CN110284505A - The construction method of massif foundation pit - Google Patents
The construction method of massif foundation pit Download PDFInfo
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- CN110284505A CN110284505A CN201910357264.5A CN201910357264A CN110284505A CN 110284505 A CN110284505 A CN 110284505A CN 201910357264 A CN201910357264 A CN 201910357264A CN 110284505 A CN110284505 A CN 110284505A
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- foundation pit
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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
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0021—Mortar
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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)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
This application provides a kind of construction methods of massif foundation pit, are related to technical field of building construction, and the construction method of the massif foundation pit includes earth excavation；It is excavated according to the form of segmentation, layering, piecemeal；In such a way that the top layout gutter of foundation pit combines lowering of watertable, guaranteeing that construction is in anhydrous state；Supporting construction, including natural discharging slope and suspension roof support；And slope form is monitored in real time；Build barricade；Using the lattice barricade of multiple diamond shapes, it is all made of concreting between adjacent lattice barricade, fills out planting soil grass planting in each beam lattice；It is respectively provided with expansion joint between adjacent lattice barricade, the filled bitumen matizhi in expansion joint；Build drainage system and backfilling of earthwork.
Description
Technical field
This application involves the construction methods of the realm of building construction more particularly to massif foundation pit.
Background technique
Foundation pit is the heatable adobe sleeping platform excavated in basic engineering position by substrate absolute altitude and basic plane size, the construction work of foundation pit
Sequence is more, and process is complicated.Foundation pit construction in the prior art, has a variety of defects, such as: drainage problem obtains during earth excavation
Less than guarantee, construction quality and safety are influenced；When supporting construction, sloping coefficient is difficult to control, and is easy to appear landslide；The gear of build
Wall is affected by temperature, and change in size is big, influences the configuration of entire barricade.Therefore, lacking one kind in the prior art can protect
Demonstrate,prove the foundation ditch construction method of construction quality and safety.
Summary of the invention
The application purpose is to solve the above problems, and this application provides a kind of construction methods of massif foundation pit, by changing
It, being capable of effective guarantee construction quality and safety into form of construction work.
To achieve the above object, the application provides a kind of construction method of massif foundation pit, including following construction procedure:
Earth excavation；It is excavated according to the form of segmentation, layering, piecemeal；By being combined in the top layout gutter of foundation pit
The mode of lowering of watertable guarantees that construction is in anhydrous state；
Supporting construction；Including natural discharging slope and suspension roof support；Natural discharging slope refers to when excavation depth is more than setting value, carries out
Slope, and slope form is monitored in real time；Suspension roof support refers to: boring mounting hole in foundation pit, and rockbolt installation is extremely installed
In hole, slip casting is carried out to the anchor pole in mounting hole, anchor pole is fixed in mounting hole, slab reinforcement is laid on anchor pole,
And it carries out pouring fixation using concrete；
Build barricade；It is dug on roadbed side slope according to measurement result and cuts gradient slot, carry out cutting slope on the basis of gradient slot, surveyed
Measure and cut slope from top to bottom alternately；Foundation trench is excavated in foundation pit, is then successively laid on reinforcing bar in foundation pit, and to reinforcing bar
Carry out setting-out, cutting, bending process；Structure sheaf in foundation pit is cleared up, then formwork, armored concrete is embedded at side slope
In or on overlay in side slope；Using the lattice barricade of multiple diamond shapes, it is all made of concreting between adjacent lattice barricade,
Planting soil grass planting is filled out in each beam lattice；It is respectively provided with expansion joint between adjacent lattice barricade, the filled bitumen Ma in expansion joint
Hoof rouge；
Build drainage system；Multiple gutters are dug in the substrate of foundation pit, sump is set between adjacent row ditch, is catchmented
Well is connected to city planting ductwork；At least multiple massif intercepting ditch are built at the middle part of massif, each massif intercepting ditch is all connected with municipal administration
Pipe network, and it is respectively provided with setting pot in every section of massif intercepting ditch, to clear up the sundries in intercepting ditch；It repairs periphery around massif
The foot of the hill gutter of at least one annular is built, foot of the hill gutter connects municipal drainage pipe network；
Backfilling of earthwork；When the surface layer of earth material in foundation pit is mud and silty clay layer, to carrying out processing of drawing water in foundation pit,
After earth material sunning, outward transport is excavated, until stopping when there is strongly weathered sand-rock surface layer in foundation pit to the clear of the earth material in foundation pit
Fortune, newly into banket and be backfilled in foundation pit；Then foundation pit is continued to backfill using native horsestone.
