Roller compacted concrete dam paving forming transverse joint construction equipment and method

Abstract

The invention relates to the technical field of dam body paving construction, in particular to roller compacted concrete dam paving forming transverse joint construction equipment and method. The equipment comprises a joint cutting plate for cutting a transverse joint and an auxiliary positioning device for performing construction positioning on the joint cutting plate, the auxiliary positioning device comprises a base frame; the rectangular frame is vertically mounted on the base frame in a sliding manner; the bearing positioning frame comprises two positioning plates which are horizontally and oppositely mounted in the rectangular frame in a sliding manner; the two lower pressing frames are assembled on the two positioning plates in a one-to-one correspondence manner; the elastic supporting frames are connected between the base frame and the rectangular frame; the at least one limiting frame is assembled on the base frame and is positioned below the rectangular frame; according to the equipment provided by the invention, the auxiliary positioning device is matched with the joint-cutting plate, so that the stability and continuity of pressing-in joint-cutting guiding are greatly improved, the construction deformation of the joint-cutting plate is also avoided to the greatest extent, and the reuse period of the joint-cutting plate can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of dam paving construction, and specifically provides a construction device and method for the transverse joint of a roller-compacted concrete dam during paving and forming. Background Art

[0002] The transverse joints of a dam generally refer to the joints arranged along the direction perpendicular to the dam axis in hydraulic structures such as concrete gravity dams or arch dams. In order to adapt to the influence of factors such as the temperature change of the dam body, the shrinkage of concrete, and the uneven settlement of the foundation, cracks caused by the stress generated by the above factors in the dam body are prevented. In the dam roller-compacted concrete construction of hydropower stations in China, the dam segment expansion joints need to be cut and formed according to the thickness of the pouring block and the size of the pouring surface. The cutting is usually carried out in the way of "rolling first and then cutting". If a large cutting machine is used, it is difficult to control the linear shape and depth during cutting due to the influence of the inclined layer paving on site. If a hand-held vibrating cutting machine is used, although the construction is simple and flexible, a certain amount of labor needs to be invested, the appearance quality of the formed joint is not good, and there are safety construction risks. For the above reasons, in the prior art, some use a cut-off plate formed by welding as a template, and during the concrete paving of the roller-compacted concrete dam, the cut-off plate is directly inserted into the position of the transverse joint that has been paved and positioned and marked. After the concrete is oxidized and formed, the cut-off plates are removed one by one, thus greatly improving the joint forming efficiency and cutting quality.

[0003] As a template, the cut-off plate needs to be pressed into the concrete with the help of external force. Therefore, a corresponding positioning device is also required for pressing and guiding positioning. However, the existing supporting guiding 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 positioning devices generally can only provide positioning for the cut-off plate in the initial state, but during the process of continuously pressing the cut-off plate into the concrete, they cannot provide continuous and stable guiding effects, which affects the cutting quality.

[0004] (2) When pressing in through external pressure, the downward pressure is generally directly applied to the cut-off plate. Without providing continuous and stable guiding effects, the cut-off plate is locally stressed, which is more likely to cause deformation of the cut-off plate. Since the cut-off plate itself has the property of a template, it affects the subsequent reuse of the cut-off plate. Summary of the Invention

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

[0006] To achieve the above object, the present invention adopts the following technical solutions: A construction equipment and method for transverse joints in the paving and forming of a roller-compacted concrete dam, including a cutting plate for cutting transverse joints and an auxiliary positioning device for construction positioning of the cutting plate; the cutting plate is composed of a horizontal plate and a vertical plate, presenting a T-shaped plate structure, and the vertical plate is used for cutting joints.

