CN103031792B - The method of the existing highway subgrade sedimentation of a kind of lifting and device thereof - Google Patents
The method of the existing highway subgrade sedimentation of a kind of lifting and device thereof Download PDFInfo
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Abstract
The invention provides method and the device thereof of the existing highway subgrade sedimentation of a kind of lifting, in the section of the uneven sedimentation of highway subgrade, road surface and the following certain distance of ground contact interface, by the position of designing requirement, quantity successively to level in roadbed insert multiple can the tabular lifting device of one-dimensional expansion, by the order of each lifting device by designing requirement, spreading rate, expansion amplitude is vertically expanded step by step, the roadbed lifting of depression is made to return to roadbed design desired value, then the block materials with injected hole with sufficient intensity is adopted to replace each tabular lifting device successively, and inject appropriate known gel rubber material and make to be full of the hole that the gap of block materials and lifting process formed at soil, realize the object of the existing highway subgrade roadbed subsidence of lifting.
Description
Technical field
The invention belongs to road and bridge construction engineering technical field, relate to method and the device thereof of the existing highway subgrade sedimentation of a kind of lifting.
Background technology
Settlement of subgrade is one of Common Diseases of subgrade construction, and at home and abroad ubiquity in highway, is not all effectively solved for a long time.Settlement of subgrade will inevitably cause the out-of-flatness on road surface, the differential settlement etc. that main manifestations is seam step, end of the bridge or culvert two ends roadbed subsidence, local subgrade defect cause.
Many road-surface problem harm that settlement of subgrade causes is very large, and it constrains, and highway is quick, comfortable, the performance of safe integral function, even causes the major traffic accidents of car crash.The maintenance simultaneously also increasing highway drops into, and shortens the application life of highway, causes in national economy and sustain a loss, and causes the upper bad impact of society.Therefore, the problem that subgrade and pavement differential settlement causes is solved very urgent and necessary.
Summary of the invention
The invention provides method and the device thereof of the existing highway subgrade sedimentation of a kind of lifting, in the section of the uneven sedimentation of highway subgrade, road surface and the following certain distance of roadbed contact interface, by the position of designing requirement, quantity successively to level in roadbed insert multiple can the tabular lifting device (as Fig. 2) of one-dimensional expansion, by the order of each lifting device by designing requirement, spreading rate, expansion amplitude is vertically expanded step by step, the roadbed lifting of depression is made to return to roadbed design desired value, then the block materials with injected hole with sufficient intensity is adopted to replace each tabular lifting device successively, and inject appropriate known gel rubber material and make to be full of the hole that the gap of block materials and lifting process formed at soil, realize the object of the existing highway subgrade roadbed subsidence of lifting.
The device of the existing highway subgrade sedimentation of a kind of lifting of the present invention, main employing three kinds of lifting device modes, are respectively A1, A2, A3 tri-kinds:
The first: mechanical lifting device A1 is connected by some joint lifting device unit and utilizes known method to weld or bolted end first gear plate (10) forms, each joint lifting device unit is as (Fig. 3, a) with shown in (Fig. 3 b), is formed (3), gripper shoe (4), lifting frid (5) (2), support bar primarily of drive screw (1), nut.Wherein drive screw (1) is made up of counterscrew (6) and forward screw rod (7).The upper cover of counterscrew (6) has nut to the reverse nut (8) in (2); The upper cover of forward screw rod (7) has nut to the forward nut (9) in (2); A pair anti-, forward nut (8), (9) upper each hinged support bar are to (3), and the other end of support bar to (3) is hinged in gripper shoe (4), and gripper shoe (4) welding or bolt connect lifting frid (5).
During work, external force makes drive screw (1) rotate, reverse nut (8) and forward nut (9) is driven to rotate relative to counterscrew (6) and forward screw rod (7), and then the distance reduced between reverse nut (8) and forward nut (9), support bar is to the other end of (3) outwardly convex under reverse nut (8) and forward nut (9) drive respectively, and then promote lifting frid (5) expansion by gripper shoe (4), realize the lifting to subgrade and pavement, recover evenness of road surface.
Multiple mechanical lifting device A1 unit assembly and connection becomes to meet the lifting device of design length, and design length is determined according to road width or sunken region size; In lifting device A1, the connection of lifting frid (5) adopts merogenesis welding or shares the mode of continuous lifting frid (5).
The second: hydraulic lift device A2 is connected by some joint lifting device unit and utilizes known method welding or bolted end first gear plate (10) to form, each joint lifting device unit section figure (as Fig. 4 a), hydraulic lift device A2 is mainly divided into two kinds of forms, single hydraulic lift device (Fig. 4 b) and double hydraulic lift device (Fig. 4 c), described lifting device unit is (i) formed (c), gripper shoe (d), lifting frid (e), jack (f), support pier (g), chute (h), connection push pedal primarily of smooth strut (a), the collar (b), support bar; Its smooth strut (a) is made up of smooth shaft, and on it, cover has the collar (b); The collar (b) is fixed on support pier (g), and support pier (g) is placed in chute (h); Support bar is hinged on the collar (b) to (c) one end, and the other end of support bar to (c) is hinged in gripper shoe (d), connects lifting frid (e) outside gripper shoe (d); During single hydraulic lift device, jack (f) is fixed on bottom lifting frid (e) of support pier (g) centre of adjacent two non-same pin joints, and two ends are connected with two support piers (g) respectively.During double hydraulic lift device, jack (f) is placed in the middle of the connection push pedal (i) of two adjacent one group of non-same pin joint, and jack (f) self is fixed in bottom lifting frid (e), and two ends are (i) connected with junction plate.
