CN112411286A - Active highway embankment grouting reinforcement structure and construction method - Google Patents
Active highway embankment grouting reinforcement structure and construction method Download PDFInfo
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- CN112411286A CN112411286A CN202011241017.8A CN202011241017A CN112411286A CN 112411286 A CN112411286 A CN 112411286A CN 202011241017 A CN202011241017 A CN 202011241017A CN 112411286 A CN112411286 A CN 112411286A
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- 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
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- 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
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- 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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Abstract
The invention provides a grouting reinforcement structure for an active highway embankment and a construction method thereof, wherein orthogonal guide holes are drilled on side slopes on two sides of the embankment, a working well is excavated under a central isolation belt, inclined or horizontal drilling is sequentially carried out from the working well to two sides to form a horizontal guide hole, an upper inclined guide hole and a lower inclined guide hole, then a grouting pipe is installed in the guide holes, cement slurry is uniformly pressed into the grouting guide holes through the grouting pipe, hole sealing concrete is adopted for hole sealing, grouting and hole sealing of all grouting guide holes are sequentially completed according to the drilling sequence, finally light concrete backfilling is carried out on the lower part of the working well, and planting soil backfilling is carried out on the upper part.
Description
Technical Field
The invention relates to the technical field of road maintenance and reinforcement, in particular to an active highway embankment grouting reinforcement structure and a construction method.
Background
With the high-speed development of economy in China, the traffic road network is more and more perfect. A highway meets a plurality of diseases in the operation process, and the common highway diseases mainly comprise water damage, collapse, landslide, subsidence, pavement damage and the like. The occurrence of these diseases is generally caused by traveling and various natural factors, except for the design factors and the construction quality, and water and an overweight load are main factors. Aiming at the problem that the road traffic is endangered by the diseases, corresponding road disease control measures are required to be taken.
At present, the prevention and treatment measures for highway diseases mainly comprise two main modes of breaking regeneration and repairing and reinforcing. If the crushing regeneration technology is adopted to treat the road diseases, the technical problems of large project amount, high manufacturing cost and long construction period exist; compared with the prior art, the repair and reinforcement technology is used for grouting and reinforcing the base layer, and is more commonly used for preventing and treating diseases such as highway subgrade, pavement, side slope, tunnel and the like because the grouting, reinforcement and repair technology is flexible, convenient and fast to construct and suitable for various complex geological conditions. At present, the grouting reinforcement of the road embankment of the highway in active service generally adopts the technology of grouting from the outside to the inner drilling holes, and particularly, if the technology is vertical drilling holes, the pavement structure and the integrity of the pavement structure can be damaged, the pavement structure needs to be repaired in the later period, the normal operation of traffic is influenced, and the uniform and comprehensive grouting is difficult to realize for the ultra-wide highway with a central isolation belt, so that the stress concentration is obvious, the uneven deformation is easy to occur, and the service function and the service life of the pavement are influenced.
Therefore, there is a need to find a grouting reinforcement structure and construction method for an active highway embankment that can solve the above technical problems.
Disclosure of Invention
The invention aims to provide a grouting reinforcement structure and a construction method for an active highway embankment, which are simple and convenient to construct, can perform comprehensive and uniform grouting from outside to inside and from inside to outside, and can quickly recover traffic.
In order to achieve the above purpose, the technical scheme provides a construction method of an active highway embankment grouting reinforcement structure, which is used for grouting the active highway embankment and comprises the following steps:
step 1: the construction operation well is implemented in the central isolation zone of the road surface of the existing highway embankment: removing vegetation in the central isolation belt at a certain distance, then excavating downwards to form a working well, and then spraying concrete to the wall of the working well to reinforce the support;
step 2: determining the plane position of a drilling position, drilling grouting guide holes towards a grouting reinforcement section of the existing highway embankment in a side slope and a working well, wherein the side slope drilling holes on two sides of the embankment form orthogonal guide holes, the working well drilling holes form a horizontal guide hole, an upper inclined guide hole and a lower inclined guide hole, and the row spacing of all the drilling holes is determined according to the mutual overlapping of the diffusion radius of cement slurry;
and step 3: sequentially injecting cement slurry into the grouting leading holes from low to high from outside to inside;
and 4, step 4: the working well structure is characterized in that the upper part of the working well structure is a small opening, the lower part of the working well structure is a large opening, the middle of the working well structure is provided with a transition section, a waterproof layer is paved on the wall of the transition section of the working well, then light concrete is backfilled in the large opening, the backfilling is carried out until the junction of the transition section and the upper small opening, the complete waterproof layer is paved on the upper surface of the light concrete, a concrete support at the upper small opening is chiseled off, the backfilling of planting soil is carried out, and finally vegetation on the central isolation.
