CN112030878A - Construction method of rapid rush-through construction of subgrade water damaged along the river - Google Patents

Abstract

The invention relates to the technical field of highway subgrade engineering, in particular to a rapid rush-to-pass construction method along river subgrade water damage, which comprises the following steps: s1, prefabricating a reinforcement gabion on site; s2, stacking the reinforcement gabions at the toe to form a toe retaining wall; s3, building stones between the toe retaining wall and the highway layer by layer and compacting the stones layer by layer to form a stone-filled embankment; and S4, mounting a slope protection protective net for protecting the rockfill embankment on the slope surface of the rockfill embankment. The construction method has the advantages of convenient and fast integral construction, economy, applicability and low safety risk, takes the water-damaged roadbed section with the length of 50 meters as an example, and has the construction period of 5-7 days, thereby greatly shortening the construction period compared with the prior art. The roadbed along the river constructed by the construction method can form a whole, the capability of resisting erosion and erosion caused by flushing of flood is improved, the disaster resistance of the roadbed along the river is further enhanced, even if the roadbed meets over-standard flood, serious roadbed damage such as broken roads and the like can not occur, and the long-term smoothness of the road along the river is ensured.

Description

Construction method of rapid rush-through construction of subgrade water damaged along the river

technical field

The invention relates to the technical field of highway subgrade engineering, in particular to a construction method for fast rushing through the flooded subgrade along a river.

Background technique

Most of the mountain roads in my country are parallel to the river, one side is near the mountain and the other is facing the river. Many roadbeds along the river are half excavated, half filled or fully filled. Due to the long construction years of some roads and low road grades and design standards, under the influence of excessive flooding, infiltration, soaking, seepage, softening and other effects during the flood season, the subgrade structure is very likely to cause water damage and instability, thereby causing traffic interruption. In particular, the concave bank subgrade is the road section with concentrated development of water damage. Subgrade water damage often causes progressive damage to the overall structure of the subgrade, resulting in subgrade erosion, suspension of pavement, subsidence and other disasters. After the subgrade is destabilized, the transverse slope is steep, the water flow at the foot of the slope is turbulent, and the washout and overhang height exceeds 10 meters, which makes it extremely difficult to rush through after the subgrade is destroyed by water.

At present, there are two main ways to get through after the subgrade along the river is destroyed by water. The first method is to construct a retaining wall structure to protect the embankment; the retaining wall mainly relies on its own weight to meet its anti-slip and anti-overturning safety, and the retaining wall foundation along the river must ensure sufficient depth to prevent loss caused by erosion stable. Generally, the depth of the retaining wall foundation needs to be 1 to 3 meters. However, due to the rapid water flow at the foot of the subgrade and the slope in the flood season, the construction of the retaining wall foundation near the river needs to form a temporary cofferdam, and it is prone to water inrush and water leakage accidents, and the safety risks and construction difficulties are extremely high. . The concrete pouring of the tall retaining wall also needs to close the formwork. Due to the high and steep cross slope, the formwork is difficult to set up, and the construction period is also long. Taking the 50-meter-long water-damaged subgrade section as an example, the retaining wall is used for treatment construction. The cycle takes at least 20 days.

The second method is to construct the rubble rubble slope protection to protect the embankment; the rubble rubble acts as the upstream surface to resist the erosion and erosion of the water flow. During the construction of the rubble rubble slope protection, it is necessary to lay the rubble first, and then use cement mortar for jointing and masonry. The manual construction period is long. Taking the 50-meter-long water-damaged subgrade section as an example, the construction of the treatment is carried out with a retaining wall. The period is greater than 15 days. Due to the turbulent water flow at the foot of the slope protection, large stones need to be thrown and filled many times to form the foundation of the foot protection, and it is easy to be emptied under the action of long-term erosion and erosion, and the overall disaster resistance is weak.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a construction method for rapid rush-through of water-damaged subgrade along the river with short construction period.

The technical solution adopted by the present invention to solve the technical problem is: a construction method for rapid rush through the water damage of subgrade along the river, comprising the following steps: S1, prefabricating reinforced gabions on site; S2, stacking reinforced gabions at the toe of the slope to form the toe of the slope Retaining wall; S3. Fill stone material layer by layer between the retaining wall at the foot of the slope and the road and compact it in layers to form a stone-filled embankment; S4. Install a slope protection net to protect it on the slope of the stone-filled embankment.

Further, in step S2, two adjacent layers of reinforced gabions are stacked at staggered seams to form a horse tooth rub; adjacent reinforced gabions are connected by welding.

Further, in step S3, the particle size of the stone in the rock-filled embankment is greater than 40 mm and less than or equal to 500 mm; the thickness of each layer in the rock-filled embankment is greater than or equal to 1.5 times the particle size of the stone in the layer.

Further, in step S4, the installation method of the slope protection net includes the following steps:

S4.1. Drill several bolt holes on the slope of the rock-filled embankment; inject cement mortar into each bolt hole and insert the bolt; the upper end of the bolt is located outside the bolt hole;

S4.2. Several longitudinal support ropes are arranged laterally on the slope of the rock-filled embankment. The ring sleeve on the upper end of the rod is fixedly connected;

Several transverse support ropes are arranged longitudinally on the slope of the rock-filled embankment. Set of fixed connections;

S4.3. Hang a layer of grid net on the slope of the rock-filled embankment, and connect the grid net to the longitudinal support rope and the transverse support rope with iron wires;

A layer of steel rope net is laid on the top of the grille net, and the steel rope net is connected with the longitudinal support rope and the transverse support rope with a suture rope.

Further, in step S4.1, the diameter of the bolt hole is greater than or equal to 42 mm; the length of the bolt is L, and the depth of the bolt hole is H; wherein, H>L+200mm.

Further, in step S4.2, the diameters of the longitudinal support rope and the transverse support rope are both 16 mm.

Further, in step S4.3, the number of the grids is multiple, the adjacent grids overlap, and the overlapping width is greater than or equal to 50 mm, and the adjacent grids are connected by iron wires.

Further, the model of the grille mesh is S0/2.2/50; the model of the steel wire mesh is D0/08/300.

The beneficial effects of the present invention are as follows: the construction method of the water-damaged subgrade along the river in the embodiment of the present invention is convenient for overall construction, economical and applicable, and has low safety risk. -7 days, compared with the existing technology, the construction period is greatly shortened. The subgrade along the river constructed by the construction method of the embodiment of the present invention can form a whole, which improves its ability to resist flood erosion and erosion, thereby enhancing the disaster resistance capacity of the subgrade along the river. Even if it encounters excessive floods, it will not occur Serious damage to roadbeds such as broken roads ensures long-term smooth flow of highways along the river.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art; obviously, the accompanying drawings in the following description are only These are some embodiments described in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the structural representation of the subgrade along the river constructed by the construction method of the water-damaged and fast rush-through construction method of the subgrade along the river according to the embodiment of the present invention;

Figure 2 is a schematic structural diagram of a toe retaining wall formed by stacking reinforced gabions at the slope toe;

Figure 3 is a schematic structural diagram of a slope protection net installed on the slope of a rock-filled embankment.

The reference signs in the figure are: 1- reinforced gabion, 2- retaining wall at the foot of the slope, 3- highway, 4- rock embankment, 5- slope protection net, 6- anchor rod, 7- longitudinal support rope, 8- transverse Support rope, 9-grid mesh, 10-steel wire mesh, 11-suture rope.

Detailed ways

In order to make those skilled in the art better understand the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The construction method for quickly rushing through the flooded subgrade along the river according to the embodiment of the present invention includes the following steps: S1, prefabricating reinforced gabions 1 on site; S2, stacking the reinforced gabions 1 at the foot of the slope to form a retaining wall 2 at the foot of the slope; S3, Fill stone material layer by layer between the toe retaining wall 2 and the highway 3 and compact it in layers to form a stone filled embankment 4; S4, install a slope protection net 5 on the slope of the stone filled embankment 4 to protect it.

Step S1, prefabricating the reinforced gabion 1 on site.

The reinforced gabion 1 is a rectangular parallelepiped structure in which reinforced steel wraps a piece of boulder, which includes a reinforced cage welded by reinforced steel, and a piece of boulder filled in the reinforced cage. The reinforced gabion 1 can be centrally prefabricated in a spacious area on site.

The prefabrication method of the reinforced gabion 1 includes the following steps:

S1.1. Cut the steel bar according to the design size of the steel bar cage, bend and weld the steel bar after cutting to form a cage body with an open top and a cover for covering the top of the cage body. The reinforcement bars in the cage body and the cage cover both include keel reinforcement bars and grid reinforcement bars, wherein the diameter of the keel reinforcement bars is larger than the diameter of the grid reinforcement bars. When the cage body and the cage cover are manufactured, the intersection of each two steel bars should be welded firmly.

S1.2. Fill the cage body with boulders, and then weld the cage cover and the cage body together. The boulder is made of stones with a saturated uniaxial compressive strength greater than or equal to 30 MPa, and the shortest axis of the stones is greater than or equal to 150 mm. The arrangement of boulders in the steel cage is that the outer ring is filled with larger boulders, and the particle size of this part of boulders is larger than the diameter of the mesh holes of the steel cage, and the inner ring is filled with smaller boulders , and the boulders should be compacted.

Step S2, stacking the reinforced gabions 1 at the toe of the slope to form the retaining wall 2 at the toe of the slope.

In the embodiment of the present invention, the construction method of prefabricating the reinforced gabion 1 while stacking the reinforced gabion 1 at the toe of the slope to form the retaining wall 2 at the toe of the slope is adopted; that is, when the prefabrication of a reinforced gabion 1 is completed After that, the reinforced gabion 1 is placed at the foot of the slope by using a truck crane; in this way, the construction efficiency can be improved and the construction period can be saved.

Since the reinforced gabion 1 does not have high requirements on the bearing capacity of the foundation and has strong deformation adaptability, it is not necessary to excavate the foundation at the toe of the slope for embedding, and the reinforced gabion 1 can be placed directly at the toe of the slope. A number of reinforced gabions 1 are stacked at the toe of the slope to form a retaining wall 2 at the toe of the slope, which not only protects the lower end of the rock-filled embankment 4, but also stabilizes the toe of the slope, and can also prevent erosion and erosion. effect.

In order to improve the integrity and stability of the retaining wall 2 at the foot of the slope, in step S2, two adjacent layers of reinforced gabions 1 are stacked with staggered joints to form a horse tooth rub; adjacent reinforced gabions 1 are welded by welding. way to connect.

The direction parallel to the river channel is designated as the horizontal direction, and the direction perpendicular to the horizontal direction is designated as the vertical direction; refer to Figure 1 and Figure 2, between any upper and lower layers of reinforced stone cages 1 should be staggered in the horizontal and vertical directions. It is stacked to form a horse tooth rub, so as to avoid straight seams running up and down, and improve the integrity and stability of the retaining wall 2 at the foot of the slope. Further, any adjacent reinforced gabions 1 are connected by welding, so that the retaining wall 2 at the foot of the slope is connected as a whole, thereby improving the integrity and stability of the retaining wall 2 at the foot of the slope, and enhancing the slope. The anti-disaster ability of the foot retaining wall 2 will not destroy the foot retaining wall 2 even if it encounters a flood that exceeds the standard.

Step S3 , filling stone material layer by layer between the retaining wall 2 at the foot of the slope and the highway 3 and compacting the layers to form the stone-filled road embankment 4 .

The rock-filled embankment 4 is a bearing structure for forming a roadbed, which can be directly filled with hard rocks or medium-hard rocks in mountainous areas, and the construction is convenient. In step S3, the particle size of the stone in the rock-filled road embankment 4 is greater than 40 mm and less than or equal to 500 mm; the thickness of each layer in the rock-filled road embankment 4 is greater than or equal to 1.5 times the particle size of the stone in the layer.

In the embodiment of the present invention, the stone-filled road embankment 4 adopts a construction method of filling stone material layer by layer and layer-by-layer compaction. During construction, when laying and filling stones with a particle size of more than 250mm, large stones should be laid and filled first, with the large side facing down and the small side facing up. When paving and filling stones with a particle size of less than 250mm, it can be directly paved in layers and compacted by layers.

Step S4 , installing a slope protection net 5 to protect the slope of the rock-filled embankment 4 .

In the embodiment of the present invention, the rock-filled road lift 4 should be constructed in sections along the lateral direction. After the construction of a section of the rock-filled road embankment 4 is completed, the slope protection net 5 is installed on the slope of the rock-filled road embankment 4 to ensure that The slope protection net 5 is in close contact with the slope of the stone-filled embankment 4 . The slope protection net 5 is mainly composed of an anchor rod 6 , a longitudinal support rope 7 , a lateral support rope 8 , a grid net 9 and a steel rope net 10 . The provision of the slope protection net 5 not only protects the rock-filled embankment 4, improves the integrity and stability of the rock-filled embankment 4, but also enables the rock-filled embankment 4 to have good water permeability and anti-scour capability, and shortens the construction period , to avoid the problem of long period of artificial jointing and masonry.

Referring to FIG. 1 and FIG. 3, in step S4, the installation method of the slope protection net 5 includes the following steps:

S4.1. Drill several bolt holes on the slope of the rock-filled embankment 4; inject cement mortar into each bolt hole and insert the bolt 6; the upper end of the bolt 6 is located outside the bolt hole ;

S4.2. Several longitudinal support ropes 7 are arranged laterally on the slope of the rock-filled embankment 4. Each longitudinal support rope 7 passes through the loop on the upper end of the anchor rod 6 at the corresponding position, and the longitudinal support rope The two ends of the bolt are fixedly connected with the ring sleeve on the upper end of the anchor rod 6;

Several transverse support ropes 8 are arranged longitudinally on the slope of the rock-filled embankment 4, each transverse support rope 8 passes through the loop at the upper end of the anchor rod 6 at the corresponding position, and the two ends of the transverse support rope 8 are connected to The ring sleeve at the upper end of the anchor rod 6 is fixedly connected;

S4.3, lay a layer of grid net 9 on the slope of the rock-filled embankment 4, and connect the grid net 9 with the longitudinal support rope 7 and the lateral support rope 8 with iron wires;

A layer of steel wire mesh 10 is laid above the grid net 9 , and the wire mesh 10 is connected with the longitudinal support rope 7 and the transverse support rope 8 by sewing ropes 11 .

In step S4.1, according to the design position of the bolt 6, the bolt hole should be drilled on the slope of the rock-filled embankment 4, and the hole should be cleared with high pressure air. The diameter of the bolt hole is greater than or equal to 42 mm; the length of the bolt 6 is L, and the depth of the bolt hole is H; wherein, H>L+200mm. Inject cement mortar no less than M30 into each bolt hole and insert bolt 6, check and ensure that the grout in the bolt hole is full. When the slope surface of the rock-filled embankment 4 has a large undulation and height difference, the number of anchor rods 6 should be appropriately increased to ensure that the grid mesh 9 and the wire rope mesh 10 installed subsequently adhere to the slope surface.

In step S4.2, the longitudinal support rope 7 means that the length direction of the support rope extends longitudinally, and the lateral support rope 8 means that the length direction of the support rope extends laterally. Several longitudinal support ropes 7 are arranged in the lateral direction on the slope of the rock-filled embankment 4, and several transverse support ropes 8 are arranged in the longitudinal direction. The upper end of the rod 6 passes through the loop, and the two ends after tensioning are fixedly connected to the loop at the upper end of the anchor rod 6 through rope clips.

For example, the diameters of the longitudinal support ropes 7 and the transverse support ropes 8 are both 16 mm. When the length of the support rope is less than 15 meters, the end of each support rope is fixedly connected to the ring sleeve on the upper end of the anchor rod 6 through two rope clips; when the length of the support rope is greater than 15 meters and less than 30 meters, each support The end of the rope is fixedly connected with the loop on the upper end of the anchor rod 6 through three rope clips; when the length of the support rope is greater than 30 meters, the end of each support rope is connected with the loop on the upper end of the anchor rod 6 through four rope clips. Fixed connection.

In step S4.3, a layer of grid nets 9 are firstly laid on the slope of the rock-filled embankment 4 from top to bottom. The grid nets 9 may be located above the support ropes or below the support ropes. For example, the model of the grille mesh 9 is S0/2.2/50. Between the grid net 9 and the vertical and horizontal support ropes, iron wires with a diameter of 1.2 mm are used for tying at a distance of 1 meter. Further, the number of the grids 9 is multiple, the adjacent grids 9 overlap, and the overlapping width is greater than or equal to 50 mm, and the adjacent grids 9 are connected by iron wires. Specifically, an iron wire with a diameter of 1.2 mm is used to bind the adjacent grids 9 at a distance of 1 meter.

After the grid net 9 is laid and hung, a layer of steel rope net 10 is laid on the top of the grid net 9 from top to bottom. For example, the model of the wire mesh 10 is D0/08/300. A sewing cord 11 with a diameter of 8 mm is used for sewing and pretensioning between the steel cord net 10 and the vertical and horizontal support cords.

The construction method of the water-damaged subgrade along the river in the embodiment of the present invention is convenient for overall construction, economical and applicable, and has low safety risk. Taking a 50-meter-long subgrade section with water damage as an example, the construction period is 5-7 days, which is similar to the existing construction period. Compared with the technology, the construction period is greatly shortened. The subgrade along the river constructed by the construction method of the embodiment of the present invention can be formed as a whole, and the bearing structure of the subgrade can be quickly formed, and the erosion resistance of the subgrade along the river is improved, and the disaster resistance capacity of the subgrade along the river is further enhanced. In case of excessive floods, there will be no serious subgrade damage such as road breakage. It can be used as a permanent subgrade protection project to ensure long-term smooth flow of roads along the river, and solve the long construction period and high safety risks of traditional emergency construction methods. , The problem of low disaster resistance.

Example 1:

On a mountain road, the length of the subgrade section destroyed by water is 50 meters, and the washout and overhang height is 15 meters.

The above-mentioned water-damaged roadbed section is constructed by using the construction method of the present invention for rapid rush-through of water-damaged roadbed along the river, comprising the following steps:

S1. Prefabricated reinforced gabion 1 on site. The length × width × height of the reinforced gabion 1 is 2000 × 2000 × 1000 mm; the diameter of the keel reinforcement in the reinforcement cage is 16 mm, and the diameter of the mesh reinforcement is 8 mm; the mesh size on the reinforcement cage is 150 × 150 mm; the reinforcement cage The boulders inside are stones with saturated uniaxial compressive strength greater than 30MPa, and their shortest axis is greater than 150mm.

S2. Use a crane to place the reinforced gabion 1 at the foot of the slope to stack three layers to form the retaining wall 2 at the foot of the slope. Any two upper and lower layers of reinforced gabions 1 are stacked with staggered seams in the transverse and longitudinal directions to form a horse tooth rub, and any adjacent reinforced gabions 1 are connected by welding.

S3 , filling stone material layer by layer between the retaining wall 2 at the foot of the slope and the highway 3 and compacting the layers to form the stone filling embankment 4 . The particle size of the stone in the rock-filled road embankment 4 is greater than 40 mm and less than or equal to 500 mm; the thickness of each layer in the rock-filled road embankment 4 is greater than or equal to 1.5 times the particle size of the stone in the layer.

S4. Install a slope protection net 5 on the slope of the rock-filled embankment 4 to protect it.

S4.1. Drill a number of bolt holes on the slope of the rock-filled embankment 4 with a spacing of 4500mm in the horizontal and vertical directions, each bolt hole has a diameter of 42mm and a depth of 3200mm; inject injection into each bolt hole M30 cement mortar and insert 3 meter long anchor rod 6.

S4.2. On the slope of the rock-filled embankment 4, arrange a number of longitudinal support ropes 7 with a spacing of 4500mm in the transverse direction. The two ends of the tensioned support rope 7 are fixedly connected to the ring sleeve on the upper end of the anchor rod 6 by rope clips.

On the slope of the rock-filled embankment 4, a number of transverse support ropes 8 are arranged longitudinally at intervals of 4500 mm. Each transverse support rope 8 passes through the loop at the upper end of the anchor rod 6 at the corresponding position. The two ends after tightening are fixedly connected with the ring sleeve on the upper end of the anchor rod 6 by rope clips.

S4.3. Lay a layer of grid nets 9 of type S0/2.2/50 from top to bottom on the slope of the rock-filled embankment 4, and the adjacent grid nets 9 overlap and overlap with a width of 60mm, the stitching between adjacent grids 9 and the grids 9 and the vertical and horizontal support ropes are tied with iron wires with a diameter of 1.2mm at a distance of 1 meter.

Then, a layer of steel wire mesh 10 with a model of D0/08/300 is laid on top of the grille net 9 from top to bottom, and each steel wire mesh 10 is stitched with the vertical and horizontal support ropes by a stitching rope 11 with a diameter of 8 mm. And pre-tensioning, the two ends of the suture rope 11 are fixedly connected with the support rope or the loop on the upper end of the anchor rod 6 by two rope clips.

The above-mentioned 50-meter-long water-damaged subgrade section was constructed by using the construction method for rapid rush-through of water-damaged subgrade along the river according to the embodiment of the present invention, and the construction period was 5 days.

The construction of the 50-meter-long subgrade section damaged by water is carried out by using the existing construction method of the retaining wall structure, and the construction period is 25 days.

The 50-meter-long water-damaged subgrade section was constructed by using the existing construction method of screed rubble slope protection, and the construction period was 17 days.

It can be seen from the above that the construction method for rapid rush-through of subgrade water damage along the river according to the embodiment of the present invention has the advantages of convenient overall construction, low safety risk and short construction period. The subgrade along the river constructed by the construction method of the embodiment of the present invention can form a whole, which improves its ability to resist flood erosion and erosion, thereby enhancing the disaster resistance capacity of the subgrade along the river. Even if it encounters excessive floods, it will not occur Serious damage to roadbeds such as broken roads ensures long-term smooth flow of highways along the river.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. The construction method of rapid rush through the water damage of subgrade along the river, is characterized in that, comprises the following steps: S1, prefabricated reinforced gabions (1) on site; S2, stacking reinforced gabions (1) at the toe of the slope to form a toe block Wall (2); S3. Fill stone material layer by layer between the retaining wall at the foot of the slope (2) and the road (3) and compact it in layers to form a stone-filled embankment (4); S4. In the stone-filled embankment (4) A slope protection net (5) for protecting the slope surface is installed. 2. The construction method for fast rushing through the water damage of roadbed along the river according to claim 1, is characterized in that, in step S2, staggered stacking between adjacent two-layer reinforced stone cages (1) to form a horse tooth rubbing ; Adjacent reinforced gabions (1) are connected by welding. 3. The construction method according to claim 1, characterized in that, in step S3, the particle size of the stone in the rock-filled embankment (4) is greater than 40mm and less than or equal to 500mm; The thickness of each layer in the stone embankment (4) is greater than or equal to 1.5 times the particle size of the stone in the layer. 4. The construction method for fast rushing through the water damage of roadbed along the river according to claim 1, is characterized in that, in step S4, the installation method of slope protection net (5), comprises the following steps: S4.1. Drill several bolt holes on the slope of the rock-filled embankment (4); inject cement mortar into each bolt hole and insert the bolt (6); the upper end of the bolt (6) outside the bolt hole; S4.2. Several longitudinal support ropes (7) are arranged laterally on the slope of the rock-filled embankment (4). Pass through, and the two ends of the longitudinal support rope (7) are fixedly connected with the loop on the upper end of the anchor rod (6); Several transverse support ropes (8) are arranged longitudinally on the slope of the rock-filled embankment (4), and each transverse support rope (8) passes through the loop at the upper end of the anchor rod (6) at the corresponding position, and Both ends of the lateral support rope (8) are fixedly connected with the ring sleeve at the upper end of the anchor rod (6); S4.3. Lay a layer of grid net (9) on the slope of the rock-filled embankment (4), and connect the grid net (9) with the longitudinal support rope (7) and the lateral support rope (8) with iron wires ; A layer of steel rope net (10) is laid on the grid net (9), and the steel rope net (10) is connected with the longitudinal support rope (7) and the transverse support rope (8) by sewing ropes (11). 5. The construction method for rapid rushing through of water damaged roadbed along the river according to claim 4, characterized in that, in step S4.1, the diameter of the bolt hole is greater than or equal to 42mm; the diameter of the bolt (6) The length is L, and the depth of the bolt hole is H; wherein, H>L+200mm. 6. The construction method for rapid rush to clear water damage of subgrade along the river according to claim 4, characterized in that, in step S4.2, the diameters of the longitudinal support rope (7) and the lateral support rope (8) are both 16mm . 7. The construction method for rapid rush to clear water damage of roadbed along the river according to claim 4, is characterized in that, in step S4.3, the quantity of described grid net (9) is multiple, adjacent grid net (9) 9) The overlap between them, and the overlap width is greater than or equal to 50mm, and the adjacent grids (9) are connected by iron wires. 8. The construction method for rapid rush to clear water damage of roadbed along the river according to claim 4, wherein the model of the grille net (9) is S0/2.2/50; The model number is D0/08/300.

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