[0007] The auxiliary positioning device includes: a base frame; a rectangular frame vertically slidably installed on the base frame; a supporting positioning frame including two positioning plates slidably installed horizontally and oppositely within the frame of the rectangular frame; the vertical plate is clamped between the two positioning plates from left and right; two pressing frames respectively assembled on the two positioning plates; the horizontal plate is clamped between the pressing frame and the positioning plate from above and below; a plurality of elastic support frames connected between the base frame and the rectangular frame for elastically supporting the rectangular frame; and at least one limiting frame assembled on the base frame and located below the rectangular frame for limiting the descending height of the rectangular frame and indirectly controlling the cutting depth of the cutting plate; a locking member is provided on the limiting frame, and when the rectangular frame descends to the position defined by the limiting frame, the rectangular frame can be locked on the limiting frame through the locking member.

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

[0009] Preferably, the pressing frame includes a plurality of guide sleeves fixedly distributed along the length direction on the side plate, each guide sleeve is assembled with an elastic member providing vertical elastic support, and all the elastic members are horizontally fixed together with a lower pressing plate, and the lower pressing plate is located above the supporting plate.

[0010] Preferably, the limiting frame includes a limiting support plate vertically and slidably adjusted and installed on the base frame; the locking member is rotatably installed around the vertical axis at the upper end of the limiting support plate, an avoidance notch for avoiding the locking member during descent is provided on the rectangular frame, a locking tongue is provided on the locking member, and when the rectangular frame descends to fit with the limiting support plate, the rectangular frame can be locked between the locking tongue and the limiting support plate by rotating the locking member.

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

[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 respectively hinged with sliding hinge seats, and the two sliding hinge seats are slidably installed in the corresponding chutes, and a tension spring is connected between the two connecting rods.

[0013] Preferably, the elastic member includes a guide pin vertically and slidably installed in the guide sleeve. A connecting block is fixed to the top end of the guide pin. A compression spring is sleeved 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 face of the guide sleeve; the lower pressing plate is fixed to a plurality of connecting blocks.

[0014] Preferably, the lower pressing frame further includes a bearing plate horizontally fixed to the top ends of a plurality of connecting blocks.

[0015] In addition, the present invention also provides a construction method for transverse joints in the paving and forming of roller-compacted concrete dams, which specifically includes the following steps: S1. Construction preparation: Prepare construction materials, and install templates after measuring and setting out the lines.

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

[0017] S3. Initial compaction of concrete: Before the concrete starts to set, conduct the first compaction operation on the paved concrete, and the number of initial compaction operations is not less than two times.

[0018] S4. Transverse joint positioning: Immediately after the initial compaction of the concrete is completed, conduct the transverse joint position positioning.

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

[0020] S6. Transverse joint cutting: By synchronously pressing down two lower pressing frames, drive the cutting joint board to descend, so that the vertical board is inserted into the positioned transverse joint position until the rectangular frame descends to contact the limiting frame, reaching the required insertion depth.

[0021] S7. Dismantle the cutting joint board: While keeping the locking member locking the rectangular frame, disassemble and separate the cutting joint board from the auxiliary positioning device, so that the cutting joint board is temporarily left in the transverse joint.

[0022] S8. Repeat cutting: Repeat the operation steps S5, S6 and S7, and complete all the cutting required by the design through the auxiliary positioning device in cooperation with other cutting joint boards.

[0023] S9. Re-compaction and final compaction operations: Conduct re-compaction and final compaction construction operations on the concrete after cutting, and conduct curing treatment on the concrete after final setting.

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

[0025] The above technical solution has the following advantages or beneficial effects: The present invention provides a construction equipment and method for transverse joints in the paving and forming of roller compacted concrete dams, which consists of a cutting plate for transverse joint cutting and an auxiliary positioning device for construction cooperation and positioning guidance with the cutting plate. The auxiliary positioning device is provided with a positioning frame composed of a supporting positioning frame and two pressing frames, which can clamp and position the cutting plate left and right and up and down. The externally applied downward pressure can directly act between the two pressing frames, so that it is indirectly pressed on the cutting plate, avoiding direct contact between the downward pressure and the cutting plate, and optimizing the distribution of pressure on the cutting plate through the lower pressing plate, avoiding local concentration of pressure; during the downward pressing process, while maintaining a stable clamping and positioning state of the cutting plate, the positioning frame drives the cutting plate to continuously cut into the transverse joint position synchronously, and the auxiliary elastic support of the two rows of elastic support frames provides downward pressing buffering, ensuring the stability of downward pressing and cutting; in summary, the cooperation between the auxiliary positioning device and the cutting plate in the equipment provided by the present invention greatly improves the stability and continuity of the guiding for pressing into the cutting joint, and also maximally avoids the construction deformation of the cutting plate, and can improve the repeated use cycle of the cutting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, the present invention, its features, appearance and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings, and the drawings are not deliberately drawn to scale, with the focus on showing the gist of the present invention.

