CN114592394A - Opposite-pulling anchor type highway bilateral widening structure without newly-built land and construction method - Google Patents

Abstract

The invention belongs to the technical field of roadbed engineering, and discloses a double-side widening structure of a double-pull anchor type highway without newly acquired land and a construction method.

Description

Opposite-pulling anchor type highway bilateral widening structure without new land and construction method

Technical Field

The invention belongs to the technical field of roadbed engineering, and particularly relates to a double-side widening structure of a split anchor type highway without new land and a construction method.

Background

With the development of unmanned automobiles in China, special lanes need to be built, the existing roads need to be widened, lifted and reformed, the existing high-grade roads in wide areas in China are mostly higher than the ground surface in the form of embankments, the conventional widening method needs to widen the new land synchronously from top to bottom according to the original slope ratio, and the road repairing cost is higher and lower and the environment is worse due to the limitation that the expropriation and removal cost is higher year by year, the coordination difficulty is higher and higher, the solid wastes of factories cannot be discharged and the like.

In order to avoid land expropriation and removal and fully utilize solid waste, a new embankment form which occupies less land or occupies less land, consumes the solid waste and saves investment is urgently needed.

Disclosure of Invention

In view of the problems raised by the background art described above, the present invention has an object to: aiming at providing a double-side widening structure of a split anchor type highway without new land and a construction method.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows: a double-side widening structure of a split anchor type highway without newly acquired land and a construction method thereof comprise double-side sheet walls, pull anchors, zigzag excavation lines and filling materials, wherein foundations are arranged below the double-side sheet walls.

Further limiting, the double-side thin plate wall is cast by adopting on-site reinforced concrete or assembled by adopting prefabricated light plates on-site, and due to the design, the construction scheme can be flexibly selected according to the construction period.

Further limiting, the pulling anchors are horizontally arranged, the horizontal and vertical distances among the pulling anchors are arranged between 2.5m and 4.0m, and the distance between the pulling anchor on the uppermost layer and the road surface is more than 3 m.

Further, the zigzag excavation line is formed by excavating on the slope surface line of the original embankment, mechanical excavation or manual excavation can be adopted, and the design is favorable for stable occlusion of the new embankment and the old embankment.

Further, the anchor is an anchor rod made of steel bars or an anchor cable made of steel strands, and by the design, the anchor rod and the anchor cable are low in manufacturing cost and can be well combined with an original embankment.

Further, guard rails are arranged on the double-side thin plate walls, deformation joints are arranged at intervals of 15 +/-5 m between the double-side thin plate walls and the foundation, and the design can prevent the road surface from being damaged by expansion with heat and contraction with cold.

Further limiting, during construction of the filling material, the filling material can be light materials such as foamed fluid soil, fly ash and cement, or the fly ash and cement are filled, and when the foamed fluid soil material is adopted, a pumping method can be used for filling and vibration-free construction; when the fly ash and cement materials are adopted, the construction can be carried out by adopting a layering rolling or tamping method, and the filling layer can be fully tamped by the design, so that the filling layer is fully combined with the old embankment.

Further inject, when former embankment has more than the two-stage, can set up in upper portion step position and draw two sides of anchor formula highway and widen the structure, be provided with vertical micro pile under the basis, such design can pass the below ground with the load that increases, guarantees embankment safety and stability.

Further limiting, the miniature pile and the foundation cast-in-place reinforced concrete are integrated, the diameter of the miniature pile is 15 +/-5 cm, the depth of the miniature pile entering the original ground is more than 3m, the miniature pile can adopt a grouting steel flower tube process or a lower small reinforcement cage cement injection process, and by the design, the combination of the miniature pile and the foundation 1 is fully ensured, and meanwhile, the ground holding force is enough.

