阅读说明：本技术 一种防止桥头跳车的半刚性基层及施工工艺 (Semi-rigid base layer for preventing bumping at bridge head and construction process ) 是由 肖桂元 丁健 殷乐 刘学才 杨彦军 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种防止桥头跳车的半刚性基层及施工工艺,通过第一刚性基层与桥头搭板固定连接,普通基层与第一刚性基层固定连接,第一半刚性基层与第一刚性基层固定连接,第二刚性基层与第一半刚性基层固定连接,第二半刚性基层与第二刚性基层固定连接,沥青混凝土面层与第二半刚性基层固定连接,第一土工栅格与第一半刚性基层固定连接,第二土工栅格与第二半刚性基层固定连接,其中第一半刚性基层和第二半刚性基层均由石灰、粉煤灰、碎石组配而成,第一半刚性基层和第二半刚性基层一侧与桥头搭板连接,另一侧与普通基层连接,使受到的荷载均匀分布,在桥头搭板和普通基层之间形成真正的过渡段,解决了桥台和路堤之间沉降不均匀的问题。(The invention discloses a semi-rigid base layer for preventing bump at bridge head and a construction process, wherein a first rigid base layer is fixedly connected with a bridge head butt strap, a common base layer is fixedly connected with the first rigid base layer, the first semi-rigid base layer is fixedly connected with the first rigid base layer, a second rigid base layer is fixedly connected with the first semi-rigid base layer, the second semi-rigid base layer is fixedly connected with the second rigid base layer, an asphalt concrete surface layer is fixedly connected with the second semi-rigid base layer, a first geogrid is fixedly connected with the first semi-rigid base layer, a second geogrid is fixedly connected with the second semi-rigid base layer, wherein the first semi-rigid base layer and the second semi-rigid base layer are assembled by lime, fly ash and broken stone, one side of the first semi-rigid base layer and one side of the second semi-rigid base layer are connected with the bridge head butt strap, the other side of the first semi-rigid base layer and the second semi-rigid base layer are connected with the common base layer, so that the load is uniformly distributed, and a real transition section is formed between the bridge head butt strap and the common base layer, the problem of subside inhomogeneous between abutment and the embankment is solved.)

1. The utility model provides a prevent semi-rigid basic unit of bridgehead bump, its characterized in that, includes bridgehead attachment strap, first rigid basic unit, ordinary basic unit, first semi-rigid basic unit, second semi-rigid basic unit, asphalt concrete surface course, first geogrid and second geogrid, first rigid basic unit with bridgehead attachment strap fixed connection to be located one side of bridgehead attachment strap, ordinary basic unit with first rigid basic unit fixed connection to be located keep away from one side of bridgehead attachment strap, first semi-rigid basic unit with first rigid basic unit fixed connection, and be located between bridgehead attachment strap and the ordinary basic unit, second rigid basic unit with first semi-rigid basic unit fixed connection, and be located keep away from one side of first rigid basic unit, second semi-rigid basic unit with second rigid basic unit fixed connection, and be located and keep away from one side of first semi-rigid basic unit, the asphalt concrete surface course with second semi-rigid basic unit fixed connection, and be located and keep away from one side of second rigid basic unit, first geogrid with first semi-rigid basic unit fixed connection, and be located inside the first semi-rigid basic unit, the second geogrid with second semi-rigid basic unit fixed connection, and be located second semi-rigid basic unit, first geogrid with first semi-rigid basic unit fixed connection, and be located inside the first semi-rigid basic unit, the second geogrid with second semi-rigid basic unit fixed connection, and be located inside the second semi-rigid basic unit.

2. The semi-rigid substrate of claim 1, wherein the semi-rigid substrate further comprises a first waterproofing membrane fixedly attached to the first rigid substrate and located on a side of the first rigid substrate remote from the first panel.

