CN103031792A - Method and device for lifting roadbed settlement of existing road - Google Patents
Method and device for lifting roadbed settlement of existing road Download PDFInfo
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- CN103031792A CN103031792A CN2013100029170A CN201310002917A CN103031792A CN 103031792 A CN103031792 A CN 103031792A CN 2013100029170 A CN2013100029170 A CN 2013100029170A CN 201310002917 A CN201310002917 A CN 201310002917A CN 103031792 A CN103031792 A CN 103031792A
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Abstract
The invention provides a method and a device for lifting roadbed settlement of the existing road. The method comprises the following steps: horizontally inserting a plurality of plate-shaped lifters capable of performing one-dimensional expansion into the roadbed sequentially according to the position and the quantity required by the design in the zone where the roadbed of the road is settled non-uniformly and in the certain distance below the contact interface between the road surface and the foundation, wherein the lifters are gradually expanded vertically according to the sequence, and the expansion rate and the expansion amplitude required by the design, so that the settled roadbed is lifted and recovered to the roadbed design target value; sequentially substituting block materials with sufficient strength and grouting holes for the plate-shaped lifters; and injecting a proper amount of known gel materials so as to fill the gap of the block materials, form holes in soil in the lifting process and fulfill the aim of lifting the roadbed settlement of the existing road.
Description
Technical field
The invention belongs to the 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 the highway is not all effectively solved for a long time.Settlement of subgrade will inevitably cause the out-of-flatness on road surface, and main manifestations is differential settlement of causing of seam step, end of the bridge or culvert two ends roadbed subsidence, local subgrade defect etc.
Many road-surface problem harm that settlement of subgrade causes is very large, and it has restricted, and highway is quick, comfortable, the performance of safe integral function, even causes the major traffic accidents of car crash.The maintenance that also increases simultaneously highway drops into, and shortens the application life of highway, causes on the national economy to sustain a loss, and has caused social bad impact.Therefore, solve the problem that the subgrade and pavement differential settlement causes 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 highway subgrade generation differential settlement, road surface and the following certain distance of roadbed contact interface, position by designing requirement, but quantity successively in the roadbed level insert the tabular lifting device (such as Fig. 2) of a plurality of one dimensions expansions, by the order of each lifting device by designing requirement, spreading rate, the expansion amplitude is vertically expansion step by step, make the roadbed lifting of depression return to the roadbed design desired value, then adopt the block materials with injected hole with sufficient intensity to replace successively each tabular lifting device, and inject the hole that an amount of known gel rubber material makes the gap that is full of block materials and lifting process form at soil, realize the purpose 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 mainly adopts three kinds of lifting device modes, is respectively A1, A2, and three kinds of A3:
The first: connected by some joint lifting devices unit and utilize known method welding or bolt connection end plate washer (10) to form for mechanical lifting device A1, each saves lifting device unit as (Fig. 3 mainly is made of (3), gripper shoe (4), lifting frid (5) (2), support bar drive screw (1), nut a) with shown in (Fig. 3 b).Wherein drive screw (1) is comprised 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 of anti-, forward nut (8), (9) upper each hinged support bar are to (3), and support bar is hinged on the gripper shoe (4) the other end of (3), and gripper shoe (4) welding or bolt connect lifting frid (5).
During work, extraneous power is so that drive screw (1) rotation, drive reverse nut (8) and forward nut (9) with respect to counterscrew (6) and forward screw rod (7) rotation, and then reduce distance between reverse nut (8) and the forward nut (9), support bar is outwards protruding under oppositely nut (8) and forward nut (9) drive respectively to the other end of (3), and then by gripper shoe (4) promotion lifting frid (5) expansion, realize the lifting to subgrade and pavement, recover evenness of road surface.
A plurality of 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 depression area size; The mode of merogenesis welding or shared continuous lifting frid (5) is adopted in the connection of lifting frid (5) among the lifting device A1.
The second: hydraulic lift device A2 is connected by some joint lifting devices unit and utilizes known method welding or bolt connection end plate washer (10) to form, each saves lifting device unit section figure (such as Fig. 4 a), hydraulic lift device A2 mainly is 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 mainly are made of (c), gripper shoe (d), lifting frid (e), jack (f), support pier (g), chute (h), connection push pedal (i) smooth strut (a), the collar (b), support bar; Its smooth strut (a) is comprised of smooth shaft, and cover has the collar (b) on it; The collar (b) is fixed on the support pier (g), and support pier (g) places chute (h); Support bar is hinged on the collar (b) (c) end, and support bar is hinged on the gripper shoe (d) the other end of (c), the outer lifting frid (e) that connects of gripper shoe (d); During single hydraulic lift device, jack (f) is fixed on the middle bottom lifting frid (e) of adjacent two non-support piers with pin joint (g), and two ends link to each other with two support piers (g) respectively.During double hydraulic lift device, jack (f) places in the middle of two adjacent one group of non-connection push pedal (i) with pin joint, and jack (f) self is fixed on the bottom lifting frid (e), and two ends link to each other with junction plate (i).
