CN206800441U - A kind of channel excavation breast boards - Google Patents

A kind of channel excavation breast boards Download PDF

Info

Publication number
CN206800441U
CN206800441U CN201720597139.8U CN201720597139U CN206800441U CN 206800441 U CN206800441 U CN 206800441U CN 201720597139 U CN201720597139 U CN 201720597139U CN 206800441 U CN206800441 U CN 206800441U
Authority
CN
China
Prior art keywords
baffle plate
riser
breast boards
soil body
base
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.)
Active
Application number
CN201720597139.8U
Other languages
Chinese (zh)
Inventor
边瑞明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Zhongxing Heng Engineering Consulting Co Ltd
Original Assignee
Beijing Zhongxing Heng Engineering Consulting Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Zhongxing Heng Engineering Consulting Co Ltd filed Critical Beijing Zhongxing Heng Engineering Consulting Co Ltd
Priority to CN201720597139.8U priority Critical patent/CN206800441U/en
Application granted granted Critical
Publication of CN206800441U publication Critical patent/CN206800441U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a kind of channel excavation breast boards, including riser, cross-brace, riser side is vertically provided with multiple baffle plates being mutually slidably connected, riser, baffle plate side are vertically provided with slide rail, baffle plate is provided with chute towards slide rail side, chute bottom wall offers slideway along its length, and slideway top is provided with limiting stand, and slide rail bottom is provided with the projection for being embedded in slideway;Base is provided with immediately below baffle plate, base inserts the soil body towards one end of the soil body, the groove for baffle plate insertion is offered on base;Multiple drainpipes are equipped with the baffle plate of lowermost end, multiple drainpipes are set diagonally downward from soil body side towards base.When carrying out grooving work, reduce the process of backfill, improve efficiency of construction;Because breast boards installing/dismounting is convenient, reduce the setting time of pouring type retaining wall, improve efficiency of construction;By setting snap close piece, the relative slip of riser, baffle plate is limited, improves the stability of breast boards.

