CN104452776A - Construction treatment method for underground diaphragm wall meeting with boulders - Google Patents
Construction treatment method for underground diaphragm wall meeting with boulders Download PDFInfo
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- CN104452776A CN104452776A CN201410661234.0A CN201410661234A CN104452776A CN 104452776 A CN104452776 A CN 104452776A CN 201410661234 A CN201410661234 A CN 201410661234A CN 104452776 A CN104452776 A CN 104452776A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
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- Mining & Mineral Resources (AREA)
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Abstract
The invention relates to a construction treatment method for an underground diaphragm wall meeting with boulders. The construction treatment method is characterized by comprising the construction steps of wall guidance, mud protection, grooving construction and concrete pouring. In the diaphragm wall grooving construction process, when the diaphragm wall meets with boulders, according to the processing scheme, the number of grooving machines, the number of percussion drills and the number of geological drilling rigs are increased so that work efficiency can be improved; or, a geological drilling rig advance borehole is utilized for guiding first-open-width selection after detecting the boulders, so that the boulder effect degree is reduced; or, when the diaphragm wall meeting with the boulders, the grooving machine can be used for direct grabbing; or the percussion drill is utilized for first percussion; or, deep hole blasting is adopted for breaking and cutting the boulders or rock, and the percussion drill is used for conducting percussion again; or a full-rotation casing pipe drilling machine is adopted for treatment, and the full-rotation casing pipe drilling machine can be adopted for follow-up and high-frequency percussion for remaining boulders which cannot be treated by deep hole blasting and the percussion drill.
Description
technical field:
The present invention relates to a kind of one construction Treatment Methods of diaphragm wall when meeting with boulder.
background technology:
Diaphragm wall is that Foundation Design adopts a kind of trench machine on the ground, along the periphery axis of deep excavation project, under mud off condition, excavate out a long and narrow deep trouth, after clear groove, install reinforcing cage in groove, then a unit groove section is built up with tremie method underwater concreting with tremie method, so carry out piecemeal, build up one continuous print steel concrete wall in underground, as intercepting water, antiseepage, load-bearing, water-retaining structure.The construction method feature of diaphragm wall is: Construction Vibration is little, wall stiffness is large, good integrity, speed of application is fast, the cubic metre of earth and stone can be economized, can be used for building deep foundation pit support in intensive building and carrying out reverse construction, can be used for comprising in the sandy gravel stratum of sandy soil layer, below particle diameter 50mm and construct.Be applicable to the basement of construction of buildings, underground store, parking lot, oil cellar, retaining wall, the deep foundation of highrise building, reverse construction space enclosing structure, the dark pond of industrial construction, hole; Vertical shaft etc.
But in practice of construction process, during continuous wall trench underground construction, often can run into boulder, these boulders can affect construction speed greatly, increase construction cost.
summary of the invention:
The object of the present invention is to provide a kind of one construction Treatment Methods of diaphragm wall when meeting with boulder, during this experience boulder, the one construction Treatment Methods of diaphragm wall is reasonable in design, and the boulder be conducive to for different shape effectively processes.
The one construction Treatment Methods of diaphragm wall when the present invention meets with boulder, construction sequence includes: lead wall, mud off, trenching construction and concrete perfusion, it is characterized in that, when the processing scheme running into boulder in continuous wall trench work progress:
1., the quantity of groover, Churn drill and geological drilling rig is increased, to improve work efficiency;
Or utilize geological drilling rig advance borehole 2., after verifying boulder, instruct the selection first opening width, reduce boulder influence degree;
Or may be configured as scouring machine when running into little boulder and directly capture 3.;
Or utilize the leading shock treatment of percussive drill 4.;
5. or adopt that deep hole blasting is broken, after segmentation boulder or rock, Churn drill is shock treatment again;
Or adopt full-rotating drill process 6.; For the residue boulder that deep hole blasting, Churn drill all cannot process, full-rotating drill follow-up, block stamp high-frequency percussion process can be adopted.
Further, 2. above-mentioned utilize geological drilling rig advance borehole, the selection first opening width is instructed after verifying boulder, diaphragm wall can be divided into 3 kinds of width sections according to sequence of construction, namely first open width, connect width, close width, if if run into boulder after first opening width grooving, take backfill measure after adopting percussive drill shock treatment or Churn drill to process, 2 adjacent connection width are all directly influenced and cannot construct; As a same reason, if 1 connects width and runs into boulder, take backfill measure after adopting percussive drill shock treatment or Churn drill to process, 1 adjacent connection width or closed width are directly affected and cannot construct; First utilize geological drilling rig to carry out advance borehole to each width ground-connecting-wall for this reason, the existence verifying boulder whether with the size of preliminary judgement boulder, instruct and first open the selection of width and the selection of huge stone handling scheme, effectively reduce the influence degree of boulder, then accelerate ground-connecting-wall construction progress; Geological drilling rig advance borehole cloth hole principle: 3/width, spacing 2 meters, at the bottom of hole depth to ground-connecting-wall wall, runs into boulder and namely installs pvc pipe, for next step deep hole blasting creates conditions.
Further, above-mentioned 3. may be configured as scouring machine when running into little boulder and directly capture; According to advance geologic results of drilling, for the little boulder of diameter less than 0.8 meter, groover is adopted directly to construct, this type of little boulder of major part can directly capture, but also run into boulder off normal, the strange boulder of shape be difficult to capture phenomenon, small part be difficult to capture little boulder can carry out huge stone handling step below.
Further, above-mentioned the leading shock treatment of percussive drill is 4. utilized; Huge stone handling adopts the leading shock treatment of Churn drill of advantage of lower cost, to full capacity the little boulder that cannot capture, large boulder, basement rock projection, cataclastic shape strong-weathered rock are impacted, be aided with backfill slabstone, rubble, geological drilling rig flank hole, off normal, inclination boulder are processed.
Further, above-mentioned the 5. adopt that deep hole blasting is broken, after segmentation boulder or rock, Churn drill shock treatment again; For the residue boulder that Churn drill cannot process, adopt geological drilling rig encryption to arrange big gun hole, utilize deep hole blasting to carry out fragmentation, segmentation, disintegration to boulder, auxiliary impact bores shock treatment again; First by geological drilling rig encryption probing, verify the size of boulder, situation further, need backfill the groove section excavated, then by geological drilling rig, rock holed, install pvc pipe, the spacing of wells 0.5 ~ 1 meter, part off normal boulder need lead 0.5 ~ 1 meter of scope boring outside wall, and finally adopt the mode such as pvc pipe or bamboo chip pincer attack that explosive is placed in rock assigned address from earth's surface, the energy utilizing explosive charge to produce is by catalase, segmentation, disintegration.
Further, above-mentioned wall of leading is the benchmark controlling diaphragm wall indices, it plays the supporting notch soil body, accurate location, bear the effect of ground load and stable mud liquid level, lead wall and make " ┓ ┏ " shape monolithic reinforced concrete structure, lead wall channel excavation and adopt mini-excavator excavation, the hand fit clear end, after substrate compacting, lay 7 cm thick 1:3 cement mortars, concreting adopts wooden form and wood to support, when leading the reinforced concrete construction of wall, (1) will lead center line of wall after leading wall channel excavation immediately causes in groove, Control architecture is constructed, (2) lead wall main muscle Ф 12 screw-thread steel, rebar spacing presses 150mm arrangement, and horizontal reinforcement is placed in inner side and adopts φ 8 round steel, and rebar spacing presses 200mm arrangement, (3) guide wall form board adopts wooden form, and longitudinally establish 4 road steel pipe supports to reinforce, spacing 30cm, establishes one steel pipe support along the every 1m of short transverse, plate is reinforced firmly, is strictly on guard against race mould, and ensures the accurate of axis and headroom, is not more than 5mm along center line direction left-right deviation, (4) both sides cloth symmetrically and evenly during pouring concrete, 50cm vibrates once, and with surperficial bleeding, concrete surface does not sink to being as the criterion, and test specimen one group is stayed in each cast, (5) form removal after the complete 12h of pouring concrete, joint dabbing, covers geotextiles, and watering health is no less than 7d.
Further, the mud in above-mentioned mud off adopts bentonite slurry, and mud match ratio is as follows: every cubic metre of mud materials consumption Kg, swell soil: 70, soda ash: 1.8, water: 1000, CMC:0.8; During slurrying, first prepare CMC solution left standstill 5 hours, add water in mixing drum by match ratio, add swell soil, stir after 3 minutes, then add CMC solution, stir 10 minutes, add soda ash again, after stirring, put into pulp storage tank, after 24 hours, the abundant hydration swelling of bentonite clay particle, can pump into circulatory pool, in order to using.
The present invention is come by single process boulder scheme or multiple process boulder scheme and is used, to make in work progress no matter in the face of which kind of boulder, all have the solution of corresponding scheme, reasonable effective method has been formulated in the process for boulder, those schematic designs are reasonable, simply effectively.
accompanying drawing illustrates:
fig. 1 is the top view of diaphragm wall of the present invention;
Fig. 2 is that diaphragm wall of the present invention has the top view of leading wall;
Fig. 3 is the A-A sectional drawing of Fig. 2;
Wherein 1 is diaphragm wall, and 2 is boulders, and 3 is lead wall.
detailed description of the invention:
The one construction Treatment Methods of diaphragm wall when the present invention meets with boulder, construction sequence includes: lead wall 3, mud off, trenching construction and concrete perfusion, when the processing scheme running into boulder in continuous wall trench work progress:
1., the quantity of groover, Churn drill and geological drilling rig is increased, to improve work efficiency;
Or utilize geological drilling rig advance borehole 2., after verifying boulder, instruct the selection first opening width, reduce boulder influence degree;
Or may be configured as scouring machine when running into little boulder and directly capture 3.;
Or utilize the leading shock treatment of percussive drill 4.;
5. or adopt that deep hole blasting is broken, after segmentation boulder or rock, Churn drill is shock treatment again;
Or adopt the process of full convolution drill machine with casing 6.; For the residue boulder that deep hole blasting, Churn drill all cannot process, the follow-up of full convolution drill machine with casing, high-frequency percussion process can be adopted.
Further, 2. above-mentioned utilize geological drilling rig advance borehole, the selection first opening width is instructed after verifying boulder, diaphragm wall can be divided into 3 kinds of width sections according to sequence of construction, namely first open width, connect width, close width, if if run into boulder after first opening width grooving, take backfill measure after adopting percussive drill shock treatment or Churn drill to process, 2 adjacent connection width are all directly influenced and cannot construct; As a same reason, if 1 connects width and runs into boulder, take backfill measure after adopting percussive drill shock treatment or Churn drill to process, 1 adjacent connection width or closed width are directly affected and cannot construct; First utilize geological drilling rig to carry out advance borehole to each width ground-connecting-wall for this reason, the existence verifying boulder whether with the size of preliminary judgement boulder, instruct and first open the selection of width and the selection of huge stone handling scheme, effectively reduce the influence degree of boulder, then accelerate ground-connecting-wall construction progress; Geological drilling rig advance borehole cloth hole principle: 3/width, spacing 2 meters, at the bottom of hole depth to ground-connecting-wall wall, runs into boulder and namely installs pvc pipe, for next step deep hole blasting creates conditions.
Further, above-mentioned 3. may be configured as scouring machine when running into little boulder and directly capture; According to advance geologic results of drilling, for the little boulder of diameter less than 0.8 meter, groover is adopted directly to construct, this type of little boulder of major part can directly capture, but also run into boulder off normal, the strange boulder of shape be difficult to capture phenomenon, small part be difficult to capture little boulder can carry out huge stone handling step below.
Further, above-mentioned the leading shock treatment of percussive drill is 4. utilized; Huge stone handling adopts the leading shock treatment of Churn drill of advantage of lower cost, to full capacity the little boulder that cannot capture, large boulder, basement rock projection, cataclastic shape strong-weathered rock are impacted, be aided with backfill slabstone, rubble, geological drilling rig flank hole, off normal, inclination boulder are processed.
Further, above-mentioned the 5. adopt that deep hole blasting is broken, after segmentation boulder or rock, Churn drill shock treatment again; For the residue boulder that Churn drill cannot process, adopt geological drilling rig encryption to arrange big gun hole, utilize deep hole blasting to carry out fragmentation, segmentation, disintegration to boulder, auxiliary impact bores shock treatment again; First by geological drilling rig encryption probing, verify the size of boulder, situation further, need backfill the groove section excavated, then by geological drilling rig, rock holed, install pvc pipe, the spacing of wells 0.5 ~ 1 meter, part off normal boulder need lead 0.5 ~ 1 meter of scope boring outside wall, and finally adopt the mode of pvc pipe or bamboo chip pincer attack that explosive is placed in rock assigned address from earth's surface, the energy utilizing explosive charge to produce is by catalase, segmentation, disintegration.
Further, above-mentioned wall of leading is the benchmark controlling diaphragm wall indices, it plays the supporting notch soil body, bear the effect of ground load and stable mud liquid level, lead wall and make " ┓ ┏ " shape monolithic reinforced concrete structure, lead wall channel excavation and adopt mini-excavator excavation, the hand fit clear end, after substrate compacting, lay 7 cm thick 1:3 cement mortars, concreting adopts wooden form and wood to support, when leading the reinforced concrete construction of wall, (1) will lead center line of wall after leading wall channel excavation immediately causes in groove, and Control architecture is constructed; (2) lead wall main muscle Ф 12 screw-thread steel, rebar spacing presses 150mm arrangement, and horizontal reinforcement is placed in inner side and adopts φ 8 round steel, and rebar spacing presses 200mm arrangement; (3) guide wall form board adopts wooden form, and longitudinally establish 4 road steel pipe supports to reinforce, spacing 30cm, establishes one steel pipe support along the every 1m of short transverse; Plate is reinforced firmly, is strictly on guard against race mould, and ensures the accurate of axis and headroom, is not more than 5mm along center line direction left-right deviation; (4) both sides cloth symmetrically and evenly during pouring concrete, 50cm vibrates once, and with surperficial bleeding, concrete surface does not sink to being as the criterion, and test specimen one group is stayed in each cast; (5) form removal after the complete 12h of pouring concrete, joint dabbing, covers geotextiles, and watering health is no less than 7d.
Further, the mud in above-mentioned mud off adopts bentonite slurry, and mud match ratio is as follows: every cubic metre of mud materials consumption Kg, swell soil: 70, soda ash: 1.8, water: 1000, CMC:0.8; During slurrying, first prepare CMC solution left standstill 5 hours, add water in mixing drum by match ratio, add swell soil, stir after 3 minutes, then add CMC solution, stir 10 minutes, add soda ash again, after stirring, put into pulp storage tank, after 24 hours, the abundant hydration swelling of bentonite clay particle, can pump into circulatory pool, in order to using.
The present invention is come by single process boulder scheme or multiple process boulder scheme and is used, to make in work progress no matter in the face of which kind of boulder, all have the solution of corresponding scheme, reasonable effective method has been formulated in the process for boulder, those schematic designs are reasonable, simply effectively.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (7)
1. the one construction Treatment Methods of diaphragm wall when meeting with boulder, construction sequence includes: lead wall, mud off, trenching construction, the preparation of reinforcing cage processing and fabricating and install reinforcing cage and concrete perfusion, it is characterized in that, when the processing scheme running into boulder in continuous wall trench work progress:
1., the quantity of groover, Churn drill and geological drilling rig is increased, to improve the work efficiency of boulder detection and process;
Or utilize geological drilling rig advance borehole 2., after verifying boulder, instruct the selection first opening width, reduce boulder influence degree;
Or may be configured as scouring machine when running into little boulder and directly capture 3.;
Or utilize the leading shock treatment of percussive drill 4.;
5. or adopt that deep hole blasting is broken, after segmentation boulder or rock, Churn drill is shock treatment again;
Or adopt full-rotating drill process 6.; For the residue boulder that deep hole blasting, Churn drill all cannot process, full-rotating drill follow-up, block stamp high-frequency percussion process can be adopted.
2. meet with the one construction Treatment Methods of diaphragm wall during boulder according to claim 1, it is characterized in that, 2. described utilize geological drilling rig advance borehole, the selection first opening width is instructed after verifying boulder, diaphragm wall can be divided into 3 kinds of width sections according to sequence of construction, namely first open width, connect width, close width, if run into boulder after first opening width grooving, take backfill measure after adopting percussive drill shock treatment or Churn drill to process, 2 adjacent connection width are all directly influenced and cannot construct; As a same reason, if 1 connects width and runs into boulder, take backfill measure after adopting percussive drill shock treatment or Churn drill to process, 1 adjacent connection width or closed width are directly affected and cannot construct; First utilize geological drilling rig to carry out advance borehole to each width ground-connecting-wall for this reason, the existence verifying boulder whether with the size of preliminary judgement boulder, instruct and first open the selection of width and the selection of huge stone handling scheme, effectively reduce the influence degree of boulder, then accelerate ground-connecting-wall construction progress; Geological drilling rig advance borehole cloth hole principle: 3/width, spacing 2 meters, at the bottom of hole depth to ground-connecting-wall wall, runs into boulder and namely installs pvc pipe, for next step deep hole blasting creates conditions.
3. meet with the one construction Treatment Methods of diaphragm wall during boulder according to claim 1, it is characterized in that, 3. described the may be configured as scouring machine directly captures when running into little boulder; According to advance geologic results of drilling, for the little boulder of diameter less than 0.8 meter, groover is adopted directly to construct, this type of little boulder of major part can directly capture, but also run into boulder off normal, the strange boulder of shape be difficult to capture phenomenon, small part be difficult to capture little boulder can carry out huge stone handling step below.
4. meet with the one construction Treatment Methods of diaphragm wall during boulder according to claim 1, it is characterized in that, 4. described the utilize the leading shock treatment of percussive drill; Huge stone handling adopts the leading shock treatment of Churn drill of advantage of lower cost, to full capacity the little boulder that cannot capture, large boulder, basement rock projection, cataclastic shape strong-weathered rock are impacted, be aided with backfill slabstone, rubble, geological drilling rig flank hole, off normal, inclination boulder are processed.
5. meet with the one construction Treatment Methods of diaphragm wall during boulder according to claim 1, it is characterized in that, described the 5. adopt deep hole blasting broken, split boulder or rock after, Churn drill shock treatment again; For the residue boulder that Churn drill cannot process, adopt geological drilling rig encryption to arrange big gun hole, utilize deep hole blasting to carry out fragmentation, segmentation, disintegration to boulder, auxiliary impact bores shock treatment again; First by geological drilling rig encryption probing, verify the size of boulder, situation further, need backfill the groove section excavated, then by geological drilling rig, rock holed, install pvc pipe, the spacing of wells 0.5 ~ 1 meter, part off normal boulder need lead 0.5 ~ 1 meter of scope boring outside wall, and finally utilize the mode of pvc pipe or bamboo chip pincer attack that explosive is placed in rock assigned address from earth's surface, the energy utilizing explosive charge to produce is by catalase, segmentation, disintegration.
6. meet with the one construction Treatment Methods of diaphragm wall during boulder according to claim 1, it is characterized in that, leading wall is the benchmark controlling diaphragm wall indices, it plays the supporting notch soil body, accurate location, bear the effect of ground machine equipment load and stable mud liquid level, lead wall and make " ┓ ┏ " shape monolithic reinforced concrete structure, lead wall channel excavation and adopt mini-excavator excavation, the hand fit clear end, after substrate compacting, lay 7 cm thick 1:3 cement mortars, concreting adopts wooden form and wood to support, when leading the reinforced concrete construction of wall, (1) will lead center line of wall after leading wall channel excavation immediately causes in groove, Control architecture is constructed, (2) lead wall main muscle Ф 12 screw-thread steel, rebar spacing presses 150mm arrangement, and horizontal reinforcement is placed in inner side and adopts φ 8 round steel, and rebar spacing presses 200mm arrangement, (3) guide wall form board adopts wooden form, and longitudinally establish 4 road steel pipe supports to reinforce, spacing 30cm, establishes one steel pipe support along the every 1m of short transverse, formwork reinforcement is firm, is strictly on guard against race mould, and ensures the accurate of axis and headroom, is not more than 5mm along center line direction left-right deviation, (4) both sides cloth symmetrically and evenly during pouring concrete, 50cm is thick to vibrate once, does not sink to being as the criterion with surperficial bleeding, concrete surface, and test specimen one group is stayed in each cast, (5) form removal after the complete 12h of pouring concrete, joint dabbing, covers geotextiles, and watering health is no less than 7d.
7. meet with the one construction Treatment Methods of diaphragm wall during boulder according to claim 1, it is characterized in that, mud in described mud off adopts bentonite slurry, mud match ratio is as follows: every cubic metre of mud materials consumption Kg, swell soil: 70, soda ash: 1.8, water: 1000, CMC:0.8; During slurrying, first prepare CMC solution left standstill 5 hours, add water in mixing drum by match ratio, add swell soil, stir after 3 minutes, then add CMC solution, stir 10 minutes, add soda ash again, after stirring, put into pulp storage tank, after 24 hours, the abundant hydration swelling of bentonite clay particle, can pump into circulatory pool, in order to using.
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| CN201410661234.0A CN104452776B (en) | 2014-11-19 | 2014-11-19 | Meet with the one construction Treatment Methods of diaphragm wall during boulder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604553A (en) * | 2015-12-21 | 2016-05-25 | 上海市基础工程集团有限公司 | Construction method for exploration and treatment of shield driving complex formation boulders |
| CN110644439A (en) * | 2019-10-12 | 2020-01-03 | 中国水电基础局有限公司 | Method for quickly forming barrier body impervious wall |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306530A (en) * | 2019-07-05 | 2019-10-08 | 广州穗岩土木科技股份有限公司 | The construction Treatment Methods of diaphram wall when a kind of experience boulder |
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| CN110644439A (en) * | 2019-10-12 | 2020-01-03 | 中国水电基础局有限公司 | Method for quickly forming barrier body impervious wall |
| CN110644439B (en) * | 2019-10-12 | 2020-07-31 | 中国水电基础局有限公司 | Method for quickly forming barrier body impervious wall |
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| Publication number | Publication date |
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| CN104452776B (en) | 2016-02-17 |
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