Steel frame based on mechanical full-face excavation of tunnel, and construction method thereof

Abstract

The invention discloses a steel frame based on mechanical full-face excavation of a tunnel, and a construction method thereof. The steel frame comprises an arch part grid steel frame unit and side part grid steel frame units located at two ends of the arch part grid steel frame unit, wherein the arch part grid steel frame unit and the side part grid steel frame units are hinged to be prefabricatedinto a whole structure in a factory. From the angle of force loading, according to the steel frame provided by the invention, the number of the steel frame units and connecting joints is greatly reduced, the weakening on the overall force loading strength of the steel frame is reduced maximally, the supporting intensity of the steel frame is ensured, the steel frame forms a whole, the positioningdifficulty is low and the efficiency is high after lifting, the steel frame can be directly lifted as a whole through a multi-arm steel frame installation trolley, mechanical operation is realized, the number of construction operation personnel is reduced, the construction safety is improved, a working environment for the construction personnel is favorable, the human cost and the labor intensityare saved, the operating time of a single process can be greatly reduced, the operation progress of tunnel initial supporting construction is accelerated as a whole, the economic benefit is remarkable, and the construction cost is saved.

Description

technical field

[0001] The invention relates to the field of tunnel construction, in particular to a steel frame based on tunnel mechanized full-section excavation and a construction method thereof. Background technique

[0002] At present, my country's high-speed railway mountain tunnels basically adopt a composite lining support structure, which includes primary support and secondary lining. This is an effective support method developed based on the New Austrian Method. Among them, the initial support structure is extremely important in the construction process and directly affects the construction safety. Generally, the combined structure of shotcrete and anchor net is adopted, and grid steel frame or section steel frame is installed in IV and V grade surrounding rock sections to strengthen the support. However, in the traditional tunnel construction process, limited by the theory, technology, technology, and equipment, most of them adopt the artificial multi-step constru...

Examples

Embodiment 1

[0100] Such as Figure 1-8 As shown, a steel frame based on tunnel mechanized full-section excavation according to the present invention includes an arch grid steel frame unit 1 and side grid steel frame units 2 located at both ends thereof, as well as hinged parts 3 and locking Part 4, the arch grid steel frame unit 1 and the side grid steel frame unit 2 are prefabricated into an integral structure, and the length of the arch grid steel frame unit 1 is equal to that of the side grid The length of steel frame unit 2;

[0101] Such as Figure 2-4 As shown, the end of the arch grid steel frame unit 1 is provided with a first connecting steel plate 11, such as Figure 5 As shown, the first connecting steel plate 11 is welded with four first grid main ribs 12, and a first U-shaped rib 13 is welded between two adjacent first grid main ribs 12, each of the first The bottom of the U-shaped rib 13 is welded to the first connecting steel plate 11, specifically, the thickness of the ...

Embodiment 2

[0107] Such as Figure 9-16 As shown, a steel frame based on tunnel mechanized full-section excavation according to the present invention includes an arch section steel frame unit 5 and side section steel frame units 6 located at both ends thereof, as well as hinge parts 3 and locking parts 4 , the arch section steel frame unit 5 and the side section steel frame unit 6 are prefabricated into an integral structure, the length of the arch section steel frame unit 5 is equal to the side section steel frame unit 6;

[0108] Such as Figure 10-12 As shown, the end of the arch section steel frame unit 5 is provided with a third connecting steel plate 51, and the third connecting steel plate 51 is welded with a first section steel 52, and the two sides in the length direction of the first section steel 52 are respectively welded with a second A stiffener 53, the bottom of each first stiffener 53 is welded to the third connecting steel plate 51, the first stiffening rib 53 is an angl...

Embodiment 3

[0114] Such as Figure 17-19 As shown, a kind of steel frame construction method based on tunnel mechanized full-section excavation according to the present invention comprises the following steps:

[0115] A, the factory prefabricated arch steel frame unit 7 and the side steel frame units 8 at its two ends, wherein, the arch steel frame unit 7 adopts the arch grid steel frame unit 1 as described in embodiment 1, the The side steel frame unit 8 adopts the side grid steel frame unit 2 as described in Embodiment 1;

[0116] The inner side of the arch at the end of the arch steel frame unit 7 is provided with a hinged part 3, and the hinged part 3 is connected to one end of the side steel frame unit 8, and the side steel frame unit 8 can be opposite to the arch. The steel frame unit 7 rotates 0° to 150° towards the inner side of the arch, wherein at 0°, the ends of the arch steel frame unit 7 and the side steel frame unit 8 are aligned and abutted, and the arch steel frame unit ...

technical field

[0001] The invention relates to the field of tunnel construction, in particular to a steel frame based on tunnel mechanized full-section excavation and a construction method thereof. Background technique

[0002] At present, my country's high-speed railway mountain tunnels basically adopt a composite lining support structure, which includes primary support and secondary lining. This is an effective support method developed based on the New Austrian Method. Among them, the initial support structure is extremely important in the construction process and directly affects the construction safety. Generally, the combined structure of shotcrete and anchor net is adopted, and grid steel frame or section steel frame is installed in IV and V grade surrounding rock sections to strengthen the support. However, in the traditional tunnel construction process, limited by the theory, technology, technology, and equipment, most of them adopt the artificial multi-step constru...

Examples

Embodiment 1

[0100] Such as Figure 1-8 As shown, a steel frame based on tunnel mechanized full-section excavation according to the present invention includes an arch grid steel frame unit 1 and side grid steel frame units 2 located at both ends thereof, as well as hinged parts 3 and locking Part 4, the arch grid steel frame unit 1 and the side grid steel frame unit 2 are prefabricated into an integral structure, and the length of the arch grid steel frame unit 1 is equal to that of the side grid The length of steel frame unit 2;

[0101] Such as Figure 2-4 As shown, the end of the arch grid steel frame unit 1 is provided with a first connecting steel plate 11, such as Figure 5 As shown, the first connecting steel plate 11 is welded with four first grid main ribs 12, and a first U-shaped rib 13 is welded between two adjacent first grid main ribs 12, each of the first The bottom of the U-shaped rib 13 is welded to the first connecting steel plate 11, specifically, the thickness of the ...

Embodiment 2

[0107] Such as Figure 9-16 As shown, a steel frame based on tunnel mechanized full-section excavation according to the present invention includes an arch section steel frame unit 5 and side section steel frame units 6 located at both ends thereof, as well as hinge parts 3 and locking parts 4 , the arch section steel frame unit 5 and the side section steel frame unit 6 are prefabricated into an integral structure, the length of the arch section steel frame unit 5 is equal to the side section steel frame unit 6;

[0108] Such as Figure 10-12 As shown, the end of the arch section steel frame unit 5 is provided with a third connecting steel plate 51, and the third connecting steel plate 51 is welded with a first section steel 52, and the two sides in the length direction of the first section steel 52 are respectively welded with a second A stiffener 53, the bottom of each first stiffener 53 is welded to the third connecting steel plate 51, the first stiffening rib 53 is an angl...

Embodiment 3

[0114] Such as Figure 17-19 As shown, a kind of steel frame construction method based on tunnel mechanized full-section excavation according to the present invention comprises the following steps:

[0115] A, the factory prefabricated arch steel frame unit 7 and the side steel frame units 8 at its two ends, wherein, the arch steel frame unit 7 adopts the arch grid steel frame unit 1 as described in embodiment 1, the The side steel frame unit 8 adopts the side grid steel frame unit 2 as described in Embodiment 1;

[0116] The inner side of the arch at the end of the arch steel frame unit 7 is provided with a hinged part 3, and the hinged part 3 is connected to one end of the side steel frame unit 8, and the side steel frame unit 8 can be opposite to the arch. The steel frame unit 7 rotates 0° to 150° towards the inner side of the arch, wherein at 0°, the ends of the arch steel frame unit 7 and the side steel frame unit 8 are aligned and abutted, and the arch steel frame unit ...

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