CN114232656A - UHPC (ultra high performance polycarbonate) assembled soil nailing wall structure and construction method - Google Patents
UHPC (ultra high performance polycarbonate) assembled soil nailing wall structure and construction method Download PDFInfo
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- CN114232656A CN114232656A CN202210093363.9A CN202210093363A CN114232656A CN 114232656 A CN114232656 A CN 114232656A CN 202210093363 A CN202210093363 A CN 202210093363A CN 114232656 A CN114232656 A CN 114232656A
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- 239000002689 soil Substances 0.000 title claims abstract description 72
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 229920000515 polycarbonate Polymers 0.000 title description 2
- 239000004417 polycarbonate Substances 0.000 title description 2
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 92
- 239000002184 metal Substances 0.000 claims abstract description 38
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000001788 irregular Effects 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 2
- 239000010959 steel Substances 0.000 claims 2
- 239000011440 grout Substances 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 239000004567 concrete Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002002 slurry Substances 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
- E02D17/20—Securing of slopes or inclines
-
- 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
- E02D17/205—Securing of slopes or inclines with modular blocks, e.g. pre-fabricated
-
- 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
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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)
- Retaining Walls (AREA)
Abstract
The invention relates to the technical field of geotechnical engineering support, in particular to a UHPC (ultra high performance concrete) assembled soil nailing wall structure and a construction method, wherein the UHPC assembled soil nailing wall is formed by assembling a plurality of soil nailing anchor rods and UHPC prefabricated panels; the soil nail anchor rod and the UHPC prefabricated panel are mutually fixed through the combination of the backing plate and the fixing bolt; and the UHPC prefabricated panels which are adjacent in the transverse and longitudinal directions are sequentially sleeved through a horizontal metal connecting piece and a vertical metal connecting piece respectively. The invention has simple and reasonable structure, can reinforce the slope body in time and can effectively reduce the deformation of the slope body. The UHPC prefabricated panel can be prefabricated and maintained in an industrial manner according to design requirements, and a soil nail anchor rod part is constructed after the UHPC prefabricated panel is installed and fixed on site, so that the construction cost can be reduced, the UHPC prefabricated panel is more environment-friendly, the construction period is shortened, and the construction is more convenient.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering support, in particular to a UHPC (ultra high performance concrete) assembled soil nailing wall structure and a construction method.
Background
The landform and the landform of China are various, the relief of the landform is large, the foundation construction is also rapidly promoted along with the development of the economic society, and the construction of various engineering facilities in mountainous areas and hilly areas is gradually increased, such as newly-built roads and railways of various levels, large-scale reservoirs, mineral resource exploitation and the like. Along with the increase of engineering construction and human activities, various types of side slope disasters also occur, particularly in mountainous areas with abundant rainfall, the side slope disasters are more frequent, property loss and casualties caused by side slope accidents are also serious, and meanwhile landslides can influence the operation of roads and railways, so that engineering reinforcement treatment needs to be carried out on a slope body in an unstable state.
Due to the common soil nailing wall supporting structure, during slope construction, slope reinforcing mesh sheets are fixed after soil nailing and connected with soil nails and the like, then a spray anchor machine is adopted to spray concrete, and machines such as a dry spraying machine, a large-scale air compressor and the like are required to be equipped during construction. The dry spraying machine is adopted for operation, the used machines are relatively small, but the used raw materials are cement, sand and stones in bulk, dust pollution on a construction site is serious, when environment-friendly wet spraying is adopted, the equipment is large, the used concrete needs to be conveyed by a concrete tank truck, the volume and the weight are large, when the slope height is high, the site is small, or the traffic is inconvenient, the equipment is inconvenient to use, and the dry spraying machine is difficult to be applied to supporting engineering with complicated site conditions. And the field construction period is long, the field management difficulty is large, and the quality is difficult to ensure.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a UHPC assembled soil nailing wall structure and a construction method thereof, and the purposes of convenient construction, green and safety are achieved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a UHPC assembled soil nailing wall structure, UHPC assembled soil nailing wall is laid in slope face 1 of side slope, its characterized in that: the UHPC assembled soil nailing wall is formed by assembling a plurality of soil nailing anchor rods 2 and UHPC prefabricated panels 3;
the soil nail anchor rod 2 and the UHPC prefabricated panel 3 are mutually fixed through the combination of a backing plate 5 and a fixing bolt 6;
the UHPC prefabricated panels 3 which are adjacent in the transverse and longitudinal directions are sequentially sleeved through a horizontal metal connecting piece 9 and a vertical metal connecting piece 10 respectively.
The soil nail anchor rod 2 is composed of a grouting body 7 and a reinforcing steel bar 8, the grouting body 7 is coated on the reinforcing steel bar 8 in a grouting mode, and cement slurry used by the grouting body 7 comprises cement, fine aggregate, a water reducing agent, water and an expanding agent.
The UHPC prefabricated panel 3 is divided into a standard panel, an end head panel and a heteromorphic panel; two or more groups of horizontal metal connecting pieces 9 and vertical metal connecting pieces 10 are respectively arranged on the two symmetrical sides of the standard panel; two or more groups of horizontal metal connecting pieces 9 are arranged on the transverse side of the end panel, and a group of vertical metal connecting pieces 10 are arranged on the vertical side; two or more groups of horizontal metal connecting pieces 9 and vertical metal connecting pieces 10 are respectively arranged on two symmetrical sides of the irregular surface plate, and the UHPC prefabricated panel 3 of the irregular surface plate is prefabricated according to the terrain.
The UHPC prefabricated panel 3 is provided with one or more groups of backing plates 5 and fixing bolts 6.
The UHPC prefabricated panel 3 is provided with a notch, a mounting hole 11 is arranged in the notch, and the fixing bolt 6 penetrates through the backing plate 5 and the mounting hole 11 to be mutually mounted and fixed with the soil nail anchor rod 2.
The notch on the UHPC prefabricated panel 3 is sealed and covered by an anchor sealing cover plate 4.
The UHPC prefabricated panel 3 is provided with a drain hole 12.
And the notch position on the UHPC prefabricated panel 3, the horizontal metal connecting piece 9 and the vertical metal connecting piece 10 are all provided with reinforcing steel bars.
Another object of the present invention is to provide a method for constructing a UHPC fabricated soil nailing wall structure, comprising:
firstly, excavating side slope soil bodies in a layered manner from top to bottom according to geotechnical engineering design, excavating the soil body of the top level side slope surface 1 at first, executing the size according to the design, and then leveling the side slope surface 1 of the first layer of side slope;
uniformly arranging holes of all rows of poured soil nail anchor rods on the slope surface of the first layer of side slope at intervals along the horizontal direction, placing reinforcing steel bars 8 in the holes and pouring a grouting body 7, wherein the end part of each reinforcing steel bar 8 is exposed out of the slope surface of the side slope by 200-300 mm; the center of the soil nail anchor rod hole of the slope surface 1 and the linear slant length of the slope bottom of the slope are matched with the selected panel, and the distance between two adjacent soil nail anchor rod holes is matched with the length of the selected panel;
thirdly, fixing the UHPC prefabricated panels on the slope surface 1 of the side slope one by one in a layered manner along the horizontal direction, connecting two adjacent UHPC prefabricated panels through a horizontal metal connecting piece 9 and a vertical metal connecting piece 10, using a special-shaped plate or an end plate at the end part of the slope surface, and fixing the end part of a soil nail anchor rod with the UHPC prefabricated panels 3 through a base plate 5 by using a fixing bolt 6;
fourthly, the quality of the soil nail anchor rod 2 and the UHPC prefabricated panel 3 of the side slope is checked after the installation, and then an anchor sealing cover plate 4 is installed;
and fifthly, circularly constructing all levels of soil nail anchor rods 2 and UHPC prefabricated panels 3 to the bottom of the slope in sequence downwards until the protection construction of the whole slope surface 1 of the slope is completed.
