Reinforcement cage for underwater bottom sealing construction of vertical shaft and mounting method of reinforcement cage

Abstract

The invention provides a reinforcement cage for underwater bottom sealing construction of a vertical shaft and a mounting method thereof, the reinforcement cage is used for underwater bottom sealing of the vertical shaft, and the reinforcement cage comprises a ring pipe piece, a steel blade foot, a main beam, a reinforcement cage body and bottom sealing concrete; a plurality of groups of ring pipe pieces are adopted, the plurality of groups of ring pipe pieces are stacked in parallel in the depth direction of the vertical shaft to form a shaft, and the ring pipe piece located at the tail of the plurality of groups of stacked ring pipe pieces is connected with the steel blade foot; the multiple sets of steel blade feet are evenly distributed on the inner wall of the lower section of the vertical shaft in the circumferential direction, and grooves are formed in the steel blade feet. The main beam is connected with the reinforcement cage through a cross-shaped structure, the main beam of the cross-shaped structure is arranged in the diameter direction of the circular cage frame and used for hoisting the circular cage frame, and the end of the main beam of the cross-shaped structure is limited in the groove through a stretching structure; the steel reinforcement cage is a circular cage frame formed by splicing at least four sets of fan-shaped frames, and the top of the steel reinforcement cage is connected with the main beam through steel bars and used for being matched with bottom sealing concrete to reinforce the bottom sealing of the vertical shaft.

Description

Technical Field

[0001] The invention relates to the technical field of underwater bottom sealing of a vertical shaft, and in particular to a steel cage for underwater bottom sealing construction of a vertical shaft and an installation method thereof. Background Art

[0002] For the existing underwater bottom sealing technology of vertical shafts, the bottom is usually sealed by directly pouring concrete, which has poor anti-floating and anti-shearing capabilities, and thicker concrete needs to be poured to ensure the quality of the bottom sealing concrete. Therefore, a steel cage structure that is easy to construct is needed to effectively improve the stress performance of the bottom sealing concrete layer and the connection effect between the bottom sealing concrete layer and the vertical shaft structure itself. Summary of the invention

[0003] The purpose of the present invention is to provide a steel cage for underwater bottom sealing construction of a shaft and an installation method thereof, which has good anti-floating and anti-shearing capabilities, ensures the quality of bottom sealing concrete, improves the stress performance of the bottom sealing concrete layer and the connection effect between the bottom sealing concrete layer and the shaft's own structure.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A steel cage for underwater bottom sealing construction of a vertical shaft, used for underwater bottom sealing of a vertical shaft, the vertical shaft is preset below the ground plane, and comprises annular segments, steel blade feet, main beams, steel cages and bottom sealing concrete; the annular segments are in a plurality of groups, and the annular segments in the plurality of groups are stacked in parallel along the depth direction of the vertical shaft to form a shaft, and the annular segments at the end of the stacked plurality of groups of annular segments are connected to the steel blade feet; the steel blade feet are in a plurality of groups, and are evenly distributed on the inner wall of the lower section of the vertical shaft in the circumferential direction, and the steel blade feet are provided with There is a groove, which is used to limit the displacement of the main beam; the main beam is connected to the steel cage by a cross structure, the main beam of the cross structure is arranged along the diameter direction of the circular cage, and is used to hoist the circular cage, and the end of the main beam of the cross structure is limited in the groove by a stretching structure; the steel cage adopts at least four groups of fan-shaped frames to splice into a circular cage, and the top of the steel cage is connected to the main beam by steel bars, which is used to cooperate with the bottom concrete to reinforce the bottom of the shaft.

[0006] Preferably, the annular segments are prefabricated assembled concrete segments, including at least four groups of shaft segments. The shaft segments are wedge-shaped, and the four groups of wedge-shaped shaft segments are assembled and connected to form an annular annular segment.

[0007] Preferably, two adjacent groups of shaft segments among the four groups of shaft segments are installed in opposite directions and are assembled with staggered seams. The shaft segments among the annular segments adopt a wedge-shaped structure, and the angle between the wedge edge and the vertical plane is 30°, which is used to improve the overall vertical and lateral stiffness of the shaft structure.

[0008] Preferably, each group of the shaft segments is provided with two hoisting holes, and the plane formed by the hoisting holes and the center of gravity of the shaft segments is perpendicular to the horizontal plane, so as to ensure the verticality of the segments during hoisting.

