CN206694041U - For administering the combining structure of floor lift in gallery - Google Patents
For administering the combining structure of floor lift in gallery Download PDFInfo
- Publication number
- CN206694041U CN206694041U CN201720532350.1U CN201720532350U CN206694041U CN 206694041 U CN206694041 U CN 206694041U CN 201720532350 U CN201720532350 U CN 201720532350U CN 206694041 U CN206694041 U CN 206694041U
- Authority
- CN
- China
- Prior art keywords
- channel
- section steel
- steel
- section
- steel frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
It the utility model is related to a kind of combining structure for being used to administer floor lift in gallery, first support includes the cross U-steel frame that two channel-section steel square crossings are formed, two channel-section steels of cross U-steel frame are provided at both ends with the first arch channel-section steel, and the both ends of the first arch channel-section steel are provided with the first anchor pole with the channel-section steel both ends junction of cross U-steel frame；Second support includes I-shaped U-steel frame, two parallel channel-section steels of I-shaped U-steel frame are provided at both ends with the second arch channel-section steel, the both ends of second arch channel-section steel channel-section steel both ends parallel with the two of I-shaped U-steel frame junction is provided with the second anchor pole, first, second support is alternately arranged along tunnel length direction, by the stress of roadway floor vertical direction, into space, other directions are shifted, and form an entirety, common stress；Not being rigidly connected between first, second support being alternately arranged can ensure to be not in overall destruction, and first, second supporting structure can be prefabricated on well, convenient quickly of constructing, and bottom distension regulation effect is good.
Description
Technical field
It the utility model is related to roadway construction technical field, and in particular to a kind of combination knot for being used to administer floor lift in gallery
Structure.
Background technology
Enter deep mining with most of collieries in China, increase year by year with geological conditions increasingly with the buried depth in tunnel
Complexity, stability problem have been increasingly becoming the subject matter of roadway surrounding rock and construction safety control, and bring very severe
Challenge.And bottom distension problem is one of key issue of coal mine roadway surrounding rock stability control.It is existing in order to effectively suppress bottom distension problem
There is the measure that a series of preventing and treating bottom distension in technology be present.
Conventional prophylactico-therapeutic measures has concrete anti-arch terrace, deep Shallow hole grouting, high-ground stress combination of steel rope, anchor of backbreaking to be injected back into
Fill out technology and grooving release and reinforce a series of technologies such as side angle.The appearance of bottom distension problem is primarily due to weak surrounding rock in height
In the case of crustal stress, caused by Rheological Deformation is excessive.In a kind of passive protecting scheme of above-mentioned concrete anti-arch terrace, by force
Degree can reach the requirement of supporting, but compatible deformation is unable between supporting and country rock so that country rock can not effectively discharge stress and
The destruction of big section is often presented when ftractureing, and destroying；Grooving release and anchor of backbreaking are injected back into the active support for filling out one kind
In scheme, although solving the problems, such as supporting from the mechanical property for improving country rock and by stress in terms of deep shifts two,
It is its cost compared with rigid protection height and may be wrecked again because of the stress state of external force action breaks down country rock.
Utility model content
The purpose of this utility model is to provide a kind of combining structure for being used to administer floor lift in gallery, using the teaching of the invention it is possible to provide enough branch
Intensity is protected, and is mutually coordinated with surrouding rock deformation, country rock is reduced and the situation of stress concentration is being occurred by stress.
To achieve the above object, the technical scheme of this combining structure utility model use is：
For administering the combining structure of floor lift in gallery, including first, second support of tunnel bottom is arranged on, described first
Support includes the cross U-steel frame that two channel-section steel square crossings are formed, and the both ends of two channel-section steels of the cross U-steel frame intersect respectively to be set
It is equipped with the first opening up arch channel-section steel, the both ends of the first arch channel-section steel and the channel-section steel both ends junction of cross U-steel frame
Be respectively arranged with the first anchor pole and be plugged on tunnel bottom, two channel-section steels of the cross U-steel frame respectively with the length direction in tunnel and
Width is parallel；
The second support includes I-shaped U-steel frame, and two parallel channel-section steel both ends of the I-shaped U-steel frame are respectively arranged with out
The the second arch channel-section steel of mouth upward, both ends channel-section steel both ends parallel with the two of the I-shaped U-steel frame junction of the second arch channel-section steel
It is respectively arranged with the second anchor pole and is plugged on tunnel bottom, two parallel channel-section steels of the I-shaped U-steel frame and the length direction in tunnel is put down
OK；
First, second support is alternately arranged along tunnel length direction and the cross U-steel frame of first support stretches into
Region between two parallel channel-section steels of the I-shaped U-steel frame of two supports.