It further, further include blasting procedure；Unwrapping wire is measured to foundation pit face, the position of drilling is determined, in support pile
Outside arrange that double shock relieve vent is crushed the cubic meter of stone of supporting construction in a certain range by the way of artificial；Facing
Multiple loose blast holes are laid on empty face, and are drilled to each loose blast hole, are installed explosive in each pine blast hole, are blocked, to more
A pine blast hole carries out blasting network laying；Using two layers of rubber protective net and pile sandbag is protected；It clears out a gathering place to quick-fried area,
And warning is set, start blaster.
Further, before earth excavation, region is being excavated, is being laid close to the position of massif for reducing explosion to week
Enclose the damping trough that the building built damages；In foundation pit, formation is beaten using artificial or mechanical equipment chisel and is subtracted
Ditch is shaken, the cutting depth of Damping ditch is lower than one meter of blast hole.
Further, after blasting procedure, if it find that miso-fire, first safety measure is guarded against in setting near miso-fire；?
Capable eye is tied in the side of miso-fire, and in parallel intraocular powder charge, then detonates.
Further, it in backfilling of earthwork step, when the thickness that every layer is banketed is not more than 300mm, is rammed using machinery
Pressure, when the thickness that every layer is banketed is not more than 200mm, using hand compaction.
Further, in earth excavation step, for vertical layered excavation, the depth of every layer of excavation is not more than 2m；Needle
Flat field is excavated, execavated rockmass ratio of slope uses: plain fill 1:1.5, silty clay 1:1.25, severely-weathered basement rock 1:0.75, apoplexy
Change basement rock 1:0.5.
Further, in earth excavation step, further includes: determine and excavate the gradient, through measurement and positioning, levelling unwrapping wire is fixed
Excavation width out is cut the earth by unwrapping wire.
Further, it in the process for building drainage system, when gutter is located in rock, is carved in middle decayed rock
MU15 solid brick M7.5 masonry of cement mortar is used after slot, uses ratio for the cement sand plaster of 1:3, and plastering minimum thickness is not
Less than 20mm；Remaining cuts, gutter uses MU15 solid brick, M7.5 masonry of cement mortar, and 1:3 cement sand plaster, minimum is smeared
Face thickness is not less than 20mm；It cuts, use concrete facing between gutter and barricade, thickness is not less than 100mm, cuts, gutter slope
Degree is not preferably less than 0.5%, and when the gradient is greater than 10%, step-like gutter, step wide 2000mm, high 500mm is arranged.
Further, in the process for building drainage system:
When intercepting ditch construction part is middle decayed rock, 500 × 500 grooves are dug using carving in rock, then use
The solid brick and M7.5 masonry of cement mortar wall thickness 100 of MU15, base thickness 100, headroom 300, height 400 groove, lean on slope side
Do it is 300 wide, 0.5% look for slope and do 100 thickness C20 concrete enclosings；
When intercepting ditch construction part be soil layer in when, using the solid brick and M7.5 masonry of cement mortar wall thickness 200 of MU15,
The groove of base thickness 200, headroom 300, height 400 does wide 300,0.5% by slope side and looks for slope and with 100 thickness C20 concrete
Closing.
