SE543780C2 - A lid arrangement and a method for temporary use of a lid arrangement for renewal of an asphalt top layer - Google Patents

Abstract

The invention relates to a lid arrangement, preferably temporary for use in connection with renewal of an asphalt top layer, wherein said lid arrangement is arranged to cover a hole of an inspection well, said lid arrangement comprising a lid (3) and securing means (1, 2, 5, 6A, 9, 300) arranged to securely position said lid (3) on top of the hole (7) of the inspection well, characterized in that said securing means (1, 2, 5, 6A, 9, 300) comprises a bottom plate (1) arranged with a plurality of clamping members (2) including radially movable gripping members (24) having gripping ends (24A) arranged to grip into the wall (7) of the inspection well, wherein said gripping ends (24A) are arranged to be moved past the outer edge (14) of said bottom plate (1) and a connecting member (5) arranged to facilitate anchoring of the lid (3) to said bottom plate (1). The invention also relates to a method for use of such a lid arrangement.

Description

A LID ARRANGEMENT AND A METHOD FOR TEMPORARY USE OF A LIDARRANGEMENT FOR RENEWAL OF AN ASPHALT TOP LAYER TECHNICAL FIELD The present invention relates to a lid arrangement, preferably for temporary use inconnection with renewal of an asphalt top layer, wherein said lid arrangement isarranged to cover a hole of an inspection well, said lid arrangement comprising a lid andsecuring means, arranged to securely position said lid on top of the hole of theinspection well.

BACKGROUND ART For renewal of the asphalt top layer, today's methods present a major problem linked tothe inspection Wells in the road. The problem is related to the milling of existing asphaltsurface. It is necessary to first remove a layer from the existing asphalt top layer beforenew asphalt is added, which removal is performed by means of a milling cutter. Inconnection with this, the inspection Wells in the road must be lowered so that themilling cutter does not hit the well lid, which will result in damage of the milling cutter.

A milling cutter of today uses diamond teeth for efficient milling. These diamond teethare very expensive about EUR 200-300 each. If a milling cutter comes into contact withthe well lid, there is a risk that many tens of teeth will be destroyed. It may happen thatonly in contact with one such an inspection well lid does a cost arise due to broken teethof up to EUR 10,000. The problem, however, is not only related to this cost due todamages of the milling cutter, but also to the fact that large downtime costs arise due toa broken milling cutter, since all other personnel and machinery are then forced to shut down while waiting for repair of the milling cutter.

In addition, the handling itself is expensive and physically demanding with today'smethod. When re-installing asphalt, before the milling cutter is allowed to process adistance, i.e. remove a layer of the existing asphalt top layer, the lid of the inspectionwells must first be lowered, with intent to eliminate the risk of the milling cutter hittingthe inspection well's lid and thereby being destroyed, or at least damage one or moreteeth of the milling cutter. As can be seen above, nevertheless, from time to time, thisimmersion of the lid does not occur well enough and the cutter is frequently damaged ordestroyed.

A lid for an inspection well is heavy, normally about 70 kg, and cannot easily be liftedby machines, which is why the Work is usually done mostly manually. It is thus adifficult and complicated procedure to make height adjustments of the lid at aninspection well. The lid consists of a flat lid part with a downwardly projectingcylindrical centring part. An annular outer portion of the lid part, the surface of which isintended to support the lid against the asphalt, protrudes outside the cylindrical centringpart. In the work of lowering the well lid, the well lid must first be detached fromexisting road pavement and then a removal of asphalt around the well is carried out sothat the lid can be lowered to a desired level, normally about 60 mm below the existingasphalt surface, e. g. a top surface of the existing asphalt surface at which vehicles, pedestrians, bikes and more, travel.

