CN1760472A - Regulating device for pressure and expansion or contraction deformation of steel shore structure for foundation pit - Google Patents
Regulating device for pressure and expansion or contraction deformation of steel shore structure for foundation pit Download PDFInfo
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- CN1760472A CN1760472A CN 200510094847 CN200510094847A CN1760472A CN 1760472 A CN1760472 A CN 1760472A CN 200510094847 CN200510094847 CN 200510094847 CN 200510094847 A CN200510094847 A CN 200510094847A CN 1760472 A CN1760472 A CN 1760472A
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- worm
- inner support
- outer sleeve
- wire rope
- steel
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Abstract
The present invention relates to a steel supporting pressure deformation and expansion deformation regulation device for foundation pit construction. Said device includes external sleeve barrel and baseplate, said two portions are connected by means of fixing bolts, also includes internal supporting frame barrel and flange, said two portions are connected by means of countersunk headed fixing bolts, between the external sleeve barrel and internal supporting frame barrel are uniformly placed pulley-blocks, the pulleys are symmetrically fixed on the baseplate and internal supporting frame barrel; the worm wheel and worm driving mechanism is positioned outside of external sleeve barrel and baseplate; one end of wire rope is connected with the wormwheel and worm driving mechanism, and another end of the wire rope is passed through the baseplate, winded round the pulley block and connected with motor by means of wormwheel-worm driving mechanism; the motor, wormwheel-worm driving mechanism and temperature sensor as expansion deformation regulation components are fixed on the inner side of internal supporting frame barrel.
Description
Technical field
The present invention is a kind of device that is used for distortion of foundation pit construction steel abutment pressure and swell-shrinking deformation adjusting, belongs to the member technical field that micro-strain is regulated under big pressure.
Background technology
In subway work, the crack of early stage up/down perforation often appears in the concrete of the subway station top board of thickness 60～70cm, under on-the-spot different temperatures, measure and analyze, recognize that its main cause is that the steel that supports diaphragm wall is supported on the bigger strain that the concrete to first age grade section of expanding with heat and contract with cold under the ambient temperature effect causes, thereby make it produce early stage cracking.For addressing this problem, the present invention has designed the device of the specific automatic compensation function with swell-shrinking deformation, will produce good effect to avoiding the subway station top board to ftracture in early days.In addition for reducing because the continuous increase of soil pressure causes the compressive strain (this distortion makes diaphragm wall produce disadvantageous additional internal stress under the soil pressure effect) that steel supports, this device also have compensation this under soil pressure steel support the function that generation is out of shape.
Summary of the invention
Technical problem: the object of the present invention is to provide a kind of foundation ditch steel abutment pressure distortion and swell-shrinking deformation adjusting device, be used to regulate diaphragm wall foundation pit side-wall (or other foundation pit side-walls, as follows) distortion supported of steel, promptly be used to regulate distortion and the steel that the suffered ever-increasing soil pressure of diaphragm wall causes and support the distortion of expanding with heat and contract with cold and causing.
Technical scheme: foundation ditch steel abutment pressure distortion of the present invention and swell-shrinking deformation adjusting device comprise outer sleeve, the base plate as overcoat, inner support tube, flange disc as inner support, as wire rope, assembly pulley, the Worm and worm-wheel gearing of drive part, regulate motor, Worm and worm-wheel gearing, temperature pick up, the power pack of parts as swell-shrinking deformation; Wherein, outer sleeve and base plate two parts are formed by connecting by set bolt, inner support tube and flange disc two parts are formed by connecting by the countersunk head set bolt, the inner support tube is positioned at outer sleeve, by positioning bolt the inner support tube is fixed in the outer sleeve, be provided with assembly pulley equably between the circumference of the sidewall of outer sleeve and inner support tube, every pair of assembly pulley correspondence respectively is fixed on base plate and the inner support tube; Worm and worm-wheel gearing is positioned at outside outer sleeve and the base plate; One of wire rope connects Worm and worm-wheel gearing, and the other end is passed base plate and walked around assembly pulley and link to each other with motor with another Worm and worm-wheel gearing; Motor, Worm and worm-wheel gearing, the temperature pick up of regulating parts as swell-shrinking deformation is fixed on the inboard of inner support tube, and power pack is fixed on the outside of outer sleeve.
