CN211898463U - Reinforcing device combining micro-steel pipe pile and anchor rod - Google Patents
Reinforcing device combining micro-steel pipe pile and anchor rod Download PDFInfo
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- CN211898463U CN211898463U CN202020363736.6U CN202020363736U CN211898463U CN 211898463 U CN211898463 U CN 211898463U CN 202020363736 U CN202020363736 U CN 202020363736U CN 211898463 U CN211898463 U CN 211898463U
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- steel pipe
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- pipe pile
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Abstract
The utility model discloses an adopt reinforcing apparatus that little steel tubular pile and stock are united, include: the miniature steel pipe pile, the anchor rod and the concrete connecting layer are arranged on the concrete connecting layer; the miniature steel pipe piles are vertically inserted into the slope body to the bearing layer, the top ends of the miniature steel pipe piles are connected with the crown beams, the crown beams are connected through the connecting beams, and concrete is poured on a frame formed by the crown beams and the connecting beams to form a concrete connecting layer; the lower end of the anchor rod is obliquely anchored into the bearing layer of the slope body, and the upper end of the anchor rod is fixed on the concrete connecting layer. Through the technical scheme of the utility model, to the landslide body that landslide size is less relatively and have firm holding power layer geological conditions, effectively administer the landslide disease on the basis that destroys the disturbance little to the environment.
Description
Technical Field
The utility model relates to a highway engineering technical field especially relates to an adopt reinforcing apparatus that little steel pipe pile and stock are united.
Background
In highway engineering practice, side slope collapse and landslide are common diseases due to factors such as engineering activities, topographic conditions, rainfall and the like. The damage of the diseases is high, and the treatment technology is high in demand, so that the method is a great challenge to engineering and scientific research personnel. In the practical process, according to the concrete construction working conditions, lithological characteristics and other comprehensive factors of a landslide body, the common landslide control modes mainly comprise a plurality of single modes or combined modes of slope cutting and load reduction, back pressure backfill and anti-slide pile or retaining wall supporting, but all the modes have respective adaptive conditions. For a slope body with relatively small landslide volume and firm bearing stratum geological conditions, the adopted anti-slide pile or large gravity type retaining wall has high cost, poor environmental adaptability and large disturbance on environment.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists in the above-mentioned problem, the utility model provides an adopt reinforcing apparatus that little steel pipe pile and stock are united, to the landslide volume less relatively and have the slope body of firm holding force layer geological conditions, go deep into geology holding force layer through miniature steel-pipe pile, and set up the concrete linkage at miniature steel-pipe pile top, set up the stock behind the concrete linkage and go deep into holding force layer, guarantee the wholeness ability of standing firmly and increasing the linkage of every stake, effectively administer the landslide disease on the basis that disturbs mobility to the environment and is little.
In order to achieve the above object, the utility model provides an adopt reinforcing apparatus that little steel pipe pile and stock are united, include: the miniature steel pipe pile, the anchor rod and the concrete connecting layer are arranged on the concrete connecting layer; the miniature steel pipe pile is vertically inserted into a slope body to a bearing layer, the top end of the miniature steel pipe pile is connected with crown beams, the crown beams are connected through connecting beams, and concrete is poured on a frame formed by the crown beams and the connecting beams to form the concrete connecting layer; the lower end of the anchor rod is obliquely anchored into the bearing layer of the slope body, and the upper end of the anchor rod is fixed on the concrete connecting layer.
In the above technical scheme, preferably, the miniature steel pipe pile is internally hot-rolled with a seamless steel pipe, a sediment section is reserved at the bottom in the miniature steel pipe pile, a perforated pipe is formed at the lower part of the seamless steel pipe according to a hole reserved at 4 meshes/meter, and the top of the miniature steel pipe pile extends into the concrete connection layer and is not less than 30 cm.
In the above technical scheme, preferably, cement mortar is injected between the micro steel pipe pile and the seamless steel pipe, the water cement ratio is 0.45:1, and the grouting pressure is 0.3-0.5 MPa.
In the above technical solution, preferably, the micro steel pipe pile may be formed by connecting steel pipes through a sleeve, and a wall thickness of the sleeve is not less than 10 mm.
In the above technical scheme, preferably, the anchor rod body extends into a pre-drilled anchor rod hole, cement mortar is poured into the anchor rod hole, the anchor head section of the anchor rod is threaded and fixed on the crown beam by a nut, and the anchor head end of the anchor rod is sealed by concrete.
