CN101270576A - Secondary segmenting slip casting method for miniature pile - Google Patents
Secondary segmenting slip casting method for miniature pile Download PDFInfo
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- CN101270576A CN101270576A CNA2008100608986A CN200810060898A CN101270576A CN 101270576 A CN101270576 A CN 101270576A CN A2008100608986 A CNA2008100608986 A CN A2008100608986A CN 200810060898 A CN200810060898 A CN 200810060898A CN 101270576 A CN101270576 A CN 101270576A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000007569 slipcasting Methods 0.000 title claims description 44
- 239000004568 cement Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000011049 filling Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 33
- 239000004575 stone Substances 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000011218 segmentation Effects 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 206010010214 Compression fracture Diseases 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 239000004572 hydraulic lime Substances 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000002893 slag Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a minisize column secondary grouting method by section. The method includes the following steps: starting drilling after a drill is built on a working platform, the center of an aiguille is lead to face the center of a pile position and the chassis of the drill is maintained to be horizontal; adopting a positive circulation method and using the water as the method to circularly cooling the aiguille and removing slag until drilling to a designed depth; lifting up a drill stem by a crane system after using the drill stem to wash a hole and dismounting each node by sections; inserting the prepared steel reinforcement cage, the primary grouting pipe and the secondary grouting pipe into the hole; filling gravel aggregate to the opening of the hole; using prepared cement slurry to carry out primary grouting from the primary grouting pipe; using prepared cement slurry to carry out secondary grouting from the secondary grouting pipe. The invention adopts methods to control the grouting amount, the grouting pressure and the water-lime ratio of the grouting cement slurry by section to lead the secondary to be uniformly distributed along the body of the pile during the secondary grouting and reach a higher bearing capacity.
Description
Technical field
The present invention relates to technical field of civil engineering, especially relate to a kind of secondary segmenting slip casting method for miniature pile.
Background technology
In the mini pile secondary construction technology,,, generally adopted the cheap pvc pipe of price comparison at present therefore in order to reduce cost because the secondary grouting pipe is not recyclable in the past.Set aperture along depth direction every the distance of 0.5～1.0m, and with material seals such as adhesive tapes.During slip casting, the secondary grouting pipe is opened plug by the high pressure slurries after directly connecting grouting pump.Opening the position of plug can not control, but generally occurs in the position of pile concrete weakness, can not all open plug on whole Grouting Pipe.Often big especially during actual pile at the some degree of depth of pile body place grouting amount, can not guarantee that the slurries of secondary grouting distribute more uniformly along pile body.Influence the mini pile pile quality.
Summary of the invention
Be in order to solve the problem of above-mentioned existence, the object of the present invention is to provide a kind of secondary segmenting slip casting method for miniature pile, when secondary grouting, adopt methods such as segmentation control grouting amount, grouting pressure, injection cement paste water/binder ratio that secondary grouting is evenly distributed along pile body, and reach than high-bearing capacity.
To achieve these goals, the technical scheme of employing of the present invention is may further comprise the steps:
1) rig makes bit central over against center, stake position after just taking on the working platform, and after keeping the borer chassis level, begins boring;
2) adopt the direct circulation method, water directly gets into projected depth as circulation cooling drill bit and deslagging method, utilize drilling rod to carry out hole flushing after, tackling system will be carried on the drilling rod, with each joint segmentation dismounting;
3) reinforcing cage, once grouting pipe and the secondary grouting pipe of making inserted in the hole;
4) fill out the filling crushed stone aggregate to the aperture;
5) carry out once grouting with the cement paste for preparing from the once grouting pipe;
6) carry out secondary grouting with the cement paste for preparing from the secondary grouting pipe;
7) finish construction behind the secondary grouting.
In the described step 1), when the taper pile pore-forming, adopt rig sole bed hedgehopping, check that with compass the gradient bit central of drilling rod is over against inclined hole pile center.
In the described step 3), the once grouting pipe adopts φ 30 coating steel pipes, every joint length is 2m, casing coupling in once grouting union place adopts, make outer tube wall smooth, extract from concrete to make things convenient for the once grouting pipe, the secondary grouting pipe is selected the high resistance to compression fracture grouting of φ 48PVC pipe for use, the secondary grouting pipe is opened an injected hole every 50cm, with the rubber case sealing, the sealing of the pipe end, colligation is in reinforcing cage, in the reinforcing cage sinking arrives boring, after reinforcing bar hung onto design attitude, the weldering lancet was mentioned reinforcing cage and is fixed on frame or is shelved on the steel pipe on ground, prevented because constantly that reinforcing cage is thrust is darker in the hole clearly, reinforcing cage hangs and finishes, Grouting Pipe next time in the hole.
In the described step 4), after hanging and finish, reinforcing cage, Grouting Pipe supply water to washing deslagging at the bottom of the hole with the once grouting pipe, make sediment thickness less than 200mm, and mud balance drops to below 1.1～1.2, fill out and irritate crushed stone aggregate to the top of holing, when crushed stone aggregate is inserted, continue in boring, to inject the high pressure clear water by the once grouting pipe and carry out hole clearly.
In the described step 5), when clear hole does not contain silt particle to the water of emerging in the aperture, beginning slip casting, before slip casting, began to prepare cement paste in 20～30 minutes, the water/binder ratio of cement paste is 0.4～0.5, cement paste is pumped into the once grouting pipe with grouting pump, the grouting pump service pressure is controlled at 0.2～0.4MPa until filling during once grouting, the aperture underflow of emerging, once grouting finishes, and pulls out the once grouting pipe, whenever pull out 2m after-teeming slurry once, till extracting, the once grouting cement consumption is controlled at 500～800kg/m3, and stake is long, the soil condition difference is got high value.
In the described step 6), treat that once grouting liquid reaches initial set, begin secondary grouting after 5～7 hours, following two way seal slip casting core pipe is pressed into slurries by grouting pump at the bottom of the secondary grouting pipe pipe in slip casting core pipe, the grouting pressure of secondary grouting is 0.8～1.0MPa, the cement consumption of secondary grouting is controlled at half of once grouting consumption, after the grouting amount of this position reaches designing requirement, promotes casting head, carry out the slip casting of next section pile body, so segmenting slip casting pushes up until stake.
The beneficial effect that the present invention has is:
The present invention adopts methods such as segmentation control grouting amount, grouting pressure, injection cement paste water/binder ratio that secondary grouting is evenly distributed along pile body when secondary grouting, and reaches than high-bearing capacity.
Description of drawings
Fig. 1 is the process chart of job practices of the mini pile secondary segmenting slip casting of one embodiment of the present of invention;
Fig. 2 is a two way seal slip casting core pipe schematic diagram.
Among the figure: 1. once grouting pipe, 2. secondary grouting pipe, 3. slip casting tube core, 4. clear water, 5. mud, 6. once grouting, 7. secondary grouting, 8. centring ring, 9. elastic tape, 10. slurry check ring, 11. coating steel pipes, 12. connectors, 13. slip casting directions, the 14. point ends.
The specific embodiment
The present invention is the job practices of a kind of mini pile (stake of pile body diameter≤450mm) segmenting slip casting, and this method comprises the steps:
1) check the various construction machineries and the corollary equipment thereof of rig and slip casting, whether emphasis inspection rig can operate as normal, and whether drilling rod is complete, and whether the size of drill bit adheres to specification, and whether grouting pump is working properly, and whether flow meter, pressure meter show normally.Materials such as cement, stone and reinforcing bar are got all the ready, performed before the construction and the preparation of boring;
2) rig is after just taking on the working platform, and mobile rig makes center of turntable rough alignment casing center, the lifting drill bit, and little rig that moves makes bit central over against the stake position, and after keeping the borer chassis level, can begin boring;
3) adopt the direct circulation method, water is as circulation cooling drill bit and deslagging method, and water and earth mix and becomes muddy together in drilling process simultaneously, play the effect of guard aperture wall.Directly get into projected depth, utilize drilling rod to carry out hole flushing, with reach overflow more clear water till.After hole flushing was finished, tackling system will be carried on the drilling rod, with each joint segmentation dismounting;
4) reinforcing cage, once grouting pipe and the secondary grouting pipe of making inserted in the hole;
5) fill out the filling crushed stone aggregate to the aperture;
6) carry out once grouting with the cement paste for preparing from the once grouting pipe;
7) carry out secondary grouting with the cement paste for preparing from the secondary grouting pipe;
8) finish construction behind the secondary grouting.
Above-mentioned steps 1) in, boring preparation mainly contains and measures setting-out, arrangement place, lay sidewalk, make and bury casing underground, mud pit and feed cistern etc. are set.Casing is buried underground with digging the method for burying, and its end face 10cm above ground level prevents bad aperture of drilling tool bruising.
Above-mentioned steps 2) in, when the taper pile pore-forming, adopts rig sole bed hedgehopping, check the gradient of drilling rod with compass to the method that requires.
Above-mentioned steps 3) in, starts the machine and stop when beginning to creep into owing to the operation reason makes the bit hits casing cause off normal.Pierce strict controlled drilling rate in the process, at first at a slow speed, go into the middle-grade drilling depth in 4～5m left and right sides.When sand clay creeps into, available two, third gear rotating speed, free drilling depth.When in sand, creeping into, should use one, the second gear rotating speed, and controlled footage is not in order to avoid subsidence drill bit or speed catch up with.When entering the flour sand layer, should creep at a slow speed with low grade, reduce the stirring of creeping into to silt.Creep into reach design elevation after, creep into about 10～20cm again.When creeping into, answer controlled footage speed in silt, when taking place to cave in the hole, should distinguish the position that caves in, the backfill clay is to the above 1～2m in place, hole that collapses, as the seriously all backfills of hole of collapsing, treat backfill deposit closely knit after capable again creeping into.
As Fig. 1, shown in Figure 2, above-mentioned steps 4) in, reinforcing cage is by design and job specfication requirement construction, and the hoop of putting more energy into is located at the main muscle outside, and main muscle is not established crotch, makes topping with circular rotating mortar piece.When the space of construction hour, can the reinforcing cage sectional making be welded when sinking.Secondary grouting pipe 2 is selected the high resistance to compression fracture grouting of φ 48PVC pipe for use, and the secondary grouting pipe is opened an injected hole every 50cm, and with elastic tapes 9 sealings of being fixed by centring ring 8, colligation is in reinforcing cage, in the reinforcing cage sinking arrives boring by the point ends 14 sealing at the pipe end.When burying reinforcing cage underground, want the mating holes position to hang and directly hold up surely, slowly sink along it, avoid colliding hole wall, sink when not going down if reinforcing cage takes place, reinforcing cage must be hung out the position, hole, carry out cleaning bottom of hole, forbid to sling that reinforcing cage flumps or method such as manpower twisting forces reinforcing cage sink with a stake machine, under the reinforcing bar behind design attitude, weld a lancet immediately in the above and mention reinforcing cage and be fixed on frame or be shelved on the steel pipe on ground, prevent that reinforcing cage is thrust is darker owing to constantly clear hole.Reinforcing cage hangs and finishes, Grouting Pipe next time in the hole.Once grouting pipe 1 adopts φ 30 coating steel pipes, and every joint length is preferably 2m.Casing coupling in once grouting union place adopts makes outer tube wall smooth, extracts from concrete to make things convenient for the once grouting pipe.
Above-mentioned steps 5) in, reinforcing cage, Grouting Pipe sinking finish the back and supply to wash deslagging at the bottom of 4 pairs of holes of clear water with the once grouting pipe, make sediment thickness less than 200mm, and mud 5 proportions drop to below 1.1～1.2 as far as possible.Fill out after meeting the requirements and irritate crushed stone aggregate, when crushed stone aggregate is inserted, continue by the once grouting pipe that injection high pressure clear water carries out hole clearly in boring, prevent earth inserting and sneak in the boring with stone to the top of holing.
As shown in Figure 1, above-mentioned steps 6) in, slip casting cement adopts No. 425 Portland cements.Earlier it is carried out quality examination before using, its fineness and volume stability must meet the requirements.The cement paste water must clean, pollution-free, must not contain oil, acid, salt and organic matter etc.Began to prepare cement paste in preceding about 30 minutes in slip casting.Fully stir in agitator, flow out from grout outlet the back that stirs, and net filtration is removed the particle and the impurity that do not have aquation in the slurries after filtration.The slurries that filter enter grouting pump, are pumped into Grouting Pipe again.The water/binder ratio of cement paste is controlled at 0.4～0.5.When clear hole does not contain silt particle to the water of emerging in the aperture (can not end clear hole before the slip casting), can begin slip casting.The grouting pump service pressure is controlled at about 0.3MPa during once grouting 6.In slip casting when work,, injection slurry emits on should be evenly, until filling, and the aperture underflow of emerging, mud jacking just comes to an end; Slip casting finishes, and pulls out the once grouting pipe immediately, whenever pulls out the 2m after-teeming once, till extracting.Slip casting should be carried out continuously, must not interrupt, and as plugging takes place, should in time take suitable treatment measures.In whole slip casting process,, boring top stone is had to a certain degree sink, so need progressively pour into stone to the top because the tube drawing process causes vibration.Strict control water eventually the end face absolute altitude (add more than the design stake top mark height irritate length should 〉=500mm).The once grouting cement consumption is controlled at 500～800kg/m
3, stake is long, the soil condition difference is got high value.
As shown in Figure 2, above-mentioned steps 7) in, treat that once grouting liquid reaches initial set, beginning secondary grouting 7 after 5～7 hours.Put down two way seal slip casting core pipe 3 to the secondary grouting pipe 2 pipe ends, by grouting pump toward connect slip casting core pipes 3 by connector 12
Be pressed into slurries along slip casting direction 13 in 20 coating steel pipes 11.Slurry check ring 10 control grouting pressures are established in connector 12 and slip casting tube core 3 ends, and the grouting pressure of secondary grouting is 0.8～1.0MPa.The cement consumption of secondary grouting is controlled at about half of once grouting consumption.After the grouting amount of this position reaches designing requirement, promote casting head, carry out the slip casting of next section pile body.So segmenting slip casting pushes up until stake.
The flow process of whole secondary segmenting slip casting method for miniature pile is: as shown in Figure 1a, rig is after just taking on the working platform, and mobile rig makes center of turntable rough alignment casing center, the lifting drill bit, little rig that moves makes bit central over against the stake position, and keeps the borer chassis level; Then, shown in Fig. 1 b, rig boring and mud off; Then, shown in Fig. 1 c, boring is finished, and puts reinforcing cage and Grouting Pipe, the clear hole of clear water; Then, shown in Fig. 1 d, fill out crushed stone aggregate, continue clear hole to position, stake top; Then, shown in Fig. 1 e, once grouting; Then, shown in Fig. 1 f, promote the once grouting pipe; Then, shown in Fig. 1 g, secondary grouting; Afterwards, shown in Fig. 1 h, finish the pile body construction.
Claims (6)
1, a kind of secondary segmenting slip casting method for miniature pile is characterized in that this method comprises the steps:
1) rig makes bit central over against center, stake position after just taking on the working platform, and after keeping the borer chassis level, begins boring;
2) adopt the direct circulation method, water directly gets into projected depth as circulation cooling drill bit and deslagging method, utilize drilling rod to carry out hole flushing after, tackling system will be carried on the drilling rod, with each joint segmentation dismounting;
3) reinforcing cage, once grouting pipe and the secondary grouting pipe of making inserted in the hole;
4) fill out the filling crushed stone aggregate to the aperture;
5) carry out once grouting with the cement paste for preparing from the once grouting pipe;
6) carry out secondary grouting with the cement paste for preparing from the secondary grouting pipe;
7) finish construction behind the secondary grouting.
2, a kind of secondary segmenting slip casting method for miniature pile according to claim 1 is characterized in that: in the described step 1), when the taper pile pore-forming, adopt rig sole bed hedgehopping, check that with compass the gradient bit central of drilling rod is over against inclined hole pile center.
3, a kind of secondary segmenting slip casting method for miniature pile according to claim 1, it is characterized in that: in the described step 3), the once grouting pipe adopts φ 30 coating steel pipes, every joint length is 2m, casing coupling in once grouting union place adopts, make outer tube wall smooth, extract from concrete to make things convenient for the once grouting pipe, the secondary grouting pipe is selected the high resistance to compression fracture grouting of φ 48PVC pipe for use, and the secondary grouting pipe is opened an injected hole every 50cm, seals with rubber case, the sealing of the pipe end, colligation in reinforcing cage, with the reinforcing cage sinking in boring, reinforcing bar hung onto design attitude after, the weldering lancet is mentioned reinforcing cage and is fixed on frame or is shelved on the steel pipe on ground, prevent that reinforcing cage is thrust is darker owing to continuous clear hole, reinforcing cage hangs and finishes, Grouting Pipe next time in the hole.
4, a kind of secondary segmenting slip casting method for miniature pile according to claim 1, it is characterized in that: in the described step 4), after hanging and finish, reinforcing cage, Grouting Pipe supply water to washing deslagging at the bottom of the hole with the once grouting pipe, make sediment thickness less than 200mm, and mud balance drops to below 1.1～1.2, fill out and irritate crushed stone aggregate, when crushed stone aggregate is inserted, continue in boring, to inject the high pressure clear water by the once grouting pipe and carry out hole clearly to the top of holing.
5, a kind of secondary segmenting slip casting method for miniature pile according to claim 1, it is characterized in that: in the described step 5), when clear hole does not contain silt particle to the water of emerging in the aperture, beginning slip casting, before slip casting, began to prepare cement paste in 20～30 minutes, the water/binder ratio of cement paste is 0.4～0.5, cement paste is pumped into the once grouting pipe with grouting pump, the grouting pump service pressure is controlled at 0.2～0.4MPa until filling during once grouting, the aperture underflow of emerging, and once grouting finishes, pull out the once grouting pipe, whenever pull out 2m after-teeming slurry once, till extracting, the once grouting cement consumption is controlled at 500～800kg/m
3, stake is long, the soil condition difference is got high value.
6, a kind of secondary segmenting slip casting method for miniature pile according to claim 1, it is characterized in that: in the described step 6), treat that once grouting liquid reaches initial set, begin secondary grouting after 5～7 hours, following two way seal slip casting core pipe is at the bottom of the secondary grouting pipe pipe, in slip casting core pipe, be pressed into slurries by grouting pump, the grouting pressure of secondary grouting is 0.8～1.0MPa, the cement consumption of secondary grouting is controlled at half of once grouting consumption, after the grouting amount of this position reaches designing requirement, promote casting head, carry out the slip casting of next section pile body, so segmenting slip casting pushes up until stake.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100608986A CN101270576A (en) | 2008-03-25 | 2008-03-25 | Secondary segmenting slip casting method for miniature pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100608986A CN101270576A (en) | 2008-03-25 | 2008-03-25 | Secondary segmenting slip casting method for miniature pile |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102051882A (en) * | 2010-11-23 | 2011-05-11 | 北京市公路桥梁建设集团有限公司 | Anchor pipe and anchor pipe type soil nailing wall support method |
| CN102392511A (en) * | 2011-10-24 | 2012-03-28 | 上海市第二市政工程有限公司 | Sleeve pressure type grouting construction method for steel reinforcement connection |
| CN102400462A (en) * | 2011-10-19 | 2012-04-04 | 山东科技大学 | Secondary pressure grouting small pile construction process in seismic strengthening treatment of foundation |
| CN103343534A (en) * | 2013-07-31 | 2013-10-09 | 中国二十二冶集团有限公司 | Closed precipitation method for foundation pit construction |
| CN103882858A (en) * | 2012-12-19 | 2014-06-25 | 五冶集团上海有限公司 | Construction method of micro-piles with diameter of 300 mm |
| CN104196474A (en) * | 2014-08-27 | 2014-12-10 | 中国地质大学（武汉） | Pre-pouring air lift hole cleaning device of drilled grouting pile and hole cleaning method of pre-pouring air lift hole cleaning device |
| CN104389308A (en) * | 2014-10-17 | 2015-03-04 | 中建四局第六建筑工程有限公司 | Construction method of cast-in-situ stiff piles for foundation pit supporting |
| CN104452755A (en) * | 2014-12-06 | 2015-03-25 | 国家电网公司 | Honeycomb type thin-wall steel pipe and micro pile construction method adopting same |
| CN107023302A (en) * | 2017-05-26 | 2017-08-08 | 华东交通大学 | A kind of micro-disturbance advanced tubule device and its application method |
| CN107882020A (en) * | 2017-11-24 | 2018-04-06 | 苏州枫石堂工程科技有限公司 | A kind of Trees with Small Diameters pile construction method and cleaning grouting device |
| CN108086325A (en) * | 2018-01-26 | 2018-05-29 | 中国建筑第八工程局有限公司 | Grouting Pipe and its construction method in pile foundation construction |
| CN108193677A (en) * | 2018-01-16 | 2018-06-22 | 上海港湾基础建设（集团）股份有限公司 | High pressure mortar piled anchor method for processing foundation |
| CN108677939A (en) * | 2018-06-07 | 2018-10-19 | 上海勘察设计研究院(集团)有限公司 | A kind of pile-end post-grouting failure method of disposal and device |
| CN115110516A (en) * | 2022-07-15 | 2022-09-27 | 河南省黄河高速公路有限公司 | Ultra-long cast-in-place pile side high polymer sectional type post-grouting construction system and method |
| CN115721974A (en) * | 2023-01-28 | 2023-03-03 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
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| CN102051882A (en) * | 2010-11-23 | 2011-05-11 | 北京市公路桥梁建设集团有限公司 | Anchor pipe and anchor pipe type soil nailing wall support method |
| CN102400462A (en) * | 2011-10-19 | 2012-04-04 | 山东科技大学 | Secondary pressure grouting small pile construction process in seismic strengthening treatment of foundation |
| CN102392511A (en) * | 2011-10-24 | 2012-03-28 | 上海市第二市政工程有限公司 | Sleeve pressure type grouting construction method for steel reinforcement connection |
| CN103882858A (en) * | 2012-12-19 | 2014-06-25 | 五冶集团上海有限公司 | Construction method of micro-piles with diameter of 300 mm |
| CN103343534A (en) * | 2013-07-31 | 2013-10-09 | 中国二十二冶集团有限公司 | Closed precipitation method for foundation pit construction |
| CN104196474A (en) * | 2014-08-27 | 2014-12-10 | 中国地质大学（武汉） | Pre-pouring air lift hole cleaning device of drilled grouting pile and hole cleaning method of pre-pouring air lift hole cleaning device |
| CN104389308A (en) * | 2014-10-17 | 2015-03-04 | 中建四局第六建筑工程有限公司 | Construction method of cast-in-situ stiff piles for foundation pit supporting |
| CN104452755A (en) * | 2014-12-06 | 2015-03-25 | 国家电网公司 | Honeycomb type thin-wall steel pipe and micro pile construction method adopting same |
| CN107023302A (en) * | 2017-05-26 | 2017-08-08 | 华东交通大学 | A kind of micro-disturbance advanced tubule device and its application method |
| CN107023302B (en) * | 2017-05-26 | 2023-08-15 | 华东交通大学 | Micro-disturbance advance small catheter device and application method thereof |
| CN107882020A (en) * | 2017-11-24 | 2018-04-06 | 苏州枫石堂工程科技有限公司 | A kind of Trees with Small Diameters pile construction method and cleaning grouting device |
| CN108193677A (en) * | 2018-01-16 | 2018-06-22 | 上海港湾基础建设（集团）股份有限公司 | High pressure mortar piled anchor method for processing foundation |
| CN108086325A (en) * | 2018-01-26 | 2018-05-29 | 中国建筑第八工程局有限公司 | Grouting Pipe and its construction method in pile foundation construction |
| CN108677939A (en) * | 2018-06-07 | 2018-10-19 | 上海勘察设计研究院(集团)有限公司 | A kind of pile-end post-grouting failure method of disposal and device |
| CN108677939B (en) * | 2018-06-07 | 2020-11-27 | 上海勘察设计研究院(集团)有限公司 | Pile end post-grouting failure handling method and device |
| CN115110516A (en) * | 2022-07-15 | 2022-09-27 | 河南省黄河高速公路有限公司 | Ultra-long cast-in-place pile side high polymer sectional type post-grouting construction system and method |
| CN115110516B (en) * | 2022-07-15 | 2024-05-28 | 河南省黄河高速公路有限公司 | Super-long cast-in-place pile side high polymer sectional type post grouting construction system and method |
| CN115721974A (en) * | 2023-01-28 | 2023-03-03 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
| CN115721974B (en) * | 2023-01-28 | 2023-04-04 | 中铁电气化局集团有限公司 | Slurry circulation preparation grouting system behind shield muck wall |
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