When hydraulic lift device A2 is in contraction state, whole lifting device closed-cell is between two liftings frid (e), the two adjacent support piers (g) of non-articulated on the same collar (b) are end to end with jack (f), and support pier (g) is placed in chute (h), can along slide; When starting working, multiple jack oil-feed simultaneously work, support pier (g) is subject to the pushing motion of jack (f), the collar (b) on support pier (g) is along smooth strut (a) relative motion, drive hinged support bar thereon to (c) relative motion, the other end making support bar right expands outwardly simultaneously, promotes lifting frid (e) expansion by promoting gripper shoe (d), realize the lifting to subgrade and pavement, recover evenness of road surface.
Multiple hydraulic lift device A2 unit assembly and connection becomes to meet the lifting device of design length, and design length is determined according to road width or sunken region size; The connection of lifting frid (e) in hydraulic lift device A2 adopts merogenesis welding or shares the mode of continuous lifting frid (e).
The third: lifting device A3 is connected by some joint lifting device unit and utilizes known method to weld or bolted end first gear plate (10) forms, shown in each joint lifting device unit (as Fig. 5 a and Fig. 5 b), reserve water supply hole (q) primarily of in upper strata lifting frid (m), lower floor's lifting frid (n), groove (p), water supply hole (q) four part composition upper strata lifting frid (m), there has been aperture in the face that water supply hole (q) is inner relative with lower floor's lifting frid (n); Lower floor's lifting frid (n) reserves groove (p), deposits expanding material in groove (p), simultaneously and upper strata lifting frid (m) chimeric; The number of groove (p) and water supply hole (q) can be one, and (Fig. 5 a) or multiple (Fig. 5 b).
By press-in expanding material in groove (p), upper strata lifting frid (m) is fastened with lower floor's lifting frid (n), in overall implantation soil layer simultaneously; Supplied water by water supply hole (q) prefabricated in upper strata lifting frid (m), the expansion force produced after making water and expandable material contact promotes upper strata lifting frid (m) and slowly extrudes lifting soil layer, until be expanded to design rising height.
Multiple expansion lifting device A3 unit assembly and connection becomes to meet the lifting device of design length, design length is determined according to road width or sunken region size, connected mode can adopt the known method such as welding, bolt connection, also can adopt the mode being directly processed into the lifting device meeting design length.
Expanding material adopts the material of known calcined oxide calcium, calcined magnesia, calcium sulphoaluminate, gypsum, slag, and one or more are formulated, each component content according to needed for the swell increment that provides determine.
The method of the existing highway subgrade sedimentation of a kind of lifting of the present invention, concrete grammar is as follows:
The first step: at the section of existing highway subgrade sedimentation, selects suitable position that the lifting device level under contraction state is squeezed into appropriate depth (as Fig. 1).The known manner that used mode of squeezing into adopts first casting pore-forming to squeeze into again, casting mode adopts known spiral casting hole forming method etc.; The mode squeezing into lifting device adopts known method such as static pressure, hammering, impact etc. directly to squeeze into method, requires that the aperture beaten in advance in roadbed is slightly less than the size of various lifting device.
Second step: when adopting mechanical lifting device A1, rotary drive screw rod (1) drives reverse nut (8) and forward nut (9) move toward one another.Order about and be hinged on support bar on reverse nut (8) and forward nut (9) to (3) other end outwardly convex, promote gripper shoe (4) outwards to move, gripper shoe (4) heads on lifting frid (5) and opens, lifting frid (5) directly extrudes lifting soil layer, until be expanded to design rising height; When adopting hydraulic lift device A2, powered support pier (g) motion produced by jack (f), and then the collar (b) drives hinged support bar on it to move to (c), support bar is to (c) other end outwardly convex, promote gripper shoe (d) outwards to move, gripper shoe (d) heads on lifting frid (e) and opens, and lifting frid (e) directly extrudes lifting soil layer, until be expanded to design rising height; When adopting expansion lifting device A3, in the prefabricated groove (p) of lower floor's lifting frid (n), filling expanding material, being fastened by upper and lower layer lifting frid simultaneously, entirety is implanted in soil layer; Supplied water by water supply hole (q) prefabricated in upper strata lifting frid (m), the expansion force produced after making water and expandable material contact promotes upper strata lifting frid (m) and slowly extrudes lifting soil layer, until be expanded to design rising height.
3rd step: when lifting device A is lifted to maximum lifting heights, pavement depression value is recovered if be also not enough to, then from first lifting device, lifting device is shunk to reduce lifting device height in interval successively, then in the also lifting again of its underfill prefabricated section material, further raising rising height, in like manner successively at all the other lifting device underfill prefabricated section material.
