CN113026765A - Existing support body's reinforcement support body - Google Patents
Existing support body's reinforcement support body Download PDFInfo
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- CN113026765A CN113026765A CN202110354553.7A CN202110354553A CN113026765A CN 113026765 A CN113026765 A CN 113026765A CN 202110354553 A CN202110354553 A CN 202110354553A CN 113026765 A CN113026765 A CN 113026765A
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- 230000002787 reinforcement Effects 0.000 title abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 45
- 239000002689 soil Substances 0.000 claims abstract description 14
- 238000004873 anchoring Methods 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000011150 reinforced concrete Substances 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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 reinforcing support body of an existing support body. The reinforcing support body of the existing support body comprises: the novel anchor pile is characterized in that at least one row of novel short piles are vertically arranged on the slope placing surface of the foundation pit, the novel short piles are arranged on the slope placing surface and are lower than existing anchor parts of existing supporting bodies, horizontal row spacing is arranged between the novel short piles and between the existing supporting bodies and among the novel short piles, and the novel anchor parts are bonded on at least one horizontal row of the slope placing surface soil body. The reinforcing support body of the existing support body has strong anti-overturning capability and is suitable for emergency reinforcement of the existing slope body or the collapsed slope body.
Description
Technical Field
The invention belongs to the technical field of foundation pit support and underground engineering in the field of geotechnical engineering, and particularly relates to a reinforcing support body of an existing support body.
Background
The slope is a slope enough to be released from the edge when the excavation exceeds a certain depth or the fill exceeds a certain height in order to prevent the collapse of the earth wall and ensure the construction safety. The earthwork slope is generally expressed by a slope releasing coefficient, and the slope releasing coefficient refers to the ratio of the slope releasing width B to the excavation depth H, namely K is B/H. The slope is not only used for the soil slope, but also the engineering treatment mode of slope is often adopted for the rock slope in order to keep the stability of the rock slope.
At present, the method of burying support piles on the slope surface is generally adopted for supporting. Some projects have the situation that the foundation pit supporting system is constructed, but the building size is changed, and the foundation pit needs to be deepened. At the moment, the slope surface needs to be reinforced to prevent collapse; or the existing slope surface is likely to cause the reduction of cohesive force of soil body due to water infiltration or collapse due to the fact that the slope toe is washed and hollowed out because no drainage measure is made on the slope top and the slope toe. Aiming at the collapse treatment of the existing slope body, a reinforcing support body of the existing support body also needs to be designed.
Disclosure of Invention
The invention aims to: the reinforcing support body of the existing support body is provided to solve the problem that collapse of the existing slope body needs to be prevented or the collapsed slope body needs to be reinforced in emergency in foundation pit deepening in the prior art.
The technical scheme adopted by the invention is as follows:
a reinforcing support body for an existing support body. The reinforcing support body of the existing support body comprises: the foundation pit supporting device comprises at least one row of newly-increased short piles vertically arranged on a sloping surface of a foundation pit, wherein the newly-increased short piles are arranged at positions, lower than existing anchoring parts of existing supporting bodies, on the sloping surface, horizontal row spacing is arranged between the newly-increased short piles and the existing supporting bodies and between each row of the newly-increased short piles, and at least one row of newly-increased anchoring parts are horizontally arranged and bonded in soil of the sloping surface, and the newly-increased anchoring parts are locked on the newly-increased short piles; or, arranging newly-increased connecting ribs in a transverse row on the newly-increased short piles, and locking the newly-increased anchoring parts on the newly-increased connecting ribs; or the newly added anchoring piece, the newly added short pile and the newly added contact bar are locked together at the same time.
In the above technical solution, the reinforcing support body of the existing support body includes at least one row of newly-added short piles vertically arranged, and the newly-added short piles are arranged below the existing anchoring member of the existing support body at a certain distance, that is, at a position close to the toe of the slope. The newly-increased stub with existing support body forms certain difference in height on putting domatic, from one row nearest at the bottom of the basic pit newly-increased stub to one row nearest at the top of the slope existing support body is ascending notch cuttype support gradually, makes the reinforcing support body subregion of existing support body bears and puts domatic soil body, and this makes whole supporting construction's antidumping ability obtain very big degree's improvement, the prevention domatic collapse that can be fine, landslide.
