A thin-walled steel plate anti-deformation supporting structure and method for the lining of an artificial energy storage chamber

Abstract

The application discloses a kind of lining thin-walled steel plate anti-deformation support structure and method of artificial energy storage chamber, belong to underground engineering supporting technical field, the overall design of the present application adopts central spindle combined with axial multiple groups of main support structure, each group of main support includes 24 independent radial adjustment support units distributed uniformly in circumference, cooperate with the walking system of alternately arranged telescopic and fixed roller, and high-precision correction of steel plate roundness is realized by staged and fractional synchronous jacking process.The present application shortens single segment supporting cycle, reduces roundness error, can be adapted to different specifications of steel plate lining, without personnel operation in narrow space, suitable for the steel plate lining construction of various large-diameter high-pressure artificial energy storage chamber.

Description

Technical Field

[0001] This invention relates to the field of underground engineering support construction technology, and in particular to a deformation-resistant support structure and method for the inner lining of an artificial energy storage chamber using thin-walled steel plates. Background Technology

[0002] Artificial energy storage chambers are the core infrastructure of large-scale energy storage systems. They typically adopt a composite structure of "surrounding rock + concrete lining + thin-walled steel plate lining". The thin-walled steel plate lining mainly bears the sealing and pressure-bearing function of high-pressure gas or liquid. Its roundness accuracy and structural integrity directly determine the service life and operational safety of the energy storage chamber.

[0003] Currently, the construction of thin-walled steel plate linings generally adopts the process of "segmented assembly, segmental splicing, and post-concrete pouring." During construction, the circular segments of the steel plates are prone to defects such as elliptical deformation, local depressions, or bulges during hoisting, transportation, splicing, and concrete pouring. Existing technologies mainly use full-span scaffolding combined with temporary steel supports for support, which has the following significant drawbacks: Construction efficiency is extremely low. The erection and dismantling of full-span scaffolding is time-consuming and labor-intensive, and the construction cycle for a single section of steel plate support can be as long as 3-5 days, which seriously restricts the overall project progress. The roundness control accuracy is poor. Traditional steel supports are single-point or multi-point asynchronous supports, which makes it difficult to ensure uniform stress on the steel plate ring, and is prone to local stress concentration and permanent deformation. The adaptability is poor. The existing support structure is a fixed design and cannot be adapted to steel plate liners and transport trolleys of different diameters and heights. It is not reusable. Temporary steel supports are mostly cut and welded on site and used only once, resulting in serious material waste and high construction costs. Summary of the Invention

[0004] The purpose of this invention is to provide a deformation-resistant support structure and method for the inner lining of an artificial energy storage chamber using thin-walled steel plates, thereby solving the technical problems of low construction efficiency, poor roundness control accuracy, weak adaptability, non-reusability, and high safety risks in the prior art.

[0005] To achieve the above objectives, the present invention provides a deformation-resistant support structure for the inner lining of an artificial energy storage chamber using thin-walled steel plates. The structure includes a main shaft, on the surface of which at least two sets of main support structures are axially arranged. Each set of main support structures includes multiple independently telescopic adjustment structures distributed circumferentially along the main shaft. These adjustment structures are used to extend and retract radially along the main shaft to support and adjust the roundness of the steel plate lining. A traveling system is provided at the lower end of the main shaft. The traveling system includes telescopic support roller structures and fixed support roller structures arranged at intervals. The telescopic support roller structures and the fixed support roller structures are respectively located at different axial positions on the main shaft, used to drive the support structure to move axially along the inner lining of the steel plate.

[0006] Preferably, the adjustment structure includes a fixed sleeve and a telescopic top rod. One end of the fixed sleeve is connected to the main shaft, and the other end is slidably connected to the telescopic top rod. The telescopic top rod is used to extend and retract radially along the main shaft to contact or disengage from the steel plate liner.

[0007] Preferably, the telescopic support roller structure includes a first roller frame assembly, a telescopic actuator, and a first traveling roller; the first roller frame assembly includes a first oblique support rod and a first transverse support rod, the axis of the first transverse support rod is perpendicular to the axis of the main shaft in the horizontal plane, the first oblique support rod is symmetrically arranged at both ends of the first transverse support rod, and the two ends of the first oblique support rod are respectively fixedly connected to the outer surface of the main shaft and the outer end of the first transverse support rod; the telescopic actuator is vertically fixed to the lower surface of both ends of the first transverse support rod, and its telescopic end is fixedly connected downward to the first traveling roller; The fixed support roller structure includes a second roller frame assembly, a fixed support rod, and a second traveling roller; the second roller frame assembly includes a second oblique support rod and a second transverse support rod, and the second roller frame assembly has the same structure as the first roller frame assembly; the fixed support rod is vertically fixed to the lower surface of both ends of the second transverse support rod, and its lower end is fixedly connected to the second traveling roller.

[0008] Preferably, the telescopic actuator is a hydraulic cylinder or an electric push rod, and the extension length of the telescopic actuator is greater than the length of the fixed support rod, so as to adapt to the inner wall support requirements of transport trolleys of different heights and steel plate liners.

[0009] This invention also discloses a method for preventing deformation of the thin-walled steel plate lining of an artificial energy storage chamber, comprising the following steps: S1. Assemble multiple steel plates into a complete ring on the assembly trolley, hoist it onto the transport trolley, adjust the extension distance of the main support structure, and push the support structure to the outer edge of the steel plate ring; S2. Adjust the telescopic actuator of the telescopic support roller structure so that the centerline of the support structure coincides with the centerline of the steel plate ring; push the front end of the support structure into the steel plate ring so that the second traveling roller of the front fixed support roller structure fits against the bottom of the inner wall of the steel plate ring; if the traveling height is not matched, extend the telescopic support roller unit located behind the front fixed support roller unit into the steel plate ring, and adjust the telescopic support roller structure to make the first traveling roller fit against the bottom of the inner wall of the steel plate ring, thus completing the adaptation; S3. Continue pushing the support structure. After the fixed support roller structure is completely inside the steel plate, retract the first set of telescopic support roller structure and continue pushing until the second set of fixed support roller structure contacts the inner wall of the steel plate. Then retract the second set of telescopic support roller structure and push the support structure to the preset position inside the steel plate. S4. Start the radial support rods on the main support structure in stages to simultaneously support the inner lining of the steel plate at multiple points and correct the steel plate to a standard circle. S5. Transfer the transport trolley together with the steel plate lining and support structure to the steel plate section that has been poured in the previous ring. Fine-tune the radial support rods to make the roundness of the two steel plate sections consistent. After the circumferential welding of the pipe segment splicing is completed, lock all radial support rods. S6. Concrete is poured behind the wall using the support structure as an internal rigid support. After the concrete has completely solidified, all radial support rods are contracted, and the support structure is pushed out of the steel plate lining as a whole for reuse in subsequent construction.

[0010] Preferably, in step S4, the radial support rod is activated synchronously in stages to avoid excessive single-point support force causing local deformation of the steel plate.

[0011] Preferably, in step S3, the retraction sequence of the telescopic support roller structure is as follows: first, the front telescopic support roller structure is retracted along the pushing direction, and then the rear telescopic support roller structure is retracted.

[0012] Therefore, the present invention employs the above-mentioned anti-deformation support structure and method for the inner lining of an artificial energy storage chamber using thin-walled steel plates, and has the following technical effects: (1) The present invention adopts an integral movable support structure, which eliminates the need to erect and dismantle full-span scaffolding, shortens the construction cycle of single-section steel plate support, and improves construction efficiency.

[0013] (2) The present invention uses 24 high-density adjustable support units that are evenly distributed around the circumference to provide synchronous support in stages and times, so as to achieve continuous and uniform force on the entire circumference of the steel plate ring and eliminate local stress concentration.

[0014] (3) The walking system of the present invention adopts a design that combines telescopic and fixed rollers, which can be adapted to steel plate liners of different specifications and various transport trolleys, and has good versatility.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to the present invention. Figure 2This is a schematic diagram of the anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to the present invention; Figure 3 This is a cross-sectional view of the anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to the present invention. Figure 4 This is a schematic diagram of the main support structure in the anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to the present invention. Figure 5 This is a schematic diagram of the walking system structure in the anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to the present invention.

[0017] Figure Labels 1. Main shaft; 2. Main support structure; 3. Adjustable support unit; 31. Fixed sleeve; 32. Telescopic top rod; 4. Telescopic support roller unit; 41. First roller frame; 411. First diagonal support rod; 412. First transverse support rod; 42. Telescopic actuator; 43. First traveling roller; 5. Fixed support roller unit; 51. Second roller frame; 511. Second diagonal support rod; 512. Second transverse support rod; 52. Fixed support rod; 53. Second traveling roller; 6. Steel plate lining; 7. Transport trolley. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 5 As shown, a thin-walled steel plate anti-deformation support structure for the inner lining of an artificial energy storage chamber mainly includes four parts: main shaft 1, main support structure 2, adjustment support unit 3, and walking system.