When hydraulic lift device A2 is in contraction state, whole lifting device closed-cell is between two lifting frids (e), the non-two adjacent support piers (g) that are hinged on the same collar (b) are end to end with jack (f), and support pier (g) is placed in the chute (h), can slide along chute; When starting working, simultaneously oil-feed of a plurality of jack work, support pier (g) is subject to the thrust motion of jack (f), the collar (b) on the support pier (g) is along smooth strut (a) relative motion, drive simultaneously hinged support bar thereon to (c) relative motion, the right other end expands outwardly to make support bar, promotes lifting frid (e) expansion by promoting gripper shoe (d), realization recovers evenness of road surface to the lifting of subgrade and pavement.
A plurality of 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 depression area size; The mode of merogenesis welding or shared continuous lifting frid (e) is adopted in the connection of lifting frid (e) among the hydraulic lift device A2.
The third: connected by some joint lifting devices unit and utilize known method welding or bolt connection end plate washer (10) to form for lifting device A3, each saves shown in the lifting device unit (such as Fig. 5 a and Fig. 5 b), mainly formed by upper strata lifting frid (m), lower floor's lifting frid (n), groove (p), water supply hole (q) four parts and reserved water supply hole (q) in the upper strata lifting frid (m), on the inner face relative with lower floor lifting frid (n) of water supply hole (q) aperture is arranged; Lower floor's lifting frid (n) is reserved groove (p), deposits expanding material in the groove (p), and while and upper strata lifting frid (m) are chimeric; The number of groove (p) and water supply hole (q) can (Fig. 5 a) or a plurality of (Fig. 5 b) for one.
To be pressed into expanding material in the groove (p), simultaneously upper strata lifting frid (m) and lower floor's lifting frid (n) are fastened, the whole implantation in the soil layer; Supply water by water supply hole (q) prefabricated in the upper strata lifting frid (m), make water contact the rear expansion force promotion upper strata lifting frid (m) that produces with expanding material and slowly push the lifting soil layer, until be expanded to the design rising height.
A plurality of 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 depression area size, connected mode can adopt the known methods such as welding, bolt connection, also can adopt the mode that directly is processed into the lifting device that satisfies design length.
Expanding material adopts the material of known calcined oxide calcium, calcined magnesia, calcium sulphoaluminate, gypsum, slag, and one or more are formulated, and each component content is determined according to the required swell increment that provides.
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, select suitable position that the lifting device level under the contraction state is squeezed into appropriate depth (such as Fig. 1).The known manner that the used mode of squeezing into adopts first casting pore-forming to squeeze into again, casting mode adopt known spiral casting hole forming method etc.; The mode of squeezing into the lifting device adopts known method such as static pressure, hammering, impact etc. directly to squeeze into method, and the aperture that requires to beat in advance in roadbed is slightly less than the size of various lifting devices.
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 the support bar that is hinged on reverse nut (8) and the forward nut (9) outwards protruding to (3) other end, promote outwards motion of gripper shoe (4), gripper shoe (4) heads on lifting frid (5) and opens, lifting frid (5) directly pushes the lifting soil layer, until be expanded to the design rising height; When adopting hydraulic lift device A2, the powered support pier (g) that produces by jack (f) moves, and then the collar (b) drives hinged support bar on it (c) is moved, support bar is outwards protruding to (c) other end, promote outwards motion of gripper shoe (d), gripper shoe (d) heads on lifting frid (e) and opens, and lifting frid (e) directly pushes the lifting soil layer, until be expanded to the design rising height; When adopting expansion lifting device A3, in the prefabricated groove (p) of lower floor's lifting frid (n), fill expanding material, simultaneously upper and lower layer lifting frid is fastened whole the implantation in the soil layer; Supply water by water supply hole (q) prefabricated in the upper strata lifting frid (m), make water contact the rear expansion force promotion upper strata lifting frid (m) that produces with expanding material and slowly push the lifting soil layer, until be expanded to the design rising height.
The 3rd step: when lifting device A is lifted to maximum rise height, if also be not enough to recover the pavement depression value, then begin successively the interval from first lifting device and shrink the lifting device to reduce lifting device height, then fill prefabricated section material and again lifting in its bottom, further improve rising height, in like manner fill the prefabricated section material in all the other lifting device bottoms successively.
The 4th step: finally recover after the pavement depression, the lifting device is taken out at the interval successively, and fills with the piece material, takes out next lifting utensil again; After finally finishing the replacement of all lifting devices, utilize in the gap in the Kong Xiangxiang piece material prefabricated in the piece material and to inject the gel rubber material slurry and finish construction.
