WO2021114689A1

WO2021114689A1 - Construction method for traffic gate in bridge road flyover construction

Info

Publication number: WO2021114689A1
Application number: PCT/CN2020/106033
Authority: WO
Inventors: 陈兴林; 夏时光; 戴德军; 程喜; 李江涛; 卜德双; 何向东
Original assignee: 中铁十九局集团广州工程有限公司
Priority date: 2020-03-05
Filing date: 2020-07-31
Publication date: 2021-06-17
Also published as: CN111335089A; CN111335089B

Abstract

A construction method for a traffic gate in bridge road flyover construction, comprising installation steps and dismantling steps, the installation steps comprising: installing a plurality of supporting steel pipes on two sides of a road; installing release apparatuses on the supporting steel pipes, the release apparatuses comprising an upper base (1) able to move up and down; adjusting a pre-set height of the upper bases (1) and installing longitudinal beams on the upper bases (1), the longitudinal beams being arranged on the supporting steel pipes on the same side of the road; installing cross beams on the longitudinal beams, the cross beams being arranged on the longitudinal beams on the two sides of the road; and arranging a form on the cross beams and pouring concrete.

Description

Construction method of traffic gate opening in bridge road crossing construction

Technical field

The invention relates to the field of construction engineering, in particular to a construction method of a traffic gate in the cross-line construction of bridges and roads.

Background technique

With the continuous improvement of my country's transportation road network, various bridges and roads intersect vertically and horizontally, and it is often necessary to cross existing roads during cross construction. During construction, it is necessary to ensure that the new road can be completed on schedule and the normal operation of the original road. The common construction method is to erect a steel structure temporary traffic portal above the original road. The steel structure temporary traffic doorway includes supporting steel pipes and longitudinal beams welded to the supporting steel pipes, I-beams, and formwork. The existing construction method requires the longitudinal beams and the supporting steel pipes to be welded, which is achieved by cutting the supporting steel pipes after the construction is completed. To support the separation of steel pipes and longitudinal beams, this removal method has the shortcomings of long removal cycle and waste of steel pipes. In the existing unloading device, the upper and lower ends of the left and right sliders are set with sharp angle structures, which cannot be placed on a plane smoothly. When the screw is worn, it is necessary to hold or hold the slider by hand to wear it. The set operation brings inconvenience.

technical problem

The object of the present invention is to provide a construction method that not only facilitates the dismantling operation, but also saves the traffic gate opening in the construction of bridge roads supporting steel pipes.

技术解决手段Technical solutions

In order to achieve the above-mentioned purpose, the present invention provides a method for constructing a traffic doorway in bridge road cross-line construction, which includes an installation step. The installation step includes: installing a number of supporting steel pipes on both sides of the road; installing a drop device on the supporting steel pipes, The unloading device includes an upper support, a lower support, a left slide, a right slide, a screw and two nuts. The upper support is located above the lower support, and the left and right slides are located on both sides of the lower support. , The upper support is provided with a first inclined part and a second inclined part, the first inclined part and the second inclined part are inclined from the top to the bottom from the two sides of the upper support to the middle of the support, and the lower support is provided with There are a third inclined part and a fourth inclined part. The third inclined part and the fourth inclined part are inclined from the two sides of the upper support to the middle of the support from the bottom to the top. The left slider is provided with a fifth inclined part and a second inclined part. Six inclined parts, a first flat part and a second flat part, the fifth inclined part is arranged parallel to and adjacent to the first inclined part, the sixth inclined part is arranged parallel to and adjacent to the third inclined part, the first flat part and the second flat Are partially set on the end surfaces of the upper and lower ends of the left slider, the first plane portion and the second plane portion are respectively arranged in parallel with the bottom wall of the lower support, and the right slider is provided with a seventh inclined portion, an eighth inclined portion, and a first The three-plane part and the fourth flat part, the seventh inclined part and the second inclined part are arranged in parallel and adjacent to each other, the eighth inclined part and the fourth inclined part are arranged in parallel and adjacent to each other, and the third and fourth flat parts are arranged on the right slide On the end faces of the upper and lower ends of the block, the third plane part and the fourth plane part are respectively arranged in parallel with the bottom wall of the lower support. The screw penetrates the left and right sliders, and the axial direction of the screw is parallel to the bottom wall of the lower support. , The nut is set on the screw, the left slider and the right slider are located between the two nuts; adjust the preset height of the upper support and install the longitudinal beam on the upper support, the longitudinal beam is set on the support steel pipe on the same side of the road Install the beam on the longitudinal beams, which are set on the longitudinal beams on both sides of the road; lay the formwork on the beams and pour concrete.

