CN111535158A - Temporary buttress for installing box girder pushing equipment and construction method thereof - Google Patents
Temporary buttress for installing box girder pushing equipment and construction method thereof Download PDFInfo
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- CN111535158A CN111535158A CN202010405591.6A CN202010405591A CN111535158A CN 111535158 A CN111535158 A CN 111535158A CN 202010405591 A CN202010405591 A CN 202010405591A CN 111535158 A CN111535158 A CN 111535158A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
A temporary buttress for installing box girder jacking equipment and a construction method thereof are provided, wherein steel pipe piles at the installation position of the box girder jacking equipment are driven in a matrix distribution mode, the parts of the steel pipe piles exposed out of the ground or the water surface of the installation position are mutually connected through a plurality of layers of horizontal supporting pipes, the joints of the upper horizontal supporting pipes and the lower horizontal supporting pipes and the steel pipe piles are connected through inclined supporting pipes, pile caps are arranged at the tops of the steel pipe piles, distribution beams are fixedly arranged on the pile caps arranged in the transverse direction or the longitudinal direction of each row, the end parts of the distribution beams in each row are connected through connecting beams, and a track beam is arranged in the middle of the distribution beams in each row, so that the temporary buttress for installing the box girder jacking equipment is formed. The temporary buttress structure has clear structural hierarchy, novel and unique design thought, high structural strength, strong bearing capacity, difficult deformation, convenient and simple manufacture and use, good practicability, operability, expansibility and safety, and can well solve the problem of box girder pushing operation in road bridge construction, thereby having great popularization and application values.
Description
Technical Field
The invention relates to a buttress and a construction method thereof, in particular to a temporary buttress for installing box girder jacking equipment and a construction method thereof, belonging to the technical field of road and bridge construction facilities and construction methods thereof.
Background
The box girder is one of the roof beam in the road and bridge engineering, can be of a full steel structure, also can be made of reinforced concrete, usually includes roof, bottom plate, web and flange board, and some still include the baffle, and the roof passes through the web with the bottom plate and is connected the inside box that is hollow that constitutes, and the flange board sets up the both sides at the box roof, and the box girder is called from this.
The box girder has better strength and spanning capability, so the box girder is widely applied to the construction of road and bridge engineering.
The pushing construction is one of the box girder erection methods.
The box girder erection by the pushing method is to make a section of box girder travel to the other end of the road bridge from one end of the road bridge by jacking and forward pushing through pushing equipment erected on the temporary buttress, and the process is repeated until all sections of box girders are pushed and erected.
When the box girder is erected by adopting a jacking method, the cantilever bending moment when the front end of the box girder passes over the temporary buttress cannot be too large, otherwise, a guide beam and the temporary buttress are added at the cantilever end to reduce the midspan bending moment.
The temporary buttress bears the whole weight and larger horizontal thrust generated when the box girder is pushed, so that the requirements on the bearing capacity and rigidity of the temporary buttress are high when the box girder is erected by adopting a pushing method.
Conventional thrusting apparatus temporary piers generally include a temporary pier built on the ground and a temporary pier built on the water surface.
The method of constructing temporary piers on the ground generally comprises: leveling and compacting the field, placing a platform thick steel plate on the leveled and compacted ground to serve as a temporary buttress foundation, and then erecting a temporary buttress on the platform steel plate.
The method of constructing temporary piers on the water generally comprises: and (4) driving a steel pipe pile as a bearing foundation by using the floating crane ship, and welding the steel pipe pile to build a temporary buttress.
The above conventional temporary pier construction method has the following disadvantages:
1) the temporary buttress which is used for placing a thick steel plate on the ground as a bearing foundation has high bearing capacity requirement on the original ground, so that even if the original ground is hardened, the uneven settlement deformation of the temporary buttress is difficult to avoid; in addition, when the temporary buttress bears larger horizontal thrust, the type of jig frame is easy to slide and incline, and the safety of box girder pushing construction and linear control of the pushing process are influenced;
2) for the temporary buttress taking the steel pipe pile as the bearing foundation on the water surface, the geological condition of the steel pipe pile foundation is often worse, because a large amount of silt and soft soil exist in the water, the bearing capacity is poor, and the steel pipe pile can also be influenced by the impact of water flow at any time, when the temporary buttress is subjected to the dual action of gravity and horizontal thrust generated when the box girder at the upper part pushes away, if the bearing capacity and the bending resistance of the steel pipe pile foundation are insufficient, the temporary buttress is easy to subside and deform and incline in the water, and great safety quality accidents are caused.
Therefore, the provision of the safe and economic temporary buttress which can ensure that the pushing equipment completes box girder pushing and the safe, economic and rapid completion of the construction of the temporary buttress for the pushing equipment is a key to whether box girder pushing operation can be completed as expected in the construction of road and bridge engineering and is one of the difficulties in the whole road and bridge construction engineering.
