CN103321260A - Rectifying method by drilling at intervals and pile cutting off - Google Patents
Rectifying method by drilling at intervals and pile cutting off Download PDFInfo
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Abstract
The invention provides a rectifying method by drilling at intervals and pile cutting off. The method includes excavating at least two constructing wells along the longitudinal direction of the light settlement side, communicating all the constructing wells, excavating a plurality of horizontal roadways, determining the pile cutting height of each concrete pile from the light settlement side to the heavy settlement side in a same row of concrete piles according to designed maximum rectifying amount by the principle of similar triangles, cutting off piles in batches, and arranging a pre-reserved stripe between two adjacent pile-cutting holes on one concrete pile; rectifying by the own weight of an inclined building and force of an anchor cable arranged at the light settlement side until a rectifying target is achieved; patching the pile-cutting hole, filling back the wells and the roadways, and finishing rectifying of the inclined building. By the aid of the method, blindness and sudden sinking effect of pile cutting off can be avoided effectively, rectifying risks are reduced, defects of poor controllability, difficulty in mastering pile cutting amount accurately and the like are overcome, controllability and security of rectifying are improved greatly, and the method can be applied in the fields of building rectifying and reinforcing.
Description
Technical field
The invention belongs to building or inclined building correcting field of engineering technology, relate to a kind of method that building or structure are carried out rectification, particularly a kind of interval boring cuts a stake inclination correction method.
Background technology
People have built a large amount of building in order to produce with needs of life, but process the reasons such as not proper or improper use owing to ground, the run-off the straight in construction or use procedure of some building, the lighter affects the normal use of building, function is used in forfeiture when serious, even collapse.According to the investigation of authoritative institution, the annual new building of present China is 2,000,000,000 square meters approximately, consume steel and the cement in the whole world 40%, and these building average life spans only have 25～30 years.No matter be newly-built or dismounting, all will consume a large amount of social resources, and can bring hundreds of millions of cubes building waste, cause huge environment pollution.Still have the most of inclined building that continues use value for those through detecting assay certificate, can recover it by rectification and corresponding reinforcement measure and use function, prolong its application life.Just in view of this consideration, people constantly attempt adopting suitable method that the building that tilt are carried out the rectification righting.
At present, the building inclination correction method roughly has kind more than 30, according to processing mode can be summed up as forced landing method, lifting method, study in France in advance, horizontal five large classes such as Loading Method and synthesis.Forced-landing tilt correcting refers to utilize various means to go to adjust the distortion of foundation soil, impels it to produce additional settlement, so as to reaching the rectification purpose.
Cut the stake correcting method and belong to a kind of in the forced landing method, it is in the little side of settlement of building, clips a part of pile body below the foundation platform, reaches the purpose of adjusting relative settlement; Its rectification principle is: in the soil digging district of drafting base soil is emptied, the home base counter-force is converted into pile top load, make stake be difficult for producing sedimentation because bearing capacity of pile tip is higher, can only first truncation part pile body, load is born by near the stake of not blocking, heavily distribute thereby produce load on pile foundation, force cushion cap to sink, to reach the purpose of rectification righting building.But at present, owing to cutting the theoretical system that the stake correcting method not yet forms system, still instruct engineering practice with the experience of using for reference in the past, that is: according to the tilt quantity that calculates, cut stake instruments and in the stake bottom stake is directly blocked, taken out adopt of heavy side less more; In this type of section stake rectification operating process, each strong point can not be uniform stressed, can not quantitatively control, and belongs to brittle fracture, and it is prominent heavy very easily to produce.Therefore, such inclination correction method cuts the stake amount and is difficult to accurate grasp, building easily produce the defective such as prominently sink, exist that construction risk is large, poor controllability and rectification benefit are low, and special for those inclination high-rise buildings that are composite foundation, its rectification difficulty and construction risk are just larger.
