CN206143936U - Basement outer wall post -cast strip shutoff waterproof construction - Google Patents
Basement outer wall post -cast strip shutoff waterproof construction Download PDFInfo
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- CN206143936U CN206143936U CN201621053935.7U CN201621053935U CN206143936U CN 206143936 U CN206143936 U CN 206143936U CN 201621053935 U CN201621053935 U CN 201621053935U CN 206143936 U CN206143936 U CN 206143936U
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- wall
- cover plate
- elastic webbing
- basement
- poured band
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Abstract
The utility model discloses a basement outer wall post -cast strip shutoff waterproof construction, include buried bolt, blocking cover plate, stagnant water elastic webbing and lock nut in advance, in advance in the wall body around the pre -buried outdoor wall post -cast strip underground of buried bolt's first end, buried bolt's second end stretches out in advance the wall body, the blocking cover plate lid is established the outside of basement outer wall post -cast strip, the stagnant water elastic webbing is located blocking cover plate with between the wall body, the stagnant water elastic webbing with blocking cover plate passes buried bolt's second is held in advance, locking nut installed is in buried bolt's second end makes in advance the blocking cover plate pre -compaction is in on the stagnant water elastic webbing. Basement outer wall post -cast strip shutoff waterproof construction, elastic deformation can take place for the stagnant water elastic webbing under the effect of blocking cover plate's precompression, the closely knit gap of filling contact surface between wall body and the blocking cover plate, shutoff water -proof effects is good, can guarantee the engineering quality, shortens construction period.
Description
Technical field
This utility model is related to block waterproof technique field, more particularly to a kind of poured band of outer wall of basement closure waterproof knot
Structure.
Background technology
With complicated various, the continuous intensification of basement ground depth of modern architecture version, in order to solve knot
Structure is complicated to pour the ununiform shrinkage of body of wall, cracking, seepy question compared with long concrete, generally using late poured band structure, that is, adopts
The construction method of one ribbon concrete of late days teeming.During design of basement has the engineering of post-cast strip, after basement
Pour band and its both sides exterior wall wants the longer contraction time of indwelling, follow-up waterproof and backfill construction can be affected.In order to carry out ground in time
Backfill construction is enclosed in lower outdoor, shortens the construction period, and generally requiring carries out closure waterproof to post-cast strip.
Traditional, post-cast strip closure waterproof construction can be summarized as two kinds of forms：One kind is precast slab closure waterproof
Structure, arranges precast slab on the outside of post-cast strip, but precast slab only blocks the effect for stopping backfill, when after
When pouring with there is crack and the concrete of both sides between, it may appear that leakage problem；Another kind is that steel plate adds waterproof mortar to block
Waterproof construction, arranges the firm plate of closure on the outside of post-cast strip, steel plate is by the embedded bar drawknot in the body of wall of basement post-pouring zone both sides
Fixed, steel plate periphery smears waterproof mortar, but, steel plate is different from the material of waterproof mortar, and thermal expansion expansion and contraction is different, its knot
Be likely to occur at conjunction gap, also, waterproof mortar usually can be bonding insecure with xoncrete structure and steel plate and come off, room
Outer underground water energy enough enters xoncrete structure by post-cast strip gap, and then causes waterproof construction to fail, and has a strong impact on engineering matter
Amount.Therefore, all there is waterproof defect in above two structure, does not reach closure waterproof quality standard and requires.
The content of the invention
Based on this, this utility model is the defect for overcoming prior art, there is provided a kind of closure good water-proof effect, Neng Goubao
Card construction quality, shortens the poured band of outer wall of basement closure waterproof construction of construction period.
Its technical scheme is as follows：
A kind of poured band of outer wall of basement blocks waterproof construction, including pre-embedded bolt, closure cover plate, sealing elastic webbing and
Locking nut, the first end of the pre-embedded bolt are embedded in the body of wall around poured band of outer wall of basement, the pre-embedded bolt
The second end stretch out the body of wall, the closure cover plate lid is located at the outside of the poured band of outer wall of basement, the sealing bullet
Property band be located at it is described closure cover plate and the body of wall between, the sealing elastic webbing with it is described closure cover plate pass through the pre-buried spiral shell
Second end of bolt, the locking nut are arranged on the second end of the pre-embedded bolt, the closure cover plate precompressed is stopped described
On water elastic webbing.
Wherein in one embodiment, the pre-embedded bolt is multiple, and multiple pre-embedded bolts are embedded in outside the room of underground
In the body of wall of wall post-cast strip both sides and bottom, the sealing elastic webbing, the closure cover plate are in the poured band of outer wall of basement
Both sides and bottom be pressed on the body of wall.
Wherein in one embodiment, the body of wall edge of the poured band of outer wall of basement both sides and bottom is reserved with peace
Dress groove, the pre-embedded bolt are embedded in the installation groove, and the sealing elastic webbing is arranged in the installation groove, institute
State closure cover plate lid to be located on the sealing elastic webbing.
Wherein in one embodiment, the sealing elastic webbing is the U-shape structure with the structure matching for installing groove.
Wherein in one embodiment, the poured band of outer wall of basement closure waterproof construction also includes waterproof roll or anti-
Water conservation layer, the waterproof roll or fish tail and waterproof layer be laid in it is described closure cover plate outside and the capping panel area
Body of wall on.
Wherein in one embodiment, the curved structure of first end of the pre-embedded bolt, the second of the pre-embedded bolt
End is provided with the screw thread for coordinating with the locking nut.
Wherein in one embodiment, set with the pre-buried position corresponding section of the pre-embedded bolt on the sealing elastic webbing
Flexible band pilot hole.
Wherein in one embodiment, the outline chi of the outer profile size and the sealing elastic webbing for blocking cover plate
It is very little consistent, cover plate pilot hole is provided with the rigging position corresponding section of the pre-embedded bolt on the closure cover plate.
Wherein in one embodiment, the poured band of outer wall of basement closure waterproof construction also includes steel plate for sealing water, institute
State steel plate for sealing water to be arranged in the body of wall of the poured band of outer wall of basement both sides.
Wherein in one embodiment, the torsional moment of tightening of the locking nut is 40Nm～65Nm.
The beneficial effects of the utility model are：
The poured band of outer wall of basement blocks waterproof construction, blocks cover plate and has the envelope for stopping outer wall of basement backfill
Stifled effect, by arranging sealing elastic webbing between the body of wall around poured band of outer wall of basement and closure cover plate, blocks steel plate
Can coordinate with pre-embedded bolt, by tightening the locking nut on pre-embedded bolt so that closure cover plate compresses sealing bullet
Property band, there is elastic deformation in sealing elastic webbing under the precompression effect of closure cover plate, and then closely knit can fill up body of wall with envelope
The gap of contact surface between blanking cover plate, reaches effective sealed waterproof effect, and then realizes closure and seal waterproof；Also, wall
When body and closure cover plate change under the ambient temperature expanded with heat and contract with cold, gap can be produced as its shrinkage factor is inconsistent, now, only
Water elastic webbing still can occur elastic deformation under the precompression set up, and still closely knit can fill up and contact between body of wall and closure cover plate
The gap in face, blocks good water-proof effect.The poured band of outer wall of basement blocks waterproof construction, closure good water-proof effect, can
Ensure construction quality, shorten the construction period.
Description of the drawings
Fig. 1 is the front view that the poured band of outer wall of basement described in this utility model embodiment blocks waterproof construction；
Fig. 2 is the A-A sectional views in Fig. 1；
Fig. 3 is the mplifying structure schematic diagram at A in Fig. 2；
Fig. 4 is the structural representation of the pre-embedded bolt described in this utility model embodiment.
Fig. 5 is the front view of the sealing elastic webbing described in this utility model embodiment.
Fig. 6 is the front view of the closure cover plate described in this utility model embodiment.
Description of reference numerals：
10th, pre-embedded bolt, 12, screw thread, 20, closure cover plate, 22, cover plate pilot hole, 30, sealing elastic webbing, 32, elastic webbing
Pilot hole, 40, locking nut, 50, elastic washer, 60, waterproof roll, 70, steel plate for sealing water, 100, poured band of outer wall of basement,
200th, body of wall, 210, install groove.
Specific embodiment
Below embodiment of the present utility model is described in detail：
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of poured band of outer wall of basement blocks waterproof construction, including pre-embedded bolt 10, envelope
Blanking cover plate 20, sealing elastic webbing 30 and locking nut 40, after the first end of the pre-embedded bolt 10 is embedded in outer wall of basement
Pour with the body of wall 200 around 100, the body of wall 200 is stretched out at the second end of the pre-embedded bolt 10, and the closure cover plate 20 is covered
The outside of the poured band of outer wall of basement 100 is located at, the sealing elastic webbing 30 is located at the closure cover plate 20 and the wall
Between body 200, the sealing elastic webbing 30 passes through the second end of the pre-embedded bolt 10, the locking with the closure cover plate 20
Nut 40 is arranged on the second end of the pre-embedded bolt 10, the closure cover plate 20 is pressed on the sealing elastic webbing 30 in advance.
In the present embodiment, the sealing elastic webbing 30 is sealing rubber strip, and the closure cover plate 20 is closure steel plate.The locking nut
40 torsional moment of tightening is 40Nm～65Nm, and then can effectively ensure that sealing elastic webbing 30 is issued in the precompression set up
Change shape, it is ensured that effectively seals water resistance, and being unlikely to firmly excessive again causes pre-embedded bolt 10 to rupture.
The poured band of outer wall of basement blocks waterproof construction, blocks cover plate 20 and has stop outer wall of basement backfill
Plugging action, by arranging sealing elastic webbing between the body of wall 200 around poured band of outer wall of basement 100 and closure cover plate 20
30, closure steel plate can be coordinated with pre-embedded bolt 10, by tightening the locking nut 40 on pre-embedded bolt 10 so that envelope
Blanking cover plate 20 compresses sealing elastic webbing 30, and sealing elastic webbing 30 occurs elastic deformation under the precompression effect of closure cover plate 20,
And then closely knit can fill up body of wall 200 and block the gap of contact surface between cover plate 20, effective sealed waterproof effect is reached, is entered
And realize closure and seal waterproof；Also, when body of wall 200 and closure cover plate 20 change under the ambient temperature expanded with heat and contract with cold, by
Gap can be produced in its shrinkage factor is inconsistent, now, the elastic deformation of watertight rubber band allows deformation model in the precompression set up
Still there is elastic deformation in enclosing, still closely knit can fill up the gap of contact surface between body of wall 200 and closure cover plate 20, closure is anti-
Water effect is good, can preferably solve the problems, such as post-cast strip seepage.Poured band of outer wall of basement closure described in the present embodiment is anti-
Water-bound, by arranging closure cover plate 20, can fulfil backfilling of earthwork plugging construction ahead of schedule, shorten the construction period, improve construction effect
Rate,
In the present embodiment, the pre-embedded bolt 10 is multiple, after multiple pre-embedded bolts 10 are embedded in outer wall of basement
Pour in the body of wall 200 with 100 both sides and bottom, the sealing elastic webbing 30, the closure cover plate 20 are in the outer wall of basement
The both sides and bottom of post-cast strip 100 are pressed on the body of wall 200.By at 100 both sides of poured band of outer wall of basement and bottom
The pre-buried pre-embedded bolt 10 in the body of wall 200 in portion, sealing elastic webbing 30 is coordinated with closure cover plate 20 realizes closure waterproof effect
During fruit, can realize blocking waterproof in the both sides of poured band of outer wall of basement 100 and bottom, i.e., to poured band of outer wall of basement
100 may all be sealed where water inlet, block and good water-proof effect.Corresponding, the locking nut 40 is also multiple, use
In coordinating with corresponding pre-embedded bolt 10, the closure cover plate 20 is locked on each position.Specifically, the pre-embedded bolt 10
According to 100 structure of the poured band of outer wall of basement, U-shaped arrangement is embedded in poured band of outer wall of basement 100 weeks at a certain distance
In the body of wall 200 for enclosing, and then ensure the effectiveness of whole closure waterproof construction.The quantity of the pre-embedded bolt 10, specification and
Arrangement pitch can be arranged according to the concrete structure shape situation of codes and standards, performance and post-cast strip.
In the present embodiment, 200 edge of body of wall of 100 both sides of the poured band of outer wall of basement and bottom is reserved with installation
Groove 210, the pre-embedded bolt 10 are embedded at the installation groove 210, and the sealing elastic webbing 30 is arranged on the installation
In groove 210, closure cover plate 20 lid is located on the sealing elastic webbing 30.Using said structure, sealing elastic webbing 30 is pacified
It is mounted in the installation groove 210, sealing elastic webbing 30 is coordinated with closure cover plate 20 can be in poured band of outer wall of basement 100
Both sides and bottom are realized blocking waterproof, and poured band of outer wall of basement 100 may be all sealed where water inlet, closure and
Good water-proof effect；When there is elastic deformation under the precompression effect for blocking cover plate 20 in sealing elastic webbing 30, sealing elastic webbing 30
It is bigger with the contact area of body of wall 200, and then sealing effectiveness is also more preferably, after can further improve the outer wall of basement of the present embodiment
Pour the closure with closure waterproof construction and water resistance；Additionally, after sealing elastic webbing 30 is installed, will not take on the outside of body of wall 200
Space, will not outside construction be caused to interfere, and structure is attractive in appearance.
In the present embodiment, the poured band of outer wall of basement closure waterproof construction also includes elastic washer 50, the elasticity
Packing ring 50 is set on the pre-embedded bolt 10, and the elastic washer 50 is located at the closure cover plate 20 and the locking nut
Between 40, the elastic washer 50 is coordinated with the locking nut 40 realizes that locking is acted on.Specifically, the elastic washer 50 with
Locking nut 40 adopts mechanical standard parts, and cost is relatively low, and can ensure that locking nut 40 is connected with pre-embedded bolt 10 and used
Effectiveness in journey.The poured band of outer wall of basement closure waterproof construction also includes waterproof roll 60 or fish tail and waterproof layer, institute
State waterproof roll 60 or fish tail and waterproof layer be laid in the closure cover plate 20 outside and the closure cover plate 20 around wall
On body 200.By laying waterproof volume on the body of wall 200 around the outside of the closure cover plate 20 and the closure cover plate 20
Material 60 or fish tail and waterproof layer, can further function as waterproof action, improve waterproof effect.Signal in the accompanying drawing of the present embodiment is processed and is set
Put the situation of waterproof roll 60.The poured band of outer wall of basement closure waterproof construction also includes steel plate for sealing water 70, the sealing
Steel plate 70 is arranged in the body of wall 200 of 100 both sides of the poured band of outer wall of basement.By arranging steel plate for sealing water 70, can play
The press water of outside is prevented to permeate the ground the effect of room.
As shown in Figure 3, Figure 4, the curved structure of the first end of the pre-embedded bolt 10, the second end of the pre-embedded bolt 10
It is provided with the screw thread 12 for coordinating with the locking nut 40.The first end of pre-embedded bolt 10 is convexly curved structure, and then, energy
The breakout capacity of pre-embedded bolt 10 is improved enough, it is ensured that when locking nut 40 is tightened, the pre-embedded bolt 10 is not pulled out and loses
Effect, the second end of pre-embedded bolt 10 are provided with screw thread 12, for the locking with the locking sealing elastic webbing 30 and closure cover plate 20
Nut 40 is assembled.
As shown in Fig. 2, Fig. 5, the sealing elastic webbing 30 is the U-shape structure with the structure matching for installing groove 210.
By sealing elastic webbing 30 is arranged to U-shape structure, on the one hand, so that the inner side of sealing elastic webbing 30 is engraved structure, pre-
Under pressure effect, the thickness of sealing elastic webbing 30 reduces, and in the case of constancy of volume, sealing elastic webbing 30 can be to circumferential expansion, U
Type structure can give sealing elastic webbing 30 sufficient dilation space, be further ensured that body of wall 200 and closure cover plate 20 it
Between contact surface closely knit laminating；On the other hand, contact surface gap between body of wall 200 and closure cover plate 20 can closely knit filled up
On the basis of, also can material-saving, it is and then cost-effective.In the present embodiment, with the pre-embedded bolt on the sealing elastic webbing 30
10 pre-buried position corresponding section is provided with elastic webbing pilot hole 32.By reserved elastic webbing pilot hole 32, sealing elasticity is capable of achieving
Assembling with 30 Yu pre-embedded bolt 10, later stage assembling installation processing ease, effectively can use manpower and material resources sparingly resource, and raising is applied
Work efficiency rate.Further, the aperture of the elastic webbing pilot hole 32 can be configured to the diameter slightly larger than pre-embedded bolt 10, such as may be used
To be set to 1.1 times of 10 diameters of pre-embedded bolt, on the premise of closure water-proof function is ensured, be conducive to the suitable of sealing elastic webbing 30
Profit positioning and installation.The thickness of the sealing elastic webbing 30 could be arranged to 10mm-15mm, can play effective waterproof sealing
Effect.
As described in Fig. 2, Fig. 6, the outline chi of the outer profile size and the sealing elastic webbing 30 for blocking cover plate 20
It is very little consistent, cover plate pilot hole 22 is provided with the rigging position corresponding section of the pre-embedded bolt 10 on the closure cover plate 20.It is logical
Reserved cover plate pilot hole 22 is crossed, closure cover plate 20 can realize the assembling with pre-embedded bolt 10, later stage assembling installation operation
Easily, effectively can use manpower and material resources sparingly resource, improve efficiency of construction, and by the outer profile size of closure cover plate 20 is configured to
Consistent with the outer profile size of sealing elastic webbing 30, closure cover plate 20 can effectively apply precompression to sealing elastic webbing 30,
Ensure that sealing elastic webbing 30 closely knit can fill up the gap of contact surface between body of wall 200 and closure cover plate 20.Further, the lid
The aperture of plate pilot hole 22 can be configured to the diameter slightly larger than pre-embedded bolt 10, such as could be arranged to 1.2 times of pre-embedded bolts 10
Diameter, on the premise of closure water-proof function is ensured, closure cover plate 20 can smoothly be positioned and be installed.The closure cover plate 20
Thickness could be arranged to 8mm-12mm, and structural strength is good, can play effectively closure waterproof action.It is described closure cover plate 20 be
Rectangle tabular structure, can effectively play plugging action, and compress the sealing elastic webbing 30.
Poured band of outer wall of basement closure waterproof construction described in the present embodiment, by arranging closure cover plate 20, can be in advance
The construction of backfill is carried out, shortens the construction period；By arranging pre-embedded bolt 10, sealing elastic webbing 30 and locking nut 40,
Pre-embedded bolt 10 is coordinated with locking nut 40 tightens up closure cover plate 20 so that closure cover plate 20 and sealing elastic webbing 30, sealing bullet
Property with the closely knit contact of contact surface between 30 and body of wall 200, can ensure construction quality on the premise of, long-time realize closure
Waterproof effect, long service life, further, it is possible to make body of wall 200 and closure steel plate around poured band of outer wall of basement 100 in heat
Under conditions of swollen shrinkage, effectively closure waterproof effect is still ensured that；By being coordinated with locking nut 40 using pre-embedded bolt 10
Structure realize locking, it is not necessary to welding procedure, simple structure, processing and fabricating convenience, processing ease, cost are relatively low, flexible side
Just, environmental protection.
Each technical characteristic of embodiment described above arbitrarily can be combined, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, some deformations and improvement can also be made, these belong to
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be defined by claims.
Claims (10)
1. a kind of poured band of outer wall of basement blocks waterproof construction, it is characterised in that including pre-embedded bolt, closure cover plate, sealing
Elastic webbing and locking nut, the first end of the pre-embedded bolt are embedded in the body of wall around poured band of outer wall of basement, institute
The body of wall is stretched out at the second end for stating pre-embedded bolt, and the closure cover plate lid is located at the outside of the poured band of outer wall of basement,
The sealing elastic webbing is located between the closure cover plate and the body of wall, and the sealing elastic webbing is passed through with the closure cover plate
Second end of the pre-embedded bolt, the locking nut are arranged on the second end of the pre-embedded bolt, make the closure cover plate pre-
It is pressed on the sealing elastic webbing.
2. poured band of outer wall of basement according to claim 1 blocks waterproof construction, it is characterised in that the pre-embedded bolt
For multiple, multiple pre-embedded bolts are embedded in the body of wall of poured band of outer wall of basement both sides and bottom, the sealing elasticity
Band, the closure cover plate are pressed on the body of wall in the both sides and bottom of the poured band of outer wall of basement.
3. poured band of outer wall of basement according to claim 1 blocks waterproof construction, it is characterised in that outside the underground room
The body of wall edge of wall post-cast strip both sides and bottom is reserved with installation groove, and the pre-embedded bolt is embedded in the installation groove
Place, the sealing elastic webbing are arranged in the installation groove, and the closure cover plate lid is located on the sealing elastic webbing.
4. poured band of outer wall of basement according to claim 3 blocks waterproof construction, it is characterised in that the sealing elasticity
Band is the U-shape structure with the structure matching for installing groove.
5. poured band of outer wall of basement according to claim 1 blocks waterproof construction, it is characterised in that also roll up including waterproof
Material or fish tail and waterproof layer, the waterproof roll or fish tail and waterproof layer be laid in it is described closure cover plate outside and the capping
On the body of wall of panel area.
6. the poured band of outer wall of basement according to any one of Claims 1 to 5 blocks waterproof construction, it is characterised in that institute
State the curved structure of first end of pre-embedded bolt, the second end of the pre-embedded bolt is provided with for being coordinated with the locking nut
Screw thread.
7. the poured band of outer wall of basement according to any one of Claims 1 to 5 blocks waterproof construction, it is characterised in that institute
State elastic webbing pilot hole is provided with the pre-buried position corresponding section of the pre-embedded bolt on sealing elastic webbing.
8. the poured band of outer wall of basement according to any one of Claims 1 to 5 blocks waterproof construction, it is characterised in that institute
The outer profile size for stating closure cover plate is consistent with the outer profile size of the sealing elastic webbing, pre- with described on the closure cover plate
The rigging position corresponding section for burying bolt is provided with cover plate pilot hole.
9. the poured band of outer wall of basement according to any one of Claims 1 to 5 blocks waterproof construction, it is characterised in that also
Including steel plate for sealing water, the steel plate for sealing water is arranged in the body of wall of the poured band of outer wall of basement both sides.
10. the poured band of outer wall of basement according to any one of claim 1-5 blocks waterproof construction, it is characterised in that institute
That states locking nut tightens torsional moment for 40Nm～65Nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621053935.7U CN206143936U (en) | 2016-09-13 | 2016-09-13 | Basement outer wall post -cast strip shutoff waterproof construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621053935.7U CN206143936U (en) | 2016-09-13 | 2016-09-13 | Basement outer wall post -cast strip shutoff waterproof construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206143936U true CN206143936U (en) | 2017-05-03 |
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ID=58618262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621053935.7U Active CN206143936U (en) | 2016-09-13 | 2016-09-13 | Basement outer wall post -cast strip shutoff waterproof construction |
Country Status (1)
| Country | Link |
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| CN (1) | CN206143936U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108203997A (en) * | 2018-02-09 | 2018-06-26 | 南通华新建工集团有限公司 | For the prefabricated board and its construction method closed on the outside of post-cast strip |
| CN109931080A (en) * | 2019-03-06 | 2019-06-25 | 上海隧道工程有限公司 | Pipe curtain mortar filling device and its construction method |
-
2016
- 2016-09-13 CN CN201621053935.7U patent/CN206143936U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108203997A (en) * | 2018-02-09 | 2018-06-26 | 南通华新建工集团有限公司 | For the prefabricated board and its construction method closed on the outside of post-cast strip |
| CN109931080A (en) * | 2019-03-06 | 2019-06-25 | 上海隧道工程有限公司 | Pipe curtain mortar filling device and its construction method |
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