CN103742168B - Cast anchor hole, switch hole independence lining trolley in tunnel - Google Patents

Abstract

The invention discloses an independent lining trolley for the lower anchor hole/switch hole of a double-track tunnel on a railway passenger dedicated line, which includes a formwork assembly (1), an arch widening mechanism (2), a bracket assembly (3), a central Adjusting mechanism (4), mast assembly (5), mechanical support mechanism (6), lifting mechanism (7), traveling mechanism (8) and other auxiliary structures; the left and right sides of the mast assembly (5) The mechanical support mechanism (6) is connected to both sides of the formwork assembly (1), and the top of the door frame assembly (5) is provided with a centerline adjustment mechanism (4), and there is an arch widening above the centerline adjustment mechanism (4) Mechanism (2), bracket assembly (3) is arranged above the arch frame widening mechanism (2), and bracket assembly (3) is connected with the arch of formwork assembly (1). The invention is convenient to install and disassemble, has good concrete appearance quality and saves cost.

Description

Tunnel anchor hole, switch hole independent lining trolley

technical field

The invention relates to a kind of lining used in the construction of tunnel concrete lining, which is used for widening the special section headroom (which can realize the left and right sides of the line) .

Background technique

At present, my country's railway passenger dedicated lines are all electrified high-speed railways. In order to meet professional technical requirements such as catenary and communication signals, the lower anchor hole and switch hole of the special lining section are designed (70cm and 130cm wider than the normal lining section, respectively). In the traditional construction process, the full house support method is adopted. The construction process includes vertical steel arch frame, assembled steel formwork, erecting scaffolding, pouring, dismantling, and transition. It is inconvenient to drive, the civilized construction of the working surface is poor, and the quality of the concrete appearance cannot be guaranteed. At the same time, a large number of scaffolding steel pipes and fasteners need to be used in the reinforcement process, which consumes labor and increases costs. The inner box formwork installed on the lining trolley also has problems in quality. Defects such as guarantee, small operating space, and extremely low work efficiency lead to slow lining of the arch wall, which easily leads to exceeding the safety step distance of the tunnel. The above-mentioned construction methods cannot meet the safety, quality and appearance requirements of the passenger dedicated line. Therefore, it is imperative to improve the lining construction technology of tunnel anchor holes and switch holes.

Contents of the invention

The technical problem to be solved by the present invention is to provide a safe, high-efficiency, and high-quality independent lining trolley for anchor holes and switch holes, so as to overcome the shortcomings of the prior art such as long construction time and low work efficiency.

The technical solution adopted in the present invention is: it includes formwork assembly, arch frame widening mechanism, bracket assembly, centerline adjustment mechanism, door frame assembly, mechanical support mechanism, lifting mechanism, walking mechanism and other auxiliary structures; Among them, the left and right sides of the gantry assembly are connected with the two sides of the formwork assembly through a mechanical support mechanism, the top of the gantry assembly is provided with a center line adjustment mechanism, and there is an arch widening mechanism above the center line adjustment mechanism, and the arch frame is widened. There is a bracket assembly above the mechanism, and the bracket assembly is connected with the arch of the formwork assembly.

The formwork assembly is composed of standard formwork, non-standard formwork, window formwork, grouting formwork, anchor hole/switch hole plug formwork, the formwork is connected by U-shaped clamps, and the formwork and arch frame are connected by bolts. The non-standard formwork is used at the place where there is a plug formwork, and the window formwork is spaced at a certain height to provide a concrete pouring port. The grouting formwork is installed on the top of the trolley for the final pouring and grouting of the concrete; the lower anchor hole plug formwork and The standard formwork, non-standard formwork, window formwork, and grouting formwork together form the anchor hole lining trolley; the switch hole plug formwork, standard formwork, non-standard formwork, window formwork, and grouting formwork together form the switch hole lining trolley . The anchor hole plug template and the switch hole plug template do not exist at the same time.

The mast assembly includes columns, lower longitudinal beams, oblique supports, upper beams, middle beams, and small longitudinal beams. The gantry assembly is as follows: columns are installed on two parallel lower longitudinal beams, upper beams are installed on the top of the coplanar columns of the same lower longitudinal beams, middle beams are installed on the middle and upper parts, diagonal supports connect the columns and middle beams, and the small longitudinal beams will be the same The uprights on the lower side members are connected into one piece.

