CN108396759A - Open caisson deviation rectification construction method is tilted in the case of different soil properties - Google Patents

Open caisson deviation rectification construction method is tilted in the case of different soil properties Download PDF

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CN108396759A
CN108396759A CN201810252386.3A CN201810252386A CN108396759A CN 108396759 A CN108396759 A CN 108396759A CN 201810252386 A CN201810252386 A CN 201810252386A CN 108396759 A CN108396759 A CN 108396759A
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equal
less
water injection
injection pressure
open caisson
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CN108396759B (en
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叶香雄
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E02D23/08—Lowering or sinking caissons
    • E02D23/14—Decreasing the skin friction while lowering
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E02D23/08—Lowering or sinking caissons
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D23/00—Caissons; Construction or placing of caissons
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
    • E02D35/005—Lowering or lifting of foundation structures

Abstract

The invention discloses tilt open caisson deviation rectification construction method in the case of a kind of different soil properties, it is characterized in that the side setting forced landing hole slow in well sinking, forced landing bore dia is 75~120mm, forced landing pitch of holes is 1.5~2.2m, in the fast side setting lifting hole of well sinking, lifting bore dia is 60~90mm, lifting pitch of holes is 1.8~2.5m, lifting hole depth is 2.2~2.5 times of open caisson height, hole is lifted using two rows of, it is lifted hole and injects cement mortar, the cement mortar ratio of mud is 0.45~0.5, and cement mortar mixes calcium sulphoaluminate class swelling agent；Correction sequence is first to force-land, then be lifted, and forced landing or lifting are all made of information-aided construction.