[0009] Preferably, the main beam of the cross-shaped structure is formed by stacking two steel structures to form four legs; an extension structure is arranged on the main beam of the cross-shaped structure, and the extension structure is connected to a control mechanism, and the extension of the extension structure is controlled by the control mechanism to extend the length of the main beam, so that the end of the main beam of the cross-shaped structure extends into the groove to achieve positioning; the length of the main beam when the extension structure is not opened is shorter than the diameter of the wellbore formed by several groups of stacked annular segments, so as to avoid collision between the main beam steel structure and the wellbore due to wellbore deviation.

[0010] Preferably, the extension structure includes four groups of telescopic rings, which are respectively arranged on the four legs of the cross-shaped structure of the main beam. The telescopic rings are controlled to extend and open by a control mechanism, thereby extending the length of the main beam, so that the end of the main beam of the cross-shaped structure extends into the groove to achieve limiting.

[0011] Preferably, a receiving device of an in-place sensor is provided in the groove, and a transmitting device of an in-place sensor is provided on the four legs of the cross-shaped structure. The receiving device matches the transmitting device, and the receiving device is used to receive the signal of the generating device to confirm the in-place status of the main beam, thereby triggering the control system to control the telescopic ring to extend and open.

[0012] Preferably, the annular segment connected to the steel blade foot and located at the end of stacking has a groove on the side facing the center of the shaft, and the groove is used to cooperate with the bottom sealing concrete to reinforce the bottom sealing of the shaft.

[0013] The invention also discloses a method for installing a steel cage for underwater bottom sealing construction of a vertical shaft, comprising the following steps:

[0014] Step S1: Install the ring segment:

[0015] After the shaft excavation is completed and before the bottom sealing work begins, the lifting equipment will lift the shaft segments with four sets of preset bolt holes into the shaft through the lifting holes. The plane formed by the lifting holes and the center of gravity of the shaft segments is exactly perpendicular to the horizontal plane, thus ensuring the verticality of the shaft segments during lifting;

[0016] After four groups of shaft segments are connected by screws and bolts to form a ring segment, the next ring segment is assembled, and multiple ring segments are stacked and installed on the inner wall of the shaft;

[0017] Step S2: Install the steel blade foot:

[0018] A plurality of steel blade feet are placed under the last ring segment of the stacked groups of ring segments. The plurality of steel blade feet are arranged circumferentially along the inner wall of the bottom of the shaft. A groove is pre-formed on each steel blade foot to limit the end of the main beam to prevent the main beam from being displaced after installation.

[0019] Step S3: Install the main beam and reinforcement cage:

[0020] Eight groups of steel cages are used, each group of steel cages adopts a fan-shaped structure of the same size, and the fan-shaped frames are spliced ​​into an integral circular cage frame. The top of the circular cage frame is connected to the main beam of the cross-shaped structure through steel bars for hoisting the circular cage frame;

[0021] Step S4: Hoisting the circular cage:

[0022] The hoisting equipment hoists the main beam of the assembled circular cage into the shaft and moves it to the center of the shaft. The connection points on the main beam lift the circular cage together, and lower the main beam and the circular cage synchronously along the height direction of the shaft, and position them during the lowering process by measuring ropes;

[0023] When the receiving device of the in-position sensor on the steel blade foot receives the signal emitted by the transmitting device of the in-position sensor at the end of the main beam, the control mechanism controls the telescopic ring of the main beam to extend, thereby extending the length of the main beam. When it is extended to the maximum length, it is locked and no longer extended. At this time, the main beam and the circular cage are considered to be lowered into place as a whole. At this time, the end of the main beam is extended into the groove to achieve limit, and then the connection between the crane and the main beam is released;

[0024] Step S5: pouring bottom concrete:

[0025] The concrete is poured continuously through the conduit method, and the bottom sealing concrete immerses the bottom of the shaft, so that the main beam, steel cage, steel blade foot and the pipe segment around the steel blade foot form the shaft bottom sealing structure.

[0026] Preferably, in step S1, in order to ensure the force effectiveness after the segments are assembled, the installation directions of two adjacent segments are opposite, staggered assembly is adopted, and the annular segment with a longer arc length at the bottom of the shaft is installed first, and then the annular segment with a smaller arc length at the bottom is installed;

[0027] In step S3, a connection point is set near the end of each main beam, and the position of the connection point is determined according to the diameter of the steel cage; the two main beams are assembled into a cross structure by welding, and the main beams of the cross structure are set along the diameter direction of the circular cage frame for hoisting the steel cage.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The present invention connects the steel cage and the shaft structure as a whole, thereby improving the shear resistance and anti-floating ability of the bottom sealing concrete.

