CN114703755A - System and method for intercommunicating temporary channels at cantilever ends of continuous beam bridge - Google Patents
System and method for intercommunicating temporary channels at cantilever ends of continuous beam bridge Download PDFInfo
- Publication number
- CN114703755A CN114703755A CN202210366808.6A CN202210366808A CN114703755A CN 114703755 A CN114703755 A CN 114703755A CN 202210366808 A CN202210366808 A CN 202210366808A CN 114703755 A CN114703755 A CN 114703755A
- Authority
- CN
- China
- Prior art keywords
- longitudinal beam
- moving mechanism
- door
- cantilever
- sliding door
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 230000006698 induction Effects 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 238000012790 confirmation Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000001939 inductive effect Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000037361 pathway Effects 0.000 claims 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a system and a method for intercommunicating temporary channels at cantilever ends of a continuous beam bridge. The temporary passage system comprises a first longitudinal beam, a second longitudinal beam, an adjusting device, a telescopic adjusting beam plate, a passage beam plate, a guardrail structure, a first safe sliding door, a first moving mechanism, a second safe sliding door and a second moving mechanism. The temporary passage system adjusts the distance or the lap joint length between the first longitudinal beam and the second longitudinal beam through the adjusting device, so that the length of the temporary passage system is matched with the distance between the first cantilever end and the second cantilever end, the first safe sliding door and the second safe sliding door are controlled to be opened and closed respectively by controlling the first moving mechanism and the second moving mechanism, and accordingly, control personnel pass through the temporary passage system and are convenient for personnel to pass through the telescopic adjusting beam plate, the passage beam plate and the guardrail structure. The temporary channel system realizes safe passing between the cantilever ends at the midspan positions of two adjacent piers, reduces safety risks, ensures stable operation of projects, and achieves the effect of bridge safety control.
Description
Technical Field
The invention relates to a temporary channel system and a temporary channel method for intercommunication of cantilever ends of a continuous beam bridge, and belongs to the technical field of safety control in bridge construction.
Background
Due to the unloading function of the pivot negative bending moment, the maximum mid-span positive bending moment of the continuous beam bridge is obviously reduced, the joints are few, the traveling is smooth, and the high-speed passing of vehicles is facilitated, so that the continuous beam bridge is often adopted for the bridge with larger span. The cantilever construction method is a classical construction method of a continuous beam bridge, and is a construction method which is symmetrical by taking a pier as a center and is lengthened by sections of cantilevers. A temporary channel is often required to be arranged between the cantilever ends of the two piers in the later construction stage of the continuous beam bridge so as to facilitate the communication of personnel between the two piers.
In traditional construction, interim intercommunication is set up simple and easy interim access through the manual work and is realized, and simple and easy interim access comprises simple steel pipe, steel sheet or plank, carries out interim fixed through the fastener between the steel pipe, and steel sheet or plank are pieced together and are adorned on the steel pipe of bottom. The bearing capacity of the simple temporary access is limited by the quality and the abrasion degree of the steel pipes and the steel plates and the manual setting operation standard, the safety performance cannot be guaranteed, the safety risk is high, and the risk that people or objects fall from a high place is easily caused. Therefore, in the construction of the continuous beam bridge, a temporary intercommunication channel with higher safety and convenient control needs to be developed.
Disclosure of Invention
Aiming at the problem of high safety risk of a simple temporary access at cantilever ends of two piers in the existing continuous beam bridge construction, the invention provides a system and a method for communicating temporary channels at the cantilever ends of a continuous beam bridge, which greatly reduce the safety risk in construction.
In order to solve the technical problems, the invention comprises the following technical scheme:
a temporary channel system for intercommunication of cantilever ends of continuous beam bridges is used for intercommunication between a cantilever end I and a cantilever end II of two adjacent piers, and comprises a longitudinal beam I, a longitudinal beam II, an adjusting device, a telescopic adjusting beam plate, a channel beam plate, a guardrail structure, a safety sliding door I, a moving mechanism I, a safety sliding door II and a moving mechanism II;
one end of the first longitudinal beam is fixed with the first cantilever end, the other end of the first longitudinal beam is spliced with one end of the second longitudinal beam through an adjusting device, and the other end of the second longitudinal beam is supported on the second cantilever end; the adjusting device is used for adjusting the distance or the lap joint length between the first longitudinal beam and the second longitudinal beam;
the telescopic adjusting beam plate is laid in the adjusting range of the adjusting device; the channel beam plate is laid on the first longitudinal beam and the second longitudinal beam;
the first safety sliding door is arranged at one end of the first longitudinal beam, which is close to the first cantilever end, and the first moving mechanism is used for opening and closing the first safety sliding door; the second safety sliding door is arranged at one end, close to the second cantilever end, of the second longitudinal beam, and the second moving mechanism is used for opening and closing the second safety sliding door;
the guardrail structure is arranged on the first longitudinal beam and the second longitudinal beam.
Furthermore, the adjusting device comprises a roller, a first wireless motor actuator, a turntable, a hollow screw, an internal thread loop bar and a fixed connecting rod;
a fixed connecting rod is arranged at the end part of the first longitudinal beam;
the first wireless motor actuator is hollow and is embedded and sleeved on the fixed connecting rod and is fixedly connected with one end part of the longitudinal beam;
the turntable is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the first wireless motor actuator;
the hollow screw is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the rotary table, and the outer wall of the hollow screw is provided with an external thread;
an internal thread loop bar is arranged at the end part of the longitudinal beam II, is of a hollow design and comprises a threaded connecting part and a sliding part; the inner wall of the threaded connecting part is provided with an internal thread, and the internal thread is matched with the external thread of the hollow screw rod; the inner side of the sliding part is provided with a roller, the hollow part of the sliding part is matched with one end part of the longitudinal beam in size, and the roller is supported on the first longitudinal beam.
Furthermore, two sides of the first safe sliding door and two sides of the second safe sliding door are respectively provided with an induction chip, and the induction chips are used for inducing pedestrians.