Advantage of the present invention and effect are:
Method and the device thereof of the existing highway subgrade sedimentation of a kind of lifting that the present invention proposes, in lifting roadbed process, realized the soil body further closely knit, the possibility of depression again after having reduced roadbed settlement and recovering; Governance process is to construct from the roadbed side, and construction period does not need blocked road, does not affect highway normally current; For lifting equipment, initial volume is little, buries easily, and rising height is large, and is effective, and construction is quick, and efficient is high.
Description of drawings
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;
The single hydraulic lift device of Fig. 4 a A2 unit section schematic diagram;
The single hydraulic lift device of Fig. 4 b A2 cell schematics;
The double hydraulic lift device of Fig. 4 c A2 shows the unit intention;
The single groove A3 of Fig. 5 a expansion lifting device cell schematics;
Fig. 5 b double flute A3 expansion lifting device cell schematics.
Among the figure:
A1 mechanical lifting device A2 hydraulic lift device A3 expansion lifting device
1 drive screw, 2 nuts to 3 support bars to 4 gripper shoes
5 lifting frids, 6 counterscrew 7 are to screw rod 8 reverse nuts
9 to nut 10 termination baffle plates
The smooth strut b of a collar c support bar is to the 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
The specific embodiment
A kind of administer the method for existing highway bridgehead vehicle jump and the implementation of device is elaborated below in conjunction with drawings and Examples to provided by the invention.
Mechanical lifting device A1 provided by the invention is connected by some joint lifting devices unit and utilizes known method welding or bolt connection end plate washer (10) to form, each save lifting device unit (as Fig. 3 a) and (Fig. 3 b) shown in, described lifting device unit mainly comprise drive screw (1), nut to (2), support bar to (3), gripper shoe (4), lifting frid (5).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 in respectively on counterscrew (6) and the forward screw rod (7).Be hinged with two support bars at described reverse nut (8), be hinged with two support bars at described forward nut (7), two support bars of homonymy hinged on the positive and negative nut form pair of support rods to (3), the every pair of support bar is hinged on same position on the gripper shoe (4) to the other end of (3), and directly welding between described gripper shoe (4) and the lifting frid (5), bolt is fixedly connected with or hinged.Described lifting frid (5) is trench structure, and when lifting device unit was in contraction state, neighbouring lifting frid (5) closure prevented that the soil body from entering machinery inner.
Under contraction state, distance between described reverse nut (8) and the forward nut (9) is relatively far away, when the needs lifting, extraneous power is so that drive screw (1) rotation, drive reverse nut (8) and forward nut (9) with respect to counterscrew (6) and forward screw rod (7) rotation, and then the distance between reverse nut (8) and the forward nut (9) diminishes, it is outwards protruding to the other end of (3) that reverse nut (8) and forward nut (9) drive respectively support bar hinged on it, and then by gripper shoe (4) promotion lifting frid (5) expansion, realization recovers evenness of road surface to the lifting of subgrade and pavement.
A plurality of 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 depression area size; The mode of merogenesis welding or shared continuous lifting frid (5) is adopted in the connection of lifting frid (5) among the lifting device A1.
Hydraulic lift device A2 provided by the invention is connected by some joint lifting devices unit and utilizes known method welding or bolt connection end plate washer (10) to form, each save lifting device unit as (Fig. 4 a), shown in (Fig. 4 b) and (Fig. 4 c), described lifting device unit mainly by 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 (i) and consist of.Described smooth strut (a) is comprised of smooth Metallic rod, and cover has the collar (b) on it; The described collar (b) is embedded with rolling steel ball, can slide along smooth strut (a), and the collar (b) is welded on the support pier (g); Described support pier (g) places chute (h), and bottom the described chute (h) the embedding rolling steel ball is arranged, and can realize being free to slide of support pier (g); Described support bar is hinged on the collar (b) (c) end, and the other end is hinged on the gripper shoe (d); The outer lifting frid (e) that connects of described gripper shoe (d).
When adopting single hydraulic lift device (Fig. 4 b), being articulated in two collars (b) that the support bar on the same gripper shoe (d) links to each other to (c) to (c), with support bar and the support pier (g) that links to each other with the collar (b) is one group, jack (f) is fixed on the middle bottom lifting frid (e) of adjacent one group two support piers (g), and two ends link to each other with two support piers (g) respectively.When adopting double hydraulic lift device (Fig. 4 c), be in two pairs of support bars on same row's two gripper shoes (d) that are articulated in same row to (c), the collar (b) that (c) is linked to each other with support bar and the support pier (g) that links to each other with the collar (b) form one group jointly; Same row's adjacent supports pier (g) links to each other by connecting push pedal (i); Jack (f) places two in the middle of adjacent one group, and jack (f) self is fixed on the bottom lifting frid (e), and two ends link to each other with junction plate (i).
