CN112031003A - Support device with combined action of pile and soil and construction method thereof - Google Patents
Support device with combined action of pile and soil and construction method thereof Download PDFInfo
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- CN112031003A CN112031003A CN202010938659.7A CN202010938659A CN112031003A CN 112031003 A CN112031003 A CN 112031003A CN 202010938659 A CN202010938659 A CN 202010938659A CN 112031003 A CN112031003 A CN 112031003A
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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
- 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a supporting device under combined action of pile and soil and a construction method thereof. The construction method comprises the following steps: step one, trimming a slope surface of a side slope, positioning drill holes and cleaning to ensure that two adjacent drill holes do not collapse; inserting H-shaped steel into two adjacent drill holes; striking the steel plate into the soil along the clamping grooves on the two sides of the H-shaped steel to keep the perpendicularity of the H-shaped steel and the steel plate; and step four, performing concrete pouring on the drilled holes, and curing to form the cast-in-situ bored pile to complete the construction of the supporting device. The invention considers the combined action of the piles and the soil, forms the soil arch effect through the arc-shaped steel plates and the reasonable pile spacing, utilizes the self shear strength of the soil body to resist external force, reduces the using amount of the piles, saves resources and reduces workload.
Description
Technical Field
The invention belongs to the field of slope support, and particularly relates to a support device with combined action of piles and soil and a construction method thereof.
Background
China is a multi-mountain country, a lot of natural mountain slopes exist, with the development of regional economy and the requirement of road network construction layout in recent years, more and more expressways crossing mountains and passing over the mountains are provided, and due to the fact that a large number of expressways are built, more deep-dug high-fill road sections are provided, cutting slopes are unavoidable, and therefore the slope problem is quite prominent.
Most of the existing supporting forms of piling piles into the side slope only consider the anti-slip effect of the piles on the soil, but do not consider the control effect of the self shear strength of the soil body on the landslide, so that the safety reserve is overlarge, the resource waste or the supporting effect is poor, and the potential safety hazard exists.
The chinese patent with application number 201910347657.8 discloses a supporting structure and a construction method thereof, wherein a first supporting pile and a second supporting pile are respectively provided with a connecting piece with a clamping part, and every two supporting piles are connected into a whole through the clamping part. But the problems are that: the distance between every two supporting piles is too small, so that the safety storage is too large, the soil arch effect cannot be formed, the self shear strength of the upper soil body cannot be utilized, and the resource waste is caused. Chinese patent application No. 201920468303.4 discloses a retaining wall that construction is convenient, and the steel pile inserts the soil body perpendicularly, inserts the fender apron perpendicularly between two steel piles, supports with the stock behind the steel pile and prevents the slope, but the problem lies in: soil retaining plate and steel pile all do not have the hole of permeating water, when meetting rainfall weather, and upper portion soil normal water can't be discharged, leads to the soil body serious enlargement, and weight increases thereupon, has increaseed the risk of landslide.
Generally speaking, the existing slope support mode of piling in the soil body relies on more past experiences to carry out construction design, and although the control on the slope landslide trend of the slope body can be effectively played, the waste is caused to resources, and the advantage of the soil body cannot be utilized.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention aims to provide a safe, reliable and strong-stability supporting device under the combined action of piles and soil.
The technical scheme is as follows: the invention relates to a supporting device under combined action of pile soil, which comprises a cast-in-situ bored pile and a steel plate, wherein the cast-in-situ bored pile and the steel plate are mutually connected, H-shaped steel is arranged in the cast-in-situ bored pile, a through hole is formed in the steel plate, and the bottom surfaces of the cast-in-situ bored pile and the steel plate are lower than a slip crack surface of a side slope.
The steel plate is a circular arc steel plate. The arc surface of the steel plate faces to one side of the slope with the height reduced, and the steel plate is perpendicular to the ground plane. The surface of the steel plate is provided with an anticorrosive coating layer. The steel sheet rigidity is great, and self can keep out certain upper portion gliding force to can transmit the gliding force that receives to both ends drilling bored concrete pile body, convert horizontal thrust into, make the drilling bored concrete pile still receive the horizontal pressure that comes from both sides arc steel sheet except receiving the confining pressure effect that the soil body produced on every side, nevertheless because of the existence of the inside H shaped steel of pile body, drilling bored concrete pile shear strength is great, is difficult for producing the destruction.
The side of H shaped steel sets up the inclined draw-in groove to the steel sheet inserts perpendicularly in the soil body along the draw-in groove. The clamping groove is in lap joint with the part of the steel plate extending into the cast-in-situ bored pile. The steel plate, the clamping groove and the cast-in-situ bored pile are bonded and fixed together through concrete, and the whole supporting form is integrated, so that uneven settlement and deformation can be effectively reduced.
