CN108868829A - Movable door type combined die carrier for variable cross-section tunnel secondary lining - Google Patents

Abstract

The invention belongs to a movable portal-type combined formwork for the second lining of variable-section tunnels, which is composed of full-scale scaffolding and walking devices. The movable portal-type combined formwork for the second lining of variable-section tunnels includes movable Mobile gantry trolley, full hall scaffolding, prefabricated formwork, shaping comb mold and small steel mold. Movable portal trolley: it is used to carry and move full-scale scaffolding, assembled templates, shaping comb molds and small steel molds. The movable portal trolley is composed of portal frame and walking device. The portal frame is assembled by steel plate box column, steel plate box beam, steel plate box bottom beam and bolts. The invention can be applied to the secondary lining of mining tunnels with super large section, variable section size and profile, and large-angle turning lines. Advantages of using the effect well.

Description

Movable Portal Combined Formwork for Secondary Lining of Variable Cross-section Tunnel

technical field

The invention belongs to a movable door-type combined formwork used for the second lining of variable-section tunnels.

Background technique

The secondary lining (referred to as the secondary lining) is the molded concrete or reinforced concrete lining applied on the inner side of the primary support during the construction of the mining method tunnel project. The secondary lining and the primary support form a composite lining; the secondary lining bears the load acting on the secondary lining due to the possible deterioration of the primary support of the tunnel, or the additional load caused by soft rock creep and changes in environmental conditions, etc. as a safety reserve.

For the construction of the second lining arch wall of the mine tunnel, the integral lining trolley or the full hall scaffolding are generally used, but there are defects in the existing technology, such as the integral lining trolley is only suitable for the surrounding rock is good, the line is long, a single size section, small radius tunnel. For tunnels with variable cross-section size and profile changes, it is necessary to purchase multiple sets of trolleys according to the change in tunnel cross-section size, which not only increases the investment cost, but also cross-section operations make the transportation of materials and equipment inconvenient.

Although the use of full scaffolding (i.e. the construction tunnel is fully supported by scaffolding, which needs to be built from the ground of the construction tunnel) is suitable for the secondary lining construction of any cross-section and good geological conditions, but the erection and dismantling of the scaffolding is of large volume and cannot be moved, blocking equipment and materials There are many high-altitude operations in the passageway, and there are great potential safety hazards. Especially for the super-large cross-section tunnel of the CRD construction method, the cost area is large and the construction period is uncontrollable.

Therefore, there is an urgent need to solve the problems of super-large cross-sections in weak surrounding rock formations, variable cross-section sizes and contours, limited working space for the second lining of mining tunnels with large-angle turning lines, cross operations, the need to invest in multiple sets of trolleys, single cross-section adaptability, and difficult operations. Low efficiency and other issues.

Contents of the invention

The purpose of the present invention is to provide a movable door-type combined formwork for the second lining of variable-section tunnels, which can be applied to the second lining of mining tunnels with super large sections, variable section sizes and contours, and large-angle turning lines, and has flexible operation. The utility model has the advantages of convenience, strong applicability, labor and labor saving, low cost, high construction and economic efficiency, saving construction period and good use effect.

For this reason, the present invention is composed of a full hall scaffolding and a walking device. The movable portal-type combined formwork for the second lining of a variable-section tunnel includes a movable portal trolley, a full hall scaffolding, an assembled formwork, and a shaped comb. molds and small steel molds. in:

Movable portal trolley: it is used to carry and move full-scale scaffolding, assembled templates, shaping comb molds and small steel molds. The movable portal trolley is composed of portal frame and walking device.

The portal frame is assembled by steel plate box columns, steel box beams, steel plate box bottom beams and bolts. Several steel box columns distributed at intervals are symmetrically distributed on both sides of the portal frame. Several steel plates The two ends of the box beams are respectively connected to the upper ends of the corresponding steel box columns on both sides, the I-shaped steel beams are connected to the adjacent steel box beams, and the lower ends of the steel box columns on both sides are located on the bottom beams of the two steel box boxes.

