Dry period dam roller compacted concrete rapid construction device and using method

Abstract

This invention provides a rapid construction device and method for roller-compacted concrete (RCC) of dams during the dry season, comprising the following steps: S1, spreading RCC to a thickness of 50cm or more; S2, dividing the spread RCC into compaction strips; S3, compacting each compaction strip using two passes of static compaction, at least six passes of vibratory compaction, and two passes of static compaction, employing different compaction equipment for both static and vibratory compaction; these steps achieve rapid construction of RCC for dams. This invention provides a rapid construction device and method for RCC of dams during the dry season, improving construction efficiency while ensuring construction quality. Furthermore, by employing a non-reactive vibratory roller compaction scheme, the final vibratory compaction pass shortens the compaction time within the compaction chamber, reduces the number of passes, and further ensures the density of the RCC.

Description

Technical Field

[0001] This invention relates to the field of roller-compacted concrete dam construction, and in particular to a rapid construction device and method for roller-compacted concrete dams during the dry season. Background Technology

[0002] Historical hydrological and meteorological data show that the average annual temperature at the dam site is 23.5℃, with an extreme maximum of 41.6℃ and an extreme minimum of -3.1℃. The dam is an L-shaped structure with a large surface area for the roller-compacted concrete (RCC) pouring of the main dam body, resulting in rapid dam construction and a large volume of concrete. After river closure, the excavation of the foundation below the riverbed, the dam foundation cushion concrete, the foundation consolidation grouting, and the RCC pouring of the dam body must be completed between early December and the end of May of the following year, presenting a tight schedule and high construction intensity. Current RCC construction parameters are a single-layer paving thickness of 35cm, a compacted thickness of 30cm, and a 2-6-2 compaction sequence (2 passes of static compaction, 6 passes of vibratory compaction, and 2 passes of static compaction), resulting in a relative density of not less than 98% after compaction. Improving the efficiency of RCC pouring while ensuring construction quality remains a significant challenge in the current technology. No satisfactory solution has yet been found. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a rapid construction device and method for roller-compacted concrete in dams during the dry season, which can improve the construction efficiency of roller-compacted concrete and ensure the construction quality.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a rapid construction method for roller-compacted concrete dams during the dry season, comprising the following steps:

[0005] S1. Lay and compact concrete with a thickness of 50cm or more;

[0006] S2. Divide the paved roller-compacted concrete into compaction strips;

[0007] S3. Each rolling strip is compacted using two static compaction passes, at least six vibratory compaction passes, and two static compaction passes, with different compaction equipment used for static compaction and vibratory compaction respectively.

[0008] The above steps enable rapid construction of roller-compacted concrete for dams.

[0009] In the preferred embodiment, the paving thickness is 58cm.

[0010] In the preferred scheme, cooling water pipes are buried every two layers of paving. The cooling water pipes are arranged in an "S" shape, and the length direction of a single cooling water pipe is consistent with the length direction of the dam.

[0011] In the preferred embodiment, in step S3, the compaction equipment includes a non-reactive vibratory roller and a vibratory compaction vehicle. Each compaction strip is compacted by the non-reactive vibratory roller with two passes of static compaction, then by the vibratory compaction vehicle with five to seven passes of vibratory compaction, then by the non-reactive vibratory roller with one pass of non-reactive vibratory compaction, and finally by the non-reactive vibratory roller with two passes of static compaction.

[0012] In the preferred embodiment, the non-rebound compaction construction refers to adding at least one impact on the ground after the moment when the eccentric block has the maximum impact force on the ground, in order to suppress the rebound of the compacted concrete.

[0013] In the preferred embodiment, the concrete should be spread into a flat layer within 10 minutes of being unloaded in the paving area, with the thickness deviation controlled within 10%.

[0014] The overlap width between rolling strips is 15~20cm, and the overlap length at the ends is 100cm;

[0015] The compaction speed is 1~1.5km / h;

[0016] The time from paving to the completion of compaction should be controlled within 2 hours.

[0017] An apparatus for a rapid construction method of roller-compacted concrete for dams during the dry season, wherein the structure of the non-reactive vibratory roller is as follows: a main shaft that can rotate relative to the roller is provided inside the steel roller, the main shaft is connected to a drive device, an eccentric block is fixed on the main shaft, and a counter-reflection roller is also provided on the main shaft, the counter-reflection roller being connected to an impact counterweight via a flexible connecting belt.

