CN112048959A - A kind of transverse grouting roadbed reinforcement structure and roadbed repair method - Google Patents

Abstract

The invention discloses a transverse grouting roadbed reinforcement structure and a roadbed repair method. The transverse grouting roadbed reinforcement structure comprises a roadbed, a tree root pile group, a soft shoulder and a road surface, and the road surface is arranged on the roadbed, The soft road shoulder is arranged on both sides of the roadbed and the road surface, at least the soft road shoulder on one side of the roadbed is provided with the tree root stump group, and the tree root stump group includes a plurality of interconnected tree root stumps , the tree root stump extends from the side of the soft shoulder to the diseased part of the roadbed. In the present invention, a plurality of tree root piles extending to the diseased part of the roadbed are arranged to reinforce the roadbed, and the grouting reinforcement range of the root piles covers the diseased part of the roadbed. Deterioration, repair roadbed and pavement diseases.

Description

A kind of transverse grouting roadbed reinforcement structure and roadbed repair method

technical field

The invention relates to the technical field of roadbed repair, in particular to a lateral grouting roadbed reinforcement structure and a roadbed repair method.

Background technique

With the gradual improvement of my country's highway network, the engineering diseases that need to be treated in the process of highway operation and maintenance have also increased. In the process of road disease prevention and control, due to the flexibility of grouting reinforcement and repair technology, convenient and fast construction, and suitable for various complex geological conditions, it is often used in the prevention and control of roadbed, pavement, slope and tunnel diseases.

At present, the vertical drilling grouting technology has been successfully used in reinforcement, seepage and water-stop projects under various strata conditions, showing good advantages, and has many successful applications in highway roadbed pavement reinforcement and disease control projects. However, the vertical drilling damages the pavement structure and its integrity. After the grouting reinforcement is completed, it is necessary to interrupt the traffic for pavement repair and asphalt surface overlay to restore the pavement functionality. In addition, under the action of traffic load, the unevenness of materials at the grouting hole position of the reinforced pavement leads to obvious stress concentration, and the pavement structure is prone to new cracks and other early diseases, which affect the function and service life of the pavement. Therefore, how to reinforce the roadbed without destroying the pavement structure and interrupting traffic, preventing the deterioration of the roadbed structure, and repairing the disease of the roadbed and pavement are technical problems to be solved urgently in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a lateral grouting roadbed reinforcement structure and a roadbed repair method, which can be used to reinforce the roadbed without damaging the pavement structure or interrupting traffic, preventing uneven settlement of the roadbed and slippage of the roadbed slope, and repairing the roadbed and pavement. crack.

In order to achieve the above object, the present invention provides a transverse grouting roadbed reinforcement structure, comprising: a roadbed, a tree root pile group, a soft road shoulder and a road surface, the road surface is arranged on the road foundation, and the soft road shoulder is arranged on the On both sides of the roadbed and the road surface, at least the soft shoulder on one side of the roadbed is provided with the tree root stump group, and the tree root stump group includes a plurality of interconnected tree root stumps, and the tree root stumps extend from all the The side surface of the soft shoulder extends to the site where the roadbed is damaged.

Optionally, the tree root stump groups are multiple and arranged along the extension direction of the soft shoulder.

Optionally, the tree root stump group includes a plurality of tree root stumps and pile head concrete piers, the pile head concrete piers are arranged on the soft shoulder, and one end of the plurality of tree root stumps passes through the pile head concrete pier. The piers are connected, and a plurality of the tree root stumps extend from the pile head concrete pier in a divergent state to the diseased part of the roadbed.

Optionally, the included angle between the root stump and the horizontal plane is 0-60°.

Optionally, the included angle between the tree root stump and the cross section of the roadbed is 0-60°.

Optionally, a pile head hole is provided on the soft shoulder, and the pile head concrete pier is arranged in the pile head hole.

Optionally, a steel bar is arranged in the root stump, and one end of the steel bar close to the pile head hole is welded and connected.

The present invention also provides a lateral grouting roadbed repair method, comprising:

Drill pile holes from the soft shoulder on one or both sides of the roadbed to the diseased part of the roadbed, and the pile holes are multiple and extend from a point on the soft shoulder to the diseased part of the roadbed in a divergent state;

Make reinforcement according to the depth of the pile hole and place the reinforcement in the pile hole;

The root stump is formed by grouting through the pile hole;

Weld the end of the steel bar close to the soft shoulder;

Concrete is poured at the welded joints of steel bars to form pile head concrete piers.

Optionally, waterless drilling is used when drilling the pile holes to avoid the development of diseases caused by drilling water.

Optionally, the included angle between the pile hole and the horizontal plane is 0 to 60°, and the included angle between the pile hole and the cross section of the roadbed is 0 to 60°.

In a transverse grouting roadbed reinforcement structure and a roadbed repair method provided by the present invention, the transverse grouting roadbed reinforcement structure comprises: a roadbed, a tree root pile group, a soft shoulder and a road surface, and the road surface is arranged on the roadbed , the soft road shoulder is arranged on both sides of the roadbed and the road surface, at least the soft road shoulder on one side of the roadbed is provided with the tree root stump group, and the tree root stump group includes a plurality of interconnected tree roots The stump, the root stump extends from the side of the soft shoulder to the site where the roadbed is diseased. In the invention, a plurality of tree root piles extending to the diseased part of the roadbed are arranged to reinforce the roadbed, and the grouting reinforcement range of the root piles covers the diseased part of the roadbed. Deterioration, repair roadbed and pavement diseases.

Description of drawings

In order to describe the specific embodiments of the present invention more clearly, the accompanying drawings required for the specific embodiments will be briefly introduced below. In all the drawings, elements or sections are not necessarily drawn to actual scale.

1 is a schematic cross-sectional view of a transverse grouting roadbed reinforcement structure provided by an embodiment of the present invention;

FIG. 2 is a side view of a transverse grouting roadbed reinforcement structure provided by an embodiment of the present invention.

Among them: 10-subgrade, 101-pile head hole, 102-pile hole, 20-tree root pile group, 21-tree root pile, 22-pile head concrete pier, 23-rebar, 30-soft shoulder, 40-pavement.

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

1 is a schematic cross-sectional view of a transverse grouting roadbed reinforcement structure provided by an embodiment of the present invention, and FIG. 2 is a side view of a transverse grouting roadbed reinforcement structure provided by an embodiment of the present invention. Referring to FIGS. 1 and 2 , the The transverse grouting roadbed reinforcement structure includes: a roadbed 10, a tree root pile group 20, a soft road shoulder 30 and a road surface 40, the road surface is provided on the roadbed, and the soft road shoulder 30 is provided on the roadbed 10 and the road surface 40 On both sides, at least the soft shoulder 30 on one side of the roadbed 10 is provided with the tree root stump group 20, the tree root stump group 20 includes a plurality of interconnected tree root stumps 21, the tree root stumps 21 are The side surface of the soft shoulder 30 extends to the site where the roadbed 10 is damaged. In the present invention, a plurality of tree root piles 21 extending to the diseased part of the roadbed are arranged to reinforce the roadbed, and the grouting reinforcement range of the tree root piles 21 covers the diseased part of the roadbed 10, and the roadbed 10 is reinforced without destroying the structure of the road surface 40 and interrupting the traffic. , to prevent the deterioration of the structural state of the subgrade 10, and repair the diseases of the subgrade and pavement.

Referring to FIG. 1 and FIG. 2 , there are multiple tree root stump groups 20 and are arranged along the extension direction of the soft shoulder 30 , that is, multiple tree root stump groups 20 are arranged along the road. The interval between the root pile groups 20 is set to 3 meters. The tree root pile group 20 includes a plurality of tree root piles 21 and a pile head concrete pier 22, the pile head concrete pier 22 is arranged on the soft shoulder 30, and one end of the plurality of the tree root piles 21 passes through the The pile head concrete piers 22 are connected, and a plurality of the tree root piles 21 extend from the pile head concrete pier 22 in a divergent state to the site where the roadbed 10 is damaged. The included angle between the root stump 21 and the horizontal plane is 0 to 60°, and the included angle between the root stump 21 and the cross section of the roadbed 10 is 0 to 60°, that is, a point on the soft shoulder 30 can reach the roadbed. 10. The direction of the diseased part is a quadrangular pyramid, the vertex of the quadrangular pyramid is on the soft shoulder 30, and the root stump 21 is in the lower half of the quadrangular pyramid. Since the tree root stumps 21 are arranged in a divergent state, the roadbed can be better reinforced and the disease of the roadbed and pavement can be repaired.

Referring to FIG. 1 and FIG. 2 , the soft shoulder 30 is provided with a pile head hole 101 , and the pile head concrete pier 22 is arranged in the pile head hole 101 . The root pile 21 is provided with a steel bar 23, and one end of the steel bar 23 close to the pile head hole 101 is welded and connected. The steel bar 23 can further improve the structural strength of the tree root pile 21 and further strengthen the roadbed.

The invention also provides a lateral grouting roadbed repairing method to reinforce the roadbed without destroying the pavement structure and interrupting traffic, preventing uneven settlement of the subgrade, slippage of the subgrade slope, and repairing the crack of the subgrade and pavement. First, the pile holes 102 are drilled from the soft shoulder 30 on one or both sides of the roadbed 10 to the diseased part of the roadbed 10 . Specifically, whether to drill the soft shoulder 30 on one side or both sides of the subgrade 10 depends on the width of the road and the position of the diseased part in the subgrade 10, and the grouting reinforcement range of the root pile 21 can cover the diseased part. When drilling the pile hole 102, waterless drilling is adopted to avoid the development of the disease caused by the drilling water. The included angle between the pile hole 102 and the horizontal plane is 0-60°, and the included angle between the pile hole 102 and the cross-section of the roadbed 10 is 0-60°, that is, a point on the soft shoulder 30 can be made into a quadrangular pyramid in the direction of the diseased part of the roadbed 10, The vertex of the quadrangular pyramid is on the soft shoulder 30, and the tree root stump 21 is within the lower half of the quadrangular pyramid. In this embodiment, the inner diameter of the pile hole 102 is 100 mm.

After drilling the pile hole 102, make the steel bar 23 according to the depth of the pile hole 102 and place the steel bar 23 in the pile hole. The pile hole 102 is also a grouting hole. Chemical grouting is carried out through the pile hole 102, and the slurry is uniformly injected into the soil body of the roadbed 10. After the chemical grouting is completed, it is replaced with thick grout cement slurry to form pile grouting to form tree root stump 21 . After the tree root pile 21 is formed, one end of the steel bar 23 close to the soft shoulder 30 is welded and connected, and then concrete is poured at the welded connection part of the steel bar 23 to form the pile head concrete pier 22 . Further, a pile head hole 101 can be provided on the soft shoulder 30, and the pile head concrete pier 22 is poured into the pile head hole 101 to form a pile head concrete pier 22 of 500 mm×500 mm×500 mm. The grouting chemical grout and tree root piles 21 work together to inhibit and control the diseases of the subgrade 10, improve the stress properties of the subgrade, improve the bearing capacity, and inhibit and alleviate the occurrence of diseases such as uneven settlement of the subgrade, slippage of the subgrade slope, and cracking of the subgrade and pavement. developmental role.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that the foregoing embodiments can still be used for The recorded technical solutions are modified, or some or all of the technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention, and should be included in the The invention is within the scope of the claims and description.

Claims (10)

1. A transverse grouting roadbed reinforcement structure is characterized in that, comprising: roadbed, tree root pile group, soft road shoulder and road surface, the road surface is arranged on the road foundation, and the soft road shoulder is arranged on the road foundation and all the roads. On both sides of the road surface, at least the soft shoulder on one side of the roadbed is provided with the tree root stump group, the tree root stump group includes a plurality of interconnected tree root stumps, and the tree root stumps extend from the soft road shoulder. The side of the subgrade extends to the site of the diseased subgrade. 2 . The lateral grouting roadbed reinforcement structure according to claim 1 , wherein the group of tree root piles is plural and arranged along the extension direction of the soft shoulder. 3 . 3 . The lateral grouting roadbed reinforcement structure according to claim 1 , wherein the tree root pile group comprises a plurality of tree root piles and pile head concrete piers, and the pile head concrete piers are arranged on the soft shoulder. 4 . In the above, one end of a plurality of the root stumps is connected by the pile head concrete pier, and a plurality of the tree root stumps extend from the pile head concrete pier in a divergent state to the diseased part of the roadbed. 4 . The lateral grouting roadbed reinforcement structure according to claim 3 , wherein the included angle between the root pile and the horizontal plane is 0° to 60°. 5 . 5 . The transverse grouting roadbed reinforcement structure according to claim 4 , wherein the included angle between the tree root pile and the cross-section of the roadbed is 0° to 60°. 6 . 6 . The lateral grouting roadbed reinforcement structure according to claim 3 , wherein a pile head hole is provided on the soft shoulder, and the pile head concrete pier is arranged in the pile head hole. 7 . 7 . The transverse grouting roadbed reinforcement structure according to claim 6 , wherein the tree root pile is provided with steel bars, and one end of the steel bars close to the pile head hole is welded and connected. 8 . 8. A lateral grouting roadbed repair method, characterized in that, comprising: Drill pile holes from the soft shoulder on one or both sides of the roadbed to the diseased part of the roadbed, and the pile holes are multiple and extend from a point on the soft shoulder to the diseased part of the roadbed in a divergent state; Make reinforcement according to the depth of the pile hole and place the reinforcement in the pile hole; The root stump is formed by grouting through the pile hole; Weld the end of the steel bar close to the soft shoulder; Concrete is poured at the welded joints of steel bars to form pile head concrete piers. 9 . The lateral grouting roadbed repairing method according to claim 8 , wherein waterless drilling is adopted when drilling the pile holes to avoid the development of diseases aggravated by drilling water. 10 . 10 . The lateral grouting roadbed repair method according to claim 8 , wherein the angle between the pile hole and the horizontal plane is 0-60°, and the angle between the pile hole and the cross section of the roadbed is 0-60°. 11 .

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