CN212834812U

CN212834812U - Light filler widens mosaic structure on weak road bed

Info

Publication number: CN212834812U
Application number: CN202020949220.XU
Authority: CN
Inventors: 唐震; 程小亮; 赵宇; 王阳; 赵乾文; 赵振军
Original assignee: Wisdri Engineering and Research Incorporation Ltd; Wisdri Urban Construction Engineering Technology Co Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd; Wisdri Urban Construction Engineering Technology Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-03-30
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a mosaic structure is widened on weak road bed to light filler, including old road bed and EPS block, the EPS block is connected with the old roadbed outside, and sand cushion and waterproof geotechnological cloth have been laid in proper order to EPS block below, and cast-in-place reinforced concrete apron has been laid to the top layer of EPS block, and cast-in-place reinforced concrete apron stretches into to old roadbed. The utility model discloses economic cost is low, and simple structure can effectively promote the old and new road bed overall stability of highway, reduces the uneven settlement between the old and new road bed, reduces the disease quantity that arouses because of the uneven settlement of old and new road bed.

Description

Light filler widens mosaic structure on weak road bed

Technical Field

The utility model relates to a construction technical field, concretely relates to mosaic structure is widened on weak road bed to light filler.

Background

When a highway in a soft soil area is widened and reformed, diseases such as longitudinal cracks, wrong platforms and even instability of the roadbed and the like caused by differential settlement of a new roadbed and an old roadbed often occur, and the service condition of the roadbed is seriously influenced.

Disclosure of Invention

The to-be-solved technical problem of the utility model is, to the above-mentioned defect that prior art exists, provide a mosaic structure is widened to light filler on weak road bed, economic cost is low, and simple structure can effectively promote the old and new road bed overall stability of highway, reduces the differential settlement between the old and new road bed, reduces the disease quantity that arouses because of old and new road bed differential settlement.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:

the utility model provides a mosaic structure is widened to light filler on weak road bed, includes old road bed and EPS block, and the EPS block is connected with the old road bed outside, and sand cushion layer and waterproof geotechnological cloth have been laid in proper order to EPS block below, and cast in situ reinforced concrete apron has been laid to the top layer of EPS block, and cast in situ reinforced concrete apron stretches into to old road bed.

According to the technical scheme, the edge of the connecting side of the old roadbed and the EPS block body is of a step-shaped structure, and the EPS block body is connected with the old roadbed through the step-shaped structure.

According to the technical scheme, the sand cushion layer and the waterproof geotextile are sequentially paved on each layer of step at the edge of the old roadbed.

According to the technical scheme, the thickness of the sand cushion layer laid on the step is 10-20 cm.

According to the technical scheme, the width of each layer of step at the edge of the old roadbed is 1.5-2 m.

According to the technical scheme, the EPS blocks comprise EPS blocks which are paved layer by layer from bottom to top in a staggered manner.

According to the technical scheme, adjacent layers of EPS blocks are connected through EPS block connecting pieces;

the EPS block connecting piece comprises a base plate, wherein the size of the base plate is equal to that of the bottom surface of an EPS block, and flanges are uniformly arranged on the edges of the upper side and the lower side of the base plate and are in a sawtooth shape.

According to the technical scheme, the cast-in-place reinforced concrete cover plate extends into the old roadbed by at least 3 m;

the thickness of the sand cushion layer laid on the roadbed construction reference surface is 20 cm.

According to the technical scheme, emulsified asphalt and waterproof geotextile are sequentially laid between the cast-in-place reinforced concrete cover plate and the EPS block, the side face of the EPS block is completely covered by the waterproof geotextile, and the waterproof geotextile above the EPS block is connected with the upper surface of the top layer of the EPS block through the steel bar anchor.

According to the technical scheme, the outer edge of the EPS block body is connected with a soil wrapping edge, the soil wrapping edge is formed by filling soil, and the width of the soil wrapping edge is 1.5 m.

The utility model discloses following beneficial effect has:

the utility model discloses a new and old road bed of concatenation is widened to EPS block light packing, and economic cost is low, and simple structure can effectively promote the new and old road bed overall stability of highway, reduces the differential settlement between the new and old road bed, reduces the disease quantity that arouses because of new and old road bed differential settlement.