Description

A kind of channel excavation breast boards
Technical field
It the utility model is related to construction engineering technical field, more particularly to a kind of channel excavation breast boards.
Background technology
In building duct work, hydraulic engineering and coast defence engineering, to be advantageous to running smooth for engineering, it is often necessary to structure The effect of resistance horizontal loading and waterproof can be played by building thing;That is commonly used in engineering has cast-in-place diaphram wall, cast-in-place drill-pouring Stake, armored concrete Gravity Retaining Wall etc..As temporary structure, that is commonly used in architectural engineering has gravity dam, steel sheet pile, earth-retaining Plate etc..
Existing cast-type retaining wall is in construction, it is necessary to the groove that width is more than design width first be excavated out, in groove Both sides cast retaining wall, have certain space between retaining wall and soil body side wall, after the retaining wall solidification of cast, it is also necessary to Retaining wall and backfill in the space of soil body side wall, construction is complicated, reduces efficiency of construction.
The content of the invention
The purpose of this utility model is to provide a kind of channel excavation breast boards, and it has the advantages of construction is simple, efficiency high.
Above-mentioned technical purpose of the present utility model technical scheme is that:
A kind of channel excavation breast boards, including the riser positioned at groove both sides, in working condition, two pieces of risers it Between be provided with cross-brace, the cross-brace is located at the riser top, the riser away from soil body side vertically Multiple baffle plates being mutually slidably connected are provided with, the riser, baffle plate are vertically provided with slide rail away from soil body side, institute State baffle plate and the slide rail side is provided with chute, the chute bottom wall offers slideway, the slideway along its length Top is provided with limiting stand, and the slide rail bottom is provided with the projection for being embedded in the slideway;The riser top is towards the soil body Side is horizontal-extending transverse slat;Base is provided with immediately below the baffle plate, the base inserts the soil body towards one end of the soil body, The groove for baffle plate insertion is offered on the base;Multiple drainpipes are equipped with the baffle plate of lowermost end, it is multiple The drainpipe is set diagonally downward from soil body side towards the base.
By using above-mentioned technical proposal, when carrying out grooving work, when certain depth is arrived in digging, riser is placed on groove Two side, transverse slat is ridden over the soil body upper surface of groove both sides, riser is close to the side wall of groove, with laterally branch between two risers Support is reinforced;Grooving is then proceeded by, when certain depth is arrived in digging, baffle plate is stopped along slide rail slide downward to the soil body, directly To digging to the depth needed, base is inserted in the soil body, the baffle plate of lowermost end is inserted in groove, so as to complete the peace of breast boards Dress.
When carrying out grooving work, it is not necessary to certain space is reserved between breast boards and soil body side wall, so as to reduce The process of backfill, improve efficiency of construction;Because breast boards installing/dismounting is convenient, when reducing the solidification of pouring type retaining wall Between, improve efficiency of construction;It is slidably connected between polylith baffle plate and riser, so as to realize side grooving side bumper soil, reduces soil and cave in Possibility, improve job security;On the one hand base reduces the water in the foundation soil for penetrating into base bottom, on the other hand, soil The gravity that body applies to bottom plate causes riser to be not easy to topple, and improves the stability of riser;Due to the setting of base, baffle bottom is not Need to set cross-brace, increase the construction space of groove;Position-limiting action is played in limiting stand and the raised slip to baffle plate, subtracts Few baffle plate departs from the possibility of slide rail, improves job security.
The utility model is further arranged to:The thickness of the riser, multiple baffle plates along the base width direction Increase successively.
It is smaller to the pressure of riser because underground water content is relatively low in the shallow-layer soil body by using above-mentioned technical proposal, with The increase of gash depth, the underground water content in deep soil is high, and riser is not only by the pressure of the soil body, also by underground water Hydrostatic pressure;The thickness of baffle plate gradually increases, and enhances the pressure tolerance of baffle plate, improves the stability of breast boards.
The utility model is further arranged to:Drainage trough, the drainage trough are provided with the base along its length Positioned at the underface of the drainpipe outlet.
By using above-mentioned technical proposal, drainpipe drains into the underground water in the soil body in drainage trough, and underground water, which flows into, to be drawn Groove is discharged by water pump after chute, the hydrostatic pressure that riser is subject on the one hand is reduced, avoids underground water from accumulating in the bottom of groove Portion, avoid in the foundation soil below Groundwater infiltration base, improve the stability of breast boards.
The utility model is further arranged to:Snap close piece is provided between the riser and baffle plate, adjacent two pieces of baffle plates, The snap close piece is used to limit the slip between the riser, baffle plate.
