CN117265935A - Stone throwing and silting construction method for wading roadbed and side slope protection structure - Google Patents
Stone throwing and silting construction method for wading roadbed and side slope protection structure Download PDFInfo
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- CN117265935A CN117265935A CN202311249801.7A CN202311249801A CN117265935A CN 117265935 A CN117265935 A CN 117265935A CN 202311249801 A CN202311249801 A CN 202311249801A CN 117265935 A CN117265935 A CN 117265935A
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- wading
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- 239000004575 stone Substances 0.000 title claims abstract description 80
- 238000010276 construction Methods 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011241 protective layer Substances 0.000 claims abstract description 22
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 18
- 239000010802 sludge Substances 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 210000002310 elbow joint Anatomy 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 8
- 230000003628 erosive effect Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 abstract 2
- 239000011800 void material Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Architecture (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of wading roadbed construction, and discloses a stone throwing and silting construction method for the wading roadbed and a side slope protection structure. The mould bags are arranged on the side slopes of the two sides of the roadbed backfilled by the block stone and matched with the slope feet at the bottom of the side slope, the mould bags are filled with concrete to form the protective layer structure covered on the side face of the side slope, and the slope feet at the bottom of the side slope play a supporting and limiting role on the protective layer structure, so that the protective layer is prevented from falling off. And then, after the concrete in the protective layer structure is solidified, grouting into the gaps of the block stones through grouting pipes, filling concrete mortar between the gaps of the block stones, and solidifying the block stones into a whole. Based on the construction method and the protective structure, the integrity of the roadbed is improved through grouting, in addition, the mould bag protective layer is arranged on the side face of the roadbed, the mould bag protective layer is utilized to weaken the flushing of water flow and limit the falling of roadbed materials, so that the roadbed is not easy to fall off due to the flushing and the erosion of the water flow, and the construction quality is ensured.
Description
Technical Field
The invention relates to the technical field of wading roadbed construction, in particular to a stone throwing and silting construction method for the wading roadbed and a side slope protection structure.
Background
In recent years, the construction of infrastructure is greatly advanced in China, and wading geological roads such as water passing roads, water facing roads and the like can pass through a water-containing silt stratum. The construction of the silt roadbed at the deep water is difficult, the technical difficulty is high, and the quality problems of sinking, void and the like of the roadbed are easily caused, so that the quality of the pavement is influenced. In the traditional construction of the roadbed in the silt section, a separate method of stone throwing and silt squeezing is often adopted. The construction of the stone-throwing and siltation method is rapid, the process is simple, large construction machinery is not needed, gaps are inevitably formed between stone-filled roadbeds, and the phenomena that siltation soil in a block gap is easy to wash out when the water flow speed is large at the water edge and the underground water quantity is rich, roadbeds are easy to void after a long time are overcome.
Disclosure of Invention
Aiming at the defects in the prior art, the stone throwing and silting construction method for the wading roadbed and the slope protection structure are provided, so that the erosion of water to the roadbed is avoided, the reliability of the roadbed is improved, and the construction quality is ensured.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the stone throwing and silting construction method for the wading roadbed is characterized by comprising the following steps of: the method comprises the following steps:
s1: backfilling a block stone in a road construction wading area until the elevation of the block stone is higher than that of the area above the water surface;
s2: cleaning sludge on two sides of a roadbed, and arranging a toe at the bottom of a slope of the roadbed;
s3: repeating the steps S1-S2 until the construction of the wading roadbed is completed, and flattening the roadbed surface and the side slope;
s4: firstly paving a grouting pipeline on a side slope, and then paving a mould bag, wherein the bottom shape of the mould bag is matched with a slope foot;
s5: filling concrete into the mould bags to form a roadbed slope protection layer;
s6: after the concrete in the mould bags is solidified, grouting is carried out in the block stone gaps by a grouting pipe.
According to the technical scheme, in the step S1, firstly, filling a large-particle-size block stone into a road construction wading area until the top surface of the large-particle-size block stone layer is higher than a silt layer; and filling the stone blocks with different particle sizes to the upper part of the stone block layer with large particle sizes until the elevation of the stone block layer with different particle sizes is higher than the area above the water surface.
According to the technical scheme, the step S2 is divided into the following steps of
S1: when the roadbed is backfilled to the water surface, immediately cleaning and transporting away the silt extruded to the two sides by the roadbed by using a long-arm excavator;
s12: using a slurry pump to clean a small amount of sludge left on two sides of the roadbed;
s13: digging grooves on the bottoms of side slopes on two sides of the roadbed by using a long-arm digger or a digger ship; and bedding with large-grain-size stone blocks in the grooves, then paving broken stones, and checking paving effect under water by divers.