3. The semi-rigid substrate of claim 2, the semi-rigid base layer for preventing the bump at the bridge head further comprises a second waterproof coiled material, a third waterproof coiled material and a fourth waterproof coiled material, one side of the second waterproof coiled material is fixedly connected with the first rigid base layer, and is positioned at one side far away from the first waterproof coiled material, the other side of the second waterproof coiled material is fixedly connected with the first semi-rigid base layer, one side of the third waterproof coiled material is fixedly connected with the first semi-rigid base layer, and is positioned at one side far away from the second waterproof coiled material, the other side of the third waterproof coiled material is fixedly connected with the second rigid base layer, one side of the fourth waterproof coiled material is fixedly connected with the second rigid base layer, and the other side of the fourth waterproof coiled material is fixedly connected with the second semi-rigid base layer.

4. The semi-rigid substrate of claim 3, wherein the semi-rigid substrate further comprises a fifth waterproof coiled material, one side of the fifth waterproof coiled material is fixedly connected with the second semi-rigid substrate and is positioned on the side far away from the fourth waterproof coiled material, and the other side of the fifth waterproof coiled material is fixedly connected with the asphalt concrete surface layer.

5. A construction process of a semi-rigid substrate for preventing vehicle bump at bridge head, which is applied to manufacture the semi-rigid substrate for preventing vehicle bump at bridge head according to claims 1-4, and comprises the following steps:

cleaning the earth surface, leveling and digging a base space;

laying waterproof coiled materials and pouring a base material;

and paving asphalt concrete.

6. The semi-rigid base layer for preventing bump at bridge head and the construction process thereof as claimed in claim 5, wherein the specific way of laying the waterproof coiled material and pouring the base material is as follows: lay first waterproofing membrane and pour first rigid substrate in the basic unit space of digging out, treat lay second waterproofing membrane and pour first semi-rigid substrate after first rigid substrate solidifies, and first geogrid is laid to first semi-rigid substrate inside, treats third waterproofing membrane and pour second rigid substrate after first semi-rigid substrate solidifies, treats second rigid substrate is laid to fourth waterproofing membrane after second rigid substrate solidifies and is pour second semi-rigid substrate, and second geogrid is laid to second semi-rigid substrate inside, treats fifth waterproofing membrane is laid after second semi-rigid substrate solidifies.

7. The semi-rigid substrate for preventing bump at bridge head as claimed in claim 6, wherein the first rigid substrate and the second rigid substrate are made of the same material and are composed of lime, fly ash and broken stone.

8. The semi-rigid substrate for preventing bump at bridge head and the construction process thereof as claimed in claim 6, wherein the thickness of the first rigid substrate and the second rigid substrate is 8-10 cm.

9. The semi-rigid base layer for preventing the bump at the bridge head and the construction process thereof as claimed in claim 6, wherein the material composition of the first semi-rigid base layer and the second semi-rigid base layer are the same and are both made of C30 concrete.

10. The semi-rigid substrate for preventing bump at bridge head and the construction process thereof as claimed in claim 6, wherein the thickness of the first semi-rigid substrate and the second semi-rigid substrate are both 8-10 cm.

Technical Field

The invention relates to the technical field of highway design and construction, in particular to a semi-rigid base layer for preventing bumping at bridge head and a construction process.

Background

The problem of vehicle bump at the bridge head of the road and bridge transition section is always a difficult problem in road construction. The existing pile foundation at the lower part of the abutment is a rigid structure, the embankment is flexible, and can generate larger plastic deformation under the action of vehicle load, and the abutment and the embankment are obviously dislocated after a period of time due to different settlement rates of the abutment and the embankment, so that the vehicle jolts when running through the dislocated position, the driving comfort is seriously affected, the vehicle speed is reduced, and even the vehicle turns over reversely, and traffic accidents are caused.

