A slipform device for concrete construction on steep slopes

Abstract

This application relates to a slipform device for constructing concrete sloping slopes on steep slopes. The slipform device includes a top anchor frame: fixed to the slope walkway via anchor piles; a traction steel strand: one end fixedly connected to the top anchor frame, and the other end connected to the formwork; a track: fixedly installed on the slope; a through-hole jack: fixedly installed on the formwork back frame, with the traction steel strand passing through the hollow hole of the through-hole jack and connected to a hydraulic pump station via a high-pressure oil pipe; an anti-buoyancy block: connected to the formwork back frame and slidably connected to the track; and a finishing platform: connected to the I-beams of the formwork back frame by welding. This device reduces the input of materials and personnel, effectively reducing construction safety risks; it increases the construction speed of the sloping concrete, saves construction time, and greatly reduces construction costs; the addition of a finishing platform improves the appearance quality of the concrete.

Description

Technical Field

[0001] This application relates to the field of water conservancy and hydropower construction technology, and in particular to a slipform device for concrete construction on steep slopes. Background Technology

[0002] The inlet / outlet slopes of pumped storage power stations need to be protected with concrete in areas of fluctuating water levels. This measure provides a comprehensive protection measure with high strength, high durability, erosion resistance, impermeability, and freeze-thaw resistance, in response to the effects of high-speed water flow scouring, wet-dry / freeze-thaw cycles, and seepage erosion.

[0003] Referring to the inlet and outlet designs of multiple pumped storage power stations, the slope design of the water level fluctuation zone all exhibits steep slopes, high single-stage slope heights, and the presence of slope-attaching concrete. The traditional method used by construction units for pouring the slope-attaching concrete involves erecting scaffolding platforms on the slope. This method has significant drawbacks: Long construction period: The process of erecting and dismantling scaffolding is complicated, and the formwork can only be removed after the concrete reaches the design strength, which greatly takes up construction time; High safety risks: In steep slope environments, scaffolding erection and dismantling operations are difficult, and there are significant safety hazards for workers working at heights. Poor appearance quality: In traditional construction, it is difficult to remove air bubbles in concrete, which easily leads to appearance defects such as uneven surface and honeycomb pitting. High cost: It requires a large investment in scaffolding, ordinary steel formwork and other turnover materials, as well as a large number of scaffolders, steelworkers and other workers, resulting in high labor and material costs.

[0004] In view of the shortcomings of the traditional construction methods, there is an urgent need to design a construction device for steep slope lining concrete that is convenient to construct, safe, low in cost, and can guarantee the quality of concrete. Utility Model Content

[0005] To address or partially address the problems existing in related technologies, this application provides a slipform device for concrete construction on steep slopes, which can overcome the shortcomings of existing technologies and is a construction device that is convenient to construct, reduces personnel input, and is highly safe.

[0006] This application provides a slipform device for concrete construction on steep slopes, comprising: Top anchor frame 1: It is fixed to the slope walkway by anchor piles; Traction steel strand 2: One end is fixedly connected to the top anchor frame 1, and the other end is connected to the mold body 6; Track 3: Fixedly installed on the slope; Hollow jack 4: Fixedly installed on the back frame of the mold body 6, the traction steel strand 2 passes through the hollow hole of the hollow jack 4 and is connected to the hydraulic pump station 7 through the high pressure oil pipe; Anti-buoyancy block 5: connected to the back frame of the mold body 6 and slidably connected to the track 3; Surface finishing platform 8: It is connected to the I-beam of the back frame of the mold body 6 by welding.

[0007] Optionally, in some embodiments, a semi-circular ring fastener is provided on the outer side of the mold body 6, and the traction steel strand 2 is fixedly connected to the mold body 6 through the semi-circular ring fastener.

[0008] Optionally, in some schemes, the track 3 is a customized rectangular tube with a screw 31 connected to it. The two ends of the screw 31 pass through the customized rectangular tube and are fixedly installed with angle steel 32 by fastening nuts. The anti-buoyancy block 5 is slidably set with the angle steel 32. The track 3 is evenly provided with mounting holes along its length. The mounting holes are threaded with climbing cones 34. The other end of the climbing cones 34 is welded to the slope anchor 33 pre-set on the slope.

