CN111778850A

CN111778850A - Lower tower column tension and compression structure for cable tower and method thereof

Info

Publication number: CN111778850A
Application number: CN201910267385.0A
Authority: CN
Inventors: 王昌喜; 左翼; 蔡田; 瞿屯夫; 徐新波; 曹庆
Original assignee: CCCC SHB First Engineering Co Ltd
Current assignee: CCCC Second Highway Engineering Co Ltd; CCCC Highway Long Bridge Construction National Engineering Research Center Co Ltd; CCCC SHB First Engineering Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-10-16

Abstract

A lower tower column tension and compression structure for a cable tower and a method thereof comprise that an active pull rod and a support rod are arranged at the position of the lower tower column of the cable tower which is easy to deform. When the lower tower column of the cable tower is constructed, the bottom of the lower tower column of the cable tower is installed on the top surface of the bearing platform, the slope of the outer side surface of the lower tower column of the cable tower is 1/4.356, an auxiliary pull rod is arranged at a position, with a distance of 9m from the top surface of the bearing platform, in the tower column of the cable tower, the auxiliary pull rod is a pull rod formed by phi s15.2mm high-strength low-relaxation steel stranded wires, and all the phi s15.2mm high-strength low-relaxation steel stranded wires are wrapped by a steel pipe. The method effectively avoids the defects that in the prior art, the strength of the bracket for the construction of the lower cross beam of the cable tower is insufficient, the convenience for construction is low, and the deformation resistance of the cable tower is poor due to no treatment measures at places where the lower tower column of the cable tower is easy to deform.

Description

Lower tower column tension and compression structure for cable tower and method thereof

Technical Field

The invention belongs to the technical field of lower towers of cable towers, particularly relates to a lower tower column pulling and pressing structure and method for a cable tower, and particularly relates to a lower tower column pulling and pressing structure and method for an inverted Y-shaped cable tower.

Background

The pylon refers to a tower structure in which a main cable is supported by a suspension bridge or a cable-stayed bridge. The height of the cable tower is generally related to the main span of the bridge, and the ratio of the maximum span of the main beam to the height of the cable tower is generally 3.1-6.3, and the average is about 5.0. The cable tower structure has various types, and is mainly selected according to factors such as arrangement requirements of cables, bridge deck width, girder span and the like. The common cable-tower forms have a single column, an a-shape and an inverted Y-shape arranged longitudinally along the bridge.

With the continuous improvement of modern bridge construction technology, the finite element theory is mature day by day, the design concept and the construction equipment are advanced continuously, and in order to relieve the urban traffic pressure and enhance the landscape effect of the bridge, the modern bridge is developing towards the direction of large span, super width and light weight. Cable-stayed bridges and suspension bridges are increasingly used in bridge construction due to their strong spanning ability, ultra-wide bridge deck and elegant architectural shape. The lower beam and the lower tower column which are used as the main bearing structures of the bridge have the characteristics of width, height and weight along with the continuous increase of the size of the bridge deck.

In the construction of the conventional cable tower, particularly the inverted-Y cable tower, the construction of the lower cross beam and the lower tower column of the cable tower serving as a main bearing structure is particularly important, the conventional bracket for constructing the lower cross beam of the cable tower is only formed by erecting simple steel pipes, the strength of the bracket and the convenience for construction are not sufficient, and in addition, in the construction of the conventional lower tower column of the cable tower, no treatment measures are taken for the part where the lower tower column is easy to deform, so that the deformation resistance of the lower tower column is poor.

Disclosure of Invention

In order to solve the problems, the invention provides a lower tower column tension and compression structure for a cable tower and a method thereof, which effectively overcome the defects that in the prior art, the strength of a support for constructing a lower cross beam of the cable tower is insufficient, the construction is convenient, and the deformation resistance of the lower tower column of the cable tower is poor due to no treatment measures at places where the lower tower column is easy to deform.

In order to overcome the defects in the prior art, the invention provides a solution for a lower tower column tension and compression structure of a cable tower and a method thereof, which comprises the following steps:

a lower tower column tension and compression structure for a cable tower comprises the steps that modeling calculation is carried out on the structure of the lower tower column of the cable tower through finite element calculation software Midas civil, structural internal force and fulcrum counterforce are calculated, deformation conditions of the lower tower column of the cable tower are analyzed in advance, an active pull rod 1 and a support rod are arranged at the position of a lower tower column 2 of the cable tower, which is prone to deformation, so that linear stress in the lower tower column of the cable tower is ensured to be in a good design condition, and the lower tower column of the cable tower is ensured to have strong deformation resistance. The position of the lower tower column of the cable tower easy to deform can be modeled and calculated by finite element calculation software Midas civil according to the structure of the lower tower column of the cable tower, and structural internal force and fulcrum counterforce are calculated, so that 3-5 positions where deformation can occur earliest in the deformation condition of the lower tower column of the cable tower are analyzed in advance, and the 3-5 positions are used as the position of the lower tower column 2 of the cable tower easy to deform.