Thereafter, further steps must be taken to make the roadway drivable. According to onemethod (there are more), cold asphalt is applied on top of the inspection well lid suchthat the road surface remains at the same level both on the side and on top of the well.Once the milling has been done, the well lid must then be raised again after removingthe cold asphalt layer. The well lid should then be raised to the milled level, so that theroadway becomes drivable again. Then, when the new asphalt layer is applied, the lidmust be adjusted once more to the final height. It is not uncommon for a level differenceto occur after some time, which means that a further adjustment of the well must becarried out. In total, therefore, many work operations must be carried out, which taketime and require heavy lifting. Thus, adjusting the height of an inspection well is a complex and cumbersome procedure From CNl10616744 and CNl10562893 there are known exemplary installationmethods for a well lid which indicate the need of improvements in the field. Further,from CN209493974 there is known a method for use of a temporary lid arrangementthat is unsatisfactory due to that during use thereof traffic must be routed to avoid driving on the inspection well.

SUMMARY OF THE INVENTION According to one aspect of the present invention, one object of the invention is toprovide a solution, based on use of a temporary well lid arranged during the time ofasphalt coating, which overcomes, or at least mitigates one or more of the disadvantagesor problem mentioned above. This object is achieved with a temporary well lid arrangement according to claim 1.

The preferred method is based on reuse of the existing lid and that the existing inspection well lid is first lifted and moved aside.

Thanks to the invention a user-friendly design is provided which may also provide one or more of the following advantages, e.g.; ease of use, time savings, cost savings, elimination of risk of damaging an asphalt milling cutter,less heavy lifting, and easy manual lifting Without need of motorized lifting devices/equipment.

Further preferred aspects of the invention may be that; said bottom plate is arranged with a, preferably centrally positioned, hole and alower attachment nut arranged at or in said hole, which provides the advantagethat the lid and the bottom plate may easily be connected to each other, said connecting member comprises, such as is in the form of, a rod, havingthreads along at least a lower end portion thereof, which provides a furtheradvantage regarding connecting the lid and the bottom plate to each other, said lower attachment nut is slidably arranged within said hole and that guidingdevices are arranged hindering said lower attachment nut from rotating withinsaid hole, which provides the advantage that the lid and the bottom plate mayflex in relation to each other, the diameter Dl of said lid is larger than the diameter D2 of said bottom plate,wherein preferably Dl is at least 10% larger than D2, more preferred at least20% larger than D2, which provides the advantage that the same deign may beused for inspection wells of various sizes. said securing means means includes a plurality of, to the lower surface of the lidattached radially adjustable, centering members, which provides the advantagethat the same deign may be used for inspection wells of various sizes, said radially movable gripping members are in the fonn of screws movablyarranged within said clamping members within a threaded bore, which providesa cost-effective solution. said securing means includes an upper attachment nut arranged to transfer torqueto apply a clamping force via said connecting member releasably clamping saidlid in contact with the ground, wherein preferably said upper attachment nut is arranged With a unique gripping interface for a unique attachment tool, which provides the advantage that releasing of the upper nut is not easily performed,i.e. requires a special tool.

Further advantages may become apparent from the detailed description below.

BRIEF DESCRIPTION OF THE FIGURESIn the following exemplifying embodiments of the invention will be described more in detail with reference to the enclosed figures, wherein: Fig. 1 shows a vertical cross-sectional view of an inspection well arranged withtemporary lid arrangement according to one embodiment of the invention, Fig. 2 is a top view of a bottom plate according to one embodiment of the invention,Figs. 3 and 4 show different views of a lower attachment nut of a preferred embodimentof the invention, Figs. 5 and 6 show different views of a lid of a preferred embodiment of the invention,Figs. 7 and 8 show different views of an upper attachment nut of a preferredembodiment of the invention, Figs. 9 and 10 show different views of a preferred embodiment of the invention of a toolto tighten the upper attachment nut, Fig. 11 shows a preferred solution according to the invention of a threaded rod, forclamping the lid onto the ground.

Figs. 12 and 13 show different views of a preferred embodiment of lid centeringmembers according to the invention, Figs. 14 and 15 show different views of a preferred embodiment of the invention ofclamping members for attachment of the bottom plate, Figs. 16 and 17 show different parts of a protection arrangement according to apreferred embodiment of the invention, and Fig. 18 is a top view of a support device that according to one embodiment of theinvention, may be used for easy attachment of the bottom plate 1 within the inspection well.

DETAILED DESCRIPTION In Fig. 1 there is schematically shown a cross-sectional side view of an inspection wellhaving cylindric walls 7 positioned on road with an asphalt coating 8, aka groundsurrounding the inspection well, wherein a temporary lid arrangement according to anexemplifying embodiment of the invention has been provided. The temporary lidarrangement comprises a clamping plate/ bottom 1 which, by means of a plurality of radially movable gripping members 24, e. g. screws, in clamping members 2 may be attached at desired level L at substantial distance H below the upper surface of theasphalt coating 8. The distance H is preferably at least 100 mm, preferably between 150to 600 mm. A lid 3 having centering members 300 is clamped against the upper surfaceof the asphalt coating 8 by means of a threaded rod 5. The threaded rod 5 is connectedto the clamping plate/ bottom 1 via a lower attachment nut 9 arranged at the centre ofthe bottom plate l. An upper attachment nut 6A is fixed to an upper end of the threadedrod 5. By means of turning the upper attachment nut 6A the lid 3 may be tightlyclamped against the ground 8 or the lid 3 and threaded rod 5 may be released, i.e.separated from the bottom plate 1. The upper and lower attachment nuts 6A, 9 are upperand lower with respect to each other in a scenario of typical usage of the lidarrangement. The scenario may be that the lid arrangement is installed in an inspectionwell, whose orifice emanates at the asphalt coating 8 that may be substantiallyhorizontal. Furthermore, the rod 5 may preferably project away from the lid 3, e. g.towards a bottom of the inspection well when the lid arrangement is installed in theinspection well. Consequently, the rod 5 may be said to have a distal end and a proximalend, e. g. with respect to the lid 3. Therefore, also the upper attachment nut 6A may bereferred to as the proximal attachment nut 6A, e. g. being located at a proximal portionof the rod 5 including the proximal end of the rod 5, and the lower attachment nut 9 maybe referred to as the distal attachment nut 9, e. g. being located at a distal portion of therod 5 including the distal end of the rod 5.

The lid arrangement facilitates use of a method, wherein the bottom 1 can be fixed at alevel L that provides a large safety margin, from not being hit by the asphalt millingcutter, i.e. teeth of the asphalt milling cutter. The lid 3 may easily and quickly beseparated and lifted away, which further reduces possible risks and heavy/cumbersomehandling. Hence, the novel solution also means that the well lid 3 can be easilyconnected to the bottom plate l in a flexible manner, using the threaded rod 5, so thatthe time-consuming and heavy lifting and adjustments which according to theconventional methods required large efforts, in different stages from start of a re-coatingoperation to final coating, may be eliminated. With the novel method no measuring isneeded, since the lid 3 is relatively thin and arranged with a tapering edge surface 34,such that vehicles may drive onto and over it without need of submerging any part ofthe lid. (as is normally required regarding the original lids). This means that the edgetapers from an inner surface of the lid 3, which faces the bottom plate 1, towards anouter surface of the lid 3, on which traffic may travel. Accordingly, the lid 3 mayconveniently be fixed in a desired position, i.e. in contact with the substrate 8, aka the ground 8, by tightening the upper attachment nut 6A of the threaded rod 5.

Another advantage is that the part, which needs to be lifted when adjusting / removingthe lid 3, in the temporary inspection well is considerably lighter than the regularinspection lid. The reason is that the lid 3 may be fixedly positioned by clamping andnot by gravity as in regard to regular, and typically permanent, inspection lids. Further,instead of a heavy circular centering member, the lid 3 is arranged with separate,relatively light and compact centering elements 300. Thus, it becomes significantlyeasier for staff to handle the assembly and adjustment of an inspection well according to the invention.

Another advantage of the novel solution is that the arrangement may be designed insuch a way that it can be used at a variety of different standards/sizes available forinspection Wells, e. g. having different diameters, i.e, by making the diameter D1 of thelid larger than the diameter D2 of the bottom plate 1. Preferably the diameter D1 is atleast 10% larger than D2, more preferred 1.2 to 2 times the diameter D2 (i.e, diametricextension, if not a circular plate) of the bottom plate 1. Hence,preferab1y the lid 3 has asize to always cover even the largest diameter within a range of frequently occurringwell diameters and the clamping members 2 providing sufficient adjustability with theclamping screws 24 for attachment of the bottom plate 1. Further, the use of adjustablecentering elements 300 and an oversized flexible protective sheet 4, may assist inproviding adaptability, more or less regardless of size. The protective sheet 4 isdescribed in more detail with reference to Figure 16. ln Fig. 2 there is shown from above of a bottom part 1 in accordance with a preferredembodiment of the invention. The bottom part 1 comprises a plate having a circularedge 14. The diameter D2 of the plate 1 is preferably in the range of 400-700 mm.Centrally in the bottom plate 1 there is arranged a hole 11 for positioning of a lowerattachment bolt 9 (see Figs. 3 and 4) The central hole 11 may be arranged with dents 12.The dents 12 form torque-resisting members intended to eliminate the lower attachmentbolt 9 from rotating when inserted into the hole 11 of the bottom plate 1. The bottomplate 1 is arranged with a plurality of first attachment means 10, preferably at leastthree, more preferred four to six, for attachment of clamping members 2. Preferablythese attachment means 10 are in the form of a plurality of through holes 100 enablingattachment of the clamping members 2 to the plate 1. Preferably there is a sufficientlylarge number of holes 100 to facilitate radially adjustable attachment of each clamping member 2.

In Figs. 3 and 4 there are shown different views of a lower attachment nut 9 forattachment of the lower end 52 of the threaded rod 5 (see Fig. 10) in accordance withthe invention. The lower attachment nut 9 may preferably be releasably slidablyattached and positioned within the hole 11 within the bottom plate 1, such that it mayallow some downward movement of the threaded rod 5 in relation to the bottom plate l,e. g. during passage of a heavy vehicle, which enables the lid 3 to flex without transfer tothe bottom plate l. The lower attachment nut 9 comprises a cylindrical body member 95that has an outer surface 90 that fits into the curved portions of the hole ll in the bottomplate 1 and axially extending grooves 92 that are intended to fit with the dents 12protruding within the hole 11 of the bottom plate 1. At a lower end part of theattachment nut 9 there is arranged a cylindrical flange 91 having a larger diameter thanthe diameter of the hole ll in the bottom plate l. Accordingly, the lower attachment nut9 may not pass through the bottom plate l once inserted into the hole ll. Springwashers may be arranged between the flange 91 and the bottom plate l to provide aresilient contact between the lower attachment nut 9 and the bottom plate l, whichenables the lid 3 and rod 5 to flex in relation to the bottom plate l. Furthermore, there isa through hole 96 in the attachment nut 9 which is arranged with threads 94, at leastalong a portion thereof, adapted to interfit with threads of the threaded rod 5. Axiallyalong the threaded portion there may be arranged one or more rinsing grooves 93,intended to provide the ability to rinse the threads of the possibly contaminated rod 5.

In Figs. 5 and 6 there are shown two views of a lid 3 in accordance with the invention.The diameter D1 of the lid 3 is substantially larger than the diameter D2 of the bottomplate 1. The lid 3 is arranged with a central hole 32, for the upper attachment nut 6A atthe top end 50 of the threaded rod 5. Further, the lid 3 is arranged with a plurality ofcentring attachment devices 30, intended for attachment of centring members 300. Inorder to provide for gradual adjustable attachment of the centring members 300 thecentring attachment devices 30 preferably are in the form of radially extending slots.Furthermore, it is shown that the lid is arranged with through holes 31 intended for use in connection with lifting of the lid by means of a lifting tool (not shown).

In the side view it may be seen that the outer circular edge 3 of the lid 3 is arranged witha tapering surface 34. The tapering surface 34 provides a soft transition for a vehiclethat drives on the road 8 and onto and over the lid 3. The lid 3 is preferably made inaluminium which provides a less heavy part to move compared to traditionally used ironlids.

In Figs. 7 and 8 there are shown two views of an upper attachment nut 6A according tothe invention. This upper attachment nut 6A is intended to be used at the top 50 of thethreaded rod 5 (see Fig. 11), or at least partly threaded rod 5, to secure the lid 3 to thebottom plate 1 via the threaded rod 5. Accordingly, the upper attachment nut 6A has acylindrical body 64 with a flange 61 at an upper end. The cylindrical body 64 isarranged with a centrally positioned threaded hole 62. The cylindrical body 64 snuglyfits into the central hole 32 of the lid 3, whereby the flange 61 acts as a stop. Preferablythe threaded hole 62 is a through hole and that a fixation hole 64 is arranged radiallythrough the upper attachment nut 6A. A corresponding hole 53 may be arrangedadjacent the top 50 of the threaded rod 5, whereby a pin (not shown) may be used tofixate the upper attachment nut 6A at a desired position at the top 50 of the threaded rod5. At the top surface of the upper attachment nut 6A there is arranged gripping devices63 which are to be used when rotating the threaded rod 5 via the upper attachment nut6A. It is evident that such gripping devices may present various forms to enable rotationby means of an attachment tool. However, preferably the upper attachment nut 6A isdesigned such that a release of the threaded rod 5 may not be easily performed, withouta specially designed attachment tool 6B (see Figs 9 and 10). Therefore, the flange 61 isrelatively thin and preferably arranged with a tapered surface 65 at the edge, such thattraditional gripping thereof is made difficult. Instead there may be arranged a pluralityof axially extending holes 63 (e. g. three to eight holes 63) arranged in the upper surfaceof the upper attachment nut 6A, which provides a unique gripping interface for anattachment tool 6B. The gripping interface may thus be arranged to receive and,preferably snugly fit with, the attachment tool 6B. The term “unique” is thus here usedto described that the gripping interface has a corresponding attachment tool 6B thatmatches the gripping interface to allow the gripping interface to receive the attachmenttool 6B and form a grip that forces the upper attachment nut 6A to rotate as the attachment tool 6B rotates, with or without use of teeth (not shown) mentioned below.

In Figs, 9 and 10 there are shown two views of a preferred attachment tool 6B used toclamp the lid 3 via the upper attachment nut 9, by means of the threaded rod 5. This tool6B comprises a circular body 66 having a torque transmitting hole 68 in the centre forconnection to a drilling machine or the like. Further, there are a plurality of holes 67 intended for teeth (not shown) to connect the tool 6B with the upper attachment nut 6A.

In Fig. 11 there is shown a threaded rod 5 having a sufficient length to span the distanceH between the bottom plate 1 and the lid 3, i.e. a length larger than that distance H.

Adj acent the upper end 50 there is a hole 53 for fixing of the upper attachment nut 6A.

The lower end 52 is intended for threaded interaction with the lower attachment nut 4.

In Figs. 12 and 13 there are shown centring members 300. The centring members 300are positioned onto the lower surface of the lid to arrange for having the lid 3 centredwithin walls 7 of the inspection hole. Each centring member 300 has a substantiallytriangularly shaped body 304 having an upper surface 301 that is intended to beattached in contact with the lower surface of the lid 3. There are arranged a plurality ofthreaded holes 302 for adjustably fixing of each centring member 300 onto the lowersurface of the lid 3. The position is chosen such that there is desired distance betweenthe walls 7 of the inspection hole and the vertical sides 303 of each centring member300. Accordingly, the plurality of centring members, e. g. three, will arrange for keeping the lid 3 in a centred position within the inspection hole.

In Figs. 14 and 15 there are shown two views of clamping members 2. Each clampingmember 2 has an attachment surface 20 intended to be attached to the upper surface ofthe bottom plate 1, by means of a plurality of threaded holes 21, i.e. used to attach themby means of screws. Each clamping member 2 is arranged with a threaded bore 22, thatextends radially, e. g. with respect to the bottom plate 1. The threaded bore 22 isarranged to receive a screw 24 to facilitate clamping of the bottom plate 1 into a fixedposition within the inspection well, by means of screwing the front end 24A of thescrews 24 into gripping contact with walls 7 of the inspection well. Accordingly, thelength of each screw 24 is preferably larger (e. g. more than 2 times) than the length ofthe clamping member 2, wherein the length of the clamping member 2 preferablycorresponds to the length of the threaded bore 22. A thread rinsing hole 23 may be arranged, preferably in between the two attachment holes 21.