4th step: after final recovery pavement depression, lifting device is taken out at interval successively, and fills with block material, then takes out next lifting utensil; After finally completing the replacement of all lifting devices, utilize and inject gel rubber material slurry in the gap in Kong Xiangxiang block material prefabricated in block material and complete construction.
Advantage of the present invention and effect are:
The method of the existing highway subgrade sedimentation of a kind of lifting that the present invention proposes and device thereof, achieve the soil body closely knit further in lifting roadbed process, reduce roadbed settlement recover after the possibility of depression again; Governance process is constructed from roadbed side, and construction period does not need blocked road, does not affect highway normal pass; For lifting equipment, initial volume is little, and bury easily, rising height is large, effective, and fast, efficiency is high in construction.
Accompanying drawing explanation
Fig. 1 the present invention administers the punching construction technology schematic diagram of roadbed settlement;
Lifting device schematic diagram under the closure state of Fig. 2 belt end baffle plate;
Fig. 3 a A1 mechanical lifting device unit section schematic diagram;
The A1 mechanical lifting device cell schematics of Fig. 3 b belt end baffle plate;
Fig. 4 a A2 single hydraulic lift device unit section schematic diagram;
Fig. 4 b A2 single hydraulic lift device cell schematics;
The double hydraulic lift device of Fig. 4 c A2 shows that unit is intended to;
Fig. 5 a mono-groove A3 expansion lifting device cell schematics;
Fig. 5 b double flute A3 expansion lifting device cell schematics.
In figure:
A1 mechanical lifting device A2 hydraulic lift device A3 expansion lifting device
1 drive screw 2 nut to 3 support bars to 4 gripper shoes
5 lifting frid 6 counterscrew 7 are to screw rod 8 oppositely nut
9 to nut 10 termination baffle plate
A smooth strut b collar c support bar is to d gripper shoe
E lifting frid f jack g support pier h chute
I connects push pedal m upper strata lifting frid n lower floor lifting frid
P groove q water supply hole r ground s roadbed
T1 shrinks lifting device position t2 and opens u road surface, rear lifting device position
Detailed description of the invention
Be described in detail below in conjunction with the concrete enforcement of drawings and Examples to a kind of method and device thereof of administering existing highway bridgehead vehicle jump provided by the invention.
Mechanical lifting device A1 provided by the invention is connected by some joint lifting device unit and utilizes known method welding or bolted end first gear plate (10) to form, (if Fig. 3 is a) with shown in (Fig. 3 b), described lifting device unit mainly comprises drive screw (1), nut to (2), support bar to (3), gripper shoe (4), lifting frid (5) to each joint lifting device unit.Described drive screw (1) is divided into counterscrew (6) and forward screw rod (7) two parts, described nut comprises reverse nut (8) and forward nut (9) to (2), and described reverse nut (8) and forward nut (9) are assemblied on counterscrew (6) and forward screw rod (7) respectively.Described reverse nut (8) is hinged with two support bars, described forward nut (7) is hinged with two support bars, homonymy hinged on positive and negative nut two support bar group in a pair support bar to (3), the other end of often pair of support bar to (3) is hinged on the same position in gripper shoe (4), and described gripper shoe (4) is directly welded with between lifting frid (5), bolt is fixedly connected with or hinged.Described lifting frid (5) is trench structure, and when lifting device unit is in contraction state, neighbouring lifting frid (5) closes, and prevents the soil body from entering machine internal.
In a contracted state, distance between described reverse nut (8) and forward nut (9) is relatively far away, when needs lifting, external force makes drive screw (1) rotate, reverse nut (8) and forward nut (9) is driven to rotate relative to counterscrew (6) and forward screw rod (7), and then the distance oppositely between nut (8) and forward nut (9) diminishes, reverse nut (8) and forward nut (9) drive support bar hinged on it to the other end outwardly convex of (3) respectively, and then promote lifting frid (5) expansion by gripper shoe (4), realize the lifting to subgrade and pavement, recover evenness of road surface.
Multiple mechanical lifting device A1 unit assembly and connection becomes to meet the lifting device of design length, and design length is determined according to road width or sunken region size; In lifting device A1, the connection of lifting frid (5) adopts merogenesis welding or shares the mode of continuous lifting frid (5).
Hydraulic lift device A2 provided by the invention is connected by some joint lifting device unit and utilizes known method welding or bolted end first gear plate (10) to form, each joint lifting device unit as (Fig. 4 a), shown in (Fig. 4 b) and (Fig. 4 c), described lifting device unit primarily of smooth strut (a), the collar (b), support bar to (c), gripper shoe (d), lifting frid (e), jack (f), support pier (g), chute (h), connect push pedal and (i) form.Described smooth strut (a) is made up of smooth Metallic rod, and on it, cover has the collar (b); The described collar (b) is embedded with rolling steel ball, and can slide along smooth strut (a), the collar (b) is welded on support pier (g); Described support pier (g) is placed in chute (h), and embedding rolling steel ball is arranged at described chute (h) bottom, can realize being free to slide of support pier (g); Described support bar is hinged on the collar (b) to (c) one end, and the other end is hinged in gripper shoe (d); Lifting frid (e) is connected outside described gripper shoe (d).