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

[0028] Figure 2 is a top view of a construction equipment and method for transverse joints in the paving and forming of roller compacted concrete dams provided by the present invention.

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

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

[0031] Figure 5 is a three-dimensional structural diagram of a construction equipment and method for transverse joints in the paving and forming of roller compacted concrete dams provided by the present invention without including the bottom frame and the limit frame.

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

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

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

[0035] Figure 9 It is a three-dimensional structure diagram of the slotted plate.

[0036] Figure 10 It is a process flow diagram of a construction method for the transverse joint of a roller compacted concrete dam provided by the present invention.

[0037] In the figure: 1. Base frame; 11. Bottom frame; 12. Guide post; 2. Rectangular frame; 21. Slide groove; 22. Avoidance notch; 3. Support and positioning frame; 31. Positioning plate; 311. Support plate; 312. Side clamping plate; 313. Side plate; 32. Guide rod; 33. Bidirectional lead screw; 4. Lower pressing frame; 41. Guide sleeve; 42. Elastic member; 421. Guide pin; 422. Connecting block; 423. Compression spring; 43. Lower pressing plate; 44. Bearing 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. Lead screw; 63. Locking member; 631. Lock tongue; 7. Slotted plate; 71. Horizontal plate; 72. Vertical plate. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] In order to enable those in the technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 9As shown in the figure, a construction equipment and method for transverse joints in the paving and forming of roller-compacted concrete dams includes a cutting plate 7 for transverse joint cutting 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 which are perpendicularly welded to form a T-shaped plate structure, and the vertical plate 72 is used for cutting the joint. The auxiliary positioning device includes a base frame 1 that can be placed on the dam paving surface. The base frame 1 includes a rectangular bottom frame 11, and four guide columns 12 distributed in a rectangle are vertically welded on the bottom frame 11. A rectangular frame 2 is slidably fitted on the four guide columns 12. Two chutes 21 are welded at the bottom end of the rectangular frame 2 and are correspondingly adjacent and distributed at two long side positions. Two columns of elastic support frames 5 are assembled on the bottom frame 11, and the two columns of elastic support frames 5 are correspondingly matched with the two chutes 21. Each column of elastic support frames 5 has a total of three, and the three elastic support frames 5 are evenly arranged along the extension direction of the corresponding chute 21. The elastic support frame 5 includes a fixed hinge seat 51 welded on the bottom frame 11. 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 chute 21. A tension spring 54 is connected between the two connecting rods 52.

[0041] As Figure 1 , Figure 3 , Figure 5 , Figure 7 and Figure 9 shown, a supporting and positioning frame 3 for positioning the cutting plate 7 during construction is assembled on the rectangular frame 2. The supporting and positioning frame 3 includes two positioning plates 31 that are horizontally and relatively slidably installed inside the frame of the rectangular frame 2. The positioning plate 31 includes a supporting plate 311 for supporting the horizontal plate 71. A side clamping plate 312 is perpendicularly connected to the lower end surface of the supporting plate 311 along the long side close to the other positioning plate 31, and the side clamping plate 312 is used for clamping and contacting the vertical plate 72. A side plate 313 is perpendicularly connected to the upper end surface of the supporting plate 311 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. A plurality of guide rods 32 are welded on the side plates 313 of the two positioning plates 31. The guide rods 32 are evenly distributed along the length direction of the side plates 313 and are horizontally slidably installed on the rectangular frame 2. A bidirectional lead screw 33 is also horizontally rotatably installed on the rectangular frame 2 through a bearing. The side plates 313 of the two positioning plates 31 are correspondingly threadedly connected to the two threaded sections of the bidirectional lead screw 33. Under the guidance of the guide rods 32, the relative distance between the two positioning plates 31 can be adjusted by rotating the bidirectional lead screw 33. It should be added that when continuously adjusting and increasing the distance between the two positioning plates 31, the distance between the two side clamping plates 312 can be greater than the width of the horizontal plate 71.