The also existing supplementary features of the utility model are：
Two channel-section steel both ends of the cross U-steel frame are respectively arranged with the first channel-section steel, and the base surface of first channel-section steel is horizontal
And first the upper end of anchor pole be separately fixed in base surface, two parallel channel-section steel both ends of the I-shaped U-steel frame are respectively arranged with
Two channel-section steels, the base surface of second channel-section steel is horizontal and the upper end of the second anchor pole is separately fixed in base surface.
First anchor pole at the both ends of the channel-section steel parallel with span length direction tilts laterally in the cross U-steel frame prolongs
Stretch, second anchor pole is also located at two parallel channel-section steel middle position arrangements of I-shaped U-steel frame and the second anchor pole of the opening position
Extension is tilted laterally.
The first anchor pole upper end in the cross U-steel frame on the channel-section steel parallel with span length direction is arranged to thread segment
And the channel-section steel upper face of cross U-steel frame is stretched out, the threaded connection section of the first anchor pole is arranged with the first pad, first pad
Overall to have angle face in column jecket shape and one end cutting, the angle face of first pad is fitted in the upper face of channel-section steel, the work
The threaded upper ends linkage section of second anchor pole in two parallel channel-section steel centre positions of word U-steel frame is arranged with the second pad, and described second
Pad integrally has angle face in column jecket shape and one end cutting, and the angle face of second pad is fitted in the upper face of channel-section steel.
Buffer rubber gasket is respectively arranged with the outside cell wall of first channel-section steel and the second channel-section steel.
The bottom in the tunnel is disposed with foam concrete bed course, and first, second support is sequentially fixed at foam and mixed
On solidifying soil padding.
By the structure for first, second support being alternately arranged, by the stress of roadway floor vertical direction into space its
He shifts in direction, and forms an entirety, common stress；It is not rigidly connected between first, second support being alternately arranged
It can ensure to be not in overall destruction, and first, second supporting structure all can be prefabricated on well, while it is convenient fast to construct
Speed, bottom distension regulation effect, for first, second above-mentioned support in practice of construction, in tunnel, extraneous welded and installed in advance is good
Afterwards, and integrally move in tunnel, can so substantially reduce the engineering time, reduce construction cost.
Brief description of the drawings
Fig. 1 is the structural representation for being located at roadway floor arrangement for administering the combining structure of floor lift in gallery；
Fig. 2 is for administering the first support structural representation in the combining structure of floor lift in gallery；
Fig. 3 is for administering the second support structural representation in the combining structure of floor lift in gallery；
Fig. 4 is the II enlarged drawings in Fig. 1；
Fig. 5 is the I enlarged drawings in Fig. 1.
Embodiment
With reference to Fig. 1 to Fig. 5, the utility model is further described：
For administering the combining structure of floor lift in gallery, including it is arranged on first, second support 10,20 of tunnel bottom, institute
State first support 10 include two channel-section steel square crossings form cross U-steel frame 11, the two of two channel-section steels of the cross U-steel frame 11
End is respectively arranged with the first opening up arch channel-section steel 12, both ends and the cross U-steel frame 11 of the first arch channel-section steel 12
Channel-section steel both ends junction is respectively arranged with the first anchor pole (anchor cable) 13 and is plugged on tunnel bottom, two grooves of the cross U-steel frame 11
Steel is parallel with the length direction and width in tunnel respectively；
The second support 20 includes I-shaped U-steel frame 21, and two parallel channel-section steel both ends of the I-shaped U-steel frame 21 are set respectively
It is equipped with the second opening up arch channel-section steel 22, the both ends of the second arch channel-section steel 22 and two parallel slots of I-shaped U-steel frame 21
Steel both ends junction is respectively arranged with the second anchor pole (anchor cable) 23 and is plugged on tunnel bottom, and the two of the I-shaped U-steel frame 21 are parallel
Channel-section steel is parallel with the length direction in tunnel；
First, second support 10,20 is alternately arranged along tunnel length direction and the cross channel-section steel of first support 10
The region that frame 11 is stretched between two parallel channel-section steels of the I-shaped U-steel frame 21 of second support 20；
With reference to shown in Fig. 1, in the mode of the cross U-steel frame 11 of the first arch channel-section steel 12 connection of above-mentioned first support 10,
The length direction and width that the pressure of the application of roadway floor can be located to tunnel decompose, should so as to reduce roadway floor
The situation that power is concentrated, and the first support 10 of the second support 20 of said structure and said structure is respectively along the length in tunnel
Direction is alternately arranged, and is not rigidly connected between first, second support 10,20 being alternately arranged, it can be ensured that tunnel bottom
Plate is not in overall destruction, and by the stress of roadway floor vertical direction, into space, other directions are shifted, and form one
It is overall, common stress, so as to provide enough supporting intensities to roadway floor, reduce country rock and answered by stress
The situation that power is concentrated；
First, second above-mentioned support 10,20 is split-type structural, and between each structure independently of each other, therefore
Can in advance will be each outside tunnel between parts be welded, and by inside support global transfer to the tunnel being welded,
Therefore constructed outside tunnel, ultrahigh in efficiency, and construction cost can be substantially reduced.
As preferred scheme of the present utility model, with reference to shown in Fig. 2 and Fig. 3, two channel-section steels two of the cross U-steel frame 11
End is respectively arranged with the first channel-section steel 14, and the base surface of first channel-section steel 14 is horizontal and the upper end of the first anchor pole (anchor cable) 13 is distinguished
It is fixed in base surface, two parallel channel-section steel both ends of the I-shaped U-steel frame 21 are respectively arranged with the second channel-section steel 24, and described second
The base surface of channel-section steel 24 is horizontal and the upper end of the second anchor pole (anchor cable) 23 is separately fixed in base surface；
Above-mentioned first, second anchor pole (anchor cable) 13,23 is separately fixed at the groove of first, second above-mentioned channel-section steel 14,24
In base surface, the stress born of first, second anchor pole (anchor cable) 13,23 all discharges the groove in first, second channel-section steel 14,24
On baseplane, apply situation about excessively being concentrated to the stress of first, second support 10,20 so as to notable less anchor pole.
Further preferred scheme, the of the both ends of the channel-section steel parallel with span length direction in the cross U-steel frame 11
One anchor pole 13 tilts extension laterally, and second anchor pole (anchor cable) 23 is also located among two parallel channel-section steels of I-shaped U-steel frame 21
Opening position is arranged and the second anchor pole (anchor cable) 23 of the opening position tilts extension laterally；
Above-mentioned first, second anchor pole (anchor cable) 13,23 being fixed at the disposition of feet of tunnel is in tilted layout laterally respectively,
So as to effectively alleviate the stress concentration at the disposition of feet of tunnel.
Specifically, with reference to shown in Fig. 2 and Fig. 3, and shown in Fig. 4 and Fig. 5, in the cross U-steel frame 11 with span length
The upper end of the first anchor pole (anchor cable) 13 on the parallel channel-section steel in direction is arranged to thread segment and stretched out on the channel-section steel of cross U-steel frame 11
Plate face, the threaded connection section of the first anchor pole (anchor cable) 13 are arranged with the first pad 131, and overall first pad 131 is in column jecket
Shape and one end, which are cut, angle face, and the angle face of first pad 131 is fitted in the upper face of channel-section steel, the I-shaped U-steel frame
The threaded upper ends linkage section of second anchor pole (anchor cable) 23 in 21 two parallel channel-section steel centre positions is arranged with the second pad 231, institute
Stating overall cut in column jecket shape and one end of the second pad 231 has angle face, and the angle face of second pad 231 is fitted in channel-section steel
Upper face；
The structure type of first, second above-mentioned pad 131,231 so that first, second anchor pole (anchor being in tilted layout
Rope) 13,23 contact of the face with face is presented all the time with the connection of the channel-section steel 14,24 of channel-section steel first, second, so as to further eliminate stress
The situation of concentration；
Above-mentioned first, second anchor pole (anchor cable) 13,23 is each passed through in the bottom land plate face of first, second channel-section steel 14,24
The through hole of setting is all higher than the diameter of first, second anchor pole (anchor cable) 13,23, facilitates first, second anchor pole (anchor cable) 13,23
Through operation.
