CN110396941B - Bridge pier column construction system and construction method - Google Patents
Bridge pier column construction system and construction method Download PDFInfo
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- CN110396941B CN110396941B CN201910779265.9A CN201910779265A CN110396941B CN 110396941 B CN110396941 B CN 110396941B CN 201910779265 A CN201910779265 A CN 201910779265A CN 110396941 B CN110396941 B CN 110396941B
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 230000009194 climbing Effects 0.000 claims abstract description 179
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000001360 synchronised effect Effects 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000009415 formwork Methods 0.000 description 10
- 230000007306 turnover Effects 0.000 description 9
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000009417 prefabrication Methods 0.000 description 4
- 239000011800 void material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000009751 slip forming Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- 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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- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bridge pier column construction system and a construction method, wherein the system is applied to pier column construction with an inner cavity, and comprises an inner template and an inner template platform bracket in the inner cavity, an outer template and an outer template bracket on the periphery of the outer template; when the method is applied to the construction of the pier stud without the inner cavity, the pier stud comprises an outer template and an outer template support arranged on the periphery of the outer template; template lifting channels are reserved between the inner die platform bracket and the inner die plate and between the outer die platform bracket and the outer die plate. For pier stud construction with an inner cavity, the inner mold platform support and the outer mold platform support are connected into a whole through a plurality of climbing supports, and for pier stud construction without an inner cavity, the opposite sides of the outer mold platform support are connected into a whole through a plurality of climbing supports; the climbing device is characterized in that climbing rods are pre-buried on two sides of the bottom building body of the pier column corresponding to each climbing support, synchronous climbing of the inner and outer die platform supports or stable climbing of the outer die platform supports are realized at positions, corresponding to the climbing rods, on the climbing supports, of the climbing supports, and a lifting device capable of horizontally moving is arranged on the climbing supports and used for overturning the dies.
Description
Technical Field
The invention relates to a bridge construction system, in particular to a bridge pier column construction system and a construction method.
Background
In the construction of high piers of railway or highway bridges, three common construction modes are climbing formwork, sliding formwork and turning formwork construction respectively. The climbing form construction operation is safe and reliable, the wind resistance is strong, but the climbing form construction cost is high, the operation efficiency is low, and the appearance quality is general; the slip form construction speed is high, but the labor intensity is high, and the concrete surface quality is poor; the surface quality of the concrete for the turnover formwork construction is high, but the construction period is long, the wind resistance is poor, and the danger coefficient is high.
In order to solve the problems, ZL201510037943.6 discloses a self-climbing slip-over construction system and a construction method, which are characterized in that on a slip form structure, an outer mold support climbs one section to be poured at a time, and then the outer mold plate is hoisted to the section to be poured by using the climbing support; the internal mold is constructed by adopting a sliding mold. The construction method solves the problem of the quality of the outer surface of the pier to a certain extent, but has the following problems.
Firstly, the construction mode of the sliding mode for the inner die and the outer die of the structure disclosed by the patent are mutually independent, the construction mode of the sliding mode for the inner die and the construction mode of the turnover mode for the outer die are adopted, because pier body concrete is poured without dividing the inside and the outside, according to regulations GB50113-2005 sliding template engineering technical Specification and latest sliding template construction regulations solicitation opinion manuscript GB50113-2017, the climbing height of the sliding mode is 200-400mm each time, the outer die is used for turnover mode construction after a concrete section (usually 2 m) is poured, the inner die and the outer die cannot be synchronous, in the large-section pier body construction, the templates are usually penetrated by pull rods, and the inner die and the outer die cannot be synchronously pulled or are frequently disassembled and assembled by the pull rods, so that the templates can be greatly deformed or misplaced.
Secondly, the semi-automatic mould turning device of the patent comprises a jack, wherein the jack is fixed through a jack climbing rod embedded in poured concrete, one end of a connecting sliding rail cross rod is connected with the jack, and the other end of the connecting sliding rail cross rod is connected with a main vertical rod. Obviously, this kind of structure can make the pole-climbing unbalance loading, and the load of outer mould support transmission can produce moment of flexure to the pole-climbing to make the pole-climbing unstability, easy safety problem.
Third, in the construction of large section high piers, the size of the pier body section is proportional to the weight of the platform support, the weight of the platform support is proportional to the load borne by the climbing pole, the run-out length of the climbing pole is inversely proportional to the bearing capacity of the climbing pole, and the section size of the climbing pole is proportional to the bearing capacity of the climbing pole. The climbing rod is embedded in the concrete, the section size of the climbing rod cannot be too large, but the requirement on the void length is large, and the requirement on the bearing capacity is high. This patent obviously fails to meet the above requirements with a single row of climbing poles.