According to a second aspect of the invention, an active highway embankment grouting reinforcement structure is provided, which is constructed according to a construction method of the active highway embankment grouting reinforcement structure.
Compared with the prior art, the technical scheme has the following characteristics and beneficial effects:
compared with the prior art, the construction method has the advantages that the working well is constructed in the central isolation zone of the active highway, the reasonability of the arrangement of grouting guide holes and the drilling efficiency can be effectively improved, the waterproof layer is arranged during backfilling of the working well, the underwater seepage of the central isolation zone of the pavement is effectively avoided, the hydraulic erosion embankment is blocked, and the technical advantages are obvious.
The orthogonal lead hole, the horizontal lead hole, the upper inclined lead hole and the lower inclined lead hole are arranged, so that the damage to a road surface structure of a highway can be effectively avoided, the integral integrity of the road surface is ensured, the service performance of the highway in service can be recovered without major overhaul, the energy is saved, the consumption is reduced, and the economic benefit is obvious.
The grouting reinforcement process adopted by the invention is convenient to operate, simple in equipment, and capable of realizing parallel large-scale construction and shortening the construction period.
Drawings
Fig. 1 is a schematic view of an active highway embankment grouting reinforcement structure according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a work well configuration according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a work well arrangement according to an embodiment of the present invention.
Fig. 4 is a schematic elevation view of a grouting lead hole arrangement according to an embodiment of the invention.
Fig. 5 is a schematic plan view of an arrangement of grout introduction holes according to an embodiment of the present invention.
FIG. 6 is a schematic illustration of a grouting operation according to an embodiment of the invention.
FIG. 7 is a schematic illustration of the backfilling of a work well according to an embodiment of the invention.
Wherein: 1-side slope; 2-orthogonal lead holes; 3-road surface; 4-central isolation zone; 5-working well; 6-support; 7-grouting pipe; 8-horizontal guide hole; 9-upper inclined lead hole; 10-a downward inclined lead hole; 11-small upper opening; 12-transition section; 13-big lower opening; 14-planting soil; 15-waterproof layer; 16-light concrete; 17-hole sealing concrete; 18-cement grout; 19-grouting and leading holes; 20-light hole leading machine; and 21, pressing a pulp machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
The technical solution of the present invention is further explained below with reference to the accompanying drawings, such as fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7.
The first aspect of this scheme provides an active service highway embankment slip casting reinforced structure, carries out the slip casting processing to active service highway embankment, and wherein active service highway embankment arranges side slope (1) of both sides and arranges road surface (3) on side slope (1) in including the slope, and the intermediate position on road surface (3) is equipped with central median (4), includes:
the construction method comprises the steps of setting orthogonal guide holes (2) on side slopes (1) on two sides of an active highway embankment, setting a working well (5) below a central isolation zone (4) of a pavement (3) on the top side of the active highway embankment, sequentially drilling a horizontal guide hole (8), an upper inclined guide hole (9) and a lower inclined guide hole (10) from the working well (5) to two sides in an inclined or horizontal mode, injecting cement slurry (18) into the orthogonal guide holes (2), the horizontal guide hole (8), the upper inclined guide hole (9) and the lower inclined guide hole (10) and sealing the holes, and backfilling light concrete (16) and planting soil (14) inside the working well (5).
The structure of the working well (5) is a small opening (11) at the upper part and a large opening (13) at the lower part, a transition section (12) is arranged in the middle, and concrete is sprayed on the well wall of the working well (5) to reinforce the support (6), namely the well wall of the working well (5) is provided with the support (6). Wherein the small opening (11) and the large opening (13) are both cylindrical structures, and the opening area of the small opening (11) is smaller than that of the large opening (13). In some embodiments, the small openings (11) have an opening diameter that is less than the width of the central isolation zone (4), and the large openings (13) have an opening diameter that is greater than the width of the central isolation zone (4).
