Vertical shaft beam plate bottom sealing device and construction method thereof

Abstract

The invention belongs to the technical field of open caisson control, and discloses a vertical shaft beam plate bottom sealing device and a construction method thereof.The vertical shaft beam plate bottom sealing device comprises a ring beam, a sliding rail, a beam plate and at least two limiting assemblies, the ring beam is arranged at the upper end of a shaft blade foot and matched with the sliding rail to serve as a running track of a heading machine, sufficient operation space is provided for the heading machine, and the heading efficiency is improved. In the bottom sealing stage, the sliding rails and the ring beams form a supporting frame, and local deformation of the beam plates is prevented; the limiting assembly can effectively ensure that the beam plate is fixed relative to the sliding rail, and the beam plate is prevented from shifting or loosening due to external force in the bottom sealing process; the grouting holes and the grout overflow holes are formed in the beam plate, redundant mud at the well bottom can be effectively discharged in the grouting process, and the uniformity of the bottom sealing concrete layer is ensured. According to the vertical shaft beam plate bottom sealing device and the construction method thereof, the thickness of the bottom sealing concrete layer is reduced, meanwhile, the excavation space of the tunneling machine is guaranteed, the tunneling efficiency is improved, the thickness uniformity of the bottom sealing concrete layer can be guaranteed, and the overall bottom sealing structural strength is improved.

Description

Technical Field

[0001] This invention relates to the field of caisson control technology, and in particular to a vertical shaft beam-slab bottom sealing device and its construction method. Background Technology

[0002] The new caisson construction technology has achieved significant progress in terms of intelligence, digitalization, and mechanization, effectively solving problems such as tilting, sudden sinking, sand spillage, large construction disturbance, and slow construction speed in traditional caisson construction. By precisely controlling the sinking process, adopting a slurry balance system and prefabricated structure, and utilizing digital monitoring and automated equipment, it has not only significantly improved the stability, construction accuracy, and construction efficiency of the caisson, but also greatly reduced the disturbance to the surrounding environment, making the caisson construction technology applicable to a wider range of geological conditions.

[0003] Although the aforementioned new caisson technology has effectively solved many problems of traditional caissons, it still has shortcomings in practical applications. First, for large-diameter, deep-hole vertical shafts, in order to reduce the thickness of the underwater bottom sealing concrete layer, a bottom sealing beam is usually required. The bottom sealing beam is often fixed inside the vertical shaft first and gradually sinks together with the shaft to ensure the integrity and stability of the shaft wall. However, during the synchronous sinking of the bottom sealing beam and the cutting edge, the excavation space of the shaft boring machine is restricted, resulting in a decrease in tunneling efficiency and affecting construction efficiency. Second, the pouring thickness and uniformity of the bottom sealing concrete layer are difficult to control, and local weak points are easily formed during construction, which can potentially affect the overall stability of the structure. Summary of the Invention

[0004] The purpose of this invention is to provide a shaft beam-slab bottom sealing device and its construction method, which can reduce the thickness of the bottom sealing concrete layer without affecting the excavation space of the tunneling machine, improve tunneling efficiency, ensure the uniformity of the bottom sealing concrete layer thickness, and improve the overall bottom sealing structure strength.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A shaft beam-plate bottom sealing device is used to seal the bottom of a shaft, the shaft including a shaft body and a cutting edge, the cutting edge being disposed at the bottom of the shaft body. The shaft beam-plate bottom sealing device includes:

[0007] A ring beam is circumferentially arranged around the upper end of the cutting edge of the shaft. A slide rail is provided along the inner ring of the ring beam, and a tunneling machine is detachably mounted on the slide rail. The tunneling machine can move and excavate circumferentially along the slide rail.

[0008] The beam plate has grouting holes and overflow holes. The grouting holes are used to inject concrete into the bottom of the well shaft, and the overflow holes are used to discharge excess mud. The outer edge of the beam plate abuts against the inner edge of the slide rail.

[0009] At least two limiting components are provided at intervals along the circumference of the wellbore on the beam plate and the slide rail, and each limiting component is capable of fixing the beam plate relative to the slide rail along the circumference and radial direction of the wellbore.

[0010] Furthermore, at least two of the limiting components are distributed sequentially and evenly at intervals along the circumference of the beam and the slide rail.

[0011] Furthermore, the limiting component includes a limiting protrusion and a limiting groove. The limiting protrusion can be selectively disposed on either the inner edge of the slide rail or the outer edge of the beam plate, and the limiting groove is provided on the other of the inner edge of the slide rail or the outer edge of the beam plate. The limiting protrusion and the limiting groove are engaged in a locking fit.

[0012] Furthermore, the limiting slide groove includes a first slide groove and a second slide groove. The first slide groove is formed circumferentially at the middle of the inner edge of the slide rail or the middle of the outer edge of the beam plate. The first end of the second slide groove communicates with the first slide groove, and the second end of the second slide groove passes through the upper edge of the slide rail or the upper edge of the beam plate. The width of both the first slide groove and the second slide groove is not less than the width of the limiting protrusion. The limiting protrusion can slide through the second slide groove and be positioned in the first slide groove.

[0013] Furthermore, the second slide is inclined from its second end toward its first end, and the angle between the second slide and the first slide ranges from 90 degrees to 150 degrees.

[0014] Furthermore, a column is provided inside the first chute along the radial direction of the wellbore, and the distance between the first end of the second chute and the column is not less than the width of the limiting protrusion.

[0015] Furthermore, a groove is formed on the top edge of the first slide groove, the groove is located between the column and the first end of the second slide groove, and the limiting protrusion engages with the groove.

[0016] Furthermore, the beam slab is provided with a plurality of grouting holes and a plurality of overflow holes, and the plurality of grouting holes and the plurality of overflow holes are distributed sequentially at intervals around the central axis of the beam slab.

[0017] A construction method for sealing the bottom of a vertical shaft beam, wherein the vertical shaft beam bottom sealing device described in any of the above-mentioned methods is used, includes the following steps:

[0018] S1: A ring beam with the slide rail is pre-embedded and installed along the circumference of the wellbore at the upper end of the cutting edge at the bottom of the wellbore. The wellbore is then vertically extended into the stratum. The tunneling machine is installed on the slide rail. The tunneling machine moves on the slide rail and excavates the bottom of the wellbore until it reaches the designed depth of the wellbore. Then, the tunneling machine is dismantled and recovered.

[0019] S2: Hoist the beam plate to the position of the slide rail, and use the limiting component to keep the beam plate and the slide rail in a relatively fixed position;

[0020] S3: Insert the grouting pipe into the beam through the grouting hole. When the lower end of the grouting pipe touches the bottom of the well, inject concrete until concrete emerges from the overflow hole. Then, slowly lift the grouting pipe and stop injecting concrete.

[0021] S4: Drain excess grout above the beam and slab;

[0022] S5: Tie a steel mesh above the beam and slab, pour the bottom slab, and complete the sealing of the well shaft.

[0023] Furthermore, in step S1, multiple tunneling machines are installed at intervals on the slide rail.

[0024] The beneficial effects of this invention are:

[0025] This invention provides a shaft beam-plate bottom sealing device and its construction method, including a ring beam, a slide rail, a beam plate, and at least two limiting components. By setting the ring beam at the upper end of the cutting edge of the shaft, it does not occupy the effective excavation space at the bottom of the shaft, providing sufficient operating range for the tunneling machine. It also avoids unnecessary friction or damage to the external structures such as the ring beam, slide rail, and tunneling machine during the shaft sinking process. During the excavation stage, the slide rail can serve as the running track for the tunneling machine, allowing it to move flexibly along the circumferential direction of the slide rail and excavate the bottom of the shaft. The shaft beam-plate bottom sealing device does not obstruct the tunneling machine, thereby maintaining the effective excavation space at the bottom of the shaft and improving tunneling efficiency. During the bottom sealing stage, the slide rail and ring beam form a supporting frame, ensuring uniform stress on the beam and preventing local deformation. The limiting components effectively ensure the beam is fixed relative to the slide rail in the circumferential and radial directions of the shaft, preventing displacement or loosening due to external forces during the sealing process, thus ensuring the stability and precise positioning of the beam. Simultaneously, grouting holes and overflow holes are opened on the beam to effectively discharge excess grout from the bottom of the shaft during grouting, preventing grout accumulation that could lead to uneven thickness of the bottom sealing concrete layer and improving construction quality. Therefore, a vertical shaft beam bottom sealing device and its construction method reduce the thickness of the bottom sealing concrete layer while ensuring the excavation space for the tunneling machine, improving tunneling efficiency, ensuring the uniformity of the bottom sealing concrete layer thickness, and improving the overall strength of the bottom sealing structure. It possesses comprehensive advantages of high efficiency, stability, and cost control. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the ring beam and slide rail in this invention;

[0027] Figure 2 This is an assembly drawing of the slide rail and the tunneling machine in this invention;

[0028] Figure 3 This is the present invention. Figure 1 Cross-sectional view at point AA;

[0029] Figure 4 This is a schematic diagram of the beam-slab structure in this invention;

[0030] Figure 5 This is a schematic diagram of the structure of the shaft beam-slab bottom sealing device in this invention.

[0031] In the picture:

[0032] 100. Wellbore; 200. Wellbore body; 300. Blade feet;

[0033] 1. Ring beam; 2. Slide rail; 3. Tunneling machine; 4. Beam plate; 5. Grouting hole; 6. Overflow hole; 7. Limiting component; 71. Limiting protrusion; 72. Limiting groove; 721. First groove; 722. Second groove; 723. Column; 724. Groove. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] Please refer to Figures 1 to 5 As shown, this invention provides a shaft beam-plate bottom sealing device, which, while ensuring a reduction in the thickness of the bottom sealing concrete layer, does not affect the excavation space of the tunneling machine 3, improves tunneling efficiency, and also ensures the uniformity of the bottom sealing concrete layer thickness, thereby improving the overall strength of the bottom sealing structure. The shaft beam-plate bottom sealing device is used to seal the bottom of a shaft 100, which includes a shaft body 200 and a cutting edge 300. The cutting edge 300 is located at the bottom of the shaft body 200. The shaft beam-plate bottom sealing device includes a ring beam 1, a slide rail 2, a beam plate 4, and at least two limiting components 7. The ring beam 1 is circumferentially arranged around the upper end of the cutting edge 300, and the slide rail 2 is arranged along the inner ring of the ring beam 1. The tunneling machine 3 is detachably mounted on the slide rail 2. The tunneling machine 3 can... The beam plate 4 is capable of moving circumferentially along the slide rail 2 and excavating the bottom of the shaft 100; the beam plate 4 is provided with grouting holes 5 and overflow holes 6, the grouting holes 5 are used to inject concrete into the bottom of the shaft 100, and the overflow holes 6 are used to discharge excess grout, the outer edge of the beam plate 4 abuts against the inner edge of the slide rail 2; at least two limiting components 7 are spaced apart on the beam plate 4 and the slide rail 2 circumferentially along the shaft 100, and each limiting component 7 can fix the beam plate 4 relative to the slide rail 2 circumferentially and radially along the shaft 100.

[0039] By circumferentially surrounding the shaft 100 and setting the ring beam 1 around the upper end of the cutting edge 300, and providing a slide rail 2 along the inner ring of the ring beam 1, a tunneling machine 3 is detachably mounted on the slide rail 2; placing the ring beam 1 around the upper end of the cutting edge 300 avoids occupying the effective excavation space at the bottom of the shaft 100, providing ample operating range for the tunneling machine 3, and also prevents unnecessary friction or damage to the external structures such as the ring beam 1, slide rail 2, and tunneling machine 3 during the sinking of the shaft 100; Figure 2 As shown, during the excavation stage, the slide rail 2 serves as the running track for the tunneling machine 3. The tunneling machine 3 is installed on the slide rail 2, allowing it to move and excavate the bottom of the shaft 100 until it reaches the designed depth. Afterward, the tunneling machine 3 can be dismantled and retrieved. The tunneling machine 3 can move flexibly along the circumference of the slide rail 2 and excavate the bottom of the shaft 100. The shaft beam sealing device does not obstruct the tunneling machine 3, thus maintaining effective excavation space at the bottom of the shaft 100 and improving excavation efficiency. Figure 5 As shown, during the bottom sealing stage, the slide rail 2 serves as a supporting structure for the beam 4. The combination of the ring beam 1 and the slide rail 2 forms a continuous supporting frame surrounding the shaft 100, providing uniform load-bearing capacity for the beam 4. During bottom sealing, the beam 4, relying on this supporting structure, can form an integrated force-bearing system in the circumferential direction, preventing local deformation or uneven stress during the sealing process. By hoisting the beam 4 to the location of the slide rail 2, the limiting components 7 are used to maintain the beam 4 and slide rail 2 in a relatively fixed position. At least two limiting components 7 are spaced apart along the circumference of the shaft 100 on the beam 4 and slide rail 2. The presence of at least two limiting components 7 ensures that the beam 4, slide rail 2, and ring beam 1 form a robust integrated structure, providing multi-point support in the circumferential direction. To prevent the beam plate 4 from rotating or shifting, the strength of the shaft beam plate bottom sealing device is enhanced, which helps to fix the beam plate 4 in the circumferential and radial directions of the shaft 100, preventing it from shifting or loosening due to external forces during the bottom sealing process, and ensuring the stability and precise positioning of the beam plate 4. By having the outer edge of the beam plate 4 abut against the inner edge of the slide rail 2, and by opening grouting holes 5 and overflow holes 6 on the beam plate 4, it is possible to ensure that concrete is stably injected from the grouting holes 5. During the grouting process, excess grout at the bottom of the shaft 100 can be discharged from the overflow holes 6, preventing grout accumulation and causing uneven thickness of the bottom sealing concrete layer, thereby ensuring the uniformity of the bottom sealing concrete layer and improving the construction quality. In addition, the beam plate 4 and the cast-in-place concrete at the bottom of the shaft 100 form a semi-precast and semi-cast-in-place bottom sealing concrete layer, which effectively reduces the thickness of the bottom sealing concrete. Therefore, a vertical shaft beam-slab bottom sealing device can reduce the thickness of the bottom sealing concrete layer while ensuring the excavation space of the tunneling machine 3, improving tunneling efficiency, ensuring the uniformity of the bottom sealing concrete layer thickness, and improving the overall bottom sealing structure strength. It has comprehensive advantages of high efficiency, stability and cost control.

[0040] like Figure 5As shown, to improve the stability of the connection between the beam 4 and the slide rail 2, in some embodiments, at least two limiting components 7 are evenly distributed along the circumference of the beam 4 and the slide rail 2. This evenly distributed distribution of at least two limiting components 7 provides multiple support points, ensuring that the beam 4 is subjected to uniform force throughout the sealing process. This enhances the resistance of the connection between the beam 4 and the slide rail 2 to external forces, preventing displacement or loosening caused by external forces and reducing the risk of deformation or damage to the beam 4. The number of limiting components 7 can be set to 2, 3, 4, or 6, etc., and is not specifically limited here.

[0041] To facilitate the installation of the beam 4 and the slide rail 2, in some embodiments, the limiting component 7 includes a limiting protrusion 71 and a limiting groove 72. The limiting protrusion 71 can be selectively set on either the inner edge of the slide rail 2 or the outer edge of the beam 4, and the limiting groove 72 is formed on the other of the inner edge of the slide rail 2 or the outer edge of the beam 4. The limiting protrusion 71 and the limiting groove 72 are engaged. The engaging design of the limiting protrusion 71 and the limiting groove 72 can ensure that the beam 4 and the slide rail 2 can be quickly and accurately connected, simplifying the installation steps and reducing the construction difficulty. At the same time, the engaging design can also ensure that a firm connection is formed between the beam 4 and the slide rail 2, effectively preventing the beam 4 or the slide rail 2 from falling off and reducing the possibility of safety hazards during construction. Furthermore, the limiting protrusion 71 or the limiting groove 72 can be selectively set on either the inner edge of the slide rail 2 or the outer edge of the beam 4, which has great flexibility and can adjust the positional relationship between the beam 4 and the slide rail 2 according to specific construction conditions.

[0042] like Figure 3As shown, to enhance the fixing effect of the limiting component 7, in some embodiments, the limiting groove 72 includes a first groove 721 and a second groove 722. The first groove 721 is formed circumferentially at the middle of the inner edge of the slide rail 2 or the middle of the outer edge of the beam plate 4. The first end of the second groove 722 communicates with the first groove 721, and the second end of the second groove 722 passes through the upper edge of the slide rail 2 or the upper edge of the beam plate 4. The widths of both the first groove 721 and the second groove 722 are not less than the width of the limiting protrusion 71. The limiting protrusion 71 can slide through the second groove 722 and be positioned in the first groove 721. The limiting protrusion 71 can slide into the first groove 721 under the guidance of the second groove 722 until it is in contact with the first groove. 721 engages, thus completing the process from sliding to locking. Once the limiting protrusion 71 enters and engages with the first slide groove 721, the relative position between the beam plate 4 and the slide rail 2 is precisely locked. The second slide groove 722 provides a vertical limiting channel and cooperates with the first slide groove 721 to form a locking structure, preventing the beam plate 4 and the slide rail 2 from moving circumferentially and radially along the shaft 100, further enhancing the stability of the connection between the beam plate 4 and the slide rail 2, and preventing them from slipping off under external force or during construction operations. Since the width of the first slide groove 721 and the second slide groove 722 is not less than the width of the limiting protrusion 71, it can be ensured that the limiting protrusion 71 can pass smoothly through the second slide groove 722 and finally lock into the first slide groove 721. Furthermore, the second slide groove 722 is inclined from its second end to its first end, and the angle between the second slide groove 722 and the first slide groove 721 is in the range of 90 degrees to 150 degrees. The inclination of the second slide groove 722 from its second end to its first end and the angle between the two is 90 degrees to 150 degrees provides a certain sliding margin for the limiting protrusion 71, reduces the risk of the limiting protrusion 71 getting stuck, rubbing or not flowing smoothly, and makes the installation of the beam plate 4 smoother.

[0043] Continue as Figure 3 As shown, in order to further limit the movement range of the limiting protrusion 71, in some embodiments, a column 723 is radially arranged inside the first slide groove 721 along the well barrel 100, and the distance between the first end of the second slide groove 722 and the column 723 is not less than the width of the limiting protrusion 71; wherein the distance between the column 723 and the second slide groove 722 restricts the movement of the limiting protrusion 71 in the first slide groove 721, preventing the limiting protrusion 71 from moving beyond the predetermined range, and the column 723, as a physical boundary, restricts the movement of the limiting protrusion 71, ensuring the accuracy of the positional relationship between the beam plate 4 and the slide rail 2; at the same time, the column 723 is radially arranged inside the first slide groove 721 along the well barrel 100, which can enhance the support strength of the limiting slide groove 72.

[0044] Furthermore, to create a high-strength joint between the limiting protrusion 71 and the limiting groove 72, in some embodiments, a groove 724 is provided on the top edge of the first groove 721. The groove 724 is located between the column 723 and the first end of the second groove 722, and the limiting protrusion 71 engages with the groove 724. During grouting, the water pressure load causes the bottom sealing concrete layer to deform upwards. At this time, the groove 724 and the limiting protrusion 71 engage. The groove 724 provides a mechanical locking point to ensure that even if the limiting component 7 deforms, the limiting protrusion 71 will not easily disengage from its proper position, further enhancing the fixing force between the beam 4 and the slide rail 2.

[0045] To ensure that the limiting component 7 is properly engaged, in some embodiments, the limiting component also includes a real-time monitoring device. The real-time monitoring device can monitor whether the limiting protrusion 71 and the limiting slide 72 are properly engaged, and can promptly detect whether the limiting component 7 is properly engaged or whether there is any looseness, avoiding accidental disengagement due to improper engagement, thus improving the overall safety of the limiting component 7 structure. At the same time, the real-time monitoring device can remind construction personnel or trigger an automatic adjustment mechanism when the limiting component 7 is not properly engaged, thereby ensuring that the limiting component 7 is always in the expected working state, reducing the probability of failure, and improving the reliability of the limiting component 7.

[0046] like Figure 4 As shown, in order to improve the efficiency of bottom sealing construction, in some embodiments, multiple grouting holes 5 and multiple overflow holes 6 are provided on the beam slab 4, and the multiple grouting holes 5 and multiple overflow holes 6 are distributed sequentially and at intervals around the central axis of the beam slab 4; by setting multiple grouting holes 5, the grouting speed can be accelerated, the construction efficiency can be improved, the grouting time can be reduced, and the bottom voids can be filled quickly, thereby improving the bottom sealing efficiency; setting multiple overflow holes 6 can ensure that excess mud can be smoothly discharged during the grouting process, prevent the grout from accumulating during the bottom sealing process, and avoid unnecessary pressure accumulation or uneven thickness of the bottom sealing layer. Furthermore, multiple grouting holes 5 are opened at the center of the beam slab 4, and multiple overflow holes 6 are opened at the edge of the beam slab 4. The concentration of grouting holes 5 at the center of the beam slab 4 helps the grout to spread evenly from the center to the entire sealing area, ensuring that the grout can fill the gaps or cavities at the bottom of the beam slab 4 during the grouting process. The overflow holes 6 at the edge of the beam slab 4 can effectively help to expel air and excess grout from inside the beam slab 4, preventing the formation of air bubbles or pressure buildup inside the beam slab 4, and avoiding damage or uneven distribution of the sealing layer due to excessive pressure.

[0047] The present invention also provides a construction method for sealing the bottom of a vertical shaft beam, using the vertical shaft beam sealing device in any of the above embodiments, which includes the following steps:

[0048] S1: A ring beam 1 with a slide rail 2 is pre-embedded and installed along the circumference of the shaft 100 at the upper end of the cutting foot 300 at the bottom of the shaft 100. The shaft 100 is vertically extended into the stratum. The tunneling machine 3 is installed on the slide rail 2. The tunneling machine 3 moves on the slide rail 2 and excavates the bottom of the shaft 100 until it has been excavated to the designed depth of the shaft 100. Then the tunneling machine 3 is dismantled and recovered.

[0049] S2: Hoist the beam 4 to the position of the slide rail 2, and use the limiting component 7 to keep the beam 4 and the slide rail 2 in a relatively fixed position;

[0050] S3: Insert the grouting pipe into the beam 4 through the grouting hole 5. When the lower end of the grouting pipe touches the bottom of the well barrel 100, inject concrete until the overflow hole 6 emerges. After injecting concrete, slowly lift the grouting pipe and stop injecting concrete.

[0051] S4: Drain excess grout above beam 4;

[0052] S5: Tie the steel mesh above beam 4, pour the bottom slab, and complete the sealing of the well shaft 100.

[0053] In the construction method of sealing the bottom of the vertical shaft beam slab, during the excavation stage, the slide rail 2 can serve as the running track for the tunneling machine 3. The tunneling machine 3 is installed on the slide rail 2, allowing it to move and excavate until it reaches the designed depth of the shaft 100. After excavation, the tunneling machine 3 can be dismantled and retrieved. The tunneling machine 3 can move flexibly along the circumference of the slide rail 2 and excavate without obstruction by the bottom sealing device, thus maintaining the effective excavation space at the bottom of the shaft 100 and improving excavation efficiency. During the sealing stage, the slide rail 2 can serve as the supporting structure for the beam slab 4. Through the combination of the ring beam 1 and the slide rail 2, a continuous supporting frame surrounding the shaft 100 is formed, providing uniform load-bearing capacity for the beam slab 4. When sealing the bottom, the beam slab 4 relies on this supporting structure to form an overall force system in the circumference, making it less prone to local deformation or uneven stress during the sealing process. By hoisting the beam slab 4 to the position of the slide rail 2, the limiting component 7 is used to... The beam plate 4 and the slide rail 2 maintain a relatively fixed position. At least two limiting components 7 are spaced apart on the beam plate 4 and the slide rail 2 along the circumference of the shaft 100. The setting of at least two limiting components 7 makes the beam plate 4, the slide rail 2, and the ring beam 1 form a solid integral structure and can form multi-point support in the circumferential direction, preventing the beam plate 4 from rotating or shifting, enhancing the strength of the shaft beam plate bottom sealing device, and helping to fix the beam plate 4 in the circumferential and radial directions of the shaft 100, preventing it from shifting or loosening due to external forces during the bottom sealing process, and ensuring the stability and accurate positioning of the beam plate 4. By opening grouting holes 5 and overflow holes 6 on the beam plate 4, excess mud at the bottom of the shaft can be effectively discharged during the grouting process, preventing the accumulation of grout and causing uneven local thickness of the bottom sealing concrete layer, thereby ensuring the uniformity of the bottom sealing concrete layer and improving the construction quality. In addition, the beam plate 4 and the cast-in-place concrete at the bottom of the shaft 100 form a semi-precast and semi-cast-in-place bottom sealing concrete layer, effectively reducing the thickness of the bottom sealing concrete. Therefore, a vertical shaft beam-slab bottom sealing device can reduce the thickness of the bottom sealing concrete layer while ensuring the excavation space of the tunneling machine 3, improving tunneling efficiency, ensuring the uniformity of the bottom sealing concrete layer thickness, and improving the overall bottom sealing structure strength. It has comprehensive advantages of high efficiency, stability and cost control.

[0054] To improve excavation efficiency during the excavation process, in some embodiments, multiple tunneling machines 3 are installed at intervals on the slide rail 2 in step S1. The simultaneous operation of multiple tunneling machines 3 significantly increases the excavation progress and reduces the time consumed by a single tunneling machine 3. The coordinated operation of multiple tunneling machines 3 allows for simultaneous excavation from different areas, thereby accelerating the overall excavation speed. To improve the stability of the tunneling machines 3 during the excavation process, in some embodiments, the slide rail 2 also includes a locking element. This locking element locks the tunneling machine 3 onto the slide rail 2, allowing the tunneling machine 3 to selectively be in a locked or sliding state on the slide rail 2. The locking element ensures the stability of the tunneling machine 3 during operation, preventing it from moving or leaving its predetermined position due to vibration or external forces. By setting the locking element, when the tunneling machine 3 is in the locked state, unnecessary movement or adjustment of the tunneling machine 3 can be avoided, reducing unnecessary time waste during construction and improving excavation efficiency. When rapid movement of the tunneling machine 3 is required, it can be unlocked, making the overall construction process more efficient. The locking mechanism may, but is not limited to, using a hydraulic cylinder or a pneumatic cylinder; no specific limitations are specified here.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A shaft beam bottom sealing device, used for sealing the bottom of a shaft (100), wherein the shaft (100) comprises a shaft body (200) and a blade foot (300), wherein the blade foot (300) is arranged at the bottom of the shaft body (200), and wherein: The shaft beam and slab bottom sealing device comprises: A ring beam (1), the ring beam (1) being arranged around the upper end of the blade foot (300) along the circumference of the shaft (100), the ring beam (1) being provided with a slide rail (2) along its inner ring, a tunneling machine (3) being detachably mounted on the slide rail (2), the tunneling machine (3) being capable of moving around the slide rail (2) and excavating the bottom of the shaft (100); A beam plate (4), wherein a grouting hole (5) and an overflow hole (6) are provided on the beam plate (4), wherein the grouting hole (5) is used to inject concrete into the bottom of the shaft (100), and the overflow hole (6) is used to discharge excess grout, and the outer edge of the beam plate (4) abuts against the inner edge of the slide rail (2); At least two limit assemblies (7), at least two of the limit assemblies (7) are arranged on the beam plate (4) and the slide rail (2) at intervals along the circumference of the shaft (100), and each of the limit assemblies (7) is capable of fixing the beam plate (4) relative to the slide rail (2) along the circumference and radial direction of the shaft (100).

2. The shaft beam bottom sealing device according to claim 1, characterized in that: At least two of the limit assemblies (7) are evenly spaced and distributed in sequence along the circumference of the beam plate (4) and the slide rail (2).

3. The shaft beam bottom sealing device according to claim 2, characterized in that: The limiting assembly (7) comprises a limiting protrusion (71) and a limiting sliding groove (72); the limiting protrusion (71) can be selectively arranged on either the inner edge of the slide rail (2) or the outer edge of the beam plate (4); the limiting sliding groove (72) is provided on the other of the inner edge of the slide rail (2) or the outer edge of the beam plate (4); the limiting protrusion (71) is snap-fitted with the limiting sliding groove (72).

4. The shaft beam bottom sealing device according to claim 3, characterized in that: The limiting slide groove (72) includes a first slide groove (721) and a second slide groove (722). The first slide groove (721) is opened along the circumference of the middle part of the inner edge of the slide rail (2) or the middle part of the outer edge of the beam plate (4). The first end of the second slide groove (722) is connected to the first slide groove (721), and the second end of the second slide groove (722) passes through the upper edge of the slide rail (2) or the upper edge of the beam plate (4). The widths of the first slide groove (721) and the second slide groove (722) are not less than the width of the limiting protrusion (71). The limiting protrusion (71) can slide through the second slide groove (722) and be positioned in the first slide groove (721).

5. The shaft beam bottom sealing device according to claim 4, characterized in that: The second sliding groove (722) is inclined from its second end toward its first end, and the angle between the second sliding groove (722) and the first sliding groove (721) is in the range of 90 degrees to 150 degrees.

6. The shaft beam bottom sealing device according to claim 5, characterized in that: A column (723) is arranged inside the first slide groove (721) along the radial direction of the shaft (100), and the distance between the first end of the second slide groove (722) and the column (723) is not less than the width of the limiting protrusion (71).

7. The shaft beam bottom sealing device according to claim 6, characterized in that: A groove (724) is provided on the top edge of the first slide groove (721), and the groove (724) is located between the column (723) and the first end of the second slide groove (722), and the limiting protrusion (71) is engaged with the groove (724).

8. The shaft beam bottom sealing device according to any one of claims 1 to 7, characterized in that: The beam slab (4) is provided with a plurality of grouting holes (5) and a plurality of overflow holes (6), and the plurality of grouting holes (5) and the plurality of overflow holes (6) are distributed in sequence and at intervals around the central axis of the beam slab (4).

9. A construction method for bottom sealing of a vertical shaft beam and slab, characterized in that: The shaft beam and slab bottom sealing device according to any one of claims 1 to 8 is used, which comprises the following steps: S1: pre-embed the ring beam (1) having the slide rail (2) at the upper end of the blade foot (300) of the shaft (100) along the circumference of the shaft (100), push the shaft (100) vertically into the ground, install the tunnel boring machine (3) on the slide rail (2), move the tunnel boring machine (3) on the slide rail (2) and dig the bottom of the shaft (100) until the shaft (100) is dug to the designed depth, and then dismantle and recover the tunnel boring machine (3); S2: hoisting the beam plate (4) to the position where the slide rail (2) is located, and maintaining the beam plate (4) and the slide rail (2) in a relatively fixed position by means of the limiting assembly (7); S3: inserting a grouting pipe into the beam slab (4) through the grouting hole (5), and injecting concrete when the lower end of the grouting pipe touches the bottom of the shaft (100), until the overflow hole (6) emits injected concrete, and then slowly lifting the grouting pipe to stop injecting concrete; S4: draining the excess slurry above the beam and slab (4); S5: Tie a steel mesh above the beam (4), cast the bottom plate, and complete the bottom sealing of the shaft (100).

10. The construction method for bottom sealing of shaft beam slab according to claim 9, characterized in that: In the step S1, a plurality of the tunneling machines (3) are installed at intervals on the slide rail (2).

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