When hydraulic lift device A2 is in contraction state, whole lifting device closed-cell is between two lifting frids (e), the non-two adjacent support piers (g) that are hinged on the same collar (b) are end to end with jack (f), and support pier (g) is placed in the chute (h); When starting working, simultaneously oil-feed of a plurality of jack work, support pier (g) is subject to the thrust motion of jack (f), the collar (b) on the support pier (g) is along smooth strut (a) relative motion, drive simultaneously hinged support bar thereon to (c) relative motion, the right other end expands outwardly to make support bar, launches by promoting gripper shoe (d) lifting frid (e), realization recovers evenness of road surface to the lifting of subgrade and pavement.
A plurality of 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 depression area size; The mode of merogenesis welding or shared continuous lifting frid (e) is adopted in the connection of lifting frid (e) among the hydraulic lift device A2.
Expansion lifting device A3 provided by the invention is connected by some joint lifting devices unit and utilizes known method welding or bolt connection end plate washer (10) to form, each saves lifting device unit shown in Fig. 5 a and Fig. 5 b, and described lifting device unit mainly is comprised of upper strata lifting frid (m), lower floor's lifting frid (n), groove (p), water supply hole (q) four parts; Reserved water supply hole (q) in the upper strata lifting frid (m), on the inner face relative with lower floor lifting frid (n) of water supply hole (q) aperture has been arranged; Lower floor's lifting frid (n) is reserved groove (p), deposits expanding material in the groove (p), and while and upper strata lifting frid (m) are chimeric.The number of groove (p) and water supply hole (q) can be for one or more.
To be pressed into expanding material in the groove (p), simultaneously upper strata lifting frid (m) and lower floor's lifting frid (n) are fastened, the whole implantation in the soil layer; Supply water by water supply hole (q) prefabricated in the upper strata lifting frid (m), make water contact the rear expansion force promotion upper strata lifting frid (m) that produces with expanding material and slowly push the lifting soil layer, until be expanded to the design rising height.
The connection of each unit lifting frid can be adopted the known methods such as welding, bolt connection among the expansion lifting device A3, also can adopt the mode of the shared continuous lifting frid that is communicated with a plurality of lifting devices unit.
Expanding material adopts the material of known calcined oxide calcium, calcined magnesia, calcium sulphoaluminate, gypsum, slag, and one or more are formulated, and each component content is determined according to the required swell increment that provides.
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, select suitable position to select any one or multiple combination level among three kinds of lifting device A1, A2, the A3 to squeeze into appropriate depth (such as Fig. 1), the lifting device is the clamping plate shape utensil (such as Fig. 2) of termination band block device, and the lifting device is beaten respectively in the depression roadbed by known methods such as static pressure, hammering, impacts at regular intervals.One-sided or the following certain distance in road surface, both sides and roadbed contact interface interface of described punching road in the section of sedimentation occurs, horizontal mode is beaten in road, and it is definite that depth of drive is looked the depression width of subgrade.The width in described hole and interval should be determined according to the actual weight on carrying road surface.The aperture that hole knockout adopts known casting punch method and requirement to beat in advance in roadbed is slightly less than the size of various lifting devices.
(2) lifting device A1 or A2 or A3 select different combinations according to the difference of roadbed settlement, adopt different arrangement modes, for land subsidence, the adjacent arrangement of employing level, the spreading rate lifting roadbed of change of gradient; For local differential settlement, the adjacent arrangement of employing level, but adopt peripheral expansion speed slow, the mode lifting that middle spreading rate is fast recovers evenness of road surface; Reparation for the road surface local collapse, with the lifting device unit of certain suitable length and width, independent or some continuous or horizontal modes are implanted to the position that subsides, the control uplift rate, slow lifting depression roadbed is until the road surface is recovered smooth or slightly exceeded original pavement-height; Eminence is crossed in lifting, adopts the mode that rolls recovery to recover evenness of road surface.The height of the lifting device lifting of arranging is at regular intervals set according to pavement depression.
(3) be lifted to maximum when rising height as lifting device A1 or A2 or A3, if also be not enough to recover the pavement depression value, then begin successively the interval from first lifting device and shrink the lifting device to reduce lifting device height, then fill the prefabricated section material and again recover rising height in its bottom, in like manner fill the prefabricated section material in all the other lifting device bottoms successively.The piece material adopts and shifts to an earlier date prefabricated mode, the piece material that utilizes well known materials to be prepared into, and prefabricated hole in the piece material, the shape of piece material is selected according to the Specific construction demand.