When the lower tower column 2 of the cable tower is constructed, the bottom of the lower tower column 2 of the cable tower is arranged on the top surface of the bearing platform 3 in a rigid connection mode, the slope of the outer side surface of the lower tower column 2 of the cable tower is 1/4.356, an auxiliary pull rod is arranged at the position, with the distance of 9m from the top surface of the bearing platform, in the tower column 2 of the cable tower, the auxiliary pull rod is formed by a plurality of phi s15.2mm high-strength low-relaxation steel stranded wires such as 4 in number, all the phi s15.2mm high-strength low-relaxation steel stranded wires are sheathed by a steel pipe, and the auxiliary pull rod is ensured to have good anti-external-pulling performance as the lining of the tower column of the cable tower. The horizontal active pull rod 1 can also adopt the same structure of the auxiliary pull rod, and the vertical support rod can adopt the reinforcing steel bar.

The lower tower column tension and compression structure for the cable tower further comprises a support structure for construction of a lower cross beam of the cable tower, and the support structure comprises a steel pipe structure and a profile steel structure;

the support structure specifically includes:

the vertical column 4, the horizontal cross brace 5, the longitudinal beam 6, the bailey truss 7, the cross beam 8, the distribution beam 9 and the plate-shaped support bottom plate 10 are sequentially and fixedly connected from bottom to top. By introducing the structure of the bailey frames 7, the distribution beams 9, the cross beams 8 and the plate-shaped support bottom plates 10, the defect that the strength of the support and the convenience for construction are insufficient due to the fact that the support only depends on a steel pipe structure in the prior art is overcome.

The upright post 4 is a phi 820 multiplied by 12mm steel pipe;

the first horizontal cross brace 5 is a steel pipe with the diameter phi of 426 multiplied by 10 mm;

one end of the reinforced inclined strut 11 is fixedly connected to the bottom of the horizontal cross strut I5, and the other end of the reinforced inclined strut 11 is fixedly connected to the side wall of the upright post 4, so that the function of reinforcing the structural strength of the support can be achieved; more than one second horizontal cross brace 12 is fixedly connected to the upright posts 4 and below the first horizontal cross brace 5, in addition, the number of the upright posts 4 is a plurality, and a cross inclined brace 13 is fixedly connected between two adjacent upright posts 4, so that the effect of strengthening the structural strength of the support can be further achieved;

the longitudinal beam 6 is I56b type I-shaped steel;

the cross beam 8 comprises a plurality of I36b type I-shaped steels, and the distance between every two adjacent I36b type I-shaped steels is 1 m;

the I12.6 distribution beam 9 with the distance of 0.7m comprises a plurality of 12.6# I-shaped steel, and the distance between every two adjacent 12.6# I-shaped steel is 0.7 m.

The method for the lower tower column tension and compression structure of the cable tower comprises the following steps:

step 1: completing the construction of the bearing platform and the tower seat; the height of the tower seat is 0.8m-1 m;

the method for completing the construction of the bearing platform and the tower base comprises the following steps:

constructing a bearing platform and a tower base, wherein the tower base is arranged at the top of the bearing platform, embedded parts are arranged on the bearing platform and the tower base, and the embedded parts are reinforcing steel bars;

step 2: installing a first construction tower crane 14 on the bearing platform, wherein the first construction tower crane is a C7022 tower crane;

and step 3: pouring the lower tower column section by using a turnover mould method;

the method for pouring the lower tower column section by using the rollover method comprises the following steps:

sequentially pouring a first lower tower column segment serving as a first segment, a second lower tower column segment serving as a second segment and a third lower tower column segment serving as a third segment on the tower base from bottom to top by using a turnover die method, so as to realize construction of a lower tower column, arranging an auxiliary pull rod at a position, which is 9m away from the top surface of a bearing platform, in a tower column 2 of the cable tower, wherein the auxiliary pull rod is formed by a plurality of phi s15.2mm high-strength low-relaxation steel stranded wires such as 4 steel wires, and all the phi s15.2mm high-strength low-relaxation steel stranded wires are sheathed by a steel pipe, so that the auxiliary pull rod is good in anti-external-pulling performance as an inner lining of the tower column of the cable tower; the horizontal active pull rod 1 can also adopt the same structure of the auxiliary pull rod, and the vertical support rod can adopt the reinforcing steel bar.

