CN104929135A - Deep foundation pit underground diaphragm wall enclosure structure and chemical churning pile water stop construction method thereof - Google Patents
Deep foundation pit underground diaphragm wall enclosure structure and chemical churning pile water stop construction method thereof Download PDFInfo
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- CN104929135A CN104929135A CN201510351859.1A CN201510351859A CN104929135A CN 104929135 A CN104929135 A CN 104929135A CN 201510351859 A CN201510351859 A CN 201510351859A CN 104929135 A CN104929135 A CN 104929135A
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Abstract
The invention relates to a deep foundation pit underground diaphragm wall enclosure structure and a chemical churning pile water stop construction method thereof. The enclosure structure comprises an underground diaphragm wall, a leakage point, a sealing steel plate and a diversion steel pipe, wherein the sealing steel plate is placed on the underground diaphragm wall surface, four corners of the sealing steel plate are fixed on the underground diaphragm wall through expansion bolts, the leakage point is aligned with the diversion steel pipe, a valve is arranged on the diversion steel pipe, and at the same time, an edge sealing material is used for edge sealing along a seam of the sealing plate and the underground diaphragm wall surface; the chemical churning pile water stop construction method of the enclosure structure comprises the steps of positioning-guide hole drilling-in position of a chemical churning pile machine-jet grouting-rotary lifting-pile forming-reinjection-single pile completion. According to the enclosure structure and the chemical churning pile water stop construction method, sealing and treatment can be performed timely when piping occurs to the diaphragm wall surface while smooth operation of a foundation pit project can be guaranteed, personal and property safety of a construction person is guaranteed, and a necessary technical support is provided for the smooth operation of the construction.
Description
[technical field]
The present invention relates to a kind of deep foundation ditch underground continuous wall-enclosure structure and rotary churning pile water stopping construction method thereof, belong to deep foundation ditch waterproof and leaking stoppage technology field.
[background technology]
According to place hydrogeological conditions and the excavation of foundation pit degree of depth, larger on foundation ditch impact is shallow-layer diving and deep water in confined.When base pit engineering excavates; face severe artesian water problem; for the surrounding enviroment of protection construction; base pit engineering diaphragm wall enters rock stratum and cuts off artesian water inside and outside foundation ditch; but the underground water affecting base pit engineering is the diving of superficial part and the artesian water in deep, adopt two filter dewatering well to carry out precipitation for these two kinds of underground water, top filter is positioned at diving position; bottom filter is positioned at soil with confined aquifer, therefore the sealing performance of diaphragm wall seam is most important to excavation of foundation pit safety.If do not reach stagnant water effect, easily there is percolating water situation in diaphragm wall in Excavation Process, causes foundation ditch periphery earth's surface water level decreasing, cause ground settlement, crisis surrounding building safety, if process not in time, then develop into water burst risk.
Cement paste jet surrounding is protected with compressed air, and along with rotation and the lifting of jet pipe, water under high pressure mud jet cutting destroys the soil body, and the energy simultaneously starching jet is comparatively large, cement paste and clay is mixed and stirs formation pile body; Compressed gas also plays and rises the effect of displacement of raising, and the part soil body of cutting is emerged from aperture, after cement paste and soil body mixture consolidation, and reinforcing body required for being formed.
In order to implement process to foundation ditch " water burst, gush sand " accident effectively in an orderly manner, " water burst, gush sand " degree is avoided to expand to greatest extent, make every effort to timely prevention " Sand " phenomenon, reduce the subsequent construction pressure of excavation of foundation pit, event harm is dropped to minimum point, proposes a kind of deep foundation ditch underground continuous wall-enclosure structure and rotary churning pile water stopping construction method thereof.
[summary of the invention]
The object of the invention is to: for defect and the deficiency of prior art, provide a kind of deep foundation ditch underground continuous wall-enclosure structure and rotary churning pile water stopping construction method thereof, this space enclosing structure and rotary churning pile water stopping construction method, while the carrying out smoothly of base pit engineering can be ensured, when there is piping in continuous metope, carrying out shutoff and process timely, ensure that the person and the property safety of constructor, is the technical guarantee carrying out providing necessity smoothly of constructing.
For achieving the above object, the technical solution used in the present invention is:
A kind of deep foundation ditch underground continuous wall-enclosure structure, it is characterized in that: comprise diaphragm wall, leakage point, shutoff steel plate and water conservancy diversion steel pipe, adhere on diaphragm wall face with shutoff steel plate, and with expansion bolt by the Corner Strapped of shutoff steel plate on diaphragm wall, leakage point and water conservancy diversion steel pipe just right, water conservancy diversion steel pipe is provided with valve, carries out edge sealing with edging material along the gap in shutoff steel plate and diaphragm wall face simultaneously.
In the present invention: a kind of rotary churning pile water stopping construction method of deep foundation ditch diaphragm wall, comprises the following steps:
(1), location: after surveying setting-out, mobile geological drilling rig, to finger fixed pile, first makes boring reach design verticality, then does level correction, makes its drill rod axis aim at drill center position;
(2), guide hole is bored: after driller insertion, open drill hole of drilling machine, ensure that drill hole of drilling machine position and design attitude deviation are not more than 20mm, whole Kong Houyong sand pocket clogs aperture, to prevent foreign material from falling in hole, ensures that job site is dry, before drilling construction, according to the axis of rotary churning pile, the mud ditch of an excavation 350 × 350mm, prevents the overflow everywhere of mud or waste pulp;
(3), churning pile-forming machine perching: after guide hole pore-forming terminates, rotary churning pile machine is placed on drilling pile position, make center, bit central mating holes position, contraposition deviation more than 20mm, must not guarantee that final pile position deviation must not be greater than 50mm, by spirit level adjustment stake machine level and slip casting verticality, guarantee into pile verticality and be not more than 1%, by rotary churning pile core pipe patchhole, in catheterization procedure, for preventing silt blocking nozzle, can limit jetting, limit intubate;
(4), jet groutinl: special rotary jetting apparatus is provided with adjustable rotary and Hoisting System, after rotary jetting apparatus Installation and Debugging in place complete, is inserted to by playpipe at the bottom of hole, starts mortar pumping slurry, returns after slurry undertaken penetrating slurry by the technical data of schematic design until aperture;
(5), rotary lifting: after slip casting, promote with the technical data that rotary jetting apparatus returns by schematic design after slurry until aperture, hoisting velocity 0.10 ~ 0.20m/min, rotary speed 10 ~ 25r/min;
(6), pile: rotary churning pile diameter is 0.8m, and pitch-row is 600mm, and rotary churning pile adopts strength grade to be 42.5 grades and above Portland cement and water/binder ratio 1:1;
(7), recharge: at slurries AEI After End of Injection, in spray-hole, carry out static pressure fill grouting, until slurry face no longer sinks;
(8) single pile completes.
After adopting said method, beneficial effect of the present invention is: this space enclosing structure and rotary churning pile water stopping construction method, while the carrying out smoothly of base pit engineering can be ensured, when there is piping in continuous metope, carry out shutoff and process timely, ensure that the person and the property safety of constructor, is the technical guarantee carrying out providing necessity smoothly of constructing.
[accompanying drawing explanation]
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part, but does not form inappropriate limitation of the present invention, in the accompanying drawings:
Fig. 1 is the lateral view of space enclosing structure in the present invention;
Fig. 2 is the elevation of space enclosing structure in the present invention;
Fig. 3 is the schematic flow sheet of the rotary churning pile water stopping construction method in the present invention.
In figure: 1. diaphragm wall; 2. edging material; 3. expansion bolt; 4. leakage point; 5. valve; 6. water conservancy diversion steel pipe; 7. shutoff steel plate.
[detailed description of the invention]
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, illustrative examples wherein and explanation are only used for explaining the present invention, but not as a limitation of the invention.
As shown in Figure 1-2, a kind of deep foundation ditch underground continuous wall-enclosure structure, comprise diaphragm wall 1, leakage point 4, shutoff steel plate 7 and water conservancy diversion steel pipe 6, adhere on diaphragm wall 1 with shutoff steel plate 7, and with expansion bolt 3 by the Corner Strapped of shutoff steel plate 7 on diaphragm wall 1, leakage point 4 is just right with water conservancy diversion steel pipe 6, and water conservancy diversion steel pipe 6 is provided with valve 5, carries out edge sealing with the edging material 2 that cotton sand and grease material mix along the gap of shutoff steel plate 7 and diaphragm wall 1 simultaneously.
A rotary churning pile water stopping construction method for deep foundation ditch diaphragm wall, comprises the following steps:
(1), location: after surveying setting-out, mobile geological drilling rig, to finger fixed pile, first makes boring reach design verticality, then does level correction, makes its drill rod axis aim at drill center position;
(2), guide hole is bored: after driller insertion, open drill hole of drilling machine, ensure that drill hole of drilling machine position and design attitude deviation are not more than 20mm, whole Kong Houyong sand pocket clogs aperture, to prevent foreign material from falling in hole, ensures that job site is dry, before drilling construction, according to the axis of rotary churning pile, the mud ditch of an excavation 350 × 350mm, prevents the overflow everywhere of mud or waste pulp;
(3), churning pile-forming machine perching: after guide hole pore-forming terminates, rotary churning pile machine is placed on drilling pile position, make center, bit central mating holes position, contraposition deviation more than 20mm, must not guarantee that final pile position deviation must not be greater than 50mm, by spirit level adjustment stake machine level and slip casting verticality, guarantee into pile verticality and be not more than 1%, by rotary churning pile core pipe patchhole, in catheterization procedure, for preventing silt blocking nozzle, can limit jetting, limit intubate;
(4), jet groutinl: special rotary jetting apparatus is provided with adjustable rotary and Hoisting System, after rotary jetting apparatus Installation and Debugging in place complete, is inserted to by playpipe at the bottom of hole, starts mortar pumping slurry, returns after slurry undertaken penetrating slurry by the technical data of schematic design until aperture;
(5), rotary lifting: after slip casting, promote with the technical data that rotary jetting apparatus returns by schematic design after slurry until aperture, hoisting velocity 0.10 ~ 0.20m/min, rotary speed 10 ~ 25r/min;
(6), pile: rotary churning pile diameter is 0.8m, and pitch-row is 600mm, and rotary churning pile adopts strength grade to be 42.5 grades and above Portland cement and water/binder ratio 1:1;
(7), recharge: at slurries AEI After End of Injection, in spray-hole, carry out static pressure fill grouting, until slurry face no longer sinks;
(8) single pile completes.
The above is only better embodiment of the present invention, therefore all equivalences done according to structure, feature and the principle described in patent claim of the present invention change or modify, and are included in patent claim of the present invention.
Claims (2)
1. a deep foundation ditch underground continuous wall-enclosure structure, it is characterized in that: comprise diaphragm wall, leakage point, shutoff steel plate and water conservancy diversion steel pipe, adhere on diaphragm wall face with shutoff steel plate, and with expansion bolt by the Corner Strapped of shutoff steel plate on diaphragm wall, leakage point and water conservancy diversion steel pipe just right, water conservancy diversion steel pipe is provided with valve, carries out edge sealing with edging material along the gap in shutoff steel plate and diaphragm wall face simultaneously.
2. a rotary churning pile water stopping construction method for deep foundation ditch diaphragm wall, is characterized in that: comprise the following steps:
(1), location: after surveying setting-out, mobile geological drilling rig, to finger fixed pile, first makes boring reach design verticality, then does level correction, makes its drill rod axis aim at drill center position;
(2), guide hole is bored: after driller insertion, open drill hole of drilling machine, ensure that drill hole of drilling machine position and design attitude deviation are not more than 20mm, whole Kong Houyong sand pocket clogs aperture, to prevent foreign material from falling in hole, ensures that job site is dry, before drilling construction, according to the axis of rotary churning pile, the mud ditch of an excavation 350 × 350mm, prevents the overflow everywhere of mud or waste pulp;
(3), churning pile-forming machine perching: after guide hole pore-forming terminates, rotary churning pile machine is placed on drilling pile position, make center, bit central mating holes position, contraposition deviation more than 20mm, must not guarantee that final pile position deviation must not be greater than 50mm, by spirit level adjustment stake machine level and slip casting verticality, guarantee into pile verticality and be not more than 1%, by rotary churning pile core pipe patchhole, in catheterization procedure, for preventing silt blocking nozzle, can limit jetting, limit intubate;
(4), jet groutinl: special rotary jetting apparatus is provided with adjustable rotary and Hoisting System, after rotary jetting apparatus Installation and Debugging in place complete, is inserted to by playpipe at the bottom of hole, starts mortar pumping slurry, returns after slurry undertaken penetrating slurry by the technical data of schematic design until aperture;
(5), rotary lifting: after slip casting, promote with the technical data that rotary jetting apparatus returns by schematic design after slurry until aperture, hoisting velocity 0.10 ~ 0.20m/min, rotary speed 10 ~ 25r/min;
(6), pile: rotary churning pile diameter is 0.8m, and pitch-row is 600mm, and rotary churning pile adopts strength grade to be 42.5 grades and above Portland cement and water/binder ratio 1:1;
(7), recharge: at slurries AEI After End of Injection, in spray-hole, carry out static pressure fill grouting, until slurry face no longer sinks;
(8) single pile completes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510351859.1A CN104929135A (en) | 2015-06-24 | 2015-06-24 | Deep foundation pit underground diaphragm wall enclosure structure and chemical churning pile water stop construction method thereof |
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| CN201510351859.1A CN104929135A (en) | 2015-06-24 | 2015-06-24 | Deep foundation pit underground diaphragm wall enclosure structure and chemical churning pile water stop construction method thereof |
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Cited By (7)
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| CN105297743A (en) * | 2015-11-03 | 2016-02-03 | 中国电建集团华东勘测设计研究院有限公司 | Diaphragm wall defect leakage water stop and drainage structure and construction method thereof |
| CN109707057A (en) * | 2019-01-24 | 2019-05-03 | 四汇建设集团有限公司 | The plugging structure and its construction method of Basement Main Wall Crack infiltration |
| CN111827260A (en) * | 2020-07-17 | 2020-10-27 | 中铁六局集团有限公司 | Defect repairing and leaking stoppage construction method for underground diaphragm wall |
| CN113089655A (en) * | 2021-04-08 | 2021-07-09 | 启东建筑集团有限公司 | Construction method in three-pipe rotary spraying pile pit in flowing water environment |
| CN114293559A (en) * | 2021-12-23 | 2022-04-08 | 上海市机械施工集团有限公司 | Horizontal MJS construction method |
| CN114855842A (en) * | 2022-05-25 | 2022-08-05 | 中国建筑一局(集团)有限公司 | Device and method for rapidly plugging serious leakage of underground diaphragm wall |
| CN115369917A (en) * | 2022-09-23 | 2022-11-22 | 中铁七局集团西安铁路工程有限公司 | Cover digs contrary subway station waterproof construction that does of doing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297743A (en) * | 2015-11-03 | 2016-02-03 | 中国电建集团华东勘测设计研究院有限公司 | Diaphragm wall defect leakage water stop and drainage structure and construction method thereof |
| CN105297743B (en) * | 2015-11-03 | 2017-09-29 | 中国电建集团华东勘测设计研究院有限公司 | A kind of ground-connecting-wall defect seepage stops discharge structure and its construction method |
| CN109707057A (en) * | 2019-01-24 | 2019-05-03 | 四汇建设集团有限公司 | The plugging structure and its construction method of Basement Main Wall Crack infiltration |
| CN111827260A (en) * | 2020-07-17 | 2020-10-27 | 中铁六局集团有限公司 | Defect repairing and leaking stoppage construction method for underground diaphragm wall |
| CN113089655A (en) * | 2021-04-08 | 2021-07-09 | 启东建筑集团有限公司 | Construction method in three-pipe rotary spraying pile pit in flowing water environment |
| CN114293559A (en) * | 2021-12-23 | 2022-04-08 | 上海市机械施工集团有限公司 | Horizontal MJS construction method |
| CN114855842A (en) * | 2022-05-25 | 2022-08-05 | 中国建筑一局(集团)有限公司 | Device and method for rapidly plugging serious leakage of underground diaphragm wall |
| CN115369917A (en) * | 2022-09-23 | 2022-11-22 | 中铁七局集团西安铁路工程有限公司 | Cover digs contrary subway station waterproof construction that does of doing |
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Application publication date: 20150923 |
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