[0018] The impact counterweight is set so that it generates an impact when the eccentric block rotates through the lower limit position.

[0019] In the preferred embodiment, the anti-reflection roller is fixedly connected to the main shaft, the impact counterweight is cylindrical, and the length of the flexible connecting belt is set such that when the eccentric block approaches the lower limit position, the impact counterweight passes the upper limit sliding position of the anti-reflection roller and the impact counterweight.

[0020] When the eccentric block crosses the lower limit position, the impact counterweight falls to the lower limit position.

[0021] In a preferred embodiment, the traction frame is connected to the main shaft via a first bearing, a mounting base is provided on the traction frame, at least one driver is fixed on the mounting base, the driver is connected to the main drive gear via a reducer, and a driven gear is provided at the end of the main shaft, with the main drive gear and the driven gear meshing together.

[0022] A second bearing is provided near both ends inside the steel roller. The second bearing is connected to the inner wall of the steel roller through multiple support columns, and the main shaft is supported inside the second bearing.

[0023] The end of the spindle is connected to the spindle via a flexible coupling to transmit torque;

[0024] The eccentric blocks are at least two located near both ends of the main shaft;

[0025] At least one set of anti-reflection rollers and impact counterweights is located between two eccentric blocks.

[0026] In a preferred embodiment, the steel roller, main shaft, eccentric block, anti-reflection roller, and impact counterweight are configured in pairs on each traction frame;

[0027] Multiple sets of anti-reflection rollers and impact counterweights are set on the main shaft, and the time interval between each set of impact counterweights falling to the lower limit position is 0.05s~1s;

[0028] The later the impact occurs, the lighter the weight of the counterweight.

[0029] A winch traction device is set up in the compacted area, and a pulley frame is set up at the other end of the compaction strip. The traction frame is pulled along the compaction strip by steel wire rope to carry out compaction construction.

[0030] This invention provides a rapid construction device and method for roller-compacted concrete (RCC) in dams during the dry season. By increasing the paving thickness and alternating static and vibratory compaction using different equipment, construction efficiency is improved while ensuring construction quality. The use of a non-reactive vibratory roller in the final pass shortens the compaction time within the compaction chamber, reduces the number of passes, and further ensures the density of the RCC. Testing showed a maximum density of 102.1%, a minimum compaction degree of 98.5%, an average of 99.4%, and a compaction degree exceeding 98.0% for all passes. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Figure 1 This is a top view of the compaction operation within the compaction chamber according to the present invention.

[0033] Figure 2 This is a side view of the non-vibration roller of the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of the impact counterweight of the non-reactive vibration roller of the present invention when it runs to the upper limit position.

[0035] Figure 4 This is a schematic diagram of the structure of the non-reactive vibration roller of the present invention when the impact counterweight operates to the lower limit position.

[0036] Figure 5 This is a top view of the non-reactive vibration mill of the present invention.

[0037] Figure 6 This is a top view of the preferred structure of the anti-vibration mill of the present invention.

[0038] Figure 7 The vibration curves of the non-reactive vibratory mill of the present invention and the vibration curves of the conventional vibratory mill are shown.

[0039] In the diagram: 1. Vibratory roller without counter-vibration; 101. Steel roller; 102. Support column; 103. Main drive gear; 104. Traction frame; 105. Eccentric block; 106. Driven gear; 107. Mounting base; 108. Impact counterweight; 109. Flexible connecting belt; 110. Counter-reflection roller; 111. Main shaft; 112. Reducer; 113. Driver; 114. First bearing; 115. Flexible coupling; 116. Second bearing; 2. Vibratory compactor; 3. Compacting strip; 4. Compacted area; 5. Paver; 6. Empty dump truck; 7. Fully loaded dump truck; 8. Traction rail; 9. Winch traction device; 10. Compacted area; 11. Detailed Implementation

[0040] Example 1:

[0041] like Figure 1 A rapid construction method for roller-compacted concrete dams during the dry season includes the following steps:

[0042] S1. Laying and compacting concrete, with a single-layer paving thickness of 58cm. The thickness after compaction is 50cm. In the preferred embodiment, during paving, a fully loaded dump truck 8 should enter the storage area from the unpaved area and unload in reverse, while an empty dump truck 7 should leave the storage area from the unpaved area. Within 10 minutes of unloading the concrete in the paving area, the paver 6 should spread it into a level layer, with a thickness deviation controlled within 10%. The paver 6 is preferably equipped with a laser-automatic leveling paving beam.