And 4, step 4: installing the support structure for constructing the lower cross beam of the cable tower;

and 5: a constructor pours lower beam concrete on the support structure for constructing the lower beam of the cable tower;

the method for the constructor to pour the lower beam concrete on the support structure for the lower beam construction of the cable tower comprises the following steps:

the constructor pours concrete into a first lower cross beam section serving as a fourth section and a second lower cross beam section serving as a fifth section from bottom to top on the support structure for constructing the lower cross beam of the cable tower, and additionally, a second construction tower crane 15 is also installed on the bearing platform, wherein the second construction tower crane 15 is an zsc1000 tower crane;

step 6: and after the concrete strength of the lower cross beam reaches the preset design requirement, tensioning the prestressed steel beam of the lower cross beam to complete the construction of the lower cross beam of the cable tower.

The die overturning method is a large-block steel die overturning method.

The method for pulling and pressing the lower tower column of the cable tower comprises the steps that a camera is arranged on a construction site of each step in the method for pulling and pressing the lower tower column of the cable tower and is used for collecting image information of the construction site of each step in the method for pulling and pressing the lower tower column of the cable tower, the camera is connected with a microcontroller, the microcontroller is connected with a first wireless module, the first wireless module is connected with a monitoring platform in a wireless network, the monitoring platform is provided with a second wireless module, the microcontroller can be a single chip microcomputer or a PLC, the first wireless module and the second wireless module can be 3G modules or 4G modules, the wireless network can be a 3G network or a 4G network, and the monitoring platform can be a computer or a tablet computer; the microcontroller is connected with the FLASH memory.

The FLASH FLASH memory stores: the system comprises an information transmission unit, a response receiving unit, a round trip time consumption derivation unit, an optimization round trip time consumption derivation unit, a wireless network performance estimation unit, a change performance test unit, a round trip time consumption mark transmission unit, a lost message detection unit, a transmission bandwidth change unit and a recovery link unit;

the information transmission unit is used for transmitting a first information message to the monitoring platform;

the information message is the information message in the construction site image information of each step in the method for the lower tower column tension and compression structure of the cable tower, wherein the microcontroller and the monitoring platform interact with each other in the format of the information message, and the microcontroller can transmit the information message I to more than one set monitoring platform and also can transmit the information message I to all the monitoring platforms connected with the microcontroller;

the response receiving unit is used for receiving an information message II with an achievement mark from the monitoring platform response, and the information message II is transmitted to the microcontroller after receiving the information message I from the monitoring platform;

when the monitoring platform receives the first information message transmitted by the microcontroller, the microcontroller transmitting the first information message needs to respond to the second information message with the achievement mark to inform the receiving of the first information message transmitted by the microcontroller and indicate that the message is not lost;

the back-and-forth time consumption deduction unit is used for deducing back-and-forth time consumption by means of the moment of transmitting the first information message and the moment of receiving the second information message;

estimating an index of the performance of a wireless network, wherein the performance efficiency of image information transmission of a construction site of each step in the method for pulling and pressing the structure by using the lower tower column of the cable tower is not only required, but also the time for transmitting the image information of the construction site of each step in the method for pulling and pressing the structure by using the lower tower column of the cable tower is required, the time is executed from the time of transmitting the first information message, and the time is terminated when receiving the second information message responded by the first information message, namely the time consumed by the back and forth between a microcontroller for transmitting the first information message and a monitoring platform for responding the second information message;

the optimized round trip time consumption derivation unit is used for performing summation on a plurality of round trip time consumptions derived in the set time length, deriving the optimized round trip time consumption by means of the variation performance of the round trip time consumptions, and evaluating the real time consumption condition of the wireless network in the time length;

the wireless network performance estimation unit is used for evaluating the wireless network performance by means of the round trip time consumption and the optimized round trip time consumption;

the variation performance test unit is used for executing a test on the variation performance of the derived round trip time consumption and the optimized round trip time consumption;

the back-and-forth time-consuming sign transfer unit is used for transferring a third information message with a back-and-forth time-consuming sign to the monitoring platform when the variation performance of the back-and-forth time-consuming or the optimized back-and-forth time-consuming is higher than a set critical number of the variation performance;