When adopting single hydraulic lift device (Fig. 4 b), being articulated with support bar on same gripper shoe (d) to (c), two collars (b) be connected to (c) with support bar and the support pier (g) that is connected with the collar (b) is one group, jack (f) is fixed on bottom lifting frid (e) of two support piers (g) centres of adjacent a group, and two ends are connected with two support piers (g) respectively.When adopting double hydraulic lift device (Fig. 4 c), what be in same row is articulated with two pairs of support bars in two gripper shoes (d) of same row to (c), and the collar (b) be connected to (c) with support bar and the support pier (g) be connected with the collar (b) form one group jointly; Adjacent supports pier (g) of same row is (i) connected by connecting push pedal; Jack (f) is placed in two in the middle of adjacent one group, and jack (f) self is fixed in bottom lifting frid (e), and two ends are (i) connected with junction plate.
When hydraulic lift device A2 is in contraction state, whole lifting device closed-cell is between two liftings frid (e), the two adjacent support piers (g) of non-articulated on the same collar (b) are end to end with jack (f), and support pier (g) is placed in chute (h); When starting working, multiple jack oil-feed simultaneously work, support pier (g) is subject to the pushing motion of jack (f), the collar (b) on support pier (g) is along smooth strut (a) relative motion, drive hinged support bar thereon to (c) relative motion, the other end making support bar right expands outwardly simultaneously, launches by promoting gripper shoe (d) lifting frid (e), realize the lifting to subgrade and pavement, recover evenness of road surface.
Multiple hydraulic lift device A2 unit assembly and connection becomes to meet the lifting device of design length, and design length is determined according to road width or sunken region size; The connection of lifting frid (e) in hydraulic lift device A2 adopts merogenesis welding or shares the mode of continuous lifting frid (e).
Expansion lifting device A3 provided by the invention is connected by some joint lifting device unit and utilizes known method welding or bolted end first gear plate (10) to form, as shown in figure 5 a and 5b, described lifting device unit is primarily of upper strata lifting frid (m), lower floor's lifting frid (n), groove (p), water supply hole (q) four part composition for each joint lifting device unit; Reserve water supply hole (q) in upper strata lifting frid (m), there has been aperture in the face that water supply hole (q) is inner relative with lower floor's lifting frid (n); Lower floor's lifting frid (n) reserves groove (p), deposits expanding material in groove (p), simultaneously and upper strata lifting frid (m) chimeric.The number of groove (p) and water supply hole (q) can be one or more.
By press-in expanding material in groove (p), upper strata lifting frid (m) is fastened with lower floor's lifting frid (n), in overall implantation soil layer simultaneously; Supplied water by water supply hole (q) prefabricated in upper strata lifting frid (m), the expansion force produced after making water and expandable material contact promotes upper strata lifting frid (m) and slowly extrudes lifting soil layer, until be expanded to design rising height.
In expansion lifting device A3, the connection of each unit lifting frid can adopt the known method such as welding, bolt connection, also can adopt the mode of the shared continuous lifting frid being communicated with multiple lifting device unit.
Expanding material adopts the material of known calcined oxide calcium, calcined magnesia, calcium sulphoaluminate, gypsum, slag, and one or more are formulated, each component content according to needed for the swell increment that provides determine.
The method of the existing highway subgrade sedimentation of a kind of lifting of the present invention, can adopt following concrete steps to realize:
(1) at the section of existing highway subgrade sedimentation, suitable position is selected to select any one or multiple combination level in three kinds of lifting devices A1, A2, A3 to squeeze into appropriate depth (as Fig. 1), lifting device is the clamping plate shape utensil (as Fig. 2) of termination band block device, is beaten respectively in depression roadbed at regular intervals by lifting device by known methods such as static pressure, hammering, impacts.Described punching is the one-sided or following certain distance in road surface, both sides and roadbed contact interface interface of road in the section that sedimentation occurs, and horizontal mode is beaten in road, and depth of drive is determined depending on depression width of subgrade.The width in described hole and interval should be determined according to the actual weight on carrying road surface.Hole knockout adopts known casting punch method and requires that the aperture beaten in advance in roadbed is slightly less than the size of various lifting device.
(2) lifting device A1 or A2 or A3 are according to the difference of roadbed settlement, select different combinations, adopt different arrangement modes, for land subsidence, adopt horizontal arranged adjacent, the spreading rate lifting roadbed of change of gradient; For local differential settlement, adopt horizontal arranged adjacent, but adopt peripheral expansion speed slow, the mode lifting that intermediate expansions speed is fast, recovers evenness of road surface; For the reparation of road surface local collapse, by the lifting device unit of certain suitable length and width, independent or to be somely connected or horizontally mode is implanted to the position that subsides, to control uplift rate, slow lifting depression roadbed, until road surface is recovered smooth or is slightly exceeded original pavement-height; Eminence is crossed in lifting, adopts the mode rolling recovery to recover evenness of road surface.The height of the lifting device lifting arranged at regular intervals is according to pavement depression setting.
