CN215518197U

CN215518197U - Reinforced roadbed structure capable of preventing road from collapse due to outburst

Info

Publication number: CN215518197U
Application number: CN202121283380.6U
Authority: CN
Inventors: 简世民; 陈页开; 赵丽媛; 黄山; 何迪; 颜钰婷; 黎彤
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-01-14
Anticipated expiration: 2031-06-08

Abstract

The utility model discloses a reinforced roadbed structure capable of preventing sudden collapse of a road, which is paved in an underground cavity or a roadbed which is likely to collapse. And a geogrid and geotextile are laid between the roadbed cushion layer and the roadbed base layer. Be provided with cross supporting structure between road bed course and the soft soil layer, the structural fixing bolt and the set rivet of installing of cross supporting, cross supporting structure fixes on cement mixing pile cap, fixing bolt includes screw rod, nut and nut, set rivet includes the nail cap and nail pole. And the soft soil layer is reinforced by cement mixing piles. The method can effectively prevent and treat the problem of small-span cavity collapse, reduce the risk of sudden road collapse after the cavity appears in the roadbed, and effectively solve the problem of insufficient strength of the internal structure of the roadbed.

Description

Reinforced roadbed structure capable of preventing road from collapse due to outburst

Technical Field

The utility model relates to the technical field of road construction and roadbeds, in particular to the field of preventing and treating the collapse of roadbed cavities, and particularly relates to a reinforced roadbed structure capable of preventing the sudden collapse of a road.

Background

In recent years, road collapse accidents caused by underground hidden defects frequently occur, a series of casualties and huge economic losses are caused, and the social attention is attracted.

The roadbed is a foundation of a track or a road surface and is an earth structure formed by excavation or filling. The roadbed is often attacked and damaged by natural condition changes such as geology, water, rainfall, climate and earthquake, and is also attacked and damaged by artificial reasons such as subway excavation and pipeline leakage, so that the roadbed has enough stability and durability. However, if the roadbed compactness is insufficient, particularly in coastal soft soil areas, collapse can occur under the comprehensive action of load, water, temperature and the like, and great threat is generated to road driving safety and life and property safety of people. Therefore, it is necessary to design a collapse-proof roadbed structure.

Notice No. CN211947751U, the name is a roadbed structure's that prevents collapsing patent application discloses that this roadbed structure includes by lower supreme bed rock, concrete layer, water barrier, sand bed course and the surface course that sets gradually, concrete layer with be provided with the bottom plate between the bed rock, install the enhancement nail on the bottom plate, strengthen the nail including nail pole, go up the nut and the nut of driving a nail down, the nail pole lower extreme just passes for spine portion the bottom plate inserts and establishes in the bed rock, the upper end is passed down the nut and is fixed with last nut of driving a nail, and the nut of driving a nail is fixed on the nail pole and is used for with bottom plate upper surface contact down, has solved the problem that current roadbed inner structure intensity is low. The anti-collapse device adopts the method that the reinforced concrete is used as the rigid body combined bottom plate and the reinforcing nails to span the cavity, and the reinforced concrete has higher manufacturing cost and is more valuable for the anti-collapse treatment of the soil body above the proven cavity. Notice No. CN11227126A, the name is a soft soil district highway foundation reinforced structure and construction method, the patent application of supervision method discloses a soft soil district highway foundation reinforced structure, including the pitch layer that top-down set gradually, soft soil layer and hard soil layer, a plurality of enhancement mound have been buried along highway length direction in the soft soil layer, the length direction of strengthening the mound is the same with the width direction of highway, the cross-sectional area top-down of strengthening the mound increases gradually, it is provided with a plurality of reinforcing steel sheet to fix between the adjacent enhancement mound, the both ends of reinforcing steel sheet all bend down, the bottom of strengthening the mound is fixed and is provided with a plurality of reinforcement post, the bottom of reinforcement post is inserted and is located in the hard soil layer, the pouring has concrete layer between the bottom of adjacent enhancement mound, and it is filled with the sand bed to strengthen between the mound, the reinforcing steel sheet is located the sand bed. Although the method improves the supporting strength and stability of the roadbed and has the effect of reducing the phenomenon of collapse of the road surface, the construction complexity is high, the construction period is long, and the manufacturing process of the reinforcing pier and the reinforcing steel plate is complex. Therefore, it is very important to find a method for preventing and treating the cavities which are not detected or may develop after work and have both economical efficiency and high efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reinforced roadbed structure capable of preventing sudden collapse of a road, wherein the reinforced roadbed structure is laid in an underground cavity or a roadbed which is likely to collapse, and comprises a rock bearing layer, a soft soil layer, a roadbed cushion layer, a base layer, a surface layer and a control structure. And a geogrid and geotextile are laid between the roadbed cushion layer and the roadbed base layer. The cross-shaped support structure is arranged between the roadbed cushion layer and the soft soil layer, the roadbed structure is novel, the conception is ingenious, the stability of the roadbed can be improved, the problem that a large amount of funds are consumed by a traditional cavity treatment method is avoided, and the roadbed structure is economical and feasible.