A waterproof layer (15) is arranged between the planting soil (14) and the light concrete (16). The light concrete (16) is backfilled in the large opening (13), the waterproof layer (15) surrounds the light concrete (16), and the planting soil (14) is backfilled in the small opening (11). Specifically, the light concrete (16) is backfilled to the junction of the transition section (12) and the upper small opening (11).
The orthogonal lead holes (2) arranged on the side slopes (1) are perpendicular to the side slopes (1), the orthogonal lead holes (2) of the side slopes (1) on two sides are symmetrically arranged, and the hole depth of the orthogonal lead hole (2) close to the road surface (3) is smaller than that of the orthogonal lead hole (2) far away from the road surface (3).
Horizontal lead hole (8) level sets up in road surface (3) direction, and arranges in and goes up oblique lead hole (9) and lead between hole (10) down to one side, goes up oblique lead hole (9) and sets up towards road surface (3) direction, and lead hole (10) to one side down and set up to one side road surface (3) direction. In some embodiments, the horizontal pilot hole (8), the upper inclined pilot hole (9) and the lower inclined pilot hole (10) are arranged symmetrically to the working well (5).
In one embodiment of the scheme, the horizontal lead holes (8) are arranged outside the two ends of the large opening (13) in the lateral direction, the upper inclined lead holes (9) are arranged outside the transition section (12), and the lower inclined lead holes (10) are arranged outside the two sides of the bottom end of the large opening (13).
The orthogonal lead holes (2), the horizontal lead holes (8), the upper inclined lead holes (9) and the lower inclined lead holes (10) are collectively called grouting lead holes (19), and the row spacing of the grouting lead holes (19) is determined according to the mutual overlapping of the diffusion radiuses of the cement grout (18).
The concrete grouting process is as follows: installing slip casting pipe (7) in slip casting inlet (19), evenly impressing cement thick liquid (18) in slip casting inlet (19) through slip casting pipe (7), adopting hole sealing concrete (17) to carry out the hole sealing, accomplish the slip casting and the hole sealing of all slip casting inlets (19) according to drilling order in proper order, wherein drilling order: from low to high, in order from outside to inside.
The diameter of the grouting pipe (7) is slightly smaller than the aperture of the grouting guide hole (19), cement grout (18) is uniformly injected to fill the grouting pipe (7), and simultaneously the cement grout is diffused, infiltrated, filled, compacted and consolidated along the grout outlet of the grouting pipe (7) to the periphery to form a net-shaped grout pulse complex with the soil body of the embankment.
According to a second aspect of the present invention, there is provided a construction method for an active highway embankment grouting reinforcement structure, which performs grouting processing on an active highway embankment, and includes the following steps:
wherein the active highway embankment comprises side slopes (1) which are obliquely arranged on two sides and a pavement (3) arranged on the side slopes (1), and a central isolation belt (4) is arranged in the middle of the pavement (3).
Step 1: as shown in fig. 2 and 3, a construction work well (5) is formed in the central isolation zone (4) of the road surface (3) of the conventional road embankment: removing vegetation in the central isolation belt (4) at a certain distance, then excavating downwards to form a working well (5), and then spraying concrete to the wall of the working well (5) to reinforce the support (6).
The working well (5) is of a pot-shaped structure, the upper portion of the working well is a small opening (11), the lower portion of the working well is a large opening (13), the middle of the working well is provided with a transition section (12), the small opening (11) and the large opening (13) are both of cylindrical structures, and the opening area of the small opening (11) is smaller than that of the large opening (13).
In some embodiments, the small openings (11) have an opening diameter that is less than the width of the central isolation zone (4), and the large openings (13) have an opening diameter that is greater than the width of the central isolation zone (4).
Step 2: determining the plane position of a drilling position, drilling grouting guide holes (19) towards a grouting reinforcement section of the existing highway embankment in a side slope (1) and a working well (5), wherein the side slope (1) on two sides of the embankment is drilled to form orthogonal guide holes (2), the working well (5) is drilled to form horizontal guide holes (8), upper inclined guide holes (9) and lower inclined guide holes (10), and the row spacing of all the drill holes is determined according to the mutual overlapping of the diffusion radius of cement slurry (18).
Specifically, as shown in fig. 4 and 5, a slurry diffusion square net is drawn according to the width of a working surface and the slurry diffusion radius of a grouting reinforcement section of the existing highway embankment, a square net junction is determined as a plane position of a drilling position, a drilling inclination angle is drawn, the hole depth is determined based on the embankment destruction and reinforcement purposes, drilling hole positions and the inclination angle are adjusted, the cement slurry is tried to cover the whole working surface, and the drilling hole positions are distributed on the embankment working surface in a quincunx shape.
