Equipment and method for constructing roller-compacted concrete dam paving and forming transverse joints

Abstract

The present invention relates to the technical field of dam paving construction, and specifically proposes a roller-compacted concrete dam paving forming transverse seam construction equipment and method; the equipment includes a cutting plate for cutting transverse seams and an auxiliary positioning device for positioning the cutting plate during construction; the auxiliary positioning device includes: a base frame; a rectangular frame, which is vertically slidably installed on the base frame; a supporting positioning frame, including two positioning plates horizontally relatively slidably installed in the rectangular frame; two lower pressing frames, which are assembled on the two positioning plates in a one-to-one correspondence; a plurality of elastic support frames, which are connected between the base frame and the rectangular frame; and at least one limit frame, which is assembled on the base frame and is located below the rectangular frame; the cooperation between the auxiliary positioning device and the cutting plate in the equipment provided by the present invention greatly provides the stability and continuity of the pressed-in cutting guide, and also avoids the construction deformation of the cutting plate to the greatest extent, which can increase the reuse cycle of the cutting plate.

Description

Technical Field

[0001] The invention relates to the technical field of dam body paving construction, and specifically proposes equipment and a method for constructing roller-compacted concrete dam paving forming transverse joints. Background Art

[0002] The transverse joints of a dam body usually refer to the joints set perpendicular to the dam axis in hydraulic structures such as concrete gravity dams or arch dams. They are designed to adapt to the influence of factors such as temperature changes in the dam body, concrete shrinkage, and uneven foundation settlement, thereby preventing the dam body from cracking due to the stress generated by these factors. In my country's hydropower station dam projects, the construction of roller-compacted concrete for dams usually adopts a through-the-bin thin-layer paving method based on the thickness of the casting bin blocks and the size of the bin surface. Due to the use of through-the-bin roller-compacted paving, the expansion joints of the dam section need to be cut and formed. The cutting is usually done by "rolling first and then cutting". If a large-scale cutting machine is used, the cutting is affected by the on-site inclined layer paving, making it difficult to control the line shape and depth. If a hand-lifted vibrating cutting machine is used, although the construction is simple and flexible, it requires a certain amount of labor, the appearance quality of the seam is poor, and there are safety risks in construction. Based on the above reasons, in the existing technology, some people use welded cutting plates as templates, and during the paving process of RCC dam concrete, the cutting plates are directly inserted into the paved and positioned transverse joints. After the concrete is oxidized and formed, the cutting plates are removed one by one, thereby greatly improving the seam forming efficiency and cutting quality.

[0003] As a template, the cutting plate needs to be pressed into the concrete with the help of external force. Therefore, it also needs to be equipped with a corresponding positioning device for pressing and guiding positioning. However, the existing matching guiding and positioning devices are basically simple welded frame structures, which can only provide simple positioning and limiting functions, and have the following problems: (1) The existing guiding and positioning devices can generally only provide positioning for the cutting plate in the initial state, but cannot provide continuous and stable guiding effect during the process of continuously pressing the cutting plate into the concrete, which affects the cutting quality.

[0004] (2) When pressing in by external pressure, the downward pressure is generally applied directly to the slit board. Without the ability to provide a continuous and stable guiding effect, the slit board is locally stressed, which makes it more likely to cause deformation of the slit board. The slit board itself has template properties, which affects the subsequent reuse of the slit board. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a construction device and method for forming transverse joints in roller-compacted concrete dam paving, which are used to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a kind of equipment and method for constructing transverse seams in roller-compacted concrete dam paving, including a cutting plate for cutting transverse seams and an auxiliary positioning device for positioning the cutting plate during construction; the cutting plate is composed of a horizontal plate and a vertical plate, and has a T-shaped plate structure, and the vertical plate is used for cutting seams.

[0007] The auxiliary positioning device includes: a base frame; a rectangular frame, which is vertically slidably mounted on the base frame; a supporting positioning frame, including two positioning plates horizontally slidably mounted in the rectangular frame; the vertical plate is clamped left and right between the two positioning plates; two lower pressure frames, which are assembled on the two positioning plates one by one; the horizontal plate is clamped up and down between the lower pressure frames and the positioning plates; a plurality of elastic support frames are connected between the base frame and the rectangular frame for elastically supporting the rectangular frame; and at least one limit frame is assembled on the base frame and is located below the rectangular frame for limiting the descending height of the rectangular frame and indirectly controlling the slitting depth of the slitting plate; a locking member is provided on the limit frame, and when the rectangular frame descends to the position limited by the limit frame, the rectangular frame can be locked on the limit frame through the locking member.