Support suffered soil pressure maximum according to calculating the superiors and undermost steel, what pressure changed maximum in work progress is the steel support of the superiors, so supporting to need most, the steel of the superiors use this device to regulate pressure distortion and swell-shrinking deformation, and the serious problems that whether ftracture when being related to the cast of subway station top board of the swell-shrinking deformation that supports of the superiors' steel.The steel of other aspects supports generally can.Estimate that 200 meters long subway stations approximately need more than 60 steel to support and install with this.
Beneficial effect: the distortion that steel supports is caused that by two factors it comprises that distortion and steel that the suffered ever-increasing soil pressure of diaphragm wall causes support the distortion of expanding with heat and contract with cold and causing.The former adjusting makes the excessive internal stress of the unlikely generation of diaphragm wall, and the latter's adjusting guarantees also that except that this function concrete can not ftracture down to the crack that generates up/down perforation because of excessive swell-shrinking deformation takes place variation of ambient temperature in the top board casting process.(crack makes top board infiltration, also make the easy corrosion of reinforcing bar and influence its application life)
Description of drawings
Fig. 1 is the structural representation of distortion of steel abutment pressure and swell-shrinking deformation adjusting device.Wherein have: outer sleeve 1-1, base plate 1-2, inner support tube 2-1, flange disc 2-2, wire rope 3, assembly pulley 4, Worm and worm-wheel gearing 5, positioning bolt 6, set bolt 7, countersunk head set bolt 8, motor 9-1, Worm and worm-wheel gearing 9-2, temperature pick up 9-3, power pack 9-4.
Fig. 2 be among Fig. 1 A-A to the sectional structure schematic diagram.
The specific embodiment
Fig. 1 is distortion of foundation ditch steel abutment pressure and swell-shrinking deformation adjusting device (hereinafter to be referred as the deformation adjustment device), and this device two ends and steel support and join during use.This device comprises outer sleeve 1-1, the base plate 1-2 as overcoat, inner support tube 2-1, flange disc 2-2 as inner support, as wire rope 3, assembly pulley 4, the pulley drive mechanism 5 of drive part, regulate motor 9-1, Worm and worm-wheel gearing 9-2, temperature pick up 9-3, the power pack 9-4 of parts as swell-shrinking deformation; Wherein, outer sleeve 1-1 and base plate 1-2 two parts are formed by connecting by set bolt 7, inner support tube 2-1 and flange disc 2-2 two parts are formed by connecting by countersunk head set bolt 8, inner support tube 2-1 is positioned at outer sleeve 1-1, by positioning bolt 6 inner support tube 2-1 is temporarily fixed in the outer sleeve 1-1 during installation, be provided with assembly pulley 4 between the circumference of the sidewall of base plate 1-2 and inner support tube 2-1, assembly pulley 4 comprises 30 pulleys that are fixed on equably respectively on base plate 1-2 and the inner support tube 2-1; Worm and worm-wheel gearing 5 is positioned at outside outer sleeve 1-1 and the base plate 1-2; One of wire rope 3 connects Worm and worm-wheel gearing 5, and the other end is passed base plate 1-2 and walked around assembly pulley 4 and be connected with Worm and worm-wheel gearing 9-2; Regulate the motor 9-1 of parts, the inboard that Worm and worm-wheel gearing 9-2 is fixed on inner support tube 2-1 as swell-shrinking deformation, temperature pick up 9-3, power pack 9-4 are fixed on the outside of outer sleeve 1-1.
The pressure that assembly pulley 4 supports steel is distributed in fifty-fifty around on 30 times the wire rope, make the suffered transmission power of wire rope obtain primary reduction (pull of steel wire be steel abutment pressure 1/60), and wire rope flexible regulated this device to become possibility.Worm and worm-wheel gearing 5 has reduced transmission power again, makes the operator only need apply very little power and just can resist up to a hundred tons support force.Worm and worm-wheel gearing 9-2 has reduced equally again only needs the very little motor of torque when transmission power makes the distortion of regulating the Yin Wendu generation.Temperature pick up 9-3: promptly temperature signal is converted into current signal, is translated into the correspondent voltage signal again with a temperature sensing circuit.This voltage signal is passed to stepper motor (or servomotor) more then, makes motor make corresponding action, makes this adjusting device " pyrocondensation cold expanding ", supports the distortion of expanding with heat and contract with cold and causing automatically to compensate steel.