[0030] (2) In the present invention, the main beam is arranged along the diameter direction of the shaft and intersects at the center of the shaft, forming a "cross" shape. A telescopic ring is arranged on the main beam to control the opening and extension of the telescopic ring. When it is lowered to the groove of the steel blade foot, it extends to the groove position, so that the main beam can be stably set on the steel blade foot, thereby stably fixing the steel cage at the bottom of the shaft.

[0031] (3) The present invention forms a bottom sealing structure of the shaft bottom by pouring bottom sealing concrete to connect the concrete with the shaft segments, steel blade feet and steel cage.

[0032] (4) The present invention installs two adjacent shaft segments in opposite directions and performs staggered assembly, which can ensure the force effectiveness of the annular segments after assembly.

[0033] (5) The present invention uses an in-place sensor to detect the position of the main beam and the groove, thereby more accurately placing the steel cage at the bottom of the shaft, which is convenient for later pouring and sealing the bottom.

[0034] In summary, the overall structure of this construction method is simple, the positioning is accurate, and there is no need for workers to perform underground positioning or assembly, thus ensuring the safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a front cross-sectional structure of a steel cage used for underwater bottom sealing construction of a vertical shaft provided by an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the top view structure of a steel cage used for underwater bottom sealing construction of a vertical shaft provided by an embodiment of the present invention;

[0037] Figure 3 A schematic structural diagram of a steel cage in a steel cage for underwater bottom sealing construction of a vertical shaft provided by an embodiment of the present invention;

[0038] Figure 4 A workflow diagram of a method for installing a reinforcement cage for underwater bottom sealing construction of a vertical shaft provided in an embodiment of the present invention.

[0039] The serial numbers in the figure are as follows:

[0040] 1. Annular segment; 2. Main beam; 3. Steel cage; 4. Steel blade foot; 5. Bottom sealing concrete; 6. Expansion ring; 7. Groove; 8. Connection point. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] like Figures 1 to 3 As shown, a steel cage for underwater bottom sealing construction of a vertical shaft provided in this embodiment is used for underwater bottom sealing of the vertical shaft. The vertical shaft is preset below the ground level and includes an annular segment 1, a steel blade foot 4, a main beam 2, a steel cage 3 and bottom sealing concrete 5.

[0043] The annular segments 1 are prefabricated assembled concrete segments, and a shaft is formed by stacking several groups of annular segments 1 in parallel along the depth direction of the shaft, and the annular segment 1 at the end of the stacked groups of annular segments 1 is connected to the steel blade foot 4.

[0044] Each group of annular segments 1 includes four groups of vertical shaft segments. The vertical shaft segments are wedge-shaped. The four groups of wedge-shaped vertical shaft segments are assembled and connected to form an annular annular segment 1.

[0045] Furthermore, in this embodiment, the installation directions of two adjacent groups of vertical shaft segments among the four groups of vertical shaft segments are opposite, and staggered assembly is adopted. The vertical shaft segments in the annular segments 1 adopt a wedge-shaped structure, and the angle between the wedge edge and the vertical plane is 30°, which is used to improve the overall vertical and lateral stiffness of the vertical shaft structure.

[0046] In addition, each group of shaft segments is provided with two lifting holes, and the plane formed by the lifting holes and the center of gravity of the shaft segments is perpendicular to the horizontal plane, thereby ensuring the verticality of the shaft segments during lifting.

[0047] The steel blade feet 4 are provided in several groups and are evenly distributed on the inner wall of the lower section of the shaft in the circumferential direction. The steel blade feet 4 are provided with grooves 7 for limiting the displacement of the main beam 2 .

[0048] The main beam 2 is connected to the steel cage 3 with a cross structure. The main beam 2 with the cross structure is formed by stacking two steel structures to form four legs. The main beam 2 with the cross structure is arranged along the diameter direction of the circular cage frame for hoisting the circular cage frame.

