CN109975047A - Tunnel drainage blind pipe blocking mechanism model test apparatus and its test method - Google Patents
Tunnel drainage blind pipe blocking mechanism model test apparatus and its test method Download PDFInfo
- Publication number
- CN109975047A CN109975047A CN201910204730.6A CN201910204730A CN109975047A CN 109975047 A CN109975047 A CN 109975047A CN 201910204730 A CN201910204730 A CN 201910204730A CN 109975047 A CN109975047 A CN 109975047A
- Authority
- CN
- China
- Prior art keywords
- blind pipe
- drainage
- chamber
- blocking mechanism
- tunnel
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
Abstract
The invention discloses tunnel drainage blind pipe blocking mechanism model test apparatus, including support frame, chamber, drainage system, header tank and variable frequency pump, the chamber and the drainage system are installed on support frame as described above；The chamber includes cabinet and arch sheet, and multiple water inlets are provided on the cabinet, and multiple discharge openings are provided on the arch sheet；The discharge structure includes circle draining blind pipe, gutter and longitudinal drainage blind pipe, and the every circle draining blind pipe includes N root curved pipe and N+1 tee tube A；The gutter is provided with twice；The every longitudinal drainage blind pipe include M tee tube B and M+1 root straight tube and they be arranged alternately.The present invention establishes Tunneling by mining method model for drainage system by circumferential and longitudinal drainage blind pipe and variable frequency pump etc., it realizes and draining blind pipe Crystallization Plugging problem is simulated in laboratory conditions, be conducive to the research for draining blind pipe blocking mechanism and its Correlative Influence Factors to Tunneling by mining method.
Description
Technical field
The invention belongs to underground engineering fields, more particularly, to tunnel drainage blind pipe blocking mechanism model test apparatus
And its test method.
Background technique
Currently, China's mountain tunnel mostly uses greatly composite lining as support form, and composite lining is usually by initial stage
Bolt-spary supports, waterproof and water drainage system and secondary lining composition.Wherein, waterproof and water drainage system mainly by longitudinal, circumferential blind pipe, geotextiles and
Splash guard, construction joint waterstop, draining light and shade ditch composition.In waterproofing design, tunnel water proofing depend on preliminary bracing with
Waterproof roll between secondary lining, and do not consider the waterproofness of preliminary bracing generally.
But underground water can penetrate preliminary bracing, and after being pooled to draining blind pipe, draining lateral sulcus then be introduced, when setting
It is introduced outside Central drain discharge tunnel by lateral sulcus again when being equipped with Central drain.Blind pipe is drained under the long term of underground water, warp
Chang Yinwei calcium salt crystalline deposit and block.Since current tunnel drainage system is not given sufficient attention, set in tunnel
Meter and construction period will generate a series of engineerings after not having corresponding solution, draining blind pipe to block this problem
Problem, such as the problems such as Lining cracks, large area percolating water and reinforcement corrosion.These engineering diseases not only threaten traffic safety,
And major hidden danger is brought safely to tunnel structure, increase the cost and difficulty of tunnel operation maintenance.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides tunnel drainage blind pipe blocking mechanism models
Experimental rig and its test method, it is in fact existing that draining blind pipe Crystallization Plugging problem is simulated in laboratory conditions.With it is existing
Field test is compared, which had not only shortened the test period but also reduced empirical risk.