[0043] S2. Divide the paved roller-compacted concrete into roller-compacted strips 3; preferably, the width of the roller-compacted strip 3 is 2.1 meters, the overlap width between roller-compacted strips 3 is 15~20cm, and the overlap length at the end is 100cm.

[0044] S3. Compaction is carried out on each compaction strip 3 using a combination of two static compaction passes, six vibratory compaction passes, and two static compaction passes. Different compaction equipment is used for both static and vibratory compaction. By using different equipment for static and vibratory compaction, different construction steps can be staggered, allowing each compaction strip 3 to be compacted simultaneously. For example, two static compaction passes can be performed on the first and third compaction strips 3 first. After the static compaction is completed, the vibratory compaction vehicle 2 can then perform vibratory compaction on the first and third compaction strips 3. Meanwhile, static compaction is performed on the second and fourth compaction strips 3 simultaneously. After the vibratory compaction on the first and third compaction strips 3 is completed, the vibratory compaction vehicle 2 moves to the second and fourth compaction strips 3 for vibratory compaction, while the static compaction equipment returns to the first and third compaction strips 3 for final static compaction. This scheme can significantly improve the efficiency of compaction. Moreover, the non-reactive vibration roller 1 of the present invention is used in conjunction with static compaction and non-reactive vibration compaction. The non-reactive vibration roller 1 has a simple structure and does not significantly increase the cost.

[0045] In the preferred scheme, cooling water pipes are buried every two layers of paving, arranged in an "S" shape, with the length of each individual cooling water pipe aligned with the length of the dam. The cooling water pipes are preferably made of high-thermal-conductivity HDPE plastic, with a thermal conductivity ≥1.66 kJ / (m·h·℃). The inner diameter of the main pipe is preferably 32.6 mm, and the inner diameter of the branch pipes is preferably 28 mm. The distance from the cooling water pipes to the upstream and downstream dam faces is 1.0 m to 1.5 m; the distance to the horizontal joints and temporary joints is 0.8 m to 1.5 m, and the horizontal and vertical spacing is not less than 1.0 m (1.0 m is used in this example).

[0046] In the preferred embodiment, in step S3, the compaction equipment includes a non-reactive vibratory roller 1 and a vibratory roller 2. Each compaction strip 3 is compacted by the non-reactive vibratory roller 1 with two passes of static compaction, followed by five to seven passes of vibratory compaction by the vibratory roller 2, then one pass of non-reactive vibratory compaction by the non-reactive vibratory roller 1, and finally two passes of static compaction by the non-reactive vibratory roller 1. Preferably, in this example, two passes of static compaction, five passes of vibratory compaction, one pass of non-reactive vibratory compaction, and two passes of static compaction are used. The inventors tested the number of compaction passes and found that while the scheme of 2 static compaction passes + 8 vibration compaction passes + 2 static compaction passes resulted in higher density in some areas, the density and shear strength of other areas actually decreased. Analysis suggested that the excessively long compaction time made it difficult to ensure the optimal 2-hour construction time. Furthermore, during the final 1-3 vibration compaction passes, the compaction and rebound of the concrete disrupted some of the initial hydration process, leading to a decrease in density and strength. However, using a non-reactive vibratory roller... Figure 7As shown, at least two impacts can be generated, thereby effectively suppressing the rebound of roller-compacted concrete and ensuring the density and strength of roller-compacted concrete.

[0047] In the preferred embodiment, non-vibration compaction refers to adding at least one impact to the ground after the moment when the eccentric block 105 exerts the maximum impact force on the ground, in order to suppress the rebound of the compacted concrete. The time interval between the two impacts varies depending on the compaction parameters and needs to be determined experimentally before construction.

[0048] The compaction speed is 1~1.5km / h;

[0049] The time from paving to the completion of compaction should be controlled within 2 hours.

[0050] The above steps enable rapid construction of roller-compacted concrete for dams.