Description

Open caisson deviation rectification construction method is tilted in the case of different soil properties
Technical field
The present invention relates to deviation rectification construction method, more particularly to open caisson deviation rectification construction party is tilted in the case of a kind of different soil properties Method.
Background technology
It is susceptible to inclination during open caisson construction, to be rectified a deviation after inclination of open caisson, traditional open caisson deviation rectification method has digging Local method and increase external loads method, excavation method are cut the earth to the slow one side that sinks more, increase the gap between caisson cutting edge and soil, Promote its sinking.To sinking, fast one side is optionally cut the earth less, is not cut the earth or mound and heap rammed earth, and sinking frictional resistance is increased, Slow down subsidence velocity.It is to increase load in the slow side of well sinking, while being hollowed out under its cutting shoe to increase external loads method, with Profit overcomes frictional resistance to correct deflection.The problems of these traditional technologies are difficult to control in work progress, and correction is easy It exceeds the proper limits in righting a wrong.
Invention content
It is heavy the purpose of the present invention is to provide being tilted in the case of a kind of different soil properties for the deficiencies in the prior art Well deviation rectification construction method ensures rectifying effect.
The present invention side setting forced landing hole slow in well sinking, forced landing bore dia is 75~120mm, and forced landing pitch of holes is 1.5~2.2m, forming forced landing hole using bore mode makes caisson wall be reduced with its surrounding soil frictional force, in boring procedure Continuous water filling makes well sinking, instructs correction technique using intelligent control method, drilling machine drilling speed and water injection pressure are according to soil property It is adjusted with correction rate.
In the fast side setting lifting hole of well sinking, lifting bore dia is 60~90mm, lifting pitch of holes for 1.8~ 2.5m, lifting hole depth are 2.2~2.5 times of open caisson height, and lifting hole is using two rows, and two rows lifting hole arrangement parameters are using such as Under：First row lifting hole is vertical, and it is 500~700mm that first row, which is lifted hole from open caisson Edge Distance, and second row lifting hole is to incline Tiltedly, gradient is 60~70 degree, and gradient refers to lifting hole and horizontal angle here, and second row is lifted hole from open caisson edge Distance is 1000~1200mm；Two rows lifting hole arrangement parameter can also use as follows：It is to tilt that first row, which is lifted hole, gradient It it is 60~70 degree, it is 1000~1200mm that first row, which is lifted hole from open caisson Edge Distance, and it is to tilt that second row, which is lifted hole, gradient It it is 60~70 degree, second row is lifted hole and first row lifting hole parallel arrangement, and second row lifting hole is from open caisson Edge Distance 1500~1700mm；It is lifted hole and injects cement mortar, the cement mortar ratio of mud is 0.45~0.5, and it is swollen that cement mortar mixes calcium sulphoaluminate class Swollen dose, enters after the soil body mixed with the cement mortar of calcium sulphoaluminate class swelling agent and will appear hydration reaction, foundation soil body in hydration process Product expansion generates lifting force to open caisson, and the volume of calcium sulphoaluminate class swelling agent is directly related with the lifting force of open caisson, mixed with sulphur aluminium The cement mortar of sour calcium class swelling agent has not only acted as the effect of expansion lifting after entering the soil body, and plays compacted compacting and make With with the setting expansion of the cement mortar of calcium sulphoaluminate class swelling agent, foundation soil body compactness obviously increases, and compressibility reduces. The volume of calcium sulphoaluminate class swelling agent is determined according to Uplifting amount, when Uplifting amount is greater than or equal to 100mm, the expansion of calcium sulphoaluminate class The volume of agent is 7%；When Uplifting amount is more than 50mm and is less than 100mm, the volume of calcium sulphoaluminate class swelling agent is 6%；Uplifting amount When less than 50mm, the volume of calcium sulphoaluminate class swelling agent is 5%.
Correction sequence is first to force-land, then be lifted, and forced landing or lifting are all made of information-aided construction, at the top of open caisson Cloth displacement sensor, displacement sensor is connect with computer carries out intelligent control, and displacement sensor transfers data to electricity immediately Brain, computer draw a curve according to the data of the acquisition 2mm that often sinks or be lifted, and provide correction rate according to the slope of curve, Analysis correction development trend.