In Figs. 16 and 1 there are shown protection devices 4, 46 used for protecting theinspection hole from having dirt falling into it, past the bottom plate 1, during milling ofthe road surface. The main protection device 4 basically comprise a circular flexiblesheet 40 having a diameter D3 that substantially exceeds the diameter of the inspectionhole. Thanks to having a plurality of radial cuts 44 a limited distance from the outerperiphery, i.e. radially inwards, the edges 45 of the protection device 4 may be fittedinto inspection holes of different sizes. A pivotable protection member 46 with a pivothole 47, as shown in Fig. 17, is used for possibly protecting the centre hole 41 of theprotection device 4 by means of attaching it in a corresponding hole 42 in the protection device 4, such that it may be swung to either cover or uncover the hole 41. Furthermore, there are a pair of holes 43 arranged on opposite sides of the centre of the protectiondevice 4, which holes 43 are intended for gripping devices (not shown), e.g. Strings, to enable lifting of it 4.

In Fig. 18 there is further shown an exemplary support member 6C, as an example ofone of many possible support members, used to position, and during attachment of, thebottom plate l with the clamping members 2 at a desired level L within the inspectionhole. The support member 6C comprises a hub 69 with a central hole 691 and a pluralityof radially extending anns 692 that span the width of the inspection hole, such that theupper attachment nut 6A may rest on the hub 69 with the threaded rod 5 extendingdownwardly therethrough. Then the bottom plate may be threaded onto the threaded rod5 to threadedly adjust the position of the bottom plate l thereon, whereby subsequentlythe bottom plate l may be lowered into the inspection hole and having it supported bythe support member 6C, where after fixation of the bottom plate may easily be achievedwithin the inspection hole, thanks to sufficient space being provided for stretching down with a tool/machine for attachment by means of the clamping members 2.

Thanks to the lid arrangement according to embodiments of the invention numerousadvantages may be achieved. As is evident for the skilled person there exist a variety ofmodifications of different aspects of the above the described embodiment to provide thedesired functionality. Hence, the invention rnay be :modified in rnany Ways in relation towhat is shown in the figures *without tleparting 'from the basic concept of the invention.lïor instanee, it is frufeseen that. hotttirnts l of clitfftëifentt, sitztfs as Well as líds 3 rnay beprovided. liurther, it is evident that the lid arrangement according to the invention mustnot be temporary but nray be used as a permanent solutiori. Further, it is evident that themovable gripping members 24 may be in other forms than screws, e. g. radially movablerods that are driven by means of a common linkage, which in turn may be driven by acommon transmission, which transmission may be powered by its own motor, by adrilling machine or manually by hand. Moreover, it is foreseen that various solutionsmay be provided to provide a connecting member, between the bottom l and the lid 3,e. g. a flexible wire or a rod. Further it is foreseen that the lower attachment nut 9 mustnot be arranged slidably, but may be fixed (e.g. by welding) to the bottom plate l, andthat flexibility between the lid and bottom plate may be arranged for in differentmanners, e. g. by use of a telescopic rod or by use of a flexible wire. Moreover, it isevident that various inter fitting guiding devices 12, 92 may be used to enable sliding ofand simultaneously hinder rotation of the attachment lower in the hole ll of the bottom plate l. 11 Further, it is evident that the upper attachment nut may form an integrated part of the threaded rod, e. g. a nut Welded to the rod. flash eniifiocíi.n;ren_t, afxanrpíe, or feature diseioseri heroin rnay be cornhimzcí ufíth one or rnore o ther ernbofiirrxznts, exampies or featurea tiisclffiseci herein.

Claims (12)