The invention also provides a construction method of the double-side widened structure of the anchor type highway without new land, which comprises the following steps:

s1: construction and setting-out are carried out on a flat field, the slope surface line of the original road is excavated into a saw-toothed excavation line,

s2: performing anchor pulling construction, drilling a horizontal hole by a drilling machine by selecting a drill rod with the diameter of 10-20cm, installing a full-length steel sleeve protection arm in the horizontal hole, setting the horizontal and vertical distances among a plurality of anchor pulling devices between 2.5m and 4.0m, setting the distance between the anchor pulling device at the uppermost layer and a road surface to be more than or equal to 3m,

s3: constructing a foundation, arranging deformation joints at intervals of 15m, arranging deformation joints at intervals of about 15m, and anchoring a pull anchor at the bottom layer and the foundation into a whole; the anchor is an anchor rod made of steel bars or an anchor cable made of steel strands; cement paste needs to be poured for sealing and corrosion prevention; when the anchor rod is adopted, the anchor hole is firstly filled with cement paste, then welded with the steel bar in the foundation and then poured with concrete into a whole; when the anchor cable is adopted, the anchor cable needs to be coated with a PVC pipe with a grease jacket and then is filled with cement paste for sealing, the anchor cable is isolated from the cement paste, an anchor backing plate can be arranged on the outer side of the foundation, two sides of the anchor backing plate can be subjected to preliminary tensioning,

s4: constructing the double-sided thin plate wall, integrating the double-sided thin plate wall with a foundation, anchoring the middle layer and the upper layer with the double-sided thin plate wall into a whole, anchoring the middle layer and the upper layer with the double-sided thin plate wall according to the step 3,

s5: after the concrete and cement paste of the foundation, the double-side thin plate wall and the anchor are cured to reach the designed strength, the filling material is used for construction,

s6: when the anchor is an anchor cable, secondary tensioning is carried out after the filling material reaches the design strength until the design tensile strength is reached,

s7: paving the roadbed and the road surface,

s8: and installing protective guards on the double-side thin plate walls.

The invention has the following beneficial effects:

in the scheme, the double side walls of the whole new embankment structure are pulled to form a whole, so that the anti-slip and anti-overturning stability is ensured, the newly increased load is directly transmitted to the lower stable foundation through the foundation and the miniature pile, the influence on the original embankment is small, the safety of the whole embankment is ensured, the new land is not required, the solid waste is fully used, and good economic and ecological benefits are achieved;

drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic construction diagram 1 of an embodiment of a double-sided widening structure of a split anchor type highway without new land according to the invention;

FIG. 2 is a schematic construction diagram of an embodiment of a double-sided widening structure of a split anchor type highway without new land according to the present invention;

the main element symbols are as follows:

the foundation comprises a foundation 1, double-side thin plate walls 2, pull anchors 3, filling materials 4, sawtooth-shaped excavation lines 5, guard rails 6 and micro piles 7.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

As shown in fig. 1-2, the anchor type highway bilateral widening structure without new land feature comprises bilateral thin plate walls 2, anchor anchors 3, zigzag excavation lines 5 and filling materials 4, wherein a foundation 1 is arranged below the bilateral thin plate walls 2.

Preferably, the double-side thin plate wall 2 is cast by adopting reinforced concrete on site or assembled by adopting prefabricated light-weight plates on site, and due to the design, the construction scheme can be flexibly selected according to the construction period time, and actually, other construction schemes can be considered according to specific conditions.

Preferably, the anchor anchors 3 are horizontally arranged, the horizontal and vertical distances between the anchor anchors 3 are 2.5m-4.0m, and the anchor on the uppermost layer is more than 3m away from the road surface.

Preferably, the zigzag excavation line 5 is formed by excavating on the slope surface of the original embankment, and mechanical excavation or manual excavation can be adopted, so that the design is favorable for stable occlusion of the new embankment and the old embankment.

Preferably, the anchor 3 is an anchor rod made of steel bars or an anchor cable made of steel strands, and by adopting the design, the anchor rod and the anchor cable are low in manufacturing cost, and can be well combined with an original embankment, and actually, other combination modes can be considered according to specific conditions.

Preferably, the protective guard 6 is arranged on the double-side thin plate walls 2, and the deformation joints are arranged at intervals of 15 +/-5 m between the double-side thin plate walls 2 and the foundation 1, so that the road surface can be prevented from being damaged by expansion with heat and contraction with cold.

When the filling material 4 is preferably constructed, the filling material 4 can be filled by adopting light materials such as foamed fluid soil, fly ash and cement, or by adopting the fly ash and cement materials, and when the foamed fluid soil material is adopted, a pumping method can be used for pouring and vibration-free construction; when the fly ash and the cement material are adopted, the construction can be carried out by adopting a layering rolling or tamping method, the filling layer can be fully tamped by the design, the filling layer is fully combined with the old embankment, and actually, other fillers can be considered according to specific conditions.

