CN111042161A - Slope collapse high slope flexible processing structure and construction method thereof - Google Patents
Slope collapse high slope flexible processing structure and construction method thereof Download PDFInfo
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- CN111042161A CN111042161A CN202010015712.6A CN202010015712A CN111042161A CN 111042161 A CN111042161 A CN 111042161A CN 202010015712 A CN202010015712 A CN 202010015712A CN 111042161 A CN111042161 A CN 111042161A
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- slope
- steel pipe
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- grouting
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- 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
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
Abstract
The invention relates to a flexible processing structure for a collapse slope high slope and a construction method thereof. The invention aims to provide a collapse slope volume high slope flexible treatment structure and a construction method thereof, so as to reduce the treatment difficulty, accelerate the construction progress, improve the adaptive deformation capacity and reduce the excavation and environmental pollution. The technical scheme of the invention is as follows: the structure is provided with side slopes excavated from top to bottom in grades, and a berm is arranged corresponding to each grade of side slope; arranging a plurality of steel pipe piles along the berm, wherein the lower ends of the steel pipe piles penetrate through the unconformity boundary line of the stratum, the upper ends of the steel pipe piles are exposed out of the berm, a capping beam combined with the steel pipe piles is poured on the berm, a sash beam is arranged on the slope surface of the side slope, and the lower part of the sash beam is connected with the capping beam on the berm below through an anchoring plate; the anchor plate is fixed on the side slope through a plurality of prestressed anchor cables, and the lattice beam is fixed on the side slope through a plurality of mortar anchor rods. The invention is suitable for civil engineering collapse slope high slopes such as water conservancy, hydropower and traffic.
Description
Technical Field
The invention relates to a flexible processing structure for a collapse slope high slope and a construction method thereof. The method is suitable for slope collapse high slopes of civil engineering such as water conservancy, hydropower and traffic.
Background
The collapse volume is a bad geological phenomenon frequently encountered during side slope excavation, the deformation and the stability of the collapse volume are one of key problems in the field of engineering geology, and particularly in water conservancy and hydropower engineering, the stability of the collapse volume is often the key for construction and safe operation of the engineering.
The high slope of collapse slope product is usually treated by excavating, anti-slide piles, lattice beams and the like:
the excavation scheme has the problems of great environmental damage, difficult stacking of discarded slag and the like, particularly for high slopes and large-volume slope collapse volumes, the disturbance of large-area excavation on the slope collapse volumes is great, construction risks exist in the excavation process, a large amount of slag can form a new artificial slope stability problem, and secondary treatment is needed;
the anti-slide pile scheme is difficult to construct, the construction period is long, the construction safety risk is prominent, when the covering layer is thick, the anti-slide pile is difficult to root, and the rigid anti-slide pile has poor deformation adaptability to the flexible slope collapse body and is easy to crack;
the sash beam can only solve the problem of slope surface shallow layer stability, when collapsing the integrated height of slope, the sash beam is not only difficult to construct, but also the self stability problem is outstanding, and during rainy season, the soil body at the bottom of the sash beam is easy to be emptied and collapsed, and the local stability problem occurs.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the existing problems, the collapse slope high slope flexible treatment structure and the construction method thereof are provided to reduce the treatment difficulty, accelerate the construction progress, improve the adaptive deformation capacity and reduce the excavation and environmental pollution.
The technical scheme adopted by the invention is as follows: the utility model provides a collapse slope volume high slope flexible processing structure which characterized in that: the side slope is excavated from top to bottom in grades, and a berm is arranged corresponding to each grade of side slope;
arranging a plurality of steel pipe piles along the berm, wherein the lower ends of the steel pipe piles penetrate through the unconformity boundary line of the stratum, the upper ends of the steel pipe piles are exposed out of the berm, a capping beam combined with the steel pipe piles is poured on the berm, a sash beam is arranged on the slope surface of the side slope, and the lower part of the sash beam is connected with the capping beam on the berm below through an anchoring plate;
the anchor plate is fixed on the side slope through a plurality of prestressed anchor cables, and the lattice beam is fixed on the side slope through a plurality of mortar anchor rods.
The steel pipe pile is divided into two-sequence pile jumping construction, pipe following drilling is adopted, and the rock entering depth is greater than or equal to 1/3 steel pipe pile length.
4 grouting holes are drilled in the steel pipe pile along the pipe length direction, the steel pipe pile is arranged in a quincunx mode, and 1 anchor bar bundle 328 with the length L equal to 12m and 1 grouting pipe with the diameter phi of 20mm are placed inside the steel pipe pile.
The steel pipe pile is grouted by a hole bottom grout returning method, the distance between the end part of the steel pipe pile and the hole bottom of a pile hole is 10cm, grouting is diluted firstly and then concentrated, the water cement ratio is adjusted according to the grout absorption amount, finally, the hole is sealed by thick grout, the plugging length is generally 10cm, grouting materials are M30 cement mortar, the sand-lime ratio is 1:1, the water cement ratio is 0.38-0.45, the grouting pressure is 0.3-0.5 MPa, the grout shielding pressure is 0.5MPa, and the pressure is stabilized for 5-10 min.
The prestressed anchor cables are connected to the central line of the anchor plate and are arranged at intervals in length, the length of the prestressed anchor cables is controlled according to 8-10 m of anchoring into bedrock, and the prestressed anchor cables are adjusted according to the actual thickness of a covering layer on site.
And grouting, tensioning and locking the prestressed anchor cable, and tensioning the prestressed anchor cable according to 50% of the designed tensioning force.
The mortar anchor rod is arranged at the node of the lattice beam.
And the frame beam, the anchor plate, the capping beam and the steel pipe pile are poured into a whole.
And a drain hole I is reserved on the anchor pulling plate.
A construction method of a collapse slope high slope flexible processing structure comprises the following steps:
excavating the side slope from top to bottom in a grading manner, and protecting the side slope after excavating the side slope for the first time;
arranging steel pipe piles along the pavement direction;
grouting the steel pipe pile;
an anchor cable hole, a mortar anchor rod and a side slope drainage hole II are formed in the slope surface of the side slope, and a prestressed anchor cable is arranged in the anchor cable hole;
pouring a capping beam, an anchor plate and a lattice beam, wherein the capping beam, the anchor plate and the lattice beam are connected to form a whole;
and grouting, tensioning and locking the prestressed anchor cable.
The invention has the beneficial effects that: the flexible treatment structure for the slope collapse high slope adopted by the invention has the advantages that the treatment difficulty is reduced, the construction progress is accelerated, the adaptive deformation capability of the structure is improved, and the environmental pollution is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
Fig. 2 is a schematic structural view of the steel pipe pile in the embodiment.
FIG. 3 is a schematic cross-sectional view of a steel pipe pile according to an embodiment.
Detailed Description
As shown in fig. 1, the present embodiment is a collapse slope flexible processing structure for a high slope, which has side slopes 8 excavated from top to bottom in stages, and a berm 11 is provided corresponding to each stage of side slope 8.
In the embodiment, a plurality of steel pipe piles 1 are arranged along the pavement 11, the lower ends of the steel pipe piles 1 penetrate through the stratum unconformity boundary line 12, and the upper ends of the steel pipe piles 1 are exposed out of the pavement 11. And a capping beam 2 combined with the steel pipe pile 1 is poured on the berm 11, a lattice beam 4 is arranged on the slope surface of the side slope 8, and the lower part of the lattice beam 4 is connected with the capping beam 2 on the berm 11 below through an anchor plate 3.
In this example, a drain hole I9 is reserved on the anchor plate 3 corresponding to the side slope 8. The anchor plate 3 is fixed on a side slope 8 through a plurality of prestressed anchor cables 5, the prestressed anchor cables 5 are arranged on the central line of the anchor plate 3, the length is arranged at intervals, and the length of each anchor cable can be adjusted according to the actual thickness of a covering layer on site. The lattice beam 4 is arranged on the excavation side slope 8 above the anchor pulling plate 3, the anchor pulling plate 3 is poured with the lattice beam 4 as a bottom beam of the lattice beam 4 to form a whole, and a mortar anchor rod 7 is arranged at the node of the lattice beam 4 in a system mode.
The construction method of the embodiment is as follows:
a. and excavating from top to bottom in stages, excavating each stage of side slope 8 to the designed slope ratio of 1: i, and protecting one stage after excavating one stage.
b. Two rows of steel pipe piles 1 are arranged along the direction of a packway 11, the distance is 0.6m, the row distance is 0.5m, the steel pipe piles are arranged in a quincunx shape, the lower ends of the steel pipe piles penetrate through a stratum unconformity boundary line 12, and the rock penetration depth is not less than 1/3 pile lengths. The steel pipe pile 1 is divided into two-sequence pile jumping construction to avoid mutual influence of adjacent hole sites, and pipe following drilling is adopted to prevent collapse in the hole.
As shown in figures 2 and 3, the steel pipe pile 1 is provided with a steel pipe with an outer diameter phi of 108mm and a wall thickness of 4.5mm, 4 grouting holes 16 are drilled in the steel pipe along the length direction of the steel pipe, the distance between the grouting holes is 0.5m, the diameter phi of the steel pipe is 20mm, the grouting holes are arranged in a quincunx manner, the holes are distributed at a distance of 0.5m from the bottom of the steel pipe, and 1 bundle of grouting holes is placed in the steel pipe pile
12m anchor bar bundles 13 and 1 grouting pipe 14 with the diameter of 20 mm.
c. The steel pipe pile 1 adopts a hole bottom slurry return method for grouting, a 10cm deep gap 17 is reserved between a steel pipe and the bottom of a pile hole, grouting is performed first on the dilute side and then on the concentrated side, the water cement ratio is adjusted according to the slurry absorption amount, and finally, the hole is sealed by using concentrated slurry, so that the grouting is compact, and the plugging length can be adjusted according to the actual pressure. The grouting material adopts M30 cement mortar 15 (the ratio of lime to sand is 1:1), the water-cement ratio is 0.38-0.45, the grouting pressure is 0.3-0.5 MPa, the screen grouting pressure is 0.5MPa, and the pressure is stabilized for 5-10 min.
d. Anchor cable holes 6 of the prestressed anchor cables 5, mortar anchor rods 7 and side slope drain holes II10 are arranged on the slope surface. In order to prevent the holes from collapsing, the anchor cable holes 6 are drilled by following pipes; mortar anchor rods 7 are arranged at the nodes of the frame beams 4,
(L is 9m/6m), and the direction of the anchor rod is vertical to the slope surface; cloth 1m above the horse way 11Arranging a row of side slope drainage holes II10 phi 100, wherein L is 10m @3m, penetrating out of the anchor plate 3 through a reserved drainage hole I9, excavating a slope system above the anchor plate 3 to arrange side slope drainage holes II10 phi 100, L is 10m @4m multiplied by 4m, upward inclining all the drainage holes by 10 degrees, interpolating phi 75 drainage flower pipes, and arranging reverse filtration;
e. and integrally pouring the capping beam 2 and the anchor plate 3 at the top of the steel pipe pile 1 along the direction of the berm 11, arranging a structural joint every 12m, wherein the width of the joint is 2cm, and filling asphalt boards in the joint.
And (3) pouring the lattice beams 4 on the excavation side slope 8 above the anchor pulling plate 3, pouring the anchor pulling plate 3 as a bottom beam of the lattice beams 4 and the lattice beams 4 to form a whole, arranging a structural joint at intervals of 12m on the lattice beams 4, and filling asphalt boards in the joints.
f. Grouting, tensioning and locking the prestressed anchor cable 5, performing under-tensioning on the prestressed anchor cable 5 according to 50% of designed tensioning force, and performing compensation tensioning in due time according to the condition of the tensioning force loss of the anchor cable.
Claims (10)
1. The utility model provides a collapse slope volume high slope flexible processing structure which characterized in that: the device is provided with side slopes (8) excavated from top to bottom in a grading way, and a pavement (11) is arranged corresponding to each grade of side slope (8);
a plurality of steel pipe piles (1) are arranged along the packway (11), the lower ends of the steel pipe piles (1) penetrate through a stratum unconformity boundary line (12), the upper ends of the steel pipe piles (1) are exposed out of the packway (11), a capping beam (2) combined with the steel pipe piles (1) is poured on the packway (11), a frame beam (4) is arranged on the slope surface of the side slope (8), and the lower part of the frame beam (4) is connected with the capping beam (2) on the packway (11) below through an anchor plate (3);
the anchor plate (3) is fixed on a side slope (8) through a plurality of prestressed anchor cables (5), and the lattice beam (4) is fixed on the side slope (8) through a plurality of mortar anchor rods (7).
2. The collapsing slope area high slope flexible processing structure according to claim 1, characterized in that: the steel pipe pile (1) is constructed by two-step pile jumping, pipe following drilling is adopted, and the rock-entering depth is greater than or equal to 1/3 steel pipe pile length.
3. The method of claim 1Collapse slope volume high side slope flexible processing structure, its characterized in that: the steel pipe pile (1) is drilled with 4 grouting holes (16) along the pipe length direction, the grouting holes are arranged in a quincunx manner, and 1 bundle of 3 grouting holes are placed inside the steel pipe pile
12m anchor bar bundles (13) and 1 grouting pipe (14) with the diameter of 20 mm.
4. The collapsing slope area high slope flexible processing structure according to claim 1, characterized in that: the steel pipe pile (1) is grouted by a hole bottom grout returning method, the distance between the end part of the steel pipe pile and the hole bottom of a pile hole is 10cm, grouting is performed first in a diluted mode and then in a concentrated mode, the water cement ratio is adjusted according to the grout absorption amount, finally, hole sealing is performed by using concentrated grout, the blocking length is generally 10cm, grouting materials are M30 cement mortar (15), the sand-lime ratio is 1:1, the water cement ratio is 0.38-0.45, the grouting pressure is 0.3-0.5 MPa, the grout shielding pressure is 0.5MPa, and the pressure is stabilized for 5-10 min.
5. The collapsing slope area high slope flexible processing structure according to claim 1, characterized in that: the prestressed anchor cables (5) are connected to the center line of the anchor pulling plate (3) and are arranged at intervals in length, the length is controlled within the range of 8-10 m of the anchoring-in bedrock, and the prestressed anchor cables are adjusted according to the actual thickness of a covering layer on site.
6. The collapsing slope area high slope flexible processing structure according to claim 1, characterized in that: and grouting, tensioning and locking the prestressed anchor cable (5), and tensioning the prestressed anchor cable (5) according to 50% of the designed tensioning force.
7. The collapsing slope area high slope flexible processing structure according to claim 1, characterized in that: the mortar anchor rod (7) is arranged at a node of the lattice beam (4).
8. The collapsing slope area high slope flexible processing structure according to claim 1, characterized in that: the frame beam (4), the anchor plate (3), the capping beam (2) and the steel pipe pile (1) are poured to form a whole.
9. The collapsing slope area high slope flexible processing structure according to claim 1, characterized in that: and a drain hole I (9) is reserved on the anchor pulling plate (3).
10. A construction method of the collapse slope high slope flexible processing structure according to any one of claims 1 to 9 comprises the following steps:
excavating the side slope (8) from top to bottom in a grading manner, and protecting the side slope after excavating the side slope for one grade;
arranging the steel pipe piles (1) along the direction of the packway (11);
grouting the steel pipe pile (1);
an anchor cable hole (6), a mortar anchor rod (7) and a side slope drain hole II (10) are arranged on the slope surface of the side slope (8), and a prestressed anchor cable (5) is arranged in the anchor cable hole (6);
pouring a capping beam (2), an anchor plate (3) and a lattice beam (4), wherein the capping beam (2), the anchor plate (3) and the lattice beam (4) are connected to form a whole;
and (3) grouting, tensioning and locking the prestressed anchor cable (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010015712.6A CN111042161A (en) | 2020-01-07 | 2020-01-07 | Slope collapse high slope flexible processing structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010015712.6A CN111042161A (en) | 2020-01-07 | 2020-01-07 | Slope collapse high slope flexible processing structure and construction method thereof |
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| CN111042161A true CN111042161A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010015712.6A Pending CN111042161A (en) | 2020-01-07 | 2020-01-07 | Slope collapse high slope flexible processing structure and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687361A (en) * | 2021-12-09 | 2022-07-01 | 中国铁建大桥工程局集团有限公司 | Construction method for preventing landslide of side slope at inlet of flood discharge tunnel |
| US20230009242A1 (en) * | 2021-07-09 | 2023-01-12 | Fujian Geological Engineering Survey Institute | Construction Method of Fast-setting Polymer Grouting for Rapid Control of Slope Erosion and Landslide |
-
2020
- 2020-01-07 CN CN202010015712.6A patent/CN111042161A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230009242A1 (en) * | 2021-07-09 | 2023-01-12 | Fujian Geological Engineering Survey Institute | Construction Method of Fast-setting Polymer Grouting for Rapid Control of Slope Erosion and Landslide |
| CN114687361A (en) * | 2021-12-09 | 2022-07-01 | 中国铁建大桥工程局集团有限公司 | Construction method for preventing landslide of side slope at inlet of flood discharge tunnel |
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