CN107060364A - A kind of masonry wall wall antiknock ruggedized construction - Google Patents
A kind of masonry wall wall antiknock ruggedized construction Download PDFInfo
- Publication number
- CN107060364A CN107060364A CN201710305862.9A CN201710305862A CN107060364A CN 107060364 A CN107060364 A CN 107060364A CN 201710305862 A CN201710305862 A CN 201710305862A CN 107060364 A CN107060364 A CN 107060364A
- Authority
- CN
- China
- Prior art keywords
- wall
- fabric sheet
- steel fabric
- antiknock
- fixed frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 77
- 239000010959 steel Substances 0.000 claims abstract description 77
- 239000004744 fabric Substances 0.000 claims abstract description 60
- 230000002787 reinforcement Effects 0.000 claims abstract description 28
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000002956 ash Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 239000005060 rubber Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 239000012634 fragment Substances 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 7
- 239000004567 concrete Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- KRQUFUKTQHISJB-YYADALCUSA-N 2-[(E)-N-[2-(4-chlorophenoxy)propoxy]-C-propylcarbonimidoyl]-3-hydroxy-5-(thian-3-yl)cyclohex-2-en-1-one Chemical compound CCC\C(=N/OCC(C)OC1=CC=C(Cl)C=C1)C1=C(O)CC(CC1=O)C1CCCSC1 KRQUFUKTQHISJB-YYADALCUSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Retaining Walls (AREA)
Abstract
The present invention provides a kind of masonry wall wall antiknock ruggedized construction, including wall, mortar, steel fabric sheet and fixed frame, steel fabric sheet is layed on fixed frame, fixed frame is provided with pin, one end of pin and wall are affixed by fastener and wall connecting between steel fabric sheet and wall, the other end of pin and steel fabric sheet are affixed, the outside of steel fabric sheet is provided with reinforcement, and the two ends of reinforcement are connected through steel fabric sheet and with fixed frame, and mortar is coated on steel fabric sheet and reinforcement.The present invention makes wall under Blast Loads, will not collapsed by setting steel fabric sheet, pin connecting wall and steel fabric sheet；The outside of steel fabric sheet is provided with reinforcement, and the two ends of reinforcement are connected through steel fabric sheet and with fixed frame, improves steel fabric sheet intensity and masonry wall resists the ability of lateral load, limit or delay the cracking of wall.Make from wall depart from fragment ejection velocity it is slack-off, quantity reduce, improve wall antiknock ability.
Description
Technical field
The present invention relates to wall antiknock reinforcement technique field, and in particular to a kind of masonry wall wall antiknock ruggedized construction.
Background technology
The attack of terrorism and occasional burst often constitute serious threat to personal safety.The shock wave produced explode to crisp
The masonry filler wall of property can cause serious destruction.Masonry wall Blast Load effect under easily cause wall cave in and
Separation of fragments etc. is destroyed, and after peak overpressure reaches certain numerical value, the life security to personnel threatens.Because fragment causes
Injures and deaths and damage effect can not be ignored, in order to prevent or mitigate destruction, it would be desirable to masonry wall carry out antiknock reinforcing so that
Prevent that wall from caving in and reducing the number of tiles departed from from wall.
The wall reinforcement method of current masonry wall has many kinds, angle steel outer packed strengthening method, reinforced concrete clamping plate reinforcement method, water
Mud grouting method, expansion masonry method of section.Reinforced concrete clamping plate reinforcement method is to set clamping plate on the surface of concrete component, by clamping plate
As its protection materials, make clamping plate and component cooperation itself, overall stress, to improve a kind of reinforcing side of structural bearing capacity
Method.
But there is following defect in above-mentioned reinforcing mode：In existing masonry wall material, concrete, brick belongs to crisp
Property material.The characteristics of mechanical property of brittle material is that compression strength is much larger than tensile strength, and ultimate strain value during destruction is minimum.
When existing masonry wall is by Blast Load, the unexpected destruction of absence of aura occurs for fragile material, and without obvious modeling during destruction
Property deformation property, it is easy to cracking and crack development speed quickly, crushing-type fragmentates.Fragment ejection velocity is fast, quantity
Many, size is small, and can not effectively limit or delay the cracking of existing masonry wall.
The content of the invention
(1) technical problem to be solved
It is an object of the invention to provide a kind of masonry wall wall antiknock ruggedized construction, to solve in existing antiknock reinforcing mode
Masonry wall cracking crushing-type fragmentate, and fragment ejection velocity is fast, and quantity is more, the problem of size is small, reduces wall in blast
Deformation under load action, improves masonry wall resistance lateral load and antiknock ability.
(2) technical scheme
In order to solve the above-mentioned technical problem, the present invention provides a kind of masonry wall wall antiknock ruggedized construction, including：Wall and
Mortar, in addition to steel fabric sheet and fixed frame, the steel fabric sheet are layed on the fixed frame, and the fixed frame leads to
Fastener and the wall connecting are crossed, multiple pins, one end of the pin and institute are provided between the steel fabric sheet and wall
State that wall is affixed, the other end of the pin and the steel fabric sheet are affixed, the outside of the steel fabric sheet is provided with reinforcement, institute
The two ends of reinforcement are stated through the steel fabric sheet and are connected with the fixed frame, the mortar is coated on the steel fabric sheet
With on reinforcement.
Wherein, the frame of the fixed frame is provided with screw rod, and the edge of the steel fabric sheet is provided with to be connected with the screw rod
The draw ring connect.
Wherein, the steel fabric sheet is high strength steel mesh.
Wherein, it is 25-35mm to be coated on the steel fabric sheet with the mortar thickness on reinforcement.
Wherein, the mortar includes binder materials, water, rubber powder, water reducer and sand, the binder materials, water, rubber powder, subtracts
The ratio of aqua and sand is 1000：220~240：10~30：5~7：1500~2500.
Wherein, the binder materials includes cement, silicon ash and flyash, and the ratio of the cement, silicon ash and flyash is
20：2~3：2~3.
Wherein, it is coated with metope surface layer on the mortar.
Wherein, the frame of the fixed frame is made by angle steel.
Wherein, the angle steel is fixed on the surface of the wall by chemical bolt.
(3) beneficial effect
Compared with prior art, the invention has the advantages that：
1) tectonic sieving of the present invention is reasonable, simple in construction, easy construction, the caking property between enhancing masonry wall and screed
Can, it is ensured that the cooperation of masonry wall and mortar.
2) by steel fabric sheet Strengthened Masonry Walls wall, and pin connecting wall and steel fabric sheet are set, make bracing means and wall
Body integration, building block is caught using steel fabric sheet, and cement-based material is linked to be entirety with steel fabric sheet, reduces wall in explosive load
The lower deformation of effect, keeps wall not collapse destruction, the antiknock ability of raising wall.
3) by being provided with reinforcement in the outside of steel fabric sheet, the two ends of reinforcement pass through steel fabric sheet and and fixed frame
Connection, significantly increases the ability of the resistance lateral load of masonry wall, and can effectively limit or delay opening for existing masonry wall
Split.
4) present invention effectively improves the globality, rigidity and intensity of masonry wall, casts the fragment departed from from wall
Slow, number of tiles is greatly reduced, chip size diminishes；Can absorb larger energy, produce certain deformation and
Do not destroy, it will be apparent that improve the antiknock ability of existing masonry wall.
Brief description of the drawings
Fig. 1 is a kind of structural representation of masonry wall wall antiknock ruggedized construction of the invention；
Fig. 2 is a kind of organigram of masonry wall wall antiknock ruggedized construction of the invention；
Fig. 3 is a kind of diagrammatic cross-section of masonry wall wall antiknock ruggedized construction of the invention；
Description of reference numerals
1- metope surface layers；2- mortars；3- reinforced mesh；4- steel fabric sheets；5- masonry walls to be reinforced；6- fixed frames；7-
Screw rod；8- nuts.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Following instance
For illustrating the present invention, but it is not limited to the scope of the present invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As shown in figure 1, be a kind of masonry wall wall antiknock ruggedized construction of the present embodiment, including：The wall of masonry wall 5 to be reinforced
Body, screed 2, steel fabric sheet 4, reinforcement and fixed frame 6.
The steel fabric sheet 4 is layed on fixed frame 6.Wherein, the edge of steel fabric sheet 4 and fixed frame 6 are affixed.This
In embodiment, the frame of fixed frame 6 is provided with screw rod 7；The edge of the steel fabric sheet 4 is provided with what is be connected with the screw rod 7
Draw ring.Wherein, the steel fabric sheet 4 is high strength steel mesh.The grid area of the high strength steel mesh is 36cm2
(6cm*6cm)。
Fixed frame 6 passes through fastener and the wall connecting of masonry wall 5 to be reinforced.In the present embodiment, the fixed frame 6
Frame be made by angle steel.Angle steel is fixed on the surface of wall of masonry wall 5 to be reinforced by chemical bolt, and on the outside of angle steel
Reserved steel bar is welded with angular edge.
Multiple pins are provided between the wall of steel fabric sheet 4 and masonry wall to be reinforced 5, one end of pin, which is extended into, waits to reinforce
In the wall of masonry wall 5, and it is affixed with wall, and the other end of pin and the steel fabric sheet 4 are affixed.
The outside of the steel fabric sheet 4 is provided with reinforcement, and the two ends of reinforcement are through steel fabric sheet 4 and with being welded on fixation
Reserved steel bar connection on framework 6.As shown in Figure 2,3, reinforcement forms reinforced mesh 3 in the overlap joint spot welding of direction in length and breadth.This reality
Apply in example, the grid area of the reinforced mesh 3 of reinforcement formation is 144cm2(12cm*12cm)。
Mortar is coated on steel fabric sheet 4 with forming screed 2 on reinforced mesh 3.Further, applied on the screed 2
It is covered with metope surface layer 1.Wherein, the thickness of screed 2 is 25-35mm.Mortar include binder materials, water, rubber powder, water reducer and
Sand, the binder materials, water, rubber powder, the ratio of water reducer and sand are 1000：220~240：10~30：5~7：1500~
2500.The binder materials includes cement, silicon ash and flyash, and the ratio of the cement, silicon ash and flyash is 20：2~3：2
~3.
In the present embodiment, binder materials, water, rubber powder, the ratio of water reducer and sand are 1000：230：20：6：2000；Water
The ratio of mud, silicon ash and flyash is 8：1：1；Screed thickness is 30mm.
Below by specific work progress, further detailed description.(because the work progress of wall both sides is identical,
It is brief for description, be only described below with side wall construction)
The metope for treating Strengthened Masonry Walls wall 5 first is handled；Positioning drilling (is changed on the metope of masonry wall 5 to be reinforced
Learn the mounting hole of bolt), and metope is cleaned up.
Steel fabric sheet 4 is laid on fixed frame 6；Pass through the draw ring and the spiral shell on fixed frame 6 of the edge of steel fabric sheet 4
Bar 7 is connected, and regulation positioning makes steel fabric sheet 4 tighten fixation.
Fixed frame 6 is installed on the metope of masonry wall 5 to be reinforced；The frame of fixed frame 6 is made up of angle steel.Angle steel leads to
Chemical bolt is crossed to be fixedly mounted on wall.
Pin is installed；Pin, one end extension of pin are installed between the wall of steel fabric sheet 4 and masonry wall to be reinforced 5
In the wall for entering masonry wall 5 to be reinforced, and it is affixed with wall, and the other end of pin and the steel fabric sheet 4 are affixed.
Reinforcement is installed；By preprocessing, multiple reinforcement spot welding form reinforced mesh 3.Adding for reinforced mesh 3 will be constituted
Strengthening tendons two ends pass through steel fabric sheet 4, and affixed with the reserved steel bar that is welded on fixed frame 6, and then and wall connecting.
Mortar formation screed 2 is coated on steel fabric sheet 4 and reinforced mesh 3；Finally, metope is coated on screed 2
Surface layer 1.
The present embodiment provides a kind of masonry wall wall antiknock ruggedized construction, the masonry wall for setting steel fabric sheet to reinforce, pin
Connecting wall and steel fabric sheet；Reinforcement is provided with the outside of steel fabric sheet, the two ends of reinforcement are through steel fabric sheet and with consolidating
Determine framework connection.On the one hand, deformation of the wall under Blast Loads is reduced, it is ensured that masonry wall and screed cooperation,
And larger energy can be absorbed, certain deformation is produced without destroying, it will be apparent that improve the antiknock ability of existing masonry wall；
On the other hand, the globality, rigidity and intensity of masonry wall are effectively improved, the resistance lateral load of masonry wall is significantly increased
Ability, effectively limit or delay the cracking of existing masonry wall.Make the fragment ejection velocity from wall disengaging slack-off, number of tiles
It is greatly reduced, chip size diminishes.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (9)
1. a kind of masonry wall wall antiknock ruggedized construction, including：Wall and mortar, it is characterised in that also including steel fabric sheet and
Fixed frame, the steel fabric sheet is layed on the fixed frame, and the fixed frame is connected by fastener and the wall
Connect, multiple pins are provided between the steel fabric sheet and wall, one end of the pin and the wall are affixed, the pin
The other end and the steel fabric sheet are affixed, and the outside of the steel fabric sheet is provided with reinforcement, and the two ends of the reinforcement pass through institute
State steel fabric sheet and be connected with the fixed frame, the mortar is coated on the steel fabric sheet and reinforcement.
2. masonry wall wall antiknock ruggedized construction according to claim 1, it is characterised in that the frame of the fixed frame
Screw rod is provided with, the edge of the steel fabric sheet is provided with the draw ring being connected with the screw rod.
3. masonry wall wall antiknock ruggedized construction according to claim 2, it is characterised in that the steel fabric sheet is high-strength
Steel strand wires mesh sheet.
4. masonry wall wall antiknock ruggedized construction according to claim 3, it is characterised in that be coated on the steel fabric sheet
It is 25-35mm with the mortar thickness on reinforcement.
5. the masonry wall wall antiknock ruggedized construction according to claim any one of 1-4, it is characterised in that the mortar bag
Include binder materials, water, rubber powder, water reducer and sand, the binder materials, water, rubber powder, the ratio of water reducer and sand are 1000：220
~240：10~30：5~7：1500~2500.
6. masonry wall wall antiknock ruggedized construction according to claim 5, it is characterised in that the binder materials includes water
Mud, silicon ash and flyash, the ratio of the cement, silicon ash and flyash is 20：2~3：2~3.
7. masonry wall wall antiknock ruggedized construction according to claim 5, it is characterised in that be coated with wall on the mortar
Face surface layer.
8. masonry wall wall antiknock ruggedized construction according to claim 5, it is characterised in that the frame of the fixed frame
It is made by angle steel.
9. masonry wall wall antiknock ruggedized construction according to claim 8, it is characterised in that the angle steel passes through chemical spiral shell
Bolt is fixed on the surface of the wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305862.9A CN107060364B (en) | 2017-05-03 | 2017-05-03 | A kind of masonry wall wall antiknock ruggedized construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305862.9A CN107060364B (en) | 2017-05-03 | 2017-05-03 | A kind of masonry wall wall antiknock ruggedized construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107060364A true CN107060364A (en) | 2017-08-18 |
| CN107060364B CN107060364B (en) | 2019-06-28 |
Family
ID=59596510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710305862.9A Withdrawn - After Issue CN107060364B (en) | 2017-05-03 | 2017-05-03 | A kind of masonry wall wall antiknock ruggedized construction |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476461A (en) * | 2017-08-30 | 2017-12-15 | 贵州精正检测有限公司 | Frame structure and aseismic wall |
| CN108661345A (en) * | 2018-06-21 | 2018-10-16 | 陕西理工大学 | A kind of the masonry house wall body structure and its construction method of the reinforcing of bilayer strap |
| CN108894694A (en) * | 2018-06-01 | 2018-11-27 | 东南大学 | A kind of antiknock window arrangement and its construction method |
| CN114876235A (en) * | 2022-06-09 | 2022-08-09 | 河北金铎建设工程有限公司 | Method for reinforcing masonry wall by using steel wire mesh rope-polymer mortar bed |
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| CN1566554A (en) * | 2003-06-18 | 2005-01-19 | 张英保 | Outer heat preservation construction structure for external wall |
| CN201792864U (en) * | 2010-07-23 | 2011-04-13 | 魏玮 | Steel traction tightener |
| CN104790681A (en) * | 2015-03-31 | 2015-07-22 | 华南理工大学建筑设计研究院 | Device for preventing wall out-of-plane unstability from causing collapse of building of masonry structure in earthquake |
| CN105019697A (en) * | 2015-08-11 | 2015-11-04 | 哈尔滨东专科技有限公司 | Wall type financial cashbox |
| CN106013502A (en) * | 2016-06-21 | 2016-10-12 | 沈阳建筑大学 | Detachable hanging plate type blast wall |
-
2017
- 2017-05-03 CN CN201710305862.9A patent/CN107060364B/en not_active Withdrawn - After Issue
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566554A (en) * | 2003-06-18 | 2005-01-19 | 张英保 | Outer heat preservation construction structure for external wall |
| CN201792864U (en) * | 2010-07-23 | 2011-04-13 | 魏玮 | Steel traction tightener |
| CN104790681A (en) * | 2015-03-31 | 2015-07-22 | 华南理工大学建筑设计研究院 | Device for preventing wall out-of-plane unstability from causing collapse of building of masonry structure in earthquake |
| CN105019697A (en) * | 2015-08-11 | 2015-11-04 | 哈尔滨东专科技有限公司 | Wall type financial cashbox |
| CN106013502A (en) * | 2016-06-21 | 2016-10-12 | 沈阳建筑大学 | Detachable hanging plate type blast wall |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476461A (en) * | 2017-08-30 | 2017-12-15 | 贵州精正检测有限公司 | Frame structure and aseismic wall |
| CN107476461B (en) * | 2017-08-30 | 2020-07-17 | 首钢水城钢铁(集团)赛德建设有限公司 | Frame structure and shockproof wall |
| CN108894694A (en) * | 2018-06-01 | 2018-11-27 | 东南大学 | A kind of antiknock window arrangement and its construction method |
| CN108661345A (en) * | 2018-06-21 | 2018-10-16 | 陕西理工大学 | A kind of the masonry house wall body structure and its construction method of the reinforcing of bilayer strap |
| CN114876235A (en) * | 2022-06-09 | 2022-08-09 | 河北金铎建设工程有限公司 | Method for reinforcing masonry wall by using steel wire mesh rope-polymer mortar bed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107060364B (en) | 2019-06-28 |
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