When preferred former embankment has more than the two-stage, can set up in upper portion step position and draw anchor formula highway two sides to widen the structure, be provided with vertical miniature stake 7 under the basis 1, such design can reach subaerial with the load that increases, guarantees embankment safety and stability, in fact, also can consider other ground structures of grabbing according to particular case.

Preferably, the micro pile 7 and the foundation 1 are integrated by cast-in-place reinforced concrete, the diameter of the micro pile 7 is 15 +/-5 cm, the depth of the micro pile is more than 3m below the original ground, the micro pile 7 can adopt a steel perforated pipe grouting process or a small steel reinforcement cage grouting process, the design fully ensures the combination of the micro pile 7 and the foundation 1, and meanwhile, the ground holding force is enough, and in fact, other construction processes can be considered according to specific conditions.

The embodiment 1 is a double-side widening structure of a split anchor type highway without new land, and the specific structure refers to fig. 1.

The concrete construction steps are as follows:

s1: and (5) carrying out construction and setting-out on a leveling field, and forming a serrated excavation line 5 on the surface line of the original road embankment by adopting mechanical excavation or artificial excavation.

S2: firstly, constructing a pull anchor 3, forming a horizontal hole with the diameter of 10-20cm by using a drilling machine, and adopting a full-length steel sleeve protection arm to follow up to avoid the sinking of the embankment caused by hole collapse. The horizontal and vertical distances between the plurality of anchor blocks are set between 2.5m and 4.0m, the distance between the uppermost anchor block and the road surface is greater than 3m, and the influence of subgrade settlement on traffic safety caused by construction is avoided.

S3: constructing a foundation 1, arranging deformation joints at intervals of 15m, and anchoring a bottom layer pull anchor 3 and the foundation 1 into a whole; the anchor 3 is an anchor rod made of steel bars or an anchor cable made of steel strands; cement paste needs to be poured for sealing and corrosion prevention; when the anchor rod is adopted, the anchor hole is firstly filled with cement paste, then welded with the steel bar in the foundation 1 and then poured with concrete into a whole; when the anchor cable is adopted, the anchor cable needs to be coated with a PVC pipe with a grease jacket and then is filled with cement paste for sealing, the anchor cable is isolated from the cement paste, and two sides of the anchor pad arranged outside the foundation 1 can be subjected to preliminary tensioning (straightening).

S4: and (3) constructing the double-side thin plate wall 2, integrating the double-side thin plate wall 2 with the foundation 1, and pouring the reinforced concrete on site or assembling the double-side thin plate wall 2 on site by adopting a prefabricated light-duty plate. The middle layer and the upper layer of the anchor 3 are anchored with the double-side thin plate wall 2 into a whole; the anchor 3 is an anchor rod made of steel bars or an anchor cable made of steel strands; cement paste needs to be poured for sealing and corrosion prevention; when the anchor rod is adopted, cement slurry is poured into the anchor hole, and then the anchor hole is welded with the steel bars in the thin plate walls 2 at the two sides and then concrete is poured into a whole; when the anchor cable is adopted, the anchor cable needs to be coated with a PVC pipe with a grease jacket and then is filled with cement paste for sealing, the anchor cable is isolated from the cement paste, and the anchor backing plate can be arranged on the outer side of the double-side thin-plate wall 2 to be stretched (straightened) preliminarily.

S5: after the concrete and cement paste of the foundation 1, the thin plate wall 2 and the anchor 3 are cured to reach the designed strength, the filling material 4 is constructed, and light materials such as foam fluid soil, fly ash and cement can be adopted. When the foam fluid soil material is adopted, a pumping method can be used for filling vibration-free construction; when the fly ash and cement material are adopted, the construction can be carried out by adopting a layering rolling or tamping method.

S6: when the anchor 3 adopts an anchor cable, the secondary tensioning is carried out after the filling material 4 reaches the design strength until the design tensile strength is reached.

S6: and paving the roadbed and the road surface.

S7: guard rails 6 are installed on the double-sided sheet wall 2.

The embodiment 2 is a double-side widening structure of a split anchor type highway without new land, and the specific structure refers to fig. 2.

The concrete construction steps are as follows:

s1: and (3) carrying out construction and paying off on a flat site, and mechanically excavating the slope surface line of the original embankment or artificially excavating to form a zigzag excavation line 5 at the middle upper part, so that the original step is widened to 3m, and the construction of a miniature pile drilling machine is facilitated.

S2: firstly, constructing a pull anchor 3, forming a horizontal hole with the diameter of 10-20cm by using a drilling machine, and adopting a full-length steel sleeve protection arm to follow up to avoid the sinking of the embankment caused by hole collapse. The horizontal and vertical distances between the plurality of anchor blocks are set between 2.5m and 4.0m, the distance between the uppermost anchor block and the road surface is greater than 3m, and the influence of subgrade settlement on traffic safety caused by construction is avoided.

S3: the micro pile 7 is constructed, the diameter of a formed hole is 15cm, the depth of the formed hole is more than 3m below the original ground, and the micro pile can adopt a grouting steel floral tube process or a lower small reinforcement cage grouting cement process.

S4: constructing the foundation 1, arranging deformation joints at intervals of 15m, and anchoring the micro-piles 7 and the bottom layer pull anchors 3 with the foundation 1 into a whole. The anchor 3 is an anchor rod made of steel bars or an anchor cable made of steel strands; cement paste needs to be poured for sealing and corrosion prevention; when the anchor rod is adopted, the anchor hole is firstly filled with cement paste, then welded with the steel bar in the foundation 1 and then poured with concrete into a whole; when the anchor cable is adopted, the anchor cable needs to be coated with a PVC pipe with a grease jacket and then is filled with cement paste for sealing, the anchor cable is isolated from the cement paste, and two sides of the anchor pad arranged outside the foundation 1 can be subjected to preliminary tensioning (straightening).

S5: and (3) constructing the double-side thin plate wall 2, integrating the double-side thin plate wall 2 with the foundation 1, and pouring the reinforced concrete on site or assembling the double-side thin plate wall 2 on site by adopting a prefabricated light-duty plate. The middle layer and the upper layer of the anchor 3 are anchored with the double-side thin plate wall 2 into a whole.

The anchor 3 is an anchor rod made of steel bars or an anchor cable made of steel strands; cement paste needs to be poured for sealing and corrosion prevention; when the anchor rod is adopted, cement slurry is poured into the anchor hole, and then the anchor hole is welded with the steel bars in the thin plate walls 2 at the two sides and then concrete is poured into a whole; when the anchor cable is adopted, the anchor cable needs to be coated with a PVC pipe with a grease jacket and then is filled with cement paste for sealing, the anchor cable is isolated from the cement paste, and the anchor backing plate can be arranged on the outer side of the double-side thin-plate wall 2 to be stretched (straightened) preliminarily.

S6: after the concrete and cement paste of the foundation 1, the double-side thin plate walls 2 and the pull anchors 3 are cured to reach the designed strength, the filling material 4 is constructed, and light materials such as foam fluid soil, fly ash and cement can be adopted. When the foam fluid soil material is adopted, a pumping method can be used for filling vibration-free construction; when the fly ash and cement material are adopted, the construction can be carried out by adopting a layering rolling or tamping method.

S7: when the anchor 3 adopts an anchor cable, the secondary tensioning is carried out after the filling material 4 reaches the design strength until the design tensile strength is reached.

S6: and paving the roadbed and the road surface.

S7: guard rails 6 are installed on the double-sided sheet wall 2.

The two side walls of the whole new embankment structure in the embodiment are oppositely pulled to form a whole, so that the anti-slip and anti-overturning stability is guaranteed, newly added loads are directly transferred to the lower stable foundation through the foundation and the miniature piles, the influence on the original embankment is very small, the safety of the whole embankment is guaranteed, the land does not need to be newly built, solid wastes are fully used, and good economic and ecological benefits are achieved.

The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a need not sign two sides of land split anchor formula highway and widen structure which characterized in that: the double-side thin plate wall comprises double-side thin plate walls (2), pull anchors (3), sawtooth-shaped excavation lines (5) and filling materials (4), wherein a foundation (1) is arranged below the double-side thin plate walls (2).

2. The double-sided widening structure of the anchor type highway without new land as claimed in claim 1, wherein: the double-side thin plate wall (2) is cast by adopting reinforced concrete on site or assembled by adopting a prefabricated light plate on site.

