CN112502047A - Method for erecting simply supported PC track beam and linear debugging device - Google Patents

Method for erecting simply supported PC track beam and linear debugging device Download PDF

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Publication number
CN112502047A
CN112502047A CN202011383089.6A CN202011383089A CN112502047A CN 112502047 A CN112502047 A CN 112502047A CN 202011383089 A CN202011383089 A CN 202011383089A CN 112502047 A CN112502047 A CN 112502047A
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China
Prior art keywords
track beam
track
adjusting
design
line
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CN202011383089.6A
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Chinese (zh)
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CN112502047B (en
Inventor
吴宇
焦国臣
张燕
刘涛
秦环兵
洪兴国
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China Railway Major Bridge Engineering Group Co Ltd MBEC
2nd Engineering Co Ltd of MBEC
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China Railway Major Bridge Engineering Group Co Ltd MBEC
2nd Engineering Co Ltd of MBEC
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Publication of CN112502047A publication Critical patent/CN112502047A/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B25/00Tracks for special kinds of railways
    • E01B25/08Tracks for mono-rails with centre of gravity of vehicle above the load-bearing rail
    • E01B25/10Mono-rails; Auxiliary balancing rails; Supports or connections for rails
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete

Abstract

The application relates to a method for simply supporting a PC track beam erection and a linear debugging device, wherein the method comprises the following steps: determining a longitudinal design axis, a transverse design axis and a design side line on a bearing platform; placing a support mechanism according to the designed axis, and dropping the PC track beam on the support mechanism; connecting the PC track beams falling from the beam by using a stabilizing mechanism, and installing a three-way adjusting mechanism on a bearing platform; and adjusting the PC track beam by using a three-way adjusting mechanism according to the design axis, the transverse design axis and the design sideline. According to the method, the stabilizing mechanism, the supporting mechanism and the three-way adjusting mechanism are matched for use, so that when the PC track beam is adjusted, the stabilizing mechanism and the supporting mechanism can ensure that the PC track beam cannot shake, and the safety is high; compared with large mechanical equipment, the structure of the device is simple and easy to manufacture, and the device can be matched with multidirectional movement of a three-way adjusting mechanism and adjusting steps based on a longitudinal design axis, a transverse design axis and a design sideline, so that timely feedback can be obtained during adjustment, and repeated debugging is not needed.

Description

Method for erecting simply supported PC track beam and linear debugging device
Technical Field
The application relates to the technical field of PC track beam construction, in particular to a debugging device and a debugging method for simply supported PC track beam erection.
Background
With the gradual acceleration of the urban construction pace, the defects of the traditional traffic mode are obvious, the problems of traffic jam, environmental pollution, noise pollution and the like are caused, and the development of cities is seriously hindered; the application of the light straddle type monorail transit provides a brand new possibility for the modern traffic development; the straddle type single rail has the characteristics of attractive appearance, environmental protection, strong adaptability, low noise, small turning radius, very strong climbing capacity, fastest speed of 80 kilometers, one third of the manufacturing cost of a subway, and high efficiency, accuracy and economy which are widely favored by three-four-wire cities.
The simple PC (Precast Concrete) track beam is used as a light straddle type monorail track, the surface of the beam is a running surface, and the requirements on the precision and the linear type of the beam body are extremely high in order to ensure the travelling comfort of a vehicle; linear fine adjustment is needed before the erected simple PC track beam is poured at a post-pouring section, particularly the perpendicularity, center line offset, elevation offset and the like of the simple PC track beam cannot be adjusted again after pouring; how to finish the erection and debugging work of the PC track beam with high precision and high quality becomes one of the technical difficulties of straddle type monorail transit.
However, in some related technologies, when a simple PC track beam is erected, a large machine (such as a crane) is generally used to move the PC track beam, but the large machine has a high operation difficulty and a low moving accuracy, so that a great error exists between an actual erection position and a design position of the PC track beam, and finally the whole erected PC track beam line does not conform to a design line; and the problems of high safety and high cost of the large-scale machine in use also need to be solved.
In other related technologies, most of methods for adjusting erection of the PC track beam are complicated in steps, and the adjustment sequence of perpendicularity, centerline offset, elevation offset and the like of the PC track beam in actual erection is unreasonable, so that effective adjustment is difficult to perform, the position of the PC track beam needs to be adjusted repeatedly, construction difficulty is increased, and the construction period is prolonged; and when the PC track beam is adjusted in a moving mode, only a single PC track beam is adjusted, and the whole line is difficult to adjust in place at one time.
Disclosure of Invention
The embodiment of the application provides a method for erecting a simply supported PC track beam and a linear debugging device, and aims to solve the problems that large machines in the related art are difficult to operate and accurately move and are low in safety during erection.
In a first aspect, a linear adjusting device for simply supporting a PC track beam is provided, which includes at least two linear adjusting structures, where the linear adjusting structures include:
the two length-adjustable supporting mechanisms are distributed at intervals along the transverse bridge direction, the bottom ends of the supporting mechanisms are used for being assembled on the bearing platform, and the top ends of the supporting mechanisms are used for supporting the PC track beam;
the stabilizing mechanism comprises a stabilizing frame, a groove body matched with the top of the PC track beam is arranged at the bottom of the stabilizing frame, the stabilizing frame is arranged on the PC track beam through the groove body, both ends of the stabilizing frame are connected with connecting pieces with adjustable tightness, and one ends of the connecting pieces far away from the stabilizing frame are used for being connected with a bearing platform;
and the three-way adjusting mechanism is used for being assembled on the bearing platform and adjusting the PC track beam along the transverse bridge direction, the longitudinal bridge direction and the elevation direction.