Penetration rate and water injection pressure are adjusted according to soil property and fall rate in forced landing work progress, when open caisson bottom For muck soil, when fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 120r/min and is more than 110r/min, water injection pressure 1.3MPa；When the soil property that drills is muck soil, fall rate is more than 0.02mm/min and is less than When 0.03mm/min, drilling machine drilling speed is less than or equal to 110r/min and is more than 100r/min, water injection pressure 1.3MPa；Work as drilling Soil property be muck soil when, fall rate be greater than or equal to 0.03mm/min when, drilling machine drilling speed be less than or equal to 100r/min and More than 90r/min, water injection pressure 1.3MPa；
When open caisson bottom is clay, and fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 90r/min and be more than 80r/min, water injection pressure 1.2MPa；When drilling soil property is clay, fall rate is more than 0.02mm/min And when less than 0.03mm/min, drilling machine drilling speed is less than or equal to 80r/min and is more than 75r/min, water injection pressure 1.2MPa；When Drilling soil property is clay, and when fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed is less than or equal to 75r/min and is more than 70r/min, water injection pressure 1.2MPa；
When open caisson bottom is silt, and fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 70r/min and be more than 65r/min, water injection pressure 1.1MPa；When drilling soil property is silt, fall rate is more than 0.02mm/min And when less than 0.03mm/min, drilling machine drilling speed is less than or equal to 65r/min and is more than 60r/min, water injection pressure 1.1MPa；When Drilling soil property is silt, and when fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed is less than or equal to 60r/min and is more than 55r/min, water injection pressure 1.1MPa；
When open caisson bottom is sand, and fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 55r/min and be more than 50r/min, water injection pressure 1.0MPa；When drilling soil property is sand, fall rate is more than 0.02mm/min And when less than 0.03mm/min, drilling machine drilling speed is less than or equal to 50r/min and is more than 45r/min, water injection pressure 1.0MPa；When Drilling soil property is sand, and when fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed is less than or equal to 45r/min and is more than 40r/min, water injection pressure 1.0MPa；
In silt or sand, open caisson can be difficult to, and following technical measures may be used：Pass through note after pore-forming Water of the pipe injection mixed with montmorillonite is starched, passes through Grouting Pipe injection hole at once after 1%~2% montmorillonite is mixed in water In, the bead that a diameter of 3~5mm is expanded to after montmorillonite access aperture is attached to open caisson wall, and sliding friction is made to become rolling Friction, reduces hole wall frictional force, is conducive to correction and tells on.If geology there are drifting sand layer, incorporation 2%~3% it is pure Alkali improves slurry consistency, and increase receives ion to change the sub- hydrating capacity of grogs.
Using interval construction, i.e. first construction finishes the lifting hole of odd indexed, then the lift for even number serial number of constructing for lifting construction Hole is risen, serial number carries out layout from left to right, prevents adjacent lifting hole from being starched because pitch-row closely influences each other or be lifted hole in construction excessively Liquid expansive force discharges and influences correcting and then reinforcing effect.Pass through the interval of 20~30min after the lifting hole construction of odd indexed The lifting hole for even number serial number of constructing again after time, it is therefore an objective to which allowing swelling stress to obtain certain release ensures rectifying effect.
The present invention has the advantages that rectifying effect is good, safe and reliable, has preferable application prospect.
Description of the drawings
Fig. 1 is open caisson deviation rectification horizontal layout schematic diagram one, and Fig. 2 is open caisson deviation rectification facade arrangement schematic diagram one, and Fig. 3 is open caisson Horizontal layout of rectifying a deviation schematic diagram two, Fig. 4 are open caisson deviation rectification facade arrangement schematic diagram two.
Attached drawing mark：1, it force-lands hole, 2, lifting hole, 3, open caisson.
Specific implementation mode
The present embodiment is described in detail below in conjunction with attached drawing.
Embodiment one
Fig. 1 is open caisson deviation rectification horizontal layout schematic diagram one, and Fig. 2 is open caisson deviation rectification facade arrangement schematic diagram one.The present embodiment Forced landing hole 1 is set in the side that open caisson 3 sinks slow, force-land 1 a diameter of 80mm of hole, and forced landing 1 spacing of hole is 1.7m, using drilling side Formula, which forms forced landing hole 1, makes 3 borehole wall of open caisson and its surrounding soil frictional force reduce, in boring procedure continuous water filling make under open caisson 3 It is heavy, instruct correction technique, drilling machine drilling speed and water injection pressure to be adjusted according to soil property and correction rate using intelligent control method It is whole.
Lifting hole 2 is set in the side that open caisson 3 sinks fast, is lifted 2 a diameter of 70mm of hole, lifting 2 depth of hole is 2.2 times heavy 3 height of well, lifting 2 spacing of hole are 2m, and lifting hole 2 is using two rows, and two rows lifting 2 arrangement parameter of hole is using as follows：First row is lifted It is vertical to rise hole 2, and it is 600mm that first row, which is lifted hole 2 from 3 Edge Distance of open caisson, and it is to tilt that second row, which is lifted hole 2, and gradient is 65 degree, it is 1100mm that second row, which is lifted hole 2 from 3 Edge Distance of open caisson,；It is lifted hole 2 and injects cement mortar, the cement mortar ratio of mud is 0.45, cement mortar mixes calcium sulphoaluminate class swelling agent.Uplifting amount is 70mm, and the volume of calcium sulphoaluminate class swelling agent is 6%.
Correction sequence is first to force-land, then be lifted, and forced landing or lifting are all made of information-aided construction, is pushed up in open caisson 3 Portion's cloth displacement sensor, displacement sensor is connect with computer carries out intelligent control, and displacement sensor transfers data to immediately Computer, computer according to the data of acquisition often sink or be lifted 2mm draw a curve, and according to the slope of curve provide correction speed Rate, analysis correction development trend.
Penetration rate and water injection pressure are adjusted according to soil property and fall rate in forced landing work progress, 3 bottom of open caisson For clay, when fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 90r/min and is more than 80r/min, Water injection pressure is 1.2MPa；When fall rate is more than 0.02mm/min and is less than 0.03mm/min, drilling machine drilling speed is less than or equal to 80r/min and be more than 75r/min, water injection pressure 1.2MPa；When fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed Less than or equal to 75r/min and it is more than 70r/min, water injection pressure 1.2MPa；
Using interval construction, i.e. first construction finishes the lifting hole 2 of odd indexed, then the lift for even number serial number of constructing for lifting construction Hole 2 is risen, serial number carries out layout from left to right.The intermittent time of 20~30min is passed through in the lifting hole 2 of odd indexed after constructing The lifting hole 2 for even number serial number of constructing again afterwards.
Embodiment two
Fig. 3 is open caisson deviation rectification horizontal layout schematic diagram two, and Fig. 4 is open caisson deviation rectification facade arrangement schematic diagram two.
Forced landing hole 1 is arranged in the side that open caisson 3 sinks slow in the present embodiment, and force-land 1 a diameter of 80mm of hole, 1 spacing of hole of force-landing For 1.7m, forming forced landing hole 1 using bore mode makes 3 borehole wall of open caisson be reduced with its surrounding soil frictional force, in boring procedure Continuous water filling makes open caisson 3 sink, and instructs correction technique using intelligent control method, drilling machine drilling speed and water injection pressure are according to soil property It is adjusted with correction rate.
Lifting hole 2 is set in the side that open caisson 3 sinks fast, is lifted 2 a diameter of 70mm of hole, lifting 2 depth of hole is 2.3 times heavy 3 height of well, lifting 2 spacing of hole are 2m, and lifting hole 2 is using two rows, and two rows lifting 2 arrangement parameter of hole is using as follows：First row is lifted It is to tilt to rise hole 2, and gradient is 65 degree, and it is 1100mm that first row, which is lifted hole 2 from 3 Edge Distance of open caisson, and second row lifting hole 2 is It tilts, gradient is 65 degree, and second row is lifted hole 2 and first row lifting hole 2 and is arranged in parallel, and second row is lifted hole 2 from 3 side of open caisson Edge distance is 1600mm；It is lifted hole 2 and injects cement mortar, the cement mortar ratio of mud is 0.45, and cement mortar mixes the expansion of calcium sulphoaluminate class Agent.Uplifting amount is 70mm, and the volume of calcium sulphoaluminate class swelling agent is 6%.
Correction sequence is first to force-land, then be lifted, and forced landing or lifting are all made of information-aided construction, is pushed up in open caisson 3 Portion's cloth displacement sensor, displacement sensor is connect with computer carries out intelligent control, and displacement sensor transfers data to immediately Computer, according to the data of acquisition, often sinking 2mm draws a curve to computer, and provides correction rate according to the slope of curve, analyzes Correction development trend.
Penetration rate and water injection pressure are adjusted according to soil property and fall rate in forced landing work progress, 3 bottom of open caisson For clay, when fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 90r/min and is more than 80r/min, Water injection pressure is 1.2MPa；When fall rate is more than 0.02mm/min and is less than 0.03mm/min, drilling machine drilling speed is less than or equal to 80r/min and be more than 75r/min, water injection pressure 1.2MPa；When fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed Less than or equal to 75r/min and it is more than 70r/min, water injection pressure 1.2MPa；
Using interval construction, i.e. first construction finishes the lifting hole 2 of odd indexed, then the lift for even number serial number of constructing for lifting construction Hole 2 is risen, serial number carries out layout from left to right.The intermittent time of 20~30min is passed through in the lifting hole 2 of odd indexed after constructing The lifting hole 2 for even number serial number of constructing again afterwards.

Claims (1)

1. open caisson deviation rectification construction method is tilted in the case of a kind of difference soil property, it is characterized in that compeling in the slow side setting of well sinking Hole drops, and forced landing bore dia is 75~120mm, and forced landing pitch of holes is 1.5~2.2m, and forming forced landing hole using bore mode makes open caisson The borehole wall and its surrounding soil frictional force are reduced, in boring procedure continuous water filling make well sinking, using intelligent control method come Correction technique, drilling machine drilling speed and water injection pressure is instructed to be adjusted according to soil property and correction rate；
In the fast side setting lifting hole of well sinking, lifting bore dia is 60~90mm, and lifting pitch of holes is 1.8~2.5m, Lifting hole depth is 2.2~2.5 times of open caisson height, and cement mortar is injected in lifting hole using two rows, lifting hole, and the cement mortar ratio of mud is 0.45~0.5, cement mortar mixes calcium sulphoaluminate class swelling agent；
Correction sequence is first to force-land, then be lifted, and forced landing or lifting are all made of information-aided construction, in open caisson top layout Displacement sensor, displacement sensor is connect with computer carries out intelligent control, and displacement sensor transfers data to computer immediately, electricity Brain draws a curve according to the data of the acquisition 2mm that often sinks or be lifted, and provides correction rate according to the slope of curve, analysis is entangled Inclined development trend；
Penetration rate and water injection pressure are adjusted according to soil property and fall rate in forced landing work progress, when open caisson bottom is to become silted up Shale soil, when fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 120r/min and is more than 110r/ Min, water injection pressure 1.3MPa；When the soil property that drills is muck soil, fall rate is more than 0.02mm/min and is less than When 0.03mm/min, drilling machine drilling speed is less than or equal to 110r/min and is more than 100r/min, water injection pressure 1.3MPa；Work as drilling Soil property be muck soil when, fall rate be greater than or equal to 0.03mm/min when, drilling machine drilling speed be less than or equal to 100r/min and More than 90r/min, water injection pressure 1.3MPa；
When open caisson bottom is clay, and fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 90r/min And it is more than 80r/min, water injection pressure 1.2MPa；When drilling soil property is clay, fall rate is more than 0.02mm/min and is less than When 0.03mm/min, drilling machine drilling speed is less than or equal to 80r/min and is more than 75r/min, water injection pressure 1.2MPa；When drilling soil Matter is clay, and when fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed is less than or equal to 75r/min and is more than 70r/ Min, water injection pressure 1.2MPa；
When open caisson bottom is silt, and fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 70r/min And it is more than 65r/min, water injection pressure 1.1MPa；When drilling soil property is silt, fall rate is more than 0.02mm/min and is less than When 0.03mm/min, drilling machine drilling speed is less than or equal to 65r/min and is more than 60r/min, water injection pressure 1.1MPa；When drilling soil Matter is silt, and when fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed is less than or equal to 60r/min and is more than 55r/ Min, water injection pressure 1.1MPa；
When open caisson bottom is sand, and fall rate is less than or equal to 0.02mm/min, drilling machine drilling speed is less than or equal to 55r/min And it is more than 50r/min, water injection pressure 1.0MPa；When drilling soil property is sand, fall rate is more than 0.02mm/min and is less than When 0.03mm/min, drilling machine drilling speed is less than or equal to 50r/min and is more than 45r/min, water injection pressure 1.0MPa；When drilling soil Matter is sand, and when fall rate is greater than or equal to 0.03mm/min, drilling machine drilling speed is less than or equal to 45r/min and is more than 40r/ Min, water injection pressure 1.0MPa.
CN201810252386.3A 2016-11-17 2016-11-17 Deviation rectifying construction method for inclined open caisson under different soil conditions Active CN108396759B (en)

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CN201611062968.2A CN106592615B (en) 2016-11-17 2016-11-17 Tilt open caisson deviation rectification construction method
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CN201810252386.3A Active CN108396759B (en) 2016-11-17 2016-11-17 Deviation rectifying construction method for inclined open caisson under different soil conditions
CN201810252458.4A Active CN108360545B (en) 2016-11-17 2016-11-17 It tilts open caisson and combines deviation rectification construction method
CN201810252548.3A Active CN108396760B (en) 2016-11-17 2016-11-17 Combined deviation-rectifying construction technology for inclined open caisson
CN201611062968.2A Active CN106592615B (en) 2016-11-17 2016-11-17 Tilt open caisson deviation rectification construction method
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CN110144921A (en) * 2019-06-06 2019-08-20 广东水利电力职业技术学院（广东省水利电力技工学校） A kind of simple and efficient open caisson deviation rectification method

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CN108396758B (en) 2020-02-21
CN108396760A (en) 2018-08-14
CN108360545A (en) 2018-08-03
CN106592615A (en) 2017-04-26
CN108396760B (en) 2020-02-04
CN108360545B (en) 2019-09-10
CN108487278A (en) 2018-09-04
CN106592615B (en) 2018-08-07
CN108396758A (en) 2018-08-14

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