[0051] Example 2:

[0052] like Figure 1 A rapid construction method for roller-compacted concrete dams during the dry season includes the following steps:

[0053] S1. Laying and compacting concrete, with a single-layer paving thickness of 50cm. The thickness after compaction is 43cm. In the preferred embodiment, during paving, a fully loaded dump truck 8 should enter the storage area from the unpaved area and unload in reverse, while an empty dump truck 7 should leave the storage area from the unpaved area. Within 10 minutes of unloading the concrete in the paving area, the paver 6 should spread it into a level layer, with a thickness deviation controlled between 2% and 9%. The paver 6 is preferably equipped with a laser-automatic leveling paving beam.

[0054] S2. Divide the paved roller-compacted concrete into roller-compacted strips 3; preferably, the width of the roller-compacted strips 3 is 2.05~1.15 meters, the overlap width between roller-compacted strips 3 is 10~18cm, and the end overlap length is 80~120cm.

[0055] S3. Each compaction strip 3 is compacted using a series of steps: two passes of static compaction, four passes of vibratory compaction, one pass of non-reactive vibratory compaction, and two passes of static compaction. Different compaction equipment is used for both static and vibratory compaction. Using different equipment for static and vibratory compaction allows for staggering different construction processes, enabling simultaneous construction of each compaction strip 3.

[0056] For example, using a non-reactive vibratory roller 1, two initial static compaction passes are first performed on the first and third compaction strips 3. After the static compaction is completed, a vibratory roller 2 performs vibratory compaction on the first and third compaction strips 3. At this time, two initial static compaction passes are simultaneously performed on the second and fourth compaction strips 3. After four vibratory compaction passes are completed on the first and third compaction strips 3, the vibratory roller 2 moves to the second and fourth compaction strips 3 for vibratory compaction. The non-reactive vibratory roller 1 returns to the first and third compaction strips 3 for one non-reactive vibratory compaction pass and two final static compaction passes. During this process, the non-reactive vibratory roller 1 also performs two passes simultaneously on the fifth and seventh compaction strips 3. After the initial static compaction is completed, the non-reactive vibratory roller 1 only performs subsequent initial static compaction. After the initial static compaction of the fifth and seventh compaction strips 3 is completed, it moves to the sixth and eighth compaction strips 3. After the vibratory compaction of the second and fourth compaction strips 3 is completed, the vibratory roller 2 moves to the fifth and seventh compaction strips 3 to perform vibratory compaction. After the first and third compaction strips 3 have completed one pass of non-reactive vibratory compaction and two final static compaction passes, it moves to the second and fourth compaction strips 3 to perform one pass of non-reactive vibratory compaction and two final static compaction passes, and so on. Multiple constructions can be carried out simultaneously, and the construction equipment does not need to wait for a long time, resulting in higher efficiency.

[0057] This solution can significantly improve the efficiency of compaction construction. Moreover, using the non-reactive vibration roller 1 of this invention for both static compaction and non-reactive vibration compaction construction, the non-reactive vibration roller 1 has a simple structure and does not significantly increase costs.

[0058] In the preferred scheme, cooling water pipes are buried every two layers of paving, arranged in an "S" shape, with the length of each individual cooling water pipe aligned with the length of the dam. The cooling water pipes are preferably made of high-thermal-conductivity HDPE plastic, with a thermal conductivity ≥1.66 kJ / (m·h·℃). The inner diameter of the main pipe is preferably 32.6 mm, and the inner diameter of the branch pipes is preferably 28 mm. The distance from the cooling water pipes to the upstream and downstream dam faces is 1.0 m to 1.5 m; the distance to the horizontal joints and temporary joints is 0.8 m to 1.5 m, and the horizontal and vertical spacing is not less than 1.0 m (1.0 m is used in this example).

[0059] In the preferred embodiment, non-vibration compaction refers to adding at least one impact to the ground after the moment when the eccentric block 105 exerts the maximum impact force on the ground, in order to suppress the rebound of the compacted concrete. The time interval between the two impacts varies depending on the compaction parameters and needs to be determined experimentally before construction.

[0060] The compaction speed is 1~1.5km / h;

[0061] The time from paving to the completion of compaction should be controlled within 2 hours.

[0062] The above steps enable rapid construction of roller-compacted concrete for dams.

