CN102287057B - Construction method of large-span brick flat arch - Google Patents
Construction method of large-span brick flat arch Download PDFInfo
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- CN102287057B CN102287057B CN201110136160A CN201110136160A CN102287057B CN 102287057 B CN102287057 B CN 102287057B CN 201110136160 A CN201110136160 A CN 201110136160A CN 201110136160 A CN201110136160 A CN 201110136160A CN 102287057 B CN102287057 B CN 102287057B
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Abstract
The invention discloses a construction method of a large-span brick flat arch. The flat arch is characterized in that urea resin foam materials in cavities and inner axillary walls are arranged at the inner side of a lintel above the door and window; a concrete lintel is arranged below the urea resin foam materials in cavities and the inner axillary walls; and a brick flat arch is arranged at theouter side of the concrete lintel. The construction method is characterized in that the span of the brick flat arch is 2800mm; and the building method of the brick flat arch comprises seven procedures as follows: building a whole dry wall, manufacturing L-shaped perforated bricks, manufacturing a flat arch tyre plate, arching the flat arch, building the brick flat arch, installing additional hanging reinforcement and pouring the concrete lintel, wherein the diameters of reinforcement and the hanging reinforcement are respectively 10-20mm and 8-20mm. The construction method has the following beneficial effects: the problem that brick building construction of the flat arch with span being 2800mm can not be implemented in the prior art is solved, and the visual effect of the exterior eave dry wall is achieved; and the loading capacity of the flat arch lintel is greatly improved by additionally using the through-brick reinforcement with diameter being 12mm and the hanging reinforcement with diameter being 8mm, so that the built large-span flat arch structure has safety and the service life of the flat arch structure is ensured.
Description
Technical field
The present invention relates to a kind of brick jack arch job practices, relate in particular to a kind of job practices of brick large span jack arch, belong to the masonry structure field of engineering technology.
Background technology
Brick jack arch is exactly the brick jack arch lintel that is used on the door and window hole, usually is called for short jack arch.The purpose of brick jack arch is set, is to make brick jack arch bear the load that the above masonry of door and window end face is conducted oneself with dignity and the upper strata floor transmits, and load is passed to the masonry of door and window both sides in order to avoid damage doorframe and window frame by pressure.Brick jack arch is widely used in that load is light, span is no more than on the door and window hole of 1.2m in the prior art, generally is to be built by the common brick side to form that brick is that odd number and symmetry therefrom tilt on the mind-set both sides.
Brick jack arch has the reinforcing bar of saving and cement, the advantage that cost is low.During with traditional construction way, the span of brick jack arch generally is no more than 1.2 meters.
No. one institute in road, Tai'an, Tianjin City, China and No. four institute's engineerings; Be apartment with hotel-styled services; Ground nine layers, B1, overall floorage is respectively 65000 ㎡ and 99000 ㎡, and the typical floor floor height is 3.75 meters; Engineering exterior wall dry wall adopts shale porous brick and shale solid brick group block, and (be of a size of 240 * 120 * 53mm, the armpit wall adopts hollow shale brick to build by laying bricks or stones within the walls outward.That the span design of the brick jack arch of the outer eaves door and window hole of engineering is maximum is 2800mm, adopts conventional method can't build span by laying bricks or stones and reaches the 2800mm jack arch, also just can't embody the impression effect of dry wall brick flat arch.
The brick span of how constructing does
2800mmJack arch is the problem that the building construction technology personnel need to be resolved hurrily; Guaranteeing the safe handling of brick jack arch, also is the problem that the building construction technology personnel are paid close attention to.
Summary of the invention
The object of the invention; Aim to provide a kind of job practices of brick large span jack arch; This method has solved the construction difficult problem that traditional handicraft can't realize building by laying bricks or stones span 2800mm jack arch, uses jack arch that method of the present invention is laid bricks to have safety of structure, thereby has guaranteed its application life.
For realizing the object of the invention, the technical scheme that is adopted is:
1, a kind of job practices of brick large span jack arch comprises that the formation of jack arch part assembled wall, jack arch mainly play the beam effect of crossing of door and window top; Because of the appearance that to build outer eaves requirement be dry wall, so wall external layer is used brick flat arch, the inboard concrete lintel of using; The dry wall exterior wall is designed to one brick wall, and its Thickness Design is 120mm, the interior armpit wall of design; Its Thickness Design is 200mm, is the cavity of 60mm between one brick wall and the interior armpit wall, treats that adopting the urea-formaldehyde resin foaming material to fill at empty cavity position after body of wall is accomplished irritates real; Form to have and irritate the lintel form of structure of filling out pollopas expanded material interlayer, attach the sealing of frame installation and cavity in order to guarantee door and window, door and window hole both sides cavity and interior armpit wall place are designed with the constructional column of sectional dimension 260mm * 200mm; And directly be connected with outer eaves dry wall, the outside, original Vierendeel girder place is next step the brick jack arch that will construct above door and window, the inboard is interior armpit wall; The urea-formaldehyde resin foaming material is filled in the centre position; Urea-formaldehyde resin foaming material and interior armpit wall are next step concrete lintel that will pour into a mould (5) down, and the concrete lintel outside is brick jack arch, and it is characterized in that: the span of said brick jack arch is 2800 mm; Span is that 2800 mm jack arch are arranged on the outside, original Vierendeel girder place, door and window top, and its building construction method is built by laying bricks or stones by 1. whole dry wall; 2. the making of the complicated-shape porous brick of " L " shape; 3. jack arch tire plate is made; 4. the arch camber of jack arch; 5. additional installation of hanging muscle; 6. build brick flat arch and 7. concreting lintel by laying bricks or stones, totally 7 procedures are formed, and each process operations is specific as follows:
1. whole dry wall is built by laying bricks or stones
Whole dry wall is built the selection standard porous brick by laying bricks or stones, builds by laying bricks or stones with prior art, and dry wall is built by laying bricks or stones and selected corner angle neat; There are not crooked, crackle, color even, the standard porous brick of specification basically identical; Its nominal size, length C are 240mm, and width K is 120mm; Thickness is 53mm, and whole dry wall is temporarily built jack arch hypodermis height by laying bricks or stones, and remainder and brick jack arch are built by laying bricks or stones together;
2. the making of the complicated-shape porous brick of " L " shape;
Selecting length C for use is 240mm; Width K is 120mm, and thickness is that the standard porous brick of 53mm carries out cutting process, cuts out L-shaped complicated-shape porous brick; The length C 1 and the K2 of the complicated-shape porous brick of " L " shape; Be respectively 240mm and 50mm, top width K1 is 60mm, and the complicated-shape porous brick of " L " shape is so that organize the block jack arch and make the jack arch inboard present the effect of wrong raft with the standard porous brick;
3. the making of jack arch tire plate
Jack arch tire plate is propped up at the door and window hole place, and the width of jack arch tire plate equates with the assembled wall wall thickness, and the concrete lintel bed die that next step will be built is paid in the lump;
4. the arch camber of jack arch
Loose tool Zhi Haohou, elder generation is one deck damp sand on jack arch loose tool template upper berth, and the mid portion thickness of damp sand is that 20mm, two-end thickness are 5mm, and as the arch camber of jack arch, the purpose of arch camber is to make its bottom surface concordant after the stressed sinking of jack arch;
5. additional installation of hanging muscle
Next group of every 500mm place's perforating bolt that rises on the original Vierendeel girder above the door and window mouth, to hang muscle subsequent use in welding on the bolt that rises, and one group is 2, and 2 spacings of hanging muscle are a brick;
6. build brick flat arch by laying bricks or stones;
Alternately drape over one's shoulders ash successively by a side direction opposite side with a standard porous brick and the complicated-shape porous brick of " L " shape and build group block jack arch by laying bricks or stones, the jack arch inboard is wrong raft shape; When building brick flat arch by laying bricks or stones, pass the hole of jack arch with reinforcing bar, reinforcing bar will be inserted into 200mm in the dry wall of jack arch both sides, reinforcing bar exposes at the wrong Cha Chu of the complicated-shape porous brick of jack arch " L " shape, in order to original Vierendeel girder on the muscle that hangs installed be connected;
7. concreting lintel
Treat jack arch build by laying bricks or stones finish after; Begin to build the lintel concrete, make the concrete wrong raft abundant interlock inboard, reserved steel bar is wrapped up in it with building jack arch by laying bricks or stones; Construction finishes; Build the same wall surface levelling in the jack arch outside by laying bricks or stones, so far having accomplished span is the construction of the jack arch of 2800mm, and brick span has the impression effect of dry wall for the 2800mm jack arch.
Said reinforcing bar, its diameter range are φ 10mm～φ 20 mm.
The said muscle that hangs, its diameter range are φ 8mm～φ 20 mm.
The beneficial effect that the present invention has
1, solves prior art and can't implement the brick construction difficult problem that span is the 2800mm jack arch, and realized the impression effect of outer eaves dry wall.
2, the use that adds through wearing the brick reinforcing bar and hanging muscle; Strengthened the bearing capacity of brick flat arch lintel greatly; Make the large span jack arch structure of building by laying bricks or stones have safety; Guaranteed its application life, just relied on the extrusion friction power of brick body that it is fixed merely and have the problem of poor safety performance thereby overcome the prior art jack arch.
Description of drawings
Fig. 1 is the contour structures sketch map of the standard porous brick of the brick jack arch of the present invention;
Fig. 2 is the contour structures sketch map of the complicated-shape porous brick of the brick jack arch of the present invention " L " shape;
Fig. 3 be the present invention when building brick flat arch by laying bricks or stones, pass the reinforcing bar view at the standard porous brick place in the jack arch;
Fig. 4 be the present invention when building brick flat arch by laying bricks or stones, pass the reinforcing bar view at the complicated-shape porous brick of " L " shape place in the jack arch;
Fig. 5 is that the present invention hangs muscle and wears brick with reinforcing bar and be connected sketch map;
Fig. 6 is the brick 2800mm jack arch of a present invention impression effect sketch map.
Among Fig. 1: 1-standard porous brick.
Among Fig. 2: the complicated-shape porous brick of 2-" L " shape.
Among Fig. 3: 1-standard porous brick; The original Vierendeel girder of 3-; 4-thickness is the interior armpit wall of 200mm; The 5-concrete lintel; 6-jack arch tire plate; The 8-reinforcing bar; Irritate in the 60mm cavity between 9-one brick wall and the interior armpit wall, cavity and fill out the pollopas expanded material; 10--hangs muscle; The 11-bolt that rises.
Among Fig. 4: the complicated-shape porous brick of 2-" L " shape; The original Vierendeel girder of 3-; 4-thickness is the interior armpit wall of 200mm; The 5-concrete lintel; 6-jack arch tire plate; 8-φ 12mm reinforcing bar; Irritate in the 60mm cavity between 9-one brick wall and the interior armpit wall, cavity and fill out the pollopas expanded material; 10--hangs muscle; The 11-bolt that rises.
Among Fig. 5: 1-standard porous brick; The complicated-shape porous brick of 2-" L " shape; The 5-concrete lintel; The 8-reinforcing bar; 10-hangs muscle; The 12-span is the 2800mm jack arch.
Among Fig. 6: the 12-span is the 2800mm jack arch; 13 dry walls.
The specific embodiment
Specify the specific embodiment of the present invention below in conjunction with accompanying drawing and preferred embodiment.
Embodiment
A kind of job practices of brick large span jack arch comprises that the formation of jack arch part assembled wall, jack arch mainly play the beam effect of crossing of door and window top; Because of the appearance that to build outer eaves requirement be dry wall, so wall external layer is used brick flat arch, the inboard concrete lintel of using; The dry wall exterior wall is designed to one brick wall, and its Thickness Design is 120mm, the interior armpit wall 4 of design; Its Thickness Design is 200mm, is the cavity of 60mm between one brick wall and the interior armpit wall 4, treats that adopting urea-formaldehyde resin foaming material 9 to fill at empty cavity position after body of wall is accomplished irritates real; Form to have and irritate the lintel form of structure of filling out pollopas expanded material 9 interlayers, attach the sealing of frame installation and cavity in order to guarantee door and window, door and window hole both sides cavity and interior armpit wall 4 places are designed with the constructional column of sectional dimension 260mm * 200mm; And directly be connected with outer eaves dry wall, the outside, original Vierendeel girder 3 places is next step the brick jack arch that will construct above door and window, the inboard is interior armpit wall 4; Urea-formaldehyde resin foaming material 9 is filled in the centre position; Urea-formaldehyde resin foaming material 9 is next step concrete lintel that will pour into a mould 54 times with interior armpit wall, and concrete lintel 5 outsides are brick jack arch, it is characterized in that: the span of said brick jack arch is 2800 mm; Span is that 2800 mm jack arch 12 are arranged on the outside, original Vierendeel girder 3 places, door and window top, and its building construction method is built by laying bricks or stones by 1. whole dry wall; 2. the making of the complicated-shape porous brick of " L " shape; 3. jack arch tire plate is made; 4. the arch camber of jack arch; 5. additional installation of hanging muscle; 6. build brick flat arch and 7. concreting lintel by laying bricks or stones, totally 7 procedures are formed, and each process operations is specific as follows:
1. whole dry wall is built by laying bricks or stones
Whole dry wall 13 is built the selection standard porous brick by laying bricks or stones, builds by laying bricks or stones with prior art, and dry wall 13 is built by laying bricks or stones and selected corner angle neat, does not have crooked, crackle; Color even, the standard porous brick 1 of specification basically identical, as shown in Figure 1; Its nominal size, length C are 240mm, and width K is 120mm; Thickness is 53mm, and whole dry wall 13 is temporarily built jack arch 12 hypodermis height by laying bricks or stones, and remainder and brick jack arch 12 are built by laying bricks or stones together;
2. the making of the complicated-shape porous brick of " L " shape;
Selecting length C for use is 240mm, and width K is 120mm, and thickness is that the standard porous brick of 53mm carries out cutting process; Cut out L-shaped complicated-shape porous brick 2, as shown in Figure 2, the length C 1 and the K2 of the complicated-shape porous brick 2 of " L " shape; Be respectively 240mm and 50mm; Top width K1 is 60mm, and is as shown in Figure 2, and the complicated-shape porous brick 2 of " L " shape is so that build jack arch 12 and make jack arch 12 inboards present the effect of wrong raft with 1 group of standard porous brick;
3. the making of jack arch tire plate
Jack arch tire plate 6 is propped up at the door and window hole place, and the width of jack arch tire plate 6 equates with the assembled wall wall thickness, and next step concrete lintel that will build (5) bed die is paid in the lump, like Fig. 3 and shown in Figure 4;
4. the arch camber of jack arch
Loose tool Zhi Haohou, elder generation is one deck damp sand on jack arch loose tool template upper berth, and the mid portion thickness of damp sand is that 20mm, two-end thickness are 5mm, and as the arch camber of jack arch 12, the purpose of arch camber is to make its bottom surface concordant after the jack arch 12 stressed sinkings;
5. additional installation of hanging muscle
Next group of every 500mm place's perforating bolt 11 that rises on the original Vierendeel girder 3 above the door and window mouth, to hang muscle 10 subsequent use in welding on the bolt 11 that rises, and one group is 2, and 2 spacings of hanging muscle 10 are a brick, like Fig. 3 and shown in Figure 4;
6. build brick flat arch by laying bricks or stones;
Alternately drape over one's shoulders ash successively by a side direction opposite side with a standard porous brick 1 and the complicated-shape porous brick 2 of " L " shape and build group block jack arch 12 by laying bricks or stones, jack arch 12 inboards are wrong raft shape; When building brick flat arch 12 by laying bricks or stones; Pass the hole of jack arch 12 with reinforcing bar 8, reinforcing bar 8 will be inserted into 200mm in the jack arch 12 both sides dry walls 13, and reinforcing bar 8 exposes at the wrong Cha Chu of the complicated-shape porous brick 2 of jack arch " L " shape; In order to original Vierendeel girder 3 on the muscle 10 that hangs installed be connected, as shown in Figure 5;
7. concreting lintel
Treat jack arch 12 build by laying bricks or stones finish after, begin to build the lintel concrete, make the concrete wrong raft abundant interlock inboard with building jack arch 12 by laying bricks or stones; Reserved steel bar 8 is wrapped up in it; Construction finishes, and builds the same wall surface levelling in jack arch 12 outsides by laying bricks or stones, and so far having accomplished span is the construction of the jack arch 12 of 2800mm; Brick span is the impression effect that 2800mm jack arch 12 has dry wall, and is as shown in Figure 6.
Said reinforcing bar 8, its diameter range are φ 10mm～φ 20 mm, present embodiment design φ 12mm.
The said muscle 10 that hangs, its diameter range are φ 8mm～φ 20 mm, present embodiment design φ 8mm.
Said method is applicable to that 1200mm～2800mm reaches the construction greater than the brick jack arch of 2800mm.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from design concept of the present invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (4)
1. the job practices of a brick large span jack arch comprises the formation of jack arch part assembled wall, and jack arch mainly plays the beam effect of crossing of door and window top; Because of the appearance that to build outer eaves requirement be dry wall, so wall external layer is used brick flat arch, the inboard concrete lintel of using; The dry wall exterior wall is designed to one brick wall, and its Thickness Design is 120mm, the interior armpit wall (4) of design; Its Thickness Design is 200mm, is the cavity of 60mm between one brick wall and the interior armpit wall (4), treats that adopting urea-formaldehyde resin foaming material (9) to fill at empty cavity position after body of wall is accomplished irritates real; Form to have and irritate the lintel form of structure of filling out urea-formaldehyde resin foaming material (9) interlayer; In order to guarantee that door and window attaches the sealing of frame installation and cavity, door and window hole both sides cavity and interior armpit wall (4) locate to be designed with the constructional column of sectional dimension 260mm * 200mm, and directly are connected with outer eaves dry wall; Be next step the brick jack arch that will construct outside original Vierendeel girder (3) is located above door and window; The inboard is an interior armpit wall (4), and urea-formaldehyde resin foaming material (9) is filled in the centre position, and urea-formaldehyde resin foaming material (9) and interior armpit wall (4) are next step concrete lintel that will pour into a mould (5) down; Concrete lintel (5) outside is brick jack arch; It is characterized in that: the span of said brick jack arch is 2800 mm, and span is that 2800 mm jack arch (12) are arranged on the original Vierendeel girder in door and window top (3) and locate the outside, and its building construction method is built by laying bricks or stones by 1. whole dry wall; 2. the making of the complicated-shape porous brick of " L " shape; 3. jack arch tire plate is made; 4. the arch camber of jack arch; 5. additional installation of hanging muscle; 6. build brick flat arch and 7. concreting lintel by laying bricks or stones, totally 7 procedures are formed, and each process operations is specific as follows:
1. whole dry wall is built by laying bricks or stones
Whole dry wall (13) is built the selection standard porous brick by laying bricks or stones, builds by laying bricks or stones with prior art, and dry wall (13) is built by laying bricks or stones and selected corner angle neat; There are not crooked, crackle, color even, the standard porous brick (1) of specification basically identical; Its nominal size, length (C) is 240mm, width (K) is 120mm; Thickness is 53mm, and whole dry wall (13) is temporarily built jack arch (12) hypodermis height by laying bricks or stones, and remainder and brick jack arch (12) are built by laying bricks or stones together;
2. the making of the complicated-shape porous brick of " L " shape;
Select for use length (C) to be 240mm; Width (K) is 120mm, and thickness is that the standard porous brick of 53mm carries out cutting process, cuts out L-shaped complicated-shape porous brick (2); Two edge lengths (C1 and K2) of the complicated-shape porous brick (2) of " L " shape; Be respectively 240mm and 50mm, top width (K1) is 60mm, and the complicated-shape porous brick of " L " shape (2) is so that build jack arch (12) and make jack arch (12) inboard present the effect of wrong raft with standard porous brick (1) group;
3. the making of jack arch tire plate
Jack arch tire plate (6) is propped up at the door and window hole place, and the width of jack arch tire plate (6) equates with the assembled wall wall thickness, and next step concrete lintel that will build (5) bed die is paid in the lump;
4. the arch camber of jack arch
Loose tool Zhi Haohou, elder generation is one deck damp sand on jack arch loose tool template upper berth, and the mid portion thickness of damp sand is that 20mm, two-end thickness are 5mm, and as the arch camber of jack arch (12), the purpose of arch camber is to make its bottom surface concordant after the stressed sinking of jack arch (12);
5. additional installation of hanging muscle
Next group of every 500mm place perforating that goes up original Vierendeel girder (3) above the door and window mouth bolt (11) that rises is gone up at the bolt that rises (11) and to be welded that to hang muscle (10) subsequent use, and one group is 2, and 2 spacings of hanging muscle (10) are a brick;
6. build brick flat arch by laying bricks or stones;
Alternately drape over one's shoulders ash successively by a side direction opposite side with a standard porous brick (1) with a complicated-shape porous brick of " L " shape (2) and build group block jack arch (12) by laying bricks or stones, jack arch (12) inboard is wrong raft shape; When building brick flat arch (12) by laying bricks or stones; Pass the hole of jack arch (12) with reinforcing bar (8); Reinforcing bar (8) will be inserted into the interior 200mm of jack arch (12) both sides dry walls (13); Reinforcing bar (8) exposes at the wrong Cha Chu of the complicated-shape porous brick of jack arch " L " shape (2), is connected in order to going up the muscle of installing (10) that hangs with original Vierendeel girder (3);
7. concreting lintel
Treat jack arch (12) build by laying bricks or stones finish after; Begin to build the lintel concrete, make the concrete wrong raft abundant interlock inboard, reserved steel bar (8) is wrapped up in it with building jack arch (12) by laying bricks or stones; Construction finishes; Build the same wall surface levelling in jack arch (12) outside by laying bricks or stones, so far having accomplished span is the construction of the jack arch (12) of 2800mm, and brick span is the impression effect that 2800mm jack arch (12) has dry wall.
2. according to the job practices of the said brick large span jack arch of claim 1, it is characterized in that: said reinforcing bar (8), its diameter range are φ 10mm～φ 20 mm.
3. according to the job practices of the said brick large span jack arch of claim 1, it is characterized in that: the said muscle (10) that hangs, its diameter range is φ 8mm～φ 20 mm.
4. according to the job practices of the said brick large span jack arch of claim 1, it is characterized in that: said method is applicable to that 1200mm～2800mm reaches the construction greater than the brick jack arch of 2800mm.
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| CN201110136160A CN102287057B (en) | 2011-05-24 | 2011-05-24 | Construction method of large-span brick flat arch |
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| CN102287057B true CN102287057B (en) | 2012-10-17 |
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| CN102767283B (en) * | 2012-07-27 | 2014-08-06 | 天津三建建筑工程有限公司 | Construction method of bricked large-span multiple-arc-arch |
| CN108518077A (en) * | 2018-04-25 | 2018-09-11 | 天津三建建筑工程有限公司 | Cutting brick masonry made in Great Britain embodies the construction method of historical building style combined wall |
| CN110331795B (en) * | 2019-07-25 | 2022-04-29 | 石家庄市住宅开发建设公司 | Reverse construction method for arch coupon structure |
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| CN1042208A (en) * | 1989-09-21 | 1990-05-16 | 田明安 | With outstanding arched floor and the arch floorslab block method that is built into of concrete block |
| CN2695509Y (en) * | 2004-03-03 | 2005-04-27 | 朱培立 | Round building mouldless vault |
| CN201546325U (en) * | 2009-11-05 | 2010-08-11 | 王泽飞 | Structure for assembling stone building blocks into circular roof or archway |
| CN101870872A (en) * | 2010-07-22 | 2010-10-27 | 中国一冶集团有限公司 | Method for building vault lining of flue |
| CN202090464U (en) * | 2011-05-24 | 2011-12-28 | 天津三建建筑工程有限公司 | Jack arch structure with bricking span of 2800mm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1629160A1 (en) * | 2003-05-02 | 2006-03-01 | David W. Powell | A structure and method for prefabricated construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042208A (en) * | 1989-09-21 | 1990-05-16 | 田明安 | With outstanding arched floor and the arch floorslab block method that is built into of concrete block |
| CN2695509Y (en) * | 2004-03-03 | 2005-04-27 | 朱培立 | Round building mouldless vault |
| CN201546325U (en) * | 2009-11-05 | 2010-08-11 | 王泽飞 | Structure for assembling stone building blocks into circular roof or archway |
| CN101870872A (en) * | 2010-07-22 | 2010-10-27 | 中国一冶集团有限公司 | Method for building vault lining of flue |
| CN202090464U (en) * | 2011-05-24 | 2011-12-28 | 天津三建建筑工程有限公司 | Jack arch structure with bricking span of 2800mm |
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| C06 | Publication | ||
| PB01 | Publication | ||
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