CN106120706B - Foundation-reinforcing device and foundation reinforcement method - Google Patents

Foundation-reinforcing device and foundation reinforcement method Download PDF

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Publication number
CN106120706B
CN106120706B CN201610488648.7A CN201610488648A CN106120706B CN 106120706 B CN106120706 B CN 106120706B CN 201610488648 A CN201610488648 A CN 201610488648A CN 106120706 B CN106120706 B CN 106120706B
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CN
China
Prior art keywords
floral tube
disk
hole
slip casting
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201610488648.7A
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Chinese (zh)
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CN106120706A (en
Inventor
王小军
蒋勇
韩凯吉
王文笛
程庆
王柳笛
周晓宇
李毅杰
周贤木
毛志鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University Ningbo Institute of Technology Asset Management Co., Ltd.
Original Assignee
Ningbo Polytechnic Institute Of Science And Technology Zhejiang University Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Ningbo Polytechnic Institute Of Science And Technology Zhejiang University Co Ltd filed Critical Ningbo Polytechnic Institute Of Science And Technology Zhejiang University Co Ltd
Priority to CN201610488648.7A priority Critical patent/CN106120706B/en
Publication of CN106120706A publication Critical patent/CN106120706A/en
Application granted granted Critical
Publication of CN106120706B publication Critical patent/CN106120706B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12Consolidating by placing solidifying or pore-filling substances in the soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02Improving by compacting
    • E02D3/046Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/44Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile

Abstract

The invention discloses a kind of foundation-reinforcing device and reinforcement means, which includes floral tube (1) and multiple slip casting disks (2);Floral tube (1) is equipped with the multi-turn injected hole (5) of different floor heights;The location hole of different floor heights is additionally provided on floral tube (1);Each slip casting disk (2) includes a hollow disk body (7) and more grouting pipes (8);Whole grouting pipes (8) are located at disk body (7) side wall;Each disk body (7) is equipped with for the positioning component with the location hole positioning on floral tube (1);The key of this method is:After successively filling filler and tamping, it is put into slip casting disk (2), when being finally in the milk, slurries enter slip casting disk (2) through floral tube (1), expanded hole (22) periphery soil body is entered by grouting pipe (8) again and forms warty concrete (24), and the warty concrete (24) of different pile bodies is cross-linked with each other.The apparatus and method can effectively reinforce the region between stake and stake.

