CN213086823U - Variable cross-section steel reinforced cantilever supporting structure - Google Patents
Variable cross-section steel reinforced cantilever supporting structure Download PDFInfo
- Publication number
- CN213086823U CN213086823U CN202021675312.XU CN202021675312U CN213086823U CN 213086823 U CN213086823 U CN 213086823U CN 202021675312 U CN202021675312 U CN 202021675312U CN 213086823 U CN213086823 U CN 213086823U
- Authority
- CN
- China
- Prior art keywords
- section
- reinforced concrete
- concrete pile
- pile
- cantilever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The utility model discloses a variable cross-section steel reinforced cantilever supporting structure, which comprises a pile body; the pile body is composed of a steel reinforcement cage, section steel arranged in the steel reinforcement cage and a concrete body wrapping the steel reinforcement cage and the section steel in sequence. The utility model discloses changed the supporting construction mode of cross-section such as current supporting construction and wait rigidity, it has adopted the pile body of variable cross-section and the mode of built-in shaped steel to the rigidity at the different positions of reinforcing pile body, this variable cross-section shaped steel reinforcement cantilever supporting construction compares with current cross-section supporting construction such as commonly used, can effectively reduce structure geometry, reduce reinforcing bar quantity, high-efficient transmission landslide thrust under ensureing structure self safety condition.
Description
Technical Field
The utility model relates to a geotechnical engineering field, in particular to supporting construction.
Background
The bevel slope anti-landslide has very important significance, and various modes for realizing the bevel slope anti-landslide are available at present and have advantages and defects.
1. Equal-section slide-resistant pile supporting structure with circular cross section
In the current side slope and foundation pit support, the anti-slide pile support is widely applied. The cast-in-situ bored pile is in a structural form that cast-in-situ bored piles are arranged in a straight line and connected by connecting beams to resist lateral soil pressure or landslide thrust together.
The anti-slide pile is a pile-forming technology which is widely and mature in application. But the disadvantages of low lateral load resistance of the bored concrete pile row and the like prevent the wider application of the bored concrete pile row. Its disadvantages mainly include:
from the aspect of mechanical property, the circular pile is used for resisting lateral load, and has low capability of resisting bending moment under the condition of meeting the shearing resistance, and the main reason is that the circular section is not the section of a bending-resistant favorable member and generally adopts a rectangular shape, an I shape and the like; therefore, the large and giant geotechnical slope, the high cut slope and the deep foundation pit slope with huge thrust cannot meet the engineering treatment requirements at all.
From the economic perspective, because of poor bending resistance, a large amount of reinforcing steel bars need to be arranged for bending resistance, and the material is not fully utilized and is not economical.
From the perspective of safety, the deflection is large, because the diameter of the pile is not large, the slenderness ratio of the pile is large, the deflection of the cantilever type pile is large, the pulled surface of the pile is easy to crack, the service life of the pile is influenced, the durability is poor, and therefore the safety is reduced.
Due to the defects, the bored cast-in-place pile can only be applied to the conditions of side slope height, small foundation pit depth or small landslide thrust, and the application range of the bored cast-in-place pile is limited.
2. Equal-section slide-resistant pile supporting structure with rectangular cross section
The existing supporting and retaining structure for landslide and slope engineering treatment is widely applied, and is typically a rectangular anti-slide pile manually excavated. For the treatment project with large landslide thrust or gliding force, the anti-slide pile with large pile diameter is often preferred. However, this anti-slip structure has the following problems:
from the mechanical property angle, the rectangular pile is superior to the circular pile in resisting the lateral load, but the bending moment resistance of the rectangular pile is still lower, and the main reason is that the pile cantilever section resists the landslide thrust effect by the pile body strength, the resistance effect is very limited, the pile top displacement is large, and the existing building (structure) existing in the slope top of the side slope is deformed. Therefore, the large and giant geotechnical slope, the high cut slope and the deep foundation pit slope with huge thrust cannot meet the engineering treatment requirements at all.