(4) finally recover after the pavement depression, the lifting device is taken out at the interval successively, and fills with the piece material, takes out next lifting utensil again; After finally finishing the replacement of all lifting devices, utilize in the gap in the Kong Xiangxiang piece material prefabricated in the piece material and to inject the gel rubber material slurry and finish construction.
Specific embodiment 1:
Certain bumping at bridge-head is administered engineering, know according to exploration report: the road foundation soil layer is cohesive soil, road surface (u) structure gross thickness 60cm, roadbed height 5m, the road both sides are spacious, constructability, whole road structure degree of compaction is better, it is 31mm that there is view picture roadbed subsidence maximum settlement in the end of the bridge place, the depression degree be inversely proportional to the wide 30m in road surface apart from end of the bridge distance
(1) mode that adopts the road both sides to construct simultaneously is at the section of road and bridge joint portion roadbed subsidence, apart from mechanical lifting device A1(such as Fig. 3 a and Fig. 3 b of the following 50cm left and right horizontal of road structure bottom implantation belt termination baffle plate (10)).Adopt bradawl head screw machine casting punch method to punch in road in road both sides road level direction, the 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 the roadbed by the hole of accomplishing fluently
The long 15m of mechanical lifting device A1 that assembles under the contraction state, wide 20cm, height overall 12cm; The support bar (3) of lifting device A1 is that 45 ° of length are 7cm with the horizontal direction angle, the thick 1cm of lifting frid, and each support bar is arranged interval 20cm; After the lifting device was opened fully, height overall was 16cm, and support bar and horizontal direction angle are 90 °; The form of element solder assembly unit is adopted in the connection of lifting frid (5); The lifting device arranges that by the 50cm interval 3 groups are beaten respectively in following 50cm position, depression road surface (u) bottom, the overall height of the final lifting of each lifting device, and the distance relation of being inversely proportional to distance road and bridge joint portion is followed successively by 34mm, 17mm, 8mm.Final lifting exceeds former road surface approximately about 3mm.
(2) for all lifting devices of squeezing into roadbed, the torsional forces that utilizes Shanghai company to produce provides machine that the torsional forces of lifting device is provided, favourable turn speed is adjustable, each lifting device promotes and is undertaken by 8mm, 4mm, 2mm, simultaneously lifting, after the lifting, keep rising height, repeat every other day aforesaid way and construct; Repeat above-mentioned steps, until the pavement depression recovery, and finally exceed about former road surface 3mm.
(3) after the road surface lifting recovers, at first middle lifting device is extracted out, subsequently tabular light block material with holes is inserted in the hole of lifting formation, utilize slip casting machinery to inject rare cement paste to the pre-manufactured hole in the light material piece, mud is water/binder ratio 0.6, guarantee between complete and each the piece material of tabular light block material pore filling with holes and and the soil body between form and combine closely.Extract all the other each lifting device A1 out, after 1 day, the compacted machine that utilizes Shandong enterprise to produce carries out the road surface and rolls, and reaching equal with bridge floor, and utilizes simultaneously the side slope protection technology to repair roadbed, finishes the lifting work of whole depression roadbed.
Specific embodiment 2:
Certain road repair project, know according to exploration report: engineering ground is that soil layer is sandy soil, road structure gross thickness 40cm, roadbed height 4m, road along the river bed is built, and road both sides execution conditions are sufficient, and density of roadbed is not good enough, the roadbed maximum settlement is 50mm, and the roadbed subsidence form is the depression of half range road.The wide 20m in road surface
(1) mode that adopts road depression highway section to carry out the half range construction at the section of roadbed subsidence, is squeezed into single hydraulic lift device A2(such as Fig. 4 a and Fig. 4 b apart from about the following 1m of road structure bottom) be welded with termination baffle plate (10).The spiral earth drill that adopts Bazhou City company to produce carry out the casting method at road both sides road level in road, punching, design punching length is road half-breadth 10m, the wide 25cm of pass, high 15cm, pore-forming are slightly less than lifting device size.
The long 10m of hydraulic lift device A2 under the contraction state, wide 30cm, height overall 20cm, the thick 1cm of lifting frid requires to be slightly larger than the aperture of beating in advance in the roadbed; Support pier (g) highly is 10cm; The support bar (c) of lifting device A2 is 30 with the horizontal direction angle, and length is 8cm, and each support bar is arranged interval 30cm; After the lifting device is opened fully, final height 28cm, support bar (c) is 90 ° with the horizontal direction angle; The form of public continuous lifting frid (e) is adopted in the connection of lifting frid; Utilize the hammering mode, be driven in the hole of beating in advance the front, the lifting device is beaten respectively in the following 1m of depression roadbed position by 30cm interval layout group, and the overall height of the final lifting of each lifting device is as the criterion to recover the depression evenness of road surface.