Drawings

Fig. 1 is a schematic structural diagram of a light filler widening splicing structure on a weak roadbed in the embodiment of the utility model;

fig. 2 is a schematic structural view of a steel bar anchor in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an EPS block connector in an embodiment of the present invention;

in the figure, 1-roadbed construction datum plane, 2-sand cushion layer, 3-EPS block, 4-waterproof geotextile, 5-cast-in-place reinforced concrete cover plate, 6-filling, 7-reinforcing steel anchor, 8-EPS block connecting piece, 9-backing plate and 10-flange.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1-3 shown, the utility model provides an in the embodiment light filler broadens mosaic structure on weak road bed, including old road bed and EPS block 3, EPS block 3 is connected with the old road bed outside, and as the new road bed of widening, by supreme sand bed layer 2 and waterproof geotechnological cloth 4 of having laid in proper order on the road bed construction reference surface 1 of EPS block 3 below, cast in situ reinforced concrete apron 5 has been laid to EPS block 3's top layer, and cast in situ reinforced concrete apron 5 stretches into to old road bed.

Further, the border of old roadbed and EPS block 3 connection side is step-like structure, and EPS block 3 is connected with old roadbed through step-like structure.

Furthermore, a sand cushion layer 2 and a waterproof geotextile 4 are laid on each layer of steps at the edge of the old roadbed from bottom to top in sequence.

Further, the thickness of the sand cushion layer 2 laid on the step is 10-20 cm; the sand cushion layer 2 mainly functions as a drainage sand cushion layer 2.

Furthermore, the width of each layer of step at the edge of the old roadbed is 1.5-2 m.

Further, the EPS blocks 3 include EPS blocks which are laid layer by layer in a staggered manner from bottom to top.

Furthermore, the EPS blocks of adjacent layers are connected through EPS block connecting pieces 8;

the EPS block connecting piece 8 comprises a backing plate 9, the size of the backing plate 9 is equal to that of the bottom surface of an EPS block, flanges 10 are uniformly arranged on the edges of the upper side and the lower side of the backing plate 9, and the flanges 10 are in a sawtooth shape.

Further, the cast-in-place reinforced concrete cover plate 5 extends into the old roadbed by at least 3 m;

the thickness of the sand cushion layer 2 laid on the roadbed construction reference surface 1 is 20 cm; the sand cushion layer 2 has the functions of leveling and draining.

Further, emulsified asphalt and waterproof geotextile 4 are laid between the cast-in-place reinforced concrete cover plate 5 and the EPS block 3 in sequence from bottom to top, the waterproof geotextile 4 completely covers the side surface of the EPS block 3, the waterproof geotextile 4 above the EPS block 3 is connected with the upper surface of the top layer of the EPS block 3 through a steel bar anchor 7, and a triangular gap cannot be left between the waterproof geotextile 4 and the EPS block 3.

Further, the steel bar anchor 7 has an inverted U shape.

Furthermore, the outer edge of the EPS block 3 is connected with a soil wrapping edge, the soil wrapping edge is formed by filling soil 6, and the width of the soil wrapping edge is 1.5 m.

The utility model discloses a construction process, including following step:

before construction, the old roadbed and the side slope thereof are cleaned according to design requirements, the old roadbed at the lap joint of the new roadbed and the old roadbed is dug into a step shape, the step width is preferably 1.5-2 m, a drainage sand cushion layer 2 with the thickness of 10-20 cm is paved on the step, and waterproof geotextile 4 is paved on the drainage sand cushion layer 2.

Leveling the road according to the design requirement to widen the roadbed construction reference surface 1, and keeping the roadbed construction reference surface 1 dry and tidy. The paving precision of the roadbed construction reference surface 1 directly influences the paving precision of the EPS block 3, and has great influence on the overall performance of the roadbed.

A20 cm leveling sand cushion layer 2 is paved on the roadbed construction reference surface 1, and the leveling sand cushion layer 2 has a drainage function.

And after the leveling sand cushion layer 2 is qualified by inspection, a layer of waterproof geotextile 4 is laid on the leveling sand cushion layer.