By using above-mentioned technical proposal, during work, pass through the relative slip that snap close piece limits riser, baffle plate, improve and keep off The stability of native plate;At the end of construction, when riser is packed up, the slip of baffle plate is limited by snap close piece, facilitates tearing open for breast boards Unload and transport.
The utility model is further arranged to:The riser, the side wall bottom of baffle plate offer holding tank, the snap close piece Including the L-type dead bolt being rotatablely connected with the holding tank, the dead bolt is rotated in the horizontal plane, and the both ends of the baffle sidewall are set Be equipped with for the dead bolt insertion step trough, when the dead bolt is located in the step trough, the lateral wall of the dead bolt with it is described The side wall of riser is in the same plane.
By using above-mentioned technical proposal, during work, when the gash depth of excavation is more than the height of riser, pass through rotation Dead bolt releases dead bolt to the spacing of baffle plate, makes baffle plate along slide rail slide downward away from the step trough of baffle sidewall bottom, right The soil body is stopped;When the limiting stand and projection contacts of baffle plate, rotating lock tongue inserts it into the step trough on baffle sidewall top It is interior, avoid that the relative stability slided, improve breast boards occurs between baffle plate and riser;The lateral wall of dead bolt and the side wall of riser In the same plane, so that polylith breast boards in splicing in use, very close to each other between adjacent breast boards, improve breast boards The blocking effect to the soil body.
The utility model is further arranged to:The dead bolt and the jointed shaft of the holding tank hinged place are circumferentially provided with torsion Spring, the torsion spring are used to the dead bolt being pressed in the step trough.
By using above-mentioned technical proposal, torsion spring makes dead bolt remain inserted in step trough in the presence of elasticity, avoids Dead bolt departs from step trough in work progress, improves the stability and security of breast boards.
The utility model is further arranged to:The riser, baffle plate side wall on be provided with least three step troughs.
By using above-mentioned technical proposal, by changing the position relationship of dead bolt and step trough, change the height of breast boards, So as to adapt to the work of the earth-retaining of the groove of different depth.
Compared with prior art, the beneficial effects of the utility model are as follows:
(1)When carrying out grooving work, it is not necessary to certain space is reserved between breast boards and soil body side wall, so as to subtract Lack the process of backfill, improve efficiency of construction;
(2)Because breast boards installing/dismounting is convenient, reduce the setting time of pouring type retaining wall, improve efficiency of construction;
(3)By setting snap close piece, the relative slip of riser, baffle plate is limited, improves the stability of breast boards;
(4)By setting base and drainage trough, the water in the foundation soil for penetrating into base bottom, the opposing party are on the one hand reduced Face, the gravity that the soil body applies to bottom plate cause riser to be not easy to topple, and improve the stability of riser, and baffle bottom need not be set Cross-brace is put, increases the construction space of groove.
Brief description of the drawings
Side view when Fig. 1 is utility model works;
Fig. 2 is structural representation when the utility model deploys;
Fig. 3 is baffle arrangement schematic diagram of the present utility model;
Fig. 4 is baffle plate upward view of the present utility model;
Fig. 5 is A-A faces sectional view in Fig. 1;
Fig. 6 is B portions enlarged drawing in Fig. 5;
Structural representation when Fig. 7 packs up for the utility model.
Accompanying drawing mark:1st, riser;2nd, cross-brace;3rd, transverse slat;4th, baffle plate;5th, slide rail;6th, chute;7th, slideway;8th, it is spacing Platform;9th, it is raised;10th, base;11st, groove;12nd, drainpipe;13rd, drainage trough;14th, holding tank;15th, jointed shaft;16th, dead bolt;17、 Step trough;18th, torsion spring.
Embodiment
With reference to embodiment and accompanying drawing, the utility model is described in further detail, but implementation of the present utility model Mode is not limited only to this.
As depicted in figs. 1 and 2, a kind of channel excavation breast boards, including the riser 1 positioned at groove both sides, in working condition When, it is provided with cross-brace 2 between two pieces of risers 1, cross-brace 2 is located at the top of riser 1, and the top of riser 1 is towards soil body side Horizontal-extending to have transverse slat 3, transverse slat 3 is bolted with riser 1.
As shown in Figure 3 and Figure 4, riser 1 is vertically provided with two pieces of gears being mutually slidably connected away from soil body side Plate 4, riser 1, baffle plate 4 are vertically provided with slide rail 5 away from soil body side, and baffle plate 4 is provided with chute towards the side of slide rail 5 6。
In order to improve job security, the bottom wall of chute 6 offers slideway 7 along its length, and the top of slideway 7 sets limited Position platform 8, the bottom of slide rail 5 is provided with the projection 9 for being embedded in slideway 7.Spacing work is played in the slip of limiting stand 8 and raised 9 pairs of baffle plates 4 With reduction baffle plate 4 departs from the possibility of slide rail 5.
As depicted in figs. 1 and 2, in order to improve the stability of riser 1, the underface of baffle plate 4 is provided with base 10, base 10 The soil body is inserted towards one end of the soil body, the groove 11 inserted for baffle plate 4 is offered on base 10.First-class of the baffle plate 4 of lowermost end Away from three drainpipes 12 are equipped with, three drainpipes 12 are set diagonally downward from soil body side towards base 10.Edge on base 10 Its length direction is provided with drainage trough 13, and drainage trough 13 is located at the underface of the outlet of drainpipe 12.
On the one hand base 10 reduces the water in the foundation soil for penetrating into the bottom of base 10, on the other hand, the soil body applies to bottom plate Gravity cause riser 1 to be not easy to topple;Due to the setting of base 10, the bottom of baffle plate 4 need not set cross-brace 2, increase The construction space of groove.Drainpipe 12 drains into the underground water in the soil body in drainage trough 13, and underground water leads to after flowing into drainage trough 13 Water pump discharge groove is crossed, the hydrostatic pressure that riser 1 is subject on the one hand is reduced, avoids the foundation soil of the lower section of Groundwater infiltration base 10 In, improve the stability of breast boards.
It is smaller to the pressure of riser 1 because underground water content is relatively low in the shallow-layer soil body, it is deep with the increase of gash depth Underground water content in layer soil body is high, and riser 1 is not only by the pressure of the soil body, also by the hydrostatic pressure of underground water.Therefore, stand Thickness of 1, the two piece of baffle plate 4 of plate along the width of base 10 increases successively, enhances the pressure tolerance of baffle plate 4, improves gear The stability of native plate.
As shown in Figure 5 and Figure 6, due to being slidably connected between riser 1, baffle plate 4, in order to improve the stability of breast boards. Snap close piece is provided between riser 1 and baffle plate 4, adjacent two pieces of baffle plates 4, snap close piece is used to limit between riser 1, baffle plate 4 Slide.Riser 1, the side wall bottom of baffle plate 4 offer holding tank 14, and snap close piece includes rotating by jointed shaft 15 with holding tank 14 The L-type dead bolt 16 of connection, dead bolt 16 rotate in the horizontal plane, and the side wall of baffle plate 4 is provided at both ends with the ladder inserted for dead bolt 16 Groove 17.
During work, when the gash depth of excavation is more than the height of riser 1, by rotating lock tongue 16 away from baffle plate 4 The step trough 17 of side wall bottom, dead bolt 16 is released to the spacing of baffle plate 4, baffle plate 4 is carried out along the slide downward of slide rail 5 to the soil body Stop;When the limiting stand 8 of baffle plate 4 contacts with projection 9, rotating lock tongue 16 inserts it into the step trough 17 on the side wall top of baffle plate 4 It is interior, avoid that the relative stability slided, improve breast boards occurs between baffle plate 4 and riser 1.At the end of construction, riser 1 is packed up When, the slip of baffle plate 4 is limited by snap close piece, facilitates the dismounting and transport of breast boards.
In order to improve the blocking effect to the soil body of breast boards, when dead bolt 16 is located in step trough 17, the outside of dead bolt 16 The side wall of wall and riser 1 is in the same plane.The lateral wall of dead bolt 16 and the side wall of riser 1 in the same plane so that more Block breast boards is in splicing in use, very close to each other between adjacent breast boards.
In order to avoid dead bolt 16 departs from step trough 17 in work progress, the jointed shaft 15 of dead bolt 16 and holding tank 14 is circumferentially set Torsion spring 18 is equipped with, torsion spring 18 is used to dead bolt 16 being pressed in step trough 17.Torsion spring 18 protects dead bolt 16 in the presence of elasticity Hold and be inserted in step trough 17, improve the stability and security of breast boards.
As shown in fig. 7, in order to adapt to the earth-retaining of the groove of different depth work, riser 1, baffle plate 4 side wall on equidistantly At least three step troughs 17 are provided with, by changing the position relationship of dead bolt 16 and step trough 17, so as to change the height of breast boards Degree.
Working principle and beneficial effect of the present utility model is as follows:
When carrying out grooving work, when certain depth is arrived in digging, riser 1 is placed on to the two side of groove, rides over transverse slat 3 The soil body upper surface of groove both sides, riser 1 are close to the side wall of groove, reinforced between two risers 1 with cross-brace 2.Then proceed to Grooving is carried out, when certain depth is arrived in digging, rotating lock tongue 16 releases dead bolt 16 away from the step trough 17 of the side wall bottom of baffle plate 4 To the spacing of baffle plate 4, baffle plate 4 is set to stop along the slide downward of slide rail 5 to the soil body.When the limiting stand 8 of baffle plate 4 connects with projection 9 When touching, dead bolt 16 is inserted in the step trough 17 on the side wall top of baffle plate 4 by the pressure of torsion spring 18, is avoided between baffle plate 4 and riser 1 The relative stability and security slided, improve breast boards occurs.
Until when digging to the depth needed, base 10 is inserted in the soil body, the baffle plate 4 of lowermost end is inserted in groove 11, Drainpipe 12 is arranged on baffle plate 4, the delivery port of drainpipe 12 is located at the surface of drainage trough 13, so as to complete breast boards Installation, construction is simple, efficiency high.
Drainpipe 12 drains into the underground water in the soil body in drainage trough 13, and underground water is arranged after flowing into drainage trough 13 by water pump Go out groove, reduce the hydrostatic pressure that riser 1 is subject to, avoid in the foundation soil below Groundwater infiltration base 10, improve breast boards Stability.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.

Claims (7)

1. a kind of channel excavation breast boards, including the riser positioned at groove both sides(1), it is characterised in that:In working condition, two Riser described in block(1)Between be provided with cross-brace(2), the cross-brace(2)Positioned at the riser(1)Top, it is described vertical Plate(1)Multiple baffle plates being mutually slidably connected vertically are provided with away from soil body side(4), the riser(1), baffle plate (4)Slide rail is vertically provided with away from soil body side(5), the baffle plate(4)Towards the slide rail(5)Side is provided with cunning Groove(6), the chute(6)Bottom wall offers slideway along its length(7), the slideway(7)Top is provided with limiting stand (8), the slide rail(5)Bottom, which is provided with, is embedded in the slideway(7)Projection(9);
The riser(1)There is transverse slat on top towards soil body side is horizontal-extending(3);
The baffle plate(4)Underface be provided with base(10), the base(10)The soil body is inserted towards one end of the soil body, it is described Base(10)On offer for the baffle plate(4)The groove of insertion(11);
The baffle plate of lowermost end(4)On be equipped with multiple drainpipes(12), multiple drainpipes(12)From soil body side court To the base(10)Set diagonally downward.
2. channel excavation breast boards according to claim 1, it is characterised in that:The riser(1), multiple baffle plates (4)Along the base(10)The thickness of width increases successively.
3. channel excavation breast boards according to claim 1, it is characterised in that:The base(10)On along its length It is provided with drainage trough(13), the drainage trough(13)Positioned at the drainpipe(12)The underface of outlet.
4. channel excavation breast boards according to claim 1, it is characterised in that:The riser(1)With baffle plate(4), it is adjacent Two pieces of baffle plates(4)Between be provided with snap close piece, the snap close piece is used to limit the riser(1), baffle plate(4)Between cunning It is dynamic.
5. channel excavation breast boards according to claim 4, it is characterised in that:The riser(1), baffle plate(4)Side wall Bottom offers holding tank(14), the snap close piece include and the holding tank(14)The L-type dead bolt of rotation connection(16), it is described Dead bolt(16)Rotate in the horizontal plane, the baffle plate(4)Side wall is provided at both ends with for the dead bolt(16)The step trough of insertion (17), the dead bolt(16)Positioned at the step trough(17)When interior, the dead bolt(16)Lateral wall and the riser(1)Side Wall is in the same plane.
6. channel excavation breast boards according to claim 5, it is characterised in that:The dead bolt(16)With the holding tank (14)The jointed shaft of hinged place(15)It is circumferentially provided with torsion spring(18), the torsion spring(18)For by the dead bolt(16)It is pressed on The step trough(17)It is interior.
7. channel excavation breast boards according to claim 5, it is characterised in that:The riser(1), baffle plate(4)Side wall On be provided with least three step troughs(17).
CN201720597139.8U 2017-05-25 2017-05-25 A kind of channel excavation breast boards Active CN206800441U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720597139.8U CN206800441U (en) 2017-05-25 2017-05-25 A kind of channel excavation breast boards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720597139.8U CN206800441U (en) 2017-05-25 2017-05-25 A kind of channel excavation breast boards

Publications (1)

Publication Number Publication Date
CN206800441U true CN206800441U (en) 2017-12-26

Family

ID=60743113

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720597139.8U Active CN206800441U (en) 2017-05-25 2017-05-25 A kind of channel excavation breast boards