A set of vertical hydraulic lifting system is installed at both ends of each side of the portal frame. The ejector rod at the lower end of the hydraulic lifting system is located on the vehicle body of the traveling device, and the cylinder seat at the upper end of the hydraulic lifting system is connected with the corresponding portal frame. .

The inner shaft of the steel plate box beam side of the portal frame is equipped with a horizontal slider, the inner side of the horizontal slider is connected with the ejector rod of the horizontal hydraulic part, and the outer shaft of the horizontal slider is connected with one end of the adjustable screw rod, which can be adjusted The other end of the screw rod is connected to the inner side wall of the upper end of the prefabricated formwork of the corresponding part, and the inner side wall of the prefabricated formwork corresponding to the lower end of the adjustable screw rod and the side end of the portal frame body of the corresponding part are separated by several adjustable Adjust screw.

The other side end of the portal frame body and the upper end of the portal frame body are successively provided with a full scaffolding, a shaping comb mold and a small steel mold.

Mantang scaffolding: used to support the shaping comb mold and small steel mold, the mantang scaffolding is located on the upper end and one side of the portal frame, and the one side of the mantang scaffolding is located on one side of the portal frame and the upper end of the portal frame On the I-shaped steel beam, the other side of the scaffolding supports one end of the shaping comb mold, and the other end of the shaping comb mold is provided with a small steel mold.

Prefabricated formwork: located on the other side of the portal frame body, the distance between the inner side wall of the upper end of the prefabricated formwork and the side wall of the corresponding part of the portal frame body is realized by horizontal sliders and horizontal hydraulic parts. The distance between the inner wall of the middle part and the lower end and the side wall of the portal frame body of the corresponding part is completed by several adjustable screw rods arranged at intervals in cooperation with horizontal hydraulic components.

Shaping comb mold: used to undertake the small steel mold, the shaping comb mold is located between the scaffolding and the small steel mold.

Small steel formwork: used to support the second lining of variable cross-section tunnel located in the scaffolding part of the whole hall.

The movable gantry trolley is in the shape of a door font.

The walking device is divided into a power walking device and a supporting walking device. The power running device is positioned at both sides of the rear end lower part of the portal frame, and the supporting running device is positioned at both sides of the front end lower part of the portal frame, and the power running device is to drive the portal frame and support the running device. The power traveling device is composed of a car body, a motor, a driving rail wheel, a traveling rail wheel, a small sprocket, a large sprocket and a bearing pair. The driving rail wheel and the traveling rail wheel are respectively located at the rear and front of the lower part of the car body. The two ends of the rail wheel shaft in the middle part of the driving rail wheel and the traveling rail wheel are connected to the lower part of the car body through two bearing pairs, and the rail wheel shaft of the driving rail wheel There is a large sprocket, the motor is fixed on the car body above the driving rail wheel, the small sprocket is located on the motor shaft, the motor shaft drives the large sprocket through the small sprocket and the chain, the driving rail wheel and the traveling rail wheel are located on the track .

Reinforcing ribs are provided between the steel plate box columns and the corresponding steel plate box beams. One end of the adjustable threaded mandrel located at the lower end of the assembled formwork can be the apex with the ground. The positions of the assembled formwork on the portal frame and the full scaffolding can be interchanged as required. A climbing ladder is provided on the rear end side of the portal frame body. Both sides of the front end of the portal frame are provided with anti-collision frames. Reinforced channel steel columns are arranged between the steel plate box columns adjacent to each side, and oblique steel columns are arranged between each steel plate box column and the steel plate box bottom beam.

The upper periphery of the portal frame is provided with an operating platform.

The above structure achieves the object of the present invention.

The invention can be applied to the secondary lining of mining tunnels with super large section, variable section size and profile, and large-angle turning lines. Advantages of using the effect well.

Compared with the prior art, the present invention has the following advantages and positive effects:

(1) The walking device is adopted to make the overall movement of the portal platform without consuming a lot of manpower, and the operation is simple.