According to the technical scheme, in the step S3, after the roadbed is higher than the water surface, the collected and matched broken stone is filled into gaps among the stones by an excavator, and the gap is leveled, rolled and compacted; and then, uniformly paving small-sized stones on the side slope to ensure the preliminary leveling of the side slope.
According to the technical scheme, in the step S4, the grouting pipe is divided into a plurality of grouting units, and each grouting unit is distributed at intervals; the single grouting unit is installed along the direction of the roadbed slope and is fixed on the stone by a U-shaped clamping ring, so that the grouting pipe is tightly connected with the stone, and the opening of the grouting pipe is checked to be unobstructed and not blocked before installation;
the slope toe adopts a V-shaped slope toe; the method comprises the steps of pre-distributing the mould bags on site bank slopes according to construction sequence and azimuth after entering the mould bags, and paving geotechnical mould bag units along the construction direction of the bank lines; the mould bags are of an integral structure, and the V-shaped mould bag structure paved at the bottom of the side slope is manufactured and molded during production, so that the mould bags are more stable after concrete construction; forming holes on the grouting pipe part of the top mould bag, and installing a sleeve bag; in order to facilitate the pouring of mortar in the mould bag, a sleeve bag is sewed at a mortar pouring port on the mould bag, and external mortar pouring equipment passes through the sleeve bag and enters the mould bag.
According to the technical scheme, in the step S5, all the mould bags are required to be ensured to be in a wet state before filling concrete into the mould bags; when filling is started, pumping cement mortar once to lubricate the pipeline, and immediately filling after the first pumping; the filling sequence should be continuously carried out from bottom to top, the filling interval time is not more than 30 minutes, the filling speed is 10-15 m 3/h, and the filling pressure is 0.2-0.3 Mpa.
According to the technical scheme, in the step S6, cement-water glass double-liquid grouting is adopted, the double-liquid grouting is mainly controlled by grouting amount, the grouting amount is 100-200 kg/m-3, the grouting pressure is 0.3-0.6 MPa, and the interval between each grouting outlet is 400-600 mm; the slurry can be injected under pressure only after being fully and uniformly stirred by a stirrer, and is continuously and slowly stirred in the grouting process, the stirring time is not less than the initial setting time, and the slurry is filtered by a screen before being pumped.
A side slope protective structure for wading road bed, its characterized in that: the mould bag protection layers are connected with each other along the length direction of the roadbed and are arranged on side slopes of the roadbed, the top of each mould bag protection layer is placed on the top surface of the roadbed, the bottom of each mould bag protection layer is placed in the corresponding slope toe, and the middle of each mould bag protection layer is covered on the corresponding slope; the grouting layer is positioned between the block stone gap of the roadbed and the gap between the mould bag protection layer and the roadbed; according to the arrangement position of the grouting pipe, a through hole for penetrating through the grouting pipe is arranged at the top of the mould bag protective layer.
According to the technical scheme, the grouting pipe is divided into a plurality of grouting pipe units, and each grouting pipe unit comprises a plurality of grouting straight pipes distributed along a side slope, an elbow joint connected between two adjacent grouting straight pipes and a plug arranged on one grouting straight pipe; the grouting straight pipe is connected into a tubular structure through an elbow joint, and a plug is arranged at the end head of the tubular structure; a plurality of grouting holes are arranged on the vertical pipeline at intervals, and the interval range is 400 mm-600 mm.
According to the technical scheme, the slope toe adopts a V-shaped structure, the mould bag protective layer is divided into a V-shaped supporting layer at the lower part and a plane layer at the upper part, the V-shaped supporting layer is arranged in the slope toe, and the plane layer covers the surface of the slope.
The invention has the following beneficial effects:
1. the mould bags are arranged on the side slopes of the two sides of the roadbed backfilled by the block stone and matched with the slope feet at the bottom of the side slope, the mould bags are filled with concrete to form the protective layer structure covered on the side face of the side slope, and the slope feet at the bottom of the side slope play a supporting and limiting role on the protective layer structure, so that the protective layer is prevented from falling off. And then, after the concrete in the protective layer structure is solidified, grouting into the gaps of the block stones through grouting pipes, filling concrete mortar between the gaps of the block stones, and solidifying the block stones into a whole.