Fourth, the existing high pier concrete pouring construction is that the synchronization of climbing process is controlled manually, the manual elevation measurement and rechecking are carried out after climbing a stage, and climbing is continued after elevation adjustment, so that the risk of accumulated deviation generated by frequent measurement is increased, the labor intensity of workers is increased, and the construction efficiency is affected.
Disclosure of Invention
Aiming at the problems, the invention provides the inner and outer die platform brackets which can synchronously and stably climb by combining the advantages of high slip form construction speed and good concrete quality of the turnover form construction; lifting the template to perform turnover construction; the bridge pier column construction system and the construction method have the advantages of large climbing rod void height, large bearing capacity and automatic detection and adjustment of the climbing total height.
The bridge pier column construction system provided by the invention is applied to pier column construction with an inner cavity, and comprises an inner template, an inner template platform bracket in the inner cavity of the inner template, an outer template and an outer template bracket on the periphery of the outer template; when the method is applied to the construction of the pier stud without the inner cavity, the pier stud comprises an outer template and an outer template support arranged on the periphery of the outer template; template lifting channels are reserved between the inner die platform bracket and the inner die plate and between the outer die platform bracket and the outer die plate. For pier stud construction with an inner cavity, the inner die platform bracket and the outer die platform bracket are connected into a whole through a plurality of climbing brackets, and for pier stud construction without an inner cavity, the opposite sides of the outer die platform bracket are connected into a whole through a plurality of climbing brackets; the inner side and the outer side of the pier body corresponding to the positions of the climbing brackets are respectively embedded with climbing rods, the climbing brackets are provided with linear lifting devices corresponding to the climbing rods, climbing of the climbing rods is realized through telescopic movement of the lifting devices, synchronous climbing of the inner and outer die platform brackets or stable climbing of the outer die platform brackets is realized along climbing of the climbing rods by the lifting devices, and the climbing brackets are provided with lifting devices capable of horizontally moving for turning the dies.
In one embodiment of the above system, the climbing support comprises two F-shaped supports and an upper and a lower cross beam between the two F-shaped supports, which are symmetrically arranged.
In one embodiment of the above system, the vertical beam of the F-bracket includes a lower section and an upper section that are detachably connected.
In one embodiment of the system, the lower end of the lower section of the vertical beam of the F-shaped bracket is vertically connected with a horizontal stay rod extending to the building body, and the tail end of the horizontal stay rod is connected with a support roller capable of rolling up and down along the building body.
In one embodiment of the system, for pier stud construction with an inner cavity, a detachable anti-falling anti-wind pull rod is arranged between the F-shaped bracket and the inner and outer templates; and a detachable anti-falling and wind-resistant pull rod is arranged between the F-shaped bracket and the outer template for pier stud construction without an inner cavity.
In one embodiment of the system, the jacking device is a through cylinder, the piston rod and the cylinder sleeve of the jacking device are respectively provided with an axial center hole, and the bottom surface of the cylinder sleeve and the top surface of the piston rod are respectively fixed with a clamping device corresponding to the axial center holes.
In one embodiment of the above system, the climbing rod is any one of a round pipe, a round rod, a square pipe or square steel, the upper end of the climbing rod passes through the lower cross beam of the F-shaped bracket, the jacking device is sleeved on the climbing rod in a penetrating manner, the climbing rod is clamped by the clamping device, and the bottom surface of the jacking device and the lower cross beam are fixed into a whole.
In one embodiment of the system, the bottoms of the inner mold platform bracket and the outer mold platform bracket are respectively connected with a suspension type platform bracket, and the inner mold platform bracket, the outer mold platform bracket and the suspension type platform bracket are respectively provided with a reversible walking platform corresponding to each pouring section.