[0063] Example 3:

[0064] like Figure 1 A rapid construction method for roller-compacted concrete dams during the dry season includes the following steps:

[0065] S1. Laying and compacting concrete, with a single-layer paving thickness of 70cm. The thickness after compaction is 60cm. In the preferred embodiment, during paving, a fully loaded dump truck 8 should enter the storage area from the unpaved area and unload in reverse, while an empty dump truck 7 should leave the storage area from the unpaved area. Within 10 minutes of unloading the concrete in the paving area, the paver 6 should spread it into a level layer, with a thickness deviation controlled within 8%. The paver 6 is preferably equipped with a laser-automatic leveling paving beam.

[0066] S2. Divide the paved roller-compacted concrete into roller-compacted strips 3; preferably, the width of the roller-compacted strips 3 is 2 meters, the overlap width between roller-compacted strips 3 is 10~15cm, and the overlap length at the ends is 150cm.

[0067] S3. Each compaction strip 3 is compacted using a series of steps: two passes of static compaction, seven passes of vibratory compaction, one pass of non-reactive vibratory compaction, and two passes of static compaction. Different compaction equipment is used for both static and vibratory compaction. Using different equipment for static and vibratory compaction allows for staggering different construction processes, enabling simultaneous construction of each compaction strip 3.

[0068] For example, using a non-reactive vibratory roller 1, two initial static compaction passes are first performed on the first and third compaction strips 3. After the static compaction is completed, a vibratory roller 2 performs vibratory compaction on the first and third compaction strips 3. At this time, two initial static compaction passes are simultaneously performed on the second and fourth compaction strips 3. After the seven vibratory compaction passes on the first and third compaction strips 3 are completed, the vibratory roller 2 moves to the second and fourth compaction strips 3 for vibratory compaction. The non-reactive vibratory roller 1 returns to the first and third compaction strips 3 for one non-reactive vibratory compaction pass and two final static compaction passes. After the compaction is completed, it proceeds to the fifth and seventh compaction strips 3. Two initial static compaction passes are performed. After the initial static compaction of the fifth and seventh compaction strips 3 is completed, wait for the vibratory roller 2 to complete the vibratory compaction of the second and fourth compaction strips 3. After the vibratory roller 2 completes the vibratory compaction of the second and fourth compaction strips 3, it moves to the fifth and seventh compaction strips 3 for vibratory compaction. At this time, the non-reactive vibratory roller 1 moves to the second and fourth compaction strips 3 to perform one non-reactive vibratory compaction pass and two final static compaction passes. After the compaction is completed, it moves to the sixth and eighth compaction strips 3 for two initial static compaction passes, and so on. Multiple constructions can be carried out simultaneously, which is more efficient.

[0069] This solution can significantly improve the efficiency of compaction construction. Moreover, using the non-reactive vibration roller 1 of this invention for both static compaction and non-reactive vibration compaction construction, the non-reactive vibration roller 1 has a simple structure and does not significantly increase costs.

[0070] In the preferred scheme, cooling water pipes are buried every two layers of paving, arranged in an "S" shape, with the length of each individual cooling water pipe aligned with the length of the dam. The cooling water pipes are preferably made of high-thermal-conductivity HDPE plastic, with a thermal conductivity ≥1.66 kJ / (m·h·℃). The inner diameter of the main pipe is preferably 32.6 mm, and the inner diameter of the branch pipes is preferably 28 mm. The distance from the cooling water pipes to the upstream and downstream dam faces is 1.0 m to 1.5 m; the distance to the horizontal joints and temporary joints is 0.8 m to 1.5 m, and the horizontal and vertical spacing is not less than 1.0 m (1.0 m is used in this example).

[0071] In the preferred embodiment, non-vibration compaction refers to adding at least one impact to the ground after the moment when the eccentric block 105 exerts the maximum impact force on the ground, in order to suppress the rebound of the compacted concrete. The time interval between the two impacts varies depending on the compaction parameters and needs to be determined experimentally before construction.

[0072] The compaction speed is 1~1.5km / h;

[0073] The time from paving to the completion of compaction should be controlled within 2 hours.

[0074] The above steps enable rapid construction of roller-compacted concrete for dams.

