CN102995551A - Method for adjusting bridge floor-road surface differential settlement at road-bridge joint of in-service highway - Google Patents
Method for adjusting bridge floor-road surface differential settlement at road-bridge joint of in-service highway Download PDFInfo
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Abstract
The invention discloses a method for adjusting the bridge floor-road surface differential settlement at a road-bridge joint of an in-service highway, belonging to the technical field of road and bridge building engineering. The method comprises the following steps of: punching on proper parts in a section experiencing road surface settlement at the road-bridge joint at the bridgehead; placing an expansion material into the hole and extruding densely; sealing the orifice with soil or other materials; and extruding the soil body around by the volume expansion of the expansion material to push the soil body above to move upward so as to generate upward displacement of the sunk road surface and achieve the aim of recovering flatness of the sunk road surface. According to the invention, the expansion material has controllable delay expansion property, and the differential settlement at the road-bridge joint of the in-service highway can be accurately recovered. The construction material is economical, the construction method is simple, the construction is finished without influencing vehicle operation, and the method is a processing method which has low cost and can accurately control the foundation settlement amount and increase the road surface height.
Description
Technical field
The present invention relates to a kind of method that is adjusted at the road and bridge joint portion bridge floor road surface relative settlement of labour highway, belong to the road and bridge construction engineering technical field.
Background technology
The connecting portion of Lu Yuqiao can cause the relative settlement on bridge floor and road surface because of the sedimentation on road usually in the road, thereby causes vehicle pitching, i.e. so-called " bumping at bridge-head " phenomenon.Problem of bumping at bridge-head is one of difficult problem of puzzlement road and bridge engineering always, and it directly affects occupant's comfort, the safety of goods, reduces simultaneously the vehicle life-span, can cause occupant injury even vehicle to overturn when serious.And there is no at present elimination in the cost-effective technical measures of labour highway bridgehead vehicle jump phenomenon.
Summary of the invention
The method that the purpose of this invention is to provide a kind of regulation and control, the road and bridge relative settlement of elimination end of the bridge is to eliminate vehicle bump at bridge ends.
The reason that road and bridging connect the settlement difference generation at position mainly is because the soil rigidity of bridge is generally larger, usually produces hardly sedimentation at run duration; And the rigidity of the roadbed of road and foundation material is relatively low, under the repeated action of vehicle operating load, with the larger sedimentation and deformation of growth generation of running time.For this situation, the present invention's employing suitable position in the roadbed that sedimentation occurs or ground is implanted the method for suitable expanding material, by implanting the volume expansion of the expanding material in roadbed or the ground, the sink deformation on road surface is recovered.
The concrete practice is as follows:
At the section of end of the bridge road and bridge joint portion roadbed subsidence, select the suitable position punching, to desired depth, then expanding material is put into the predetermined section dense extrusion in hole, at last the aperture is sealed with soil or other materials, prevent the reaction of expanding material and air ambient.Then pass through between each component of expanding material and and water in soil between reaction, volume expansion occurs, the extruding surrounding soil, around in the closely knit situation of the soil body, the volume expansion of expanding material will promote on it earthing body to top offset, and then the road surface of depression is produced to top offset, make the depression road surface recover smooth purpose thereby reach.
Lower beating can be beaten or be tilted to punching recited above straight down on the road surface, also can be under road surface, road both sides certain distance level in road, beating of beating or tilt in the road.Wherein under road surface, road both sides the certain distance level that roadbed subsidence is adjusted during punching in the road is most effective, and the road pavement structural damage is minimum, is preferred version.