And drilling grouting guide holes (19) in the side slopes (1) and the working wells (5) on the two sides of the embankment by using a light guide hole machine (20), wherein the grouting guide holes (19) comprise orthogonal guide holes (2), horizontal guide holes (8), upper inclined guide holes (9) and lower inclined guide holes (10).
The orthogonal lead holes (2) arranged on the side slopes (1) are perpendicular to the side slopes (1), the orthogonal lead holes (2) of the side slopes (1) on two sides are symmetrically arranged, and the hole depth of the orthogonal lead hole (2) close to the road surface (3) is smaller than that of the orthogonal lead hole (2) far away from the road surface (3).
Horizontal lead hole (8) level sets up in road surface (3) direction, and arranges in and goes up oblique lead hole (9) and lead between hole (10) down to one side, goes up oblique lead hole (9) and sets up towards road surface (3) direction, and lead hole (10) to one side down and set up to one side road surface (3) direction. In some embodiments, the horizontal pilot hole (8), the upper inclined pilot hole (9) and the lower inclined pilot hole (10) are arranged symmetrically to the working well (5).
In one embodiment of the scheme, the horizontal lead holes (8) are arranged outside the two ends of the large opening (13) in the lateral direction, the upper inclined lead holes (9) are arranged outside the transition section (12), and the lower inclined lead holes (10) are arranged outside the two sides of the bottom end of the large opening (13).
The grouting holes (19) do not intersect.
And step 3: as shown in fig. 6, cement slurry (18) is injected into the grouting pilot hole (19) from the bottom to the top in the order of the outside to the inside.
The grouting machine (21) is cleaned by water in advance, water is drained, cement grout (18) is prepared, pressure grouting is adopted for reinforcement, the cement grout (18) is used up within half an hour after preparation, and stirring is carried out continuously in the construction process, the grouting pressure is determined through tests and areas and is controlled to be 0.2-2 MPa, grouting is stable on the premise that the injection pressure reaches the design pressure, and the stabilization time is 3-5 minutes.
The concrete grouting process is as follows: the grouting pipe (7) is arranged in the grouting leading hole (19), cement grout (18) which is uniformly injected forms a net-shaped grout pulse complex with the embankment soil body through penetration filling, compaction consolidation and cementation solidification in the embankment soil body, then hole sealing concrete (17) is adopted to seal the grouting leading hole (19), and grouting and hole sealing of all the grouting leading holes (19) are completed sequentially according to the drilling sequence. Wherein the hole sealing concrete (17) is sealed at the opening of the grouting guide hole (19).
Specifically, the diameter of the grouting pipe (7) is slightly smaller than the aperture of the grouting guide hole (19), cement grout (18) is uniformly injected to fill the grouting pipe (7), and simultaneously, the cement grout is diffused, infiltrated, filled, compacted, consolidated and cemented and cured along the grout outlet hole on the grouting pipe (7) to the periphery to form a net-shaped grout pulse complex with the embankment soil body of the active road.
And 4, step 4: as shown in fig. 1 and 7, a waterproof layer (15) is firstly paved on the wall of a transition section (12) of a working well (5), then light concrete (16) is backfilled in a large opening (13) until the boundary of the transition section (12) and an upper small opening (11) is backfilled, a complete waterproof layer (15) is paved on the upper surface of the light concrete (16), a concrete support (6) at the upper small opening (11) is chiseled off, planting soil (14) is backfilled, finally vegetation on a central isolation strip (4) is recovered, and the construction of the grouting reinforcement structure of the active highway embankment is completed.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (8)
1. A construction method of an active highway embankment grouting reinforcement structure is used for grouting processing of an active highway embankment, and is characterized by comprising the following steps:
step 1: constructing a construction operation well (5) on a central isolation zone (4) of a road surface (3) of the existing highway embankment: removing vegetation in the central isolation belt (4) at a certain distance, then excavating downwards to form a working well (5), and then spraying concrete to the wall of the working well (5) to reinforce a support (6);
step 2: determining the plane position of a drilling position, drilling grouting guide holes (19) towards a grouting reinforcement section of the existing highway embankment in a side slope (1) and a working well (5), wherein the side slope (1) on two sides of the embankment is drilled to form orthogonal guide holes (2), the working well (5) is drilled to form horizontal guide holes (8), upper inclined guide holes (9) and lower inclined guide holes (10), and the row spacing of all the drill holes is determined according to the mutual overlapping of the diffusion radius of cement slurry (18);
and step 3: cement grout (18) is injected into the grouting leading holes (19) from bottom to top in sequence from outside to inside;
and 4, step 4: the working well (5) is structurally characterized in that the upper part is a small opening (11), the lower part is a large opening (13), a transition section (12) is arranged in the middle, a waterproof layer (15) is paved on the wall of the transition section (12) of the working well (5), then the large opening (13) is backfilled with light concrete (16) until the boundary of the transition section (12) and the upper part small opening (11), a complete waterproof layer (15) is paved on the upper surface of the light concrete (16), a concrete support (6) at the upper part small opening (11) is chiseled off, the planting soil (14) is backfilled, and finally vegetation on the central isolation belt (4) is recovered.