[0009] Optionally, in some schemes, the anti-buoyancy blocks 5 are symmetrically arranged on the left and right sides of the track 3, are welded from steel plates 53, are fixed by buttresses 52, and have wheel hubs 51 arranged side by side on one side of the long steel plate end, with the wheel hubs 51 in contact with the track angle steel 32.

[0010] Optionally, in some embodiments, a conical sleeve is provided at the end where the climbing cone 34 connects to the slope anchor 33.

[0011] The technical solution provided in this application may include the following beneficial effects: Improved connection stability: Each component adopts a multiple connection method of "welding + bolts + anchors", and key nodes are reinforced to ensure that the device does not loosen or shift in steep slopes (slope ≥ 60°), improving construction safety by more than 60%. Optimized transmission efficiency: The high-pressure oil pipe connection between the through-hole jack and the hydraulic pump station, and the rolling friction connection between the anti-buoyancy block and the track, reduce power loss. The movement speed of the formwork can be controlled at 0.5-1m / h, and the construction efficiency is improved by 50% compared with the traditional solution. Precise quality control: The guiding constraint of the traction steel strand and the vertical anti-buoyancy effect of the anti-buoyancy block ensure that the verticality deviation during the casting of the formwork is ≤3‰ and the flatness of the concrete surface is ≤5mm / 2m, solving the problem of appearance defects in traditional construction. Enhanced ease of assembly and disassembly: The bolted connection between the track and the climbing cone, and the wedge-shaped anchor connection of the traction steel strand, shorten the assembly and disassembly time of the device by 70% compared to the scaffolding solution. Furthermore, components such as the track and jacks can be recycled, reducing material costs by 30%.

[0012] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0013] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0014] Figure 1 This is a schematic diagram of the structure of the slipform device for high and steep slope concrete construction shown in the embodiments of this application; Figure 2 This is a side view of the slipform device for high and steep slope concrete construction shown in the embodiments of this application; Figure 3 This is a schematic diagram illustrating the relationship between the anti-buoyancy block and the track structure in an embodiment of this application; Figure 4 This is a schematic diagram of the track installation structure shown in an embodiment of this application.

[0015] Figure label: 1-Top anchor frame, 2-Traction steel strand, 3-Rail, 4-Through-core jack, 5-Anti-buoyancy block, 6-Mold body, 7-Hydraulic pump station, 8-Surface finishing platform, 31-Screw rod, 32-Angle steel, 33-Slope anchor rod, 34-Conical sleeve, 51-Wheel hub, 52-Buttress, 53-Steel plate. Detailed Implementation

[0016] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0017] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0018] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0019] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances.

[0020] To address the aforementioned issues, this application provides a slipform construction device for high and steep slope concrete, which overcomes the shortcomings of existing technologies and offers convenient construction, reduced personnel input, and high safety.

[0021] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0022] See Figure 1-2 The aforementioned slipform device for high and steep slope concrete construction includes: Top anchor frame 1: It is fixed to the slope walkway by anchor piles; Traction steel strand 2: One end is fixedly connected to the top anchor frame 1, and the other end is connected to the mold body 6; Track 3: Fixedly installed on the slope; Hollow jack 4: Fixedly installed on the back frame of the mold body 6, the traction steel strand 2 passes through the hollow hole of the hollow jack 4 and is connected to the hydraulic pump station 7 through the high pressure oil pipe; Anti-buoyancy block 5: connected to the back frame of the mold body 6 and slidably connected to the track 3; Surface finishing platform 8: It is connected to the I-beam of the back frame of the mold body 6 by welding.

[0023] Specifically, during construction, the top anchor frame 1 is first installed and fixed, then the track 3 is laid and fixed, followed by the installation of anti-buoyancy block 5, formwork 6, through-hole jack 4, hydraulic pump station 7 and finishing platform 8, and the connection of traction steel strand 2; the hydraulic pump station 7 is started to control the through-hole jack 4 to move the formwork 6, and the steel reinforcement binding and concrete pouring are carried out simultaneously. After pouring, the finishing work is carried out through the finishing platform 8; after the completion of a single section of construction, the track 3 and other components are disassembled and recycled to the next construction section.

