CN114561956A - Emergency rescue structure for foundation pit engineering without inner support - Google Patents
Emergency rescue structure for foundation pit engineering without inner support Download PDFInfo
- Publication number
- CN114561956A CN114561956A CN202210247417.2A CN202210247417A CN114561956A CN 114561956 A CN114561956 A CN 114561956A CN 202210247417 A CN202210247417 A CN 202210247417A CN 114561956 A CN114561956 A CN 114561956A
- Authority
- CN
- China
- Prior art keywords
- steel frame
- steel
- foundation pit
- emergency rescue
- profile steel
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 93
- 239000010959 steel Substances 0.000 claims abstract description 93
- 238000010276 construction Methods 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 7
- 229910000746 Structural steel Inorganic materials 0.000 claims 2
- 230000002787 reinforcement Effects 0.000 description 7
- 238000009412 basement excavation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Images
Classifications
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/40—Miscellaneous comprising stabilising elements
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- Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to an emergency rescue structure for foundation pit engineering without an inner support, which comprises an engineering pile, a profile steel frame, a thick steel plate, an inclined support and a supporting structure, wherein the periphery of the engineering pile is formed into a steel frame structure by combining the profile steel frame, and the thick steel plate is arranged at the lower part of the profile steel frame structure for stress diffusion to prevent profile steel from sinking into the soil; and an inclined support is arranged between the profile steel frame structure and the supporting structure, so that the whole profile steel frame structure and the supporting structure form a triangular stable structure. According to the construction method, the construction of the emergency rescue structure is carried out at the risk part, so that the risk of collapse of the foundation pit engineering can be reduced, and the smooth operation of the engineering is guaranteed.
Description
Technical Field
The invention relates to a structural system for emergency rescue formed by combining engineering piles and profile steel under the conditions that a foundation pit without an inner support is in a dangerous situation after excavation and a traditional supporting system is erected without an operation surface.
Background
The development of underground space accelerates gradually at present, nevertheless because geological survey is not in place or the level of construction is uneven, causes the foundation ditch to begin to appear continuously warping behind the local excavation supporting structure, or leads to the continuous uplift of hole end soil body because of local defect, and the ground outside the hole continuously subsides, and foundation ditch safety produces huge risk, and this moment because the foundation ditch does not form the bottom plate structure, traditional bearing structure does not have effectual back support, can't support the position that is producing the risk.
Disclosure of Invention
The invention mainly solves the problem that when the foundation pit excavation generates risks, under the condition that a base plate is not formed and the traditional support cannot be adopted for reinforcement, the emergency rescue support is carried out on the deformed supporting structure, and provides the emergency rescue structure for the foundation pit engineering without the inner support.
In order to achieve the purpose, the invention adopts the technical scheme that: an emergency rescue structure for foundation pit engineering without an inner support comprises an engineering pile, a profile steel frame, a thick steel plate, an inclined support and a supporting structure, wherein the periphery of the engineering pile is formed into a steel frame structure by combining the profile steel frame, and the thick steel plate is arranged at the lower part of the profile steel frame structure for stress diffusion to prevent profile steel from sinking into the soil; and an inclined support is arranged between the profile steel frame structure and the supporting structure, so that the whole profile steel frame structure and the supporting structure form a triangular stable structure.
Further, the section steel frame structure is in a shape like the Chinese character 'ri' or a shape like the Chinese character 'mu', and the section steel frames are fixedly connected through bolts.
Furthermore, the profile steel frame tightly surrounds the engineering pile and is reliably connected with the engineering pile.
Further, the top of the engineering pile is reinforced by core filling.
Furthermore, the thickness of the thick steel plate is more than or equal to 20mm, the size of the thick steel plate is larger than that of the structural size of the section steel frame, and each side of the thick steel plate is at least 100mm larger.
Furthermore, the inclined support is formed by steel section or steel pipe support or axial force automatic compensation steel support.
Furthermore, the inclined support is connected with a capping beam of the supporting structure through a steel anchor plate and a chemical anchor bolt.
The invention has the beneficial effects that:
the invention utilizes the sectional steel combined type component to connect the engineering piles excavated in a small range into a frame system, the chemical anchor bolt fixing anchor plate is arranged on the top ring beam of the original supporting structure, the oblique section steel support is arranged on the anchor plate, one end of the oblique section steel support is supported on the frame system, and the other end of the oblique section steel support is supported on the anchor plate, thereby forming a stable triangular system.
According to the construction method, the construction of the emergency rescue structure is carried out at the risk part, so that the risk of collapse of the foundation pit engineering can be reduced, and the smooth operation of the engineering is guaranteed.
Drawings
FIG. 1 is a side view of an engineering pile and profile steel combined emergency rescue structure;
FIG. 2 is a top view of an engineering pile and section steel combined emergency rescue structure;
FIG. 3 is a detailed view of engineering pile top reinforcement;
FIG. 4 is a detailed view of the combination of the engineering pile and the section steel structure;
FIG. 5 is a view showing the combination and arrangement of the section steel frames in a shape like the Chinese character 'ri';
FIG. 6 is a view showing the shape of a grid of the steel section frame;
fig. 7 is a schematic view of a thick steel plate.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1 to 7, an engineering pile and profile steel combined emergency rescue structure applied to foundation pit engineering without an inner support comprises an engineering pile 1, a profile steel frame 2, a thick steel plate 3, a top grouted core 4, a capping beam 5, a chemical anchor bolt 6, a steel anchor plate 7, an inclined support 8 and a supporting structure 9.
The periphery of the engineering pile 1 is provided with a steel frame structure formed by combining profile steel frames 2, the whole profile steel frame structure is combined to be in a shape like a Chinese character 'ri' (see fig. 5) or a shape like a Chinese character 'mu' (see fig. 6), the profile steel frame structure is connected by bolts 10, and the lower part of the profile steel frame structure is provided with a thick steel plate 3 for stress diffusion to prevent the profile steel from sinking into the soil. An inclined support 8 is arranged between the whole section steel frame structure and the supporting structure 9, so that the whole section steel frame structure and the supporting structure 9 form a triangular stable structure.
Preferably, the steel frame 2 tightly surrounds the engineering pile 1 and is securely connected with the engineering pile 1.
Preferably, the engineering pile 1 is subjected to top reinforcement treatment in advance, and the top reinforcement treatment adopts top pouring core 4 treatment.
Preferably, the thickness of the thick steel plate 3 is not less than 20mm, the size is larger than that of the structural size of the section steel frame, and each side of the thick steel plate is smaller than 100 mm. And a hole 11 is formed in the thick steel plate 3 corresponding to the pouring core 4 at the top of the engineering pile 1.
Preferably, the inclined strut 8 can adopt a section steel, a steel pipe strut or an axial force automatic compensation steel strut.
Preferably, the inclined strut 8 is connected with the capping beam 5 of the supporting structure 9 through a steel anchor plate 7 and a chemical anchor bolt 6.
The method comprises the following specific implementation steps:
engineering pile top reinforcement
And (3) firstly carrying out top reinforcement on the exposed engineering pile at the position for emergency, wherein the top reinforcement method adopts core filling treatment.
Secondly, forming a frame system at the periphery of the engineering pile
The engineering pile is characterized in that a profile steel frame structure is formed on the periphery of the engineering pile, the profile steel frame is in an H shape when lying on the thick steel plate, the whole frame structure is in a reversed Y shape or a mesh shape after being combined, the profile steel frame structure is connected through bolts, the thick steel plate is arranged on the lower portion of the profile steel frame structure to conduct stress diffusion, and profile steel is prevented from sinking into the soil.
Thirdly, mounting a supporting system to form a triangular stable structure
And chemical anchor bolts are embedded in the supporting pile capping beams which continuously deform to install steel anchor plates, and the size of each steel anchor plate is larger than that of each inclined support, so that the steel anchor plates are convenient to weld and fix. The profile steel support is integrally machined and cut according to field measurement, a triangular cut angle is formed at the end part, the hanging type inclined support is installed, the inclined support is in a regular I shape, one end of the inclined support is supported at the position of a profile steel frame of an engineering pile, the other end of the inclined support is supported at a steel anchor plate on a capping beam, and the inclined support is clamped by a chemical anchor bolt and then is welded and fixed.
Claims (7)
1. The utility model provides an emergent structure of speedily carrying out rescue work for supporting in foundation ditch engineering in not having, includes engineering pile, shaped steel frame, thick steel plate, bearing diagonal, supporting construction, its characterized in that: the periphery of the engineering pile is formed into a steel frame structure by combining profile steel frames, and a thick steel plate is arranged at the lower part of the profile steel frame structure for stress diffusion to prevent profile steel from sinking into the soil; and an inclined support is arranged between the profile steel frame structure and the supporting structure, so that the whole profile steel frame structure and the supporting structure form a triangular stable structure.
2. The emergency rescue structure for use in unsupported inner support foundation pit engineering according to claim 1, characterized in that: the structural steel frame structure is in a shape like the Chinese character 'ri' or a shape like the Chinese character 'mu', and the structural steel frames are fixedly connected by bolts.
3. The emergency rescue structure for use in unsupported inner support foundation pit engineering according to claim 1, characterized in that: the profile steel frame tightly surrounds the engineering pile and is reliably connected with the engineering pile.
4. The emergency rescue structure for use in unsupported inner support foundation pit engineering according to claim 1, characterized in that: and the top of the engineering pile is reinforced by filling a core.
5. The emergency rescue structure for use in unsupported inner support foundation pit engineering according to claim 1, characterized in that: the thickness of the thick steel plate is more than or equal to 20mm, the size of the thick steel plate is larger than that of the structural size of the section steel frame, and each side of the thick steel plate is at least 100mm larger.
6. The emergency rescue structure for use in unsupported inner support foundation pit engineering according to claim 1, characterized in that: the inclined support is a profile steel support, a steel pipe support or an axial force automatic compensation steel support.
7. The emergency rescue structure for use in unsupported inner support foundation pit engineering according to claim 1, characterized in that: the inclined support is connected with the capping beam of the supporting structure through a steel anchor plate and a chemical anchor bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247417.2A CN114561956A (en) | 2022-03-14 | 2022-03-14 | Emergency rescue structure for foundation pit engineering without inner support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247417.2A CN114561956A (en) | 2022-03-14 | 2022-03-14 | Emergency rescue structure for foundation pit engineering without inner support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114561956A true CN114561956A (en) | 2022-05-31 |
Family
ID=81720683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210247417.2A Pending CN114561956A (en) | 2022-03-14 | 2022-03-14 | Emergency rescue structure for foundation pit engineering without inner support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114561956A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07252835A (en) * | 1994-03-15 | 1995-10-03 | Toda Constr Co Ltd | Construction method for diagonal shore strut |
| CN108951657A (en) * | 2018-08-21 | 2018-12-07 | 山东正元建设工程有限责任公司 | A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace |
| CN209585054U (en) * | 2018-12-24 | 2019-11-05 | 上海建工二建集团有限公司 | Be used for foundation ditch to speedily carry out rescue work emergent bracing fast |
-
2022
- 2022-03-14 CN CN202210247417.2A patent/CN114561956A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07252835A (en) * | 1994-03-15 | 1995-10-03 | Toda Constr Co Ltd | Construction method for diagonal shore strut |
| CN108951657A (en) * | 2018-08-21 | 2018-12-07 | 山东正元建设工程有限责任公司 | A kind of pattern foundation pit supporting structure assembled concrete-filled rectangular steel tube diagonal brace |
| CN209585054U (en) * | 2018-12-24 | 2019-11-05 | 上海建工二建集团有限公司 | Be used for foundation ditch to speedily carry out rescue work emergent bracing fast |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220531 |