Method for directly warehousing roller compacted concrete dam transport vehicle

Abstract

The invention belongs to the technical field of hydraulic engineering, and particularly discloses a method for directly warehousing a roller compacted concrete dam transport vehicle. The invention discloses a method for directly warehousing a transport vehicle in a roller compacted concrete dam. The method comprises the following steps: constructing a cemented sand gravel road with a preset layer thickness at the downstream of the roller compacted concrete dam close to a bank slope side; a transport vehicle transports raw materials of the roller compacted concrete dam into a warehouse through the cemented sand gravel road; and the dam body of the roller compacted concrete dam with the preset layer thickness is constructed, and the cemented sand gravel road and the dam body are alternately constructed according to the preset layer thickness to the preset height. According to the method for directly warehousing the roller compacted concrete dam transport vehicle, the construction efficiency can be improved, and the cost can be saved.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a method for directly entering a roller compacted concrete dam transport vehicle into a warehouse. Background Art

[0002] The transportation of roller compacted concrete into the warehouse is a key link in the construction process of concrete dams. In related technologies, the main method of horizontal entry of roller compacted concrete into the warehouse is for the transport vehicles behind the dam to enter the warehouse directly. Normally, transport vehicles need to pass through the filling road and the steel trestle across the warehouse to enter the warehouse, but the filling road behind the dam requires a sufficiently wide filling site or a horse road on the side of the mountain, and it is necessary to cast a concrete road in the warehouse in advance to assist in entering the warehouse. The filling road requires the stacking of steel gabions on the side of the edge to protect the foot, and a crane needs to be used to lift the steel trestle during the rising process of the warehouse surface, which is costly. In addition, pouring the cast-in-place road in the warehouse requires a linear construction period. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a method for directly entering a roller compacted concrete dam transport vehicle into a warehouse, which can improve construction efficiency and save costs.

[0004] The method for directly transporting roller compacted concrete dam vehicles into a warehouse in an embodiment of the present invention comprises the following steps: constructing a cemented gravel road with a preset layer thickness on the downstream side of the roller compacted concrete dam near the bank slope; transport vehicles transport the roller compacted concrete dam raw materials into the warehouse via the cemented gravel road; constructing the dam body of the roller compacted concrete dam with the preset layer thickness, and the cemented gravel road and the dam body are alternately constructed with the preset layer thickness to a preset height.

[0005] It is understandable that a bonded gravel road is constructed on the downstream slope of the RCC dam. The bonded gravel road has bonding properties and does not require the use of reinforced gabion footings. It does not require a long period of time to cast. The bonded gravel road rises synchronously with the rise of the dam body. Transport vehicles can be directly transported into the warehouse through the bonded gravel road, and there is no need to use a steel trestle across the warehouse, which improves construction efficiency and saves costs.

[0006] In this embodiment, the method for direct entry of roller compacted concrete dam transport vehicles into a warehouse further includes the following steps: constructing a cut between the cemented gravel road and the dam body.

[0007] In this embodiment, the method for directly entering a roller compacted concrete dam transport vehicle into a warehouse further includes the following step: embedding a filler into the cut.

[0008] In this embodiment, a side of the dam body adjacent to the cemented gravel road extends 1m to 2m in a direction toward the cemented gravel road.

[0009] In this embodiment, the preset layer thickness is 27 cm to 33 cm.

[0010] In this embodiment, the construction method of the cemented gravel road includes the following steps: installing a support formwork on the side of the cemented gravel roadbed away from the bank slope; pouring road mixed materials; leveling the road mixed materials; and compacting the road mixed raw materials.

[0011] In this embodiment, the bonded gravel road is divided into a slope consolidation area, a self-bonding area and a slope consolidation area in sequence in the width direction, and the road mixed materials in the slope consolidation area and the self-bonding area are poured separately.

[0012] In this embodiment, the step of compacting the road mix raw material includes: rolling the road mix raw material in the self-bonding area; and vibrating the road mix raw material in the slope consolidation area.

[0013] In this embodiment, in the width direction of the cemented gravel road, the width of the slope consolidation area is 0.5m to 1m.