[0008] Preferably, the positioning plate includes a supporting plate for supporting the horizontal plate, the lower end surface of the supporting plate is vertically connected to a side clamp along the long side close to the other positioning plate, and the side clamp is used to clamp and contact the vertical plate; the upper end surface of the supporting plate is vertically connected to a side plate along the long side away from the other positioning plate; the lower pressure frame is assembled on the side plate.

[0009] Preferably, the lower pressure frame includes a plurality of guide sleeves distributed and fixed on the side plates along the length direction, each guide sleeve is equipped with an elastic member providing vertical elastic support, and a lower pressure plate is horizontally fixed between all the elastic members, and the lower pressure plate is located above the support plate.

[0010] Preferably, the limit frame includes a limit support plate that is vertically adjusted and slidably installed on the base frame; a locking member is rotatably installed on the upper end of the limit support plate around a vertical axis, and a avoidance notch corresponding to avoiding the locking member when descending is opened on the rectangular frame, and a locking tongue is provided on the locking member. When the rectangular frame descends to fit with the limit support plate, the rectangular frame can be locked between the locking tongue and the limit support plate by rotating the locking member.

[0011] Preferably, the plurality of elastic support frames are equally divided into two columns, two slide grooves corresponding to the two columns of elastic support frames are horizontally fixed to the bottom end of the rectangular frame, and the plurality of elastic support frames in each column are distributed along the extension direction of the slide groove.

[0012] Preferably, the elastic support frame includes a fixed hinge seat fixed on the base frame, two connecting rods are hinged on the fixed hinge seat, the other ends of the two connecting rods are correspondingly hinged with sliding hinge seats, and the two sliding hinge seats are slidably installed in corresponding sliding grooves, and a tension spring is connected between the two connecting rods.

[0013] Preferably, the elastic member includes a guide pin vertically slidably installed in the guide sleeve, a connecting block is fixed to the top of the guide pin, a compression spring is provided on the guide pin, and both ends of the compression spring are respectively fixed to the bottom end of the connecting block and the inner end surface of the guide sleeve; the lower pressure plate is fixed on multiple connecting blocks.

[0014] Preferably, the lower pressure frame further includes a pressure plate horizontally fixed on the top ends of the plurality of connection blocks.

[0015] In addition, the present invention also provides a construction method for forming transverse joints in roller-compacted concrete dam paving, which specifically includes the following steps: S1, construction preparation: preparing construction materials, measuring and laying out, and then installing the template.

[0016] S2. Concrete paving: Lay concrete according to the paving thickness standard and ensure that the paving surface is flat.

[0017] S3. Initial compaction of concrete: Before the initial setting of the concrete, the paved concrete shall be compacted for the first time, and the initial compaction operation shall be performed at least twice.

[0018] S4. Positioning of transverse joints: After the initial compaction of concrete is completed, position the transverse joints immediately.

[0019] S5. Install the slit board: Position and install the slit board in the auxiliary positioning device so that the vertical board is clamped between the two positioning boards on the left and right, and the horizontal board is clamped between the lower pressure frame and the positioning board on the top and bottom, and the limit frame is adjusted to the limit height required for construction.

[0020] S6. Horizontal seam cutting: by synchronously pressing down the two pressing frames, the cutting plate is driven down so that the vertical plate is inserted into the positioned horizontal seam position until the rectangular frame is lowered to contact with the limit frame and the required insertion depth is reached.

[0021] S7. Disassembling the slitting plate: While keeping the locking member locked to the rectangular frame, disassemble and separate the slitting plate from the auxiliary positioning device, so that the slitting plate is temporarily retained in the transverse slit.

[0022] S8. Repeat slitting: Repeat steps S5, S6 and S7, and complete all slitting required by the design by using the auxiliary positioning device in conjunction with other slitting plates.

[0023] S9. Re-pressing and final pressing operation: re-pressing and final pressing construction operations are carried out on the concrete after the cutting is completed, and the concrete after final setting is cured.

[0024] S10. Remove the cutting plates: After the concrete meets the curing requirements, lift and remove all the cutting plates.

