CN204455801U - A kind of bridge abutment structure - Google Patents

Abstract

The utility model relates to the technical field of steel trestles in bridge engineering, and discloses an abutment structure, which includes: steel pipe piles; also includes: a retaining back wall, a horizontal main distribution beam, and a longitudinal secondary distribution beam; the steel pipe piles are arranged on the trestle On the side slope of the junction access road, the horizontal main distribution beam is arranged on the top of the steel pipe pile along the transverse bridge direction, the longitudinal secondary distribution beam is arranged on the horizontal main distribution beam along the longitudinal bridge direction, and the retaining back plate is vertically fixed on the longitudinal secondary distribution beam. The utility model is not affected by the erosion of the slope protection in front of the platform by heavy rain and water waves, reduces the maintenance investment in the later period, and uses the force characteristics of the steel trestle structure itself to balance the soil pressure and gravity of the soil filling path at the back of the platform, so as to reduce the The role of the reliable and stable connection between the filling access road and the steel trestle bridge. It is easy to install and dismantle, and the section steel can be recycled and reused, thereby avoiding the environmental pollution of the masonry structure and improving the turnover rate of materials.

Description

a bridge structure

technical field

The utility model relates to the technical field of bridge engineering steel trestle bridges.

Background technique

In the process of modern bridge construction, steel trestle has become an indispensable auxiliary tool in the construction process to meet the transfer needs of various construction resources such as people, materials, and machines. During the use of the steel trestle bridge, affected by factors such as the construction load of the trestle bridge, heavy rain and water wave erosion, the foundation is prone to subsidence and cause the phenomenon of "jumping at the bridge head", which affects the normal use of the trestle bridge.

In the traditional steel trestle construction process, the filling soil of the cross-strait access road is a flexible foundation, and the abutment foundation is located in the slope protection range of the access road. Before the construction of the trestle abutment structure, the strength of the foundation must be treated. Most of the treatment options are the following two types: Scheme 1 The method is to throw and fill the rocks within the scope of slope protection for rolling, replace the weak foundation, and then pour the concrete abutment foundation; the second option is to use the pipe pile foundation, and pour concrete tie beams on the pipe piles as the foundation of the trestle abutment.

The disadvantages of the existing technology in practical application are: Although the first solution overcomes the influence of heavy rain or lake water scouring on the slope protection, the occurrence of foundation settlement is inevitable. Although Option 2 solves the foundation settlement problem, the investment in the construction of the concrete abutment structure is also relatively large, and the side slope foundation of the access road abutment facing the water is prone to collapse due to heavy rain or water waves, and slope protection measures need to be invested. If plan 1 and plan 2 are used in combination, the construction investment will be relatively large, and the abutment structure will need to be maintained in the later stage, and the economic efficiency of the project will not be high.

Utility model content

The technical problem to be solved by the utility model is to provide an abutment structure, which has the ability to use the steel pipe pile foundation to overcome the settlement problem of the backfill access road foundation, and adopts the retaining back wall structure to avoid the erosion of the slope protection by heavy rain and water waves impact and reduce construction investment.

In order to solve the above technical problems, the utility model provides an abutment structure, including: steel pipe piles; also includes: retaining back wall, horizontal main distribution beam, vertical secondary distribution beam; On the side slope of the sidewalk, the horizontal main distribution beam is arranged on the top of the steel pipe pile along the horizontal bridge direction, the longitudinal secondary distribution beam is arranged on the horizontal main distribution beam along the longitudinal bridge direction, and the soil retaining back plate is arranged along the horizontal bridge direction. The bridge is vertically fixed on the longitudinal secondary distribution beam.

The scheme for improving the above basic structure is to further include: braces; the braces are arranged between the retaining back wall and the longitudinal sub-distributing beam, Between them is a triangular structure.

The preferred technical solution for the above scheme is that the steel pipe piles include: a first row of steel pipe piles and a second row of steel pipe piles; The second row of steel pipe piles is arranged on one side of the bridge body, and each steel pipe pile is connected and fixed by a horizontal connection system 4 and a vertical connection system 3;

The transverse main distribution beam includes: a first transverse main distribution beam and a second transverse main distribution beam; the first transverse main distribution beam is arranged on the top of the first row of steel pipe piles, and the second transverse main distribution beam is arranged on At the top of the second row of steel pipe piles, the tops of the first transverse main distribution beam and the second transverse main distribution beam are fixedly connected with the longitudinal secondary distribution beam;

The retaining back wall is fixed on the longitudinal secondary distribution beam at the top of the first row of steel pipe piles.

