CN210564577U - Steel frame based on mechanized full-section excavation of tunnel - Google Patents
Steel frame based on mechanized full-section excavation of tunnel Download PDFInfo
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- CN210564577U CN210564577U CN201921237663.XU CN201921237663U CN210564577U CN 210564577 U CN210564577 U CN 210564577U CN 201921237663 U CN201921237663 U CN 201921237663U CN 210564577 U CN210564577 U CN 210564577U
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Abstract
The utility model discloses a steelframe based on mechanized full-section excavation in tunnel, including hunch portion grid steelframe unit and the lateral part grid steelframe unit that is located its both ends, hunch portion grid steelframe unit with lateral part grid steelframe unit is articulated to at the prefabricated overall structure that becomes of mill. From the atress angle, the steelframe, reduce steelframe unit and attach fitting quantity by a wide margin, the maximum reduction is to the weakening of the whole atress intensity of steelframe as far as possible, the steelframe is strutted intensity, the steelframe forms wholly, the location degree of difficulty is low after lifting, high efficiency, can directly wholly lift the steelframe through multi-arm steelframe installation platform truck, mechanized operations, construction operation personnel quantity has been reduced, construction safety has been improved, constructor operation environment is good, human cost and intensity of labour have been practiced thrift, can shorten the one-shot activity duration by a wide margin, the tunnel first construction operation progress has been accelerated on the whole, economic benefits is obvious, and construction cost is saved.
Description
Technical Field
The utility model relates to a tunnel construction field, in particular to steelframe based on mechanized full section excavation in tunnel and construction method thereof.
Background
At present, the mountain tunnel of the high-speed railway in China basically adopts a composite lining supporting structure, namely primary supporting and secondary lining, which is an effective supporting method developed based on the new Austrian method. Wherein, primary support structure is very important in the work progress, directly influences construction safety, generally adopts the combined structure form of spray anchor net, sets up grid steelframe or shaped steel steelframe in IV, V level country rock section and strengthens strutting. However, in the traditional tunnel construction process, limited by the influence of theory, technology, process and equipment, a manual multi-step subsection construction method is mostly adopted, namely, the section of the tunnel is divided into a plurality of parts and a plurality of steps for excavation and supporting, and one part of the support is excavated during construction. The steel frame is strutted in the installation preliminary stage generally adopts manual work, is about to divide into a plurality of units in the whole ring steelframe of tunnel, and every unit adopts the joint to connect into a whole, and the joint generally comprises steel sheet and bolt.
At present, when tunnel steelframe was installed, because steelframe weight is great, labour intensity restriction during manual installation had to divide into a plurality of units with the whole ring steelframe, and general arch wall steelframe divide into more than 7 units, and every unit all adopts the manual work construction.
1. From the atress angle, steelframe unit and connection structure are too much, have destroyed the wholeness of steelframe, have weakened the support intensity of steelframe, easily take place to warp at connection structure department even destroy.
2. When the steel frame is installed, because the weight is large, a plurality of operators are generally required to operate together, the operation environment is extremely poor, and the construction safety is difficult to guarantee.
At present, although steel frame installation trolleys are tested in few cases for mechanical construction operation, a plurality of mechanical arms are adopted to independently lift steel frame units respectively, the steel frame unit connecting structures are aligned through a positioning system, and then operating personnel are lifted to connect the steel frame units through bolts so as to complete the assembling operation of the whole ring of steel frames. However, the construction method has high precision requirement on mechanical construction, so that the construction efficiency is low, the single-process operation time is long, the economy is poor, the cost is high, and the advantages of mechanical construction cannot be exerted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the tunnel construction preliminary bracing steelframe that exists among the prior art and pass through the artifical installation of arm cooperation, the required precision of construction is high, and the efficiency of construction is low, and the single process time is longer, and the economic nature is relatively poor, and the higher above-mentioned is not enough of cost provides a steelframe based on the mechanized full-section excavation of tunnel and construction method thereof.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a steel frame based on tunnel mechanized full-face excavation comprises an arch grid steel frame unit and side grid steel frame units positioned at two ends of the arch grid steel frame unit, wherein the arch grid steel frame unit and the side grid steel frame units are prefabricated into an integral structure in a factory;
the end part of the arch part grid steel frame unit is provided with a first connecting steel plate, the first connecting steel plate is connected with a plurality of first grid main ribs, a first U-shaped rib is connected between every two adjacent first grid main ribs, and the bottom of each first U-shaped rib is connected to the first connecting steel plate;
one end of each side grid steel frame unit is provided with a second connecting steel plate, the second connecting steel plate is connected with a plurality of second grid main ribs, a second U-shaped rib is connected between every two adjacent second grid main ribs, and the bottom of each second U-shaped rib is connected to the second connecting steel plate;
still include articulated part and locking part, articulated part connect in first connecting steel plate with the second connecting steel plate, locking part is used for first connecting steel plate with the locking after the second connecting steel plate rotates the butt is connected, lateral part grid steelframe unit can be relative arch portion grid steelframe unit is rotated 0 to 150 towards the arch inboard.
