Gradual track-drawing formwork for overflow surface concrete lining and its construction method

Abstract

The present invention provides a gradual change rail-type drawing form for overflow surface concrete lining and a construction method thereof, wherein the rail-type drawing form comprises a template system, the template system comprises a first template and a second template, the first template and the second template are connected by a slideway, a guide rail is arranged on the gate pier, the ends of the first template and the second template are matched with the guide rail by a sliding shoe, and the template system is lifted by a lifting system. The rail-type drawing form and the construction method can realize the construction of the rail-type drawing form for the construction of overflow surface concrete of unequal width, and realize continuous construction.

Description

Technical Field

[0001] The invention relates to the construction field of reservoir overflow surface concrete lining, and in particular to a gradual change rail drawing die for overflow surface concrete lining and a construction method thereof. Background Art

[0002] At present, tracked formwork is usually used for concrete lining of overflow surface with equal width, which can ensure the safety, quality and progress of construction. For concrete lining of overflow surface with varying width, methods such as supporting formwork casting or tracked formwork in batches are often adopted. However, the more prominent disadvantages of the existing technology are:

[0003] When adopting the formwork casting scheme, the construction procedures are cumbersome, resources are required, the project cost is high, the construction progress is slow, quality defects are prone to occur on the surface, and it is impossible to repair and maintain it in time.

[0004] When adopting the scheme of multi-stage track drawing, it is necessary to install and remove the drawing track many times, which invisibly increases the construction period and increases the cost.

[0005] The above two concrete lining schemes both require a large number of concrete construction joints, which increases the amount of concrete jointing and sealing work while increasing the risks of quality and cost control.

[0006] In summary, providing a gradual construction device and method for a variable width overflow surface with a simple structure, easy installation and disassembly, reduced joints, continuous construction, the ability to intuitively monitor the concrete lining process, and timely maintain and repair concrete construction defects has become an urgent problem to be solved by engineering and technical personnel in this field. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a gradual track-drawing formwork for overflow surface concrete lining and a construction method thereof, which can realize the track-drawing formwork construction of overflow surface concrete of unequal width and realize continuous construction.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a gradual track-drawing formwork for overflow surface concrete lining, including a formwork system, the formwork system includes a first formwork and a second formwork, the first formwork and the second formwork are connected by a slide, a guide rail is provided on the gate pier, the ends of the first formwork and the second formwork are matched with the guide rail through a sliding shoe, and the formwork system is lifted by a lifting system.

[0009] In a preferred solution, the slideway includes channel steels respectively arranged at the bottom of the first template and the top of the second template, and the two channel steels are buckled.

[0010] In a preferred solution, the lifting system includes a jack arranged on the template system, the jack is connected to the top of the overflow surface through a pull rod, and a synchronizer is provided on the pull rod.

[0011] In a preferred solution, the first template and the second template are provided with fall chains.

[0012] In a preferred solution, an auxiliary plate is suspended at the bottom of the formwork system.

[0013] In a further solution, a watering pipe is provided on the auxiliary plate.

[0014] In a preferred solution, one side of the guide rail is provided with a dowel bar, and the dowel bar is inserted into the gate pier.

[0015] The preferred solution also includes a concrete feeding system, which includes a receiving hopper arranged on the top of the overflow surface, a chute is arranged at the bottom of the receiving hopper, a distribution trough is arranged at the lower end of the chute, and the lower end of the distribution trough is arranged at XXX position.

[0016] A construction method of a gradual change rail-type drawing form for overflow surface concrete lining comprises the following steps:

[0017] Step 1: Template installation: Use a lifting device to lift the first template and the second template to the sliding position at the lower end of the overflow surface, and insert the sliding shoes at the ends of the first template and the second template into the guide rails;

[0018] Step 2: Install the jack and the pull rod. After installation, perform a no-load test.

[0019] Step 3: Install the concrete conveying system, including the receiving hopper, chute and distribution chute;

[0020] Step 4: Install steel bars: build steel bars on the overflow surface;

[0021] Step 5: Concrete construction: Concrete is transported to the receiving hopper at the top of the overflow surface, symmetrically enters the warehouse through the chute and the distribution trough, and is vibrated evenly in layers using a vibrating rod;

[0022] Step 6: Sliding formwork ascends, using layered casting. During the ascending process of the formwork system, the first formwork and the second formwork slide relative to each other to adjust the overall width of the formwork system, and realize the gradual change function in the horizontal direction;

[0023] Step 7. After demoulding, the concrete should be repaired with original slurry in time, and it should be smooth, uniform and flat.