Disclosure of Invention

The invention aims to provide a semi-rigid base layer for preventing bumping at the bridge head and a construction process, and aims to solve the problem of uneven settlement between a bridge abutment and an embankment.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a semi-rigid substrate for preventing bump at bridge head, comprising a bridge head patch, a first rigid substrate, a common substrate, a first semi-rigid substrate, a second semi-rigid substrate, an asphalt concrete facing, a first geogrid, and a second geogrid, the first rigid substrate being fixedly connected to the bridge head patch and located at one side of the bridge head patch, the common substrate being fixedly connected to the first rigid substrate and located at one side away from the bridge head patch, the first semi-rigid substrate being fixedly connected to the first rigid substrate and located between the bridge head patch and the common substrate, the second rigid substrate being fixedly connected to the first semi-rigid substrate and located at one side away from the first rigid substrate, the second semi-rigid substrate being fixedly connected to the second rigid substrate, and be located and keep away from one side of first semi-rigid basic unit, the asphalt concrete surface course with second semi-rigid basic unit fixed connection, and be located and keep away from one side of second rigid basic unit, first geogrid with first semi-rigid basic unit fixed connection, and be located inside the first semi-rigid basic unit, the second geogrid with second semi-rigid basic unit fixed connection, and be located inside the second semi-rigid basic unit.

Wherein, prevent that bridgehead from jumping semi-rigid basic unit of car still includes first waterproofing membrane, first waterproofing membrane with first rigid basic unit fixed connection to be located and keep away from one side of first board rigid basic unit.

Wherein, prevent that bridgehead from jumping semi-rigid basic unit of car still includes second waterproofing membrane, third waterproofing membrane and fourth waterproofing membrane, one side of second waterproofing membrane with first rigidity basic unit fixed connection, and be located and keep away from one side of first waterproofing membrane, second waterproofing membrane's opposite side with first semi-rigid basic unit fixed connection, one side of third waterproofing membrane with first semi-rigid basic unit fixed connection, and be located and keep away from one side of second waterproofing membrane, the opposite side of third waterproofing membrane with second rigidity basic unit fixed connection, one side of fourth waterproofing membrane with second rigidity basic unit fixed connection, and be located and keep away from one side of third waterproofing membrane, the opposite side of fourth waterproofing membrane with second semi-rigid basic unit fixed connection.

Wherein, prevent that the semi-rigid basic unit of bridgehead skip still includes fifth waterproof coiled material, one side of fifth waterproof coiled material with second semi-rigid basic unit fixed connection to be located keeps away from one side of fourth waterproof coiled material, the opposite side of fifth waterproof coiled material with asphalt concrete surface course fixed connection.

The invention provides a semi-rigid base layer construction process for preventing bumping at bridge head, which comprises the following steps:

cleaning the earth surface, leveling and digging a base space;

laying waterproof coiled materials and pouring a base material;

and paving asphalt concrete.

Wherein, lay waterproofing membrane, the concrete mode of pouring the base material does: lay first waterproofing membrane and pour first rigid substrate in the basic unit space of digging out, treat lay second waterproofing membrane and pour first semi-rigid substrate after first rigid substrate solidifies, and first geogrid is laid to first semi-rigid substrate inside, treats third waterproofing membrane and pour second rigid substrate after first semi-rigid substrate solidifies, treats second rigid substrate is laid to fourth waterproofing membrane after second rigid substrate solidifies and is pour second semi-rigid substrate, and second geogrid is laid to second semi-rigid substrate inside, treats fifth waterproofing membrane is laid after second semi-rigid substrate solidifies.

The first rigid base layer and the second rigid base layer are made of the same materials and are formed by lime, fly ash and broken stone.

Wherein the thickness of the first rigid base layer and the second rigid base layer is 8-10 cm.

The first semi-rigid base layer and the second semi-rigid base layer are made of the same material composition and are both made of C30 concrete.

Wherein the thickness of the first semi-rigid base layer and the second semi-rigid base layer are both 8-10 cm.