(2) for all lifting devices of squeezing into roadbed, utilize hydraulic jack (f) that power is provided, behind the speed lifting 15mm with 1mm/min, keep rising height, repeat every other day aforesaid way and construct, until the pavement depression recovery, and exceed about former road surface 4mm.
(3) after the road surface lifting recovers, at first middle lifting device is extracted out, subsequently tabular light block material with holes is inserted in the hole of lifting formation, the slip casting machinery that utilizes Beijing company to produce injects rare cement paste to the pre-manufactured hole in the light material piece, mud is water/binder ratio 0.5, guarantee between complete and each the piece material of tabular light block material pore filling with holes and and the soil body between form and combine closely.Extract all the other each lifting device A2 out, after 2 days, utilize the compacted machine to carry out the road surface and roll, reaching equal with bridge floor, and utilize simultaneously the side slope protection technology to repair roadbed, finish the lifting work of whole depression roadbed.
Specific embodiment 3:
Certain road synthetic is administered engineering, and know according to exploration report: engineering ground is that soil layer is the grittiness clay, road structure gross thickness 50cm, roadbed height 4.5m, the roadbed subsidence form is inhomogeneous part depression, the decanting zone is the irregular area of diameter 8m, the 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 bradawl head screw machine casting punch method to punch in road in following 50cm place, road surface (u) bottom horizontal direction, the aperture is wide 35cm, high 15cm; In the groove (p) of expansion lifting device A3, be pressed into expanding material, simultaneously upper strata lifting frid (m) and lower floor's lifting frid (n) are fastened, adopt double flute expansion lifting device A3(such as Fig. 5 b herein), section at roadbed subsidence, apart from about the following 50cm of road structure bottom with expansion lifting device A3(such as Fig. 5 b) termination bolt mode is connected with termination baffle plate (10)
The long 8m of expansion lifting device A3 under the contraction state, wide 40cm, height overall 20cm, upper and lower layer lifting frid (m), (n) thickness are 1cm, adopt the form of public continuous upper and lower layer lifting frid (m), (n); Groove (p) total depth degree 18cm, wide 17cm, the wherein high expanding material of filling of 9cm; After the expanding material complete expansion, expansion lifting device A3 finally highly reaches 29cm;
(2) supply water by water supply hole (q) in the upper strata lifting frid (m) of expansion lifting device A3, the water supply aperture is wide 13cm, high 3cm square hole, the expansion force that produces after water contacts with expanding material promotes upper strata lifting frid (m) and slowly pushes the lifting soil layer, until be expanded to the design rising height.Utilize giant to supply water to water supply hole (q), the output in each hole stops to supply water after reaching 30ml, because action of mechanical pressure, being reserved in aperture in the water supply hole (q) is inflated material and blocks, therefore utilize the inflating pressure mode, equally distributed water in the hole is pressed in the expanding material by the hole at water supply hole (q) soffit of reserving; Adopt every other day way of supplying water, repeat said process, make its expansion lifting roadbed, finally exceed about former road surface 4mm.
(3) after the road surface lifting recovers, at first utilize grooved bit to dig out the expanding material among the expansion lifting device A3, bit diameter is controlled at 2cm, reduces the height of expansion lifting device A3, thereby the lifting device is extracted out; Subsequently tabular light block material with holes is inserted in the hole of lifting formation, utilize hydraulic pressure slip casting machinery to inject rare cement paste to the pre-manufactured hole in the light material piece, mud is water/binder ratio 0.5, guarantee between complete and each the piece material of tabular light block material pore filling with holes and and the soil body between form and combine closely.After 2 days, utilize the compacted machine to carry out the road surface and roll, reaching equal with bridge floor, and the side slope protection technology of utilizing simultaneously repairs roadbed, finishes the lifting work of whole depression roadbed.
Used expanding material constituent mass percent is among the expansion lifting device A3: (calcining heat is 800-1000 ℃ of insulation 10 hours to commercial lime, calcium oxide content is greater than 90%) 20%, (calcining heat is 1000-1200 ℃ 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 is administered engineering, and know according to exploration report: engineering ground is that soil layer is the grittiness clay, road structure gross thickness 50cm, roadbed height 6m, because various subgrade defects cause the road surface to be differential settlement, local difference is large, maximum settlement is 80mm, the wide 50m in road surface, and the road both sides are spacious.
(1) (approximately 2m is wide, the long zone of 5m) adopted A2, two kinds of lifting machineries of A3 to be used in conjunction with and realized that pavement depression recovers in maximum settlement 80mm district.Adopt horizontal casting hole knockout, the spiral casting punching mechanical that adopts Jiangsu company to produce punches in road at the 70cm place under bottom, sedimentation maximum road surface (u), the aperture is wide 15cm, high 24cm, be pressed into a single groove expansion lifting device A3(Fig. 5 behind the pore-forming a), respectively utilize with 30cm place, horizontal interval, single groove expansion lifting device A3 both sides, 90cm place and 150cm to be pressed into a liquids double-rows behind the casting pore-forming and to press lifting device A2(Fig. 4 c).
