CN111395166A - Tied arch bridge arch rib installation construction method - Google Patents
Tied arch bridge arch rib installation construction method Download PDFInfo
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- CN111395166A CN111395166A CN202010115878.5A CN202010115878A CN111395166A CN 111395166 A CN111395166 A CN 111395166A CN 202010115878 A CN202010115878 A CN 202010115878A CN 111395166 A CN111395166 A CN 111395166A
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- arch rib
- arch
- column
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- piston
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
Abstract
The invention discloses a tie-rod arch bridge arch rib installation construction method, wherein pre-assembly is carried out before arch ribs are assembled on a construction site, the arch ribs conveyed to the construction site are ensured to meet construction requirements, the construction progress is ensured, the assembling and positioning accuracy of the arch ribs on the construction site is high, and the assembling quality is ensured. When the tied arch bridge arch rib is installed, a plurality of sections of arch rib sections required by assembling the arch rib are processed in a factory, and the size of each arch rib section meets the design requirement of the arch rib. After the arch rib section is processed, scanning is firstly carried out, the scanned arch rib section is simulated and assembled on a computer, the pre-assembled scanning model is compared with a BIM three-dimensional model constructed on the computer, places which are not in accordance with the BIM three-dimensional model are found out, and the corresponding arch rib sections in the places are trimmed. The construction site of the arch rib section conveying belt which does not meet the design requirements is avoided, so that the arch rib section is found to be not meeting the requirements in the formal assembling process, and the normal construction progress is influenced.
Description
Technical Field
The invention relates to an arch bridge construction technology, in particular to a tie rod arch bridge arch rib installation construction method.
Background
The tied arch bridge as one member of arch bridge family has the common features of arch bridge and unique features. The bridge integrates the advantages of an arch and a beam, combines two basic structural forms of the arch and the beam together to bear load together, gives full play to the structural performance and the combination effect of bending and pressing the beam, and bears the horizontal thrust of an arch end by using a pull rod so that a support of the arch end does not generate the horizontal thrust. The installation of the arch rib is required in the process of the tied arch bridge construction, the arch rib is generally processed in the existing factory and then transferred to the construction site for assembly, but sometimes, when the site construction is carried out, a certain section of arch rib does not meet the construction requirement, so that the section of arch rib needs to be replaced, and the construction period is greatly prolonged. Moreover, when the arch rib is assembled on the construction site, the positioning is inconvenient, the assembling precision is low, and the assembling quality is influenced.
Disclosure of Invention
In order to overcome the defects, the invention provides the installation and construction method of the arch rib of the tied-rod arch bridge, the arch rib is pre-assembled before being assembled on a construction site, the arch rib conveyed to the construction site is ensured to meet the construction requirements, the construction progress is ensured, the assembling and positioning accuracy of the arch rib on the construction site is high, and the assembling quality is ensured.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for installing and constructing arch ribs of a tied arch bridge comprises the following steps: a. building a BIM three-dimensional model of an arch rib on a computer according to the design size of the tied arch bridge; b. a plurality of arch rib sections are processed by a factory in sections according to the design size of the tied arch bridge, and the arch rib sections are spliced together to form an arch rib; c. scanning and imaging the arch rib section and transmitting data to a computer, pre-assembling the scanned arch rib section in the computer to form a scanning model, comparing the scanning model with the BIM three-dimensional model, finding out a place which is not consistent with the BIM three-dimensional model, and finishing the non-consistent arch rib section until the scanning model is consistent with the BIM three-dimensional model; d. transporting all arch rib sections to a construction site for splicing, laying an arch rib splicing support at the position of the tied arch bridge before splicing, and laying a plurality of working platforms at the upper end of the arch rib splicing support; e. and hoisting the arch rib sections upwards, assembling the arch rib sections on the working platform, hoisting the next arch rib section for assembling after assembling one arch rib section, and sequentially assembling all the arch rib sections together to form the arch rib of the tied arch bridge.