After the waterproof geotextile 4 is laid, the EPS blocks 3 are laid, and the EPS blocks 3 are paved layer by layer from bottom to top in a staggered joint mode. Gaps and high-low dislocation among EPS blocks 3 are as small as possible, when gaps or high-low dislocation are generated among the blocks, the lowest layer is adjusted by a cushion layer, part of the gaps possibly exceed a standard tolerance (the maximum gap is required to be less than 10mm), and coarse sand is required to be adopted to be fully blocked. In order to prevent the dislocation between the EPS blocks 3, the EPS block connecting pieces 8 with certain strength are adopted to connect the layers of the EPS blocks 3. The EPS blocks 3 are laid without allowing tractors and other heavy machinery to travel directly on the blocks. Meanwhile, drainage and waterproof treatment in EPS construction should be done.

And after the top layer EPS construction is finished, spraying emulsified asphalt on the top surface of the top layer EPS. After the emulsified asphalt is sprayed, a layer of waterproof geotextile 4 is laid on the emulsified asphalt, the waterproof geotextile 4 completely covers the side surface of the EPS block 3, the waterproof geotextile and the upper surface of the top layer of the EPS block 3 are anchored together by using a steel bar anchor 7, and a triangular gap cannot be left between the waterproof geotextile 4 and the EPS block 3.

And (4) casting a reinforced concrete cover plate with the thickness of 15cm in a cast-in-place mode, wherein the reinforced concrete cover plate is required to extend into the old roadbed, and the extending length of the reinforced concrete cover plate is not required to be shorter than 3 m.

In order to protect the EPS embankments on the two sides and facilitate greening of embankment side slopes, soil-covered edges are filled at the EPS step-shaped positions and 1.5m outside the steps.

The EPS light filler is an ultra-light high polymer material which is developed quickly and applied more in recent years, the EPS has the characteristics of small density, good durability, good compression resistance and the like, when the EPS light material is used for widening a roadbed, the dead weight of the widened spliced roadbed can be reduced, the additional stress acting on the roadbed is further reduced, the obvious effect of reducing the compression deformation and the settlement of the roadbed is achieved, the EPS light filler is simple and rapid to construct, and the EPS light filler is a promising weak roadbed filler. The utility model discloses the concatenation construction is widened to soft road bed to the application EPS light filler, can effectively reduce the disease that arouses because of new and old road bed differential settlement.

The above is only a preferred embodiment of the present invention, and the scope of the right of the present invention should not be limited by this, so that the equivalent changes made in the claims of the present invention still belong to the protection scope of the present invention.

Claims

1. A light filler widens the mosaic structure on the weak road bed, wherein including old road bed and EPS block, EPS block is connected with outside of old road bed, the EPS block is laid sequentially with sand cushion and waterproof geotextile below, the top layer of EPS block has been laid the reinforced concrete cover plate of cast in situ, and the reinforced concrete cover plate of cast in situ stretches into the old road bed;

emulsified asphalt and waterproof geotextile are laid between the cast-in-place reinforced concrete cover plate and the EPS block body in sequence, the waterproof geotextile completely covers the side face of the EPS block body, and the waterproof geotextile above the EPS block body is connected with the upper surface of the top layer of the EPS block body through the steel bar anchor.

2. The widening and splicing structure of the light filler on the weak roadbed according to claim 1, wherein the edge of the connecting side of the old roadbed and the EPS blocks is in a step-shaped structure, and the EPS blocks are connected with the old roadbed through the step-shaped structure.

3. The widening and splicing structure of the light filler on the weak roadbed according to claim 2, wherein a sand cushion layer and a waterproof geotextile are sequentially laid on each step at the edge of the old roadbed.

4. The widening and splicing structure of the light filler on the weak roadbed according to claim 3, wherein the thickness of the sand cushion layer laid on the step is 10-20 cm.

5. The widening and splicing structure of the light filler on the weak roadbed according to claim 2, wherein the width of each layer of step at the edge of the old roadbed is 1.5-2 m.

6. The light filler widened and spliced structure on the weak roadbed according to claim 2, wherein the EPS blocks comprise EPS blocks which are paved from bottom to top in a staggered manner layer by layer.

7. The light filler widened splicing structure on the weak roadbed according to claim 6, wherein the EPS blocks of adjacent layers are connected through EPS block connecting pieces;

8. The widening and splicing structure of the light filler on the weak roadbed according to claim 1, wherein the cast-in-place reinforced concrete cover plate extends into the old roadbed by at least 3 m;

9. The widening and splicing structure of the light filler on the weak roadbed according to claim 1, wherein a soil covering edge is connected to the outer edge of the EPS block, the soil covering edge is formed by filling soil, and the width of the soil covering edge is 1.5 m.