[0075] Example 4:

[0076] like Figures 2-6 In this invention, a device for a rapid construction method of roller-compacted concrete for dams during the dry season is described. The principle of vibration-free compaction is based on the theory of accumulation. Traditional vibratory compactors exhibit a rebound phenomenon during operation; that is, when the vibrating wheel contacts the ground and applies pressure, the compactor will bounce or surge due to the ground's reaction force. This rebound not only affects the compaction effect but may also increase equipment wear. In particular, this rebound can easily damage the hydrated and hardened microstructure, affecting the quality of the finished product. However, by continuously applying pressure after vibration, the rebound is suppressed, resulting in a denser accumulation of components and preventing the damage to some hydrated and hardened microstructures caused by the rebound phenomenon. This improves the compaction density of the vibratory compaction and enhances the quality of the finished roller-compacted concrete.

[0077] like Figures 2-5 In the structure of the non-reactive vibratory roller 1, the main shaft 111 that can rotate relative to the steel roller 101 is provided inside, the main shaft 111 is connected to the drive device, the traction frame 104 is connected to the main shaft 111 through the first bearing 114, the eccentric block 105 is fixed on the main shaft 111, and the anti-reflection roller 110 is also provided on the main shaft 111. The anti-reflection roller 110 is connected to the impact counterweight 108 through the flexible connecting belt 109.

[0078] The impact counterweight 108 is configured to generate an impact when the eccentric block 105 rotates through its lower limit position. That is, after the eccentric block 105 impacts downwards, the impact counterweight 108 adds another impact to suppress the rebound of the roller-compacted concrete. Preferably, the flexible connecting belt 109 controls the interval between the impact of the impact counterweight 108 and the impact of the eccentric block 105 by adjusting its installation length. This interval is related to the concrete thickness, elastic modulus, and diameter of the steel roller 101, and needs to be selected experimentally.

[0079] During static pressure compaction, the steel roller 101 is located on the compaction belt 3. The traction frame 104 moves along the compaction belt 3, driving the main shaft 111 to move. The main shaft 111 moves, driving the steel roller 101 to move on the compaction belt 3. Under the action of friction, the steel roller 101 rolls on the compaction belt 3, completing the static pressure compaction.

[0080] Preferred solutions include Figure 5 , 6In the middle, the anti-reflection roller 110 is fixedly connected to the main shaft 111, the impact counterweight 108 is cylindrical, and the length of the flexible connecting belt 109 is set such that when the eccentric block 105 approaches the lower limit position, the impact counterweight 108 crosses the upper limit sliding position of the anti-reflection roller 110 and the impact counterweight 108.

[0081] When the eccentric block 105 crosses the lower limit position, the impact counterweight 108 falls to the lower limit position. That is, the time when the impact counterweight 108 falls to the lower limit position is slightly later than the time when the eccentric block 105 reaches the lower limit position. Preferably, in this example, the self-weight of the eccentric block 105 is 260KG, and the self-weight of the impact counterweight 108 is 64KG, that is, the self-weight of the impact counterweight 108 is lower than the self-weight of the eccentric block 105.

[0082] Preferred solutions include Figure 5 , 6 In this invention, a mounting base 107 is provided on the traction frame 104, and at least one driver 113 is fixed on the mounting base 107. The driver 113 is preferably a servo motor, and the driver 113 is connected to the main transmission gear 103 through a reducer 112. The reducer is preferably an RV reducer with a reduction ratio of 50:1. The maximum speed of the servo motor is 3000 rpm, and the vibration frequency of the eccentric block 105 is from 4Hz to 60Hz. In an optional embodiment, the servo motor can also be replaced by a hydraulic motor. It should be noted that in the non-reactive vibration roller 1 of this invention, after removing the impact counterweight 108, it can be used as a regular vibration roller. In the regular vibration roller state, the working frequency is 30Hz to 50Hz. In the non-reactive vibration roller working mode, the working frequency is 4Hz to 45Hz, preferably below 15Hz. A driven gear 106 is provided at the end of the main shaft 111. The main drive gear 103 is meshed with the driven gear 106. When the driver 113 is started, it will drive the drive gear 103 to rotate through the reducer 112. The rotation of the drive gear 103 will drive the drive gear 106 to rotate. The rotation of the drive gear 106 will drive the main shaft 111 to rotate. The rotation of the main shaft 111 will drive the eccentric block 105 and the anti-reflection roller 110 to rotate. When the eccentric block 105 rotates from the high position to the lower limit position, it will generate a downward impact. The rotation of the anti-reflection roller 110 will drive the impact counterweight 108 to rotate through the flexible connecting belt 109. When the impact counterweight 108 rotates past the upper limit position and slides down, it will generate a downward impact.