From the atress angle, a steelframe based on tunnel mechanization full-section excavation, reduce steelframe unit and attach fitting quantity by a wide margin, the maximum reduction to the weakening of the whole atress intensity of steelframe as far as possible, the intensity is strutted to the steelframe has been guaranteed, the steelframe forms wholly, the location degree of difficulty is low after lifting, high efficiency, can directly wholly lift the steelframe through multi-arm steelframe installation platform truck, mechanized operation, construction operation personnel's quantity has been reduced, construction safety has been improved, constructor operation environment is good, human cost and intensity of labour have been practiced thrift, single process operating time can be shortened by a wide margin, the tunnel is accelerated just to prop up construction operation progress on the whole, economic benefits is obvious, construction cost is practiced thrift.
Preferably, the length of the arch grid steel frame unit is equal to the length of the side grid steel frame unit.
Preferably, the first grid main rib is welded to the first connection steel plate.
Preferably, the first U-shaped bead is welded to the first grid main bead and the first connection steel plate, respectively.
Preferably, the second grid main rib is welded to the second connection steel plate.
Preferably, the second U-shaped rib is welded to the second grid main rib and the second connection steel plate, respectively.
Preferably, the thickness of said first connection steel plate is greater than or equal to 1 cm.
Preferably, the thickness of the second connection steel plate is greater than or equal to 1 cm.
Preferably, the thickness of the first connection steel plate is equal to the thickness of the second connection steel plate.
Preferably, the articulated part includes first sleeve and second sleeve, the both ends of second sleeve align respectively and are equipped with two first sleeve, first sleeve with be equipped with the pivot in the second sleeve, first sleeve connect in first connecting steel plate, the second sleeve connect in the second connecting steel plate, the articulated part is located the arch inboard, is located this steelframe promptly and leans on lining one side.
Further preferably, the total length of the first sleeve and the second sleeve is greater than or equal to 5 cm.
Further preferably, the pipe diameter of the first sleeve and the second sleeve is 2-4 times of the thickness of the first connecting steel plate or the thickness of the second connecting steel plate.
Further preferably, the first sleeve has a length LAThe length of the second sleeve is LBAnd L isA＜LB＜2LA。
Further preferably, the rotating shaft comprises a connecting screw rod, a nut and a gasket, the nut and the gasket are matched with the connecting screw rod, and two gaskets are respectively arranged at two ends of a sleeve formed by the second sleeve and the two first sleeves.
Further preferably, the first sleeve is welded to the first connection steel plate.
Further preferably, the second sleeve is welded to the second connecting steel plate.
Further preferably, a first sleeve stiffening rib is arranged between the first sleeve and the first connecting steel plate, and a second sleeve stiffening rib is arranged between the second sleeve and the second connecting steel plate.
Further preferably, the first sleeve stiffener is welded to the first sleeve and the first connection steel plate, respectively.
Further preferably, the second sleeve stiffener is welded to the second sleeve and the second connection steel plate, respectively.
Preferably, the locking member includes a plurality of bolts and nuts fitted thereto.
Further preferably, evenly be equipped with the first through-hole of a plurality of on the first connecting steel plate, be equipped with on the second connecting steel plate with the second through-hole of first through-hole adaptation, first connecting steel plate with the second connecting steel plate rotates the butt back, the bolt passes first through-hole with the second through-hole and by nut locking.
Further preferably, the bolt is a high-strength bolt.
The utility model also provides a steel frame based on tunnel mechanized full-section excavation, which comprises an arch section steel frame unit and side section steel frame units positioned at two ends of the arch section steel frame unit, wherein the arch section steel frame unit and the side section steel frame units are prefabricated into an integral structure in a factory;
the end part of the arch section steel frame unit is provided with a third connecting steel plate, the third connecting steel plate is connected with first section steel, two sides of the first section steel in the length direction are respectively connected with a first stiffening rib, and the bottom of each first stiffening rib is connected with the third connecting steel plate;
one end of the lateral section steel frame unit is provided with a fourth connecting steel plate, the fourth connecting steel plate is connected with second section steel, two sides of the second section steel in the length direction are respectively connected with second stiffening ribs, and the bottom of each second stiffening rib is connected to the fourth connecting steel plate;
still include articulated part and locking part, articulated part connect in third connecting steel plate with fourth connecting steel plate, locking part is used for third connecting steel plate with the locking after the fourth connecting steel plate rotates the butt is connected, lateral part shaped steel steelframe unit can be relative arch portion shaped steel steelframe unit is rotated 0 to 150 towards the arch inboard.