[0024] In the preferred scheme, in the step six, a 10 cm thick semi-aggregate concrete or mortar is poured for the first time; then a second layer of concrete is poured according to a layered thickness of no more than 30 cm; when the third layer of concrete is poured and the thickness reaches 70 cm, it starts to slide 3 to 6 cm; after the fourth layer is poured, it slides 6 cm; after the fifth layer is poured, it slides 12 cm to 15 cm; after the sixth layer is poured, it slides 20 cm. If there is no abnormality, normal pouring and sliding can be carried out.

[0025] The invention provides a gradual change rail drawing form for overflow surface concrete lining and a construction method thereof, which has the following beneficial effects:

[0026] 1. The structure is simple, installation and disassembly is convenient, the labor organization is simple, and the cumbersome procedures of template installation and disassembly, construction joints, etc. are reduced. The project cost is low, the construction speed is fast, and the continuous construction of concrete is guaranteed.

[0027] 2. The concrete construction process is intuitive and controllable. The concrete loading, leveling, and vibration are all carried out within a certain range on the upper edge of the formwork. It is easy to operate and easy to control, and can fully ensure uniform loading, layered leveling, and dense vibration, which is beneficial to the intrinsic quality of the concrete.

[0028] 3. Demolding complies with the concrete strength pouring rules, and there are no construction joints. After demoulding, the concrete pouring quality can be checked in time, and surface defects can be dealt with in time, which can ensure both surface quality and surface beauty.

[0029] 4. The template is multifunctional. After completing the variable width gradual die drawing and fixing the two sections of the template, the die drawing construction of the overflow surface of the equal width section can be directly carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0031] Figure 1 It is a schematic plan view of the gradual change drawing die of the present invention;

[0032] Figure 2 It is a schematic diagram of the longitudinal section structure of the gradual change drawing die of the present invention;

[0033] Figure 3 is a structural schematic diagram of the slide;

[0034] In the figure: the first template 1, the second template 2, the slideway 3, the gate pier 4, the guide rail 5, the jack 6, the pull rod 7, the synchronizer 8, the fall chain 9, the auxiliary plate 10, the dowel 11, the receiving hopper 12, the chute 13, the distribution trough 14, and the channel steel 301. DETAILED DESCRIPTION

[0035] like Figure 1~2As shown, a gradual track-drawing formwork for overflow surface concrete lining includes a formwork system, the formwork system includes a first formwork 1 and a second formwork 2, the first formwork 1 and the second formwork 2 are composed of a panel, ribs, and supports, etc. The panel can be made of 6-9 mm thick steel plates or assembled with ordinary standard steel formworks, and ribbed with steel sections. The height of the formwork is generally about 1.5 meters, and the support is generally made of steel sections processed into a truss type to ensure sufficient strength and rigidity. The first formwork 1 and the second formwork 2 are connected by a slide 3, and a guide rail 5 is provided on the gate pier 4. Specifically, a dowel 11 is provided on one side of the guide rail 5, and the dowel 11 is inserted into the gate pier 4. The guide rail 5 is processed with steel sections (angle steel or channel steel) to be consistent with the design curve of the overflow surface, and is fixed to the gate pier 4 with the dowel 11. The ends of the first formwork 1 and the second formwork 2 are matched with the guide rail 5 through sliding shoes, and the formwork system is lifted by the lifting system.

[0036] The lifting system includes a jack 6 arranged on the template system. The jack is a special tool controlled by a hydraulic system. Currently, the most commonly used one is the large-tonnage HM-100 type hydraulic special jack. The jack 6 is connected to the top of the overflow surface through a pull rod 7.

[0037] like Figure 3 As shown, the slideway 3 includes channel steels 301 respectively arranged at the bottom of the first template 1 and the top of the second template 2. The two channel steels 301 are interlocked, and the channel steels 301 can also be replaced by angle steels.

[0038] Preferably, the pull rod 7 is provided with a synchronizer 8. The synchronizer 8 is a synchronization device of the jack 6, fixed on the pull rod 7 above the jack 6, and synchronously controls the jack 6 in a timely manner to ensure that the template slides evenly along the guide rail 5.

[0039] The first template 1 and the second template 2 are provided with a fall chain 9. The fall chain 9 is a standard tool, which provides auxiliary power for the drawing die to realize the gradual change function.

[0040] Preferably, an auxiliary plate 10 is suspended at the bottom of the formwork system. This facilitates manual repair of concrete quality defects on the auxiliary plate 10 after demoulding.

[0041] A watering pipe is provided on the auxiliary plate 10 and is arranged on the lower side of the formwork to ensure that the concrete reaching the initial setting strength is watered and cured in time.