[0049] The end of the main beam 2 of the cross-shaped structure is limited in the groove 7 by the extension structure. The extension structure is arranged on the main beam 2 of the cross-shaped structure. The extension structure is connected to the control mechanism. The extension structure is controlled by the control mechanism to extend, thereby extending the length of the main beam 2, so that the end of the main beam 2 of the cross-shaped structure extends into the groove 7 to achieve the limit. The length of the main beam 2 when the extension structure is not opened is shorter than the diameter of the wellbore formed by several groups of superimposed annular segments 1, which is used to avoid the collision between the steel structure of the main beam 2 and the wellbore due to the deviation of the wellbore.

[0050] Furthermore, in this embodiment, the extension structure includes four groups of telescopic rings 6, which are respectively arranged on the four legs of the cross-shaped structure of the main beam 2. The telescopic rings 6 are extended and opened by controlling the control mechanism, thereby extending the length of the main beam 2, so that the end of the main beam 2 of the cross-shaped structure is extended into the groove 7 to achieve limiting.

[0051] A receiving device of an in-place sensor is provided in the groove 7, and a transmitting device of an in-place sensor is provided on the four legs of the cross-shaped structure. The receiving device matches the transmitting device, and the receiving device is used to receive the signal of the generating device to confirm the in-place status of the main beam 2, thereby triggering the control system to control the telescopic ring 6 to extend and open.

[0052] The steel cage 3 is enclosed by eight groups of fan-shaped frames and spliced ​​together to form a circular cage frame. The top of the steel cage 3 is connected to the main beam 2 through steel bars, which is used to cooperate with the bottom concrete 5 to reinforce the bottom of the shaft.

[0053] Furthermore, in this embodiment, the annular segment 1 connected to the steel blade foot 4 and located at the end of the stacking has a groove on one side facing the center of the shaft, and the groove is used to cooperate with the bottom sealing concrete 5 to reinforce the bottom sealing of the shaft.

[0054] like Figure 4 As shown, the present invention also provides a method for installing a steel cage for underwater bottom sealing construction of a vertical shaft, comprising the following steps:

[0055] Step S1: Installing the ring segment 1:

[0056] After the shaft excavation is completed and before the bottom sealing work begins, the lifting equipment will lift the shaft segments with four sets of preset bolt holes into the shaft through the lifting holes. The plane formed by the lifting holes and the center of gravity of the shaft segments is exactly perpendicular to the horizontal plane, thus ensuring the verticality of the shaft segments during lifting;

[0057] After four groups of shaft segments are connected by screws and bolts to form a ring-shaped ring segment 1, the next ring segment is assembled, and multiple ring segments 1 are stacked and installed on the inner wall of the shaft;

[0058] In order to ensure the effectiveness of the force after the segments are assembled, the installation directions of two adjacent segments 1 are opposite, and staggered assembly is adopted. The annular segment 1 with a longer arc length at the bottom of the shaft is installed first, and then the annular segment 1 with a smaller arc length at the bottom is installed.

[0059] Step S2: Install the steel blade foot 4:

[0060] A plurality of steel blade feet 4 are placed under the last annular segment 1 in the stacked groups of annular segments 1. The plurality of steel blade feet 4 are arranged circumferentially along the inner wall of the bottom of the shaft. A groove 7 is pre-formed on each steel blade foot 4 to limit the end of the main beam 2 to prevent the main beam 2 from being displaced after installation.

[0061] Step S3: Install the main beam 2 and the steel cage 3:

[0062] Eight groups of steel cages 3 are used, and each group of steel cages 3 adopts a fan-shaped structure of the same size. The fan-shaped frames are spliced ​​into an integral circular cage frame. The top of the circular cage frame is connected to the main beam 2 of the cross-shaped structure through steel bars for hoisting the circular cage frame;

[0063] A connection point 8 is set near the end of each main beam 2, and the position of the connection point 8 is determined according to the diameter of the steel cage 3; the two main beams are assembled into a cross-shaped structure by welding, and the main beams 2 of the cross-shaped structure are set along the diameter direction of the circular cage frame for hoisting the steel cage 3. The position of the connection point 8 is related to the diameter of the steel cage 3, and the setting position of the connection point cannot be larger than the diameter of the steel cage.