The construction safety is poor.
When the depth of the large rectangular section slide-resistant pile is large and reaches 30-40 m, a manual hole digging process is still adopted, the pile hole is required to meet the requirement of manual hole digging, in addition, the retaining wall is wide, the pile section is large, a special pile hole supporting and wall protecting means is required for the hole pit, and serious safety accidents can be caused if the pile hole supporting and wall protecting means are not properly treated.
The construction period is long and is influenced by seasons.
The large rectangular section slide-resistant pile construction adopts manual hole digging, so that the manual excavation amount is large, the efficiency is low, the construction is seriously influenced by the construction period of the earthwork, and the required construction period is long. In rainy seasons, construction cannot be performed frequently, and the influence of seasons is great. The method has great influence on treatment projects with strict requirements on construction period.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a cantilever supporting construction is consolidated to variable cross section shaped steel to solve the technical problem that current uniform section friction pile strutted and exists.
The utility model discloses a variable cross-section steel reinforced cantilever supporting structure, which comprises a plurality of pile bodies erected on one side of a slope;
the pile body is sequentially provided with a common reinforced concrete pile cantilever section, a variable-section reinforced concrete pile cantilever section, a section steel reinforced concrete pile embedded section, a variable-section reinforced concrete pile embedded section and a common reinforced concrete pile embedded section from top to bottom, the cross section of the common reinforced concrete pile cantilever section is smaller than that of the section steel reinforced concrete pile cantilever section, and the cross section of the common reinforced concrete pile embedded section is smaller than that of the section steel reinforced concrete pile embedded section;
one side of the common reinforced concrete pile cantilever section, the variable cross-section reinforced concrete pile cantilever section and the profile steel reinforced concrete pile cantilever section is empty, and the other side of the common reinforced concrete pile cantilever section, the variable cross-section reinforced concrete pile cantilever section and the profile steel reinforced concrete pile cantilever section are in contact with the landslide body;
the section steel reinforced concrete pile embedded section, the variable cross-section reinforced concrete pile embedded section and the common reinforced concrete pile embedded section are positioned in the sliding bed;
the pile body consists of a reinforcement cage, section steel arranged in the reinforcement cage and a concrete casting body wrapping the reinforcement cage and the section steel; the length direction of the section steel is the same as that of the pile body, the upper end of the section steel is embedded in the cantilever section of the reinforced concrete pile with the variable cross section, and the upper end of the section steel is embedded in the embedded section of the reinforced concrete pile with the variable cross section.
Furthermore, the steel reinforcement cage is composed of a plurality of longitudinal reinforcements and a plurality of stirrups, and the distribution density of the longitudinal reinforcements on one side of the pile body, which is in contact with the landslide body, is greater than that of the longitudinal reinforcements on other sides of the pile body.
Further, the cross section of the pile body is circular or rectangular.
Furthermore, the section steel is I-shaped steel, and two flanges of the I-shaped steel face the air facing surface and the landslide body respectively.
The utility model has the advantages that:
the utility model discloses cantilever supporting construction is consolidated to variable cross section shaped steel, it has changed the supporting construction mode of cross-section such as current supporting construction and wait rigidity, and it has adopted the pile body of variable cross section and the mode of built-in shaped steel to the rigidity at the different positions of reinforcing pile body, this cantilever supporting construction is consolidated to variable cross section shaped steel compares with current equal cross-section supporting construction commonly used, can effectively reduce structure geometry, reduce the reinforcing bar quantity, high-efficient transmission landslide thrust under ensureing structure self safe condition.
The utility model discloses cantilever supporting construction is consolidated to variable cross section shaped steel is applicable to large-scale, huge ground matter slope, high slope of cutting, deep basal pit slope, especially is used for there being important building (structure) and the ground matter slope that slope top displacement needs strict control, high slope of cutting and deep basal pit slope on the slope top to realize anti-skidding slope.