Compared to the prior art, the construction method of massif foundation pit provided by the present application, in the disposed outside gutter of foundation pit,
The water outside foundation pit is avoided to enter inside foundation pit；The measure of lowering of watertable is taken in the inside of foundation pit, such as is taken out by water pump
Take local underground water；In addition, also built drainage system, drainage system includes sump, massif intercepting ditch, foot of the hill gutter,
Three is connected by city planting ductwork, is effectively drained；Pass through above-mentioned measure, it can be ensured that in the construction process, do not influenced by water level,
Guarantee construction quality and safety.
In supporting construction, by the way of natural discharging slope combination suspension roof support, wherein it is important that slope form into
Row real time monitoring, including the information such as the gradient, width, height, when slope form changes and alarm, guarantee construction are pacified
Entirely.
When building barricade, using the lattice barricade of multiple diamond shapes, planting soil grass planting is filled out in each beam lattice, guarantees water and soil
It is firm, it avoids coming down；It is respectively provided with expansion joint between adjacent lattice barricade, the filled bitumen matizhi in expansion joint is effectively right
Deformation caused by resisting temperature guarantees the stabilization of entire barrier wall structure.
Specific embodiment
For the purposes, technical schemes and advantages of the application are more clearly understood, below with reference to embodiment, the application is made
Further to be described in detail, the exemplary embodiment and its explanation of the application is only used for explaining the application, is not intended as to this
The restriction of application.
A kind of construction method for massif foundation pit that the application is proposed, including following construction procedure:
Earth excavation；It is excavated according to the form of segmentation, layering, piecemeal；Specifically, it is first determined the gradient is excavated, through surveying
Amount positioning, levelling unwrapping wire make excavation width, cut the earth by unwrapping wire.
Specifically, for vertical layered excavation, the depth of every layer of excavation is not more than 2m；It is excavated for flat field, excavation side
Slope ratio of slope uses: plain fill 1:1.5, silty clay 1:1.25, severely-weathered basement rock 1:0.75, middle weathered rocks 1:0.5.
In addition, earth excavation during the top layout gutter of foundation pit combine lowering of watertable by way of,
Guarantee that construction is in anhydrous state.
Supporting construction；Including natural discharging slope and suspension roof support；Natural discharging slope refers to when excavation depth is more than setting value, carries out
Slope, and slope form is monitored in real time；Suspension roof support refers to: boring mounting hole in foundation pit, and rockbolt installation is extremely installed
In hole, slip casting is carried out to the anchor pole in mounting hole, anchor pole is fixed in mounting hole, slab reinforcement is laid on anchor pole,
And it carries out pouring fixation using concrete；
Build barricade；It is dug on roadbed side slope according to measurement result and cuts gradient slot, carry out cutting slope on the basis of gradient slot, surveyed
Measure and cut slope from top to bottom alternately；Foundation trench is excavated in foundation pit, is then successively laid on reinforcing bar in foundation pit, and to reinforcing bar
Carry out setting-out, cutting, bending process；Structure sheaf in foundation pit is cleared up, then formwork, armored concrete is embedded at side slope
In or on overlay in side slope；Using the lattice barricade of multiple diamond shapes, it is all made of concreting between adjacent lattice barricade,
Planting soil grass planting is filled out in each beam lattice；It is respectively provided with expansion joint between adjacent lattice barricade, the filled bitumen Ma in expansion joint
Hoof rouge；
Build drainage system；Multiple gutters are dug in the substrate of foundation pit, sump is set between adjacent row ditch, is catchmented
Well is connected to city planting ductwork；At least multiple massif intercepting ditch are built at the middle part of massif, each massif intercepting ditch is all connected with municipal administration
Pipe network, and it is respectively provided with setting pot in every section of massif intercepting ditch, to clear up the sundries in intercepting ditch；It repairs periphery around massif
The foot of the hill gutter of at least one annular is built, foot of the hill gutter connects municipal drainage pipe network；
In the process for building drainage system, when gutter is located in rock, used after cutting in middle decayed rock
MU15 solid brick M7.5 masonry of cement mortar, uses ratio for the cement sand plaster of 1:3, and plastering minimum thickness is not less than
20mm；Remaining cuts, gutter uses MU15 solid brick, M7.5 masonry of cement mortar, 1:3 cement sand plaster, and minimum plastering is thick
Degree is not less than 20mm；Cut, use concrete facing between gutter and barricade, thickness is not less than 100mm, cut, the gutter gradient not
Preferably less than 0.5%, when the gradient is greater than 10%, step-like gutter, step wide 2000mm, high 500mm are set.