The diameter in above-mentioned hole, the degree of depth and quantity should be determined according to actual roadbed subsidence amount.The desired depth of punching is also decided according to actual conditions, level is to when punching, and desired depth is that settling zone is had a lot of social connections apart from far-end border or the unidirectional track in aperture, when downward punching, desired depth is that the ground void ratio is the regional extent of the void ratio of designing requirement, and void ratio is less than 58%.The aperture can be between 5cm～10cm.The mode of punching can adopt the casting method, is about to such as the known technology boring method, revolve the method for digging outside the native delivery port in the hole; Also can adopt not casting method, the soil that namely will be in the position, hole in pore forming process presses to the soil body all around, rather than discharges from the aperture.Usually the tubular apparatus of use side headband block device screws in known method by static pressure, hammering, vibration and spiral tubular apparatus is squeezed in the soil, realizes not casting method pore-forming.
Implant the expanding material of native mesopore, the performance efficient of its effect depends on its compaction rate in the hole.The degree of compaction of the expanding material in the soil is higher, and its performance expansion efficient is higher, makes expanding material obtain abundant compacting in the hole and can adopt following 3 kinds of methods:
The first: will have the pipe of the unidirectional block in end to implant in the soil after the desired depth, and in pipe, add expanding material, and be slightly less than the round bar of bore with diameter with the expanding material dense extrusion; Limit extruding round bar, outer taking out will be managed in the limit; Taking out the pipe amplitude can fill without the whole volumes of pore section after with the expanding material compacting that adds and be advisable; The process that pipe is outwards taken out on repetitive padding expanding material, extruding round bar limit, limit, the hole section of expanding material is all filled up expanding material and compacting is as the criterion until plan adds.Then the aperture is tamped with soil or other materials.The actual degree of compaction of expanding material can be according to aperture and the expanding material of inserting Mass Calculation, and with predetermined compaction Control, general degree of compaction will reach more than 85%.Degree of compaction is higher, and the effect of adjusting sedimentation is larger.After pipe is squeezed into desired depth, extract the way that occasion that pipe can produce the hole of collapsing can be selected this densification expanding material, the method that namely fill on the limit and pipe is taken out on compacting expanding material, limit before the expanding material if fill.
The second: expanding material is inserted in the mould of diameter less than pore-forming pipe external diameter 1-10mm, with forcing press expanding material is pressed into the expanding material cylindrical piece of specifying degree of compaction (bulk density), the length sum of described cylindrical piece equals the desired depth in hole.To there be the pipe of the unidirectional block in end to implant in the soil after the desired depth, extract pipe, realize punching; Fill in successively in the hole expanding material cylindrical piece and compacting, then envelope is filled out in the aperture.After the pipe of squeezing into desired depth was extracted, the hole can keep shape, the hole of can not collapsing, and then can adopt this method to insert expanding material and make expanding material closely knit.
The third: will there be the pipe of the unidirectional block in end to implant in the soil and add expanding material in the backward pipe of desired depth, be slightly less than the round bar of bore with diameter with the expanding material compacting.Then making round bar ram expanding material makes expanding material squeezed in the soil body towards periphery, the limit is filled the expanding material limit and is rammed, pipe is outwards taken out on the limit, repeat above-mentioned steps, fill the hole section of expanding material all fills up to plan, pipe is all extracted out, and so that expanding material in soil squeezed formation greater than the column of bore dia.The diameter of the expanding material column of squeezed rear formation is decided by that round bar rams vibratory compaction energy and soil body compaction rate.
Described expanding material is comprised of two sections of material, i.e. expansion component and filling components.Wherein to account for the percentage by weight of whole expanding materials be 60%～100% to expansion component, and all the other are filling components, and described expanding material also can be made of expansion component separately.Described expansion component has following three classes:
(1) lime of calcining gained under proper temperature.Satisfying relevant national standard quicklime such as quality, also can be burning quicklime or quicklime and the combination of crossing burnt lime.Wherein the temperature range of calcining is 900 ℃～1200 ℃, and the lime calcining time surpasses normal calcination time 4～10 hours.
(2) magnesia that calcining produces under proper temperature comprises the combination of dead burned magnesia and light calcined magnesia and dead burned magnesia and light calcined magnesia, and wherein the active oxidation content of magnesium is greater than 75%.The magnesia calcining heat is 800 ℃～1450 ℃, calcining insulation 1～10 hour.
(3) combination of materials of calcium sulphoaluminate class can be generated, be i.e. calcium sulphoaluminate can be generate after the various ingredients reaction.For example: sulphate aluminium cement adds gypsum; High alumina cement adds gypsum; Aquation aluminic acid four calcium add gypsum; Tricalcium aluminate adds gypsum; Aluminum sulfate adds lime and adds gypsum; Calcined alunite adds gypsum; Natural alumstone adds gypsum etc., and the proportioning between above-mentioned each component can be with reference to existing known technology, and known technology can with reference to Xue Jun ?, the big chief editor's in Wuzhong teaching material " expansive and self-stressing cement and application a thereof " book, be published by China Construction Industry Press.
Can select as the case may be in the practical operation in the above-mentioned three class expansion components a kind of, two kinds or three kinds make up to control expansion rate and expanding volume.The particle diameter of expanding material is to be advisable less than 1/2 aperture.
Described filling components is that flyash, slag, calcining coal gangue, slag and other contain industrial residue or the natural materials of active silica, active oxidation aluminium component.Filling components should with its levigate to particle diameter less than 80um.
Above-mentioned expansion component and filling components are got suitable ratio and particle diameter distribution according to actual needs, can use after stirring.
In soil, usually can contain a certain amount of water; therefore if expanding material then considerable part expand and occur in the work progress rapidly to use the water-swellable such as quicklime; expand to free space; this moment is real, and to be used for the expansion loss of extrusion soil very large, therefore should adopt the expanding material that delay a period of time just expands more favourable.On the other hand, the soil body is the shot structure, under slowly expansion, the adjustment of soil body self structure can progressively form compact earth, if and adopt faster expanding material of expansion rate, the soil body that rapid expansion can make nearly expansion sources then may not obtain compacted because producing inhomogeneous excess in displacement structural deterioration from the longer-distance soil body of expansion sources.Therefore, the expanding material that the expanding material that uses should adopt time lagged swelling and slowly expand, can adopt burnt lime and dead burned magnesia, and be combined to form the different combination of materials of expansion rate by certain burning degree, and form the expanding material that progressively expands with certain mechanical fraction.
The invention has the advantages that:
(1) expanding material that uses has the controllable delay expansion characteristics, can accurately be to repairing in the relative settlement of labour highway road and bridge junction.
(2) construction material economy, job practices are simple, can finish construction under the condition that does not affect vehicle operating, are the processing methods that can accurately control settlement of foundation and lifting pavement-height with low cost.
The specific embodiment
Below in conjunction with embodiment the present invention is further specified.
Embodiment one
Certain bumping at bridge-head is administered engineering, and know according to exploration report: the soil layer of engineering ground is sand, and road structure thickness is 0.65m, and Subgrade Compaction is 93%, and end of the bridge place road surface maximum settlement is 26mm.Adopt not casting of static pressure punch method in following 0.3m place, road two lateral extent road structure bottom surface level in road, punching, design punching length is end of the bridge place road one half-breadth 6m, beat first hole apart from end of the bridge 50mm place, the aperture is 70mm, and be arranged in a row to punching successively away from end of the bridge with the spacing of 90mm, 3 holes are made a call to respectively in every kind of aperture, and pore size is respectively the pipe punching that the end block is arranged of 70mm, 60mm, 50mm; Wherein expanding material constituent mass percent is: commercial lime (temperature is calcined acquisition under 1150 ℃ condition, be incubated 10 hours, and calcium oxide content is greater than 90%) 90%, calcining coal gangue 10%.Wherein the particle diameter of commercial lime distributes and to account for gross mass percentage and be:＜5mm accounts for 15%, 5mm～30mm and accounts for 85%, and powder containing quantity is about 10%.
Adopt the first to insert mode when filling expanding material: the pipe that is about to the unidirectional block in end is squeezed in the soil after the desired depth, the Site expanding material, expanding material is stirred, then in pipe, add expanding material, be slightly less than the round bar of bore with diameter with the expanding material dense extrusion; Fill in the expanding material process, pipe is taken out outside the extruding round bar limit in the limit, and the hole section of expanding material is all filled up expanding material and compacting is as the criterion until plan is filled out.After the densification, the expanding material degree of consolidation is reached more than 95%, and is ramming to not redeformation of expanding material with small-sized hammer ram at a distance of 0.5m place, aperture, at last with gravelly soil with the aperture compacting of binding.
Embodiment two
Certain bumping at bridge-head is administered engineering, and know according to exploration report: the soil layer of engineering ground is silty clay, and road structure thickness is 0.60m, and Subgrade Compaction is 92%, and end of the bridge place road surface maximum settlement reaches 27mm; Adopt spiral screw in not casting method following 0.35m place, road two lateral extent subgrade and pavement bottom surface level in the road with the pipe punching that the end block is arranged, design punching length is end of the bridge place road one half-breadth 5m, apart from making a call to the first hole and be arranged in a row to punching successively away from end of the bridge with the spacing of 90mm in end of the bridge 45mm place, the aperture all is 60mm, and the hole from end of the bridge from close to be hole 1 to label far respectively, hole 2, hole 3, hole 4, hole 5, hole 6, hole 7, hole 8, hole 9; Its mesopore 1, expanding material 1 is adopted in hole 2 and hole 3, hole 4, expanding material 2 is adopted in hole 5 and hole 6, hole 7, expanding material 3 is adopted in hole 8 and hole 9;
Wherein expanding material 1 constituent mass percent is: (calcining heat is 1000 ℃ of insulations 10 hours to commercial lime, calcium oxide content is greater than 90%) 20%, (calcining heat is 1450 ℃ of insulations 10 hours to magnesia, the active oxidation content of magnesium is greater than 85%) 30%, sulphate aluminium cement 30%, gypsum 15%, slag 5%;
Expanding material 2 constituent mass percents are: commercial lime 40%, magnesia 20%, sulphate aluminium cement 20%, gypsum 10%, slag 10%;
Expanding material 3 constituent mass percents are: commercial lime 45%, magnesia 20%, sulphate aluminium cement 10%, gypsum 5%, calcining coal gangue 20%; Lime, the particle size distribution range of magnesia and sulphate aluminium cement account for gross mass percentage and is:＜5mm accounts for 20%, 5mm～30mm and accounts for 80%, and powder containing quantity is about 15%;
Adopt the third to insert mode when filling expanding material: the pipe that is about to the unidirectional block in end is implanted in the soil and is added expanding material in the backward pipe of desired depth, is slightly less than the round bar of bore with diameter with the expanding material compacting.Then making round bar ram expanding material makes expanding material ram expansion in the soil body towards periphery, the limit is filled the expanding material limit and is rammed, pipe is outwards taken out on the limit, repeat above-mentioned steps, fill the hole section of expanding material all fills up to plan, so that expanding material rams the column expand into 1.2 times of former bore dias, and tamp with the rendzinas densification of binding apart from 0.5m place, place, aperture.