3. The double-sided widening structure of the anchor type highway without new land as claimed in claim 2, wherein: the anchor anchors (3) are horizontally arranged, the horizontal and vertical distances among the anchor anchors (3) are set between 2.5m and 4.0m, and the distance between the anchor on the uppermost layer and the road surface is more than 3 m.

4. The double-sided widening structure for the anchor type road pulled in opposite directions without new land as claimed in claim 3, wherein: the zigzag excavation line (5) is formed by excavating on the slope surface line of the original road, and can adopt mechanical excavation or manual excavation.

5. The double-sided widening structure of the anchor type highway without new land as claimed in claim 4, wherein: the pull anchor (3) is an anchor rod made of steel bars or an anchor cable made of steel strands.

6. The double-sided widening structure of the anchor type highway without new land as claimed in claim 5, wherein: guard rails (6) are arranged on the double-side thin plate walls (2), and deformation joints are arranged at intervals of 15 +/-5 m between the double-side thin plate walls (2) and the foundation (1).

7. The double-sided widening structure of the anchor type highway without new land as claimed in claim 6, wherein: when the filling material (4) is constructed, the filling material (4) can be made of light materials such as foamed fluid soil, fly ash and cement, or the light materials such as fly ash and cement are filled, and when the foamed fluid soil material is adopted, a pumping method can be used for filling and vibration-free construction; when the fly ash and cement material are adopted, the construction can be carried out by adopting a layering rolling or tamping method.

8. The double-sided widening structure of the anchor type highway without new land as claimed in claim 7, wherein: when the original embankment has more than two stages, a pull anchor type highway bilateral widening structure can be arranged at the upper step position, and a vertical micro pile (7) is arranged below the foundation (1).

9. The double-sided widening structure of the anchor type highway without new land as claimed in claim 8, wherein: the miniature pile (7) and the cast-in-place reinforced concrete of the foundation (1) are integrated, the diameter of the miniature pile (7) is 15 +/-5 cm, the depth of the miniature pile entering the original ground is more than 3m, and the miniature pile (7) can adopt a steel perforated pipe grouting process or a small steel reinforcement cage lower cement grout grouting process.

10. A construction method for pulling anchor type highway double-side widened structure without new land according to any one of claims 1-9, comprising:

s1: construction and setting-out are carried out on a flat field, the slope surface line of the original road is excavated into a saw-toothed excavation line,

s2: performing anchor pulling construction, drilling a horizontal hole by a drilling machine by selecting a drill rod with the diameter of 10-20cm, installing a full-length steel sleeve protection arm in the horizontal hole, setting the horizontal and vertical distances among a plurality of anchor pulling devices between 2.5m and 4.0m, setting the distance between the anchor pulling device at the uppermost layer and a road surface to be more than 3m,

s3: constructing a foundation, arranging deformation joints at intervals of 15m, arranging deformation joints at intervals of about 15m, and anchoring a pull anchor at the bottom layer and the foundation into a whole; the anchor is an anchor rod made of steel bars or an anchor cable made of steel strands; cement paste needs to be poured for sealing and corrosion prevention; when the anchor rod is adopted, the anchor hole is firstly filled with cement paste, then welded with the steel bar in the foundation and then poured with concrete into a whole; when the anchor cable is adopted, the anchor cable needs to be coated with a PVC pipe with a grease jacket and then is filled with cement paste for sealing, the anchor cable is isolated from the cement paste, an anchor backing plate can be arranged on the outer side of the foundation, two sides of the anchor backing plate can be subjected to preliminary tensioning,

s4: constructing the double-sided thin plate wall, integrating the double-sided thin plate wall with a foundation, anchoring the middle layer and the upper layer with the double-sided thin plate wall into a whole, anchoring the middle layer and the upper layer with the double-sided thin plate wall according to the step 3,

s5: after the concrete and cement paste of the foundation, the double-side thin plate wall and the anchor are cured to reach the designed strength, the filling material is used for construction,

s6: when the anchor is an anchor rope, secondary tensioning is carried out after the filling material reaches the design strength until the design tensile strength is reached,

s7: paving the roadbed and the road surface,

s8: and installing protective guards on the double-side thin plate walls.

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