To achieve the above object, according to one aspect of the present invention, the examination of tunnel drainage blind pipe blocking mechanism model is provided
Experiment device, which is characterized in that including support frame, chamber, drainage system, header tank and variable frequency pump, wherein
The chamber and the drainage system are installed on support frame as described above；
For loading country rock material inside the chamber, the chamber include cabinet and with the consistent arch of tunnel-shaped
Plate, and the lower part of the cabinet has sunk structure, and the arch sheet is arranged at the sunk structure, is provided on the cabinet
Multiple water inlets are provided with multiple discharge openings on the arch sheet；
The drainage system is located in the enclosed region of the arch sheet, which includes circle draining blind pipe, draining
Gutter and longitudinal drainage blind pipe, also,
The circle draining blind pipe is provided with M root and they are equally spaced along the longitudinal direction of the arch sheet, every institute
Stating circle draining blind pipe includes N root curved pipe and N+1 tee tube A and their alternately connection settings, adjacent two arcs
The I mouthful and II mouthful connection that pipe passes through a tee tube A；
The gutter is provided with twice, longitudinal direction of the laying direction of gutter described in per pass with the arch sheet
Unanimously, and in per pass gutter a longitudinal drainage blind pipe, the longitudinal drainage blind pipe in the gutter is respectively set
Length direction it is consistent with the laying direction of the gutter；
The every longitudinal drainage blind pipe includes M tee tube B and M+1 root straight tube, and their alternately connection settings,
The I mouthful and II mouthful connection that adjacent two straight tubes pass through a tee tube B；
The every circle draining blind pipe head end and the curved pipe of end are inserted into a tee tube B's of respective side respectively
III mouthful, so that the circle draining blind pipe be made to be connected to the longitudinal drainage blind pipe；
III mouthful of each tee tube A is connect by a tapping pipe with the discharge opening respectively, and described in every
Emptying valve is separately installed on tapping pipe；
The header tank is used to recycle the underground water of tunnel drainage structure discharge, the setting frequency conversion water in the header tank
Pump, the variable frequency pump is connect by inlet pipeline with all water inlets, and is provided with inlet valve on the inlet pipeline.
Preferably, stainless steel plate is made in the chamber.
Preferably, these water inlets on the cabinet are arranged around the cabinet, come from each side with simulated groundwater
To the case where.
Preferably, these inlet openings setting is distributed on different horizontal planes, ipsilateral same level on the cabinet
On inlet opening spacing it is equal.
Preferably, the drain hole is provided with multiple rows of, drain hole described in every row along the longitudinally disposed of the arch sheet, and
And the drain hole of every row is equally spaced.
Preferably, the angle of plane is equal where the center line of adjacent two rows of drain holes.
Other side according to the invention is additionally provided and is filled using the tunnel drainage blind pipe blocking mechanism model test
The test method set, which comprises the following steps:
1) country rock material is loaded in chamber: the soil body layering of country rock material being filled into chamber, and according to every
Height buries corresponding sensor where layer soil body；
2) underground water that tunnel drainage structure is discharged is attached in header tank；
3) it is saturated the soil body: opening all inlet valve and emptying valve, open to become to pump to pump and adjust variable frequency pump and raise
Journey, wait have underground water from drainage system outflow after, close emptying valve, to allow the soil body to reach saturation；
4) emptying valve is opened, after seepage stability, sensor is measured；
5) underground water is allowed to recycle the time of setting, generation of the measurement crystallization in drainage system in header tank and chamber
Situation；
6) variable frequency pump is closed, after underground water is from drainage system discharge, the drainage system that more renews；
7) step 1)~step 6) is repeated, by this method, constantly obtains production of the crystallization in drainage system.
Preferably, every layer soil body is tamped.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
(1) a kind of tunnel drainage blind pipe blocking mechanism model test apparatus provided by the invention, including chamber, header tank
With three parts of drainage system, Tunneling by mining method draining system is established by circumferential and longitudinal drainage pipe and hydraulic pressure adjustment equipment etc.
System model is realized and is simulated in laboratory conditions to draining blind pipe Crystallization Plugging problem, is conducive to arrange Tunneling by mining method
The research of water blind pipe blocking mechanism and its Correlative Influence Factors, the tunnel drainage to solve the problems, such as generally existing provide foundation, with
Tunnel drainage system is optimized convenient for preferably perfect.
(2) a kind of tunnel drainage blind pipe blocking mechanism model test apparatus provided by the invention, hydraulic pressure is by header tank
Variable frequency pump provides, and compared with tradition provides the experimental rig of hydraulic pressure by certain altitude water tank, this pilot system provides higher
While head, the range that can provide head is also increased.
(3) a kind of tunnel drainage blind pipe blocking mechanism model test apparatus provided by the invention is arranged in chamber surrounding
22 water inlets provide the water inlet source of different number by pipe branch, can come from different directions with simulated groundwater source
Various situations.
(4) a kind of tunnel drainage blind pipe blocking mechanism model test apparatus provided by the invention, drainage system by inserting fastly
Connector threeway connection can simulate a variety of draining blind pipe types and drainage system form convenient for draining the replacement and disassembly of blind pipe.