Based on the construction method and the protection structure, the roadbed slope adopts a combined support form of mould bag concrete and grouting, compared with the existing single stone slope protection, the integrity of the roadbed is increased through grouting, in addition, the mould bag protection layer is arranged on the side surface of the roadbed, and the mould bag protection layer is used for weakening water flow scouring and limiting the falling of roadbed materials, so that the roadbed is not easy to void due to water flow scouring and erosion, and the construction quality is ensured.
2. The V-shaped toe is arranged at the bottom of the side slope, the V-shaped toe is utilized to limit the die bag, and the bottom of the die bag is prevented from falling off from the side slope due to water flow erosion.
Drawings
FIG. 1 is a cross-sectional view of a provided embodiment of the present invention;
FIG. 2 is a side view of an embodiment provided by the present invention;
FIG. 3 is a schematic view of the construction of a grouting straight pipe according to an embodiment of the present invention;
FIG. 4 is a schematic view of a grouting pipe according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of a sleeve bag attached to a molded bag in accordance with an embodiment of the present invention;
FIG. 6 is a top view of a planar layer of a molded bag in accordance with an embodiment of the present invention;
in the figure, 1, water surface; 2. roadbed; 2-1, side slopes; 3. a toe; 4. grouting pipelines; 4-1, grouting straight pipes; 4-2, an elbow joint; 4-3, plugs; 4-4, grouting holes; 4-5, a U-shaped clamping ring; 5. molding and bagging; 5-1, a V-shaped supporting layer; 5-2, a plane layer; 6. and (5) bagging.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
Referring to fig. 1 to 6, the invention provides a stone throwing and dredging construction method for a wading roadbed.
Example 1
The method comprises the following steps:
s1: backfilling a block stone in a road construction wading area until the elevation of the block stone is higher than the area above the water surface 1;
s2: cleaning sludge on two sides of a roadbed 2, and arranging a toe 3 at the bottom of a side slope 2-1 of the roadbed;
s3: repeating the steps S1-S2 until the construction of the wading roadbed is completed, and flattening the roadbed surface and the side slope;
s4: firstly paving a grouting pipeline 4 on a side slope, and then paving a mould bag 5, wherein the bottom shape of the mould bag is matched with a slope foot;
s5: filling concrete into the mould bags to form a roadbed slope protection layer;
s6: after the concrete in the mould bags is solidified, grouting is carried out in the block stone gaps by a grouting pipe.
In the embodiment, the mould bags are arranged on the side slopes of the two sides of the roadbed backfilled by the block stone and matched with the slope feet at the bottom of the side slope, the mould bags are filled with concrete to form the protective layer structure covered on the side face of the side slope, and the slope feet at the bottom of the side slope play a supporting and limiting role on the protective layer structure, so that the protective layer is prevented from falling off. And then, after the concrete in the protective layer structure is solidified, grouting into the gaps of the block stones through grouting pipes, filling concrete mortar between the gaps of the block stones, and solidifying the block stones into a whole.
Based on the construction method, in the construction process of the wading roadbed, the construction is carried out by utilizing grouting among the slope toe, the mould bag protection layer and the block stones and by throwing the stones, so that the firmness and reliability of the roadbed are ensured, the erosion of later water flow to the wading area of the roadbed is avoided, and the construction quality is ensured.
Example 2
The steps and principles of example 2 are similar to those of example 1, except that: on the basis of the embodiment 1, a preferable construction form of the step S1 is given to realize the construction of the roadbed, but the protection scope of the present invention is not limited to the construction form of the roadbed of the embodiment.
In the embodiment, in step S1, a large-particle-size stone block is filled into a wading area for road construction until the top surface of the large-particle-size stone block layer is higher than a silt layer; and filling the stone blocks with different particle sizes to the upper part of the stone block layer with large particle sizes until the elevation of the stone block layer with different particle sizes is higher than the area above the water surface. In the process, the unloaded stone blocks are thrown into water by using an excavator in a loading vehicle matching mode, and the direction of the stone blocks is from the center line of the roadbed to two sides, so that the sludge is convenient to scatter to two sides.
Step S2 is divided into the following steps
S1: when the roadbed is backfilled to the water surface, immediately cleaning and transporting away the silt extruded to the two sides by the roadbed by using a long-arm excavator;
s12: in order to prevent sludge omission, a slurry pump is used for cleaning a small amount of sludge left on two sides of a roadbed;
s13: digging grooves on the bottoms of side slopes on two sides of the roadbed by using a long-arm digger or a digger ship; and bedding with large-grain-size stone blocks in the grooves, then paving broken stones, and checking paving effect under water by divers.