Summary of the invention
The object of the invention is to provide the boring of a kind of interval to cut the stake inclination correction method, in cutting the stake process, make the brittle fracture of stake become flexible destruction, realize linear change, can effectively avoid cutting in the rectification of stake forced landing method building easily produce prominent heavy, construction risk is large, poor controllability and cut the stake amount and be difficult to the defectives such as precisely grasp.
For achieving the above object, the technical solution adopted in the present invention is: the boring of a kind of interval cuts the stake inclination correction method, specifically carries out according to the following steps:
Step 1: along the inclined building length direction of heavy side less, inclined building less heavy side excavate side by side at least two construction wells, the degree of depth of construction well to the inclined building raft plate 1.7～2.0 meters;
Step 2: excavate the main tunnel that connects all construction wells, main tunnel is concordant with the raft panel edges of this inclined building towards a side of inclined building, then from main tunnel, in the basis of inclined building, excavate many entrys perpendicular to main tunnel, so that be positioned at the same entry along the length direction in main tunnel, the per two row concrete piles that begin from the first row concrete pile, entry forms can be for the working space that cuts stake;
Step 3: the maximum according to the inclined building that designs is returned the amount of inclining, according to similar triangle theory, determine in the same row concrete pile from inclined building less heavy side to inclined building how heavy every concrete pile of side cut the stake height, wherein be positioned at inclined building less the stake that cuts of the concrete pile of heavy lateral edges highly be that the maximum settlement of inclined building is poor, the concrete pile that is positioned at many sedimentations of inclined building lateral edges does not cut stake; Take " inclined building less the maximum of heavy side to cut stake highly be that the differential settlement of inclined building is projected as another right-angle side as the base of a right-angle side, building inclination direction on horizontal plane; the base of building inclination direction is hypotenuse " consist of triangle, reduce to scale to cut stake highly by the stake position of single pile place stake row according to the principle of similar triangles; Simultaneously determine the concrete pile that cuts with a collection of according to following principle: if during designing and calculating, every calculating parameter value is definite by testing, then cut in two batches stake, first batch cut stake quantity be inclined building less under the heavy side 75%, second batch of the concrete pile sum be inclined building less under the heavy side 25% of the concrete pile sum; If, for safety then should be divided into three batches and advance cut stake by the experience gained every designing and calculating parameter, first batch cut stake be inclined building less under the heavy side 50%, the second batch of the concrete pile sum be that inclined building sinks 25% of concrete pile sum under the side less; The 3rd batch is that inclined building is less under the heavy side 25% of the concrete pile sum; Be to embody uniformity, i.e. every batch cut stake stake position and on grade level, must be and be evenly arranged; During every batch section stake, adopt interval mode to cut stake;
After can forming for a working space that cuts stake, highly cut a stake operation according to the stake that cuts of the every concrete pile of determining, when cutting stake, in the side by side a plurality of sections stake holes of Drilling of cutting on the stake height and position of every concrete pile, two are cut between the hole and leave the reservation band;
Every batch is cut after stake finishes, and relies on the weight of inclined building self and to carrying out rectification in the anchor cable application of force of less heavy side setting, until reach rectification target;
Step 4: the concrete that adopts the intensity that communicates with the inclined building concrete pile carries out embedding benefit, vibration compacting to the stake hole of cutting on the concrete pile of implementing to cut the stake rectification; After adopting sandy gravel soils compaction in layers backfill entry, again the entry of backfill carried out the secondary grouting processing;
Step 5: use the concrete filling construction well with raft plate same intensity, and be linked to be integral body by bar planting and raft foundation, guarantee the long-term firm of rectification achievement and building; Vertical shaft to excavation adopts 37 lime earth layering rammer to be filled to the nature ground level.
Construction well in the described step 1 is vertical shaft or inclined shaft; If heavy side place is open less, work plane is enough large for inclined building, then at inclined building heavy side excavation inclined shaft less, this inclined shaft is 2～3 times of inclined building raft plate buried depth apart from the distance of inclined building; If inclined building is heavy side narrow space less, excavating shaft then, vertical shaft can be at inclined building less in the building of heavy side or building.