[0064] Step S4: Hoisting the circular cage:

[0065] The hoisting equipment hoists the main beam 2 of the assembled circular cage into the shaft and moves it to the center of the shaft. The connection point 8 on the main beam lifts the circular cage together, and the main beam 2 and the circular cage are lowered synchronously along the height direction of the shaft, and are positioned by measuring ropes during the lowering process;

[0066] When the receiving device of the in-position sensor on the steel blade foot 4 receives the signal emitted by the transmitting device of the in-position sensor at the end of the main beam 2, the control mechanism controls the telescopic ring 6 of the main beam to extend, thereby extending the length of the main beam 2. When it is extended to the maximum length, it is locked and no longer extends. At this time, the main beam 2 and the circular cage are considered to be lowered into place as a whole. At this time, the end of the main beam 2 extends into the groove 7 to achieve limit, and then the connection between the crane and the main beam 2 is released;

[0067] Step S5: pouring bottom seal concrete 5:

[0068] The concrete is continuously poured by the conduit method, and the bottom sealing concrete 5 immerses the bottom of the shaft, so that the main beam, the steel cage, the steel blade foot and the pipe segment 1 around the steel blade foot 4 form a shaft bottom sealing structure.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel cage for underwater bottom sealing of a vertical shaft, used for underwater bottom sealing of a vertical shaft, wherein the vertical shaft is preset below the ground level, and is characterized in that: It comprises an annular segment (1), a steel blade foot (4), a main beam (2), a steel cage (3) and a bottom sealing concrete (5); The annular segments (1) are in a plurality of groups, and the groups of annular segments (1) are stacked in parallel along the depth direction of the shaft to form a shaft, and the annular segment (1) at the end of the stacked groups of annular segments (1) is connected to the steel blade foot (4); The steel blade feet (4) are provided in a plurality of groups and are evenly distributed on the inner wall of the lower section of the shaft in the circumferential direction. A groove (7) is provided on the steel blade feet (4), and the groove (7) is used to limit the displacement of the main beam (2); The main beam (2) is connected to the steel cage (3) by a cross-shaped structure, the main beam (2) of the cross-shaped structure is arranged along the diameter direction of the circular cage frame, and is used to hoist the circular cage frame, and the end of the main beam (2) of the cross-shaped structure is limited in the groove (7) by a stretching structure; The steel cage (3) is formed by splicing at least four groups of fan-shaped frames into a circular cage frame. The top of the steel cage (3) is connected to the main beam (2) through steel bars, and is used to cooperate with the bottom sealing concrete (5) to reinforce the bottom sealing of the shaft.

2. A steel cage for underwater bottom sealing construction of a vertical shaft according to claim 1, characterized in that: The annular pipe segment (1) is a prefabricated assembled concrete pipe segment, comprising at least four groups of vertical shaft pipe segments, wherein the vertical shaft pipe segments are wedge-shaped, and the four groups of wedge-shaped vertical shaft pipe segments are assembled and connected to form an annular annular pipe segment (1).

3. A steel cage for underwater bottom sealing construction of a vertical shaft according to claim 2, characterized in that: Two adjacent groups of shaft segments in the four groups are installed in opposite directions and are assembled by staggered joints. The shaft segments in the annular segments (1) adopt a wedge-shaped structure, and the angle between the wedge edge and the vertical plane is 30°, which is used to improve the overall vertical and horizontal rigidity of the shaft structure.

4. A steel cage for underwater bottom sealing construction of a vertical shaft according to claim 2, characterized in that: Each group of the shaft segments is provided with two hoisting holes, and the plane formed by the hoisting holes and the center of gravity of the shaft segments is perpendicular to the horizontal plane, thereby ensuring the verticality of the segments during hoisting.

5. A steel cage for underwater bottom sealing construction of a vertical shaft according to claim 2, characterized in that: The main beam (2) of the cross-shaped structure is formed by stacking two steel structures to form four legs; an extension structure is arranged on the main beam (2) of the cross-shaped structure, and the extension structure is connected to a control mechanism, and the extension structure is controlled by the control mechanism to extend, thereby extending the length of the main beam (2), so that the end of the main beam (2) of the cross-shaped structure extends into the groove (7) to achieve position limiting; The length of the main beam (2) when the extension structure is not opened is shorter than the diameter of the wellbore formed by a plurality of groups of stacked annular segments (1), so as to avoid collision between the steel structure of the main beam (2) and the wellbore due to wellbore deviation.