Example 3
The steps and principles of example 3 are similar to those of example 1, except that: on the basis of the embodiment 1, a preferable construction mode of the step S2 is provided, so that the sludge is cleaned and the construction of the toe is realized, but the protection scope of the invention is not limited to the sludge cleaning and the construction of the toe in the embodiment.
In this embodiment, the step S2 is specifically divided into the following steps
S1: when the roadbed is backfilled to the water surface, immediately cleaning and transporting away the silt extruded to the two sides by the roadbed by using a long-arm excavator;
s12: in order to prevent sludge omission, a slurry pump is used for cleaning a small amount of sludge left on two sides of a roadbed;
s13: digging grooves on the bottoms of side slopes on two sides of the roadbed by using a long-arm digger or a digger ship; and bedding with large-grain-size stone blocks in the grooves, then paving broken stones, and checking paving effect under water by divers.
Based on the above embodiments 1-3, in step S3, after the roadbed is above the water surface, filling the aggregate crushed stone into the gaps between the stone blocks by using an excavator, and leveling, rolling and compacting; and then, uniformly paving small-sized stones on the side slope to ensure the preliminary leveling of the side slope. In the process, the heavy stone-carrying automobile continuously transports stones forwards through the flattened roadbed, and compacts the roadbed more tightly.
Based on the above embodiments 1-3, in step S4, the grouting pipe is divided into a plurality of grouting units, each grouting unit being arranged at intervals; the single grouting unit is installed along the direction of the roadbed slope and is fixed on the stone by a U-shaped clamping ring, so that the grouting pipe is tightly connected with the stone, and the opening of the grouting pipe is checked to be unobstructed and not blocked before installation;
the slope toe adopts a V-shaped slope toe; the method comprises the steps of pre-distributing the mould bags on site bank slopes according to construction sequence and azimuth after entering the mould bags, and paving geotechnical mould bag units along the construction direction of the bank lines; the mould bags are of an integral structure, and the V-shaped mould bag structure paved at the bottom of the side slope is manufactured and molded during production, so that the mould bags are more stable after concrete construction; as shown in fig. 5-6, holes are formed in the grouting pipe part of the top mould bag, and a sleeve bag 6 is arranged; in order to facilitate the pouring of mortar in the mould bag, a sleeve bag is sewed at a mortar pouring port on the mould bag, and external mortar pouring equipment passes through the sleeve bag and enters the mould bag.
Example 4
The steps and principles of example 4 are similar to those of example 1, except that: on the basis of the embodiment 1, a preferable construction form of the step S5 is provided to realize the pouring of the concrete into the mold bags, but the protection scope of the present invention is not limited to the pouring mode of the concrete into the mold bags of the embodiment.
In step S5, all the mold bags are required to be kept in a wet state before filling concrete into the mold bags; when filling is started, pumping cement mortar once to lubricate the pipeline, and immediately filling after the first pumping; the filling sequence should be continuously carried out from bottom to top, the filling interval time is not more than 30 minutes, the filling speed is 10-15 m 3/h, and the filling pressure is 0.2-0.3 Mpa.
Example 5
The steps and principles of example 5 are similar to those of example 1, except that: on the basis of the embodiment 1, a preferable construction form of the step S6 is provided to realize the grouting in the block gap, but the protection scope of the invention is not limited to the grouting method in the block gap of the embodiment.
In the embodiment, in the step S6, cement-water glass double-liquid grouting is adopted, the double-liquid grouting is mainly controlled by grouting amount, the grouting amount is 100-200 kg/m-3, the grouting pressure is 0.3-0.6 MPa, and the interval between each grouting outlet is 400-600 mm; the slurry can be injected under pressure only after being fully and uniformly stirred by a stirrer, and is continuously and slowly stirred in the grouting process, the stirring time is not less than the initial setting time, and the slurry is filtered by a screen before being pumped.
The invention also provides a slope protection structure for the wading roadbed.
Example 1
The mould bag protection layers are connected with each other along the length direction of the roadbed and are arranged on side slopes of the roadbed, the top of each mould bag protection layer is placed on the top surface of the roadbed, the bottom of each mould bag protection layer is placed in the corresponding slope toe, and the middle of each mould bag protection layer is covered on the corresponding slope; the grouting layer is positioned between the block stone gap of the roadbed and the gap between the mould bag protection layer and the roadbed; according to the arrangement position of the grouting pipe, a through hole for penetrating through the grouting pipe is arranged at the top of the mould bag protective layer.
