CN105780767B - Prefabricated pile Quick mechanical attachment means and construction method - Google Patents
Prefabricated pile Quick mechanical attachment means and construction method Download PDFInfo
- Publication number
- CN105780767B CN105780767B CN201610112378.XA CN201610112378A CN105780767B CN 105780767 B CN105780767 B CN 105780767B CN 201610112378 A CN201610112378 A CN 201610112378A CN 105780767 B CN105780767 B CN 105780767B
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- side plate
- prefabricated pile
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 8
- 238000003032 molecular docking Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000003755 preservative agent Substances 0.000 claims description 3
- 230000002335 preservative effect Effects 0.000 claims description 3
- 238000009416 shuttering Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
- E02D5/526—Connection means between pile segments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
Landscapes
- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of prefabricated pile Quick mechanical attachment means and construction method, including sub-buckle, box and the connection accessory for sub-buckle and box to be fixed, described box is an open-topped semi-enclosed cavity body structure, described sub-buckle is a closed cavity body structure, described sub-buckle is inserted into box from the top open part of box, and the side of sub-buckle and box is connected by connecting accessory.Prefabricated pile attachment means of the present invention belong to mechanical connection, and easy construction is easy to operate.Workmen is not required to the complicated construction technology of GPRS and can be carried out constructing operation.
Description
Technical field
The invention discloses a kind of prefabricated pile Quick mechanical attachment means and construction method.
Background technology
At present, concrete precast pile uses mainly as architecture foundation pile, vertical uniform load q is primarily subjected to, as the modern times build
It is more and more to build the underground structure such as the raising of significance level, Large Underground Parking Space, market, track traffic, it is necessary to which research is pre-
Popularization and application of the stake processed in underground deep-foundation pit engineering.Prefabricated pile should bear vertical load in deep-foundation pit engineering and horizontal loading is made
With also being used as uplift pile, therefore, the bending resistance of joint, shearing strength must all are fulfilled for.
Existing pile extension mode is mainly welded and the ratcheting connection of machinery.For welding structure due to being site operation, weld seam need to
The pile joint that full, welding is completed needs the continuous pile sinking of ability after natural cooling, and the handy time is more, and weldquality is by human factor
With the influence of weather condition, welding quality is difficult to ensure that, junction turns into the weakest link of prefabricated pile carrying.Existing machinery tooth
Type of attachment construction quality is closed easily to ensure, but joint bending resistance, shearing resistance are converted into bolt or pin tension and cut, and bolt and pin
Nail intensity is limited to size itself and material, and bearing capacity is relatively low, according to increased number of method, then influences efficiency of construction.For
The efficiency and quality of pile extension are improved, seeks other pile extension methods and seems particularly necessary.
The content of the invention
In place of problem and shortage present in background technology, the present invention proposes prefabricated pile Quick mechanical attachment means
And construction method.
The technical solution adopted by the present invention is as follows：
Prefabricated pile Quick mechanical attachment means, including sub-buckle, box and the company for sub-buckle and box to be fixed
Accessory is connect, described box is an open-topped semi-enclosed cavity body structure, and described sub-buckle is a closed cavity
Structure, and described sub-buckle is inserted into box from the top open part of box, and the side of sub-buckle and box is matched somebody with somebody by connection
Part connects.
Further, the sub-buckle, it includes end plate, shrouding, side plate and what is be connected in side plate and with side plate put more energy into
Floor, described end plate and shrouding form a closed cavity knot positioned at the top and bottom of side plate together with side plate respectively
Structure, and connecting hole is provided with side plate.
Further, the box, it includes end plate, side plate and the floor of putting more energy into being connected in side plate and with side plate,
The bottom that described end plate is located at side plate forms a semi-enclosed cavity body structure together with side plate, and connection is provided with side plate
Hole.
Further, described connection accessory, including connecting groove body, stress pin and bolt, described connection
Groove body is installed in the connecting hole of sub-buckle and box, and stress pin is installed in connecting groove body, is installed on stress pin
Bolt.
Further, described box side plate smears anti-corrosion material, ensures that prefabricated pile attachment means durability Design meets
It is required that.
Further, described sub-buckle and box are connected with upper and lower two section stakes respectively, and connected mode is that reinforcing bar wears weldering.
