CN1290789A

CN1290789A - Method for treating subsidence of road surface plate or attachment strap and subsidence treating apparatus

Info

Publication number: CN1290789A
Application number: CN 00117578
Authority: CN
Inventors: 张肖宁; 谭积青
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2000-11-15
Filing date: 2000-11-15
Publication date: 2001-04-11

Abstract

During the construction of road surface plate, preburied part is first buried below the surface plate, and after the subsidence stabilizes, the road surface plate is raised to original elevation and the gap below the plate is filled. The subsidence treating apparatus consists of casing, handle, oil relieving screw, non-return valve, piston, outer garter spring, sealing ring, wear reducing ring, cylinder, push rod, sleeve, rigid steel plate, etc. connected together. The present invention can eliminate subsidence of road surface so as to prolong the service life of road.

Description

Road slab or attachment strap sedimentation improvement method and sedimentation controlling device thereof

The present invention is road slab or attachment strap sedimentation improvement method and sedimentation controlling device thereof, belongs to highway and urban road engineering technology and equipment.

In highway sections such as the abutment platform back of the body, high fills embankment, soft foundations, mould the native fixed and irrecoverable compression that under the effect of load and moisture, certainly will produce to a certain degree because filling material and ground be soft, cause the sedimentation deformation of road slab or attachment strap, cause the road surface harm such as bumping at bridge-head, faulting of slab ends, cracking to occur, had a strong impact on the function of use and the life-span on road surface.The harm that subgrade settlement causes under the road surface in civil works is that the road worker quite feels stubborn problem always, does not obtain fine solution always.This harm occurs with forms such as the local depression in road surface, road slab faulting of slab ends, crackings in engineering usually, directly influences the engineering functional performance, shortens engineering application life, for country causes very large economy loss with construction engineering units.In prevention and this harm process of improvement, the method and measure that the road worker usually adopts has: (1) is strict with filler composition (as using permeable materials such as gravel, gravelly soil) and compaction process (as requiring optimum moisture content, large-tonnage compacting machinary, suitable compaction in layers thickness etc.) in subgrade construction, the degree of compaction of making every effort to maximum is to reduce subgrade settlement amount in the use as far as possible; But when the depth of fill was big, this way can only reduce settling amount to a certain extent, the final governing problem of still facing sedimentation inevitably; (2) after sedimentation takes place with road slab or attachment strap boring and use the high-pressure slip-casting machine slip casting to be carried out in space at the bottom of the plate by boring.The difficulty that is difficult to overcome below existing in implementation process: 1. owing to the weight load of road slab or attachment strap, slip casting is difficulty relatively; 2. can not very accurately recover road slab or attachment strap absolute altitude and planeness, recover the road surface function of use; 3. annotate the back-up sand slurry and do not reach the preceding necessary close traffic of certain intensity, influence traffic checking and construction investment unit-economy benefit.

Purpose of the present invention be exactly for overcome and solve exist in the existing technology that solves subgrade settlement under the road surface slip casting difficulty and must close traffic, influence traffic checking, can not very accurate recovery grade elevation and the shortcoming and the problem of planeness, recovery road surface function of use etc., study invent a kind ofly can accurately recover grade elevation and planeness easily, do not need close traffic, not influence traffic checking, construction is simple and easy, operating efficiency is higher, expense is relatively low road slab or attachment strap sedimentation improvement method and sedimentation controlling device thereof.

The present invention realizes by following technical proposals: road slab or attachment strap sedimentation improvement method are: when carrying out road slab or attachment strap highway engineering construction, the built-in fitting of sedimentation controlling device of the present invention is embedded in optimal support position in the plate earlier, treat that road slab or attachment strap sedimentation are basicly stable, use the applicator lifting of roadbed subsidence controlling device to produce the road slab of sedimentation or attachment strap to former design elevation, the space is carried out mortar and is annotated and to fill out at the bottom of using high-pressure slip-casting equipment to plate then, before mortar reaches the length of time, do not support road slab or attachment strap, and can bear the load that traffic produced on road slab or the attachment strap by the sedimentation controlling device; For reaching road slab or attachment strap are raised to the absolute altitude desired value, also for reducing control expense, controlling device is made of applicator and built-in fitting, wherein built-in fitting is embedded in the plate according to the Force Calculation analysis result when road slab or attachment strap construction, so then in whole construction course, have only built-in fitting to become running stores, and applicator has in fact only played construction tool, can reuse.The structural representation of road slab or attachment strap sedimentation controlling device applicator is as shown in Figure 1: the structural representation of sedimentation controlling device built-in fitting as shown in Figure 2.The sedimentation controlling device is by sleeve pipe 1, handle 2, the screw 3 of draining the oil, flap valve component 4, piston 5, outer snap ring 6, y-type seal ring 7, wearing ring 8, cylinder barrel 9, push rod 10, cutting ferrule 11, handle 12, interior snap ring 13, hex nut 14, packing ring 15, nut 16, sleeve 17, moving cup 18, bolt 19, felt seal 20, rigidity backing plate 21, Grouting Pipe 22, displacement meter 23, cover plate 24, collision mat 25,26, applicator that cage ring 27 connects and composes jointly and built-in fitting two big parts constitute, its mutual alignment and annexation are: applicator and built-in fitting pass four bolts hole that the applicator lower end is reserved by bolt 19 during constructing operation, and fixedly connected, and cutting ferrule 11 is inserted in the emboss pit of built-in fitting inner nut 16 by nut; Push rod 10 directly is inserted in two balls hole in built-in fitting and the applicator; Handle 12 directly is inserted in the hole slot of cylinder barrel 9 and cutting ferrule 11 reservations, and can pull cutting ferrule 11 and do to horizontally rotate; Displacement meter 23 can be fixed on applicator lower shoe upper surface by the magnetic force dial framework; Push rod 10, cutting ferrule 11, hex nut 14, displacement meter 23 can be folded down and deposit in the time of needn't constructing; Applicator middle sleeve 1 directly is enclosed within outside the handle 2, and colludes into top, cylinder barrel 9 side hole slot to guide and support applicator with handle 2; Drain the oil screw 3, flap valve component 4 is fixed in the applicator upper surface centre bore by screw thread above it; Piston 5, outer snap ring 6, y-type seal ring 7, wearing ring 8 are stuck in cylinder barrel 9 inner cores by outer snap ring 6; Cutting ferrule 11 is stuck on cylinder barrel 9 inner tube walls by interior snap ring 13; Rigidity backing plate 21 directly buries and is placed on during plate goes to a grassroots level in the built-in fitting, makes its upper surface concordant with the basic unit end face, and sealing Grouting Pipe 22 lower ending openings; Sleeve 17 is positioned over rigidity backing plate 21 upper surfaces, and is cast in road slab or the attachment strap concrete; Grouting Pipe 22 is welded on sleeve 17 external surfaces and passes sleeve 17 upper and lower side preformed holes; Bolt 19 directly penetrates four pairs of prepared screw-bolt holes of sleeve 17 upper and lower sides; Moving cup 18 is enclosed within sleeve 17 inner cores, and can freely slide up and down in tube; Nut 16 invests sleeve 17 inwalls by screw thread, and moves down by the moving cup 18 of screw thread ejection; Packing ring 15, cover plate 24, collision mat 25 directly are enclosed within on the bolt 19, and are isolated by cage ring 27 and concrete; Collision mat 26 is pasted on cover plate 24 lateral surfaces.The operating principle of this sedimentation controlling device is as follows: according to the Force Calculation analysis result built-in fitting is embedded in appropriate location in the plate in advance when road slab or attachment strap construction; Behind settlement stability, just can be folded down cover plate 24, collision mat 25,26 installation applicators and be pressed into fluid for the screw 3 of draining the oil by oil pump or oil gun makes the downward jacking pressure of applicator (being hydraulic jack) pass to the moving cup 18 of built-in fitting by push rod 10, be delivered to basic unit by rigidity backing plate 21 then, thereby conversion is to the pulling force of bolt 19, this pulling force passes to road slab or attachment strap by built-in fitting and concrete bonding, weight load with base plate, and reach the purpose of lifting plate, also overcome the shortcoming of slip casting difficulty simultaneously.When applicator applies jacking pressure, can move down by the nut 16 that cutting ferrule 11 and handle 12 turn in the built-in fitting, and control the value of moving down of nut 16 so that road slab or attachment strap absolute altitude accurately return to desired value by the show value of displacement meter 23; After applicator is deactivated, stop 18 travelling backwards of moving cup simultaneously, and carry, thereby reach the purpose that does not influence traffic checking by nut 16, moving cup 18 weight load and automobile axle of base plate before mortar does not reach the length of time by nut 16; After applicator is deactivated, just can use slurry filling machine to pass through Grouting Pipe 22 usefulness mortar or cement pastes, and can mix early strength admixture, space at the bottom of the notes fill plate, along with the increase of mortar strength slowly relaxes the stressed of plate and built-in fitting, because built-in fitting is a steel part, the spy prevents rainwater infiltration by collision mat 25 and 26, in order to avoid corrosion built-in fitting, for the penetrated that prevents to go to a grassroots level at load action destroys, special in the built-in fitting bottom substrate embedding rigidity backing plate 21, make rigidity backing plate 21 seal the bottom of Grouting Pipe 22 simultaneously, in order to avoid concrete stops up Grouting Pipe 22 outlets during the road slab construction.

The present invention compared with prior art, have following advantage and beneficial effect: (1) can thoroughly administer road surface (comprising highway, airport, urban road, harbour) sedimentation harm with the present invention, recover grade elevation and flatness target value exactly, strengthen the road surface function of use, prolong service life of road surface, create good economic benefit and social benefit; (2) implement to use the present invention, construction organization is convenient, only needs to be equipped with a little amount of work personnel and conventional mechanical equipment, and the staff can be on duty through simple training, required plant equipment is common equipment (mud jacking equipment, small-sized oil pump or oil gun), only needs less input to get final product organizing construction; (3) apparatus of the present invention operations is simple and easy, only need when pavement construction built-in fitting is embedded in advance in the plate appropriate location just can, administer operation after waiting sedimentation to take place, do not influence the construction of road slab or attachment strap; (4) since apparatus of the present invention built-in fitting can base plate in annotating back-up sand slurry intensity increase process weight and above traffic loading, do not influence traffic checking when administering construction, for the engineering operating organization brings certain economic benefit; (5) this controlling device manufacturing process is simple, and composition material is conventional material, and the part parts can be directly buy from market, does not need complicated production line and production technology, can be produced by small-sized machine processing enterprise tissue; (6) enforcement expense of the present invention is cheap, and having only built-in fitting and notes back-up sand to starch in the improvement construction is running stores, and all the other equipment (comprising applicator) are construction tool; A built-in fitting cost needs 300 yuan approximately, administers a block road plate or attachment strap and only needs 2～4 built-in fittings.

Below Figure of description is further specified as follows: Fig. 1 is this sedimentation controlling device applicator structural representation, and Fig. 2 is a sedimentation controlling device embedded part structure schematic diagram.

Embodiments of the present invention can be as follows: press shown in Fig. 1～2 (1), design, processing and manufacturing or choose the applicator of sedimentation controlling device of the present invention and each parts of built-in fitting, its part number, title, quantity, optional material and size, optional model, manufacture method etc. are asked for an interview following table 1.Table 1:

In the table 1 size system (surpassing 20 grades of maximum allowable axle loads (the heavy 280KN of rear axle) in B * L * H=6.25m * 8.0m * 0.35m) and the carload designs according to maximum size in the transition slab at bridge head commonly used, greater than this design value, can satisfy concrete load requirement as the volume of road slab in the reality or attachment strap and traffic loading by the stressed sectional dimension that Force Calculation increase cylinder barrel 9, nut 16, moving cup 18, bolt 19.The thickness h of cover plate 24 (mm) is road slab or attachment strap thickness-202mm, and can produce thickness according to thickness of slab commonly used is that the cover plate 24 of h (mm) changes to adapt to thickness of slab, and all the other sizes can remain unchanged; (2) processing and manufacturing and chosen each parts after, by described each parts mutual alignment of top manual and annexation thereof connection is installed, just can implement sedimentation controlling device of the present invention preferably; (3) install sedimentation controlling device of the present invention after, just can use enforcement by described road slab of the present invention of top manual or attachment strap sedimentation improvement method, just can implement the present invention preferably.Processing and manufacturing at sedimentation controlling device of the present invention is installed in the implementation process, should note following item: be coated with after the applicator external surface is primed with red paint again; Each active-surface should be coated with an amount of lubricating grease in the assembling; The built-in fitting exposed face should be processed into hair side, before the construction rigidity backing plate 21 is soaked a moment or be coated with butter in machine oil, and each surface, built-in fitting inside all is coated with butter, with anti-corrosion; During installation, require Grouting Pipe 22 bottoms concordant, so that rigidity backing plate 21 upper surfaces seal its lower ending opening when pre-buried with moving cup 18 bottoms; Require when the B mouth injects lubricating grease with the pressure of 40MPa the C mouth must not draining to flap valve component 4; Applicator maximum functional top lift must not be less than 150KN, jacking stroke 〉=100mm, and when producing the 150KN top lift, the flap valve component 4 and screw 3 places that drain the oil all must not drainings; After jacking device was contained on the sleeve 17, rear push-rod external surface and cutting ferrule 11 inner surfaces must not be collided in 10 liang of bulbs of push rod fall into the ball hole, and nut 16 should rotate freely with cutting ferrule when rotating cutting ferrule with handle 12; Grouting Pipe 22 upper end open 50mm inwalls can be processed into screw thread; Use method step and the required plant and instrument implemented as follows: (1) specific implementation method: to utilize the surface plate shell theory to calculate the optimal support position (being about) of simply supported slab under the load action apart from edges of boards 1/4 place, when carrying out the plate construction, built-in fitting (2～4) is embedded in optimal support position in the plate, treat the basicly stable back of subgrade settlement (generally needing 1～2 rainy season approximately), use 2～4 applicators simultaneously each built-in fitting to be applied top lift, plate is lifted to former design control absolute altitude, and the Grouting Pipe by built-in fitting to plate at the bottom of space slip casting backfill (also can in used slip casting, mix a certain amount of early strength admixture); (2) required plant and instrument: mortar mixing apparatus (as available 200L mortar mixer); Grouting equipment (general single fluid grouting machine); Oil pump or oil gun (as available GB1164-79, GB1165-79); Height measurement equipment (level gauge); Instruments such as die nut, magnetic force dial framework; (3) concrete operations step: the optimal support position of 1. calculating deadweight load action lower plate; 2. carrying out plate when construction, will in machine oil, soak for a moment the rigidity backing plate of (or being coated with full butter) and be embedded in the optimal support position goes to a grassroots level, making end face concordant with the basic unit end face; 3. bolt (4) is passed 4 pairs of bolts hole of built-in fitting, and cover collision mat and cover plate; 4. built-in fitting is positioned over rigidity backing plate central authorities, puts cage ring, continue the board concrete casting and constructing; 5. treat the basicly stable back of sedimentation (generally needing 1～2 rainy season approximately), measure the settling amount δ of built-in fitting location plate; 6. tick cover plate and collision mat by cover plate upper surface preformed hole with cleek, and packing ring 15 is packed into the bolt exposed portions serve respectively; 7. push rod is fallen into applicator and built-in fitting ball hole, and 4 bolts that built-in fitting exposes are penetrated 4 bolts hole in applicator lower end, applicator is placed on the built-in fitting; Hex nut is tightened on the bolt, applicator firmly is connected with built-in fitting; 8. with the magnetic force dial framework displacement meter is fixed on the applicator plate upper surface, makes the displacement meter feeler lever, and the displacement meter reading is returned to zero by base plate preformed hole conflict built-in fitting inner nut upper surface; 9. with oil pump or oil gun the flap valve component is pressed into fluid, pulls the moving cup of built-in fitting inner nut pushing tow with the handle level simultaneously and move down; When the displacement meter reading stops to pull handle during to δ and presses oil, and unscrew the screw of draining the oil drain the oil (also recyclable); 10. turn hex nut and be folded down applicator, and be folded down displacement meter and oil pump or oil gun and packing ring 15; With grouting equipment by Grouting Pipe to plate at the bottom of space slip casting (also can in mortar, mix early strength admixture), up to the edges of boards mortar of emerging; Fold grouting equipment, lay collision mat and cover plate.

Claims

1, a kind of road slab or attachment strap sedimentation improvement method, it is characterized in that: when carrying out road slab or attachment strap highway engineering construction, the built-in fitting of sedimentation controlling device of the present invention is embedded in optimal support position in the plate earlier, treat that road slab or attachment strap sedimentation are basicly stable, use the applicator lifting of roadbed subsidence controlling device to produce the road slab of sedimentation or attachment strap to former design elevation, the space is carried out mortar and is annotated and to fill out at the bottom of using high-pressure slip-casting equipment to plate then, before mortar reaches the length of time, do not support road slab or attachment strap, and can bear the load that traffic produced on road slab or the attachment strap by the sedimentation controlling device.

2, a kind of road slab or attachment strap sedimentation controlling device, it is characterized in that: it is by sleeve pipe (1), handle (2), the screw (3) of draining the oil, flap valve component (4), piston (5), outer snap ring (6), y-type seal ring (7), wearing ring (8), cylinder barrel (9), push rod (10), cutting ferrule (11), handle (12), interior snap ring (13), hex nut (14), packing ring (15), nut (16), sleeve (17), moving cup (18), bolt (19), felt seal (20), rigidity backing plate (21), Grouting Pipe (22), displacement meter (23), cover plate (24), collision mat (25), (26), applicator that cage ring (27) connects and composes jointly and built-in fitting two big parts constitute, its mutual alignment and annexation are: applicator and built-in fitting pass four bolts hole that the applicator lower end is reserved by bolt (19) during constructing operation, and fixedly connected, and cutting ferrule (11) is inserted in the emboss pit of built-in fitting inner nut (16) by nut; Push rod (10) directly is inserted in two balls hole in built-in fitting and the applicator; Handle (12) directly is inserted in the hole slot of cylinder barrel (9) and cutting ferrule (11) reservation, and can pull cutting ferrule (11) and do to horizontally rotate; Displacement meter (23) can be fixed on applicator lower shoe upper surface by the magnetic force dial framework; Push rod in the time of needn't constructing (10), cutting ferrule (11), hex nut (14), displacement meter (23) can be folded down and deposit; Applicator middle sleeve (1) directly is enclosed within outside the handle (2), and colludes into cylinder barrel (9) top, side hole slot to guide and support applicator with handle (2), and the screw of draining the oil (3), flap valve component (4) are fixed in the applicator upper surface centre bore by screw thread above it; Piston (5), outer snap ring (6), y-type seal ring (7), wearing ring (8) are stuck in cylinder barrel (9) inner core by outer snap ring (6); Cutting ferrule (11) is stuck on cylinder barrel (9) inner tube wall by interior snap ring (13); Rigidity backing plate (21) directly buries and is placed on during plate goes to a grassroots level in the built-in fitting, makes its upper surface concordant with the basic unit end face, and sealing Grouting Pipe (22) lower ending opening; Sleeve (17) is positioned over rigidity backing plate (21) upper surface, and is cast in road slab or the attachment strap concrete; Grouting Pipe (22) is welded on sleeve (17) external surface and passes sleeve (17) upper and lower side preformed hole; Bolt (19) directly penetrates four pairs of prepared screw-bolt holes of sleeve (17) upper and lower side; Moving cup (18) is enclosed within sleeve (17) inner core, and can freely slide up and down in tube; Nut (16) invests sleeve (17) inwall by screw thread, and moves down by the moving cup of screw thread ejection (18); Packing ring (15), cover plate (24), collision mat (25) directly are enclosed within on the bolt (19), and are isolated by cage ring (27) and concrete; Collision mat (26) is pasted on cover plate (24) lateral surface.