CN109098197A - One kind being based on mud jackstone stratum water gushing in pit emergency processing construction method - Google Patents
One kind being based on mud jackstone stratum water gushing in pit emergency processing construction method Download PDFInfo
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- CN109098197A CN109098197A CN201811025825.3A CN201811025825A CN109098197A CN 109098197 A CN109098197 A CN 109098197A CN 201811025825 A CN201811025825 A CN 201811025825A CN 109098197 A CN109098197 A CN 109098197A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
Abstract
The invention discloses one kind to be based on mud jackstone stratum water gushing in pit emergency processing construction method, including step 1: closing power supply, personnel withdraw from；Step 2: gushing water back-pressure；Step 3: gushing water drainage；Step 4: projective water point is reinforced；Step 5: drilling whitewashing；Step 6: gushing water scene is monitored.The present invention can handle water gushing in pit accident in time, foundation pit is avoided to collapse, the present invention can reduce the personnel depaly of redundancy, keep the configuration in each post more reasonable, material allocation is more reasonable, save the cost, and the present invention is conducive to fill up the blank of gushing water emergency rescue technology, the emergency rescue technology that can be improved the accidents such as the gushing water being likely encountered in Excavation Process enables foundation pit to organize most effective rescue when encountering emergency case in process of construction.
Description
Technical field
The present invention relates to technical field of building construction, in particular to a kind of prominent based on mud jackstone stratum foundation pit
Water emergency processing construction method.
Background technique
Subway construction is in a fast-developing period, and during Construction of Deep Excavation Engineering, it inevitably can be to surrounding
The soil body has a different degrees of disturbance, and a great influence shows as causing that peripheral ground is uneven, sinks, to build around influencing
It builds, the normal use of structures and underground utilities, causes serious engineering accident.
Carrying out excavation of foundation pit mainly in reclaimation area mud jackstone stratum includes from geology and construction aspect bring
Risk.Geologic risk is primarily referred to as including plain fill, the ingredients such as muck soil, geology item in reclaimation area mud geology jackstone stratum
Part is complicated, the soft or hard unevenness of plain fill, belongs to the more unstable soil body, easily causes foundation pit partial collapse, differential settlement, grooving collapse hole.
The features such as muck soil has void ratio big, and compressibility is high, and shearing strength is low, tool thixotropy, rheological characteristic and inhomogeneities, belongs to not
Stablize the soil body, easily causes lateral sliding, surface subsidence, the risks such as instability of foundation pit.
Foundation pit is under reclaimation area mud jackstone formation condition, and engineering specifications is very special, for the ground of reclaimation area complexity
Matter condition, the easy hair catastrophe of weight analysis foundation pit in the construction process, and in various foundation pit catastrophes, water gushing in pit
Accident occupies very big ratio, and water gushing in pit accident once occurs, if effectively being controlled not in time, brought by
Subsequent accident is just inestimable, and collapsing for foundation pit but will be caused when serious, surrounding buildings settlement is caused even to collapse, is caused
Huge casualties and economic asset loss, consequence are extremely serious.
Drawbacks described above is worth solving.
Summary of the invention
In order to overcome the shortcomings of that existing technology, the present invention provide a kind of based at the water gushing in pit emergency of mud jackstone stratum
Manage construction method.
Technical solution of the present invention is as described below:
One kind being based on mud jackstone stratum water gushing in pit emergency processing construction method, comprising the following steps:
Step 1: closing power supply, personnel withdraw from, and the power supply of all devices in foundation pit are closed, and withdraw from full complement and set
It is standby；
Step 2: back-pressure platform is arranged in projective water point in gushing water back-pressure；
Step 3: gushing water drainage carries out gushing water drainage when water gushing in pit streamflow is smaller；
Step 4: projective water point is reinforced, and is reinforced to projective water point region, forms mesh reinforcement to gushing water position using angle steel, and hang
Net spray shield concrete；
Step 5: drilling whitewashing, along water-stop curtain axis direction right above projective water point, bored grouting will be certain near projective water point
Region forms enclosure space；
Step 6: monitoring is monitored gushing water scene.