The method for constructing the bridge pier column with the inner cavity by using the system provided by the invention comprises the following steps:
(1) Pouring construction of the bottom pier, and embedding two groups of climbing poles according to the set positions;
(2) Fixing each climbing bracket on each group of climbing rods through a jacking device, and enabling the telescopic rods of each jacking device to be in a contracted and in-place state;
(3) Respectively fixing the inner die platform bracket and the outer die platform bracket with the climbing bracket, and adjusting elevation of the two platform brackets;
(4) The inner die platform bracket and the outer die platform bracket are respectively connected and fixed with the inner die plate and the outer die plate through anti-falling and anti-wind pull rods;
(5) Binding the steel bars of the section to be poured;
(6) Dismantling an anti-falling anti-wind pull rod;
(7) Removing slag from the lowest layer of templates, and then hoisting the layer of templates to the bound steel bar segments by a hoisting device on each climbing bracket;
(8) The elevation of the inner template and the elevation of the outer template are adjusted, the inner template and the outer template are fixed, the anti-falling anti-wind pull rod is connected, and the walking platform covers the template lifting channel;
(9) Pouring the segment and curing;
(10) Disassembling an anti-falling anti-wind pull rod, and overturning and opening the walking platform upwards;
(11) Enabling each jacking device to carry the inner die platform bracket and the outer die platform bracket to climb upwards along the climbing rod at the same time to form a section to be poured;
(12) Repeating the steps (4) - (11) until the casting of the last segment is completed.
In one embodiment of the method, a first sensor for measuring single climbing displacement is arranged on the climbing bracket, a second sensor for measuring single stroke of the climbing bracket is arranged on the jacking device, the first sensor and the second sensor feed back measurement data to the controller, and the controller sends a working instruction to the jacking device after data analysis;
in the step (2), the current value of the second sensor is recorded when the telescopic rod of each jacking device is retracted and used as the zero value of the second sensor of the jacking device, and the current stroke value S of the corresponding jacking device is obtained by subtracting the zero value of the sensor from the real-time value of the second sensor in the running process of the jacking device;
zero value calibration is carried out on the second sensor before each climbing of the jacking device;
in step (11), the minimum value S of the single stroke of the jacking device is determined according to the value measured by the second sensor min Determining a maximum value H of the total displacement of the single climb by means of the value measured by the first sensor max And a minimum value H min Will minimum value S min Sequentially detecting the current stroke value of each jacking device by a second sensorS, comparing to obtain the current stroke value S of each jacking device and the minimum value S of single stroke of the jacking device min The processing procedure after the difference of (2) is as follows:
(11.1) synchronization of climbing procedure
If one or more of the difference values is greater than the preset value 1, the jacking devices with larger difference values are sequentially stopped, and when the current stroke value S of the jacking devices is equal to the minimum value S of a single stroke of the jacking devices min When the difference value of the two sections is smaller than a preset value 2, starting the jacking devices until the height of one section to be poured is synchronously raised;
(11.2) determining whether it has arrived
Setting an upper deviation and a lower deviation of the total travel, wherein the difference value of the upper deviation and the lower deviation is larger than the difference value of the maximum value and the minimum value in synchronous adjustment;
comparing the minimum value H of the total displacement of single climbing min The lower deviation from the setting range of the total travel is used for obtaining the minimum value H of the total displacement of single climbing min The difference value of the deviation from the total stroke setting is greater than 0, and if the difference value is greater than 0, the total stroke is completed;
(11.3) leveling
When the difference between the maximum value and the minimum value of the total climbing height of the jacking device is larger than the difference between the upper deviation and the lower deviation of the total travel setting, the jacking device with smaller total climbing height is started until the difference between the maximum value and the minimum value of the total climbing height of the jacking device is smaller than the difference between the upper deviation and the lower deviation of the total travel setting, namely leveling.
The invention can be applied to prefabrication construction of pier columns with inner cavities and pier column construction without inner cavities. When the device is applied to prefabrication construction of an inner cavity pier stud, an inner die platform bracket and an outer die platform bracket are connected into a whole through a plurality of climbing brackets, two lifting devices, two jacking devices and a first sensor for measuring single climbing total displacement are arranged on the climbing brackets, and meanwhile, second sensors capable of measuring single stroke of the two jacking devices are respectively arranged on the two jacking devices, and each climbing bracket climbs along an inner embedded climbing rod and an outer embedded climbing rod. Compared with the prior art, the method has the following advantages: in the climbing process, the inner die platform bracket and the outer die platform bracket are connected into a whole through the climbing bracket to realize synchronous climbing, so that the condition of instability of a climbing rod caused by unbalanced load and unsynchronized climbing can be avoided; the climbing pole adopts an inner and outer double-arrangement structure, and the inner and outer die platform brackets are connected into a whole, so that the load can be effectively distributed on the inner and outer climbing poles, the bearing capacity of the climbing pole is higher, the void height is higher, and the turnover die space of the inner and outer die plates and the requirements of bridge high pier construction can be met; after the concrete of one section is poured, the inner die and the outer die are constructed by adopting a turnover die process through a lifting device, the inner die and the outer die cannot move in the period from pouring the concrete to removing the die, dislocation cannot occur, the reinforcement process of the concrete cannot be deformed due to the movement of the die, namely, the strength of the concrete is higher when the concrete is demolded than that of a sliding die, the surface of the die is cleaned after each demolding, and the surface quality of the concrete is ensured; the two sensors at different positions can feed back the single stroke and total climbing displacement of the jacking device in real time, and can correct each other, so that climbing synchronism is ensured; the climbing operation can be completed by one person, and only the elevation is required to be manually rechecked after the climbing is completed, so that the elevation is not required to be manually measured and adjusted; the labor cost is low. When the method is applied to prefabrication of the pier stud without the inner cavity, as an inner template and an inner die platform bracket are not needed, only an outer template and an outer die platform bracket are needed, the opposite sides of the outer die platform bracket are connected into a whole through a climbing bracket, and other pier stud prefabrication construction operations with the inner cavity are referred to.