The bracket assembly includes formwork arches, formwork columns, formwork beams and upper longitudinal beams, which are connected with the arch formwork to form an integral truss structure, all of which are I-shaped beam structures. Formwork arches are divided into side formwork arches and top formwork arches. The side formwork arches and top formwork arches are hinged. The two ends of the formwork beams are connected to the top formwork arches to form a bow. Integrate with formwork beams.

The running mechanism includes four single wheels, which are respectively arranged under the sliding pillars.

The hoisting mechanism includes support seats welded to the sides of the columns at both ends of the trolley, a sliding column is arranged under the support seat, a mechanical jack is arranged between the support seat and the sliding column, and the sliding column slides in the sliding sleeve.

The center line adjustment mechanism includes a mechanical jack, rollers installed on the upper longitudinal beam, and slide rails welded on the upper beam. The mechanical jack is installed on the support seat, and the support seat is welded on the upper beam.

The widening mechanism of the arch frame includes the formwork beam casing, the lower anchor hole/switch hole formwork beam, and rollers, and a plurality of rollers are installed on the formwork beam casing and the upper longitudinal beam respectively.

The mechanical support system includes a mechanical screw rod, and the mechanical screw rod supports the beam.

Other auxiliary structures include working platforms, stairs.

By replacing part of the formwork supporting arch assembly, the lower anchor hole and switch hole are realized. The purpose of widening the lining without removing the arch is achieved by retracting and extending the formwork beam in the formwork beam sleeve.

In actual use, it has the following technical advantages:

1. The independent lining trolley has the characteristics of simple positioning, fast assembly speed and convenient transition. The trolley is assembled once (5 people can complete the independent lining trolley assembly in 7 days), after the concrete lining, only need to retract the widening section of the arch frame and dismantle the top adjustment section of the trolley (one day) can realize the lining in the front hole Walk in one section, and carry out the next time the trolley is in place. However, when using the construction technology of full hall support, it is necessary to repeatedly build and dismantle the scaffolding. In contrast, the use of independent lining trolleys greatly shortens the cycle time while consuming less labor, and has obvious advantages in technical and economic benefits;

2. The independent lining trolley is used for construction, and the sliding of the formwork beam inside the formwork beam casing solves the complex positioning, installation and disassembly caused by the full-house support method and the installation of the inner box formwork on the outside of the lining trolley. Difficult installation and reinforcement, easy mold run, deformation, difficult tamping, inconvenient driving and other technical problems ensure the safety and quality of the construction of anchor holes and switch holes;

3. The front and rear of the independent lining trolley are equipped with 1-meter normal section standard templates, which can be installed with lower anchor holes and switch hole plug templates. There are window templates at certain distances, and grouting holes are reserved at the same time. After concrete pouring The appearance quality is beautiful, the integrity is good, and the structural size meets the design requirements;

4. After the construction of the lower anchor hole and the switch hole is completed by the independent lining trolley, it only needs to replace the lower anchor hole assembly with the switch hole assembly to carry out the concrete construction of the switch hole, which can realize "one car with multiple purposes" and has a strong Applicability and generalizability.

Description of drawings

Fig. 1 is structural representation, front view of the present invention;

Fig. 2 is a structural representation and a side view of the present invention;

Fig. 3 is a schematic structural view and a perspective view of the present invention;

Fig. 4 is a schematic diagram and perspective view of part of the structure of the present invention, which shows the structure of the present invention except the formwork assembly, arch widening mechanism, bracket assembly, and mechanical support mechanism.

Fig. 5 is a detailed diagram of the midline adjustment mechanism of the present invention.

Fig. 6 is a flowchart of the working steps of the present invention.

detailed description

Embodiment of the present invention: it includes a formwork assembly 1, an arch widening mechanism 2, a bracket assembly 3, a center line adjustment mechanism 4, a door frame assembly 5, a mechanical support mechanism 6, a lifting mechanism 7, and a walking mechanism 8 and other auxiliary structures; wherein the left and right sides of the gantry assembly 5 are connected to both sides of the formwork assembly 1 through a mechanical support mechanism 6, and the top of the gantry assembly 5 is provided with a centerline adjustment mechanism 4, above which the centerline adjustment mechanism 4 There is an arch widening mechanism 2, and a bracket assembly 3 is arranged above the arch widening mechanism 2, and the bracket assembly 3 is connected with the arch of the formwork assembly 1.