In the prior art, the pushing method of the box girder and related facilities and equipment have a plurality of valuable technical schemes, and some related information can be known from the following searched data, such as:
the invention discloses a method for installing a temporary buttress top beam section of a large-span steel box girder cable-stayed bridge (application number: 200910058479.3), which comprises the following construction steps: (1) the construction method comprises the following steps of (1) construction of a steel box girder section of a core side close to a temporary pier top core side steel box girder section, (2) construction of other sections of the temporary pier except for a top section, (3) hoisting of the temporary pier top core side steel box girder section, (4) hoisting of the top section of the temporary pier, and completion of construction of the temporary pier, (5) hoisting of the temporary pier top bank side steel box girder section, and (6) construction of the steel box girder section of the bank side close to the temporary pier top bank side steel box girder section.
It can be seen that the patent provides a corresponding installation method for the temporary buttress top beam section of the large-span steel box girder cable-stayed bridge, but does not relate to the structural composition of the temporary buttress.
The invention discloses a walking type multi-point pushing construction method (application number: 201210042810.4), which is provided with a pushing device integrating jacking, translation and transverse adjustment into a whole to finish the movement or adjustment of a steel box girder along the bridge direction, the transverse bridge direction and the vertical direction; the two steps of jacking and pushing are alternately carried out, so that the integral steel box girder is supported and then is supported forwards; and then, placing the steel box girder on the temporary pier structure to finish a pushing process, then retracting the bottom of a pushing cylinder in a pushing device to perform next pushing operation, and completing pushing construction by circulation.
The patent application provides the structural composition of the pushing equipment, but does not relate to the structural composition and the construction method of a temporary buttress below the pushing equipment;
the invention discloses a walking type multi-point pushing construction method and a construction system for a steel box girder, which are disclosed by the patent application number 201210084790.7, and is an improved optimization scheme aiming at the defects of a dragging type pushing mode, namely, pushing devices are arranged at multiple points of an assembling platform, each temporary pier, a main pier and the like, a vertical jack is used for integrally jacking the steel box girder to separate the steel box girder from a girder falling frame, then a pushing jack is used for pushing a longitudinal bridge for a stroke, then the steel box girder is placed to the girder falling frame, then the pushing jack is retracted to prepare for pushing of the next stroke, the operation is circulated until the steel box girder is installed, but the structural composition and the installation method of the temporary pier below the pushing device are not described in the whole patent.
According to the invention patent application (application number: 201410206519.5), a steel box girder assembly platform with the height substantially equal to that of a pier is arranged at one end or two ends of a bridge site, temporary piers are arranged in the platform and along the advancing direction of the bridge, and guide girders are designed at the front ends of the steel girders.
The patent application of the invention is a walking type pushing construction method, and a concrete structure and a construction method of a temporary buttress below a pushing device are not provided.
From the above retrieved data, it can be seen that:
although the incremental launching method of the box girder and related facility equipment in the prior art have a plurality of valuable technical schemes, no clear solution or direct method inspiration is given in the aspects of how to provide a temporary buttress for installing incremental launching equipment, which has strong bearing capacity, small deformation in the using process, safety and economy, and safely, economically and quickly finish the construction of the temporary buttress for installing the incremental launching equipment, ensuring the quality and quantity guarantee of the box girder incremental launching operation in the road and bridge construction to be finished on time and solving the difficult problems in the road and bridge construction.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a temporary buttress for installing box girder jacking equipment and a construction method thereof, and aims to provide a temporary buttress for installing box girder jacking equipment, which comprises the following steps:
the temporary support pier for the pushing equipment installation is strong in bearing capacity, small in deformation in the using process, safe and economical, construction of the temporary support pier for the pushing equipment installation is completed safely, economically and rapidly, quality guarantee and quantity guarantee of box girder pushing operation in road and bridge construction are guaranteed to be completed on time, and the problem in the road and bridge construction is solved.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the utility model provides a case roof beam pushes away equipment fixing with interim buttress which characterized in that includes:
the device comprises a steel pipe pile, a horizontal supporting pipe, an oblique supporting pipe, a pile cap, a distribution beam, a connecting beam and a track beam;
the steel pipe piles are driven into the mounting positions of the box girder pushing equipment in a matrix distribution mode, the parts of the steel pipe piles, which are exposed out of the ground or the water surface of the mounting positions, are mutually connected and fixed through a plurality of layers of horizontal supporting pipes, and the connecting positions of the upper layer of horizontal supporting pipes and the lower layer of horizontal supporting pipes and the steel pipe piles are connected through the inclined supporting pipes;
the pile caps are arranged at the tops of the steel pipe piles, each row of pile caps which are arranged transversely or longitudinally is fixedly provided with a distribution beam, the end parts of the distribution beams of each row are fixedly connected through the connecting beams, and the distribution beams and the connecting beams form a buttress platform framework;
the track beam is arranged in the middle of each row of distribution beams and used for accommodating the box beam pushing equipment.
Furthermore, the distance between the pipe walls of the steel pipe piles distributed in the form of a matrix is 2.5-3.5 meters.
Furthermore, the pile cap is formed by connecting a top plate and vertical stiffening plates distributed in a grid shape at the bottom of the top plate.
Furthermore, the distribution beam and the track beam are box-type structural members formed by splicing H-shaped steel and welding flanges of the H-shaped steel together.