The technical solution for further improving the above-mentioned solution is to include: beam skeleton;

The retaining back wall includes: a steel plate, a transverse framework, and a vertical framework; the transverse framework is fixed on one side of the steel plate, the vertical framework is fixed on the transverse framework, and the vertical framework and the longitudinal The secondary distribution beam corresponds to and is perpendicular to the longitudinal secondary distribution beam;

One end of the strut is fixed on the longitudinal secondary distribution beam, and the other end of the strut is fixed to the vertical skeleton of the retaining back wall through the beam skeleton.

A further preferred technical solution is that the width of the retaining back wall is equal to the design width of the trestle plus the design height of the retaining back wall.

A further improved technical solution is to further include: a Bailey sheet and a door-shaped positioning card ; after the vertical rod of the Bailey sheet is pressed against the beam skeleton, it is fixed on the second frame through the door-shaped positioning card. on the transverse main distribution beam.

A more preferred technical solution is that the width of each row of steel pipe piles is equivalent to the width of the trestle, and the distance between the first row of steel pipe piles and the second row of steel pipe piles is greater than the height of the retaining back wall.

The utility model has the advantages of:

1. The utility model uses the steel pipe pile foundation to overcome the settlement problem of the backfill access road foundation, adopts the retaining back wall structure, avoids the impact of heavy rain and water waves on slope protection, and reduces construction investment.

2. Utilize the struts to transmit the load of the abutment back to the steel pipe pile foundation, rationally utilize the force characteristics of the steel trestle structure itself, balance the soil pressure and gravity of the abutment back, and avoid the occurrence of "bridge head jumping" due to the settlement of the filling access road car" problem.

3. When the width of the retaining back wall of the utility model is designed to be equal to the design width of the trestle bridge plus the design height of the back wall, it can meet the requirements of the slope of the filling access road, avoid the back of the platform from collapsing due to the erosion of water waves, and not It will make the protection range too large, which is a more suitable and reasonable width selection.

The abutment structure provided by the utility model is a steel abutment structure, which is not only safe and fast in construction, is not affected by the erosion of the slope protection in front of the abutment by heavy rain and water waves, but also reduces the maintenance investment in the later period, and utilizes the steel trestle structure itself The force characteristics balance the earth pressure and gravity of the backfill access road on the back of the platform, and play the role of reliable and stable connection between the fill access road and the steel trestle bridge. The utility model is also easy to dismantle, and the section steel can be recycled and reused, thereby avoiding the pollution of the masonry structure to the environment and improving the turnover utilization rate of materials.

Description of drawings

Fig. 1 is a schematic diagram of the longitudinal bridge structure of the embodiment of the utility model.

Fig. 2 is a schematic structural diagram of the horizontal bridge of the embodiment of the utility model.

Among them, 1A-the first row of steel pipe piles, 1B-the second row of steel pipe piles, 2A-the first row of horizontal main distribution beams, 2B-the second row of horizontal main distribution beams, 3-the longitudinal connection system between piles, 4- Horizontal connection system between piles, 5-longitudinal sub-distribution beam, 6-back wall panel, 7-back wall horizontal skeleton, 8-back wall vertical skeleton, 9-strut, 10-beam skeleton, 11-Berry sheet, 12-telescopic steel plate, 13-junction filling soil access, 14-door positioning card, 15-stiffening plate, 16-deck structure of trestle bridge.

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the intended invention purpose, the specific implementation and working principle of the abutment structure proposed by the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

As shown in Figures 1 and 2, the abutment structure provided by the utility model mainly includes: steel pipe piles, retaining back walls, horizontal main distribution beams, and longitudinal secondary distribution beams 5 . The steel pipe piles are arranged on the side slope of the trestle junction access road, the horizontal main distribution beam is arranged on the top of the steel pipe pile along the horizontal bridge direction, the longitudinal secondary distribution beam 5 is arranged on the horizontal main distribution beam along the longitudinal bridge direction, and the soil retaining back plate The bridge is vertically fixed on the longitudinal secondary distribution beam 5 .

For the fixing method between the retaining back plate along the transverse bridge and the longitudinal sub-distribution beam 5, preferably, a brace 9 is set between the retaining back wall and the longitudinal sub-distribution beam 5, and the retaining back wall is fixed by the brace 9 1. A stable triangular structure is formed between the longitudinal secondary distribution beam 5 and the struts 9 . As for the specific structure of the retaining back wall, preferably, it is composed of: a back wall panel 6 , a back wall transverse skeleton 7 , and a back wall vertical skeleton 8 . In order to ensure that the skeleton structure of the retaining back wall is evenly stressed, a beam skeleton 10 is added between the struts 9 and the retaining back plate to fix it with the vertical skeleton 8 of the back wall of the retaining back wall.

For the arrangement of steel pipe piles, preferably, the steel pipe piles include: a first row of steel pipe piles 1A, a second row of steel pipe piles 1B, and the steel pipe piles used in this embodiment are designed in double rows. As shown in Figure 1, the first row of steel pipe piles 1A is arranged on the side close to the filling path 13 of the trestle bridge line, and the second row of steel pipe piles 1B is arranged on the side of the bridge body. The connection system 4 and the longitudinal connection system 3 between the piles are connected and fixed. The width of each row of steel pipe piles is equivalent to the width of the trestle bridge, and the distance between the first row of steel pipe piles 1A and the second row of steel pipe piles 1B is greater than the height of the retaining back wall. At this time, the number of transverse main distribution beams is equal to the number of rows of steel pipe piles, including: the first row of transverse main distribution beams 2A, and the second row of transverse main distribution beams 2B. The first row of transverse main distribution beams 2A is set on the top of the first row of steel pipe piles 1A, the second row of transverse main distribution beams 2B is set on the top of the second row of steel pipe piles 1B, the first row of transverse main distribution beams 2A and the second row of steel pipe piles The tops of the transverse main distribution beams 2B are fixedly connected with the longitudinal sub-distribution beams 5, and the retaining back wall is fixed on the longitudinal sub-distribution beams 5 at the top of the first row of steel pipe piles 1A.

The specific construction process of the utility model is as follows: use piling equipment to complete the construction of the steel pipe piles of the foundation of the steel trestle abutment, install the longitudinal connection system 3 between the piles and the horizontal connection system 4 between the piles in sequence, then install the transverse main distribution beam, and use the stiffening The plate 15 welds firmly the transverse main distribution beam and the steel pipe pile, and finally installs the longitudinal distribution beam 5 on the transverse main distribution beam, and welds it firmly with the transverse distribution beam.

The structure of the retaining back wall is made of steel plates and section steel. The width of the retaining back wall is equal to the design width of the trestle plus the design height of the back wall, because in the actual construction process, the width of the retaining back wall is greater than the width of the filling path , there are two reasons, (1) the requirement for the grading of the earth filling access road 13 on both sides of the trestle bridge; (2) to prevent the back of the abutment and abutment from collapsing due to the erosion of water waves, but how much wider the width should be, in the absence of practical experience time, it cannot be determined exactly.

Why is the design width of the trestle bridge plus the design height of the back wall, because the design height of the back wall is equal to the height of the Bailey sheet 11 plus the height of the trestle deck structure 16? The higher the building, the larger the slope, and the larger the scope of the cone slope to be protected, and vice versa. According to the existing construction findings, the design width of the back wall is equal to the design width of the trestle bridge plus the design height of the back wall, which can meet the It is a more appropriate and reasonable width selection for the grading requirement of the earth filling access road to avoid the back of the platform from collapsing due to the erosion of water waves, and not to make the protection range too large. The retaining back wall can be processed in the steel structure processing area first, and then transported to the abutment for on-site installation. The design strength of the steel frame of the retaining back wall must meet the resistance to the soil pressure on the back of the abutment without major deformation. The back wall panel 6 is made of ordinary A3 steel plate, and the back wall horizontal frame 7 is welded on one side of the back wall panel 6, and then the back wall vertical frame 8 is welded. The setting of the back wall vertical frame 8 corresponds to the longitudinal distribution beam 5, and the processing is completed. The rear retaining back wall is installed on the longitudinal secondary distribution beam 5 at position 1A of the first row of steel pipe piles, and the part where the back wall transverse skeleton 7 at the bottom of the retaining back wall contacts the longitudinal distribution beam 5 is welded firmly to complete the soil retaining Installation of the back wall.

The strut 9 is arranged between the retaining back wall and the longitudinal sub-distributing beam 5, and plays the role of transferring the side pressure of the back filling path 13 of the trestle abutment to the steel pipe pile foundation. The strut 9, the retaining back wall and the lateral Between the longitudinal secondary distribution beams 5 is a triangular structure. In order to ensure that the skeleton structure of the retaining back wall is evenly stressed, a crossbeam skeleton 10 is installed between the strut 9 and the vertical skeleton 8 of the retaining back wall, and the strength of the brace 9 must meet the soil load borne by the retaining back wall structure. Pressure, at this moment, the bottom of strut 9 is welded firmly with longitudinal sub-distributing beam 5, and crossbeam skeleton 10 is installed on the top and welded tightly between vertical skeleton 8 of retaining wall. For the convenience of construction, after the struts 9, beam skeleton 10, retaining back wall, and longitudinal secondary distribution beam 5 are fixed in the above-mentioned manner, the longitudinal secondary distribution beam 5 is welded and fixed on the horizontal main distribution beam.