Drawings
Fig. 1 is a schematic diagram of an axial structure according to an embodiment of the present invention.
Fig. 2 is a schematic top view of the present embodiment.
Fig. 3 is a side view schematic of fig. 2.
Fig. 4 is a schematic view of the distance measured by the sensor in fig. 3.
Fig. 5 is a schematic diagram of an initial lifting position of the bottom template.
Fig. 6 is a schematic view of the bottom form being lifted into place.
Fig. 7 is a schematic view of the assembly of the detachable suspended platform support and the overmolded platform support of fig. 1.
Fig. 8 is a schematic diagram of the operation of the roll-over walking platform.
Fig. 9 is a schematic view of the lower section of the F-shaped bracket installed on the inner side of the building during the construction of the bottom layer.
FIG. 10 is a schematic view of the present invention for a building no-inner mold platform support.
Reference numerals in the drawings:
1-an inner template; 2-an outer template; 3-an inner mold platform bracket; 4-an outer mold platform bracket;
5. a climbing assembly;
51-climbing support; 52-an oil cylinder; 53-lifting device; 54-climbing a pole;
511-F type stents; 512-connection beams; 513-sensor mounting beams;
6-a first sensor; 7-a second sensor;
8-a walking platform; 9-an anti-falling anti-wind pull rod;
10-hanging platform support; 11-supporting rollers;
Detailed Description
As shown in fig. 1, the bridge pier construction system disclosed in this embodiment is used for bridge pier construction with an inner cavity, an inner formwork 1 and an outer formwork 2 assembled in large blocks are respectively fixed on the inner side and the outer side of a set thickness of a bridge pier building body, an inner formwork platform bracket 3 is fixed in the inner cavity surrounded by the inner formwork 1, and an outer formwork platform bracket 4 is fixed on the periphery of the outer formwork 2. And a template lifting channel TD which can meet the requirement of turning the mold is reserved between the inner template platform bracket 3 and the inner template 1 and between the outer template platform bracket 4 and the outer template 2. Namely, a certain interval is reserved between the inner mold platform bracket 3 and the inner mold plate 1 and between the outer mold platform bracket 4 and the outer mold plate 2.
The inner die platform bracket and the outer die platform bracket are connected into a whole through a plurality of groups of climbing assemblies 5, so that synchronous climbing can be realized through the climbing brackets.
The cross section of the bridge pier body is rectangular, so that a group of climbing assemblies 5 are respectively arranged at the corners of four groups of corresponding sides of the inner die platform support 3 and the outer die platform support 4, and eight groups of climbing assemblies 5 are all arranged.
As can be seen in connection with fig. 1 to 9, each set of climbing assemblies 5 of the present embodiment comprises a climbing bracket 51, an oil cylinder 52, a lifting device 53 and a climbing rod 54.
The climbing bracket 51 comprises an F-shaped bracket 511, a connecting beam 512 and a sensor mounting vertical beam 513, wherein the upper and lower beams of the two F-shaped brackets 511 are symmetrically arranged, the length of the lower beam is larger than that of the upper beam, the sensor mounting vertical beam 513 is connected between the upper and lower beams, the vertical beams of the two F-shaped brackets are respectively fixed on the inner mold platform bracket 3 and the outer mold platform bracket 4, the connecting beam 512 respectively connects the upper and lower beams of the F-shaped bracket 511 into a whole, and the first sensor 6 feeding back the total climbing height is arranged on the vertical beam 513.