1. A lid arrangement (L), preferably for temporaly use in connection With renewal ofan asphalt top layer, wherein said lid arrangement is arranged to cover a hole of aninspection Well (7), said lid arrangement (L) comprising a lid (3) at the top of thehole of the inspection well (7), securing means (1, 2, 5, 6A, 9, 300) comprising abottom plate (1) and a connecting member (5) arranged to anchor the lid (3) to saidbottom plate (1), wherein said bottom plate (1) is arranged with a plurality ofclamping members (2) including radially movable gripping members (24) havinggripping ends (24A) arranged to grip at, preferably into, the wall (70) of theinspection well, wherein said gripping ends (24A) are arranged to be movable pastthe outer edge (14) of said bottom plate (1) and that the diameter (Dl) of said lid (3)is larger than the diameter (D2) of said bottom plate (1), c h a r a c t e r i z e d in thatsaid lid (3) and said securing means (1, 2, 5, 6A, 9, 300) are arranged to securelyposition said lid (3) to cover on top of the hole of the inspection well (7) by having asize larger than the diameter of the inspection well (7) and in that said connectingmember (5) is in the form of a rod, having threads along at least a lower end portion(52) thereof. A lid arrangement according to claim 1, ch ar a c t e ri z e d in that said rod (5) hasthreads at least along each end portion (50, 52). A lid arrangement according to claim 1 or 2, c h a r a c te r i z e d in that said bottomplate (1) is arranged with a, preferably centrally positioned, hole (11) and a lower attachment nut (9) arranged at or in said hole (11). A lid arrangement according to claims 3, c h a r a c te ri z e d in that said lowerattachment nut (9) is slidably arranged within said hole (11) and that guidingdevices (12, 92) are arranged to hinder said lower attachment nut (9) from rotatingwithin said hole (11). A lid arrangement according to any of claims 1-4, c h ar a c t er i z e d in that thediameter (Dl) of said lid (3) is at least 10% larger than D2, more preferred at least20% larger than D2, A lid arrangement according to any of claims 1 - 5, c h a r a c te ri z e d in that saidsecuring means means (1, 2, 5, 6A, 9, 300) includes a plurality of, to the lower surface of the lid (3) attached, radially adjustable centering members (300). 7. 10. 11. 13 A lid arrangement according to any of claims 1 to 6, c h ara c ter i z e d in that saidradially movable gripping members (24) are in the form of screws movably arranged within said clamping members (2) within a threaded bore (22). A lid arrangement according to any of claims 1-7, c h ar a c t er i z e d in that saidsecuring means (1, 2, 5, 6A, 9, 300) includes an upper attachment nut (6A) arrangedto transfer torque to apply a clamping force via said connecting member (5)releasably clamping said lid (3) in contact with the ground (8), wherein preferablysaid upper attachment nut (6A) is arranged with a unique gripping interface (63) for a unique attachment tool (6B). A method for use of a lid arrangement according to any of claims 1-8, for use inconnection with renewal of an asphalt top layer, wherein said lid arrangement isarranged to cover a hole of an inspection well (7), comprising the steps of: a) removing the original lid arrangement from an inspection Well positioned on aroad with an asphalt coating (8) thereby uncovering the inner walls (70) of theinspection well (7), b) positioning the bottom plate (1) with a plurality of clamping members (2) withinthe inspection hole at a distance (H) below the top surface of asphalt coating (8), andpreferably also positioning a protection device (4, 46) on top of the bottom plate (1),c) attaching the bottom plate (1) by means of radially moving gripping members(24) of said clamping members (2) into gripping contact with the walls (70) of saidinspection hole (7), d) positioning of the lid (3) on top of the inspection hole and connecting theconnecting member (5) between the lid (3) and the bottom plate (1), e) transferring a clamping force via said connecting member (5) to releasably clampsaid lid (3) in contact With the ground (8), whereby the road may be allowed fortraffic. A method according to claim 9, charac terized by, f) removing the lid (3) and allowing an asphalt milling cutter to remove the top layerof the asphalt coating around the inspection hole, and, g) subsequently again attach the lid (3) on top of the inspection hole, whereby theroad may again be allowed for traffic. A method according to claims 10, characterized by, 1

2. 14 h) removing the lid (3) for putting a new layer of asphalt onto the road,i) subsequently either again attach the lid (3) or remove the bottom plate (1) and reintroduce the original lid arrangement. A method according to claim 9, Wherein a support member (6C) is used inconnection With step b) When attaching the bottom plate (1) to the Walls (70) of saidinspection Well (7), Wherein said support member (6C) comprises anns (692)providing space to reach into the hole of the inspection Well and that is connected tothe bottom plate (1) by means of said connecting member (5) and Wherein thesupport member (6C) spans over the hole of the inspections Well (7) such that thebottom plate (1) may be supported at a desired level (L) Within the hole of theinspection Well (7) prior to attachment of the bottom plate (l) to the Walls (70) ofthe inspection Well (7).