CN110004988A - The protective device and method in a kind of extubation construction underground continuous wall connector hole - Google Patents
The protective device and method in a kind of extubation construction underground continuous wall connector hole Download PDFInfo
- Publication number
- CN110004988A CN110004988A CN201910109604.2A CN201910109604A CN110004988A CN 110004988 A CN110004988 A CN 110004988A CN 201910109604 A CN201910109604 A CN 201910109604A CN 110004988 A CN110004988 A CN 110004988A
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- China
- Prior art keywords
- wall
- connector hole
- bucket body
- protective device
- nipple orifice
- Prior art date
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- 230000001681 protective effect Effects 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 19
- 210000002445 nipple Anatomy 0.000 claims abstract description 51
- 230000001012 protector Effects 0.000 claims abstract description 20
- 239000000725 suspension Substances 0.000 claims abstract description 20
- 230000005484 gravity Effects 0.000 claims abstract description 17
- 208000036829 Device dislocation Diseases 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
Abstract
The invention discloses the protective devices and method in a kind of extubation construction underground continuous wall connector hole.The protective device in a kind of extubation construction underground continuous wall connector hole, comprising: be fixed on the fixing protector in nipple orifice internal upper part region, there is the semi arch cylinder being bonded with connector hole wall, for protecting nipple orifice upper area；It is mounted on grooving bucket body and with the mobile protective device that the grooving bucket body moves from top to bottom from nipple orifice top following region, there is the arc panel being bonded with connector hole wall, for protecting nipple orifice top following region；Wherein, the distance between the outermost of the arc panel and grooving bucket body center of gravity be equal to grooving bucket body free suspension when bucket tooth outermost to grooving bucket body center of gravity at a distance from adjunction head bore radius.The present invention can promote and improve the connector construction quality of diaphram wall.
Description
Technical field
The present invention relates to underground continuous wall construction technique field more particularly to a kind of extubation construction underground continuous wall connectors
The protective device and method in hole.
Background technique
Diaphragm Wall is firstly introduced into domestic hydroelectric project field the fifties, has been widely used in domestic soil
The underground space supporting of the engineering fields such as Wood construction, municipal traffic, the water conservancy energy and environmental protection, underground water antiseepage, which is cut, seeps work
Journey.Diaphram wall is usually underground concealed engineering, and jointing is wall weak location, is to embody construction quality and antiseepage
The key of performance, the quality of connector directly affect the total quality of entire underground engineering, engineering service life and operating cost.
Current tube pulling method construction underground continuous wall connector has become the main technique of domestic underground continuous wall connector connection.Greatly
The diaphram wall engineering practice of amount shows that underground continuous wall connector defect is the common common fault of construction of diaphragm wall, mainly
The reason is that when constructing the second stage of slot, since the grooving equipment of the operation under mud is gone up and down by suspension cable, thus grooving bucket body
It will shake left and right when excavation, so that grooving bucket tooth easily damages not high half round splce of fist stage concrete of formed but intensity, shape
At irregular concrete male and female face, so that the later period can not thoroughly scrub clean connector, when concreting, easily blends mudcake
Sundries, it is likely that form fault in seam, and then form the security risk of concealed work, increase post-processing and maintenance cost.Thing
In reality in the actual construction process, in order to avoid generation security risk, it will usually be backfilled again to the region of grooving bucket tooth damage
New concrete extends construction period to increase concrete loss and waste.
Summary of the invention
The object of the invention is in order to overcome the above-mentioned problems of the prior art, provide under a kind of extubation construction ground
The protective device in continuous wall connector hole can promote and improve the connector construction quality of diaphram wall.
It is a further object of the present invention to provide a kind of guard methods in extubation construction underground continuous wall connector hole.
In order to realize the first object of the present invention, the following technical schemes are provided:
The protective device in a kind of extubation construction underground continuous wall connector hole, comprising: be fixed on nipple orifice internal upper part region
Fixing protector, there is the semi arch cylinder that is bonded with connector hole wall, for protecting nipple orifice upper area；It is mounted on
On grooving bucket body and with the mobile protective device that the grooving bucket body moves from top to bottom from nipple orifice top following region, tool
There is the arc panel being bonded with connector hole wall, for protecting nipple orifice top following region；Wherein, the outermost of the arc panel with
The distance between grooving bucket body center of gravity be equal to grooving bucket body free suspension when bucket tooth outermost to grooving bucket body center of gravity distance
The radius of adjunction head bore.
Preferably, the outer wall of the semi arch cylinder is bonded with the connector hole wall in nipple orifice internal upper part region, on inner wall
End and lower end are equipped with cylinder reinforcing member.