When intercepting ditch construction part is middle decayed rock, 500 × 500 grooves are dug using carving in rock, then use
The solid brick and M7.5 masonry of cement mortar wall thickness 100 of MU15, base thickness 100, headroom 300, height 400 groove, lean on slope side
Do it is 300 wide, 0.5% look for slope and do 100 thickness C20 concrete enclosings；When intercepting ditch construction part is in soil layer, use
The solid brick and M7.5 masonry of cement mortar wall thickness 200 of MU15, base thickness 200, headroom 300, height 400 groove, lean on slope side
It does wide 300,0.5% and looks for slope and with 100 thickness C20 concrete enclosings.
Backfilling of earthwork；When the surface layer of earth material in foundation pit is mud and silty clay layer, to carrying out processing of drawing water in foundation pit,
After earth material sunning, outward transport is excavated, until stopping when there is strongly weathered sand-rock surface layer in foundation pit to the clear of the earth material in foundation pit
Fortune, newly into banket and be backfilled in foundation pit；Then foundation pit is continued to backfill using native horsestone.
In backfilling of earthwork step, when the thickness that every layer is banketed is not more than 300mm, pressure is rammed using machinery, is filled out when every layer
When the thickness of soil is not more than 200mm, using hand compaction.Using it is above-mentioned mechanical and manually combine by the way of ram pressure, can take into account
Efficiency and economy.
It in some embodiments, further include blasting procedure；Unwrapping wire is measured to foundation pit face, determines the position of drilling,
The outside of support pile arranges that double shock relieve vent carries out brokenly the cubic meter of stone of supporting construction in a certain range by the way of artificial
It is broken；Multiple loose blast holes are laid on free face, and are drilled to each loose blast hole, install explosive, envelope in each pine blast hole
It is stifled, blasting network laying is carried out to multiple loose blast holes；Using two layers of rubber protective net and pile sandbag is protected；To quick-fried area into
Row is cleared out a gathering place, and warning is arranged, and starts blaster.
In addition it is also necessary to other explosion preparatory process, such as: before earth excavation, region is being excavated, close to massif
Lay the damping trough damaged for reducing explosion to the building that surrounding has been built in position；In foundation pit, using people
Work or mechanical equipment chisel are beaten to form Damping ditch, and the cutting depth of Damping ditch is lower than one meter of blast hole.
After blasting procedure, if it find that miso-fire, first safety measure is guarded against in setting near miso-fire；In the side of miso-fire
Capable eye is tied, and in parallel intraocular powder charge, is then detonated.Aforesaid operations can effectively ensure that shotfiring safety.
Compared to the prior art, the construction method of massif foundation pit provided by the present application, in the disposed outside gutter of foundation pit,
The water outside foundation pit is avoided to enter inside foundation pit；The measure of lowering of watertable is taken in the inside of foundation pit, such as is taken out by water pump
Take local underground water；In addition, also built drainage system, drainage system includes sump, massif intercepting ditch, foot of the hill gutter,
Three is connected by city planting ductwork, is effectively drained；Pass through above-mentioned measure, it can be ensured that in the construction process, do not influenced by water level,
Guarantee construction quality and safety.
