CN114737549A - Hydraulic ship elevator tower and vertical shaft steel lining pipe group integrated construction method - Google Patents
Hydraulic ship elevator tower and vertical shaft steel lining pipe group integrated construction method Download PDFInfo
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- CN114737549A CN114737549A CN202111052517.1A CN202111052517A CN114737549A CN 114737549 A CN114737549 A CN 114737549A CN 202111052517 A CN202111052517 A CN 202111052517A CN 114737549 A CN114737549 A CN 114737549A
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- 238000010276 construction Methods 0.000 title claims abstract description 41
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- 238000007667 floating Methods 0.000 claims abstract description 32
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 21
- 239000004567 concrete Substances 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
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- 238000001514 detection method Methods 0.000 abstract 2
- 238000013461 design Methods 0.000 description 15
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02C—SHIP-LIFTING DEVICES OR MECHANISMS
- E02C5/00—Mechanisms for lifting ships vertically
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to an integrated construction method for a tower building and a vertical shaft steel lining pipe group of a hydraulic ship lift, and belongs to the technical field of construction of navigation buildings of hydropower stations. The invention solves the problems of large deformation and difficult control of self precision and relative position precision in the construction process of the vertical shaft steel lining pipe group in the tower of the hydraulic ship lift. The deformation of the vertical shaft steel lining pipe group is controlled by adopting a process of internally and externally adding dense supports and scientific pouring in the vertical shaft steel lining; the floating measurement of the datum point at the bottom of the center of the vertical shaft steel liner tube group is fixed by combining a movable inner supporting device with a reverse perpendicular line floating measuring point method detection mode, and the accumulated error of the detection data is eliminated. The technical scheme provided by the invention realizes high-precision one-step forming rapid construction of the ultrahigh large-diameter shaft steel lining pipe group and the hollow thin-wall tower.
Description
Technical Field
The invention belongs to the technical field of hydropower station navigation building construction, and particularly relates to an integrated construction method of a hydraulic ship lift tower and a vertical shaft steel lining pipe group.
Background
The hydraulic ship lift adopts the difference between the water levels upstream and downstream of the dam as power, converts the potential energy of water into mechanical energy, and drives the ship-bearing chamber to lift and vertically run. The floating pontoon balance weight is immersed into the water in the corresponding vertical shaft steel lining by a certain submerging depth to realize full balance with the weight of the ship reception chamber, the water level in the vertical shaft steel lining is reduced or increased, the floating pontoon balance weight correspondingly moves downwards or upwards in the vertical shaft steel lining, and the ship reception chamber correspondingly moves upwards or downwards through synchronous rotation of mechanical lifting equipment.
The hydraulic ship lift tower is a main bearing structure of the ship lift and is arranged in bilateral symmetry to bear suspension operation loads such as a ship bearing chamber, a balance weight and the like, external water loads and top machine room equipment loads. A plurality of vertical shafts are arranged in each tower, the structure is complex, the structure is a typical high-rise hollow thin-wall reinforced concrete structure, and the construction quality is a precondition for ensuring the safe and reliable operation of the structure of the ship lift.
In the running process of the ship lift, when the ship chamber is launched, the reasonable clearance between the vertical shaft and the floating cylinders is an important parameter for ensuring the launching speed of the ship chamber and the buoyancy balance among the floating cylinders so as to ensure the stability of a ship lift system. The peripheral clearance of flotation pontoon is asymmetric, will make the peripheral resistance coefficient of flotation pontoon change, influences the stability of flotation pontoon, also makes the flotation pontoon adapt to water conservancy wobbling space simultaneously and reduces, has increased the possibility that the flotation pontoon blocked in the shaft. Therefore, the precision of the vertical shaft directly influences the motion state of the buoy, and the poor precision control can influence the normal operation of the buoy in the vertical shaft, thereby influencing the operation of the ship lift.
The vertical shaft steel lining structure is an ultrahigh large-diameter thin-wall steel pipe structure, and the common construction method comprises the steps of embedding dowel bars in a first stage, installing the dowel bars in reserved steel pipe installation grooves and ensuring the installation accuracy of the steel pipe in a second-stage pouring mode. However, this method has the following disadvantages:
(1) the structural integrity of the high hollow thin-wall tower is difficult to ensure;
(2) the construction period is long, and the construction interference is large;
(3) the construction space is narrow, the quality indexes such as the local deformation of the inner wall, the verticality and the cylindricity of the vertical shaft in the pouring process of the steel lining of the vertical shaft are difficult to control, and the quality index requirements of the steel lining of the vertical shaft are difficult to guarantee.
Therefore, how to overcome the defects of the prior art is a problem to be solved urgently in the technical field of hydropower station navigation building construction.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a hydraulic ship lift tower and shaft steel lining pipe group integrated construction method, which realizes the deformation control of a high-precision ultrahigh large-diameter thin-wall steel pipe structure and meets the requirements of tower and shaft structure integrated rapid construction and quality control.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a hydraulic ship lift tower and shaft steel lining pipe group integrated construction method comprises the following steps:
step (1), calculating the center of a vertical shaft circle by a vertical shaft steel lining coaxiality inverted vertical line floating type measuring method so as to realize accurate control of the mounting verticality, the roundness and the local deformation of the ultrahigh large-diameter vertical shaft steel lining structure;
step (2), a movable inner support rounding machine frame device and a steel lining outer support structure are adopted to control deformation in the vertical shaft steel lining hoisting and concrete pouring processes;
and (3) constructing a high hollow thin-wall tower structure:
casting by adopting a horizontal casting method, symmetrically carrying out multipoint blanking, symmetrically vibrating, and casting in layers, wherein the layer height is controlled to be 40-50 cm;
the method comprises the steps of measuring a vertical shaft steel lining along with the rising of concrete, detecting the radius of the inner wall of the steel lining, monitoring the deformation condition of the steel lining, and if an abnormal phenomenon exists, adjusting the concrete pouring mode or stopping the bin in time to adjust and reinforce the steel lining.
The abnormal phenomenon refers to that when the roundness error of the steel lining is measured to be larger than 10mm or exceeds the deviation of the design value by +/-5 mm, adjustment is carried out at the moment until the roundness error is not larger than 10mm and is within +/-5 mm of the design value, and reinforcement is carried out again after the adjustment is finished, so that the subsequent pouring process is not abnormal.
Further, it is preferable that the specific method of step (1) is:
(1.1) before the shaft steel lining is installed, measuring the actual central coordinate, horizontal elevation, roundness and outer diameter of each water transmission port of the shaft pipe group by using a total station, determining the position coordinate of the transverse and longitudinal central axes of the shaft steel lining pipe group according to the relative deviation of the central coordinate of the water transmission port and the transverse and longitudinal axes of a ship lift, measuring and releasing an installation sample point of the center of the water transmission port of the shaft bottom lining, installing a bottom lining, after the bottom lining is installed and poured, arranging a channel steel sample frame at the center of each bottom steel lining water transmission port, and measuring and releasing a shaft steel lining installation reference point by using the total station;
(1.2) arranging a channel steel bracket at the mounting center of each bottom steel lining, fixedly connecting a channel steel sample frame on the channel steel bracket, measuring and placing a mounting center datum point on the channel steel sample frame, and checking the mounting base center point deviation on the X axis and the Y axis of the vertical shaft steel lining pipe group; drilling a through hole at a center datum point on the channel steel sample frame, and then leading a vertical line upwards to be a center datum line of floating measurement;
(1.3) installing vertical shaft steel linings in sections;
(1.4) hanging the movable inner support of the upper pipe orifice of the vertical shaft steel lining on the pipe wall of the vertical shaft steel lining, and laying a measuring operation platform;
(1.5) placing a buoy on a measuring support of an upper pipe orifice of a vertical shaft steel lining, adjusting the buoy, connecting the buoy with a bolt at the upper end of a connecting rod through a circular pressing plate to form a whole, and placing the whole into the buoy;
(1.6) pulling up the inverted vertical line to be wound with a bolt at the bottom of the connecting rod and tightly pressing the bolt;
(1.7) adjusting a nut at the top of the connecting rod, primarily tightening the inverted vertical line, injecting water into the floating barrel to the position of the corresponding buoyancy groove, and adjusting the nut at the top of the connecting rod again to enable the inverted vertical line to meet the requirement of tension; the tensile force requirements are specifically as follows: the pulling force is 2.5 to 3 times of the buoyancy of the floater;
(1.8) horizontally shifting the floater in four directions, checking the reset error of the floater, and carrying out measurement operation after the requirements are met; meets the requirements: the method is characterized in that the floater is in a free floating state, no jamming phenomenon exists, and the resetting error of the floater is not more than 0.5 mm;
and (1.9) measuring the size deviation of each horizontal section of the inner wall of the vertical shaft steel lining by using a measuring scale, fitting the coaxiality of the vertical shaft steel lining, and adjusting the installation levelness and section roundness of the vertical shaft steel lining. The specific requirements for adjusting the installation levelness and the section roundness of the vertical shaft steel lining are as follows: the levelness is adjusted to be not more than 2mm, and the roundness is adjusted to have the roundness error not more than 10mm and within +/-5 mm of the deviation of the design value.
Further, in the step (1.2), preferably, the central reference point on the channel steel is drilled with a through hole which is 1mm far back, and the inverted vertical line which is 0.7mm far back is led upwards to be the central reference line of the float measurement.
Further, it is preferable that the specific method of the step (2) is:
(2.1) internal support connecting rods are adopted in 4 symmetrical directions between supports in each layer, and the connecting rods are connected by bolts, so that the connection is convenient to disassemble and recycle, and the figure is 3;
(2.2) before hoisting, shortening the stud mandrils at two ends of the inner support connecting rod to avoid blocking when the inner support connecting rod is in place and scratching a cylinder wall coating; after the steel lining is in place, according to the actually measured roundness condition of the pipe orifice, firstly tightly jacking the stud ejector rod with the diameter of the steel lining being less than 5mm of the designed diameter, then contracting the stud ejector rod with the diameter of the steel lining being more than 5mm of the designed diameter, rebounding the part, with the diameter being more than 5mm of the designed diameter, of the steel lining, reducing the diameter, and then integrally re-measuring the roundness, and repeatedly carrying out jacking, contraction and roundness re-measurement for many times until the roundness error of the inner wall section of the steel lining of the vertical shaft is not more than 10mm and the steel lining is qualified within +/-5 mm of the designed value;
(2.3) uniformly distributing a plurality of reinforcing points outside the vertical shaft steel lining, wherein each outer reinforcing point is fixed by an inclined strut;
and (2.4) uniformly distributing a plurality of anchor hooks on each stiffening ring of the vertical shaft steel lining.
Further, in the step (2.3), it is preferable that 12 reinforcing points are uniformly distributed on the outer side of the shaft steel lining, and each outer reinforcing point is fixed by a steel section diagonal brace.
Further, in the step (2.4), preferably, 40 anchor hooks are uniformly distributed on each stiffening ring of the shaft steel lining.
Further, preferably, in the step (3), during pouring, high-flow concrete is poured at the positions where the double-layer and multi-layer reinforcing mesh and the horizontal and vertical reinforcing steel bars are crossed, so that the problem that the normal concrete cannot be vibrated to be dense is solved.
Further, preferably, in the step (3), the steel lining of the vertical shaft is measured comprehensively every time the concrete rises by 0.5m, the radius of the inner wall of the steel lining is detected, and the deformation condition of the steel lining is monitored.
Compared with the prior art, the invention has the beneficial effects that:
(1) the tower structure is built by adopting the prior art, the shaft steel lining is pre-buried in the second stage, the pre-buried space in the second stage of the steel lining needs to be reserved, the width of the single-side structure of the tower is about 1m (about 2 m) wider than that of the tower adopting the integrated forming technology, the integral width of the tower is reduced by adopting the integrated forming technology, the arrangement of a ship elevator is more flexible, and the building material is saved by about 14%;
(2) the one-stage pouring and one-step forming technology is adopted, the second-stage installation procedure of the vertical shaft steel lining is cancelled, the interference among construction procedures is reduced, the construction progress is accelerated, and the construction period is shortened by about 2 months compared with the prior art;
(3) the floating type measurement method of the coaxiality reverse perpendicular line is adopted, the axial vertical deviation of the steel lining of the vertical shaft can be automatically obtained, the operation is simple and reliable, the monitoring and checking can be carried out at any time, and the construction quality is always in a reliable and controlled state; the movable inner support rounding machine frame device is adopted, the deformation of the vertical shaft steel lining can be timely adjusted, the roundness error is controlled within the range of not more than 10mm and within +/-5 mm of the deviation of a design value, and the precision is superior to that of the precision which can be achieved by the prior art.
(4) Under the condition of internal and external dense supports of the vertical shaft steel lining, multipoint blanking, symmetrical vibrating and layered pouring are adopted in the concrete pouring process, meanwhile, high-flow state concrete is adopted at the positions of double layers and multiple layers of reinforcing steel bar nets, the positions of the horizontal direction and vertical direction reinforcing steel bars in a crossed mode and the like, and the concrete pouring compactness is superior to the level which can be achieved by the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an inverted vertical line of coaxiality float survey;
FIG. 2 is a schematic view of a measurement arrangement of a foundation point of a vertical shaft steel lining pipe group; wherein, (a) is the arrangement of the steel lining at the bottom of the vertical shaft steel lining pipe group; (b) a schematic diagram is set for a base measuring point of a bottom steel lining; (c) a cross-sectional view A-A of (b);
FIG. 3 is a schematic view of a movable inner support rounding machine frame device for a shaft steel lining; wherein, (a) is an elevation view and (b) is a plan view.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "provided" are to be construed broadly, e.g., as being fixed or detachable or integrally connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
A hydraulic ship lift tower and vertical shaft steel lining pipe group integrated construction method comprises the following steps:
step (1), calculating the center of a vertical shaft circle by a vertical shaft steel lining coaxiality inverted vertical line floating type measuring method so as to realize accurate control of the mounting verticality, the roundness and the local deformation of the ultrahigh large-diameter vertical shaft steel lining structure;
step (2), a movable inner support rounding machine frame device and a steel lining outer support structure are adopted to control deformation in the vertical shaft steel lining hoisting and concrete pouring processes;
step (3), constructing a high hollow thin-wall tower structure:
pouring by adopting a flat pouring method, adopting symmetrical multi-point blanking, adopting symmetrical vibration and layered pouring, and controlling the layer height between 40cm and 50 cm;
the method comprises the steps of measuring a vertical shaft steel lining along with the rising of concrete, detecting the radius of the inner wall of the steel lining, monitoring the deformation condition of the steel lining, and if an abnormal phenomenon exists, adjusting the concrete pouring mode or stopping the bin in time to adjust and reinforce the steel lining.
The abnormal phenomenon refers to that when the roundness error of the steel lining is measured to be larger than 10mm or exceeds the deviation of the design value by +/-5 mm, adjustment is carried out at the moment until the roundness error is not larger than 10mm and is within +/-5 mm of the design value, and reinforcement is carried out again after the adjustment is finished, so that the subsequent pouring process is not abnormal any more.
Example 2
A hydraulic ship lift tower and shaft steel lining pipe group integrated construction method comprises the following steps:
step (1), calculating the center of a vertical shaft circle by a vertical shaft steel lining coaxiality inverted vertical line floating type measuring method so as to realize accurate control of the mounting verticality, the roundness and the local deformation of the ultrahigh large-diameter vertical shaft steel lining structure;
step (2), a movable inner support rounding machine frame device and a steel lining outer support structure are adopted to control deformation in the vertical shaft steel lining hoisting and concrete pouring processes;
and (3) constructing a high hollow thin-wall tower structure:
pouring by adopting a flat pouring method, adopting symmetrical multi-point blanking, adopting symmetrical vibration and layered pouring, and controlling the layer height between 40cm and 50 cm;
the method comprises the steps of measuring a vertical shaft steel lining along with the rising of concrete, detecting the radius of the inner wall of the steel lining, monitoring the deformation condition of the steel lining, and if an abnormal phenomenon exists, adjusting the concrete pouring mode or stopping the bin in time to adjust and reinforce the steel lining.
The abnormal phenomenon refers to that when the roundness error of the steel lining is measured to be larger than 10mm or exceeds the deviation of the design value by +/-5 mm, adjustment is carried out at the moment until the roundness error is not larger than 10mm and is within +/-5 mm of the design value, and reinforcement is carried out again after the adjustment is finished, so that the subsequent pouring process is not abnormal any more.
The specific method of the step (1) is as follows:
(1.1) before the shaft steel lining is installed, measuring the actual central coordinate, horizontal elevation, roundness and outer diameter of each water transmission port of the shaft pipe group by using a total station, determining the position coordinate of the transverse and longitudinal central axes of the shaft steel lining pipe group according to the relative deviation of the central coordinate of the water transmission port and the transverse and longitudinal axes of a ship lift, measuring and releasing an installation sample point of the center of the water transmission port of the shaft bottom lining, installing a bottom lining, after the bottom lining is installed and poured, arranging a channel steel sample frame at the center of each bottom steel lining water transmission port, and measuring and releasing a shaft steel lining installation reference point by using the total station;
(1.2) arranging a channel steel bracket at the mounting center of each bottom steel lining, fixedly connecting a channel steel sample frame on the channel steel bracket, measuring and placing a mounting center datum point on the channel steel sample frame, and checking the mounting base center point deviation on the X axis and the Y axis of the vertical shaft steel lining pipe group; drilling a through hole at a center datum point on the channel steel sample frame, and then leading a vertical line upwards to be a center datum line of floating measurement;
(1.3) installing vertical shaft steel linings in sections;
(1.4) hanging the movable inner support of the upper pipe orifice of the vertical shaft steel lining on the pipe wall of the vertical shaft steel lining, and laying a measuring operation platform;
(1.5) placing a buoy on a measuring support of an upper pipe orifice of a vertical shaft steel lining, adjusting the buoy, connecting the buoy with a bolt at the upper end of a connecting rod through a circular pressing plate to form a whole, and placing the whole into the buoy;
(1.6) pulling up the inverted vertical line to be wound with a bolt at the bottom of the connecting rod and tightly pressing the bolt;
(1.7) adjusting a nut at the top of the connecting rod, primarily tightening the inverted vertical line, injecting water into the floating barrel to the position of the corresponding buoyancy scribed line, and adjusting the nut at the top of the connecting rod again to enable the inverted vertical line to meet the requirement of tension; the tensile force requirements are specifically as follows: the pulling force is 2.5 to 3 times of the buoyancy of the floater;
(1.8) horizontally shifting the floater in four directions, checking the reset error of the floater, and carrying out measurement operation after the requirements are met; meets the requirements: the float is in a free floating state, the jamming phenomenon is avoided, and the reset error of the float is not more than 0.5 mm;
and (1.9) measuring the size deviation of each horizontal section of the inner wall of the vertical shaft steel lining by using a measuring scale, fitting the coaxiality of the vertical shaft steel lining, and adjusting the installation levelness and section roundness of the vertical shaft steel lining. The specific requirements for adjusting the installation levelness and the section roundness of the vertical shaft steel lining are as follows: the levelness is adjusted to be not more than 2mm, and the roundness is adjusted to have the roundness error not more than 10mm and within +/-5 mm of the deviation of the design value.
In the step (1.2), a central reference point on the channel steel is drilled with a through hole of 1mm, and the upward guide shaft is extended to a reverse perpendicular line of 0.7mm to be a central reference line of floating measurement.
Example 3
A hydraulic ship lift tower and shaft steel lining pipe group integrated construction method comprises the following steps:
step (1), calculating the center of a vertical shaft circle by a vertical shaft steel lining coaxiality inverted vertical line floating type measuring method so as to realize accurate control of the mounting verticality, the roundness and the local deformation of the ultrahigh large-diameter vertical shaft steel lining structure;
step (2), a movable inner support rounding machine frame device and a steel lining outer support structure are adopted to control deformation in the vertical shaft steel lining hoisting and concrete pouring processes;
and (3) constructing a high hollow thin-wall tower structure:
pouring by adopting a flat pouring method, adopting symmetrical multi-point blanking, adopting symmetrical vibration and layered pouring, and controlling the layer height between 40cm and 50 cm;
the method comprises the steps of measuring a vertical shaft steel lining along with the rising of concrete, detecting the radius of the inner wall of the steel lining, monitoring the deformation condition of the steel lining, and if an abnormal phenomenon exists, adjusting the concrete pouring mode or stopping the bin in time to adjust and reinforce the steel lining.
The abnormal phenomenon refers to that when the roundness error of the steel lining is measured to be larger than 10mm or exceeds the deviation of the design value by +/-5 mm, adjustment is carried out at the moment until the roundness error is not larger than 10mm and is within +/-5 mm of the design value, and reinforcement is carried out again after the adjustment is finished, so that the subsequent pouring process is not abnormal.
The specific method of the step (1) is as follows:
(1.1) before the shaft steel lining is installed, measuring the actual center coordinate, horizontal elevation, roundness and outer diameter of each water conveying port of a shaft pipe group by using a total station, determining the position coordinate of the transverse and longitudinal central axis of the shaft steel lining pipe group according to the relative deviation of the center coordinate of the water conveying port and the transverse and longitudinal axis of a ship lift, measuring and releasing an installation sample point of the center of the water conveying port of the shaft bottom lining, installing a bottom lining, after the bottom lining is installed and poured, arranging a groove steel sample frame at the center of each bottom steel lining water conveying port, and measuring and releasing a shaft steel lining installation reference point by using the total station;
(1.2) arranging a channel steel bracket at the mounting center of each bottom steel lining, fixedly connecting a channel steel sample frame on the channel steel bracket, measuring and placing a mounting center datum point on the channel steel sample frame, and checking the mounting base center point deviation on the X axis and the Y axis of the vertical shaft steel lining pipe group; drilling a through hole at a center datum point on the channel steel sample frame, and then leading a vertical line upwards to be a center datum line of floating measurement;
(1.3) installing vertical shaft steel linings in sections;
(1.4) hanging the movable inner support of the upper pipe orifice of the vertical shaft steel lining on the pipe wall of the vertical shaft steel lining, and laying a measuring operation platform;
(1.5) placing a buoy on a measuring support of an upper pipe orifice of a vertical shaft steel lining, adjusting the buoy, connecting the buoy with a bolt at the upper end of a connecting rod through a circular pressing plate to form a whole, and placing the whole into the buoy;
(1.6) pulling up the inverted vertical line to be wound with a bolt at the bottom of the connecting rod and tightly pressing the bolt;
(1.7) adjusting a nut at the top of the connecting rod, primarily tightening the inverted vertical line, injecting water into the floating barrel to the position of the corresponding buoyancy groove, and adjusting the nut at the top of the connecting rod again to enable the inverted vertical line to meet the requirement of tension; the tensile force requirements are specifically as follows: the pulling force is 2.5 to 3 times of the buoyancy of the floater;
(1.8) horizontally shifting the floater in four directions, checking the reset error of the floater, and carrying out measurement operation after the requirements are met; meets the requirements: the float is in a free floating state, the jamming phenomenon is avoided, and the reset error of the float is not more than 0.5 mm;
and (1.9) measuring the size deviation of each horizontal section of the inner wall of the vertical shaft steel lining by using a measuring scale, fitting the coaxiality of the vertical shaft steel lining, and adjusting the installation levelness and section roundness of the vertical shaft steel lining. The concrete requirements for adjusting the installation levelness and the section roundness of the steel lining of the vertical shaft are as follows: the levelness is adjusted to be not more than 2mm, and the roundness is adjusted to have the roundness error not more than 10mm and within +/-5 mm of the deviation of the design value.
In step (1.2), the center datum point on the channel steel is drilled in the same direction as a through hole of 1mm, and the upward guide direction is the center datum line of floating measurement in the same direction as a reverse perpendicular line of 0.7 mm.
The specific method of the step (2) comprises the following steps:
(2.1) internal support connecting rods are adopted in 4 symmetrical directions between the supports in each layer, and the connecting rods are connected by bolts, so that the connection is convenient to disassemble and recycle, and the drawing of fig. 3 is shown;
(2.2) before hoisting, shortening the stud mandrils at two ends of the inner support connecting rod to avoid blocking when the inner support connecting rod is in place and scratching a cylinder wall coating; after the steel lining is in place, according to the actually measured roundness condition of the pipe orifice, firstly tightly jacking the stud ejector rod with the diameter of the steel lining being less than 5mm of the designed diameter, then contracting the stud ejector rod with the diameter of the steel lining being more than 5mm of the designed diameter, rebounding the part, with the diameter being more than 5mm of the designed diameter, of the steel lining, reducing the diameter, and then integrally re-measuring the roundness, and repeatedly carrying out jacking, contraction and roundness re-measurement for many times until the roundness error of the inner wall section of the steel lining of the vertical shaft is not more than 10mm and the steel lining is qualified within +/-5 mm of the designed value;
(2.3) uniformly distributing a plurality of reinforcing points outside the vertical shaft steel lining, wherein each outer reinforcing point is fixed by an inclined strut;
and (2.4) uniformly distributing a plurality of anchor hooks on each stiffening ring of the vertical shaft steel lining.
And (2.3) uniformly distributing 12 reinforcing points outside the vertical shaft steel lining, and fixing each outer reinforcing point by using a section steel diagonal brace.
In the step (2.4), 40 anchor hooks are uniformly distributed on each stiffening ring of the vertical shaft steel lining.
In the step (3), during pouring, high-flow concrete is poured at the positions where the double-layer and multi-layer reinforcing meshes and the horizontal and vertical reinforcing steel bars are crossed, so that the problem that the normal concrete cannot be vibrated and compacted is solved.
And (3) comprehensively measuring the steel lining of the vertical shaft once every time the concrete rises by 0.5m, detecting the radius of the inner wall of the steel lining, and monitoring the deformation condition of the steel lining.
Example 4
A hydraulic ship lift tower and shaft steel lining pipe group integrated construction method comprises the following steps:
step (1), calculating the center of a vertical shaft circle by a vertical shaft steel lining coaxiality inverted vertical line floating type measuring method so as to realize accurate control of the mounting verticality, the roundness and the local deformation of the ultrahigh large-diameter vertical shaft steel lining structure;
step (2), a movable inner support rounding machine frame device and a steel lining outer support structure are adopted to control deformation in the vertical shaft steel lining hoisting and concrete pouring processes;
and (3) constructing a high hollow thin-wall tower structure:
pouring by adopting a flat pouring method, adopting symmetrical multi-point blanking, adopting symmetrical vibration and layered pouring, and controlling the layer height between 40cm and 50 cm;
the method comprises the steps of measuring a vertical shaft steel lining along with the rising of concrete, detecting the radius of the inner wall of the steel lining, monitoring the deformation condition of the steel lining, and if an abnormal phenomenon exists, adjusting the concrete pouring mode or stopping the bin in time to adjust and reinforce the steel lining.
The abnormal phenomenon refers to that when the roundness error of the steel lining is measured to be larger than 10mm or exceeds the deviation of the design value by +/-5 mm, adjustment is carried out at the moment until the roundness error is not larger than 10mm and is within +/-5 mm of the design value, and reinforcement is carried out again after the adjustment is finished, so that the subsequent pouring process is not abnormal.
The specific method comprises the following steps:
the method comprises the steps of (I) automatically obtaining the center of a vertical shaft through a vertical shaft steel lining coaxiality inverted vertical line floating type measuring method, providing a high-precision measuring and controlling method for any height relative position deviation of a vertical shaft steel lining, and realizing precise control of the verticality, the roundness and the local deformation of an ultra-high large-diameter thin-wall vertical shaft steel lining structure.
(1) The floating measurement of the coaxiality inverted vertical line mainly utilizes the principle that the resultant force of a floater in the horizontal direction is automatically reset when the resultant force is equal to zero, so that the inverted vertical line is positioned at the vertical position, and the center of a circle of a vertical shaft is automatically determined at any elevation in the measurement range. The measuring device mainly comprises a buoy, a floater connecting rod, a measuring scale, an indium steel wire, a windproof pipe measuring bracket and the like, is an existing device, is an important means for vertically installing and measuring the steel lining of the ultrahigh large-diameter shaft, and is shown in figure 1 in detail;
(2) before the vertical shaft steel lining is installed, measuring the actual central coordinate, the horizontal elevation, the roundness and the outer diameter of each water conveying port of a vertical shaft pipe group by using a total station, determining the position coordinates of the horizontal central axis and the longitudinal central axis of the vertical shaft steel lining pipe group according to the central coordinate of the water conveying port and the design values of the horizontal axis and the longitudinal axis of a ship lift, measuring and placing an installation sample point of the center of the water conveying port of the vertical shaft bottom lining, welding a 25# channel steel as a channel steel bracket on each bottom steel lining water conveying port in the diameter direction after the installation of the bottom lining and pouring are completed, and welding the channel steel sample bracket at the middle position on the channel steel bracket, wherein the actual central coordinate, the horizontal elevation, the roundness and the outer diameter of each water conveying port of the vertical shaft pipe group are shown in a figure 2 (a), a figure 2 (b) and a figure 2 (c). Adopt the total powerstation, put shaft steel lining installation datum point direct survey on groove steel sample frame to the installation datum point on groove steel sample frame is bored in 1mm through-hole, upwards draws the diameter through this hole and in 0.7mm indium steel wire material's the perpendicular line that falls is floating measurement's center datum line. The welding of the channel steel sample frame and the channel steel bracket and the welding of the channel steel bracket and the bottom steel lining are reliable and firm, and the welding can be disassembled after the construction of the tower and the shaft steel lining is finished;
(3) the vertical shaft steel lining pipe groups are vertically installed in sections, the diameter phi of the inner wall of a single tall and large vertical shaft steel lining pipe is 6.5m, the height can reach 53m, 18 sections of installation units are vertically installed in sections according to actual conditions and needs, and the installation units and the tower building are poured synchronously;
(4) before hoisting a single section of vertical shaft steel lining, hanging a movable inner support rounding machine frame device on an upper pipe orifice of the vertical shaft steel lining in advance, and paving a steel plate net to form an operation platform; after the vertical shaft steel lining is hoisted in place, construction operators carry out butt joint of the upper section and the lower section of the vertical shaft steel lining on the operation platform.
(5) The float bowl is placed on a measuring bracket of an upper pipe orifice of the vertical shaft steel lining and is centered, and the float is connected with a bolt at the upper end of the connecting rod through a circular pressing plate to form a whole and is placed in the float bowl;
(6) the reverse vertical line is pulled up, passes through a central hole of a central body of the movable inner support rounding machine frame, and is wound and pressed with a bolt at the bottom of a connecting rod of the floater;
(7) adjusting a nut at the top of the connecting rod, primarily tightening the inverted vertical line, injecting water into the floating barrel to the position of the corresponding buoyancy scribed line, and adjusting the nut at the top of the connecting rod again to enable the inverted vertical line to meet the requirement of tension;
(8) the float is horizontally shifted in four directions, the reset error of the float is checked, and the measurement operation is carried out after the requirements are met;
(9) and measuring the size deviation of each horizontal section of the inner wall of the vertical shaft steel lining by using a measuring scale, fitting the coaxiality of the vertical shaft steel lining, and adjusting the installation levelness and the section roundness of the vertical shaft steel lining.
Secondly, a movable inner support rounding machine frame device and a steel lining outer support are adopted to control the deformation of the vertical shaft in the hoisting and concrete pouring processes;
(1) the movable inner support rounding machine frame device is shown in a figure 3 (a) and a figure 3 (b), and mainly comprises a central body, 4 layers of inner support connecting rods, a hook, a nut column ejector rod, a steel plate net and the like. The movable inner support rounding machine frame device can be detached for repeated use, has three functions as a construction operation operating platform and a measuring platform; the tool is also used for adjusting the roundness of the vertical shaft steel lining; meanwhile, the vertical shaft steel lining has the functions of supporting the inner wall of the vertical shaft steel lining and strengthening the rigidity of the structure, so that the stress on the outer part of the vertical shaft steel lining is uniform, and the deformation is reduced.
(2) Before the movable inner support rounding machine frame device is hoisted into a vertical shaft steel lining, stud ejector rods at two ends of an inner support connecting rod are shortened, and the phenomenon that the inner support connecting rod is blocked when in place and scratches a cylinder wall coating is avoided; after the vertical shaft steel lining is hoisted in place, according to the actually measured roundness condition of the pipe opening, firstly, a stud ejector rod with the steel lining diameter being smaller than the designed diameter by 5mm is tightly jacked, then, the stud ejector rod with the steel lining diameter being larger than the designed diameter by 5mm is contracted, at the moment, the part, larger than the designed diameter by 5mm, of the steel lining is rebounded, the diameter is reduced, the roundness is integrally re-measured, and the jacking, contraction and roundness re-measurement are repeatedly carried out for many times until the roundness error of the section of the inner wall of the vertical shaft steel lining is not larger than 10mm and the steel lining is qualified within +/-5 mm of the designed value.
(3) 12 reinforcing points are uniformly distributed on the outer side of the vertical shaft steel lining, and each outer reinforcing point is fixed by a profile steel diagonal brace, so that the integral stability of the steel lining in the concrete pouring process is ensured;
(4) 40 anchor hooks are uniformly distributed on each stiffening ring of the vertical shaft steel lining, so that the vertical shaft steel lining is prevented from springback deformation after the inner support is removed after the concrete pouring of the vertical shaft steel lining is finished.
And (III) formulating a scientific concrete pouring process and a deformation measuring method to realize the integrated rapid construction of the ship lift tower and the vertical shaft steel lining. The construction technology of the high-rise thin-wall tower column structure comprises the steps of layered pouring, multi-point blanking, symmetrical vibrating, high-flow-state concrete and one-step forming.
(1) The concrete is poured by adopting a flat pouring method, so that the height difference of the concrete on two sides of the steel lining is reduced;
(2) symmetrical multi-point blanking is adopted, and the blanking point is arranged outside a reinforcing mesh of a vertical shaft steel liner;
(3) symmetrical vibration and layered pouring are adopted, and the layer height is controlled to be 40-50 cm;
(4) high-flow concrete is poured at the positions of double-layer or multi-layer reinforcing mesh, the positions of the horizontal direction and the vertical direction of the crossed reinforcing steel bars and the like, so that the problem that the normal concrete cannot be vibrated and compacted is solved.
(5) The method comprises the steps of comprehensively measuring the steel lining of the vertical shaft once when the concrete rises by 0.5m, detecting the radius of the inner wall of the steel lining (8 vertical lines are uniformly distributed along the pipe wall, measuring from bottom to top, and measuring a point by four stiffening rings respectively), monitoring the deformation condition of the steel lining, and if an abnormal phenomenon exists, adjusting the concrete pouring mode or stopping the steel lining in time to reinforce the steel lining.
In the prior art, the pressure steel pipe civil structure of the water delivery system is generally arranged by reserving a second-stage pit in the civil pouring process, and after the first-stage pouring of the civil structure, the pressure steel pipe is installed in the second-stage reserved pit, so that the size of the civil structure is generally larger; in the prior art, the field installation control and adjustment of the pressure steel pipe generally adopt an inner and outer support system steel embedded structure, and an inner and outer support system steel component is usually reliably welded with the pressure steel pipe so as to ensure the installation construction quality.
The tower structure is a concrete tower structure with a high and large vertical shaft steel lining, and has the structural novelty that: the novel structure of the high hollow thin-wall tower adopts a one-stage pouring and one-step forming technology, cancels a second-stage installation procedure and accelerates the construction progress; the second-stage reserved pit pouring materials are reduced, and building materials are saved; according to the invention, on the movable inner support rounding machine frame device arranged on the inner wall of the tower shaft steel lining pipe group, a coaxiality inverted vertical line floating type measuring method is adopted, the vertical deviation of the shaft steel lining shaft can be automatically obtained, the construction quality is in a reliable and controlled state, and the operation is simple; the method has the advantages that the influence of concrete construction is reduced, the quality of construction procedures can be checked or monitored at any time, the deformation factors of the vertical shaft steel lining pipe group in the concrete solid structure pouring construction process are effectively controlled, and the construction quality of the vertical shaft is guaranteed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A hydraulic ship lift tower and vertical shaft steel lining pipe group integrated construction method is characterized by comprising the following steps:
step (1), calculating the center of a vertical shaft circle by a vertical shaft steel lining coaxiality inverted vertical line floating type measuring method so as to realize accurate control of the mounting verticality, the roundness and the local deformation of the ultrahigh large-diameter vertical shaft steel lining structure;
step (2), a movable inner support rounding machine frame device and a steel lining outer support structure are adopted to control deformation in the vertical shaft steel lining hoisting and concrete pouring processes;
and (3) constructing a high hollow thin-wall tower structure:
pouring by adopting a flat pouring method, adopting symmetrical multi-point blanking, adopting symmetrical vibration and layered pouring, and controlling the layer height between 40cm and 50 cm;
the method comprises the steps of measuring a vertical shaft steel lining along with the rising of concrete, detecting the radius of the inner wall of the steel lining, monitoring the deformation condition of the steel lining, and if an abnormal phenomenon exists, adjusting the concrete pouring mode or stopping the bin in time to adjust and reinforce the steel lining.
2. The hydraulic ship lift tower and vertical shaft steel lining pipe group integrated construction method according to claim 1, wherein the concrete method of the step (1) is as follows:
(1.1) before the shaft steel lining is installed, measuring the actual central coordinate, horizontal elevation, roundness and outer diameter of each water transmission port of the shaft pipe group by using a total station, determining the position coordinate of the transverse and longitudinal central axes of the shaft steel lining pipe group according to the relative deviation of the central coordinate of the water transmission port and the transverse and longitudinal axes of a ship lift, measuring and releasing an installation sample point of the center of the water transmission port of the shaft bottom lining, installing a bottom lining, after the bottom lining is installed and poured, arranging a channel steel sample frame at the center of each bottom steel lining water transmission port, and measuring and releasing a shaft steel lining installation reference point by using the total station;
(1.2) arranging a channel steel bracket at the mounting center of each bottom steel lining, fixedly connecting a channel steel sample frame on the channel steel bracket, measuring and placing a mounting center datum point on the channel steel sample frame, and checking the mounting base center point deviation on the X axis and the Y axis of the vertical shaft steel lining pipe group; drilling a through hole at a center datum point on the channel steel sample frame, and then leading a vertical line upwards to be a center datum line of floating measurement;
(1.3) installing vertical shaft steel linings in sections;
(1.4) hanging the movable inner support of the upper pipe orifice of the vertical shaft steel lining on the pipe wall of the vertical shaft steel lining, and laying a measuring operation platform;
(1.5) placing a buoy on a measuring support of an upper pipe orifice of a vertical shaft steel lining, adjusting the buoy, connecting the buoy with a bolt at the upper end of a connecting rod through a circular pressing plate to form a whole, and placing the whole into the buoy;
(1.6) pulling up the inverted vertical line to be wound with a bolt at the bottom of the connecting rod and tightly pressing the bolt;
(1.7) adjusting a nut at the top of the connecting rod, primarily tightening the inverted vertical line, injecting water into the floating barrel to the position of the corresponding buoyancy groove, and adjusting the nut at the top of the connecting rod again to enable the inverted vertical line to meet the requirement of tension;
(1.8) horizontally shifting the floater in four directions, checking the reset error of the floater, and carrying out measurement operation after the requirements are met;
and (1.9) measuring the size deviation of each horizontal section of the inner wall of the vertical shaft steel lining by using a measuring scale, fitting the coaxiality of the vertical shaft steel lining, and adjusting the installation levelness and section roundness of the vertical shaft steel lining.
3. The integrated construction method of the tower and the shaft steel lining pipe group of the hydraulic ship lift according to claim 2, wherein in the step (1.2), the center reference point on the channel steel is drilled towards the middle of the through hole with the length of 1mm, and the upward direction and the 0.7mm reverse vertical line are the center reference lines of the floating measurement.
4. The hydraulic ship lift tower and vertical shaft steel lining pipe group integrated construction method according to claim 2, wherein the concrete method of the step (2) is as follows:
(2.1) internal support connecting rods are adopted in 4 symmetrical directions between supports in each layer, and the connecting rods are connected through bolts;
(2.2) before hoisting, shortening stud push rods at two ends of the inner support connecting rod to avoid blocking when the inner support connecting rod is in place; after the steel lining is in place, according to the actually measured roundness condition of the pipe orifice, firstly tightly jacking the stud ejector rod with the diameter of the steel lining being smaller than the designed diameter by 5mm, then contracting the stud ejector rod with the diameter of the steel lining being larger than the designed diameter by 5mm, rebounding the part of the steel lining with the diameter being larger than the designed diameter by 5mm, reducing the diameter, and then integrally re-measuring the roundness, and repeatedly carrying out jacking, contracting and roundness re-measuring for many times until the roundness error of the inner wall section of the steel lining of the vertical shaft is not larger than 10mm and is qualified within +/-5 mm of the designed value;
(2.3) uniformly distributing a plurality of reinforcing points outside the vertical shaft steel lining, wherein each outer reinforcing point is fixed by an inclined strut;
and (2.4) uniformly distributing a plurality of anchor hooks on each stiffening ring of the vertical shaft steel lining.
5. The integrated construction method of the tower building and the shaft steel lining pipe group of the hydraulic ship lift according to claim 4, wherein in the step (2.3), 12 reinforcing points are uniformly distributed on the outer side of the shaft steel lining, and each outer reinforcing point is fixed by a steel section diagonal brace.
6. The method for integrally constructing the tower and the shaft steel lining pipe group of the hydraulic ship lift according to claim 4, wherein in the step (2.4), 40 anchor hooks are uniformly distributed on each stiffening ring of the shaft steel lining.
7. The method as claimed in claim 1, wherein the step (3) of casting is performed by casting high flow concrete at the portions where the double-layered or multi-layered reinforcing meshes and the horizontal and vertical reinforcing bars intersect.
8. The hydraulic ship lift tower and shaft steel lining pipe group integrated construction method according to claim 1, wherein in the step (3), the shaft steel lining is measured comprehensively every time the concrete rises by 0.5m, the radius of the inner wall of the steel lining is detected, and the deformation condition of the steel lining is monitored.
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| DE102007000241A1 (en) * | 2007-04-25 | 2007-09-20 | Ed. Züblin Ag | Improved safety system for pillar-type threaded elements of vertical ship hoist of steel reinforced concrete has stacked threaded jaw elements connected by clamp elements under tension to be secure against compression and traction forces |
| CN201688844U (en) * | 2010-05-06 | 2010-12-29 | 中国葛洲坝集团股份有限公司 | Inverted vertical device for providing vertical reference for construction of high-rise building |
| CN106087934A (en) * | 2016-08-26 | 2016-11-09 | 中国葛洲坝集团机电建设有限公司 | A kind of coaxality measuring mechanism installed for hydraulic-floating vertical ship lift vertical shaft steel lining and detection method |
| CN106320311A (en) * | 2016-08-26 | 2017-01-11 | 中国葛洲坝集团机电建设有限公司 | Construction device and method for shaft steel liner of hydraulic floating vertical ship lift |
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- 2021-09-08 CN CN202111052517.1A patent/CN114737549A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007000241A1 (en) * | 2007-04-25 | 2007-09-20 | Ed. Züblin Ag | Improved safety system for pillar-type threaded elements of vertical ship hoist of steel reinforced concrete has stacked threaded jaw elements connected by clamp elements under tension to be secure against compression and traction forces |
| CN201688844U (en) * | 2010-05-06 | 2010-12-29 | 中国葛洲坝集团股份有限公司 | Inverted vertical device for providing vertical reference for construction of high-rise building |
| CN106087934A (en) * | 2016-08-26 | 2016-11-09 | 中国葛洲坝集团机电建设有限公司 | A kind of coaxality measuring mechanism installed for hydraulic-floating vertical ship lift vertical shaft steel lining and detection method |
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