the lost message detection unit is used for testing a message loss state when receiving the information message transmitted by the monitoring platform, and responding an information message with a non-reached mark to the monitoring platform when testing the message loss;

the transmission bandwidth varying unit is used for adjusting the bandwidth of the first information message transmitted by the microcontroller to the monitoring platform;

the lost message detection unit is also used for testing that an information message with a termination identifier is transmitted to the monitoring platform when the monitoring platform cannot communicate because of message loss;

and the recovery linking unit is used for receiving the information message five with the termination identifier transmitted by the monitoring platform, and reconstructing the information link with the monitoring platform when receiving the information message five transmitted by the monitoring platform.

The collected image information of the construction site of each step in the method for pulling and pressing the structure of the lower tower column of the cable tower is transmitted to the microcontroller through the camera, and then the image information of the construction site of each step in the method for pulling and pressing the structure of the lower tower column of the cable tower is transmitted to the monitoring platform through the wireless module, so that the microcontroller transmits the image information of the construction site of each step in the method for pulling and pressing the structure of the lower tower column of the cable tower to the monitoring platform;

the mode that the microcontroller transmits the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower into the monitoring platform comprises the following steps:

a-1: transmitting a first information message to the monitoring platform;

the first mode of transmitting the information message to the monitoring platform is the mode executed by the information transmission unit;

a-2: receiving a second information message with an achievement mark which is responded after the monitoring platform receives the first information message;

the mode of receiving the information message II with the achievement mark responded by the monitoring platform after receiving the information message I is the mode executed by the response receiving unit;

a-3: deducing the back-and-forth time consumption by means of the time of transmitting the first information message and the time of receiving the second information message;

the time spent back and forth deriving means by the time when the first information packet is transmitted and the time when the second information packet is received is a means executed by the time spent back and forth deriving unit;

a-4: performing total to a plurality of back-and-forth time consumption deduced in the set time length, deducing the back-and-forth time consumption after optimization by means of the variation performance of the back-and-forth time consumption, and evaluating the real time consumption condition of the wireless network in the time length;

the method for evaluating the real time consumption condition of the wireless network in the set time length is a method executed by the optimized round trip time consumption deduction unit, wherein the round trip time consumption deduced in the set time length is summed up, and the optimized round trip time consumption is deduced according to the variation performance of the round trip time consumption;

a-5: evaluating wireless network performance by means of the round trip time consumption and the optimized round trip time consumption;

the mode of evaluating the wireless network performance by the round trip time consumption and the optimized round trip time consumption is the mode executed by the wireless network performance estimation unit;

a-6: adjusting the bandwidth for transmitting the first information message according to the evaluated wireless network performance;

the method for adjusting the bandwidth size for transmitting the first information message by the evaluated wireless network performance is the method executed by the transmission bandwidth varying unit;

the mode that the microcontroller transmits the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower into the monitoring platform further comprises the following steps:

b-1: performing a test on the variation performance of the derived round trip time consumption and the optimized round trip time consumption;

the mode for executing the test on the variation performance of the derived round trip time consumption and the optimized round trip time consumption is the mode executed by the variation performance test unit;

b-2: when the variation performance of the back-and-forth time consumption or the optimized back-and-forth time consumption is higher than a set critical number of the variation performance, transmitting an information message III with a back-and-forth time consumption mark to the monitoring platform;

when the variation performance of the round trip time consumption or the optimized round trip time consumption is higher than the set critical number of the variation performance, the mode of transmitting the information message III with the round trip time consumption mark to the monitoring platform is the mode executed by the round trip time consumption mark transmitting unit;

b-3: receiving an information message III with a back-and-forth time consuming mark transmitted by the monitoring platform, and adjusting the bandwidth size of the information message I when receiving the information message III transmitted by the monitoring platform;

receiving a third information message with a back-and-forth time consuming mark transmitted by the monitoring platform, and adjusting the bandwidth size of the first information message to be transmitted when receiving the third information message transmitted by the monitoring platform, namely the mode executed by the transmission bandwidth varying unit;

c-1: testing the message loss state when receiving the information message transmitted by the monitoring platform, and responding to the monitoring platform with an unachieved mark information message IV when testing the message loss;

the test is in a message loss state when receiving the information message transmitted by the monitoring platform, and when the test is in a message loss state, the mode of responding to the monitoring platform by the information message with the unachieved mark is the mode executed by the lost message detection unit;