(3) when lifting device A1 or A2 or A3 is lifted to maximum lifting heights, pavement depression value is recovered if be also not enough to, then from first lifting device, lifting device is shunk to reduce lifting device height in interval successively, then also again rising height is recovered, in like manner successively at all the other lifting device underfill prefabricated section material at its underfill prefabricated section material.Block material adopts mode prefabricated in advance, the block material utilizing well known materials to be prepared into, prefabricated hole in block material, and the shape of block material is selected according to Specific construction demand.
(4), after final recovery pavement depression, lifting device is taken out at interval successively, and fills with block material, then takes out next lifting utensil; After finally completing the replacement of all lifting devices, utilize and inject gel rubber material slurry in the gap in Kong Xiangxiang block material prefabricated in block material and complete construction.
specific embodiment 1:
Certain bumping at bridge-head harnessing project, know according to exploration report: road foundation soil layer is cohesive soil, road surface (u) total structure thickness 60cm, roadbed height 5m, road both sides are spacious, constructability, whole road structure degree of compaction is better, it is 31mm that end of the bridge place exists view picture roadbed subsidence maximum settlement, and depression degree is inversely proportional to apart from end of the bridge distance, the wide 30m in road surface
(1) mode adopting road both sides simultaneously to construct, at the section of road and bridge joint portion roadbed subsidence, below road structure bottom, the mechanical lifting device A1(of 50cm left and right horizontal implantation belt termination baffle plate (10) is as Fig. 3 a and Fig. 3 b).Adopt little drill bit screw machine casting punch method to punch in road in road level direction, road both sides, aperture is wide 15cm, high 10cm, design punching length is road half-breadth 15m, utilize the mode of static pressure, mechanical lifting device A1 is pressed among roadbed by the hole accomplished fluently
The long 15m of mechanical lifting device A1 assembled under contraction state, wide 20cm, height overall 12cm; Support bar (3) and the horizontal direction angle of lifting device A1 are 45 ° of length is 7cm, the thick 1cm of lifting frid, and each support bar is arranged interval 20cm; After lifting device is opened completely, height overall is 16cm, and support bar and horizontal direction angle are 90 °; The form that the connection of lifting frid (5) adopts element solder assembled; Lifting device by 50cm interval arrange 3 groups beat respectively depression road surface (u) bottom following 50cm position, the overall height of the final lifting of each lifting device, with distance road and bridge joint portion distance inversely, be followed successively by 34mm, 17mm, 8mm.Final lifting exceeds former road surface and is about about 3mm.
(2) for all lifting devices squeezing into roadbed, the torsional forces utilizing Shanghai company to produce provides machine to provide the torsional forces of lifting device, favourable turn speed is adjustable, each lifting device promotes and is undertaken by 8mm, 4mm, 2mm, lifting simultaneously, after lifting, keep rising height, repeat aforesaid way every other day and construct; Repeat above-mentioned steps, until pavement depression recovers, and finally exceed former road surface about 3mm.
(3) after road surface lifting recovers, first middle lifting device is extracted out, subsequently light block material with holes for tabular is inserted in the hole of lifting formation, slip casting machinery is utilized to inject rare cement paste to the pre-manufactured hole in light material block, mud is water/binder ratio 0.6, ensure tabular light block with holes material pore filling complete and between each block of material and and the soil body between formed and combine closely.Extract all the other each lifting device A1 out, after 1 day, the compacted machine utilizing Shandong enterprise to produce carries out road surface and rolls, and to reach equal with bridge floor, and utilizes side slope protection technology to carry out reparation roadbed simultaneously, completes the lifting work of whole depression roadbed.
specific embodiment 2:
Certain road repair project, know according to exploration report: engineering ground is soil layer is sandy soil, road structure gross thickness 40cm, roadbed height 4m, road is built along riverbed, and road both sides execution conditions are sufficient, and density of roadbed is not good enough, roadbed maximum settlement is 50mm, and roadbed subsidence form is the depression of half range road.The wide 20m in road surface
(1) adopt road depression section to carry out the mode of half range construction, at the section of roadbed subsidence, below road structure bottom, about 1m squeezes into single hydraulic lift device A2(as Fig. 4 a and Fig. 4 b) be welded with termination baffle plate (10).The spiral earth drill adopting company of Bazhou City to produce carries out casting method and punches in road at road both sides road level, and design punching length is road half-breadth 10m, and the wide 25cm of pass, high 15cm, pore-forming is slightly less than lifting device size.
The long 10m of hydraulic lift device A2 under contraction state, wide 30cm, height overall 20cm, the thick 1cm of lifting frid, requires the aperture slightly larger than beating in advance in roadbed; Support pier (g) is highly 10cm; Support bar (c) and the horizontal direction angle of lifting device A2 are 30, and length is 8cm, and each support bar is arranged interval 30cm; After lifting device is opened completely, final height 28cm, support bar (c) and horizontal direction angle are 90 °; The connection of lifting frid adopts the form of public continuous lifting frid (e); Utilize hammer mode, in the hole beaten in advance before being driven into, lifting device beats 1m position below depression roadbed respectively by 30cm interval layout group, the overall height of the final lifting of each lifting device, is as the criterion to recover depression evenness of road surface.