The climbing poles 54 are symmetrically embedded at the inner side and the outer side of the lowest building body corresponding to the climbing support 51, and the upper ends of the climbing poles 54 penetrate through the extending sections of the lower cross beams of the F-shaped supports 511. The climbing rod 54 of the present embodiment adopts a round rod, and may be any one of a round tube, a square tube, or a square steel according to practical situations.
The cylinder 52 is used as a jacking device in this embodiment, the piston rod and the cylinder sleeve of the jacking device are provided with axial center holes, and the top surface of the piston rod and the bottom surface of the cylinder sleeve are respectively fixed with a chuck 521 corresponding to the axial center holes. The chuck can be selected from mechanical chuck and hydraulic chuck, the hydraulic chuck can be purchased, and the mechanical chuck can be in a structure like an upper chuck and a lower chuck in CN200720201446.6 or the like, so that the jacking device is locked on the climbing rod through dead weight.
The oil cylinder 52 is sleeved on the climbing rod 54, the climbing rod 5 is clamped by a chuck (preferably a hydraulic chuck), and the bottom surface of a cylinder sleeve of the oil cylinder and the lower cross beam of the F-shaped bracket are fixed into a whole.
The cylinder 52 is provided with a second sensor 7 which feeds back the stroke of the cylinder, and the stroke S of the cylinder is fed back by the sensor.
The lifting device 53 of this embodiment adopts an outsourcing steel wire rope to hang a lifting trolley, which is mounted on the upper beam of the F-shaped bracket and can move left and right along the upper beam.
The vertical beam of the F-shaped bracket 511 comprises a lower section and an upper section which are detachably connected, the lower end of the lower section is vertically connected with a horizontal stay bar extending to the building body, the tail end of the horizontal stay bar is connected with a supporting roller 11, and the supporting roller 11 can roll up and down the building body.
In order to meet the construction requirements of different pouring sections, the bottoms of the inner die platform bracket 3 and the outer die platform bracket 4 are respectively detachably connected with a suspension type platform bracket 10, and the positions of the inner die platform bracket, the outer die platform bracket and the suspension type platform bracket, which correspond to the pouring sections of each layer, are respectively provided with a reversible walking platform 8. The walking platform covers the template lifting channel during the construction of the segmental concrete, so that the construction is convenient; when the inner and outer templates are hoisted, the walking platform is turned upwards to open the template lifting channel.
The F-shaped brackets on two sides are respectively connected with an anti-falling anti-wind pull rod 9 between the inner template 1 and the outer template 2, and the anti-falling anti-wind pull rods are detachably connected with the inner template and the outer template. The number and the connection angle of the anti-falling anti-wind pull rods 9 can be determined according to actual needs, and as shown in fig. 2, the anti-falling anti-wind pull rods which are horizontally and obliquely arranged are arranged. The functions of the anti-falling and wind-resistant pull rod 9 include anti-falling and wind-resistant. When the inner die platform bracket and the outer die platform bracket climb and the inner die plate and the outer die plate are hoisted and turned over, the anti-falling anti-wind pull rod is removed, and the anti-falling anti-wind pull rod is assembled after climbing or hoisting in place.
According to the structure, the inner die platform support and the outer die platform support of the system are connected into a whole through the climbing supports, the two F-shaped supports, which are connected into a whole, are respectively provided with the jacking devices and the lifting devices, the two jacking devices are clamped on the embedded climbing rods which are arranged in a bilateral symmetry mode, the lifting devices can move left and right along the upper cross beam of the F-shaped supports, synchronous stable climbing of the inner die platform support and the outer die platform support is realized through the movement of the two jacking devices along the climbing rods, and a single stroke is fed back through the second sensor on the oil cylinder, so that climbing in place of each time can be ensured. The single total climbing height H of the oil cylinder is fed back through a first sensor on the F-shaped bracket.
When the climbing support is installed, the climbing rod penetrates through the central hole of the oil cylinder, and the chucks at the two ends of the climbing rod are used for holding the climbing rod tightly, so that loads of the inner die platform support and the outer die platform support are transferred to the climbing rod.
When the climbing support climbs, the anti-falling wind-resistant pull rod between the inner die platform support and the outer die platform support and the corresponding templates is removed, then the oil cylinder works, the lifting device of the climbing support upwards straightens the climbing support through the lower cross beam of the F-shaped support until the lifting distance reaches the stroke of the oil cylinder, the chuck at the lower end of the lifting device is locked, the chuck at the upper end of the lifting device is loosened, the piston rod extends out, then the upper end clamping disc is locked, the chuck at the lower end is loosened, the oil cylinder contracts, the climbing support is circulated until the climbing support reaches the required climbing height, and the supporting roller at the tail end of the F-shaped support rolls along the surface of a building body with the section poured. In the climbing process, the first sensor 7 feeds back the stroke of the jacking device every time, and the total climbing height is fed back through the second sensor.