[0083] A second bearing 116 is provided near both ends inside the steel roller 101. The second bearing 116 is connected to the inner wall of the steel roller 101 through multiple support columns 102. The main shaft 111 is supported inside the second bearing 116. The steel roller 101 is supported on the main shaft 111 through the support columns 102 and the second bearing 116. The main shaft 111 and the steel roller 101 can rotate relative to each other.

[0084] The end of the main shaft 111 is connected to the main shaft 111 via an elastic coupling 115 to transmit torque and reduce the impact of vibration on the drive device and reducer. The traction frame 104 is connected to the end of the main shaft 111 via the first bearing 114. During the non-vibration rolling process, the impact energy of the eccentric block 105 and the impact counterweight 108 is transmitted to the steel roller 101 through the main shaft 111, the second bearing 116 and the support column 102, and the impact on the traction frame 104 and the drive device is mitigated by the elastic coupling 115 to ensure the stable drive of the drive device.

[0085] There are at least two eccentric blocks 105, located near both ends of the main shaft 111;

[0086] At least one set of the anti-reflection roller 110 and the impact counterweight 108 is located between the two eccentric blocks 105.

[0087] Preferred solutions include Figure 6 In this process, two steel rollers 101, main shaft, eccentric block 105, anti-reflection roller 110 and impact counterweight 108 are set on each traction frame 104, so that two continuous rolling operations can be carried out in a short time during static pressure rolling and non-reflective vibration rolling, resulting in better rolling effect.

[0088] Preferably, the anti-rebound roller 110 and the impact counterweight 108 are set in multiple groups on the main shaft, and the empirical data for the time interval between the fall of each group of impact counterweight 108 to the lower limit position is 0.05s~1s; preferably, the impact counterweight 108 that is later in time is lighter in weight, and the multiple falls and the impact force gradually decreases, which has a better effect on suppressing the rebound of roller-compacted concrete.

[0089] like Figure 1 In this method, a winch traction device 10 is installed in the compacted area 11, and a pulley frame 5 is installed at the other end of the compaction strip 3. The reciprocating motion of the non-reactive vibratory roller 1 is achieved by changing the direction of the pulley block. The traction frame 104 is pulled by a wire rope along the compaction strip 3 for compaction. The advantage of this scheme is that it eliminates the vehicle structure of the existing vibratory roller, which has little effect on vibratory compaction and significantly increases construction costs. Another advantage is that, compared with vibratory rollers, the winch traction device 10 makes it easier to control the compaction position accuracy and improve the construction quality.

[0090] During non-vibration compaction, the traction frame 104 moves along the compaction belt 3, causing the steel roller 101 to roll. Simultaneously, the driver 113 drives the eccentric block 105 and the anti-reflection roller 110 to rotate. When the eccentric block 105 rotates from its highest position to its lower limit position, it generates a downward impact. This impact is transmitted sequentially through the main shaft 111, the second bearing 116, and the support column 102 to the steel roller 101, ultimately acting on the compaction belt 3. When the eccentric block 105 completes its impact, the anti-reflection roller 110 rotates, causing the impact counterweight 108 to rotate via the flexible connecting belt 109. At the upper limit position, the main shaft 111 continues to rotate, causing the impact counterweight 108 to cross the upper limit position and slide down under the action of gravity to complete the secondary impact. This impact will be transmitted to the steel roller 101 in sequence through the flexible connecting belt 109, the anti-rebound roller 110, the main shaft 111, the second bearing 116 and the support column 102, and finally act on the compaction strip 3. The two impacts are completed in a short time, which can effectively suppress the rebound of the compacted concrete and ensure the compaction and strength of the compacted concrete. The above process continues as the main shaft 111 rotates, completing the non-rebound vibration compaction construction.

[0091] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The embodiments and features described in these embodiments can be arbitrarily combined without conflict. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A rapid construction device for roller-compacted concrete in dams during the dry season, characterized in that: The non-reactive vibration roller (1) has the following structure: a main shaft (111) that can rotate relative to the main shaft (111) is provided inside the steel roller (101), the main shaft (111) is connected to the drive device, an eccentric block (105) is fixed on the main shaft (111), and a counter-reflection roller (110) is also provided on the main shaft (111). The counter-reflection roller (110) is connected to the impact counterweight (108) through a flexible connecting belt (109). The impact counterweight (108) is set such that when the eccentric block (105) rotates through the lower limit position, the impact counterweight (108) generates an impact; The traction frame (104) is connected to the main shaft (111) through the first bearing (114). A mounting seat (107) is provided on the traction frame (104). At least one driver (113) is fixed on the mounting seat (107). The driver (113) is connected to the main drive gear (103) through the reducer (112). A driven gear (106) is provided at the end of the main shaft (111). The main drive gear (103) and the driven gear (106) are meshed. A second bearing (116) is provided near both ends inside the steel roller (101). The second bearing (116) is connected to the inner wall of the steel roller (101) through multiple support columns (102). The main shaft (111) is supported inside the second bearing (116). The end head of the spindle (111) is connected to the spindle (111) via a flexible coupling (115) to transmit torque; The eccentric blocks (105) are at least two located near the two ends of the main shaft (111); At least one set of the anti-reflection roller (110) and the impact counterweight (108) is located between the two eccentric blocks (105).

2. The rapid construction device for roller-compacted concrete dams during the dry season according to claim 1, characterized in that: The anti-reflection roller (110) is fixedly connected to the main shaft (111), the impact counterweight (108) is cylindrical, and the length of the flexible connecting belt (109) is set such that when the eccentric block (105) approaches the lower limit position, the impact counterweight (108) passes the upper limit sliding position of the anti-reflection roller (110) and the impact counterweight (108). When the eccentric block (105) crosses the lower limit position, the impact counterweight (108) falls to the lower limit position.

3. The rapid construction device for roller-compacted concrete dams during the dry season according to claim 1, characterized in that: The steel roller (101), main shaft, eccentric block (105), anti-reflection roller (110) and impact counterweight (108) are provided in two on each traction frame (104); The anti-reflection roller (110) and the impact counterweight (108) are set in multiple groups on the main shaft, and the time interval between each group of impact counterweights (108) falling to the lower limit position is 0.05s~1s; The later the impact counterweight (108) is, the lighter its weight; A winch traction device (10) is set up in the compacted area (11), and a pulley frame (5) is set up at the other end of the compaction strip (3). The traction frame (104) is pulled by a wire rope to carry out compaction construction along the compaction strip (3).

4. The method of using the rapid construction device for roller-compacted concrete of dams during the dry season as described in any one of claims 1 to 3, characterized in that: Includes the following steps: S1. Lay and compact concrete with a thickness of 50cm or more; S2. Divide the paved roller-compacted concrete into roller-compacted strips (3); S3. The compaction equipment includes a non-reactive vibratory roller (1) and a vibratory roller (2). Each compaction strip (3) is compacted by the non-reactive vibratory roller (1) for 2 passes of static compaction, then by the vibratory roller (2) for 5 to 7 passes of vibratory compaction, then by the non-reactive vibratory roller (1) for 1 pass of non-reactive vibratory compaction, and finally by the non-reactive vibratory roller (1) for 2 passes of static compaction. The above steps enable rapid construction of roller-compacted concrete for dams.

5. The method of using the rapid construction device for roller-compacted concrete of dams during the dry season according to claim 4, characterized in that: The paving thickness is 58cm.

6. The method of using the rapid construction device for roller-compacted concrete of dams during the dry season according to claim 4, characterized in that: Cooling water pipes are laid in an "S" shape for every two layers of paving, with the length of each cooling water pipe aligned with the length of the dam.

7. The method of using the rapid construction device for roller-compacted concrete of dams during the dry season according to claim 4, characterized in that: The aforementioned non-rebound vibration compaction construction refers to adding at least one impact on the ground after the moment when the eccentric block (105) has the maximum impact force on the ground, in order to suppress the rebound of the compacted concrete.

8. The method of using the rapid construction device for roller-compacted concrete of dams during the dry season according to claim 4, characterized in that: concrete Within 10 minutes of unloading in the paving area, the material should be spread into a flat layer with a thickness deviation controlled within 10%. The overlap width between the rolling strips (3) is 15~20cm, and the overlap length at the ends is 100cm; The compaction speed is 1~1.5km / h; The time from paving to the completion of compaction should be controlled within 2 hours.

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