Description

Foundation-reinforcing device and foundation reinforcement method
Technical field
The present invention relates to the excessive soil body stiffening basic ground fields of collapsibility and compressive deformation, are especially a kind of ground Bracing means and foundation reinforcement method.
Background technology
In the grounds such as loess and miscellaneous fill, silt, cohesive soil, generally existing collapsibility and the excessive danger of compressive deformation Evil to ground, it is necessary to carry out consolidation process to improve its foundation bearing capacity.The foundation stabilization of the prior art is mostly developed using column hammer Mode, i.e., first drill through basic hole, then partial filler is inserted into hole, then be repeatedly lifted up falling again by column hammer, by basic hole Impact expands, and filler is subsequently layered into expanded hole and continues to be hammered into shape by column and is tamped, and then forms column hammer and develops stake.On however, The load-carrying properties of handled consolidated subsoil layer are improved to a certain extent although stating column hammer and developing stake, due to the density of pile body It is much larger than institute soil mass consolidation with quality, so the stake soil body after reinforcing integrally easily causes the larger heavy of the subjacent bed soil body Drop.In order to avoid this sedimentation, it is thus proposed that, a micro-hole first is bored in basic hole bottom hole before column hammer develops, then arrangement of reinforcement is simultaneously Slip casing by pressure to form a micro perfusion stake, develops a bottom to support column hammer, column hammer is avoided to develop stake and its reinforced Soil layer causes the subjacent bed soil body new sedimentation.
However, the mode of the foundation stabilization of the prior art still has a greatest drawback:That is column hammer develops stake to the soil body The coverage of ground extruding effect is smaller, and only in pile body scope, and there are still the unguyed of weakness between stake and stake Processing or the region of consolidation process insufficient strength.
The content of the invention
The invention solves a technical problem be to provide and a kind of region between stake and stake can effectively be reinforced Foundation-reinforcing device.
The technical solution of the present invention is to provide a kind of foundation-reinforcing device, it include vertical floral tube with Multiple slip casting disks being slidably fitted on floral tube;
Floral tube top is connected with a guide rod, and floral tube outer wall is equipped with vertical guiding rib, and floral tube is equipped with different floor heights Multi-turn injected hole;The location hole of different floor heights is additionally provided on floral tube;
Each slip casting disk includes a hollow disk body and the more grouting pipes connected with disk body cavity;Disk body is by top Plate, bottom end plate and annular sidewall are formed, and whole grouting pipes are located on side wall, are equipped on headboard and bottom end plate and are worn for floral tube The centre bore crossed, centre bore are equipped with the notch of accommodating guiding rib;
Each disk body is equipped at least two groups of positioning components, and every group of positioning component includes a casing, a compression spring, an arc Shape baffle and a mandril for being used to be inserted into floral tube location hole, casing are hinged on the inside sidewalls of disk body, and the opening of casing is located at The inner end of non-articulated end, compression spring and mandril is respectively positioned in casing, and compression spring both ends are fixed respectively with casing bottom wall and mandril inner end;Arc Shape baffle is fixed on disk body bottom end plate, and curved baffle upper end is less than the hinge joint of casing, and mandril is kept off under compression spring effect with arc Plate pushes against;Casing is equipped with the first lantern ring, connects the first traction rope on the first lantern ring, and disk body headboard is equipped with the second lantern ring and for the The cord hole that one traction rope passes through connects the second traction rope on the second lantern ring.
The invention solves another technical problem be to provide it is a kind of can to the region between stake and stake carry out effectively plus Solid using the foundation-reinforcing device carry out foundation stabilization method.
The technical solution of the present invention is to provide a kind of side that foundation stabilization is carried out using the foundation-reinforcing device Method, step include:
A, the basic hole of subdrilling one, then bores a micro-hole in basic hole bottom hole, and floral tube is inserted into micro-hole and with slightly Sand tamps;
B, partial filler is inserted into basic hole, then column hammer is inserted in guide rod and floral tube, then lifting column is hammered into shape repeatedly, will Basic hole impact is expanded into expanded hole, and will be enlarged by the filling tamped in hole into the intensive packing layer of first layer;
C, first layer slip casting disk is inserted in floral tube, and the guiding rib of floral tube is caused to be caught in the notch of centre bore to realize note Starch the circumferential /V of disk, slip casting disk is transferred to the intensive packing layer of first layer by hand-held second traction rope, then on drag the first traction Rope so that casing is upward along curved baffle, and when sleeve water usually departs from curved baffle, the mandril in casing withstands the outer of floral tube Then wall above carries the second traction rope so that slip casting disk rises overally, and is inconjunction with mandril and also rises to first layer positioning against floral tube Hole height, mandril insertion location hole, realizes being accurately positioned for slip casting disk height;
D, filler is continued to fill up, and the intensive packing layer into last layer is tamped by column hammer;
E, last layer slip casting disk is inserted in floral tube and the intensive packing layer of last layer, Ran Houshang is transferred to by the second traction rope Drag the first traction rope again on drag the second traction rope so that the slip casting disk of this layer the last layer of floral tube location hole position;
F, step d~e is repeated, until being filled into ground level;
G, step a~f is repeated, until all pile bodies are all filled into ground level;
H, the guide rod of the floral tube upper end of each pile body is pulled out, then is in the milk to floral tube, grouting mini pile is formed in micro-hole, And in every layer of slip casting disk height, injected hole of the slurries through floral tube enters the disk body cavity of slip casting disk, then is entered by grouting pipe The expanded hole periphery soil body forms warty concrete, and the warty concrete of different pile bodies is cross-linked with each other, to the area between stake and stake Domain is effectively reinforced.
Foundation-reinforcing device of the present invention and the foundation-reinforcing device is utilized to carry out the method for foundation stabilization and prior art phase Than having following remarkable advantage and advantageous effect.
First, native internal injection of the technical solution by slip casting disk and grouting pipe around pile body, forms warty Concrete, and the warty concrete of different pile bodies is also cross-linked with each other, in this way, just to the region between originally weak stake and stake It is effectively reinforced, significantly improves whole foundation bearing capacity;It is accurate fixed to be equipped between especially each slip casting disk and floral tube The device of position, the warty concrete this assures the different pile bodies of same layer is contour, convenient for the warty coagulation of different pile bodies Soil is full cross-linked in same layer, without because height offsets one from another, further strengthening the ground in region between stake and stake Bearing capacity;Moreover guide rod is secured above floral tube, column hammer is linked on guide rod and floral tube, it is ensured that each hammer downwards of column hammer The vertical degree hit has ensured that column hammer develops banketing for stake and fully tamped, further the whole foundation bearing capacity of enhancing.
Description of the drawings
Fig. 1 is the positive structure diagram of foundation-reinforcing device of the present invention.
Fig. 2 is the positive structure diagram after the reinforcing of foundation-reinforcing device of the present invention.
Fig. 3 is partial enlargement sectional structure of the positioning component of foundation-reinforcing device of the present invention under the state that do not stress initially Schematic diagram.
Fig. 4 is that the positioning component of foundation-reinforcing device of the present invention and the partial enlargement sectional structure after floral tube positioning are illustrated Figure.
Fig. 5 is the slip casting disk of foundation-reinforcing device of the present invention and the overlooking the structure diagram of floral tube.
1, floral tube shown in figure, 2, slip casting disk, 3, guide rod, 4, guiding rib, 5, injected hole, 6, location hole, 7, disk body, 8, Grouting pipe, 9, centre bore, 10, notch, 11, casing, 12, compression spring, 13, curved baffle, 14, mandril, the 15, first lantern ring, 16, First traction rope, the 17, second lantern ring, 18, cord hole, the 19, second traction rope, 20, micro-hole, 21, column hammer, 22, expanded hole, 23, Intensive packing layer, 24, warty concrete.
Specific embodiment
The invention will be further described in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, foundation-reinforcing device of the present invention, it include vertical floral tube 1 with it is more A slip casting disk 2 being slidably fitted on floral tube 1.
1 top of floral tube is connected with a guide rod 3, and 3 outer diameter of guide rod is equal with 1 outer diameter of floral tube, and the two is through nipple It is spirally connected.1 outer wall of floral tube is equipped with vertical guiding rib 4, and floral tube 1 is equipped with the multi-turn injected hole 5 of different floor heights, a circle of sustained height Probably there are eight to ten injected holes 5.The location hole 6 of different floor heights is additionally provided on floral tube 1;As sustained height is set, there are two location holes 6。
Each slip casting disk 2 includes a hollow disk body 7 and the more horizontal direction grouting pipes connected with 7 cavity of disk body 8.Disk body 7 is made of headboard, bottom end plate and annular sidewall.Whole grouting pipes 8 be located on side wall and it is radial circumferentially It is uniformly distributed.The centre bore 9 passed through for floral tube 1 is equipped on headboard and bottom end plate, centre bore 9 is equipped with accommodating guiding rib 4 Notch 10.Notch 10 and guiding rib 4 coordinate so that the process of decentralization slip casting disk 2 will not rotate, it is ensured that slip casting in subsequent step Mandril 14 inside disk 2 can smoothly be inserted into the location hole 6 of floral tube 1.
Each disk body 7 is equipped with two groups of positioning components, and every group of positioning component includes a compression spring 12, one of casing 11, one Curved baffle 13 and a mandril 14 for being used to be inserted into 1 location hole 6 of floral tube.Casing 11 is hinged on the inside sidewalls of disk body 7, casing 11 opening is located at non-articulated end, and the inner end of compression spring 12 and mandril 14 is respectively positioned in casing 11,12 both ends of compression spring respectively with casing 11 bottom walls and 14 inner end of mandril are fixed.Curved baffle 13 is fixed on 7 bottom end plate of disk body, and 13 upper end of curved baffle is less than casing 11 Hinge joint, such relative position be to ensure that when casing 11 is drawn to horizontality mandril 14 just depart from curved baffle 13 and It is resisted against on the outer wall of floral tube 1.
But mandril 14 by traction before, i.e., under the original state acted in no external force, mandril 14 compression spring 12 effect under with Curved baffle 13 pushes against.Casing 11 is equipped with the first lantern ring 15, and the first traction rope 16,7 headboard of disk body are connected on the first lantern ring 15 Equipped with the second lantern ring 17 and the cord hole 18 that the first traction rope 16 is supplied to pass through, the second traction rope 19 is connected on the second lantern ring 17.
Above-mentioned traction rope and lantern ring are the contact methods of U-shaped, i.e. traction rope is through lantern ring and traction rope first and last Both ends are respectively positioned on outside stake holes, as such, it is desirable to head and end is pulled when drawing simultaneously, but need to dismantle traction rope when, unclamp head end End is drawn it become convenient substantially that so that traction rope departs from lantern ring, convenient for recycling traction rope.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, using foundation-reinforcing device of the present invention carry out foundation stabilization method, Step is as follows.
A, the basic hole of subdrilling one, then bores a micro-hole 20,20 aperture of micro-hole is far smaller than in basic hole bottom hole Basic hole aperture.Floral tube 1 is inserted into micro-hole 20 and is tamped with coarse sand so that the firm plug in micro-hole 20 of floral tube 1, but it is thick Sand granularity is big, will not block the injected hole 5 of floral tube 1.
B, insert partial filler into basic hole, then column hammer 21 is inserted in guide rod 3 and floral tube 1, then lifting column repeatedly The impact of basic hole is expanded into expanded hole 22, and will be enlarged by the filling tamped in hole 22 into the intensive packing layer 23 of first layer by hammer 21. The apical side height of every layer of intensive packing layer 23 can not accurately be held, but the height of every layer of location hole 6 of the big enable control in floral tube 1 In the range of the 10cm of degree lower section.
C, first layer slip casting disk 2 is inserted in floral tube 1, and the guiding rib 4 of floral tube 1 is caused to be caught in 7 headboard of disk body and bottom To realize the circumferential /V of slip casting disk 2 in the notch 10 of the centre bore 9 of plate.Hand-held second traction rope 19 transfers to slip casting disk 2 The intensive packing layer 23 of first layer, then on drag the first traction rope 16 so that casing 11 is upward along curved baffle 13, when casing 11 Depart from curved baffle 13 when horizontal, the mandril 14 in casing 11 withstands the outer wall of floral tube 1, then above carries the second traction rope 19, makes It obtains slip casting disk 2 to rise overally, is inconjunction with mandril 14 and also rises to 6 height of first layer location hole against floral tube 1, the insertion of mandril 14 is fixed Position hole 6, realizes being accurately positioned for slip casting 2 height on floral tube 1 of disk.
D, filler is continued to fill up, and the intensive packing layer 23 into the last layer such as second layer is tamped by column hammer 21;This layer intensive The apical side height of packing layer 23 is also substantially controlled below the height of the location hole 6 of same layer in the range of 10cm.
E, the slip casting disk 2 of the last layer such as second layer is inserted in floral tube 1 and last layer such as is transferred to by the second traction rope 19 Two layers of intensive packing layer 23, then on drag the first traction rope 16 again on drag the second traction rope 19 so that the slip casting disk 2 of this layer exists The location hole 6 of the last layer of the floral tube 1 such as second layer is accurately positioned.
F, step d~e is repeated, until the expanded hole 22 is filled into ground level.
G, step a~f is repeated, until the expanded hole 22 of all pile bodies is all filled into ground level.
H, the guide rod 3 of 1 upper end of floral tube of each pile body is pulled out, then is in the milk to each floral tube 1, is formed and filled in micro-hole 20 Mini pile is starched, and in every layer of 2 height of slip casting disk, 7 cavity of disk body of injected hole 5 entrance slip casting disk 2 of the slurries through floral tube 1, then by Grouting pipe 8 enters the 22 periphery soil body of expanded hole and forms warty concrete 24, and the warty of the sustained height of different pile bodies is mixed Solidifying soil 24 is cross-linked with each other, and the region between stake and stake is effectively reinforced.

Claims (2)

1. a kind of foundation-reinforcing device, it is characterised in that:It includes a vertical floral tube (1) and multiple is slidably fitted in floral tube (1) the slip casting disk (2) on;
Floral tube (1) top is connected with a guide rod (3), and floral tube (1) outer wall is equipped with vertical guiding rib (4), and floral tube (1) is equipped with The multi-turn injected hole (5) of different floor heights;The location hole (6) of different floor heights is additionally provided on floral tube (1);
Each slip casting disk (2) includes a hollow disk body (7) and the more grouting pipes (8) connected with disk body (7) cavity;Disk Body (7) is made of headboard, bottom end plate and annular sidewall, and the more grouting pipes (8) are arranged on annular sidewall, top The centre bore (9) passed through for floral tube (1) is equipped on end plate and bottom end plate, centre bore (9) is equipped with lacking for accommodating guiding rib (4) Mouth (10);
Each disk body (7) is equipped at least two groups of positioning components, and every group of positioning component includes a casing (11), a compression spring (12), a curved baffle (13) and a mandril (14) for being used to be inserted into floral tube (1) location hole (6), casing (11) are hinged on The inside sidewalls of disk body (7), the opening of casing (11) are located at non-articulated end, and the inner end of compression spring (12) and mandril (14) is respectively positioned on set It manages in (11), compression spring (12) both ends are fixed respectively with casing (11) bottom wall and mandril (14) inner end;Curved baffle (13) is fixed on Disk body (7) bottom end plate, curved baffle (13) upper end are less than the hinge joint of casing (11), mandril (14) compression spring (12) effect it is lower and Curved baffle (13) pushes against;Casing (11) is equipped with the first lantern ring (15), and the first traction rope (16), disk are connected on the first lantern ring (15) Body (7) headboard is equipped with the second lantern ring (17) and the cord hole (18) passed through for the first traction rope (16), and the second lantern ring connects on (17) Connect the second traction rope (19).
2. the method for foundation stabilization is carried out using foundation-reinforcing device described in claim 1, it is characterised in that:Its step bag It includes:
A, the basic hole of subdrilling one, then bores a micro-hole (20) in basic hole bottom hole, by floral tube (1) insertion micro-hole (20) And it is tamped with coarse sand;
B, partial filler is inserted into basic hole, then hammers column into shape (21) and is inserted in guide rod (3) and floral tube (1), is then lifted repeatedly Column hammers (21) into shape, the impact of basic hole is expanded into expanded hole (22), and the filling tamped that will be enlarged by hole (22) is intensive into first layer Packing layer (23);
C, first layer slip casting disk (2) is inserted in floral tube (1), and the guiding rib (4) of floral tube (1) is caused to be caught in lacking for centre bore (9) To realize the circumferential /V of slip casting disk (2) in mouthful (10), it is close that slip casting disk (2) is transferred to first layer by hand-held second traction rope (19) Collect packing layer (23), then on drag the first traction rope (16) so that casing (11) upwards, works as casing along curved baffle (13) (11) curved baffle (13) is departed from when horizontal, the mandril (14) in casing (11) withstands the outer wall of floral tube (1), then above carries second Traction rope (19) so that slip casting disk (2) rises overally, and is inconjunction with mandril (14) and also rises to first layer positioning against floral tube (1) Hole (6) height, mandril (14) insertion location hole (6) realize being accurately positioned for slip casting disk (2) height;
D, filler is continued to fill up, and (21) compacting is hammered into shape into the intensive packing layer (23) of last layer by column;
E, last layer slip casting disk (2) is inserted in floral tube (1) and the intensive packing layer of last layer is transferred to by the second traction rope (19) (23), then on drag the first traction rope (16) again on drag the second traction rope (19) so that the slip casting disk (2) of this layer is in floral tube (1) Last layer location hole (6) positioning;
F, step d~e is repeated, until being filled into ground level;
G, step a~f is repeated, until all pile bodies are all filled into ground level;
H, the guide rod (3) of floral tube (1) upper end of each pile body is pulled out, then is in the milk to floral tube (1), is formed and filled in micro-hole (20) Mini pile is starched, and in every layer of slip casting disk (2) height, injected hole (5) of the slurries through floral tube (1) enters the disk body (7) of slip casting disk (2) Cavity, then expanded hole (22) periphery soil body is entered by grouting pipe (8) and forms warty concrete (24), and the knurl of different pile bodies Shape concrete (24) is cross-linked with each other, and the region between stake and stake is effectively reinforced.
CN201610488648.7A 2016-06-27 2016-06-27 Foundation-reinforcing device and foundation reinforcement method Expired - Fee Related CN106120706B (en)

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Application Number Priority Date Filing Date Title
CN201610488648.7A CN106120706B (en) 2016-06-27 2016-06-27 Foundation-reinforcing device and foundation reinforcement method

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Application Number Priority Date Filing Date Title
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109778847B (en) * 2019-03-20 2021-04-09 祝波 Construction method and device of concrete cast-in-place pile
CN110670576A (en) * 2019-11-14 2020-01-10 新十建设集团有限公司 Building foundation reinforcing device and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1487150A (en) * 2003-04-16 2004-04-07 广东省建筑科学研究院 Combined grouting construction process of reinforcing foundation
JP3960372B2 (en) * 2001-10-16 2007-08-15 三谷セキサン株式会社 Foundation pile structure
CN202689003U (en) * 2012-07-11 2013-01-23 中国建筑第六工程局有限公司 Micropile grouting structure for foundation consolidation of existing buildings
CN104179174A (en) * 2014-08-13 2014-12-03 山东科技大学 Porous grouted pipe special-shaped pile and pile-forming method
CN204551430U (en) * 2015-04-01 2015-08-12 浙江宏宇工程勘察设计有限公司 A kind of pre-buried floral tube grouting and reinforcing device on soft foundation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3960372B2 (en) * 2001-10-16 2007-08-15 三谷セキサン株式会社 Foundation pile structure
CN1487150A (en) * 2003-04-16 2004-04-07 广东省建筑科学研究院 Combined grouting construction process of reinforcing foundation
CN202689003U (en) * 2012-07-11 2013-01-23 中国建筑第六工程局有限公司 Micropile grouting structure for foundation consolidation of existing buildings
CN104179174A (en) * 2014-08-13 2014-12-03 山东科技大学 Porous grouted pipe special-shaped pile and pile-forming method
CN204551430U (en) * 2015-04-01 2015-08-12 浙江宏宇工程勘察设计有限公司 A kind of pre-buried floral tube grouting and reinforcing device on soft foundation

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Effective date of registration: 20190523

Address after: Room 904, Executive Building No. 1 Qian Hunan Road, Yinzhou District, Ningbo City, Zhejiang Province, 315000

Patentee after: Zhejiang University Ningbo Institute of Technology Asset Management Co., Ltd.

Address before: 315048 Ningbo High-tech Zone, Zhejiang Province, No. 9 Building, Zone B, Lane 999, Yangfan Road, Ningbo City, China

Patentee before: Ningbo Polytechnic Institute of science and technology, Zhejiang University Co., Ltd.

Effective date of registration: 20190523

Address after: Room 904, Executive Building No. 1 Qian Hunan Road, Yinzhou District, Ningbo City, Zhejiang Province, 315000

Patentee after: Zhejiang University Ningbo Institute of Technology Asset Management Co., Ltd.

Address before: 315048 Ningbo High-tech Zone, Zhejiang Province, No. 9 Building, Zone B, Lane 999, Yangfan Road, Ningbo City, China

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Granted publication date: 20180525

Termination date: 20190627