[0042] Preferably, it also includes a concrete conveying system, which includes a receiving hopper 12 arranged on the top of the overflow surface, a chute 13 is provided at the bottom of the receiving hopper 12, a distribution trough 14 is provided at the lower end of the chute 13, and the lower end of the distribution trough 14 is arranged above the concrete pouring surface below the first formwork 1 and the second formwork 2.

[0043] The chute 13 is a steel plate trough arranged in sections, each section of the steel plate trough is 0.5m long, and the sections are connected by bolts or buckles, so that the length of the chute 13 can be adjusted according to the change of the pouring height, which is convenient for the concrete material to enter the warehouse.

[0044] During specific use, the first template 1 and the second template 2 move upward along the guide rail 5 to realize die drawing. Since the first template 1 and the second template 2 are staggered and arranged through the slideway, the first template 1 and the second template 2 can slide relative to each other, so that the relative position between the first template 1 and the second template 2 is adjusted according to the change in width, thereby realizing a gradual function as the width of the overflow surface changes.

[0045] A construction method of a gradual change rail-type drawing form for overflow surface concrete lining comprises the following steps:

[0046] Step 1, template production: It is manufactured in the manufacturing workshop according to the design requirements. Generally, it is set to two sections of templates, namely the first template 1 and the second template 2. In order to ensure that the total width between the first template 1 and the second template 2 can change gradually during the sliding process, a slide 3 is provided between the first template 1 and the second template 2 so that they can slide relative to each other.

[0047] Guide rail manufacturing and installation: The guide rails are manufactured and numbered in sections according to the overflow surface curve in the manufacturing workshop, and the sections are connected by sockets to ensure smooth connections; the guide rail installation position is measured and marked on the gate pier 4 at the construction site, and the guide rail 5 is installed on the gate pier 4 with dowels 11.

[0048] During the template installation, the first template 1 and the second template 2 are hoisted to the sliding position at the lower end of the overflow surface by a hoisting device, and the sliding shoes at the ends of the first template 1 and the second template 2 are inserted into the guide rail 5.

[0049] Step 2: Install the jack 6 and the pull rod 7, arrange the auxiliary plate 10 and the fall chain 9, and after the installation is completed, perform a no-load test.

[0050] Step 3: After the debugging is completed, the concrete conveying system is installed, and the receiving hopper 12, the chute 13 and the distribution chute 14 are installed.

[0051] Step 4: Install steel bars. Build steel bars on the overflow surface. The steel bars can be installed all at once in advance or simultaneously with the concrete pouring. It is recommended to install them all at once in advance.

[0052] Step 5: Concrete construction: Concrete is transported to the receiving hopper 12 at the top of the overflow surface, symmetrically enters the warehouse through the chute 13 and the distribution trough 14, and is vibrated evenly in layers using a vibrating rod;

[0053] Step 6: Slip formwork and rise, using layered pouring. The first pour is 10cm thick semi-aggregate concrete or mortar; then pour the second layer of concrete with a layer thickness of no more than 30cm; pour the third layer of concrete, when the thickness reaches 70cm, start to slide 3-6cm, and check whether the demoulding concrete strength is appropriate; after pouring the fourth layer, slide 6cm; continue to pour the fifth layer and slide 12cm-15cm; after pouring the sixth layer, slide 20cm. If there is no abnormality, normal pouring and sliding can be carried out.

[0054] Concrete pouring adopts layered symmetrical pouring, and the layer thickness is not more than 30cm. The initial sliding of the slipform should be carried out slowly, and in this process, the hydraulic device, formwork structure and related facilities should be fully and systematically checked under load, and problems should be found and dealt with in time. Normal sliding can only be carried out after everything is normal. When the construction is transferred to normal sliding, continuous operation should be maintained as much as possible, and a dedicated person should observe the surface quality of the demoulding concrete to determine the appropriate sliding time and sliding speed. The normal daily sliding is about 10m, which needs to be determined based on comprehensive tests such as concrete characteristics, feed strength, ambient temperature, and demoulding strength.

[0055] During normal sliding, the template is adjusted at any time using the fall chain 9 to ensure a gradual change in the lateral direction so as to be consistent with the overflow surface width; after the variable width overflow surface is drawn, the first template 1 and the second template 2 can be fixed together to complete the construction of the equal width overflow surface concrete.

[0056] Step 7: After demoulding, the concrete should be repaired in time with original paste, which requires smoothness, uniformity and flatness. In order to make the demoulding concrete surface have suitable hardening conditions and prevent cracks, a sprinkler pipe is set on the auxiliary plate 10, and a curing agent can also be used to timely maintain the demoulding concrete surface.

[0057] The gradual change rail drawing formwork for overflow surface concrete lining and the construction method thereof have the following beneficial effects:

[0058] 1. The structure is simple, installation and disassembly is convenient, the labor organization is simple, and the cumbersome procedures of template installation and disassembly, construction joints, etc. are reduced. The project cost is low, the construction speed is fast, and the continuous construction of concrete is guaranteed.