Further, the step 5 the following steps are included:
Step 51: preparation of construction is changed the reinforcing scope soil body using brachium 10m backhoe excavation fill out plain soil first, then by two-tube height
Then a complete set of equipment needed for pressure rotary-spraying mortar depositing construction and ancillary equipment are divided by construction site situation progress reasonable Arrangement, installation
Not Jian Cha gas, slurry the two big various equipment operations of system it is whether normal, whether pipeline unimpeded, carry out ground line road test spray, check survey
It is whether complete, intact to try monitoring instrument, firmly believe it is errorless after be allowed for access the next step；
Step 52: surveying setting-out；
Step 53: drilling machine is in place, and drilling machine is placed in design hole location, so that drill bit is directed at hole location center, while to guarantee drilling
The verticality for reaching design requirement afterwards, after drilling machine is in place, it is necessary to do level correction, make its drilling rod perpendicular alignmnet drill center position
It sets, the drilling rod for not meeting verticality requirement is adjusted, until drilling rod verticality reaches requirement, in order to guarantee that a level is true,
Using positioning card, the stake position error of centralization is not more than 2cm；
Step 54: drilling, it is well-controlled in drilling process, drilling parameter is rationally grasped, rate of penetration is controlled, prevents bit freezing
Etc. various drilling accidents, once drilling accident occurs, strive for that all times are handled as early as possible；
Step 55: spray head is protected in lower Grouting Pipe, when lower Grouting Pipe, prevents tuyere, slurry mouth blocking；
When meet it is not in place under high jet pipe or under do not go phenomenon when, should be handled depending on different situations, it is ensured that not collapse hole, it is necessary to really
Guarantor's spray boom, can formal jet groutinl down toward estimated depth；
Step 56: slurrying；
Step 57: jet groutinl operation, to slurry, air-supply behind predetermined position, is successively sent, will spray surely the several seconds in bottom hole under Grouting Pipe,
Adjustment pump pressure, wind pressure determined to after testing value and aperture return slurry it is normal after start to be promoted in rotation, by after test it is determining be worth into
The high spray parameter of row is constructed, and multiple spray is also carried out after the completion of construction；
Step 58: recharge slurries, after high pressure is sprayed, because of volume contraction in cement grout consolidation process in hole, while hole
Interior slurries still have certain leakage to hole wall surrounding range, and slurries decline the heavy face for a period of time occur in hole, should be incessantly
By in slurries recharge to spray orifice, and crushing is kept, until Starch Level in hole no longer sinks.
Further, in the step 51 preparation of construction include following aspect preparation:
Air feed: drilling construction air feed follows drilling machine air feed using wind pressure air compressor machine in the dynamic movable type of 12m3 oil；Grouting is moved using 9m3
Wind pressure air compressor machine air feed in dynamic formula；
Supply water: high pressure jet grouting water intensity about 50m3/h is quoted with 50 water pipe of φ from main-supply, each in working face and mixing plant
1 4m3 water tank is set, guarantees the continuity to supply water；
Power supply: using three-level distribution system, by transformer low voltage power distribution cabinet to distribution electric box, then by each distribution electric box to switch
Case, electrical equipment is from switch-box wiring electricity consumption；
Pulping equipment: respectively arranging the mixing plant of 2 60m3 scales in enclosing, carries out slurries conveying using 3SNS grouting pump, high
Pressure grout pipe is directly laid with to each working face, then temporarily disposes high pressure jet grouting to pump and store up pulp grinder in construction part；
Construction drainage: sewage ditch is set along temporary construction enclosing, and arranges waste pulp processing pond, each construction part blowdown is mutual
It is connected, it is uniformly transported to Dumping Sites with vehicle by construct waste water, waste pulp collection and uniform disposal, the objects such as construction waste residue, and is sent special
People clears up for a long time.
Further, in the step 52, surveying setting-out releases high-pressure rotary jet grouting pile position by root using total station, with small bamboo
Label mark, and spread lime mark, it is ensured that stake machine is accurately in place.
Further, in the drilling machine in place and in the boring procedure, to pay attention to checking drilling rod verticality, discovery at any time
Timely correction is tilted, to ensure drill hole inclination in design allowed band；Drilling speed will beat slow shelves, and use guide device, prevent
Only hole deviation.
Further, the step 56: slurrying, using 42.5 grades of ordinary portland cements of label, the cement slurry ratio of mud is
1:1, with blender mixing cement grout.
Further, back-pressure platform is formed in projective water point radius 8.5m range pile sand pocket, it is tri- face 1:1 that back-pressure platform, which is pressed,
Slope, back-pressure platform top are arranged centered on projective water point pile body, to each stretching, extension 3.5m in foundation pit enclosure stake outside.
Further, it in the step 3, when water gushing in pit streamflow is smaller, fills in cotton-wool and steel floral tube is drained,
It squeezes into timber wedge to consolidate steel floral tube, when steel floral tube streamflow very little, squeezes into steel floral tube with timber wedge, by spray of molten steel blockage.
Further, monitoring data include displacement at pile top, deviational survey, the number of support shaft force value, level of ground water in the step 6
According to, read and is sent to management platform to the existing monitoring point in scene per hour, concern displacement at pile top, deviational survey, support shaft force value,
The changing value of lower water level, while reinforcing making an inspection tour surrounding building and patrol, including lake surface water level, the village Jian Gong face and build house foundation.
Further, step 7 is also carried out between the step 1 and the step 2, the step 7: seeking sources of water, and blocks
Projective water point is analyzed at water source, and the reason of find out gushing water, according to the geographical location of projective water point and comprehensive analysis, is found out
The water source of gushing water, and try to block the source of gushing water.
According to the present invention of above scheme, the beneficial effect is that, the present invention can handle water gushing in pit accident in time, keep away
Exempt from foundation pit to collapse, the present invention can reduce the personnel depaly of redundancy, keep the configuration in each post more reasonable, and labour cost subtracts
Few, material allocation is more reasonable, can reduce the unnecessary loss of material, and the present invention is conducive to fill up gushing water emergency rescue technology
Blank, can be improved the emergency rescue technology of the accidents such as the gushing water being likely encountered in Excavation Process, be conducive to drive phase
The safe construction for closing base pit engineering, guarantees the security developments of subway construction, advantageously forms the theoretical frame to emergency management and rescue, trains
The professional team for supporting tissue emergency management and rescue, enables foundation pit to organize most effective rescue when encountering emergency case in process of construction
It helps.
Detailed description of the invention
Fig. 1 is workflow schematic diagram of the invention.
Fig. 2 is the specific workflow diagram of whitewashing of drilling in the present invention.
Fig. 3 is the preparation of construction schematic diagram of whitewashing of drilling in the present invention.
Fig. 4 is that back-pressure of the invention drains schematic diagram.
1, steel floral tube in the figure；2, projective water point；3, back-pressure platform；4, foundation pit enclosure stake.
Specific embodiment
With reference to the accompanying drawing and the present invention is further described in embodiment:
It is as shown in Figs 1-4, a kind of to be based on mud jackstone stratum water gushing in pit emergency processing construction method, comprising the following steps:
Step 1: closing power supply, personnel withdraw from, and the power supply of all devices in foundation pit are closed, and withdraw from full complement and set
It is standby；
Step 2: back-pressure platform 3 is arranged in gushing water back-pressure around projective water point 2；In projective water point radius 8.5m range pile sand pocket shape
At back-pressure platform 3, back-pressure platform 3 is arranged centered on projective water point pile body, Xiang Ji according to tri- face slope of 1:1 at the top of back-pressure platform 3
Each stretching, extension 3.5m in 4 outside of pit enclosure stake；
Step 3: gushing water drainage carries out gushing water drainage when water gushing in pit streamflow is smaller；It is smaller to water gushing in pit streamflow
When, it fills in cotton-wool and steel floral tube 1 is drained, squeeze into timber wedge and consolidate steel floral tube 1, when 1 streamflow very little of steel floral tube, with wood
Wedge is squeezed into steel floral tube 1, and steel floral tube 1 is blocked；
Step 4: projective water point is reinforced, and is reinforced to 2 region of projective water point；Mesh reinforcement is formed to gushing water position using angle steel, and
Linked network spray shield concrete；
Step 5: drilling whitewashing, along water-stop curtain axis direction right above projective water point, bored grouting will be certain near projective water point
Region forms enclosure space；
Geology bore driving depth be 17~21m, if encountering cavity in boring procedure, stop drilling and in time perfusion dual slurry or
Person is perfused the early strong concrete of C20 graduation two (slump requires 20cm or more) according to cavity size, and concrete increases accelerator and early strong
Agent.
Step 6: monitoring is monitored gushing water scene, and monitoring data include displacement at pile top, deviational survey, support shaft force value,
Lower waterlevel data；The existing monitoring point in scene is read per hour and is sent to management platform, concern displacement at pile top is especially needed, surveys
Tiltedly, support shaft force value, WATER LEVEL CHANGES value, while reinforcing making an inspection tour surrounding building and patrol, including lake surface water level, the village Jian Gong
Face and build house foundation, and increases monitoring point newly in column foot foundation simultaneously.
The step 5 the following steps are included:
Step 51: preparation of construction is changed the reinforcing scope soil body using brachium 10m backhoe excavation fill out plain soil first, then by two-tube height
A complete set of equipment needed for pressure rotary-spraying mortar depositing construction and ancillary equipment carry out reasonable Arrangement, installation by construction site situation, then divide
Not Jian Cha gas, slurry the two big various equipment operations of system it is whether normal, whether pipeline unimpeded, carry out ground line road test spray, check survey
It is whether complete, intact to try monitoring instrument, firmly believe it is errorless after be allowed for access the next step, specifically include the preparation of following aspect:
Air feed: drilling construction air feed follows drilling machine air feed using wind pressure air compressor machine in the dynamic movable type of 12m3 oil；Grouting is moved using 9m3
Wind pressure air compressor machine arranges air feed nearby in dynamic formula；
It supplies water: high pressure jet grouting water intensity about 50m3/h.It is quoted with 50 water pipe of φ from main-supply, it is each in working face and mixing plant
1 4m3 water tank is set and guarantees the continuity to supply water；
Power supply: using three-level distribution system, by transformer low voltage power distribution cabinet to distribution electric box, then by each distribution electric box to switch
Case, electrical equipment is from switch-box wiring electricity consumption；
Pulping equipment: the mixing plant of 2 60m3 scales of arrangement carries out slurries conveying, high-pressure grouting Guan Zhi using 3SNS grouting pump
It connects and is laid with to each working face, then temporarily dispose high pressure jet grouting to pump and store up pulp grinder in construction part；
Construction drainage: sewage ditch is set along temporary construction enclosing, and arranges waste pulp processing pond, each construction part blowdown is mutual
It is connected, it is uniformly transported to Dumping Sites with vehicle by construct waste water, waste pulp collection and uniform disposal, the objects such as construction waste residue, and is sent special
People clears up for a long time；
Step 52: surveying setting-out is released high-pressure rotary jet grouting pile position by root using total station, is marked with small bamboo spike, and spread white
Ash mark, it is ensured that stake machine is accurately in place；
Step 53: drilling machine is in place, and drilling machine is the first procedure of jet groutinl in place, and drilling machine is placed in design hole location, makes to bore
Head alignment hole location center.Simultaneously to guarantee the verticality for reaching design requirement after drilling, after drilling machine is in place, it is necessary to do horizontal school
Just, make its drilling rod perpendicular alignmnet drill center position.The drilling rod for not meeting verticality requirement is adjusted, until drilling rod is vertical
Degree reaches requirement.In order to guarantee that a level is true, using positioning card, the stake position error of centralization is not more than 2cm；
Step 54: drilling,
It is well-controlled in drilling process, drilling parameter is rationally grasped, rate of penetration is controlled, prevents thing in the various holes such as bit freezing
Therefore.Once drilling accident occurs, strive for that all times are handled as early as possible；
To avoid bore inclining, drilling machine in place and boring procedure in, to pay attention at any time check drilling rod verticality, discovery tilt and
When correct, with ensure drill hole inclination design allowed band in；Drilling speed will beat slow shelves, and use guide device, prevent from drilling
Inclination；
Step 55: spray head is protected in lower Grouting Pipe, when lower Grouting Pipe, prevents tuyere, slurry mouth blocking.When meeting under high jet pipe
It is not in place or under when not going phenomenon (Soft Soil Layer), should be handled depending on different situations, it is ensured that not collapse hole.Must assure that spray boom down toward
It is expected that depth, it can formal jet groutinl；
Step 56: slurrying, using 42.5 grades of ordinary portland cements of label, the cement slurry ratio of mud presses 1:1, with blender mixing water
Slurry liquid；
Step 57: jet groutinl operation, to slurry, air-supply behind predetermined position, is successively sent, will spray surely the several seconds in bottom hole under Grouting Pipe,
Adjustment pump pressure, wind pressure determined to after testing value and aperture return slurry it is normal after start to be promoted in rotation, by after test it is determining be worth into
The high spray parameter of row is constructed, and multiple spray is also carried out after the completion of construction；
Step 58: recharge slurries, after high pressure is sprayed, because of volume contraction in cement grout consolidation process in hole, while hole
Interior slurries still have certain leakage to hole wall surrounding range, and slurries decline the heavy face for a period of time occur in hole, should be incessantly
By in slurries recharge to spray orifice, and crushing is kept, until Starch Level in hole no longer sinks.
Step 7 is also carried out between the step 1 and the step 2, the step 7: seeking sources of water, and water source is blocked, to prominent
Water spot is analyzed, and the reason of find out gushing water, according to the geographical location of projective water point and comprehensive analysis, finds out the water of gushing water
Source, and try to block the source of gushing water.
The present invention can handle water gushing in pit accident in time, and foundation pit is avoided to collapse, and the present invention can reduce the personnel of redundancy
Configuration, keeps the configuration in each post more reasonable, the reduction of labour cost, material allocation is more reasonable, and can reduce material need not
The loss wanted, the present invention are conducive to fill up the blank of gushing water emergency rescue technology, and can be improved may chance in Excavation Process
The emergency rescue technology of the accidents such as the gushing water arrived is conducive to the safe construction for driving related base pit engineering, guarantees subway construction
Security developments, advantageously form the theoretical frame to emergency management and rescue, and the professional team of cultured tissue emergency management and rescue is building foundation pit
If most effective rescue can be organized when encountering emergency case in the process.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Illustrative description has been carried out to the invention patent above in conjunction with attached drawing, it is clear that the realization of the invention patent not by
The limitation of aforesaid way, if the method concept of the invention patent and the various improvement of technical solution progress are used, or without
It improves and the conception and technical scheme of the invention patent is directly applied into other occasions, be within the scope of the invention.
Claims (10)
1. one kind is based on mud jackstone stratum water gushing in pit emergency processing construction method, which comprises the following steps:
Step 1: closing power supply, personnel withdraw from, and the power supply of all devices in foundation pit are closed, and withdraw from full complement and set
It is standby；
Step 2: back-pressure platform is arranged in projective water point in gushing water back-pressure；
Step 3: gushing water drainage carries out gushing water drainage when water gushing in pit streamflow is smaller；
Step 4: projective water point is reinforced, and is reinforced to projective water point region, forms mesh reinforcement to gushing water position using angle steel, and hang
Net spray shield concrete；
Step 5: drilling whitewashing, along water-stop curtain axis direction right above projective water point, bored grouting will be certain near projective water point
Region forms enclosure space；
Step 6: monitoring is monitored gushing water scene.
2. according to claim 1 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
The step 5 the following steps are included:
Step 51: preparation of construction is changed the reinforcing scope soil body using brachium 10m backhoe excavation fill out plain soil first, then by two-tube height
Then a complete set of equipment needed for pressure rotary-spraying mortar depositing construction and ancillary equipment are divided by construction site situation progress reasonable Arrangement, installation
Not Jian Cha gas, slurry the two big various equipment operations of system it is whether normal, whether pipeline unimpeded, carry out ground line road test spray, check survey
It is whether complete, intact to try monitoring instrument, firmly believe it is errorless after be allowed for access the next step；
Step 52: surveying setting-out；
Step 53: drilling machine is in place, and drilling machine is placed in design hole location, so that drill bit is directed at hole location center, while to guarantee drilling
The verticality for reaching design requirement afterwards, after drilling machine is in place, it is necessary to do level correction, make its drilling rod perpendicular alignmnet drill center position
It sets, the drilling rod for not meeting verticality requirement is adjusted, until drilling rod verticality reaches requirement, in order to guarantee that a level is true,
Using positioning card, the stake position error of centralization is not more than 2cm；
Step 54: drilling, it is well-controlled in drilling process, drilling parameter is rationally grasped, rate of penetration is controlled, prevents bit freezing
Etc. various drilling accidents, once drilling accident occurs, strive for that all times are handled as early as possible；
Step 55: spray head is protected in lower Grouting Pipe, when lower Grouting Pipe, prevents tuyere, slurry mouth blocking；
When meet it is not in place under high jet pipe or under do not go phenomenon when, should be handled depending on different situations, it is ensured that not collapse hole, it is necessary to really
Guarantor's spray boom, can formal jet groutinl down toward estimated depth；
Step 56: slurrying；
Step 57: jet groutinl operation, to slurry, air-supply behind predetermined position, is successively sent, will spray surely the several seconds in bottom hole under Grouting Pipe,
Adjustment pump pressure, wind pressure determined to after testing value and aperture return slurry it is normal after start to be promoted in rotation, by after test it is determining be worth into
The high spray parameter of row is constructed, and multiple spray is also carried out after the completion of construction；
Step 58: recharge slurries, after high pressure is sprayed, because of volume contraction in cement grout consolidation process in hole, while hole
Interior slurries still have certain leakage to hole wall surrounding range, and slurries decline the heavy face for a period of time occur in hole, should be incessantly
By in slurries recharge to spray orifice, and crushing is kept, until Starch Level in hole no longer sinks.