Regarding the connection relationship between the new anchor and the new stub, the following three ways are possible:
(1) the newly increased anchoring part is directly locked on the newly increased short pile;
(2) arranging newly-increased connecting ribs in a transverse row on the newly-increased short piles, and locking the newly-increased anchoring parts on the newly-increased connecting ribs without contacting with the newly-increased short piles;
(3) and newly-increased connecting ribs arranged transversely are arranged on the newly-increased short piles, and the newly-increased anchoring parts, the newly-increased short piles and the newly-increased connecting ribs are locked together at the same time.
In the schemes (2) and (3), the newly-added tie bars have a reinforcing effect on the whole row integrity of the newly-added stub piles, when the newly-added stub piles are stressed too much at a certain position, other newly-added stub piles have a supplementing effect due to the effect of the newly-added tie bars, and therefore the stability of the reinforcing support body of the existing support body provided by the invention is improved. Of these three alternatives, the most preferred alternative is (3).
Furthermore, the newly-added short piles and the existing supporting bodies are arranged in a staggered mode, a supporting structure with even stress is formed on the slope placing surface, the newly-added short piles close to the next row form supplementary protection for soil bodies between the two adjacent supporting bodies close to the previous row, and the bearing capacity and the overturning resistance of the reinforcing supporting body of the whole existing supporting body are further improved.
Furthermore, at least one newly-added anchoring part is arranged while one newly-added short pile is arranged, so that the stability of the reinforcing support body of the existing support body is improved to the maximum extent.
Further, the horizontal pitch is 0.15 to 4m, preferably 0.2 to 2 m. Generally, the steeper the ramp surface, the smaller the horizontal pitch.
According to the method, the specific row number of the newly added short piles is selected according to the depth increased by the foundation pit or the collapse area of the slope body, and in principle, the row number of the newly added short piles is increased along with the deeper foundation pit or the larger collapse area of the slope body. Furthermore, the newly-added short piles are arranged in at least two rows, each row of newly-added short piles and the existing support body form a three-level stepped support, pressure on each row of newly-added short piles is dispersed, and safety is higher; in addition, two rows of the newly-increased short piles and the existing supporting bodies form a net structure together, so that the whole slope surface is better protected.
It is understood that the existing support body may include: the anchor pile comprises a row of existing support piles vertically arranged on a sloping surface of a foundation pit, and at least one transverse row of existing anchor pieces bonded in soil mass on the side wall of the foundation pit, wherein the existing anchor pieces are locked on the existing support piles; or existing connecting ribs in transverse rows are arranged on a plurality of existing support piles, and the existing anchoring pieces are locked on the existing connecting ribs; or the existing anchoring part, the existing supporting pile and the existing connecting rib are locked together at the same time, and the existing crown beam is arranged at the top end of the existing supporting pile. Or may be other forms of existing supports.
Further, the newly-added stub piles and the existing supporting piles include, but are not limited to, reinforced concrete piles, concrete plain piles, micro steel pipe piles, jet grouting piles, cement mixing piles and the like.
Further, the new anchor includes, but is not limited to, soil nails, anchor rods, anchor cables, and the like.
Further, the new contact bar includes, but is not limited to, steel bar, channel steel, i-steel, reinforced concrete beam, and the like.
Further, a newly-added crown beam is arranged at the top end of the newly-added short pile. The newly-added crown beam is a steel bar, channel steel, I-shaped steel or reinforced concrete continuous beam arranged at the top end of the newly-added short pile, and is used for connecting each row of the newly-added short piles together, so that the strength of the reinforcing support body of the existing support body is further increased, and the stress requirement is met.
