CN108951647A - Construction method for supporting is excavated in hole in the hole of open trench tunnel - Google Patents
Construction method for supporting is excavated in hole in the hole of open trench tunnel Download PDFInfo
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- CN108951647A CN108951647A CN201810790999.2A CN201810790999A CN108951647A CN 108951647 A CN108951647 A CN 108951647A CN 201810790999 A CN201810790999 A CN 201810790999A CN 108951647 A CN108951647 A CN 108951647A
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- hole
- side wall
- steel
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- cheated
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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)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention provides holes in a kind of hole of open trench tunnel to excavate construction method for supporting, comprising the following steps: 1) excavates and form the main foundation pit in tunnel, main foundation pit has main foundation pit bottom；2) building enclosure is applied to the two sidewalls of main foundation pit, wherein the building enclosure of one side wall is applied into default hole at the depth location of hole as the side wall building enclosure for cheating one side wall in hole；3) the first layer earth excavation cheated in the pre-position at main foundation pit bottom is cheated；Set up first of steel purlin and steel pipe support；4) the longitudinal slope for the second layer earthwork cheated in being cheated is excavated, and second steel purlin and steel pipe support are set up；5) the longitudinal slope for the third layer earthwork cheated in being cheated is excavated, and is cheated with being formed in hole；6) first of steel purlin and steel pipe support and second steel purlin and steel pipe support are removed；Template is set up in cheating in hole pours bottom plate, side plate and the top plate that main structure is cheated in hole.
Description
Technical field
The present invention relates to technical field of tunnel construction, and in particular to supporting construction side is excavated in hole in a kind of hole of open trench tunnel
Method.
Background technique
In the mining process of open trench tunnel, the unique foundation pit of excavating depth is commonplace, and supporting construction and method ratio
It is more mature, and in the mining process of " being cheated in hole " foundation pit in the more depth in hole, excavate and method for protecting support still by virtue of experience into
Row design and construction.
Summary of the invention
The object of the present invention is to provide holes in a kind of hole of open trench tunnel to excavate construction method for supporting, improves open trench tunnel
The efficiency of the excavation and supporting cheated in hole reduces geologic risk, easy to promote and utilize.
Construction method for supporting is excavated in hole in the hole of open trench tunnel provided by the invention, comprising the following steps: 1) excavates and formed
The main foundation pit in tunnel, the main foundation pit have main foundation pit bottom；2) building enclosure is applied to the two sidewalls of the main foundation pit, wherein side
The building enclosure of wall is applied into default hole at the depth location of hole using the side wall building enclosure as hole one side wall in the hole；
3) the first layer earth excavation cheated in the hole is carried out in the pre-position at the main foundation pit bottom, in exposed soil while excavation
The side wall of layer carries out just shotcrete support, until excavating to the first predetermined depth；Side wall after first shotcrete support is applied
Make fashioned iron combined bolting and shotcrete；First of steel purlin and steel pipe support are set up between the side wall building enclosure and opposite side wall；
4) the longitudinal slope for carrying out the second layer earthwork cheated in the hole is excavated, and side wall while excavation in exposed soil layer carries out just spray
Concrete support, until excavating to the second predetermined depth；Side wall after first shotcrete support applies fashioned iron combined bolting and shotcrete；?
Second steel purlin and steel pipe support are set up between the side wall building enclosure and opposite side wall；5) it is cheated in the progress hole
Longitudinal slope of the third layer earthwork is excavated, and side wall while excavation in exposed soil layer carries out just shotcrete support, until digging
Pick is cheated at depth location into the default hole, is cheated with being formed in the hole；Side wall after first shotcrete support applies type
Steel combined bolting and shotcrete；The hole bottom cheated in the artificial smooth hole simultaneously applies bottom cushion；And 6) remove first of steel purlin
And steel pipe support；Remove the second steel purlin and steel pipe support；Template is set up in cheating in the hole to pour in the hole
Cheat bottom plate, side plate and the top plate of main structure.
Preferably, first predetermined depth is 1/3 of hole depth in the default hole, second predetermined depth is institute
The gradient for stating 1/3, longitudinal slope that depth is cheated in default hole is 1:1.
Preferably, it includes: after first shotcrete support that fashioned iron combined bolting and shotcrete is applied in step 3), step 4) and step 5)
Side wall on perpendicular to the excavation face at the main foundation pit bottom multiple profile steel frames are installed along side wall；The multiple profile steel frame it
Between install multiple anchor poles；Steel mesh is hung on the multiple anchor pole；And to the multiple profile steel frame and the multiple anchor
The gap gunite concrete of bar and steel mesh.
Preferably, the profile steel frame is I-steel.
Preferably, the multiple profile steel frames of installation include: that longitudinally connected muscle is arranged between every two profile steel frame；With
And it is connected by high-strength bolts the multiple profile steel frame.
Preferably, the multiple profile steel frames of installation further include: in the profile steel frame and the just shotcrete support
In the case that the gap between side wall afterwards is greater than prepsetting gap, after the profile steel frame and the just shotcrete support
Concrete correcting wedge is set between side wall and spray is carried out to the gap gunite concrete and is filled out.
Preferably, it is set up in step 3) and sets up second steel purlin in first of steel purlin and steel pipe support and step 4)
And steel pipe support includes: production steel purlin and steel pipe support；Purlin three is installed in the side wall building enclosure opposite side wall
Angle bracket；The steel purlin is installed on the purlin triangle bracket；In the side wall building enclosure and the steel purlin
Between the steel pipe support is installed；And prestressing force is applied to the steel pipe support.
Preferably, the purlin triangle bracket is made of angle steel, the side wall installation opposite in side wall building enclosure
Purlin triangle bracket includes: that the purlin triangle bracket is fixed on the side wall building enclosure using setscrew is opposite
Side wall on.
Preferably, the installation steel purlin includes: by the fixed steel purlin of flower basket bolt.
Preferably, described that steel pipe support is installed between side wall building enclosure and steel purlin, comprising: by the steel pipe support
One end held out against with the steel purlin, using steel pipe support described in jack pair the other end apply precompression, to be applied is pre-
Other end when pressure reaches preset pressure in the steel pipe support adds locking wedge block and unclamps jack.
Hole excavates construction method for supporting and is first excavated and propped up again using stage excavation in the hole of open trench tunnel provided by the invention
Shield, and when excavating supporting method, improve and cheat digging efficiency and Mining Quality in the hole of open trench tunnel, reduce geology
Risk, it is easy to promote and utilize.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is that main foundation pit and hole in construction method for supporting are excavated in hole in the hole of the open trench tunnel of embodiment according to the present invention
The vertical structure schematic diagram in middle hole.
Description of symbols
1 main 2 side wall building enclosure of foundation pit bottom
3 first of steel purlin and 4 second steel purlin of steel pipe support and steel pipe support
The hole bottom cheated in 5 holes
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
With reference to the accompanying drawing, technical solution in the embodiment of the present invention is described in detail.
The present invention provides cheated in a kind of open trench tunnel hole after construction method for supporting, include the following steps 1) to excavate and form tunnel
Main foundation pit, the main foundation pit have main foundation pit bottom 1；2) building enclosure is applied to the two sidewalls of the main foundation pit, wherein one side wall
Building enclosure applied into default hole at the depth location of hole using as the side wall building enclosure 2 for cheating one side wall in the hole；
3) the first layer earth excavation cheated in the hole is carried out in the pre-position at the main foundation pit bottom 1, exposed while excavation
The side wall of soil layer carries out just shotcrete support, until excavating to the first predetermined depth；Side wall after first shotcrete support
Apply fashioned iron combined bolting and shotcrete；First of steel purlin and steel pipe branch are set up between the side wall building enclosure 2 and opposite side wall
Support 3；4) the longitudinal slope for carrying out the second layer earthwork cheated in the hole is excavated, and side wall while excavation in exposed soil layer carries out
First shotcrete support, until excavating to the second predetermined depth；Side wall after first shotcrete support applies fashioned iron spray anchor branch
Shield；Second steel purlin and steel pipe support 4 are set up between the side wall building enclosure 2 and opposite side wall；5) described in carrying out
Longitudinal slope of the third layer earthwork cheated in hole is excavated, and side wall while excavation in exposed soil layer carries out just pneumatically placed concrete branch
Shield is cheated at depth location into the default hole until excavating, is cheated with being formed in the hole；Side after first shotcrete support
Wall applies fashioned iron combined bolting and shotcrete；The hole bottom 5 cheated in the artificial smooth hole simultaneously applies bottom cushion；And 6) remove described first
Road steel purlin and steel pipe support 3；Remove the second steel purlin and steel pipe support 4；Template is set up in cheating in the hole to pour
Build bottom plate, side plate and the top plate that main structure is cheated in the hole.
According to the technique and scheme of the present invention, as shown in Figure 1, step 1) is cheated in the hole of open trench tunnel excavates supporting construction mistake
Cheng Zhong carries out the excavation of main foundation pit first, arrives main foundation pit bottom 1 until excavating；Step 2) applies the two sidewalls of the main foundation pit
Building enclosure, wherein the building enclosure of one side wall is applied into default hole at the depth location of hole using as the hole side Zhong Keng
The side wall building enclosure 2 of wall before hole is excavated in the hole, i.e., is consolidated the soil body of the hole side Zhong Keng
Fixed, the stability that can be improved the hole structure side soil body in the hole reduces geology to improve the efficiency of excavation and supporting
Risk.
A kind of embodiment according to the present invention, the side wall building enclosure 2 are continuous underground wall structure, and the underground connects
Continuous wall construction hangs steel reinforcement cage, later the casting concrete in deep trouth, to form reinforced concrete by excavating deep trouth in deep trouth
Native diaphragm wall can have the function that intercept water, antiseepage and load-bearing.
According to the technique and scheme of the present invention, step 3) cheat in the hole in the pre-position at the main foundation pit bottom 1
First layer earth excavation, just shotcrete support is carried out in the side wall of exposed soil layer while excavation, until excavating to first
Predetermined depth；Side wall after first shotcrete support applies fashioned iron combined bolting and shotcrete；The side wall building enclosure 2 with it is opposite
First of steel purlin and steel pipe support 3 are set up between side wall；4) the longitudinal slope for carrying out the second layer earthwork cheated in the hole is opened
It digs, just shotcrete support is carried out in the side wall of exposed soil layer while excavation, until excavating to the second predetermined depth；It is sprayed just
Side wall after concrete support applies fashioned iron combined bolting and shotcrete；Is set up between the side wall building enclosure 2 and opposite side wall
Two steel purlins and steel pipe support 4；5) the longitudinal slope for carrying out the third layer earthwork cheated in the hole is excavated, while excavation
The side wall of exposed soil layer carries out just shotcrete support, cheats at depth location until excavating into the default hole, to be formed
It states and is cheated in hole；Side wall after first shotcrete support applies fashioned iron combined bolting and shotcrete；The hole bottom 5 cheated in the artificial smooth hole is simultaneously
Apply bottom cushion.
The method that construction method for supporting uses stage excavation, the pre-determined bit at the main foundation pit bottom 1 are excavated in hole in the hole
Place is set, the excavation cheated in the hole is divided into: first layer earth excavation, the slope excavation of the second layer earthwork and the third layer earthwork
Slope excavate.
Using the method for the supporting when excavating, in the same of the first layer earthwork, the second layer earthwork and third layer excavation of earthwork
When exposed soil layer side wall carry out just shotcrete support, tentatively exposed soil layer is fixed.
Using the method for first excavating supporting again, excavate in first layer earth excavation to the first predetermined depth, it is mixed in first spray
Side wall after solidifying soil supporting applies fashioned iron combined bolting and shotcrete, sets up first between the side wall building enclosure 2 and opposite side wall
Road steel purlin and steel pipe support 3；The longitudinal slope for carrying out the second layer earthwork cheated in the hole is excavated, and is excavated to the second pre- depthkeeping
After degree, the side wall after first shotcrete support applies fashioned iron combined bolting and shotcrete, in the side wall building enclosure 2 and opposite side wall
Between set up second steel purlin and steel pipe support 4；The longitudinal slope for carrying out the third layer earthwork cheated in the hole is excavated, and is excavated
It cheats at depth location in the default hole, is cheated with being formed in the hole；Side wall after first shotcrete support applies fashioned iron
Combined bolting and shotcrete.
A kind of embodiment according to the present invention, it is preferable that first predetermined depth is to cheat depth in the default hole
1/3, second predetermined depth be the default hole in cheat depth 1/3, layer digging ensure that in the hole and cheat structure
Stability in mining process.For example, cheating depth in the default hole is 96 meters, first predetermined depth is 32 meters, institute
Stating the second predetermined depth is 32 meters.
A kind of embodiment according to the present invention, it is preferable that carry out the second layer earthwork cheated in the hole and third layer soil
Longitudinal slope of side is excavated, and the gradient of longitudinal slope is 1:1, and the gradient refers to the bottom width and base height of native wall grade of side slope
Than using the mode that slope is excavated to prevent Tu Bi from caving in, it is ensured that the safety of construction.
According to the technique and scheme of the present invention, fashioned iron combined bolting and shotcrete is applied in step 3), step 4) and step 5) includes: first
Excavation face on side wall after shotcrete support perpendicular to the main foundation pit bottom 1 installs multiple profile steel frames along side wall；Institute
It states and installs multiple anchor poles between multiple profile steel frames；Steel mesh is hung on the multiple anchor pole；And to the multiple fashioned iron steel
The gap gunite concrete of frame and the multiple anchor pole and steel mesh, so that interval is filled by gunite concrete, it is the multiple
Profile steel frame and the multiple anchor pole and steel mesh and the common stress of the concrete of injection, ensure that the stability of the soil body.
A kind of embodiment according to the present invention, it is preferable that the profile steel frame is I-steel.
A kind of embodiment according to the present invention, it is preferable that the multiple profile steel frames of installation include: in every two fashioned iron
Longitudinally connected muscle is set between steelframe；And it is connected by high-strength bolts the multiple profile steel frame, the dowel and institute
It states profile steel frame to connect by welding, to increase the overall stability of the multiple profile steel frame.
A kind of embodiment according to the present invention, it is preferable that the multiple profile steel frames of installation further include: in the fashioned iron
In the case that the gap between side wall after steelframe and the just shotcrete support is greater than prepsetting gap, in the profile steel frame
Concrete correcting wedge is set between the side wall after the just shotcrete support and spray is carried out to the gap gunite concrete and is filled out,
To enhance the effect of supporting.
A kind of embodiment according to the present invention, the multiple profile steel frames of installation further include, in each fashioned iron steel
It is respectively provided with lock foot anchor tube at the arch springing position of frame, for consolidating the profile steel frame, prevents the profile steel frame arch springing arch from sticking up, and
So that the profile steel frame has from ability to bear.
A kind of embodiment according to the present invention, drilling anchor rod aperture between the multiple profile steel frame, multiple anchor poles are filled
If entering in the bolthole, the cement grouting into the bolthole.
A kind of embodiment according to the present invention hangs steel mesh on the multiple anchor pole, and the steel mesh is according to just
The undulated laying of the reality in pneumatically placed concrete face, and 30 millimeters are not preferably greater than with by spray plane gap.Steel mesh and steel mesh, steel mesh
With the anchor pole, steel mesh with the profile steel frame by being welded together, so that the steel mesh is in concrete ejection
Shi Buyi shakes, and ensure that the quality of supporting.
According to the technique and scheme of the present invention, it is set up in first of steel purlin and steel pipe support 3 and step 4) in step 3)
Setting up second steel purlin and steel pipe support 4 includes: production steel purlin and steel pipe support；In 2 phase of side wall building enclosure
Pair side wall install purlin triangle bracket；The steel purlin is installed on the purlin triangle bracket；It is enclosed in the side wall
The steel pipe support is installed between protection structure 2 and the steel purlin；And prestressing force is applied to the steel pipe support, so that described
Steel pipe support cross-brace is between the side wall building enclosure 2 and opposite side wall, so that the side wall building enclosure 2 and phase
Pair side wall be unlikely to deform.
A kind of embodiment according to the present invention, it is preferable that the purlin triangle bracket is made of angle steel, described in side
The opposite side wall installation purlin triangle bracket of wall building enclosure 2 includes: using setscrew by the purlin triangle bracket
It is fixed on the opposite side wall of the side wall building enclosure 2.
A kind of embodiment according to the present invention, it is preferable that the installation steel purlin includes: by the fixed institute of flower basket bolt
Steel purlin is stated, to increase the firmness of the steel purlin installation, prevents the steel purlin from falling.