In this embodiment, the roadbed side slope adopts the combination support form of mould bag concrete and slip casting, has increased the wholeness of roadbed through the slip casting than current single block stone side slope protection, sets up mould bag inoxidizing coating in addition in the roadbed side, utilizes mould bag inoxidizing coating to weaken the washing of rivers and restrict the coming off of roadbed material for the roadbed receives rivers washing and erosion difficult void, has guaranteed construction quality.
Preferably, as shown in fig. 3-4, on the basis of embodiment 1, the grouting pipe is divided into a plurality of grouting pipe units, and each grouting pipe unit comprises a plurality of grouting straight pipes 4-1 distributed along a side slope, an elbow joint 4-2 connected between two adjacent grouting straight pipes, and a plug 4-3 arranged on one grouting straight pipe; the grouting straight pipe is connected into a tubular structure through an elbow joint, and a plug is arranged at the end head of the tubular structure; a plurality of grouting holes 4-4 are arranged on the vertical pipeline at intervals, and the interval range is 400 mm-600 mm. In order to prevent the grouting pipe from moving, the grouting pipe is fixed on the stone block by a U-shaped clamping ring 4-5.
The vertical pipe of the grouting pipe unit passes through the die bag to play a role of fixing the die bag; the external grouting equipment is used for injecting mortar from one end of the tubular structure, which is not blocked, and delivering the mortar to the space between the mould bag protective layer and the roadbed slope through the tubular structure, and flowing out from the grouting holes. In addition, the grouting pipe has the characteristic of being spliced, every two grouting pipes are connected through the elbow joint, and the elbow joint is provided with threads, so that the grouting pipe can be spliced rapidly, and the construction efficiency is improved.
Preferably, as shown in fig. 2, on the basis of the embodiment 1, a V-shaped structure is adopted for the toe, the protective layer of the mould bag is divided into a lower V-shaped supporting layer 5-1 and an upper plane layer 5-2, the V-shaped supporting layer is arranged in the toe, the mould bag is limited through the toe, and the protective layer of the mould bag is prevented from falling off from the side slope; the plane layer covers the side slope surface, and the plane layer weakens the washing of the inner side of the protection layer of the mould bag by water flow.
The foregoing is merely illustrative of the present invention and is not intended to limit the scope of the invention, which is defined by the claims and their equivalents.
Claims (10)
1. The stone throwing and silting construction method for the wading roadbed is characterized by comprising the following steps of: the method comprises the following steps:
s1: backfilling a block stone in a road construction wading area until the elevation of the block stone is higher than that of the area above the water surface;
s2: cleaning sludge on two sides of a roadbed, and arranging a toe at the bottom of a slope of the roadbed;
s3: repeating the steps S1-S2 until the construction of the wading roadbed is completed, and flattening the roadbed surface and the side slope;
s4: firstly paving a grouting pipeline on a side slope, and then paving a mould bag, wherein the bottom shape of the mould bag is matched with a slope foot;
s5: filling concrete into the mould bags to form a roadbed slope protection layer;
s6: after the concrete in the mould bags is solidified, grouting is carried out in the block stone gaps by a grouting pipe.
2. The construction method for casting and dredging the wading roadbed according to claim 1, wherein the construction method comprises the following steps: in the step S1, filling a large-grain-size stone block into a road construction wading area until the top surface of the large-grain-size stone block layer is higher than a silt layer; and filling the stone blocks with different particle sizes to the upper part of the stone block layer with large particle sizes until the elevation of the stone block layer with different particle sizes is higher than the area above the water surface.
3. The construction method for casting and dredging the wading roadbed according to claim 1, wherein the construction method comprises the following steps: step S2 is divided into the following steps
S1: when the roadbed is backfilled to the water surface, immediately cleaning and transporting away the silt extruded to the two sides by the roadbed by using a long-arm excavator;
s12: using a slurry pump to clean a small amount of sludge left on two sides of the roadbed;
s13: digging grooves on the bottoms of side slopes on two sides of the roadbed by using a long-arm digger or a digger ship; and bedding with large-grain-size stone blocks in the grooves, then paving broken stones, and checking paving effect under water by divers.
4. The construction method for casting and dredging the wading roadbed according to claim 1, wherein the construction method comprises the following steps: in the step S3, after the roadbed is higher than the water surface, filling the collected and matched broken stone into gaps between the stones by using an excavator, and leveling, rolling and compacting; and then, uniformly paving small-sized stones on the side slope to ensure the preliminary leveling of the side slope.