The utility model is realized by at least one of the following technical schemes.

A reinforced roadbed structure capable of preventing sudden collapse of a road comprises a rock bearing layer, a soft soil layer, a roadbed cushion layer, a base layer and a surface layer, wherein a geogrid and geotextile are laid between the roadbed cushion layer and the surface layer, and a plurality of cross support structures are arranged between the roadbed cushion layer and the surface layer along the length direction of the roadbed; the cross-shaped support structure is connected in the pile cap of the cement mixing pile of the soft soil layer by penetrating the fixing piece.

Preferably, the cross-shaped support structure is provided with a through hole, the through hole penetrates through the hinge joint of the cross-shaped support structure, and the hinge joint of the cross-shaped support structure is located at the central point of the cross-shaped support structure.

Preferably, the two plates of the spider structure are secured together at the perforations by hinge bolts.

Preferably, the cross-shaped support structure is connected in the pile cap of the soft soil layer cement mixing pile by penetrating a plurality of fixing rivets, and the cross-shaped support structure is connected with the soft soil layer cement mixing pile by penetrating a plurality of fixing rivets into the pile caps of the cross-shaped support structure and the soft soil layer cement mixing pile.

Preferably, the cross support structure is arranged above the underground cavity collapse area, and the hinge point of the cross support structure is arranged at the center of the roadbed in the width direction.

Preferably, the plurality of cross-shaped support structures are arranged at equal intervals along the length direction of the roadbed.

Preferably, the end part of the cross support structure is connected with a side slope drainage ditch.

Preferably, the end part of the cross-shaped support is T-shaped and is of a solid structure, the end part of the T-shaped support extends into the drainage ditch, and the inner side of the end part of the T-shaped support is tightly attached to the inner wall of the drainage ditch.

Preferably, a threaded hole is drilled in the center of the end part of the cross support, and the end part of the cross support is connected with the cross support structure through threads.

Preferably, the end of the cross-shaped bracket comprises two rectangular plates to form an X-shaped structure.

Compared with the prior art, the utility model has the following effects:

fix the cross supporting structure on cement mixing stake, carry out laying of road bed and road surface structure again, thereby the bending resistance and the stability of whole road bed have been improved, effectively improve road bed bulk strength and bearing capacity, can effectively prevent that the road from collapsing suddenly, and the supporting effect of pile foundation in the reinforcement effect and the weak soil layer through cross supporting in the road bed, and geogrid and geotechnological cloth add the muscle effect, can effectively prevent and treat the problem that the small-span cavity collapses, reduce the risk that the road collapses suddenly after appearing the cavity in the road bed, effectively solve the not enough problem of road bed inner structure intensity.