Further, the temporary channel system further comprises a controller; the controller is used for acquiring the induction information of the induction chip and sending door opening or closing instructions to the first moving mechanism and the second moving mechanism according to the acquired information.
Further, the first moving mechanism comprises a second wireless motor actuator, a telescopic pull rod and an iron buckle;
the second wireless motor actuator is arranged on the first longitudinal beam and used for receiving the instruction and driving the telescopic pull rod to stretch, and the first safe sliding door is driven to open and close through the telescopic pull rod;
one side of the iron buckle is fixedly connected with the bottom of the safety door, the other side of the iron buckle is connected with one side of the telescopic pull rod, and the other side of the telescopic pull rod is connected with the second wireless motor actuator.
Furthermore, rails are arranged on the cantilever end I and the cantilever end II along the width direction, a cross beam is arranged at the end parts of the longitudinal beam I and the longitudinal beam II, a sliding clamping bolt is arranged at the bottom of the cross beam and matched with the rails, and the sliding clamping bolt is arranged in the rails and can slide along the rails and brake, so that the transverse position of the temporary channel system is controlled.
Correspondingly, the invention also provides a continuous beam bridge cantilever end intercommunication method, which comprises the following steps:
step one, assembling a temporary channel system communicated with the cantilever end of the continuous beam bridge according to claim 1 at the cantilever end I, and adjusting the distance between the first longitudinal beam and the second longitudinal beam through an adjusting device to enable the length of the temporary channel system to be matched with the distance between the first cantilever end and the second cantilever end; and hoisting the temporary channel system in place, fixing one end of the first longitudinal beam on the first cantilever end, and fixing one end of the second longitudinal beam on the second cantilever end.
And step two, controlling the first safe sliding door and the second safe sliding door through the first moving mechanism and the second moving mechanism to complete personnel passing.
Further, the temporary channel system further comprises a distance measurement collector, and the distance measurement collector is used for collecting the length of the temporary channel system;
in the first step, the distance between the first longitudinal beam and the second longitudinal beam is adjusted through an adjusting device, and the method specifically comprises the following steps:
step 1-1. measuring the length D of the temporary channel system by the distance measuring and collecting instrument1Manually measuring the distance D between the first cantilever end and the second cantilever end2；
Step 1-2, adjusting through an adjusting deviceDistance between the first and second longitudinal beams D1And D2And (4) matching.
Furthermore, the adjusting device comprises a roller, a first wireless motor actuator, a turntable, a hollow screw, an internal thread loop bar and a fixed connecting rod; a fixed connecting rod is arranged at the end part of the first longitudinal beam; the first wireless motor actuator is hollow and is embedded and sleeved on the fixed connecting rod and is fixedly connected with one end part of the longitudinal beam; the turntable is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the first wireless motor actuator; the hollow screw is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the rotary table, and the outer wall of the hollow screw is provided with an external thread; an internal thread loop bar is arranged at the end part of the longitudinal beam II, is of a hollow design and comprises a thread connecting part and a sliding part; the inner wall of the threaded connecting part is provided with an internal thread, and the internal thread is matched with the external thread of the hollow screw rod; the inner side of the sliding part is provided with a roller, the size of the hollow part of the sliding part is matched with that of one end part of the longitudinal beam, and the roller is supported on the first longitudinal beam;
in the step 1-2, the distance between the first longitudinal beam and the second longitudinal beam is adjusted through an adjusting device, so that D1And D2The matching specifically comprises the following steps:
if the manual measurement result is greater than the measurement result of the distance measurement acquisition instrument, the controller sends an anticlockwise rotation instruction to the first wireless motor actuator, and the first wireless motor actuator executes the anticlockwise rotation instruction to drive the rotary disc and the hollow screw to rotate anticlockwise; because the internal thread loop bar and the two end parts of the longitudinal beam are fixed, the corresponding hollow screw rod is slowly pushed out, so that the longitudinal beam is driven to be pushed out backwards, meanwhile, the telescopic adjusting beam plate is driven to be stretched adaptively, and the corresponding guardrail structure is also stretched adaptively until the monitoring result of the distance measuring acquisition instrument is matched with the manual measurement result;
if the manual measurement result is smaller than the measurement result of the distance measurement acquisition instrument, the controller sends a clockwise rotation instruction to the first wireless motor actuator, and the first wireless motor actuator executes the clockwise rotation instruction to drive the turntable and the hollow screw to rotate clockwise; because the internal thread loop bar is fixed with longeron both ends portion, then corresponding cavity screw rod slowly precession to drive longeron and be close to longitudinal two earlier on, drive flexible regulation roof beam board adaptability simultaneously and contract, corresponding flexible regulation guardrail adaptability also contracts, until range finding collection appearance monitoring result and artifical measuring result phase-match.