[0021] The main shaft 1 is made of seamless steel pipe, and its length is determined according to the segment length of the steel plate lining 6. At least two sets of main support structures 2 are arranged axially at intervals on the surface of the main shaft 1. In this embodiment, three sets are arranged, located at the front end, middle and rear end of the main shaft 1, respectively. Each set of main support structures 2 includes 24 independently radially extendable and retractable adjustable support units 3 evenly distributed along the circumference of the main shaft 1. The 24 adjustable support units 3 are evenly arranged at a 15° angle to form a high-density continuous circular support surface.

[0022] The adjusting support unit 3 includes a fixed sleeve 31 and a telescopic top rod 32. One end of the fixed sleeve 31 is welded and fixed to the main shaft 1, and the other end is slidably sleeved with the telescopic top rod 32. The telescopic top rod 32 can be hydraulically driven or electrically driven. The extended end of the telescopic top rod 32 is bolted to an arc-shaped top support plate. The arc-shaped top support plate is made of steel plate with a thickness of 10-15mm, and its curvature perfectly matches the inner wall curvature of the steel plate lining 6, which can effectively increase the contact area with the steel plate and avoid local depressions during the jacking process.

[0023] The walking system is located at the lower end of the main shaft 1, and includes two sets of telescopic support roller units 4 and two sets of fixed support roller units 5 arranged alternately along the axial direction of the main shaft 1. In this embodiment, the arrangement sequence of the walking system from the front end to the rear end is as follows: fixed support roller unit 5, telescopic support roller unit 4, fixed support roller unit 5, telescopic support roller unit 4.

[0024] The telescopic support roller unit 4 includes a first roller frame 41, a telescopic actuator 42, and a first traveling roller 43. The first roller frame 41 includes symmetrically arranged first oblique support rods 411 and first transverse support rods 412. The axis of the first transverse support rod 412 is perpendicular to the axis of the main shaft 1 and lies in a horizontal plane. The upper ends of the two first oblique support rods 411 are welded and fixed to the outer surface of the main shaft 1, and the lower ends are welded and fixed to both ends of the first transverse support rod 412, forming a stable triangular support structure. The telescopic actuator 42 is a hydraulic cylinder, vertically fixed to the lower surfaces of both ends of the first transverse support rod 412, and its telescopic end is fixed downwards to the first traveling roller 43 via bolts. The first traveling roller 43 is a polyurethane-coated roller, which has good wear resistance and shock absorption performance.

[0025] The fixed support roller unit 5 includes a second roller frame 51, a fixed support rod 52, and a second traveling roller 53. The second roller frame 51 is structurally identical to the first roller frame 41, including a second oblique support rod 511 and a second transverse support rod 512. The fixed support rod 52 is made of seamless steel pipe and is vertically welded to the lower surfaces of both ends of the second transverse support rod 512. Its lower end is fixedly connected to the second traveling roller 53 by bolts. The second traveling roller 53 has the same specifications as the first traveling roller 43.

[0026] The maximum extension length of the telescopic actuator 42 is greater than the length of the fixed support rod 52, which can adapt to the inner wall support requirements of transport trolleys 7 of different heights and steel plate liners 6 of different diameters.

[0027] A method for preventing deformation of the inner lining thin-walled steel plate of an artificial energy storage chamber, specifically including the following steps: S1. Multiple prefabricated steel plates are transported to the construction site, assembled and welded on an assembly trolley to form a standard circular segment. After the welds pass non-destructive testing, the circular steel plate segment is hoisted onto a special transport trolley 7 using a gantry crane. Simultaneously, all the adjusting support units 3 of the support structure are retracted to their shortest state, and the support structure is pushed to the outer edge of one end of the circular steel plate segment using traction equipment, ready to enter the interior of the steel plate.

[0028] S2. Measure the center axis of the support structure and the center axis of the steel plate annular segment using a level and a plumb line, and adjust the extension length of the telescopic actuator 42 of the telescopic support roller unit 4 so that the center axis of the support structure and the center axis of the steel plate annular segment are completely coincident in the horizontal and vertical directions.

[0029] Slowly push the front end of the support structure into the steel plate annular segment, so that the second traveling roller 53 of the fixed support roller unit 5 at the front end fits against the bottom of the inner wall of the steel plate annular segment. If the traveling height is mismatched due to differences in the height of the transport trolley or the diameter of the steel plate, continue pushing the support structure so that the telescopic support roller unit 4 located behind the front fixed support roller unit 5 extends into the steel plate annular segment. Adjust the extension length of the telescopic actuator 42 so that the first traveling roller 43 fits against the bottom of the inner wall of the steel plate annular segment, thus completing the traveling height adaptation.

[0030] S3. Continue to slowly push the support structure. After the first set of fixed support roller units 5 has completely entered the steel plate annular section and its second traveling roller 53 is stably attached to the bottom of the inner wall, retract the first set of telescopic support roller units 4 located behind it, so that the first traveling roller 43 is disengaged from the inner wall of the steel plate.

[0031] Continue pushing the support structure until the second set of fixed support roller units 5 are fully inside the steel plate annular section and its second traveling roller 53 is stably attached to the bottom of the inner wall. Then, retract the second set of telescopic support roller units 4 located behind it. Continue pushing the support structure until it reaches the preset support position inside the steel plate annular section.

[0032] S4. Start the adjusting support unit 3 on each group of main support structures 2 using a graded and phased synchronous start-up method: First stage: Simultaneously activate the 24 adjustable support units 3 on the front main support structure, so that the arc-shaped top support plate 33 slowly contacts the inner wall of the steel plate, and the single group of top support force is controlled at 2-4kN; Second stage: Simultaneously activate 24 adjustable support units 3 on the central main support structure, with the single-group top support force also controlled at 2-4kN; Level 3: Simultaneously activate 24 adjustable support units 3 on the main support structure at the rear end, with the single-group top support force also controlled at 2-4kN; Level 4: Synchronously activate all the adjustment support units 3 on the front main support structure again to increase the single-group top support force to 6-8kN; Level 5: Synchronously activate all the adjusting support units 3 on the central main support structure again to increase the single-group top support force to 6-8kN; Level 6: Synchronously activate all the adjustment support units 3 on the main support structure at the rear end again, and increase the single-group top support force to 6-8kN; Through the above-mentioned graded and phased synchronous jacking, the circular section of the steel plate is corrected to a standard circle, and the roundness error of the steel plate is measured at multiple points along the axial direction using a high-precision roundness meter.

[0033] S5. Using traction equipment, transport trolley 7, along with the corrected steel plate ring segment and its internal support structure, is transferred as a whole to the end of the steel plate segment that has already been poured in the previous ring. Fine-tune the extension length of the support unit 3 to ensure that the roundness and coaxiality of the steel plate segment to be spliced ​​are consistent with the completed steel plate segment, and control the gap between them to be 2-3mm.

[0034] The circumferential welding splicing is carried out by manual arc welding. After the welding is completed, non-destructive testing is carried out. After passing the test, the locking devices of all adjusting support units 3 are locked to prevent them from shrinking back during the concrete pouring process.

[0035] S6. Using the support structure as internal rigid support, pumped concrete is used to pour the backfill concrete between the steel plate annular section and the chamber rock wall. During the pouring process, a layered symmetrical pouring method is adopted to avoid excessive pressure on one side, which could cause deformation of the steel plate.

[0036] After the concrete reaches 100% of its design strength, all adjusting support units 3 are contracted sequentially to completely detach the arc-shaped top support plate 33 from the inner wall of the steel plate. Then, each set of telescopic support roller units 4 is extended sequentially, so that the first traveling roller 43 fits against the bottom of the inner wall of the steel plate. The entire support structure is then pushed out of the inner lining of the steel plate 6 by a traction device and transferred to the next section of the steel plate ring. The above steps are repeated for subsequent construction.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A deformation-resistant support structure for the inner lining of an artificial energy storage chamber using thin-walled steel plates, characterized in that: The system includes a main shaft, on the surface of which at least two sets of main support structures are arranged axially. Each set of main support structures includes multiple independently telescopic adjustment structures distributed circumferentially along the main shaft. The adjustment structures are used to extend and retract radially along the main shaft to support and adjust the roundness of the steel plate liner. A traveling system is provided at the lower end of the main shaft. The traveling system includes telescopic support roller structures and fixed support roller structures arranged at intervals. The telescopic support roller structures and the fixed support roller structures are respectively arranged at different axial positions of the main shaft to drive the support structure to move axially along the steel plate liner.