The through hole is circular, oval or any polygon, preferably circular. The through holes are uniformly arranged on the steel plate at intervals. When meeting rainfall weather, moisture in the upper portion soil body can flow to in the drainage ditch of slope body lower part through the circular through-hole of steel sheet, be unlikely to because of ponding in the upper portion soil body, the dead weight grow, increase the gliding force under the slope body, cause the harm to the form of strutting, produce landslide harm even.
The length of the cast-in-situ bored pile is the same as the embedding depth of the arc-shaped steel plate, and the cast-in-situ bored pile is designed and manufactured according to the actual requirements of the side slope. The distance between the bored piles is determined according to the prior art specifications so as to ensure the formation of the soil arch effect, and the radian of the steel plate is manufactured according to the actual requirement and the reasonable arch axis form.
The construction method of the supporting device under the combined action of the pile and the soil comprises the following steps:
step one, trimming a slope surface of a side slope, positioning and cleaning spiral drill holes by using a drilling machine, taking out soil in the drill holes in the lifting process, and ensuring that two adjacent drill holes do not collapse;
inserting H-shaped steel into two adjacent drill holes;
thirdly, driving the steel plate into the soil along the clamping grooves on the two sides of the H-shaped steel, wherein the perpendicularity of the H-shaped steel and the steel plate is kept in the driving process;
and step four, performing concrete pouring on the drilled holes, and curing to form the cast-in-situ bored pile to complete the construction of the supporting device.
The working principle is as follows: the circular arc-shaped steel plate and the H-shaped steel are preliminarily connected through the clamping groove, the circular arc-shaped steel plate and the H-shaped steel can be guaranteed to be located on the same vertical plane, and under the bonding effect of concrete, the whole supporting structure forms a whole, the uneven settlement deformation of the supporting structure is effectively reduced, and the downward sliding force of a side slope is mainly borne by three parts. First, the circular arc steel plate has high rigidity and strength, and can directly bear a part of the downward sliding force. Secondly, under the effect of reasonable arch axis, the circular arc steel plate can transmit a part of force to the two sides of the pile body of the bored pile through the cross section to form horizontal thrust, namely, the pile body is under the confining pressure action of the surrounding soil body and the pressure brought by the arc steel plates at the two sides, but under the effect of H-shaped steel in the pile, the shear strength of the pile body is high, the phenomenon of pressure damage can not be caused basically, and the pile body is not easy to incline due to the direction conversion of the force. Finally, due to the existence of the arc-shaped steel plates and the reasonable space between the cast-in-place bored piles, the baffle and the soil body before the cast-in-place bored piles can generate uneven displacement and deformation, the phenomenon of 'wedging' is generated, the 'soil arch effect' is formed, the stress transmission and the adjustment of the soil body are facilitated, and the self shear strength is exerted to resist the external force. The round hole on the arc-shaped steel plate can be favorable to surplus water in the soil on the upper portion to flow to the slope bottom drainage ditch in time, and especially in plum rain season, the phenomenon that the upper portion is dead-weight and large and the gliding force is increased due to the fact that the accumulated water on the soil on the upper portion is too much and cannot be discharged in time is avoided, so that the supporting structure is damaged and serious landslide hazard is even caused.
Compared with the prior art, the invention has the following remarkable characteristics:
1. the combined action of pile and soil is considered, the 'soil arch effect' is formed by the arc-shaped steel plates and the reasonable space between the bored piles, the self shear strength of the soil body is utilized to resist external force, the using amount of the bored piles is reduced, resources are saved, and workload is reduced;
2. the H-shaped steel is inserted into the cast-in-situ bored pile, so that the shear strength of the cast-in-situ bored pile can be improved, the cast-in-situ bored pile can bear the pressure from the arc-shaped steel plates on two sides, and the clamping grooves of the two sections of the H-shaped steel are connected with the steel plates and can be used for inserting and positioning the arc-shaped steel plates;
3. the through holes are formed in the surface of the arc-shaped steel plate, so that accumulated water in upper soil can flow into drainage ditches at the lower part of the slope in time, the self weight of the upper soil can be reduced, the downward sliding force can be reduced, and the landslide risk of the side slope can be reduced;
4. the arc-shaped steel plate and the H-shaped steel are connected together under the bonding action of concrete, and the supporting structure forms a whole body, so that the stability of the supporting structure can be improved, and the uneven settlement deformation generated on the local part of the supporting structure can be reduced;
5. the surface of the circular arc-shaped steel plate is coated with an anticorrosive material, and the circular arc-shaped steel plate is buried in a slope body and cannot be easily corroded by external environmental factors, so that the service life can be prolonged, and the safety and stability of the supporting structure are ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing the overlapping of the steel sheet 2 and the H-section 3 according to the present invention;
FIG. 3 is a perspective view of a steel plate 2 of the present invention;
FIG. 4 is a perspective view of an H-shaped steel 3 of the present invention;
FIG. 5 is a plan view of the H-shaped steel 3 of the present invention.
Detailed Description
The directions shown in the drawings of the specification are up, down, left and right.
As shown in fig. 1-2, the supporting device under the combined action of the pile and the soil comprises a cast-in-situ bored pile 1 and a steel plate 2, wherein H-shaped steel 3 is inserted into the cast-in-situ bored pile 1, and the steel plate 2 is an arc-shaped steel plate 2 which conforms to the radian of a reasonable arch axis of actual engineering. According to actual needs, a certain number of supporting devices are arranged on the slope surface of the side slope according to needs.
As shown in fig. 3, the surface of the circular arc steel plate 2 is provided with a through hole 21, and the through hole 21 is circular, oval or any polygon, preferably circular, which is beneficial for soil drainage. The surface of the circular arc-shaped steel plate 2 is provided with an anticorrosive coating layer, and the anticorrosive coating is the prior one. The bottom surfaces of the cast-in-situ bored pile 1 and the steel plate 2 are lower than the slip crack surface of the side slope.
As shown in FIGS. 4-5, clamping grooves 31 matched with the radian of the circular arc-shaped steel plate 2 are welded on two sides of the H-shaped steel 3, so that the circular arc-shaped steel plate 2 is connected with the H-shaped steel 3 and vertically driven into the soil. The two ends of the circular arc-shaped steel plate 2 are clamped into the clamping grooves 31 and hit into the soil along the direction of the clamping grooves 31, and the perpendicularity of the steel plate 2 and the H-shaped steel 3 is guaranteed constantly in the hitting process.
When the upper part of the slope body slips down, one part of force can be directly borne by the strength of the steel plate 2, the other part of force is transmitted to the pile body of the cast-in-situ bored pile 1 through the reasonable arch axis of the steel plate 2, and is converted into horizontal thrust, so that the supporting device cannot be inclined towards the lower side of the slope body, the pile body of the cast-in-situ bored pile 1 is subjected to the confining pressure action of the surrounding soil body and the horizontal pressure action transmitted by the steel plates 2 on the two sides, H-shaped steel 3 is inserted into the pile body of the cast-in-situ bored pile 1, the stressed cast-in-situ bored pile 1 has enough shear strength to resist external force and cannot be damaged, finally, due to the supporting and blocking action of the steel plate 2, the upper soil body is unevenly deformed, the ' wedging ' phenomenon is generated, the ' soil arch effect ' is formed '. When water in the upper soil body is excessively large to form accumulated water or meet rainfall weather, redundant accumulated water can flow to the slope bottom drainage ditch through the through holes 21 on the surface of the steel plate 2, and the landslide possibility cannot be increased due to the fact that the accumulated water increases the downward sliding force. As the cast-in-situ bored pile 1 and the steel plate 2 are connected together through the concrete bonding effect, the supporting device forms a whole body and has a synergistic effect, thereby not only improving the safety capability of a supporting slope body, but also effectively reducing the local uneven settlement of the supporting device and reducing the possibility of the whole damage of the supporting device caused by partial uneven settlement.
The construction method of the support form under the combined action of the pile and the soil comprises the following steps:
(1) trimming a soil slope surface, positioning a drilling machine, spirally drilling, taking out a soil body part in a drill hole in the lifting process, cleaning the drill hole, and ensuring that the drill hole does not collapse;
(2) in two adjacent drilled holes formed, inserting the H-shaped steel 3 in the center;
(3) the steel plate 2 coated with the anticorrosive paint is driven into the soil along the clamping grooves 31 on the two sides of the H-shaped steel 3 between two adjacent drill holes, and the perpendicularity of the H-shaped steel 3 and the steel plate 2 needs to be kept constantly in the driving process;
(4) and (5) performing concrete pouring on the drilled holes, and curing to form the cast-in-situ bored pile 1, so that construction is completed.
Claims (10)
1. The utility model provides a stake soil combined action's supporting device which characterized in that: the cast-in-situ bored concrete pile comprises a cast-in-situ bored pile (1) and a steel plate (2) which are connected with each other, wherein H-shaped steel (3) is arranged in the cast-in-situ bored pile (1), a through hole (21) is formed in the steel plate (2), and the bottom surfaces of the cast-in-situ bored pile (1) and the steel plate (2) are lower than a slip crack surface of a side slope.
2. The pile-soil co-acting support device of claim 1, wherein: the steel plate (2) is an arc steel plate.
3. The pile-soil co-acting support device of claim 2, wherein: the arc surface of the steel plate (2) faces to one side of the slope, the height of the slope is reduced, and the steel plate (2) is perpendicular to the ground plane.
4. The pile-soil co-acting support device of claim 2, wherein: and an anticorrosive coating layer is arranged on the surface of the steel plate (2).
5. The pile-soil co-acting support device of claim 1, wherein: and a clamping groove (31) is formed in the side surface of the H-shaped steel (3).
6. The pile-soil co-acting support device of claim 5, wherein: the clamping groove (31) is in lap joint with the part, extending into the cast-in-situ bored pile (1), of the steel plate (2).
7. The pile-soil co-acting support device of claim 5, wherein: the steel plate (2) is bonded with the clamping groove (31) and the cast-in-situ bored pile (1) through concrete.
8. The pile-soil co-acting support device of claim 1, wherein: the through hole (21) is circular, oval or any polygon.
9. The pile-soil co-acting support device of claim 1, wherein: the through holes (21) are uniformly arranged on the steel plate (2) at intervals.
10. A method of constructing a pile-soil co-acting support means according to any one of claims 1 to 9, including the steps of:
step one, trimming a slope surface of a side slope, positioning drill holes and cleaning to ensure that two adjacent drill holes do not collapse;
step two, inserting H-shaped steel (3) into two adjacent drill holes;
thirdly, driving the steel plate (2) into the soil along the clamping grooves (31) on the two sides of the H-shaped steel (3), and keeping the verticality of the H-shaped steel (3) and the steel plate (2) in the driving process;
and step four, performing concrete pouring on the drilled holes, and curing to form the cast-in-situ bored pile (1) so as to complete the construction of the supporting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938659.7A CN112031003A (en) | 2020-09-09 | 2020-09-09 | Support device with combined action of pile and soil and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938659.7A CN112031003A (en) | 2020-09-09 | 2020-09-09 | Support device with combined action of pile and soil and construction method thereof |
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| Publication Number | Publication Date |
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| CN112031003A true CN112031003A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010938659.7A Pending CN112031003A (en) | 2020-09-09 | 2020-09-09 | Support device with combined action of pile and soil and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550266A (en) * | 2021-08-24 | 2021-10-26 | 中印恒盛(北京)贸易有限公司 | Novel river course bank protection steel wall |
| US11891770B2 (en) | 2021-04-12 | 2024-02-06 | Cmi Limited Co. | Catenary panel retaining wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290848A (en) * | 2013-06-20 | 2013-09-11 | 江苏城市职业学院 | Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof |
| CN108914963A (en) * | 2018-08-21 | 2018-11-30 | 上海勘测设计研究院有限公司 | Assembled arcading barricade |
| KR20200053891A (en) * | 2018-11-09 | 2020-05-19 | 토우산업 주식회사 | One-sided Camber-type Composite File for Retaining Wall and Method for manufacturing this same and Method for constructing Retaining Wall using this same |
| CN111456081A (en) * | 2020-03-16 | 2020-07-28 | 中国电建集团华东勘测设计研究院有限公司 | Pile foundation retaining wall structure and construction method |
-
2020
- 2020-09-09 CN CN202010938659.7A patent/CN112031003A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290848A (en) * | 2013-06-20 | 2013-09-11 | 江苏城市职业学院 | Large diameter arc-shaped steel sheet pile combined foundation pit retaining structure and construction method thereof |
| CN108914963A (en) * | 2018-08-21 | 2018-11-30 | 上海勘测设计研究院有限公司 | Assembled arcading barricade |
| KR20200053891A (en) * | 2018-11-09 | 2020-05-19 | 토우산업 주식회사 | One-sided Camber-type Composite File for Retaining Wall and Method for manufacturing this same and Method for constructing Retaining Wall using this same |
| CN111456081A (en) * | 2020-03-16 | 2020-07-28 | 中国电建集团华东勘测设计研究院有限公司 | Pile foundation retaining wall structure and construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11891770B2 (en) | 2021-04-12 | 2024-02-06 | Cmi Limited Co. | Catenary panel retaining wall |
| CN113550266A (en) * | 2021-08-24 | 2021-10-26 | 中印恒盛(北京)贸易有限公司 | Novel river course bank protection steel wall |
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Application publication date: 20201204 |