Drawings

Fig. 1 is a schematic sectional view of the structure of the present invention, which is mainly used for embodying the internal structure of a roadbed;

FIG. 2 is a top and front view of a cross brace configuration in the configuration of the present invention;

FIG. 3 is an elevation view of a fixing bolt in the construction of the present invention;

FIG. 4 is a top view of a fixing bolt in the construction of the present invention;

FIG. 5 is an elevation view of a set rivet in the construction of the present invention;

FIG. 6 is a top plan view of a set rivet in the structure of the present invention;

in the figure: 1. bedrock; 2. a soft soil layer; 3. a roadbed cushion layer; 4. a roadbed base layer; 5. a surface layer; 6. a cross-shaped support structure; 7. stirring the piles with cement; 8. a cement mixing pile cap; 9. fixing the bolt; 10. fixing the rivet; 11. the end part of the cross bracket; 12. and a soft soil layer cavity.

Detailed Description

The technical solution of the embodiment of the present invention will be fully described in detail with reference to the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1, the reinforced roadbed structure capable of preventing the sudden collapse of a road comprises a rock supporting layer 1, a soft soil layer 2, a roadbed cushion layer 3, a roadbed base layer 4 and a surface layer 5;

a geogrid and geotextile are laid between the roadbed cushion layer 3 and the roadbed base layer 2; a plurality of cross-shaped support structures 6 are arranged between the roadbed cushion layer 3 and the soft soil layer 2;

the cross-shaped support structure 6 is arranged above an underground cavity collapse area and is used for preventing and treating subgrade collapse; the pin joint setting of cross supporting structure 6 is in road bed width direction center department, the support is provided with a plurality ofly along road bed length direction, and a plurality of supports are arranged along road bed length direction equidistant. The cross brace plate end 11 of the cross brace structure 6 is connected with the curb drain. By adopting the structure, the cross-shaped support structure is arranged on the roadbed at intervals, so that the overall strength of the roadbed is improved.

The hinged position of the cross support plate of the cross support structure 6 is provided with a through hole, and the fixing bolt 9 and the two support plates are fixed through nuts. And the direction of the perforated shaft is the same as that of the bolt shaft, and the bolt is inserted into a bolt hole reserved at the junction of the cross-shaped bracket and is connected with a corresponding nut so as to fix the bracket. The bolt holes penetrate through the upper side and the lower side of the support.

As shown in FIG. 2, the cross-shaped bracket structure 6 is X-shaped, and two bracket plates 6-1 are fixed at the center of the road through fixing bolts 9.

A plurality of fixing rivets 10 are arranged on the cross-shaped bracket structure 6; a plurality of cement mixing piles 7 are arranged below the cross-shaped support structure 6; the cross-shaped support structure 6 penetrates into the pile caps of the cement mixing piles 7 of the soft soil layer through the fixing rivets 10 to be connected, so that the load strength of the soft soil layer between the cement mixing piles is reduced, and the risk that the roadbed above the soft soil layer collapses suddenly after the soft soil layer has a hole 12 is effectively reduced.

The fixing bolt 9 comprises a screw rod 9-1, a nut 9-2 and a nut 9-3;

as shown in fig. 3 and 4, the screw 9-1 of the fixing bolt 9 passes through a through hole reserved at the center of the cross-shaped support structure 6 and is fixed at the center of the roadbed in the width direction at the center line of the road through a nut 9-3. The cross support structure 6 is arranged at the joint of the center line of the roadbed and the cross support structure.

As shown in fig. 5 and 6, the fixing rivet 10 comprises a nail cap 10-1 and a nail rod 10-2, the lower end of the top rod 10-2 is a sharp-pointed part, and the sharp-pointed part penetrates through the support plate 6-1 and is directly inserted on the pile cap 8 of the cement mixing pile 7 to fix the cross-shaped support structure 6 and reinforce the roadbed by using the supporting effect of the pile.

Cross support tip 11 of cross support structure 6 is connected with the side slope escape canal, and cross support tip 11 is the T style of calligraphy, and is solid construction, and its T style of calligraphy tip stretches into the escape canal, and the escape canal inner wall is hugged closely to T style of calligraphy tip inboard.

A threaded hole is drilled in the center of the end part 11 of the cross support, and the end part 11 of the cross support is connected with the cross support structure 6 through threads.

In a preferred embodiment, the cross frame end 11 is T-shaped and has a solid structure, and the cross frame end and the cross frame structure are fixed by inserting fixing rivets into the cross frame end and the cross frame structure.