The invention relates to a semi-rigid base layer for preventing bump at the bridge head, which is fixedly connected with a bridge head butt strap through a first rigid base layer and is positioned at one side of the bridge head butt strap, a common base layer is fixedly connected with the first rigid base layer and is positioned at one side far away from the bridge head butt strap, a first semi-rigid base layer is fixedly connected with the first rigid base layer and is positioned between the bridge head butt strap and the common base layer, a second rigid base layer is fixedly connected with the first semi-rigid base layer and is positioned at one side far away from the first rigid base layer, a second semi-rigid base layer is fixedly connected with the second rigid base layer and is positioned at one side far away from the first semi-rigid base layer, an asphalt concrete surface layer is fixedly connected with the second semi-rigid base layer and is positioned at one side far away from the second rigid base layer, and a first geogrid is fixedly connected with the first semi-rigid base layer, and the second geogrid is fixedly connected with the second semi-rigid base layer and is positioned on the second semi-rigid base layer, so that the problem of uneven settlement between the abutment and the embankment is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a semi-rigid substrate for preventing bump at the bridge head;

fig. 2 is a flow chart of a semi-rigid substrate construction process for preventing bump at the bridge head.

1-bridge head butt strap, 2-first rigid base layer, 3-common base layer, 4-first semi-rigid base layer, 5-second rigid base layer, 6-second semi-rigid base layer, 7-asphalt concrete surface layer, 8-first waterproof coiled material, 9-second waterproof coiled material, 10-third waterproof coiled material, 11-fourth waterproof coiled material, 12-fifth waterproof coiled material, 13-first geogrid and 14-second geogrid.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must be constructed and operated in a specific orientation and thus should not be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, according to a first convenience, the present invention provides a semi-rigid substrate for preventing bump at a bridge head, comprising a bridge head access board 1, a first rigid substrate 2, a common substrate 3, a first semi-rigid substrate 4, a second rigid substrate 5, a second semi-rigid substrate 6, an asphalt concrete surface layer 7, a first geogrid 13 and a second geogrid 14, wherein the first rigid substrate 2 is fixedly connected with the bridge head access board 1 and located at one side of the bridge head access board 1, the common substrate 3 is fixedly connected with the first rigid substrate 2 and located at one side far from the bridge head access board 1, the first semi-rigid substrate 4 is fixedly connected with the first rigid substrate 2 and located between the bridge head access board 1 and the common substrate 3, the second rigid substrate 5 is fixedly connected with the first semi-rigid substrate 4 and located at one side far from the first rigid substrate 2, second semi-rigid base 6 with second rigid base 5 fixed connection to be located keep away from one side of first semi-rigid base 4, asphalt concrete surface course 7 with second semi-rigid base 6 fixed connection, and be located keep away from one side of second rigid base 5, first geogrid 13 with first semi-rigid base 4 fixed connection, and be located inside first semi-rigid base 4, second geogrid 14 with second semi-rigid base 6 fixed connection, and be located inside second semi-rigid base 6.

In the embodiment, the first semi-rigid base layer 4 and the second semi-rigid base layer 6 are arranged on the first rigid base layer 2 and the second rigid base layer 5, the first semi-rigid base layer 4 and the second semi-rigid base layer 6 are formed by assembling lime, fly ash and broken stone, one side of the first semi-rigid base layer 4 and the second semi-rigid base layer 6 is connected with the bridge head attachment plate 1, the other side of the first semi-rigid base layer 4 and the second semi-rigid base layer 6 is connected with the common base layer 3, the first geogrid 13 and the second geogrid 14 are arranged in the first semi-rigid base layer 4 and the second semi-rigid base layer 6, the ultimate tensile strength of the first geogrid 13 and the second geogrid 14 is greater than 40kN/M, the tensile strength at 2% elongation is greater than 15kN/M, so that the received load is uniformly distributed and is soft in the middle, a real transition section is formed between the bridge head butt strap 1 and the common base layer 3, so that the settlement difference between the bridge head and the embankment is obviously reduced, and the problem of uneven settlement between the abutment and the embankment is solved.

Further, prevent that bridgehead from jumping semi-rigid base layer of car still includes first waterproofing membrane 8, first waterproofing membrane 8 with first rigid base layer 2 fixed connection to be located and keep away from one side of first board rigid base layer.

In this embodiment, the first waterproofing membrane 8 inevitably permeates water into the first rigid base layer 2, and reduces the roadbed bearing capacity.