Above-mentioned anchor pole can also be anchor cable, be connected using the anchor hole on the ground of the bottom and sidepiece in anchor cable and tunnel,
Above-mentioned effect can be reached.
Further to improve support strong degree of the combining structure to bottom plate, the channel-section steel 24 of the first channel-section steel 14 and second it is outer
Buffer rubber gasket is respectively arranged with side channel wall；
Above-mentioned buffer rubber gasket can fully ensure that the flexibility of terrace allows pressure energy power.
Similarly, in practice of construction, the bottom in the tunnel is disposed with foam concrete bed course, described first, second
Frame 10,20 is sequentially fixed on foam concrete bed course；
Foam concrete bed course enables country rock effectively to discharge stress, and first, second support 10,20 causes the anti-of concrete
Pressure energy power is given full play to, and is mutually coordinated with surrouding rock deformation, is integrally burst apart caused by reducing stress concentration；Above-mentioned bubble
Foam concrete bed course enables tunnel Horizon to bear bigger active force, reduces country rock and integrally bursts apart, the foam coagulation at this
Soil padding can be understood as being arranged on the very overall buffering energy-absorbing cushion block of roadway floor, due to slow setting soil bottom of the prior art
Plate hardly possesses cushioning effect, causes roadway floor when there is stress concentration, it is easy to there is the phenomenon integrally burst apart, and
Foam concrete bed course exactly of the present utility model can fully spread, absorb the various stress concentrations that roadway floor is born and
Caused energy.
It following is a brief introduction of using the above-mentioned construction method for being used to administer the combining structure of floor lift in gallery, the construction
Method comprises the following steps：
A, bottom plate is equidistantly dug clearly on roadway floor and along tunnel length direction, make the shape of bottom plate curved；
B, two arc kerves are excavated along depth direction respectively between curved plate, vertically excavates a horizontal stroke
To kerve；
C, the one layer of 10cm-20cm of bottom plate and kerve upper berth excavated foam concrete and form foam concrete pad
Layer, support is sequentially arranged by first, second support 10,20；
D, the sidepiece position of first, second support 10,20 is flattened, forms one piece of smooth platform, and in platform
On be drilled with bolthole hole in advance；
E, a channel-section steel of prefabricated first support 10 is placed on the upper of bottom plate along tunnel bearing of trend, by the first anchor
Bar 13 passes through another channel-section steel parallel with span length direction, in above-mentioned reserved anchor pole hole and fixed；
F, being placed on two parallel channel-section steels of prefabricated second support 20 along tunnel bearing of trend in kerve, by second
Anchor pole 23 is in above-mentioned reserved anchor pole hole and fixed through two parallel channel-section steels middle parts of horizontal second support 20；
Described buffer rubber gasket is close to the first channel-section steel 14 and the second channel-section steel of first, second support 10,20 respectively G,
24 outer side slot wall cloths are put；
H, after-pouring concrete is all installed in place in whole combining structure, is completely covered by the concrete all structures,
Concrete exceeds original bottom plate position 10-20cm simultaneously.
In addition, in the step A, along tunnel length direction under to dig depth be 80-120cm, cloth of the bottom plate along tunnel
It is 4-8m to put spacing；
In the step B, arc kerve and horizontal kerve width are 40-60cm, and depth is respectively 80-120cm and 30-
40cm；
In the step C, the foam concrete for the one layer of 10-20cm thickness of bottom plate and kerve upper berth excavated；
In the step D, the reserved anchor pole hole of the heart in the soleplate is perpendicular to bottom plate, in the anchor that both sides are reserved
Rod aperture hole is to favour bottom plate normal 15-30 degree laterally；
In the step D, the berm width is 20-30cm；
In the step H, concrete exceeds original bottom plate position 10-20cm.