In some embodiments, the connecting piece comprises a connecting rope and a turn buckle, the turn buckle is embedded in the bearing platform, one end of the connecting rope is connected with the stabilizing frame, and the other end of the connecting rope is connected with the turn buckle; and/or the presence of a gas in the gas,
the supporting mechanism comprises a sand cylinder and a plurality of gaskets, and the sand cylinder is used for bearing the PC track beam; the gasket is arranged at the top of the sand cylinder; and/or the presence of a gas in the gas,
the three-way adjusting mechanism adopts a three-way jack.
In a second aspect, a method for erecting a simply supported PC track beam is provided, which includes the following steps:
providing at least two linear adjusting devices for simply supporting the PC track beam;
determining a longitudinal design axis and a transverse design axis of each bearing platform and design side lines of side lines on two sides of a transverse bridge of the PC track beam, wherein the design side lines are positioned on the bearing platforms;
assembling the support mechanism on the bearing platform, and dropping the PC track beam on the support mechanism;
installing the stabilizing mechanism and the three-way adjusting mechanism;
and adjusting the line type of the line formed by the PC track beam by utilizing the supporting mechanism, the stabilizing mechanism and the three-way adjusting mechanism according to the longitudinal design axis, the transverse design axis and the design sideline.
In some embodiments, adjusting the linear shape of the PC track beam using the support mechanism, the stabilizing mechanism, and the three-way adjustment mechanism according to the longitudinal design axis, the lateral design axis, and the design edge line comprises:
adjusting the beam end gap of two adjacent PC track beams;
adjusting the verticality of the PC track beam;
adjusting the line center line of the PC track beam;
adjusting the horizontal line-type rise and the vertical line-type rise of the beam end connection part of two adjacent PC track beams;
and adjusting the absolute elevation of the rail surface at the beam end of the PC rail.
In some embodiments, adjusting the beam-end gap between two adjacent PC rail beams comprises:
and adjusting the tightness of the connecting piece, and moving the PC track beam along the longitudinal bridge direction by using the three-way adjusting mechanism so that the distance between the beam end of the PC track beam and the transverse design axis of the bearing platform on the side of the beam end reaches a first set value.
In some embodiments, adjusting the perpendicularity of the PC rail beam comprises:
line pendants are arranged on two side lines of the PC track beam in the transverse bridge direction;
and adjusting the tightness of the connecting piece and the length of the supporting mechanism so as to enable the projections of the two line pendants on the bearing platform to be respectively positioned on the two design side lines.
In some embodiments, adjusting the line centerline of the PC track beam comprises the steps of:
a line pendant is arranged at the center of the transverse bridge direction at the two ends of the PC track beam;
adjusting the tightness of the connecting piece, and moving the PC track beam along the transverse bridge direction by using the three-way adjusting mechanism so as to enable the projections of the two line weights on the bearing platform to be positioned on the longitudinal design axis.
In some embodiments, adjusting the horizontal line-shaped rise and the vertical line-shaped rise of the beam-end connection of two adjacent PC track beams comprises the following steps:
adjusting the tightness of the connecting piece, and moving the beam end of the PC track beam along the transverse bridge direction by using the three-way adjusting mechanism to enable the horizontal line-type rise at the joint of the beam end of the PC track beam to reach a second design value;
and adjusting the tightness of the connecting piece, and moving the beam end of the PC track beam along the elevation direction by using the three-way adjusting mechanism to enable the vertical line-type rise of the joint of the beam end of the PC track beam to reach a third design value.
In some embodiments, adjusting the absolute elevation of the PC rail beam end rail face comprises:
adjust the elasticity of connecting piece, and utilize three-dimensional adjustment mechanism removes along the elevation direction PC track roof beam line beam-ends makes the absolute elevation of PC track roof beam line beam-ends rail surface reaches the fourth design value.
In some embodiments, determining a longitudinal design axis and a transverse design axis of each of the caps, and a design edge line of edge lines on both sides of the PC rail beam crossbridge, the design edge lines being located on the caps, comprises the steps of:
obtaining a longitudinal design axis of the bearing platform according to the design center coordinate of the bearing platform, the included angle of the designed PC track beam line advancing direction and the total station;
making a perpendicular line between the design center of the bearing platform and the longitudinal design axis to obtain a transverse design axis;
and obtaining design sidelines which are symmetrical on two sides of the longitudinal design axis on the bearing platform according to the beam width of the PC track beam.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a simple PC track beam erection method and a linear debugging device, because of the use of two length-adjustable supporting mechanisms and stabilizing mechanisms, the supporting mechanisms support the PC track beam on a bearing platform, and the stabilizing frames and the tightness-adjustable connecting pieces of the stabilizing mechanisms enable the PC track beam to be stably arranged on the bearing platform, so that the PC track beam is prevented from shaking and overturning, and the safety is enhanced; and the three-way adjusting mechanism moves the PC track beam in multiple directions along the transverse bridge direction, the longitudinal bridge direction and the elevation direction, so that the PC track beam can be accurately moved, and the whole device has a simple structure, thereby improving the accuracy and the safety of erecting the PC track beam.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a linear debugging apparatus for simple support PC track beam erection according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1 according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a support mechanism provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a three-way adjusting mechanism provided in an embodiment of the present application;
fig. 5 is a flowchart of an erection method of a simple PC track beam according to an embodiment of the present application.
