CN112483133A - Steel bar grating connecting structure for primary support structure of arch-connected underground excavated pipe gallery and construction method - Google Patents
Steel bar grating connecting structure for primary support structure of arch-connected underground excavated pipe gallery and construction method Download PDFInfo
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- CN112483133A CN112483133A CN202011348381.4A CN202011348381A CN112483133A CN 112483133 A CN112483133 A CN 112483133A CN 202011348381 A CN202011348381 A CN 202011348381A CN 112483133 A CN112483133 A CN 112483133A
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- steel bar
- steel
- bar grating
- excavation
- arch
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 144
- 239000010959 steel Substances 0.000 title claims abstract description 144
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 238000009412 basement excavation Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a steel bar grating connecting structure for a primary support structure of a combined arch underground excavation pipe gallery and a construction method, wherein steel plates are arranged at the connecting positions of the steel bar gratings of the primary support structure of two adjacent bins and outside the steel bar gratings of the pre-excavated bins in advance to serve as pre-embedded connecting pieces, the steel plates are welded with main ribs of the steel bar gratings, the planes of the steel plates are vertical to the connecting direction, anchor bars are arranged at the back parts, reserved holes and high-strength bolts are symmetrically arranged on the steel plates, one end heads of the bolts are flush with the inner sides of the steel plates, the other sides of the bolts extend outwards to be reserved for connecting plates of the steel bar gratings of the adjacent bins, two angle steels are arranged at the end parts of the co-constructed connecting structure, the angle steels correspond to the connecting positions of the high-strength bolts, the bolt holes are reserved for fast connecting the angle steels and the reserved connecting pieces of the steel plates, the method reduces the influence of excavation on the soil body, and has wide development and application prospect in the arch-connected subsurface excavation construction.
Description
Technical Field
The invention relates to a connecting structure for a steel bar grating of a primary support structure of an underground excavated pipe gallery, in particular to a connecting structure for the steel bar grating of the primary support structure of the underground excavated pipe gallery in a multi-arch section form, which is convenient for connecting the steel bar gratings of adjacent underground excavated bins at a common primary support intermediate wall.
Background
The comprehensive pipe gallery is generally designed into a multi-cabin co-construction form such as a water and telecommunications cabin, an electric power cabin, a fuel gas cabin and the like according to the use function, a corresponding underground excavation section generally adopts a primary support arch structure form, adjacent cabins are staggered during excavation, and by taking the triple arch structure form as an example, the construction is generally mostly carried out by adopting a middle tunnel method, namely after the middle tunnel is excavated and supported for a certain length, side tunnels on two sides are excavated and supported symmetrically, and tunnel faces on two sides are always longitudinally away from a tunnel face of the middle tunnel for a certain distance. The side wall of the primary support structure of the primary bin is used as the side wall of the adjacent bin for subsequent excavation to form a whole, after the installation of the reinforcing steel bar grating of the primary support structure of the primary bin is completed, the primary concrete spraying construction is carried out, the primary support structure of the primary bin is sealed to form a ring, after the adjacent bin for subsequent excavation is excavated to the corresponding position, the reinforcing steel bar grating of the primary support is connected with the reinforcing steel bar grating of the primary bin at the axillary corner position of the vault and the bottom of the side wall to form a whole closed structure, then the primary concrete spraying construction of the adjacent bin is carried out, and thus, the arch-connected section structure is wholly sealed to form a. The steel bar grating co-structure connecting position is provided with a connecting plate as a connecting facility, the connecting plate is welded with the steel bar grating and is provided with a bolt hole, and the connecting plates on two sides are connected by high-strength bolts to enable the steel bar grating of the adjacent bins to be connected into a closed whole.
After the primary support of each steel bar grating in the prior bin is sprayed with concrete, the concrete covers the connecting plate on the reserved side, the covered reserved connecting plate needs to be chiseled after adjacent bins are excavated to corresponding positions, the reserved hole and the bolt installation operation space on the rear side of the connecting plate are cleaned, otherwise, the bolt installation work cannot be carried out, the chiseling and cleaning work is complicated and slow in progress, the bolt reserved hole cleaning quality is not easy to guarantee, the sealing and ring forming efficiency of the whole primary support structure is directly influenced, and the construction progress and quality of the underground excavation project are influenced to a certain extent.
Disclosure of Invention
The invention aims to provide a connecting plate design convenient for a primary support structure of an arch-connected underground excavation pipe gallery to form a steel bar grating at the joint of two adjacent bins, so as to solve the problem that the construction treatment of the steel bar grating at the joint of the two bins in the prior art is difficult.
The invention realizes the purpose through the following technical scheme:
a construction method of a steel bar grating connecting structure for a primary support structure of a multi-arch underground excavation pipe gallery is characterized in that a steel bar grating connecting common structure point C at a top arch foot is a top connecting structure of a primary steel bar grating A of an advanced excavation cabin and a primary steel bar grating B of a subsequent excavation cabin, and a steel bar grating connecting common structure point D at a bottom plate is a bottom connecting structure of the primary steel bar grating A of the advanced excavation cabin and the primary steel bar grating B of the subsequent excavation cabin.
S1 when the upper step of the underground excavation pipe gallery is excavated, steel bar grids at the arch foot of the top are connected with a common construction point C, a steel plate 2 serving as a pre-embedded connecting piece is arranged on the outer side of a primary steel bar grid A of the pre-excavation cabin, and the steel plate 2 is arranged along the tangential direction of an arc-shaped steel bar grid main bar 1 on the outer side of the arch part of the primary steel bar grid A of the pre-excavation cabin and is vertical to the connecting axis; four bolt preformed holes 5 are symmetrically arranged on the steel plate 2; the end head of one side of the high-strength bolt 3 is flush with the inner side of the steel plate 2, and the other side of the high-strength bolt extends outwards for reservation and is to be connected with a primary support steel bar grating B of a subsequent excavation bin; follow-up excavation storehouse is just propped up steel bar grating B and is connected the congruent point C tip at top arch foot department steel bar grating and set up two angle steel 4 to weld on follow-up excavation storehouse is just propped up steel bar grating B's steel bar grating owner muscle 1, angle steel 4 corresponds the hookup location of high strength bolt 3 and sets up bolt preformed hole 5, is connected angle steel 4 and steel sheet 2 through high strength bolt 3, and is fixed firmly with nut 6 in the excavation side of back.
S2 when the underground pipe gallery is excavated, connecting the steel bar grating at the bottom plate to a common structure point D, arranging a steel plate 2 as an embedded connecting piece on the outer side of a primary support steel bar grating A of the excavation bin in advance, and welding the steel plate 2 and a main steel bar 1 of the steel bar grating; four bolt preformed holes 5 are symmetrically arranged on the steel plate 2; the end head of one side of the high-strength bolt 3 is flush with the inner side of the steel plate 2, and the other side of the high-strength bolt extends outwards for reservation and is to be connected with a primary support steel bar grating B of a subsequent excavation bin; follow-up excavation storehouse first support steel bar grating B connects at bottom plate department steel bar grating and constructs a point D tip setting two angle steel 4 altogether to weld on follow-up excavation storehouse first support steel bar grating B's steel bar grating owner muscle 1, angle steel 4 corresponds the hookup location department of high strength bolt 3 and has reserved bolt hole 5, is connected angle steel 4 and the steel sheet 2 of reserving the connecting piece through high strength bolt 3, and it is fixed firm with nut 6 to excavate the side after.
Preferably, the high-strength bolt 3 is welded in the bolt preformed hole 5 by adopting a plug welding process so as to improve the strength of the joint of the high-strength bolt 3 and the angle steel 4.
Preferably, the high-strength bolts 3 which are subjected to plug welding are reserved on the steel plates 2 of the pre-excavated bins and are perpendicular to the connecting plates, so that the corresponding angle steel 4 is conveniently sleeved in a reserved hole.
Preferably, the four reserved high-strength bolts 3 on the angle steel 4 are symmetrically arranged, and the arrangement positions of the angle steel 4 completely correspond to the hole positions of the adjacent bin connecting plates, so that the installation is facilitated.
Preferably, four anchoring steel bars are arranged on the back of the steel plate 2 to reinforce the connection strength of the arc-shaped part;
compared with the prior art, the method has the advantages of convenience and quickness in construction, and the like, can effectively improve the construction progress, enables adjacent bins and integral co-constructed primary supports to be quickly sealed into a ring, reduces the influence of excavation on the soil body, and has wide development and application prospects in arch-connected subsurface excavation construction. The reinforcing bar grid connecting plate for the primary support structure of the arch-linked underground excavated pipe gallery can effectively ensure the connection efficiency and the connection strength of the primary support reinforcing bar grid of the adjacent chambers of the pipe gallery, avoid the need of additional chiseling treatment on the connection position due to the covering of the connection hole position by the construction of the primary support sprayed concrete of the pre-excavated chamber, save the construction time and improve the closing efficiency of the whole primary support structure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of primary support of a three-linked arch pipe gallery.
Figure 2 is a front view of the invention.
Fig. 3 is a cross-sectional view of the present invention.
Fig. 4 is a front view of the application of the present invention.
Fig. 5 is a cross-sectional view of the application of the present invention.
Wherein: a is a steel bar grating for the first excavated bin, B is a steel bar grating for the first excavated bin, C is a steel bar grating connection co-construction point at an arch foot, and D is a steel bar grating connection co-construction point at a bottom plate; the steel bar grating is characterized in that the steel bar grating main rib 1, the steel plate 2, the high-strength bolt 3, the angle steel 4, the bolt preformed hole 5 and the nut 6 are arranged.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following clearly and completely describes the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, and the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
According to the drawings 1-5, when in use, when the primary support structure of the arch-linked underground excavation pipe gallery is constructed, a steel plate 2 is arranged at the position where a main reinforcement 1 of a steel bar grating of a pre-excavation bin and an adjacent bin are connected together, the steel plate 2 is provided with four preformed holes, one ends of four high-strength bolts 3 are welded in the preformed holes by adopting a plug welding process, and the steel plate 2 is firmly connected to complete the installation of the steel bar grating; when the adjacent storehouse of follow-up excavation is to constituting hookup location altogether, two firm angle steel 4 of 1 connection end welding of the bar grating owner muscle in the adjacent storehouse of follow-up excavation are provided with four bolt preformed holes 5 on the angle steel 2, pass the bolt preformed hole 5 on the angle steel 4 with four high strength bolt 3's the other end to screw up with nut 6, make the firm connection of excavation storehouse in advance and the adjacent storehouse bar grating of follow-up excavation, reach quick connection, confined effect.
And after the reinforcing steel bar grating is installed, performing concrete spraying construction, and taking appropriate protection measures such as wearing a rubber protective cap on the exposed screw head of the high-strength bolt 3 during construction.
Claims (5)
1. The utility model provides a execute as method for alling oneself with steel bar grating connection structure of encircleing and secretly digging piping lane primary support structure which characterized in that: the steel bar grating connecting common structure point C at the top arch foot is a top connecting structure of a first steel bar grating A of the pre-excavation cabin and a first steel bar grating B of the subsequent excavation cabin, and the steel bar grating connecting common structure point D at the bottom base plate is a bottom connecting structure of the first steel bar grating A of the pre-excavation cabin and the first steel bar grating B of the subsequent excavation cabin;
s1 when the upper step of the underground excavation pipe gallery is excavated, steel bar grids at the arch foot of the top are connected with a common construction point C, a steel plate serving as an embedded connecting piece is arranged on the outer side of a primary steel bar grid A of the pre-excavation cabin, and the steel plate is arranged along the tangential direction of an arc-shaped main steel bar of the outer side of the arch part of the primary steel bar grid A of the pre-excavation cabin and is vertical to a connecting axis; four bolt preformed holes are symmetrically arranged on the steel plate; the end head of one side of the high-strength bolt is flush with the inner side of the steel plate, and the other side of the high-strength bolt extends outwards for reservation and is to be connected with a primary steel bar grid B of a subsequent excavation bin; two pieces of angle steel are arranged at the end part of a steel bar grating connecting common structure point C at the top arch foot of a primary steel bar grating B of a subsequent excavation bin and are welded on a main steel bar of the steel bar grating of the primary steel bar grating B of the subsequent excavation bin, bolt preformed holes are arranged at the connecting positions of the angle steel corresponding to high-strength bolts, the angle steel is connected with a steel plate through the high-strength bolts, and the rear excavation side is firmly fixed by nuts;
s2 when the underground pipe gallery is excavated, connecting the steel bar grating at the bottom plate to a common structure point D, arranging a steel plate as an embedded connecting piece on the outer side of the primary support steel bar grating A of the excavation bin in advance, and welding the steel plate and the main steel bars of the steel bar grating; four bolt preformed holes are symmetrically arranged on the steel plate; the end head of one side of the high-strength bolt is flush with the inner side of the steel plate, and the other side of the high-strength bolt extends outwards for reservation and is to be connected with a primary steel bar grid B of a subsequent excavation bin; the steel bar grating connecting co-construction point D end part of the steel bar grating B at the bottom plate of the follow-up excavation bin is provided with two pieces of angle steel, the angle steel is welded on a steel bar grating main rib of the follow-up excavation bin steel bar grating B, a bolt preformed hole is reserved at the connecting position of the angle steel corresponding to the high-strength bolt, the angle steel is connected with a steel plate reserved with a connecting piece through the high-strength bolt, and the angle steel is fixed firmly by a nut at the back excavation side.
2. The method for constructing a steel bar grating connection structure for an arch-linked underground pipe gallery primary support structure according to the claim, wherein the method comprises the following steps: the high-strength bolt is welded in the bolt preformed hole by adopting a plug welding process so as to improve the strength of the joint of the high-strength bolt and the angle steel.
3. The method for constructing a steel bar grating connection structure for an arch-linked underground pipe gallery primary support structure according to the claim, wherein the method comprises the following steps: the high-strength bolt of the pre-arranged plug welding of the steel plate of the pre-excavated bin is perpendicular to the connecting plate, so that the corresponding angle steel pre-arranged hole can be conveniently sleeved.
4. The method for constructing a steel bar grating connection structure for an arch-linked underground pipe gallery primary support structure according to the claim, wherein the method comprises the following steps: the four reserved high-strength bolts on the angle steel are symmetrically arranged, and the arrangement positions of the angle steel completely correspond to the hole positions of the adjacent bin connecting plates.
5. The method for constructing a steel bar grating connection structure for an arch-linked underground pipe gallery primary support structure according to the claim, wherein the method comprises the following steps: the back of the steel plate is provided with four anchoring steel bars to reinforce the connection strength of the arc-shaped part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011348381.4A CN112483133A (en) | 2020-11-26 | 2020-11-26 | Steel bar grating connecting structure for primary support structure of arch-connected underground excavated pipe gallery and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011348381.4A CN112483133A (en) | 2020-11-26 | 2020-11-26 | Steel bar grating connecting structure for primary support structure of arch-connected underground excavated pipe gallery and construction method |
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| CN112483133A true CN112483133A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011348381.4A Pending CN112483133A (en) | 2020-11-26 | 2020-11-26 | Steel bar grating connecting structure for primary support structure of arch-connected underground excavated pipe gallery and construction method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000087348A (en) * | 1998-09-11 | 2000-03-28 | Nippon Steel Metal Prod Co Ltd | Steel segment, underground reinforced concrete columnar structure and construction method thereof |
| CN202467864U (en) * | 2012-01-20 | 2012-10-03 | 华铁工程咨询有限责任公司 | Fastening arch initial supporting steel frame connection for excavated metro station |
| CN202851011U (en) * | 2012-10-26 | 2013-04-03 | 中铁二十二局集团第六工程有限公司 | Existing grate and novel grate connecting system in tunnel construction |
| CN104695983A (en) * | 2013-12-09 | 2015-06-10 | 中铁十三局集团有限公司 | Method for welding embedded steel bar welding joints of two end nodes in initial supporting arch |
| CN105484777A (en) * | 2015-05-08 | 2016-04-13 | 中铁隧道勘测设计院有限公司 | Connection structure for pilot tunnel and main body steel arch frame of station constructed by pile-beam-arc method |
| CN205201082U (en) * | 2015-11-06 | 2016-05-04 | 重庆明高机械制造有限公司 | Compress tightly formula anchor clamps |
| CN207934914U (en) * | 2018-01-10 | 2018-10-02 | 中铁二院成都勘察设计研究院有限责任公司 | A kind of connection structure, loopful grid steel frame and tunnel |
| CN208686400U (en) * | 2018-07-27 | 2019-04-02 | 中国电建市政建设集团有限公司 | The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA |
-
2020
- 2020-11-26 CN CN202011348381.4A patent/CN112483133A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000087348A (en) * | 1998-09-11 | 2000-03-28 | Nippon Steel Metal Prod Co Ltd | Steel segment, underground reinforced concrete columnar structure and construction method thereof |
| CN202467864U (en) * | 2012-01-20 | 2012-10-03 | 华铁工程咨询有限责任公司 | Fastening arch initial supporting steel frame connection for excavated metro station |
| CN202851011U (en) * | 2012-10-26 | 2013-04-03 | 中铁二十二局集团第六工程有限公司 | Existing grate and novel grate connecting system in tunnel construction |
| CN104695983A (en) * | 2013-12-09 | 2015-06-10 | 中铁十三局集团有限公司 | Method for welding embedded steel bar welding joints of two end nodes in initial supporting arch |
| CN105484777A (en) * | 2015-05-08 | 2016-04-13 | 中铁隧道勘测设计院有限公司 | Connection structure for pilot tunnel and main body steel arch frame of station constructed by pile-beam-arc method |
| CN205201082U (en) * | 2015-11-06 | 2016-05-04 | 重庆明高机械制造有限公司 | Compress tightly formula anchor clamps |
| CN207934914U (en) * | 2018-01-10 | 2018-10-02 | 中铁二院成都勘察设计研究院有限责任公司 | A kind of connection structure, loopful grid steel frame and tunnel |
| CN208686400U (en) * | 2018-07-27 | 2019-04-02 | 中国电建市政建设集团有限公司 | The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA |
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Application publication date: 20210312 |
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