Small-section trapezoidal channel slip-form construction device

Abstract

The utility model provides a slip-form construction device for a small-section trapezoidal channel. The slip-form construction device comprises a slope crest base, a lifting mechanism, a movable side form, a sliding template, a vibrator and a traction rope, the slope crest base is used for being installed on the slope crest of a channel and serves as an installation foundation of the lifting mechanism. The sliding formwork is connected to the action end of the lifting mechanism through a traction rope, the movable side formworks are used for being laid on the trapezoidal face of the channel, the two ends of the sliding formwork are supported on the movable side formworks to form walking rails of the sliding formwork, and the thickness of the movable side formworks is consistent with the pouring thickness. And the vibrator is mounted on the back surface of the sliding template. The device has the advantages that the construction efficiency is guaranteed, materials can be prepared and supplied outside the channel, and internal and external cooperation is more coordinated.

Description

Technical Field

[0001] The utility model relates to the technical field of channel construction, in particular to a small-section trapezoidal channel slipform construction device. Background Art

[0002] At present, the more advanced trapezoidal open channel lining construction methods at home and abroad mostly use two methods: sliding film slope paver and component steel mold trolley.

[0003] The advantage of slope paver construction is that it can be formed in one go, which greatly reduces the construction time of slope lining and improves construction efficiency. The disadvantage is that it needs to be customized according to the channel slope, which requires a large cost investment. Therefore, it is generally only suitable for large-section channels with large engineering volume and long slopes. The longer the slope, the higher the construction efficiency.

[0004] The investment cost of the component steel mold trolley is high, it cannot be deployed on multiple working surfaces, and the movement in the turning section is greatly restricted.

[0005] Based on the above cost constraints, the construction coverage of small-section trapezoidal channels is insufficient, which affects the construction efficiency of small-section trapezoidal channels.

[0006] To solve this problem, there are existing technologies such as CN202223321229.4_A channel slipform device, which uses a general-purpose excavator and other equipment to transform the working end, so that the excavator and other engineering vehicles can enter the channel to construct the slopes on both sides.

[0007] However, this method of entering the channel for construction requires that the bottom of the channel meet driving requirements, and most of the materials are prepared outside the channel, which lacks coordination with the vehicles inside the channel and still has certain constraints.

[0008] Therefore, it is necessary to design a device which is convenient for supplying materials outside the channel and is specially used for the construction of small-section trapezoidal channels to solve the above problems. Utility Model Content

[0009] The utility model aims to address the deficiencies of the prior art, thereby providing a small-section trapezoidal channel slipform construction device with guaranteed construction efficiency, capable of preparing and feeding materials outside the channel, and more coordinated internal and external coordination.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a small-section trapezoidal channel slipform construction device, including a slope top base, a lifting mechanism, a movable side form, a sliding formwork, a vibrator and a traction rope;

[0011] The slope top base is used to be installed on the slope top of the channel as the installation foundation of the lifting mechanism;

[0012] The sliding template is connected to the action end of the lifting mechanism through a traction rope, the movable side template is used to be laid on the trapezoidal surface of the channel, the two ends of the sliding template are supported on the movable side template to form a walking track of the sliding template, and the thickness of the movable side template is consistent with the casting thickness;

[0013] The vibrator is installed on the back side of the sliding formwork.

[0014] Preferably, the lifting mechanism is an electric hoist or a winch.

[0015] Preferably, the sliding formwork is assembled from a steel plate and aluminum alloy square steel, the steel plate serves as a bottom lining of the sliding formwork, and the aluminum alloy square steel is fixed to the top surface of the steel plate to support the steel plate.

[0016] Preferably, the aluminum alloy square steel forms a support beam frame by staggering horizontally and vertically.

[0017] Preferably, a plurality of diagonal bracing beams are also provided in the formed supporting beam frame.

[0018] Preferably, the movable side formwork is a square timber structure.

[0019] Preferably, at least two vibrators are installed on the top surface of the sliding formwork, and the two vibrators are symmetrically distributed on the top surface of the sliding formwork in the horizontal direction.

[0020] Preferably, the thickness of the steel plate is ≥2 cm.

[0021] Preferably, the slope top base includes a fixed column, and the lifting mechanism is fixed on the fixed column.

[0022] Preferably, the slope top base includes a horizontal slide rail, a fixed column is arranged on the horizontal slide rail, the direction of the horizontal slide rail is consistent with the direction of the channel, and the lifting mechanism is fixed on the fixed column.

[0023] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the overall structure of the utility model is simple, and is mainly composed of a self-made sliding template, a movable side template and a lifting mechanism. The sliding template and the movable side template can be prepared on site. The vibrator and the lifting mechanism are commonly used construction tools, and local materials can be used for construction. The construction operators are located at the top of the channel, which can be seamlessly connected with the slurry preparation process outside the channel. Only a small number of workers are needed at the bottom of the channel to observe emergencies, which effectively improves the construction speed and ensures the construction quality.

[0024] This device is particularly suitable for small-section trapezoidal channels and working conditions with many slope transition sections. Due to its independent design, template production, and easy-to-buy and cheap materials, it greatly reduces cost investment compared to the two types of construction: sliding film slope paver and component steel mold trolley. It can be deployed on multiple working surfaces, effectively improving the construction speed and ensuring the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a construction status diagram of a small-section trapezoidal channel slipform construction device in the utility model.

[0026] Figure 2 The utility model is a structural schematic diagram of a sliding template in a small-section trapezoidal channel sliding template construction device.

[0027] In the figure: 1. Slope top base; 2. Lifting mechanism; 3. Movable side formwork; 4. Sliding formwork; 5. Vibrator; 6. Traction rope; 7. Channel; 41. Steel plate; 42. Aluminum alloy square steel. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0029] like Figure 1 and Figure 2 As shown, a small-section trapezoidal channel slipform construction device includes a slope top base 1, a lifting mechanism 2, a movable side form 3, a sliding formwork 4, a vibrator 5 and a traction rope 6.

[0030] The slope top base 1 is used to be installed on the slope top of the channel 7 as the installation foundation of the lifting mechanism 2. In this embodiment, the slope top base 1 is designed as a fixed column, which is temporarily inserted into the ground at the current channel operation position and used as a pile body. After the transfer, it is pulled out and used in other workstations.

[0031] The sliding template 4 is connected to the action end of the lifting mechanism 2 through a traction rope 6. In this embodiment, the lifting mechanism is an electric hoist or a winch.

[0032] The movable side formwork 3 is used to be laid on the trapezoidal surface of the channel 7, and both ends of the sliding formwork 4 are supported on the movable side formwork 3 to form a walking track of the sliding formwork 4. The thickness of the movable side formwork 3 is consistent with the casting thickness;

[0033] The vibrators 5 are installed on the back of the sliding template 4, and the number is at least two. The two vibrators are symmetrically distributed on the top surface of the sliding template along the horizontal direction.

[0034] Specifically, in the present embodiment, the sliding formwork 4 is assembled from a steel plate 41 and an aluminum alloy square steel 42, wherein the steel plate 41 serves as the bottom lining of the sliding formwork 4, and the aluminum alloy square steel 42 is fixed to the top surface of the steel plate 41 for supporting the steel plate. The aluminum alloy square steel 42 forms a support beam frame by staggering horizontally and vertically, and a plurality of diagonal bracing beams are also arranged in the formed support beam frame, wherein the thickness of the steel plate 41 is ≥2 mm to ensure the structural strength, and the support beam frame and the diagonal bracing beams are mainly used to maintain the overall stability of the sliding formwork 4 without deformation, and have strong structural strength and weight; the movable side formwork 3 is a square timber structure, which can be temporarily prepared, assembled and manufactured according to the channel length and laying thickness, or a square timber structure of ready-made size can be purchased.

[0035] In a preferred embodiment, the slope top base includes a horizontal slide rail, a fixed column is arranged on the horizontal slide rail, the direction of the horizontal slide rail is consistent with the direction of the channel, and the lifting mechanism is fixed on the fixed column. It can switch between different construction stations on adjacent channel slopes by sliding. After the processing of this group of stations is completed, the entire horizontal slide rail is transferred to the next group of stations to continue construction.

[0036] The device was verified in the civil construction and installation project of the Xizi Canal Extension Section of the Pengxi Chuanshan Irrigation Project in Sichuan Province. The Xizi Canal Extension Section has a trapezoidal open channel with a total length of 735m and a design flow of 12.5m3 / s. The permanent stable slope of the channel is 1:0.75, and the slope is lined with 10cm thick C20 concrete, and the bottom plate is lined with 8cm thick C20 concrete. A split seam is set every 5m, and the seam width is 2cm. Due to the small, short and multi-section channel section, the project volume is small and it is not suitable for the construction of the sliding film slope paver.

[0037] The entire construction process includes:

[0038] Construction preparation

[0039] 1) Provide technical and safety technical briefings to construction and operating personnel entering the site.

[0040] 2) Determine the concrete mix ratio: In addition to meeting the design performance of the panel, the concrete mix ratio of the panel requires that the concrete has an appropriate setting time in order to ensure smooth sliding of the formwork; it should be convenient for chute transportation and there should be no stratification or segregation during transportation.

[0041] 3) Inspect and test the raw materials and equipment brought into the site to ensure smooth access to construction roads, water and electricity.

[0042] 2Template making and installation

[0043] 1) Installation of movable side formwork: Before installing the movable side formwork, the surveyors first measure the construction longitudinal seam edge lines at the upper and lower ends of the slope, and the construction workers install the movable side formwork according to the measured construction longitudinal seam edge lines. During the installation of the movable side formwork, mortar is used to level the areas where the over-excavation at the bottom of the movable side formwork is not serious, or wooden blocks are used to level the areas. The movable side formwork mainly uses square timber, and dowel bars are set on the slope surface inside and outside the movable side formwork. The dowel bars are inserted into the rock 10cm and exposed 5cm to fix the side formwork. Dowel bars are set according to actual conditions, and the spacing between dowel bars on the slope surface is generally 0.9m. If there are special circumstances, the number of dowel bars can be increased accordingly to fix the movable side formwork. After the movable side formwork is installed, measurement and calibration are carried out. The calibration error is within the specified allowable range before the next step of construction can be carried out.

[0044] 2) Sliding formwork production: The formwork frame and diagonal braces are welded with 8cm*8cm aluminum alloy square steel. Two 0.75KW attached vibrators are installed on the outside, and the inner panel is welded with 2mm steel plate and square steel.

[0045] 3) Sliding formwork installation: The self-made sliding formwork is hoisted into the channel by a 25T truck crane and placed in the middle of the side formwork. Both sides of the sliding formwork must be tightly connected to the side formwork.

[0046] 3. Chute erection and electric hoist traction system installation

[0047] 1) Chute construction: The lower part of the chute is cross-built with steel pipes to support the chute. The chute itself is assembled with wooden molds. Thin iron sheets are placed inside the assembled wooden molds. Holes are punched on the edges of the wooden molds and iron sheets to pass steel wires for fixing. The steel pipe frame must be firmly erected, and the thin iron sheets inside the chute must be smooth and smooth.

[0048] 2) Installation of electric hoist traction system: The sliding formwork is pulled by two 1.5t electric hoists. Their positions correspond to the longitudinal joints of the channel panel. A fixed steel pipe frame is set up on the bedrock, and a 1.5t electric hoist is placed on each of the fixed steel pipe frames at the corresponding longitudinal joints. The other end of the electric hoist is connected to the sliding formwork to achieve the purpose of transmission.

[0049] 4. Concrete pouring

[0050] Before pouring concrete, foundation treatment, elevation verification, formwork installation and other tasks must be completed, and the pouring work can only be carried out after the supervising engineer has been notified and accepted.

[0051] The cast-in-place concrete of the trapezoidal open channel is constructed with a self-made slipform and a skip-bin pouring method. The length of each bin is determined to be 5 m according to the designed expansion joint spacing width. The cast-in-place concrete is poured from bottom to top in one go, and the pouring sequence is to pour the channel bottom first, and then pour the channel body and the channel pressure top plate.

[0052] During the pouring of the channel panel, the concrete mix personnel will test the moisture content of the sand and gravel aggregates and promptly correct the amount of water added in the concrete mix ratio based on the moisture content of the aggregates, thereby controlling the slump of the concrete within 6cm to 8cm; combined with the deadweight of the sliding formwork and the small thickness of the channel panel lining, the buoyancy of the concrete can be controlled.

[0053] Pouring of channel panels: After the concrete is poured by the mixing station, it is transported to the construction site by a 12m³ concrete tanker and enters the warehouse through a chute. The channel panel is poured from bottom to top. During the pouring process, the attached vibrator is turned on and the D50 soft shaft vibrator is used manually for vibration. The vibration time is generally 60s. The vibration is stopped when the concrete surface no longer sinks significantly, no bubbles appear, and the slurry begins to overflow. After the concrete is initially set, the sliding formwork is moved upward along the fixed track of the side formwork by an electric hoist. After reaching the designated position, the channel panel is poured. After the initial setting is completed by vibration, the channel panel is poured upward in the same way, and the surface is manually smoothed before the concrete is finally set. After the concrete of one warehouse is poured, the skip warehouse method is adopted to skip the next warehouse and repeat the above operation at the third warehouse until the pouring of the channel side wall is completed.

[0054] The lifting height after concrete pouring is 60cm. The lifting speed of the sliding formwork is initially controlled at 0.6m / h to 0.8m / h. The lifting speed of the sliding formwork can be increased or decreased according to the concrete demoulding effect.

[0055] 5. Template removal

[0056] In the same construction surface, after the concrete solidifies, the sliding formwork is slid to the bottom of the channel, and the sliding formwork, side formwork and electric hoist traction system are manually disassembled and installed to the next warehouse channel panel.

[0057] 6 Concrete curing

[0058] Concrete curing adopts the covering and watering method to keep its surface moist at all times. The curing time is not less than 14 days. In dry and hot climates, the curing time is extended to more than 28 days.

[0059] Finally, it should be noted that: The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A small-section trapezoidal channel slipform construction device, characterized in that: It includes a slope top base, a lifting mechanism, a movable side form, a sliding form, a vibrator and a traction rope; The slope top base is used to be installed on the slope top of the channel as the installation foundation of the lifting mechanism; The sliding template is connected to the action end of the lifting mechanism through a traction rope, the movable side template is used to be laid on the trapezoidal surface of the channel, the two ends of the sliding template are supported on the movable side template to form a walking track of the sliding template, and the thickness of the movable side template is consistent with the casting thickness; The vibrator is installed on the back side of the sliding formwork.

2. The small-section trapezoidal channel slipform construction device according to claim 1 is characterized in that: The lifting mechanism is an electric hoist or a winch.

3. The small-section trapezoidal channel slipform construction device according to claim 2 is characterized in that: The sliding template is assembled from a steel plate and aluminum alloy square steel. The steel plate serves as the bottom lining of the sliding template, and the aluminum alloy square steel is fixed to the top surface of the steel plate to support the steel plate.

4. The small-section trapezoidal channel slipform construction device according to claim 3 is characterized by: The aluminum alloy square steels are staggered horizontally and vertically to form a support beam frame.

5. The small-section trapezoidal channel slipform construction device according to claim 4 is characterized in that: A number of diagonal bracing beams are also arranged in the formed supporting beam frame.

6. The small-section trapezoidal channel slipform construction device according to claim 5, characterized in that: The movable side formwork is a square timber structure.

7. The small-section trapezoidal channel slipform construction device according to claim 6, characterized in that: At least two vibrators are installed on the top surface of the sliding template, and the two vibrators are symmetrically distributed on the top surface of the sliding template along the horizontal direction.

8. The small-section trapezoidal channel slipform construction device according to claim 7, characterized in that: The thickness of the steel plate is ≥2cm.

9. The small-section trapezoidal channel slipform construction device according to claim 8, characterized in that: The slope top base includes a fixed column, and the lifting mechanism is fixed on the fixed column.

10. The small-section trapezoidal channel slipform construction device according to claim 8, characterized in that: The slope top base includes a horizontal slide rail, a fixed column is arranged on the horizontal slide rail, the direction of the horizontal slide rail is consistent with the direction of the channel, and the lifting mechanism is fixed on the fixed column.

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