CN209836778U - Light bridge abutment - Google Patents

Light bridge abutment Download PDF

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Publication number
CN209836778U
CN209836778U CN201920174814.5U CN201920174814U CN209836778U CN 209836778 U CN209836778 U CN 209836778U CN 201920174814 U CN201920174814 U CN 201920174814U CN 209836778 U CN209836778 U CN 209836778U
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China
Prior art keywords
abutment
bridge
steel reinforcement
reinforcement cage
pile foundation
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CN201920174814.5U
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Chinese (zh)
Inventor
王欣南
刘东升
李金龙
望开潘
董继恩
陈中治
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CCCC Second Highway Consultants Co Ltd
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WUHAN KINGSROAD TECHNOLOGY DEVELOPMENT Co Ltd
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Abstract

The utility model discloses a light-duty abutment relates to the bridge field, and this light-duty abutment is used for supporting bridge superstructure's load, and this light-duty abutment includes pile foundation, bent cap, back wall, headwall and chamfer. Set up main atress components such as pile foundation, bent cap from bottom to top, through a large amount of structure checking calculation and stability analysis, cross-sectional structure such as reinforced concrete is all adopted to back wall, otic placode, can reduce the platform body size effectively, alleviates abutment dead weight. The abutment adopts the bent cap to connect the design scheme of pile foundation, has guaranteed the overall stability of structure. The method can be adapted to objective conditions of steep terrain, poor geological conditions and the like in the mountainous area, the filling and digging amount is reduced, and the damage to the mountain surface environment is greatly reduced. When the bridge scheme is selected, the bridge hole arrangement can be optimized by adopting the bridge abutment, the bridge length is reduced, and the abutment retaining wall is normally connected with the road shoulder behind the abutment earwall, so that a large amount of bridge abutment conical slope can be cancelled, the damage degree of the mountain environment is reduced to the minimum degree, and the bridge abutment has remarkable environmental protection and economic benefits.