Furthermore, two sides of the first safety sliding door and two sides of the second safety sliding door are respectively provided with a sensing chip, the sensing chips from the first cantilever end to the second cantilever end are marked as a, b, c and d in sequence, and the sensing chips are used for sensing whether a person passes through the sensing chips;
in the second step, the first moving mechanism controls the first safe moving door and the second moving mechanism controls the second safe moving door to complete personnel passing, and the method specifically comprises the following steps:
step 2-1, when the sensing chip a senses that the personnel need to pass, sending pass request information to the controller;
step 2-2, after the controller receives the information, judging whether a person stays in the channel; if yes, the controller sends a closing maintaining instruction to the first moving mechanism; if not, the controller sends a door opening instruction to the first moving mechanism, and after the first moving mechanism receives the door opening instruction, the door opening operation is executed, and the first safe moving door is opened;
2-3, after the safety sliding door is opened, a person enters the channel, the sensing chip b senses that the person passes through the channel, and the sensing chip b sends a passing confirmation message to the controller; the controller issues a door closing instruction to the first moving mechanism, and the first moving mechanism executes door closing operation after receiving the door closing instruction, and closes the first safe moving door;
2-4, the sensing chip c senses that the person passes through and sends a passing confirmation message to the controller; the controller sends a door opening instruction to the second moving mechanism, and the second moving mechanism executes door opening operation after receiving the door opening instruction, so that the second safe moving door is opened;
step 2-5, after the second safety sliding door is opened, the personnel leave the passage, the sensing chip d senses that the personnel pass through the passage and sends a passing confirmation message to the controller; and the controller issues a door closing instruction to the second moving mechanism, and the second moving mechanism executes door closing operation after receiving the door closing instruction, so that the second safe moving door is closed.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
the temporary passage system adjusts the distance or the lap joint length between the first longitudinal beam and the second longitudinal beam through the adjusting device, so that the length of the temporary passage system is matched with the distance between the first cantilever end and the second cantilever end, the first safe sliding door and the second safe sliding door are controlled to be opened and closed respectively by controlling the first moving mechanism and the second moving mechanism, and accordingly, control personnel pass through the temporary passage system and are convenient for personnel to pass through the telescopic adjusting beam plate, the passage beam plate and the guardrail structure. The temporary channel system realizes safe passing between the cantilever ends at the midspan positions of two adjacent piers, reduces safety risks, ensures stable operation of projects, and achieves the effect of bridge safety control. In addition, the temporary passage system induces the passerby through the induction chips arranged on the two sides of the first safe sliding door and the two sides of the second safe sliding door, acquires induction information of the induction chips through the controller, and sends door opening or closing instructions to the first moving mechanism and the second moving mechanism according to the acquired information, so that intelligent control of passing of the passerby is realized, and safety is improved. Through being provided with the track and the draw bolt that slides, make the transverse position of interim passageway system adjust as required, can avoid interim passageway system to obstruct cantilever end further construction, can also select suitable hookup location, make the intercommunication more convenient, high-efficient.
According to the method for communicating the cantilever ends of the continuous girder bridge, the first safe sliding door can be controlled by the first moving mechanism, and the second safe sliding door can be controlled by the second moving mechanism to finish personnel passing. The length D of the temporary channel system is acquired by arranging a distance measurement acquisition instrument1Manually measuring the distance D between the first cantilever end and the second cantilever end2Adjusting the distance between the first longitudinal beam and the second longitudinal beam through an adjusting device to enable D1And D2And (4) matching. And whether personnel pass through is responded to through sensing chip a, b, c, d, and the opening or closing of safe sliding door one, safe sliding door two is controlled through the controller, realizes the intelligent control that personnel passed through, improves the security that personnel passed through.
Drawings
FIG. 1 is a schematic plan view of a temporary channel system for interconnecting the cantilever ends of a continuous beam bridge according to the present invention;
FIG. 2 is an elevational view of a continuous beam bridge cantilevered end intercommunicating temporary channel system of the present invention;
FIG. 3 is a schematic plan view of an adjustment device of the present invention;
FIG. 4 is an elevational view of the adjustment device of the present invention;
fig. 5 is a schematic view of a first safety door and a first moving mechanism in the present invention.
The numbers in the figures are as follows:
10-cantilever end one; 11-cantilever end two; 12-a track; 13-a range finder;
20-a first longitudinal beam; 21-longitudinal beam two; 22-a cross beam; 23-sliding clamping bolts;
30-a regulating device; 31-a roller; 32-first wireless motor actuator; 33-a turntable; 34-a hollow screw; 35-internal thread loop bar; 36-a fixed connecting rod;
40-expansion adjusting beam plates; 41-channel beam slab;
50-a guardrail structure; 51-guardrail upright stanchion; 52-telescopic adjusting guardrail;
60-safe sliding door I; 61-a first moving mechanism; 62-a second safety sliding door; 63-a second moving mechanism; 64-wireless motor actuator two; 65-telescopic pull rod; 66-iron button;
70-a controller; 71-a sensing chip; 72-voice broadcast speaker.
Detailed Description
The present invention provides a system and method for temporary communication between cantilever ends of a continuous bridge, which is described in detail below with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent in conjunction with the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example one
As shown in fig. 1 to 5, the temporary channel system for the interconnection of the cantilever ends of the continuous girder bridges provided by the embodiment is used for the interconnection between the cantilever end i 10 and the cantilever end ii 11 of two adjacent piers, and comprises a longitudinal girder i 20, a longitudinal girder ii 21, an adjusting device 30, a telescopic adjusting girder plate 40, a channel girder plate 41, a guardrail structure 50, a first safety sliding door 60, a first moving mechanism 61, a second safety sliding door 62 and a second moving mechanism 63.
One end of the first longitudinal beam 20 is fixed with the first cantilever end 10, the other end of the first longitudinal beam is spliced with one end of the second longitudinal beam 21 through an adjusting device 30, and the other end of the second longitudinal beam 21 is supported on the second cantilever end 11; the adjusting device 30 is used for adjusting the distance or the overlapping length of the first longitudinal beam 20 and the second longitudinal beam 21. The adjusting device 30 is installed at the splicing position of the first longitudinal beam 20 and the second longitudinal beam 21, and two sides of the adjusting device 30 are respectively butted with one end of the first longitudinal beam 20 and one end of the second longitudinal beam 21. The coverage area of the adjusting device 30 is an adjusting interval. The telescopic adjusting beam plate 40 is laid in the adjusting interval of the adjusting device 30, the telescopic adjusting beam plate 40 has a telescopic adjusting function, and the telescopic adjusting beam plate 40 is driven to adjust according to the telescopic adjustment of the adjusting device 30. The channel beam plates 41 are laid on the first longitudinal beam 20 and the second longitudinal beam 21 in the non-adjustment area, the telescopic adjusting beam plates 40 and the channel beam plates 41 are temporary channel passing pedals, and the end parts of the telescopic adjusting beam plates 40 are spliced with the channel beam plates 41 to form a channel for people to pass through.
