A continuous and rapid step-by-step jacking construction method

Abstract

This invention relates to a continuous and rapid step-by-step jacking construction method. This method achieves continuous jacking construction without beam drop using two standard jacks, and includes the following steps: 1) Jack A lifts the main beam from the initial position, while jack B prepares to return to the initial position; 2) Under the action of the horizontal thrust cylinder, the upper sliding structure of jack A moves forward along with the main beam; 3) Jack A falls, and jack B lifts the main beam from the initial position until the main beam is completely lifted by jack B, at which point jack A prepares to return to the initial position; 4) Under the action of the horizontal thrust cylinder, the upper sliding structure of jack B moves forward along with the main beam, returning to step 1). In each of the above steps, the controller collects and records key data within the jacking cycle in real time. Compared with existing technologies, this invention has the advantages of significantly accelerating construction speed.

Description

TECHNICAL FIELD

[0001] The present application relates to a walking incremental launching construction method, in particular to a continuous and fast walking incremental launching construction method. BACKGROUND

[0002] The walking incremental launching method is to synchronously lift and translate the main beam through multiple pairs of jacks, and to ensure the uniformity and reliability of the structure stress through the balance control technology of the jacks, which is suitable for the conditions that the bridge site has navigation or traffic demand, and cannot be densely supported or large construction machinery is accessed.

[0003] Compared with the traditional pulling or pushing incremental launching method, the walking incremental launching method can control the uniformity of the stress through multiple jacks, and is more suitable for projects with higher incremental launching accuracy.

[0004] The walking incremental launching jack is a special tool for lifting and displacement, and the displacement of railway, highway bridges or similar beam type heavy objects can be realized through the application of the product, and the displacement in the horizontal (X), vertical (Y) and vertical (Z) directions can be realized. The advantages are: large carrying capacity, multiple point configuration can adjust 100t-6000t heavy load components or equipment, and the carrying capacity can be adjusted according to the actual engineering needs; high adjustment precision, three-dimensional control of X / Y / Z three directions, and positioning accuracy of ≤1mm can be achieved. The equipment is easy to disassemble, and has good flexibility and mobility.

[0005] As shown in Figures 1-4 The single cycle construction steps of the conventional walking incremental launching method mainly include: opening the support lifting cylinder to make the support lifting cylinder rise synchronously until the main beam 1 is separated from the beam falling support pad 2; opening the horizontal pushing cylinder to make the main beam 1 and the upper sliding structure of the jack 4 move forward as a whole until the horizontal pushing cylinder completes a stroke; opening the lifting cylinder to make the main beam 1 and the upper sliding structure of the jack 4 move downward as a whole until the lifting cylinder is completely separated from the main beam 1; opening the horizontal pushing cylinder to make the upper sliding structure return to the initial position and start the next reciprocating stroke. In the above construction process, when the main beam has a vertical curve, the incremental launching height will change constantly, and the local stress of the main beam in the lifting stage can be actively controlled through the jacks, and the beam falling gap of each support pier needs to be controlled through the artificial copying of the pad steel plate to ensure the consistency of the beam falling of each support point, so as to indirectly control the beam falling reaction force. This incremental launching method has the following limitations:

[0006] 1. The key data of the beam falling, such as the beam falling support pad and the main beam gap value, the beam falling support pad and the main beam copying pad value, the reaction force of each support pier, and the reaction force of each support pad in each support pier are difficult to monitor, and only the related data can be obtained through the manual measurement of the gap and the pressure ring data, and the reliability, completeness and timeliness of the monitoring data are difficult to guarantee;

[0007] 2. In the actual beam lowering process, it is difficult to control the reaction force of each support. The measured reaction force is significantly different from the control reaction force during the jacking process. Furthermore, the reaction forces of the beam lowering pads on each support are severely uneven and lack regularity. The reaction force under a single support pad can easily exceed the set limit, which leads to certain construction risks.

[0008] 3. The construction speed of manual padding is relatively slow, especially when the main beam has a vertical curve or changes in height. 70% of the time in each jacking cycle needs to be spent on manual padding when lowering the beam. Moreover, when there are many supports, more construction personnel are required. Each support requires 1 to 2 people to be responsible for padding, making construction organization difficult.

[0009] To address the aforementioned technical problems, existing technologies disclose a step-by-step jacking method with varying heights, such as... Figures 5-9 As shown, the main steps include: pushing the steel beam to the height change point, then returning the jack to the 0 stroke position. After the jack lifts the steel beam for one stroke, a pad K1 is installed on the bottom of the beam outside the height change point of the wedge block 5. The beam is lowered, and the jack returns to the 0 stroke position. The above steps are repeated, with pads K1 being installed on the bottom of the beam outside the height change point of the wedge block. After the jack travels a certain distance, the bottom pad K1 is replaced with a short column Z3 on the first support point 7. The jack continues, gradually installing pads C10 and over-shield steel plates 9 above the jack distribution beam. After the height change section passes support point 2, pad K1 is removed, and a short column Z3 is installed on the second support point 8. After the height change section passes the second support point 8, the subsequent jacking continues. As can be seen from the above construction process, the construction process through the height change section is very complicated. The K1 pad needs to be welded or bolted to the main beam, while the short column Z3 needs to be welded to the support point below, requiring constant installation and removal. The above-mentioned step-by-step jacking construction method still has several limitations:

[0010] 1. The construction speed of the high-altitude section is very slow, which seriously affects the overall construction progress;

[0011] 2. The construction process requires the constant assembly and disassembly of temporary components, making the process very cumbersome, inconvenient, and difficult to organize on-site construction.

[0012] 3. Temporary components need to be constantly assembled and disassembled, and some temporary components need to be welded or bolted to the permanent structure, which causes some damage to the permanent structure. Summary of the Invention

[0013] The purpose of this invention is to overcome the defects of the prior art and provide a continuous and rapid step-by-step jacking construction method that can accelerate construction speed.

[0014] The objective of this invention can be achieved through the following technical solutions:

[0015] A continuous fast walking incremental launching construction method, which realizes continuous incremental launching construction without beam falling through two standard jacks, comprises the following steps:

[0016] 1) Jack A lifts the main beam at the starting position, and jack B is ready to return to the starting position;

[0017] 2) Under the action of the pushing cylinder, the upper slip structure of jack A moves forward with the main beam as a whole;

[0018] 3) Jack A falls, jack B lifts the main beam at the starting position until the main beam is completely lifted by jack B, and jack A is ready to return to the starting position;

[0019] 4) Under the action of the pushing cylinder, the upper slip structure of jack B moves forward with the main beam as a whole, returning to step 1);

[0020] In each of the above steps, the controller collects and records key data in the incremental launching cycle in real time.

[0021] Further, when the pushing cylinder of one standard jack completes a stroke, the other standard jack returns to prepare for lifting.

[0022] Further, the lifting of the standard jack is realized through the lifting cylinder.

[0023] Further, the method further comprises:

[0024] When a certain standard jack is pushed to the variable height point of the main beam, at least one sliding pad is arranged above the standard jack to complete the pier passing, and the sliding pad is slidingly arranged at the bottom of the main beam.

[0025] Further, during the pushing process of the standard jack, the sliding pad above the standard jack is replaced during the pushing process.

[0026] Further, the sliding pad comprises two steel pad bodies with pulley assemblies, and the two steel pad bodies are connected through a transverse connection, and the main beam is provided with a pulley track for placing the pulley assembly.

[0027] Further, the pulley assembly comprises a pulley and an ear plate, the ear plate is vertically installed on the steel pad body and connected with the pulley through a pulley shaft, and the pulley is placed on the pulley track.

[0028] Further, the transverse connection is a telescopic transverse connection.

[0029] Further, the transverse connection comprises a nested steel pipe connector connected between the two steel pad bodies and a support arranged between adjacent nested steel pipe connectors.

[0030] Further, the key data includes a jacking displacement amount, a gap value between the main beam after jacking, a gap value between the main beam after planing, a jacking jack reading, and a pressure ring reading.

[0031] Compared with the prior art, the application has the following beneficial effects:

[0032] 1. Compared with the traditional construction method, the application cancels the beam landing cushion, adds a set of jacking equipment, and places two sets of jacking equipment on one pier, alternately jacks, and no longer follows the traditional "one up and one down" mode, skips the beam landing stage, greatly speeds up the construction speed. The construction method of the application cancels the beam landing cushion process, so that the jacking construction will not be interrupted due to the beam landing cushion, the construction speed is greatly improved, the construction period is saved, and the labor cost is saved.

[0033] 2. The application is suitable for the construction of variable height beams through the setting of sliding pads, and the sliding pads are convenient to install and remove and have little effect on the main beam. When used, the sliding pads only need to be placed on the lower flange of the main beam through the lug plate and the pulley, without the need for continuous welding and removal with the main beam as the traditional temporary pad.

[0034] 3. The sliding pads of the application are suitable for the construction of variable width beams through telescopic transverse connection.

[0035] 4. The sliding pads of the application are convenient to use and only need to be slid by manpower, without the need for construction machinery such as forklifts and cranes for installation and removal as the traditional temporary pad.

[0036] 5. The application can record the key data in the jacking cycle, analyze the consistency of the measured reaction force and the theoretical calculation according to the jacking data, strictly control the external force on the main beam in the entire jacking cycle, and ensure that the jacking and beam landing control reaction force is within the corresponding monitoring and early warning value through the implementation of the operation process

[0037] 4. The application can greatly speed up the construction speed of the variable height and width beam walking jacking construction, especially when passing through the temporary pier multiple times without repeated installation and removal, and can be used repeatedly after one-time installation. DETAILED DESCRIPTION

[0038] Figure 1 It is a lifting step schematic diagram of the conventional walking jacking method single cycle construction;

[0039] Figure 2 It is a planing step schematic diagram of the conventional walking jacking method single cycle construction;

[0040] Figure 3 It is a beam landing step schematic diagram of the conventional walking jacking method single cycle construction;

[0041] Figure 4 The single cycle construction return step schematic view of the conventional step-by-step incremental launching method;

[0042] Figure 5 The step-by-step incremental launching return schematic view of the conventional step-by-step incremental launching method over the variable height section construction;

[0043] Figure 6 The schematic view of installing the cushion block K1 of the conventional step-by-step incremental launching method over the variable height section construction;

[0044] Figure 7 The schematic view of gradually installing the cushion block K1 of the conventional step-by-step incremental launching method over the variable height section construction;

[0045] Figure 8 The schematic view of replacing the first support point short column Z3 of the conventional step-by-step incremental launching method over the variable height section construction;

[0046] Figure 9 The schematic view of installing the C cushion block and the super cushion steel plate of the conventional step-by-step incremental launching method over the variable height section construction;

[0047] Figure 10 The schematic view of installing the second support point short column Z3 of the conventional step-by-step incremental launching method over the variable height section construction;

[0048] Figure 11 The schematic view of the variable height section passing the second support point of the conventional step-by-step incremental launching method over the variable height section construction;

[0049] Figure 12 The schematic view of the continuous and rapid step-by-step incremental launching construction under the equal height and width beam of the application;

[0050] Figure 13 The schematic view of the jack A jacking of the continuous and rapid step-by-step incremental launching construction under the equal height and width beam of the application;

[0051] Figure 14 The schematic view of the two jacking conversion of the continuous and rapid step-by-step incremental launching construction under the equal height and width beam of the application;

[0052] Figure 15 The schematic view of the jack B jacking and the jack A return of the continuous and rapid step-by-step incremental launching construction under the equal height and width beam of the application;

[0053] Figure 16 The schematic view of the jack B forward movement of the continuous and rapid step-by-step incremental launching construction under the variable height and width beam of the application;

[0054] Figure 17 The schematic view of the continuous and rapid step-by-step incremental launching construction under the variable height and width beam of the application to the variable height point;

[0055] Figure 18The movement schematic diagram of the sliding pad under the continuous and fast step-by-step top pushing construction of the variable height and variable width beam of the present application;

[0056] Figure 19 The movement schematic diagram of the sliding pad under the continuous and fast step-by-step top pushing construction of the variable height and variable width beam of the present application;

[0057] Figure 20 The movement schematic diagram of the sliding pad above the jack A and the jack B under the continuous and fast step-by-step top pushing construction of the equal height and equal width beam of the present application;

[0058] Figure 21 The plane schematic diagram of the sliding pad of the present application;

[0059] Figure 22 The cross section schematic diagram of the sliding pad of the present application;

[0060] Figure 23 The elevation schematic diagram of the sliding pad of the present application;

[0061] Figure 24 The placement schematic diagram of the sliding pad of the present application on the narrow beam;

[0062] Figure 25 The placement schematic diagram of the sliding pad of the present application on the wide beam;

[0063] 1, main beam, 2, beam falling support pad, 3, temporary pier, 4, jack, 5, wedge-shaped block, 6, distribution beam, 7, first supporting point, 8, second supporting point, 9, super pad steel plate, 10, C pad, A, jack, B, jack, 11-14, sliding pad, 101, pad body, 102, transverse connection, 103, pulley, 104, lug plate, 105, pulley shaft hole, 106, rubber pad, 107, first steel pipe, 108, second steel pipe, 109, support. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0065] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0066] It should be noted that like reference numerals and characters refer to like elements throughout the following figures and description, and thus, once certain terminologies are defined in one figure, they do not need to be further defined and explained in the subsequent figures.

[0067] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0068] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0069] Embodiment 1

[0070] The embodiment provides a continuous fast walking type pushing construction method, which realizes continuous pushing construction without beam falling through two standard jacks, i.e., jack A and jack B, as shown in the drawing, including the following steps: Figure 12

[0071] 1) Jack A lifts the main beam 1 at the starting position, and jack B is ready to return to the starting position, as shown in the drawing, and the lifting of the standard jack is realized through the lifting oil cylinder; Figure 13

[0072] 2) Under the action of the pushing oil cylinder, the upper sliding structure of jack A moves forward with the main beam as a whole, the pushing oil cylinder completes one stroke, jack B is ready to be lifted, as shown in the drawing; Figure 14

[0073] 3) Jack A falls, jack B lifts the main beam at the starting position, until the main beam is completely lifted by jack B, and jack A is ready to return to the starting position, as shown in the drawing; Figure 15

[0074] 4) Under the action of the pushing oil cylinder, the upper sliding structure of jack B moves forward with the main beam as a whole, the pushing oil cylinder completes one stroke, jack A is ready to be lifted, and returns to step 1), as shown in the drawing;​​​​Figure 16 As shown.

[0075] In the construction method, the jacks A and B are alternately advanced, and instead of the traditional "rise and fall together" mode, a continuous and uninterrupted jacking mode is adopted, so that the smoothness of construction can be improved, and the construction interruption caused by the lifting of the cushion can be avoided, and the construction quality and speed can be improved.

[0076] In the above steps, the controller collects and records the key data in the jacking cycle in real time, and the key data includes the jacking displacement, the gap value between the jacks and the main beam after jacking, the gap value between the jacks and the main beam after moving to the position, the reading of the jacks and the pressure ring, etc. According to the jacking data, the consistency of the measured reaction force and the theoretical calculation can be analyzed, and at the same time, the external force acting on the main beam in the entire jacking cycle can be strictly controlled. Through the implementation of the operation process, it is ensured that the jacking and beam lowering control reaction force is within the corresponding monitoring and early warning value.

[0077] Example 2

[0078] The embodiment provides a continuous and rapid walking type jacking construction method, which is different from example 1 in that it can be applied to the construction of variable height section beams, such asAs shown, the detailed construction process of the variable height section is as follows: Figures 17-20

[0079] Step one: jacking the steel beam to the variable height point, and placing the sliding cushion block, as shown in Figure 17

[0080] Step two: when the jack B passes through the variable height position, slide the sliding cushion block 11 to the upper side of the jack B, as shown in Figure 18

[0081] Step three: continue to jacking, and slide the sliding cushion block 42 to the upper side of the jack B, as shown in Figure 19

[0082] Step four: when the jack A passes through the variable height position, slide the sliding cushion block 11 and the sliding cushion block 12 to the upper side of the jack A according to the processes of step two and step three, and slide the sliding cushion block 13 and the sliding cushion block 14 to the upper side of the jack B, as shown in Figure 20

[0083] In the specific embodiment, as shown in Figures 21-23 ​​​​As shown in the drawings, each sliding pad includes two steel pad bodies 101 with pulley assemblies, the two steel pad bodies 101 are connected by a transverse connection 102, and the main beam 1 is provided with pulley tracks on both sides for placing the pulley assemblies. Specifically, the pulley assembly includes a pulley 103 and an ear plate 104, the ear plate 104 is vertically installed on the steel pad body 101, the ear plate 104 is provided with a pulley shaft hole 105, and the pulley 103 is placed on the pulley track and connected with the pulley shaft, so as to achieve flexible sliding along the longitudinal direction of the main beam during pushing.

[0084] In the preferred embodiment, the steel pad body 101 is also provided with a rubber pad 106 at the contact position with the main beam 1, and the rubber pad 106 is bonded to the steel pad body 101 by an adhesive. The rubber pad 106 can ensure uniform local stress of the main beam during longitudinal pushing of the main beam, so as to make the construction process safer.

[0085] In another embodiment, the transverse connection 102 is provided as a telescopic transverse connection, so that it can be applied not only to the equal-width beam, but also to the variable-width beam, such as Figure 24 and Figure 25 as shown.

[0086] In the specific embodiment, referring to Figure 21 as shown, the telescopic transverse connection includes nested steel pipe connectors connected between the two steel pad bodies 101 and support members 109 arranged between adjacent nested steel pipe connectors, the nested steel pipe connectors are connected by nesting of a first steel pipe 107 and a second steel pipe 108 with different diameters to achieve telescopic purpose, and are fixed by the support members 109.

[0087] The above describes the preferred embodiments of the present application in detail. It should be understood that those skilled in the art can make many modifications and changes without creative labor based on the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A continuous fast-walking incremental launching construction method, characterized in that, The method realizes the continuous pushing construction without beam falling by two standard jacks, in which at least one sliding pad is arranged above the standard jack when the standard jack is pushed to the variable height point of the main beam to complete the pier passing, and the sliding pad is slidingly arranged at the bottom of the main beam; During the flat pushing process of the standard jack, the sliding pad above the standard jack is replaced by sliding during the flat pushing process; the sliding pad comprises two steel pad bodies with pulley assemblies, and the two steel pad bodies are connected by a transverse connection, and the main beam is provided with a pulley track for placing the pulley assembly on both sides; The pulley assembly comprises a pulley and an ear plate, the ear plate is vertically installed on the steel pad body and connected with the pulley through a pulley shaft, and the pulley is placed on the pulley track; The transverse connection is a telescopic transverse connection, and the transverse connection comprises nested steel pipe connectors connected between the two steel pad bodies and support members arranged between adjacent nested steel pipe connectors; the standard jack is a jack A and a jack B; The pushing construction method comprises the following steps: 1) the jack A lifts the main beam at the starting position, and the jack B is ready to return to the starting position; 2) under the action of the flat pushing cylinder, the upper sliding structure of the jack A moves forward with the main beam as a whole; 3) the jack A falls, the jack B lifts the main beam at the starting position until the main beam is entirely lifted by the jack B, and the jack A is ready to return to the starting position; 4) under the action of the flat pushing cylinder, the upper sliding structure of the jack B moves forward with the main beam as a whole, and returns to step 1); In each step, the controller collects and records the key data in the pushing cycle in real time.

2. The continuous rapid walking top push construction method according to claim 1, characterized in that, When the flat pushing cylinder of one standard jack completes one stroke, the other standard jack returns to the starting position and is ready to lift.

3. The continuous rapid walking top push construction method according to claim 1, characterized in that, The lifting of the standard jack is realized by a lifting cylinder.

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