Embodiment three
Certain engineering ground is the Muddy Bottoms silty clay, and road structure thickness is 0.68m, and end of the bridge place road surface maximum settlement is 29mm, Subgrade Compaction is 92%, and because of the ground leakiness, the ground void ratio is 0.63, then need the dense extrusion ground, so adopt following two kinds of operations:
(1) adopting spiral screw-in punch method to use at following 0.5m place, road two lateral extent road structure bottom surface has the pipe of end block to be tilted to the road internal punches, and begin to make a call to the first hole apart from end of the bridge 60mm place, and punch away from end of the bridge with the spacing of 80mm, pore size is unified to be 50mm, the gradient in hole becomes 30 degree with the road surface, the punching degree of depth is 7m.The expanding material of certain component is mixed, and importing long is in the barrel-shaped mould of 0.25m, uses the forcing press dense extrusion, makes the expanding material cylindrical piece.Expanding material is according to degree of depth segmented configuration from the inside to surface, and every section is 2m, and its expanding material constituent mass percent is:
5m～7m: commercial lime (calcining heat is 1200 ℃, is incubated 10 hours, and calcium oxide content is greater than 90%) 20%, magnesia (calcining heat is 1150 ℃, is incubated 7 hours, and the active oxidation content of magnesium is greater than 85%) 50%, tricalcium aluminate 20%, gypsum 10%;
3m～5m: commercial lime 50%, magnesia 30%, tricalcium aluminate 10%, gypsum 5%, gangue 5%;
1m～3m: commercial lime 50%, magnesia 30%, calcining coal gangue 20%;
Less than 1m: envelope is filled out in rubble and rendzinas densification.
Commercial lime wherein, the particle size distribution range of magnesia and tricalcium aluminate accounts for gross mass percentage and is:＜5mm accounts for 20%, 5mm～30mm and accounts for 80%, and powder containing quantity is about 13%;
Adopt the third to insert mode when filling expanding material: the pipe that is about to the unidirectional block in end is implanted in the soil and is added expanding material in the backward pipe of desired depth, is slightly less than the round bar of bore with diameter with the expanding material compacting.Then make and ram expanding material under the round bar and expanding material is rammed in the soil body towards periphery expand, the limit is filled the expanding material limit and is rammed, pipe is outwards taken out on the limit, repeat above-mentioned steps, fill the hole section of expanding material all fills up to plan, so that expanding material ram to expand forms the column of 1.1 times of foramen primum pipe diameters, and tamp with the rendzinas densification of binding apart from 1m place, place, aperture.
(2) employing is revolved and is dug punch method, in following 0.25m place, road two lateral extent road structure bottom surface level in road, punching, design punching length is end of the bridge road surface one half-breadth 6m, apart from beating hole that first aperture is 70mm and be arranged in a row to punching gradually away from end of the bridge with the spacing of 80m in end of the bridge 40mm place, 3 holes are made a call to respectively in every kind of aperture, and the aperture is respectively the pipe punching that the end block is arranged of 70mm, 60mm, 50mm; Wherein expanding material constituent mass percent is: (calcining heat is 1150 ℃ to magnesia, be incubated 8 hours, the active oxidation content of magnesium is greater than 80%) 30%, sulphate aluminium cement 40%, calcining coal gangue 10%, gypsum 20%, wherein magnesia and sulphate aluminium cement particle diameter distribute and to account for gross mass percentage and be: particle diameter＜5mm accounts for 14%, 5mm～30mm accounts for 86%, and powder containing quantity is about 15%.
Adopt the second to insert mode when filling expanding material apart from end of the bridge: being about to expanding material, to insert diameter be in the mould of 0.25m less than pore-forming pipe external diameter 1-10mm, length, with forcing press it is pressed into that to specify degree of compaction be 96% expanding material cylindrical piece, fill in successively in the hole expanding material cylindrical piece and compacting, and fill out the envelope densification apart from end of the bridge 0.5m place with the gravelly soil aperture.
Embodiment four
Certain bumping at bridge-head is administered engineering, knows according to exploration report: the soil layer of engineering ground is stream plastic state Muddy Bottoms silty clay, and road structure thickness is 0.72m, and the high 2m of embankment, Highway Embankment Compaction degree are 90%, and end of the bridge place road surface maximum settlement reaches 31mm.And continue to sink because the ground leakiness will cause ground, the ground void ratio is 0.65, needs first Ground Treatment, so adopt following two kinds of techniques:
(1) adopt not casting of static pressure method on the road surface, to beat straight down, vertically the punching degree of depth is 6m, begin punching apart from end of the bridge 40mm, the aperture is unified to be 100mm, adopt triangle pattern pitch-row be 500mm namely the first round make a call to 10 holes, the distance in the hole of second row and nearest two holes of first row is the same to be 500mm, the distance in adjacent two holes of the 3rd hole of arranging and second row is 500mm, beat successively, altogether make a call to 4 rounds.Expanding material is: commercial lime (calcined 15 hours for 900 ℃, wherein quicklime content accounts for 20%) 40%, magnesia (light calcined magnesia content accounts for 32% for 800 ℃ of calcining heats, calcination time 8 hours) 50%, slag 10%.It is that particle diameter＜1mm accounts for 20% that magnesia and the distribution of lime particle diameter account for gross mass percentage, and particle diameter 10mm～60mm accounts for 80%, and powder containing quantity is about 10%.