When the tied arch bridge arch rib is installed, a plurality of sections of arch rib sections required by assembling the arch rib are processed in a factory, and the size of each arch rib section meets the design requirement of the arch rib. After the arch rib section is processed, scanning is firstly carried out, the scanned arch rib section is simulated and assembled on a computer, the pre-assembled scanning model is compared with a BIM three-dimensional model constructed on the computer, places which are not in accordance with the BIM three-dimensional model are found out, and the corresponding arch rib sections in the places are trimmed. The construction site of the arch rib section conveying belt which does not meet the design requirements is avoided, so that the arch rib section is found to be not meeting the requirements in the formal assembling process, and the normal construction progress is influenced. When the arch rib sections are assembled on the construction site, the crane lifts the arch rib sections upwards, the ends of the arch rib sections are butted together after the arch rib sections are lifted in place, and all the arch rib sections are sequentially assembled together to form the arch rib of the tied arch bridge. The assembling operation is carried out on the working platform, the assembling operation is convenient, and the assembling positioning accuracy is high. The arch ribs of the tied arch bridge are pre-assembled before being assembled on a construction site, so that the arch ribs conveyed to the construction site meet construction requirements, the construction progress is guaranteed, the assembling and positioning accuracy of the arch ribs on the construction site is high, and the assembling quality is guaranteed.
Preferably, the arch ribs are assembled from two ends to the middle in the step e. The arch ribs are assembled from two ends to the middle, and the two ends are assembled simultaneously, so that the construction period is shortened.
Preferably, the upper end of the arch rib assembling support is provided with an arch rib supporting die matched with the shape of the arch rib, the arch rib is lifted and then is loaded into the arch rib supporting die, and the arch rib is assembled after the position of the arch rib is adjusted in place. In the assembling process of the arch rib, the arch rib supporting die is beneficial to positioning of the arch rib section and is convenient for assembling operation of the arch rib section.
Preferably, the cross section of the arch rib supporting die is V-shaped, two pairs of detection positioning mechanisms are respectively arranged on the outer wall of the arch rib supporting die corresponding to each arch rib section, and the pressing mechanisms are respectively arranged at the bottoms of the arch rib supporting dies and the detection positioning mechanisms in a one-to-one correspondence manner; the detection positioning mechanism comprises a support, a telescopic column, a detection column and a positioning column, wherein the support is tightly installed on an arch rib supporting die, a piston cavity is arranged on the support, the rear end of the telescopic column is installed in the piston cavity in a matched mode, a reset spring is installed between the telescopic column and the piston cavity, an installation cavity and an oil cavity are arranged at the front end of the telescopic column, the rear ends of the detection column and the positioning column are respectively installed in the installation cavity and the oil cavity, a fastening spring is connected between the detection column and the installation cavity, a return spring is connected between the positioning column and the oil cavity, the front ends of the detection column and the positioning column extend out of the front end of the telescopic column, the detection column can move backwards and can move forwards, the rear end of the oil cavity is connected with an oil inlet pipe and an oil outlet pipe in parallel, an oil inlet electromagnetic valve is installed on the oil outlet pipe, the oil outlet electromagnetic valve, the lower end of the feeler lever is provided with a contact pin which is abutted against the outer wall of the detection column and is close to the rear end of the slot, an abutting spring is connected between the feeler lever and the telescopic column, the upper end of the feeler lever is provided with a pushing column, the feeler lever is provided with a touch block, an oil discharge spring switch and an oil inlet spring switch are respectively arranged above and below the touch block on the telescopic column, the touch block is abutted against the oil discharge spring switch, and the oil discharge spring switch and the oil inlet spring switch are respectively used for controlling the on-off of the oil discharge electromagnetic valve and the oil inlet; the rear end of the positioning column is provided with a sliding block, the rear part of the oil inlet cavity is provided with a positioning convex ring, an unlocking rod capable of sliding is arranged at the position of the positioning convex ring, one end of the unlocking rod extends out of the end part of the positioning convex ring, the other end of the unlocking rod extends out of the telescopic column, an unlocking part which is obliquely arranged is arranged at the position of the end part of the unlocking rod, and the unlocking rod moves outwards to enable the unlocking part to be abutted to the pushing column to drive; the pressing mechanism comprises a piston cylinder, a piston and a tensioning spring, the piston is installed in the piston cylinder in a matching mode, oil is filled in the piston cylinder, a pressing rod is connected to the piston, the pressing rod penetrates through the bottom of the arch rib supporting die in an upward moving mode, the tensioning spring is connected between the piston and the upper end of the piston cylinder, and the piston cylinder is communicated with a piston cavity in the support through a pipeline; the arch rib section is put down in the arch rib supporting die, the lower end of the arch rib section presses the pressure rod downwards, the piston moves downwards to push oil liquid into the piston cavity on the support so as to push the telescopic column outwards, when the arch rib section is at an accurate position, the end part of the detection column is just attached to the outer wall of the arch rib section, when the position of the arch rib section deviates, the detection column on one detection positioning mechanism in each pair of detection positioning mechanisms is pushed backwards, the slot slides through the contact pin, the contact pin moves downwards so as to enable the touch block to be abutted to the oil inlet spring switch, the oil inlet electromagnetic valve is opened, high-pressure oil liquid enters the oil cavity so as to push the positioning column outwards until the slide block is abutted to the positioning convex ring, at the moment, the positioning column just pushes the arch rib section to an accurate position, the unlocking rod is pushed outwards, the unlocking part pushes the pushing column upwards so as to enable the touch block to be abutted to the oil outlet spring switch, and the, the positioning column and the detection column return.