A further solution is that after the installation step is performed, the removal step is also performed including: rotating the nut to move to the end of the screw; controlling the left slider to move along the third inclined part to the end of the screw, and at the same time controlling the right slider to move along the first The four inclined parts move to the end of the screw to drive the upper support to move down, so that the upper support is separated from the longitudinal beam; the supporting steel pipe, the longitudinal beam and the formwork are removed to separate the formwork from the concrete.

A further solution is that the unloading device further includes two supporting parts, the two supporting parts are located on both sides of the screw axis, and the supporting part is located between the first inclined part and the second inclined part.

A further solution is that the top wall of the support part is higher than the height of the screw in the horizontal direction and lower than the lowest position of the fifth inclined part and the lowest position of the seventh inclined part.

A further solution is that the top wall of the support part is arranged parallel to the bottom wall of the upper support.

A further solution is that when the support part is in contact with the upper support, the upper support is separated from the left and right sliders; when the upper support is adjacent to the left and right sliders, the upper support is separated from the support .

A further solution is that an anti-skid pad is provided on the top wall of the support part.

Beneficial effect

In the present invention, a screw rod that penetrates the left and right sliders at the same time is arranged, and nuts are arranged at both ends of the screw, and the left and right sliders are pushed to move relatively close by rotating the nuts, thereby pushing the upper support to move vertically upwards. It is used to support the longitudinal beams to facilitate the installation of beams, formwork and concrete pouring on the longitudinal beams; after the concrete construction is completed for a certain period of time, the door opening needs to be removed. At this time, the nut is rotated in the opposite direction and the left and right sliders are moved away from each other. At this time, the upper support moves downward under the action of gravity, so that the upper support is separated from the longitudinal beam.

The unloading device of the present invention is installed between the supporting steel pipe and the longitudinal beam, which not only facilitates and quickly realizes the separation of the support steel pipe and the longitudinal beam, saves time and improves efficiency, but also avoids cutting the support steel pipe, ensures the integrity of the support steel pipe, and saves materials. The upper and lower ends of the left slider and the right slider of the present invention are provided with flat surfaces. On the one hand, when the screw is threaded, the flat surface can be adjacent to the top wall of the supporting steel pipe, so that both the left slider and the right slider can It is placed steadily on the left and right sides of the lower support, and the screw threading operation can be completed without the need to hold the slider. On the other hand, the upper and lower ends of the slider are provided with flat parts, and the inclined part is located on the side of the flat part. When the upper support supports the longitudinal beam, the inclined part is compressed by the external force and has a tendency to deform. The arrangement of the flat part can strengthen the strength of the slider and reduce the probability of deformation.

Description of the drawings

Fig. 1 is a structural diagram of the first embodiment of the unloading device of the present invention when it is used to support a longitudinal beam.

Fig. 2 is an exploded view of the structure of the first embodiment of the unloading device according to the present invention when the screw is threaded.

Fig. 3 is a structural diagram of a second embodiment of the unloading device of the present invention.

Figure 4 is a flow chart of the installation steps in the construction method of the present invention.

The present invention will be further described below in conjunction with the drawings and embodiments.

Embodiments of the present invention

The first embodiment of the unloading device

1 and 2, the unloading device of this embodiment includes an upper support 1, a lower support 2, a left slider 3, a right slider 4, a screw rod 5 and two nuts 6, the upper support 1 is located on the lower support Above the base 2, the left slider 3 and the right slider 4 are located on both sides of the lower support 2. Both the left slider 3 and the right slider 4 are provided with through holes, so that the screw 5 penetrates the left slider 3 and the right slider Block 4, the axial direction of the screw 5 is parallel to the bottom wall of the lower support 2, and the nut 6 is threadedly connected to the end of the screw 5, so that the left slider 3 and the right slider 4 are located between the two nuts 6, the nut 6 The end faces of are adjacent to the side wall of the left slider 3 and the side wall of the right slider 4, respectively.