(5) a kind of tunnel drainage blind pipe blocking mechanism model test apparatus provided by the invention, underground water pass through tunnel two
The gutter of side flows back into header tank, realizes recycling for test water, and water conservation while simplifies operation.
(6) test method of a kind of tunnel drainage blind pipe blocking mechanism model test apparatus provided by the invention, by setting
It sets water flow to enter the soil body of layering and be discharged from drainage system, carrys out simulated groundwater seepage flow to country rock and the ring longitudinal direction blind pipe in tunnel
And be discharged, the influence factor of tunnel drainage blind pipe blocking is analyzed by the crystallised component for including in water flow, can comprehensively be studied
Tunnel drainage blind pipe blocking mechanism.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the schematic internal view of chamber in the present invention；
Fig. 3 is the structural schematic diagram of setting variable frequency pump in header tank in the present invention；
Fig. 4 is the structural schematic diagram of drainage system in the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
As shown in Figure 1 to 4, tunnel drainage blind pipe blocking mechanism model test apparatus, including support frame 11, chamber
11, drainage system 16, header tank 5 and variable frequency pump 6, wherein
The chamber 11 and the drainage system 16 are installed on support frame as described above 11；
For loading country rock material inside the chamber 11, which includes cabinet 12 and consistent with tunnel-shaped
Arch sheet 3, and the lower part of the cabinet 12 has sunk structure, and the arch sheet 3 is arranged at the sunk structure, the case
It is provided with multiple water inlets on body 12, is provided with multiple discharge openings on the arch sheet 3；Preferably, stainless in the chamber 11
Steel plate is made, and the cabinet 12 is wholy set on support frame 11, and the side of front, rear, left and right four of the cabinet 12 is by stainless
Steel plate links into an integrated entity and integrally in rectangle, the position close to 12 top of cabinet use using strip steel pipe around it into
Row reinforces consolidation, and two blocks of opposite steel plates in rectangle width direction, the bottom middle position of every block of steel plate is arch notch,
The arc-shaped edges of arch notch are connected by the arch sheet 3, and 3 bottom of arch sheet is connect with the stainless steel plate bottom of cabinet 12
Closing, foring centre has the bottom arched upward, and 12 top of cabinet is individually shelved with cover board, and cover board can be removed.Preferably, institute
The case where these water inlets on cabinet 12 are arranged around the cabinet 12, come from all directions with simulated groundwater is stated, these
Inlet opening setting is distributed on different horizontal planes, the spacing phase of the inlet opening on the cabinet 12 in ipsilateral same level
Deng.It is evenly arranged the drain hole 4 in addition, being circumferentially provided on the arc plate at interval of certain distance, the drain hole 4
It is provided with multiple rows of, drain hole 4 described in every row is along the longitudinally disposed of the arch sheet 3, and between described drain hole 4 of every row etc.
Away from arrangement, it is adjacent two rows drain holes 4 center line where plane angle it is equal, for example, can with horizontal plane at 30 °,
An excretion water hole 4 is respectively set at 60 °, 90 °, 120 ° and 150 ° of five sections.
The drainage system 16 is located in the enclosed region of the arch sheet 3, the discharge structure include circle draining blind pipe 7,
Gutter 10 and longitudinal drainage blind pipe 8, also,
The circle draining blind pipe 7 is provided with M root and they are equally spaced along the longitudinal direction of the arch sheet 3, and every
The circle draining blind pipe 7 includes N root curved pipe 13 and N+1 tee tube A9 and their alternating connections are arranged, and adjacent two
The I mouthful and II mouthful connection that curved pipe 13 described in root passes through a tee tube A9；Preferably, M >=2, N >=2.