Contraction state a) the long 5m of groove expansion lifting device A3(Fig. 5 that places an order, wide 20cm, height overall 26cm, upper and lower layer lifting frid (m), (n) thickness are 2cm, adopt about sharing continuously, the form of layer lifting frid (m), (n); Groove (p) total depth degree 22cm, wide 14cm, the wherein high expanding material of filling of 11cm; After the expanding material complete expansion, expansion lifting device A3 opens fully finally highly reaches 37cm.Double hydraulic lift device A2(Fig. 4 c under the contraction state) long 6m, wide 20cm, height overall 26cm, support pier (g) they highly are 12cm, the thick 2cm of lifting frid (e), lifting frid (e) adopts the form of element solder; The support bar (c) of lifting device A2 and the initial angle of horizontal direction are 45 °, and length is, 10cm, and each support bar is arranged interval 50cm; After the lifting device is opened fully, final height 36cm, support bar angle and horizontal direction are 90 °.
(2) for the unit of squeezing into roadbed double hydraulic lift device A2(Fig. 4 c), utilize hydraulic jack (f) that power is provided, behind the speed lifting 15mm with 1mm/min, keep rising height, repeat every other day aforesaid way and construct, until the pavement depression recovery, and exceed about former road surface 4mm; For single groove expansion lifting device A3(Fig. 5 a), supply water by prefabricated hole in single groove expansion lifting device A3(Fig. 5 upper strata lifting frid (m) a), the expansion force that produces after water is contacted with expanding material promotes upper strata lifting frid (m) and slowly pushes the lifting soil layer, until be expanded to the design rising height; In the lifting process, guarantee that each lifting amount is high in the middle of being, the both sides low tendency, lifting 15mm in the middle of being respectively, twice each lifting 10mm, 5mm, 2mm, above-mentioned steps was repeated after one day in the interval, finally made its expansion lifting roadbed, finally exceeded about former road surface 2mm.
(3) after the road surface lifting recovers, at first the single groove expansion lifting device A3 with the centre extracts out, subsequently tabular light block material with holes is inserted in the hole of lifting formation, utilize hydraulic pressure slip casting machinery to inject rare cement paste to the pre-manufactured hole in the light material piece, mud is water/binder ratio 0.7, guarantee between complete and each the piece material of tabular light block material pore filling with holes and and the soil body between form and combine closely.Extract all the other each double hydraulic lift device A2 out, after 2 days, the compacted machine that utilizes Xuzhou group to produce carries out the road surface and rolls, to reach equal with bridge floor, and the side slope protection technology of utilizing simultaneously the grass planting bank protection carries out the roadbed side and repairs, and finishes the control of whole roadbed.
Used expanding material constituent mass percent is among single groove expansion lifting device A3: (calcining heat is 800-1000 ℃ of insulation 10 hours to commercial lime, calcium oxide content is greater than 90%) 50%, (calcining heat is 1000-1200 ℃ of insulation 8 hours to magnesia, content of magnesia is greater than 85%) 20%, calcium sulphoaluminate 30%.
Claims (6)
1. the invention provides method and the device thereof of the existing highway subgrade roadbed subsidence of a kind of lifting, it is characterized in that:
In the section of highway generation sedimentation, road surface and the following certain distance of roadbed contact interface, position by designing requirement, quantity successively in the roadbed level insert the tabular lifting device that a plurality of vertically one dimensions are expanded, by the order of each lifting device by designing requirement, spreading rate, the expansion amplitude is vertically expansion step by step, make the roadbed lifting of depression return to the roadbed design desired value, then adopt the block materials with injected hole with sufficient intensity to replace successively each tabular lifting device, and inject the hole that an amount of known gel rubber material slurry makes the gap that is full of block materials and lifting process form at soil, realize the purpose of the existing highway subgrade roadbed subsidence of lifting.