The first safety sliding door 60 is arranged at one end, close to the first cantilever end 10, of the first longitudinal beam 20, and the first moving mechanism 61 is used for opening and closing the first safety sliding door 60; the second safety sliding door 62 is arranged at one end of the second longitudinal beam 21 close to the second cantilever end 11, and the second moving mechanism 63 is used for opening and closing the second safety sliding door 62.
The guardrail structure 50 is disposed on the first longitudinal beam 20 and the second longitudinal beam 21. By way of example, the guardrail structure 50 comprises guardrail uprights 51 and guardrail rails 52, the guardrail uprights 51 having a fixing function for fixing the guardrail rails 52. Of course the guardrail cross-bar 52 could be replaced by a guardrail suspension cable. It should be noted that, in the adjusting range of the adjusting device 30, the guardrail cross rod 52 may adopt a telescopic structure, so that the guardrail cross rod has a telescopic adjusting function, the adjusting device 30 drives the guardrail cross rod to perform self-adaptive adjustment of length, for example, the guardrail cross rod adopts a telescopic connection of a sleeve pipe, or the guardrail cross rod is provided with a connecting slide bar, the connecting slide bar is provided with a connecting end, the cross section of another guardrail cross rod adopts a C-shaped structure, the connecting end is inserted into a notch of the C-shaped structure, and the overlapping length between the two guardrail cross rods is adjusted by sliding the connecting slide bar.
The temporary channel system for the intercommunication of the cantilever ends of the continuous girder bridge provided by the embodiment adjusts the distance or the lap joint length between the first longitudinal beam 20 and the second longitudinal beam 21 through the adjusting device 30, so that the length of the temporary channel system is matched with the distance between the first cantilever end 10 and the second cantilever end 11, the first safe moving door 60 and the second safe moving door 62 are respectively controlled to open and close by controlling the first moving mechanism 61 and the second moving mechanism 63, so that the control personnel pass through, and the temporary channel system is convenient for the personnel to pass through by arranging the telescopic adjusting beam plate 40, the channel beam plate 41 and the guardrail structure 50. The temporary channel system realizes safe passing between the cantilever ends at the midspan positions of two adjacent piers, reduces safety risks, ensures stable operation of projects, and achieves the effect of bridge safety control.
Further, as shown in fig. 3 and 4, the adjusting device 30 includes a roller 31, a first wireless motor actuator 32, a rotary table 33, a hollow screw 34, an internal thread loop bar 35, and a fixed connecting bar 36. The end part of the first longitudinal beam 20 is provided with a fixed connecting rod 36, the first wireless motor actuator 32 is hollow and is embedded and sleeved on the fixed connecting rod 36 and fixedly connected with the end part of the first longitudinal beam 20, and the first wireless motor actuator 32 has a remote signal receiving function and performs an operation function. The turntable 33 is also hollow, is inserted and sleeved on the fixed connecting rod 36, and is fixedly connected with the first wireless motor actuator 32. The hollow screw 34 is hollow, is embedded and sleeved on the fixed connecting rod 36, and is fixedly connected with the rotary table 33, and an external thread is arranged on the outer wall of the hollow screw 34. An internal thread loop bar 35 is arranged at the end part of the longitudinal beam II 21, and the internal thread loop bar 35 is in a gradually-changed hollow design and comprises a thread connecting part and a sliding part; the inner wall of the threaded connecting part is provided with an internal thread, and the internal thread is matched with the external thread of the hollow screw 34; the inner side of the sliding part is provided with a roller 31, the hollow part of the sliding part corresponds to the end part of the first longitudinal beam 20 in size, and the roller 31 is supported on the first longitudinal beam 20. The roller 31 can be used for reducing the friction between the first longitudinal beam 20 and the internally threaded loop bar 35. The working principle of the adjusting device 30 is as follows: the first wireless motor actuator 32 receives the rotation instruction and rotates; the first wireless motor actuator 32 rotates to drive the rotary table 33 to rotate, the rotary table 33 and the hollow screw 34 are integrated, and the rotary table 33 rotates to drive the hollow screw 34 to rotate correspondingly; the hollow screw 34 is matched with the internal thread loop bar 35 and has the functions of screwing threads and stretching, and the hollow screw 34 rotates to adjust the threaded sleeve length between the hollow screw 34 and the internal thread loop bar 35, so that the stretching adjustment effect is achieved; the second longitudinal beam 21 moves along with the internal thread loop bar 35, so that the distance between the first longitudinal beam 20 and the second longitudinal beam 21 is adjusted. It should be noted that, the embodiment of fig. 3 and 4 is a butt-joint type splicing design of the first longitudinal beam 20 and the second longitudinal beam 21, and the distance between the first longitudinal beam 20 and the second longitudinal beam 21 is adjusted by the adjusting device 30, so that the lap-joint type splicing design is easily obtained, that is, the length of the overlapping portion of the first longitudinal beam 20 and the second longitudinal beam 21 is adjusted by the adjusting device 30, and the two structures are similar and will not be described again.
Further, the first cantilever end 10 and the second cantilever end 11 are provided with a track 12 along the width direction, for example, the track 12 is fixedly installed at a position within 1m of the cantilever end; the end parts of the first longitudinal beam 20 and the second longitudinal beam 21 are provided with a cross beam 22, the bottom of the cross beam 22 is provided with a sliding clamping bolt 23, the sliding clamping bolt 23 is matched with the track 12, and the sliding clamping bolt 23 is arranged in the track 12 and can slide along the track 12 and brake, so that the transverse position of the temporary channel system is controlled. Because the cantilever end of pier need carry out the festival construction one by one, in the work progress, interim channel system can cause the hindrance to the construction, through setting up track 12 and the gim peg 23 that slides, makes interim channel system can adjust the position on cantilever end one 10, cantilever end two 11, can avoid interim channel system to hinder the further construction of cantilever end, can also select suitable hookup location, makes the intercommunication more convenient, high-efficient.
Further, the first moving mechanism 61 of the first safe moving door 60 comprises a second wireless motor actuator 64, a telescopic pull rod 65 and an iron buckle 66, wherein the second wireless motor actuator 64 is installed on the first longitudinal beam 20 and used for receiving instructions and driving the telescopic pull rod 65 to stretch and retract, and the first safe moving door 60 is driven to be opened and closed through the telescopic pull rod 65. One side of the iron buckle 66 is fixedly connected with the bottom of the safety door, the other side of the iron buckle is connected with one side of the telescopic pull rod 65, and the other side of the telescopic pull rod 65 is connected with the second wireless motor actuator 64. It should be noted that the structure and the operation principle of the second moving mechanism 63 of the second safety sliding door 62 are the same as those of the first moving mechanism 61, and are not described herein again.
Furthermore, two induction chips 71 are respectively arranged on two sides of the first safety sliding door 60 and two sides of the second safety sliding door 62, and the induction chips 71 are used for inducing pedestrians. As an example, the sensing chips 71 are longitudinally and symmetrically arranged on the longitudinal beam, one sensing chip 71 is arranged on each of two sides of the first safety sliding door 60 and two sides 1m of the second safety sliding door 62, and the sensing chips 71 are numbered from one side, for example, the sensing chips 71 are numbered as a, b, c and d sequentially.
Further, the temporary channel system further comprises a distance measurement acquisition instrument 13, wherein the distance measurement acquisition instrument 13 is used for acquiring the length of the temporary channel system, and on the basis, whether the length of the temporary channel system is matched with the distance between the cantilever end I10 and the cantilever end II 11 can be further judged. By way of example, the distance measuring and collecting instrument 13 is installed on the guardrail upright 51 at the first safety sliding door 60, and emits a laser line to the guardrail upright 51 at the second safety sliding door 62, so as to further determine the length of the temporary passage system by collecting the distance between the two guardrail uprights 51.
Further, the temporary channel system further includes a controller 70, and the controller 70 is further configured to collect sensing information of the sensing chips a, b, c, and d, and send a door opening or closing instruction to the first moving mechanism 61 and the second moving mechanism 63 according to the collected information. Still further, emergency exit department still is provided with voice broadcast audio amplifier 72, controller 70 is used for controlling voice broadcast audio amplifier 72 to send voice message.
Example two
Step one, assembling a temporary channel system communicated with the cantilever end of the continuous beam bridge at the cantilever end I10, and adjusting the distance between a longitudinal beam I20 and a longitudinal beam II 21 through an adjusting device 30 to enable the length of the temporary channel system to be matched with the distance between the cantilever end I10 and the cantilever end II 11; the temporary channel system is hoisted into place with one end of the first stringer 20 secured to the first boom end 10 and one end of the second stringer 21 secured to the second boom end 11.
And step two, controlling a first safety sliding door 60 through a first moving mechanism 61 and controlling a second safety sliding door 62 through a second moving mechanism 63 to finish personnel passing.
Further, the temporary passage system further includes a distance measuring and collecting device 13, and the distance between the first longitudinal beam 20 and the second longitudinal beam 21 is adjusted by the adjusting device 30 in the setting manner of the distance measuring and collecting device 13, which specifically includes:
step 1-1, the length D of the temporary channel system is measured by the distance measuring and collecting instrument 131By manually measuring the distance D between the first 10 and the second 11 cantilever ends2；
Step 1-2, adjusting the distance between the first longitudinal beam 20 and the second longitudinal beam 21 through the adjusting device 30 to enable D1And D2And (4) matching. Furthermore, the adjusting device 30 includes a roller 31, a first wireless motor actuator 32, a rotating disc 33, a hollow screw 34, an internal thread loop bar 35, and a fixed connecting rod 36, the connection relationship among the components of the adjusting device 30 is as described in the first embodiment, if the manual measurement result is greater than the measurement result of the range finder 13, the controller 70 sends an anticlockwise rotation instruction to the first wireless motor actuator 32, and the first wireless motor actuator 32 executes the anticlockwise rotation instruction to drive the rotating disc 33 and the hollow screw 34 to rotate anticlockwise; because the internal thread loop bar 35 is fixed with the end of the second longitudinal beam 21, the corresponding hollow screw 34 is slowly pushed out, so that the first longitudinal beam 20 is driven to be pushed out backwards, meanwhile, the telescopic adjusting beam plate 40 is driven to be adaptively stretched, and the telescopic part of the corresponding guardrail cross rod is also adaptively stretched until the monitoring result of the distance measuring and collecting instrument 13 is matched with the manual measuring result. And if the manual measurement result is smaller than the measurement result of the distance measurement acquisition instrument 13, the operation is reversed.
Further, the first cantilever end 10 and the second cantilever end 11 are provided with tracks 12 along the width direction, the two ends of the temporary channel system are provided with sliding bolts 23, and the sliding bolts 23 are matched with the tracks 12. After the temporary channel system is hoisted in place, the sliding clamping bolts 23 at the two ends of the temporary channel system are respectively positioned in the track 12 at the end part of the first cantilever end 10 and the track 12 at the end part of the second cantilever end 11, and the temporary channel system is slid to a specified position.
Furthermore, two sides of the first safety sliding door 60 and two sides of the second safety sliding door 62 are respectively provided with a sensing chip 71, the sensing chips 71 from the first cantilever end 10 to the second cantilever end 11 are sequentially marked as a, b, c and d, and the sensing chips 71 are used for sensing whether a person passes through the door. Considering the principles of suspended passing and safety ascending, the temporary channel system realizes the flow-limiting passing, namely only one person can pass through each time. In the second step, the first moving mechanism 61 controls the first safe moving door 60, and the second moving mechanism 63 controls the second safe moving door 62 to complete personnel passing, which specifically comprises the following steps:
step 2-1, when the sensing chip a senses that the person needs to pass, sending passing request information to the controller 70;
step 2-2, after receiving the information, the controller 70 judges whether a person stays in the channel; if yes, the controller 70 sends a closing maintaining instruction to the first moving mechanism 61, preferably, the controller 70 also sends a warning broadcasting instruction to the voice broadcasting sound box 72 to remind constructors of waiting quietly and passing after no person exists in the channel; if not, the controller 70 sends a door opening instruction to the first moving mechanism 61, and after the first moving mechanism 61 receives the door opening instruction, the door opening operation is executed, and the first safe moving door 60 is opened;
step 2-3, after the first safety sliding door 60 is opened, personnel enter the passage, the sensing chip b senses that the personnel pass through the passage, and the passing confirmation information is sent to the controller 70; the controller 70 sends a door closing instruction to the first moving mechanism 61, and after the first moving mechanism 61 receives the door closing instruction, the door closing operation is executed, and the first safe moving door 60 is closed;
step 2-4, the sensing chip c senses that the person passes through and sends a passing confirmation message to the controller 70; the controller 70 sends a door opening instruction to the second moving mechanism 63, and after the second moving mechanism 63 receives the door opening instruction, the door opening operation is executed, and the second safe moving door 62 is opened;
step 2-5, after the second safety sliding door 62 is opened, the personnel leave the passage, the sensing chip 71d senses that the personnel pass through, and sends passing confirmation information to the controller 70; the controller 70 issues a door closing instruction to the second moving mechanism 63, and after the second moving mechanism 63 receives the door closing instruction, the door closing operation is executed, so that the second safe moving door 62 is closed.
It should be noted that, whether a person remains in a channel is judged: the first safety sliding door 60 and the second safety sliding door 62 are both in a closed state, and the controller 70 acquires that the person entering the passage is out of the passage through the sensing chip d by the sensing chip b. The steps 2-1 to 2-5 realize the flow control of the person walking from the cantilever end I to the cantilever end II, the flow control is a closed-loop flow, after the closed-loop flow is completed, the controller judges that the temporary channel system is in a closed loop state, otherwise, the temporary channel system is judged to be in a non-closed loop state. The rule for determining whether a person remains in the channel may also be expressed as that the controller determines whether the temporary channel system is in a closed loop state. And further, the rule of judging whether the channel has a person stay further comprises induction chips b and c for inducting and judging whether a person stays nearby. In addition, the passing personnel can be identified by the camera, the number of the passing personnel can be identified, the safety passing of the personnel can be controlled conveniently, the identity information can be identified, the construction management is convenient, and the personnel information can be acquired by adopting a radio frequency acquisition technology.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A temporary channel system for the intercommunication between the cantilever ends of continuous beam bridges is used for the intercommunication between the cantilever end I and the cantilever end II of two adjacent piers,
the temporary channel system comprises a longitudinal beam I, a longitudinal beam II, an adjusting device, a telescopic adjusting beam plate, a channel beam plate, a guardrail structure, a safety sliding door I, a moving mechanism I, a safety sliding door II and a moving mechanism II;
one end of the first longitudinal beam is fixed with the first cantilever end, the other end of the first longitudinal beam is spliced with one end of the second longitudinal beam through an adjusting device, and the other end of the second longitudinal beam is supported on the second cantilever end; the adjusting device is used for adjusting the distance or the lap joint length between the first longitudinal beam and the second longitudinal beam;
the telescopic adjusting beam plate is laid in the adjusting range of the adjusting device; the channel beam plate is laid on the first longitudinal beam and the second longitudinal beam;
the first safety sliding door is arranged at one end of the first longitudinal beam, which is close to the first cantilever end, and the first moving mechanism is used for opening and closing the first safety sliding door; the second safety sliding door is arranged at one end, close to the second cantilever end, of the second longitudinal beam, and the second moving mechanism is used for opening and closing the second safety sliding door;
the guardrail structure is arranged on the first longitudinal beam and the second longitudinal beam.
2. The continuous beam bridge cantilevered end intercommunicating temporary pathway system of claim 1,
the adjusting device comprises a roller, a first wireless motor actuator, a turntable, a hollow screw, an internal thread loop bar and a fixed connecting rod;
a fixed connecting rod is arranged at the end part of the first longitudinal beam;
the first wireless motor actuator is hollow and is embedded and sleeved on the fixed connecting rod and is fixedly connected with one end part of the longitudinal beam;
the turntable is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the first wireless motor actuator;
the hollow screw is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the rotary table, and the outer wall of the hollow screw is provided with an external thread;
an internal thread loop bar is arranged at the end part of the longitudinal beam II, is of a hollow design and comprises a thread connecting part and a sliding part; the inner wall of the threaded connecting part is provided with an internal thread, and the internal thread is matched with the external thread of the hollow screw rod; the inner side of the sliding part is provided with a roller, the hollow part of the sliding part is matched with one end part of the longitudinal beam in size, and the roller is supported on the first longitudinal beam.
3. The continuous beam bridge cantilevered end intercommunicating temporary pathway system of claim 1,
the two sides of the first safe sliding door and the two sides of the second safe sliding door are respectively provided with an induction chip, and the induction chips are used for inducing passers-by.
4. The continuous beam bridge cantilevered end intercommunicating temporary pathway system of claim 3,
the temporary channel system further comprises a controller; the controller is used for acquiring the induction information of the induction chip and sending door opening or closing instructions to the first moving mechanism and the second moving mechanism according to the acquired information.
5. The continuous beam bridge cantilevered end intercommunicating temporary pathway system of claim 1,
the first moving mechanism comprises a second wireless motor actuator, a telescopic pull rod and an iron buckle;
the wireless motor actuator II is arranged on the longitudinal beam I and used for receiving the instruction and driving the telescopic pull rod to stretch, and the telescopic pull rod drives the first safety sliding door to open and close;
one side of the iron buckle is fixedly connected with the bottom of the safety door, the other side of the iron buckle is connected with one side of the telescopic pull rod, and the other side of the telescopic pull rod is connected with the second wireless motor actuator.
6. The continuous beam bridge cantilevered end intercommunicating temporary pathway system of claim 1,
the temporary channel system comprises a cantilever end I and a cantilever end II, wherein rails are arranged on the cantilever end I and the cantilever end II along the width direction, the end parts of the longitudinal beam I and the longitudinal beam II are provided with cross beams, the bottom of each cross beam is provided with a sliding clamping bolt, the sliding clamping bolts are matched with the rails, and the sliding clamping bolts are arranged in the rails and can slide along the rails and brake, so that the transverse position of the temporary channel system is controlled.
7. A method for intercommunicating cantilever ends of a continuous beam bridge is characterized by comprising the following steps:
step one, assembling a temporary channel system communicated with the cantilever end of the continuous beam bridge according to claim 1 at the cantilever end I, and adjusting the distance between the first longitudinal beam and the second longitudinal beam through an adjusting device to enable the length of the temporary channel system to be matched with the distance between the first cantilever end and the second cantilever end; and hoisting the temporary channel system in place, fixing one end of the first longitudinal beam on the first cantilever end, and fixing one end of the second longitudinal beam on the second cantilever end.
And step two, controlling the first safe sliding door and the second safe sliding door through the first moving mechanism and the second moving mechanism to complete personnel passing.
8. The method of interconnecting cantilevered ends of a continuous beam bridge of claim 7,
the temporary channel system also comprises a distance measurement acquisition instrument, and the distance measurement acquisition instrument is used for acquiring the length of the temporary channel system;
in the first step, the distance between the first longitudinal beam and the second longitudinal beam is adjusted through an adjusting device, and the method specifically comprises the following steps:
step 1-1. measuring the length D of the temporary channel system by the distance measuring and collecting instrument1Manually measuring the distance D between the first cantilever end and the second cantilever end2；
Step 1-2, adjusting the distance between the first longitudinal beam and the second longitudinal beam through an adjusting device to enable D1And D2And (4) matching.
9. The method of interconnecting cantilevered ends of a continuous beam bridge of claim 8,
the adjusting device comprises a roller, a first wireless motor actuator, a turntable, a hollow screw, an internal thread loop bar and a fixed connecting rod; a fixed connecting rod is arranged at the end part of the first longitudinal beam; the first wireless motor actuator is hollow and is embedded and sleeved on the fixed connecting rod and is fixedly connected with one end part of the longitudinal beam; the turntable is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the first wireless motor actuator; the hollow screw is hollow, is embedded and sleeved on the fixed connecting rod and is fixedly connected with the rotary table, and the outer wall of the hollow screw is provided with an external thread; an internal thread loop bar is arranged at the end part of the longitudinal beam II, is of a hollow design and comprises a thread connecting part and a sliding part; the inner wall of the threaded connecting part is provided with an internal thread, and the internal thread is matched with the external thread of the hollow screw rod; the inner side of the sliding part is provided with a roller, the size of the hollow part of the sliding part is matched with that of one end part of the longitudinal beam, and the roller is supported on the first longitudinal beam;
in the step 1-2, the distance between the first longitudinal beam and the second longitudinal beam is adjusted through an adjusting device, so that D1And D2The matching specifically comprises the following steps:
if the manual measurement result is greater than the measurement result of the distance measurement acquisition instrument, the controller sends an anticlockwise rotation instruction to the first wireless motor actuator, and the first wireless motor actuator executes the anticlockwise rotation instruction to drive the rotary disc and the hollow screw to rotate anticlockwise; because the internal thread loop bar and the two end parts of the longitudinal beam are fixed, the corresponding hollow screw rod is slowly pushed out, so that the longitudinal beam is driven to be pushed out backwards, meanwhile, the telescopic adjusting beam plate is driven to be stretched adaptively, and the corresponding guardrail structure is also stretched adaptively until the monitoring result of the distance measuring acquisition instrument is matched with the manual measurement result;
if the manual measurement result is smaller than the measurement result of the distance measurement acquisition instrument, the controller sends a clockwise rotation instruction to the first wireless motor actuator, and the first wireless motor actuator executes the clockwise rotation instruction to drive the turntable and the hollow screw to rotate clockwise; because the internal thread loop bar is fixed with longeron both ends, then corresponding cavity screw rod slowly precession to drive longeron and be close to for two longitudinal one earlier on, drive the flexible beam slab adaptability shrink of adjusting simultaneously, corresponding flexible regulation guardrail also adaptability shrink until range finding collection appearance monitoring result and artifical measuring result phase-match.
10. The method of interconnecting cantilevered ends of a continuous beam bridge of claim 7,
the two sides of the first safety sliding door and the two sides of the second safety sliding door are respectively provided with an induction chip, the induction chips from the first cantilever end to the second cantilever end are marked as a, b, c and d in sequence, and the induction chips are used for inducing whether a person passes through the induction chips;
in the second step, the first moving mechanism controls the first safe moving door and the second moving mechanism controls the second safe moving door to complete personnel passing, and the method specifically comprises the following steps:
step 2-1, when the sensing chip a senses that the personnel need to pass, sending pass request information to the controller;
step 2-2, after the controller receives the information, judging whether a person stays in the channel; if yes, the controller sends a closing maintaining instruction to the first moving mechanism; if not, the controller sends a door opening instruction to the first moving mechanism, and after the first moving mechanism receives the door opening instruction, the door opening operation is executed, and the first safe moving door is opened;
2-3, after the safety sliding door is opened, a person enters the channel, the sensing chip b senses that the person passes through the channel, and the sensing chip b sends a passing confirmation message to the controller; the controller issues a door closing instruction to the first moving mechanism, and the first moving mechanism executes door closing operation after receiving the door closing instruction, and closes the first safe moving door;
2-4, the sensing chip c senses that a person passes through the sensing chip and sends passing confirmation information to the controller; the controller sends a door opening instruction to the second moving mechanism, and the second moving mechanism executes door opening operation after receiving the door opening instruction, so that the second safe moving door is opened;
step 2-5, after the second safety sliding door is opened, the personnel leave the passage, the sensing chip d senses that the personnel pass through the passage and sends a passing confirmation message to the controller; and the controller issues a door closing instruction to the second moving mechanism, and the second moving mechanism executes door closing operation after receiving the door closing instruction, so that the second safe moving door is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210366808.6A CN114703755B (en) | 2022-04-08 | 2022-04-08 | Continuous beam bridge cantilever end intercommunication temporary channel system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210366808.6A CN114703755B (en) | 2022-04-08 | 2022-04-08 | Continuous beam bridge cantilever end intercommunication temporary channel system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114703755A true CN114703755A (en) | 2022-07-05 |
| CN114703755B CN114703755B (en) | 2023-10-24 |
Family
ID=82173197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210366808.6A Active CN114703755B (en) | 2022-04-08 | 2022-04-08 | Continuous beam bridge cantilever end intercommunication temporary channel system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114703755B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04133852U (en) * | 1991-05-30 | 1992-12-14 | ドーエイ外装有限会社 | crossing passage |
| JPH08319664A (en) * | 1995-05-23 | 1996-12-03 | Fujita Corp | Expansion joint |
| JPH10140674A (en) * | 1996-11-13 | 1998-05-26 | Fudo Constr Co Ltd | Expansion joint between buildings |
| JP2000027318A (en) * | 1998-07-07 | 2000-01-25 | Doei Gaiso Kk | Floor connection device |
| JP2000064438A (en) * | 1998-08-21 | 2000-02-29 | Doei Gaiso Kk | Expandable wall |
| CN102359079A (en) * | 2011-08-01 | 2012-02-22 | 江西百胜门控设备有限公司 | Cantilever telescopic channel machine |
| JP2012092515A (en) * | 2010-10-25 | 2012-05-17 | Dooei Gaiso Kk | Floor joint device for high-rise floor |
| CN104018575A (en) * | 2014-05-05 | 2014-09-03 | 泰兴市第一建筑安装工程有限公司 | High-rise tower corridor steel structure |
| CN211255057U (en) * | 2019-12-17 | 2020-08-14 | 中建二局第三建筑工程有限公司 | Tower crane gap bridge channel structure |
-
2022
- 2022-04-08 CN CN202210366808.6A patent/CN114703755B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04133852U (en) * | 1991-05-30 | 1992-12-14 | ドーエイ外装有限会社 | crossing passage |
| JPH08319664A (en) * | 1995-05-23 | 1996-12-03 | Fujita Corp | Expansion joint |
| JPH10140674A (en) * | 1996-11-13 | 1998-05-26 | Fudo Constr Co Ltd | Expansion joint between buildings |
| JP2000027318A (en) * | 1998-07-07 | 2000-01-25 | Doei Gaiso Kk | Floor connection device |
| JP2000064438A (en) * | 1998-08-21 | 2000-02-29 | Doei Gaiso Kk | Expandable wall |
| JP2012092515A (en) * | 2010-10-25 | 2012-05-17 | Dooei Gaiso Kk | Floor joint device for high-rise floor |
| CN102359079A (en) * | 2011-08-01 | 2012-02-22 | 江西百胜门控设备有限公司 | Cantilever telescopic channel machine |
| CN104018575A (en) * | 2014-05-05 | 2014-09-03 | 泰兴市第一建筑安装工程有限公司 | High-rise tower corridor steel structure |
| CN211255057U (en) * | 2019-12-17 | 2020-08-14 | 中建二局第三建筑工程有限公司 | Tower crane gap bridge channel structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114703755B (en) | 2023-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2682122C2 (en) | Specialised overhead public transport | |
| CN109944451A (en) | Across both wired construction safety protection device and its construction method in one kind | |
| CN103882812A (en) | Construction method for midspan main beams of cable-stayed bridge | |
| CN111778857B (en) | Process for synchronously erecting upper and lower beams of double-layer overhead bridge of urban public rail | |
| CN114703755A (en) | System and method for intercommunicating temporary channels at cantilever ends of continuous beam bridge | |
| US20050223608A1 (en) | Sliding sign | |
| US5836423A (en) | People mover system | |
| CN209133986U (en) | A kind of high-tension line crossing construction cableway-type pulley combination | |
| CN113235460B (en) | Prefabricated segment swinging method for bridge cantilever assembly | |
| CN205348000U (en) | Cradle construction device of asymmetric arc variable cross section thin wing board case roof beam | |
| KR101003403B1 (en) | Moving bridge inspection equipment | |
| CN108374587B (en) | Aerial stereo garage crossing road or river | |
| CN113931388B (en) | Building waterproof cloth construction equipment based on umbelliform structural design | |
| CN106976780B (en) | The plug-in rotating formula elevator that can be run in the stair shaft of staircase | |
| CN106013234B (en) | The construction method of underground pipe gallery | |
| CN208501490U (en) | Adapt to the bridge-checking vehicle of heavy grade rail running | |
| SU1546534A1 (en) | Suspension bridge and method of mounting same | |
| CN109487817A (en) | A kind of three cabin intersection bar construction of piping lane road | |
| CN218145518U (en) | Construction elevator system attached to tower crane | |
| CN114362034B (en) | Method for replacing overhead ground wire by corridor wiring | |
| CN220598130U (en) | Connecting structure for ramp of pedestrian bridge and existing building | |
| CN220412690U (en) | Temporary hoisting device for prefabricated reinforcement cage of highway reconstruction and expansion project | |
| CN215558503U (en) | Double-side synchronous hoisting equipment suitable for rear cantilever arm of composite-section beam bridge | |
| CN114016422B (en) | Steel girder erection method | |
| CN215291266U (en) | High practicality inserted lift scaffold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |