WO2012126025A1 - Dispositif pour réaliser un joint de dilatation - Google Patents

Dispositif pour réaliser un joint de dilatation Download PDF

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Publication number
WO2012126025A1
WO2012126025A1 PCT/AT2012/000067 AT2012000067W WO2012126025A1 WO 2012126025 A1 WO2012126025 A1 WO 2012126025A1 AT 2012000067 W AT2012000067 W AT 2012000067W WO 2012126025 A1 WO2012126025 A1 WO 2012126025A1
Authority
WO
WIPO (PCT)
Prior art keywords
profile
expansion
expansion element
region
rising
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AT2012/000067
Other languages
German (de)
English (en)
Inventor
Georg Michael Wolff
Gustav Gallai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reisner & Wolff Engineering GmbH
Original Assignee
Reisner & Wolff Engineering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reisner & Wolff Engineering GmbH filed Critical Reisner & Wolff Engineering GmbH
Publication of WO2012126025A1 publication Critical patent/WO2012126025A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/06—Arrangement, construction or bridging of expansion joints

Definitions

  • the invention relates to a device for bridging an expansion joint in a carriageway, in particular in the transition region to bridges, comprising a mat-shaped intermediate profile with an expansion element, wherein the intermediate profile has a bottom surface.
  • the joint gap is bridged by freely protruding fingers of two finger plates, wherein the fingers are arranged interlocking.
  • the finger elements are bolted to a cast-in steel substructure.
  • the total joint gap is divided into several single joint gaps by (steel) profiles (slats) running transversely to the road surface.
  • These single-joint gaps are sealed against water and dirt by sealing profiles made of elastomer, which are tied into the lamellae.
  • the slats are slidably mounted on trusses.
  • RollverInstitutdehnfugen form plates that slide on a trestle.
  • mat transitions the mats can be offset with composite anchors directly to a concrete bed, the mats are attached to the composite anchors.
  • the hollow channels and optionally a surface profiling have, whereby the mat better absorb strains and compressions.
  • a design with a so-called expansion element which has a V-shaped cross section. About this expansion element of the expansion path or the compression path of the mat transition is increased.
  • the expansion element has a sequence of rising and falling regions with respect to the bottom surface, wherein more than one rising and / or more than one sloping region is arranged.
  • this expansion element may be pinched at high pressure exerted by the bridge and ultimately can be sheared off. Due to the lower height of the expansion element according to the invention this problem is better taken into account.
  • the expansion element in the direction of a longitudinal center axis through the intermediate profile at least partially has a W-shaped cross-section.
  • the layer thickness i. The height of the intermediate profile are increasingly reduced, however, this reduction are limited insofar as the intermediate layer should have a certain strength or mechanical strength per se, and therefore falling below a certain layer thickness is not useful.
  • the wall thickness of the expansion element in the region of the rising and falling areas is between 10% and 30% of the height of the intermediate profile.
  • This selection of the wall thickness of the expansion element is particularly advantageous if the mat-shaped intermediate profile already has elastic properties per se, since thus the expansion element can be given a relatively high strength, but the overall deformability of the intermediate mat is not thereby adversely affected.
  • the expansion element has a wave-shaped course. In addition, the ride comfort during the crossing can be improved.
  • Figure 1 is an expansion joint cut in front view with a built intermediate profile for bridging the expansion joint.
  • Figure 2 is a profile piece of the intermediate profile in side view.
  • FIG. 3 shows the profile piece according to FIG. 2 in plan view
  • FIG. 4 shows a detail of a first front end region of the profile piece according to FIG. 2;
  • FIG. 5 shows a detail of a second front end region of the profile piece according to FIG. 2;
  • FIG. 6 shows a detail of a cross section through the profile piece according to Fig. 2.
  • FIG. 7 shows a first embodiment variant of an expansion element in cross section
  • Fig. 8 shows another embodiment of an expansion element in cross section.
  • Fig. 1 the installation situation of a device 1 for bridging an expansion joint 2 in this expansion joint 2 is shown.
  • the expansion joint 2 is formed between two roadway sections 3, 4, in particular in the transition region from a roadway to a bridge.
  • the device 1 is also suitable for other bridging of expansion joints 2 in road traffic, for example for expansion joints 2 in the course of sidewalks or in the area of Schrammborden.
  • the two roadway sections 3, 4 have the usual structure for this purpose.
  • the device 1 comprises or consists of a mat-shaped intermediate profile 5, preferably at least one metal insert 6, in the illustrated embodiment, two metal inserts 6 are provided.
  • the intermediate profile 5 consists in particular of a rubber, preferably EPDM, whereby other types of rubber come into question, which have the desired mechanical characteristics. But there are also combinations of materials, especially with plastics, usable.
  • the at least one metal insert 6 is preferably made of a steel, but may also consist of other metals or metal alloys.
  • This metal insert 6 is used, inter alia, the mechanical connection or anchoring of the intermediate section 5 to the road substructure or provided in the expansion joint 2 bearing elements 7, 8, in particular so-called concrete beds or concrete blocks or bars, the left and right, leaving an intermediate gap. 9 be arranged or formed in the expansion joint, if the pull-out strength of the intermediate profile 5 for a screw connection or composite anchor 10, 11 is not sufficient.
  • the metal insert 6 can also exert a reinforcing function in the intermediate profile 5.
  • the metal insert 6 is formed by an angle profile strip 12, 13 with at least approximately right angle, the angled portion 14, 15 in one Edge region 16, 17 which is at least approximately parallel to a longitudinal end face 18, 19 of the intermediate profile 5 (Fig. 3), is arranged. Furthermore, the metal insert 6 has at least one opening for the passage of the composite anchors 10, 11. As already mentioned, the metal insert 6 is preferably embedded in the intermediate profile 5.
  • this intermediate profile can be produced by press vulcanization of a rubber in a mold, wherein in advance the metal insert 6 is inserted into the mold, so that it is enclosed by the rubber.
  • the embedding of the metal insert 6 in the intermediate profile 5 by a ander simplifies method, realize.
  • the metal insert 6 on the outside of the intermediate profile 5, for example by screwing or by molding, wherein in addition 6 recesses or openings can be provided in the metal insert, which are at least partially penetrated by the rubber of the intermediate profile 5 or in the the rubber of the intermediate profile 5 at least partially penetrates.
  • the metal insert 6 is at a small distance from a bottom surface 20 of the intermediate profile 5, which faces in the direction of the support elements 7, 8, arranged therein.
  • this distance may be between 5% and 30% of a height 21 (FIG. 21) of the intermediate profile 5 in the direction perpendicular from above onto the expansion joint 2 (viewed in the installation position of the intermediate profile 2).
  • the metal insert 6 it is also possible to design the metal insert 6 differently, for example as a flat profiled strip, as round rods, as fibers, in particular metal fibers, etc., but angled embodiments have a better pull-out strength from the intermediate profile 5 in comparison to a flat material.
  • the support elements 7, 8 are, as already mentioned, preferably made of a, in particular reinforced, concrete.
  • the support elements 7, 8 are in the expansion joint 2 so situated that a road surface 22, 23 is partially disposed thereon.
  • the support elements 7, 8 may be executed stepped on the side facing away from the expansion joint 2, in order to achieve an at least approximately level-level connection to the device 1 and the expansion joint 2.
  • the intermediate profile 2 may consist of one or more, in particular mat-shaped, profile elements over the entire length, which corresponds at least approximately to the length of the expansion joint 2.
  • a possible profile piece 24 for the division of the intermediate profile 5 onto a plurality of profile elements is shown in FIGS. 2 to 7 in various views or sections.
  • the profile piece 24 may be made planar. It preferably has one
  • a width 26 of the profile piece 24 may correspond at least approximately to the width of the expansion joint 2 (FIG. 1) between the two roadway sections 3, 4 (FIG. 1), it being by at least approximately meant that, as shown in FIG , a connection region 27 between the intermediate profile 5 and the respective road surface 22, 23 may be filled with a conventional potting compound 28.
  • a connection region 27 between the intermediate profile 5 and the respective road surface 22, 23 may be filled with a conventional potting compound 28.
  • each two adjacent profile pieces 24 is preferably designed as a shock lock.
  • a clip element 30 and / or an adhesive element 31 can be provided in the joint regions between in each case two adjoining profile pieces 24 on end faces 28, 29 opposite each other in the direction of the length 25 of the profile pieces 24.
  • a mechanical locking and, via the adhesive element 31 a "chemical lock” is achieved by gluing the two profile pieces 24.
  • a preferred clip element 30 comprises a first or consists of a first profile element 32 (female profile) and a second / a second profile element 33 (male profile), the first profile element 32 having a recess 34 and the second profile element 33 having a profile section 35 Having the cross section of the recess 34 corresponding cross section.
  • the recess 34 of the first profile element 33 so the female profile, have a cylindrical cross-section.
  • the profile section 35 of the second profile element 33 ie the male profile, is accordingly also provided with a cylindrical cross-section, so that the male profile can be received by the female profile and thus the mechanical locking of the impact area is produced.
  • the male profile can in principle be used in the profile section 35. be formed at least approximately rod-shaped.
  • the two profile elements 32, 33 have the same cross section, as shown in FIGS. 4 and 5.
  • the detail of FIG. 4 shows the male profile.
  • this "hollow cylinder” can assume the function of the male profile on a lower side 36 on the one hand and the femoral profile on the other on an upper side 37.
  • the profile element 33 (male profile) of a first profile piece is used to produce the mechanical locking 24 is pressed into the profiled element 32 (female profile) of a second profiled piece 24 adjoining thereto
  • the two profiled pieces 24 can be placed on blocks and pressed together with a shock-locking device, for example in the form of a pair of pliers having the contour of the profiled elements 32, 33 ,
  • the recess 34 is flanked on the right and / or left by side surfaces 38, 39, as shown in FIGS. 4 or 5.
  • a width of the side surfaces 38, 39 in the direction of a longitudinal central axis 40 may be, for example, up to a maximum of 5 cm.
  • the slot defined by the recess 34 for insertion of the male profile of the profile element (s) 32, 33 preferably has a width 41 in the direction of the longitudinal central axis 40, which is smaller than a maximum diameter 42 of the recess 34 Strength of the mechanical locking achieved because the male profile, whose diameter substantially corresponds to the maximum diameter 42 of the female profile, must be pressed through this slot. It is advantageous if the material strength of the impact lock in this area is at most 30%, in particular between 5% and 20%, of the height 21 of the profile piece 24, around the bending of the female profile in the region of this slot during the insertion of the male profile to facilitate, but this wall thickness should not be too low in view of the strength of the lock.
  • the profile elements 32, 33 may be arranged on the profile pieces 24 such that the profile element 32 (female profile) reaching below or from below to an imaginary center plane 43 through the profile piece 24 (in the direction of a lower support surface 44th viewed from) on the left in Fig. 3 end face 28 and the second profile element 33 (male profile) above or from above to the imaginary center plane 43 through the profile piece 24 reaching the right in Fig. 3 end face 29 are arranged.
  • This embodiment of the clip elements 30 has the advantage that all profile pieces 24 may have the same shape, so that not several different moldings, ie profile pieces 24, must be made.
  • profile pieces 24 have only male profiles or female profiles and the respective corresponding female profiles or male profiles are arranged on a separate profile piece forming a type of clip.
  • This clip may also consist of a different material to the material of the profile pieces 24, for example a metal, especially steel.
  • profile pieces 24 have the same shape, it is possible that e.g. the two end pieces of the intermediate profile 5, which are only connected to a further profile piece 24, only at one of the two end faces 28, 29 are formed with the respective profile element 32 or 33.
  • the impact lock may alternatively or in addition to the clamping element 30, the adhesive element 31 have.
  • the adhesive element 31 comprises or consists of two profile elements 45, 46, wherein the first profile element 45 is arranged on each of two adjoining profile pieces 24, and the second profile element 46 on the second profile piece 24 of the two adjoining profile pieces 24, so that the two profile elements 45th , 46 at the two interconnected profile pieces 45 are arranged one above the other.
  • this means that the first profile element 45 is arranged in the lower part of the impact lock with respect to the center plane 43, for example on the right end side 29 in FIG.
  • the two profile elements 45, 46 may each have the shape of a half-shell, so that they define a hollow cylinder in the connected state of two profile pieces 24.
  • these two profile elements 45, 46 may have a different cross-sectional shape, for example, oval, triangular, quadrangular, pentagonal, hexagonal, etc., executed, but in any case the two profile elements 45, 46 in the finished shock lock a cavity or a Define recess, as in the half-shell-shaped design.
  • This cavity or this recess serves to receive an adhesive, which is applied to the formation of the adhesive bond on the lower part of the two profile elements 45, 46, that is, for example, on the profile element 45 of FIG. 5.
  • This adhesive is applied over the entire width 26 of the profile piece 24 sufficiently, for example wurstför- mig, applied. During the subsequent mechanical compression of the impact lock, excess adhesive is pressed out over the two open sides of the adhesive element 31.
  • any commercially available adhesive can be used, but preferably with regard to the elastic properties of the profile piece 24, an adhesive with elastic properties is used.
  • the adhesive element it is also possible in the embodiment of the adhesive element that only the first profile element 45 or the second profile element 46 is disposed on the two end faces 28, 29 of the profile pieces 24, and that the respective further profile element 46 or 45 formed by a separate component is, for example, has two juxtaposed half-shells, which are curved in the same direction.
  • the impact lock composed of the clamp element 30 and / or adhesive element 31 can have a length which corresponds to a maximum of 10%, in particular a maximum of 5%, of the length 25 of a profile piece 24.
  • more than one clamp member 30 and / or more than one adhesive member 31 are arranged to form the butt lock on the end faces 28, 29 of the profile pieces 24, for example, two, three, four, etc., wherein the plurality of clip elements 30 and / or adhesive elements 31 may each be arranged side by side or is also an alternating arrangement of the clip elements 30 and adhesive elements 31 possible. It is also possible for a number of adhesive elements 31 different in number to the number of clamping elements 30 to be provided.
  • both the clamp element 30 and / or the adhesive element 31 can be designed at least partially as separate components or profile elements of the intermediate profile 5.
  • the clip elements 30 and / or the adhesive elements 31 or their respective components are each formed integrally with the respective profile pieces 24. If several profile pieces are provided for the intermediate profile, they can also be connected differently, for example via a tongue and groove connection, or by the area of the end faces 28, 29 are executed only with half the material thickness and the two adjoining profile pieces then overlapping each other surface be connected to each other.
  • the intermediate profile 5 has an expansion element 47.
  • This expansion element 47 serves to increase the expansion area or compression area of the already elastically executed intermediate profile 5.
  • the expansion element 47 may be an integral part of the intermediate profile 5.
  • the expansion element 47 may for example be made of a metal, in particular steel, and have already been connected to it during the production of the profile pieces 24 for the intermediate profile 5, for example by scorching. It is also conceivable that the expansion element 47 is connected by a different connection method with the profile piece 24, for example with screws or by gluing. On the other hand, it is possible that the expansion element 47 is made of the material of the intermediate profile 5, in particular is made in one piece with these.
  • the expansion element 47 preferably has a W-shaped cross-section viewed in the direction of the longitudinal central axis 40.
  • the expansion element 47 extends in the direction of the longitudinal center axis 40 over the entire length of the intermediate profile. 5
  • the expansion element 47 is centered - viewed in plan view - arranged in the intermediate profile 5, in particular symmetrically with respect to the longitudinal center axis 40 (viewed in the direction of the longitudinal central axis 40). But it is also possible that the expansion element 47 is arranged offset in the direction of one of the two longitudinal end faces 18, 19 of the intermediate profile 5 from the center out.
  • the expansion element 47 preferably has, as can be seen in particular from FIG. 3, a wavy course in the direction of the longitudinal center axis 40 in plan view of the profile piece 24. But there are also gradients in this direction possible, for example, straight-line.
  • the expansion element 47 has a wall thickness 48 which is between 10% and 30%, in particular between 14% and 20%, of the height 21 of the intermediate profile 5.
  • the impact lock can follow the course of the expansion element 47, as can be seen in particular from FIG. In the lower portion of FIG. 6, the front end region of the further profile piece 24 adjoining the profile piece 24 is shown by dashed lines.
  • the impact lock ie in particular the clamp member 30 and / or the adhesive member 31, starting from the left longitudinal end face 18 a flat, ie in the installed position of the profile piece 24 usually horizontal, first region 49 which is approximately at the level of the center plane 43 (Fig. 2), and to which a rising second region 50 connects.
  • a planar third region 51 which is usually horizontal in the installed position, follows, but in contrast to the first, planar region, now extends approximately at the level of an upper surface 52 of the profile piece 24.
  • the adjoining the third region 51 fourth region 53 is sloping and extends into from the upper surface 52 to approximately the bottom surface 20.
  • a fifth rising region 54 adjoins this fourth region 53, which also extends over at least approximately the entire height 21 like the fourth region 53 of the profile piece 24 extends.
  • the contour of the expansion element 47 is simulated by the impact lock, wherein the first rise, ie the second region 50, is located just in front of the expansion element 47 or, accordingly, the last sloping region in the described sequence just after the expansion element 47.
  • a short is meant in particular a distance between 20 cm and 40 cm from the expansion element 47 at a width 26 of the profile piece of about 270 cm.
  • the expansion element 47 can also have other cross-sectional shapes, for example accordion-shaped, as shown in FIG. 8.
  • the expander 47 has a sequence of rising portions 55 with respect to the bottom surface 20, ie rising flanks, and sloping portions 56, ie falling flanks, having more than one rising and / or more than one sloping portion 55,56 is.
  • sloping By the term “rising” or “sloping” is meant that following the course of the expansion element 47 in the direction of the width 26 of the intermediate profile 2, ie in the direction of stretching or compression of the expansion element 47, starting from one of the two longitudinal end faces 18, 19, the expansion element 47, for example, a sloping portion 56 which extends from the surface 52 of the intermediate profile 5 in the direction of the bottom surface 20, then followed by a rising portion 55 extending from the bottom surface 20 in the direction of the surface 52nd extends, this area again followed by a sloping area extending from the surface 52 in the direction of the bottom surface 20, and so on, as shown in Fig. 8.
  • the expansion element 47 has a sequence of regions 55, 56 or flanks which are inclined on the one hand against the bottom surface 20 and on the other hand in each case two successive regions 55, 56 against each other, ie in particular opposite.
  • the regions 55, 56 can be arranged directly next to one another or there is the possibility that at least between individual regions 55, 56 a planar intermediate region, which is usually horizontal in the installation position, is arranged.
  • a planar region may follow, followed by an ascending and descending region 55, 56 again, etc.
  • An angle 57 or 58 which an ascending and descending region 55, 57 enclose with one another is preferably selected from a region with a lower limit of 30 ° and an upper limit of 65 °, in particular a region with a lower limit of 45 ° and an upper limit of 50 °.
  • the two angles 57, 58 are the same size, but there is also the possibility that they have a different value. Transitions between the individual regions 55, 56 are preferably made rounded, as can be seen from FIGS. 7 and 8.
  • expansion element 47 has a straight and / or an odd number of rising and falling areas 55, 56
  • one or more apertures 59 may be formed in the intermediate profile 5, preferably in the vicinity of, i.e., in the vicinity of, e.g. closely spaced from the longitudinal end faces 18, 19 are situated. Via these openings 59 it is possible to anchor the intermediate profile 5 or the profile pieces 24 in the support elements 7, 8, for example by means of a composite anchor. Preferably, these apertures 59 are formed as elongated holes with a longitudinal extent in the direction of the longitudinal center axis 40. A preferred cross-sectional shape of these apertures 59 is shown in FIG. 6.
  • the embodiments show possible embodiments of the device 1 for bridging an expansion joint 2 in a roadway, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention concerne un dispositif (1) pour réaliser un joint de dilatation (2) dans une chaussée, en particulier dans la zone de transition avec un pont. Ce dispositif comprend un profilé intermédiaire (5) en forme de mat comportant un élément expansible (47), le profilé intermédiaire (5) présentant une surface de base (20). Selon l'invention, l'élément expansible (47) présente une succession de zones qui montent et qui descendent par rapport à la surface de base (20), plus d'une zone montante et/ou plus d'une zone descendante étant présentes.
PCT/AT2012/000067 2011-03-18 2012-03-19 Dispositif pour réaliser un joint de dilatation Ceased WO2012126025A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM158/2011 2011-03-18
ATGM158/2011U AT12475U1 (de) 2011-03-18 2011-03-18 Vorrichtung zur überbrückung einer dehnungsfuge