Description

Light bridge abutment
Technical Field
The utility model relates to a bridge field, concretely relates to light-duty abutment.
Background
With the implementation and improvement of national highway network planning in China, more and more mountain highway construction projects are provided at present. Because mountain area topography is steep, the abutment often sets up on steeper cutting slope, and these positions geological conditions are complicated various for mountain area abutment design becomes the key point of bridge design.
The bridge abutment is an important component of the bridge, has the functions of supporting a bridge span structure and connecting roads on two banks, and can not only retain soil and protect the banks, but also bear the filling pressure after abutment and the additional soil side pressure generated by vehicle load. Therefore, the abutment itself is required to have sufficient strength, rigidity, and stability, and also has a certain requirement for the bearing capacity of the foundation, the amount of settlement, the frictional resistance between the foundation and the foundation, and the like.
At present, the commonly used bridge abutment form in the mountain area highway construction is mainly a gravity type U-shaped bridge abutment, a pile type bridge abutment and a rib plate abutment.
The gravity type U-shaped abutment has the main defects that: 1) the abutment has larger volume and dead weight; 2) the abutment generally adopts large-volume grouted rubbles or rubble concrete, and the construction quality is difficult to control. 3) Along with the increase of the height of the bridge abutment, the requirement on the bearing capacity of the bridge site area is higher, and the method is suitable for large and medium bridges with larger foundation bearing capacity and filling height below 8-10 meters; 4) when the abutment is located at a place with a steep longitudinal and transverse gradient, in order to ensure the safety distance of the foundation and prevent the foundation from being empty, the foundation is generally buried deeper, and the abutment is designed to be higher, so that the excavation amount at the abutment is greatly increased, a higher side slope is formed, and the protection engineering amount is increased.
The traditional pile type bridge abutment and rib plate abutment have the main defects that a conical slope needs to be arranged in front of the bridge abutment, particularly on a mountain road, the slope is steep, the terrain is complex, the amount of the conical slope of the bridge abutment is large, if the slope rate of the conical slope is close to the slope rate of the original ground, the conical slope is difficult to arrange, the conical slope cannot be constructed and compacted, the terrain is greatly improved, and the environment is greatly damaged; or the side span waste is caused by deep excavation, and secondary disasters such as slope instability and the like are easily caused.
Gravity type U-shaped abutment usually needs to have great excavation to the massif, has to a great extent to the vegetation in mountain area. The pile type bridge abutment and the ribbed slab abutment usually need to be provided with a taper slope to protect the stability of the bridge abutment structure, and the damage of the large-volume bridge abutment taper slope to the mountain area environment and the earth surface vegetation is also huge. Does not conform to the core construction concept of the resource-saving society and the environment-friendly society.
In the pile-column type abutment designed or built in the past, the earwalls are generally designed to be trapezoidal, the integral stability of the abutment structure is usually ensured by means of a large amount of conical slopes, and the ecological environment around the abutment is seriously damaged by the conical slopes artificially constructed in mountainous areas.
In summary, there is a need for a bridge abutment for mountainous areas, which has a simple design, a light self-weight, a controllable quality, and a convenient construction, and does not require large-area ecological destruction (which does not require the phenomena of setting a conical slope or digging a mountain body, etc., which seriously affect the environment) during construction.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims to provide a design is simple, the quality is light-duty relatively, build easy light-duty abutment that has the rectangle otic placode to overcome the abutment in the above-mentioned current mountain area when building, need establish the problem that the peripheral ecology of abutment is seriously destroyed such as taper slope or excavation massif, and the design of the otic placode of traditional abutment causes the very limited problem of retaining capacity for trapezoidal shape.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
a lightweight abutment for supporting the load of a bridge superstructure, comprising:
at least 2 pile foundations, one end of each pile foundation is arranged in the soil layer; and
the capping beam is arranged on the pile foundation and used for supporting the load of the upper structure of the bridge, and at least 2 support base cushion stones are arranged on the capping beam;
the pile foundation and the cover beam are both of reinforced concrete structures internally provided with steel reinforcement cages, and the steel reinforcement cages of the pile foundation and the cover beam form an integrated structure.
On the basis of the scheme: the main stressed steel bars of the pile foundation are arranged in the vertical direction, and the main stressed steel bars of the cover beam are arranged in the horizontal direction.
On the basis of the scheme, the method further comprises the following steps:
a back wall arranged on the capping beam and used for retaining soil back to the soil,
the back wall is of a reinforced concrete structure with a steel reinforcement cage arranged inside, the steel reinforcement cage of the back wall and the steel reinforcement cage of the cover beam are integrated, and the steel reinforcement of the back wall is arranged in the horizontal direction.
On the basis of the scheme, the method further comprises the following steps:
a rectangular ear blocking wall which is arranged at one end of the cover beam and is used for laterally blocking soil,
the earwall is of a reinforced concrete structure with a steel reinforcement cage arranged inside, and the steel reinforcement cage of the earwall is fixedly connected with the steel reinforcement cage of the cover beam and the steel reinforcement cage of the back wall respectively.
On the basis of the scheme, the method further comprises the following steps:
the two ear walls are rectangular and are respectively arranged at the two ends of the bent cap and are respectively used for blocking soil from the side direction,
the earwall is of a reinforced concrete structure with a steel reinforcement cage arranged inside, and the steel reinforcement cage of the earwall is fixedly connected with the steel reinforcement cage of the cover beam and the steel reinforcement cage of the back wall respectively.
On the basis of the scheme: wherein, the both ends of bent cap have the dog respectively, and this dog is arranged in carrying out horizontal location to the girder in the bridge superstructure.
On the basis of the scheme: wherein the height of the bent cap ranges from 1.5 m to 2.5 m.
On the basis of the scheme: wherein the diameter range of the pile foundation is 1.0 meter to 2.5 meters.
Compared with the prior art, the utility model has the advantages of:
the utility model provides a light-duty abutment because include: at least 2 pile foundations, one end of each pile foundation is arranged in the soil layer; the capping beam is arranged on the pile foundation and used for supporting the load of the upper structure of the bridge, and at least 2 support base cushion stones are arranged on the capping beam; the pile foundation and the cover beam are both of reinforced concrete structures internally provided with steel reinforcement cages, and the steel reinforcement cages of the pile foundation and the cover beam form an integrated structure. The reinforcing bar of pile foundation sets up for vertical direction, and the reinforcing bar of bent cap sets up for the horizontal direction. Therefore, the light abutment provided by the utility model saves structures such as a bearing platform and a front wall needed by the conventional abutment, and adopts a cover beam and a pile foundation seat stress structure from top to bottom, so that the light abutment not only can safely support the load of the upper structure of the bridge, but also has low cost for constructing the abutment, less material consumption and capability of saving manpower and financial resources to the maximum extent; in addition, a large amount of abutment conical slopes are not needed during construction, so that the damage degree of the mountain environment is reduced to the minimum degree, and the method has obvious environmental protection and economic benefits.
The utility model provides a light-duty abutment because have the otic placode, and the otic placode changes the rectangle from original trapezoidal, can improve the retaining capacity of otic placode greatly, needs trapezoidal otic placode to keep off the soil and can't hard need establish the gross coning slope and then destroy the mountain area vegetation before having avoided.
Drawings
Fig. 1 is a schematic front structural view of a light abutment in an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example 1
Fig. 1 is a schematic front structural view of a light abutment in an embodiment of the present invention.
Referring to fig. 1, embodiments of the present invention provide a light bridge abutment for supporting the load of a bridge superstructure, which includes a pile foundation 1, a capping beam 2, a back wall 3, a stud 4, and a chamfer.
Pile foundation 1, pile foundation 1's one end setting is in the soil layer for support comes from the load of bent cap 2, and with this load transmission to the soil layer, 4 pile foundations 1 are arranged side by side. The diameter range of the pile foundation 1 is 1.0 meter to 2.5 meters. In this embodiment, the diameter of the pile foundation 1 is 1.8 meters.
And the cover beam 2 is arranged on the pile foundation 1, the cover beam 2 comprises a support cushion 21 and a stop block 22, and the cover beam 2 is used for supporting the load of the upper structure of the bridge.
And 5 parallel support cushion stones 21 are arranged on the cover beam 2, and the support cushion stones 21 are used for placing bridge supports. Through the bridge support, the bridge superstructure transfers its load to the support padstones 21 of the capping beam 2 and thus to the capping beam 2.
The capping beam 2 has stoppers 22 at both ends thereof, respectively, and the stoppers 22 are used for laterally positioning the main beam in the bridge superstructure.
The height of the capping beam 2 ranges from 1.5 m to 2.5 m, and in this embodiment, the height of the capping beam 2 is 1.7 m.
Wherein, pile foundation 1 and bent cap 2 are the reinforced concrete structure who establishes the steel reinforcement cage in, and the steel reinforcement cage of pile foundation 1 and the steel reinforcement cage of bent cap 2 form the integral structure. The main stressed steel bar of the pile foundation 1 is arranged in the vertical direction, and the main stressed steel bar of the bent cap 2 is arranged in the horizontal direction.
The diameter range of the pile foundation 1 and the height range of the cover beam 2 are obtained through a large number of structure checking calculations, stability analysis and experimental simulation tests.
Back wall 3, set up on bent cap 2 for the retaining soil dorsad, back wall 3 establishes the reinforced concrete structure of steel reinforcement cage for inside, and the steel reinforcement cage of back wall 3 forms an organic whole with the steel reinforcement cage of bent cap 2, and the main atress reinforcing bar of back wall 3 sets up for the horizontal direction.
A stifled otic placode 4, for the rectangle, sets up the one end at bent cap 2 for the side direction keeps off the soil, and otic placode 4 establishes the reinforced concrete structure of steel reinforcement cage in for, and the steel reinforcement cage of otic placode 4 respectively with the steel reinforcement cage of bent cap 2, the steel reinforcement cage fixed connection of back wall 3, so is applicable to the bridge construction of integral road bed.
And the chamfering is a reinforced concrete structure with a built-in reinforcement cage, the reinforcement cage of the chamfering is integrally connected with the reinforcement cage of the cover beam 2, the reinforcement cage of the back wall 3 and the reinforcement cage of the ear wall 4 respectively, and the chamfering is used for reinforcing the connection between the cover beam 2 and the ear wall 4 and the connection between the back wall 3 and the ear wall 4.
Example 2
The light bridge abutment in the embodiment is formed by adding a blocking wall 4 on the basis of the light bridge abutment in the embodiment 1, wherein the two blocking walls 4 are respectively symmetrically arranged at two ends of the cover beam 2 and are respectively used for blocking soil from two lateral directions, and other structures of the light bridge abutment in the embodiment are the same as those of the light bridge abutment in the embodiment 1.
The two ear walls 4 in this embodiment are symmetrically arranged at the two ends of the bent cap 2, so that the two ear walls are suitable for a bridge structure of a separate roadbed.
Effects of the embodiment:
the lightweight abutment in this embodiment, because it includes: at least 2 pile foundations, one end of each pile foundation is arranged in the soil layer; the capping beam is arranged on the pile foundation and used for supporting the load of the upper structure of the bridge, and at least 2 support base cushion stones are arranged on the capping beam; the pile foundation and the cover beam are both of reinforced concrete structures internally provided with steel reinforcement cages, and the steel reinforcement cages of the pile foundation and the cover beam form an integrated structure. The reinforcing bar of pile foundation sets up for vertical direction, and the reinforcing bar of bent cap sets up for the horizontal direction. Therefore, the light bridge abutment provided by the embodiment omits structures such as a bearing platform, a front wall and the like required by a conventional bridge abutment, and adopts a capping beam and a pile foundation stress structure from top to bottom, so that the light bridge abutment not only can safely support the load of the upper structure of the bridge, but also has low manufacturing cost and less material consumption, and can save manpower and financial resources to the greatest extent; in addition, a large amount of abutment conical slopes are not needed during construction, so that the damage degree of the mountain environment is reduced to the minimum degree, and the method has obvious environmental protection and economic benefits.
The light bridge abutment in the embodiment is provided with the ear walls, and the ear walls are changed into rectangles from original trapezoids, so that the roadbed retaining wall can be conveniently connected with the bridge abutment in a forward mode, and the problem that large-volume conical slopes need to be built on the previous trapezoidal ear walls to damage vegetation in mountainous areas is avoided.
The present invention is not limited to the above preferred embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is within the scope of protection.

Claims (8)

1. A lightweight abutment for supporting the load of a bridge superstructure, comprising:
at least 2 pile foundations, wherein one end of each pile foundation is arranged in a soil layer; and
the capping beam is arranged on the pile foundation and used for supporting the load of the upper structure of the bridge, and at least 2 support base cushion stones are arranged on the capping beam;
the pile foundation and the cover beam are both of reinforced concrete structures internally provided with steel reinforcement cages, and the steel reinforcement cage of the pile foundation and the steel reinforcement cage of the cover beam form an integrated structure.
2. The abutment of claim 1, wherein:
the main stressed steel bars of the pile foundation are arranged in the vertical direction, and the main stressed steel bars of the cover beam are arranged in the horizontal direction.
3. The abutment of claim 1, further comprising:
a back wall arranged on the capping beam and used for keeping earth back,
the back wall is of a reinforced concrete structure with a steel reinforcement cage arranged inside, and the steel reinforcement cage of the back wall and the steel reinforcement cage of the cover beam are integrated.
4. The abutment of claim 3, further comprising:
a rectangular ear blocking wall which is arranged at one end of the cover beam and is used for laterally blocking soil,
the earwall is of a reinforced concrete structure with a steel reinforcement cage arranged inside, and the steel reinforcement cage of the earwall is fixedly connected with the steel reinforcement cage of the cover beam and the steel reinforcement cage of the back wall respectively.
5. The abutment of claim 3, further comprising:
the two ear walls are rectangular and are respectively arranged at the two ends of the bent cap and are respectively used for blocking soil from the side direction,
the earwall is of a reinforced concrete structure with a steel reinforcement cage arranged inside, and the steel reinforcement cage of the earwall is fixedly connected with the steel reinforcement cage of the cover beam and the steel reinforcement cage of the back wall respectively.
6. The abutment of claim 1, wherein:
and two ends of the cover beam are respectively provided with a stop block, and the stop blocks are used for transversely positioning the main beam in the bridge superstructure.
7. An abutment as claimed in any one of claims 4 or 5, wherein:
wherein the height of the bent cap ranges from 1.5 m to 2.5 m.
8. The abutment of claim 1, wherein:
wherein the diameter range of the pile foundation is 1.0-2.5 m.
CN201920174814.5U 2019-01-31 2019-01-31 Light bridge abutment Active CN209836778U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622129A (en) * 2020-06-08 2020-09-04 浙江万里建设工程有限公司 Locking anchor bolt and cliff abutment construction method applying same
CN111794071A (en) * 2020-07-06 2020-10-20 上海崇明水利工程有限公司 Water conservancy bridge structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622129A (en) * 2020-06-08 2020-09-04 浙江万里建设工程有限公司 Locking anchor bolt and cliff abutment construction method applying same
CN111622129B (en) * 2020-06-08 2021-08-24 浙江万里建设工程有限公司 Locking anchor bolt and cliff abutment construction method applying same
CN111794071A (en) * 2020-07-06 2020-10-20 上海崇明水利工程有限公司 Water conservancy bridge structure

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Effective date of registration: 20200122

Address after: 430056 No. 18, entrepreneurial road, Wuhan economic and Technological Development Zone, Hubei, Wuhan

Patentee after: China Communications Second Highway Survey Design and Research Institute Co., Lt

Address before: 430000 floor 3, block B, Huayuan Business Plaza, No. 16, Liye Road, Caidian District, Wuhan, Hubei Province

Patentee before: Wuhan Kingsroad Technology Development Co., Ltd.