c-2: receiving an information message IV with an unachieved mark responded by the monitoring platform, and transmitting the information message I to the monitoring platform again when receiving the information message IV transmitted by the monitoring platform;

the mode of receiving the information message IV with the unachieved mark responded by the monitoring platform and transmitting the information message I to the monitoring platform again when receiving the information message IV transmitted by the monitoring platform is the mode executed by the information transmission unit;

d-1: testing that an information message with a termination identifier is transmitted to the monitoring platform when the message is lost and the monitoring platform cannot communicate with the monitoring platform;

when the test is carried out that the message is lost and the communication with the monitoring platform is not possible, a mode of transmitting an information message with a termination identifier to the monitoring platform is a mode executed by the lost message detection unit;

d-2: receiving an information message five with a termination identifier transmitted by the monitoring platform, and when receiving the information message five transmitted by the monitoring platform, constructing an information link with the monitoring platform again;

and when receiving the information message five with the termination identifier transmitted by the monitoring platform, the information link with the monitoring platform is constructed again, namely the mode executed by the recovery link unit.

The invention has the beneficial effects that:

the lower tower column concrete and the lower cross beam of the cable tower are cast in sections by adopting an improved support structure and a large steel mould turnover mould, so that the linear stress in the lower tower column of the cable tower is ensured to be in a good design condition, namely the lower tower column of the cable tower is ensured to have strong deformation resistance. In addition, the structure of the bailey frames, the distribution beams, the cross beams and the plate-shaped support bottom plates is introduced, so that the defect that the strength of the support and the convenience for construction are insufficient due to the fact that the support only depends on a steel pipe structure in the prior art is overcome.

Drawings

FIG. 1 is a schematic structural diagram of an active tie bar arrangement according to the present invention;

FIG. 2 is a schematic view of the front side of the support structure of the present invention;

FIG. 3 is a schematic side view of the stent structure of the present invention;

fig. 4 is a construction view of a lower tower column and a lower cross member of the cable tower of the present invention.

Detailed Description

The invention will be further described with reference to the following figures and examples.

Example 1:

as shown in fig. 1-4, the lower column tension and compression structure for a cable tower comprises a finite element calculation software Midas civil for modeling and calculating the structure of the lower column of the cable tower, and calculating the structure internal force and the fulcrum counter force, so as to analyze the deformation condition of the lower column of the cable tower in advance, and an active pull rod 1 and a stay rod are arranged at the position of the lower column 2 of the cable tower which is easy to deform, so as to ensure that the linear stress in the lower column of the cable tower is in a good design condition, i.e. the deformation resistance of the lower column of the cable tower is strong. The position of the lower tower column of the cable tower easy to deform can be modeled and calculated by finite element calculation software Midas civil according to the structure of the lower tower column of the cable tower, and structural internal force and fulcrum counterforce are calculated, so that 3-5 positions where deformation can occur earliest in the deformation condition of the lower tower column of the cable tower are analyzed in advance, and the 3-5 positions are used as the position of the lower tower column 2 of the cable tower easy to deform.

the support structure specifically includes:

The upright post 4 is a phi 820 multiplied by 12mm steel pipe;

the longitudinal beam 6 is I56b type I-shaped steel;

The die overturning method is a large-block steel die overturning method.

Example 2:

the support structure specifically includes:

The upright post 4 is a phi 820 multiplied by 12mm steel pipe;

the longitudinal beam 6 is I56b type I-shaped steel;

The die overturning method is a large-block steel die overturning method.

In order to ensure real-time remote monitoring of a construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, a camera is arranged at the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower and is used for collecting image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, the camera is connected with a microcontroller, the microcontroller is connected with a first wireless module, the first wireless module is connected with a monitoring platform in a wireless network, the monitoring platform is provided with a second wireless module, the microcontroller can be a single chip microcomputer or a PLC, the first wireless module and the second wireless module can be 3G modules or 4G modules, the wireless network can be a 3G network or a 4G network, and the monitoring platform can be a computer or a tablet computer; thus, the collected image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower can be transmitted to the microcontroller through the camera, and then the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower can be transmitted to the monitoring platform through the wireless module, so that the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower can be transmitted to the monitoring platform through the microcontroller, the method for transmitting the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower to the monitoring platform is generally performed through the wireless network based on the wireless network and the transmission of the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower based on the handshake protocol or the connectionless protocol, and the microcontroller is linked to the wireless network, the factors such as the link position, the specification of the wireless module, and the size of the transmitted information power limit the transmission performance, and under the condition based on the handshake protocol or the connectionless protocol, the accuracy of information transmission is generally ensured through a response mode, however, the requirement of such a mode for timely transmitting the image is very poor in the performance of timely transmitting the information, and the performance of timely transmitting the information cannot be achieved only through the technology based on the connectionless protocol and the handshake protocol, so that how to improve the timely transmission performance of image information transmission at the construction site of each step in the method for the tower crane pulling and pressing structure under the condition of ensuring the information accuracy is a big problem which needs to be overcome urgently.

Thus, improvements are made, specifically as follows:

in order to ensure real-time remote monitoring of a construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, a camera is arranged at the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower and is used for collecting image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, the camera is connected with a microcontroller, the microcontroller is connected with a first wireless module, the first wireless module is connected with a monitoring platform in a wireless network, the monitoring platform is provided with a second wireless module, the microcontroller can be a single chip microcomputer or a PLC, the first wireless module and the second wireless module can be 3G modules or 4G modules, the wireless network can be a 3G network or a 4G network, and the monitoring platform can be a computer or a tablet computer; the microcontroller is connected with the FLASH memory.

the microcontroller can judge the wireless network performance by summing up the number of the transmitted information messages I and the number of the received information messages II, and the closer the number of the received information messages II and the number of the received information messages I are, the better the wireless network performance is.

The back-and-forth time consumption deduction unit is used for deducing back-and-forth time consumption by means of the moment of transmitting the first information message and the moment of receiving the second information message; specifically, the difference obtained by subtracting the time of transmitting the first information message from the time of receiving the second information message is the round trip time consumption.

Estimating an index of performance of a wireless network, not only an integration efficiency of image information transfer of a construction site at each step in the method of pulling and pressing a structure using a lower column for a pylon, which is a quotient obtained by dividing the number of image information of the construction site at each step in the method of pulling and pressing a structure using a lower column for a pylon smoothly transferred to a monitoring platform by the total number of image information of the construction site at each step in the method of pulling and pressing a structure using a lower column for a pylon transferred to the monitoring platform, and multiplying the quotient by one hundred percent to obtain an integration efficiency, and also a timing of image information transfer of the construction site at each step in the method of pulling and pressing a structure using a lower column for a pylon, from a timing of transferring an information message one to a timing of receiving an information message two responded by the information message one, the time consumption is consumed between the microcontroller for transmitting the information message I and the monitoring platform for responding the information message II;

during the transmission of image information of a construction site of each step in the method for pulling and pressing the lower tower column of the cable tower, the time consumption of leading back and forth between the microcontroller and each other monitoring platform connected with the microcontroller is often different due to the difference of wireless network performance, and the wireless network performance of the microcontroller and each other monitoring platform can be better through the time consumption of leading back and forth between each other microcontroller and each other monitoring platform.

during image information transmission of a construction site of each step in the method for pulling and pressing the lower tower column of the cable tower, leading out a back-and-forth time consumption for each pair of corresponding information message I and information message II, wherein the back-and-forth time consumption only represents wireless network performance at a certain moment, totaling a plurality of back-and-forth time consumptions which are led out, obtaining optimized back-and-forth time consumption by means of the change trend and the change condition of the back-and-forth time consumptions in a time length, judging the real time consumption condition of the wireless network in the time length by the optimized back-and-forth time consumptions which are the average number of the back-and-forth time consumptions, and the optimized back-and-forth time consumptions represent the wireless network performance in the time length.

the wireless network performance comprises the current wireless network bandwidth and the wireless network delay, and under the condition of deducing the back-and-forth time consumption and the optimized back-and-forth time consumption, the wireless network performance in a time period set in the future can be evaluated, so that the method for transmitting the image information of the construction site of each step in the method for pulling and pressing the lower tower column of the cable tower can be prepared in advance to adapt to the change of the wireless network performance.

the back-and-forth time-consuming symbol transfer unit is configured to transfer a third information message with the back-and-forth time-consuming symbol to the monitoring platform when the back-and-forth time-consuming or the optimized back-and-forth time-consuming variation performance is higher than a set threshold number of the variation performance.

The round trip time consumption or the optimized round trip time consumption change size can also express the performance of the wireless network, when the round trip time consumption or the optimized round trip time consumption change is not small, the fluctuation of the wireless network is not small, and the treatment can be performed to the randomly generated condition in the wireless network through testing the round trip time consumption and the optimized round trip time consumption change performance.

The third information message is transmitted to indicate that the sudden urgent condition is detected, and the microcontroller can transmit information to the monitoring platform through the third information message, so that the microcontroller can adjust the method for transmitting the first information message, can receive the information transmitted by the monitoring platform and adjust the mode for transmitting the first information message.

when the message is lost, the microcontroller transmits the information message four with the unachieved mark to inform the monitoring platform transmitting the information message one, and in addition, the microcontroller can also receive the information message four with the unachieved mark transmitted by the monitoring platform or the message is lost when the monitoring platform receives the information message one transmitted by the monitoring platform.

During the image information transmission of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, the monitoring platform receives the image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, and the microcontroller transmits the image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower; under the condition, the image information of construction sites of all steps in the method for the lower tower column tension and compression structure of the cable tower of the transmitted information message two is not much, so that the obtained structure is not accurate enough when the method for evaluating the wireless network performance through the information message two is used, the message loss is detected, and the microcontroller for notifying the transmitted information message one through the transmitted information message four is used for transmitting the lost information message again.

The method for pulling and pressing the lower tower column of the cable tower can allow a certain percentage of image information packets of the construction site of each step to be lost, so that the image information packets can not be transmitted again under the condition that a plurality of information messages are not lost, and then the image information transmission of the construction site of each step in the method for pulling and pressing the lower tower column of the cable tower is executed, so that the transmission performance is guaranteed.

the transmission bandwidth changing unit adjusts the bandwidth size of the first information message, and can execute adjustment according to the evaluated wireless network performance; during image information transmission of a construction site of each step in the method for pulling and pressing the lower tower column of the cable tower, the microcontroller continuously transmits an information message I and receives an information message II, the repeated time consumption and the optimized repeated time consumption are continuously derived, and after the performance of a wireless network is evaluated based on the repeated time consumption and the optimized repeated time consumption, the size of a bandwidth for transmitting the information message I is adjusted; the bandwidth size is reduced when the round trip time or the optimized round trip time is increased, and the bandwidth size is increased when the round trip time or the optimized round trip time is decreased, so that the adjustment can be performed when the information packet III is received, and the adjustment needs to be performed at high speed in response to the change, which indicates that no small change has occurred in the wireless network when the information packet III is received.

The method for adjusting the bandwidth for transmitting the first information message by the transmission bandwidth varying unit comprises the following steps:

increasing the bandwidth by means of a preset increase index, namely increasing the transmission speed of the proportional control information in the same proportion to increase the bandwidth; or the bandwidth size is reduced by means of a preset reduction index, namely the size of the reduced proportional control information transmission speed is reduced in the same proportion.

under the condition of poor wireless network performance, when the information interaction between the microcontroller and the monitoring platform cannot be carried out due to the problem of message loss, the current information link is terminated by transmitting an information message V with a termination identifier;

When the wireless network performance is very problematic, and the information interaction cannot be continued, the information link between the microcontroller and the monitoring platform is set again, so that the information interaction is continued.

Therefore, the acquired image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower can be transmitted to the microcontroller through the camera, and then the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower is transmitted to the monitoring platform through the wireless module, so that the microcontroller transmits the image information of the construction site of each step in the method for pulling and pressing the lower tower column structure of the cable tower to the monitoring platform;

a-1: transmitting a first information message to the monitoring platform;

the method for adjusting the size of the bandwidth for transmitting the first information message according to the evaluated wireless network performance is the method executed by the transmission bandwidth varying unit.

In this way, during the image information transmission of the construction site at each step in the method for the lower tower column tension and compression structure for the cable tower, the variation situation of the time consumption is tested, the wireless network performance is evaluated, the bandwidth control is performed on the transmission of the image information packet of the construction site at each step in the method for the lower tower column tension and compression structure for the cable tower, and the transmission performance of the image information transmission of the construction site at each step in the method for the lower tower column tension and compression structure for the cable tower is improved by blocking the transmission by evaluating the variation of the wireless network.

The present invention has been described in an illustrative manner by the embodiments, and it should be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, but is capable of various changes, modifications and substitutions without departing from the scope of the present invention.

Claims

1. A lower tower column tension and compression structure for a cable tower is characterized by comprising an active pull rod and a support rod which are arranged at the position of the lower tower column of the cable tower which is easy to deform.

2. The lower tower column tension and compression structure for the cable tower as claimed in claim 1, wherein during construction of the lower tower column of the cable tower, the bottom of the lower tower column of the cable tower is installed on the top surface of the bearing platform, the slope of the outer side surface of the lower tower column of the cable tower is 1/4.356, an auxiliary pull rod is arranged at a position 9m away from the top surface of the bearing platform in the tower column of the cable tower, the auxiliary pull rod is a pull rod formed by fes 15.2mm high-strength low-relaxation steel stranded wires, and all fes 15.2mm high-strength low-relaxation steel stranded wires are wrapped by a steel pipe.

3. The lower tower column tension and compression structure for the cable tower as claimed in claim 1, further comprising a support structure for construction of a lower cross beam of the cable tower, the support structure comprising a steel pipe structure and a steel section structure;

the support structure specifically includes:

the vertical column, the horizontal cross brace I, the longitudinal beam, the bailey frame, the cross beam, the distribution beam and the support bottom plate are fixedly connected from bottom to top in sequence.

4. The lower tower column tension-compression structure for the cable tower as claimed in claim 3, wherein the column is a phi 820 x 12mm steel pipe;

the first horizontal cross brace is a steel pipe with the diameter phi of 426 multiplied by 10 mm;

one end of the reinforced diagonal brace is fixedly connected to the bottom of the first horizontal cross brace, and the other end of the reinforced diagonal brace is fixedly connected to the side wall of the upright post; more than one second horizontal cross brace is fixedly connected to the upright posts below the horizontal cross braces, the number of the upright posts is a plurality, and a cross diagonal brace is fixedly connected between every two adjacent upright posts;

the longitudinal beam is I56b type I-shaped steel;

the cross beam comprises a plurality of I36b type I-shaped steels, and the distance between every two adjacent I36b type I-shaped steels is 1 m;

the I12.6 distribution beam with the distance of 0.7m comprises a plurality of 12.6# I-shaped steel, and the distance between every two adjacent 12.6# I-shaped steel is 0.7 m.

5. A method for a lower tower column tension and compression structure of a cable tower, comprising:

step 1: completing the construction of the bearing platform and the tower seat;

step 2: installing a first construction tower crane on the bearing platform, wherein the first construction tower crane is a C7022 tower crane;

sequentially pouring a first lower tower column segment serving as a first segment, a second lower tower column segment serving as a second segment and a third lower tower column segment serving as a third segment on the tower base from bottom to top by using a turnover method, so as to realize construction of a lower tower column, arranging an auxiliary pull rod at a position which is 9m away from the top surface of a bearing platform in a tower column 2 of the cable tower, wherein the auxiliary pull rod is a pull rod formed by phi s15.2mm high-strength low-relaxation steel stranded wires, and all phi s15.2mm high-strength low-relaxation steel stranded wires are wrapped by a steel pipe;

the constructor pours concrete into a first lower cross beam section serving as a fourth section and a second lower cross beam section serving as a fifth section from bottom to top on the support structure for constructing the lower cross beam of the cable tower, and additionally, a second construction tower crane is also installed on the bearing platform, wherein the second construction tower crane is an zsc1000 tower crane;

6. The method for the lower tower column tension-compression structure of a cable tower as claimed in claim 5, wherein the die-turnover method is a large block steel die-turnover method.

7. The method for the lower tower column tension and compression structure of the cable tower as claimed in claim 5, wherein a camera is arranged at the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, the camera is used for collecting image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower, the camera is connected with a microcontroller, the microcontroller is connected with a first wireless module, the first wireless module is connected with a monitoring platform in a wireless network, the monitoring platform is provided with a second wireless module, the microcontroller can be a single chip microcomputer or a PLC, the first wireless module and the second wireless module can be a 3G module or a 4G module, the wireless network can be a 3G network or a 4G network, and the monitoring platform can be a computer or a tablet computer; the microcontroller is connected with the FLASH memory.

8. The method for the lower tower column tension and compression structure of the pylon as recited in claim 5, wherein the FLASH memory stores therein: the system comprises an information transmission unit, a response receiving unit, a round trip time consumption derivation unit, an optimization round trip time consumption derivation unit, a wireless network performance estimation unit, a change performance test unit, a round trip time consumption mark transmission unit, a lost message detection unit, a transmission bandwidth change unit and a recovery link unit;

9. The method for the lower tower column tension and compression structure of the cable tower as claimed in claim 8, wherein the image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower is transmitted to the microcontroller via the camera, and the image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower is transmitted to the monitoring platform via the wireless module, thereby completing the transmission of the image information of the construction site of each step in the method for the lower tower column tension and compression structure of the cable tower to the monitoring platform by the microcontroller;

a-1: transmitting a first information message to the monitoring platform;