Further, the end plate planar dimension of the sub-buckle is identical with prefabricated pile cross sectional dimensions, passes through end plate and pile body
Reinforcing bar wears weldering, and sub-buckle is connected with pile body；Bottom shrouding act as closed cavity, does not play stress, thickness be less than end plate and
Side plate thickness；There is preformed hole on side plate, preformed hole size matches with being connected accessory.
Further, the end plate planar dimension of the box is identical with prefabricated pile cross sectional dimensions, passes through end plate and pile body
Reinforcing bar wears weldering, and box is connected with pile body；End plate central does not play stress, and thickness is less than edge thickness；Have on side plate reserved
Hole, preformed hole size match with being connected accessory.
Further, the wing plate side dimension of the connecting groove matches with double buckle side plate preformed hole size, inner side
For taper, match with stress pin size；It is welded in advance on side plate in connecting groove wing plate process, is cut into two
Point；Connecting groove bottom plate has preformed hole, preformed hole band screw, and the later stage is connected with bolt.
Further, the stress pin of the connection accessory be conically shaped body, side dimension connecting groove wing plate inner side chi
It is very little to match；There is preformed hole at stress pin center, and preformed hole size matches with bolt；Stress pin bearing capacity meets
Prefabricated pile carries design requirement.
Further, the box side plate is highly not less than sub-buckle side plate height.
The construction method of the prefabricated pile Quick mechanical attachment means, is comprised the steps of：
Step 1 processes joint of precast piles mechanical connecting device, according to prefabricated pile pile body arrangement of reinforcement in sub-buckle and the end plate of box
Upper processing welding preformed hole；
The prefabricated pile cages of step 2 colligation, sub-buckle and box are docked, after being fixed with connection accessory, sub-buckle and box
End plate wears weldering with pile body reinforcing bar and forms entirety respectively, and scene enters mould in place；
Step 3 shuttering, one-piece casting concrete, maintenance；
Step 4 is after concrete reaches design strength, stripper plate；
Step 5 removes connection accessory, and sub-buckle and box depart from, and prefabricated pile integrally complete by stake processed；
The entrucking of step 6 prefabricated pile merogenesis, transport to job site；
Step 7 lifts by crane first segment construction of prefabricated piles with lifting machine, fixed after first segment construction of prefabricated piles is to precalculated position
First segment prefabricated pile, lifting machine lifting the second section prefabricated pile, box, or box docking sub-buckle are docked by sub-buckle, by two sections
Stake positioning vertical butt joint up and down, sub-buckle and box side plate shape into complete connecting groove body, stress pin is placed into after docking
Connecting groove body, is fixed by bolt, and preservative is smeared on the outside of attachment means.
Step 8 repeat step 7 finishes prefabricated pile integral construction.
The invention compared with prior art, possessed advantage and good effect：
(1) prefabricated pile attachment means of the present invention belong to mechanical connection, and easy construction is easy to operate.Workmen need not slap
The construction technology for holding complexity can be carried out constructing operation.
(2) bending resistance of joint is converted into the tension of stress pin, and shearing resistance is undertaken by floor of putting more energy into, and bending resistance, shear resistance are big
It is big to strengthen, improve joint quality.
(3) pile body steel bar stress firmly wears weldering with joint connection so that the framework of steel reinforcement of section stake is integrally formed up and down
Structure, it is ensured that upper and lower pile extension is reliably connected.
(4) joint connection is connected with pile body during stake processed, carries out overall stake processed, ensure that later stage pile extension is reliable
Property, improve the perpendicularity of stake.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the prefabricated pile Quick mechanical attachment means floor map of the present invention；
Fig. 2 is Fig. 1 longitudinally cutting figure；
Fig. 3 is the box floor map of the present invention；
Fig. 4 is Fig. 3 longitudinally cutting figure；
Fig. 5 is the sub-buckle floor map of the present invention；
Fig. 6 is Fig. 5 longitudinally cutting figure；
Fig. 7 is the connection accessory schematic diagram of the present invention.
In figure：11- boxes；12- sub-buckles；13- connection accessories；14- pile body reinforcing bars；31- end plates；32- side plates；33- side plates
Put more energy into floor；41- connecting holes；51- end plates；52- side plates；53- side plates are put more energy into floor；61- connecting holes；62- shroudings；71- connections
Groove body；72- stress pins；73- bolts.
Embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, prefabricated pile Quick mechanical attachment means, including the sub-buckle 12 and box mutually snapped together
11, in addition to the connection accessory 13 that sub-buckle 12 and box 11 are fixed；Box 11 is an open-topped semi-enclosed cavity
Structure, described sub-buckle 12 is a closed cavity body structure, and described sub-buckle 12 is inserted from the top open part of box 11
Into box, and the side of sub-buckle 12 and box 11 is connected by connecting accessory 13；Described sub-buckle and box respectively with it is upper and lower
Two section stake connections, connected mode are that reinforcing bar wears weldering.Pile body steel bar stress firmly wears weldering with joint connection so that saves stake up and down
Framework of steel reinforcement be integrally formed structure, it is ensured that upper and lower pile extension is reliably connected.
This prefabricated pile attachment means belong to mechanical connection, and easy construction is easy to operate.Workmen is not required to GPRS complexity
Construction technology can be carried out constructing operation.
Further, as shown in Figure 5, Figure 6, the section of sub-buckle 12 is trapezoidal, is by end plate 51, shrouding 62, side plate 52 and interior
Side put more energy into floor 53 composition closed cavity；Described end plate 51 and shrouding 62 respectively positioned at the top and bottom of side plate 52 with
Side plate 52 forms a closed cavity body structure together, and connecting hole 61 is provided with side plate 52；Connecting hole 61 and connecting hole 41
Position relatively after, be connected by connecting accessory.
Further, as shown in Figure 3, Figure 4, the section of box 11 is inverted trapezoidal, is put more energy into by end plate 31, side plate 32 and outside
The semi-enclosed cavity that floor 33 forms；It includes end plate 31, side plate 32 and what is be connected in the side plate 32 and with side plate 32 add
Strength floor, the bottom that described end plate 31 is located at side plate 32 form a semi-enclosed cavity body structure together with side plate, and in side
Plate is provided with connecting hole 41；After connecting hole 41 is relative with the position of connecting hole 61, it is connected by connecting accessory.
Further, as shown in fig. 7, connection accessory includes connecting groove body 71, stress pin 72 and bolt 73, institute
The connecting groove body 71 stated is installed in the connecting hole of sub-buckle and box, and stress pin 72 is installed in connecting groove body, by
Bolt 73 is installed on power pin 72.
The bending resistance of joint is converted into the tension of stress pin, and shearing resistance is undertaken by floor of putting more energy into, and bending resistance, shear resistance are greatly
By force, joint quality is improved.
Further, box side plate 32 smears anti-corrosion material, ensures that prefabricated pile attachment means durability Design meets to require.
Further, the planar dimension of end plate 51 of sub-buckle 12 is identical with prefabricated pile cross sectional dimensions, passes through end plate and pile body
Reinforcing bar 14 wears weldering, and sub-buckle 12 is connected with upper pile body；Bottom shrouding act as closed cavity, does not play stress, and thickness is less than
End plate and side plate thickness；There is connecting hole 41 on side plate, the size of connecting hole 41 matches with being connected accessory.
Further, the planar dimension of end plate 31 of box 11 is identical with prefabricated pile cross sectional dimensions, passes through end plate and pile body
Reinforcing bar 14 wears weldering, and box 11 is connected with lower pile body；Stress is not played at the center of end plate 31, and thickness is less than edge thickness；Side plate
There is connecting hole 61 on 32, the size of connecting hole 61 matches with being connected accessory.
Further, the wing plate side dimension and double buckle side plate preformed hole size phase of the connecting groove 71 of accessory 13 are connected
Matching, inner side is taper, is matched with the size of stress pin 72；Side plate is welded in advance in the wing plate process of connecting groove 71
On, it is cut into two parts；The bottom plate of connecting groove 71 has preformed hole, preformed hole band screw, and the later stage is connected with bolt.
Further, the stress pin 72 for connecting accessory is conically shaped body, chi on the inside of the wing plate of side dimension connecting groove 71
It is very little to match；
The material of stress pin 72 can be cast iron, alloy etc., and there are preformed hole, preformed hole size and positioning in stress pin center
Bolt matches；Stress pin bearing capacity meets that prefabricated pile carries design requirement.
Further, because sub-buckle 12 is inserted into box, therefore the side plate of box 11 is highly high not less than the side plate of sub-buckle 12
Degree, ensure both perfect cooperations.
Further, the construction method of prefabricated pile Quick mechanical attachment means, is comprised the steps of：
Step 1 processes joint of precast piles mechanical connecting device, according to prefabricated pile pile body arrangement of reinforcement in sub-buckle and the end plate of box
Upper processing welding preformed hole；
The prefabricated pile cages of step 2 colligation, sub-buckle and box are docked, after being fixed with connection accessory, sub-buckle and box
End plate wears weldering with pile body reinforcing bar and forms entirety respectively, and scene enters mould in place；
Step 3 shuttering, one-piece casting concrete, maintenance；
Step 4 is after concrete reaches design strength, stripper plate；
Step 5 removes connection accessory, and sub-buckle and box depart from, and prefabricated pile integrally complete by stake processed；
The entrucking of step 6 prefabricated pile merogenesis, transport to job site；
Step 7 lifts by crane first segment construction of prefabricated piles with lifting machine, fixed after first segment construction of prefabricated piles is to precalculated position
First segment prefabricated pile, lifting machine lifting the second section prefabricated pile, box, or box docking sub-buckle are docked by sub-buckle, by two sections
Stake positioning vertical butt joint up and down, sub-buckle and box side plate shape into complete connecting groove body, stress pin is placed into after docking
Connecting groove body, is fixed by bolt, and preservative is smeared on the outside of attachment means.
Step 8 repeat step 7 finishes prefabricated pile integral construction.
Joint connection is connected by the present invention during stake processed with pile body, is carried out overall stake processed, is ensured later stage pile extension
Reliability, improve the perpendicularity of stake.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (7)
1. prefabricated pile Quick mechanical attachment means, it is characterised in that prefabricated pile Quick mechanical attachment means, it is characterised in that bag
Enclosed tool button, box and the connection accessory for sub-buckle and box to be fixed, described box are one open-topped
Semi-enclosed cavity body structure, described sub-buckle are a closed cavity body structure, top open part of the described sub-buckle from box
It is inserted into box, and the side of sub-buckle and box is connected by connecting accessory；Described connection accessory include connecting groove body,
Stress pin and bolt, described connecting groove body is installed in the connecting hole of sub-buckle and box, in connecting groove body
Stress pin is installed, bolt is installed on stress pin；The wing plate side dimension of the connecting groove body and double buckle side
Plate connecting hole size matches, and inner side is taper, matches with stress pin size；In connecting groove wing plate process in advance
It is welded on side plate, is cut into two parts；The bottom plate of connecting groove has preformed hole, preformed hole band screw, later stage and bolt
Connection；The stress pin is conically shaped body, and side dimension connecting groove wing plate inside dimensions match；Stress pin center has
Preformed hole, preformed hole size match with bolt；Stress pin bearing capacity meets that prefabricated pile carries design requirement.
2. prefabricated pile Quick mechanical attachment means as claimed in claim 1, it is characterised in that the sub-buckle includes end plate, envelope
Plate, side plate and the floor of putting more energy into being connected in side plate and with side plate, described end plate and shrouding are located at the top of side plate respectively
A closed cavity body structure is formed together with side plate with bottom, and connecting hole is provided with side plate.
3. prefabricated pile Quick mechanical attachment means as claimed in claim 2, it is characterised in that the end plate plane meter of the sub-buckle
Very little identical with prefabricated pile cross sectional dimensions, the phase wears weldering by end plate and pile body reinforcing bar, and sub-buckle is connected with pile body；The bottom envelope
Plate act as closed cavity, and its thickness is less than end plate and side plate thickness；Connecting hole size on side plate matches with being connected accessory.
4. prefabricated pile Quick mechanical attachment means as claimed in claim 1, it is characterised in that the box includes end plate, side
Plate and the floor of putting more energy into being connected in side plate and with side plate, the bottom that described end plate is located at side plate form one together with side plate
Individual semi-enclosed cavity body structure, and connecting hole is provided with side plate.
5. prefabricated pile Quick mechanical attachment means as claimed in claim 4, it is characterised in that the end plate plane meter of the box
It is very little identical with prefabricated pile cross sectional dimensions, weldering is worn by end plate and pile body reinforcing bar, box is connected with pile body；End plate thickness is less than
Edge thickness；The connecting hole size of side plate matches with being connected accessory.
6. prefabricated pile Quick mechanical attachment means as claimed in claim 1, it is characterised in that described box side plate is smeared anti-
Rotten material.
7. the method constructed using prefabricated pile Quick mechanical attachment means as claimed in claim 1, is comprised the steps of：
Step 1 processes joint of precast piles mechanical connecting device, is added according to prefabricated pile pile body arrangement of reinforcement on the end plate of sub-buckle and box
Work welding preformed hole；
The prefabricated pile cages of step 2 colligation, sub-buckle and box are docked, after being fixed with connection accessory, the end plate of sub-buckle and box
Weldering is worn with pile body reinforcing bar respectively and forms entirety, scene enters mould in place；
Step 3 shuttering, one-piece casting concrete, maintenance；
Step 4 is after concrete reaches design strength, stripper plate；
Step 5 removes connection accessory, and sub-buckle and box depart from, and prefabricated pile integrally complete by stake processed；
The entrucking of step 6 prefabricated pile merogenesis, transport to job site；
Step 7 lifts by crane first segment construction of prefabricated piles with lifting machine, after first segment construction of prefabricated piles is to precalculated position, fixes first
Prefabricated pile is saved, lifting machine lifting the second section prefabricated pile, box, or box docking sub-buckle is docked by sub-buckle, two are saved in stake
Lower positioning vertical butt joint, sub-buckle and box side plate shape into complete connecting groove body, connection is placed into by stress pin after docking
Groove body, fixed by bolt, preservative is smeared on the outside of attachment means；
Step 8 repeat step 7 finishes prefabricated pile integral construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112378.XA CN105780767B (en) | 2016-02-29 | 2016-02-29 | Prefabricated pile Quick mechanical attachment means and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112378.XA CN105780767B (en) | 2016-02-29 | 2016-02-29 | Prefabricated pile Quick mechanical attachment means and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105780767A CN105780767A (en) | 2016-07-20 |
| CN105780767B true CN105780767B (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610112378.XA Active CN105780767B (en) | 2016-02-29 | 2016-02-29 | Prefabricated pile Quick mechanical attachment means and construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758431A (en) * | 2012-08-01 | 2012-10-31 | 天津建城基业集团有限公司 | Solid square pile joint connection structure |
| CN103088816A (en) * | 2013-02-01 | 2013-05-08 | 江苏东浦管桩有限公司 | Novel tubular pile connector |
| CN203080510U (en) * | 2012-12-26 | 2013-07-24 | 苏州设计研究院股份有限公司 | Pin-sleeved type pile joint |
| CN103790156A (en) * | 2012-10-26 | 2014-05-14 | 上海中技桩业股份有限公司 | Square buckle plate mechanical pile splicing method for precast square piles |
| CN204753575U (en) * | 2015-03-24 | 2015-11-11 | 俞向阳 | A pile extension mechanism for concrete pile |
| CN105113503A (en) * | 2015-08-20 | 2015-12-02 | 宁波大学 | Precast concrete tubular pile |
-
2016
- 2016-02-29 CN CN201610112378.XA patent/CN105780767B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758431A (en) * | 2012-08-01 | 2012-10-31 | 天津建城基业集团有限公司 | Solid square pile joint connection structure |
| CN103790156A (en) * | 2012-10-26 | 2014-05-14 | 上海中技桩业股份有限公司 | Square buckle plate mechanical pile splicing method for precast square piles |
| CN203080510U (en) * | 2012-12-26 | 2013-07-24 | 苏州设计研究院股份有限公司 | Pin-sleeved type pile joint |
| CN103088816A (en) * | 2013-02-01 | 2013-05-08 | 江苏东浦管桩有限公司 | Novel tubular pile connector |
| CN204753575U (en) * | 2015-03-24 | 2015-11-11 | 俞向阳 | A pile extension mechanism for concrete pile |
| CN105113503A (en) * | 2015-08-20 | 2015-12-02 | 宁波大学 | Precast concrete tubular pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105780767A (en) | 2016-07-20 |
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