[0042] As Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 8 andFigure 9 As shown, on the side plates 313 of the two positioning plates 31, pressing frames 4 are correspondingly assembled, and the two pressing frames 4 are arranged horizontally symmetrically; the pressing frame 4 includes a plurality of guide sleeves 41 evenly distributed and welded on the side plate 313 along the length direction, and the guide sleeves 41 are located on the surface of the side plate 313 facing away from the other positioning plate 31; in each guide sleeve 41, an elastic member 42 providing vertical elastic support is assembled. The elastic member 42 includes a guide pin 421 vertically and slidably installed in the guide sleeve 41. A connecting block 422 is welded to the top end of the guide pin 421. 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 plurality of connecting blocks 422 are horizontally welded together to form a lower pressing plate 43. The lower pressing plate 43 is located above the supporting plate 311, and when the compression spring 423 is in an unloaded state, the gap between the lower pressing plate 43 and the supporting plate 311 is smaller than the thickness of the horizontal plate 71. The lower pressing plate 43 and the supporting plate 311 cooperate to clamp the horizontal plate 71 up and down together. During the clamping operation, in order to facilitate the horizontal plate 71 to enter the gap between the lower pressing plate 43 and the supporting plate 311, the lower end surface of the lower pressing plate 43 is rounded at the long side away from the side plate 313. In addition, the lower pressing plate 43 is arranged close to the side plate 313, and a partial overlapping surface is reserved on the supporting plate 311 between the lower pressing plate 43 and the side clamping plate 312 to facilitate the overlapping of the horizontal plate 71 when starting to place the slit plate 7. The top ends of the plurality of connecting blocks 422 are horizontally welded together to form a bearing plate 44; the gap between the bearing plates 44 in the two pressing frames 4 is larger than the gap between the two side clamping plates 312.

[0043] As Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 9 ​As shown in the figure, two limit brackets 6 are assembled on the bottom frame 11 shown. The two limit brackets 6 are used to jointly limit the descending height of the rectangular frame 2 and indirectly control the cutting depth of the cutting slot plate 7. The two limit brackets 6 are distributed between two columns of elastic support frames 5, and both of the two limit brackets 6 are assembled in cooperation with two guide posts 12. The limit bracket 6 includes a limit support plate 61 slidably installed between the two guide posts 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 lead screw 62 is vertically and rotatably installed on the bottom frame 11 through a bearing. The limit support plate 61 is installed in threaded cooperation with the lead screw 62. Rotating the lead screw 62 can adjust the limit height of the limit support plate 61. A locking member 63 is rotatably installed coaxially with the lead screw 62 at the upper end of the limit support plate 61. Opposite to the two limit brackets 6 on the rectangular frame 2, U-shaped avoidance notches 22 are correspondingly opened. The avoidance notches 22 are located directly above the lead screw 62 and the locking member 63. When the rectangular frame 2 descends, the avoidance notches 22 can avoid the lead screw 62 and the locking member 63. A locking tongue 631 is also provided on the locking member 63. After the locking tongue 631 relatively passes through the avoidance notch 22, by rotating the locking member 63, the locking tongue 631 can overlap on the plate surface at the edge of the avoidance notch 22. The gap between the locking tongue 631 and the limit support plate 61 is slightly larger than the plate thickness of the rectangular frame 2 at the edge of the avoidance notch 22. When the locking tongue 631 is in the overlapping state, the rectangular frame 2 reaches the limited height position. The bottom end of the rectangular frame 2 contacts the upper end of the limit support plate 61. Then, the rectangular frame 2 is restricted between the locking tongue 631 and the limit support plate 61 to realize the locking of the position.

