.

[0029] The bionic secondary contact control 52 is located in the area between four adjacent bionic primary response elements 51. The bionic secondary contact control 52 protrudes from the inner wall of the barrel side wall 4 by a height h2 and is distributed in a non-uniform manner. The distance between two adjacent bionic secondary contact control 52 is s2.

[0030] The biomimetic secondary contact control 52 is used to interfere with the continuous development of the interface shear band and delay the degradation of interface friction during cyclic loading.

[0031] In the process of pull-out resistance and cyclic pull-out resistance, the biomimetic secondary contact control 52 is used to interfere with the continuous development of the shear zone at the barrel wall-soil interface, so that the interface shear failure exhibits the characteristics of multi-point initiation and multi-path expansion, thereby effectively delaying the rapid degradation of interface friction resistance with the increase of cycle number.

[0032] The biomimetic primary response component 51 and the biomimetic secondary contact adjustment component 52 work together to enhance the negative pressure stability and interfacial friction capability of the suction barrel under pull-out and cyclic conditions.

[0033] Further optimization of the scheme: the negative pressure sensing and control device includes multiple negative pressure sensing units 61 set in the side wall 4 of the barrel. The negative pressure sensing units 61 are installed on the top cover 2. The multiple negative pressure sensing units 61 are connected to the suction interface 3 through the negative pressure adjustment unit 63. The top cover 2 and the suction interface 3 are connected through the flexible negative pressure transmission unit 62.

[0034] The negative pressure sensing unit 61 can be a pressure sensing device, which indirectly senses the change in negative pressure inside the tank by working in conjunction with the flexible negative pressure transmission unit; that is, the negative pressure sensing unit 61 is used to sense the change in negative pressure or pore water pressure inside the tank.

[0035] The flexible negative pressure transmission unit 62 is a deformable membrane or fabric structure, which is used to buffer and transmit negative pressure during the process of negative pressure change, so as to avoid the sudden negative pressure from directly acting on the barrel wall interface.

[0036] The flexible negative pressure transmission unit 62 can be made of canvas, polymer fabric or elastic composite material. One end of it is fixed to the periphery of the top cover 2, and the other end faces the negative pressure space inside the bucket. During the process of negative pressure change, the flexible negative pressure transmission unit 62 plays a buffering role in the negative pressure change through its own deformation, so as to avoid the sudden negative pressure from directly acting on the bucket wall interface.

[0037] The design was further optimized so that the negative pressure adjustment unit 63 penetrates the top cover 2 and the flexible negative pressure transmission unit 62.

[0038] The negative pressure regulating unit 63 is connected to the suction port 3 and is used to compensate for the negative pressure in the tank by suction or release when the negative pressure sensing unit 61 senses the fluctuation of negative pressure in the tank.

[0039] The negative pressure regulating unit 63 may include pipelines, valves or flow control structures, and its structural form is not limited to the form shown in the figure.

[0040] Further optimization of the scheme: the scalable interface response structure includes multiple telescopic channels 71 opened on the side wall 4 of the barrel away from the top cover 2. Telescopic columns 72 are slidably connected in the telescopic channels 71. The telescopic channels 71 are connected to the grouting channels 81 through the grout outlet 83. The grouting channels 81 are opened inside the side wall of the barrel side wall 4.

[0041] In the initial state, the end of the telescopic column 72 away from the slurry outlet 83 is flush with the bottom of the bucket.

[0042] The function of the stretchable interface response structure is to control the extension length of each telescopic column 72 by driving force according to the soil conditions at different installation positions of the suction bucket, so that a non-uniformly distributed interface geometry is formed in the bottom edge area of ​​the bucket, and a stable partitioned embedding structure is formed after grouting and curing, thereby improving the overall pull-out resistance and inhibiting the continuous development of interface shear failure.

[0043] The driving force can be a circulating compression pump, which controls the extension length of each telescopic column 72.

[0044] To further optimize the design, a grouting interface 82 is provided on the side wall 4 of the barrel facing the top cover 2, which is connected to the adjustment equipment. The grouting interface 82 is connected to the end of the grouting channel 81 away from the grout outlet 83.

[0045] The scheme was further optimized, and the adjustment equipment included a drive unit and a grouting pump, with the grouting interface 82 connected to the outlet end of the grouting pump.

[0046] The drive unit is used to apply driving force to the telescopic column 72 to control the extension and retraction of the telescopic column 72 in the telescopic channel 71, thereby adjusting the interface geometry of the bottom edge area of ​​the barrel.

[0047] The grouting pump is connected to the grouting interface 82 and is used to inject grout into the grouting channel 81, so that the grout enters the expansion channel 71 through the grout outlet 83 and spreads around the expansion column 72 to form the grouting section 84.