Further:
a platform floor is arranged on the surface of the distribution beam in the buttress platform frame;
the periphery of the buttress platform frame is provided with edge-facing protective railings;
and a vertical ladder used for operators to climb up and down is arranged between the outer side of the steel pipe pile matrix and the buttress platform frame.
The construction method of the temporary buttress for installing the box girder pushing equipment is characterized by comprising the following steps of:
s10) according to the geological condition obtained by detection, driving steel pipe piles in a matrix distribution mode in an area where temporary buttresses for installing box girder pushing equipment need to be built, wherein the specific number, the driving depth and the distance among the steel pipe piles are based on the box girder pushing equipment which needs to be borne by the temporary buttresses for installing the box girder pushing equipment and the sum of loads which need to be borne by the box girder pushing equipment and the box girder pushing equipment during working and safety guarantee coefficients which need to be reserved;
s20) selecting one steel pipe pile with the largest stress in each row of steel pipe piles in the steel pipe pile matrix to carry out bearing capacity test, if the test result meets the design standard, carrying out the operation step of the next procedure, if the test result does not meet the design standard, carrying out pile supplement or increasing the driving depth of the steel pipe pile, then carrying out the bearing capacity test again, and repeating the steps until the bearing capacity test meets the design standard;
s30) determining the actual height of each steel pipe pile in the steel pipe pile matrix through a measuring instrument, and then installing and fixing pile caps at the tops of the steel pipe piles according to the design elevation requirement to enable the elevation of each pile cap to be consistent and accord with the design requirement;
s40) from the high position of each steel pipe pile, which is about 0.5m away from the ground or the water surface, the steel pipe piles are transversely connected by horizontal supporting pipes at certain intervals, so that the whole steel pipe pile matrix becomes a frame structure body which is composed of the steel pipe piles as longitudinal supporting columns and a plurality of layers of horizontal supporting pipes as transverse connecting rods;
s50) connecting the upper and lower layers of horizontal supporting tubes with the steel pipe piles through inclined supporting tubes to further enable the frame structure to be a truss structure;
s60) fixedly mounting a distribution beam on each row of transversely or longitudinally arranged pile caps in the steel pipe pile matrix, and fixedly connecting the end parts of the distribution beams in each row by using a connecting beam respectively to enable the distribution beams and the connecting beams to form a pier platform framework;
s70) installing a track beam for arranging the box girder pushing equipment in the middle of each row of the distribution beams, namely completing the construction of the temporary buttress for installing the box girder pushing equipment.
Further, the method also comprises the following steps between the steps of 60) and 70): s61) laying platform planks at the gaps among the pier platform frames.
Further, the method also comprises the following steps between the steps of 60) and 70): s62) erecting edge-facing protective railings around the buttress platform frame.
Further, the method also comprises the following steps between the steps of 60) and 70): s63) erecting a vertical ladder for operators to go up and down between the outer side of the steel pipe pile matrix and the buttress platform frame.
Further, in the step S20), the bearing capacity test is performed by using a pressure test block test method, and the used pressure test block is a sandbag pile load or a reaction frame.
Further, in step S30), the measuring instrument is a total station.
Compared with the prior art, the embodiment of the invention has the beneficial effects and obvious progress that:
1) the temporary buttress for installing the box girder pushing equipment provided by the embodiment of the invention is formed by driving steel pipe piles at the installation position of the box girder pushing equipment in a matrix distribution mode, mutually connecting and fixing the parts of the steel pipe piles exposed out of the ground or water surface at the installation position through a plurality of layers of horizontal supporting pipes, connecting the joints of the upper layer of horizontal supporting pipes and the lower layer of horizontal supporting pipes and the steel pipe piles through inclined supporting pipes, arranging pile caps at the tops of the steel pipe piles, fixedly arranging distribution beams on the pile caps arranged in the transverse direction or the longitudinal direction of each row, fixedly connecting the end parts of the distribution beams in each row through connecting beams, and arranging track beams in the middle parts of the distribution beams in each row;
2) the temporary buttress for installing the box girder pushing equipment provided by the embodiment of the invention comprises a basic support body formed by steel pipe piles distributed in a matrix form, a uniform frame structure body formed by connecting the steel pipe piles through horizontal supporting pipes, a truss structure body formed by connecting upper and lower horizontal supporting pipes through inclined supporting pipes and the steel pipe piles, and a buttress platform frame formed by connecting a distribution beam and a connecting beam, so that a track beam for installing the box girder pushing equipment is installed to form the temporary buttress for installing the box girder pushing equipment, the structure is integrated, the frame structure and the truss structure have strong bearing capacity and small deformation rigidity, and the temporary buttress has the flexibility of a steel structure material, can bear the gravity of the box girder pushing equipment and the huge pushing force generated during the operation of the box girder pushing equipment, and can be used for installing the temporary buttress The unbalanced gravity generated when the box girder moves effectively prevents the box girder from settling and inclining the temporary buttress in the pushing construction;
3) the temporary buttress for installing the box girder pushing equipment provided by the embodiment of the invention has the advantages of clear structural hierarchy, novel and unique design thought, high structural strength, strong bearing capacity, difficulty in deformation, convenience and simplicity in manufacturing and use, strong practicability, good operability, expansibility and safety, capability of ensuring that the quality guarantee amount of box girder pushing operation in road and bridge construction is completed on time, and capability of well solving the difficult problem in road and bridge construction, so that the temporary buttress has great popularization and application values.
Drawings
To more clearly illustrate the technical solution of the present invention, the drawings required for the embodiment of the present invention will be briefly described below.
It should be apparent that the drawings in the following description are only drawings of some embodiments of the invention, and that other drawings can be obtained by those skilled in the art without inventive exercise, and the other drawings also belong to the drawings required by the embodiments of the invention.
Fig. 1 is a schematic structural view of a temporary buttress for installing box girder jacking equipment according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pile cap in a temporary buttress for installing box girder jacking equipment according to an embodiment of the present invention;
fig. 3 is a schematic working diagram of a temporary buttress for installing box girder jacking equipment according to an embodiment of the present invention.
In the figure:
11-steel pipe piles, 12-horizontal supporting pipes, 13-inclined supporting pipes, 14-pile caps, 141-top plates, 142-vertical stiffening plates, 15-distribution beams, 16-connecting beams, 17-track beams, 18-edge protection railings and 19-vertical ladders;
20-box girder pushing equipment;
30-box girder.
Detailed Description
In order to make the objects, technical solutions, advantages and significant progress of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings provided in the embodiments of the present invention, and it is obvious that all of the described embodiments are only some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the accompanying drawings of the embodiments of the present invention are used for distinguishing different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
It is to be understood that in the description of the embodiments of the present invention, the use of the terms orientation or position, which are used in the description of the embodiments of the present invention, are only based on the orientation or position shown in the drawings of the embodiments of the present invention, and are used for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element in question must have a specific orientation, a specific orientation configuration and operation, and therefore, should not be taken as limiting the invention.
In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and may be, for example, a fixed connection by welding or riveting, a detachable connection or a movable connection, or an integral body; either directly or indirectly through intervening media, intangible signal, or even optical, communication between two elements, or an interaction between two elements, unless expressly limited otherwise.
The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be further noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
The technical means of the present invention will be described in detail below with specific examples.
Example one
The embodiment provides a box girder pushes away equipment fixing with interim buttress.
As shown in fig. 1, a schematic structural diagram of a temporary buttress for installing box girder jacking equipment provided by an embodiment of the present invention is as follows:
the utility model provides a case roof beam pushes away equipment fixing with interim buttress, includes:
the steel pipe pile comprises a steel pipe pile 11, a horizontal support pipe 12, an inclined support pipe 13, a pile cap 14, a distribution beam 15, a connecting beam 16 and a track beam 17;
the steel pipe piles 11 are driven into the mounting positions of the box girder pushing equipment 20 in a matrix distribution mode, the parts of the steel pipe piles 11, which are exposed out of the ground or the water surface of the mounting positions, are mutually connected and fixed through a plurality of layers of horizontal supporting pipes 12, and the connecting positions of the upper layer of horizontal supporting pipe 12 and the lower layer of horizontal supporting pipe 12 and the steel pipe piles 11 are connected through inclined supporting pipes 13;
the pile caps 14 are arranged at the tops of the steel pipe piles 11, each row of pile caps 14 which are arranged transversely or longitudinally is fixedly provided with a distribution beam 15, the end parts of the distribution beams 15 are fixedly connected through a connecting beam 16, and the distribution beams 15 and the connecting beams 16 form a buttress platform framework;
a track beam 17 is arranged in the middle of each row of distribution beams 15 for accommodating a box beam jacking device 20.
From the above description it can be seen that:
firstly, the temporary buttress for installing the box girder pushing equipment provided by the embodiment is constructed by driving steel pipe piles at the installation position of the box girder pushing equipment in a matrix distribution mode, mutually connecting and fixing the parts of the steel pipe piles exposed out of the ground or water surface at the installation position through a plurality of layers of horizontal supporting pipes, connecting the joints of the upper and lower layers of horizontal supporting pipes and the steel pipe piles through inclined supporting pipes, arranging pile caps at the tops of the steel pipe piles, fixedly arranging distribution beams on the pile caps arranged in the transverse or longitudinal direction of each row, fixedly connecting the end parts of the distribution beams in each row through connecting beams, and arranging track beams in the middle parts of the distribution beams in each row;
secondly, the temporary buttress for installing the box girder pushing equipment provided by the embodiment is characterized in that the basic support body is formed by the steel pipe piles distributed in a matrix form, the steel pipe piles are connected through the horizontal supporting pipes to form a unified frame structure, the upper and lower horizontal supporting pipes are further connected with the joints of the steel pipe piles through the inclined supporting pipes to form a truss structure, and a buttress platform frame formed by connecting the distribution beam and the connecting beams is connected and fixed on the truss structure, so that the track beam for installing the box girder pushing equipment is installed to form the temporary buttress for installing the box girder pushing equipment, and the temporary buttress has a unified structure which has strong bearing capacity and small deformation of the frame structure and the truss structure, has the flexibility of a steel structure material, and can bear the gravity of the box girder pushing equipment and the huge pushing force generated during the operation of the box girder pushing equipment and the equipment, The unbalanced gravity generated when the box girder moves effectively prevents the box girder from pushing the settlement and the inclination of the temporary buttress in construction.