6. A steel cage for underwater bottom sealing construction of a vertical shaft according to claim 5, characterized in that: The extension structure comprises four groups of telescopic rings (6), which are respectively arranged on four legs of the cross-shaped structure of the main beam (2). The telescopic rings (6) are controlled by a control mechanism to extend and open, thereby extending the length of the main beam (2), so that the end of the main beam (2) of the cross-shaped structure extends into the groove (7) to achieve position limiting.

7. A steel cage for underwater bottom sealing construction of a vertical shaft according to claim 6, characterized in that: A receiving device of an in-place sensor is arranged in the groove (7), and a transmitting device of an in-place sensor is arranged on the four legs of the cross-shaped structure. The receiving device matches the transmitting device and is used to receive a signal from the generating device to confirm the in-place status of the main beam (2), thereby triggering a control system to control the telescopic ring (6) to extend and open.

8. The steel cage for underwater bottom sealing construction of a vertical shaft according to claim 1, characterized in that: The annular segment (1) connected to the steel blade foot (4) and located at the end of the stacking has a groove on one side facing the center of the shaft, and the groove is used to cooperate with the bottom sealing concrete (5) to reinforce the bottom sealing of the shaft.

9. A method for installing a steel cage for underwater bottom sealing construction of a vertical shaft based on claims 1 to 8, characterized in that: The steps include: Step S1: Installing the ring segment (1): After the shaft excavation is completed and before the bottom sealing work begins, the lifting equipment will lift the shaft segments with four sets of preset bolt holes into the shaft through the lifting holes. The plane formed by the lifting holes and the center of gravity of the shaft segments is exactly perpendicular to the horizontal plane, thus ensuring the verticality of the shaft segments during lifting; After four groups of shaft segments are connected by screws and bolts to form an annular ring segment (1), the next ring segment is assembled, and multiple ring segments (1) are stacked and installed on the inner wall of the shaft; Step S2: Install the steel blade foot (4): A plurality of steel blade feet (4) are placed under the last annular segment (1) in the stacked plurality of groups of annular segments (1), the plurality of steel blade feet (4) being arranged circumferentially along the inner wall of the bottom of the shaft, and each steel blade foot (4) being pre-arranged with a groove (7) for limiting the end of the main beam (2) to prevent the main beam (2) from being displaced after installation; Step S3: Install the main beam (2) and the steel cage (3): Eight groups of steel cages (3) are used, each group of steel cages (3) uses a fan-shaped structure of the same size, and the fan-shaped frames are spliced ​​into an integral circular cage frame. The top of the circular cage frame is connected to a main beam (2) of a cross-shaped structure through steel bars for hoisting the circular cage frame; Step S4: Hoisting the circular cage: The lifting equipment hoists the main beam (2) of the assembled circular cage into the shaft and moves it to the center of the shaft. The connection point (8) on the main beam lifts the circular cage together, and the main beam (2) and the circular cage are lowered synchronously along the height direction of the shaft, and are positioned by measuring ropes during the lowering process. When the receiving device of the in-position sensor on the steel blade foot (4) receives the signal emitted by the transmitting device of the in-position sensor at the end of the main beam (2), the control mechanism controls the telescopic ring (6) of the main beam to extend, thereby extending the length of the main beam (2). When extended to the maximum length, it is locked and no longer extends. At this time, the main beam (2) and the circular cage are considered to be lowered into place as a whole. At this time, the end of the main beam (2) extends into the groove (7) to achieve limit, and then the connection between the crane and the main beam (2) is released; Step S5: pouring bottom seal concrete (5): The concrete is continuously poured by the conduit method, and the bottom sealing concrete (5) immerses the bottom of the shaft, so that the main beam, the steel cage, the steel blade foot and the ring segment (1) with the steel blade foot (4) form a shaft bottom sealing structure.

10. A method for installing a steel cage for underwater bottom sealing construction of a vertical shaft based on claims 1 to 6, characterized in that: In the step S1, in order to ensure the force effectiveness after the segments are assembled, the installation directions of two adjacent segments (1) are opposite, staggered assembly is adopted, and the annular segment (1) with a longer arc length at the bottom of the shaft is installed first, and then the annular segment (1) with a shorter arc length at the bottom is installed; In step S3, a connection point (8) is provided near the end of each main beam (2), and the position of the connection point (8) is determined according to the diameter of the steel cage (3); the two main beams are assembled into a cross-shaped structure by welding, and the main beam (2) of the cross-shaped structure is provided along the diameter direction of the circular cage frame for hoisting the steel cage (3).

Images