The gutter 10 is provided with twice, the laying direction of gutter 10 described in per pass with the arch sheet 3
Vertical consistency, and the longitudinal drainage blind pipe 8, the gutter are respectively set in gutter 10 described in per pass
The length direction of longitudinal drainage blind pipe 8 in 10 and the laying direction of the gutter 10 are consistent；
The every longitudinal drainage blind pipe 8 includes M tee tube B14 and M+1 root straight tube 15, and they are alternately connected
Setting, the I mouthful and II mouthful connection that adjacent two straight tubes 15 pass through a tee tube B14；
Every 7 head end of circle draining blind pipe and the curved pipe 13 of end are inserted into a tee tube of respective side respectively
III mouthful of B14, so that the circle draining blind pipe 7 be made to be connected to the longitudinal drainage blind pipe 8；
III mouthful of each tee tube A9 is connect by a tapping pipe with the discharge opening respectively, and described in every
Emptying valve is separately installed on tapping pipe, to control draining node.；
The header tank 5 is used to recycle the underground water of tunnel drainage structure discharge, the setting frequency conversion water in the header tank 5
Pump 6, the variable frequency pump 6 is connect by inlet pipeline with all water inlets, and is provided with inlet valve on the inlet pipeline
Door, inlet pipeline can have a water main and Duo Gen distributive pipe, be divided between water main and distributive pipe by water segregator
Underground water can be sent to water inlet by distributive pipe in this way by water, and the water main in inlet pipeline can be set in inlet valve
On, inlet valve can also be all set on every distributive pipe of inlet pipeline；Header tank 5 is close to chamber 11 and is located at described
12 lower part of cabinet, 5 cabinet 12 of header tank are that the cuboid of top uncovered, surrounding and bottom are connected using stainless-steel sheet,
Water source is provided for recycling the underground water of tunnel drainage structure discharge, while for chamber 11；The variable frequency pump 6 is installed on institute
State the bottom of 5 cabinet 12 of header tank, and it is mating be provided with water inlet pipe, the water inlet for passing through water inlet pipe and chamber 11 connects
It is logical, for the water in 5 cabinet 12 of header tank to be pumped into chamber 11 by the water inlet.
Underground water in chamber 11 is flowed into the circle draining blind pipe 7 by the drain hole 4, then by the circumferential direction
Draining blind pipe 7 flows into the longitudinal drainage blind pipe 8, finally imports the gutter 10 by the longitudinal drainage blind pipe 8 again
In.
Other side according to the invention is additionally provided and is filled using the tunnel drainage blind pipe blocking mechanism model test
The method for setting detection crystallization, which comprises the following steps:
1) country rock material is loaded in chamber 11: the soil body layering of country rock material being filled into chamber 11, every layer
The soil body is tamped, and buries corresponding sensor according to height where every layer soil body；
2) underground water that tunnel drainage structure is discharged is attached in header tank 5；
3) it is saturated the soil body: opening all inlet valve and emptying valve, open to become to pump to pump and adjust variable frequency pump 6 and raise
Journey, wait have underground water from drainage system 16 outflow after, close emptying valve, to allow the soil body to reach saturation；
4) emptying valve is opened, after seepage stability, sensor is measured；
5) underground water is allowed to recycle the time of setting in header tank 5 and chamber 11, for example week age, measurement crystallization exists
Production in drainage system 16；
6) variable frequency pump 6 is closed, after underground water is from the discharge of drainage system 16, the drainage system 16 that more renews；
7) step 1)~step 6) is repeated, by this method, constantly obtains production of the crystallization in drainage system 16.