In above-mentioned construction method, first, second support 10,20 can be prefabricated in advance before tunnel is entered, and so may be used
The engineering time is greatly saved, improves efficiency of construction.
Combinations of the above structure is utilized in a word, and not only overall efficiency of construction is high, and administers the effect pole of floor lift in gallery
It is good, there is high promotional value.
It should be noted that above example is only to illustrate the technical solution of the utility model, it is rather than its limitations, most
The utility model is described in detail with reference to the foregoing embodiments for pipe, it will be understood by those within the art that：Its
The technical scheme described in foregoing embodiments can still be modified, or which part technical characteristic is equal
Replace, and these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technical side
The spirit and scope of case.
Claims (6)
1. the combining structure for administering floor lift in gallery, it is characterised in that：First, second support including being arranged on tunnel bottom
(10,20), the first support (10) include the cross U-steel frame (11) that two channel-section steel square crossings are formed, the cross U-steel frame
(11) both ends of two channel-section steels are arranged in a crossed manner respectively the first opening up arch channel-section steel (12), the first arch channel-section steel
(12) both ends and the channel-section steel both ends junction of cross U-steel frame (11) are respectively arranged with the first anchor pole (13) and are plugged on tunnel bottom
Portion, two channel-section steels of the cross U-steel frame (11) are parallel with the length direction and width in tunnel respectively；
The second support (20) includes I-shaped U-steel frame (21), two parallel channel-section steel both ends difference of the I-shaped U-steel frame (21)
It is provided with the second opening up arch channel-section steel (22), both ends and the I-shaped U-steel frame (21) of the second arch channel-section steel (22)
Two parallel channel-section steel both ends junction are respectively arranged with the second anchor pole (23) and are plugged on tunnel bottom, the I-shaped U-steel frame (21)
Two parallel channel-section steels are parallel with the length direction in tunnel；
First, second support (10,20) is alternately arranged along tunnel length direction and the cross channel-section steel of first support (10)
The region that frame (11) is stretched between two parallel channel-section steels of the I-shaped U-steel frame (21) of second support (20).
2. the combining structure according to claim 1 for being used to administer floor lift in gallery, it is characterised in that：The cross U-steel frame
(11) two channel-section steel both ends are respectively arranged with the first channel-section steel (14), the base surface level of first channel-section steel (14) and the first anchor pole
(13) upper end is separately fixed in base surface, and two parallel channel-section steel both ends of the I-shaped U-steel frame (21) are respectively arranged with second
Channel-section steel (24), the base surface of second channel-section steel (24) is horizontal and the upper end of the second anchor pole (23) is separately fixed in base surface.
3. the combining structure according to claim 2 for being used to administer floor lift in gallery, it is characterised in that：The cross U-steel frame
(11) first anchor pole (13) at the both ends of the channel-section steel parallel with span length direction tilts extension, second anchor pole laterally in
(23) two parallel channel-section steel middle positions arrangements of I-shaped U-steel frame (21) are also located at and the second anchor pole (23) of the opening position to
Outside tilts extension.
4. the combining structure according to claim 3 for being used to administer floor lift in gallery, it is characterised in that：The cross U-steel frame
(11) the first anchor pole (13) upper end on the channel-section steel parallel with span length direction is arranged to thread segment and stretches out cross channel-section steel
The channel-section steel upper face of frame (11), the threaded connection section of the first anchor pole (13) are arranged with the first pad (131), first pad
(131) overall to have angle face in column jecket shape and one end cutting, the angle face of first pad (131) is fitted in the upper plate of channel-section steel
Face, the threaded upper ends linkage section of second anchor pole (23) in two parallel channel-section steel centre positions of the I-shaped U-steel frame (21) are arranged with
Second pad (231), second pad (231) integrally have angle face, second pad in column jecket shape and one end cutting
(231) angle face is fitted in the upper face of channel-section steel.