(2) for all lifting devices squeezing into roadbed, hydraulic jack (f) is utilized to provide power, after the speed lifting 15mm of 1mm/min, keep rising height, repeat aforesaid way every other day to construct, until pavement depression recovers, and exceed former road surface about 4mm.
(3) after road surface lifting recovers, first middle lifting device is extracted out, subsequently light block material with holes for tabular is inserted in the hole of lifting formation, the slip casting machinery utilizing Beijing company to produce injects rare cement paste to the pre-manufactured hole in light material block, mud is water/binder ratio 0.5, ensure tabular light block with holes material pore filling complete and between each block of material and and the soil body between formed and combine closely.Extract all the other each lifting device A2 out, after 2 days, utilize the compacted machine to carry out road surface and roll, to reach equal with bridge floor, and utilize side slope protection technology to carry out reparation roadbed simultaneously, complete the lifting work of whole depression roadbed.
specific embodiment 3:
Certain road synthetic harnessing project, knows according to exploration report: engineering ground is soil layer is grittiness clay, road structure gross thickness 50cm, roadbed height 4.5m, roadbed subsidence form is uneven part depression, and decanting zone is the irregular area of diameter 8m, road surface maximum settlement is 50mm, the wide 50m in road surface.
(1) in the mode of the one-sided construction of decanting zone road, adopt little drill bit screw machine casting punch method to punch in road in following 50cm place, bottom, road surface (u) horizontal direction, aperture is wide 35cm, high 15cm; Press-in expanding material in the groove (p) of expansion lifting device A3, upper strata lifting frid (m) is fastened with lower floor's lifting frid (n) simultaneously, adopt double flute expansion lifting device A3(herein as Fig. 5 b), at the section of roadbed subsidence, below road structure bottom about 50cm by expansion lifting device A3(as Fig. 5 b) head bolts mode is connected with termination baffle plate (10)
Expand under contraction state the long 8m of lifting device A3, wide 40cm, height overall 20cm, and upper and lower layer lifting frid (m), (n) thickness are 1cm, adopts the form of public continuous upper and lower layer lifting frid (m), (n); Groove (p) total depth degree 18cm, wide 17cm, wherein 9cm height fills expanding material; After expanding material complete expansion, expansion lifting device A3 finally highly reaches 29cm; .
(2) supplied water by water supply hole (q) in upper strata lifting frid (m) of expansion lifting device A3, water supply aperture is wide 13cm, high 3cm square hole, the expansion force produced after water and expandable material contact promotes upper strata lifting frid (m) and slowly extrudes lifting soil layer, until be expanded to design rising height.Giant is utilized to supply water to water supply hole (q), the output in each hole stops supplying water after reaching 30ml, due to action of mechanical pressure, the aperture be reserved in water supply hole (q) is inflated material and blocks, therefore inflating pressure mode is utilized, by water equally distributed in hole by the reserved hole at water supply hole (q) soffit press-in expanding material; Adopt way of supplying water every other day, repeat said process, make its lifting roadbed that expands, finally exceed former road surface about 4mm.
(3) after road surface lifting recovers, first utilize grooved bit to dig out the expanding material in expansion lifting device A3, bit diameter controls at 2cm, reduces the height of expansion lifting device A3, thus is extracted out by lifting device; Subsequently light block material with holes for tabular is inserted in the hole of lifting formation, hydraulic pressure slip casting machinery is utilized to inject rare cement paste to the pre-manufactured hole in light material block, mud is water/binder ratio 0.5, ensure tabular light block with holes material pore filling complete and between each block of material and and the soil body between formed and combine closely.After 2 days, utilize the compacted machine to carry out road surface and roll, to reach equal with bridge floor, and the side slope protection technology simultaneously utilized carries out reparation roadbed, completes the lifting work of whole depression roadbed.
In expansion lifting device A3, expanding material constituent mass percent used is: (calcining heat is 800-1000 DEG C of insulation 10 hours to commercial lime, calcium oxide content is greater than 90%) 20%, (calcining heat is 1000-1200 DEG C of insulation 8 hours to magnesia, content of magnesia is greater than 85%) 30%, calcium sulphoaluminate 30%, gypsum 10%, slag 10%;
specific embodiment 4:
Certain road synthetic harnessing project, knows according to exploration report: engineering ground is soil layer is grittiness clay, road structure gross thickness 50cm, roadbed height 6m, because various subgrade defect causes road surface to be differential settlement, local difference is large, maximum settlement is 80mm, the wide 50m in road surface, and road both sides are spacious.