[0044] As Figures 1 - 10 shown, in addition, the present invention also provides a construction method for the transverse joint of the roller compacted concrete dam during paving and forming, which specifically includes the following steps: S1. Construction preparation: Prepare construction materials, and install templates after measuring and setting out the lines.

[0045] S2. Concrete paving: Pave the concrete according to the paving thickness standard, and ensure that the paving surface is flat; during the paving process, the paving thickness should be detected to be no greater than 270 mm.

[0046] S3. Initial compaction of concrete: Before the concrete begins to set, conduct the first compaction operation on the paved concrete, and the number of initial compaction operations is not less than two times; in this embodiment, specifically during construction, two initial compaction operations can be carried out.

[0047] S4. Transverse joint positioning: Immediately conduct the transverse joint position positioning after the initial compaction of the concrete is completed; during construction, to ensure accurate positioning, laser instruments can be used for auxiliary marking and positioning on the concrete paving surface.

[0048] S5. Install the cutting slot plate 7: Position and install the cutting slot 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 pressing frame 4 and the positioning plate 31, and the limit frame 6 is adjusted to the required limit height for construction. The specific steps can be as follows: S51. Pre-uniformly apply a release agent on the lower end face of the horizontal plate 71 and the entire vertical plate 72 of the cutting slot plate 7 to facilitate subsequent demoulding separation from the concrete.

[0049] S52. With the assistance of manual operation, the cutting slot plate 7 can be lifted by a small excavator and placed between the two side clamping plates 312, and the horizontal plate 71 can be placed flat on the two supporting plates 311. It should be added that a lifting structure such as a lifting ring can be welded on the upper end face of the horizontal plate 71 of the cutting slot plate 7 to facilitate the lifting by a small press.

[0050] S53. By rotating the bidirectional lead screw 33, the two positioning plates 31 move closer to each other. The long side end position of the horizontal plate 71 is then passively inserted into the gap between the lower pressing plate 43 and the supporting plate 311 on the same side. As the movement continues, the vertical plate 72 is clamped left and right between the two side clamping plates 312, and the horizontal plate 71 is clamped up and down between the lower pressing plate 43 and the supporting plate 311, so that the cutting slot plate 7 is integrally positioned and clamped in the positioning frame composed of the supporting and positioning frame 3 and the two lower pressing frames 4. When the whole positioning frame descends, it drives the cutting slot plate 7 to descend synchronously.

[0051] S54. According to the required transverse joint cutting depth in the design, the height of the limit support plate 61 can be adjusted by the lead screw 62. During the adjustment, ensure that the adjustment heights of the two limit support plates 61 are the same.

[0052] S55. Move and adjust the auxiliary positioning device to align the cutting slot plate 7 with the marked position of the standard transverse joint to be cut.

[0053] S6. Transverse joint cutting: During actual construction, the cutting slot plate 7 is also driven by a small excavator to complete the cutting. Specifically, the bucket of the small excavator is centered and pressed down on the top of the two bearing plates 44, so that it is indirectly pressed on the horizontal plate 71 of the cutting slot plate 7 through the two lower pressing frames 4. Subsequently, the bucket is pressed down and moved at a constant speed. In the state where the supporting and positioning frame 3 and the two lower pressing frames 4 stably position and clamp the cutting slot plate 7, the whole moves down synchronously, driving the cutting slot plate 7 to descend, so that the vertical plate 72 is inserted into the positioned transverse joint position until the rectangular frame 2 descends to contact the limit frame 6 to reach the required insertion depth; while keeping the bucket pressed, manually rotate the two locking parts 63 to keep the rectangular frame 2 and the limit support plate 61 locked. Subsequently, remove the bucket. The purpose of locking is to prevent the cutting slot plate 7 from being pulled out upward from the transverse joint under the elastic force of the two rows of elastic support frames 5 after the bucket is removed.