Preferably, the semi arch cylinder across the crossbeam on guide wall of underground continuous wall by being suspended in nipple orifice；
The top layout of the semi arch cylinder has two suspension hanging rings for wearing the crossbeam.
Preferably, described two suspension hanging rings are symmetrical arranged, and the line of two suspension hanging rings is than the semi arch cylinder
Center of gravity will close to the semi arch cylinder the center of circle.
Preferably, the mobile protective device further include: for the arc panel to be mounted under the ladder of grooving bucket body
The support frame in portion.
Preferably, the arc panel includes: that its shape matches with the connector hole wall of nipple orifice top following region
Curved plate；It is fixed on the yielding rubber plate of the curved plate outer wall.
Preferably, support frame as described above includes: the vertical plate for being welded on the curved plate inner wall, upper level board and lower level
Plate；Wherein, the vertical plate is arranged between the upper level board and lower horizontal board.
Preferably, the ladder lower part of the grooving bucket body is equipped with the connection frame of fixed support frame as described above, the connection frame packet
It includes: for fixing the upper junction plate of the upper level board；For fixing the lower connecting plate of the vertical plate；
Wherein, the upper junction plate is vertically arranged with the lower connecting plate.
In order to realize the second object of the present invention, the following technical schemes are provided:
The guard method in a kind of extubation construction underground continuous wall connector hole, comprising: fixed in nipple orifice internal upper part region
Fixing protector has the semi arch cylinder being bonded with connector hole wall, for protecting nipple orifice upper area；In grooving bucket
The mobile protective device that moves from top to bottom with grooving bucket body from nipple orifice top following region is installed on body, is had and connector
The arc panel of hole wall fitting, for protecting nipple orifice top following region；Wherein, the outermost of the arc panel and grooving bucket body
The outermost of bucket tooth is to grooving bucket body center of gravity apart from adjunction head bore when the distance between center of gravity is equal to grooving bucket body free suspension
Radius.
The beneficial effects of the present invention are embodied in following aspect: protective device processing of the present invention and easy to use and flexible, can week
Turn to use, during the second phase grooving of underground diaphragm wall can be effectively reduced, damage to formed semicircle concrete joint hole,
The joint geometry and seam length of wall are kept, concrete amount is saved, avoids the occurrence of underground continuous wall connector defect, it is ensured that ground
Lower diaphragm wall construction quality, the diaphram wall engineering of the various depth suitable for extubation construction joint.
Detailed description of the invention
Fig. 1 is the top view of fixing protector use state of the invention；
Fig. 2 is the A-A cross-sectional view of fixing protector use state of the invention；
Fig. 3 is the scheme of installation of mobile protective device of the invention on grooving bucket body；
Fig. 4 is the top view of mobile protective device of the invention in use state；
Fig. 5 is E-E cross-sectional view shown in Fig. 4；
Fig. 6 is use block diagram of the invention.
Description of symbols: 1- fixing protector；11- semi arch cylinder；12- hangs hanging ring；13- hoisting ring；14- is horizontal
Beam；15,16- cylinder reinforcing member；2- moves protective device；21- curved plate；22- yielding rubber plate；The upper level board of 23-；24-
Lower horizontal board；25- vertical plate；26- upper junction plate；27- lower connecting plate；28- bolt；3- grooving bucket body；31- ladder；32- bucket
Tooth；I- operation platform；II- leads wall；III- fist stage concrete wall section；IV- mono- phase nipple orifice；V- second phase slot section；VI- borehole cleaning changes slurry
Slot；VII- second phase slot concrete；The complete connector seam of VIII-.
Specific embodiment
The present invention provides the protective device and method in a kind of extubation construction underground continuous wall connector hole, for connecting to underground
The formed nipple orifice that continuous one phase of wall slot section pours end, junction block tube drawing is completed is protected.
The protective device and method in the extubation construction underground continuous wall connector hole provided through the invention, can improve biography
Unite tube pulling method construction diaphram wall process flow so that the technical ability factor for being protected from grooving operating personnel of nipple orifice and
Grooving equipment performance influences, and promotes and improve the connector construction quality of diaphram wall.
The present invention is described in detail with reference to the accompanying drawings and examples.
The present embodiment provides a kind of protective devices in extubation construction underground continuous wall connector hole, comprising: is fixed on connector
The fixing protector 1 in hole internal upper part region, for protecting nipple orifice upper area, buffering dispersion grooving bucket body is issuable
Dock the collision of head bore upper area；Be mounted on grooving bucket body and with grooving bucket body from nipple orifice top following region from upper and
Grooving bucket body is limited in suitable position, kept away by the mobile protective device 2 of lower movement for protecting nipple orifice top following region
Formed nipple orifice is grabbed or broken to the bucket tooth 32 for exempting from grooving bucket body.