(1) A2, A3 two kinds of lifting machineries are adopted to recover with the use of realizing pavement depression maximum settlement 80mm district (about 2m is wide, the long region of 5m).Adopt horizontal casting hole knockout, the spiral casting punching mechanical adopting Jiangsu company to produce punches at 70cm place immediately below sedimentation maximum road surface (u) bottom in road, aperture is wide 15cm, high 24cm, be pressed into a single groove expansion lifting device A3(Fig. 5 a) after pore-forming, be pressed into a liquids double-rows after respectively utilizing casting pore-forming with 30cm place, horizontal interval, single groove expansion lifting device A3 both sides, 90cm place and 150cm and press lifting device A2(Fig. 4 c).
Contraction state places an order groove expansion lifting device A3(Fig. 5 a) long 5m, wide 20cm, height overall 26cm, and upper and lower layer lifting frid (m), (n) thickness are 2cm, adopt share continuously up and down, layer lifting frid (m), (n) form; Groove (p) total depth degree 22cm, wide 14cm, wherein 11cm height fills expanding material; After expanding material complete expansion, what expansion lifting device A3 opened completely finally highly reaches 37cm.Double hydraulic lift device A2(Fig. 4 c under contraction state) long 6m, wide 20cm, height overall 26cm, support pier (g) is highly 12cm, the thick 2cm of lifting frid (e), and lifting frid (e) adopts the form of element solder; Support bar (c) and the initial angle of horizontal direction of lifting device A2 are 45 °, and length is, 10cm, and each support bar is arranged interval 50cm; After lifting device is opened completely, final height 36cm, support bar angle and horizontal direction are 90 °.
(2) for the unit squeezing into roadbed double hydraulic lift device A2(Fig. 4 c), utilize hydraulic jack (f) to provide power, after the speed lifting 15mm of 1mm/min, keep rising height, repeat aforesaid way every other day to construct, until pavement depression recovers, and exceed former road surface about 4mm; For single groove expansion lifting device A3(Fig. 5 a), supplied water by prefabricated hole in single groove expansion lifting device A3(Fig. 5 upper strata lifting frid (m) a), the expansion force produced after making water and expandable material contact promotes upper strata lifting frid (m) and slowly extrudes lifting soil layer, until be expanded to design rising height; In lifting process, ensure that each Uplifting amount is in middle high, both sides low tendency, is respectively middle lifting 15mm, twice each lifting 10mm, 5mm, 2mm, and above-mentioned steps was repeated after one day in interval, finally makes its lifting roadbed that expands, finally exceeds former road surface about 2mm.
(3) after road surface lifting recovers, first single groove expansion lifting device A3 of centre is extracted out, subsequently light block material with holes for tabular is inserted in the hole of lifting formation, hydraulic pressure slip casting machinery is utilized to inject rare cement paste to the pre-manufactured hole in light material block, mud is water/binder ratio 0.7, ensure tabular light block with holes material pore filling complete and between each block of material and and the soil body between formed and combine closely.Extract all the other each double hydraulic lift device A2 out, after 2 days, the compacted machine utilizing Xuzhou group to produce carries out road surface and rolls, to reach equal with bridge floor, and utilize the side slope protection technology of grass planting bank protection to carry out the reparation of roadbed side simultaneously, complete the control of whole roadbed.
In single groove expansion lifting device A3, expanding material constituent mass percent used is: (calcining heat is 800-1000 DEG C of insulation 10 hours to commercial lime, calcium oxide content is greater than 90%) 50%, (calcining heat is 1000-1200 DEG C of insulation 8 hours to magnesia, content of magnesia is greater than 85%) 20%, calcium sulphoaluminate 30%.
Claims (7)
1. a method for the existing highway subgrade roadbed subsidence of lifting, is characterized in that:
In the section of highway generation sedimentation, road surface and the following certain distance of roadbed contact interface, by the position of designing requirement, quantity successively to level in roadbed insert multiple can the tabular lifting device of vertical one-dimensional expansion, by the order of each lifting device by designing requirement, spreading rate, expansion amplitude is vertically expanded step by step, the roadbed lifting of depression is made to return to roadbed design desired value, then the block materials with injected hole with sufficient intensity is adopted to replace each tabular lifting device successively, and inject appropriate known gel rubber material slurry and make to be full of the hole that the gap of block materials and lifting process formed at soil, realize the object of the existing highway subgrade roadbed subsidence of lifting.
2. the method for the existing highway subgrade roadbed subsidence of lifting according to claim 1, it is characterized in that: described tabular lifting device is mechanical lifting device A1: mechanical lifting device A1 is connected by some joint lifting device unit and utilizes known method welding or bolted end first gear plate to form, each joint lifting device unit is formed (3), gripper shoe (4) and lifting frid (5) (2), support bar primarily of drive screw (1), nut; Wherein drive screw (1) is made up of counterscrew (6) and forward screw rod (7); The upper cover of counterscrew (6) has nut to the reverse nut (8) in (2); The upper cover of forward screw rod (7) has nut to the forward nut (9) in (2); Reverse nut (8) and forward nut (9) are articulated with support bar to (3), the other end of support bar to (3) is hinged in gripper shoe (4), connects lifting frid (5) outside gripper shoe (4);
When adopting mechanical lifting device A1, rotary drive screw rod (1) drives reverse nut (8) and forward nut (9) move toward one another; Order about and be hinged on support bar on reverse nut (8) and forward nut (9) to (3) other end outwardly convex, promote gripper shoe (4) outwards to move, gripper shoe (4) heads on lifting frid (5) and opens, lifting frid (5) directly extrudes lifting soil layer, until be expanded to design rising height.
