Needle beam type steel mould trolley

Abstract

The invention discloses a needle beam type steel mould trolley, which is used for secondary lining construction of a full-circle diversion tunnel and comprises a needle beam system consisting of a needle beam and a mould frame, a hydraulic system, a template system and a traction system, the formwork system comprises a top formwork and two side formworks in the longitudinal direction of the tunnel, and the two side formworks are hinged to the two ends of the top formwork correspondingly. The top die template is supported on the die frame, and a fan-shaped included angle formed by the cross section of the top die is 90 degrees; the side molds are connected with the mold frame in a supporting mode through multiple sets of oil cylinders, and the tail ends of the two side molds are located on the combination portion of the whole-circle diversion tunnel second lining bottom platform and the second lining side wall. The top die is provided with two rows of top die feeding holes located in the two sides of the longitudinal center line in the longitudinal direction of the tunnel, each side die is provided with a row of side die feeding holes in the longitudinal direction of the tunnel and above the waist line, and each side die is provided with multiple rows of exhaust holes in the longitudinal direction of the tunnel and below the waist line. According to the trolley, a series of problems of concrete exhausting, top disengaging, trolley floating, formwork cleaning and the like are well solved, and the construction quality and the construction efficiency are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of construction equipment design, and in particular relates to a needle-beam steel formwork trolley suitable for one-time rapid casting of the entire cross-section of a full-circular water diversion tunnel. Background Art

[0002] In water diversion tunnel projects, the external pressure of the soil is usually borne by the initial support or shield segments, while the internal water pressure needs to be borne by the secondary lining concrete. From the perspective of structural force, water diversion tunnels currently generally adopt a full-circular secondary lining concrete integral casting construction process.

[0003] The traditional one-time construction process of a full-circle tunnel has the following quality problems: 1. The appearance quality of the concrete below the waistline is poor. A large amount of gas will be generated due to vibration during the concrete pouring process, and the gas will usually be discharged from the top of the concrete. Some water diversion tunnel structures are designed to be circular. In order to ensure the structural force, the construction of the full-circle secondary lining concrete requires the use of integral steel formwork for support. Therefore, the gas generated during the concrete pouring process below the 180° waistline cannot be discharged normally, resulting in a large number of bubbles and holes on the surface of the concrete after the formwork is removed later. The appearance quality of this part is very poor. 2. The problem of incomplete top pouring. The top pouring construction of the secondary lining concrete of the full-circle tunnel usually adopts the method of setting a number of top pouring holes on the top of the formwork for top concrete pouring construction. This will cause cavities at the top of the structure and quality defects. 3. The problem of the overall buoyancy of the trolley. During the concrete pouring process of the full-circular water diversion tunnel, the contact area between the steel formwork and the concrete is large, and it will be subject to a large buoyancy of the concrete. If the trolley anti-floating design is not carried out separately, the steel formwork and the deadweight of the trolley alone cannot meet the anti-floating requirements. This will cause the structural dimensions of the formed tunnel and the roundness of the tunnel to fail to meet the construction requirements. 4. The problem of grinding and cleaning the steel formwork. In order to ensure the appearance quality of the next warehouse concrete pouring and the smooth demolding of the formwork, the steel formwork needs to be polished and cleaned in time after the second lining concrete of the tunnel is poured. However, due to the influence of the tunnel structure size and the design of the needle-beam steel formwork trolley, the ordinary steel formwork trolley template has a small shrinkage space, and the steel formwork cannot be thoroughly ground and cleaned.

[0004] Therefore, it is necessary to design a needle-beam steel formwork trolley for the integral pouring of full-circular secondary lining concrete, which is of great significance for improving the quality of concrete construction in the overall one-time construction process of the full-circular tunnel and improving construction efficiency. Summary of the invention

[0005] The present invention discloses a needle beam steel formwork trolley in view of the deficiencies of the prior art. The purpose of the present invention is to provide a needle beam steel formwork trolley capable of improving the overall pouring quality of the full-circular second lining concrete of the water diversion tunnel in view of a series of quality problems encountered in the construction of the full-circular second lining concrete of the water diversion tunnel that cannot be dealt with by ordinary needle beam steel formwork trolleys.

[0006] The present invention is achieved through the following technical solutions:

[0007] A needle beam steel formwork trolley is used for the secondary lining construction of a full-circle water diversion tunnel, comprising: a needle beam system consisting of a needle beam and a formwork frame, a hydraulic system, a formwork system, and a traction system; the characteristics are:

[0008] The template system includes a top template and two side templates along the longitudinal direction of the tunnel, and the two side templates are hinged to the two ends of the top template respectively; the top template template is supported on the template frame, and the gravity of the template is transmitted to the needle beam through the template frame, and the fan-shaped angle formed by the cross-section of the top template is 90 degrees; the side templates are connected to the template frame support through multiple groups of oil cylinders, and the ends of the two side templates are respectively located at the junction of the second lining bottom platform and the second lining side wall of the full-circle water diversion tunnel; the top template is provided with two rows of top template feeding holes on both sides of the longitudinal center line along the longitudinal direction of the tunnel, each side template is provided with a row of side template feeding holes along the longitudinal direction of the tunnel and above the waistline, and each side template is provided with multiple rows of exhaust holes along the longitudinal direction of the tunnel and below the waistline.

[0009] The top formwork of the present invention is provided with a plurality of sets of molded grouting devices along the longitudinal center line structure of the tunnel, and the molded grouting devices are composed of reserved PVC pipes, flanges, bolts, nuts, galvanized pipes and reducer sleeves.

[0010] Furthermore, a plurality of sets of anti-lateral displacement oil cylinders fixed to the tunnel wall supports are arranged on both sides of the mold frame at the tunnel waistline height and at intervals along the longitudinal direction of the tunnel.

[0011] Furthermore, at the ends of the two side molds, there are detachable horizontal cylinders spaced along the longitudinal direction of the tunnel for fixing the two side molds during the second lining concrete pouring construction.

[0012] Furthermore, at the ends of the two side molds, there are spaced apart along the longitudinal direction of the tunnel, large-stroke mold-retracting cylinders cross-connected with the mold frame for shrinking the side molds.

[0013] Furthermore, working platforms are arranged on both sides of the mold frame along the longitudinal direction of the tunnel.

[0014] Furthermore, the upper and lower cross beams of the needle beam are both provided with two groups of tracks arranged in parallel along the longitudinal direction of the tunnel, and the upper and lower cross beams of the mold frame are provided with walking mechanisms matching the tracks.

[0015] The needle-beam type steel formwork trolley of the present invention is suitable for the secondary lining concrete construction of a full-circular water diversion tunnel. Compared with ordinary steel formwork trolleys, the trolley of the present invention well solves a series of problems such as concrete exhaust, top emptying, trolley floating, and template cleaning, effectively improving the construction quality and accelerating the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a longitudinal schematic diagram of the overall structure of the needle beam type steel mold trolley of the present invention;

[0017] Figure 2 It is a longitudinal schematic diagram of the needle beam structure of the present invention;

[0018] Figure 3 It is a longitudinal schematic diagram of the support mold frame of the present invention;

[0019] Figure 4 yes Figure 1 Schematic diagram of the middle AA section;

[0020] Figure 5 yes Figure 1 Schematic diagram of the middle BB section;

[0021] Figure 6 yes Figure 1 Schematic diagram of the middle CC section;

[0022] Figure 7 It is a cross-sectional schematic diagram of the needle beam type steel mold trolley template of the present invention in a retracted state;

[0023] Figure 8 It is a schematic diagram of the arrangement of the exhaust holes and the feeding holes of the needle beam type steel mold trolley template of the present invention;

[0024] Fig. 9 It is a schematic structural diagram of the mold grouting device of the present invention.

[0025] In the figure, 1 is the needle beam, 2 is the formwork frame, 3 is the secondary lining concrete, 4 is the tunnel, 5 is the formwork system; 11 is the front leg of the needle beam, 12 is the rear leg of the needle beam, 13 is the needle beam truss, 14 is the traction system, 15 is the upper track, 16 is the lower track; 21 is the front leg of the formwork frame, 22 is the rear leg of the formwork frame, 23 is the formwork frame truss, 24 is the hydraulic station, 25 is the working platform, 26 is the grouting device with formwork, and 27 is the top formwork loading Hole, 28 is the end mold, 29 is the walking mechanism; 31 is the bottom platform of the second substrate; 51 is the top mold, 52 is the side mold, 53 is the hinge shaft, 54 is the supporting cylinder, 55 is the horizontal cylinder, 56 is the anti-lateral displacement cylinder, 57 is the mold closing cylinder, 58 is the exhaust hole, 59 is the side mold feeding hole, 61 is the grouting pipe, 62 is the flange, 63 is the stud, 64 is the nut, 65 is the galvanized pipe, 66 is the reducer, and A is the top mold angle. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0027] Combined with the attached pictures.

[0028] The needle beam type steel formwork trolley of the present invention comprises four parts: a needle beam system, a hydraulic system, a template system and a traction system.

[0029] Needle beam system by H300 200 8 The formwork system consists of 3 panels with a thickness of 10mm, longitudinal ribs of 10# channel steel, side ribs and transverse ribs of δ12×200 flat steel, formwork and frame beams of 20# I-beam, 20# channel steel and 10# channel steel. The hydraulic hoisting system consists of a formwork hydraulic station and a needle beam hydraulic station. The traction system consists of a hoist, pulley, etc.

[0030] The total length of the needle beam of this equipment is 31.7m, the needle beam legs are hydraulic legs, the leg spacing is 28m, and the internal space of the needle beam is 2.00 1.25m, the length of the steel formwork is 12.1m (including 0.1m overlap).

[0031] When the trolley of the present invention encounters abnormal situations such as partial exhaust holes being blocked and inconsistent cylinder strokes, the exhaust holes can be cleaned after each bin is poured, and the cylinder and other components can be maintained at any time, and spare parts can be prepared on site so that they can be replaced in time if any problems occur.

[0032] Taking a water diversion tunnel project with an inner diameter of 5.1 meters as an example, the shield machine was used to complete the primary lining construction of the water diversion tunnel project, and the trolley of the present invention was used for the secondary lining construction. The trolley of the present invention solved a series of problems such as the difficulty of exhausting below the waistline of concrete, top degassing, and trolley floating. At the same time, the appearance quality of the formed concrete is high, and the construction efficiency is guaranteed.

[0033] The trolley of the present invention will be described in detail below.

[0034] 1. The trolley of the present invention is designed with special exhaust holes and vibrators

[0035] The trolley of the present invention is equipped with three steel templates, including a top template and two side templates. The top template and the side template are connected by hinges. In order to solve the problem of poor appearance quality of concrete caused by the inability to exhaust below the waistline, the parts below the waistline of the two side templates are specially The exhaust holes with a diameter of φ10mm are arranged in a plum blossom shape with a spacing of 0.5m. At the same time, the attached vibrator installed inside the formwork is used to solve the problem of the inability to exhaust air during the pouring process of the part below the waistline of the full-circle tunnel.

[0036] 2. This equipment is designed with a mold grouting device

[0037] The trolley of the present invention is provided with a mold grouting device on the top of the steel template, and the device is composed of a reserved PVC pipe, a flange, bolts, nuts, a galvanized pipe, a reducer sleeve and other components. In this embodiment, the flange is installed at the reserved opening, the PVC pipe is installed in the flange, the lower part of the PVC pipe is connected to the galvanized pipe, and fixed with bolts and nuts, and the reducer sleeve is connected to the bottom of the galvanized pipe to complete the installation of the mold grouting device. In this embodiment, the PVC pipe is 4.9m Φ50 long, the galvanized pipe is 0.6m DN50 long, and the reducer sleeve specification is DN50-25.

[0038] The present invention can display the concrete voiding position through the pre-buried anti-voiding device. After the second lining concrete is poured, the grouting equipment can be connected to the reserved grouting device with mold, and the grouting construction can be carried out immediately, thereby quickly and accurately solving the problem of voiding at the top of the second lining concrete.

[0039] Grouting with mold is to grout in time after the lining concrete is poured. Due to the protection of the trolley, a higher pressure can be used for grouting. The grouting material and the lining concrete are combined into a whole, which improves the integrity of the lining structure and repairs various concrete voids and defects at the first time. The grouting process with mold is simple and easy to operate. Grouting can start after the concrete is poured. The grouting construction time is short and does not occupy any operation process time of the tunnel. The grouting pipe adopts Φ50PVC grouting pipe. PVC pipe is a high-performance synthetic plastic pipe with good bonding performance with concrete, high strength, easy to cut, and convenient for demoulding of the lining trolley. The micro-expansion grouting material used in the present invention has micro-expansion performance, good fluidity and pumpability, good bonding performance with concrete, long construction time, no water seepage and shrinkage, and high strength after solidification.

[0040] 3. Optimize structural design to reduce equipment floating

[0041] During the concrete pouring process of the full-circular water diversion tunnel, the contact area between the steel formwork and the concrete is large, which causes the trolley to be subjected to a large concrete buoyancy, thereby causing the structural dimensions to be deformed. The ordinary needle-beam steel formwork trolley is composed of four templates. The trolley of the present invention cancels the bottom template, first constructs the bottom driving channel concrete, and then pours the side top arch after the bottom driving channel concrete has initially set, thereby reducing the contact area between the steel formwork and the concrete, reducing the buoyancy of the trolley, ensuring that the trolley's deadweight is greater than the buoyancy, and the structural dimensions meet the design requirements.

[0042] 4. Optimize structural design to increase mold space

[0043] The existing water diversion tunnel structure size is generally small, and affected by the design of the needle beam steel formwork trolley, the ordinary needle beam steel formwork trolley has very small template shrinkage space, which cannot meet the space requirements for grinding and cleaning the steel formwork. This equipment removes the bottom template and increases the stroke of the hydraulic cylinder, greatly increasing the space between the template after demoulding and the finished concrete, providing a good operating space for subsequent workers to grind and clean the template.

Claims

1. A needle beam steel formwork trolley for secondary lining construction of a full-circle water diversion tunnel, comprising: The needle beam system, hydraulic system, template system and traction system are composed of the needle beam and the template frame; the characteristics are: The template system includes a top template and two side templates along the longitudinal direction of the tunnel, and the two side templates are hinged to the two ends of the top template respectively; the top template template is supported on the template frame, and the gravity of the template is transmitted to the needle beam through the template frame, and the fan-shaped angle formed by the cross-section of the top template is 90 degrees; the side templates are connected to the template frame support through multiple groups of oil cylinders, and the ends of the two side templates are respectively located at the junction of the second lining bottom platform and the second lining side wall of the full-circle water diversion tunnel; the top template is provided with two rows of top template feeding holes on both sides of the longitudinal center line along the longitudinal direction of the tunnel, each side template is provided with a row of side template feeding holes along the longitudinal direction of the tunnel and above the waistline, and each side template is provided with multiple rows of exhaust holes along the longitudinal direction of the tunnel and below the waistline.

2. The needle beam type steel mold trolley according to claim 1, characterized in that: The top formwork is provided with a plurality of sets of molded grouting devices along the longitudinal centerline structure of the tunnel, and the molded grouting devices are composed of reserved PVC pipes, flanges, bolts, nuts, galvanized pipes and reducer sleeves.

3. The needle beam type steel mold trolley according to claim 2, characterized in that: A plurality of sets of anti-lateral displacement oil cylinders fixed to the tunnel wall supports are arranged at both sides of the mold frame at the tunnel waistline height and at intervals along the longitudinal direction of the tunnel.

4. The needle beam type steel mold trolley according to claim 2, characterized in that: The ends of the two side molds are provided with detachable horizontal cylinders at intervals along the longitudinal direction of the tunnel for fixing the two side molds during the second lining concrete pouring construction.

5. The needle beam type steel mold trolley according to claim 2, characterized in that: The ends of the two side molds are spaced apart along the longitudinal direction of the tunnel with large-stroke mold-retracting cylinders cross-connected with the mold frame for shrinking the side molds.

6. The needle beam type steel mold trolley according to claim 2, characterized in that: Working platforms are arranged on both sides of the mold frame along the longitudinal direction of the tunnel.

7. The needle beam type steel mold trolley according to claim 2, characterized in that: The upper and lower cross beams of the needle beam are both provided with two groups of tracks arranged in parallel along the longitudinal direction of the tunnel, and the upper and lower cross beams of the mold frame are provided with walking mechanisms matching the tracks.

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