2. The anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to claim 1, characterized in that: The adjustment structure includes a fixed sleeve and a telescopic top rod. One end of the fixed sleeve is connected to the main shaft, and the other end is slidably connected to the telescopic top rod. The telescopic top rod is used to extend and retract radially along the main shaft to contact or disengage from the steel plate lining.

3. The anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to claim 2, characterized in that: The telescopic support roller structure includes a first roller frame assembly, a telescopic actuator, and a first traveling roller. The first roller frame assembly includes a first oblique support rod and a first transverse support rod. The axis of the first transverse support rod is perpendicular to the axis of the main shaft in the horizontal plane. The first oblique support rod is symmetrically arranged at both ends of the first transverse support rod, and both ends of the first oblique support rod are fixedly connected to the outer surface of the main shaft and the outer end of the first transverse support rod, respectively. The telescopic actuator is vertically fixed to the lower surface of both ends of the first transverse support rod, and its telescopic end is fixedly connected downward to the first traveling roller. The fixed support roller structure includes a second roller frame assembly, a fixed support rod, and a second traveling roller; the second roller frame assembly includes a second oblique support rod and a second transverse support rod, and the second roller frame assembly has the same structure as the first roller frame assembly; the fixed support rod is vertically fixed to the lower surface of both ends of the second transverse support rod, and its lower end is fixedly connected to the second traveling roller.

4. The anti-deformation support structure of the thin-walled steel plate lining of an artificial energy storage chamber according to claim 3, characterized in that: The telescopic actuator is a hydraulic cylinder or an electric push rod, and the extension length of the telescopic actuator is greater than the length of the fixed support rod, so as to adapt to the support requirements of the inner wall of the transport trolley and the steel plate lining at different heights.

5. A method for preventing deformation of the inner lining thin-walled steel plate of an artificial energy storage chamber, based on the support structure described in claim 4, characterized in that, Includes the following steps: S1. Assemble multiple steel plates into a complete ring on the assembly trolley, hoist it onto the transport trolley, adjust the extension distance of the main support structure, and push the support structure to the outer edge of the steel plate ring; S2. Adjust the telescopic actuator of the telescopic support roller structure so that the centerline of the support structure coincides with the centerline of the steel plate ring; push the front end of the support structure into the steel plate ring so that the second traveling roller of the front fixed support roller structure fits against the bottom of the inner wall of the steel plate ring; if the traveling height is not matched, extend the telescopic support roller unit located behind the front fixed support roller unit into the steel plate ring, and adjust the telescopic support roller structure to make the first traveling roller fit against the bottom of the inner wall of the steel plate ring, thus completing the adaptation; S3. Continue pushing the support structure. After the fixed support roller structure is completely inside the steel plate, retract the first set of telescopic support roller structure and continue pushing until the second set of fixed support roller structure contacts the inner wall of the steel plate. Then retract the second set of telescopic support roller structure and push the support structure to the preset position inside the steel plate. S4. Start the radial support rods on the main support structure in stages to simultaneously support the inner lining of the steel plate at multiple points and correct the steel plate to a standard circle. S5. Transfer the transport trolley together with the steel plate lining and support structure to the steel plate section that has been poured in the previous ring. Fine-tune the radial support rods to make the roundness of the two steel plate sections consistent. After the circumferential welding of the pipe segment splicing is completed, lock all radial support rods. S6. Concrete is poured behind the wall using the support structure as an internal rigid support. After the concrete has completely solidified, all radial support rods are contracted, and the support structure is pushed out of the steel plate lining as a whole for reuse in subsequent construction.

6. The method for preventing deformation of the inner lining thin-walled steel plate of an artificial energy storage chamber according to claim 5, characterized in that: In step S4, the radial support rod is started synchronously in stages to avoid excessive single-point support force causing local deformation of the steel plate.

7. The method for preventing deformation of the inner lining thin-walled steel plate of an artificial energy storage chamber according to claim 5, characterized in that: In step S3, the retraction sequence of the telescopic support roller structure is as follows: first, the front telescopic support roller structure is retracted along the pushing direction, and then the rear telescopic support roller structure is retracted.

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