3. the method for the existing highway subgrade roadbed subsidence of lifting according to claim 1, it is characterized in that: described tabular lifting device is hydraulic lift device A2: hydraulic lift device A2 is connected by some joint lifting device unit and utilizes known method welding or bolted end first gear plate to form, hydraulic lift device A2 is divided into two kinds of forms, single hydraulic lift device and double hydraulic lift device, described lifting device unit is primarily of smooth strut (a), the collar (b), support bar is to (c), gripper shoe (d), lifting frid (e), jack (w), support pier (g), chute (h) be connected push pedal (i) form, its smooth strut (a) is made up of smooth shaft, and on it, cover has the collar (b), the collar (b) is fixed on support pier (g), and support pier (g) is placed in chute (h), support bar is hinged on the collar (b) to (c) one end, and the other end of support bar to (c) is hinged in gripper shoe (d), connects lifting frid (e) outside gripper shoe (d), during single hydraulic lift device, jack (f) is fixed on bottom lifting frid (e) of support pier (g) centre of adjacent two non-same pin joints, and two ends are connected with two support piers (g) respectively, during double hydraulic lift device, jack (f) is placed in the middle of connection push pedal (i) of two adjacent one group of non-same pin joint, jack (f) self is fixed on bottom lifting frid (e), and two ends are with to be connected push pedal (i) connected,
When adopting hydraulic lift device A2, powered support pier (g) motion produced by jack (f), and then the collar (b) drives hinged support bar on it to move to (c), support bar is to (c) other end outwardly convex, promote gripper shoe (d) outwards to move, gripper shoe (d) heads on lifting frid (e) and opens, lifting frid (e) directly extrudes lifting soil layer, until be expanded to design rising height.
4. the method for the existing highway subgrade roadbed subsidence of lifting according to claim 1, it is characterized in that: described tabular lifting device is expansion lifting device A3: expansion lifting device A3 is connected by some joint lifting device unit and utilizes known method welding or bolted end first gear plate to form, each joint lifting device unit is primarily of upper strata lifting frid (m), lower floor's lifting frid (n), groove (p) and water supply hole (q) four part composition; Reserve water supply hole (q) in upper strata lifting frid (m), there has been aperture in the face that water supply hole (q) is inner relative with lower floor's lifting frid (n); Lower floor's lifting frid (n) reserves groove (p), deposits expanding material in groove (p), simultaneously and upper strata lifting frid (m) chimeric;
When adopting expansion lifting device A3, in the prefabricated groove (p) of lower floor's lifting frid (n), filling expanding material, being fastened by upper and lower layer lifting frid simultaneously, entirety is implanted in soil layer; Supplied water by water supply hole (q) prefabricated in upper strata lifting frid (m), the expansion force produced after making water and expandable material contact promotes upper strata lifting frid (m) and slowly extrudes lifting soil layer, until be expanded to design rising height.
5. the method for the existing highway subgrade roadbed subsidence of the lifting according to any one of claim 1-4, is characterized in that: lifting device is the clamping plate shape utensil of termination band block device.
6. the method for the existing highway subgrade roadbed subsidence of lifting according to claim 4, is characterized in that: described expanding material is one or more combinations of commercial lime, magnesia, calcium sulphoaluminate, gypsum, slag; Wherein the CaO content of commercial lime is greater than 90%, have passed through 10 hours high-temperature calcinations of 800-1000 DEG C; Magnesian content of MgO is greater than 85%, have passed through 8 hours high-temperature calcinations of 1000-1200 DEG C.
7. a method for the existing highway subgrade roadbed subsidence of lifting, is characterized in that: described method comprises the steps:
The first step: the lifting device that respectively will be in contraction state at road under one-sided or road surface, both sides successively implants soil layer projected depth by the position level of design;
Second step: make each lifting device vertical expanding extruding soil layer step by step successively, until keep reasonable time after being expanded to the expansion amplitude of design by the order of designing requirement, spreading rate, expansion amplitude;
3rd step: pack up lifting device successively by the order of design, and the block materials expanding the hole same size formed with lifting device is implanted in this hole, and inject known gel rubber material slurry by the injected hole in this block materials and make it to fill up the hole that lifting work progress causes at the soil body.
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| CN103553510B (en) * | 2013-10-23 | 2015-10-28 | 拉法基技术服务（北京）有限公司 | A kind of mortar material |
| CN104847128B (en) * | 2015-04-24 | 2017-03-01 | 深圳市苏勘岩土工程有限公司 | A kind of terrace lifts leveling section material restorative procedure |
| CN113107191B (en) * | 2021-03-29 | 2022-08-02 | 泉州市中原盛辉地产代理有限公司 | Construction method for mounting honeycomb core |
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| JPH10227003A (en) * | 1997-02-13 | 1998-08-25 | Katsumura Kensetsu Kk | Construction of base course |
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