[0054] S7. Demounting the cutting slot plate 7: While keeping the locking member 63 locking the rectangular frame 2, by rotating the bidirectional lead screw 33, drive the two positioning plates 31 to move away from each other until they move to positions where the two positioning plates 31 avoid the horizontal plate 71. Subsequently, use a small excavator to lift the auxiliary positioning device, so that the cutting slot plate 7 is disassembled and separated from the auxiliary positioning device, and the cutting slot plate 7 is temporarily left in the transverse joint.

[0055] S8. Repeating the cutting of slots: Repeat the operation steps S5, S6 and S7, and complete all the slots required by the design through the cooperation of the auxiliary positioning device and other cutting slot plates 7.

[0056] S9. Recompacting and final compaction operations: Before the concrete reaches final setting, perform recompacting and final compaction construction operations on the concrete with completed slot cutting, and perform curing treatment on the concrete after final setting; specifically, watering curing can be carried out, and the watering curing continues until it stops before the next round of roller compacted concrete paving.

[0057] S10. Removing the cutting slot plate 7: Through continuous watering curing, the concrete gradually hardens. When the concrete reaches the strength standard requirement of 5 Mpa, all the cutting slot plates 7 can be lifted out of the transverse joints one by one by a small excavator.

[0058] The present invention provides a construction equipment and method for the transverse joint of roller compacted concrete dam paving and forming, which consists of a cutting slot plate 7 used for cutting the transverse joint and an auxiliary positioning device for construction cooperation and positioning guidance with the cutting slot plate 7. In the auxiliary positioning device, a positioning frame is provided, which is composed of a supporting and positioning frame 3 and two pressing frames 4, and can clamp and position the cutting slot plate 7 left and right and up and down. The externally applied downward pressure can directly act between the two pressing frames 4, so that it is indirectly pressed on the cutting slot plate 7, avoiding direct contact between the downward pressure and the cutting slot plate 7, and optimizing the distribution of the pressure on the cutting slot plate 7 through the lower pressing plate 43, avoiding local concentration of the pressure; during the downward pressing process, while the positioning frame keeps the cutting slot plate 7 stably clamped and positioned, it drives the cutting slot plate 7 to continuously cut into the transverse joint position synchronously, 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 cutting slot plate 7 in the equipment provided by the present invention greatly improves the stability and continuity of the pressing-in cutting slot guidance, and also maximally avoids the construction deformation of the cutting slot plate 7, and can improve the repeated use cycle of the cutting slot plate 7.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the 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 thus should not be construed as a limitation to the present invention.

[0060] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "installed", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0061] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A construction equipment for transverse joints in the paving and forming of a roller-compacted concrete dam, characterized in that, It includes a cutting plate for transverse joint cutting and an auxiliary positioning device for construction positioning of the cutting plate; the cutting plate is composed of a horizontal plate and a vertical plate, presenting a T-shaped plate structure, and the vertical plate is used for cutting joints. The auxiliary positioning device includes: A base frame; A rectangular frame, vertically and slidably installed on the base frame; A supporting and positioning frame, including two positioning plates horizontally and relatively slidably installed inside the rectangular frame; the vertical plate is clamped between the two positioning plates from left and right; Two pressing frames, respectively assembled on the two positioning plates; the horizontal plate is clamped between the pressing frame and the positioning plate from above and below; A plurality of elastic supporting frames, connected between the base frame and the rectangular frame, for elastically supporting the rectangular frame; And at least one limiting frame, assembled on the base frame and located below the rectangular frame, for limiting the descending height of the rectangular frame and indirectly controlling the cutting depth of the cutting plate; a locking member is provided on the limiting frame, and when the rectangular frame descends to the position defined by the limiting frame, the rectangular frame can be locked on the limiting frame through the locking member.