The rectification mode that adopts in the described step 3, five principles that in building inclination rectification, must satisfy according to prestress anchorage cable design specifications in " landslide control engineering technique of design and construction standard " and prestress anchorage cable: 1. the ground maximum anchored force that can provide, 2. the basic raft plate concentrated force that can bear, 3. the ground limit rupture load that can bear, 4. the anchor cable pulling force provides back the heeling moment of square less than the generation of inclined building centre-of gravity shift of going all out, calculate quantity and the single anchor cable of laying anchor cable stressed, and definite anchorage cable design load,
The pile foundation subsidiary stress that the total load of anchor cable pulling force produces should be not less than last batch and cut the pile foundation subsidiary stress that stake increases, and calculates quantity and the single anchor cable of laying anchor cable stressed, and definite anchorage cable design load.According to design aperture and the length of anchor cable, inclined building less heavy side group plinth carry out anchor cable construction, the upper end of anchor cable is positioned at the top of raft plate, the lower end of anchor cable is passed in the good ground that the raft plate stretches into the inclined building ground; Anchor head place erection stress sensor, hydraulic jack and locking device outside the anchor cable on the inclined building basis; Anchor cable, hydraulic jack and coupled electric oil pump consist of afterburner system, consist of dynamometric system by the oil pressure gauge that arranges on strain gauge and the electric oil pump; Utilize hydraulic jack that anchor cable is carried out loaded and tensioned stage by stage, general per 100～150kN is one-level, every grade adds that to hold the load time be 0.5～1 hour, record simultaneously the reading of oil pressure gauge and strain gauge, check afterburning size, the sedimentation of Real Time Monitoring inclined building and displacement situation, in time feedback information; According to feedback information, when the reinforcing value of anchor cable not yet reaches design load, inclined building returns the value of inclining and cuts stake when calculating the rectification value of setting near every batch, when reaching predetermined rectification target, stops the anchor cable reinforcing; After the afterburning value of anchor cable reaches design load, building returns the amount of inclining and not yet reaches when being scheduled to rectification target, hydraulic jack is unloaded, proceed an operation that cuts of next batch, after section stake operation of this batch is complete, again utilize hydraulic jack afterburning to anchor cable, record simultaneously the reading of strain gauge and oil pressure gauge, carry out the vernier control rectification, until reach till the rectification target; After reaching rectification target, the anchor cable of heavy side is less applied prestressing force and is locked on the inclined building basis, in case incline again.
The present invention cuts the stake correcting method with interval boring first and is applied to building rectification field, by the excavation tunnel, hole at the pile crown interval of less heavy side stake with rig in batches, to reduce the loaded area of stake, impel the local sedimentation of ground, the control building return and incline speed and return the direction of inclining, thereby reach the purpose of rectification; The band that reserves between boring plays the safety supports effect, makes the destruction of stake become flexible destruction by brittle fracture, realizes linear change.The great advantage of inclination correction method of the present invention is that safety is safe, controllability good, because when the stake batch by batch and stage by stage of heavy side cuts stake less to building, also utilize the boring of rig interval to cut stake to every batch of stake that will cut, the aperture of boring is from sinking less side toward how heavy side directions reduce gradually, and reserve the band of certain width, to play the effect of safety supports, because the loaded area of stake has reduced, under the upper load effect, flexible destruction will occur in the spacer tape that reserves during boring, slow down the basic rate of settling, realized linear change.This inclination correction method is compared with the stake forced-landing tilt correcting method of cutting in the past, can effectively avoid cutting blindness and the prominent heavy effect of stake, reduce the rectification risk, overcome simultaneously poor controllability and a section stake and measured defectives such as being difficult to precisely grasp, greatly improved controllability and the safety of rectification.Inclination correction method of the present invention can be applicable to building rectification and reinforcement of building field.
Description of drawings
Fig. 1 is the layout schematic diagram when adopting inclination correction method of the present invention that certain building is carried out rectification.
Fig. 2 is the I-I sectional schematic diagram of Fig. 1.
Fig. 3 is the partial enlarged drawing at P place among Fig. 2.
Among the figure: 1. inclined building, 2. vertical shaft, 3. raft plate, 4. entry, 5. sump, 6. concrete pile, 7. main tunnel, 8. band is 9. reserved in section stake hole, 10. anchor cable, 11. strain gauges, 12. hydraulic jack.
The specific embodiment
For further setting forth technological means and the technique effect that the present invention adopts when realizing predetermined purpose, the invention will be further described below in conjunction with specific embodiment and accompanying drawing thereof.
Interval of the present invention boring is cut the stake inclination correction method be used for certain high-rise residential building rectification and reinforcement of building engineering, its implementation step is as follows:
A. according to the inclined building 1 less length on the long limit of heavy side and the complexity of construction, can select to excavate 2～4 vertical shafts in two vertical shaft 2(practice of construction of inclined building outside excavation of heavy side less at inclined building 1), 15～30 meters of the spacings of two vertical shafts 2; The degree of depth of vertical shaft 2 is to 1.7～2.0 meters of inclined building 1 raft plates 3 times, and vertical shaft 2 is as the passage of excavation entrys 4; According to strata condition, vertical shaft 2 is constructed according to the construction principle of one section of excavation, one section of protection, from shallow to deep constantly cycle operation, until reach the projected depth of vertical shaft 2, the retaining wall of will in time constructing after 1.0～1.5 meters of every excavations are dark, to guarantee construction safety, the retaining wall of vertical shaft 2 can build up with brick or steel concrete, and vertical shaft 2 domestic demands are aided with illumination, waterproof measure, when underground water enriches, excavate a sump 5 in vertical shaft 2 bottoms, sump 5 dark 0.5 meter; As shown in Figure 1 and Figure 2;
B. for the ease of constructing and increasing work efficiency, need to be positioned at according to inclined building 1 deployment scenarios of the concrete pile 6 under the raft plate 3, excavate a main tunnel 7 that connects two vertical shafts 2, main tunnel 7 is concordant with raft plate 3 edges towards the sidewall of inclined building 1 one sides; Then along main tunnel 7, excavate many perpendicular to the entry 4 in main tunnel 7, many entrys 4 evenly distribute along inclined building 1 length direction; Be positioned at same entry 4 along the length direction in main tunnel 7, the per two row concrete piles 6 that begin from first row concrete pile 6, entry 4 forms can be for a working space that cuts stake; The cross dimensions of main tunnel 7 and entry 4 is 1.7～2.0 meters * 0.8～1.0 meter;
Five principles that c. according to prestress anchorage cable 10 design specifications in " landslide control engineering technique of design and construction standard " and prestress anchorage cable 10, must meet in building 1 rectification: the 1. ground maximum anchor force that can provide, 2. basic raft plate 3 concentrated force that can bear, 3. the ground limit failing load that can bear, 4. anchor cable 10 pulling force provide back the heeling moment that the square of going all out produces less than inclined building 1 centre-of gravity shift, calculate quantity and the single anchor cable of laying anchor cable 10 stressed, and definite anchor cable 10 design loads
The pile foundation additional stress that the total load head of anchor cable 10 pulling force produces should be not less than last batch and cut the pile foundation additional stress that stake increases, and calculates quantity and the single anchor cable of laying anchor cable 10 stressed, and definite anchor cable 10 design loads.According to design aperture and the length of anchor cable 10, carry out anchor cable 10 constructions in the basis of heavy side less at inclined building 1, anchor cable 10 upper ends are positioned at raft plate 3 tops, and anchor cable 10 lower ends are passed in the good ground that raft plate 3 stretches into inclined building 1 ground; Anchor cable 10 outer anchor head place erection stress sensors 11, hydraulic jack 12 and locking device on inclined building 1 basis; Anchor cable 10, hydraulic jack 12 and coupled electric oil pump consist of afterburner system, consist of dynamometric system by the oil pressure gauge that arranges on strain gauge 11 and the electric oil pump;
After can forming for the working space that cuts stake, maximum according to the inclined building 1 that designs is returned the amount of inclining, according to similar triangle theory, determine in the same row concrete pile 6 from inclined building 1 less heavy side cut stake highly to what inclined building more than 1 heavy every concrete piles of side 6 needed; Wherein, be positioned at inclined building 1 less heavy lateral edges concrete pile 6 to cut stake highly poor for the maximum settlement of inclined building 1, the cutting of concrete pile 6 that is positioned at inclined building more than 1 heavy lateral edges highly is zero, namely do not cut stake; Take " inclined building 1 less the maximum of heavy side to cut stake highly be that the differential settlement of inclined building 1 is projected as another right-angle side as the base of a right-angle side, building 1 incline direction on horizontal plane; the base of inclined building 1 incline direction is hypotenuse " the formation triangle, reduce to scale to cut the stake height by the stake position of single concrete pile 6 place stakes row according to the principle of similar triangles, principle is determined in the same row concrete pile 6 from inclined building 1 cutting highly of needing of the every concrete pile 6 that sets gradually to inclined building more than 1 heavy sides of heavy side less according to this; Inclined building 1 less cutting of needing of heavy every concrete pile of side 6 pile crowns begins to cut a stake operation after stake highly determines: every concrete pile 6 pile crowns according to the sectional dimension of concrete pile 6 and determine cut the stake height, and a plurality of sections stake holes 8 of gang drill, as shown in Figure 3; A plurality of sections stake holes 8 on every concrete pile 6 are in the sustained height position, and adjacent two are cut that to leave thickness between the stake holes 8 be 5～20 millimeters reservation band 9 in the same solidifying soil stake 6, and the axis that cuts stake hole 8 and the inclined building 1 less direction on heavy side length limit are consistent; Be linearity and reduce successively in heavy side every concrete pile 6 pile crown that cut in many heavy side directions, the same row concrete pile 6 aperture of cutting a hole 8 less along inclined building 1.In order to ensure controllability and the safety of inclined building 1 in the rectification process, cut stake should be strictly by jump stake, in batches, by stages principle carries out, determine the concrete pile 6 that cuts with a collection of according to following principle: if during designing and calculating, every calculating parameter value is definite by testing, then cut in two batches stake, first batch cut stake quantity be inclined building 1 less under the heavy side 75%, second batch of concrete pile 6 sums be inclined building 1 less under the heavy side 25% of concrete pile 6 sums; If to every designing and calculating parameter by the experience gained, for safety then should be divided into three batches and advance to cut stake, first batch cut stake be inclined building 1 less under the heavy side 50%, the second batch of concrete pile 6 sums be that inclined building 1 sinks 25% of concrete pile 6 sums under the side less; The 3rd batch is that inclined building 1 is less under the heavy side 25% of concrete pile 6 sums; Be to embody uniformity, i.e. every batch cut stake stake position and on grade level, must be and be evenly arranged; In addition, produce malformation for avoiding inclined building 1, every batch when cutting stake, adopt interval mode to cut stake, namely vertical and horizontal all 1～4 concrete pile 6 in interval cut stake, same batch when cutting stake, the rule that the interval is cut is identical.After every batch section stake is finished, stop to cut the stake operation, utilize 12 pairs of anchor cables of hydraulic jack 10 to carry out loaded and tensioned stage by stage, general per 100～150kN is one-level, every grade adds that to hold the load time be 0.5～1 hour, records simultaneously the reading of oil pressure gauge and strain gauge 11, checks afterburning size, 1 sedimentation of Real Time Monitoring inclined building and displacement situation, in time feedback information; According to feedback information, when the reinforcing value of anchor cable 10 not yet reaches design load, 1 time value of inclining of inclined building is cut stake when calculating the rectification value of setting near every batch, when reaching predetermined rectification target, stops anchor cable 10 reinforcings; After anchor cable 10 afterburning values reach design load, when 1 time amount of inclining of building not yet reaches predetermined rectification target, to hydraulic jack 12 unloadings, proceed an operation that cuts of next batch, after section stake operation of this batch is complete, again utilize 12 pairs of anchor cable 10 reinforcings of hydraulic jack, record simultaneously the reading of strain gauge 11 and oil pressure gauge, carry out the vernier control rectification, until reach till the rectification target; After reaching rectification target, the anchor cable 10 of heavy side is less applied prestressing force and is locked on inclined building 1 basis, in case incline again;
D. use and with the concrete of former stake same intensity a plain concrete pile 6 of implementing to cut the stake rectification is carried out embedding and mend, and vibration compacting; With sandy gravel soils entry 4 is carried out the compaction in layers backfill, reserve the twice Grouting Pipe in the time of backfill, carry out secondary grouting and process filling entry 4 after closely knit;
E. use the concrete with raft plate 3 same intensity to fill vertical shaft 2, and be linked to be integral body by bar planting and raft plate 3 bases, guarantee the long-term firm of rectification achievement and building 1.