In the figure: 1. a support mechanism; 10. a sand cylinder; 101. an upper base plate; 102. the upper part of the sand cylinder body; 103. a block of C20 concrete; 104. a lower base plate; 105. the lower part of the sand cylinder body; 106. fine sand; 107. a sand cylinder screw; 11. a gasket; 2. a stabilizing mechanism; 20. a stabilizer frame; 201. connecting lugs; 21. a connecting member; 211. connecting ropes; 212. a turn buckle; 3. a three-way adjusting mechanism; 30. a three-way jack; 301. longitudinally moving a jack; 302. transversely moving the jack; 303. a jacking jack; 31. a base plate; 32. supporting a tool; 4. a PC track beam; 5. a bearing platform; 51. a bracket; 52. a cushion stone; 6. and (4) the ground.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a line type adjusting device for simply supporting a PC track beam, which can solve the problems that the device structure is complex, the PC track beam is difficult to accurately move and operate and the safety is low when the PC track beam is erected in the related technology.
Referring to fig. 1 and 2, a linear adjusting device for erecting a simple PC track beam includes at least two linear adjusting structures, each of which includes two length-adjustable supporting mechanisms 1, a stabilizing mechanism 2 and a three-way adjusting mechanism 3.
Two adjustable length supporting mechanism 1, it is along horizontal bridge to interval distribution, and two 1 bottom of supporting mechanism are used for the group to locate on the cushion cap 5 that is located ground 6, and the top is used for the roof beam end of shore PC track roof beam 4, and adjustable length supporting mechanism 1 sets up and supports PC track roof beam 4 temporarily on cushion cap 5.
Stabilizing mean 2, it includes steady rest 20, steady rest 20 bottom is equipped with the cell body with 4 top adaptations of PC track roof beam, the cell body can stably combine with PC track roof beam 4, steady rest 20 is used for locating on PC track roof beam 4 through the cell body group, the both ends of steady rest 20 all are connected with elasticity adjustable connecting piece 21, the one end that stabilizing rest 20 was kept away from to connecting piece 21 is used for connecting cushion cap 5, make connecting piece 21 be in the state of straining and can exert the pulling force to cushion cap 5 to steady rest 20 be connected with PC track roof beam 4, make PC track roof beam 4 be difficult to rock.
The three-way adjusting mechanism 3 is assembled on the bearing platform 5 and is positioned between the cushion stones 52 of the bearing platform 5; and is used to move and adjust the position of the PC track beam 4 in the lateral, longitudinal, and elevation directions.
Through the arrangement of the structure, when the PC track beam 4 is erected, the PC track beam 4 falls on the supporting mechanism 1, the linear adjusting structures are arranged on the bearing platforms at the two ends of the PC track beam 4, the stabilizing frames 20 in the linear adjusting structures are arranged at the two ends of the PC track beam 4, and the stabilizing frames 20 and the connecting pieces 21 connected with the stabilizing frames 20 are gradually adjusted to be in a tight state, so that the stabilizing frames 20 and the connecting pieces 21 at the two ends form a stable triangular structure, the two ends of the PC track beam 4 are fixed, the PC track beam 4 is prevented from shaking, and the phenomenon that the PC track beam 4 topples during erection and safety accidents occur is avoided; in addition, when the PC track beam 4 is adjusted, the three-way adjusting mechanism 3 moves the PC track beam 4 along the transverse bridge direction, the longitudinal bridge direction and the elevation direction, the multi-way adjustment achieves accurate movement, the connecting piece 21 is in a loose state during movement, and the connecting piece 21 is adjusted to be in an immediately tight state after adjustment is finished, so that the purpose of accurate and safe adjustment is achieved.
Referring to fig. 1 to 4, in some preferred embodiments, the connection member 21 includes a connection rope 211 and a turn buckle 212, the turn buckle 212 is pre-embedded on the platform 5, one end of the connection rope 211 is connected to the stabilizing frame 20, the other end of the connection rope 211 is connected to the turn buckle 212, the tightening and loosening of the connection rope 211 is achieved by rotating the turn buckle 212, the turn buckle 212 is a structure commonly used in the related art, which is extended and contracted by a lead screw, and the tightness of the connection rope 211 can be adjusted, wherein the connection rope 211 is a steel wire rope; the two ends of the stabilizer 20 are provided with connecting lugs 201, and the connecting lugs 201 are convenient to be connected with connecting ropes 211.
In some preferred embodiments, as shown in fig. 1, 2 and 3, the support mechanism 1 comprises a sand cylinder 10 and a plurality of gaskets 11, the sand cylinder 10 being used for carrying the PC rail beam 4; the gaskets 11 are arranged at the top of the sand cylinder 10, the thickness of each gasket is not more than 2mm, and the actual working height of the sand cylinder 10 can be increased by properly adding the number of the gaskets 11 so as to bear different PC track beams 4; wherein the sand section of thick bamboo 10's concrete structure does:
the upper backing plate 101 and the lower backing plate 104 are steel plates, the upper backing plate 101 and the lower backing plate 104 are respectively in full welding with the upper sand barrel body 102 and the lower sand barrel body 105, centering needs to be paid attention during welding, and instability caused by eccentric compression after girder erection is prevented; c20 concrete 103 is filled in the upper sand cylinder body 102, and a proper amount of screened and dried fine sand 106 is filled in the lower sand cylinder body 105; a screw hole is formed in the lower sand cylinder body 105, and a sand cylinder screw 107 with the specification of M24 is mounted on the screw hole; the upper sand cylinder body 102 and the lower sand cylinder body 105 are combined together to form the piston type adjustable sand cylinder 10, and the length of the sand cylinder can be shortened by pulling a sand cylinder screw 107 out to discharge fine sand 106.
In some preferred embodiments, as shown in fig. 4, the three-way adjusting mechanism 3 is a three-way jack, which is a common device in the related art, and comprises a lower sliding seat assembly, an upper sliding seat assembly, a jacking jack 303, a longitudinally moving jack 301, a transversely moving jack 302, a manual pump, an ultrahigh pressure rubber tube, and the like, wherein the bearing capacity is 100t, and the three-way adjusting mechanism further comprises a hydraulic precision adjusting system, and the hydraulic precision adjusting system can be controlled electrically or manually, can be well adapted to the operation without a power supply, and has higher working efficiency;
in addition, in order to ensure that the working stroke of the three-way jack can be stably contacted with the PC track beam 4, the bottom of the three-way jack is provided with a supporting tool 32, the supporting tool 32 lifts the three-way jack to change the height of the three-way jack, and the situation that the PC track beam 4 cannot be moved to the designed height in the elevation direction of the three-way jack due to the limitation of the working stroke of the three-way jack is avoided; the top of the base plate 31 is provided with the base plate 31, and the base plate 31 can increase the contact area between the three-way jack and the PC track beam 4 and ensure the perpendicularity of the beam body in the process of debugging the PC track beam 4; but also can increase the friction force of the contact surface.
Referring to fig. 1-5, a method for erecting a simple PC track beam includes the following steps:
providing and using the supporting mechanism 1, the stabilizing mechanism 2 and the three-way adjusting mechanism 3 in the linear adjusting device for simply supporting the PC track beam;
determining a longitudinal design axis and a transverse design axis of each bearing platform 5 and design side lines of side lines on two sides of a transverse bridge of the PC track beam 4, wherein the design side lines are positioned on the bearing platforms 5, and the accuracy is improved in order to determine the basis for linear adjustment movement of the three-way adjusting mechanism 3;
assembling the two support mechanisms 1 on a bearing platform 5, dropping the PC track beam 4 on the support mechanisms 1, and temporarily supporting the PC track beam 4;
a three-way adjusting mechanism 3 and a stabilizing mechanism 2 are arranged on the bearing platform, and the stabilizing mechanism 2 is connected with two ends of a PC track beam 4;
according to the longitudinal design axis, the transverse design axis and the design sideline, the line type of the line formed by the PC track beam 4 is adjusted by the supporting mechanism 1, the stabilizing mechanism 2 and the three-way adjusting mechanism 3.
Erecting the PC track beam 4 along a certain direction by a linear adjusting device in cooperation with the steps to form an uplink line and a downlink line; the stability is strong when setting up, and there is definite adjustment basis and order when carrying out the line type adjustment, make PC track roof beam 4 erect the accuracy height, convenient to set up, wherein because PC track roof beam 4 carries out the simple support and sets up, and then form the track circuit, therefore the minimum unit of adjustment is two adjacent PC track roof beam 4's beam-ends junction and three bearing platforms 5 adjacent two PC track roof beams 4 on the same bearing platform, carry out according to the track of same circuit and upper and lower row with minimum unit.
In some preferred embodiments, since the adjustment basis needs to be determined according to the central longitudinal and transverse line on the platform, but there is a certain error between the actual platform 5 and the designed platform, it needs to be re-determined, and the longitudinal design axis and the transverse design axis of each platform 5, and the design edge line of the lateral bridge of the PC track beam 4 need to be re-determined, which includes the following specific steps:
according to the design center coordinate of the bearing platform 5 and the included angle from the due north direction to the forward direction of the PC track beam line clockwise, the longitudinal design axis of the bearing platform 5 can be released by combining and utilizing a total station;
making a perpendicular line between the design center of the bearing platform 5 and the longitudinal design axis to obtain a transverse design axis;
according to the beam width of the PC track beams 4, design side lines symmetrical on two sides of a longitudinal design axis are obtained on the bearing platform 5, the design side lines are intersected and perpendicular to a transverse design axis, and then according to the designed beam gap value between the adjacent PC track beams 4, the design side lines extend to the bracket 51 of the bearing platform 5, and the position is the optimal position for placing the supporting mechanism 1.
In some preferred embodiments, assembling two support mechanisms 1 on the platform 5, and dropping the PC rail beam 4 on the support mechanisms 1, temporarily supporting the PC rail beam 4, includes the following specific operations:
the manufactured sand cylinders 10 are horizontally placed on the corbels 51 of the bearing platform, two sand cylinders 10 are symmetrically placed on the corbels 51 of the unilateral bearing platform 5, each PC track beam 4 corresponds to four sand cylinders 10, and during placement, the sand cylinder screws 107 are required to face the outer side of the beam body to facilitate later-period dismantling and discharge internal fine sand 106.
In some preferred embodiments, a three-way adjustment mechanism 3 and a stabilization mechanism 2 are provided on the platform and the stabilization mechanism 2 is connected to both ends of the PC track beam 4, which includes the following specific requirements:
when the PC track beam 4 is erected, an erection route and an operation field for entering and exiting a beam erecting area are determined in advance, and special hoisting tools capable of preventing the PC track beam from being damaged are required to be provided, such as an automobile crane and a beam transporting vehicle, when the automobile crane and the beam transporting vehicle are in place according to a designed working condition, hoisting points are bound by using a hoisting tool, and a lifting beam begins to fall to a preset position; the beam should be slowly and stably dropped, the beam should be kept horizontally and dropped on the sand cylinder 10, the four points of the two ends of the PC track beam contacting with the sand cylinder 10 should be uniformly stressed, and the condition of three-point stress cannot occur
In some preferred embodiments, the line type of the line formed by the PC track beam 4 is adjusted by the support mechanism 1, the stabilizing mechanism 2 and the three-way adjusting mechanism 3 according to the longitudinal design axis, the transverse design axis and the design sideline, including the following specific steps:
sequence of line type debugging:
adjusting the beam end gap of two adjacent PC track beams 4;
adjusting the verticality of the PC track beam 4;
adjusting the line central line of the PC track beam 4;
adjusting the horizontal line-type rise and the vertical line-type rise at the beam end connection part of two adjacent PC track beams 4;
and adjusting the absolute elevation of the rail surface at the beam end of the PC track beam 4.
Retesting the debugged line type, then pouring in the next procedure, and removing the sand cylinder 10, the three-way adjusting mechanism 3 and the stabilizing mechanism 2 after pouring;
the beam seam, the verticality, the elevation, the smoothness of a connection part and the like of the PC track beam 4 line are sequentially adjusted in the sequence of the steps, and the adjustment is started from one end of the same line to the other end, so that the adjustment can be completed at one time without repeated adjustment, and the construction time is saved; in addition, the raw materials required by the method mainly comprise steel plates, steel wire ropes and concrete, the raw materials are simple and easy to obtain and manufacture, the cost is low, the manufacturing process of the sand cylinder 10 and the stabilizing mechanism is simple, the production difficulty is low, the sand cylinder 10 and the stabilizing mechanism can be completed only by inputting a small amount of manpower and material resources, the economy is good, meanwhile, the sand cylinder 10 and the stabilizing mechanism can be detached and recycled after the construction of the post-pouring section of the track beam is completed, a large amount of turnover materials are not required to be consumed, and the national energy-saving and environment-friendly production idea is met.
In some preferred embodiments, since the beam-end gap between two adjacent PC rail beams 4 is to be ensured, which is convenient for connection, the PC rail beams 4 are moved longitudinally during adjustment, and the specific steps of adjusting the beam-end gap between two adjacent PC rail beams 4 are as follows:
adjusting the tightness of the connecting piece 21 to enable the PC track beam 4 to be moved by the three-way adjusting mechanism, and moving the PC track beam 4 along the longitudinal bridge direction by using the three-way adjusting mechanism 3 to enable the distance between the beam end of the PC track beam 4 and the transverse design axis of the bearing platform 5 on the side where the beam end is located to reach a first set value; the first set value is a beam gap value of two adjacent PC track beams 4 in design, a line weight is arranged at the beam end of the PC track beam 4 and is adjusted by utilizing the distance value between the position of the line weight projected on the bearing platform 5 and a transverse design axis, the error of the beam gap value of the two adjacent PC track beams 4 in design is +/-10 mm, the error is an adjustment precision error, and the actual beam gap value can be within the error range.
In some preferred embodiments, because the sand cylinders 10 have certain errors during manufacturing, the lengths of the sand cylinders 10 are different, so that the PC track beam 4 erected thereon is unevenly stressed and inclined left and right, the perpendicularity and the cross slope ultrahigh value of the PC track beam 4 are affected, and adjustment is needed, however, once the perpendicularity of the PC track beam 4 is determined, the cross slope ultrahigh value is also determined, so that the perpendicularity of the PC track beam 4 can be adjusted, and the perpendicularity of the PC track beam 4 only needs to ensure that the two sides of the PC track beam are uniformly vertical to the bearing platform, and the projections of the two sides are at the designed positions, and the specific steps are as follows:
arranging line pendants on two side lines of the PC track beam 4 in the transverse bridge direction, and judging whether projections of the line pendants are positioned on the two designed side lines or not, wherein the projections of the line pendants are positioned on the side lines, and the projection positions can be judged to be positioned on the side lines only by meeting the set precision error level;
if the vertical angle of the PC track beam 4 is positioned on the two design side lines, the verticality of the PC track beam does not need to be adjusted; otherwise, the connecting piece 21 is adjusted to enable the connecting rope 211 to be in a loose state, and the PC track beam 4 is lifted up by using the three-way adjusting mechanism, so that the projections of the two lines falling on the bearing platform 5 are respectively positioned on the two design side lines; then adding a proper gasket 11 according to the distance between the jacked PC track beam 4 and the top of the sand cylinder 10, and finally enabling the sand cylinder 10 to be in uniform contact with the PC track beam 4; wherein the allowable error of the adjustment should not be greater than (perpendicularity) 7/1000 rad; the difference in height between the joint plates at the ends of adjacent PC track beams 4 should be less than 2 mm.
In some preferred embodiments, in order to ensure that the distance between the uplink and downlink lines of the PC track beam 4 is within the error of the set value, and the PC track beam 4 is located on the designed line central line, and ensure that the joints of the two ends of two adjacent PC track beams 4 are not dislocated, adjustment needs to be performed according to the longitudinal design axis; in addition, as long as the line type of the uplink of the PC track beam 4 and the downlink of the PC track beam 4 are both equal to the design value, the distance between the uplink and the downlink is correspondingly equal, and only the line center line of the PC track beam 4 needs to be adjusted, so as to ensure that the line type of the adjacent PC track beam 4 is consistent with the designed line type, the method comprises the following steps:
the line weight is arranged at the center of the transverse bridge direction at the two ends of the PC track beam 4, the tightness of the connecting piece 21 is adjusted, the connecting rope 211 is in a loose state, and the PC track beam 4 can be moved;
the three-way adjusting mechanism 3 moves the PC track beam 4 along the transverse bridge direction to enable the projections of two lines at two ends of the PC track beam 4, which are dropped on the bearing platform 5, to be positioned on the longitudinal design axis, namely, the line central line of the PC track beam 4 is proved to be parallel to the longitudinal design axis, and the adjustment is completed; judging whether the projections of the two line pendants on the bearing platform 5 are positioned on the longitudinal design axis, if so, within the precision error;
the central line of the PC track beam 4 is the longitudinal central line of the PC track beam 4, and the distance between the uplink and downlink lines is the distance between the midpoints of two corresponding PC track beams 4 in the uplink and downlink lines, so as to ensure that the uplink railway vehicles do not collide with each other because the distance between the two corresponding PC track beams does not meet the design requirement.
In some preferred embodiments, in order to ensure the smoothness of the joint of the PC track beam 4, the phenomenon of slab staggering does not occur after the installation of the finger-shaped plates, so that the smoothness and comfort of the later-stage traveling are ensured, and the steps of adjusting the end gap of the PC track beam 4, the verticality of the PC track beam 4 and the line center line of the PC track beam 4 are supplemented; in addition, the track line formed by the PC track beam 4 has an application form of ascending, descending and flattening, the vertical line rise of the horizontal line shape at the beam end connection part needs to be adjusted, and the concrete steps are as follows:
adjusting the tightness of the connecting piece 21, and moving the beam end of the PC track beam 4 along the transverse bridge direction by using the three-way adjusting mechanism 3 to enable the horizontal line type rise of the joint of the beam end of the PC track beam 4 to reach a second design value, wherein the second design value is a design value on a construction drawing, the horizontal line type rise is a flat curve, and the following conditions are adopted during adjustment:
the rise error of the curved PC track beam at a chord length of 20m is +/-20 mm (adjustment of the joint of the two curved PC track beams)
The rise error of the straight PC track beam at the chord length of 4m is +/-5 mm (adjustment of the joint of the two straight PC track beams).
The elasticity of adjusting connection piece 21 to and utilize three-dimensional adjustment mechanism 3 to remove 4 beam ends of PC track roof beam along the elevation direction, make the vertical line type rise of 4 beam ends of PC track roof beam junctions reach the third design value, and add suitable gasket 11 on sand section of thick bamboo 10, guarantee that the atress is even and above straightness etc. that hangs down can not change, wherein the third design value is the design numerical value on the construction drawing, vertical line type rise is vertical curve, be following several kinds of condition when adjusting:
the rise error of the linear and curved PC track beams at a chord length of 4m should be less than 5mm (adjustment of the joint of the linear and curved PC track beams)
The rise error of the variable slope point of the straight line and the curve PC track beam at the chord length of 4m is less than 5mm +/-H, and the H value is the concave-convex vertical increase and decrease of the variable slope point of the track surface.
In some preferred embodiments, the absolute elevation refers to a height of a building elevation relative to a national yellow sea elevation, in order to enable the whole PC track beam line to satisfy a fourth design value, the absolute elevation of the rail surface at the end of the track beam line needs to be adjusted, the whole PC track beam line is adjusted during the adjustment, the whole PC track beam line moves in the elevation direction, and therefore the gap between the ends of the PC track beam 4, the verticality of the PC track beam 4, the line center line of the PC track beam 4 and the like which are adjusted in place in front cannot be changed, and the specific steps are as follows:
installing a measuring frame at the designated position of the beam end of the PC track beam 4, measuring the three-dimensional coordinate value of a reflecting prism on each frame by using a total station, comparing the measurement result with a fourth design value to obtain an adjustment value of a measuring point, and informing an operator of the adjustment value;
adjusting the tightness of the connecting piece 21, moving the line beam end of the PC track beam 4 along the elevation direction by using the three-way adjusting mechanism 3 to enable the absolute elevation of the rail surface of the line beam end of the PC track beam 4 to reach a fourth design value, adding a proper gasket 11 on the sand cylinder 10 to ensure that the absolute elevation of the rail surface of the beam end reaches the design value, and adjusting the elevation value of the rail surface of the beam end to the accuracy that the error between the absolute elevation value and the fourth design value is-15 mm- +30 mm.
In the specific step of adjusting the line type of the PC track beam 4, a certain precision error is reserved in each step of adjusting the gap of the end of the PC track beam 4, the verticality of the PC track beam 4 and the line central line of the PC track beam 4, if the debugging precision of the beam end gap meets the design value of +/-10 mm, the beam end gaps in the upper direction, the lower direction, the front direction and the rear direction are possibly different after the debugging of the step is finished, and the precision error is that the line type rise is adjusted in the later period and a margin is reserved for moving the beam end; similarly, the perpendicularity of the PC rail beam 4 and the line center line of the PC rail beam 4 are adjusted.
Therefore, the line-type rise adjustment of the PC track beam 4 is a correction to the previous adjustment step, and is also an essential link in the line-type adjustment process of the PC track beam 4, thereby ensuring the roundness of the joint of the PC track beam 4; in actual operation, if the debugging precision of three steps before the line-type rise of the PC track beam 4 is adjusted is just met, and the debugging precision of the next step or even two steps, the corresponding step can be skipped without repeated debugging, so that the complicated steps of line-type debugging are reduced, the accuracy is ensured, and the actual construction is met.
In some preferred embodiments, after the above-mentioned line type debugging is finished, retesting is performed, and the specific steps are as follows:
the flatness and the flatness of the top surface and the side surface of the finger-shaped plate seats at the joint of the track beam are detected by adopting a horizontal guiding rule, the center of the horizontal rule is placed at the joint of the track beam, and then the flatness measurement value at the position is the designed linear rise (not considered when a straight line is formed) within the range of subtracting the length of the horizontal rule from the measured value, and the precision is within 2 mm;
the elevation is rechecked and measured by a level gauge; the level can adopt a height difference method and an equal height method to measure and calculate,
height difference method: the known elevation plus the height difference is the elevation to be measured; -front-view number-rear-vision reading;
the equal height method comprises the following steps: known elevation + known elevation point reading ═ H; h, reading of the point to be measured is equal to the elevation to be measured.
The verticality is detected by adopting the plummet, and the longitudinal design axis, the transverse design axis and the design side line of the bearing platform 5 are compared by adopting the plummet according to the mode.
The working principle of the application is as follows:
(1) when the PC track beam 4 is erected, the PC track beam 4 falls on the supporting mechanism 1, linear adjusting structures are respectively arranged on bearing platforms at two ends of the PC track beam 4, stabilizing frames 20 in the linear adjusting structures are arranged at two ends of the PC track beam 4, and the stabilizing frames 20 and connecting pieces 21 connected with the stabilizing frames 20 are gradually adjusted to be in a tight state, so that the stabilizing frames 20 and the connecting pieces 21 at the two ends form a stable triangular structure, the two ends of the PC track beam 4 are fixed, the PC track beam 4 is prevented from shaking, and overturning and safety accidents caused during erection are avoided; in addition, when the PC track beam 4 is adjusted, the three-way adjusting mechanism 3 moves the PC track beam 4 along the transverse bridge direction, the longitudinal bridge direction and the elevation direction, the multi-way adjustment achieves accurate movement, the connecting piece 21 is in a loose state during movement, and the connecting piece 21 is adjusted to be in an immediately tight state after adjustment is finished, so that the purpose of accurate and safe adjustment is achieved.
(2) A simple PC track beam erection method is characterized in that the linear adjusting device is used for erecting a PC track beam 4, the linear of the PC track beam 4 is adjusted according to a certain sequence, the verticality, the smoothness and the elevation of a beam end joint are sequentially adjusted without multiple times of adjustment, and the horizontal and longitudinal design axes and the design side line which are lofted are used as the basis, so that the feedback adjustment is carried out in time according to the actual value without repeated debugging, and a large amount of time and labor can be saved.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A linear adjusting device for simply supporting a PC track beam is characterized by comprising at least two linear adjusting structures, wherein the linear adjusting structures comprise:
the supporting mechanism comprises two supporting mechanisms (1) with adjustable lengths, wherein the supporting mechanisms (1) are distributed at intervals along the transverse bridge direction, the bottom ends of the supporting mechanisms (1) are used for being assembled on a bearing platform (5), and the top ends of the supporting mechanisms are used for supporting a PC track beam (4);
the stabilizing mechanism (2) comprises a stabilizing frame (20), a groove body matched with the top of the PC track beam (4) is arranged at the bottom of the stabilizing frame (20), the stabilizing frame (20) is arranged on the PC track beam (4) through the groove body, two ends of the stabilizing frame (20) are connected with connecting pieces (21) with adjustable tightness, and one ends, far away from the stabilizing frame (20), of the connecting pieces (21) are used for being connected with the bearing platform (5);
and the three-way adjusting mechanism (3) is assembled on the bearing platform (5) and used for adjusting the PC track beam (4) along the transverse bridge direction, the longitudinal bridge direction and the elevation direction.
2. The linear adjustment device for simple PC track beam erection as claimed in claim 1, wherein:
the connecting piece (21) comprises a connecting rope (211) and a turn buckle (212), the turn buckle (212) is embedded in the bearing platform (5), one end of the connecting rope (211) is connected with the stabilizing frame (20), and the other end of the connecting rope is connected with the turn buckle (212); and/or the presence of a gas in the gas,
the supporting mechanism (1) comprises a sand cylinder (10) and a plurality of gaskets (11), and the sand cylinder (10) is used for bearing the PC track beam (4); the gasket (11) is arranged at the top of the sand cylinder (10); and/or the presence of a gas in the gas,
the three-way adjusting mechanism (3) adopts a three-way jack.
3. The method for erecting the simply supported PC track beam is characterized by comprising the following steps of:
providing at least two linear adjustment devices for the erection of simple supported PC track beams as claimed in claim 1;
determining a longitudinal design axis and a transverse design axis of each bearing platform (5) and design sidelines of sidelines on two sides of the transverse bridge of the PC track beam (4), wherein the design sidelines are positioned on the bearing platforms (5);
assembling the support mechanism (1) on the bearing platform (5), and dropping the PC track beam (4) on the support mechanism (1);
mounting the stabilizing mechanism (2) and the three-way adjusting mechanism (3);
and adjusting the line type of the line formed by the PC track beam (4) by utilizing the supporting mechanism (1), the stabilizing mechanism (2) and the three-way adjusting mechanism (3) according to the longitudinal design axis, the transverse design axis and the design sideline.
4. The erection method of a simple PC track beam as claimed in claim 3, wherein adjusting the linetype of the PC track beam (4) by means of the support mechanism (1), the stabilizing mechanism (2) and the three-way adjusting mechanism (3) according to the longitudinal design axis, the transverse design axis and the design borderline comprises the following steps:
adjusting the beam end gap of two adjacent PC track beams (4);
adjusting the verticality of the PC track beam (4);
adjusting the line central line of the PC track beam (4);
adjusting the horizontal line-type rise and the vertical line-type rise of the beam end connection part of two adjacent PC track beams (4);
and adjusting the absolute elevation of the rail surface at the beam end of the PC track beam (4).
5. The erection method of a simple PC track beam as claimed in claim 4, wherein adjusting the beam end gap of two adjacent PC track beams (4) comprises the steps of:
adjusting the tightness of the connecting piece (21), and moving the PC track beam (4) along the longitudinal bridge direction by using the three-way adjusting mechanism (3) so as to enable the distance between the beam end of the PC track beam (4) and the transverse design axis of the bearing platform (5) on the side where the beam end is located to reach a first set value.
6. The erection method of a simple PC track beam as claimed in claim 4, wherein adjusting the perpendicularity of the PC track beam (4) comprises the steps of:
two side lines in the transverse bridge direction of the PC track beam (4) are provided with line pendants;
adjusting the tightness of the connecting piece (21) and the length of the supporting mechanism (1) so that the projections of the two line weights on the bearing platform (5) are respectively positioned on the two design side lines.
7. The erection method of a simple PC track beam as claimed in claim 4, wherein adjusting the line centre line of the PC track beam (4) comprises the steps of:
a line drop is arranged at the center of the two ends of the PC track beam (4) in the transverse bridge direction;
adjusting the tightness of the connecting piece (21), and moving the PC track beam (4) along the transverse bridge direction by using the three-way adjusting mechanism (3) so as to enable the projections of the two line weights on the bearing platform (5) to be positioned on a longitudinal design axis.
8. The erection method of a simple supported PC track beam as claimed in claim 4, wherein adjusting the horizontal and vertical line-type rise at the beam end connection of two adjacent PC track beams (4) comprises the steps of:
adjusting the tightness of the connecting piece (21), and moving the beam end of the PC track beam (4) along the transverse bridge direction by using the three-way adjusting mechanism (3) to enable the horizontal line-type rise of the beam end connection part of the PC track beam (4) to reach a second design value;
adjusting the tightness of the connecting piece (21), and moving the beam end of the PC track beam (4) along the elevation direction by using the three-way adjusting mechanism (3) to enable the vertical line type rise of the beam end connecting part of the PC track beam (4) to reach a third design value.
9. The erection method of a simple PC track beam as claimed in claim 4, wherein adjusting the absolute elevation of the beam end rail plane of the PC track beam (4) comprises the steps of:
adjust the elasticity of connecting piece (21), and utilize three-dimensional adjustment mechanism (3) remove along the elevation direction PC track roof beam (4) circuit beam-ends makes the absolute elevation of PC track roof beam (4) circuit beam-ends rail surface reaches the fourth design value.
10. The erection method of simple support PC track beam of claim 3, characterized in that, confirm the longitudinal design axis and horizontal design axis of each cushion cap (5), and PC track roof beam (4) horizontal bridge to the design sideline of the sideline of both sides, the said design sideline locates on cushion cap (5), comprising the following steps:
obtaining a longitudinal design axis of the bearing platform (5) according to the design center coordinate of the bearing platform (5), the included angle of the designed PC track beam line advancing direction and the total station;
making a perpendicular line between the design center of the bearing platform (5) and the longitudinal design axis to obtain a transverse design axis;
according to the beam width of the PC track beam (4), design side lines which are symmetrical on two sides of a longitudinal design axis are obtained on the bearing platform (5).
CN202011383089.6A 2020-11-30 2020-11-30 Simply supported PC track beam erection method and linear debugging device Active CN112502047B (en)

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