(2) The portal platform structure is adopted, under the premise of ensuring the overall rigidity and stability of the portal platform, the portal platform is lightweight, convenient for hoisting and transportation, and the lower space of the portal platform forms a channel, even if Simultaneously investing multiple sets of platforms can also meet the needs of material transportation and vehicle traffic.

(3) The portal frame is connected by bolts, which is convenient for quick assembly and disassembly when the space in the tunnel is limited.

(4) The present invention can be set to install a full house of scaffolding and small steel molds according to the sudden change of the section, and can adjust the assembled formwork through the adjustment of the horizontal hydraulic parts, which can minimize the amount of manual work and reduce the safety risk during operation.

(5) The present invention can adjust the distribution ratio and length of the scaffolding on the portal platform according to the actual needs, and has remarkable applicability to tunnel profiles with variable cross-sections and large-angle turning tunnels, reducing the investment in manpower and equipment, and improving the work efficiency.

(6) The present invention has the advantages of unique concept, simple structure, compactness and reasonableness, safe and reliable working performance, flexible and labor-saving operation, suitable for construction and use, and convenient for promotion.

Description of drawings

Fig. 1 is a schematic diagram of a cross-sectional support structure in a construction area involved in the present invention.

Fig. 2 is a schematic view of the side structure of the present invention.

Fig. 3 is a structural schematic diagram of the present invention.

FIG. 4 is a schematic diagram of the A-A section structure in FIG. 2 .

Fig. 5 is a schematic diagram of the transmission structure of the power traveling device of the present invention.

Fig. 6 is a schematic structural view of the power walking device of the present invention.

Detailed ways

As shown in FIGS. 1 to 6 , a movable door-type combined formwork used for the second lining of a variable-section tunnel is composed of a full hall scaffold 20 and a walking device 36 .

As shown in Figures 1 to 4, the movable portal formwork for the second lining of variable-section tunnels includes a movable portal trolley, full scaffolding, assembled formwork 19, shaping comb mold 21 and small Steel mold 22. in:

Movable portal trolley: used to carry and move full-scale scaffolding, assembled templates, shaping comb molds and small steel molds. Movable portal trolley is made of portal frame body 35 and running gear 36. The movable gantry trolley is in the shape of a door font.

The portal frame body 35 is assembled by steel box column 1, steel box beam 2, steel box bottom beam 4 and bolts, steel box column, steel box beam, steel box bottom beam are steel box The hollow structure is composed of connecting flanges at both ends, and the connections of the columns, beams and bottom beams are assembled by bolts and connecting flanges to facilitate overall disassembly and assembly.

Several steel box columns distributed at intervals are symmetrically distributed on both sides of the portal frame. The two ends of several steel box beams are respectively connected to the upper ends of the corresponding steel box columns on both sides. The adjacent steel plate box beam, the lower end of the I-shaped steel beam is located at the upper end of the steel plate box beam. The lower ends of the steel plate box columns on both sides are located on the bottom beams of the two steel plate box bodies. The lower parts of the two ends of the I-shaped steel beam are also connected to the adjacent steel plate box beams by bolts. Reinforced channel steel columns 11 are provided between the adjacent steel plate box columns on each side, and oblique steel columns 12 are arranged between each steel plate box column and the steel plate box bottom beam to increase the strength of each steel box body. The strength between the column and the corresponding steel plate box bottom beam.

Reinforcing ribs 15 are provided between each steel plate box column and the corresponding steel plate box beam to increase the strength between the steel plate box column and the corresponding steel plate box beam. The two ends of the reinforcement ribs are also connected by bolts to the column of the steel box body and the beam of the steel box body.

A set of vertical hydraulic lift system 5 is respectively installed at both ends of each side of the portal frame, and the ejector rod 17 at the lower end of the hydraulic lift system is located on the car body 6 of the traveling device; that is: the ejector rod at the lower end of the hydraulic lift system passes through the The connecting shaft 33 in the middle of the body is pivotally connected with the vehicle body.

The cylinder block 32 at the upper end of the hydraulic lifting system is connected with the portal frame body of the corresponding part. When the ejector rod at the lower end of the hydraulic lifting system is pushed out or retracted from the cylinder base, the overall lifting of the portal frame can be realized. Apparently, the hydraulic lifting system is used to support the portal frame on the traveling device and realize the overall lifting of the portal frame.

The inner shaft of one side of the steel plate box beam of the gantry frame is provided with a horizontal slider 16, and the horizontal slider and the steel plate box beam of the corresponding part can be connected through slideways and chute shafts, and the inner side of the horizontal slider and the horizontal hydraulic parts The ejector rod of 18 is connected, and the cylinder body of the horizontal hydraulic part is fixed on the steel plate box beam of the corresponding part. The outer shaft of the horizontal slider is connected to one end of the adjustable screw rod 10, and the other end of the adjustable screw rod is connected to the inner side wall of the upper end of the assembled formwork of the corresponding part. Several adjustable screw rods are arranged at intervals between the inner side wall of the assembled formwork corresponding to the lower end of the adjustable screw rod and the side end of the portal frame body of the corresponding part. Apparently, the distribution structure of the above-mentioned group of horizontal sliders and adjustable screw rods can be arranged in arrays distributed at intervals according to the width of the fabricated formwork. The adjustable screw rod can be connected with the side of the portal frame body through the lifting lug located on the portal frame body.

The other side end of the portal frame body and the upper end of the portal frame body are successively provided with a full scaffolding, a shaping comb mold and a small steel mold.

Mantang scaffolding 20: used to support the shaping comb mold and small steel mold, the mantang scaffolding is located on the upper end and one side of the portal frame, and the one side of the mantang scaffolding is located on one side of the portal frame and the portal frame On the I-shaped steel beam at the upper end, the other end of the scaffolding supports one end of the shaping comb mold, and the other end of the shaping comb mold is provided with a small steel mold.

Assembled formwork 19: located on the other side of the portal frame body, the distance between the inner side wall of the upper end of the assembled formwork and the side wall of the portal frame body of the corresponding part is realized by horizontal sliders and horizontal hydraulic parts, the assembled formwork The distance between the inner wall of the middle part and the lower end and the side wall of the portal frame body of the corresponding part is completed by several adjustable screw rods arranged at intervals and coordinated with horizontal hydraulic parts. The outer side of the prefabricated template is the second lining 23 of the variable-section tunnel. One end of the adjustable threaded rod located at the lower end of the prefabricated formwork can be apex with the ground, so as to facilitate the fastening of the prefabricated formwork on the second lining of the variable-section tunnel.

The positions of the assembled formwork on the portal frame and the full scaffolding can be interchanged as required. That is: the assembled formwork can be located on any side of the portal frame as required, and the rest of the portal frame can be equipped with scaffolding.

Shaping comb mold 21: used to accept small steel moulds, the shaping comb mold is located between the scaffolding and the small steel moulds.

Small steel mold 22: used to support the second lining of variable cross-section tunnel located in the scaffolding part of the whole hall.

A ladder 13 is provided on one side of the rear end of the portal frame body to facilitate construction workers to move the portal trolley up and down. An operation platform 14 is provided on the upper periphery of the portal frame body, so that construction personnel can stand on it for construction conveniently.

Both sides of the front end of the portal frame body are provided with anti-collision frames 24 to prevent collision damage between the movable portal trolley and the tunnel wall.

As shown in Figure 5 and Figure 6, the walking device is divided into a powered walking device and a supporting walking device. The power running device is located at both sides of the rear end lower part of the portal frame. The supporting walking device is located at both sides of the lower front end of the portal frame.

The power traveling device is to drive the portal frame and support the traveling device. Described power traveling device is made of car body 6, motor 7, drive rail wheel 26, travel rail wheel 34, small sprocket wheel 27, large sprocket wheel 30 and bearing pair 29. The driving rail wheel is positioned at the rear portion of the lower end of the car body, and the traveling rail wheel is positioned at the front portion of the lower end of the car body. The two ends of the rail wheel shaft 25 in the middle part of the driving rail wheel and the traveling rail wheel are in axial connection with the lower part of the car body through two bearing pairs. A large chain wheel is arranged on the rail wheel axle of the driving rail wheel. A motor is fixed on the car body at the top of the driving rail wheel, and the small sprocket is positioned on the motor shaft. The motor shaft drives the large sprocket through the small sprocket and chain 28, and the driving rail wheel and the traveling rail wheel are positioned on the track 8. The lower end of the track is positioned on the sleeper 9. The ratio of the number of teeth of the small sprocket to the number of teeth of the large sprocket is 1:3-5. For safety, a protective cover 31 is installed on the motor shaft and the small sprocket.

The two supporting running devices at the front end only support and move the portal frame. The difference between the two supporting running devices at the front end and the two power running devices at the rear end is that there is no motor, large and small sprockets and chains, and the rest are the same. , so it will not be repeated.

When in use, the motors on the two power walking devices at the rear end can be started at the same time to make the motors rotate forward and reverse, and the motor shaft drives the drive rail wheels to move through the small sprocket and the chain drive large sprocket, so that each supporting walking vehicle advances along the track And retreat, drive the portal frame body and the full scaffolding on it, the assembled formwork, the shaping comb mold and the small steel mold to move to the suitable position of the tunnel for operation. Then, start the hydraulic lifting system to adjust the height of the portal frame. After starting the horizontal hydraulic parts to adjust the distance between the inner side wall of the upper end of the assembled formwork and the side wall of the portal frame body of the corresponding part, fix several adjustable screw rods arranged at intervals thereafter. Set one end of the full scaffolding on one side of the portal frame and the I-beam on the upper end of the portal frame, and the other side of the full scaffold supports one end of the shaping comb mold, and the other end of the shaping comb mold One end is provided with a small steel mold. The second lining of the variable-section tunnel is constructed on the outside of the small steel formwork and the outside of the assembled formwork, and the second lining of the variable-section tunnel is completed. Start the hydraulic lifting system to shrink the height of the portal frame, remove the adjustable screw rod, start the horizontal hydraulic parts to retract the horizontal slider, so that the small steel formwork and the outer side wall of the assembled formwork are separated from the second lining of the tunnel after construction. Repeat the previous construction.

In a word, the present invention can be applied to the secondary lining of mining tunnels with super-large section, variable section size and profile, and large-angle turning lines. It has the advantages of flexible and convenient operation, strong applicability, labor and labor saving, low cost, high construction and economic The advantages of good construction period and use effect.

Claims (10)

1. A movable portal-type combined formwork for the second lining of variable-section tunnels, which is composed of full scaffolding and walking devices, characterized in that: the movable portal-type combined formwork for the second lining of variable-section tunnels The frame includes movable portal trolley, full hall scaffolding, assembled formwork, shaping comb mold and small steel mold, among which: Movable portal trolley: used to carry and move full-scale scaffolding, assembled formwork, shaping comb molds and small steel molds. The movable portal trolley is composed of portal frame and walking device; The portal frame is assembled by steel plate box columns, steel box beams, steel plate box bottom beams and bolts. Several steel box columns distributed at intervals are symmetrically distributed on both sides of the portal frame. Several steel plates The two ends of the box beams are respectively connected to the upper ends of the corresponding steel box columns on both sides, the I-shaped steel beams are connected to the adjacent steel box beams, and the lower ends of the steel box columns on both sides are located on the bottom beams of the two steel box boxes; A set of vertical hydraulic lifting system is installed at both ends of each side of the portal frame. The ejector rod at the lower end of the hydraulic lifting system is located on the vehicle body of the traveling device, and the cylinder seat at the upper end of the hydraulic lifting system is connected with the corresponding portal frame. ; The inner shaft of the steel plate box beam side of the portal frame is equipped with a horizontal slider, the inner side of the horizontal slider is connected with the ejector rod of the horizontal hydraulic part, and the outer shaft of the horizontal slider is connected with one end of the adjustable screw rod, which can be adjusted The other end of the screw rod is connected to the inner side wall of the upper end of the prefabricated formwork of the corresponding part, and the inner side wall of the prefabricated formwork corresponding to the lower end of the adjustable screw rod and the side end of the portal frame body of the corresponding part are separated by several adjustable adjusting screw; The other side end of the portal frame body and the upper end of the portal frame body are successively provided with full scaffolding, shaping comb molds and small steel molds; Mantang scaffolding: used to support the shaping comb mold and small steel mold, the mantang scaffolding is located on the upper end and one side of the portal frame, and the one side of the mantang scaffolding is located on one side of the portal frame and the upper end of the portal frame On the I-shaped steel beam, the other side of the full hall scaffolding supports one end of the shaping comb mold, and the other end of the shaping comb mold is provided with a small steel mold; Prefabricated formwork: located on the other side of the portal frame body, the distance between the inner side wall of the upper end of the prefabricated formwork and the side wall of the corresponding part of the portal frame body is realized by horizontal sliders and horizontal hydraulic parts. The distance between the inner side wall of the middle part and the lower end and the side wall of the portal frame of the corresponding part is completed by several adjustable screw rods arranged at intervals and coordinated with horizontal hydraulic parts; Shaping comb mold: used to undertake the small steel mold, the shaping comb mold is located between the scaffolding and the small steel mold; Small steel formwork: used to support the second lining of variable cross-section tunnel located in the scaffolding part of the whole hall. 2. The movable portal-type combined formwork for the secondary lining of variable-section tunnels according to claim 1, characterized in that: said movable portal trolley is in the shape of a door font. 3. The movable portal-type combined formwork for the second lining of variable-section tunnels according to claim 1, characterized in that: the traveling device is divided into a power traveling device and a supporting traveling device, and the power traveling device is located in the portal type On both sides of the lower rear end of the stand, the supporting walking device is located on both sides of the lower front end of the portal stand, and the power walking device is to drive the portal stand and the supporting walking device. The power walking device is driven by a car body, a motor, Rail wheel, traveling rail wheel, small sprocket, large sprocket and bearing pair, the driving rail wheel and traveling rail wheel are respectively located at the rear and front of the lower part of the car body, the driving rail wheel and the rail wheel shaft in the middle of the traveling rail wheel The two ends are connected to the lower part of the car body through two bearing pairs. There is a large sprocket on the rail wheel shaft of the driving rail wheel, and a motor is fixed on the car body on the upper part of the driving rail wheel. The small sprocket is located on the motor shaft, and the motor shaft passes through The small sprocket and the chain drive the large sprocket, and the driving rail wheel and the traveling rail wheel are located on the track. 4. The movable portal formwork for the second lining of variable-section tunnels according to claim 1, characterized in that: there are reinforcing ribs between the steel plate box columns and the corresponding steel plate box beams plate. 5. The movable portal formwork for the second lining of variable-section tunnels according to claim 1, characterized in that: one end of the adjustable screw located at the lower end of the assembled formwork can be the apex with the ground. 6. The movable portal formwork for the second lining of variable-section tunnels according to claim 1, characterized in that: the position of the assembled formwork on the portal frame and the full scaffolding can be adjusted according to the needs. exchange. 7. The movable portal formwork for the secondary lining of variable-section tunnels according to claim 1, characterized in that: a ladder is provided at the rear end of the portal frame body. 8. The movable portal formwork for the secondary lining of variable-section tunnels according to claim 1, characterized in that: the two sides of the front end of the portal frame body are provided with anti-collision frames. 9. The movable portal formwork for the second lining of variable-section tunnels according to claim 1, characterized in that: reinforced channel steel columns are arranged between the adjacent steel plate box columns on each side , an oblique steel column is arranged between each steel plate box body column and the steel plate box body bottom beam. 10. The movable portal formwork for the secondary lining of variable-section tunnels according to claim 1, characterized in that: an operating platform is provided on the upper periphery of the portal frame body.