CN109944250A - The foundation pit of impermanent vertical support system is along inverse combining construction method - Google Patents
The foundation pit of impermanent vertical support system is along inverse combining construction method Download PDFInfo
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Abstract
The present invention provides a kind of foundation pits of impermanent vertical support system along inverse combining construction method, belongs to Foundation Pit Support Design and technical field of construction, provides a kind of while having the advantages that contrary sequence method and the construction method along the practice.This method is supported using permanent structure beam slab as horizontal direction, the vertical force during undertaking foundation pit construction using interim vertical support component.By floor " from top to bottom " earth excavation and pouring structure beam slab, permanent vertical member is poured " from the bottom to top " again after the completion of construction of bottom plates, and last " from top to bottom " removes interim steel column, completes the earth excavation and structure construction of entire basement.While replacing internal support of foundation pit using permanent structure beam slab; vertical force during undertaking foundation pit construction using interim vertical support component; and connected by reasonable sequence of construction and reliable node, realize the excavation of foundation pit and basement structure construction of entire basement.
Description
Technical field
The present invention relates to Foundation Pit Support Designs and technical field of construction, and in particular to a kind of impermanent vertical support system
Foundation pit is along inverse combining construction method.
Background technique
Contrary sequence method in base pit engineering, refers to using main body basement beam slab as internal support of foundation pit, by floor from upper and
The method of lower excavation and basement of constructing because big, environment influences small, the saving duration with support stiffness for it, and saves construction
Many advantages, such as place and be applied in base pit engineering.
Vertical support component in conventional contrary sequence method, using " one pile for one column " that can also serve as permanent structure, i.e., in basement
Supporting pile and column are squeezed into structural column position, the vertical loads such as dead load and construction loads are born in construction period, in validity period
Between bear main structure permanent load.Since " one pile for one column " will be used as permanent structure after the completion of construction, therefore to vertical support
Column and the control of the verticality and deviation of stake etc. have extremely harsh requirement, must use special one pile for one column vertical adjustment equipment and work
Skill, and by there is the abundant inverse construction team for making experience to operate, to ensure body's structure quality.
But it is limited in the area that some equipment and professional labor power lack because condition lacks or is difficult to the reason of overcoming
The implementation of conventional contrary sequence method has been made, it, can if still also serving as the inverse of permanent structure using conventional interim vertical support by force makees method
Can there are problems that the verticality of pillar and stake is difficult to ensure and influences architecture quality, and if use instead along the practice, though construction is opposite
It is convenient, but be unable to reach contrary sequence method environment and influence small effect, and can not be using basement roof as construction site.
In addition, foundation pit steel column is squeezed into many years ago for the base pit engineering of some transformation projects, it is improved permanent
Structural grid is not overlapped with interim steel column, and the verticality for the steel column squeezed into is unable to satisfy a conventional contrary sequence method " column one
How the high-precision requirement of stake " can be excavated using contrary sequence method and use existing steel column, become an engineering skill
Art problem.
Therefore, in view of the above-mentioned problems, how to provide a kind of while having the advantages that contrary sequence method and the construction method along the practice, and
Practicable construction solution and technical support are provided for corresponding engineering, becomes one of pendulum in face of engineers and technicians
Project.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
Recognize or imply in any form that the information is the prior art well known to persons skilled in the art when being considered as.
Summary of the invention
The object of the present invention is to provide a kind of foundation pits of impermanent vertical support system along inverse combining construction method, retains normal
While advising contrary sequence method horizontal as foundation pit using basement beam slab inner support, using the impermanent vertical branch similar to the suitable practice
The system of holding undertakes the vertical load during foundation pit construction.During excavation, periphery horizontally Water And Earth Pressures by underground
Room contignation undertakes, the vertical supporting member that vertical construction loads, beam slab self weight etc. are made of interim steel column and stand column pile
It undertakes；During basement use, interim vertical support system has been removed, and vertical load is undertaken by permanent structure column and structure pile.
To achieve the goals above, the technical scheme is that
A kind of foundation pit of impermanent vertical support system includes the following steps: along inverse combining construction method
Step 1: the interim steel column of foundation pit, stand column pile, building enclosure construction are completed, excavates the first floor earthwork to underground ceiling
The following certain distance of plate absolute altitude, with digging with pouring concrete bed course；
Step 2: erection construction framed bent, pouring construction basement roof structure；
Step 3: continuing to excavate the second layer earthwork to the following certain distance of basement one floor absolute altitude, mixed with pouring with digging
Solidifying soil padding；
Step 4: erection construction framed bent, pouring construction basement one floor construction；
Step 5: continuing to be excavated to the following certain distance of underground N-1 floor plate absolute altitude, with digging with casting concrete bed course；
Step 6: erection construction framed bent, N-1 layers of pouring construction underground floor construction；
Step 7: earth excavation pours the concrete cushion at hole bottom to cheating bottom in time；
Step 8: pouring construction basement bottom board；
Step 9: the vertical member that N layers of pouring construction underground；
Step 10: the layer-by-layer pouring construction underground N-1 layers of vertical member to basement roof from the bottom to top, until having poured
At the vertical member of entire basement；
Step 11: the interim steel column of basement one is removed；
Step 12: from top to bottom successively removing the interim steel column of each floor, until completing the interim of entire basement
Steel column is removed, and so far, completes the excavation of foundation pit and Underground Construction of entire basement.
Compared with prior art, the present invention is beneficial has the technical effect that
(1) foundation pit of impermanent vertical support system of the invention is along inverse combining construction method, using permanent structure beam slab
It is supported as horizontal direction, the vertical force during undertaking foundation pit construction using interim vertical support component.By floor " from top to bottom "
Earth excavation and pouring structure beam slab pour permanent vertical member after the completion of construction of bottom plates " from the bottom to top " again, last " by up to
Under " interim steel column is removed, complete the earth excavation and structure construction of entire basement.Base is replaced using permanent structure beam slab
While cheating inner support, the vertical force during undertaking foundation pit construction using interim vertical support component, and by reasonably constructing
Sequence and reliable node connection, realize the excavation of foundation pit and basement structure construction of entire basement.It is particularly suitable for interim
The foundation pit improvement project that steel column early stage has squeezed into and structural grid is not overlapped with the stud squeezed into, can be by existing steel
Column and stand column pile save project cost all of getting up.
(2) foundation pit of impermanent vertical support system of the invention is along inverse combining construction method, while having conventional along work
The advantages of method and contrary sequence method.First is that have conventional contrary sequence method support stiffness is big, surrounding enviroment influence it is small, save the excellent of construction site
Point.Using basement beam slab as the horizontal inner support of foundation pit, the displacement deformation in Excavation Process can be effectively controlled, reduction is opened
The influence to periphery buildings or structures is dug, and basement roof can be used as part construction site, can be used for construction site condition office
The base pit engineering of rush.Second is that having the advantages that the vertical support component construction of the suitable practice is convenient, being easy to control.Due to excavation of foundation pit
The steel column in stage, that is, interim steel column and stand column pile in the future not as basement permanent structure, therefore its degree control require compared with
It is low, it is only necessary to which that the requirement for meeting construction period is not required to additionally increase " one pile for one column " vertical adjustment equipment or the people of conventional contrary sequence method
Power, it is low to the dependence of equipment and specific technique, can be used for the limited newly-built base pit engineering of equipment or steel column early stage squeezed into,
In the foundation pit improvement project of inconvenience setting one pile for one column.
Further, the vertical member includes permanent structure column and wall.
Further, the interim steel column and permanent structure floor junction are equipped with plate interior nodes reinforcement area, respectively cloth
It sets and reinforces angle steel, reinforces peg and bent-up bar；The reinforcement angle steel is close to interim steel column surrounding, by etc. strong welds with face
When steel column connect；The plate interior nodes reinforcement reinforced peg and be symmetrically arranged in interim steel column edge of a wing outside and web two sides
In area；The uniform quadrature arrangement of bent-up bar is reinforced in area in plate interior nodes.By in interim steel column and permanent structure building
The connecting node of plate junction arranging plate interior nodes reinforcement area, interim steel column and permanent structure beam slab has punch resistant capability
By force, advantage simple and beautiful, dismounting is convenient.The connecting node is using reinforcement in the plate without exposed bolumn cap, in structure floor
Middle setting reinforces angle steel, reinforces peg and bent-up bar, strengthens the punching shear resistant performance of node, further, since reinforcing node
Using the construction being hidden in plate, therefore construction site is simple and beautiful, the chisel without exposed bolumn cap when later period interim steel column is removed
It removes, convenient and efficient, the smooth beauty of floor after dismounting.
Further, easy for installation in order to guarantee, so that reinforcing angle steel has preferably force stability, the strengthens angle
Steel is horizontally disposed, and the upper surface for reinforcing angle steel is greater than or equal to floorslab concrete protective layer at a distance from basement floor upper surface
Thickness, angle steel choose steel column length be equal to reinforce peg length.