[0059] 2. The concrete construction process is intuitive and controllable. The concrete loading, leveling, and vibration are all carried out within a certain range on the upper edge of the formwork. It is easy to operate and easy to control, and can fully ensure uniform loading, layered leveling, and dense vibration, which is beneficial to the intrinsic quality of the concrete.

[0060] 3. Demolding complies with the concrete strength pouring rules, and there are no construction joints. The demoulding strength of concrete is controlled at 0.1-0.3MPa, and it is still in the initial setting period. After demoulding, the concrete pouring quality can be checked in time, and surface defects can be dealt with in time, which can ensure both surface quality and surface beauty; watering maintenance is carried out on the auxiliary plate in a timely, continuous and uniform manner, which is also conducive to ensuring concrete strength.

[0061] 4. The template is multifunctional. After completing the variable width gradual die drawing and fixing the two sections of the template, the die drawing construction of the overflow surface of the equal width section can be directly carried out.

Claims

1. A gradual change rail drawing die for overflow surface concrete lining, characterized in that: The template system comprises a first template (1) and a second template (2), the first template (1) and the second template (2) are connected by a slideway (3), a guide rail (5) is provided on a gate pier (4), the ends of the first template (1) and the second template (2) are matched with the guide rail (5) by means of a sliding shoe, the template system is lifted by a lifting system, the slideway (3) comprises channel steels (301) respectively arranged at the bottom of the first template (1) and the top of the second template (2), the two channel steels (301) are buckled, and a fall chain (9) is provided on the first template (1) and the second template (2).

2. The gradual change rail drawing form for overflow surface concrete lining according to claim 1 is characterized in that: The lifting system comprises a jack (6) arranged on the template system, the jack (6) being connected to the top of the overflow surface via a pull rod (7), and a synchronizer (8) being provided on the pull rod (7).

3. The gradual change rail drawing form for overflow surface concrete lining according to claim 1 is characterized in that: The template system has a bottom suspension auxiliary plate (10).

4. The gradual change rail drawing form for overflow surface concrete lining according to claim 3 is characterized in that: The auxiliary plate (10) is provided with a watering pipe.

5. The gradual change rail drawing form for overflow surface concrete lining according to claim 1 is characterized in that: A dowel bar (11) is provided on one side of the guide rail (5), and the dowel bar (11) is inserted into the gate pier (4).

6. The gradual change rail drawing form for overflow surface concrete lining according to claim 1 is characterized in that: It also includes a concrete conveying system, which includes a receiving hopper (12) arranged on the top of the overflow surface, a chute (13) provided at the bottom of the receiving hopper (12), a distribution trough (14) provided at the lower end of the chute (13), and a lower end of the distribution trough (14) arranged above the concrete pouring surface.

7. The construction method of a gradual change rail drawing form for overflow surface concrete lining according to claim 1 is characterized in that: The steps include: Step 1: installing the template, using a lifting device to lift the first template (1) and the second template (2) to the sliding position at the lower end of the overflow surface, and the sliding shoes at the ends of the first template (1) and the second template (2) are inserted into the guide rail (5); Step 2: Install the jack (6) and the pull rod (7). After installation, perform a no-load test; Step 3: Install the concrete conveying system, including installing the receiving hopper (12), the chute (13) and the distribution trough (14); Step 4: Install steel bars: build steel bars on the overflow surface; Step 5: Concrete construction: Concrete is transported to the receiving hopper (12) at the top of the overflow surface, symmetrically enters the warehouse through the chute (13) and the distribution trough (14), and is vibrated evenly in layers using a vibrating rod; Step 6: Sliding formwork ascends, using layered casting. During the ascending process of the formwork system, the first formwork (1) and the second formwork (2) slide relative to each other to adjust the overall width of the formwork system, thereby realizing a gradual change function in the horizontal direction; Step 7. After demoulding, the concrete should be repaired with original slurry in time, and it should be smooth, uniform and flat.

8. The construction method of a gradual change rail formwork for overflow surface concrete lining according to claim 7 is characterized in that: In the step six, a 10 cm thick semi-aggregate concrete or mortar is poured for the first time; then a second layer of concrete is poured with a layer thickness of no more than 30 cm; when the third layer of concrete is poured and the thickness reaches 70 cm, it starts to slide 3 to 6 cm; after the fourth layer is poured, it slides 6 cm; after the fifth layer is poured, it slides 12 cm to 15 cm; after the sixth layer is poured, it slides 20 cm. If there is no abnormality, normal pouring and sliding can be carried out.

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