2. but the tabular lifting device of the vertical expansion of a kind of one dimension according to claim 1 mainly adopts three kinds of lifting device modes, is respectively A1, A2, and three kinds of A3 is characterized in that:
The first mechanical lifting device A1: mechanical lifting device A1 is connected by some joint lifting devices unit and utilizes known method welding or bolt connection end plate washer to form, and each saves lifting device unit and mainly drive screw (1), nut (2), support bar is made of (3), gripper shoe (4), lifting frid (5); Wherein drive screw (1) is comprised 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 of anti-, forward nut (8), (9) upper hinged some to support bar to (3), support bar is hinged on the gripper shoe (4) the other end of (3), the outer lifting frid (5) that connects of gripper shoe (4);
The second hydraulic lift device A2: hydraulic lift device A2 is connected by some joint lifting devices unit and utilizes known method welding or bolt connection end plate washer to form, hydraulic lift device A2 mainly is divided into two kinds of forms, single hydraulic lift device and double hydraulic lift device, described lifting device unit mainly are made of (c), gripper shoe (d), lifting frid (e), jack (f), support pier (g), chute (h), connection push pedal (i) smooth strut (a), the collar (b), support bar; Its smooth strut (a) is comprised of smooth shaft, and cover has the collar (b) on it; The collar (b) is fixed on the support pier (g), and support pier (g) places chute (h); Support bar is hinged on the collar (b) (c) end, and support bar is hinged on the gripper shoe (d) the other end of (c), the outer lifting frid (e) that connects of gripper shoe (d); During single hydraulic lift device, jack (f) is fixed on the middle bottom lifting frid (e) of adjacent two non-support piers with pin joint (g), and two ends link to each other with two support piers (g) respectively; During double hydraulic lift device, jack (f) places in the middle of two adjacent one group of non-connection push pedal (i) with pin joint, and jack (f) self is fixed on the bottom lifting frid (e), and two ends link to each other with junction plate (i);
The third expansion lifting device A3: expansion lifting device A3 is connected by some joint lifting devices unit and utilizes known method welding or bolt connection end plate washer to form, each saves lifting device unit and mainly is comprised of upper strata lifting frid (m), lower floor's lifting frid (n), groove (p), water supply hole (q) four parts and has reserved water supply hole (q) in the upper strata lifting frid (m), on inner relative with lower floor lifting frid (n) face of water supply hole (q) aperture is arranged; Lower floor's lifting frid (n) is reserved groove (p), deposits expanding material in the groove (p), and while and upper strata lifting frid (m) are chimeric.
3. but the tabular lifting device of a kind of one dimension expansion according to claim 1 and 2, it is characterized in that: the lifting utensil is the clamping plate shape utensil of termination band block device.
4. the expanding material of carrying in according to claim 2 is that (calcining heat is 800-1000 ℃ of insulation 10 hours to commercial lime, calcium oxide content is greater than 90%), one or more combinations of magnesia (calcining heat is 1000-1200 ℃ of insulation 8 hours, and content of magnesia is greater than 85%), calcium sulphoaluminate, gypsum, slag.
5. the method for the existing highway subgrade roadbed subsidence of a kind of lifting that proposes of the present invention is characterized in that: adopt following steps to carry out:
The first step: the lifting device that will respectively be in successively contraction state at road under the one-sided or road surface, both sides is implanted the soil layer projected depth by the position level of design;
Second step: make successively step by step vertical expanding extruding soil layer of each lifting device by order, spreading rate, the expansion amplitude of designing requirement, until keep reasonable time after being expanded to the expansion amplitude of design;
The 3rd step: the order by design is packed up the lifting device successively, and the block materials of the hole same size that will form with lifting device expansion implants in this hole, and injects known gel rubber material slurry and make it to fill up the hole that the lifting work progress causes at the soil body by the injected hole in this block materials.
6. three kinds of lifting devices proposing of the present invention, its operating principle is characterised in that:
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 the support bar that is hinged on reverse nut (8) and the forward nut (9) outwards protruding to (3) other end, promote outwards motion of gripper shoe (4), gripper shoe (4) heads on lifting frid (5) and opens, lifting frid (5) directly pushes the lifting soil layer, until be expanded to the design rising height;
When adopting hydraulic lift device A2, the powered support pier (g) that produces by jack (f) moves, and then the collar (b) drives hinged support bar on it (c) is moved, support bar is outwards protruding to (c) other end, promote outwards motion of gripper shoe (d), gripper shoe (d) heads on lifting frid (e) and opens, and lifting frid (e) directly pushes the lifting soil layer, until be expanded to the design rising height;
When adopting expansion lifting device A3, in the prefabricated groove (p) of lower floor's lifting frid (n), fill expanding material, simultaneously upper and lower layer lifting frid is fastened whole the implantation in the soil layer; Supply water by water supply hole (q) prefabricated in the upper strata lifting frid (m), make water contact the rear expansion force promotion upper strata lifting frid (m) that produces with expanding material and slowly push the lifting soil layer, until be expanded to the design rising height.
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| CN113107191A (en) * | 2021-03-29 | 2021-07-13 | 泉州市中原盛辉地产代理有限公司 | Construction method for mounting honeycomb core |
| CN114855523A (en) * | 2022-06-10 | 2022-08-05 | 温州市市政管理中心 | Lifting and reinforcing device and method for subgrade settlement |
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| CN114855523B (en) * | 2022-06-10 | 2024-06-04 | 温州市市政管理中心 | Lifting and reinforcing device and method for roadbed settlement |
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