Next, install the construction structure of the trestle bridge. When installing the first row of steel pipe piles 1A and the top Bailey sheet 11 of the second row of steel pipe piles 1B, connect the vertical bar of the Bailey sheet 11 to the beam skeleton 10 at the top of the strut 9. Tighten the space between them, and use the door-type positioning card 14 to fix the Bailey sheet 11 and the second row of transverse main distribution beams 2B on the top of the second row of steel pipe piles 1B firmly, and install the trestle bridge deck structure 16.

Finally finish the backfilling of the backfilling access road 13 of the platform back, and carry out hardening treatment, lay telescopic steel plate 12 between the wiring filling access road 13 and the trestle deck structure 16, play the connection filling access road 13 and the trestle bridge deck structure 16 The role of smooth connection between.

It should be noted that the above specific embodiments are only used to illustrate the technical solution of the utility model without limitation. Although the utility model has been described in detail with reference to examples, those of ordinary skill in the art should understand that the technical solution of the utility model can be Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the utility model shall be covered by the claims of the utility model.

Claims (8)

1. An abutment structure, comprising: steel pipe piles; it is characterized in that, also includes: retaining back wall, horizontal main distribution beam, longitudinal secondary distribution beam; described steel pipe piles are arranged on the side slope of trestle junction access road, The horizontal main distribution beam is arranged on the top of the steel pipe pile along the horizontal bridge direction, the longitudinal secondary distribution beam is arranged on the horizontal main distribution beam along the longitudinal bridge direction, and the soil retaining back plate is vertically fixed on the horizontal bridge direction Longitudinal secondary distribution beams. 2. The abutment structure according to claim 1, further comprising: struts; said struts are arranged between said retaining back wall and said longitudinal sub-distributing beam, and struts, soil retaining There is a triangular structure between the back wall and the horizontal and vertical beams. 3. The abutment structure according to claim 2, wherein the steel pipe piles comprise: a first row of steel pipe piles and a second row of steel pipe piles; the first row of steel pipe piles is arranged near the trestle On one side of the access road, the second row of steel pipe piles is arranged on one side of the bridge body, and each steel pipe pile is connected and fixed by a horizontal connection system 4 and a longitudinal connection system 3; The transverse main distribution beam includes: a first transverse main distribution beam and a second transverse main distribution beam; the first transverse main distribution beam is arranged on the top of the first row of steel pipe piles, and the second transverse main distribution beam is arranged on At the top of the second row of steel pipe piles, the tops of the first transverse main distribution beam and the second transverse main distribution beam are fixedly connected with the longitudinal secondary distribution beam; The retaining back wall is fixed on the longitudinal secondary distribution beam at the top of the first row of steel pipe piles. 4. The abutment structure according to claim 3, further comprising: a beam skeleton; The retaining back wall includes: a steel plate, a transverse framework, and a vertical framework; the transverse framework is fixed on one side of the steel plate, the vertical framework is fixed on the transverse framework, and the vertical framework and the longitudinal The secondary distribution beam corresponds to and is perpendicular to the longitudinal secondary distribution beam; One end of the strut is fixed on the longitudinal secondary distribution beam, and the other end of the strut is fixed to the vertical skeleton of the retaining back wall through the beam skeleton. 5. The abutment structure according to claim 4, wherein the width of the retaining back wall is equal to the design width of the trestle plus the design height of the retaining back wall. 6. The abutment structure as claimed in claim 4 or 5, characterized in that, it also comprises: a Bailey sheet and a door-shaped positioning card; after the vertical bar of the Bailey sheet is pressed tightly against the beam skeleton, it passes through the The door-type positioning card is fixed on the second transverse main distribution beam. 7. The abutment structure according to any one of claims 3 to 5, wherein the distance between the first row of steel pipe piles and the second row of steel pipe piles is greater than the height of the retaining back wall. 8. abutment structure as claimed in claim 6, is characterized in that, the spacing between the first row of steel pipe piles and the second row of steel pipe piles is greater than the height of the retaining back wall.