Publications (1)

Publication Number Publication Date
WO2012126025A1 true WO2012126025A1 (fr) 2012-09-27

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Application Number Title Priority Date Filing Date
PCT/AT2012/000067 Ceased WO2012126025A1 (fr) 2011-03-18 2012-03-19 Dispositif pour réaliser un joint de dilatation

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AT (1) AT12475U1 (fr)
WO (1) WO2012126025A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104562928A (zh) * 2015-01-22 2015-04-29 宁波路宝科技实业集团有限公司 一种防陷型桥梁伸缩装置
CN114016543A (zh) * 2021-12-22 2022-02-08 北京城建集团有限责任公司 一种跨结构伸缩缝的设备基础施工节点及施工方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113882214A (zh) * 2021-09-17 2022-01-04 中冶南方城市建设工程技术有限公司 一种波形防错台防老化连续配筋混凝土路面用伸缩装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116665A5 (fr) * 1970-12-02 1972-07-21 Ceintrey M
GB1510622A (en) * 1975-07-30 1978-05-10 Tippett S Expansion joints for roadways
DE8816535U1 (de) * 1988-03-26 1989-12-28 Kober Ag, Glarus Fugenabdeckung für Dehnfugen in Verkehrswegen
DE202006004120U1 (de) * 2006-03-16 2006-06-14 Buchberger Gmbh Vorrichtung zum Überbrücken einer Bewegungsfuge in einem Bauwerksboden

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850539A (en) * 1972-06-05 1974-11-26 Watson Bowman Associates Gap-sealing device
GB1419420A (en) * 1973-07-05 1975-12-31 Arai M Expansion joint and method of installing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116665A5 (fr) * 1970-12-02 1972-07-21 Ceintrey M
GB1510622A (en) * 1975-07-30 1978-05-10 Tippett S Expansion joints for roadways
DE8816535U1 (de) * 1988-03-26 1989-12-28 Kober Ag, Glarus Fugenabdeckung für Dehnfugen in Verkehrswegen
DE202006004120U1 (de) * 2006-03-16 2006-06-14 Buchberger Gmbh Vorrichtung zum Überbrücken einer Bewegungsfuge in einem Bauwerksboden

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104562928A (zh) * 2015-01-22 2015-04-29 宁波路宝科技实业集团有限公司 一种防陷型桥梁伸缩装置
CN114016543A (zh) * 2021-12-22 2022-02-08 北京城建集团有限责任公司 一种跨结构伸缩缝的设备基础施工节点及施工方法

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