Further, a concrete layer is arranged in a gap area between the newly-added short pile and the existing support pile on the slope surface, and the concrete layer has certain functions of preventing rainwater from scouring and reinforcing the slope surface.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the reinforcing support body of the existing support body forms a stepped support for the slope surface, so that the anti-overturning capability of the whole support body is improved to a great extent, the construction safety requirement of the foundation pit deepening slope surface support can be well met, the slope surface collapse is effectively prevented, or the reinforcing support body is used for emergency reinforcement of a collapsed slope body.
Drawings
FIG. 1 is a slope elevation view of a reinforcing brace of an existing brace of the present invention;
FIG. 2 is a top view of a hill top of a reinforcing brace of an existing brace of the present invention;
FIG. 3 is a cross-sectional view of a reinforcing brace of an existing brace of the present invention;
FIG. 4 is another slope elevation view of a reinforcing brace of an existing brace of the present invention
Figure 5 is yet another ramp elevational view of a reinforcing brace of an existing brace of the present invention.
Description of the reference numerals
1: placing a slope surface; 2: newly adding a short pile; 3: newly adding an anchoring part; 4: newly adding tie bars; 5: existing supporting piles are arranged; 6: existing anchors; 7: existing connecting ribs; 8: existing crown beams; 9: and (5) adding a crown beam.
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, means, elements well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
FIG. 1 is a slope elevation view of a reinforcing brace of an existing brace of the present invention; FIG. 2 is a top view of a hill top of a reinforcing brace of an existing brace of the present invention; FIG. 3 is a cross-sectional view of a reinforcing brace of an existing brace of the present invention; FIG. 4 is another ramp surface elevation view of a reinforcing brace of the existing brace of the present invention; figure 5 is yet another ramp elevational view of a reinforcing brace of an existing brace of the present invention. As shown in fig. 1 to 5, the reinforcing brace of the existing brace includes: the foundation pit supporting device comprises at least one row of newly-increased short piles 2 vertically arranged on a foundation pit slope surface 1, wherein the newly-increased short piles 2 are arranged at the position, lower than existing anchoring parts 6 of existing supporting bodies, of the slope surface 1, horizontal row distances are arranged between the newly-increased short piles 2 and the existing supporting bodies and between the rows of newly-increased short piles 2, and at least one row of newly-increased anchoring parts 3 are bonded in soil bodies of the slope surface 1, at least one newly-increased anchoring part 3 is arranged while one newly-increased short pile 2 is arranged, and the newly-increased anchoring parts 3 are locked on the newly-increased short piles 2; or, newly-added tie bars 4 arranged transversely are arranged on the newly-added short piles 2, and the newly-added anchoring parts 3 are locked on the newly-added tie bars 4; or the newly added anchoring piece 3, the newly added stub 2 and the newly added tie bar 4 are locked together at the same time.
In the above technical solution, the reinforcing support body of the existing support body includes at least one row of newly-added short piles 2 vertically arranged, and the newly-added short piles 2 are arranged below the existing anchoring member 6 of the existing support body at a certain distance, that is, at a position close to the toe of the slope. The newly-added short piles 2 and the existing supporting bodies form a certain height difference on the slope-laying surface 1, and the gradually-rising ladder-shaped support is formed from the newly-added short piles 2 in the row nearest to the bottom of the foundation pit to the existing supporting bodies in the row nearest to the top of the slope, so that the reinforcing supporting bodies of the existing supporting bodies bear the soil mass of the slope-laying surface in different areas, the anti-overturning capacity of the whole supporting structure is greatly improved, and slope collapse and slope sliding can be well prevented.
Regarding the connection relationship between the newly added anchoring member 3 and the newly added stub 2, the following three ways are possible:
(1) the newly added anchoring piece 3 is directly locked on the newly added short pile 2;
(2) newly-added tie bars 4 arranged transversely are arranged on the newly-added short piles 2, and the newly-added anchoring parts 3 are locked on the newly-added tie bars 4 and are not in contact with the newly-added short piles 2;
(3) newly-increased tie bar 4 of horizontal row is provided with on a plurality of newly-increased stub 2, newly-increased anchor assembly 3 and newly-increased stub 2, newly-increased tie bar 4 lock together simultaneously.
For the schemes (2) and (3), the newly added tie bars 4 have a reinforcing effect on the whole row integrity of the newly added stub piles 2, when the stress of the newly added stub piles 2 at a certain position is too large, other newly added stub piles 2 have a complementary effect due to the effect of the newly added tie bars 4, and therefore the stability of the reinforcing support body of the existing support body provided by the invention is improved. Of these three alternatives, the most preferred alternative is (3).
Further, newly-increased stub 2 and existing support body dislocation arrangement form the even supporting construction of atress on putting domatic 1, lean on newly-increased stub 2 of next row to form the additional protection to the soil body between two adjacent existing support bodies that lean on the last row, have further improved the bearing capacity and the antidumping nature of the reinforcement support body of whole existing support body.
Furthermore, at least one newly-added anchoring part 3 is arranged at the same time of arranging one newly-added short pile 2, so that the stability of the reinforcing support body of the existing support body is improved to the maximum extent.
Further, the horizontal pitch is 0.15 to 4m, preferably 0.2 to 2 m. In general, the steeper the ramp surface 1, the smaller the horizontal pitch.
According to the method, the specific row number of the newly added short piles 2 is selected according to the depth increased by the foundation pit or the collapse area of the slope body, and in principle, the deeper the foundation pit or the larger the collapse area of the slope body is, the row number of the newly added short piles 2 is increased along with the increase. Furthermore, the newly added short piles 2 are at least two rows, each row of newly added short piles 2 and the existing support body form a three-level stepped support, pressure on each row of newly added short piles is dispersed, and safety is higher; in addition, two rows of newly-increased stub 2 and existing support body form network structure jointly, and the guard action to whole slope 1 of putting is better.
It is understood that existing supports may include: the foundation pit anchoring device comprises a row of existing supporting piles 5 vertically arranged on a sloping surface of a foundation pit, at least one transverse row of existing anchoring pieces 6 bonded in soil on the side wall of the foundation pit, and the existing anchoring pieces 6 locked on the existing supporting piles 5; or existing connecting ribs 7 in transverse rows are arranged on a plurality of existing support piles 5, and the existing anchoring pieces 6 are locked on the existing connecting ribs 7; or the existing anchor 6 is locked together with the existing support pile 5, the existing tie bar 7 at the same time, and the existing crown beam 8 is provided at the top end of the existing support pile 5. Or may be other forms of existing supports.
Further, the newly added stub pile 2 and the existing support pile 5 include, but are not limited to, a reinforced concrete pile, a concrete plain pile, a micro steel pipe pile, a jet grouting pile, a cement mixing pile, and the like.
Further, the new anchor 3 includes, but is not limited to, earth nails, bolts, and anchor cables, etc.
Further, the new tie bars 4 include, but are not limited to, steel bars, channel beams, i-beams, reinforced concrete beams, and the like.
Further, a newly-added crown beam 9 is arranged at the top end of the newly-added short pile 2. The newly added crown beam 9 is a steel bar, channel steel, I-shaped steel or reinforced concrete continuous beam arranged at the top end of the newly added short pile 2, and has the function of connecting each row of the newly added short piles together, further increasing the strength of the reinforcing support body of the existing support body and meeting the stress requirement.
Further, a concrete layer is arranged in the gap area between the newly-added short pile 2 on the slope surface 1 and the existing support pile 5, and the concrete layer has certain rainwater scouring prevention effect and slope surface reinforcing effect.
In order to reflect the position relationship between the newly added short pile 2 and the existing support pile 5, the newly added crown beam 9 and the existing crown beam 8 are omitted in fig. 2.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A reinforcing brace of an existing brace, comprising: the foundation pit supporting device comprises at least one row of newly-increased short piles vertically arranged on a sloping surface of a foundation pit, wherein the newly-increased short piles are arranged at positions, lower than existing anchoring parts of existing supporting bodies, on the sloping surface, horizontal row spacing is arranged between the newly-increased short piles and the existing supporting bodies and between each row of the newly-increased short piles, and at least one row of newly-increased anchoring parts are horizontally arranged and bonded in soil of the sloping surface, and the newly-increased anchoring parts are locked on the newly-increased short piles; or, arranging newly-increased connecting ribs in a transverse row on the newly-increased short piles, and locking the newly-increased anchoring parts on the newly-increased connecting ribs; or the newly added anchoring piece, the newly added short pile and the newly added contact bar are locked together at the same time.
2. The reinforcing brace of an existing brace of claim 1, wherein the additional stub is offset from the existing brace and from each row of the additional stub.
3. The reinforcing brace of an existing brace of claim 1, wherein a plurality of the additional stubs are provided with additional tie bars in a row, and the additional anchors are locked together with the additional stubs and the additional tie bars.
4. The reinforcing brace of an existing brace of claim 1, wherein the added stakes are in at least two rows.
5. The reinforcing brace of an existing brace of claim 1, wherein at least one of the additional anchors is provided at the same time as one of the additional stubs is provided.
6. Reinforced support of an existing support according to claim 1, characterized in that the horizontal row pitch is 0.15-4m, preferably 0.2-2 m.
7. The reinforcing support of an existing support according to claim 1, wherein the newly added stub pile comprises a reinforced concrete pile, a concrete plain pile, a micro steel pipe pile, a jet grouting pile, and a cement mixing pile.
8. The reinforcing brace of an existing brace of claim 1, wherein the additional anchor comprises a soil nail, a rock bolt, and an anchor cable.
9. A reinforcing brace as claimed in claim 1, wherein the additional tie bars comprise steel bars, channel bars, i-beams and reinforced concrete beams.
10. The reinforcing brace of an existing brace of claim 1, wherein a newly added crown beam is disposed on a top end of the newly added stub, the newly added crown beam comprising steel bars, channel steel, i-steel, and reinforced concrete beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110354553.7A CN113026765A (en) | 2021-03-31 | 2021-03-31 | Existing support body's reinforcement support body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110354553.7A CN113026765A (en) | 2021-03-31 | 2021-03-31 | Existing support body's reinforcement support body |
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| CN113026765A true CN113026765A (en) | 2021-06-25 |
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| CN202110354553.7A Pending CN113026765A (en) | 2021-03-31 | 2021-03-31 | Existing support body's reinforcement support body |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202323970U (en) * | 2011-11-26 | 2012-07-11 | 山东大学 | Combined reinforcement system for side slope |
| CN203514328U (en) * | 2013-07-22 | 2014-04-02 | 深圳市工勘岩土工程有限公司 | Combined anti-slide structure |
| CN105696602A (en) * | 2016-03-17 | 2016-06-22 | 中南勘察设计院（湖北）有限责任公司 | Composite pile-anchor supporting method and structure for deepening excavation |
| CN108487256A (en) * | 2018-03-07 | 2018-09-04 | 中冶集团武汉勘察研究院有限公司 | A kind of ruggedized construction and method that foundation pit deepened is backbreak |
| JP2019210711A (en) * | 2018-06-05 | 2019-12-12 | 鹿島建設株式会社 | Method for reinforcing existing structure in ground |
-
2021
- 2021-03-31 CN CN202110354553.7A patent/CN113026765A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202323970U (en) * | 2011-11-26 | 2012-07-11 | 山东大学 | Combined reinforcement system for side slope |
| CN203514328U (en) * | 2013-07-22 | 2014-04-02 | 深圳市工勘岩土工程有限公司 | Combined anti-slide structure |
| CN105696602A (en) * | 2016-03-17 | 2016-06-22 | 中南勘察设计院（湖北）有限责任公司 | Composite pile-anchor supporting method and structure for deepening excavation |
| CN108487256A (en) * | 2018-03-07 | 2018-09-04 | 中冶集团武汉勘察研究院有限公司 | A kind of ruggedized construction and method that foundation pit deepened is backbreak |
| JP2019210711A (en) * | 2018-06-05 | 2019-12-12 | 鹿島建設株式会社 | Method for reinforcing existing structure in ground |
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Application publication date: 20210625 |
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