3. according to claim 2 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
Preparation of construction includes the preparation of following aspect in the step 51:
Air feed: drilling construction air feed follows drilling machine air feed using wind pressure air compressor machine in the dynamic movable type of 12m3 oil；Grouting is moved using 9m3
Wind pressure air compressor machine air feed in dynamic formula；
Supply water: high pressure jet grouting water intensity about 50m3/h is quoted with 50 water pipe of φ from main-supply, each in working face and mixing plant
1 4m3 water tank is set, guarantees the continuity to supply water；
Power supply: using three-level distribution system, by transformer low voltage power distribution cabinet to distribution electric box, then by each distribution electric box to switch
Case, electrical equipment is from switch-box wiring electricity consumption；
Pulping equipment: respectively arranging the mixing plant of 2 60m3 scales in enclosing, carries out slurries conveying using 3SNS grouting pump, high
Pressure grout pipe is directly laid with to each working face, then temporarily disposes high pressure jet grouting to pump and store up pulp grinder in construction part；
Construction drainage: sewage ditch is set along temporary construction enclosing, and arranges waste pulp processing pond, each construction part blowdown is mutual
It is connected, it is uniformly transported to Dumping Sites with vehicle by construct waste water, waste pulp collection and uniform disposal, the objects such as construction waste residue, and is sent special
People clears up for a long time.
4. according to claim 2 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
In the step 52, surveying setting-out releases high-pressure rotary jet grouting pile position by root using total station, is marked with small bamboo spike, and spread white
Ash mark, it is ensured that stake machine is accurately in place.
5. according to claim 2 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
In the drilling machine in place and in the boring procedure, to pay attention to checking drilling rod verticality, discovery inclination timely correction, with true at any time
Drill hole inclination is protected in design allowed band；Drilling speed will beat slow shelves, and use guide device, prevent hole deviation.
6. according to claim 2 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
The step 56: slurrying, using 42.5 grades of ordinary portland cements of label, the cement slurry ratio of mud is 1:1, with blender mixing water
Slurry liquid.
7. according to claim 1 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
Back-pressure platform is formed in projective water point radius 8.5m range pile sand pocket, it is tri- face slope of 1:1, back-pressure platform top that back-pressure platform, which is pressed,
It is arranged centered on projective water point pile body, to each stretching, extension 3.5m in foundation pit enclosure stake outside.
8. according to claim 1 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
In the step 3, when water gushing in pit streamflow is smaller, fills in cotton-wool and steel floral tube is drained, squeeze into timber wedge for steel floral tube
It is firm, when steel floral tube streamflow very little, steel floral tube is squeezed into timber wedge, by spray of molten steel blockage.
9. according to claim 1 be based on mud jackstone stratum water gushing in pit emergency processing construction method, which is characterized in that
Monitoring data include displacement at pile top, deviational survey in the step 6, support shaft force value, the data of level of ground water, per hour both to scene
There is monitoring point to read and is sent to management platform, concern displacement at pile top, deviational survey, the changing value of support shaft force value, level of ground water, together
Shi Jiaqiang makes an inspection tour surrounding building and patrols, including lake surface water level, the village Jian Gong face and build house foundation.
10. according to claim 1 be based on mud jackstone stratum water gushing in pit emergency processing construction method, feature exists
In, step 7 is also carried out between the step 1 and the step 2, the step 7: seeking sources of water, block water source, to gushing water click through
The reason of going and analyze, and finding out gushing water, according to the geographical location of projective water point and comprehensive analysis, finds out the water source of gushing water, and set
The source of method blocking gushing water.
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Application publication date: 20181228 |