In supporting construction, by the way of natural discharging slope combination suspension roof support, wherein it is important that slope form into
Row real time monitoring, including the information such as the gradient, width, height, when slope form changes and alarm, guarantee construction are pacified
Entirely.
When building barricade, using the lattice barricade of multiple diamond shapes, planting soil grass planting is filled out in each beam lattice, guarantees water and soil
It is firm, it avoids coming down；It is respectively provided with expansion joint between adjacent lattice barricade, the filled bitumen matizhi in expansion joint is effectively right
Deformation caused by resisting temperature guarantees the stabilization of entire barrier wall structure.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the application, rather than its limitations；To the greatest extent
Pipe is described in detail the application referring to foregoing embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, each embodiment technology of the application that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (9)
1. a kind of construction method of massif foundation pit, which is characterized in that including following construction procedure:
Earth excavation；It is excavated according to the form of segmentation, layering, piecemeal；In the top layout gutter of foundation pit, dropped inside foundation pit
Phreatic low；
Supporting construction；Including natural discharging slope and suspension roof support；Natural discharging slope includes: to carry out when excavation depth is more than setting value
Slope, and slope form is monitored in real time；Suspension roof support includes: mounting hole to be bored in foundation pit, and rockbolt installation is extremely pacified
It fills in hole, slip casting is carried out to the anchor pole in mounting hole, anchor pole is fixed in mounting hole, slab reinforcement is laid on anchor pole
On, and carry out pouring fixation using concrete；
Build barricade；Dug on roadbed side slope according to measurement result and cut gradient slot, carry out cutting slope on the basis of gradient slot, measurement with
Cut slope from top to bottom alternately；Foundation trench is excavated in foundation pit, is then successively laid on reinforcing bar in foundation pit, and reinforcing bar is carried out
Setting-out, cutting, bending process；Structure sheaf in foundation pit is cleared up, then formwork, armored concrete in the side slope or
It is overlayed in side slope on person；Using the lattice barricade of multiple diamond shapes, it is all made of concreting between adjacent lattice barricade, every
Planting soil grass planting is filled out in a beam lattice；It is respectively provided with expansion joint between adjacent lattice barricade, the filled bitumen matizhi in expansion joint；
Build drainage system；Multiple gutters are dug in the substrate of foundation pit, sump is set between adjacent row ditch, and sump connects
It is connected to city planting ductwork；At least multiple massif intercepting ditch are built at the middle part of massif, each massif intercepting ditch is all connected with city planting ductwork,
And it is respectively provided with setting pot in every section of massif intercepting ditch, to clear up the sundries in intercepting ditch；It builds extremely periphery around massif
A few annular foot of the hill gutter, foot of the hill gutter connect municipal drainage pipe network；
Backfilling of earthwork；When the surface layer of earth material in foundation pit is mud and silty clay layer, to processing of drawing water is carried out in foundation pit, to soil
After material sunning, outward transport is excavated, until stopping clearing to the earth material in foundation pit, newly when there is strongly weathered sand-rock surface layer in foundation pit
Into banket and be backfilled in foundation pit；Then foundation pit is continued to backfill using native horsestone.
2. the construction method of massif foundation pit according to claim 1, which is characterized in that further include blasting procedure；To foundation pit
Face measures unwrapping wire, determines the position of drilling, arranges double shock relieve vent in the outside of support pile, right by the way of artificial
The cubic meter of stone of supporting construction in a certain range is crushed；Lay multiple loose blast holes on free face, and to each loose blast hole into
Row drills, and installs explosive in each pine blast hole, blocks, and carries out blasting network laying to multiple loose blast holes；Using two layers of rubber
Simultaneously pile sandbag is protected protective net；It clears out a gathering place to quick-fried area, and warning is set, start blaster.
3. the construction method of massif foundation pit according to claim 2, which is characterized in that before earth excavation, excavating
The damping trough damaged for reducing explosion to the building that surrounding has been built is laid in region close to the position of massif；
It in foundation pit, beats to form Damping ditch using artificial or mechanical equipment chisel, the cutting depth of Damping ditch is lower than one meter of blast hole.
4. the construction method of massif foundation pit according to claim 2 or 3, which is characterized in that after blasting procedure, if
It was found that miso-fire, first safety measure is guarded against in setting near miso-fire；Capable eye is tied in the side of miso-fire, and in parallel intraocular powder charge,
Then it detonates.
5. the construction method of massif foundation pit according to claim 1, which is characterized in that in backfilling of earthwork step, when every
When the thickness that layer bankets is no more than 300mm, pressure is rammed using machinery, when the thickness that every layer is banketed is not more than 200mm, using artificial
Compacting.
6. the construction method of massif foundation pit according to claim 1, which is characterized in that in earth excavation step, for
The depth of vertical layered excavation, every layer of excavation is not more than 2m；It is excavated for flat field, execavated rockmass ratio of slope uses: plain fill 1:
1.5, silty clay 1:1.25, severely-weathered basement rock 1:0.75, middle weathered rocks 1:0.5.
7. the construction method of massif foundation pit according to claim 1, which is characterized in that in earth excavation step, also wrap
It includes: determining and excavate the gradient, through measurement and positioning, levelling unwrapping wire makes excavation width, cuts the earth by unwrapping wire.
8. the construction method of massif foundation pit according to claim 1, which is characterized in that in the process for building drainage system
In, when gutter is located in rock, MU15 solid brick M7.5 masonry of cement mortar is used after cutting in middle decayed rock, is adopted
The cement sand plaster for being 1:3 with ratio, plastering minimum thickness are not less than 20mm；Remaining cuts, gutter uses MU15 solid brick,
M7.5 masonry of cement mortar, 1:3 cement sand plaster, minimum plastering thickness are not less than 20mm；It cuts, used between gutter and barricade
Concrete facing, thickness are not less than 100mm, cut, the gutter gradient is not preferably less than 0.5%, when the gradient is greater than 10%, setting step
Shape gutter, step wide 2000mm, high 500mm.
9. the construction method of massif foundation pit according to claim 1, which is characterized in that in the process for building drainage system
In:
When intercepting ditch construction part is middle decayed rock, 500 × 500 grooves are dug using carving in rock, then using MU15's
Solid brick and M7.5 masonry of cement mortar wall thickness 100, base thickness 100, headroom 300, height 400 groove, do 300 by slope side
It is wide, 0.5% look for slope and do 100 thickness C20 concrete enclosings；
When intercepting ditch construction part is in soil layer, using the solid brick and M7.5 masonry of cement mortar wall thickness 200, base thickness of MU15
200, the groove of headroom 300, height 400 does wide 300,0.5% by slope side and looks for slope and with 100 thickness C20 concrete enclosings.
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| CN111043923A (en) * | 2019-12-10 | 2020-04-21 | 中铁隆工程集团有限公司 | Blasting method suitable for adjacent important buildings |
| CN115059096A (en) * | 2022-03-30 | 2022-09-16 | 上海二十冶建设有限公司 | Construction method of shale geology adjacent to rotational flow pool of existing factory building |
| CN115233734A (en) * | 2022-09-20 | 2022-10-25 | 山西路桥市政工程有限公司 | Municipal tunnel construction method |
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| CN115059096A (en) * | 2022-03-30 | 2022-09-16 | 上海二十冶建设有限公司 | Construction method of shale geology adjacent to rotational flow pool of existing factory building |
| CN115233734A (en) * | 2022-09-20 | 2022-10-25 | 山西路桥市政工程有限公司 | Municipal tunnel construction method |
| CN115233734B (en) * | 2022-09-20 | 2022-11-29 | 山西路桥市政工程有限公司 | Municipal tunnel construction method |
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