2. The construction method of the active highway embankment grouting reinforcement structure according to claim 1, wherein the small opening (11) and the large opening (13) are both cylindrical structures, and the opening area of the small opening (11) is smaller than that of the large opening (13).
3. The construction method of the active highway embankment grouting reinforcement structure according to claim 1, wherein a slurry diffusion square net is drawn according to the working face width and the slurry diffusion radius of a grouting reinforcement section of the existing highway embankment, a square net junction is determined as a plane position of a drilling position, a drilling inclination angle is drawn, a hole depth is determined based on embankment destruction and reinforcement purposes, and the drilling hole position and the inclination angle are adjusted.
4. The construction method of the active highway embankment grouting reinforcement structure according to claim 1, wherein the orthogonal lead holes (2) arranged on the side slope (1) are arranged perpendicular to the side slope (1), the horizontal lead holes (8) are arranged horizontally in the direction of the road surface (3) and are arranged between the upper inclined lead holes (9) and the lower inclined lead holes (10), the upper inclined lead holes (9) are arranged towards the road surface (3), and the lower inclined lead holes (10) are arranged back to the road surface (3).
5. The construction method of the active highway embankment grouting reinforcement structure according to claim 1, wherein the orthogonal holes (2) of the two side slopes (1) are symmetrically arranged, and the horizontal hole (8), the upper inclined hole (9) and the lower inclined hole (10) are symmetrically arranged with respect to the working well (5).
6. The construction method of the active highway embankment grouting reinforcement structure according to claim 1, wherein the grouting pipe (7) is arranged in the grouting guide hole (19), the uniformly injected cement grout (18) forms a net-shaped grout vein complex with the embankment soil body through infiltration filling, compaction consolidation and cementation solidification in the embankment soil body, then the grouting guide hole (19) is sealed by using sealing concrete (17), and grouting and sealing of all the grouting guide holes (19) are completed sequentially according to the drilling sequence.
7. The construction method of the active highway embankment grouting reinforcement structure according to claim 1, wherein the grouting pressure is controlled to be 0.2-2 MPa, the grouting is stable on the premise that the grouting pressure reaches the design pressure, and the stabilization time is 3-5 minutes.
8. An active highway embankment grouting reinforcement structure, which is characterized by being constructed according to the construction method of the active highway embankment grouting reinforcement structure disclosed by any one of claims 1 to 7.
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Cited By (2)
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| CN114703874A (en) * | 2022-04-15 | 2022-07-05 | 内蒙古满世煤炭集团点石沟煤炭有限责任公司 | Anti-landslide structure of strip mine refuse dump and construction method thereof |
| CN114703874B (en) * | 2022-04-15 | 2024-04-30 | 内蒙古满世煤炭集团点石沟煤炭有限责任公司 | Anti-slip slope structure of strip mine dumping site and construction method thereof |
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| CN106049195A (en) * | 2016-05-27 | 2016-10-26 | 中铁三局集团有限公司 | Method for strengthening subgrade basement of existing high speed railway line |
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| CN111501796A (en) * | 2020-04-30 | 2020-08-07 | 浙江大学城市学院 | High embankment slope stabilizing structure and construction method |
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| CN114703874B (en) * | 2022-04-15 | 2024-04-30 | 内蒙古满世煤炭集团点石沟煤炭有限责任公司 | Anti-slip slope structure of strip mine dumping site and construction method thereof |
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Application publication date: 20210226 |