5. The construction method for casting and dredging the wading roadbed according to claim 1, wherein the construction method comprises the following steps: in the step S4, the grouting pipe is divided into a plurality of grouting units, and each grouting unit is distributed at intervals; the single grouting unit is installed along the direction of the roadbed slope and is fixed on the stone by a U-shaped clamping ring, so that the grouting pipe is tightly connected with the stone, and the opening of the grouting pipe is checked to be unobstructed and not blocked before installation;
the slope toe adopts a V-shaped slope toe; the method comprises the steps of pre-distributing the mould bags on site bank slopes according to construction sequence and azimuth after entering the mould bags, and paving geotechnical mould bag units along the construction direction of the bank lines; the mould bags are of an integral structure, and the V-shaped mould bag structure paved at the bottom of the side slope is manufactured and molded during production, so that the mould bags are more stable after concrete construction; forming holes on the grouting pipe part of the top mould bag, and installing a sleeve bag; in order to facilitate the pouring of mortar in the mould bag, a sleeve bag is sewed at a mortar pouring port on the mould bag, and external mortar pouring equipment passes through the sleeve bag and enters the mould bag.
6. The construction method for casting and dredging the wading roadbed according to claim 1, wherein the construction method comprises the following steps: in step S5, all the mould bags are required to be ensured to be in a wet state before filling concrete into the mould bags; when filling is started, pumping cement mortar once to lubricate the pipeline, and immediately filling after the first pumping; the filling sequence is sequentially and continuously carried out from bottom to top, the filling interval time is not more than 30 minutes, and the filling speed is 10-15 m 3 And/h, the filling pressure is 0.2-0.3 Mpa.
7. The construction method for casting and dredging the wading roadbed according to claim 1, wherein the construction method comprises the following steps: in step S6, cement-water glass double-liquid grouting is adopted, the double-liquid grouting is mainly controlled by grouting amount which is 100-200 kg/m 3 Grouting pressure is 0.3-0.6 MPa, and each grouting outlet is 400-600 mm apart; the slurry can be injected under pressure only after being fully and uniformly stirred by a stirrer, and is continuously and slowly stirred in the grouting process, the stirring time is not less than the initial setting time, and the slurry is filtered by a screen before being pumped.
8. A side slope protective structure for wading road bed, its characterized in that: the mould bag protection layers are connected with each other along the length direction of the roadbed and are arranged on side slopes of the roadbed, the top of each mould bag protection layer is placed on the top surface of the roadbed, the bottom of each mould bag protection layer is placed in the corresponding slope toe, and the middle of each mould bag protection layer is covered on the corresponding slope; the grouting layer is positioned between the block stone gap of the roadbed and the gap between the mould bag protection layer and the roadbed; according to the arrangement position of the grouting pipe, a through hole for penetrating through the grouting pipe is arranged at the top of the mould bag protective layer.
9. The method for casting and dredging out the wading subgrade according to claim 8, which is characterized in that: the grouting pipe is divided into a plurality of grouting pipe units, and each grouting pipe unit comprises a plurality of grouting straight pipes distributed along a side slope, an elbow joint connected between two adjacent grouting straight pipes and a plug arranged on one grouting straight pipe; the grouting straight pipe is connected into a tubular structure through an elbow joint, and a plug is arranged at the end head of the tubular structure; a plurality of grouting holes are arranged on the vertical pipeline at intervals, and the interval range is 400 mm-600 mm.
10. The method for casting and dredging out the wading subgrade according to claim 8, which is characterized in that: the slope toe adopts a V-shaped structure, the mould bag protective layer is divided into a V-shaped supporting layer at the lower part and a plane layer at the upper part, the V-shaped supporting layer is arranged in the slope toe, and the plane layer covers the surface of the slope.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311249801.7A CN117265935A (en) | 2023-09-25 | 2023-09-25 | Stone throwing and silting construction method for wading roadbed and side slope protection structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311249801.7A CN117265935A (en) | 2023-09-25 | 2023-09-25 | Stone throwing and silting construction method for wading roadbed and side slope protection structure |
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| Publication Number | Publication Date |
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| CN117265935A true CN117265935A (en) | 2023-12-22 |
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| CN202311249801.7A Pending CN117265935A (en) | 2023-09-25 | 2023-09-25 | Stone throwing and silting construction method for wading roadbed and side slope protection structure |
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| CN (1) | CN117265935A (en) |
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