The present invention carries out analog study to draining blind pipe blocking mechanism, simulates longitudinal direction, circle draining blind pipe 7 simultaneously, closely
It is seemingly consistent with the practical drainage condition of mountain tunnel, and guarantee that the water pressure of setting is constant, hydraulic pressure is controlled using variable frequency pump 6,
It realizes and draining blind pipe Crystallization Plugging problem is simulated in laboratory conditions, be conducive to stifled to Tunneling by mining method draining blind pipe
Fill in the research of mechanism and its Correlative Influence Factors.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (8)
1. tunnel drainage blind pipe blocking mechanism model test apparatus, which is characterized in that including support frame, chamber, drainage system,
Header tank and variable frequency pump, wherein
The chamber and the drainage system are installed on support frame as described above；
For loading country rock material inside the chamber, the chamber include cabinet and with the consistent arch sheet of tunnel-shaped,
And the lower part of the cabinet has sunk structure, and the arch sheet is arranged at the sunk structure, is provided on the cabinet more
A water inlet is provided with multiple discharge openings on the arch sheet；
The drainage system is located in the enclosed region of the arch sheet, which includes circle draining blind pipe, gutter
With longitudinal drainage blind pipe, also,
The circle draining blind pipe is provided with M root and they are equally spaced along the longitudinal direction of the arch sheet, the every ring
To draining blind pipe include N root curved pipe and N+1 tee tube A and their alternately connection settings, adjacent two curved pipes are logical
Cross the I mouthful and II mouthful connection of a tee tube A；
The gutter is provided with twice, the laying direction of gutter described in per pass with the arch sheet longitudinal one
It causes, and a longitudinal drainage blind pipe is respectively set in per pass gutter, the longitudinal drainage blind pipe in the gutter
Length direction is consistent with the laying direction of the gutter；
The every longitudinal drainage blind pipe includes M tee tube B and M+1 root straight tube, and their alternately connection settings, adjacent
The I mouthful and II mouthful connection that two straight tubes pass through a tee tube B；
The every circle draining blind pipe head end and the curved pipe of end are inserted into the III of a tee tube B of respective side respectively
Mouthful, so that the circle draining blind pipe be made to be connected to the longitudinal drainage blind pipe；
III mouthful of each tee tube A is connect by a tapping pipe with the discharge opening respectively, and the every sluicing
Emptying valve is separately installed on pipe；
The header tank is used to recycle the underground water of tunnel drainage structure discharge, the setting variable frequency pump, institute in the header tank
It states variable frequency pump to connect by inlet pipeline with all water inlets, and is provided with inlet valve on the inlet pipeline.
2. tunnel drainage blind pipe blocking mechanism model test apparatus according to claim 1, which is characterized in that the test
Stainless steel plate is made in case.
3. tunnel drainage blind pipe blocking mechanism model test apparatus according to claim 1, which is characterized in that the cabinet
On these water inlets around the cabinet be arranged, with simulated groundwater come from all directions the case where.
4. tunnel drainage blind pipe blocking mechanism model test apparatus according to claim 3, which is characterized in that these water inlets
Hole setting is distributed on different horizontal planes, and the spacing of the inlet opening on the cabinet in ipsilateral same level is equal.
5. tunnel drainage blind pipe blocking mechanism model test apparatus according to claim 1, which is characterized in that the sluicing
Hole is provided with multiple rows of, and drain hole described in every row is along the longitudinally disposed of the arch sheet, and between described drain hole of every row etc.
Away from arrangement.
6. tunnel drainage blind pipe blocking mechanism model test apparatus according to claim 5, which is characterized in that adjacent two rows
The angle of plane is equal where the center line of drain hole.
7. using the examination of tunnel drainage blind pipe blocking mechanism model test apparatus described in any claim in claim 1~6
Proved recipe method, which comprises the following steps:
1) country rock material is loaded in chamber: the soil body layering of country rock material being filled into chamber, and according to every layer of soil
Height buries corresponding sensor where body；
2) underground water that tunnel drainage structure is discharged is attached in header tank；
3) it is saturated the soil body: opening all inlet valve and emptying valve, open and become water pumping pump and adjust variable frequency pump lift, to
There is underground water after drainage system outflow, emptying valve is closed, to allow the soil body to reach saturation；
4) emptying valve is opened, after seepage stability, sensor is measured；
5) underground water is allowed to recycle the time of setting, generation feelings of the measurement crystallization in drainage system in header tank and chamber
Condition；
6) variable frequency pump is closed, after underground water is from drainage system discharge, the drainage system that more renews；
7) step 1)~step 6) is repeated, by this method, constantly obtains production of the crystallization in drainage system.