When the construction mode is used for assembling the arch rib sections, the arch rib sections can be ensured to be in accurate positions, deviation can not occur, accurate assembling is achieved, and the assembling efficiency and quality are improved.
Preferably, the outer wall of the telescopic column is provided with a rack, the support is hinged with a limiting rod, the limiting rod is arranged between the support and the arch rib supporting die, the upper end of the limiting rod is provided with a limiting head, the limiting head is arranged in a tooth groove on the rack, a pulling spring is arranged between the support and the upper part of the limiting rod, the support is provided with a butting column, and the upper part of the limiting rod is supported on the limiting column. The tooth's socket is slided to the spacing head of the outside gliding in-process of flexible post, and after the flexible post slided the position and stops outside sliding, spacing head butt to in the tooth's socket, prevents flexible post return, when the oil cavity pours into high-pressure fluid into this moment, avoids flexible post to remove, guarantees reliable stretching out of reference column.
Preferably, the detection column and the positioning column are provided with balls at the front ends thereof. The ball is attached to the side wall of the arch rib section, so that the arch rib section can move conveniently.
Preferably, a limiting block for limiting the piston is arranged in the piston cylinder and close to the upper part. The limiting block limits the piston, and the amount of oil injected into the piston cylinder is guaranteed to be accurate.
Compared with the prior art, the invention has the beneficial effects that: the arch ribs of the tied arch bridge are pre-assembled before being assembled on a construction site, so that the arch ribs conveyed to the construction site meet construction requirements, the construction progress is guaranteed, the assembling and positioning accuracy of the arch ribs on the construction site is high, and the assembling quality is guaranteed.
Drawings
FIG. 1 is a schematic structural view of the tied arch bridge of the present invention after construction;
FIG. 2 is a schematic structural view of the arch rib assembly process of the present invention;
FIG. 3 is a schematic view of the installation structure of the arch rib support mold of the present invention;
fig. 4 is a cross-sectional view of the arch rib support mold of the present invention;
FIG. 5 is an enlarged partial schematic view of FIG. 4 of the present invention;
in the figure: 1. a tied arch bridge, 2, an arch rib section, 3, an arch rib, 4, an arch rib splicing support, 5, a working platform, 6, an arch rib supporting die, 7, a detection positioning mechanism, 8, a pressing mechanism, 9, a support, 10, a telescopic column, 11, a detection column, 12, a positioning column, 13, a piston cavity, 14, a reset spring, 15, a mounting cavity, 16, an oil cavity, 17, a fastening spring, 18, a return spring, 19, an oil inlet pipe, 20, an oil outlet pipe, 21, an oil inlet electromagnetic valve, 22, an oil outlet electromagnetic valve, 23, a touch rod, 24, a slot, 25, a contact pin, 26, a butt spring, 27, a pushing column, 28, a touch block, 29, an oil outlet spring switch, 30, an oil inlet spring switch, 31, a sliding block, 32, a positioning convex ring, 33, an unlocking rod, 34, an unlocking part, 35, a piston cylinder, 36, a piston, 37, a tensioning spring, 38, a pressure rod, 39, a rack, 40 and a limiting rod, 41. limiting head, 42, pulling spring, 43, abutting column, 44, ball, 45 and limiting block.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example (b): a method for installing and constructing a rib of a tied arch bridge (see the attached figures 1 to 5) comprises the following steps: a. building a BIM three-dimensional model of an arch rib on a computer according to the design size of the tied arch bridge 1; b. a plurality of arch rib sections 2 are processed by a factory in sections according to the design size of the tied arch bridge, and the arch rib sections are spliced together to form an arch rib 3; c. scanning and imaging the arch rib section and transmitting data to a computer, wherein the scanning model is formed by pre-assembling the scanned arch rib section in the computer by adopting an infrared laser scanning and imaging technology, the scanning model is compared with the BIM three-dimensional model, a place which is not consistent with the BIM three-dimensional model is found out, and the inconsistent arch rib section is trimmed until the scanning model is consistent with the BIM three-dimensional model; d. transporting all arch rib sections to a construction site for splicing, laying an arch rib splicing support 4 at the position of the tied arch bridge before splicing, and laying a plurality of working platforms 5 at the upper end of the arch rib splicing support; e. and hoisting the arch rib sections upwards, assembling the arch rib sections on the working platform, hoisting the next arch rib section for assembling after assembling one arch rib section, and sequentially assembling all the arch rib sections together to form the arch rib of the tied arch bridge.