Preferably, cross support tip 11 includes two blocks of rectangular plates, forms X type structure, pierces two blocks of rectangular plates and cross support structure through fixing rivet, fixes cross support tip and cross support structure mutually, and cross support X font tip stretches into the escape canal, and the inboard escape canal inner wall of hugging closely of X type.

Screw holes can be processed in the end part 11 of the cross support along the height direction, through holes are processed in the cross support along the thickness direction, the end part of the cross support is arranged right above the cross support, the end part of the support and the cross support structure are connected through a stud, the screwing end of the stud is screwed into the end part of the cross support, the other section of the stud penetrates through the through holes of the cross support structure, a gasket is sleeved on the through holes, and then a nut is screwed.

As a preferred embodiment, in non-soft soil areas without cement mixing pile reinforcement, the cross-shaped support structure can also be directly inserted on the bedrock through fixing rivets.

The implementation method of the reinforced roadbed structure capable of preventing the sudden collapse of the road comprises the following steps:

s1, paving a soft soil layer, paving a cross-shaped support plate on the soft soil layer, and paving the cross-shaped support plate on a path with the cement mixing piles as much as possible;

s2, driving the fixing rivet into the support plate and the pile cap to fix one of the cross support plates;

and S3, fixing the other plate by the hinge bolt, and similarly, driving the fixing rivet into the other support plate and the pile cap.

And S4, connecting the cross bracket with the end part of the cross bracket in a threaded connection mode, and connecting the T-shaped end part of the cross bracket with the drainage ditch.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a but prevent sudden collapse of road adds muscle roadbed structure, includes rock bearing layer (1), soft soil layer (2), roadbed cushion layer (3), basic unit (4) and surface course (5), characterized by: geogrids and geotextiles are laid between the roadbed cushion layer (3) and the surface layer (5), and a plurality of cross-shaped support structures (6) are arranged between the roadbed cushion layer (3) and the surface layer (5) along the length direction of the roadbed; the cross-shaped support structure (6) is penetrated into the pile cap of the soft soil layer cement mixing pile (7) through a fixing piece to be connected.

2. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 1, wherein: the cross-shaped support structure (6) is provided with a through hole, the through hole penetrates through the hinged position of the cross-shaped support structure (6), and the hinged position of the cross-shaped support structure (6) is located at the central point of the cross-shaped support structure.

3. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 2, wherein: the two plates of the cross-shaped bracket structure (6) are fixed together at the perforated part through a hinged bolt (9).

4. A reinforced roadbed structure capable of preventing the sudden collapse of a road according to claim 3, wherein: the cross-shaped support structure (6) is connected in the pile caps of the soft soil layer cement mixing piles (7) by penetrating a plurality of fixing rivets (10), and the cross-shaped support structure (6) and the soft soil layer cement mixing piles (7) are connected together by penetrating a plurality of fixing rivets (10) into the pile caps of the cross-shaped support structure (6) and the soft soil layer cement mixing piles (7).

5. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 4, wherein: the cross support structure (6) is arranged above the underground cavity collapse area, and the hinge point of the cross support structure (6) is arranged at the center of the roadbed in the width direction.

6. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 5, wherein: the plurality of cross support structures (6) are arranged at equal intervals along the length direction of the roadbed.

7. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 6, wherein: the cross support end part (11) of the cross support structure (6) is connected with a side slope drainage ditch.

8. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 7, wherein: the end part (11) of the cross-shaped bracket is T-shaped and is of a solid structure, the end part of the T-shaped bracket extends into the drainage ditch, and the inner side of the end part of the T-shaped bracket is tightly attached to the inner wall of the drainage ditch.

9. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 8, wherein: a threaded hole is drilled in the center of the end part (11) of the cross support, and the end part (11) of the cross support is connected with the cross support structure (6) through threads.

10. The reinforced roadbed structure capable of preventing the sudden collapse of the road according to claim 9, wherein: the cross support end part (11) comprises two rectangular plates to form an X-shaped structure.