Roller compacted concrete dam drainage pipe forming device and construction method

Abstract

The present invention provides a roller compacted concrete dam drainage pipe forming device and construction method, including a formed pipe body, a lifting ring is provided on the top of the formed pipe body, the lifting ring is fixedly connected to a chain, and a vibration motor is fixedly provided inside the formed pipe body. The vibration motor is arranged at a position close to the top 1 / 3. During construction, the formed pipe body is buried in the roller compacted concrete layer, and a new layer of roller compacted concrete is spread; vibrate and roll; start the vibration motor to vibrate, so that the inner wall of the drainage pipe is flooded; pull out the formed pipe body, and the roller compacted concrete dam drainage pipe forming construction is realized through the above steps. By arranging a vibration motor in the formed pipe body, the forming quality of the drainage pipe can be improved, and by controlling the vibration timing, frequency and time of the vibration motor, the roller compacted concrete around the drainage pipe can be initially set in advance to avoid the risk of collapse. The vibration of the vibration motor makes the contact position of the formed pipe body flooded with more slurry, making the inner wall of the drainage pipe smoother and eliminating pore defects.

Description

Technical Field

[0001] The invention relates to the field of hydropower construction, and in particular to a roller compacted concrete dam drainage pipe forming device and a construction method. Background Art

[0002] The existing RCC dam drainage pipe forming construction mostly adopts the scheme of pre-buried pipes or drilling holes to form drainage holes. Both methods have the following defects:

[0003] 1. The pre-buried pipes are constructed with drainage holes, so that the pre-buried corrugated pipes are placed in a disorderly manner in the RCC silo surface, which seriously hinders the paving and rolling construction of RCC and seriously affects the construction progress of RCC. The speed advantage of RCC construction is not brought into play.

[0004] 2. The method of drilling drainage holes on the warehouse surface, dam top or corridor during intermittent periods is adopted. The related equipment is likely to cause cross-interference in construction, affecting the progress of the project, and the cost is very high.

[0005] 3. Chinese patent document CN 205917663 U records a drainage hole forming device for a roller compacted concrete dam, comprising a steel pipe with a sealing cap on the top, the bottom end of the steel pipe is an inverted cone structure, and the outer peripheral surface of the steel pipe is covered with a water-permeable rubber membrane; the top of the sealing cap is hinged with a pull ring, and a steel wire is fixed on the pull ring. The utility model has the advantage that it is specially designed for the formation of the drainage hole of the roller compacted concrete dam. When in use, the steel pipe can be pulled with a small pulling force to form the drainage hole and rise synchronously with the roller compacted concrete, which adapts to the characteristics of rapid construction of roller compacted concrete. When the roller compacted concrete where the drainage hole is located is completed, the drainage hole is also completed synchronously. Compared with the above-mentioned existing methods, the construction is convenient and the cost is low. It is particularly suitable for the formation of non-vertical drainage holes, such as the construction of drainage holes in roller compacted concrete hyperbolic arch dams. However, the initial setting time of roller compacted concrete is short. If the pipe is pulled out early, the hole is prone to collapse. If the pipe is pulled out late, the inner wall of the drainage hole is easily damaged, causing problems such as rupture of the inner wall of the drainage hole, which affects the later drainage. Since the vibrating roller in this scheme deliberately avoids the hole-making position, the rolled concrete near the steel pipe is not compacted enough, which easily leads to defects such as shrinkage and bubbles on the inner wall of the drainage hole. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a roller compacted concrete dam drainage pipe forming device and construction method, which can further ensure the hole forming quality of the drainage pipe. In the preferred scheme, it can help construction personnel determine the optimal pipe pulling time, and can also provide real-time feedback on the surface slurry state inside the roller compacted concrete, helping construction personnel understand the interlayer bonding condition of the roller compacted concrete.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is: a roller compacted concrete dam drainage pipe forming device, including a formed pipe body, a lifting ring is provided on the top of the formed pipe body, the lifting ring is fixedly connected to the chain, and a vibration motor is fixedly provided inside the formed pipe body.

[0008] In a preferred solution, the vibration motor is arranged near the top 1 / 3.

[0009] In a preferred solution, the vibration motor is a double-extended shaft motor, and eccentric blocks are fixedly provided at both ends of the output shaft of the vibration motor.

[0010] In a preferred solution, the phases of the eccentric blocks are the same.

[0011] In a preferred solution, a battery and a control device are also provided in the formed tube body, a mesh plate is provided at the bottom of the formed tube body, a temperature and humidity sensor is provided in the mesh plate, and the temperature and humidity sensor is electrically connected to the control device.

[0012] In a preferred solution, an illumination light source and an image sensor are also provided at the bottom of the screen, and the illumination light source and the image sensor are electrically connected to the control device.

[0013] In a preferred solution, a transparent arc-shaped protective cover is provided outside the illumination light source and the image sensor, and a hydrophobic layer is coated on the outer wall of the arc-shaped protective cover.

[0014] In a preferred solution, a bracket is further provided, the bracket is provided with a plurality of legs, and the electric hoist is connected to the top of the bracket.

[0015] In a preferred embodiment, the electric hoist is connected to the top of the bracket via a rotating shaft;

[0016] There is also a metal detector on the stand;

[0017] The formed tube body is also provided with a wire for connecting to an external power source;

[0018] The control device is provided with a near field communication module.

[0019] A construction method using the above-mentioned roller compacted concrete dam drainage pipe forming device comprises the following steps:

[0020] s1. The formed tube body is buried in the RCC layer, and the height of the top of the formed tube body exposed from the RCC layer is the height of a single layer of the RCC layer minus 1-10 cm;

[0021] s2, laying a new layer of RCC;

[0022] s3, vibration rolling;

[0023] s4. Start the vibration motor to vibrate, so that the inner wall of the drainage pipe is covered with slurry;

[0024] s5. Pull out the formed tube body, the pulling-out height being the height of a single layer of the RCC layer;

[0025] The above steps are used to realize the forming construction of the roller compacted concrete dam drainage pipe.

[0026] The present invention provides a roller compacted concrete dam drainage pipe forming device and construction method. By setting a vibration motor in the forming pipe body, the forming quality of the drainage pipe can be improved. By controlling the vibration timing, frequency and time of the vibration motor, the roller compacted concrete around the drainage pipe can be initially set in advance to avoid the risk of hole collapse. The vibration of the vibration motor makes the contact position of the forming pipe body have a larger amount of slurry, so that the inner wall of the drainage pipe eliminates pore defects. The set temperature and humidity sensors can monitor the hydration heat condition of the roller compacted concrete layer in real time, and provide auxiliary assistance for determining the initial setting time. The set image sensor can transmit the image of the inner wall of the drainage pipe in real time, helping construction personnel to confirm the surface slurry condition, the interlayer bonding condition, whether the hole collapse defect occurs, and the surface quality of the drainage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 It is a schematic diagram of pipe laying construction during the construction of the present invention.

[0030] Figure 3 It is a schematic diagram of paving construction during the construction of the present invention.

[0031] Figure 4 It is a schematic diagram of rolling construction during the construction of the present invention.

[0032] Figure 5 It is a schematic diagram of pipe pulling construction during the construction of the present invention.

[0033] Figure 6 It is a control block diagram of the present invention.

[0034] In the figure: formed tube body 1, lifting ring 2, chain 3, joint 4, vibration motor 5, battery 6, temperature and humidity sensor 7, mesh plate 8, image sensor 9, lighting source 10, rolled concrete layer 11, bracket 12, metal detector 13, electric hoist 14, rotating shaft 15, wire 16, drain pipe 17. DETAILED DESCRIPTION

[0035] Embodiment 1:

[0036] like Figure 1In the invention, a roller compacted concrete dam drainage pipe forming device comprises a forming pipe body 1, the outer wall of the forming pipe body 1 is provided with a draft angle of 1° to 5°, the length of the forming pipe body 1 is 2 to 3 times the height of the roller compacted concrete layer 11, and the height of each roller compacted concrete layer 11 is usually 30 cm, and the height of the forming pipe body 1 is 60 to 90 cm. Preferably, the length of the forming pipe body 1 is 2 to 3 times the height of the roller compacted concrete layer 11.

[0037] A lifting ring 2 is provided on the top of the formed pipe body 1, and the lifting ring 2 is fixedly connected to the chain 3. A vibration motor 5 is fixedly provided inside the formed pipe body 1. The vibration motor 5 is provided to make the surface of the rolled concrete slurry before the initial setting of the rolled concrete layer 11, so that the inner wall of the drainage pipe 17 can be hardened earlier than the rolled concrete layer 11, thereby avoiding the occurrence of a hole collapse accident and facilitating the pipe pulling operation.

[0038] The preferred solution is Figure 1 In the embodiment, the vibration motor 5 is arranged near the top 1 / 3. Thus, the vibration is mainly concentrated on the upper part of the formed tube body 1.

[0039] The preferred solution is Figure 1 In the embodiment, the vibration motor 5 is a double-extension shaft motor, and eccentric blocks are fixedly arranged at both ends of the output shaft of the vibration motor 5. In a preferred embodiment, the phases of the eccentric blocks are the same. With this structure, the vibration of the formed pipe body 1 is mainly along the circumference, so as to avoid the formation of swing damage to the inner wall of the formed drainage pipe 17.

[0040] The preferred solution is Figure 1 In the embodiment, a battery 6 and a control device are also provided in the formed tube body 1, a mesh plate 8 is provided at the bottom of the formed tube body 1, a temperature and humidity sensor 7 is provided in the mesh plate 8, and the temperature and humidity sensor 7 is electrically connected to the control device. Further preferably, a near field communication module is provided in the control device. The control device in this example adopts a single chip microcomputer, such as a 51 series single chip microcomputer, and the temperature and humidity sensor 7 collects the temperature and humidity in the drain pipe 17, which are then transmitted to the construction worker's handheld operating device by the control device through the near field communication module. The near field communication module in this example adopts zigbee or Bluetooth. The temperature and humidity sensor 7 adopts a BY-2003HT thermometer and hygrometer.

[0041] The preferred solution is Figure 1 In the embodiment, an illumination light source 10 and an image sensor 9 are also provided at the bottom of the mesh plate 8, and the illumination light source 10 and the image sensor 9 are electrically connected to the control device. With this structure, it is convenient to transmit the image of the inner wall of the drainage pipe 17 to the handheld operating device of the construction worker. The handheld operating device is a mobile phone, a tablet computer or a laptop.

[0042] The preferred solution is Figure 1In the embodiment, a transparent arc-shaped protective cover is provided outside the illumination light source 10 and the image sensor 9, and a hydrophobic layer is coated on the outer wall of the arc-shaped protective cover. The illumination light source 10 is preferably an LED illumination light source, and the image sensor 9 is a small CCD image sensor. With this structure, the illumination light source 10 and the image sensor 9 are prevented from being blocked by dirt. The control device, the temperature and humidity sensor 7, the illumination light source 10 and the image sensor 9 in this example are all accessories in the prior art.

[0043] The preferred solution is Figure 5 In the embodiment, a bracket 12 is provided, the bracket 12 is provided with a plurality of legs, and an electric hoist 14 is connected to the top of the bracket 12. With this structure, the formed pipe body 1 can be drawn in a straight line, avoiding damage to the inner wall of the drain pipe 17 during the process of drawing the formed pipe body 1.

[0044] The preferred solution is Figure 5 In the embodiment, the electric hoist 14 is connected to the top of the bracket 12 via a rotating shaft 15; with this structure, the electric hoist 14 can rotate along with the inclination angle of the formed tube body 1.

[0045] The bracket 12 is also provided with a metal detector 13 ; the metal detector 13 is used to find the buried and crushed chain 3 and the formed tube body 1 .

[0046] The formed tube body 1 is also provided with a wire 16 for connecting to an external power source; the power supply in this example adopts the following strategy, usually the temperature and humidity sensor 7, the image sensor 9, and the lighting source 10 are powered by the battery 6. The power supply of the vibration motor 5 is provided by the external power source through the wire (16), and a section of antenna is also attached to the wire (16) to break through the electromagnetic shielding of the drawn formed tube body 1 and send wireless signals. The opening and closing of the vibration motor 5 is controlled by the control device according to the set program or by the handheld operating device sending a control signal to the control device for control.

[0047] Embodiment 2:

[0048] like Figures 2~5 In the embodiment 1, a construction method using the above roller compacted concrete dam drainage pipe forming device comprises the following steps:

[0049] s1. The formed tube body 1 is buried in the roller compacted concrete layer 11. The height of the top of the formed tube body 1 exposed from the roller compacted concrete layer 11 is the height of a single layer of the roller compacted concrete layer minus 1 to 10 cm. That is, after rolling, the formed tube body 1 in this example will be completely buried in the roller compacted concrete layer 11. This step can prevent the vibration roller from colliding with the formed tube body 1. Figure 2 as shown in .

[0050] s2, paving a new layer of roller compacted concrete, the new roller compacted concrete completely covers the formed pipe body 1; Figure 3 as shown in .

[0051] s3. Vibration rolling: use the vibration roller to roll the entire warehouse surface flat;

[0052] s4, move the bracket 12 to the top of the formed tube body 1, use the metal detector 13 to find the chain 3, preferably the bracket 12 is an inclined bracket, the inclination direction is consistent with the inclination of the formed tube body 1, connect the chain 3 to the electric hoist 14, connect the wire 16 to the power interface of the bracket 12, start the vibration motor 5 to vibrate within the initial setting period, so that the inner wall of the drainage pipe 17 is flooded with slurry and the initial setting is advanced; the vibration motor 5 is preferably a variable frequency motor, and during the vibration process, the frequency of the vibration motor 5 is gradually reduced from 2000 times / minute to 50 times / minute. This is to facilitate the later pipe removal operation.

[0053] s5. Use the temperature and humidity sensor 7 and the image sensor 9 to collect data in the drainage pipe 17, and determine the time for pulling out the pipe in combination with the ambient temperature, which is usually within 3.5-6 hours. Start the electric hoist 14 to pull out the formed pipe body 1, and the pulling height is the height of a single layer of the roller compacted concrete layer; the above steps realize the forming construction of the drainage pipe of the roller compacted concrete dam.

[0054] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A roller compacted concrete dam drainage pipe forming device, comprising a formed pipe body (1), a lifting ring (2) is provided at the top of the formed pipe body (1), the lifting ring (2) is fixedly connected to a chain (3), and the device is characterized in that: a vibration motor (5) is fixedly provided inside the formed pipe body (1); The vibration motor (5) is arranged at a position close to the top 1 / 3, so that the vibration is mainly concentrated at the upper part of the formed tube body (1), and is conducive to the tube pulling operation; The vibration motor (5) is a double-extension shaft motor, and eccentric blocks are fixedly provided at both ends of the output shaft of the vibration motor (5); By controlling the vibration timing, frequency and time of the vibration motor, the rolled concrete around the drainage pipe can be initially set in advance to avoid the risk of hole collapse. The vibration of the vibration motor makes the contact position of the formed pipe body have a larger amount of slurry, so that the inner wall of the drainage pipe can eliminate the pore defects. A storage battery (6) and a control device are also provided in the formed tube body (1); a mesh plate (8) is provided at the bottom of the formed tube body (1); a temperature and humidity sensor (7) is provided in the mesh plate (8); and the temperature and humidity sensor (7) is electrically connected to the control device; An illumination light source (10) and an image sensor (9) are also provided at the bottom of the screen plate (8), and the illumination light source (10) and the image sensor (9) are electrically connected to the control device; A transparent arc-shaped protective cover is provided outside the illumination light source (10) and the image sensor (9), and a hydrophobic layer is coated on the outer wall of the arc-shaped protective cover; A support (12) is also provided, the support (12) is provided with a plurality of legs, and an electric hoist (14) is connected to the top of the support (12); The molded tube body (1) is also provided with a wire (16) for connecting to an external power source; The control device is provided with a near field communication module.

2. The roller compacted concrete dam drainage pipe forming device according to claim 1 is characterized by: The phases of the eccentric blocks are the same.

3. The roller compacted concrete dam drainage pipe forming device according to claim 1 is characterized by: The electric hoist (14) is connected to the top of the bracket (12) via a rotating shaft (15); The bracket (12) is also provided with a metal detector (13).

4. A construction method using the roller compacted concrete dam drainage pipe forming device according to any one of claims 1 to 3, characterized in that The following steps are involved: s1. burying the formed tube body (1) in the roller compacted concrete layer (11), wherein the height of the top of the formed tube body (1) exposed from the roller compacted concrete layer (11) is the height of a single layer of the roller compacted concrete layer minus 1 to 10 cm; s2, laying a new layer of RCC; s3, vibration rolling; s4, starting the vibration motor (5) to vibrate, so that the inner wall of the drainage pipe (17) is flooded with slurry; The frequency of the vibration motor (5) is gradually reduced from 2000 times / minute to 50 times / minute to facilitate the extubation at a later stage; s5, pulling out the formed tube body (1), the pulling-out height being equal to the height of a single layer of the roller compacted concrete layer; Using a temperature and humidity sensor (7) and an image sensor (9) to collect data from the drainage pipe (17), and combining this with the ambient temperature, determine the time to remove the pipe; The above steps are used to realize the forming construction of the roller compacted concrete dam drainage pipe.

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