[0024] The top anchor frame 1 serves as the fixed foundation for the entire device. One end of it is connected to the slope walkway via a dual fixing method of "anchor pile welding + additional anchor rod anchoring". First, the bottom of the top anchor frame 1 is fully welded to the pre-installed anchor piles on the walkway (the weld height is not less than the thickness of the H-beam web). Then, two anchor rods with a diameter ≥25mm are symmetrically installed at both ends of the top anchor frame 1, with the anchor rods penetrating the walkway rock mass to a depth of not less than 1.5m. The top anchor frame 1 is then fixed by tightening nuts. One end of the traction steel strand 2 is connected to the pre-installed anchor ring on the top of the top anchor frame 1 via a "wedge-shaped anchor". The wedge-shaped block of the anchor tightly engages with the traction steel strand 2, ensuring stable tension transmission and eliminating the risk of slippage. The top anchor frame 1 withstands the horizontal and vertical tension transmitted by the traction steel strand 2 through its own structural strength, providing a fixed support point for the traction steel strand 2 and preventing the formwork from tilting due to force displacement of the traction steel strand 2.

[0025] Two sets of 65t through-hole jacks 4 (hollow cylindrical structure, inner diameter ≥18mm) are fixed to the I-beams of the mold body 6 back frame via "flange brackets". The flange brackets are bolted to the jack base (M20 bolts, 4 sets). The other end of the bracket is fully welded to the I-beams of the mold body 6 (weld height 10mm). The hollow hole of the through-hole jack 4 is aligned with the central axis of the mold body 6 back frame to ensure that the force direction of the through-hole jack 4 is consistent with the movement direction of the mold body 6.

[0026] The hydraulic pump station 7 is connected to the through-hole jack 4 via high-pressure oil pipes and quick couplings. Each through-hole jack 4 is equipped with two high-pressure oil pipes (10mm inner diameter, working pressure ≥31.5MPa), which are connected to the "oil inlet" and "oil return" of the through-hole jack 4, respectively. Quick couplings (ISO 7241-1 standard) are installed at both ends of the oil pipes, and O-ring seals are used at the joints to prevent hydraulic oil leakage. The control panel of the hydraulic pump station 7 is equipped with an "independent control valve" for each through-hole jack 4, which can adjust the extension and retraction speed of the through-hole jack 4 to achieve smooth movement of the mold body 6. When the hydraulic pump station 7 supplies hydraulic oil to the through-hole jack 4, the piston inside the through-hole jack 4 moves under the pressure of the hydraulic oil. Since the through-hole jack 4 and the mold body 6 are connected as one unit, the movement of the piston drives the mold body 6 to move synchronously. During the movement, the mold body 6 slides along the pre-installed track 3. The climbing cone 34 is set on the slope and connected to the slope anchor 33, providing stable guidance and support for the movement of the formwork 6, so that the formwork 6 can move on the slope in a predetermined direction and trajectory, realizing the continuous construction of the slope-fitting concrete.

[0027] The supporting structure (I-beam, model I20a) of the finishing platform 8 is connected to the I-beam of the back frame of the mold body 6 by welding and stiffening plate reinforcement. The upper support beam of the platform is welded to the top I-beam of the back frame of the mold body 6 (weld length 200mm, spacing 500mm), and the lower support beam is welded to the middle I-beam of the back frame of the mold body 6. At the same time, triangular stiffening plates (10mm thick) are welded at the welding joints to enhance the shear strength of the joints. The platform scaffold boards (50mm thick anti-slip wooden boards) are fixed to the support beams by self-tapping screws and sheet metal strips with a screw spacing of 300mm. The strips cover the joints of the scaffold boards to prevent them from loosening.

[0028] Interlayer connection: The two plastering platforms are connected by a "ladder". The ladder is welded to the support beams of the upper and lower platforms. The ladder steps are spaced 300mm apart, and guardrails (1.2m high) are installed on both sides to ensure the safety of workers going up and down the platform.

[0029] In some embodiments, a semi-circular ring fastener is provided on the outer side of the mold body 6, and the traction steel strand 2 is fixedly connected to the mold body 6 through the semi-circular ring fastener.

[0030] Specifically, the other end of the traction steel strand 2 passes through the pre-set "semi-circular ring fastener" on the outside of the mold body 6 and is fixed by "double nut locking" - the ring fastener is welded to the I-beam of the mold body back frame (the weld length is not less than 100mm). After the traction steel strand 2 passes through the fastener, nuts are installed on both sides of the fastener and tightened to form a two-way constraint. At the same time, "guide pulleys" are installed on the back frame of the mold body 6 at the position corresponding to the traction steel strand 2. The traction steel strand 2 fits into the pulley groove to reduce the frictional wear between the steel strand and the mold body 6.

[0031] The traction steel strand 2 is a high-strength, low-relaxation steel strand with a diameter of 15.24mm and a tensile strength standard value of ≥1860MPa. The tension of each traction steel strand 2 is controlled within 70% of its tensile strength to avoid overload breakage.

[0032] See Figure 3-4 In some embodiments, the track 3 is a custom rectangular tube with screws 31 connected to it. Both ends of the screws 31 pass through the custom rectangular tube and are fixedly installed with angle steel 32 via fastening nuts. Anti-buoyancy blocks 5 are slidably fitted with the angle steel 32. The track 3 has evenly spaced mounting holes along its length, with threaded connections to climbing cones 34 within these holes. The other end of the climbing cone 34 is welded to a pre-installed slope anchor 33 on the slope. The anti-buoyancy blocks 5 are symmetrically arranged on the left and right sides of the track 3, welded from steel plates 53, and fixed with buttresses 52. A hub 51 is arranged side-by-side on one side of the long steel plate end, contacting the track angle steel 32. A conical sleeve is provided at the end of the climbing cone 34 that connects to the slope anchor 33.

[0033] Specifically, the track 3 body is a custom rectangular tube of 350mm×250mm. A set of mounting holes (two holes per set, 22mm diameter) is opened every 1.5m along the length of the tube. After the screw end of the climbing cone 34 passes through the mounting hole, it is fixed by "double nut tightening"—first, a flat washer and a spring washer are installed on the inside of the track 3, then the inner nut is tightened (torque controlled at 50-60 N·m). The outer nut of the track 3 fits against the tapered sleeve of the climbing cone 34. The large round end of the sleeve (80mm in diameter) is in close contact with the bottom surface of the track. The levelness of the track 3 is adjusted by the tapered surface of the sleeve to ensure that the straightness error of the track 3 along its entire length is ≤8mm. The other end of the climbing cone 34 screw is welded to the slope anchor 33 pre-installed on the slope. The slope anchor 33 is a threaded steel bar with a diameter of 28mm and an exposed length of ≥100mm. The climbing cone 34 screw and the slope anchor 33 are butt welded. The weld length is not less than 80mm. The weld needs to be non-destructive tested (UT test) to ensure that there are no defects such as slag inclusions and porosity, and to avoid the weld cracking under stress. When the length of the construction slope exceeds a single track (6m), the adjacent tracks 3 are spliced ​​by "flange + bolt". Flanges (16mm thick) are pre-installed at both ends of the track. Eight bolt holes with a diameter of 20mm are opened on the flanges. When splicing, the two flanges are fitted together and M18 high-strength bolts (8.8 grade) are inserted and tightened in a diagonal order. The bolt torque is controlled at 70-80N・m. The misalignment deviation at the splice joint is ≤2.5mm and the gap width is ≤1mm to prevent the formwork 6 from getting stuck when it moves.

[0034] The anti-buoyancy block 5 is connected to the back frame of the mold body 6 by "welding + bolt reinforcement" - the steel plate 53 of the anti-buoyancy block 5 (thickness 12mm) is welded to the web plate of the I-beam of the back frame of the mold body 6 (weld height 8mm, length 150mm), and at the same time, a set of M16 bolts (the bolts penetrate into the web plate of the I-beam ≥30mm) are installed on both sides of the weld, forming a "welding and bolt" connection structure to ensure that the anti-buoyancy block 5 moves synchronously with the mold body 6.

[0035] The anti-buoyancy block 5 has three wheel hubs 51 (100mm in diameter, made of wear-resistant cast iron) arranged side by side on one side. The wheel grooves fit into the flanges of the angle steel 32 (L50×5 angle steel) on both sides of the track 3. The wheel hubs 51 are connected to the steel plate 53 of the anti-buoyancy block 5 through "bearings + pins" - the pins are 20mm in diameter, pass through the bearings in the inner ring of the wheel hub 51, and are fixed at both ends by cotter pins to ensure that the wheel hubs 51 can rotate flexibly. The track angle steel 32 is connected to the track rectangular tube to form the "guide rail surface" for the movement of the anti-buoyancy block 5. The wheel hubs 51 roll along the flanges of the angle steel 32, which not only restrains the vertical displacement of the mold body 6 (prevents lifting) but also reduces the frictional resistance of the movement of the mold body 6.

[0036] Work logic: Power transmission path: Hydraulic pump station 7 → high pressure oil pipe → through-hole jack 4 → mold body 6 → anti-buoyancy block 5 rolls along track 3; Constraint control path: Top anchor 1 → Traction steel strand 2 → Mold body 6 (horizontal positioning); Track 3 → Anti-buoyancy block 5 → Mold body 6 (vertical anti-buoyancy); Collaborative work path: Simultaneous operation of formwork 6 movement → concrete pouring → finishing platform operation, realizing integrated construction of "pouring-finishing".

[0037] It should be noted that the through-hole jack 4 and the hydraulic pump station 7 are existing devices, and their structures are existing technologies, so they will not be described in detail here.

[0038] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0039] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0040] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A slipform device for concrete construction on steep slopes, characterized in that: The aforementioned slipform device for high and steep slope concrete construction includes: Top anchor frame (1): It is fixed to the slope walkway by anchor piles; Traction steel strand (2): One end is fixedly connected to the top anchor frame (1), and the other end is connected to the mold body (6); Track (3): Fixedly installed on the slope; Through-hole jack (4): Fixedly installed on the back frame of the mold body (6), the traction steel strand (2) passes through the hollow hole of the through-hole jack (4) and is connected to the hydraulic pump station (7) through the high-pressure oil pipe. Anti-buoyancy block (5): connected to the back frame of the module (6) and slidably connected to the track (3); The surface finishing platform (8) is connected to the I-beam of the back frame of the mold body (6) by welding.

2. The slipform device for high and steep slope concrete construction according to claim 1, characterized in that: The outer side of the mold body (6) is provided with a semi-circular ring fastener, and the traction steel strand (2) is fixedly connected to the mold body (6) through the semi-circular ring fastener.

3. The slipform device for high and steep slope concrete construction according to claim 1 or 2, characterized in that: The track (3) is a custom rectangular tube with a screw (31) connected to it. The two ends of the screw (31) pass through the custom rectangular tube and are fixedly installed with angle steel (32) by fastening nuts. The anti-buoyancy block (5) is slidably set with the angle steel (32). The track (3) is evenly provided with mounting holes along its length. The mounting holes are threaded with climbing cones (34). The other end of the climbing cones (34) is welded to the slope anchor rods (33) preset on the slope.

4. The slipform device for high and steep slope concrete construction according to claim 3, characterized in that: The anti-buoyancy blocks (5) are symmetrically arranged on the left and right sides of the track (3), and are welded from steel plates (53). The buttresses (52) are fixed, and the long steel plates are equipped with wheel hubs (51) on one side. The wheel hubs (51) are in contact with the track angle steel (32).

5. The slipform device for high and steep slope concrete construction according to claim 3, characterized in that: The end of the climbing cone (34) connected to the slope anchor (33) is provided with a conical sleeve.

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