A kind of embodiment according to the present invention, it is preferable that described to install steel between side wall building enclosure 2 and steel purlin
Pipe support, comprising: one end of the steel pipe support and the steel purlin are held out against, the another of steel pipe support described in jack pair is used
One end applies precompression, adds locking wedge block in the other end of the steel pipe support when precompression to be applied reaches preset pressure
And unclamp jack.
A kind of embodiment according to the present invention, described steel pipe support one end are fixing end, and one end is movable end, the work
Moved end uses segmented head form, to adapt to the requirement of tunnel cross-section change width.
According to the technique and scheme of the present invention, after cheating structure in forming the hole, the hole cheated in the artificial smooth hole
Bottom 5 simultaneously applies bottom cushion, with water proof and increases supporting degree；And it carries out step 6) and removes first of steel purlin and steel pipe
Support 3；Remove the second steel purlin and steel pipe support 4；Template is set up in cheating in the hole pours hole master in the hole
Bottom plate, side plate and the top plate of body structure.
A kind of embodiment according to the present invention, formed in the hole cheat structure and reach design strength 85% after, tear open
Except first of steel purlin and steel pipe support 3 and the second steel purlin and steel pipe support 4, remove as the reverse of installation
Process operation, primary remove causes to cheat stress mutation in the hole in order to prevent, therefore is removed using tabbing mode.
A kind of embodiment according to the present invention, in the hole hole in set up template pour hole in cheat bottom plate, side plate and
Before top plate, waterproof construction is applied in the hole bottom Zhong Keng 5 and side wall, it is preferable that the waterproof construction is asphalt waterproofing volume
Material.
The object of the present invention is to provide holes in a kind of hole of open trench tunnel to excavate construction method for supporting, using stage excavation,
First excavate supporting again, and when excavating supporting method, improve hole in the hole of open trench tunnel and excavate and the efficiency of supporting, drop
Low geologic risk, it is easy to promote and utilize.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (10)
1. construction method for supporting is excavated in hole in a kind of hole of open trench tunnel, which is characterized in that method includes the following steps:
1) it excavates and forms the main foundation pit in tunnel, the main foundation pit has main foundation pit bottom (1)；
2) building enclosure is applied to the two sidewalls of the main foundation pit, wherein the building enclosure of one side wall is applied into default hole and cheated
Using the side wall building enclosure (2) as hole one side wall in the hole at depth location；
3) the first layer earth excavation cheated in the hole is carried out in the pre-position of the main foundation pit bottom (1), while excavation
Just shotcrete support is carried out in the side wall of exposed soil layer, until excavating to the first predetermined depth；After first shotcrete support
Side wall apply fashioned iron combined bolting and shotcrete；First of steel purlin is set up between the side wall building enclosure (2) and opposite side wall
And steel pipe support (3)；
4) the longitudinal slope for carrying out the second layer earthwork cheated in the hole is excavated, and side wall while excavation in exposed soil layer carries out
First shotcrete support, until excavating to the second predetermined depth；Side wall after first shotcrete support applies fashioned iron spray anchor branch
Shield；Second steel purlin and steel pipe support (4) are set up between the side wall building enclosure (2) and opposite side wall；
5) the longitudinal slope for carrying out the third layer earthwork cheated in the hole is excavated, and side wall while excavation in exposed soil layer carries out
First shotcrete support is cheated at depth location into the default hole until excavating, is cheated with being formed in the hole；In just spray coagulation
Side wall after native supporting applies fashioned iron combined bolting and shotcrete；The hole bottom (5) cheated in the artificial smooth hole simultaneously applies bottom cushion；
6) first of steel purlin and steel pipe support (3) are removed；Remove the second steel purlin and steel pipe support (4)；?
Template is set up in cheating in the hole pours bottom plate, side plate and the top plate that main structure is cheated in the hole.
2. construction method for supporting is excavated in hole in hole according to claim 1, which is characterized in that first predetermined depth is
It is 1/3 that depth is cheated in the default hole, longitudinal slope that the 1/3 of depth, second predetermined depth is cheated in the default hole
The gradient is 1:1.
3. construction method for supporting is excavated in hole in hole according to claim 1, which is characterized in that step 3), step 4) and step
It is rapid 5) in apply fashioned iron combined bolting and shotcrete and include:
Multiple fashioned iron steel are installed along side wall perpendicular to the excavation face of the foundation pit bottom (1) on the side wall after first shotcrete support
Frame；
Multiple anchor poles are installed between the multiple profile steel frame；
Steel mesh is hung on the multiple anchor pole；And
To the gap gunite concrete between the multiple profile steel frame, the multiple anchor pole and steel mesh.
4. construction method for supporting is excavated in hole in hole according to claim 3, which is characterized in that the profile steel frame is I-shaped
Steel.
5. construction method for supporting is excavated in hole in hole according to claim 3, which is characterized in that the multiple fashioned iron steel of installation
Frame includes:
Longitudinally connected muscle is set between every two profile steel frame；And
It is connected by high-strength bolts the multiple profile steel frame.
6. construction method for supporting is excavated in hole in hole according to claim 3, which is characterized in that the multiple fashioned iron steel of installation
Frame further include:
In the case that gap between the side wall after the profile steel frame and the just shotcrete support is greater than prepsetting gap,
Concrete correcting wedge is set between the side wall after the profile steel frame and the just shotcrete support and the gap is sprayed
Concrete carries out spray and fills out.
7. construction method for supporting is excavated in hole in hole according to claim 1, which is characterized in that set up first in step 3)
Second steel purlin is set up in steel purlin and steel pipe support (3) and step 4) and steel pipe support (4) includes:
Make steel purlin and steel pipe support；
Purlin triangle bracket is installed in the side wall building enclosure (2) opposite side wall；
The steel purlin is installed on the purlin triangle bracket；
The steel pipe support is installed between the side wall building enclosure (2) and the steel purlin；And
Prestressing force is applied to the steel pipe support.
8. construction method for supporting is excavated in hole in hole according to claim 7, which is characterized in that the purlin triangle bracket
It is made of angle steel, the side wall installation purlin triangle bracket opposite in side wall building enclosure (2) includes:
The purlin triangle bracket is fixed on the opposite side wall of the side wall building enclosure (2) using setscrew.
9. construction method for supporting is excavated in hole in hole according to claim 7, which is characterized in that the installation steel purlin packet
It includes:
Pass through the fixed steel purlin of flower basket bolt.
10. construction method for supporting is excavated in hole in hole according to claim 7, which is characterized in that described to go along with sb. to guard him knot in side wall
Steel pipe support is installed between structure (2) and steel purlin, comprising:
One end of the steel pipe support and the steel purlin are held out against, applied using the other end of steel pipe support described in jack pair
Precompression, other end when precompression to be applied reaches preset pressure in the steel pipe support add locking wedge block and unclamp thousand
Jin top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810790999.2A CN108951647A (en) | 2018-07-18 | 2018-07-18 | Construction method for supporting is excavated in hole in the hole of open trench tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810790999.2A CN108951647A (en) | 2018-07-18 | 2018-07-18 | Construction method for supporting is excavated in hole in the hole of open trench tunnel |
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| CN108951647A true CN108951647A (en) | 2018-12-07 |
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| CN110670600A (en) * | 2019-09-18 | 2020-01-10 | 中国电建集团山东电力建设第一工程有限公司 | Thermal power plant confined space deep foundation pit pool construction safety enclosure device and method |
| CN110984163A (en) * | 2019-11-20 | 2020-04-10 | 中铁四局集团第四工程有限公司 | Annular earth excavation method for four corners of subway transfer node pit-in-pit |
| CN111576483A (en) * | 2020-05-21 | 2020-08-25 | 中铁十二局集团有限公司 | Open-cut construction method for sensitive building section near intercity railway tunnel |
| CN115467371A (en) * | 2022-10-09 | 2022-12-13 | 中交第四航务工程局有限公司 | Tunnel segment construction method |
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| CN110984163A (en) * | 2019-11-20 | 2020-04-10 | 中铁四局集团第四工程有限公司 | Annular earth excavation method for four corners of subway transfer node pit-in-pit |
| CN111576483A (en) * | 2020-05-21 | 2020-08-25 | 中铁十二局集团有限公司 | Open-cut construction method for sensitive building section near intercity railway tunnel |
| CN115467371A (en) * | 2022-10-09 | 2022-12-13 | 中交第四航务工程局有限公司 | Tunnel segment construction method |
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Application publication date: 20181207 |