Adopt the first to insert mode when filling expanding material: the pipe that is about to the unidirectional block in end is implanted in the soil after the desired depth, the Site expanding material, expanding material is stirred, then in pipe, add expanding material, be slightly less than the round bar of bore with diameter with the expanding material dense extrusion; When filling expanding material, pipe is taken out outside the extruding round bar limit in the limit, and the hole section of expanding material is all filled up expanding material and compacting is as the criterion until plan is filled out.After the densification, the expanding material degree of consolidation is reached more than 96%, and under distance road structure bottom the 0.5m place, ram to expanding material no longer to sink with small-sized hammer ram, then it is closely knit with gravelly soil the aperture to be filled into the subgrade and pavement bottom squeeze, and the road surface adopts former ground surface material to seal real densification.
(2) adopt not casting of static pressure method in following 0.4m place, road structure bottom surface, road both sides level in road, punching, apart from making a call to hole that the first aperture is 80mm and be arranged in a row to punching gradually away from end of the bridge with the spacing of 110mm in end of the bridge 55mm place, 3 holes are made a call to respectively in every kind of aperture, punching length is that end of the bridge road surface one half-breadth is 6m, and the aperture of pipe is respectively the pipe punching that the end block is arranged of 80mm, 70mm, 60mm during the level punching; Wherein expanding material constituent mass percent is: commercial lime (calcining heat is 1100 ℃, is incubated 9 hours, and calcium oxide content is greater than 90%) 60%, tricalcium aluminate 20%, calcining coal gangue 10%, gypsum 10%.Tricalcium aluminate and lime particle diameter distribute, and to account for gross mass percentage be that particle diameter＜5mm accounts for 18%, 5mm～30mm and accounts for 82%, and powder containing quantity is about 12%;
Adopt the third to insert mode when filling expanding material: the pipe that is about to the unidirectional block in end is implanted in the soil and is added expanding material in the backward pipe of desired depth, is slightly less than the round bar of bore with diameter with the expanding material compacting.Then round bar is rammed expanding material downwards and expanding material is rammed in the soil body towards periphery expand, the limit is filled the expanding material limit and is rammed, pipe is outwards taken out on the limit, repeat above-mentioned steps, fill the hole section of expanding material all fills up to plan, so that expanding material ram to expand the column of 1.1 times of pore-forming pipe diameters, then apart from aperture 0.4m place the hole is tamped with the rendzinas densification of binding.
Claims (10)
1. one kind is adjusted at the method for using as a servant highway road and bridge joint portion bridge floor road surface relative settlement, it is characterized in that: at the section of road and bridge joint portion roadbed subsidence, select the punching position to punch to desired depth, expanding material is put into the hole dense extrusion, then with orifice sealing; Volume expansion by expanding material promotes that earthing body produces to top offset on it, causes the depression road surface to recover smooth.
2. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 1, it is characterized in that: described expanding material is made of expansion component and filling components; Wherein the expansion component quality accounts for 60%～100% of whole expanding material quality, and all the other are filling components.
3. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 2 is characterized in that: described expansion component following three classes are arranged one or more constitute:
(1) commercial lime of calcining generation, wherein the calcining heat of lime is 900 ℃～1200 ℃, temperature retention time 4～10 hours;
(2) magnesia of calcining generation, wherein the active oxidation content of magnesium accounts for more than the 75wt.%, and calcining heat is 800 ℃～1450 ℃, temperature retention time 1～8 hour;
(3) combination of materials of calcium sulphoaluminate class can be generated, be i.e. calcium sulphoaluminate can be generate after the various ingredients reaction.
4. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 3, it is characterized in that: the described combination of materials that can generate the calcium sulphoaluminate class includes but not limited to the combination of combination, natural alumstone and gypsum of combination, calcined alunite and the gypsum of combination, aluminum sulfate and the lime of combination, tricalcium aluminate and gypsum of combination, aquation aluminic acid four calcium and gypsum of combination, high alumina cement and the gypsum of sulphate aluminium cement and gypsum and gypsum.
5. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 3, it is characterized in that: the particle diameter of described expanding material is less than 1/2 aperture.
6. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 2, it is characterized in that: described filling components is industrial residue or the natural materials that contains active silica, active oxidation aluminium component, includes but not limited to flyash, slag, calcining coal gangue or slag; The filling components particle diameter is less than 80 μ m.
7. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 1, it is characterized in that: the mode of described punching adopts the casting method, perhaps directly the pipe of use side headband block device fills utensil, by static pressure, hammering, vibration and spiral screw-in method tubular apparatus is squeezed in the soil, realize not casting method pore-forming, the aperture of punching is between 5cm～10cm.
8. according to claim 1 the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement, it is characterized in that: lower beating beaten or be tilted to described punch position straight down on the sedimentation road surface, perhaps flatly beats or beat in road obliquely in road in the roadbed under road surface, sedimentation road both sides.
9. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 1 is characterized in that: expanding material is put into the hole dense extrusion adopt more than any one of following 3 kinds of methods:
(1) will have the pipe of the unidirectional block in end to implant in the soil after the desired depth, in pipe, add expanding material, with diameter less than the round bar of bore with the expanding material dense extrusion; Limit extruding round bar, outer taking out will be managed in the limit; Taking out the pipe amplitude can fill without the whole volumes of pore section after with the expanding material compacting that adds and be advisable; Repeat said process, that is: pipe is taken out outside the extruding round bar limit in filling expanding material, limit, and the hole section of expanding material is all filled up expanding material and compacting is as the criterion until plan is filled out, and degree of compaction will reach more than 95%, then envelope is filled out in the aperture;
(2) expanding material is inserted in the mould of diameter less than pore-forming pipe external diameter 1-10mm, with forcing press it is pressed into the expanding material cylindrical piece of specifying degree of compaction; The expanding material cylindrical piece is filled in the hole successively until apart from aperture 50-100cm and compacting, then envelope is filled out in the aperture;
(3) will have the pipe of the unidirectional block in end to implant in the soil and add expanding material in the backward pipe of desired depth, with diameter less than the round bar of bore with the expanding material compacting; Then round bar is rammed expanding material downwards and is made expanding material squeezed in the soil body towards periphery, the limit is filled the expanding material limit and is rammed, and pipe is outwards taken out on the limit, repeats above-mentioned steps, fill the hole section of expanding material to plan and all fill up, so that the column of diameter is managed in expanding material squeezed formation in soil greater than the hole.
10. the method that is adjusted at labour highway road and bridge joint portion bridge floor road surface relative settlement according to claim 1, it is characterized in that: described desired depth is: when level to when punching, desired depth is that settling zone is had a lot of social connections apart from far-end border or the unidirectional track in aperture, when downward punching, desired depth is that the ground void ratio is the regional extent of the void ratio of designing requirement.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114508015A (en) * | 2022-03-08 | 2022-05-17 | 河南城建学院 | Method for reinforcing and repairing bridge-head bump road surface |
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| CN114508015B (en) * | 2022-03-08 | 2023-05-02 | 河南城建学院 | Bridge head jumping road surface reinforcing and repairing method |
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| CN102995551B (en) | 2015-03-11 |
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