In the above technical solution, preferably, M30 cement mortar is used for pouring in the anchor rod hole, and is filled with an expanding agent, and the anchor head end is sealed by C25 concrete.
In the above technical solution, preferably, an inclination angle of the anchor rods with respect to the horizontal direction is 25 °, and an arrangement interval of the anchor rods is 5 meters.
In the above technical solution, preferably, the concrete connection layer is provided with a reinforced concrete frame beam, the reinforced concrete frame beam is composed of vertical ribs and cross beams, and the reinforced concrete frame beam is formed by arranging a steel reinforcement framework inside and pouring concrete on site outside.
In the above technical solution, preferably, a group of centering brackets is fixed on the anchor rod body every 3 meters.
In the above technical solution, preferably, the thickness of the protective layer formed by the cement mortar poured in the anchor rod hole is not less than 25 mm.
Compared with the prior art, the beneficial effects of the utility model are that: go deep into geological bearing layer through miniature steel-pipe pile to set up the concrete linkage at miniature steel-pipe pile top, set up the stock behind the concrete linkage and go deep into bearing layer, guarantee upright firm and increase the wholeness ability of linkage of every steel-pipe pile, effectively administered the landslide disease on the basis that is little to the environmental destruction disturbance.
Drawings
Fig. 1 is a schematic longitudinal cutting structure diagram of a reinforcing device using a micro steel pipe pile and an anchor rod in combination according to an embodiment of the present invention;
fig. 2 is a schematic plane layout structure of a reinforcing apparatus using a micro steel pipe pile and an anchor rod in combination according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a micro steel pipe pile according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a bushing according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a bolt according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a concrete anchor according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a section reinforcement of a crown beam and a connection beam according to an embodiment of the present invention.
In the drawings, the correspondence between each component and the reference numeral is:
1. the steel pipe pile comprises a miniature steel pipe pile body, 11 seamless steel pipes, 12 sleeves, 2 anchor rods, 21 concrete seal anchors, 22 centering supports, 3 concrete connecting layers, 31 crown beams and 32 connecting beams.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2, according to the utility model provides an adopt reinforcing apparatus that little steel pipe pile and stock are united, include: the steel pipe pile comprises a miniature steel pipe pile 1, an anchor rod 2 and a concrete connecting layer 3; the miniature steel pipe pile 1 is vertically inserted into a slope body to a bearing stratum, the top end of the miniature steel pipe pile 1 is connected with the top beams 31, the top beams 31 are connected through the connecting beams 32, and concrete is poured on a frame formed by the top beams 31 and the connecting beams 32 to form a concrete connecting layer 3; the lower end of the anchor rod 2 is obliquely anchored into the bearing layer of the slope body, and the upper end of the anchor rod 2 is fixed on the concrete connecting layer 3.
As shown in fig. 3, in this embodiment, a micro steel pipe pile 1 is provided on a side slope platform for reinforcing a landslide body behind the platform. And calculating according to the geological survey result, and determining parameters such as appropriate pile spacing, row spacing, pile length and the like. The steel pipe pile should go deep into the bearing stratum. Preferably, the steel pipe pile plane is arranged in a quincunx shape, the seamless steel pipe 11 is hot rolled in the miniature steel pipe pile 1, a sediment section is reserved at the bottom in the miniature steel pipe pile 1, a perforated pipe is formed at the lower part of the seamless steel pipe 11 according to a hole with a diameter of 12mm reserved at 4 meshes/meter, the top of the miniature steel pipe pile 1 extends into the concrete connection layer 3 to be not less than 30 cm, the pile top is connected with the crown beam 31 and the connection beam 32, the width and the height of the crown beam 31 and the connection beam 32 are 0.3m and 0.3m, and the strength grade is C25. Preferably, cement mortar is injected between the miniature steel pipe pile 1 and the seamless steel pipe 11, the water cement ratio is 0.45:1, and the grouting pressure is 0.3-0.5 MPa.
In the above embodiment, as shown in fig. 4, preferably, the micro steel pipe pile 1 may be formed by connecting steel pipes through a sleeve 12, and the thickness of the sleeve 12 is not less than 10 mm. The joints of the steel pipes are preferably staggered, and the joints on the same section are ensured not to be more than 50%.
As shown in fig. 5, in the above embodiment, in order to further enhance the stability and retaining capability of the reinforcing apparatus, the cantilever stress state of the micro steel-pipe pile 1 is changed by an anchoring method, so that the bending resistance of the micro steel-pipe pile 1 is improved, and the advantage of the micro steel-pipe pile 1 that the shearing resistance is large is exerted. Preferably, the rod body of the anchor rod 2 extends into a pre-drilled hole of the anchor rod 2, cement mortar is poured into the hole of the anchor rod 2, the anchor head section of the anchor rod 2 is processed with threads and is fixed on the crown beam 31 by nuts, and the anchor head end of the anchor rod 2 is sealed by concrete 21. Specifically, anchor rods 2 are arranged between the miniature steel pipe piles 1 on the side of the backer, the diameter of a formed hole of an anchor rod hole is phi 90, the diameter of a rod body of each anchor rod 2 is phi 32, and the axial tension design load of each anchor rod 2 is determined according to stress calculation and is totally arranged in 1 row. The length of the anchor rod 2 goes deep into the bearing layer, and the specific length is determined according to stress calculation and working conditions. As shown in fig. 6, the anchor head end is preferably sealed in situ with C25 concrete, which may have the same strength grade as the crown beam 31, and the concrete seal 21 is used to protect the inner anchor rod 2 from external rain and the like. Preferably, the inclination angle of the anchor rods 2 to the horizontal direction is 25 °, and the arrangement interval of the anchor rods 2 is 5 meters.
Specifically, the anchor rod body is installed in time after the anchor rod hole is drilled, the anchor head section anchor rod is processed into threads and is fastened by nuts, the threads adopt standard thread pitches, and the nuts adopt M30. The anchor rod grouting adopts M30 cement mortar, when grout in the hole is initially set, secondary grout filling is carried out in time to ensure that the grout is full, and a proper amount of expanding agent is added into the grout.
In the above embodiment, preferably, a reinforced concrete frame beam is arranged on the concrete connecting layer 3, the reinforced concrete frame beam is composed of vertical ribs and cross beams, and the reinforced concrete frame beam is formed by arranging a steel reinforcement framework inside and pouring concrete on site outside. The concrete grade can adopt C25 cast-in-place concrete. The size of the interface between the crown beam 31 and the connection beam 32 is the same, the size and the design strength requirement of the micro steel pipe pile are considered in the specific size, as shown in fig. 7, the crown beam 31 and the connection beam 32 are arranged with steel bars, and the arrangement of the limb bars and the erection steel bars should meet the corresponding specification of the reinforced concrete.
In the above embodiment, preferably, a group of centering brackets 22 is fixed on the rod body of the anchor rod 2 every 3 meters.
In the above embodiment, it is preferable that the protective layer formed by the cement mortar poured in the anchor rod hole has a thickness of not less than 25 mm.
According to the reinforcing device provided by the embodiment and adopting the micro steel pipe pile and the anchor rod in a combined mode, the whole construction sequence is as follows: the method comprises the following steps of 1 micro steel pipe pile, construction of a concrete crown beam 31 and a connecting beam 32, construction of an anchor rod 2, anchor head sealing and slope surface finishing.
The method specifically comprises the following steps:
(1) miniature steel pipe pile 1
1) The overall construction process of the miniature steel pipe pile 1 is as follows: the method comprises the steps of measuring and paying off, arranging grouting hole positions, drilling, inserting steel pipes and grouting, wherein construction organization is required to be strengthened, construction progress is accelerated, the steel pipes are required to be immediately placed and grouted after the drilling is finished, and disturbance to a side slope is reduced.
2) The arrangement range of the micropiles is determined according to the coordinates of the control points of the plan view, and lofting is carried out according to the intervals. The slope rate along the slope surface is leveled according to the change of the terrain so as to ensure the attractiveness of the whole project.
3) During drilling, dry drilling is adopted in the loose covering layer, and a proper amount of water can be added into the rock stratum so as to ensure that the slope stability condition and the grouting effect are not deteriorated, prevent hole collapse or hole blockage and drill a hole while drilling a steel pipe.
(2) Construction of concrete crown beam 31 and connecting beam 32
The construction is carried out according to the working procedures of paying off, foundation excavation, tamping, floating slurry chiseling, formwork support, pouring, maintenance and the like.
1) Digging and tamping foundation
Before excavation, an excavation line of the foundation is accurately determined, excavation is carried out strictly according to the excavation line, the foundation can be excavated manually, and excavated earth and stone are loaded into a trolley or a dump truck and transported to an abandoned earth place. During excavation, measurement and paying-off personnel should strictly control elevation and forbid over excavation. And (4) manually tamping the substrate after excavation, and entering the next procedure for construction after acceptance inspection is qualified.
2) Floating slurry chisel
In the grouting process, the strength of the pile head part is poor, and the pile head part needs to be chiseled.
3) And (3) formwork support: the template can be manufactured on the construction site according to a construction drawing, and a bamboo plywood is suggested to be used as an exposed surface, so that the template is required to be smooth and flat in surface, correct in shape and size and sufficient in strength and rigidity. In order to facilitate the removal of the formwork and the cleanness and smoothness of the concrete surface, a release agent is coated on the formwork. The exposed surface concrete template should use the same variety of release agent.
4) Pouring concrete: before concrete is poured, the concrete is fully rechecked, the sundries and accumulated water in the template are confirmed to be cleaned up, and then the concrete is poured. After each vibration is finished, the vibrating rod is lifted out slowly while vibrating, and the vibrating rod is prevented from colliding with a template, a steel pipe and other embedded parts. The beam body should set up 1 expansion joint every 10m, and the concrete should be poured once between every section and is moulded, avoids appearing horizontal construction joint. And (5) watering and maintaining after pouring. And reserving a hole at the position provided with the anchor rod 2, wherein the inclination angle of the hole is consistent with the designed horizontal inclination angle of the anchor rod 2.
5) Demolding: demoulding after the strength reaches 75 percent.
(3) Construction of anchor rod 2
1) According to the requirements of design files, the positions of anchor points are accurately determined, and the positioning precision is as follows: longitudinal and transverse directions are +/-50 mm. The drilling requires dry drilling, and water drilling is forbidden, so that the construction of the anchor rod 2 is ensured not to deteriorate the engineering geological condition of the slope rock mass and ensure the bonding property of the hole wall. The drilling speed is strictly controlled according to the performance of the drilling machine and the anchoring stratum, and the drilling hole is prevented from being twisted and reduced, so that the anchoring difficulty or other accidents are avoided.
2) And after the drilling reaches the designed depth, the drilling can not be stopped immediately, the stable drilling is required for 1-2 minutes, and the dust deposition at the bottom of the hole is prevented, so that the designed hole diameter can not be reached. The hole wall of the drilled hole cannot be adhered by sediment and water, the drilled hole must be cleaned, and after the drilling is finished, high-pressure air (wind pressure of 0.2-0.4 MPa) is used for completely removing rock powder and water in the drilled hole out of the drilled hole, so that the bonding strength of cement mortar and the rock-soil body on the hole wall is prevented from being reduced. Except for the relatively hard and complete rock anchoring, high-pressure water washing is not required.
3) The rod body adopts phi 32 twisted steel, a group of centering brackets 22 are arranged every 3m along the axial direction of the anchor rod 2, and the thickness of the protective layer of the anchor rod 2 is not less than 25 mm. The corrosion prevention of the anchor bar tail end is treated by adopting corrosion prevention measures such as paint brushing, oil coating and the like.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an adopt reinforcing apparatus that little steel pipe pile and stock are united for consolidate the slope body and prevent the landslide, its characterized in that includes: the miniature steel pipe pile, the anchor rod and the concrete connecting layer are arranged on the concrete connecting layer;
the miniature steel pipe pile is vertically inserted into a slope body to a bearing layer, the top end of the miniature steel pipe pile is connected with crown beams, the crown beams are connected through connecting beams, and concrete is poured on a frame formed by the crown beams and the connecting beams to form the concrete connecting layer;
the lower end of the anchor rod is obliquely anchored into the bearing layer of the slope body, and the upper end of the anchor rod is fixed on the concrete connecting layer.
2. The reinforcing device adopting the micro steel pipe pile and the anchor rod in a combined manner according to claim 1, wherein a seamless steel pipe is hot-rolled in the micro steel pipe pile, a sediment section is reserved at the bottom in the micro steel pipe pile, a flower tube is formed at the lower part of the seamless steel pipe according to a hole reserved by 4 meshes/meter, and the top of the micro steel pipe pile extends into the concrete connecting layer and is not less than 30 cm.
3. The reinforcing device adopting the micro steel pipe pile and anchor rod combination as claimed in claim 2, wherein cement mortar is injected between the micro steel pipe pile and the seamless steel pipe, the water cement ratio is 0.45:1, and the grouting pressure is 0.3-0.5 MPa.
4. The reinforcement device adopting the micro steel pipe pile and the anchor rod in combination according to any one of claims 1 to 3, wherein the micro steel pipe pile can be formed by connecting steel pipes through a sleeve, and the thickness of the wall of the sleeve is not less than 10 mm.
5. The reinforcement device adopting the combination of the micro steel pipe pile and the anchor rod as claimed in claim 1, wherein the body of the anchor rod is inserted into a pre-drilled anchor rod hole, cement mortar is poured into the anchor rod hole, the anchor head section of the anchor rod is threaded and fixed on the crown beam by a nut, and the anchor head end of the anchor rod is sealed by concrete.
6. The reinforcement device adopting the combination of the micro steel pipe pile and the anchor rod as claimed in claim 5, wherein the anchor rod hole is poured by M30 cement mortar and is filled with an expanding agent, and the anchor head end is sealed by C25 concrete.
7. The reinforcing device adopting the micro-steel pipe pile and the anchor rod in a combined mode according to claim 1 or 5, wherein the inclination angle of the anchor rod and the horizontal direction is 25 degrees, and the arrangement distance of the anchor rod is 5 meters.
8. The reinforcing device adopting the micro-steel pipe pile and anchor rod combination as claimed in claim 1, wherein a reinforced concrete frame beam is arranged on the concrete connecting layer, the reinforced concrete frame beam is composed of vertical ribs and cross beams, and the reinforced concrete frame beam is formed by internally arranging a steel reinforcement framework and externally pouring concrete in situ.
9. The reinforcement device adopting the combination of the micro-steel pipe pile and the anchor rod as claimed in claim 5, wherein a group of centering brackets is fixed on the body of the anchor rod every 3 meters.
10. The reinforcement device adopting the combination of the micro steel pipe pile and the anchor rod as claimed in claim 5, wherein the thickness of the protective layer formed by cement mortar poured in the anchor rod hole is not less than 25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020363736.6U CN211898463U (en) | 2020-03-20 | 2020-03-20 | Reinforcing device combining micro-steel pipe pile and anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020363736.6U CN211898463U (en) | 2020-03-20 | 2020-03-20 | Reinforcing device combining micro-steel pipe pile and anchor rod |
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| Publication Number | Publication Date |
|---|---|
| CN211898463U true CN211898463U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020363736.6U Expired - Fee Related CN211898463U (en) | 2020-03-20 | 2020-03-20 | Reinforcing device combining micro-steel pipe pile and anchor rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106992A (en) * | 2021-04-28 | 2021-07-13 | 西安工业大学 | Construction method of variable cross-section anchoring type micro pile |
| CN113322982A (en) * | 2021-04-28 | 2021-08-31 | 西安工业大学 | Method for managing landslide of accumulation layer |
| CN114086576A (en) * | 2021-12-02 | 2022-02-25 | 深圳市岩土综合勘察设计有限公司 | Steel pipe micro pile and construction method for reinforcing filled slope by using micro pile |
-
2020
- 2020-03-20 CN CN202020363736.6U patent/CN211898463U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106992A (en) * | 2021-04-28 | 2021-07-13 | 西安工业大学 | Construction method of variable cross-section anchoring type micro pile |
| CN113322982A (en) * | 2021-04-28 | 2021-08-31 | 西安工业大学 | Method for managing landslide of accumulation layer |
| CN114086576A (en) * | 2021-12-02 | 2022-02-25 | 深圳市岩土综合勘察设计有限公司 | Steel pipe micro pile and construction method for reinforcing filled slope by using micro pile |
| CN114086576B (en) * | 2021-12-02 | 2023-01-17 | 深圳市岩土综合勘察设计有限公司 | Steel pipe miniature pile and construction method for reinforcing filled slope by using miniature pile |
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Address after: 710075 No. 60, Gaoxin Sixth Road, high tech Zone, Xi'an, Shaanxi Patentee after: Xi'an Highway Research Institute Co.,Ltd. Address before: No.60, Gaoxin 6th Road, high tech Zone, Xi'an, Shaanxi 710000 Patentee before: XI'AN HIGHWAY INSTITUTE |
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Granted publication date: 20201110 Termination date: 20210320 |
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