Further, in order to enhance the punch resistant capability between interim steel column and permanent structure beam slab, realize the two even
It connects in the plate without exposed bolumn cap at node and reinforces way, reinforce the absolute altitude of peg in the lower part for reinforcing angle steel, the reinforcement peg
Diameter is 19~32mm of Ф, reinforces peg length and is not less than 100mm.
Further, it is contemplated that floor and node after the anchoring strength and the interim steel column of guarantee of bent-up bar are removed
The smooth beauty in region, the transfer angle of the bent-up bar are 45 °, and diameter d is not less than 16mm, adjacent two bent-up bars it
Between spacing be not more than 200mm, the selection of specific diameter and spacing passes through Force Calculation determination；The curved terminal in the lower part of bent-up bar
Outside there are anchorage length la, length is not less than 20d, on the top of bent-up bar and interim steel column contact position are truncated and are arranged
The curved terminal in portion, the curved terminal point in top are arranged 90 ° of dog-ears, are arranged in and reinforce in angle steel.
Further, 45° angle institute is thrown from the point that interim steel column intersects with basement floor lower surface toward floor upper surface
The obtained region in horizontal projected area is joint strengthening area.The joint strengthening area of floor construction and vertical member has relatively strong
Punching Shear and antidetonation, cracking resistance.Joint strengthening area is poured using slightly expanded concrete, passes through the swelling fiber of specially treated
Impact energy is absorbed, the effect of concentrated stress is reduced, avoids permanent vertical member and interim vertical member when structure is converted
Secondary cracking.
Further, pouring slightly expanded concrete region is that joint strengthening area and joint strengthening area both sides respectively extend outward
Plate across 1/3~1/5 region enclosed.Since joint strengthening regional stress is relatively concentrated, and when interim steel column dismounting, permanently
There are stress check calculation, floor and interim steel column joint strengthening area and floors and permanent structure column for structural column and interim steel column
Node region is also easy to produce crack.And the swelling fiber in slightly expanded concrete can make it due to taking special surface treatment
Together with cement base-material close adhesion, thus the effect for absorbing impact energy, reducing concentrated stress, therefore, in joint strengthening
Area and joint strengthening area both sides outward each extension board across 1/3~1/5 region enclosed poured using slightly expanded concrete,
The anti-impact shearing stress and cracking resistance and anti-seismic performance that floor can be improved, reduce interim steel column and permanent structure column transition period
Concrete secondary cracking.
Detailed description of the invention
Fig. 1 to Figure 12 is the foundation pit of the impermanent vertical support system of one embodiment of the invention along inverse combining construction method stream
Cheng Tu；
Figure 13 is the foundation pit of the impermanent vertical support system of one embodiment of the invention along in plate in inverse combining construction method
Joint strengthening area cross section structure schematic diagram；
Figure 14 is the A-A cross-sectional view of Figure 13；
Figure 15 is the B-B cross-sectional view of Figure 13.
In figure:
The interim steel column of 1-；2- stand column pile；3- building enclosure；4- basement roof structure；5- basement one floor；6-
Lower two floor plates；10- plate interior nodes reinforce area；11- reinforces angle steel；12- reinforces peg；13- bent-up bar.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to the foundation pit of impermanent vertical support system proposed by the present invention along inverse knot
Construction method is closed to be described in further detail.According to following explanation and claims, advantages and features of the invention will be more clear
Chu.It should be noted that attached drawing is all made of very simplified form and using non-accurate ratio, only to conveniently, lucidly
Aid in illustrating the purpose of the embodiment of the present invention.For sake of convenience, the upper and lower side of "upper" described below, "lower" and attached drawing
To consistent, but this can't be the limitation of technical solution of the present invention.
Embodiment one
The impermanent vertical support system that the present invention will be described in detail by taking F3/B3 foundation pit as an example below with reference to Fig. 1 to Figure 15
Foundation pit along inverse combining construction method.
A kind of foundation pit of impermanent vertical support system includes the following steps: along inverse combining construction method
Step 1: the interim steel column 1 of foundation pit, stand column pile 2, building enclosure 3 are completed and is constructed, excavates the first floor earthwork to basement
The following certain distance of top elevation, with digging with pouring concrete bed course；
Step 2: erection construction framed bent, pouring construction basement roof structure 4；
Step 3: continuing to excavate the second layer earthwork to the following certain distance of basement one floor absolute altitude, mixed with pouring with digging
Solidifying soil padding；
Step 4: erection construction framed bent, 5 structure of pouring construction basement one floor；
Step 5: continue earth excavation to two floor plate of underground, 6 or less certain distance, with digging with casting concrete bed course；
Step 6: erection construction framed bent, two floor plate of pouring construction underground, 6 structure；
Step 7: earth excavation pours the concrete cushion at hole bottom to cheating bottom in time；
Step 8: pouring construction basement bottom board；
Step 9: the vertical member of pouring construction F3/B3；
Step 10: from the bottom to top two layers of layer-by-layer pouring construction underground, basement one vertical member, until pour complete it is whole
The vertical member of a basement；
Step 11: the interim steel column 1 of basement one is removed；
Step 12: from top to bottom successively removing the interim steel column 1 of each floor, until completing the interim of entire basement
Steel column is removed, and so far, completes the excavation of foundation pit and Underground Construction of entire basement.
Specifically, the foundation pit of impermanent vertical support system of the invention is along inverse combining construction method, using permanent knot
Structure beam slab is supported as horizontal direction, the vertical force during undertaking foundation pit construction using interim vertical support component.By floor " by upper
Under " simultaneously pouring structure beam slab, construction of bottom plates pour permanent vertical member after the completion to earth excavation " from the bottom to top " again, finally
" from top to bottom " interim steel column is removed, the earth excavation and structure construction of entire basement are completed.Use permanent structure beam
While plate replaces internal support of foundation pit, the vertical force during undertaking foundation pit construction using interim vertical support component, and pass through conjunction
The sequence of construction of reason and the connection of reliable node, realize the excavation of foundation pit and basement structure construction of entire basement.It is especially suitable
It has been squeezed into for interim steel column early stage and foundation pit improvement project that structural grid is not overlapped with the stud squeezed into, it can general
Existing steel column and stand column pile save project cost all of getting up.
In the present embodiment, it is highly preferred that according to design requirement, vertical member includes permanent structure column and wall.
In the present embodiment, it is highly preferred that interim steel column 1 is reinforced with permanent structure floor junction equipped with plate interior nodes
Area 10 is respectively arranged and reinforces angle steel 11, reinforces peg 12 and bent-up bar 13；Reinforce angle steel 11 and be close to interim 1 surrounding of steel column,
By etc. strong welds connect with interim steel column 1；Reinforce peg 12 and is symmetrically arranged in interim 1 edge of a wing of steel column outside and web two
The plate interior nodes of side are reinforced in area 10；The uniform quadrature arrangement of bent-up bar 13 is reinforced in area 10 in plate interior nodes.By interim
Steel column 1 and permanent structure floor junction arranging plate interior nodes reinforce area, the connection of interim steel column 1 and permanent structure beam slab
Node has the advantages that punch resistant capability is strong, simple and beautiful, dismounting is convenient.Connecting node is used to be reinforced in the plate without exposed bolumn cap
Method, setting reinforces angle steel 11, reinforces peg 12 and bent-up bar 13 in structure floor, strengthens the Punching Shear of node
Can, further, since reinforcing node uses the construction being hidden in plate, therefore construction site is simple and beautiful, later period interim steel column 1
Cutting without exposed bolumn cap, convenient and efficient when dismounting, the smooth beauty of floor after dismounting.
In the present embodiment, it is highly preferred that it is easy for installation in order to guarantee, have preferably stress steady so that reinforcing angle steel 11
Qualitative, reinforcement angle steel 11 is horizontally disposed, and the upper surface for reinforcing angle steel 11 is greater than or equal at a distance from basement floor upper surface
The thickness of floorslab concrete protective layer reinforces angle steel 11 and chooses the length of interim steel column 1 equal to the length for reinforcing peg 12.
In the present embodiment, it is highly preferred that in order to enhance the Punching Shear energy between interim steel column 1 and permanent structure beam slab
Power is realized and reinforces way in the plate without exposed bolumn cap at the two connecting node, and the absolute altitude for reinforcing peg 12 is reinforcing angle steel 11
Lower part, reinforcement 12 diameter of peg are 19~32mm of Ф, reinforce 12 length of peg and are not less than 100mm.
In the present embodiment, more preferably, it is contemplated that the anchoring strength and the interim steel column 1 of guarantee of bent-up bar 13 are torn open
Except the smooth beauty of rear floor and node region, the transfer angle of bent-up bar 13 is 45 °, and diameter d is not less than 16mm, adjacent
Spacing between two bent-up bars 13 is not more than 200mm, and the selection of specific diameter and spacing is determined by Force Calculation；It bends up
The curved terminal in the lower part of reinforcing bar 13 is outer there are anchorage length la, and length is not less than 20d, and the top of bent-up bar 13 and temporary steel are vertical
1 contact position of column is truncated and is arranged the curved terminal in top, and the curved terminal point in top is arranged 90 ° of dog-ears, is arranged in and reinforces in angle steel 11.
In the present embodiment, it is highly preferred that floor construction and interim 1 node region of steel column, floor construction and permanent knot
Structure Column border node region is poured using slightly expanded concrete.The node region of floor construction and vertical member has stronger Punching Shear
And antidetonation, cracking resistance.Node region is poured using slightly expanded concrete, absorbs impact energy by the swelling fiber of specially treated
Amount, reduces the effect of concentrated stress, avoids the secondary cracking of permanent vertical member and interim vertical member when structure is converted.
In the present embodiment, it is highly preferred that pouring slightly expanded concrete region is joint strengthening area and joint strengthening area
Both sides outward each extension board across 1/3~1/5 region enclosed.Since node region stress is relatively concentrated, and interim steel column 1
When dismounting, permanent structure column and interim steel column there are stress check calculation, floor and interim 1 node region of steel column and floor with
Permanent structure Column border node region is also easy to produce crack.And the swelling fiber in slightly expanded concrete is due to taking at special surface
Reason, can make it together with cement base-material close adhesion, thus the effect for absorbing impact energy, reducing concentrated stress, therefore,
The node region uses slightly expanded concrete, and the anti-impact shearing stress and cracking resistance and anti-seismic performance, reduction that floor can be improved face
When steel column and the permanent structure column transition period concrete secondary crack.
In the present embodiment, it is highly preferred that setting up the space of framed bent when in order to reserve construction, the soil body thickness that excavates every time
Strict control is needed, the certain distance excavated in step 1 is 2 meters to 2.3 meters.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention.Ability
Any change, the modification that the technical staff in domain does according to the disclosure above content, belong to scope of protection of the claims.
Claims (8)
1. a kind of foundation pit of impermanent vertical support system is along inverse combining construction method, which comprises the steps of:
Step 1: the interim steel column of foundation pit, stand column pile, building enclosure construction are completed, excavates the first floor earthwork to basement roof mark
High following certain distance, with digging with pouring concrete bed course；
Step 2: erection construction framed bent, pouring construction basement roof structure；
Step 3: continue to excavate the second layer earthwork to the following certain distance of basement one floor absolute altitude, with digging with casting concrete
Bed course；
Step 4: erection construction framed bent, pouring construction basement one floor construction；
Step 5: continuing to be excavated to the following certain distance of underground N-1 floor plate absolute altitude, with digging with casting concrete bed course；
Step 6: erection construction framed bent, N-1 layers of pouring construction underground floor construction；
Step 7: earth excavation pours the concrete cushion at hole bottom to cheating bottom in time；
Step 8: pouring construction basement bottom board；
Step 9: the vertical member that N layers of pouring construction underground；
Step 10: the layer-by-layer pouring construction underground N-1 layers of vertical member to basement roof from the bottom to top, until it is whole to pour completion
The vertical member of a basement；
Step 11: the interim steel column of basement one is removed；
Step 12: from top to bottom successively removing the interim steel column of each floor, until the temporary steel for completing entire basement is vertical
Column is removed, and so far, completes the excavation of foundation pit and Underground Construction of entire basement.
2. the method according to claim 1, wherein the vertical member includes permanent structure column and wall.
3. the method according to claim 1, wherein the interim steel column is set with permanent structure floor junction
There are plate interior nodes to reinforce area, is respectively arranged and reinforces angle steel, reinforce peg and bent-up bar；It is vertical that the reinforcement angle steel is close to temporary steel
Column surrounding, by etc. strong welds connect with interim steel column；The reinforcement peg is symmetrically arranged on the outside of the interim steel column edge of a wing
And the plate interior nodes of web two sides are reinforced in area；The uniform quadrature arrangement of bent-up bar is reinforced in area in plate interior nodes.
4. according to the method described in claim 3, reinforcing the upper table of angle steel it is characterized in that, the strengthens angle steel is horizontally disposed
Face is greater than or equal to the thickness of floorslab concrete protective layer at a distance from basement floor upper surface, and angle steel chooses the length of steel column
Degree is equal to the length for reinforcing peg.
5. according to the method described in claim 3, it is characterized in that, reinforce peg absolute altitude reinforce angle steel lower part, it is described
Reinforcement peg diameter is 19~32mm of Ф, reinforces peg length and is not less than 100mm.
6. according to the method described in claim 3, diameter d is not it is characterized in that, the transfer angle of the bent-up bar is 45 °
Less than 16mm, the spacing between adjacent two bent-up bars is not more than 200mm, and the selection of specific diameter and spacing passes through stress meter
It calculates and determines；The curved terminal in the lower part of bent-up bar is outer there are anchorage length la, and length is not less than 20d, the top of bent-up bar with
Interim steel column contact position is truncated and is arranged the curved terminal in top, and the curved terminal point in top is arranged 90 ° of dog-ears, is arranged in reinforcement angle steel
It is interior.
7. the method according to claim 1, wherein intersecting with basement floor lower surface from interim steel column
It is joint strengthening area that point, which throws the region in the obtained horizontal projected area of 45° angle toward floor upper surface,.
8. the method according to the description of claim 7 is characterized in that pour slightly expanded concrete region be joint strengthening area and
Joint strengthening area both sides outward each extension board across 1/3~1/5 region enclosed.
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| CN201910172127.4A CN109944250B (en) | 2019-03-07 | 2019-03-07 | Foundation pit forward and backward combined construction method of non-permanent vertical supporting system |
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Cited By (8)
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| CN110439002A (en) * | 2019-07-18 | 2019-11-12 | 中国建筑第四工程局有限公司 | A kind of interim horizontal structure of inner support is used as the method for permanent structure beam slab |
| CN110485461A (en) * | 2019-07-26 | 2019-11-22 | 上海建工二建集团有限公司 | A kind of drop board construction method of underground structure |
| CN111779027A (en) * | 2020-08-18 | 2020-10-16 | 北京中岩智泊科技有限公司 | Construction method for constructing underground garage through cover-excavation top-down construction |
| CN112922353A (en) * | 2021-02-01 | 2021-06-08 | 中建八局第三建设有限公司 | Construction method for forward and reverse combination of steel structure frame outer curtain wall |
| CN112922025A (en) * | 2021-01-18 | 2021-06-08 | 中铁第四勘察设计院集团有限公司 | Reverse construction method of underground structure |
| CN113502852A (en) * | 2021-07-07 | 2021-10-15 | 中铁一局集团(广州)建设工程有限公司 | Subway station cover excavation top-down construction structure and construction method thereof |
| CN114457810A (en) * | 2022-01-26 | 2022-05-10 | 中铁第一勘察设计院集团有限公司 | Foundation pit inner support system based on permanent-temporary combination and construction method thereof |
| CN117144977A (en) * | 2023-10-26 | 2023-12-01 | 上海建工集团股份有限公司 | Method for constructing residential building basement by reverse construction method column drawing |
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| CN110439002A (en) * | 2019-07-18 | 2019-11-12 | 中国建筑第四工程局有限公司 | A kind of interim horizontal structure of inner support is used as the method for permanent structure beam slab |
| CN110485461A (en) * | 2019-07-26 | 2019-11-22 | 上海建工二建集团有限公司 | A kind of drop board construction method of underground structure |
| CN111779027A (en) * | 2020-08-18 | 2020-10-16 | 北京中岩智泊科技有限公司 | Construction method for constructing underground garage through cover-excavation top-down construction |
| CN112922025A (en) * | 2021-01-18 | 2021-06-08 | 中铁第四勘察设计院集团有限公司 | Reverse construction method of underground structure |
| CN112922353A (en) * | 2021-02-01 | 2021-06-08 | 中建八局第三建设有限公司 | Construction method for forward and reverse combination of steel structure frame outer curtain wall |
| CN112922353B (en) * | 2021-02-01 | 2022-04-12 | 中建八局第三建设有限公司 | Construction method for forward and reverse combination of steel structure frame outer curtain wall |
| CN113502852A (en) * | 2021-07-07 | 2021-10-15 | 中铁一局集团(广州)建设工程有限公司 | Subway station cover excavation top-down construction structure and construction method thereof |
| CN114457810A (en) * | 2022-01-26 | 2022-05-10 | 中铁第一勘察设计院集团有限公司 | Foundation pit inner support system based on permanent-temporary combination and construction method thereof |
| CN117144977A (en) * | 2023-10-26 | 2023-12-01 | 上海建工集团股份有限公司 | Method for constructing residential building basement by reverse construction method column drawing |
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