Suppose that the distance as Fig. 1 left and right sides pulley center is 40cm (can require to adjust according to the designer), center to center distance is 3cm during the wire rope work on pulley both sides, stressed wire rope always be about (0.4 * 2+3.1416 * 0.03) * 30 ≌ 27m.
The total pulling force of force analysis wire rope equals steel abutment pressure F (t), it is calculated that stressed F (t) excursion of the superiors' steel support is very big, can be more than from 0 to 100 ton.If it is F that steel supports maximum pressure
Max=100t.If select 12.5mm wire rope, total basal area for use is 57.27mm
2, if wire rope nominal tensile strength is 140kg/mm
2(or 200kg/mm
2), disrumpent feelings pressure summation is 8010 (or 11450kg), safety factor is 4.80 (or 6.87).
The displacement of adjusting pressure resets and when using wire rope is installed, and left side lock(ing) bolt 6 among the figure (3 get final product) is transferred to the appropriate location, and the reservation spacing δ (Fig. 1) of overcoat 1 and inner support 2 is equated everywhere, reserves the about 7～10mm of spacing δ and is advisable.The handle that links to each other with worm screw of rocking-turn Worm and worm-wheel gearing 5 applies a precompression F ', (because the support force that steel supports when installing is very little, as less than 1t), the available spring spanner application of force is extrapolated the tension force of wire rope according to the size of moment, is locked then.Steel just loosens lock(ing) bolt 6 after supporting and being installed on the diaphragm wall, and this moment, steel supported in running order.Along with foundation ditch digs deeply, when steel supported stressed increases, steel supported compressive strain, and wire rope internal force also can increase simultaneously, caused two diaphragm wall relative displacements to increase (define the mutually close displacement of two diaphragm walls for just).If the elastic modulus E of steel=2.1 * 10
6Kg/cm
2, 100 tons of pressure can make the steel of long 20m, external diameter 62cm, thick 1.6cm support compression 3.1mm.In the foundation pit construction process, the pressure that steel supports increases gradually, and the handle that can shake Worm and worm-wheel gearing 5 tightens up wire rope 3, and the diaphragm wall displacement that makes steel support two ends returns to zero-bit.(from zero load to 100 ton pressure, wire rope accumulative total tightens up 3.1 * 60=186mm).Here suppose that the modulus of elasticity that steel supports equates (can demarcate during actual the use) with macroscopical modulus of elasticity (apparent modulus ofelasticity of rope) of wire rope.
Regulate load wire rope 3 and link to each other with Worm and worm-wheel gearing 5, operating personnel can regulate the load of wire rope 3 easily with the handle rotary worm.As the distance of establishing wirerope axis center and wire rope center is 4cm, the radius of travelling gear is 6cm, the gearratio of Worm and worm-wheel gearing is 50, operating personnel's application of force handle is 40cm, the load of wire rope is exactly 1.67t when acting on 2.22kg power on the handle, and the gross pressure of steel support at this moment just reaches 100t.(do not consider the mechanical efficiency of assembly pulley here, if mechanical efficiency is 70%, active force will be 3.2kg, will be very light when operating personnel operate like this.)
The pyrocondensation cold expanding is regulated swell-shrinking deformation automatically and is extended 1.18 * 10-5 * 20 * 15=0.00354m (3.54mm) when expanding as supporting when steel to be heated 15 ℃, temperature pick up 9-2 (can be three of overcoat 1 inwall disposed at equal distance, average) be temperature signal to be converted into current signal with a temperature sensing circuit, be converted into the correspondent voltage signal again.This voltage signal is passed to stepper motor (or servomotor) more then, and the motor-driven worm screw drives worm gear, passes to the wire rope 3 around wirerope axis by a pair of gear (gear ratio is determined according to the static torque of motor) again, and wire rope 3 is loosened.Be heated 15 ℃ when having extended 3.54mm when expanding when steel supports, wire rope 3 just loosens, and the deformation adjustment device makes δ shorten 3.54mm, and wire rope 3 general extensions should be 3.54 * 60=212.4mm.So just compensated steel and supported the length elongation (otherwise when steel supported cooling, wire rope 3 tightened up) that causes because of being heated, steel support and length overall total length in process of expansion and contraction of deformation adjustment device are remained unchanged.Wire rope always is about 27 meters, continuously by all pulleys, so when Worm and worm-wheel gearing 5 or motor 9-1 tightened up wire rope 3 by Worm and worm-wheel gearing 9-2, the stress of wire rope 3 was equal everywhere.The situation of eccentric force can not take place.