At the second stage of slot grooving initial stage, due to the non-uniform influence of stratum compactness, top hangs skyborne grooving bucket body and exists
Double swerve can be generated in operating process or even collides nipple orifice, and excessive shaking and collision can be applied to of the invention consolidate first
Determine in protective device 1, fixing protector 1 avoids formed concrete joint hole by physics partition, dispersion and buffer function
Damage, and play docking head bore protective effect.With the progress of excavation, after the ladder of grooving bucket body submerges high viscosity mud
Double swerve will receive the constraint of itself center of gravity and mud, the energy and amplitude of shaking become smaller, therefore fixed protection dress
It is laid special stress on protecting in the region for setting the 1 15 meters of depth in docking head bore top.
With the progress of excavation, the present invention passes through mobile protective device 2 and docks the region progress below of 15 meters of depth of head bore
Protection, the bucket tooth that the position dimension of mobile protective device 2 can limit grooving bucket body, which touches, grabs formed semi-circular joint hole coagulation
Soil structure, while buffering peptizaiton is also functioned to, and then dock head bore and protected from top to bottom.
It is used cooperatively by fixing protector 1 and mobile protective device 2, it can be to the diaphram wall of various depth
Tube drawing connector realizes full depth protection.
Specifically, as illustrated in fig. 1 and 2, fixing protector 1 includes: the semi arch cylinder that its outer wall is bonded with connector hole wall
Cylinder reinforcing member 15,16 is respectively welded in body 11, inner wall top and bottom, can become to avoid the collision by grooving bucket body
Shape.In addition, 11 inside of semi arch cylinder is not provided with barrier up and down, in order to which grooving bucket body excavates the second stage of slot construction up and down,
Without changing original operation mode.
When implementation, semi arch cylinder 11 is rolled using the steel plate of 1cm or more, semicircle cambered surface and nipple orifice arc shape phase
It coincide, in order to which outer wall and the connector hole wall of semi arch cylinder 11 fit.
Wherein, two symmetrically arranged suspensions for being used to wear crossbeam 14 are welded in two sides at the top of the inner wall of semi arch cylinder 11
Hanging ring 12, and the arc center welding at the top of inner wall is for lifting by crane and fixing the hoisting ring 13 of insurance steel cable.Such as Fig. 2 institute
Show, across on guide wall of underground continuous wall II, semi arch cylinder 11 is suspended in nipple orifice by crossbeam 14 at the both ends of crossbeam 14
Upper area.When implementation, the bar bending that 25mm diameter or more can be used in suspension hanging ring 12 is U-shaped, and internal diameter is greater than 50mm, with half
Circular arc cylinder 11 welds.
In order to rely on the semi arch cylinder 11 of suspension from Beijing South Maxpower Technology Co. Ltd naturally close to connector hole wall, mobile protective device is not influenced
2 move up and down along connector hole wall, and when design will be such that the center of gravity of semi arch cylinder 11 is located on the outside of the line of two suspension hanging rings 12,
I.e. two suspension hanging ring 12 line than semi arch cylinder 11 center of gravity close to the center of circle of semi arch cylinder 11.
As shown in Fig. 3 to 5, mobile protective device 2 includes: the arc panel being bonded with connector hole wall；For arc panel to be pacified
Mounted in the support frame of grooving bucket body 3.Wherein, 31 lower part of ladder of grooving bucket body 3 is equipped with the connection frame of fixing support rack.
Wherein, as shown in figure 4, arc panel includes: the curved plate 21 coincideing with connector shape of hole wall；Rivet clasp is fitted in
The yielding rubber plate 22 of 21 outer wall of curved plate.
As shown in Figures 4 and 5, support frame include: the vertical plate 25 for being welded on 21 inner wall of curved plate, upper level board 23 and under
Level board 24；Wherein, vertical plate 25 is between upper level board 23 and lower horizontal board 24.
Connection frame includes: the upper junction plate 26 for fixed upper level board 23；For fixing the lower connecting plate of vertical plate 25
27；Wherein, upper junction plate 26 is vertically arranged with lower connecting plate 27.
When implementation, curved plate 21 is rolled using the steel plate of thickness 15mm or so, height 40cm or so, arc length about a quarter
Nipple orifice perimeter.It is bonded yielding rubber plate 22 thickness 10mm or so of the rivet clasp on 21 outer wall of curved plate.It is welded on curved plate
The thickness of the vertical plates 25 of 21 inner walls, upper level board 23 and lower horizontal board 24 is in 15mm or more, when it is implemented, such as Figure 4 and 5 institute
Show, upper level board 23 opens up the bolt hole of two 40mm diameter above with the connecting portion of ladder；The company of vertical plate 25 and ladder
Socket part position opens up the bolt hole of a 40mm diameter above, and makes three bolts hole on a vertical plane；It is welded on ladder
The upper junction plate 26 of 31 lower parts and the thickness of lower connecting plate 27 are opened up in 15mm or more, and in the corresponding site of upper junction plate 26
The bolt hole of two 40mm diameter above opens up the bolt hole of a 40mm diameter above in the corresponding site of lower connecting plate 27,
So that upper level board 23 is connect with upper junction plate 26 using two M35 or more bolts 28, vertical plate 25 and lower connecting plate 27 are used
One M35 or more bolt 28 connects, and corresponding bolt 28 can be interchanged, and has biggish deformation adaptability.
Mobile protective device 2 is up and down with grooving bucket body 3 in the following range of nipple orifice upper area, only contacts a phase
The intermediate intensity and globality of nipple orifice limit the bucket tooth 32 of grooving bucket body 3 in opening and closing and crawl process compared with high concrete part
In position, avoid damaging molded concrete joint pore structure.Need to make when specifically, implementing the outermost of arc panel at
The distance of outermost to the grooving bucket body center of gravity of bucket tooth adds when the distance between 3 center of gravity of slot bucket body is equal to grooving bucket body free suspension
The radius of nipple orifice, limitation of the opening and closing and crawl position of bucket tooth 32 by arc panel, avoids when ensuring that grooving bucket body 3 excavates
Damage nipple orifice.
As shown in fig. 6, being walked to the use of the protective device in extubation provided by the invention construction underground continuous wall connector hole
It is rapid as follows:
A. extubation construction forming one phase of the diaphram wall nipple orifice IV of the prior art is used, and clears up a phase nipple orifice
Sundries and wall II and operation platform I are nearby led at the top of IV；
B. fixing protector 1 and mobile guarantor are prepared according to the wall thickness of diaphram wall, the length of slot section and equipment feature
Protection unit 2；
Fixing protector 1 is lifted to a phase nipple orifice IV internal upper part region by hoisting ring 13, and straight using 40mm
The crossbeam 14 of diameter is fixed on by two symmetrical suspension hanging ring 12 suspensions and is led on wall II, guarantees the fixing protector fixed
1 semi arch cylinder 11 is bonded naturally with the hole wall of a phase nipple orifice IV, fastens safety rope by hoisting ring 12, avoids fixed guarantor
In 1 accident collision falling hole of protection unit；
C. second phase slot section V close to a phase nipple orifice IV position excavate before, check again for fixing protector 1 whether position
Correctly, whether safety rope is fastened；The top that hole position alignment carries out the second stage of slot section V is excavated, and fixing protector 1 is to a phase nipple orifice
IV upper area shields；
D. when the second stage of slot section V cutting depth is close to 1 bottom of fixing protector, lift grooving bucket body, in ladder lower part
Mobile protective device 2 is installed, it is ensured that be bolted normally, to protect to fixing protector 1 with the nipple orifice of lower portion
Under the conditions of trenching construction；
E. second phase slot section V is excavated, until the excavation and clear bottom, bottom hole of completing entire slot are cleaned to after hole depth i.e. removable
Fixing protector 1 and mobile protective device 2, and the flushing of protective device 1 and mobile protective device 2 is fixed immediately, with
It is used when standby next nipple orifice construction；
F. after changing slurry by code requirement borehole cleaning, carry out second phase slot concrete VII and pour, due to a phase nipple orifice IV by
Protection of the invention, forms complete connector seam VIII from top to bottom, and the probability for fault in seam occur will be greatly reduced.
Protective device and method of the present invention have the advantage that
It is processed using general steel plate, processing is relatively easy, and installing and dismounting uses building site existing equipment, and can have enough to meet the need for a long time makes
With maintenance is relatively easy；Damage of the traditional handicraft to formed nipple orifice can be effectively reduced, underwater concrete construction damage is reduced
Consumption；Most importantly can the biggish probability for reducing the rift defects such as connector clamp mud, promote the fining construction of diaphram wall
It is horizontal；And then later period Anti-seeping technology and maintenance cost are reduced, largely prevent the security risk of diaphram wall concealed work；
It is suitble to the engineering of the extubation construction diaphram wall of various depth, can satisfy most stringent of seam and antiseepage requirement.
Although above-mentioned elaborate the present invention, however, the present invention is not limited thereto, those skilled in the art can
It is modified with principle according to the present invention, therefore, the various modifications that all principles according to the invention carry out all should be understood as
Fall into protection scope of the present invention.
Claims (9)
1. a kind of protective device in extubation construction underground continuous wall connector hole characterized by comprising
It is fixed on the fixing protector in nipple orifice internal upper part region, there is the semi arch cylinder being bonded with connector hole wall, is used
In protection nipple orifice upper area；
The mobile guarantor for being mounted on grooving bucket body and being moved from top to bottom with the grooving bucket body from nipple orifice top following region
Protection unit has the arc panel being bonded with connector hole wall, for protecting nipple orifice top following region；
Wherein, bucket tooth when the distance between the outermost of the arc panel and grooving bucket body center of gravity are equal to grooving bucket body free suspension
Outermost to grooving bucket body center of gravity the radius apart from adjunction head bore.
2. the protective device in extubation construction according to claim 1 underground continuous wall connector hole, which is characterized in that described
The outer wall of semi arch cylinder is bonded with the connector hole wall in nipple orifice internal upper part region, and inner wall top and bottom are reinforced equipped with cylinder
Part.
3. the protective device in extubation construction according to claim 2 underground continuous wall connector hole, which is characterized in that described
Semi arch cylinder across the crossbeam on guide wall of underground continuous wall by being suspended in nipple orifice；The top of the semi arch cylinder
It is disposed with two suspension hanging rings for wearing the crossbeam.
4. the protective device in extubation construction according to claim 3 underground continuous wall connector hole, which is characterized in that described
Two suspension hanging rings are symmetrical arranged, and the line of two suspension hanging rings than the semi arch cylinder center of gravity close to the semicircle
The center of circle of arc cylinder.
5. the protective device in extubation construction according to claim 4 underground continuous wall connector hole, which is characterized in that described
Mobile protective device further include: for the arc panel to be mounted on to the support frame of the ladder lower part of grooving bucket body.
6. the protective device in extubation construction according to claim 5 underground continuous wall connector hole, which is characterized in that described
Arc panel includes:
The curved plate that its shape matches with the connector hole wall of nipple orifice top following region；
It is fixed on the yielding rubber plate of the curved plate outer wall.
7. the protective device in extubation construction according to claim 6 underground continuous wall connector hole, which is characterized in that described
Support frame includes: the vertical plate for being welded on the curved plate inner wall, upper level board and lower horizontal board；Wherein,
The vertical plate is arranged between the upper level board and lower horizontal board.
8. the protective device in extubation construction according to claim 7 underground continuous wall connector hole, which is characterized in that described
The ladder lower part of grooving bucket body is equipped with the connection frame of fixed support frame as described above, and the connection frame includes:
For fixing the upper junction plate of the upper level board；
For fixing the lower connecting plate of the vertical plate；
Wherein, the upper junction plate is vertically arranged with the lower connecting plate.
9. a kind of guard method in extubation construction underground continuous wall connector hole characterized by comprising
In the fixed fixing protector in nipple orifice internal upper part region, there is the semi arch cylinder being bonded with connector hole wall, be used for
Protect nipple orifice upper area；
The mobile protective device moved from top to bottom with grooving bucket body from nipple orifice top following region is installed on grooving bucket body,
It has the arc panel being bonded with connector hole wall, for protecting nipple orifice top following region；
Wherein, bucket tooth when the distance between the outermost of the arc panel and grooving bucket body center of gravity are equal to grooving bucket body free suspension
Outermost to grooving bucket body center of gravity the radius apart from adjunction head bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109604.2A CN110004988B (en) | 2019-02-11 | 2019-02-11 | Protection device and method for joint hole of underground diaphragm wall constructed by tube drawing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109604.2A CN110004988B (en) | 2019-02-11 | 2019-02-11 | Protection device and method for joint hole of underground diaphragm wall constructed by tube drawing method |
Publications (2)
| Publication Number | Publication Date |
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| CN110004988A true CN110004988A (en) | 2019-07-12 |
| CN110004988B CN110004988B (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910109604.2A Active CN110004988B (en) | 2019-02-11 | 2019-02-11 | Protection device and method for joint hole of underground diaphragm wall constructed by tube drawing method |
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| CN (1) | CN110004988B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351727A (en) * | 2022-01-11 | 2022-04-15 | 上海市基础工程集团有限公司 | Temporary supporting device for grooving section of underground diaphragm wall |
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