The method first successful Application in the high-rise building deviation rectifying project proves: the method not only safety is safe, practical; And, overcome the stake forced-landing tilt correcting method of cutting poor controllability in the past, cut the defectives such as blindness that the stake amount is difficult to precisely grasp and cut stake; By reserving adjacent two reservation bands that cut between the stake hole, constantly early warning building returns in the state that inclines in the rectification process, also changed the state that inclines that returns in building, make inclined building less heavy side by pile body demblee form brittle fracture cause prominent heavy, change the slow sedimentation that is caused by the slow property of pile body plastic failure into, effectively avoided inclined building in returning the process of inclining because of the inclined building that " prominent heavy " brings out is toppled over, structural stress is concentrated etc. security risk; And be combined with anchor cable, effectively raise rectification efficient, and strengthened on the whole long-time stability and the shock resistance of building.
Above, describing the specific embodiment of the present invention with reference to the accompanying drawings, is not to limit the invention.Those skilled in the art can understand, in the situation that without departing from the spirit and scope of the present invention, under technology enlightenment provided by the present invention, can also make other equivalent modifications and improvement to the specific embodiment of the present invention, these changes and replacement all drop in claims limited range of the present invention.
Claims (5)
1. interval boring cuts a stake inclination correction method, it is characterized in that, utilizes interval boring to clip the less a part of pile body below the heavy side group plinth cushion cap of building, adjusts relative settlement, prevents that building from producing prominent heavy, and this inclination correction method specifically carries out according to the following steps:
Step 1: along the inclined building length direction of heavy side less, inclined building less heavy side excavate side by side at least two construction wells, the degree of depth of construction well to the inclined building raft plate 1.7～2.0 meters;
Step 2: excavate the main tunnel that connects all construction wells, main tunnel is concordant with the raft panel edges of this inclined building towards a side of inclined building, then from main tunnel, in the basis of inclined building, excavate many entrys perpendicular to main tunnel, so that be positioned at the same entry along the length direction in main tunnel, the per two row concrete piles that begin from the first row concrete pile, entry forms can be for the working space that cuts stake;
Step 3: the maximum according to the inclined building that designs is returned the amount of inclining, according to similar triangle theory, determine in the same row concrete pile from inclined building less heavy side to inclined building how heavy every concrete pile of side cut the stake height, wherein be positioned at inclined building less the stake that cuts of the concrete pile of heavy lateral edges highly be that the maximum settlement of inclined building is poor, the concrete pile that is positioned at many sedimentations of inclined building lateral edges does not cut stake; Take " inclined building less the maximum of heavy side to cut stake highly be that the differential settlement of inclined building is projected as another right-angle side as the base of a right-angle side, building inclination direction on horizontal plane; the base of building inclination direction is hypotenuse " consist of triangle, reduce to scale to cut stake highly by the stake position of single pile place stake row according to the principle of similar triangles; Simultaneously determine the concrete pile that cuts with a collection of according to following principle: if during designing and calculating, every calculating parameter value is definite by testing, then cut in two batches stake, first batch cut stake quantity be inclined building less under the heavy side 75%, second batch of the concrete pile sum be inclined building less under the heavy side 25% of the concrete pile sum; If, for safety then should be divided into three batches and advance cut stake by the experience gained every designing and calculating parameter, first batch cut stake be inclined building less under the heavy side 50%, the second batch of the concrete pile sum be that inclined building sinks 25% of concrete pile sum under the side less; The 3rd batch is that inclined building is less under the heavy side 25% of the concrete pile sum; Be to embody uniformity, i.e. every batch cut stake stake position and on grade level, must be and be evenly arranged; During every batch section stake, adopt interval mode to cut stake;
After can forming for a working space that cuts stake, highly cut a stake operation according to the stake that cuts of the every concrete pile of determining, when cutting stake, in the side by side a plurality of sections stake holes of Drilling of cutting on the stake height and position of every concrete pile, two are cut between the hole and leave the reservation band;
Every batch is cut after stake finishes, and relies on the weight of inclined building self and to carrying out rectification in the anchor cable application of force of less heavy side setting, until reach rectification target;
Step 4: the concrete that adopts the intensity that communicates with the inclined building concrete pile carries out embedding benefit, vibration compacting to the stake hole of cutting on the concrete pile of implementing to cut the stake rectification; After adopting sandy gravel soils compaction in layers backfill entry, again the entry of backfill carried out the secondary grouting processing;
Step 5: use the concrete filling construction well with raft plate same intensity, and be linked to be integral body by bar planting and raft foundation, guarantee the long-term firm of rectification achievement and building; Vertical shaft to excavation adopts 37 lime earth layering rammer to be filled to the nature ground level.
2. interval boring according to claim 1 cuts the stake inclination correction method, it is characterized in that, the construction well in the described step 1 is vertical shaft or inclined shaft; If heavy side place is open less, work plane is enough large for inclined building, then at inclined building heavy side excavation inclined shaft less, this inclined shaft is 2～3 times of inclined building raft plate buried depth apart from the distance of inclined building; If inclined building is heavy side narrow space less, excavating shaft then, vertical shaft can be at inclined building less in the building of heavy side or outside the building.
3. interval boring according to claim 1 and 2 cuts the stake inclination correction method, it is characterized in that, the distance between adjacent two construction wells is 15～30 meters.
4. interval boring according to claim 1 cuts the stake inclination correction method, it is characterized in that, reserving strip width in the described step 3 is 5～20 millimeters.
5. interval boring according to claim 1 cuts the stake inclination correction method, it is characterized in that, the rectification mode that adopts in the described step 3: five principles that in building inclination rectification, must satisfy according to prestress anchorage cable design specifications and prestress anchorage cable in " landslide control engineering technique of design and construction standard ": the 1. ground maximum anchored force that can provide, 2. the basic raft plate concentrated force that can bear, 3. the ground limit rupture load that can bear, 4. the anchor cable pulling force provides back the heeling moment that the square of going all out produces less than inclined building centre-of gravity shift, calculate quantity and the single anchor cable of laying anchor cable stressed, and definite anchorage cable design load;
The pile foundation subsidiary stress that the total load of anchor cable pulling force produces should be not less than last batch and cut the pile foundation subsidiary stress that stake increases, and calculates quantity and the single anchor cable of laying anchor cable stressed, and definite anchorage cable design load.According to design aperture and the length of anchor cable, inclined building less heavy side group plinth carry out anchor cable construction, the anchor cable upper end is positioned at raft plate top, the anchor cable lower end is passed in the good ground that the raft plate stretches into the inclined building ground; Anchor head place erection stress sensor, hydraulic jack and locking device outside the anchor cable on the inclined building basis; Anchor cable, hydraulic jack and coupled electric oil pump consist of afterburner system, consist of dynamometric system by the oil pressure gauge that arranges on strain gauge and the electric oil pump;
Utilize hydraulic jack that anchor cable is carried out loaded and tensioned stage by stage, general per 100～150kN is one-level, every grade adds that to hold the load time be 0.5～1 hour, record simultaneously the reading of oil pressure gauge and strain gauge, check afterburning size, the sedimentation of Real Time Monitoring inclined building and displacement situation, in time feedback information; According to feedback information, when the reinforcing value of anchor cable not yet reaches design load, inclined building returns the value of inclining and cuts stake when calculating the rectification value of setting near every batch, when reaching predetermined rectification target, stops the anchor cable reinforcing; After the afterburning value of anchor cable reaches design load, building returns the amount of inclining and not yet reaches when being scheduled to rectification target, hydraulic jack is unloaded, proceed an operation that cuts of next batch, after section stake operation of this batch is complete, again utilize hydraulic jack afterburning to anchor cable, record simultaneously the reading of strain gauge and oil pressure gauge, carry out the vernier control rectification, until reach till the rectification target; After reaching rectification target, the anchor cable of heavy side is less applied prestressing force and is locked on the inclined building basis, in case incline again.