Country Status (1)

Country Link
CN (1) CN206800441U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108360457A (en) * 2018-04-25 2018-08-03 北京泽通水务建设有限公司 A kind of soil stone basket bag side support bracket
CN110306588A (en) * 2019-07-11 2019-10-08 中南大学 A kind of panel module unit and reinforced earth bulkhead for reinforced earth bulkhead
CN116025006A (en) * 2023-01-10 2023-04-28 海泰建设有限公司 Prefabricated assembled column plate combined retaining wall and assembling method thereof
CN117232969A (en) * 2023-11-13 2023-12-15 潍坊华夏膨润土有限公司 Bentonite mud compressive strength test equipment

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108360457A (en) * 2018-04-25 2018-08-03 北京泽通水务建设有限公司 A kind of soil stone basket bag side support bracket
CN108360457B (en) * 2018-04-25 2024-01-02 北京泽通水务建设有限公司 Side support frame for soil-stone cage bag
CN110306588A (en) * 2019-07-11 2019-10-08 中南大学 A kind of panel module unit and reinforced earth bulkhead for reinforced earth bulkhead
CN110306588B (en) * 2019-07-11 2023-12-08 中南大学 Panel module unit for reinforced earth retaining wall and reinforced earth retaining wall
CN116025006A (en) * 2023-01-10 2023-04-28 海泰建设有限公司 Prefabricated assembled column plate combined retaining wall and assembling method thereof
CN116025006B (en) * 2023-01-10 2023-07-28 海泰建设有限公司 Prefabricated assembled column plate combined retaining wall and assembling method thereof
CN117232969A (en) * 2023-11-13 2023-12-15 潍坊华夏膨润土有限公司 Bentonite mud compressive strength test equipment
CN117232969B (en) * 2023-11-13 2024-04-05 潍坊华夏膨润土有限公司 Bentonite mud compressive strength test equipment

Similar Documents

Publication Publication Date Title
CN206800441U (en) A kind of channel excavation breast boards
CN101838993B (en) Construction technology of steel sheet pile cofferdam for Yellow River Channel internal support table construction
CN104196034B (en) A kind of utilize steel sheet pile as the foundation ditch construction method in supporting cofferdam
CN102094425B (en) Foundation pit construction method adopting shallow buried depth Larsen steel plate pile as protective cofferdam
CN206127982U (en) Water blocking device
CN108331000A (en) Caisson sinking construction method
CN110454223B (en) Reverse slope TBM tunneling tunnel drainage construction method
CN106276056B (en) Multi-segmental combined type earthwork perpendicular lifting apparatus
CN111827328A (en) Subway deep foundation pit well point dewatering system and construction method thereof
CN105625420B (en) A kind of extension type support with manually dug piles construction and its construction method
CN109629582B (en) Special-shaped drainage slide-resistant pile and construction method thereof
CN107326928A (en) A kind of part is related to the construction method in the deeper subsurface garage of basement
CN107354950A (en) A kind of economic quickly catch pit local dewatering method
CN109653225A (en) Steel sheet-pile cofferdam and its construction method
CN105332382A (en) River-adjacent-foundation-pit island-building cofferdam clay sealing construction method
CN208089344U (en) A kind of tunnel drainage system
CN106480979B (en) A kind of active antiseepage basement shear wall and its construction technology
CN102787608A (en) Gravity type foundation pit supporting system under vacuum effect and construction method
CN106869236B (en) Horizontal storage tank for sponge urban rainwater collection system and construction method of horizontal storage tank
CN206784320U (en) A kind of geomembrane air exit
CN206289732U (en) A kind of active antiseepage basement shear wall
CN202247922U (en) Water lowering and discharging device for water collecting well in blind ditch with deep base pit
CN112459834B (en) Water collecting well, counter-slope tunnel and counter-slope tunnel drainage method
CN110344390B (en) Construction method of draining system for high-moisture-content silty soil
CN212772252U (en) Gallery inlet plugging body structure using transverse traffic galleries to replace diversion bottom holes

Legal Events

Date Code Title Description
GR01 Patent grant