The upper support 1 is set as an inverted isosceles trapezoid structure. The left and right sides of the upper support 1 are provided with a first inclined portion 11 and a second inclined portion 12, and the first inclined portion 11 and the second inclined portion 12 are arranged from above. The bottom is inclined from the two sides of the upper support 1 to the middle of the upper support 1. The upper support 1 is formed by welding a surrounding third frame 13 and two third baffles 14. The third baffles 14 are sealed on the front and rear ends of the third frame 13, so that the upper support 1 is hollow. The closed structure. The third baffle 14 is recessed in the third frame 13, so that a step is formed between the side wall of the third baffle 14 and the end surface of the third frame 13. When the third baffle 14 is welded, the welding head is along the edge of the step Perform welding.

The lower support 2 is set in an isosceles trapezoid structure. The left and right sides of the lower support 2 are provided with a third inclined portion 21 and a fourth inclined portion 22. The third inclined portion 21 and the fourth inclined portion 22 are from bottom to top. The two sides of the support 2 are inclined downward in the direction of the middle of the support 2. The lower support 2 is formed by welding a surrounding fourth frame 23 and two fourth baffles 24. The fourth baffles 24 are sealed on the front and rear ends of the fourth frame 23, so that the lower support 2 is hollow. The closed structure. The fourth baffle 24 is recessed in the fourth frame 23, so that a step is formed between the side wall of the fourth baffle 24 and the end surface of the fourth frame 23. When the fourth baffle 24 is welded, the welding head is along the edge of the step Perform welding.

The cross section of the left slider 3 is set as a combination of a trapezoid and a rectangle. The upper end of the left slider 3 is provided with a fifth inclined portion 31 and a first flat portion 33, and the lower end of the right slider 4 is provided with a sixth inclined portion 32 and The second plane 34. The fifth inclined portion 31 and the sixth inclined portion 32 correspond up and down, the fifth inclined portion 31 is arranged parallel to and adjacent to the first inclined portion 11, and the sixth inclined portion 32 is arranged parallel to and adjacent to the third inclined portion 21. The first flat portion 33 and the second flat portion 34 correspond up and down, and the first flat portion 33 and the second flat portion 34 are respectively arranged in parallel with the bottom wall of the lower support 2. The left slider 3 is formed by welding an enclosing first frame 35 and two first baffles 36. The first baffles 36 are sealed on the front and rear ends of the first frame 35, so that the left slider 3 is hollow. The closed structure. The first baffle 36 is recessed in the first frame 35, so that a step is formed between the side wall of the first baffle 36 and the end surface of the first frame 35. When the first baffle 36 is welded, the welding head is along the edge of the step. Perform welding.

The cross section of the right slider 4 is a combination of a trapezoid and a rectangle. The upper end of the right slider 4 is provided with a seventh inclined portion 41 and a third flat portion 43, and the lower end of the right slider 4 is provided with an eighth inclined portion 42 and The fourth plane 44. The seventh inclined portion 41 and the eighth inclined portion 42 correspond up and down, the seventh inclined portion 41 is arranged parallel to and adjacent to the second inclined portion 12, and the eighth inclined portion 42 is arranged parallel to and adjacent to the fourth inclined portion 22. The third flat part 43 and the fourth flat part 44 correspond up and down, and the third flat part 43 and the fourth flat part 44 are respectively arranged in parallel with the bottom wall of the lower support 2. The right slider 4 is formed by welding the enclosing second frame 45 and two second baffles 46, and the second sealing is on the front and rear ends of the second frame 45, so that the right slider 4 forms a hollow closed structure . The second baffle 46 is recessed in the second frame 45, so that a step is formed between the side wall of the second baffle 46 and the end surface of the second frame 45. When the second baffle 46 is welded, the welding head is along the edge of the step Perform welding.

Both the left slider 3 and the right slider 4 are welded by high-strength steel plates. They have a certain weight. When the screw 5 is worn, the left slider 3 and the right slider 4 can be placed on a flat surface smoothly. , That is, the second plane portion 34 and the fourth plane portion 44 are adjacent to the plane. At this time, hold one end of the screw 5, and then pass the other end of the screw 5 through the through holes of the left slider 3 and the right slider 4, and then Nuts 6 are installed on both ends of the screw 5 to complete the sleeve operation.

Next, the left slider 3 and the right slider 4 are placed on the left and right sides of the lower support 2, and the third inclined portion 21 is adjacent to the sixth inclined portion 32, and the fourth inclined portion 22 and the eighth inclined portion 42 are adjacent to each other. Abut, and then install the upper support 1 between the left slider 3 and the right slider 4, and make the fifth inclined portion 31 abut the first inclined portion 11, and the seventh inclined portion 41 abuts the second inclined portion 12 . At this time, the left slider 3 and the right slider 4 are moved closer to each other by rotating the nut 6 to push the upper support 1 up to a preset height. The longitudinal beam can be installed on the upper support 1 at this time. During the dismantling operation, first rotate the nut 6 in the reverse direction, and make the left slider 3 and the right slider 4 move away from each other. At this time, the upper support 1 moves downward under the action of gravity to realize the upper support 1 and the longitudinal beam. Separate operation.

The second embodiment of the unloading device

Referring to FIG. 3, on the basis of the first embodiment of the unloading device, the lower support 2 of this embodiment is provided with two supporting parts 37, and the two supporting parts 37 are located on both sides of the screw 5 in the axial direction. The supporting portion 37 is located between the first inclined portion 11 and the second inclined portion 12. The top wall of the supporting portion 37 is higher than the height of the screw 5 in the horizontal direction, and is lower than the lowest position of the fifth inclined portion 31 and the seventh The lowest position of the inclined portion 41. The lowest position refers to the height position of the fifth inclined portion 31 when the second flat portion 34 of the left slider 3 and the bottom wall of the lower support 2 are in the same plane, or when the fourth When the flat portion 44 and the bottom wall of the lower support 2 are in the same plane, the seventh inclined portion 41 is at a height position. The top wall of the supporting portion 37 is arranged in parallel with the bottom wall of the upper support 1 for abutting against the upper support 1. When the support portion 37 abuts the upper support 1, the upper support 1 separates from the left slider 3 and the right slider 4; when the upper support 1 abuts the left slider 3 and the right slider 4, the upper support 1 is separated from the supporting portion 37.

An anti-skid pad is provided on the top wall of the support portion 37 to prevent the upper support 1 and the support portion 37 from being misaligned when abutting, causing the upper support 1 and the support portion 37 to separate.

Construction method embodiment

Referring to Fig. 4, the construction method of the traffic gate opening in the bridge road crossing construction in this embodiment includes installation steps and dismantling steps.

The installation steps of this embodiment include:

First, perform step S1 to install several supporting steel pipes on both sides of the road.

Then step S2 is executed to install a drop device on each support steel pipe, and the drop device is the drop device in the above-mentioned embodiment.

Then step S3 is performed to adjust the preset height of the upper support in the unloading device and install the longitudinal beam on the upper support, and the longitudinal beam is set on the supporting steel pipe on the same side of the road. Adjusting the preset height of the upper support in the unloading device specifically includes: rotating two nuts so that the two nuts move relatively closely along the axial direction of the screw, and then push the left and right sliders to move relatively close, and the left and right sliders move closer together. The right slider pushes the upper support to move up to the preset height.

Then step S4 is executed to install the cross beams on the longitudinal beams, and the cross beams are arranged on the longitudinal beams on both sides of the road.

Then perform step S5 to lay the formwork on the beam and pour concrete.

After the installation steps are performed, the removal steps are also performed. The removal steps include:

Rotate the two nuts to move the nut to the closest end of the screw.

The left slider is controlled to move along the third inclined portion to the end of the screw, while the right slider is controlled to move along the fourth inclined portion to the end of the screw, driving the upper support to move downward, so that the upper support is separated from the longitudinal beam.

Remove the supporting steel pipes, longitudinal beams and formwork to separate the formwork from the concrete.

工业应用性Industrial applicability

The invention is a construction method of a traffic door opening in the bridge road cross-line construction, which can be applied to the bridge road cross-line construction. Because the present invention provides the unloading device between the supporting steel pipe and the longitudinal beam, the upper support of the unloading device is used to support the longitudinal beam when the upper support is at a higher position, and when the upper support is at the lower position, the upper support and The rapid separation of the longitudinal beams saves time and improves the efficiency of construction.

Claims

A method for constructing a traffic doorway in a bridge and road crossing construction, including an installation step, is characterized in that:

The installation steps include:

Install several supporting steel pipes on both sides of the road;

A drop device is installed on the support steel pipe. The drop device includes an upper support, a lower support, a left slider, a right slider, a screw and two nuts. The upper support is located on the lower support. Above, the left slider and the right slider are located on both sides of the lower support, the upper support is provided with a first inclined portion and a second inclined portion, the first inclined portion and the The second inclined portion is inclined from both sides of the upper support to the middle of the upper support from top to bottom, and the lower support is provided with a third inclined portion and a fourth inclined portion. The three inclined portions and the fourth inclined portion are inclined from both sides of the lower support to the middle of the lower support from bottom to top, and the left slider is provided with a fifth inclined portion and a sixth inclined portion , A first flat surface portion and a second flat surface portion, the fifth inclined portion is arranged parallel to and adjacent to the first inclined portion, the sixth inclined portion is arranged parallel to and adjacent to the third inclined portion, the first A plane portion and the second plane portion are provided on the end surfaces of the upper and lower ends of the left slider, the first plane portion and the second plane portion are respectively arranged in parallel with the bottom wall of the lower support, The right slider is provided with a seventh inclined portion, an eighth inclined portion, a third flat portion, and a fourth flat portion. The seventh inclined portion is arranged parallel to and adjacent to the second inclined portion, and the eighth The inclined part is arranged parallel to and adjacent to the fourth inclined part, the third flat part and the fourth flat part are arranged on the end faces of the upper and lower ends of the right slider, the third flat part and the The fourth plane portions are respectively arranged in parallel with the bottom wall of the lower support, the screw passes through the left slider and the right slider, and the axial direction of the screw is parallel to the bottom wall of the lower support, The nut is arranged on the screw, and the left slider and the right slider are located between the two nuts;

The method includes:

Adjusting the preset height of the upper support and installing a longitudinal beam on the upper support, the longitudinal beam being arranged on the supporting steel pipe on the same side of the road;

Installing cross beams on the longitudinal beams, the cross beams being arranged on the longitudinal beams on both sides of the road;

Laying a formwork and pouring concrete on the beam.
The construction method according to claim 1, characterized in that:

After the installation step is performed, a dismantling step is also performed, and the dismantling step includes:

Rotating the nut to move to the end of the screw;

Control the left slider to move to the end of the screw along the third inclined portion, and control the right slider to move to the end of the screw along the fourth inclined portion to drive the upper support The seat moves downward so that the upper support is separated from the longitudinal beam;

The supporting steel pipe, the longitudinal beam and the formwork are removed to separate the formwork from the concrete.
The construction method according to claim 1 or 2, characterized in that:

The unloading device also includes two supporting parts, the two supporting parts are located on both sides of the screw shaft, and the supporting part is located between the first inclined part and the second inclined part .
The construction method according to claim 3, characterized in that:

The top wall of the supporting part is higher than the height of the screw in the horizontal direction, and lower than the lowest position of the fifth inclined part and the lowest position of the seventh inclined part.
The construction method according to claim 3 or 4, characterized in that:

The top wall of the support part is arranged in parallel with the bottom wall of the upper support.
The construction method according to claim 5, characterized in that:

When the support part abuts the upper support, the upper support is separated from the left slider and the right slider; the upper support is separated from the left slider and the right slider When abutting, the upper support is separated from the support part.
The construction method according to any one of claims 3 to 6, characterized in that:

An anti-skid pad is arranged on the top wall of the supporting part.