Motor 9-1 can select stepper motor or servomotor for use, their function is close, and motor links to each other with wire rope 3 by Worm and worm-wheel gearing 9-2, and is less demanding to action response speed etc., but be easier to lose the step, consider to select for use stepper motor more worthwhile from the angle of economy.Consider that as the designer I﹠M is convenient, 9-1,9-2,9-3 also can be contained in the outside (as Worm and worm-wheel gearing 5) of overcoat 1.This device uses the worm and gear transmission, has that gearratio is big, stable drive, noiseless, has the advantage of self-locking performance.
Adjust in the explanation Excavation Process, the suffered lateral earth pressure of diaphragm wall constantly increases.At this moment will constantly adjust (tightening up wire rope) with Worm and worm-wheel gearing 5 according to the variation of diaphragm wall displacement remains unchanged the diaphragm wall displacement.Because the precision of at present general laser ranging still is difficult to meet the demands (the highest precision is 1mm, can discern the time of 3ps), can use (indium) invar tape of band vernier device to measure usually.Because expanding with heat and contract with cold of invar tape self can bring very big error, thus will with measure under all scene temperature length be converted into the relative displacement that the equivalent length of (as 20 ℃) under a certain temperature calculates foundation pit walls (diaphragm wall).Swell-shrinking deformation is regulated parts work automatically when extraneous variations in temperature, does not need manual intervention, can guarantee that the relative displacement between the diaphragm wall is constant under the situation of variation of ambient temperature.Motor 9-1, temperature pick up 9-3 that Worm and worm-wheel gearing 5,9-2 and swell-shrinking deformation are regulated parts 9 can order to relevant specialized company by instructions for use.
Claims (2)
1. a steel abutment pressure is out of shape and the swell-shrinking deformation adjusting device, it is characterized in that this device comprises outer sleeve (1-1), the base plate (1-2) as overcoat, inner support tube (2-1), flange disc (2-2) as inner support, as wire rope (3), assembly pulley (4), the pulley drive mechanism (5) of drive part, regulate motor (9-1), Worm and worm-wheel gearing (9-2), temperature pick up (9-3), the power pack (9-4) of parts as swell-shrinking deformation; Wherein, outer sleeve (1-1) and base plate (1-2) two parts are formed by connecting by set bolt (7), inner support tube (2-1) and flange disc (2-2) two parts are formed by connecting by countersunk head set bolt (8), inner support tube (2-1) is positioned at outer sleeve (1-1), by positioning bolt (6) inner support tube (2-1) is fixed in the outer sleeve (1-1), evenly be provided with assembly pulley (4) between the circumference of the sidewall of outer sleeve (1-1) and inner support tube (2-1), the pulley of assembly pulley (4) is fixed on base plate (1-2) and the inner support tube (2-1) symmetrically; Pulley drive mechanism (5) is positioned at outside outer sleeve (1-1) and the base plate (1-2); One of wire rope (3) connects Worm and worm-wheel gearing (5), and the other end is passed base plate (1-2) and walked around assembly pulley (4) and link to each other with motor (9-1) by Worm and worm-wheel gearing (9-2); Motor (9-1), Worm and worm-wheel gearing (9-2), the temperature pick up (9-3) of regulating parts as swell-shrinking deformation is fixed on the inboard of inner support tube (2-1), and power pack (9-4) is fixed on the outside of outer sleeve (1-1).
2. steel abutment pressure distortion according to claim 1 and swell-shrinking deformation adjusting device, it is characterized in that assembly pulley (4) is respectively by forming with 60 pulleys that are connected overcoat (1) and inner support (2), wherein 30 pulleys are connected with overcoat (1), other 30 pulleys are connected with inner support (2), and pulley is in the position of five equilibrium on circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100948471A CN100368635C (en) | 2005-10-17 | 2005-10-17 | Regulating device for pressure and expansion or contraction deformation of steel shore structure for foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100948471A CN100368635C (en) | 2005-10-17 | 2005-10-17 | Regulating device for pressure and expansion or contraction deformation of steel shore structure for foundation pit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1760472A true CN1760472A (en) | 2006-04-19 |
| CN100368635C CN100368635C (en) | 2008-02-13 |
Family
ID=36706683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100948471A Expired - Fee Related CN100368635C (en) | 2005-10-17 | 2005-10-17 | Regulating device for pressure and expansion or contraction deformation of steel shore structure for foundation pit |
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| Country | Link |
|---|---|
| CN (1) | CN100368635C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101853026A (en) * | 2010-05-21 | 2010-10-06 | 上海建工（集团）总公司 | Mobile diagnostic system device of deep foundation pit steel support axial-force adaptive system |
| CN103255784A (en) * | 2013-04-26 | 2013-08-21 | 同济大学 | Steel support temperature deforming adjuster |
| CN105350497A (en) * | 2015-11-26 | 2016-02-24 | 华北水利水电大学 | Automatic deformation adjusting device for steel face plate dam |
| CN105970971A (en) * | 2016-06-13 | 2016-09-28 | 上海岩土工程勘察设计研究院有限公司 | Temperature control type axial force compensation method for concrete supports of deep foundation pits |
| CN106013163A (en) * | 2016-06-13 | 2016-10-12 | 上海岩土工程勘察设计研究院有限公司 | Temperature-controlled type axial force compensation method for concrete supports of deep foundation pit |
| CN107288659A (en) * | 2017-08-15 | 2017-10-24 | 中铁十局集团第工程有限公司 | Tunnel double-lining chassis deformation monitoring device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63528A (en) * | 1986-06-20 | 1988-01-05 | Marukiyou Koumushiyo:Kk | Supporting and take-down type structure for shore strut |
| CN1048580A (en) * | 1990-03-21 | 1991-01-16 | 汤文海 | Telescopic flexible metal shield |
| JPH0819832B2 (en) * | 1991-10-24 | 1996-02-28 | 鹿島建設株式会社 | Supporting and assembling method of tunnel excavator |
| DE4209675C1 (en) * | 1992-03-25 | 1993-07-15 | Teska Verbautechnik Gmbh, 4200 Oberhausen, De | |
| CN2466217Y (en) * | 2000-03-20 | 2001-12-19 | 彭高培 | Combined top bracing self-supporting supporting structure |
| CN2428573Y (en) * | 2000-05-07 | 2001-05-02 | 余波 | Concrete-lining building trolley supported by connection lever mechanism |
| JP3772657B2 (en) * | 2000-09-05 | 2006-05-10 | 鹿島建設株式会社 | Sliding mountain retaining system |
| CN2846504Y (en) * | 2005-10-17 | 2006-12-13 | 东南大学 | Regulator for base pit steel support deformation |
-
2005
- 2005-10-17 CN CNB2005100948471A patent/CN100368635C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101853026A (en) * | 2010-05-21 | 2010-10-06 | 上海建工（集团）总公司 | Mobile diagnostic system device of deep foundation pit steel support axial-force adaptive system |
| CN103255784A (en) * | 2013-04-26 | 2013-08-21 | 同济大学 | Steel support temperature deforming adjuster |
| CN105350497A (en) * | 2015-11-26 | 2016-02-24 | 华北水利水电大学 | Automatic deformation adjusting device for steel face plate dam |
| CN105350497B (en) * | 2015-11-26 | 2017-04-05 | 华北水利水电大学 | Steel facing dam adjust automatically deformation device |
| CN105970971A (en) * | 2016-06-13 | 2016-09-28 | 上海岩土工程勘察设计研究院有限公司 | Temperature control type axial force compensation method for concrete supports of deep foundation pits |
| CN106013163A (en) * | 2016-06-13 | 2016-10-12 | 上海岩土工程勘察设计研究院有限公司 | Temperature-controlled type axial force compensation method for concrete supports of deep foundation pit |
| CN107288659A (en) * | 2017-08-15 | 2017-10-24 | 中铁十局集团第工程有限公司 | Tunnel double-lining chassis deformation monitoring device |
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| CN100368635C (en) | 2008-02-13 |
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Granted publication date: 20080213 Termination date: 20101017 |