[0014] In this embodiment, before pouring the road mixed material, the construction method of the cemented gravel road also includes the following steps: mixing the raw materials of the road mixed material, and the mixing process includes the following steps: laying a first layer of gravel material; removing large stones exceeding a preset particle size; spreading a first layer of cement and a water reducer; laying a second layer of gravel material; removing large stones exceeding a preset particle size; spreading a second layer of cement and a water reducer; stirring the raw materials of the road mixed material; adding water to the stirred raw materials of the road mixed material and stirring again. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a flow chart of a method for directly entering a warehouse by a roller compacted concrete dam transport vehicle according to an embodiment of the present invention.

[0016] Figure 2 It is a schematic structural diagram of a cemented gravel road and a roller compacted concrete dam according to an embodiment of the present invention.

[0017] Figure 3 It is a schematic diagram of the plan structure of a cemented gravel road and a roller compacted concrete dam according to an embodiment of the present invention.

[0018] Figure 4 It is a longitudinal section view of a cemented gravel road and a roller compacted concrete dam according to an embodiment of the present invention.

[0019] Figure 5 It is a cross-sectional view of a storage bin to be poured of a roller compacted concrete dam according to an embodiment of the present invention.

[0020] Figure 6It is a cross-sectional view of a cemented gravel road and a supporting formwork according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 1. Cast warehouse; 2. Warehouse to be cast; 21. Elevation of the top of the warehouse to be cast; 22. Elevation of the bottom of the warehouse to be cast; 23. One layer of the dam body; 3. Downstream side of the dam body; 4. Extension; 5. Cutting seam; 6. Self-bonding area; 61. First slope consolidation area; 62. Second slope consolidation area; 63. One layer of cemented gravel road; 7. Bank slope edge line; 8. Bank slope; 9. Support formwork. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] This embodiment is explained by taking the cemented gravel road into the warehouse at the rear of the warehouse dam 11~21# dam section EL1673.00~1681.0 on the left bank of a roller compacted concrete dam as an example. Figure 4 and Figure 5 As shown, the bottom elevation of the second bin to be poured is EL1673.00, the top elevation of the second bin to be poured is EL1681.00, and the maximum bin area is 10134m 2 , concrete volume 82,000 m 3 At EL1673.00m~1681.00m behind the dam, a cemented gravel road is arranged as the dam body rises to directly enter the warehouse.

[0025] Specifically, in this embodiment, Figures 1 to 4 As shown, the method for direct entry of roller compacted concrete dam transport vehicles into the warehouse includes the following steps:

[0026] S100, construct a cemented gravel road with a preset layer thickness on the side of the bank slope 8 downstream of the roller compacted concrete dam.

[0027] S200, transport vehicles transport the RCC dam raw materials into the warehouse via the cemented gravel road.

[0028] S300, construct the dam body of the roller compacted concrete dam with a preset layer thickness, and alternately construct the cemented gravel road and the dam body with a preset layer thickness to a preset height.

[0029] For example, the transport vehicle is a dump truck, and the dump truck can be convenient for unloading. Of course, the transport vehicle can also be set to other forms as required, which is not restricted here.

[0030] Specifically, the alternate construction of the cemented gravel road and the dam body with a preset layer thickness to a preset height means that a cemented gravel road with a preset layer thickness is first constructed, and then the cemented gravel road is used to construct a dam body with a preset layer thickness, and then the above steps are repeated to construct a cemented gravel road with a preset layer thickness, and then the dam body with a preset layer thickness is constructed, and the cemented gravel road and the dam body are alternately constructed in this way until the construction of the dam body is completed.

[0031] For example, the width of the cemented gravel road may be 8 m. The width of the cemented gravel road may be set according to actual needs and is not limited here.

[0032] It is understandable that a cemented gravel road is constructed on the side of the downstream slope 8 of the roller-compacted concrete dam. The cemented gravel road has cementation properties, does not require the use of reinforced gabion footing, does not require a long period of casting, and the cemented gravel road rises synchronously with the rise of the dam body. Transport vehicles can be directly transported into the warehouse through the cemented gravel road, and there is no need to use a steel trestle across the warehouse, which improves construction efficiency and saves costs.

[0033] In this embodiment, the preset layer thickness is 27 cm to 33 cm.

[0034] For example, the preset layer thickness may be 27 cm, 28 cm, 29 cm, 30 cm, 31 cm, 32 cm or 33 cm, etc. The specific thickness of the preset layer thickness may be selected as needed and is not limited here.

[0035] It should be noted that the preset layer thickness is the compacted layer thickness after rolling. The thickness when loosely laid is about 32cm to 38cm. For example, when the thickness when loosely laid is about 32cm, the thickness after rolling is 27cm; when the thickness when loosely laid is 38cm, the thickness after rolling is 35cm.

[0036] When the preset layer thickness is too thin, it is not conducive to improving production efficiency. When the preset layer thickness is too thick, it is not conducive to improving the quality of the dam body and the quality of the cemented gravel road. In this embodiment, the preset layer thickness is set to 27cm~33cm, which is conducive to improving construction efficiency while ensuring quality.

[0037] In this embodiment, if Figures 2 to 5 As shown, the method for direct entry of roller compacted concrete dam transport vehicles into the warehouse also includes the following steps: constructing a cut 5 between the cemented gravel road and the dam body.

[0038] Specifically, the thickness of the cut slit 5 is consistent with the preset layer thickness, and the cemented gravel road and the dam body are separated by the cut slit 5. The cut slit 5 can be cut by a cutter 5 machine.

[0039] It is understandable that by setting the cut 5 between the cemented gravel and the dam body, it is possible to avoid damage to the dam body caused by the rolled cemented gravel road or stress concentration caused by factors such as temperature changes and foundation settlement, thereby affecting the quality of the dam body.

[0040] In this embodiment, the method for directly entering the warehouse by a roller compacted concrete dam transport vehicle further includes the following steps: inserting a filler (not shown in the figure) into the cut slit 5 .

[0041] For example, the filler can be a double-layer color striped cloth. Of course, the filler can also be selected in other forms, which are not limited here. Further, after the filler is filled in the slit 5, the slit is rolled to improve the quality and strength of the slit 5.

[0042] It can be understood that after the dam body and the cemented gravel road are separated by the cut 5, the cut 5 is filled with fillers, which can absorb and disperse external vibrations and impacts, reduce water seepage, and help to increase the service life of the dam body.

[0043] In this embodiment, one side of the dam body adjacent to the cemented gravel road extends 1m to 2m in the direction toward the cemented gravel road.

[0044] Specifically, Figures 2 to 4 As shown, one side of the dam body adjacent to the cemented gravel road, i.e., the downstream side 3 of the dam body, extends toward the cemented gravel road to form an extension portion 4. For example, the length of the extension portion 4 may be 1 m, 1.2 m, 1.5 m, 1.8 m or 2 m, etc. The length of the dam body extending toward the cemented gravel road may be selected according to actual conditions and is not limited here.

[0045] It is understandable that since the strength of the dam body itself is higher than that of the cemented gravel road, by extending the length of the dam body itself, when damage occurs at the joint between the dam body and the cemented gravel road, it will not affect the quality of the interior of the dam body, which is conducive to ensuring the overall quality.

[0046] In this embodiment, if Figure 4 and Figure 6 As shown, the construction method of cemented gravel road includes the following steps:

[0047] S110, installing a supporting formwork 9 on a side of the corresponding cemented gravel roadbed away from the bank slope 8.

[0048] Specifically, the support formwork 9 is a vertical formwork. The large surface of the support formwork 9 can adopt a 3.0m×3.0m cantilever formwork. The support formwork 9 is hoisted mainly by a 30t cable crane and a TC7035B fixed tower crane. The specific hoisting method is a conventional existing technology and will not be described in detail here. Furthermore, the support formwork 9 is partially filled with wooden formwork, and the foundation is fixed with a drawing bar. Before erecting the formwork, the operator releases the control points according to the drawings, and the formwork is erected strictly according to the measured and laid-out points. Control points are set for important structures. The position of the support formwork 9 is checked during the erection process, and any deviation is immediately corrected to ensure that the deviation of the installation of the support formwork 9 meets the requirements of the specifications. When the support formwork 9 is installed, the joints are smooth and smooth, without misalignment, the local unevenness of the formwork is less than 2mm, the gap between the board surface is not more than 2mm, and the release agent is evenly applied. When it exceeds the specified value, it is corrected or caulking is performed to prevent leakage, which is conducive to ensuring the appearance quality.