8. the method according to the description of claim 7 is characterized in that every layer soil body is tamped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910204730.6A CN109975047A (en) | 2019-03-18 | 2019-03-18 | Tunnel drainage blind pipe blocking mechanism model test apparatus and its test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910204730.6A CN109975047A (en) | 2019-03-18 | 2019-03-18 | Tunnel drainage blind pipe blocking mechanism model test apparatus and its test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109975047A true CN109975047A (en) | 2019-07-05 |
Family
ID=67079349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910204730.6A Pending CN109975047A (en) | 2019-03-18 | 2019-03-18 | Tunnel drainage blind pipe blocking mechanism model test apparatus and its test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109975047A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103225A (en) * | 2020-01-23 | 2020-05-05 | 中铁第四勘察设计院集团有限公司 | Tunnel geotextile physical clogging measuring device and method |
| CN111257191A (en) * | 2020-01-23 | 2020-06-09 | 中铁第四勘察设计院集团有限公司 | Chemical clogging measurement method for geotextile |
| CN112504935A (en) * | 2020-11-25 | 2021-03-16 | 青岛理工大学 | Tunnel seepage test device |
| CN114892586A (en) * | 2022-04-12 | 2022-08-12 | 交通运输部上海打捞局 | Model test device for non-contact pipe curtain method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387435A (en) * | 2018-10-19 | 2019-02-26 | 北京工业大学 | A kind of tunnel distribution of water pressure rule model test apparatus |
-
2019
- 2019-03-18 CN CN201910204730.6A patent/CN109975047A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387435A (en) * | 2018-10-19 | 2019-02-26 | 北京工业大学 | A kind of tunnel distribution of water pressure rule model test apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103225A (en) * | 2020-01-23 | 2020-05-05 | 中铁第四勘察设计院集团有限公司 | Tunnel geotextile physical clogging measuring device and method |
| CN111257191A (en) * | 2020-01-23 | 2020-06-09 | 中铁第四勘察设计院集团有限公司 | Chemical clogging measurement method for geotextile |
| CN112504935A (en) * | 2020-11-25 | 2021-03-16 | 青岛理工大学 | Tunnel seepage test device |
| CN114892586A (en) * | 2022-04-12 | 2022-08-12 | 交通运输部上海打捞局 | Model test device for non-contact pipe curtain method |
| CN114892586B (en) * | 2022-04-12 | 2023-10-10 | 交通运输部上海打捞局 | Model test device for non-contact pipe curtain method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109975047A (en) | Tunnel drainage blind pipe blocking mechanism model test apparatus and its test method | |
| CN104863614B (en) | Method for primary support with corrugated steel plate and concrete combined structure taking place of steel grating | |
| CN110566273B (en) | Drainage system and drainage method for treating tunnel surrounding rock fracture water | |
| CN109853454B (en) | Siphon type estuary underground reservoir water changing device and operation method | |
| CN208294567U (en) | A kind of fixation device for the soft mould pocket type mold pouring walling suitable for underground | |
| CN105570533A (en) | Continuous laying and water-saving pressure testing construction method of long-distance water pipe | |
| CN111411934A (en) | Horizontal well sand-water cooperative output and control and exploitation well completion multifunctional experimental system and experimental method thereof | |
| CN105909259B (en) | Existing shield tunnel pipe curtain construction settlement control system and method are closely worn down | |
| CN105225593B (en) | For simulating the culvert system of groundwater environment in ground stratum | |
| CN106847048B (en) | Simulate the emulation Boundary Test system of artesian groundwater recharge | |
| CN206844275U (en) | Mutual buckle type precast concrete cover ditch and its suspender | |
| CN108343035A (en) | River construction method is worn under shallow tunnel | |
| CN109827958B (en) | Karst area tunnel drainage system crystallization blocking simulation test device and test method | |
| CN110438996A (en) | One kind pouring mass concrete cooling device | |
| CN104652383B (en) | Tailings warehouse dam body free-draining device | |
| CN112017522A (en) | Tailing pond ecological restoration and soil erosion simulation experiment device | |
| CN204152530U (en) | Water burst tunnel tunnel face seepproof screen | |
| CN113266373A (en) | Freezing wall and cement reinforcement combined enclosure system in large-section tunnel construction and excavation method thereof | |
| CN206143745U (en) | Long tahu power station irrigation equipment that retains water | |
| CN106801414A (en) | Dyke and dyke construction method of a kind of band from discharge structure | |
| CN105696611A (en) | Foundation pit dewatering device for sand layer with high water permeability | |
| CN106718237A (en) | A kind of tree root underground observation structure and method of construction and application method | |
| CN209979252U (en) | Tunnel drainage blind pipe blocking mechanism model test device | |
| CN107701231B (en) | Underground sump system with intensive integral structure and construction method thereof | |
| CN103374904B (en) | Farmland discharging-irrigating patten transformation saves land water-saving method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |