CN114016742A - Self-moving type concrete pouring device for steel tube bundle shear wall - Google Patents
Self-moving type concrete pouring device for steel tube bundle shear wall Download PDFInfo
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- CN114016742A CN114016742A CN202111316076.1A CN202111316076A CN114016742A CN 114016742 A CN114016742 A CN 114016742A CN 202111316076 A CN202111316076 A CN 202111316076A CN 114016742 A CN114016742 A CN 114016742A
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- shear wall
- tube bundle
- steel tube
- bundle shear
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 239000004567 concrete Substances 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 238000007599 discharging Methods 0.000 claims description 27
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 9
- 239000011150 reinforced concrete Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention provides a self-moving type concrete pouring device for a steel tube bundle shear wall, and belongs to the field of steel tube bundle shear wall pouring equipment. The steel tube bundle shear wall pouring device is arranged on a steel tube bundle shear wall and comprises a first pouring mechanism and a second pouring mechanism, wherein the first pouring mechanism and the second pouring mechanism are both in sliding connection with the steel tube bundle shear wall. Compared with the prior art, the automatic concrete feeding device has the characteristics of automatically moving on a wall body and flexibly controlling feeding, and the feeding bin has high flexibility and is convenient for independently controlling concrete to feed in a plurality of cavities.
Description
Technical Field
The invention belongs to the field of steel tube bundle shear wall pouring equipment, and particularly relates to a self-moving type concrete pouring device for a steel tube bundle shear wall.
Background
The shear wall is also called as a wind-resistant wall, an earthquake-resistant wall or a structural wall, is a wall body which mainly bears horizontal load and vertical load (gravity) caused by wind load or earthquake action in a house or a structure, and can effectively prevent the house or the structure of the structure from being damaged by shearing. The shear wall is generally made of reinforced concrete and is divided into a plane shear wall and a barrel shear wall, wherein the plane shear wall is used in a reinforced concrete frame structure, a riser structure and a flat slab system, and the reinforced concrete shear wall can be cast in place or prefabricated at certain parts in order to increase the rigidity, strength and collapse resistance of the structure; the cylinder shear wall is used in high-rise buildings, high-rise structures and suspension structures and is surrounded by partition walls of elevator rooms, staircases, equipment and auxiliary rooms, the cylinder wall is a cast-in-place reinforced concrete wall, and the rigidity and the strength of the cylinder shear wall are higher than those of a plane shear wall in bearing higher horizontal load; the wall can be divided into a bearing wall and a shear wall according to the stress characteristics, wherein the bearing wall mainly bears vertical load, such as a masonry wall; the shear wall is mainly used for bearing horizontal load, and the horizontal load is mainly generated by the action of a horizontal earthquake in an earthquake-proof defense area, so the shear wall is also sometimes called as an earthquake-proof wall, and can be divided into a steel plate shear wall, a reinforced concrete shear wall and a reinforced block shear wall according to structural materials, wherein the reinforced concrete shear wall is most commonly used.
The traditional steel tube bundle shear wall has the defects that concrete is easy to drop, a pouring device is inconvenient to automatically walk on the steel tube bundle shear wall and is not high in flexibility when being put into a storage bin in a pouring process, and Chinese patent with the patent number of CN201820931172.4 discloses a self-moving type concrete pouring device for the steel tube bundle shear wall. Above-mentioned equipment has improved the quality of pouring of steel-pipe bundle shear force wall concrete, has effectively improved the efficiency of construction moreover, nevertheless adopts above-mentioned device to pour when, needs the manual control picture peg to control the size of pouring the mouth usually, and then the control speed of pouring, and the unloading speed is pour to the above-mentioned mode of pouring of being not convenient for control, and the independent control concrete of also being convenient for carries out the unloading at a plurality of cavitys. In view of the above, the invention provides a self-moving concrete pouring device for a steel tube bundle shear wall.
Disclosure of Invention
In order to solve the problems, the invention provides a self-moving type concrete pouring device for a steel tube bundle shear wall, which has the characteristics of automatically moving on the wall body and flexibly controlling the blanking, and the blanking bin has high flexibility and is convenient for independently controlling the blanking of concrete in a plurality of cavities.
The invention is realized by the following technical scheme:
the self-moving type concrete pouring device for the steel tube bundle shear wall is installed on the steel tube bundle shear wall and comprises a first pouring mechanism and a second pouring mechanism, wherein the first pouring mechanism and the second pouring mechanism are both in sliding connection with the steel tube bundle shear wall.
As a preferable technical solution, the first pouring mechanism is provided with two or more than two.
As a preferable technical solution, two first pouring mechanisms are provided.
As an optimal technical scheme, the two first pouring mechanisms comprise first slide rails, first slide blocks, support frames and first blanking bins, the first slide rails are fixed on the outer sides of the steel pipe bundle shear walls through bolts, the first slide blocks are connected with the first slide rails in a sliding mode, one ends of the support frames are fixedly connected with the first slide blocks, the other ends of the support frames are fixedly connected with the lower ends of the first blanking bins, the first slide rails are electric slide rails, and more than three blanking ports are formed in the first blanking bins.
As a preferable technical scheme, a pull rod is further arranged on the side of the first blanking bin.
As an optimal technical scheme, a steel plate used for controlling the discharging speed of the blanking port is further arranged on the blanking port, and the steel plate is movably connected with the blanking port.
As a preferable technical scheme, a pulley which is convenient for the first blanking bin to move on the steel tube bundle shear wall is further arranged at the bottom of the first blanking bin.
As a preferred technical scheme, the second pouring mechanism comprises a stabilizing frame, a motor, a screw rod, a supporting rod, a sliding rod, a second blanking bin, a second sliding block and a second sliding rail, the stabilizing frame and the second sliding rail are fixed on two sides of the steel pipe bundle shear wall through bolts, the screw rod is rotatably connected with the stabilizing frame, the motor is fixed on the stabilizing frame and fixedly connected with the screw rod, the second sliding block is in threaded connection with the screw rod, one end of the supporting rod is connected with the second sliding block, the other end of the supporting rod is connected with the lower end of the second blanking bin, one end of the sliding rod is connected with the second blanking bin, the other end of the sliding rod is connected with the second sliding rail in a sliding manner, a blanking tube is arranged at the bottom of the second blanking bin, and a control valve is arranged on the blanking tube.
As a preferred technical scheme, a connecting column is further arranged below the second sliding block, and the connecting column is in sliding connection with the stabilizing frame.
As an optimal technical scheme, a hanging lug is further arranged on the side of the second discharging bin, a hook is detachably connected onto the hanging lug, and the hook is connected with external hoisting equipment through a traction rope.
Has the advantages that:
1. according to the invention, the first pouring mechanism, the second pouring mechanism and the steel pipe bundle shear wall are in sliding connection, and due to the existence of the first pouring mechanism and the second pouring mechanism, the first pouring mechanism or the second pouring mechanism can be conveniently and independently utilized to control concrete to be fed in a plurality of cavities;
2. the first mechanism of pouring adopts the first feed bin of electronic slide rail control to remove about, the unloading speed of feed opening is controlled through the steel sheet, the feed opening is less than the width of steel-pipe bundle shear force wall, and the second is pour the mechanism and adopts motor and lead screw as the power source, control second feed bin and remove about, the unloading speed of unloading pipe is controlled through the control valve, the unloading pipe is less than the width of steel-pipe bundle shear force wall, thereby it is convenient to realize that the concrete is difficult for dropping and the automatic walking of feed bin on the steel-pipe bundle shear force wall is down realized to this, the independent control of being convenient for pours unloading speed, reach automatic movement's effect, the feed bin flexibility is higher down.
Drawings
FIG. 1 is a schematic structural diagram of a self-moving concrete pouring device for a steel tube bundle shear wall;
FIG. 2 is a left side view of the first blanking mechanism of FIG. 1;
FIG. 3 is a right side view of the second blanking mechanism of FIG. 1;
fig. 4 is an enlarged view of a portion a of fig. 1.
The attached drawings are as follows:
1. a steel tube bundle shear wall; 102. a first slide rail; 103. a first slider; 2. a first pouring mechanism; 201. a support frame; 202. a first discharging bin; 203. a pull rod; 204. a pulley; 205. a steel plate; 3. a second pouring mechanism; 301. a second discharging bin; 302. hanging a lug; 303. hooking; 304. a hauling rope; 305. externally connecting lifting equipment; 306. a discharging pipe; 307. a control valve; 308. a support bar; 309. a second slider; 310. connecting columns; 311. a screw rod; 312. a motor; 313. a stabilizing frame; 314. a slide bar; 315. a second slide rail.
Detailed Description
In order to further disclose and explain the technical scheme of the invention, the following clearly and completely describes the self-moving concrete pouring device for the steel tube bundle shear wall with reference to the attached drawings.
It should be noted that the terms "in", "middle" and "an" are used herein for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship may be made without substantial technical changes, and they are to be regarded as the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Example (b):
referring to fig. 1 to 4, the invention provides a self-moving concrete pouring device for a steel tube bundle shear wall, which is installed on a steel tube bundle shear wall 1 and comprises a first pouring mechanism 2 and a second pouring mechanism 3, wherein the first pouring mechanism 2 and the second pouring mechanism 3 are both connected with the steel tube bundle shear wall 1 in a sliding manner.
During operation, the first pouring mechanism 2, the second pouring mechanism 3 and the steel pipe bundle shear wall 1 are in sliding connection, and due to the existence of the first pouring mechanism 2 and the second pouring mechanism 3, the first pouring mechanism 2 or the second pouring mechanism 3 can be conveniently and independently utilized to control concrete to be discharged in a plurality of cavities.
Specifically, the number of the first casting mechanisms 2 is two or more, and in this embodiment, the number of the first casting mechanisms 2 is two, it should be noted that the number of the first casting mechanisms 2 may be determined according to the specific length of the wall, so as to achieve the effect that a plurality of mechanisms work simultaneously.
Specifically, the two first casting mechanisms 2 include a first slide rail 102, a first slide block 103, a support frame 201 and a first blanking bin 202, the first slide rail 102 is fixed to the outer side of the steel tube bundle shear wall 1 through bolts, the first slide block 103 is connected to the first slide rail 102 in a sliding manner, one end of the support frame 201 is fixedly connected to the first slide block 103, the other end of the support frame is fixedly connected to the lower end of the first blanking bin 202, the first slide rail 102 is an electric slide rail, and more than three blanking ports are formed in the first blanking bin 202.
During operation, power is provided through the first slide rail 102 serving as an electric slide rail, so that the first slide block 103 can slide left and right in the first slide rail 102, the first lower bin 202 connected to the first slide block 103 through the support frame 201 is driven to slide left and right on the steel pipe bundle shear wall 1, and pouring is performed through the discharge opening during the sliding process.
Specifically, a pull rod 203 is further disposed on the side of the first lower bin 202.
Specifically, still be provided with steel sheet 205 that is used for controlling feed opening speed of unloading on the feed opening, steel sheet 205 with feed opening swing joint, through steel sheet 205 and feed opening swing joint's form, the control of unloading speed is realized in the cooperation of accessible steel sheet 205 and feed opening, and steel sheet 205 can shelter from the feed opening at swing joint in-process to this opens the speed of controlling the actual unloading of feed opening.
Specifically, the bottom of the first blanking bin 202 is further provided with a pulley 204 which facilitates the movement of the first blanking bin 202 on the steel pipe bundle shear wall 1, and the first blanking bin 202 can move more smoothly left and right on the steel pipe bundle shear wall 1 under the action of the pulley 204.
Specifically, the second pouring mechanism 3 comprises a stabilizing frame 313, a motor 312, a screw 311, a supporting rod 308, a sliding rod 314, a second discharging bin 301, a second sliding block 309 and a second sliding rail 315, the stabilizing frame 313 and the second slide rail 315 are fixed to two sides of the steel tube bundle shear wall 1 through bolts, the screw 311 is rotatably connected with the stable frame 313, the motor 312 is fixed on the stable frame 313 and is fixedly connected with the screw 311, the second sliding block 309 is in threaded connection with the screw rod 311, one end of the supporting rod 308 is connected with the second sliding block 309, the other end is connected with the lower end of the second blanking bin 301, one end of the sliding rod 314 is connected with the second discharging bin 301, the other end is connected with the second sliding rail 315 in a sliding manner, a discharging pipe 306 is arranged at the bottom of the second discharging bin 301, and a control valve 307 is arranged on the discharging pipe 306.
During operation, start through motor 312 and drive lead screw 311 and rotate, and second slider 309 and lead screw 311 threaded connection, rotate in-process second slider 309 and remove about lead screw 311, and then drive and control about the second feed bin 301 of connecting on second slider 309 through bracing piece 308, and second slide rail 315 passes through the bolt fastening in wall body side, convenient to detach, feed bin 301 passes through slide bar 314 and second slide rail 315 sliding connection in one side of second slide rail 315 under the second, so that second feed bin 301 can lead at the removal in-process, remove more smoothly about.
Specifically, a connecting column 310 is further disposed below the second slider 309, the connecting column 310 is slidably connected to the stabilizing frame 313, and the second slider 309 can be guided by the connecting column 310, so that the sliding is smoother.
Specifically, feed bin 301's side still is provided with hangers 302 under the second, can dismantle on the hangers 302 and be connected with couple 303, couple 303 is connected with external lifting device 305 through haulage rope 304, when finishing when the second feed bin, loosens second slide rail 315 and the bolt of firm frame 313 from the wall body, can take off equipment through external lifting device 305, accomplishes the operation.
According to the invention, the first pouring mechanism 2 controls the first discharging bin 202 to move left and right by adopting an electric sliding rail, the discharging speed of the discharging port is controlled by the steel plate 205, the discharging port is smaller than the width of the steel pipe bundle shear wall 1, the second pouring mechanism 3 controls the second discharging bin 301 to move left and right by adopting the motor 312 and the screw rod 311 as power sources, the discharging speed of the discharging pipe 306 is controlled by the control valve 307, and the discharging pipe 306 is smaller than the width of the steel pipe bundle shear wall 1, so that the purposes that concrete is not easy to fall off and the discharging bin automatically and conveniently walks on the steel pipe bundle shear wall 1 are realized, the pouring and discharging speed is conveniently and independently controlled, the effect of automatic movement is achieved, and the flexibility of the discharging bin is higher.
The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are included if they do not depart from the spirit and scope of the present invention, and they are within the scope of the claims and the equivalent technology of the present invention.
Claims (10)
1. The utility model provides a steel-pipe bundle shear force wall is with from moving formula concrete placement device, installs on the steel-pipe bundle shear force wall, its characterized in that: the steel tube bundle shear wall comprises a first pouring mechanism and a second pouring mechanism, wherein the first pouring mechanism and the second pouring mechanism are both in sliding connection with the steel tube bundle shear wall.
2. The self-moving concrete casting device for the steel tube bundle shear wall according to claim 1, characterized in that: the first pouring mechanism is provided with more than two.
3. The self-moving concrete casting device for the steel tube bundle shear wall according to claim 2, characterized in that: the first pouring mechanism is provided with two.
4. The self-moving concrete pouring device for the steel tube bundle shear wall according to claim 3, characterized in that: the first pouring mechanism comprises a first slide rail, a first slide block, a support frame and a first blanking bin, the first slide rail is fixed on the outer side of the steel pipe bundle shear wall through bolts, the first slide block is connected with the first slide rail in a sliding mode, one end of the support frame is fixedly connected with the first slide block, the other end of the support frame is fixedly connected with the lower end of the first blanking bin, the first slide rail is an electric slide rail, and more than three blanking ports are formed in the first blanking bin.
5. The self-moving concrete pouring device for the steel tube bundle shear wall according to claim 4, characterized in that: and a pull rod is also arranged on the side of the first lower storage bin.
6. The self-moving concrete pouring device for the steel tube bundle shear wall according to claim 4, characterized in that: still be provided with the steel sheet that is used for controlling feed opening speed of unloading on the feed opening, the steel sheet with feed opening swing joint.
7. The self-moving concrete pouring device for the steel tube bundle shear wall according to claim 4, characterized in that: and the bottom of the first blanking bin is also provided with a pulley which is convenient for the first blanking bin to move on the steel pipe bundle shear wall.
8. The self-moving concrete casting device for the steel tube bundle shear wall according to claim 1, characterized in that: the second pouring mechanism comprises a stabilizing frame, a motor, a screw rod, a supporting rod, a sliding rod, a second discharging bin, a second sliding block and a second sliding rail, the stabilizing frame and the second sliding rail are fixed on two sides of the steel pipe bundle shear wall through bolts, the screw rod is rotatably connected with the stabilizing frame, the motor is fixed on the stabilizing frame and fixedly connected with the screw rod, the second sliding block is in threaded connection with the screw rod, one end of the supporting rod is connected with the second sliding block, the other end of the supporting rod is connected with the lower end of the second discharging bin, one end of the sliding rod is connected with the second discharging bin, the other end of the sliding rod is slidably connected with the second sliding rail, a discharging pipe is arranged at the bottom of the second discharging bin, and a control valve is arranged on the discharging pipe.
9. The self-moving concrete casting device for the steel tube bundle shear wall according to claim 8, wherein: a connecting column is further arranged below the second sliding block and is in sliding connection with the stabilizing frame.
10. The self-moving concrete casting device for the steel tube bundle shear wall according to claim 8, wherein: the side of feed bin still is provided with the hangers under the second, can dismantle on the hangers and be connected with the couple, the couple is connected with external equipment of lifting through the haulage rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111316076.1A CN114016742A (en) | 2021-11-08 | 2021-11-08 | Self-moving type concrete pouring device for steel tube bundle shear wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111316076.1A CN114016742A (en) | 2021-11-08 | 2021-11-08 | Self-moving type concrete pouring device for steel tube bundle shear wall |
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| Publication Number | Publication Date |
|---|---|
| CN114016742A true CN114016742A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111316076.1A Pending CN114016742A (en) | 2021-11-08 | 2021-11-08 | Self-moving type concrete pouring device for steel tube bundle shear wall |
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| CN (1) | CN114016742A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4253810A (en) * | 1980-01-21 | 1981-03-03 | Bezhanov Tigran V | Concrete placing apparatus for casting solid walls |
| CN207974534U (en) * | 2018-03-20 | 2018-10-16 | 苏诗合 | A kind of integration of metope foamed concrete pours device |
| CN208329634U (en) * | 2018-06-15 | 2019-01-04 | 大同泰瑞集团建设有限公司 | A kind of steel pipe bundle shear wall automatic moving type concrete casting device |
| CN209891732U (en) * | 2019-04-15 | 2020-01-03 | 歌山建设集团有限公司 | Multifunctional concrete pouring hopper for building construction |
| CN110939273A (en) * | 2019-12-20 | 2020-03-31 | 中国水利水电第六工程局有限公司 | A auxiliary device that puts in storage for archaize building backing plate concrete placement |
| CN210460004U (en) * | 2019-08-05 | 2020-05-05 | 中电建十一局工程有限公司 | Consolidate and concrete platform of pouring based on anticollision wall template supports |
| CN213774460U (en) * | 2020-08-31 | 2021-07-23 | 浙江世润建创科技发展有限公司 | Light steel keel paper surface gypsum board partition wall ridge |
-
2021
- 2021-11-08 CN CN202111316076.1A patent/CN114016742A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4253810A (en) * | 1980-01-21 | 1981-03-03 | Bezhanov Tigran V | Concrete placing apparatus for casting solid walls |
| CN207974534U (en) * | 2018-03-20 | 2018-10-16 | 苏诗合 | A kind of integration of metope foamed concrete pours device |
| CN208329634U (en) * | 2018-06-15 | 2019-01-04 | 大同泰瑞集团建设有限公司 | A kind of steel pipe bundle shear wall automatic moving type concrete casting device |
| CN209891732U (en) * | 2019-04-15 | 2020-01-03 | 歌山建设集团有限公司 | Multifunctional concrete pouring hopper for building construction |
| CN210460004U (en) * | 2019-08-05 | 2020-05-05 | 中电建十一局工程有限公司 | Consolidate and concrete platform of pouring based on anticollision wall template supports |
| CN110939273A (en) * | 2019-12-20 | 2020-03-31 | 中国水利水电第六工程局有限公司 | A auxiliary device that puts in storage for archaize building backing plate concrete placement |
| CN213774460U (en) * | 2020-08-31 | 2021-07-23 | 浙江世润建创科技发展有限公司 | Light steel keel paper surface gypsum board partition wall ridge |
Non-Patent Citations (1)
| Title |
|---|
| 朱维益: "《混凝土工第4版》", 30 November 1991 * |
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Application publication date: 20220208 |