CN110306532A - A kind of linkage precast pile type underground diaphragm wall - Google Patents
A kind of linkage precast pile type underground diaphragm wall Download PDFInfo
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- CN110306532A CN110306532A CN201910605729.4A CN201910605729A CN110306532A CN 110306532 A CN110306532 A CN 110306532A CN 201910605729 A CN201910605729 A CN 201910605729A CN 110306532 A CN110306532 A CN 110306532A
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- prefabricated pile
- pile body
- linkage
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of linkage precast pile type underground diaphragm walls, including the first prefabricated pile body, the second prefabricated pile body is connected on the right side of the first prefabricated pile body, the right side opening of the first prefabricated pile body is equipped with triangle groove, it is fixedly connected with triangle convex on the left of the second prefabricated pile body, the present invention relates to Diaphragm Wall fields.The linkage precast pile type underground diaphragm wall, pass through setting triangle convex and triangle groove, so that the first prefabricated pile body and the second prefabricated pile body are laterally aligned, and pass through the first half square groove of setting, the second half square groove and rectangular reinforced frames, it can handle the gap of junction, then mounting blocks, thread groove and threaded post are utilized, it is aligned its longitudinal direction, and by forming connecting key after pouring, the first steel reinforcement cage and the second steel reinforcement cage is finally cooperated integrally to be poured, so that the junction alignment of two prefabricated piles does not generate gap, the stability of diaphram wall is enhanced.
Description
Technical field
The present invention relates to Diaphragm Wall field, specially a kind of linkage precast pile type underground diaphragm wall.
Background technique
Diaphram wall is that foundation engineering uses a kind of trench machine on the ground, along all side axis of deep excavation project
Line excavates out a long and narrow deep trouth under the conditions of mud off, after clear slot, steel reinforcement cage is hung in slot, then uses tremie method
Underwater concreting with tremie method builds up a unit groove section, so carries out paragraph by paragraph, builds up continuous reinforced concrete wall together in underground
Wall, as intercept water, antiseepage, load-bearing, water-retaining structure.Since in city, base pit engineering is often constructed in business district, not only to guarantee
Foundation pit itself stablizes safety, and to control the surface subsidence on foundation pit periphery, it is ensured that the sedimentation of surrounding formations does not interfere with week
The normal use of side building pipeline and structures.Currently used underground exterior-protected structure form has: diaphram wall, bored concrete pile,
Fashioned iron Soil-cement Wall etc., and diaphram wall is with small vibration in its construction, noise is low, the rigidity of wall is big, can be used as just
Property basis, be suitable for a variety of formation conditions the advantages that, be widely used in deep-foundation pit engineering.
Prefabricated pile just refers in piling scene or neighbouring prefabricated on the spot, existing linkage precast pile type underground diaphragm wall, greatly
It is all to throw prefabricated pile by concreting in ground, but the junction of two prefabricated piles cannot be aligned and generate gap
Problem, and offset is easy to produce when being installed, cause the stability of diaphram wall poor.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of linkage precast pile type underground diaphragm walls, solve existing
The junction of linkage precast pile type underground diaphragm wall, two prefabricated piles cannot be aligned, and offset is easy to produce when being installed,
The problem for causing diaphram wall stability poor.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of linkage precast pile underground is continuous
Wall, including the first prefabricated pile body, are connected with the second prefabricated pile body on the right side of the first prefabricated pile body, and described
The right side opening of one prefabricated pile body is equipped with triangle groove, is fixedly connected with triangle convex on the left of the second prefabricated pile body,
And the inner surface of the outer surface of triangle convex and triangle groove is clamped, the two sides of the triangle groove inner wall offer the first half
Square groove, the two sides of the triangle convex outer surface offer the second half square grooves, the first half square groove and the second half square grooves
Rectangular reinforced frame is connected between inner surface, the two sides of the first prefabricated pile bodies top offer the first circle
Slot, the inner surface of two first circular troughs are connected with the first steel reinforcement cage, and the top of first steel reinforcement cage is through the
One circular trough and the outside for extending to the first circular trough, the two sides of the second prefabricated pile bodies top offer the second circle
Slot, the inner surface of two second circular troughs are connected with the second steel reinforcement cage, and the top of second steel reinforcement cage is through the
Two circular troughs and the outside for extending to the second circular trough are embedded with mounting blocks, the peace on the right side of the first prefabricated pile body
The inside of dress block offers thread groove, and the front and rear sides of the first prefabricated pile bodies top offer mounting groove, the spiral shell
The inner surface of groove is threaded with threaded post, and one end of the threaded post through the second prefabricated pile body and extends to mounting groove
Inside.