And e, splicing the arch ribs from two ends to the middle when splicing the arch ribs in the step e. And synchronously hoisting arch rib sections at two ends of the tied arch bridge, and assembling from the two ends to the middle section. Constructors stand on the working platform to adjust and assemble the arch rib sections. The upper end of the arch rib assembling support is provided with an arch rib supporting die 6 matched with the shape of the arch rib, the arch rib supporting die is of an arc structure, the arch rib is lifted and then is loaded into the arch rib supporting die, and the arch rib is assembled after the position of the arch rib is adjusted in place.
The cross section of the arch rib supporting die is V-shaped, two pairs of detection positioning mechanisms 7 are respectively arranged on the outer wall of the arch rib supporting die corresponding to each arch rib section, each pair of detection positioning mechanisms are oppositely arranged on the two opposite outer walls of the arch rib supporting die, and the bottom of the arch rib supporting die and the detection positioning mechanisms are correspondingly provided with pressing mechanisms 8 one by one; the detection positioning mechanism comprises a support 9, a telescopic column 10, a detection column 11 and a positioning column 12, the support is tightly fixed on an arch rib supporting mould, a piston cavity 13 is arranged on the support, the rear end of the telescopic column is fittingly arranged in the piston cavity, a reset spring 14 is arranged between the telescopic column and the piston cavity, a mounting cavity 15 and an oil cavity 16 are arranged at the front end of the telescopic column, the rear ends of the detection column and the positioning column are respectively arranged in the mounting cavity and the oil cavity, a fastening spring 17 is connected between the detection column and the mounting cavity, a return spring 18 is connected between the positioning column and the oil cavity, the front ends of the detection column and the positioning column extend out of the front end of the telescopic column, the detection column can move backwards, the positioning column can move forwards, the rear end of the oil cavity is connected with an oil inlet pipe 19 and an oil outlet pipe 20 in parallel, an oil inlet electromagnetic valve 21 is arranged on the oil outlet pipe, an oil outlet electromagnetic valve 22 is arranged on, the outer wall of the detection column is provided with a slot 24, the lower end of the feeler lever is provided with a contact pin 25, the contact pin is abutted against the outer wall of the detection column and is close to the rear end of the slot, an abutting spring 26 is connected between the feeler lever and the telescopic column, the upper end of the feeler lever is provided with a pushing column 27, the feeler lever is provided with a touch block 28, an oil discharge spring switch 29 and an oil inlet spring switch 30 are respectively arranged above and below the touch block on the telescopic column, the touch block is abutted against the oil discharge spring switch, and the oil discharge spring switch and the oil inlet spring switch are respectively used for controlling the on-off; the rear end of the positioning column is provided with a sliding block 31, the rear part of the oil inlet cavity is provided with a positioning convex ring 32, the positioning convex ring is provided with a slidable unlocking rod 33, one end of the unlocking rod extends out of the end part of the positioning convex ring, the other end of the unlocking rod extends out of the telescopic column, the end part of the unlocking rod is provided with an unlocking part 34 which is obliquely arranged, a spring is connected between the unlocking rod and the telescopic column, and the unlocking rod moves outwards to enable the unlocking part to abut against the pushing column to drive the contact rod to; the pressing mechanism comprises a piston cylinder 35, a piston 36 and a tension spring 37, the piston is installed in the piston cylinder in a matching mode, oil is filled in the piston cylinder, a pressure rod 38 is connected to the piston, the pressure rod penetrates through the bottom of the arch rib supporting die in an upward moving mode, the tension spring is connected between the piston and the upper end of the piston cylinder, and the piston cylinder is communicated with a piston cavity in the support through a pipeline; the arch rib section is put down in the arch rib supporting die, the lower end of the arch rib section presses the pressure rod downwards, the piston moves downwards to push oil liquid into the piston cavity on the support so as to push the telescopic column outwards, when the arch rib section is at an accurate position, the end part of the detection column is just attached to the outer wall of the arch rib section, when the position of the arch rib section deviates, the detection column on one detection positioning mechanism in each pair of detection positioning mechanisms is pushed backwards, the slot slides through the contact pin, the contact pin moves downwards so as to enable the touch block to be abutted to the oil inlet spring switch, the oil inlet electromagnetic valve is opened, high-pressure oil liquid enters the oil cavity so as to push the positioning column outwards until the slide block is abutted to the positioning convex ring, at the moment, the positioning column just pushes the arch rib section to an accurate position, the unlocking rod is pushed outwards, the unlocking part pushes the pushing column upwards so as to enable the touch block to be abutted to the oil outlet spring switch, and the, the positioning column and the detection column return. The outer wall of the telescopic column is provided with a rack 39, the support is hinged with a limiting rod 40, the limiting rod is arranged between the support and the arch rib supporting die, the upper end of the limiting rod is provided with a limiting head 41, the limiting head is arranged in a tooth groove on the rack, a pulling spring 42 is arranged between the support and the upper part of the limiting rod, the support is provided with a butting column 43, and the upper part of the limiting rod is supported on the limiting column. The front ends of the detection column and the positioning column are provided with balls 44. A limiting block 45 for limiting the piston is arranged in the piston cylinder and close to the upper part.
When the tied arch bridge arch rib is installed, a plurality of sections of arch rib sections required by assembling the arch rib are processed in a factory, and the size of each arch rib section meets the design requirement of the arch rib. After the arch rib section is processed, scanning is firstly carried out, the scanned arch rib section is simulated and assembled on a computer, the pre-assembled scanning model is compared with a BIM three-dimensional model constructed on the computer, places which are not in accordance with the BIM three-dimensional model are found out, and the corresponding arch rib sections in the places are trimmed. The construction site of the arch rib section conveying belt which does not meet the design requirements is avoided, so that the arch rib section is found to be not meeting the requirements in the formal assembling process, and the normal construction progress is influenced. When the arch rib sections are assembled on the construction site, the crane lifts the arch rib sections upwards, the ends of the arch rib sections are butted together after the arch rib sections are lifted in place, and all the arch rib sections are sequentially assembled together to form the arch rib of the tied arch bridge. The assembling operation is carried out on the working platform, the assembling operation is convenient, and the assembling positioning accuracy is high.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (7)
1. A method for installing and constructing arch ribs of a tied arch bridge is characterized by comprising the following steps: a. building a BIM three-dimensional model of an arch rib on a computer according to the design size of the tied arch bridge; b. a plurality of arch rib sections are processed by a factory in sections according to the design size of the tied arch bridge, and the arch rib sections are spliced together to form an arch rib; c. scanning and imaging the arch rib section and transmitting data to a computer, pre-assembling the scanned arch rib section in the computer to form a scanning model, comparing the scanning model with the BIM three-dimensional model, finding out a place which is not consistent with the BIM three-dimensional model, and finishing the non-consistent arch rib section until the scanning model is consistent with the BIM three-dimensional model; d. transporting all arch rib sections to a construction site for splicing, laying an arch rib splicing support at the position of the tied arch bridge before splicing, and laying a plurality of working platforms at the upper end of the arch rib splicing support; e. and hoisting the arch rib sections upwards, assembling the arch rib sections on the working platform, hoisting the next arch rib section for assembling after assembling one arch rib section, and sequentially assembling all the arch rib sections together to form the arch rib of the tied arch bridge.
2. A tied arch bridge arch rib installation and construction method according to claim 1, wherein the arch rib is assembled from both ends to the middle in the step e.
3. The tied arch bridge arch rib installation and construction method as claimed in claim 1, wherein an arch rib supporting mold adapted to the shape of the arch rib is installed at the upper end of the arch rib assembling support, the arch rib is lifted and then placed in the arch rib supporting mold, and the tied arch bridge arch rib is assembled after the position of the arch rib is adjusted in place.
4. The tied arch bridge arch rib installation and construction method as claimed in claim 3, wherein the cross-section of the arch rib supporting mold is V-shaped, two pairs of detection and positioning mechanisms are respectively installed on the outer wall of the arch rib supporting mold corresponding to each arch rib section, and the pressing mechanisms are installed on the bottoms of the arch rib supporting molds and the detection and positioning mechanisms in one-to-one correspondence; the detection positioning mechanism comprises a support, a telescopic column, a detection column and a positioning column, wherein the support is tightly installed on an arch rib supporting die, a piston cavity is arranged on the support, the rear end of the telescopic column is installed in the piston cavity in a matched mode, a reset spring is installed between the telescopic column and the piston cavity, an installation cavity and an oil cavity are arranged at the front end of the telescopic column, the rear ends of the detection column and the positioning column are respectively installed in the installation cavity and the oil cavity, a fastening spring is connected between the detection column and the installation cavity, a return spring is connected between the positioning column and the oil cavity, the front ends of the detection column and the positioning column extend out of the front end of the telescopic column, the detection column can move backwards and can move forwards, the rear end of the oil cavity is connected with an oil inlet pipe and an oil outlet pipe in parallel, an oil inlet electromagnetic valve is installed on the oil outlet pipe, the oil outlet electromagnetic valve, the lower end of the feeler lever is provided with a contact pin which is abutted against the outer wall of the detection column and is close to the rear end of the slot, an abutting spring is connected between the feeler lever and the telescopic column, the upper end of the feeler lever is provided with a pushing column, the feeler lever is provided with a touch block, an oil discharge spring switch and an oil inlet spring switch are respectively arranged above and below the touch block on the telescopic column, the touch block is abutted against the oil discharge spring switch, and the oil discharge spring switch and the oil inlet spring switch are respectively used for controlling the on-off of the oil discharge electromagnetic valve and the oil inlet; the rear end of the positioning column is provided with a sliding block, the rear part of the oil inlet cavity is provided with a positioning convex ring, an unlocking rod capable of sliding is arranged at the position of the positioning convex ring, one end of the unlocking rod extends out of the end part of the positioning convex ring, the other end of the unlocking rod extends out of the telescopic column, an unlocking part which is obliquely arranged is arranged at the position of the end part of the unlocking rod, and the unlocking rod moves outwards to enable the unlocking part to be abutted to the pushing column to drive; the pressing mechanism comprises a piston cylinder, a piston and a tensioning spring, the piston is installed in the piston cylinder in a matching mode, oil is filled in the piston cylinder, a pressing rod is connected to the piston, the pressing rod penetrates through the bottom of the arch rib supporting die in an upward moving mode, the tensioning spring is connected between the piston and the upper end of the piston cylinder, and the piston cylinder is communicated with a piston cavity in the support through a pipeline; the arch rib section is put down in the arch rib supporting die, the lower end of the arch rib section presses the pressure rod downwards, the piston moves downwards to push oil liquid into the piston cavity on the support so as to push the telescopic column outwards, when the arch rib section is at an accurate position, the end part of the detection column is just attached to the outer wall of the arch rib section, when the position of the arch rib section deviates, the detection column on one detection positioning mechanism in each pair of detection positioning mechanisms is pushed backwards, the slot slides through the contact pin, the contact pin moves downwards so as to enable the touch block to be abutted to the oil inlet spring switch, the oil inlet electromagnetic valve is opened, high-pressure oil liquid enters the oil cavity so as to push the positioning column outwards until the slide block is abutted to the positioning convex ring, at the moment, the positioning column just pushes the arch rib section to an accurate position, the unlocking rod is pushed outwards, the unlocking part pushes the pushing column upwards so as to enable the touch block to be abutted to the oil outlet spring switch, and the, the positioning column and the detection column return.
5. The tied arch bridge arch rib installation and construction method as claimed in claim 4, wherein the outer wall of the telescopic post is provided with a rack, the support is hinged with a limiting rod, the limiting rod is arranged between the support and the arch rib supporting mold, the upper end of the limiting rod is provided with a limiting head, the limiting head is arranged in a tooth groove on the rack, a pulling spring is arranged between the support and the upper part of the limiting rod, the support is provided with a butting post, and the upper part of the limiting rod is supported on the limiting post.
6. The tied arch bridge arch rib installation and construction method according to claim 4, wherein balls are installed at the front ends of the detection column and the positioning column.
7. The tied arch bridge arch rib installation and construction method according to claim 4, 5 or 6, wherein a limiting block for limiting the piston is provided in the piston cylinder at a position near the upper portion.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647420A (en) * | 2020-12-21 | 2021-04-13 | 朱荣超 | Supporting equipment for building garden arched bridge |
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