[0025] The above technical solution has the following advantages or beneficial effects: The present invention provides a roller-compacted concrete dam paving forming transverse seam construction equipment and method, which is composed of a cutting plate used for cutting transverse seams and an auxiliary positioning device that cooperates with the cutting plate for positioning and guiding. The auxiliary positioning device is provided with a positioning frame composed of a supporting positioning frame and two lower pressing frames, which can clamp and position the cutting plate left and right and up and down. The external downward pressure can directly act between the two lower pressing frames, so that it is indirectly pressed on the cutting plate, avoiding direct contact between the downward pressure and the cutting plate, and through the lower The pressing plate optimizes the distribution of pressure on the slitting plate and avoids local concentration of pressure; during the downward pressing process, the positioning frame drives the slitting plate to cut into the transverse seam position synchronously and continuously while maintaining the stable clamping and positioning of the slitting plate, and the auxiliary elastic support of the two rows of elastic support frames provides a downward pressure buffer, ensuring the stability of the downward pressure cutting; in summary, the cooperation between the auxiliary positioning device and the slitting plate in the equipment provided by the present invention greatly provides the stability and continuity of the pressed-in slitting guide, and also avoids the construction deformation of the slitting plate to the greatest extent, which can increase the reuse cycle of the slitting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention and its features, configurations and advantages will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings, in which like reference numerals indicate like parts throughout the drawings, which are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of a roller-compacted concrete dam paving and forming transverse joint construction equipment and method provided by the present invention.

[0028] Figure 2 It is a top view of a roller-compacted concrete dam paving and forming transverse joint construction equipment and method provided by the present invention.

[0029] Figure 3 It is a cross-sectional view taken along line AA in the figure.

[0030] Figure 4 It is a side view of a construction device and method for forming transverse joints in roller-compacted concrete dam paving provided by the present invention.

[0031] Figure 5 This is a three-dimensional structural diagram of the equipment and method for constructing transverse joints in roller-compacted concrete dam paving provided by the present invention, excluding the bottom frame and the limit frame.

[0032] Figure 6 It is a three-dimensional structural diagram of a rectangular frame.

[0033] Figure 7 It is a three-dimensional structural diagram of the positioning plate.

[0034] Figure 8 It is a three-dimensional structural diagram of the lower pressure frame.

[0035] Figure 9 It is a three-dimensional structural diagram of the slit board.

[0036] Figure 10 The present invention provides a process flow chart of a roller-compacted concrete dam paving and forming transverse joint construction method.

[0037] In the figure: 1. Base frame; 11. Bottom frame; 12. Guide column; 2. Rectangular frame; 21. Slide groove; 22. Avoidance gap; 3. Support and positioning frame; 31. Positioning plate; 311. Support plate; 312. Side splint; 313. Side plate; 32. Guide rod; 33. Bidirectional screw; 4. Lower pressure frame; 41. Guide sleeve; 42. Elastic member; 421. Guide pin; 422. Connecting block; 423. Compression spring; 43. Lower pressure plate; 44. Pressure plate; 5. Elastic support frame; 51. Fixed hinge seat; 52. Connecting rod; 53. Sliding hinge seat; 54. Tension spring; 6. Limiting frame; 61. Limiting support plate; 62. Screw; 63. Locking member; 631. Lock tongue; 7. Slit plate; 71. Horizontal plate; 72. Vertical plate. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 9As shown, a roller-compacted concrete dam paving forming transverse seam construction equipment and method, including a cutting plate 7 for cutting transverse seams and an auxiliary positioning device for positioning the cutting plate 7 during construction; the cutting plate 7 is composed of a horizontal plate 71 and a vertical plate 72 welded vertically, forming a T-shaped plate structure, and the vertical plate 72 is used for cutting seams; the auxiliary positioning device includes a base frame 1 that can be placed on the paving surface of the dam body; the base frame 1 includes a rectangular bottom frame 11, on which four rectangularly distributed guide posts 12 are vertically welded; a rectangular frame 2 is slidably mounted on the four guide posts 12, and the bottom end of the rectangular frame 2 is welded with two corresponding adjacent guide posts. The slide grooves 21 are arranged at the two long side positions, and two rows of elastic support frames 5 are assembled on the bottom frame 11, and the two rows of elastic support frames 5 correspond to the two slide grooves 21 one by one. There are three elastic support frames 5 in each row, and the three elastic support frames 5 are evenly arranged and distributed along the extension direction of the corresponding slide grooves 21; the elastic support frame 5 includes a fixed hinge seat 51 welded to the bottom frame 11, and two connecting rods 52 are hinged on the fixed hinge seat 51. The other ends of the two connecting rods 52 are correspondingly hinged with sliding hinge seats 53, and the two sliding hinge seats 53 are slidably installed in the corresponding slide grooves 21, and a tension spring 54 is connected between the two connecting rods 52.