The invention has the beneficial effects that: the prefabricated panel of the UHPC assembled soil nail wall is prefabricated and poured by adopting the ultra-high performance concrete, the holes are reserved on the panel and used for installing the reinforcing steel bars for fixing the soil nail anchor rods, the quality of the panel can be greatly reduced by adopting the ultra-high performance concrete, the panel is only 1/3-1/5 of the quality of common concrete, the panel is convenient to transport and hoist and can be installed on a construction site, the construction is convenient, green and safe, the site pollution is greatly reduced, and the durability is better.
The construction method of the UHPC assembled soil nail wall of the invention uses the UHPC prefabricated panel and grouting to form the soil nail anchor rod and the nut, and connects the slope body and the panel together to form a whole, the structure is simple and efficient, the construction method of the invention reduces the use of large machines and tools, does not use discrete cement, stones and sand, reduces dust pollution, is safe and convenient for construction, and is convenient for construction and management of complex projects.
Drawings
FIG. 1 is a sectional view of a UHPC fabricated soil nailing wall structure;
FIG. 2 is a schematic structural view of a UHPC fabricated soil nailing wall;
FIG. 3 is a drawing I of a standard panel of a UHPC prefabricated panel;
FIG. 4 is a diagram II of a standard panel of a UHPC prefabricated panel;
FIG. 5 is a third view of a standard panel of a UHPC prefabricated panel;
FIG. 6 is a first view of an end panel of the UHPC prefabricated panel;
FIG. 7 is a second view of an end panel of the UHPC prefabricated panel;
FIG. 8 is a third view of an end panel of the UHPC prefabricated panel;
FIG. 9 is a first drawing of a cross section of a UHPC prefabricated panel;
FIG. 10 is a second drawing of a cross section of a UHPC prefabricated panel;
FIG. 11 is a third drawing of a cross section of a UHPC prefabricated panel;
shown in the figure: slope surface 1, soil nail anchor rod 2, UHPC prefabricated panel 3, anchor sealing cover plate 4, backing plate 5, fixing bolt 6, grouting 7, reinforcing steel bar 8, horizontal metal connecting piece 9, vertical metal connecting piece 10, mounting hole 11, wash port 12.
Detailed Description
The technical scheme of the invention is further explained by specific embodiments in the following with the accompanying drawings:
example 1
The invention provides a UHPC assembled soil nailing wall structure and a construction method thereof, comprising a soil nailing anchor rod 2 arranged on a slope surface 1 and a UHPC prefabricated panel 3 arranged on the slope surface 1.
The soil nail anchor rods 2 are arranged in rows and columns according to the height of the side slope. The soil nail anchor rod 2 is formed by grouting reinforcing steel bars and comprises reinforcing steel bars 7 and a grouting body 8, and cement paste used by the grouting body 8 comprises cement, fine aggregate, a water reducing agent, water and an expanding agent.
The end of each soil nail anchor rod is fixed with the UHPC prefabricated panel 3 through a fixing bolt 6 and a backing plate 5. The prefabricated panel 3 is provided with a notch, a mounting hole 11 is arranged in the notch, and the fixing bolt 6 penetrates through the backing plate 5, penetrates through the mounting hole 11 and is fixed with the soil nail anchor rod 2. The UHPC prefabricated panel 3 is prefabricated and maintained by ultra-high performance concrete in a factory, and the compressive strength and the tensile strength of the ultra-high performance concrete are 120-160 MPa and 4-6 MPa respectively.
The UHPC prefabricated panels 3 which are adjacent in the transverse and longitudinal directions are sequentially sleeved through a horizontal metal connecting piece 9 and a vertical metal connecting piece 10 respectively. Horizontal metal connecting pieces 9 are pre-embedded in each UHPC prefabricated panel 3, the distance between every two adjacent horizontal metal connecting pieces 9 is 600-800mm, and the thickness of each horizontal metal connecting piece 9 is 2-6 mm. Vertical metal connectors 10 are pre-embedded in each UHPC prefabricated panel 3, the distance between every two adjacent vertical metal connectors 10 is 1000-1200mm, and the thickness of each vertical metal connector 10 is 2-6 mm.
After the soil nail anchor rod 2 and the UHPC prefabricated panel 3 are mutually installed and fixed, an anchor sealing cover plate 4 is packaged at the notch position of the UHPC prefabricated panel 3. The anchor sealing cover plate 4 is made of the same material as the UHPC prefabricated panel 3, the external dimension is matched with the dimension of the notch, and the thickness is 30-60 mm.
The construction method of the UHPC assembled soil nailing wall comprises the following steps:
firstly, excavating side slope soil bodies in a layered manner from top to bottom according to geotechnical engineering design, excavating the soil body of the top level side slope surface 1 at first, executing the size according to the design, and then leveling the side slope surface 1 of the first layer of side slope;
uniformly arranging holes of all rows of poured soil nail anchor rods on the slope surface of the first layer of side slope at intervals along the horizontal direction, placing reinforcing steel bars 8 in the holes and pouring a grouting body 7, wherein the end part of each reinforcing steel bar 8 is exposed out of the slope surface of the side slope by 200-300 mm; the center of the soil nail anchor rod hole of the slope surface 1 and the linear slant length of the slope bottom of the slope are matched with the selected panel, and the distance between two adjacent soil nail anchor rod holes is matched with the length of the selected panel;
thirdly, fixing the UHPC prefabricated panels on the slope surface 1 of the side slope one by one in a layered manner along the horizontal direction, connecting two adjacent UHPC prefabricated panels through a horizontal metal connecting piece 9 and a vertical metal connecting piece 10, using a special-shaped plate or an end plate at the end part of the slope surface, and fixing the end part of a soil nail anchor rod with the UHPC prefabricated panels 3 through a base plate 5 by using a fixing bolt 6;
fourthly, the quality of the soil nail anchor rod 2 and the UHPC prefabricated panel 3 of the side slope is checked after the installation, and then an anchor sealing cover plate 4 is installed;
and fifthly, circularly constructing all levels of soil nail anchor rods 2 and UHPC prefabricated panels 3 to the bottom of the slope in sequence downwards until the protection construction of the whole slope surface 1 of the slope is completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a UHPC assembled soil nailing wall structure, UHPC assembled soil nailing wall is laid in the slope face of side slope, its characterized in that: the UHPC assembled soil nailing wall is formed by assembling a plurality of soil nailing anchor rods and UHPC prefabricated panels;
the soil nail anchor rod and the UHPC prefabricated panel are mutually fixed through the combination of the backing plate and the fixing bolt;
and the UHPC prefabricated panels which are adjacent in the transverse and longitudinal directions are sequentially sleeved through a horizontal metal connecting piece and a vertical metal connecting piece respectively.
2. A UHPC fabricated soil nailing wall construction according to claim 1 wherein: the soil nail anchor rod is composed of a grouting body and a steel bar, the grouting body is coated on the steel bar in a grouting mode, and cement paste used for the grouting body comprises cement, fine aggregate, a water reducing agent, water and an expanding agent.
3. A UHPC fabricated soil nailing wall construction according to claim 1 wherein: the UHPC prefabricated panel is divided into a standard panel, an end head panel and a heteromorphic panel; two or more groups of horizontal metal connecting pieces and vertical metal connecting pieces are respectively arranged on the two symmetrical sides of the standard panel; two or more groups of horizontal metal connecting pieces are arranged on the transverse side of the end panel, and a group of vertical metal connecting pieces are arranged on the vertical side of the end panel; two or more groups of horizontal metal connecting pieces and vertical metal connecting pieces are respectively arranged on two symmetrical sides of the irregular surface plate, and the UHPC prefabricated panel of the irregular surface plate is prefabricated according to the terrain.
4. A UHPC fabricated soil nailing wall construction according to claim 3 wherein: the UHPC prefabricated panel is provided with one group or more than one group of combination of backing plates and fixing bolts.
5. A UHPC fabricated soil nailing wall construction according to claim 4 wherein: the UHPC prefabricated panel is provided with a notch, a mounting hole is formed in the notch, and a fixing bolt penetrates through the base plate and the mounting hole to be mutually mounted and fixed with the soil nail anchor rod.
6. A UHPC fabricated soil nailing wall construction according to claim 5 wherein: and the notch on the UHPC prefabricated panel is sealed and covered by an anchor sealing cover plate.
7. A UHPC fabricated soil nailing wall construction according to claim 5 wherein: and a water drainage hole is formed in the UHPC prefabricated panel.
8. A UHPC fabricated soil nailing wall construction of claim 7 wherein: and the notch position on the UHPC prefabricated panel, the horizontal metal connecting piece and the vertical metal connecting piece are all provided with reinforcing steel bars.
9. A method of constructing a UHPC fabricated soil nailing wall construction as claimed in any one of claims 1 to 8, comprising: s1, excavating side slope soil bodies layer by layer from top to bottom according to geotechnical engineering design, excavating the top side slope soil body first, and then leveling the side slope surface of the first layer of side slope;
s2, uniformly arranging holes of all rows of poured soil nail anchor rods on the slope surface of the first layer of side slope at intervals along the horizontal direction, placing reinforcing steel bars in the holes and pouring grout;
s3, fixing UHPC prefabricated panels on a slope surface of a side slope one by one in a layered manner along the horizontal direction, connecting two adjacent UHPC prefabricated panels through a horizontal metal connecting piece and a vertical metal connecting piece, using a special-shaped plate or an end plate at the end part of the slope surface, and fixing the end part of a soil nail anchor rod with the prefabricated panels through a backing plate by using a fixing bolt;
s4, finishing the quality inspection after the installation of the soil nail anchor rod and the UHPC prefabricated panel of the side slope, and installing an anchor sealing cover plate;
and S5, sequentially and circularly constructing all levels of soil nail anchor rods and UHPC prefabricated panels to the bottom of the side slope downwards until the protection construction of the whole side slope surface is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093363.9A CN114232656A (en) | 2022-01-26 | 2022-01-26 | UHPC (ultra high performance polycarbonate) assembled soil nailing wall structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093363.9A CN114232656A (en) | 2022-01-26 | 2022-01-26 | UHPC (ultra high performance polycarbonate) assembled soil nailing wall structure and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108978A (en) * | 2021-12-03 | 2022-03-01 | 四川华构住宅工业有限公司 | Novel ultra-thin heat-preservation outer-hanging wallboard made of UHPC and construction process of novel ultra-thin heat-preservation outer-hanging wallboard |
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| KR20050110307A (en) * | 2004-05-18 | 2005-11-23 | 주식회사 아이콘텍 | Underground excavation method of which use recycling plastic pre-fabrication panel and pre-tension soil-nail or post-tension soil-nail and it's structure |
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| CN111851518A (en) * | 2020-07-08 | 2020-10-30 | 李思佳 | Assembled soil nailing wall structure and construction method |
| CN217378938U (en) * | 2022-01-26 | 2022-09-06 | 甘肃省交通规划勘察设计院股份有限公司 | UHPC assembled soil nail wall structure |
-
2022
- 2022-01-26 CN CN202210093363.9A patent/CN114232656A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050110307A (en) * | 2004-05-18 | 2005-11-23 | 주식회사 아이콘텍 | Underground excavation method of which use recycling plastic pre-fabrication panel and pre-tension soil-nail or post-tension soil-nail and it's structure |
| CN101122132A (en) * | 2007-09-03 | 2008-02-13 | 中铁建设集团有限公司 | Demountable composite material face plate brad supporting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114108978A (en) * | 2021-12-03 | 2022-03-01 | 四川华构住宅工业有限公司 | Novel ultra-thin heat-preservation outer-hanging wallboard made of UHPC and construction process of novel ultra-thin heat-preservation outer-hanging wallboard |
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