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

3. A paving and forming transverse joint construction device for a roller-compacted concrete dam according to claim 2, characterized in that: The pressing frame includes a plurality of guide sleeves fixedly distributed along the length direction on the side plate, and an elastic member providing vertical elastic support is assembled in each guide sleeve, and a lower pressing plate is horizontally fixed among all the elastic members, and the lower pressing plate is located above the supporting plate.

4. A construction device for transverse joints in the paving and forming of a roller-compacted concrete dam according to claim 1, characterized in that: The limiting frame includes a limiting support plate vertically and slidably installed on the base frame; the locking member is rotatably installed around a vertical axis at the upper end of the limiting support plate, a avoiding notch for avoiding the locking member during descent is provided on the rectangular frame, a locking tongue is provided on the locking member, and when the rectangular frame descends to fit with the limiting support plate, the rectangular frame can be locked between the locking tongue and the limiting support plate by rotating the locking member.

5. A paving and forming transverse joint construction device for a roller compacted concrete dam according to claim 1, characterized in that: The plurality of elastic supporting frames are equally divided into two columns, two chutes corresponding to the two columns of elastic supporting frames are horizontally fixed at the bottom end of the rectangular frame, and the plurality of elastic supporting frames in each column are distributed along the extending direction of the chute.

6. A paving and forming transverse joint construction device for a roller-compacted concrete dam according to claim 5, characterized in that: The elastic supporting 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 respectively hinged with sliding hinge seats, and the two sliding hinge seats are slidably installed in the corresponding chutes, and a tension spring is connected between the two connecting rods.

7. A paving and forming transverse joint construction device for a roller compacted concrete dam according to claim 3, characterized in that: The elastic member includes a guide pin vertically and slidably installed in the guide sleeve, a connecting block is fixed at the top end of the guide pin, a compression spring is sleeved on the guide pin, and two ends of the compression spring are respectively fixed at the bottom end of the connecting block and the inner end surface of the guide sleeve; the lower pressing plate is fixed on the plurality of connecting blocks.

8. A paving and forming transverse joint construction device for a roller compacted concrete dam according to claim 7, characterized in that: The pressing frame further includes a bearing plate horizontally fixed at the top ends of the plurality of connecting blocks.

9. A construction method for transverse joints in the paving and forming of a roller-compacted concrete dam, characterized in that: Using a construction equipment for the transverse joint construction of the paving and forming of a roller compacted concrete dam as described in any one of claims 1-8 to construct the transverse joint of the paving and forming of a roller compacted concrete dam, the following steps are included: S1. Construction preparation: Prepare construction materials, and install templates after measuring and setting out the lines; S2. Concrete paving: Pave concrete according to the paving thickness standard, and ensure that the paving surface is flat; S3. Initial compaction of concrete: Before the concrete starts to set, conduct the first compaction operation on the paved concrete, and the number of initial compaction operations is not less than two times; S4. Transverse joint positioning: Immediately after the initial compaction of the concrete is completed, conduct the positioning of the transverse joint position; S5. Install the cut-off board: Position and install the cut-off board in the auxiliary positioning device, so that the vertical board is clamped between two positioning boards on the left and right, the horizontal board is clamped between the lower pressing frame and the positioning board from above and below, and the limit frame is adjusted to the required limit height for construction; S6. Transverse joint cutting: By synchronously pressing down the two lower pressing frames, drive the cut-off board to descend, so that the vertical board is inserted into the positioned transverse joint position until the rectangular frame descends to contact the limit frame, reaching the required insertion depth; S7. Dismantle the cut-off board: While keeping the locking part locking the rectangular frame, disassemble and separate the cut-off board from the auxiliary positioning device, so that the cut-off board is temporarily left in the transverse joint; S8. Repeat cutting: Repeat the operation steps S5, S6 and S7, and complete all the cuts required by the design through the auxiliary positioning device in cooperation with other cut-off boards; S9. Re-compaction and final compaction operations: Conduct re-compaction and final compaction construction operations on the concrete after cutting, and conduct curing treatment on the concrete after final setting; S10. Remove the cut-off board: After the concrete meets the curing requirements, lift and remove all the cut-off boards.

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