[0041] like Figure 1 、 Figure 3 、 Figure 5 、 Figure 7 and Figure 9 As shown, the rectangular frame 2 is equipped with a supporting positioning frame 3 for positioning the slit plate 7 during construction. The supporting positioning frame 3 includes two positioning plates 31 that are horizontally and relatively slidably installed in the frame of the rectangular frame 2; the positioning plate 31 includes a supporting plate 311 for supporting the horizontal plate 71, and the lower end surface of the supporting plate 311 is vertically connected to a side clamping plate 312 along the long side close to the other positioning plate 31, and the side clamping plate 312 is used to clamp and contact the vertical plate 72; the upper end surface of the supporting plate 311 is vertically connected to a side plate 313 along the long side away from the other positioning plate 31; the supporting plate 311, the side clamping plate 312 and the side plate 313 are integrally processed and formed; the two The side plates 313 of each positioning plate 31 are welded with multiple guide rods 32 that are evenly distributed along the length of the side plates 313 and horizontally slidably mounted on the rectangular frame 2; a bidirectional screw 33 is also mounted on the rectangular frame 2 for horizontal rotation through a bearing, and the side plates 313 of the two positioning plates 31 are threadedly connected to the two threaded sections of the bidirectional screw 33 one by one; under the guidance of the guide rod 32, the relative spacing between the two positioning plates 31 can be adjusted by rotating the bidirectional screw 33. It should be added that when the spacing between the two positioning plates 31 is continuously adjusted to increase, the spacing between the two side clamping plates 312 can be greater than the width of the horizontal plate 71.

[0042] like Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 9 As shown, the side plates 313 of the two positioning plates 31 are respectively equipped with a lower pressure frame 4, and the two lower pressure frames 4 are arranged horizontally symmetrically; the lower pressure frame 4 includes a plurality of guide sleeves 41 uniformly distributed and welded on the side plates 313 along the length direction, and the guide sleeve 41 is located on the plate surface of the side plate 313 facing away from the other positioning plate 31; each guide sleeve 41 is equipped with an elastic member 42 that provides vertical elastic support, and the elastic member 42 includes a guide pin 421 vertically slidably installed in the guide sleeve 41, and a connecting block 422 is welded to the top of the guide pin 421, and a compression spring 423 is sleeved on the guide pin 421, and the two ends of the compression spring 423 are respectively welded to the bottom end of the connecting block 422 and the inner end surface of the guide sleeve 41; the bottom ends of the multiple connecting blocks 422 are connected in a horizontal direction. The lower pressure plate 43 is welded flatly. The lower pressure plate 43 is located above the supporting plate 311. When the compression spring 423 is not subjected to external force, the gap between the lower pressure plate 43 and the supporting plate 311 is smaller than the thickness of the horizontal plate 71. The lower pressure plate 43 and the supporting plate 311 cooperate to clamp the horizontal plate 71 up and down. During the clamping operation, in order to facilitate the horizontal plate 71 to enter the gap between the lower pressure plate 43 and the supporting plate 311, the lower end surface of the lower pressure plate 43 is located at the long side away from the side plate 313 and is rounded. In addition, the lower pressure plate 43 is arranged close to the side plate 313. A partial overlapping surface is reserved on the supporting plate 311 between the lower pressure plate 43 and the side clamping plate 312 to facilitate the overlapping of the horizontal plate 71 when the slitting plate 7 is placed. The top of the multiple connecting blocks 422 is horizontally welded with a pressure plate 44; the gap between the pressure plates 44 in the two lower pressure frames 4 is larger than the gap between the two side clamping plates 312.

[0043] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 and Figure 9As shown, the bottom frame 11 is equipped with two limit frames 6 for jointly limiting the descending height of the rectangular frame 2 and indirectly controlling the slitting depth of the slitting plate 7; the two limit frames 6 are distributed between the two rows of elastic support frames 5, and the two limit frames 6 are assembled with the two guide columns 12; the limit frame 6 includes a limit support plate 61 slidably installed between the two guide columns 12, the limit support plate 61 is located below the rectangular frame 2 and is used to overlap and limit the rectangular frame 2, a screw 62 is installed on the bottom frame 11 for vertical rotation through a bearing, the limit support plate 61 is threadedly installed on the screw 62, the screw 62 can be rotated to adjust the limit height of the limit support plate 61, and a locking member 63 is installed on the upper end of the limit support plate 61 and the screw 62 for coaxial rotation; the rectangular frame 2 is provided with corresponding openings relative to the two limit frames 6 There is a U-shaped avoidance notch 22, which is located directly above the screw 62 and the locking piece 63. When the rectangular frame 2 descends, the avoidance notch 22 can avoid the screw 62 and the locking piece 63. The locking piece 63 is also provided with a locking tongue 631. After the locking tongue 631 passes through the avoidance notch 22 relatively, the locking piece 63 is rotated so that the locking tongue 631 can overlap the plate surface at the edge of the avoidance notch 22. The gap between the locking tongue 631 and the limiting support plate 61 is slightly larger than the thickness of the plate surface at the edge of the avoidance notch 22 on the rectangular frame 2. When the locking tongue 631 is in the overlapping state, the rectangular frame 2 reaches a limited height position, and the bottom end of the rectangular frame 2 contacts the upper end of the limiting support plate 61, and then the rectangular frame 2 is restricted between the locking tongue 631 and the limiting support plate 61 to achieve position locking.

[0044] like Figures 1-10 As shown, in addition, the present invention also provides a construction method for forming transverse joints in roller-compacted concrete dam paving, which specifically includes the following steps: S1, construction preparation: prepare construction materials, measure and lay out, and then install the template.

[0045] S2. Concrete paving: Concrete paving shall be carried out in accordance with the paving thickness standard and the paving surface shall be ensured to be flat; during the paving process, the paving thickness shall be checked to be no greater than 270mm.

[0046] S3. Initial compaction of concrete: Before the initial setting of the concrete, the paved concrete is compacted for the first time, and the initial compaction operation is performed at least twice; in this embodiment, the initial compaction can be performed twice during the specific construction.

[0047] S4. Positioning of transverse joints: After the initial compaction of concrete is completed, the transverse joints shall be positioned immediately. During construction, in order to ensure accurate positioning, laser instruments can be used to assist in marking and positioning on the concrete paving surface.

[0048] S5. Install the slitting plate 7: Position and install the slitting plate 7 in the auxiliary positioning device so that the vertical plate 72 is clamped left and right between the two positioning plates 31, and the horizontal plate 71 is clamped up and down between the lower pressure frame 4 and the positioning plate 31, and the limit frame 6 is adjusted to the limit height required for construction. It can be specifically carried out according to the following steps: S51. Pre-apply the release agent evenly on the lower end surface of the horizontal plate 71 of the slitting plate 7 and the entire vertical plate 72 to facilitate subsequent demoulding and separation from the concrete.

[0049] S52: With manual assistance, the slitting plate 7 can be hoisted between the two side clamping plates 312 using a small excavator, and the horizontal plate 71 can be placed flat on the two supporting plates 311. It should be noted that a lifting structure such as a lifting ring can be welded to the upper end surface of the horizontal plate 71 of the slitting plate 7 to facilitate lifting with the small press.

[0050] S53. By rotating the bidirectional screw 33, the two positioning plates 31 are moved toward each other, and the side ends of the long sides of the horizontal plate 71 are passively inserted into the gap between the lower pressure plate 43 and the supporting plate 311 on the same side. As the movement continues, the vertical plate 72 is clamped between the two side clamping plates 312 on the left and right, and the horizontal plate 71 is clamped between the lower pressure plate 43 and the supporting plate 311 from top to bottom, so that the slitting plate 7 is positioned and clamped as a whole in the positioning frame composed of the supporting positioning frame 3 and the two lower pressure frames 4. When the positioning frame descends as a whole, the slitting plate 7 is driven to descend synchronously.

[0051] S54. According to the required transverse seam cutting depth, the height of the limiting support plate 61 can be adjusted by the screw 62. During the adjustment, the adjustment heights of the two limiting support plates 61 are ensured to be consistent.

[0052] S55, by moving and adjusting the auxiliary positioning device, the cutting plate 7 is aligned with the position of the standard transverse seam to be cut.

[0053] The cam 7 is then moved downwards to allow the two support plates 44 to be moved downwards, and the two support plates 4 are then moved downwards to allow the cam 7 to be moved downwards, thereby ensuring that the cam 7 is not pulled out of the workpiece.

[0054] S7. Disassemble the slit plate 7: While keeping the locking piece 63 locked to the rectangular frame 2, rotate the bidirectional screw 33 to drive the two positioning plates 31 to move backwards until they move to a position where the two positioning plates 31 avoid the horizontal plate 71. Then, use a small excavator to lift the auxiliary positioning device, so that the slit plate 7 is disassembled and separated from the auxiliary positioning device, and the slit plate 7 is temporarily left in the transverse seam.

[0055] S8. Repeat slitting: Repeat steps S5, S6 and S7, and complete all the slitting required by the design by using the auxiliary positioning device in conjunction with other slitting plates 7.

[0056] S9. Re-compacting and final compacting operations: Before the concrete is finally set, the concrete with the cut joints is re-compacted and finally compacted, and the concrete after final setting is cured. Specifically, watering can be performed, and the watering curing continues until the next round of roller-compacted concrete is paved.

[0057] S10, removing the cutting plates 7: Through continuous watering and curing, the concrete gradually hardens. When the concrete reaches the strength standard requirement of 5 MPa, all the cutting plates 7 can be lifted and removed from the transverse joints one by one by a small excavator.

[0058] The present invention provides a roller-compacted concrete dam paving forming transverse seam construction equipment and method, which is composed of a cutting plate 7 used for cutting transverse seams and an auxiliary positioning device that cooperates with the cutting plate 7 for positioning and guiding during construction. The auxiliary positioning device is provided with a positioning frame composed of a supporting positioning frame 3 and two lower pressing frames 4, which can clamp and position the cutting plate 7 left and right and up and down. The external downward pressure can directly act between the two lower pressing frames 4, so that it is indirectly pressed on the cutting plate 7, avoiding direct contact between the downward pressure and the cutting plate 7, and optimizing the pressure in the lower pressing plate 43. The distribution on the slitting plate 7 avoids local concentration of pressure; during the downward pressing process, the positioning frame drives the slitting plate 7 to cut into the transverse seam position synchronously and continuously while maintaining the slitting plate 7 in a stable clamped and positioned state, and the auxiliary elastic support of the two rows of elastic support frames 5 provides a downward pressing buffer, ensuring the stability of the downward pressing and cutting; in summary, the cooperation between the auxiliary positioning device and the slitting plate 7 in the equipment provided by the present invention greatly provides the stability and continuity of the pressed-in slitting guide, and also avoids the construction deformation of the slitting plate 7 to the greatest extent, which can increase the reuse cycle of the slitting plate 7.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A roller-compacted concrete dam paving and forming transverse joint construction equipment, characterized in that: It includes a cutting plate for cutting transverse seams and an auxiliary positioning device for positioning the cutting plate during construction; the cutting plate is composed of a horizontal plate and a vertical plate, forming a T-shaped plate structure, and the vertical plate is used for cutting seams; The auxiliary positioning device comprises: Base frame; Rectangular frame, vertically slidably mounted on the base frame; The supporting positioning frame includes two positioning plates that are horizontally slidably mounted in a rectangular frame; the vertical plate is clamped between the two positioning plates; Two lower pressing frames are mounted on the two positioning plates in a one-to-one correspondence; the horizontal plate is clamped between the lower pressing frame and the positioning plates; A plurality of elastic support frames are connected between the base frame and the rectangular frame and are used to provide elastic support to the rectangular frame; And at least one limit frame is assembled on the base frame and located below the rectangular frame, used to limit the descending height of the rectangular frame and indirectly control the slitting depth of the slitting plate; the limit frame is provided with a locking piece, and when the rectangular frame descends to the position limited by the limit frame, the rectangular frame can be locked on the limit frame through the locking piece.

2. The equipment for forming transverse joints in roller-compacted concrete dam paving according to claim 1 is characterized by: The positioning plate includes a supporting plate for supporting the horizontal plate, the lower end surface of the supporting plate is vertically connected to a side clamp along the long side close to the other positioning plate, and the side clamp is used to clamp and contact the vertical plate; the upper end surface of the supporting plate is vertically connected to a side plate along the long side away from the other positioning plate; the lower pressure frame is assembled on the side plate.

3. The equipment for forming transverse joints in roller-compacted concrete dam paving according to claim 2, characterized in that: The lower pressure frame includes a plurality of guide sleeves distributed and fixed on the side plates along the length direction. Each guide sleeve is equipped with an elastic member providing vertical elastic support. A lower pressure plate is horizontally fixed between all the elastic members, and the lower pressure plate is located above the supporting plate.

4. The equipment for forming transverse joints in roller-compacted concrete dam paving according to claim 1 is characterized by: The limit frame includes a limit support plate that is vertically adjusted and slidably installed on the base frame; a locking piece is rotatably installed on the upper end of the limit support plate around a vertical axis, and a avoidance notch corresponding to the locking piece when descending is opened on the rectangular frame, and a locking tongue is provided on the locking piece. When the rectangular frame descends to fit with the limit support plate, the rectangular frame can be locked between the locking tongue and the limit support plate by rotating the locking piece.

5. The equipment for forming transverse joints in roller-compacted concrete dam paving according to claim 1 is characterized by: The multiple elastic support frames are equally divided into two columns. Two slide grooves corresponding to the two columns of elastic support frames are horizontally fixed at the bottom end of the rectangular frame. Multiple elastic support frames in each column are distributed along the extension direction of the slide grooves.

6. The equipment for forming transverse joints in roller-compacted concrete dam paving according to claim 5, characterized in that: The elastic support frame includes a fixed hinge seat fixed on the base frame, and two connecting rods are hinged on the fixed hinge seat. The other ends of the two connecting rods are correspondingly hinged with sliding hinge seats, and the two sliding hinge seats are slidably installed in corresponding sliding grooves, and a tension spring is connected between the two connecting rods.

7. The equipment for forming transverse joints in roller-compacted concrete dam paving according to claim 3 is characterized by: The elastic member includes a guide pin vertically slidably installed in the guide sleeve, a connecting block is fixed to the top of the guide pin, a compression spring is sleeved on the guide pin, and the two ends of the compression spring are respectively fixed to the bottom end of the connecting block and the inner end surface of the guide sleeve; the lower pressure plate is fixed on multiple connecting blocks.

8. The equipment for forming transverse joints in roller-compacted concrete dam paving according to claim 7, characterized in that: The lower pressure frame also includes a pressure plate horizontally fixed on the top ends of the plurality of connection blocks.

9. A method for forming transverse joints in the paving of a roller-compacted concrete dam, characterized by: The method of constructing a roller compacted concrete dam paving forming transverse joint using the roller compacted concrete dam paving forming transverse joint construction equipment according to any one of claims 1 to 8 comprises the following steps: S1. Construction preparation: prepare construction materials, measure and lay out the lines before installing the formwork; S2. Concrete paving: paving concrete according to the paving thickness standard and ensuring the paving surface is flat; S3. Initial compaction of concrete: Before the initial setting of the concrete, the paved concrete shall be compacted for the first time, and the initial compaction operation shall be performed at least twice; S4. Positioning of transverse joints: Positioning of transverse joints shall be carried out immediately after the initial compaction of concrete is completed; S5. Install the slitting plate: Position and install the slitting plate in the auxiliary positioning device so that the vertical plate is clamped between the two positioning plates on the left and right, and the horizontal plate is clamped between the lower pressure frame and the positioning plate on the top and bottom, and the limit frame is adjusted to the limit height required for construction; S6. Horizontal seam cutting: by synchronously pressing down the two lower pressing frames, the cutting plate is driven down, so that the vertical plate is inserted into the positioned horizontal seam position until the rectangular frame is lowered to contact the limit frame and the required insertion depth is reached; S7. Removing the slitting plate: While keeping the locking member locked to the rectangular frame, remove the slitting plate from the auxiliary positioning device so that the slitting plate is temporarily retained in the transverse slit; S8, repeat slitting: repeat steps S5, S6 and S7, and complete all the slitting required by the design by using the auxiliary positioning device in conjunction with other slitting plates; S9, re-pressing and final pressing operation: re-pressing and final pressing construction operations are carried out on the concrete after the cutting is completed, and curing treatment is carried out on the concrete after final setting; S10. Remove the cutting plates: After the concrete meets the curing requirements, lift and remove all the cutting plates.

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