In this embodiment, according to the geological condition and the load to be borne by the temporary buttress, the number of the steel pipe piles arranged in the longitudinal direction may be greater than the number of the steel pipe piles arranged in the transverse direction, or the number of the steel pipe piles arranged in the transverse direction may be greater than the number of the steel pipe piles arranged in the longitudinal direction, or the number of the steel pipe piles arranged in the transverse direction is equal to the number of the steel pipe piles.
In the box girder jacking process, the temporary buttress not only bears the gravity transmitted by the box girder jacking equipment and the box girder from the upper part, but also bears the horizontal thrust generated in the box girder advancing direction, so that the number of the steel pipe piles arranged in the box girder advancing direction is larger than that of the steel pipe piles in the transverse direction, the longitudinal distance and the transverse distance between the steel pipe piles can be the same, the common distance is controlled to be 2.5-3.5 meters, preferably 3 meters, but the temporary buttress is not limited to 3 meters in actual operation, and the specification, the transverse distance, the longitudinal distance, the steel pipe pile soil penetration depth and the like of the steel pipe piles are determined by design calculation according to actual needs.
In the embodiment, the specification of the steel pipe piles is Q235 round pipes, the specification is D820 x 10, 4 rows are arranged longitudinally, 3 rows are arranged transversely, the transverse and longitudinal intervals among the steel pipe piles are 3m, the soil penetration depth of the steel pipe piles is 28m, and the ground exposure or horizontal height of the steel pipe piles is determined by the pushing height of the box girder.
As shown in fig. 2, a schematic structural diagram of a pile cap in a temporary buttress for installing a box girder jacking device according to an embodiment of the present invention is shown:
in this embodiment, the pile cap 14 is formed by connecting a top plate 141 and vertical stiffening plates 142 distributed in a grid shape at the bottom of the top plate 141.
The pile caps 14 and the steel pipe piles 11 can be connected together by welding, and the pile caps 14 are arranged to adjust the difference between the tops and the elevations of the steel pipe piles 11 by means of the pile caps 14, so that the elevations of the tops of all the steel pipe piles 11 are consistent, and to reliably transfer the loads transferred from the tops to the steel pipe piles 11 by means of the pile caps 14 without causing deformation of the tops of the steel pipe piles 11.
The distribution beam 15 and the track beam 17 are box-type structural members formed by splicing H-shaped steel and welding flanges of the H-shaped steel together.
Further, it can be seen from fig. 1 that:
the surface of the distribution beam in the buttress platform frame is provided with a platform plank (not shown in the figure); the periphery of the buttress platform frame is provided with an edge protective railing 18; a vertical ladder 19 used for an operator to go up and down is arranged between the outer side of the steel pipe pile matrix and the buttress platform framework, so that the operator can conveniently perform related operations on the buttress platform, and safety guarantee is provided for the operator to operate on the buttress platform.
Example two
The embodiment provides a method for constructing a temporary buttress for installing box girder jacking equipment, which is provided by the first embodiment.
Fig. 1 is a schematic structural diagram of a temporary buttress for installing a box girder jacking device, fig. 2 is a schematic structural diagram of a pile cap in the temporary buttress for installing the box girder jacking device, and fig. 3 is a schematic working diagram of the temporary buttress for installing the box girder jacking device, according to an embodiment of the present invention, as shown in fig. 1:
a method for building a temporary buttress for installing box girder jacking equipment comprises the following steps:
s10), according to the geological condition obtained by detection, driving the steel pipe piles 11 in a matrix distribution mode in the area where the temporary buttress for installing the box girder pushing equipment needs to be built, wherein the specific number, the driving depth and the distance between the steel pipe piles 11 are based on the box girder pushing equipment 20 which needs to be borne by the temporary buttress for installing the box girder pushing equipment and the sum of loads which need to be borne by the box girder pushing equipment 20 during working and safety guarantee coefficients which need to be reserved;
s20) selecting one steel pipe pile 11 with the largest stress in each row of steel pipe piles in the steel pipe pile matrix to carry out bearing capacity test, if the test result meets the design standard, carrying out the operation step of the next procedure, if the test result does not meet the design standard, carrying out pile supplement or increasing the driving depth of the steel pipe pile 11, and then carrying out the bearing capacity test again, repeating the steps until the bearing capacity test meets the design standard;
s30) determining the actual height of each steel pipe pile 11 in the steel pipe pile matrix through a measuring instrument, and then installing and fixing pile caps 14 at the tops of the steel pipe piles 11 according to the design elevation requirement to enable the elevations of the pile caps 14 to be consistent and accord with the design requirement;
s40) from the height of each steel pipe pile 11 leaving the ground or water surface about 0.5m, connecting each steel pipe pile 11 horizontally by using horizontal support pipes 12 at regular intervals, so that the whole steel pipe pile matrix becomes a frame structure body composed of steel pipe piles 11 as longitudinal support columns and multiple layers of horizontal support pipes 12 as horizontal connecting rods;
s50) connecting the upper and lower horizontal supporting tubes 12 with the steel pipe pile 11 through the inclined supporting tube 13, so that the frame structure further becomes a truss structure;
s60) fixedly mounting a distribution beam 15 on each row of pile caps 14 arranged transversely or longitudinally in the steel pipe pile matrix, and fixedly connecting the end parts of each row of distribution beams 15 by using a connecting beam 16 respectively to ensure that the distribution beams 15 and the connecting beams 16 form a buttress platform framework;
s70) installing the rail beam 17 for installing the box girder pushing equipment 20 at the middle part of each row of the distribution beams 15, i.e. completing the construction of the temporary buttress for installing the box girder pushing equipment.
The box girder 30 is placed on the box girder pushing equipment 20, and the box girder 30 can be pushed and erected.
In this embodiment, the following steps can be further inserted between the steps 60) and 70):
s61) laying platform planks (not shown in the figure) at the gaps between the buttress platform frames;
s62) erecting edge protection railings 18 around the buttress platform frame;
s63) erecting a vertical ladder 19 between the outside of the steel pipe pile matrix and the buttress platform frame for the operator to get on and off.
Steps S61), S62), S63) may be performed simultaneously or separately, one step, all steps, or a combination of different steps may be performed, all according to actual operation requirements, so that the operator can conveniently enter the operation site to perform the pushing operation of the box girder, and a safer operation environment is provided for the operator.
In step S20) of this embodiment, the bearing capacity test is performed by using a pressure test block test method, where the pressure test block is a sandbag pile load or a reaction frame, and which method is specifically used may be determined according to actual conditions on site.
S30) of the present embodiment, the measuring instrument may be a total station.
In this embodiment, the steel pipe piles are driven symmetrically and uniformly from side to side at the pre-identified measurement positions by using a pile driver.
The qualified standard of the driving depth of the steel pipe pile is generally based on the bearing capacity and assisted by the driving depth.
Because underground or underwater geological conditions are complex, the designed penetration depth of the steel pipe pile may have larger deviation with the actual driving depth, and therefore, in order to ensure that the bearing capacity of the steel pipe pile conforms to the designed bearing capacity, sampling pressure test needs to be carried out on a single pile.
Sampling pressure test generally selects a steel pipe pile with the largest stress designed in each row of steel pipe piles in a steel pipe pile matrix as a test pile, the loading pressure test time is 24 hours, settlement data is measured every 12 hours, and the pressure test load is not less than 1.2 times of construction load.
The pressure testing is generally carried out twice, the first settlement is not more than 15mm, the settlement is not required during the second pressure testing, the pressure testing blocks are piled by sand bags or reaction frames, and the concrete application of which type of pressure testing blocks can be determined according to the actual situation on site.
In a specific example, the lower part of a pile cap top plate is welded in a grid distribution mode by taking a steel plate with the thickness of 16mm as a vertical stiffening plate, the steel plate with the thickness of 16mm is adopted as the top plate, during construction, a vertical groove is firstly formed in the top of the steel pipe pile, then the vertical stiffening plate of the pile cap is inserted into the vertical groove in the upper part of the steel pipe pile, after the elevation of the pile cap top plate is measured and adjusted through a total station, the vertical stiffening plate of the pile cap, the pile cap top plate and the steel pipe pile are welded together, and the pile cap is used for reliably transmitting the load transmitted from the top to the steel pipe pile so as to avoid deformation of the top of the steel pipe pile.
In one particular example;
the horizontal supporting tube 12 and the oblique supporting tube 13 are all round tubes made of Q235 materials, and the specification is D200 x 10;
the distribution beam 15 and the track beam 17 are box-shaped structural members formed by splicing double hot-rolled H-shaped steel and welding flanges of the H-shaped steel together, and are made of Q345 in the specification of HN700 x 300 x 13 x 24;
the platform floor (not shown in the figure) is made of Q235 material and a hyacinth bean-shaped pattern steel plate with the thickness of 4mm, and the platform floor (not shown in the figure) is connected with the distribution beam 15 in a welding mode;
the upright posts and the cross bars of the edge-facing protective railings 18 erected around the buttress platform frame are all made of steel pipes D50 x 3, and the edge-facing protective railings are also connected with the distribution beams 15 and the connecting beams 16 in a welding mode.
After the box girder pushing erection is completed, all materials for constructing the temporary buttress can be detached for reuse.
From the above description, it can be seen that:
the temporary buttress for installing the box girder pushing equipment provided by the embodiment of the invention has the advantages of clear structural hierarchy, novel and unique design thought, high structural strength, strong bearing capacity, difficulty in deformation, convenience and simplicity in manufacturing and use, strong practicability, good operability, expansibility and safety, capability of ensuring that the quality guarantee amount of box girder pushing operation in road and bridge construction is completed on time, and capability of well solving the difficult problem in road and bridge construction, so that the temporary buttress has great popularization and application values.
During the description of the above description:
the description of the terms "this embodiment," "an embodiment of the invention," "as shown at … …," "further," "as an alternative," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention;
in this specification, the schematic representations of the terms used above are not necessarily for the same embodiment or example, and the particular features, structures, materials, or characteristics described, etc., may be combined or brought together in any suitable manner in any one or more embodiments or examples;
furthermore, those of ordinary skill in the art may combine or combine features of different embodiments or examples and features of different embodiments or examples described in this specification without undue conflict.
Finally, it should be noted that:
although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made on the technical solutions described in the foregoing embodiments, or some or all of the technical features of the embodiments can be equivalently replaced, and the corresponding technical solutions do not depart from the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a case roof beam pushes away equipment fixing with interim buttress which characterized in that includes:
the device comprises a steel pipe pile, a horizontal supporting pipe, an oblique supporting pipe, a pile cap, a distribution beam, a connecting beam and a track beam;
the steel pipe piles are driven into the mounting positions of the box girder pushing equipment in a matrix distribution mode, the parts of the steel pipe piles, which are exposed out of the ground or the water surface of the mounting positions, are mutually connected and fixed through a plurality of layers of horizontal supporting pipes, and the connecting positions of the upper layer of horizontal supporting pipes and the lower layer of horizontal supporting pipes and the steel pipe piles are connected through the inclined supporting pipes;
the pile caps are arranged at the tops of the steel pipe piles, each row of pile caps which are arranged transversely or longitudinally is fixedly provided with a distribution beam, the end parts of the distribution beams of each row are fixedly connected through the connecting beams, and the distribution beams and the connecting beams form a buttress platform framework;
the track beam is arranged in the middle of each row of distribution beams and used for accommodating the box beam pushing equipment.
2. A temporary buttress for installation of a box girder jacking apparatus according to claim 1, wherein: the distance between the pipe walls of the steel pipe piles distributed in the form of a matrix is 2.5-3.5 meters.
3. A temporary buttress for installation of a box girder jacking apparatus according to claim 1, wherein: the pile cap is formed by connecting a top plate and vertical stiffening plates distributed in a grid shape at the bottom of the top plate.
4. A temporary buttress for installation of a box girder jacking apparatus according to claim 1, wherein: the distribution beam and the track beam are box-type structural members formed by splicing H-shaped steel and welding flanges of the H-shaped steel together.
5. A temporary buttress for installation of a box girder jacking apparatus according to claim 1, wherein:
a platform floor is arranged on the surface of the distribution beam in the buttress platform frame;
the periphery of the buttress platform frame is provided with edge-facing protective railings;
and a vertical ladder used for operators to climb up and down is arranged between the outer side of the steel pipe pile matrix and the buttress platform frame.
6. A method for building a temporary buttress for installing box girder jacking equipment is characterized by comprising the following steps:
s10) according to the geological condition obtained by detection, driving steel pipe piles in a matrix distribution mode in an area where temporary buttresses for installing box girder pushing equipment need to be built, wherein the specific number, the driving depth and the distance among the steel pipe piles are based on the box girder pushing equipment which needs to be borne by the temporary buttresses for installing the box girder pushing equipment and the sum of loads which need to be borne by the box girder pushing equipment and the box girder pushing equipment during working and safety guarantee coefficients which need to be reserved;
s20) selecting one steel pipe pile with the largest stress in each row of steel pipe piles in the steel pipe pile matrix to carry out bearing capacity test, if the test result meets the design standard, carrying out the operation step of the next procedure, if the test result does not meet the design standard, carrying out pile supplement or increasing the driving depth of the steel pipe pile, then carrying out the bearing capacity test again, and repeating the steps until the bearing capacity test meets the design standard;
s30) determining the actual height of each steel pipe pile in the steel pipe pile matrix through a measuring instrument, and then installing and fixing pile caps at the tops of the steel pipe piles according to the design elevation requirement to enable the elevation of each pile cap to be consistent and accord with the design requirement;
s40) from the high position of each steel pipe pile, which is about 0.5m away from the ground or the water surface, the steel pipe piles are transversely connected by horizontal supporting pipes at certain intervals, so that the whole steel pipe pile matrix becomes a frame structure body which is composed of the steel pipe piles as longitudinal supporting columns and a plurality of layers of horizontal supporting pipes as transverse connecting rods;
s50) connecting the upper and lower layers of horizontal supporting tubes with the steel pipe piles through inclined supporting tubes to further enable the frame structure to be a truss structure;
s60) fixedly mounting a distribution beam on each row of transversely or longitudinally arranged pile caps in the steel pipe pile matrix, and fixedly connecting the end parts of the distribution beams in each row by using a connecting beam respectively to enable the distribution beams and the connecting beams to form a pier platform framework;
s70) installing a track beam for arranging the box girder pushing equipment in the middle of each row of the distribution beams, namely completing the construction of the temporary buttress for installing the box girder pushing equipment.
7. A method of constructing a temporary pier for installing a box girder pushing equipment according to claim 6, further comprising the steps between the steps of 60) and 70):
s61) laying platform planks at the gaps among the pier platform frames.