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| CN105155602A (en) * | 2015-09-11 | 2015-12-16 | 中铁西北科学研究院有限公司 | Multi-support foundation strengthening comprehensive controlling method |
| CN106120881A (en) * | 2016-08-23 | 2016-11-16 | 上海长凯岩土工程有限公司 | A kind of high-rise correcting and then reinforcing device |
| CN106436788A (en) * | 2016-02-29 | 2017-02-22 | 兰州理工大学 | Foundation reinforcement and inclination correction method for friction piles of high-rise building |
| CN108867724A (en) * | 2018-09-20 | 2018-11-23 | 中铁西北科学研究院有限公司 | A kind of inclination correction method based on well shape tunnel boring extracting soil |
| CN109356210A (en) * | 2018-11-21 | 2019-02-19 | 兰州理工大学 | A kind of pile foundation building inclination rectification cuts stake and underpins position limiting structure and its construction method |
| CN109869009A (en) * | 2019-04-04 | 2019-06-11 | 山东建筑大学 | A kind of disconnected column inclination correction method of frame structure building |
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| CN106436788A (en) * | 2016-02-29 | 2017-02-22 | 兰州理工大学 | Foundation reinforcement and inclination correction method for friction piles of high-rise building |
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| CN108867724A (en) * | 2018-09-20 | 2018-11-23 | 中铁西北科学研究院有限公司 | A kind of inclination correction method based on well shape tunnel boring extracting soil |
| CN109356210B (en) * | 2018-11-21 | 2024-05-07 | 兰州理工大学 | Pile foundation building inclination correction pile interception underpinning limiting structure and construction method thereof |
| CN109356210A (en) * | 2018-11-21 | 2019-02-19 | 兰州理工大学 | A kind of pile foundation building inclination rectification cuts stake and underpins position limiting structure and its construction method |
| CN109869009A (en) * | 2019-04-04 | 2019-06-11 | 山东建筑大学 | A kind of disconnected column inclination correction method of frame structure building |
| CN110130423A (en) * | 2019-05-10 | 2019-08-16 | 中国建筑西南勘察设计研究院有限公司 | Existing super high-rise building rectification design method |
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| CN111625886A (en) * | 2020-05-14 | 2020-09-04 | 浙江省建筑设计研究院 | Estimation method for pile cutting quantity and forced landing quantity in inclination correcting process of high-rise building |
| CN111625886B (en) * | 2020-05-14 | 2023-02-14 | 浙江省建筑设计研究院 | Estimation method for pile cutting quantity and forced landing quantity in inclination correcting process of high-rise building |
| CN111794252A (en) * | 2020-07-15 | 2020-10-20 | 中铁九局集团第六工程有限公司 | Construction method for treating high-side rapid slope landslide |
| CN112252105A (en) * | 2020-10-10 | 2021-01-22 | 中铁四院集团工程建设有限责任公司 | Method for treating void at bottom of raft plate of roadbed pile raft structure |
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