The specific construction steps of this embodiment are as follows:
(1) Pouring construction of the bottom pier, and embedding two groups of climbing poles according to the set positions;
(2) Assembling each climbing assembly, fixing each climbing bracket on each climbing rod through chucks at two ends of an upper oil cylinder of each climbing bracket, and enabling the telescopic rods of each jacking device to be in a contracted state;
(3) Respectively fixing the inner die platform bracket and the outer die platform bracket with the climbing bracket, and detecting whether the elevation of the top surfaces of the two platform brackets is consistent with the elevation of the joint to be poured;
(4) The inner die platform bracket and the outer die platform bracket are respectively connected and fixed with the inner die plate and the outer die plate through anti-falling and anti-wind pull rods;
(5) Binding the steel bars of the section to be poured;
(6) Dismantling an anti-falling anti-wind pull rod;
(7) Removing slag from the lowest layer of templates, and then hoisting the layer of templates to the bound steel bar segments by a hoisting device on each climbing bracket;
(8) The elevation of the inner template and the elevation of the outer template are adjusted, the inner template and the outer template are fixed, the anti-falling anti-wind pull rod is connected, and the walking platform covers the template lifting channel;
(9) Pouring the segment and curing;
(10) Disassembling an anti-falling anti-wind pull rod, and overturning and opening the walking platform upwards;
(11) Enabling each jacking device to carry the inner die platform bracket and the outer die platform bracket to climb upwards along the climbing rod at the same time to form a section to be poured;
(12) Repeating the steps (4) - (11) until the casting of the last segment is completed.
In the above steps, the lower sections of the vertical beams of the F-shaped brackets are connected when needed, and the bottom of the inner and outer die brackets are connected with the suspended platform brackets.
In the step (2), the current value of the second sensor is recorded when the telescopic rod of each jacking device is retracted and used as the zero value of the second sensor of the jacking device, and the current stroke value S of the corresponding jacking device is obtained by subtracting the zero value of the sensor from the real-time value of the second sensor in the running process of the jacking device;
zero value calibration is carried out on the second sensor before each climbing of the jacking device;
in step (11), the minimum value S of the single stroke of the jacking device is determined according to the value measured by the second sensor min Determining a maximum value H of the total displacement of the single climb by means of the value measured by the first sensor max And a minimum value H min Will minimum value S min Sequentially comparing the current stroke value S of each jacking device detected by the second sensor with the current stroke value S of each jacking device to obtain the current stroke value S of each jacking device and the minimum value S of single stroke of the jacking device min The processing procedure after the difference of (2) is as follows:
(11.1) synchronization of climbing procedure
If one or more of the difference values is greater than the preset value 1, the jacking devices with larger difference values are sequentially stopped, and when the current stroke value S of the jacking devices is equal to the minimum value S of a single stroke of the jacking devices min When the difference value of the two sections is smaller than the preset value 2, the jacking devices are started until the height of one section to be poured is synchronously raised.
(11.2) determining whether it has arrived
Setting an upper deviation and a lower deviation of the total travel, wherein the difference value of the upper deviation and the lower deviation is larger than the difference value of the maximum value and the minimum value in synchronous adjustment;
comparing the minimum value H of the total displacement of single climbing min The lower deviation from the setting range of the total travel is used for obtaining the minimum value H of the total displacement of single climbing min And if the difference is larger than 0, the total stroke is completed. Because the difference between the upper deviation and the lower deviation of the total stroke setting includes the difference between the maximum value and the minimum value of the synchronous lifting, when the minimum value of the total displacement reaches the lower deviation of the total stroke setting, the maximum value does not exceed the upper set valueDeviation, the total stroke of the system is completed.
(11.3) leveling
When the difference between the maximum value and the minimum value of the total climbing height of the jacking device is larger than the difference between the upper deviation and the lower deviation of the total travel setting, the jacking device with smaller total climbing height is started until the difference between the maximum value and the minimum value of the total climbing height of the jacking device is smaller than the difference between the upper deviation and the lower deviation of the total travel setting, namely leveling.
This step is determined according to the actual situation in the field and is not required if all lifting devices have been lifted synchronously and no sliding down has occurred.
The climbing bracket connects the inner die platform bracket and the outer die platform bracket into a whole, so that the climbing bracket can synchronously lift the inner die platform bracket and the outer die platform bracket, and the phenomenon of unbalanced load can not occur; each climbing bracket is fixed on the inner climbing rod and the outer climbing rod, so that the bearing capacity of the jacking device is larger when the jacking device climbs along the climbing rods, the void height of the climbing rods is larger, the turnover space of the inner and outer templates can be met, and the requirements of high pier construction of the bridge can be met; the two lifting devices respectively lift the inner template and the outer template to realize the turnover lifting of the inner template and the outer template; the sensors at two different positions can feed back the single stroke and total climbing displacement of the jacking device in real time, and the two sensors can be mutually corrected, so that climbing synchronism is ensured, and danger caused by accumulated errors in the prior art can be avoided.
The invention can also be used for the construction of the bridge high pier body with solid or internal space without the internal mold platform bracket. Fig. 10 shows a solid pier body. Because the pier body is solid, only the outer template is needed when the pier body is poured, and accordingly only climbing of the outer die platform bracket and turning of the outer die are needed when in construction, and other structures and construction operations can be achieved by referring to the embodiment.
Claims (10)
1. The bridge pier column construction system is applied to pier column construction with an inner cavity and comprises an inner template, an inner template platform bracket in the inner cavity of the inner template, an outer template and an outer template bracket on the periphery of the outer template; when the method is applied to the construction of the pier stud without the inner cavity, the pier stud comprises an outer template and an outer template support arranged on the periphery of the outer template; template lifting channels are reserved between the inner die platform support and the inner die plate and between the outer die platform support and the outer die plate, and the die plate lifting device is characterized in that:
for pier stud construction with an inner cavity, the inner die platform bracket and the outer die platform bracket are connected into a whole through a plurality of climbing brackets, and for pier stud construction without an inner cavity, the opposite sides of the outer die platform bracket are connected into a whole through a plurality of climbing brackets;
the inner side and the outer side of the pier body corresponding to the positions of the climbing brackets are respectively embedded with climbing rods, the climbing brackets are provided with linear lifting devices corresponding to the climbing rods, climbing of the climbing rods is realized through telescopic movement of the lifting devices, synchronous climbing of the inner and outer die platform brackets or stable climbing of the outer die platform brackets is realized along climbing of the climbing rods by the lifting devices, and the climbing brackets are provided with lifting devices capable of horizontally moving for turning the dies.
2. The system of claim 1, wherein: the climbing support comprises two F-shaped supports and an upper cross beam and a lower cross beam which are symmetrically arranged between the two F-shaped supports.
3. The system according to claim 2, wherein: the vertical beam of the F-shaped bracket comprises a lower section and an upper section which are detachably connected.
4. A system as claimed in claim 3, wherein: the lower end of the lower section of the vertical beam of the F-shaped bracket is vertically connected with a horizontal stay bar extending to the building body, and the tail end of the horizontal stay bar is connected with a supporting roller capable of rolling up and down along the building body.
5. The system according to claim 2, wherein: aiming at pier column construction with an inner cavity, a detachable anti-falling anti-wind pull rod is arranged between the F-shaped bracket and the inner and outer templates; and a detachable anti-falling and wind-resistant pull rod is arranged between the F-shaped bracket and the outer template for pier stud construction without an inner cavity.
6. The system according to claim 5, wherein: the jacking device is a through cylinder, the piston rod and the cylinder sleeve of the jacking device are respectively provided with an axial center hole, and clamping devices are respectively fixed on the bottom surface of the cylinder sleeve and the top surface of the piston rod corresponding to the axial center holes.
7. The system of claim 6, wherein: the climbing pole is any one of a round pipe, a round rod, a square pipe or square steel, the upper end of the climbing pole penetrates through the lower cross beam of the F-shaped support, the jacking device is sleeved on the climbing pole in a penetrating mode, the climbing pole is clamped through the clamping device, and the bottom surface of the jacking device and the lower cross beam are fixed into a whole.
8. The system as recited in claim 4, wherein: the bottoms of the inner mold platform bracket and the outer mold platform bracket are respectively connected with a suspension type platform bracket, and reversible walking platforms are arranged on the inner mold platform bracket, the outer mold platform bracket and the suspension type platform bracket corresponding to each pouring section.
9. A method of constructing an intracavity bridge pier using the system of claim 1 comprising the steps of:
(1) Pouring construction of the bottom pier, and embedding two groups of climbing poles according to the set positions;
(2) Fixing each climbing bracket on each group of climbing rods through a jacking device, and enabling the telescopic rods of each jacking device to be in a contracted and in-place state;
(3) Respectively fixing the inner die platform bracket and the outer die platform bracket with the climbing bracket, and adjusting elevation of the two platform brackets;
(4) The inner die platform bracket and the outer die platform bracket are respectively connected and fixed with the inner die plate and the outer die plate through anti-falling and anti-wind pull rods;
(5) Binding the steel bars of the section to be poured;
(6) Dismantling an anti-falling anti-wind pull rod;
(7) Removing slag from the lowest layer of templates, and then hoisting the layer of templates to the bound steel bar segments by a hoisting device on each climbing bracket;
(8) The elevation of the inner template and the elevation of the outer template are adjusted, the inner template and the outer template are fixed, the anti-falling anti-wind pull rod is connected, and the walking platform covers the template lifting channel;
(9) Pouring the segment and curing;
(10) Disassembling an anti-falling anti-wind pull rod, and overturning and opening the walking platform upwards;
(11) Enabling each jacking device to carry the inner die platform bracket and the outer die platform bracket to climb upwards along the climbing rod at the same time to form a section to be poured;
(12) Repeating the steps (4) - (11) until the casting of the last segment is completed.
10. The method of claim 9, wherein: a first sensor for measuring the total single climbing displacement is arranged on the climbing bracket, and a second sensor for measuring the single stroke of the jacking device is arranged on the jacking device;
in the step (2), the current value of the second sensor is recorded when the telescopic rod of each jacking device is retracted and used as the zero value of the second sensor of the jacking device, and the current stroke value S of the corresponding jacking device is obtained by subtracting the zero value of the sensor from the real-time value of the second sensor in the running process of the jacking device;
zero value calibration is carried out on the second sensor before each climbing of the jacking device;
in step (11), the minimum value S of the single stroke of the jacking device is determined according to the value measured by the second sensor min Determining a maximum value H of the total displacement of the single climb by means of the value measured by the first sensor max And a minimum value H min Will minimum value S min Sequentially comparing the current stroke value S of each jacking device detected by the second sensor with the current stroke value S of each jacking device to obtain the current stroke value S of each jacking device and the minimum value S of single stroke of the jacking device min The processing procedure after the difference of (2) is as follows:
(11.1) synchronization of climbing procedure
If one or more of the difference values is greater than the preset value 1, the jacking devices with larger difference values are sequentially stopped, and when the current stroke value S of the jacking devices is equal to the minimum value S of a single stroke of the jacking devices min When the difference value of (2) is smaller than the preset value, starting the jacking devices until synchronously lifting one to be detectedCasting the height of the section;
(11.2) determining whether it has arrived
Setting an upper deviation and a lower deviation of the total travel, wherein the difference value of the upper deviation and the lower deviation is larger than the difference value of the maximum value and the minimum value in synchronous adjustment;
comparing the minimum value H of the total displacement of single climbing min The lower deviation from the setting range of the total travel is used for obtaining the minimum value H of the total displacement of single climbing min The difference value of the deviation from the total stroke setting is greater than 0, and if the difference value is greater than 0, the total stroke is completed;
(11.3) leveling
When the difference between the maximum value and the minimum value of the total climbing height of the jacking device is larger than the difference between the upper deviation and the lower deviation of the total travel setting, the jacking device with smaller total climbing height is started until the difference between the maximum value and the minimum value of the total climbing height of the jacking device is smaller than the difference between the upper deviation and the lower deviation of the total travel setting, namely leveling.
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| CN111206506B (en) * | 2020-01-20 | 2021-05-25 | 四川路航建设工程有限责任公司 | Construction method of bridge pier column |
| CN111705662B (en) * | 2020-05-22 | 2022-03-25 | 中建三局集团有限公司 | Deformable frame suitable for inclined structure construction |
| CN113417213A (en) * | 2021-06-28 | 2021-09-21 | 中交路桥建设有限公司 | Integral truss type pull-rod-free turnover formwork system and turnover construction method |
| CN114717950B (en) * | 2022-03-17 | 2024-04-12 | 中交武汉港湾工程设计研究院有限公司 | Intelligent pier making machine and construction method |
| CN115369748B (en) * | 2022-09-19 | 2024-06-04 | 中交一公局第七工程有限公司 | Construction method of formwork system for integrally pouring bridge pier and tie beam |
| CN118004904B (en) * | 2024-04-08 | 2024-06-25 | 中铁三局集团有限公司 | Hoisting type construction work platform |
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