Formwork assembly 1 is composed of standard formwork 16, non-standard formwork 14, window formwork 13, grouting formwork 11, anchor hole/switch hole plug formwork 15, the formwork is connected by U-shaped card, and the formwork and arch are used Bolted. The non-standard formwork 14 is used at the formwork with plugs, the window formwork 13 is spaced at a certain height to provide a concrete pouring port, and the grouting formwork 11 is installed on the top of the trolley for the final pouring and grouting of the concrete; the lower anchor hole plugging The head formwork and standard formwork 16, non-standard formwork 14, window formwork 13, and grouting formwork 11 together form an anchor hole lining trolley; switch hole plug formwork and standard formwork 16, non-standard formwork 14, window formwork 13, The grouting formwork 11 jointly forms the switch hole lining trolley. The anchor hole plug template and the switch hole plug template exist at the same time.

The mast assembly 5 includes uprights 28, lower longitudinal beams 23, oblique supports 24, upper beams 17, middle beams 25, and small longitudinal beams 22. The lower longitudinal beams 23 are box-shaped structures to ensure sufficient rigidity and bending resistance in both directions , the other main beams are I-beams to ensure the structural rigidity when the concrete pressure acts on the portal frame during lining construction. The gantry assembly is as follows: columns are installed on two parallel lower longitudinal beams, upper beams 17 are installed on the top of the coplanar columns of the same lower longitudinal beams, middle beams 25 are installed on the middle and upper parts, diagonal supports 24 connect the columns 28 and middle beams 25, The small longitudinal beam 22 connects the columns on the same lower longitudinal beam 23 into one body.

Bracket assembly 3 includes front hole formwork arch 9, lower anchor hole/switch hole formwork arch 10, formwork column, formwork beam and upper longitudinal beam 29, which are connected with arch formwork to form an integral truss structure, all of which are I-shaped beams structure. The formwork arch frame 9 of the front hole is divided into a side formwork arch frame and a top formwork arch frame. The side formwork arch frame and the top formwork arch frame are hinged. The mold arch frame is integrated with the template beam.

The running mechanism 8 includes four single wheels, which are arranged under the sliding pillar 26 respectively. The walking mechanism is mainly composed of steel wheels and bearings with a diameter of 300mm. It needs to be pulled by external force. A loader can be used as traction. If necessary, a motor can be installed at 23 places on the lower longitudinal beam to provide power. The gear chain transmission realizes the drive and walks on the rails. .

Hoisting mechanism 7 comprises the support base that is welded on the column side at two ends of trolley, slide column is arranged under support base, mechanical jack is set between support base and slide column, and slide column slides in the sliding cover. Control the lifting of the car by operating the mechanical jack.

The centerline adjustment mechanism 4 includes a mechanical jack, rollers installed on the upper longitudinal beam, and slide rails welded on the upper beam. The mechanical jack is installed on the support seat, and the support seat is welded on the upper beam. Operate the mechanical jack to control the left and right movement of the template bracket.

The arch widening mechanism 2 includes a formwork beam sleeve, a lower anchor hole/switch hole formwork beam, and rollers, and a plurality of rollers are respectively installed on the formwork beam sleeve and the upper longitudinal beam.

The mechanical support system 6 includes a mechanical screw rod, and the mechanical screw rod supports the beam 21 .

Other auxiliary structures include working platforms, stairs.

The main working principle of the independent lining trolley for anchor hole and switch hole is introduced as follows:

1. Walking principle

The independent lining trolley for anchor hole and switch hole has only 4 single wheels, no driving mechanism, and mainly relies on external traction to walk on the rail.

2. Positioning principle

After the independent lining trolley for the lower anchor hole and switch hole moves to the predetermined position under the traction of external force, the mechanical jack at the lifting mechanism is operated to make the upper longitudinal beam drive the bracket, arch frame, and formwork assembly to move laterally along the tunnel to make the formwork move laterally. Then operate the mechanical jack at the center line adjustment point forward to make the trolley rise, and operate the mechanical jack in the reverse direction to make the trolley fall under its own gravity and reach the specified height. Adjust the mechanical screw screw to support and fix the door frame, arch frame and formwork to prevent deformation.

3. The principle of side-changing and widening lining

When the independent lining trolley for the lower anchor hole and the switch hole is changed to widen the lining on the side, it only needs to remove the connections on the widened side, and under the action of external force, the beam formwork of the lower anchor hole on this side (driving the side bracket and arch frame) Move outward, lock with fixed pin after moving in place and connect with bolts to achieve the purpose of changing the side and widening the lining.

The trolley operation process is as follows (see Figure 5):

1. The trolley is pulled in place

Under the traction of external force, the lining trolley travels on the steel rails to a specified mileage through 4 single wheels.

2. The anchor hole and switch hole arch are widened

Replace the lower anchor hole and switch hole assembly as needed.

3. Trolley positioning

By adjusting the mechanical jack, the upper longitudinal beam drives the bracket, arch frame and formwork assembly to move laterally along the tunnel to make the formwork in place laterally. Then adjust the mechanical jack at the hoisting mechanism to lift the console car into place. Under the action of external force, the beam formwork of the lower anchor hole on the side that needs to be widened (driving the side bracket and arch frame) moves outward, and locks it with a fixed pin after moving in place. , adjust the mechanical screw rod to reinforce and support the trolley to prevent deformation of the trolley.

4. Install template assembly

The templates are connected by U-shaped clips, and the templates and arches are connected by bolts. In order to ensure the appearance quality of the concrete, the end templates must be constructed according to the requirements.

5. Remove the terminal template and demould

Unscrew the screw screw, take off the pin, take off the screw screw, and remove the end template for demoulding.

6. Trolley walking

Under the action of external force, the beam formwork of the lower anchor hole on the side that needs to be widened (driving the side bracket and arch frame) moves inward and retracts, and locks it with a fixed pin after moving in place. Then adjust the mechanical jack at the lifting mechanism to lower the trolley, and pull it to the next anchor hole (switch hole) by external force.

7. Go to step 2

At this point, a working cycle is completed.

Claims (9)

1. An independent lining trolley for anchor holes/switch holes, characterized in that it includes formwork assembly (1), arch widening mechanism (2), bracket assembly (3), center line adjustment mechanism (4 ), mast assembly (5), mechanical support mechanism (6), hoisting mechanism (7), traveling mechanism (8) and other auxiliary structures; the left and right sides of the mast assembly (5) pass through the mechanical support mechanism (6) Connected to both sides of the formwork assembly (1), the top of the mast assembly (5) is provided with a centerline adjustment mechanism (4), and there is an arch widening mechanism (2) above the centerline adjustment mechanism (4) , there is a bracket assembly (3) above the arch widening mechanism (2), and the bracket assembly (3) is connected with the arch of the formwork assembly (1); Formwork assembly (1) is composed of standard formwork (16), non-standard formwork (14), window opening formwork (13), grouting formwork (11), anchor hole/switch hole plug formwork (15), the formwork The space is connected by U-shaped clips, and the formwork and the arch frame are connected by bolts. 2. The independent lining trolley for anchor hole/switch hole according to claim 1, characterized in that: the mast assembly (5) includes a column (28), a lower longitudinal beam (23), a diagonal support (24), Upper beam (17), middle beam (25), small longitudinal beam (22). 3. The independent lining trolley for lower anchor hole/switch hole according to claim 1, characterized in that: the bracket assembly (3) includes the front hole formwork arch (9), the lower anchor hole/switch hole formwork arch (10), lower anchor hole/switch hole adjustment formwork arch (12), front hole formwork column (30), lower anchor hole/switch hole formwork column (31), lower anchor hole/switch hole formwork beam (20), The upper longitudinal beam (29), which is connected with the arch formwork to form an integral truss structure, is an I-shaped beam structure. 4. The independent lining trolley for anchor hole/switch hole according to claim 1, characterized in that: the traveling mechanism (8) includes four single wheels, which are respectively arranged under the sliding pillar (26). 5. The trolley for independent lining of anchor holes/switch holes according to claim 1, characterized in that: the lifting mechanism (7) includes support seats (32) welded to the columns at both ends, sliding pillars (26) , a mechanical jack is set on the sliding strut (26), and the sliding strut (26) can slide in the sliding sleeve (27). 6. The independent lining trolley for lower anchor hole/switch hole according to claim 1, characterized in that: the centerline adjustment mechanism (4) includes a mechanical jack (34), rollers ( 33), the slide rail (35) that is welded on the upper beam (17), the mechanical jack is installed on the support base, and the support base is welded on the upper beam. 7. The independent lining trolley for lower anchor hole/switch hole according to claim 1, characterized in that: the arch widening mechanism (2) includes formwork beam casing (18), lower anchor hole/switch hole formwork beam ( 20), rollers (19), a plurality of rollers are respectively installed on the formwork beam casing and the upper longitudinal beam. 8. The independent lining trolley for anchor hole/switch hole according to claim 1, characterized in that: the mechanical support mechanism (6) includes a mechanical screw screw, and the mechanical screw screw supports the through beam (21). 9. The independent lining trolley for anchor hole/switch hole according to claim 1, characterized in that: other auxiliary structures include working platforms and stairs.