From the atress angle, a steelframe based on tunnel mechanization full-section excavation, reduce steelframe unit and attach fitting quantity by a wide margin, the maximum reduction to the weakening of the whole atress intensity of steelframe as far as possible, the intensity is strutted to the steelframe has been guaranteed, the steelframe forms wholly, the location degree of difficulty is low after lifting, high efficiency, can directly wholly lift the steelframe through multi-arm steelframe installation platform truck, mechanized operation, construction operation personnel's quantity has been reduced, construction safety has been improved, constructor operation environment is good, human cost and intensity of labour have been practiced thrift, single process operating time can be shortened by a wide margin, the tunnel is accelerated just to prop up construction operation progress on the whole, economic benefits is obvious, construction cost is practiced thrift.
Preferably, the length of the arch section steel frame unit is equal to that of the side section steel frame unit.
Preferably, the first section steel is welded to the third connecting steel plate.
Preferably, the first stiffener is welded to the first section steel and the third connecting steel plate, respectively.
Preferably, the second type steel is welded to the fourth connection steel plate.
Preferably, the second reinforcing ribs are welded to the second section steel and the fourth connecting steel plate, respectively.
Preferably, the first stiffening rib and the second stiffening rib are both angle steels.
Preferably, the thickness of the third connecting steel plate is greater than or equal to 1 cm.
Preferably, the thickness of the fourth connection steel plate is greater than or equal to 1 cm.
Preferably, the thickness of the third connecting steel plate is equal to the thickness of the fourth connecting steel plate.
Preferably, the articulated part includes first sleeve and second sleeve, the both ends of second sleeve align respectively and are equipped with two first sleeve, first sleeve with be equipped with the pivot in the second sleeve, first sleeve connect in the third connecting steel plate, the second sleeve connect in the fourth connecting steel plate, the articulated part is located the arch inboard, is located this steelframe promptly and leans on lining one side.
Further preferably, the total length of the first sleeve and the second sleeve is greater than or equal to 5 cm.
Further preferably, the pipe diameter of the first sleeve and the second sleeve is 2-4 times of the thickness of the third connecting steel plate or the thickness of the fourth connecting steel plate.
Further preferably, the first sleeve has a length LAThe length of the second sleeve is LBAnd L isA＜LB＜2LA。
Further preferably, the rotating shaft comprises a connecting screw rod, a nut and a gasket, the nut and the gasket are matched with the connecting screw rod, and two gaskets are respectively arranged at two ends of a sleeve formed by the second sleeve and the two first sleeves.
Further preferably, the first sleeve is welded to the third connecting steel plate.
Further preferably, the second sleeve is welded to the fourth connecting steel plate.
Further preferably, a first sleeve stiffening rib is arranged between the first sleeve and the third connecting steel plate, and a second sleeve stiffening rib is arranged between the second sleeve and the fourth connecting steel plate.
Further preferably, the first sleeve stiffener is welded to the first sleeve and the third connector plate, respectively.
Further preferably, the second sleeve stiffener is welded to the second sleeve and the fourth connecting steel plate, respectively.
Preferably, the locking member includes a plurality of bolts and nuts fitted thereto.
Further preferably, the third connecting steel plate is evenly provided with a plurality of third through holes, the fourth connecting steel plate is provided with a fourth through hole matched with the third through hole, and after the third connecting steel plate and the fourth connecting steel plate rotate to be abutted, the bolt penetrates through the third through hole and the fourth through hole and is locked by the nut.
Further preferably, the bolt is a high-strength bolt.
The utility model also provides a construction method of steelframe based on tunnel mechanized full-face excavation, including following step:
A. the method comprises the following steps that an arch steel frame unit and side steel frame units positioned at two ends of the arch steel frame unit are prefabricated in a factory, a hinge component is arranged on the inner side of an arch at the end part of the arch steel frame unit, the hinge component is connected with one end of the side steel frame unit, the side steel frame unit can rotate towards the inner side of the arch relative to the arch steel frame unit by 0-150 degrees, the end parts of the arch steel frame unit and the side steel frame unit are aligned and abutted at 0 degree, the arch steel frame unit and the side steel frame unit are locked and connected through a locking component when the arch steel frame unit and the side steel frame unit rotate to 0 degree, and whether the design outline requirement is met is checked;
B. the two side steel frame units are rotated and folded towards the inner side of the arch along the hinge parts, the occupied space is reduced, and the intersection of the two side steel frame units is detachably fixed;
C. transporting the steel frame to a full-section excavated tunnel face;
D. the fixation is released, the folded side steel frame units are rotated and unfolded, so that the connecting line of the gravity center of the side steel frame units and the connecting position is parallel to the center line of the tunnel, and the shaking during the hoisting is reduced;
E. the vault of the arch steel frame unit is grabbed, the side steel frame unit is grabbed and gradually jacked to a design area, and the arch steel frame unit and the side steel frame unit are aligned;
F. and the locking component is adopted to relatively lock the arch steel frame unit and the side steel frame unit, so that the arch steel frame unit and the side steel frame unit form a whole to bear force.
When the arch steel frame unit is the arch grid steel frame unit, the side steel frame unit is the side grid steel frame unit, and when the arch steel frame unit is the arch section steel frame unit, the side steel frame unit is the side section steel frame unit.
A construction method based on steelframe of tunnel mechanized full-section excavation, the mill is whole prefabricated, can fold convenient transportation between hunch portion steelframe unit and the lateral part steelframe unit, lateral part steelframe unit rotates the line that expandes focus in maturity and junction and is parallel with the tunnel central line, it rocks to reduce to lift by crane, guarantee to lift by crane safety, through the direct whole location steelframe that lifts by crane of multi-arm steelframe installation platform truck, mechanized operation, high efficiency, construction operation personnel quantity has been reduced, construction safety has been improved, constructor work environment is good, human cost and intensity of labour have been practiced thrift, can shorten the single process activity time by a wide margin, accelerated the tunnel first construction operation progress on the whole, economic benefits is obvious, construction cost has been practiced thrift.
Preferably, in the step E, a multi-arm steel frame installation trolley is adopted, the arches of the arch steel frame units are grabbed and lifted by one of the mechanical arms, and the side steel frame units are grabbed and gradually jacked to the design area by one of the mechanical arms.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. from the stress angle, the utility model discloses a steel frame based on tunnel mechanized full-section excavation, reduce steelframe unit and connector quantity by a wide margin, reduce the weakening to the whole stress intensity of steelframe to the utmost, guaranteed steelframe supporting strength, the steelframe forms wholly, the location degree of difficulty is low after lifting, high efficiency, can directly wholly lift the steelframe through multi-arm steelframe installation platform truck, mechanized operation, the construction operation personnel quantity has been reduced, construction safety has been improved, constructor's operational environment is good, human cost and intensity of labour have been practiced thrift, single process operating time can be shortened by a wide margin, tunnel first support construction operation progress has been accelerated on the whole, economic benefits is obvious, construction cost has been practiced thrift;
2. a construction method based on steelframe of tunnel mechanized full-section excavation, the mill is whole prefabricated, can fold convenient transportation between hunch portion steelframe unit and the lateral part steelframe unit, lateral part steelframe unit rotates the line that expandes focus in maturity and junction and is parallel with the tunnel central line, it rocks to reduce to lift by crane, guarantee to lift by crane safety, through the direct whole location steelframe that lifts by crane of multi-arm steelframe installation platform truck, mechanized operation, high efficiency, construction operation personnel quantity has been reduced, construction safety has been improved, constructor work environment is good, human cost and intensity of labour have been practiced thrift, can shorten the single process activity time by a wide margin, accelerated the tunnel first construction operation progress on the whole, economic benefits is obvious, construction cost has been practiced thrift.
Drawings
Fig. 1 is a schematic structural view of a steel frame according to embodiment 1;
FIG. 2 is a schematic structural view of an arch grid steel frame unit and a side grid steel frame unit in embodiment 1;
FIG. 3 is a schematic view showing the connection of the arch grid steel frame unit and the side grid steel frame unit in embodiment 1;
FIG. 4 is a schematic view showing the rotation of the arch grid steel frame unit and the side grid steel frame unit in embodiment 1;
FIG. 5 is a schematic plan view of an arch grid steel frame unit in embodiment 1;
FIG. 6 is a schematic plan view of a side grid steel frame unit according to embodiment 1;
FIG. 7 is a schematic structural view of a rotary shaft in embodiment 1;
FIG. 8 is a schematic view showing the connection of the first sleeve and the second sleeve in embodiment 1;
FIG. 9 is a schematic structural view of the steel frame of embodiment 2;
FIG. 10 is a schematic structural view of an arch-type steel-frame unit and a side-type steel-frame unit according to example 2;
FIG. 11 is a schematic view showing the connection of an arch-type steel-frame unit and a side-type steel-frame unit in example 2;
FIG. 12 is a schematic view showing the rotation of the arch section steel-frame unit and the side section steel-frame unit in example 2;
FIG. 13 is a schematic plan view showing the structure of an arch-type steel-frame unit according to example 2;
FIG. 14 is a schematic plan view showing the structure of a side section steel-frame unit according to example 2;
FIG. 15 is a schematic structural view of a rotary shaft in embodiment 2;
FIG. 16 is a schematic view showing the connection of the first sleeve and the second sleeve in embodiment 2;
FIG. 17 is a schematic illustration showing the configuration of the arch steel frame unit and the side steel frame unit in accordance with embodiment 3;
FIG. 18 is a schematic view showing the configuration of the arch steel frame unit and the side steel frame unit in accordance with example 3;
FIG. 19 is a schematic structural view showing the connection of the crown steel frame units and the side steel frame units in the top support of embodiment 3;
FIG. 20 is a schematic view showing the configuration of the arch steel frame unit and the side steel frame unit in accordance with embodiment 4;
FIG. 21 is a schematic view of the configuration of the arch steel frame unit and the side steel frame unit in accordance with example 4;
FIG. 22 is a schematic structural view of the top stay connection of the arch steel frame unit and the side steel frame unit in embodiment 4.
The labels in the figure are: 1-arch grid steel frame unit, 11-first connecting steel plate, 12-first grid main rib, 13-first U-shaped rib, 2-side grid steel frame unit, 21-second connecting steel plate, 22-second grid main rib, 23-second U-shaped rib, 3-hinge part, 31-first sleeve, 32-second sleeve, 33-rotating shaft, 34-first sleeve stiffener, 35-second sleeve stiffener, 4-locking part, 5-arch steel frame unit, 51-third connecting steel plate, 52-first section steel, 53-first stiffener, 6-side section steel frame unit, 61-fourth connecting steel plate, 62-second section steel, 63-second stiffener, 7-arch steel frame unit, 8-side steel frame unit.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-8, the steel frame based on tunnel mechanized full-face excavation according to the present invention comprises an arch grid steel frame unit 1, a side grid steel frame unit 2 at two ends of the arch grid steel frame unit, a hinge component 3 and a locking component 4, wherein the arch grid steel frame unit 1 and the side grid steel frame unit 2 are prefabricated into an integral structure in a factory, and the length of the arch grid steel frame unit 1 is equal to the length of the side grid steel frame unit 2;
as shown in fig. 2 to 4, a first connecting steel plate 11 is arranged at an end of the arch grid steel frame unit 1, as shown in fig. 5, four first grid main ribs 12 are welded to the first connecting steel plate 11, a first U-shaped rib 13 is welded between two adjacent first grid main ribs 12, the bottom of each first U-shaped rib 13 is welded to the first connecting steel plate 11, and specifically, the thickness of the first connecting steel plate 11 is equal to 1 cm;
as shown in fig. 2 to 4, one end of the side grid steel frame unit 2 is provided with a second connection steel plate 21, as shown in fig. 6, four second grid main ribs 22 are welded to the second connection steel plate 21, a second U-shaped rib 23 is welded between two adjacent second grid main ribs 22, the bottom of each second U-shaped rib 23 is welded to the second connection steel plate 21, and specifically, the thickness of the second connection steel plate 21 is equal to the thickness of the first connection steel plate 11;
as shown in fig. 2 to 8, the hinge part 3 is connected to the first connecting steel plate 11 and the second connecting steel plate 21, the hinge part 3 includes a first sleeve 31 and a second sleeve 32, two ends of the second sleeve 32 are respectively aligned with the first sleeve 31, a rotating shaft 33 is arranged in the first sleeve 31 and the second sleeve 32, the first sleeve 31 is welded to the first connecting steel plate 11, the second sleeve 32 is welded to the second connecting steel plate 21, and the hinge part 3 is located on the inner side of the arch, i.e. on the side of the steel frame facing the lining; the total length of the first sleeve 31 and the second sleeve 32 is greater than or equal to 5cm, and the length of the first sleeve 31 is LAThe second sleeve 32 has a length LBAnd L isA＜LB＜2LASaid first sleeve 31 and said second sleeveThe pipe diameter of the sleeve 32 is 2 times of the thickness of the first connecting steel plate 11 or the second connecting steel plate 21; a first sleeve stiffening rib 34 is arranged between the first sleeve 31 and the first connecting steel plate 11, a second sleeve stiffening rib 35 is arranged between the second sleeve 32 and the second connecting steel plate 21, the first sleeve stiffening rib 34 is welded to the first sleeve 31 and the first connecting steel plate 11 respectively, and the second sleeve stiffening rib 35 is welded to the second sleeve 32 and the second connecting steel plate 21 respectively; specifically, the rotating shaft 33 includes a connecting screw, and a nut and a gasket adapted to the connecting screw, and two gaskets are respectively disposed at two ends of a sleeve formed by the second sleeve 32 and the two first sleeves 31.
As shown in fig. 2 to 8, the locking component 4 is used for locking and connecting the first connection steel plate 11 and the second connection steel plate 21 after rotating and abutting against each other, the side grid steel frame unit 2 can rotate 0 ° to 150 ° towards the inner side of the arch with respect to the arch grid steel frame unit 1, specifically, the locking component 4 includes a plurality of bolts and nuts adapted to the bolts, a plurality of first through holes are uniformly formed in the first connection steel plate 11, second through holes adapted to the first through holes are formed in the second connection steel plate 21, after the first connection steel plate 11 and the second connection steel plate 21 rotate and abut against each other, the bolts pass through the first through holes and the second through holes and are locked by the nuts, and the bolts are high-strength bolts.
From the atress angle, a steelframe based on tunnel mechanization full-section excavation, reduce steelframe unit and attach fitting quantity by a wide margin, the maximum reduction to the weakening of the whole atress intensity of steelframe as far as possible, the intensity is strutted to the steelframe has been guaranteed, the steelframe forms wholly, the location degree of difficulty is low after lifting, high efficiency, can directly wholly lift the steelframe through multi-arm steelframe installation platform truck, mechanized operation, construction operation personnel's quantity has been reduced, construction safety has been improved, constructor operation environment is good, human cost and intensity of labour have been practiced thrift, single process operating time can be shortened by a wide margin, the tunnel is accelerated just to prop up construction operation progress on the whole, economic benefits is obvious, construction cost is practiced thrift.
Example 2
As shown in fig. 9-16, the steel frame based on tunnel mechanized full-face excavation according to the present invention includes an arch section steel frame unit 5, a side section steel frame unit 6 at two ends of the arch section steel frame unit, a hinge component 3 and a locking component 4, wherein the arch section steel frame unit 5 and the side section steel frame unit 6 are prefabricated into an integral structure in a factory, and the length of the arch section steel frame unit 5 is equal to that of the side section steel frame unit 6;
as shown in fig. 10-12, a third connecting steel plate 51 is arranged at an end of the arch section steel frame unit 5, the third connecting steel plate 51 is welded with a first section steel 52, first stiffening ribs 53 are respectively welded on two sides of the first section steel 52 in the length direction, the bottom of each first stiffening rib 53 is welded with the third connecting steel plate 51, the first stiffening ribs 53 are angle steels, and the thickness of the third connecting steel plate 51 is equal to 1 cm;
as shown in fig. 10 to 12, one end of the side section steel frame unit 6 is provided with a fourth connecting steel plate 61, the fourth connecting steel plate 61 is welded with a second section steel 62, two sides of the second section steel 62 in the length direction are respectively welded with a second stiffening rib 63, the bottom of each second stiffening rib 63 is welded to the fourth connecting steel plate 61, the second stiffening ribs 63 are angle steels, and the thickness of the fourth connecting steel plate 61 is equal to the thickness of the third connecting steel plate 51;
as shown in fig. 10 to 16, the hinge member 3 is connected to the third connecting steel plate 51 and the fourth connecting steel plate 61, the hinge member 3 includes a first sleeve 31 and a second sleeve 32, two ends of the second sleeve 32 are respectively aligned with the first sleeve 31, a rotating shaft 33 is arranged in the first sleeve 31 and the second sleeve 32, the first sleeve 31 is welded to the third connecting steel plate 51, the second sleeve 32 is welded to the fourth connecting steel plate 61, and the hinge member 3 is located on the inner side of the arch, i.e. on the side of the steel frame facing the lining; the total length of the first sleeve 31 and the second sleeve 32 is greater than or equal to 5cm, and the length of the first sleeve 31 is LAThe second sleeve 32 has a length LBAnd L isA＜LB＜2LASaid first isThe pipe diameter size of the sleeve 31 and the second sleeve 32 is 2 times of the thickness of the third connecting steel plate 51 or the thickness of the fourth connecting steel plate 61; a first sleeve stiffening rib 34 is arranged between the first sleeve 31 and the first connecting steel plate 11, a second sleeve stiffening rib 35 is arranged between the second sleeve 32 and the second connecting steel plate 21, the first sleeve stiffening rib 34 is welded to the first sleeve 31 and the third connecting steel plate 51 respectively, and the second sleeve stiffening rib 35 is welded to the second sleeve 32 and the fourth connecting steel plate 61 respectively; specifically, the rotating shaft 33 includes a connecting screw, and a nut and a gasket adapted to the connecting screw, and two gaskets are respectively disposed at two ends of a sleeve formed by the second sleeve 32 and the two first sleeves 31.
As shown in fig. 10 to 16, the locking component 4 is used for locking connection after the third connecting steel plate 51 and the fourth connecting steel plate 61 are rotated and abutted, the side section steel frame unit 6 can be rotated 0 ° to 150 ° towards the inner side of the arch relative to the arch section steel frame unit 5, specifically, the locking component 4 includes a plurality of bolts and nuts adapted thereto, the third connecting steel plate 51 is uniformly provided with a plurality of third through holes, the fourth connecting steel plate 61 is provided with fourth through holes adapted to the third through holes, after the third connecting steel plate 51 and the fourth connecting steel plate 61 are rotated and abutted, the bolts pass through the third through holes and the fourth through holes and are locked by the nuts, and the bolts are high-strength bolts.
From the atress angle, a steelframe based on tunnel mechanization full-section excavation, reduce steelframe unit and attach fitting quantity by a wide margin, the maximum reduction to the weakening of the whole atress intensity of steelframe as far as possible, the intensity is strutted to the steelframe has been guaranteed, the steelframe forms wholly, the location degree of difficulty is low after lifting, high efficiency, can directly wholly lift the steelframe through multi-arm steelframe installation platform truck, mechanized operation, construction operation personnel's quantity has been reduced, construction safety has been improved, constructor operation environment is good, human cost and intensity of labour have been practiced thrift, single process operating time can be shortened by a wide margin, the tunnel is accelerated just to prop up construction operation progress on the whole, economic benefits is obvious, construction cost is practiced thrift.
Example 3
As shown in fig. 17-19, the utility model discloses a steel frame construction method based on mechanized full section excavation in tunnel, including following step:
A. the method comprises the following steps of prefabricating an arch steel frame unit 7 and side steel frame units 8 at two ends of the arch steel frame unit 7 in a factory, wherein the arch steel frame unit 7 is the arch grid steel frame unit 1 in embodiment 1, and the side steel frame unit 8 is the side grid steel frame unit 2 in embodiment 1;
the inner side of the arch part of the end part of the arch part steel frame unit 7 is provided with a hinge part 3, the hinge part 3 is connected with one end of the side part steel frame unit 8, the side part steel frame unit 8 can rotate 0-150 degrees towards the inner side of the arch part relative to the arch part steel frame unit 7, wherein the end parts of the arch part steel frame unit 7 and the side part steel frame unit 8 are aligned and abutted at 0 degree, the arch part steel frame unit 7 and the side part steel frame unit 8 are locked and connected through a locking part 4 when the arch part steel frame unit 7 and the side part steel frame unit 8 rotate to 0 degree, and whether the design outline requirement is met is checked;
B. as shown in fig. 17, the two side steel frame units 8 are folded along the hinge component 3 toward the inside of the arch, so as to reduce the occupied space, and the intersection of the two side steel frame units 8 is bound and fixed by the steel bars, so as to prevent the side steel frame units 8 from freely moving, specifically, the diameter of the steel bars is 6-8 mm;
C. transporting the steel frame to a full-section excavated tunnel face, and unloading the steel frame;
D. as shown in fig. 18, the steel bar binding is released, the folded side steel frame unit 8 is rotated and unfolded, so that the connecting line of the center of gravity a of the side steel frame unit 8 and the connecting position is parallel to the center line of the tunnel, and the shaking during the hoisting is reduced;
E. as shown in fig. 19, a multi-arm steel frame mounting trolley is used, the arches of the arch steel frame units 7 are lifted by one of the mechanical arms, as shown in the area B in fig. 19, the side steel frame units 8 are lifted by one of the mechanical arms, as shown in the area C in fig. 19, and the side steel frame units 8 are gradually propped up to the design area, so that the arch steel frame units 7 and the side steel frame units 8 are aligned;
F. the locking part 4 is adopted to lock the arch steel frame unit 7 and the side steel frame unit 8 relatively, so that the arch steel frame unit 7 and the side steel frame unit 8 form a whole to bear force.
Application a construction method based on steelframe of tunnel mechanized full-section excavation, the mill is whole prefabricated, can fold convenient transportation between hunch portion steelframe unit 7 and the lateral part steelframe unit 8, lateral part steelframe unit 8 rotates the line that expandes focus in maturity and junction and tunnel central line parallel, it rocks to reduce to lift by crane, guarantee to lift by crane safety, through direct whole location steelframe that lifts by crane of multi-arm steelframe installation platform truck, mechanized operation, high efficiency, construction operation personnel quantity has been reduced, construction safety has been improved, constructor work environment is good, human cost and intensity of labour have been practiced thrift, can shorten the single process activity time by a wide margin, accelerated tunnel first-support construction operation progress on the whole, economic benefits is obvious, construction cost has been practiced thrift.
Example 4
As shown in fig. 20-22, the difference between the construction method of steel frame based on tunnel mechanized full face excavation of the present invention and embodiment 3 is that the arch steel frame unit 7 in this embodiment is the arch section steel frame unit 5 in embodiment 2, and the side steel frame unit 8 is the side section steel frame unit 6 in embodiment 2.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The steel frame based on tunnel mechanized full-face excavation is characterized by comprising an arch grid steel frame unit (1) and side grid steel frame units (2) positioned at two ends of the arch grid steel frame unit, wherein the arch grid steel frame unit (1) and the side grid steel frame units (2) are prefabricated into an integral structure in a factory;
a first connecting steel plate (11) is arranged at the end part of the arch part grid steel frame unit (1), the first connecting steel plate (11) is connected with a plurality of first grid main ribs (12), a first U-shaped rib (13) is connected between every two adjacent first grid main ribs (12), and the bottom of each first U-shaped rib (13) is connected to the first connecting steel plate (11);
one end of each side grid steel frame unit (2) is provided with a second connecting steel plate (21), the second connecting steel plates (21) are connected with a plurality of second grid main ribs (22), a second U-shaped rib (23) is connected between every two adjacent second grid main ribs (22), and the bottom of each second U-shaped rib (23) is connected to the second connecting steel plate (21);
still include articulated parts (3) and locking part (4), articulated parts (3) connect in first connecting steel plate (11) with second connecting steel plate (21), locking part (4) are used for first connecting steel plate (11) with the locking after second connecting steel plate (21) rotate the butt is connected, side portion grid steelframe unit (2) can be relative arch portion grid steelframe unit (1) is rotated 0 to 150 towards the arch inboard.
2. The steel frame according to claim 1, characterized in that the hinge part (3) comprises a first sleeve (31) and a second sleeve (32), two first sleeves (31) are respectively arranged at two ends of the second sleeve (32) in alignment, a rotating shaft (33) is arranged in each of the first sleeve (31) and the second sleeve (32), the first sleeves (31) are connected to the first connecting steel plates (11), the second sleeves (32) are connected to the second connecting steel plates (21), and the hinge part (3) is located on the inner side of an arch.
3. A steel frame according to claim 2, characterized in that a first sleeve stiffener (34) is provided between the first sleeve (31) and the first connection steel plate (11), and a second sleeve stiffener (35) is provided between the second sleeve (32) and the second connection steel plate (21).
4. A steel frame according to claim 1, characterised in that the length of the arch grid steel frame unit (1) is equal to the length of the side grid steel frame unit (2).
5. A steel frame according to any one of claims 1-4, characterised in that the locking member (4) comprises a number of bolts and nuts adapted thereto.
6. A steel frame based on tunnel mechanized full-face excavation is characterized by comprising an arch section steel frame unit (5) and side section steel frame units (6) positioned at two ends of the arch section steel frame unit, wherein the arch section steel frame unit (5) and the side section steel frame units (6) are prefabricated into an integral structure in a factory;
a third connecting steel plate (51) is arranged at the end part of the arch section steel frame unit (5), the third connecting steel plate (51) is connected with first section steel (52), two sides of the first section steel (52) in the length direction are respectively connected with first stiffening ribs (53), and the bottom of each first stiffening rib (53) is connected with the third connecting steel plate (51);
one end of the side section steel frame unit (6) is provided with a fourth connecting steel plate (61), the fourth connecting steel plate (61) is connected with second section steel (62), two sides of the second section steel (62) in the length direction are respectively connected with second stiffening ribs (63), and the bottom of each second stiffening rib (63) is connected with the fourth connecting steel plate (61);
still include articulated parts (3) and locking part (4), articulated parts (3) connect in third connecting steel plate (51) with fourth connecting steel plate (61), locking part (4) are used for locking connection after third connecting steel plate (51) and fourth connecting steel plate (61) rotate the butt, side shaped steel steelframe unit (6) can be relative hunch portion shaped steel steelframe unit (5) are rotated 0 to 150 towards the hunch inboard.
7. The steel frame according to claim 6, characterized in that the hinge part (3) comprises a first sleeve (31) and a second sleeve (32), two first sleeves (31) are respectively arranged at two ends of the second sleeve (32) in alignment, a rotating shaft (33) is arranged in each of the first sleeve (31) and the second sleeve (32), the first sleeve (31) is connected to the third connecting steel plate (51), the second sleeve (32) is connected to the fourth connecting steel plate (61), and the hinge part (3) is located on the inner side of the arch.
8. The steel frame of claim 7, wherein a first sleeve stiffener (34) is provided between the first sleeve (31) and the third connector plate (51), and a second sleeve stiffener (35) is provided between the second sleeve (32) and the fourth connector plate (61).
9. A steel frame according to claim 6, characterised in that the length of the arch section steel frame unit (5) is equal to the length of the side section steel frame unit (6).
10. A steel frame according to any one of claims 6-9, characterised in that the locking member (4) comprises a number of bolts and nuts adapted thereto.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921237663.XU CN210564577U (en) | 2019-08-01 | 2019-08-01 | Steel frame based on mechanized full-section excavation of tunnel |
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| CN201921237663.XU CN210564577U (en) | 2019-08-01 | 2019-08-01 | Steel frame based on mechanized full-section excavation of tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318785A (en) * | 2019-08-01 | 2019-10-11 | 中铁二院成都勘察设计研究院有限责任公司 | A kind of steelframe and its construction method based on tunnel machine full face tunneling |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318785A (en) * | 2019-08-01 | 2019-10-11 | 中铁二院成都勘察设计研究院有限责任公司 | A kind of steelframe and its construction method based on tunnel machine full face tunneling |
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