Further, the semi-rigid base layer for preventing bump at the bridge head further comprises a second waterproof coiled material 9, a third waterproof coiled material 10 and a fourth waterproof coiled material 11, one side of the second waterproof coiled material 9 is fixedly connected with the first rigid base layer 2, and is positioned at one side far away from the first waterproof coiled material 8, the other side of the second waterproof coiled material 9 is fixedly connected with the first semi-rigid base layer 4, one side of the third waterproof coiled material 10 is fixedly connected with the first semi-rigid base layer 4, and is positioned at one side far away from the second waterproof coiled material 9, the other side of the third waterproof coiled material 10 is fixedly connected with the second rigid base layer 5, one side of the fourth waterproof coiled material 11 is fixedly connected with the second rigid base layer 5, and is positioned at one side far away from the third waterproof coiled material 10, and the other side of the fourth waterproof coiled material 11 is fixedly connected with the second semi-rigid base layer 6.

In this embodiment, the second waterproof roll 9, the third waterproof roll 10 and the fourth waterproof roll 11 separate the first rigid base layer 2, the first semi-rigid base layer 4, the second rigid base layer 5 and the second semi-rigid base layer 6 from each other, so that the mutual permeation of accumulated water is avoided, and the bearing capacity of the roadbed is reduced.

Further, prevent that the semi-rigid basic unit of bridgehead skip still includes fifth waterproof coiled material 12, one side of fifth waterproof coiled material 12 with 6 fixed connection of second semi-rigid basic unit, and be located and keep away from one side of fourth waterproof coiled material 11, the opposite side of fifth waterproof coiled material 12 with asphalt concrete surface course 7 fixed connection.

In this embodiment, the fifth waterproof roll 12 prevents the asphalt concrete surface layer 7 from penetrating into the second semi-rigid base layer 6, thereby reducing the roadbed bearing capacity.

Referring to fig. 2, in a second aspect, the present invention provides a semi-rigid base layer construction process for preventing a vehicle bump at a bridge head, including:

s101, cleaning the ground surface, leveling and digging a base space;

the base layer space is trapezoidal, the length is more than 4m, and the gradient is 1: 1.

S102, laying waterproof coiled materials and pouring a base material;

laying a first waterproof coiled material 8 and pouring a first rigid base layer 2 in the excavated base layer space, laying a second waterproof coiled material 9 after the first rigid base layer 2 is solidified to pour a first semi-rigid base layer 4, laying a first geogrid 13 inside the first semi-rigid base layer 4, laying a third waterproof coiled material 10 and pouring a second rigid base layer 5 after the first semi-rigid base layer 4 is solidified, laying a fourth waterproof coiled material 11 after the second rigid base layer 5 is solidified to pour a second semi-rigid base layer 6, laying a second geogrid 14 inside the second semi-rigid base layer 6, laying a fifth waterproof coiled material 12 after the second semi-rigid base layer 6 is solidified, wherein the first rigid base layer 2 and the second rigid base layer 5 are the same in material component and are formed by lime, fly ash and gravel in matching, and the compression resilience modulus is 800-1500 Mpa, half rigid base 5's design life is not less than 40 years, first rigid base 2 with the thickness of second rigid base 5 is 8-10cm, and inside has laid geogrid, and geogrid ultimate tensile strength is greater than 40kN/M, and tensile strength when 2% elongation should be greater than 15kN/M, first half rigid base 4 with the material composition of second half rigid base 6 is the same, forms by C30 concrete pavement, first half rigid base 4 with the thickness of second half rigid base 6 is 8-10 cm.

S103, paving asphalt concrete.

The asphalt concrete can effectively protect the second semi-rigid base layer 6 from being damaged, and the gaps on the surface of the second semi-rigid base layer 6 are filled to provide stability for the road surface.

Although the above disclosure is directed to a semi-rigid substrate and a construction process for preventing vehicle bump at bridge head, the scope of the present invention should not be limited thereto, and it will be understood by those skilled in the art that all or part of the process flow of the above embodiments may be implemented and equivalents thereof may be made without departing from the scope of the present invention.