Preferably, the quantity of the thread groove offers multiple, and thread groove is evenly distributed in the two sides of mounting blocks.
Preferably, the depth of first circular trough and the second circular trough is respectively that the first prefabricated pile body and second are prefabricated
The 2/3 of pile body.
Preferably, the shape of the threaded post is linear type or L-type.
Preferably, the front and rear sides of the first prefabricated pile body outer surface are fixedly connected to the first pre-buried steel gusset,
The first connecting plate is fixedly connected at the top of the first pre-buried steel gusset.
Preferably, the front and rear sides of the second prefabricated pile body outer surface are fixedly connected to the second pre-buried steel gusset,
The second connecting plate is fixedly connected at the top of the second pre-buried steel gusset.
Preferably, the side of first connecting plate offers the first keyway, and the side of second connecting plate offers
Second keyway, and the side of the second keyway and the side of the first keyway are in be staggeredly placed.
Preferably, the inside of the first pre-buried steel gusset and the second pre-buried steel gusset offers through-hole, and through-hole
Quantity is provided with multiple.
Preferably, the inside of the described first prefabricated pile body and the second prefabricated pile body offer it is rectangular pour slot, and
There are four the rectangular quantity settings for pouring slot.
(3) beneficial effect
The present invention provides a kind of linkage precast pile type underground diaphragm walls.Compared with prior art, have it is following the utility model has the advantages that
(1), the linkage precast pile type underground diaphragm wall, it is pre- by being connected with second on the right side of the first prefabricated pile body
Pile body processed, the right side opening of the first prefabricated pile body are equipped with triangle groove, are fixedly connected with three on the left of the second prefabricated pile body
Angle convex block, and the inner surface of the outer surface of triangle convex and triangle groove is clamped, the two sides of triangle groove inner wall offer the
Half square groove, the two sides of triangle convex outer surface offer the second half square grooves, the interior table of the first half square grooves and the second half square grooves
It is connected with rectangular reinforced frame between face, the two sides of the first prefabricated pile bodies top offer the first circular trough, and two
The inner surface of one circular trough is connected with the first steel reinforcement cage, and the top of the first steel reinforcement cage is through the first circular trough and extends to the
The outside of one circular trough, the two sides of the second prefabricated pile bodies top offer the second circular trough, two the second circular troughs it is interior
Surface activity is connected with the second steel reinforcement cage, and the top of the second steel reinforcement cage through the second circular trough and extends to the outer of the second circular trough
Portion is embedded with mounting blocks on the right side of the first prefabricated pile body, and the inside of mounting blocks offers thread groove, the first prefabricated pile body top
The front and rear sides in portion offer mounting groove, and the inner surface of thread groove is threaded with threaded post, and one end of threaded post is through the
Two prefabricated pile bodies and the inside for extending to mounting groove, by setting triangle convex and triangle groove, so that the first prefabricated pile sheet
Body and the second prefabricated pile body are laterally aligned, and by the first half square groove of setting, the second half square groove and rectangular reinforced frames, can be with
The gap of junction is disposed, mounting blocks, thread groove and threaded post is then utilized, is aligned its longitudinal direction, and by pouring
After form connecting key, finally cooperate the first steel reinforcement cage and the second steel reinforcement cage integrally to be poured, so that the connection of two prefabricated piles
Place's alignment does not generate gap, enhances the stability of diaphram wall.
(2), linkage precast pile type underground diaphragm wall, by fixed in the front and rear sides of the first prefabricated pile body outer surface
It is connected with the first pre-buried steel gusset, the first connecting plate, the second prefabricated pile body are fixedly connected at the top of the first pre-buried steel gusset
The front and rear sides of outer surface are fixedly connected to the second pre-buried steel gusset, are fixedly connected with second at the top of the second pre-buried steel gusset
Connecting plate, the side of the first connecting plate offer the first keyway, and the side of the second connecting plate offers the second keyway, and the second key
The side of the side of slot and the first keyway is in being staggeredly placed, by the first pre-buried steel gusset of setting and the first connecting plate, cooperation the
Two pre-buried steel gussets and the second connecting plate are attached, and form shearing resistance using casting concrete between the first keyway and the second keyway
Key, the stability that the first prefabricated pile body of enhancing is connected with the second prefabricated pile body.
(3), linkage precast pile type underground diaphragm wall, by being respectively in the depth of the first circular trough and the second circular trough
The inside of the 2/3 of one prefabricated pile body and the second prefabricated pile body, the first pre-buried steel gusset and the second pre-buried steel gusset opens up
There is through-hole, and the quantity of through-hole is provided with multiple, the inside side of offering of the first prefabricated pile body and the second prefabricated pile body
Shape pours slot, and there are four the rectangular quantity settings for pouring slot, by setting the first circular trough and the second round groove depth respectively
The 2/3 of the first prefabricated pile body and the second prefabricated pile body is set, the soil body can effectively be prevented to pour into the first circular trough and the second circle
In shape slot, setting through-hole can be used to drain, and the rectangular slot that pours, which is arranged, can be used to one-piece casting, form connecting key stability
By force.
Detailed description of the invention
Fig. 1 is the top view of internal structure of the invention；
Fig. 2 is the partial structurtes enlarged drawing in Fig. 1 of the present invention at A；
Fig. 3 is internal structure rearview of the invention；
Fig. 4 is internal structure main view of the invention；
Fig. 5 is the external structure side view of the first prefabricated pile body of the invention.
In figure, the prefabricated pile body of 1- first, the prefabricated pile body of 2- second, 3- triangle groove, 4- triangle convex, 5- the first half
Square groove, 6- the second half square groove, the rectangular reinforced frame of 7-, the first circular trough of 8-, the first steel reinforcement cage of 9-, the second circular trough of 10-, 11-
Two steel reinforcement cages, 12- mounting blocks, 13- thread groove, 14- mounting groove, 15- threaded post, the first pre-buried steel of 16- gusset, 17- first connect
Fishplate bar, the second pre-buried steel of 18- gusset, the second connecting plate of 19-, the first keyway of 20-, the second keyway of 21-, 22- through-hole, 23- are rectangular
Pour slot.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-5 is please referred to, the embodiment of the present invention provides a kind of technical solution: a kind of linkage precast pile type underground diaphragm wall, packet
The first prefabricated pile body 1 is included, the front and rear sides of the first prefabricated 1 outer surface of pile body are fixedly connected to the first pre-buried steel gusset
16, the top of the first pre-buried steel gusset 16 is fixedly connected with the first connecting plate 17, passes through the first pre-buried steel gusset 16 of setting and the
One connecting plate 17 cooperates the second pre-buried steel gusset 18 and the second connecting plate 19 to be attached, utilizes the first keyway 20 and the second key
Casting concrete forms shear key, the stabilization that the prefabricated pile body 1 of enhancing first and the second prefabricated pile body 2 connect between slot 21
Property, the side of the first connecting plate 17 offer the first keyway 20, and the side of the second connecting plate 19 offers the second keyway 21, and
In being staggeredly placed, the right side of the first prefabricated pile body 1 is connected with for the side of the side of two keyways 21 and the first keyway 20
The inside of two prefabricated pile bodies 2, the first prefabricated pile body 1 and the second prefabricated pile body 2 offer it is rectangular pour slot 23, and side
Shape pours there are four the quantity settings of slot 23, and it is pre- that the front and rear sides of the second prefabricated 2 outer surface of pile body are fixedly connected to second
Bury reinforced slab 18, the inside of the first pre-buried steel gusset 16 and the second pre-buried steel gusset 18 offers through-hole 22, and through-hole 22
Quantity is provided with multiple, and the top of the second pre-buried steel gusset 18 is fixedly connected with the second connecting plate 19, the first prefabricated pile body 1
Right side opening is equipped with triangle groove 3, and the left side of the second prefabricated pile body 2 is fixedly connected with triangle convex 4, and triangle convex 4 is outer
The inner surface of surface and triangle groove 3 is clamped, and the two sides of 3 inner wall of triangle groove offer the first half square grooves 5, triangle convex 4
The two sides of outer surface offer the second half square grooves 6, are flexibly connected between the first half square grooves 5 and the inner surface of the second half square grooves 6
There is a rectangular reinforced frame 7, the two sides at the first prefabricated 1 top of pile body offer the first circular trough 8, two the first circular troughs 8
Inner surface is connected with the first steel reinforcement cage 9, and the top of the first steel reinforcement cage 9 through the first circular trough 8 and extends to the first circle
The outside of slot 8, the two sides at the second prefabricated 2 top of pile body offer the second circular trough 10, and the first circular trough 8 and second is round
The depth of slot 10 is respectively the 2/3 of the first prefabricated pile body 1 and the second prefabricated pile body 2, the interior table of two the second circular troughs 10
Face is connected with the second steel reinforcement cage 11, and the top of the second steel reinforcement cage 11 through the second circular trough 10 and extends to the second circular trough
The right side of 10 outside, the first prefabricated pile body 1 is embedded with mounting blocks 12, and the inside of mounting blocks 12 offers thread groove 13, spiral shell
The quantity of groove 13 offers multiple, and thread groove 13 is evenly distributed in the two sides of mounting blocks 12, and the first prefabricated pile body 1 is pushed up
The front and rear sides in portion offer mounting groove 14, and the inner surface of thread groove 13 is threaded with threaded post 15, the shape of threaded post 15
Shape is linear type or L-type, and one end of threaded post 15 runs through the second prefabricated pile body 2 and extends to the inside of mounting groove 14, leads to
Setting triangle convex 4 and triangle groove 3 are crossed, so that the first prefabricated pile body 1 and the second prefabricated pile body 2 are laterally aligned, and
By the first half square groove 5 of setting, the second half square groove 6 and rectangular reinforced frames 7, it can handle the gap of junction, then utilize
Mounting blocks 12, thread groove 13 and threaded post 15, are aligned its longitudinal direction, and by forming connecting key after pouring, finally cooperate
First steel reinforcement cage 9 and 11 entirety of the second steel reinforcement cage are poured, so that the junction alignment of two prefabricated piles does not generate gap, are increased
The strong stability of diaphram wall.
In use, first that the triangle groove 3 of the first prefabricated pile body 1 and the triangle of the second prefabricated 2 side of pile body is convex
Block 4 is aligned, and is aligned the first half square grooves 5 and the second half square grooves 6, the thread groove being then screwed into threaded post 15 on mounting blocks 12
In 13, rectangular reinforced frame 7 is placed between the first half square grooves 5 and the second half square grooves 6 at this time, while the first connecting plate 17 and second
Connecting plate 19 is aligned, then by concrete construction in rectangular reinforced frame 7, mounting groove 14 and the first connecting plate 17 and the second connecting plate
In the first keyway 20 and the second keyway 21 between 19, further the first steel reinforcement cage 9 and the second steel reinforcement cage 11 are poured, most
It is whole afterwards to carry out pouring solidification.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of linkage precast pile type underground diaphragm wall, including the first prefabricated pile body (1), the first prefabricated pile body (1)
Right side is connected with the second prefabricated pile body (2), it is characterised in that: the right side opening of the first prefabricated pile body (1) is equipped with
Triangle groove (3) is fixedly connected with triangle convex (4) on the left of the second prefabricated pile body (2), and triangle convex (4)
The inner surface of outer surface and triangle groove (3) is clamped, and the two sides of triangle groove (3) inner wall offer the first half square grooves
(5), the two sides of triangle convex (4) outer surface offer the second half square grooves (6), the first half square groove (5) and second
It is connected between the inner surface of half square groove (6) rectangular reinforced frame (7), the two sides at the top of the first prefabricated pile body (1)
It offers the first circular trough (8), the inner surface of two first circular troughs (8) is connected with the first steel reinforcement cage (9), institute
The top of the first steel reinforcement cage (9) is stated through the first circular trough (8) and extends to the outside of the first circular trough (8), described second is pre-
Two sides at the top of pile body (2) processed offer the second circular trough (10), and the inner surface of two second circular troughs (10) is living
Dynamic to be connected with the second steel reinforcement cage (11), the top of second steel reinforcement cage (11) through the second circular trough (10) and extends to second
The outside of circular trough (10) is embedded with mounting blocks (12) on the right side of the first prefabricated pile body (1), the mounting blocks (12)
Inside offers thread groove (13), and the front and rear sides at the top of the first prefabricated pile body (1) offer mounting groove (14), institute
The inner surface for stating thread groove (13) is threaded with threaded post (15), and the second prefabricated pile sheet is run through in one end of the threaded post (15)
Body (2) and the inside for extending to mounting groove (14).
2. a kind of linkage precast pile type underground diaphragm wall according to claim 1, it is characterised in that: the thread groove (13)
Quantity offers multiple, and thread groove (13) is evenly distributed in the two sides of mounting blocks (12).
3. a kind of linkage precast pile type underground diaphragm wall according to claim 1, it is characterised in that: first circular trough
(8) and the depth of the second circular trough (10) is respectively the 2/3 of the first prefabricated pile body (1) and the second prefabricated pile body (2).
4. a kind of linkage precast pile type underground diaphragm wall according to claim 1, it is characterised in that: the threaded post (15)
Shape is linear type or L-type.
5. a kind of linkage precast pile type underground diaphragm wall according to claim 1, it is characterised in that: the first prefabricated pile sheet
The front and rear sides of body (1) outer surface are fixedly connected to the first pre-buried steel gusset (16), the first pre-buried steel gusset (16)
Top is fixedly connected with the first connecting plate (17).
6. a kind of linkage precast pile type underground diaphragm wall according to claim 5, it is characterised in that: the second prefabricated pile sheet
The front and rear sides of body (2) outer surface are fixedly connected to the second pre-buried steel gusset (18), the second pre-buried steel gusset (18)
Top is fixedly connected with the second connecting plate (19).
7. a kind of linkage precast pile type underground diaphragm wall according to claim 6, it is characterised in that: first connecting plate
(17) side offers the first keyway (20), and the side of second connecting plate (19) offers the second keyway (21), and the
The side of two keyways (21) and the side of the first keyway (20) are in be staggeredly placed.
8. a kind of linkage precast pile type underground diaphragm wall according to claim 6, it is characterised in that: first embedded bar
The inside of plate (16) and the second pre-buried steel gusset (18) offers through-hole (22), and the quantity of through-hole (22) be provided with it is multiple.
9. a kind of linkage precast pile type underground diaphragm wall according to claim 1, it is characterised in that: the first prefabricated pile sheet
The inside of body (1) and the second prefabricated pile body (2) offer it is rectangular pour slot (23), and the rectangular quantity for pouring slot (23) is set
There are four setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910605729.4A CN110306532B (en) | 2019-07-05 | 2019-07-05 | Chain precast pile underground continuous wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910605729.4A CN110306532B (en) | 2019-07-05 | 2019-07-05 | Chain precast pile underground continuous wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110306532A true CN110306532A (en) | 2019-10-08 |
| CN110306532B CN110306532B (en) | 2021-06-15 |
Family
ID=68079704
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910605729.4A Active CN110306532B (en) | 2019-07-05 | 2019-07-05 | Chain precast pile underground continuous wall |
Country Status (1)
| Country | Link |
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| CN (1) | CN110306532B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232567Y2 (en) * | 1973-06-30 | 1977-07-25 | ||
| TW201122182A (en) * | 2009-12-29 | 2011-07-01 | Saint Land Construction Engineering Corp | e structure. |
| WO2019000031A1 (en) * | 2017-06-26 | 2019-01-03 | Armour Wall Group Pty Limited | Top-to-bottom construction system |
| CN109881661A (en) * | 2019-03-20 | 2019-06-14 | 沈阳建筑大学 | Assembled underground continuous wall transverse connection structure |
| CN208996022U (en) * | 2018-10-25 | 2019-06-18 | 上海强劲地基工程股份有限公司 | A kind of diaphram wall containing precast construction |
-
2019
- 2019-07-05 CN CN201910605729.4A patent/CN110306532B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232567Y2 (en) * | 1973-06-30 | 1977-07-25 | ||
| TW201122182A (en) * | 2009-12-29 | 2011-07-01 | Saint Land Construction Engineering Corp | e structure. |
| WO2019000031A1 (en) * | 2017-06-26 | 2019-01-03 | Armour Wall Group Pty Limited | Top-to-bottom construction system |
| CN208996022U (en) * | 2018-10-25 | 2019-06-18 | 上海强劲地基工程股份有限公司 | A kind of diaphram wall containing precast construction |
| CN109881661A (en) * | 2019-03-20 | 2019-06-14 | 沈阳建筑大学 | Assembled underground continuous wall transverse connection structure |
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| Publication number | Publication date |
|---|---|
| CN110306532B (en) | 2021-06-15 |
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Effective date of registration: 20211222 Address after: 314500 room 221, floor 2, No. 77, ziye Road, Wuzhen Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Tongxiang Ruchu Information Technology Co.,Ltd. Address before: 510620 room 3a082, 3rd floor, 185 Huangsha Avenue Road, Liwan District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU S&Y AND CIVIL ENGINEERING GROUP Co.,Ltd. |