Tie rod-free side wall formwork trolley and side wall construction method

Abstract

The present invention and a tie-rod-free side wall forming trolley are characterized in that they include: a truss assembly, a formwork assembly and a hydraulic walking system; compared with the prior art, the tie-rod-free side wall forming trolley provided by the present invention is simple to operate, has a high degree of mechanization and assembly, and has a high appearance quality of cast concrete, can reduce engineering costs, shorten construction period, has obvious advantages over traditional processes in terms of progress, quality, safety, etc., and has advantages over similar forming trolleys in terms of mechanization, assembly, and no tie-rods, has strong universality, and is easy to promote and use.

Description

Technical Field

[0001] The invention relates to a tie-rod-free side wall moulding trolley and a side wall construction method, belonging to the technical field of construction engineering. Background Art

[0002] With the rapid development of expressways, the concept of green environmental protection has been deeply rooted in people's hearts. Reducing the land use area has become a major trend in expressway design, and various underwater tunnels have sprung up like mushrooms after a rain. Underwater tunnels constructed using the weir construction method use the traditional formwork support process system with wooden formwork or small steel formwork. The material and labor input is large, the process is complicated, the efficiency is low, and the safety risk is high. With the development of science and technology and the improvement of engineering quality requirements, it has become an industry development trend to use large-block combined steel formwork and formwork trolleys for the main structure of underwater tunnels.

[0003] Taihu Tunnel is currently the longest and widest lakebed tunnel in China. It is a key project of the Suzhou-Wuxi-Changzhou Southern Expressway, with a total length of 10.79km. China Railway Fourth Engineering Group Second Engineering Co., Ltd. undertook the construction of the CX-WX3 section of the Suzhou-Wuxi-Changzhou Southern Expressway, with a total length of 5.73km, of which the 384m open section is a U-shaped trough concrete structure, with a gradual height change of the side wall, the highest point reaching 9.405m, and the wall body with vertical angles, so the design and use of the formwork trolley became a key technical issue to ensure the quality and progress of the project construction. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the disadvantages of the above-mentioned technology and to provide a self-propelled, assembled tie-rod-free side wall molding trolley and a side wall construction method.

[0005] In order to solve the above technical problems, the first technical solution proposed by the present invention is: a tie rod-free side wall molding trolley, comprising: a truss assembly, a template assembly and a hydraulic travel system; the truss assembly is a truss structure assembled by horizontal support rods, vertical support rods and diagonal braces connecting the horizontal support rods and the vertical support rods; the template assembly is composed of steel template panels; the template assembly is installed on the side of the truss assembly facing the side wall to be cast; the hydraulic travel system includes an outer jacking cylinder, an inner jacking cylinder, a lateral cylinder, a travel cylinder and a travel caster; the outer jacking cylinder is arranged at the bottom of the truss assembly on the side away from the side wall to be cast; The inner lifting cylinder is arranged at the bottom of the truss assembly on the side close to the side wall to be cast; the outer lifting cylinder and the inner lifting cylinder can push the truss assembly to change its height; the transverse cylinder is arranged at the bottom of the truss assembly, and can drive the truss assembly to move perpendicular to the side wall to be cast after connecting to the bottom plate of the side wall to be cast; the walking cylinder is arranged at one end of the bottom of the truss assembly; and can drive the truss assembly to move parallel to the side wall to be cast after connecting to the bottom plate of the side wall to be cast; the walking casters are arranged at the bottom of the truss assembly on the side away from the side wall to be cast.

[0006] A further improvement of the above scheme is that: the bottom plate of the side wall to be cast is pre-embedded with anchor rods, and anchor seats are installed on the anchor rods.

[0007] A further improvement of the above scheme is that: the anchor seat is provided with a sliding shoe, and the bottom of the truss assembly close to the side wall to be cast is provided with a sliding rail that slidably cooperates with the sliding shoe.

[0008] A further improvement of the above scheme is that both the lateral displacement cylinder and the travel cylinder can be detachably connected to the anchor seat or the sliding shoe of the anchor seat.

[0009] A further improvement of the above solution is that a plurality of counterweights can be arranged on the truss assembly.

[0010] A further improvement of the above scheme is that the steel formwork panel is made of 8mm thick A3 steel, and is provided with large back ribs, transverse stiffening ribs, side ribs, vertical stiffening ribs, and a flat vibrator.

[0011] A further improvement of the above scheme is that a working platform can be set at any position of the horizontal support rods of the truss assembly.

[0012] In order to solve the above technical problems, the second technical solution proposed by the present invention is: a side wall construction method using the tie rod-free side wall molding trolley as described in the first technical solution, comprising the following steps:

[0013] (1) Preparation before pouring: pour the bottom plate of the side wall to be poured; the bottom plate has a chamfer, and the side wall body above the chamfer has a certain height and anchor rods are pre-buried; waterproofing construction of the side wall to be poured and installation of steel bars for the side wall to be poured; at the same time, assemble the trolley according to the actual construction conditions of the project site; install anchor seats on the anchor piles;

[0014] (2) Putting the trolley in place: clean the formwork assembly of the trolley and post the formwork cloth, connect the lateral cylinder and the travel cylinder to the anchor seat, and then use the hydraulic travel system to adjust the six degrees of freedom in the horizontal, longitudinal and vertical directions to accurately put the trolley in place, then fix the trolley to the anchor seat and add counterweight blocks as needed to fix the end formwork of the side wall to be cast;

[0015] (3) Concrete pouring: Concrete is poured by pumping into the mold;

[0016] (4) Demoulding: After the concrete strength reaches 100%, the mould is removed; the bottom of the truss assembly close to the side wall to be cast has a slide rail; the inner and outer lifting cylinders are retracted to make the slide rail fall on the anchor seat, and then the trolley is moved outward by 50 mm using the transverse cylinder; the trolley is lifted 100 mm by the inner and outer lifting cylinders, and a guide beam is placed at the bottom of the formwork assembly; the height of the walking casters is adjusted to make them fall on the bottom plate, and the trolley is moved outward by another 450 mm using the transverse cylinder; the Assemble the formwork and post the formwork cloth, and then use the transverse cylinder to move the trolley 450mm inward; use the inner and outer lifting cylinders to lift the trolley, remove the guide beam, then retract the inner and outer lifting cylinders to make the slide rail fall on the anchor seat, remove the pin of the transverse cylinder anchor seat section, and temporarily hang the transverse cylinder on the truss assembly; the anchor seat is provided with a sliding shoe that cooperates with the slide rail, and the travel cylinder is connected to the sliding shoe; install backrest wheels on the frame of the truss assembly; use the travel cylinder to push the trolley to move to the next section to be cast.

[0017] A further improvement of the above scheme is that it also includes a curing step for the cast side wall, using a covering and moisturizing curing method. After the initial setting of the concrete, a geotextile is used to cover the top of the side wall, and after the final setting of the concrete, watering and curing are started to keep it moist. After demolding, the entire side wall is covered with a geotextile and watered for curing for 7 days.

[0018] A further improvement of the above scheme is that in step (3), during the process of pouring concrete by pumping it into the mold, the temperature of the concrete entering the mold is controlled, the concrete is distributed in layers and sections from the lower elevation side to the higher elevation side, and the concrete vibration process is controlled to ensure the quality of concrete molding.

[0019] Compared with the prior art, the tie-rod-free side wall forming trolley and side wall construction method provided by the present invention are simple to operate, have a high degree of mechanization and assembly, and the cast concrete has a high appearance quality. They can reduce project costs and shorten construction periods. They have obvious advantages over traditional processes in terms of progress, quality, safety, etc., and have advantages over similar forming trolleys in terms of mechanization, assembly, and tie-rod-free. They have strong universality and are easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0022] Figure 2 yes Figure 1 Schematic diagram of the local enlarged structure.

[0023] Figure 3 yes Figure 1 Schematic diagram of the side structure.

[0024] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure.

[0025] Figure 5 This is a schematic diagram of the side wall structure after construction.

[0026] Figure 6 This is the first schematic diagram of the demoulding process.

[0027] Figure 7 This is the second schematic diagram of the demoulding process.

[0028] Figure 8 This is the third schematic diagram of the demoulding process.

[0029] Fig. 9 This is the fourth schematic diagram of the demoulding process. DETAILED DESCRIPTION Example

[0030] The tie rod-free side wall molding trolley of this embodiment is as follows: Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, it includes: a truss assembly 6, a template assembly 8 and a hydraulic travel system; the truss assembly 6 is composed of a number of parallel unit brackets, and the unit bracket is a truss structure assembled by horizontal support rods, vertical support rods and diagonal braces connecting the horizontal support rods and the vertical support rods; the template assembly 8 is composed of a steel template panel; the template assembly 8 is installed on the side of the truss assembly 6 facing the side wall 11 to be cast; the hydraulic travel system includes an outer jacking cylinder 2, an inner jacking cylinder 5, a transverse cylinder 3, a travel cylinder 18 and a travel caster 16; the outer jacking cylinder 2 is arranged at the bottom of the truss assembly 6 away from the side wall 11 to be cast; the inner jacking cylinder 5 ... The cylinder 5 is arranged at the bottom of the truss assembly 6 on the side close to the side wall 11 to be cast; the outer lifting cylinder 2 and the inner lifting cylinder 5 can push the truss assembly 6 to change its height; the transverse cylinder 3 is arranged at the bottom of the truss assembly 6, and can drive the truss assembly 6 to move perpendicular to the direction of the side wall 11 to be cast after connecting the bottom plate 1 of the side wall 11 to be cast; the walking cylinder 18 is arranged at one end of the bottom of the truss assembly 6; and can drive the truss assembly 6 to move parallel to the direction of the side wall 11 to be cast after connecting the bottom plate 1 of the side wall 11 to be cast; the walking caster 16 is arranged at the bottom of the truss assembly 6 away from the side wall 11 to be cast.

[0031] The bottom plate 1 of the side wall 11 to be cast is pre-buried with an anchor rod 12, and an anchor seat 4 is installed on the anchor rod 12. In this way, the transverse cylinder 3 and the travel cylinder 18 can be detachably connected to the anchor seat 4, and then connected to the bottom plate 1 through the anchor rod 12. In order to ensure stability, the top of the truss assembly 6 can also be tightened with the mold on the opposite side through the upper tension screw 10. According to the needs of the project, the mold on the opposite side can be another tie rod-free side wall molding trolley, or other structures such as enclosure structures. In this way, through flexible combination, this embodiment can cast vertical walls, and can also cast walls with vertical angles; it can be applied to ordinary concrete casting, and can also be applied to plain concrete casting.

[0032] The anchor seat 4 is provided with a sliding shoe 17 , and the bottom of the truss assembly 6 on the side close to the side wall 11 to be cast is provided with a sliding rail 20 that is slidably matched with the sliding shoe 17 .

[0033] Several counterweights 19 can be arranged on the truss assembly 6. In order to ensure the stability of the trolley, several adjustable supports 15 are provided on the trolley.

[0034] According to the length of the truss assembly 6, the number of the jacking cylinder 2, the inner jacking cylinder 5, the lateral cylinder 3, the travel cylinder 18 and the travel casters 16 can be appropriately increased or decreased.

[0035] The steel formwork panel is made of 8mm thick A3 steel, and is equipped with large back ribs, transverse stiffening ribs, side ribs, vertical stiffening ribs, and flat vibrators. The width and height of the steel formwork panel can be assembled according to the engineering design drawings.

[0036] According to construction requirements, a working platform 9 can be set at the corresponding horizontal support position of the truss assembly 6, and a ladder 7 leading from the bottom to the working platform 9 is provided.

[0037] The side wall construction method using the tie rod-free side wall molding trolley according to the above technical solution comprises the following steps:

[0038] (1) Preparation before pouring: pour the bottom plate 1 of the side wall 11 to be poured; the bottom plate 1 has a chamfer, and the side wall body above the chamfer has a certain height and the anchor rod 12 is pre-buried; waterproofing construction of the side wall 11 to be poured and installation of the steel bars of the side wall 11 to be poured; at the same time, assemble the trolley according to the actual construction situation at the project site; install the anchor seat 4 on the anchor rod 12 pile;

[0039] (2) Putting the trolley in place: clean the formwork assembly 8 of the trolley and put up the formwork cloth, connect the lateral cylinder 3 and the travel cylinder 18 to the anchor seat 4, and then use the hydraulic travel system to adjust the six degrees of freedom in the horizontal, longitudinal and vertical directions to accurately put the trolley in place, then fix the trolley to the anchor seat 4 and add the counterweight block 19 as needed to fix the end form of the side wall 11 to be cast;

[0040] (3) Concrete pouring: After passing the inspection, the concrete is poured into the mold by pumping; the temperature of the concrete entering the mold is controlled, and the concrete is placed in layers and sections, from the lower elevation side to the higher elevation side; the concrete vibration process is controlled to ensure the quality of concrete molding;

[0041] (4) Demoulding: After the concrete strength reaches 100%, the mould is removed; the bottom of the truss assembly 6 close to the side wall 11 to be cast has a slide rail 20; Figure 6 , retract the inner lifting cylinder 5 and the outer lifting cylinder 2 to make the slide rail 20 fall on the anchor seat 4, so that the inner side of the truss assembly 6 is temporarily supported by the anchor seat 4, and then use the transverse cylinder 3 to move the trolley outward by 50mm; Figure 7 , use the inner lifting cylinder 5 and the outer lifting cylinder 2 to lift the trolley 100mm, insert the guide beam 21 at the bottom of the template assembly 8, and the inner side of the truss assembly 6 is temporarily supported by the guide beam 21, such as Figure 8 , adjust the height of the walking caster 16 to make it fall on the bottom plate 1, use the transverse cylinder 3 to move the trolley 450mm to the outside; clean the template assembly 8 and post the template cloth, and then use the transverse cylinder 3 to move the trolley 450mm to the inside; use the inner jacking cylinder 5 and the outer jacking cylinder 2 to lift the trolley, remove the guide beam 21, and then retract the inner jacking cylinder 5 and the outer jacking cylinder 2 to make the slide rail 20 fall on the anchor seat 4, as shown in FIG. Fig. 9, remove the latch of the anchor section of the transverse cylinder 3, and temporarily hang the transverse cylinder 3 on the truss assembly 6; the anchor seat 4 is provided with a sliding shoe 17 that cooperates with the slide rail 20, and the traveling cylinder 18 is connected to the sliding shoe 17; a backrest wheel is installed on the frame of the truss assembly 6; the traveling cylinder 18 is used to drive the trolley to move along the track arranged by the anchor seat 4 to the next section to be cast in place; in this embodiment, the trolley is moved by contracting and pulling the traveling cylinder 18. According to the different lengths of movement required, it is necessary to change the position of the sliding shoe 17 after the traveling cylinder 18 reaches the contraction limit position, re-extend the traveling cylinder 18, and then re-connect the sliding shoe 17 at the next position, so as to achieve gradual movement.

[0042] (5) Maintenance: Concrete maintenance adopts the covering and moisturizing maintenance method. After the initial setting of the concrete, the top of the side wall is covered with geotextile. After the final setting of the concrete, watering and maintenance are started to keep it moist. After demoulding, the entire side wall is covered with geotextile in time and watered for 7 days. Concrete insulation measures are adopted during winter construction. After completion, if Figure 5 shown.

[0043] The present invention is not limited to the specific technical solutions described in the above embodiments. In addition to the above embodiments, the present invention may also have other implementations. All technical solutions formed by equivalent replacement are within the protection scope required by the present invention.

Claims

1. A side wall construction method using a tie-rod-free side wall molding trolley, the trolley comprising a truss assembly, a template assembly and a hydraulic travel system; characterized in that: The steps include: (1) Preparation before pouring: pouring the bottom plate of the side wall to be poured; the bottom plate has a chamfer, and the side wall body has a certain height above the chamfer; pre-embed anchor rods; waterproofing the side wall to be poured and installing the steel bars of the side wall to be poured; at the same time, assembling the trolley according to the actual construction situation at the project site; installing the anchor seat on the anchor rod; (2) Positioning the trolley: clean the formwork assembly of the trolley and post the formwork cloth, connect the lateral cylinder and travel cylinder of the hydraulic travel system to the anchor seat, and then use the hydraulic travel system to adjust the six degrees of freedom in the horizontal, longitudinal and vertical directions to accurately position the trolley, then fix the trolley to the anchor seat and add counterweight blocks as needed to fix the end formwork of the side wall to be cast; (3) Concrete pouring: Concrete is poured by pumping into the mold; (4) Demoulding: After the concrete strength reaches 100%, the mould is removed; the bottom of the truss assembly close to the side wall to be cast has a slide rail; the inner and outer lifting cylinders of the hydraulic travel system are retracted to make the slide rail fall on the anchor seat, and then the trolley is moved outward by 50 mm using the transverse cylinder; the trolley is lifted by 100 mm using the inner and outer lifting cylinders, and a guide beam is placed at the bottom of the formwork assembly; the height of the walking casters of the hydraulic travel system is adjusted so that it falls on the bottom plate of the side wall to be cast, and the trolley is lifted by the transverse cylinder. The transverse oil cylinder moves the trolley 450mm further outward; clean the template assembly and post the template cloth, and then use the transverse oil cylinder to move the trolley 450mm inward; use the inner jacking oil cylinder and the outer jacking oil cylinder to lift the trolley, remove the guide beam, and then retract the inner jacking oil cylinder and the outer jacking oil cylinder to make the slide rail fall on the anchor seat, and release the connection between the transverse oil cylinder and the anchor seat; the anchor seat has a sliding shoe that cooperates with the slide rail, and the travel oil cylinder is connected to the sliding shoe; install the backrest wheel on the frame of the truss assembly; The travel cylinder is used to push the trolley to move to the next section to be cast.

2. The side wall construction method according to claim 1, characterized in that: It also includes the maintenance steps for the poured side walls, using the covering moisturizing maintenance method. After the initial setting of the concrete, the top of the side wall is covered with geotextile. After the final setting of the concrete, watering maintenance is started to keep it moist. After demolding, the entire side wall is covered with geotextile and watered for maintenance for 7 days.

3. The side wall construction method according to claim 1, characterized in that: In the step (3), during the pouring of concrete by pumping into the mold, the temperature of the concrete entering the mold is controlled, the concrete is distributed in layers and sections from the lower elevation side to the higher elevation side, and the concrete vibration process is controlled to ensure the quality of concrete molding.

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