5. the combining structure according to claim 4 for being used to administer floor lift in gallery, it is characterised in that：First channel-section steel
(14) and on the outside cell wall of the second channel-section steel (24) it is respectively arranged with buffer rubber gasket.
6. the combining structure according to claim 5 for being used to administer floor lift in gallery, it is characterised in that：The bottom in the tunnel
Foam concrete bed course is disposed with, first, second support (10,20) is sequentially fixed on foam concrete bed course.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720532350.1U CN206694041U (en) | 2017-05-15 | 2017-05-15 | For administering the combining structure of floor lift in gallery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720532350.1U CN206694041U (en) | 2017-05-15 | 2017-05-15 | For administering the combining structure of floor lift in gallery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206694041U true CN206694041U (en) | 2017-12-01 |
Family
ID=60450058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720532350.1U Expired - Fee Related CN206694041U (en) | 2017-05-15 | 2017-05-15 | For administering the combining structure of floor lift in gallery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206694041U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060809A (en) * | 2017-05-15 | 2017-08-18 | 安徽理工大学 | Combining structure and construction method for administering floor lift in gallery |
-
2017
- 2017-05-15 CN CN201720532350.1U patent/CN206694041U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060809A (en) * | 2017-05-15 | 2017-08-18 | 安徽理工大学 | Combining structure and construction method for administering floor lift in gallery |
| CN107060809B (en) * | 2017-05-15 | 2023-06-16 | 安徽理工大学 | Combined structure for treating floor heave of roadway and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102605792B (en) | Multi-row mini-pile enclosing structure for blocking soil and construction process | |
| CN103485801B (en) | For the roadway support device of workings subject to dy namic pressure and gob side entry retaining | |
| CN108487911A (en) | The compound crossing method construction method of longspan tunnel bilateral wall under complex geological condition | |
| CN105370299B (en) | The buried empty roadway protection processing in high seam thin coal pillar edge of km | |
| CN109826667A (en) | The I-shaped checkdam of coal mine underground reservoir | |
| CN109630195B (en) | Strong-wall seepage-blocking water retaining dam for coal mine underground reservoir | |
| CN103775084B (en) | High inclination-angle, mining height workface equipment cross geological structure crushed zone construction technology | |
| CN108661664A (en) | A kind of tunnel crushed zone construction method and combination supporting device | |
| CN204690573U (en) | The oblique trestle of a kind of portable earthwork transportation | |
| CN108798723A (en) | A kind of superelevation stope drift active workings method for protecting support of the coal containing jacking applied to high seam | |
| CN205778903U (en) | A kind of soft-rock tunnel pucking preventing and treating device | |
| CN107060809A (en) | Combining structure and construction method for administering floor lift in gallery | |
| CN206205903U (en) | A kind of base plate release ruggedized construction of control deep tunnel bottom distension | |
| CN206694041U (en) | For administering the combining structure of floor lift in gallery | |
| CN106014413A (en) | Method for implementing combined supporting on goaf-along driven roadway and adjacent roadway in thick coal layer | |
| CN103967018B (en) | Deep big foundation pit angle support level shear structure | |
| CN109630171B (en) | Method for controlling floor heave by arranging pressure relief lane along bottom plate along top lane | |
| CN104948207B (en) | For improving the device of swell-shrink characteristic soil property large cross-section tunnel steel arch-shelf load-carrying properties | |
| CN105736010A (en) | Supporting structure for extremely-narrow coal pillar roadway driving along goaf and construction method of supporting structure | |
| CN106930779A (en) | A kind of special-shaped canopy method for protecting support of micro- arch of high-dipping three soft coal layer re-exploration laneway battered leg | |
| CN216892449U (en) | Foundation pit supporting structure combining cast-in-place pile and jet grouting pile | |
| CN103982196B (en) | Bolting and shotcrete roadway two helps concrete spray coating shear failure prevention and controls | |
| CN210369070U (en) | Integral combined anti-floating structure of foundation pit in upper soft and lower hard stratum in karst area | |
| CN210086193U (en) | Rock-fill dam spillway based on concrete pile supports | |
| CN110617077B (en) | Construction method for preventing floor heave of tunnel bottom inverted arch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 Termination date: 20180515 |