[0049] S120, pouring road mix.

[0050] In detail, before pouring the road mixture material, it is necessary to prepare the raw materials of the road mixture material. The raw materials of the road mixture material include water, cement, sand and gravel, water reducing agent, etc. The specific composition and proportion of the raw materials of the road mixture material are conventional existing technologies and will not be described in detail here. Sand and gravel are measured by the dump truck weighing mass method, and can also be measured by the excavator bucket volume method. Cement is measured by bag weight, and mixing water is measured by a water meter. The raw materials of the road mixture material need to be mixed before pouring.

[0051] Furthermore, the road mixed material is transported to the unloading area by dump trucks. The unloading at the cemented gravel road bin adopts the two-point unloading method, that is, the dump truck starts unloading after driving onto the strip, and after unloading half of the material, it moves forward about 2m to 4m without closing the bucket door to continue unloading. At the same time, it is required that the starting strip material pile position of each layer is 5 to 6m away from the end and 1.5m away from the side support formwork 9 to avoid the support formwork 9 from moving and affecting the pouring quality.

[0052] S130, unwinding the road mixed material.

[0053] Arrange the unloading according to the progress of the dam construction to ensure that it rises synchronously with the RCC dam, that is, the thickness of the cemented gravel road is consistent with the rising layer of the dam. After the unloading is completed, a leveling machine is used for leveling. After leveling, the surface of the road mixed material should be flat.

[0054] S140, compacting the road mixed raw materials.

[0055] By compacting the mixed raw materials, the roadbed materials of cemented gravel roads can reach the density and stability required by the design.

[0056] In this embodiment, the width direction of the cemented gravel road is divided into a slope consolidation area, a self-cementation area 6 and a slope consolidation area, that is, Figure 2 and Figure 3 The first slope consolidation area 61, the self-bonding area 6 and the second slope consolidation area 62 are poured separately.

[0057] Specifically, the road mixture material in the slope consolidation area is modified cemented gravel, and the road mixture material in the self-cementation area 6 is cemented gravel concrete. When unloading, a dividing line is drawn on the bin surface of the cemented gravel road, and the modified cemented gravel is unloaded to the slope consolidation area, and the modified cemented gravel is unloaded to the self-cementation area 6, and the strip unloading is convenient for paving and rolling the self-cementation area 6 and vibrating the slope consolidation area.

[0058] It can be understood that the cemented gravel road is divided into a slope consolidation area, a self-cementation area 6 and a slope consolidation area in the width direction of the cemented gravel road. By setting slope consolidation areas on both sides of the cemented gravel road, the cemented gravel road can be better integrated with the slope surface, which is beneficial to improving the overall strength of the cemented gravel road.

[0059] In this embodiment, the step of compacting the road mixed raw material includes:

[0060] S141, rolling the road mixed raw materials in the self-bonding area 6.

[0061] Specifically, the paved area is compacted by an intelligent roller, using a 25t double steel wheel roller for two static rolling and six vibratory rolling, with the rolling speed controlled at 1.5km / h to 2.0km / h. Of course, the rolling equipment, rolling speed and rolling method can be adjusted according to actual conditions and are not limited here.

[0062] S142, vibrate the road mixed raw materials in the slope consolidation area.

[0063] Specifically, after the abnormal cemented gravel in the slope consolidation area is slurried, a vibrator should be used for vibrating in a timely manner. The vibrator should be inserted quickly and withdrawn slowly until the slurry is overflowing and there is no surface settlement. For example, a vibrator of φ130 or φ100 can be used. The specifications of the vibrator can be selected according to needs and are not limited here.

[0064] It can be understood that by vibrating the road mixed raw materials in the slope fixing area, air bubbles in the road mixed raw materials can be eliminated, making the road mixed raw materials denser, ensuring the consistency of internal material performance, and increasing the bonding force between particles to improve the overall strength. Vibrating the road mixed raw materials in the slope fixing area facilitates controlling the boundaries of the slope fixing area.

[0065] In this embodiment, the width of the slope consolidation area is 0.5m to 1m in the width direction of the cemented gravel road.

[0066] For example, the width of the slope consolidation area can be 0.5m, 0.7m, 0.8m or 1m. If the width of the slope consolidation area is too narrow, it will not be conducive to improving the bonding strength between the cemented gravel road and the slope surface. If the width of the slope consolidation area is too wide, it will increase the construction cost.

[0067] In this embodiment, by setting the width of the slope consolidation area to 0.5m-1m, the construction cost can be controlled while the bonding between the cemented gravel road and the slope surface can be better, thereby improving the stability of the cemented gravel road.

[0068] In this embodiment, before pouring the road mixed material, the construction method of cemented gravel road further includes the following steps: mixing the raw materials of the road mixed material. The mixing process includes the following steps: laying the first layer of gravel material; removing large stones exceeding the preset particle size; spreading the first layer of cement and water reducing agent; laying the second layer of gravel material; removing large stones exceeding the preset particle size; spreading the second layer of cement and water reducing agent; stirring the raw materials of the road mixed material; adding water to the stirred raw materials of the road mixed material and stirring again.

[0069] For example, the particle size of the gravel can be about 50 cm, and the raw materials of the road mixture can be stirred by an excavator. Further, the raw materials of the road mixture can be stirred twice during the first stirring, and can be stirred four times during the second stirring.

[0070] It can be understood that mixing and spreading the road mixed materials in layers can make the raw materials more evenly distributed, facilitate subsequent mixing, and help improve the mixing efficiency and mixing quality.

[0071] In this embodiment, the construction method of the cemented gravel road includes the following steps: removing the supporting formwork 9 and maintaining the cemented gravel road.

[0072] It should be noted that when the strength of the cemented gravel road reaches the standard, the supporting formwork 9 will be removed, and surface watering maintenance will be started within 6 to 18 hours after removal, which is beneficial to prolonging the service life.

[0073] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0077] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for direct entry of roller compacted concrete dam transport vehicles into a warehouse, characterized in that: The steps include: Construct a cemented gravel road with a preset layer thickness on the downstream side of the RCC dam; The transport vehicle transports the raw materials of the roller compacted concrete dam into the warehouse via the cemented gravel road; The dam body of the roller compacted concrete dam is constructed with the preset layer thickness, and the cemented gravel road and the dam body are alternately constructed with the preset layer thickness to a preset height.

2. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 1, characterized in that: The method also includes the following steps: constructing a cut between the cemented gravel road and the dam body.

3. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 2, characterized in that: The method also includes the following step: embedding a filler into the slit.

4. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 1, characterized in that: A side of the dam body adjacent to the cemented gravel road extends 1m to 2m in a direction toward the cemented gravel road.

5. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 1, characterized in that: The preset layer thickness is 27 cm to 33 cm.

6. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 1, characterized in that: The construction method of the cemented gravel road comprises the following steps: Install a support formwork on the side of the cemented gravel roadbed away from the bank slope; pouring of road mix; Squaring the road mixture material; The road mix raw material is compacted.

7. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 6, characterized in that: The bonded gravel road is divided into a slope consolidation area, a self-bonding area and a slope consolidation area in sequence in the width direction, and the road mixed materials in the slope consolidation area and the self-bonding area are poured separately.

8. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 7, characterized in that: The step of compacting the road mixed raw material comprises: rolling the road mixed raw material in the self-bonding area; and vibrating the road mixed raw material in the slope consolidation area.

9. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 7, characterized in that: In the width direction of the cemented gravel road, the width of the slope consolidation area is 0.5m to 1m.

10. The method for direct entry of roller compacted concrete dam transport vehicles into a warehouse according to claim 6, characterized in that: Before pouring the road mixed material, the construction method of the cemented gravel road also includes the following steps: The raw materials of the road mixture are mixed, and the mixing process includes the following steps: Lay the first layer of gravel; Remove large stones exceeding the preset particle size; Spread the first layer of cement and water reducing agent; Lay the second layer of gravel; Remove large stones exceeding the preset particle size; Spread the second layer of cement and water reducing agent; Stirring the raw materials of the road mixture material; Water is added to the stirred raw material of the road mixture and stirred again.

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