8. A method of constructing a temporary pier for installing a box girder pushing equipment according to claim 6, further comprising the steps between the steps of 60) and 70):
s62) erecting edge-facing protective railings around the buttress platform frame.
9. A method of constructing a temporary pier for installing a box girder pushing equipment according to claim 6, further comprising the steps between the steps of 60) and 70):
s63) erecting a vertical ladder for operators to go up and down between the outer side of the steel pipe pile matrix and the buttress platform frame.
10. The method of constructing a temporary pier for installing a box girder pushing apparatus according to claim 6, wherein:
in the step S20), the bearing capacity test adopts a pressure test block test method to test, and the used pressure test block adopts a sandbag pile load or a reaction frame;
in step S30), the measuring instrument is a total station.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0953217A (en) * | 1995-08-11 | 1997-02-25 | Maeda Corp | Method of jacket construction of water-surface erected structure by h-steel bearing pile |
| CN103266573A (en) * | 2013-06-17 | 2013-08-28 | 中铁山桥集团有限公司 | Self-anchored suspension bridge steel box girder three-slideway synchronous jacking construction method |
| CN105568866A (en) * | 2015-12-31 | 2016-05-11 | 中铁二十局集团第六工程有限公司 | Incremental launching construction method for large-span steel box girder spanning constructed road |
| KR101648008B1 (en) * | 2015-08-04 | 2016-08-16 | 주식회사 영진스틸 | Temporary bridge using precast truss assembly construction method |
| CN107386125A (en) * | 2017-09-01 | 2017-11-24 | 崔欣 | The construction method that a kind of Steel Box Girder of Self-Anchored Suspension beam closes up |
| CN206986728U (en) * | 2017-06-08 | 2018-02-09 | 中国水利水电第五工程局有限公司 | A kind of walking incremental launching construction by multipoint jacking workbench |
| CN109281255A (en) * | 2018-10-26 | 2019-01-29 | 中交路桥华南工程有限公司 | Girder steel slippage bracket and system |
| CN109629439A (en) * | 2019-01-15 | 2019-04-16 | 中铁局集团有限公司 | A kind of single pylon cable stayed bridge construction method |
| CN208995937U (en) * | 2018-08-23 | 2019-06-18 | 中交路桥建设有限公司 | Mounting bracket is slid suitable for the S type steel box girder of cable stayed bridge above subway station |
| CN109958051A (en) * | 2019-03-04 | 2019-07-02 | 中国建筑第八工程局有限公司 | Large span difference in height tie-rod arch structure top-pushing mechanism and pushing method |
| CN209178837U (en) * | 2018-11-26 | 2019-07-30 | 中铁二十局集团第四工程有限公司 | Large-span Oblique-crossing abnormity steel box girder top pushing structure |
| CN110593137A (en) * | 2019-09-19 | 2019-12-20 | 常州市市政建设工程有限公司 | Large-tonnage pushing device |
-
2020
- 2020-05-14 CN CN202010405591.6A patent/CN111535158A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0953217A (en) * | 1995-08-11 | 1997-02-25 | Maeda Corp | Method of jacket construction of water-surface erected structure by h-steel bearing pile |
| CN103266573A (en) * | 2013-06-17 | 2013-08-28 | 中铁山桥集团有限公司 | Self-anchored suspension bridge steel box girder three-slideway synchronous jacking construction method |
| KR101648008B1 (en) * | 2015-08-04 | 2016-08-16 | 주식회사 영진스틸 | Temporary bridge using precast truss assembly construction method |
| CN105568866A (en) * | 2015-12-31 | 2016-05-11 | 中铁二十局集团第六工程有限公司 | Incremental launching construction method for large-span steel box girder spanning constructed road |
| CN206986728U (en) * | 2017-06-08 | 2018-02-09 | 中国水利水电第五工程局有限公司 | A kind of walking incremental launching construction by multipoint jacking workbench |
| CN107386125A (en) * | 2017-09-01 | 2017-11-24 | 崔欣 | The construction method that a kind of Steel Box Girder of Self-Anchored Suspension beam closes up |
| CN208995937U (en) * | 2018-08-23 | 2019-06-18 | 中交路桥建设有限公司 | Mounting bracket is slid suitable for the S type steel box girder of cable stayed bridge above subway station |
| CN109281255A (en) * | 2018-10-26 | 2019-01-29 | 中交路桥华南工程有限公司 | Girder steel slippage bracket and system |
| CN209178837U (en) * | 2018-11-26 | 2019-07-30 | 中铁二十局集团第四工程有限公司 | Large-span Oblique-crossing abnormity steel box girder top pushing structure |
| CN109629439A (en) * | 2019-01-15 | 2019-04-16 | 中铁局集团有限公司 | A kind of single pylon cable stayed bridge construction method |
| CN109958051A (en) * | 2019-03-04 | 2019-07-02 | 中国建筑第八工程局有限公司 | Large span difference in height tie-rod arch structure top-pushing mechanism and pushing method |
| CN110593137A (en) * | 2019-09-19 | 2019-12-20 | 常州市市政建设工程有限公司 | Large-tonnage pushing device |
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