[0048] During operation, the drive unit first controls the telescopic column 72 to extend to a preset length, so that the bottom edge area of ​​the barrel forms a non-uniformly distributed interface geometry. Then, grout is injected into the telescopic channel 71 through the grouting pump. The grout fills and solidifies around the telescopic column 72, so that the telescopic column 72 forms a stable embedded structure and maintains its extended state, thereby achieving the solidification and locking of the interface structure.

[0049] Through the synergistic effect of the above-mentioned "expansion and contraction adjustment, grouting and filling, and solidification and locking", the bottom edge area of ​​the bucket is transformed from a single friction interface to a composite interface structure with a embedding effect, thereby effectively improving the interface stability of the suction bucket under pull-out and cyclic pull-out conditions and inhibiting the continuous development of interface shear failure.

[0050] A grouting unit is formed by grouting channel 81, grouting interface 82, grout outlet 83 and grouting pump.

[0051] Meanwhile, the grouting unit and the negative pressure sensing and control device are arranged independently to prevent the grouting medium from entering the negative pressure control channel.

[0052] The grouting pump is used to inject grout into the expansion channel 71, forming a layered grouting section 84 inside the expansion channel 71, which can effectively improve the embedding effect of the expansion column 72 and make the expansion column 72 form a permanent embedded body.

[0053] Suction bucket installation and construction process: 1. Place the suction bucket body 1 at the predetermined seabed location; 2. The suction bucket body initially penetrates the soil by its own weight; 3. The water inside the bucket is extracted through the suction port 3, creating negative pressure inside the bucket; 4. Under the action of negative pressure, the suction bucket further penetrates the seabed soil; 5. The biomimetic interface response structural unit gradually forms a close contact with the surrounding soil.

[0054] Working process under pull-out and cyclic pull-out conditions: (a) Pull-out working conditions Under the action of pull-out load: the negative pressure sensing unit 61 senses the change of negative pressure inside the barrel; the flexible negative pressure transmission unit 62 buffers the negative pressure fluctuation; the negative pressure adjustment unit 63 compensates and adjusts the negative pressure inside the barrel; the bionic primary response component 51 forms multiple local negative pressure-contact response areas; the bionic secondary contact adjustment control 52 regulates the spatial evolution of the interface shearing area.

[0055] Through the aforementioned synergistic effect, the suction bucket pull-out process is transformed from overall slip control to multi-region response control.

[0056] (ii) Cyclic pull-out conditions Under long-term cyclic pull-out loads: the negative pressure sensing and control device suppresses the periodic and drastic fluctuations of negative pressure inside the barrel; the biomimetic interface response structural unit delays the degradation of friction at the barrel wall-soil interface; and the interface contact state is continuously reconstructed during the cycle.

[0057] This significantly improves the long-term stability of the suction bucket under low-cycle-high-cycle combined cyclic pull-out loads; at the same time, the stretchable interface response structure at the bottom of the bucket participates in the reconstruction and enhancement of the interface contact state, further enhancing the interface stability.

[0058] This invention achieves negative pressure-interface response regulation during the suction barrel's pull-out process; effectively suppresses rapid dissipation of negative pressure; delays interfacial friction degradation; and improves the stability of the suction barrel under cyclic pull-out conditions.

[0059] A method for enhancing the pull-out resistance of a suction bucket foundation based on biomimetic interface response modulation includes the following steps: S1. Negative pressure sensing: The negative pressure status inside the tank is obtained in real time through the negative pressure sensing unit 61.

[0060] S2. Negative pressure buffering and regulation: The negative pressure fluctuation is buffered by the flexible negative pressure transmission unit 62, and the negative pressure inside the tank is compensated and regulated by the flexible negative pressure transmission unit 62.

[0061] S3. Interface response reconstruction: Under the action of the biomimetic interface response structural unit, the contact state of the barrel wall-soil interface is continuously reconstructed during pull-out and cyclic pull-out processes.

[0062] S4. Interface morphology zoning adjustment: The extension length of the telescopic column 72 is determined according to the soil properties of the bottom edge area of ​​the suction bucket body 1. Then, the extension length of the telescopic column 72 of the telescopic interface response structure is controlled by the driving force. The extension length is determined before grouting and implemented at one time, thereby further enhancing the embedment between the bucket body and the surrounding soil and destroying the formation of continuous shear bands.

[0063] S5. Grouting and Filling Solidification: After the extension column 72 of the extensible interface response structure extends under the driving force control and forms a gap in the expansion channel 71, grout or solidifiable material is injected through the grouting pump, so that the grout or solidifiable material diffuses in the expansion channel 71 to form the grouting section 84 and solidifies to form a solidified body, thereby improving the embedding effect and pull-out bearing capacity of the bottom edge area of ​​the barrel.

[0064] S6. Curing and locking: After the grouting material reaches the preset curing strength, it can keep the telescopic column 72 in the extended state to achieve interface locking, so as to further suppress interface slippage and reduce the rate of cyclic degradation.

[0065] This invention utilizes the synergistic effect of expansion and grouting to transform the interface of the bottom edge region of the suction tank from a single frictional interface to a "deformable interface → fillable interface → solidifiable embedded interface," thereby significantly improving the interface stability of the suction tank under pull-out and cyclic pull-out conditions and effectively inhibiting the degradation of interface friction.

[0066] Meanwhile, the grouting and curing process is carried out under the synergistic effect of the negative pressure control device and the biomimetic interface response structure unit, so that the stability of negative pressure, the stability of interface contact state and the stability of interface morphology can form a synergistic enhancement effect.

[0067] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 invention.

[0068] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A suction bucket foundation based on biomimetic interface response regulation, characterized in that: The device includes a suction barrel body (1), on the inner wall of which is provided a biomimetic interface response structure unit for regulating the contact state between the suction barrel body (1) and the soil interface during pull-out and cyclic pull-out processes. The top of the suction barrel body (1) is provided with a negative pressure sensing and control device for sensing the negative pressure inside the suction barrel body (1) and responding and regulating the suction barrel body (1) during the pull-out process. The bottom of the suction barrel body (1) is provided with a stretchable interface response structure for adjusting the geometry of the interface between the suction barrel body (1) and the soil. The stretchable interface response structure is connected to an adjustment device.

2. The suction bucket foundation based on biomimetic interface response regulation according to claim 1, characterized in that: The suction barrel body (1) includes a barrel side wall (4), and a top cover (2) is fixedly connected to the top of the barrel side wall (4).

3. The suction bucket foundation based on biomimetic interface response regulation according to claim 2, characterized in that: The biomimetic interface response structure unit includes multiple biomimetic interface response structure parts, and multiple equally spaced biomimetic secondary contact adjustment controls (52) are provided between two adjacent biomimetic interface response structure parts.

4. The suction bucket foundation based on biomimetic interface response regulation according to claim 3, characterized in that: The bionic interface response structure includes a plurality of equally spaced bionic primary response components (51), and the bionic primary response components (51) and the bionic secondary contact adjustment control (52) are installed on the inner wall of the barrel side wall (4).

5. The suction bucket foundation based on biomimetic interface response regulation according to claim 2, characterized in that: The negative pressure sensing and control device includes multiple negative pressure sensing units (61) disposed in the side wall (4) of the barrel body. The negative pressure sensing units (61) are installed on the top cover (2). The multiple negative pressure sensing units (61) are connected to the suction port (3) through the negative pressure adjustment unit (63). The top cover (2) and the suction port (3) are connected through a flexible negative pressure transmission unit (62).

6. The suction bucket foundation based on biomimetic interface response regulation according to claim 5, characterized in that: The negative pressure regulating unit (63) extends through the top cover (2) and the flexible negative pressure transmission unit (62).

7. The suction bucket foundation based on biomimetic interface response regulation according to claim 2, characterized in that: The retractable interface response structure includes multiple telescopic channels (71) opened on the side wall (4) of the barrel away from the top cover (2). A telescopic column (72) is slidably connected in the telescopic channel (71). The telescopic channel (71) is connected to a grouting channel (81) through a grout outlet (83). The grouting channel (81) is opened inside the side wall of the side wall (4) of the barrel.

8. The suction bucket foundation based on biomimetic interface response regulation according to claim 7, characterized in that: The side wall (4) of the barrel body is provided with a grouting interface (82) that is connected to the adjustment device at one end facing the top cover (2). The grouting interface (82) is connected to the end of the grouting channel (81) away from the grout outlet (83).

9. The suction bucket foundation based on biomimetic interface response regulation according to claim 8, characterized in that: The regulating device includes a drive unit and a grouting pump, and the grouting interface (82) is connected to the outlet end of the grouting pump.

10. A method for enhancing the pull-out resistance of a suction bucket foundation based on biomimetic interface response regulation, based on the suction bucket foundation based on biomimetic interface response regulation as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. Negative pressure sensing; S2. Negative pressure buffering and regulation; S3. Interface response refactoring; S4. Interface layout partition adjustment; S5. Grouting and filling of gaps, followed by curing; S6. Solidify and lock.

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