Drawings
FIG. 1 is a schematic view of a cantilever supporting structure reinforced by variable-section steel in the embodiment.
FIG. 2 is a schematic cross-sectional view of a general reinforced concrete pile cantilever section or a general reinforced concrete pile embedded section of a circular pile body;
FIG. 3 is a schematic cross-sectional view of a cantilever section or an embedded section of a variable-section reinforced concrete pile of a circular pile body;
FIG. 4 is a schematic cross-sectional view of a cantilever section and an embedded section of a section steel reinforced concrete pile of a circular pile body;
FIG. 5 is a schematic cross-sectional view of a cantilever section or an embedded section of a regular reinforced concrete pile of a rectangular pile body;
FIG. 6 is a schematic cross-sectional view of a cantilever section or an embedded section of a reinforced concrete pile with a variable cross-section of a rectangular pile body;
fig. 7 is a schematic cross-sectional view of a cantilever section of a section steel reinforced concrete pile and an embedded section of the section steel reinforced concrete pile of a rectangular pile body.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in the drawings, the variable section steel reinforced cantilever supporting structure in the embodiment includes a plurality of pile bodies erected on one side of a slope, and the cross section of each pile body may be circular or rectangular.
The pile body from top to bottom is ordinary reinforced concrete pile cantilever section 1, variable cross section reinforced concrete pile cantilever section 2, shaped steel reinforcing reinforced concrete pile cantilever section 3, shaped steel reinforcing reinforced concrete pile embedded section 4, variable cross section reinforced concrete pile embedded section 5 and ordinary reinforced concrete pile embedded section 6 in proper order, the cross section of ordinary reinforced concrete pile cantilever section 1 is less than the cross section of shaped steel reinforcing reinforced concrete pile cantilever section 3, and the cross section of ordinary reinforced concrete pile embedded section 6 is less than the cross section of shaped steel reinforcing reinforced concrete pile embedded section 4.
The bevel slope comprises a sliding bed and a sliding body positioned on the sliding bed. One side of the common reinforced concrete pile cantilever section 1, the variable cross-section reinforced concrete pile cantilever section 2 and the profile steel reinforced concrete pile cantilever section 3 is empty, and the other side is in contact with the landslide body. The section steel reinforced concrete pile embedded section 4, the variable cross-section reinforced concrete pile embedded section 5 and the common reinforced concrete pile embedded section 6 are positioned in the sliding bed.
The pile body consists of a reinforcement cage 8, section steel 7 arranged in the reinforcement cage and a concrete casting body 9 wrapping the reinforcement cage and the section steel; the length direction of the section steel 7 is the same as that of the pile body, the upper end of the section steel 7 is embedded in the variable cross-section reinforced concrete pile cantilever section 2, and the upper end of the section steel 7 is embedded in the variable cross-section reinforced concrete pile embedded section 5.
In this embodiment, the steel reinforcement cage 8 is composed of a plurality of longitudinal bars 81 and a plurality of stirrups 82, and the distribution density of the longitudinal bars on one side of the pile body in contact with the landslide body is greater than that of the longitudinal bars on the other sides of the pile body, and this arrangement mode of the longitudinal bars is favorable for reducing the number of the longitudinal bars under the condition of ensuring the self structural safety.
In this embodiment, the section steel 7 is an i-beam, and two flanges of the i-beam face the sky surface and the landslide body respectively. The two flanges of the I-shaped steel face the empty face and the landslide body respectively, so that the tensile property of the pile body can be enhanced.
Through the addition of shaped steel 7, can reduce displacement and the internal force that ordinary reinforced concrete pile cantilever section 1 transmitted to variable cross section reinforced concrete pile cantilever section 2 and shaped steel reinforcement reinforced concrete pile cantilever section 3 to reduce this displacement and the influence of internal force to variable cross section reinforced concrete pile cantilever section 2 and shaped steel reinforcement reinforced concrete pile cantilever section 3.
The section steel reinforced concrete pile embedded section 4 and the variable cross-section reinforced concrete pile embedded section 5 are located inside the landslide body, and through the addition of the section steel 7, the displacement and the internal force of the variable cross-section reinforced concrete pile cantilever section 2 and the section steel reinforced concrete pile cantilever section 3 transferred to the section steel reinforced concrete pile embedded section 4 and the variable cross-section reinforced concrete pile embedded section 5 can be reduced, the influence of the displacement and the internal force on the section steel reinforced concrete pile embedded section 4 and the variable cross-section reinforced concrete pile embedded section 5 can be reduced, and part of residual sliding force is transferred to a rock-soil body before the pile. The common reinforced concrete pile embedded section 6 is internally provided with variable cross section profile steel, and internal force transmitted to the common reinforced concrete pile embedded section 6 from the profile steel reinforced concrete pile embedded section 4 and the variable cross section reinforced concrete pile embedded section 5 is transmitted to the rock-soil mass embedded at the periphery of the common reinforced concrete pile embedded section.
In the embodiment, the variable cross-section steel reinforced cantilever supporting structure changes the mode of the existing supporting structure with equal cross section and equal rigidity, adopts the mode of the variable cross-section pile body and the built-in section steel to enhance the rigidity of different parts of the pile body, and compared with the existing common constant cross-section supporting structure, the variable cross-section steel reinforced cantilever supporting structure can effectively reduce the geometric dimension of the structure, reduce the using amount of reinforcing steel bars and efficiently transmit landslide thrust under the condition of ensuring the safety of the structure.
The variable cross-section steel reinforced cantilever supporting structure in the embodiment is suitable for large and huge geotechnical slope slopes, high cut slopes and deep foundation pit slopes, and is particularly suitable for geotechnical slope slopes, high cut slopes and deep foundation pit slopes with important buildings (structures) on the slope tops and slope top displacement needing to be strictly controlled, so as to realize landslide prevention.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (4)
1. The utility model provides a cantilever supporting construction is consolidated to variable cross section shaped steel which characterized in that: comprises a plurality of pile bodies which are erected on one side of a bevel slope;
the pile body is sequentially provided with a common reinforced concrete pile cantilever section (1), a variable-section reinforced concrete pile cantilever section (2), a section steel reinforced concrete pile cantilever section (3), a section steel reinforced concrete pile embedded section (4), a variable-section reinforced concrete pile embedded section (5) and a common reinforced concrete pile embedded section (6) from top to bottom, the cross section of the common reinforced concrete pile cantilever section (1) is smaller than that of the section steel reinforced concrete pile cantilever section (3), and the cross section of the common reinforced concrete pile embedded section (6) is smaller than that of the section steel reinforced concrete pile embedded section (4);
one side of the common reinforced concrete pile cantilever section (1), the variable cross-section reinforced concrete pile cantilever section (2) and the profile steel reinforced concrete pile cantilever section (3) is empty, and the other side of the common reinforced concrete pile cantilever section is in contact with the landslide body;
the section steel reinforced concrete pile embedded section (4), the variable cross-section reinforced concrete pile embedded section (5) and the common reinforced concrete pile embedded section (6) are positioned in the sliding bed;
the pile body consists of a reinforcement cage, section steel arranged in the reinforcement cage and a concrete casting body wrapping the reinforcement cage and the section steel; the length direction of the section steel (7) is the same as that of the pile body, the upper end of the section steel (7) is embedded in the variable cross-section reinforced concrete pile cantilever section (2), and the upper end of the section steel (7) is embedded in the variable cross-section reinforced concrete pile embedded section (5).
2. The variable cross-section steel reinforced cantilever supporting structure of claim 1, wherein: the reinforcement cage comprises a plurality of longitudinal bars and a plurality of stirrups, and the distribution density of the longitudinal bars on one side of the pile body, which is in contact with the landslide body, is greater than that of the longitudinal bars on the other sides of the pile body.
3. The variable cross-section steel reinforced cantilever supporting structure of claim 1, wherein: the cross section of the pile body is circular or rectangular.
4. The variable cross-section steel reinforced cantilever supporting structure of claim 1, wherein: the section steel (7) is I-shaped steel, and two flanges of the I-shaped steel face the air facing surface and the landslide body respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675312.XU CN213086823U (en) | 2020-08-12 | 2020-08-12 | Variable cross-section steel reinforced cantilever supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675312.XU CN213086823U (en) | 2020-08-12 | 2020-08-12 | Variable cross-section steel reinforced cantilever supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213086823U true CN213086823U (en) | 2021-04-30 |
Family
ID=75630559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021675312.XU Active CN213086823U (en) | 2020-08-12 | 2020-08-12 | Variable cross-section steel reinforced cantilever supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213086823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673140A (en) * | 2022-03-22 | 2022-06-28 | 浙江工业大学 | Structure for connecting variable cross-section nodes of H-shaped steel-RC (reinforced concrete) stepped pile and construction method of structure |
-
2020
- 2020-08-12 CN CN202021675312.XU patent/CN213086823U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673140A (en) * | 2022-03-22 | 2022-06-28 | 浙江工业大学 | Structure for connecting variable cross-section nodes of H-shaped steel-RC (reinforced concrete) stepped pile and construction method of structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112989465B (en) | Design method of slope deep-buried shear pile supporting structure based on plane sliding method | |
| CN111236258A (en) | Prefabricated pile wall supporting structure with stiffening rib wall and unloading platform and construction method thereof | |
| CN111236260A (en) | Variable-rigidity combined type prefabricated double-row pile supporting structure and construction method thereof | |
| CN111893809A (en) | Variable-spacing rigid pile composite foundation for improving stability of embankment | |
| CN101793098B (en) | Coordinated interactive combined rectification method | |
| CN213086823U (en) | Variable cross-section steel reinforced cantilever supporting structure | |
| CN107938685A (en) | A kind of new diagonal brace composite support device | |
| CN108755745A (en) | A kind of Novel section steel cantilever retaining structure and its design and calculation method | |
| CN206418509U (en) | A kind of anchored pile supporting of high gradient slope | |
| CN112287446A (en) | Method for designing diagonal bracing composite supporting structure based on three-dimensional geological information model | |
| CN113882425B (en) | Hole digging foundation structure for high and steep slope and construction method | |
| CN215801664U (en) | Rigid rib wall type pile wall foundation pit supporting structure | |
| CN208105309U (en) | A kind of fashioned iron cantilever retaining structure | |
| CN2197388Y (en) | T-shape retaining wall | |
| CN102235017B (en) | Lateral force resisting method for soft soil foundation building | |
| CN211873052U (en) | Landslide reinforcement engineering structure | |
| CN113404060A (en) | Rigid rib wall type pile wall foundation pit supporting structure and construction method | |
| CN220433681U (en) | Deep foundation pit supporting structure | |
| CN111270682A (en) | Underground continuous wall structure with high vertical bearing capacity and construction method thereof | |
| CN111502691B (en) | Anti-skid tunnel structure and construction method thereof | |
| CN213114609U (en) | Anti-skidding stake and anti-skidding slope structure that tailing storehouse was used | |
| CN210263019U (en) | Combined prefabricated pile with rib | |
| CN219011249U (en) | Rotary spraying inclined plate soil layer anchor-pull retaining wall | |
| CN218175854U (en) | M-shaped wall foundation pit supporting structure using transverse single-width underground continuous wall as counterfort | |
| CN219262393U (en) | Tunnel pile foundation reinforced structure penetrating through hall-type karst cave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |