CN210766909U - High anti erosion thin wall prefab - Google Patents

Abstract

The utility model relates to a building technical field especially relates to the maritime work field, discloses a high anti erosion thin wall prefab, the prefab includes relative template face and pours the face and around the template face and pour face side all around, the template face is equipped with the blind hole that is used for connecting lifting device, pours the face and is equipped with the through-hole that link up the template face, and the side is equipped with the tongue-and-groove, and is different the prefab can pass through the tongue-and-groove butt joint is passed through the through-hole is to drawing the connection and the continuous piece/cyclization of four directions/one-tenth section of. The structure is used for the periphery of concrete constructed by maritime workers to form a thin-wall protection structure, prefabricated members are connected in a tongue-and-groove mode, modified sealing coiled materials can be added between the tongues, gaps are structurally sealed by high-durability low-shrinkage inorganic high-strength gap fillers, the structure has the performances of scouring resistance and seawater corrosion resistance, and meanwhile has good tensile strength, the cracking tensile force of temperature or shrinkage and the like can be overcome, and the surface can be ensured not to generate permeating cracks or channels.

Description

High anti erosion thin wall prefab

Technical Field

The utility model relates to a building technical field especially relates to the maritime work field, more specifically, a high anti erosion thin wall prefab.

Background

With the development of marine resources, the construction of marine foundation engineering is more and more seriously corroded by seawater, sea wind, sea fog and other media in the sea, the construction facilities of major engineering are continuously and severely corroded by the severe marine environment, so that huge corrosion damage and economic loss are caused, the direct loss of marine corrosion in China is over 2.14 trillion in 2014, and the concentrated parts are mainly engineering structures in tidal areas and splash areas, so that the quality of marine engineering construction engineering is improved, the anti-corrosion capability of marine environmental engineering is improved, and great significance is brought to the improvement of marine economy and safety.

The traditional method for prolonging the service life of the marine concrete structure mainly adopts marine concrete materials to add materials so as to improve salt corrosion resistance, and increases the distance from a reinforcing steel bar to the surface of the concrete so as to prolong the time of salt invading the surface of the reinforcing steel bar in the concrete, and the fact that the larger the structural reinforcing steel bar protective layer is, the higher the structural reinforcement quantity required by the same bearing capacity is, the more early cracking is easy to occur, and the formation of a structural corrosion channel is accelerated, so that the method is a passive protection mode and has high cost, so that a severe corrosion site still exists in the current application, meanwhile, the marine concrete structure still has more pores, marine corrosion is dynamic corrosion, marine water flow scouring and salt permeation under dry-wet alternation are intensified, and the structural peeling damage can be continuously caused, therefore, the mode only can delay corrosion and cannot fundamentally solve the corrosion of marine engineering.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an economical and reasonable thin-walled preform with erosion resistance, corrosion resistance, cracking resistance, long service life,

in order to solve the technical problem, the utility model adopts the following technical scheme:

the prefabricated member comprises a template surface, a pouring surface and side surfaces surrounding the template surface and the pouring surface, wherein the template surface is provided with blind holes used for being connected with hoisting equipment, the pouring surface is provided with through holes penetrating through the template surface, the side surfaces are provided with tongue-and-groove openings, and different prefabricated members can be butted through the tongue-and-groove openings and are connected in a split mode through the through holes to form a sheet, a ring and a tube continuously in four directions.

The utility model discloses under the prerequisite that keeps the thin-walled structure of prefab, butt joint through the tongue-and-groove and the split of through-hole make can inseparable connection together form together between the prefab and can enclose and locate marine structure outlying thin wall protection architecture, can increase modified sealing coiled material in the middle of the tongue-and-groove, this structure has antiscour and anti sea water erosion resistance, good tensile strength has simultaneously, can overcome fracture pulling forces such as temperature or shrink, ensure that the surface can not produce infiltration crackle or passageway, improve the life of prefab. During construction, the support frame of the hoisting equipment is connected with the blind holes of the prefabricated members by stainless steel bolts, after the prefabricated members are hoisted in place, the different prefabricated member through holes are connected by diagonal bolts to enable the different prefabricated members to be fixedly connected with each other, and finally concrete is poured in a space surrounded by pouring surfaces of all the prefabricated members. When the prefabricated member is detached or transported, the prefabricated member is hoisted by adopting the hoisting ring connected to the blind hole, and the nut corresponding to the hoisting ring is reserved in the steel reinforcement framework before the template is poured.

The tongue-and-groove is formed by steps formed on the side surfaces, the steps on the opposite sides have different widths, and gaps for filling joint mixture are formed on one side of the formwork surface or the pouring surface when different prefabricated parts are butted. The arrangement of the gaps can be better matched between the grooves and the tongues, so that the butt joint tightness is improved; the gap can be structurally sealed by adopting a high-durability low-shrinkage inorganic high-strength gap filler, so that the scouring resistance, seawater erosion resistance and tensile strength of the prefabricated part are further improved, cracking tension such as temperature or shrinkage is further overcome, and the surface is further ensured not to generate permeating cracks or channels. The gaps with certain width can better fit the tongue-and-groove, and the prefabricated parts can be more flexibly connected; however, the gap width is preferably 1 to 20mm because the strength of the butt joint may be reduced and the sealing performance may be impaired to various degrees due to an excessively large gap width. The sum of the thicknesses H of the steps on the opposite sides is smaller than the whole thickness of the prefabricated parts, a crack parallel to the template surface is formed between the prefabricated parts when the different prefabricated parts are butted, and the crack can be filled with the modified sealing coiled material, so that the surface is ensured not to generate infiltration cracks or channels.

The prefabricated member comprises a substrate layer and a rib layer which is overlapped on one surface of the substrate layer and consists of reinforcing ribs, the pouring surface is formed by one surface of the substrate layer and the surface of the rib layer, the template surface is formed by the other surface of the substrate layer, and the projections of the blind holes and the through holes on the template surface are positioned in the projections of the rib layer on the template surface. The rib layer that constitutes by the stiffening rib has improved the intensity of prefab, and more importantly, outstanding can the associativity better between the rib layer of stratum basale and the concrete of pouring, can effectively protect the inside concrete of ocean engineering not receive the sea water erosion, still helps reducing the whole thickness of prefab, wholly can reduce ocean engineering and synthesize the cost, promotes ocean engineering life, is fit for using widely.

The rib layer is of a fence type structure and comprises a square frame rib and a plurality of parallel linear ribs arranged in the frame rib, the side face of the frame rib and the side face of the basal layer jointly form the side face of the prefabricated part, and the tongue-and-groove is formed in the side faces of the frame rib and the basal layer. The fence type rib layer helps to promote the combination between the prefabricated member pouring surface and the poured concrete, and on the other hand, the prefabricated member can be prevented from forming pouring dead angles on the pouring surface to a great extent, so that the pouring compactness is guaranteed, the prefabricated member can be guaranteed to be well formed particularly in the forming process of the prefabricated member, cracks or channels are avoided, and the anti-corrosion performance of the prefabricated member is guaranteed.

In order to ensure the mechanical strength of the prefabricated member, the thickness of the substrate layer is not less than 10 mm; in order to increase the bonding strength between the prefabricated member and the later-stage pouring concrete, the thickness of the rib layer is not suitable to be reduced, and the thickness of the rib layer is not suitable to be too large in order to facilitate the forming of the prefabricated member and the smooth later-stage pouring, so that the thickness of the rib layer is preferably 10-20 mm; the whole thickness of prefab is 25 ~ 60 mm.

In order to further improve the mechanical strength of the prefabricated member, a first reinforcing mesh parallel to the template surface is embedded in the prefabricated member, the diameter of reinforcing steel bars of the first reinforcing mesh is not less than 5mm, the strength is not less than 550 MPa, and the spacing between the reinforcing steel bars is 50-150 mm.

The first reinforcing mesh is paved and buried in the substrate layer, the rib layer is also buried with a second reinforcing mesh parallel to the first reinforcing mesh, the diameter of the reinforcing steel bar of the second reinforcing mesh is not less than 5mm, the strength is not less than 550 MPa, and the spacing between the reinforcing steel bars is 50-150 mm, so that the mechanical strength of the prefabricated member is further improved; preferably, the first mesh reinforcement and the second mesh reinforcement are stacked on each other and contact each other, and when a force is applied, the first mesh reinforcement and the second mesh reinforcement form a mutual counter balance, which helps to prevent the concrete forming the prefabricated member from stress cracking.

The through hole is a stepped hole, the stepped hole is formed by a pre-buried stepped sleeve, the part with the larger diameter of the stepped sleeve is arranged close to the template surface, the diameter of the part with the larger diameter of the stepped sleeve is gradually increased from the template surface to the pouring surface, namely, the part with the larger diameter of the stepped sleeve has a draft angle, and the diameter of the end part of the free end of the part with the larger diameter of the stepped sleeve is smaller than the diameter of the end part of the connecting end (the end connected with the part. The prefabricated member can not be come off from pouring the face because the restriction of its stair structure to the ladder sleeve, makes its most have the draft and can avoid the ladder sleeve to deviate from the template face of prefabricated member, no matter be the effective connection that the prefabricated member can both be guaranteed in the hoist and mount of drawing or dismouting or transportation between the prefabricated member to guarantee the stability of the thin wall protective structure's that the prefabricated member constitutes mechanical properties.

The blind hole is a threaded hole, and the threaded hole is formed by a pre-buried nut.

The prefabricated member is formed by pouring concrete with ultralow water-cement ratio and erosion resistance, and is mainly formed by high-performance concrete with the compression strength of not less than 100MPa, the tensile strength of not less than 5MPa, the water-cement ratio of not more than 0.2, the proportion of mineral admixture in a cementing material of not less than 50 wt%, the particle size of aggregate of not more than 5mm and the volume doping amount of alkali-resistant glass fiber with the diameter of not more than 0.3mm of not less than 0.5 wt%. The fiber and the admixture are introduced, and a thin-wall structure is formed by a prefabrication technology, so that the prefabricated part has good volume stability, can resist tension surface cracking caused by temperature, drying shrinkage and other changes, has extremely low water absorption, strong marine environment salt corrosion resistance and scouring resistance, and good durability; aiming at the characteristics of poor corrosion resistance, easy cracking and the like in marine construction, the composite material can be used on the periphery of concrete in marine construction to form a thin-wall protection structure.

Compared with the prior art, the utility model has following beneficial effect: the utility model discloses a prefabrication technique forms high performance concrete thin wall prefab, construct the concrete periphery with it is used in the maritime work, form thin wall protection architecture one, adopt the tongue-and-groove form to connect between the prefab, multiplicable modified sealing coil between the tongue-and-groove, the gap adopts the inorganic gap filler that excels in of high durability low shrinkage to carry out the structural seal, this structure has scour resistance and anti sea water erosion performance, good tensile strength has simultaneously, can overcome fracture pulling forces such as temperature or shrink, ensure that the surface can not produce infiltration crackle or passageway.

Drawings

Fig. 1 is a front view of a preform.

Fig. 2 is a sectional view a-a.

Fig. 3 is a sectional view B-B.

Fig. 4 is a schematic structural view of a stepped sleeve.

Fig. 5 is a schematic view of tongue and groove butt joints between different preforms.

FIG. 6 is a schematic representation of reinforcement of the preform.

Fig. 7 is a cross-sectional view C-C.

Fig. 8 is a cross-sectional view taken along line D-D.

Description of reference numerals: the steel bar net comprises a pouring surface 001, a template surface 002, a side surface 003, a through hole 010, a stepped sleeve 011, a blind hole 020, a rabbet 030, a step 031, a gap 0311, a crack 0312, a base layer 100, a rib layer 200, a frame rib 210, a bar rib 220, a first steel bar net 310 and a second steel bar net 320.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention. The present invention will be described in further detail with reference to specific embodiments.

As shown in fig. 1 to 3, the high-corrosion-resistance thin-wall prefabricated member comprises a substrate layer 100 and a rib layer 200 overlapped on one surface of the substrate layer 100 and composed of reinforcing ribs, wherein one surface of the substrate layer 100 and the surface of the rib layer 200 jointly form a casting surface 001 of the prefabricated member, the other surface of the substrate layer 100 forms a template surface 002 of the prefabricated member, a side surface 003 of the prefabricated member surrounds the template surface 002 and the casting surface 001, the side surface 003 of the prefabricated member is a side surface 003, the template surface 002 is provided with blind holes 020 used for connecting hoisting equipment, the casting surface 001 is provided with through holes 010 penetrating through the template surface 002, the side surfaces 003 are provided with grooves and tongues 030, projections of the blind holes 020 and the through holes 010 on the template surface 002 are located in projections of the rib layer 200 on the template surface 002, and different prefabricated members can be butted through the grooves and tongues.

On the premise of keeping the thin-wall structure of the prefabricated member, the prefabricated members can be tightly connected together to form a thin-wall protection structure which can be arranged around a marine building through butt joint of the rabbet 030 and counter pulling of the through holes 010, modified sealing coiled materials can be added in the middle of the rabbet 030, and the structure has the performances of scour resistance and seawater corrosion resistance, has good tensile strength, can overcome cracking tensile force such as temperature or shrinkage, ensures that no permeation cracks or channels are generated on the surface, and prolongs the service life of the prefabricated member. During construction, the support frame of the hoisting equipment is connected with the blind holes 020 of the prefabricated members by stainless steel bolts, after the prefabricated members are hoisted in place, the different prefabricated member through holes 010 are connected with oblique-pulling bolts to enable the different prefabricated members to be fixedly connected with each other, and finally concrete is poured in a space surrounded by the pouring surfaces 001 of all the prefabricated members. When the prefabricated member is disassembled or transported, the prefabricated member is hoisted by adopting the hoisting ring connected to the blind hole 020, and the nut corresponding to the hoisting ring is reserved in the steel reinforcement framework before the template is poured. The rib layer 200 that constitutes by the stiffening rib has improved the intensity of prefab, and outstanding in can the associativity better between the rib layer 200 of stratum basale 100 and the concrete of pouring, can effectively protect the inside concrete of ocean engineering not receive the sea water erosion, still helps reducing the whole thickness of prefab, wholly can reduce ocean engineering and synthesize the cost, promotes ocean engineering life, is fit for using widely.

As shown in fig. 1, the rib layer 200 has a fence structure, and includes a square frame rib 210 and a plurality of parallel linear ribs 220 disposed in the frame rib 210, wherein the side surfaces 003 of the frame rib 210 and the side surfaces 003 of the base layer 100 together form the side surfaces 003 of the preform, and the tongue-and-groove 030 is formed in the frame rib 210 and the side surfaces 003 of the base layer 100. The fence type rib layer 200 helps to promote the combination of the precast member pouring surface 001 and the poured concrete, and can avoid the formation of a pouring dead angle on the pouring surface 001 to a great extent, so that the pouring compactness is guaranteed, the precast member can be well molded particularly in the precast member molding process, cracks or channels are avoided, and the anti-corrosion performance of the precast member is guaranteed.

In order to ensure the mechanical strength of the prefabricated member, the thickness of the substrate layer 100 is not less than 10 mm; in order to increase the bonding strength between the prefabricated member and the later-stage pouring concrete, the thickness of the rib layer 200 is not too small, and in order to facilitate the forming of the prefabricated member and the smooth later-stage pouring, the thickness of the rib layer 200 is not too large, so that the thickness of the rib layer 200 is preferably 10-20 mm; the whole thickness of prefab is 25 ~ 60 mm.

As shown in fig. 2, the through hole 010 is a stepped hole, the stepped hole is formed by an embedded stepped sleeve 011, as shown in fig. 4, the portion of the stepped sleeve 011 with a larger diameter is arranged close to the template surface 002 and the diameter thereof is gradually increased from the template surface 002 to the casting surface 001, that is, the portion of the stepped sleeve 011 with a larger diameter has a draft angle and the diameter D of the free end of the portion is smaller than the diameter D of the end of the connecting end (the end connected with the portion of the stepped sleeve 011 with a smaller diameter). Ladder sleeve 011 can not break away from the prefab from pouring face 001 owing to its stair structure's restriction, makes its most have the draft slope and can avoid the ladder sleeve pipe to deviate from the template face 002 of prefab, no matter be the effective connection of prefab can both be guaranteed to the hoist and mount of the opposite drawing between the prefab or dismouting or transportation to guarantee the stability of the thin wall protective structure's that the prefab constitutes mechanical properties.

The blind hole is a threaded hole, and the threaded hole is formed by a pre-buried nut.

The rabbet 030 is formed by steps 031 formed on the side surfaces 003, the steps 031 on opposite sides have different widths W (as can be seen from the enlarged view of fig. 2 or 3, the widths of the steps 031 on both sides are significantly different), and as shown in fig. 5, gaps 0311 for filling with caulking agent are formed on the side of the formwork surface 002 or the casting surface 001 when the different prefabricated members are butted. The arrangement of the gaps 0311 can be better matched with the notches 030, so that the butt joint tightness is improved; the gap 0311 can adopt high-durability low-shrinkage inorganic high-strength gap filler to carry out structural closure, further improves the anti-scouring and seawater erosion resistance performance, tensile strength of prefab, further overcomes the cracking pulling force such as temperature or shrinkage, further ensures that the surface can not produce infiltration crack or passageway. The gaps 0311 with certain width enable the tongue-and-groove 030 to be well matched, and enable the connection between the prefabricated members to be more flexible; however, the gap 0311 may have a width too large to reduce the strength of the butt joint, and the sealing performance may be impaired to various degrees, so that the width of the gap 0311 is preferably 1 to 20 mm. The sum of the thicknesses H of the steps 031 on the opposite sides is less than the overall thickness of the prefabricated parts, a gap 0312 parallel to the template surface 002 is formed between the prefabricated parts when the different prefabricated parts are butted, and the gap 0312 can be filled with modified sealing coils to ensure that no cracks or channels are generated on the surface.

In order to further improve the mechanical strength of the prefabricated member, as shown in fig. 6 to 8, a first mesh reinforcement 310 parallel to the template surface 002 is embedded in the prefabricated member, the diameter of the steel bars of the first mesh reinforcement 310 is not less than 5mm, the strength is not less than 550 mpa, and the steel bar spacing is 50 to 150 mm. The first reinforcing mesh 310 is laid in the base layer 100, the rib layer 200 is also provided with a second reinforcing mesh 320 parallel to the first reinforcing mesh 310, the diameter of the reinforcing steel bar of the second reinforcing mesh 320 is not less than 5mm, the strength is not less than 550 MPa, and the distance between the reinforcing steel bars is 50-150 mm, so that the mechanical strength of the prefabricated member is further improved; preferably, the first mesh reinforcement 310 and the second mesh reinforcement 320 are stacked on each other and contact each other, and when a force is applied, the first mesh reinforcement 310 and the second mesh reinforcement 320 are mutually balanced, which helps prevent stress cracking of the concrete constituting the preform.

The prefabricated member is formed by pouring concrete with ultralow water-cement ratio and erosion resistance, and is mainly formed by high-performance concrete with the compression strength of not less than 100MPa, the tensile strength of not less than 5MPa, the water-cement ratio of not more than 0.2, the proportion of mineral admixture in a cementing material of not less than 50 wt%, the particle size of aggregate of not more than 5mm and the volume mixing amount of alkali-resistant glass fiber with the diameter of not more than 0.3mm of not less than 0.5 wt%. The fiber and the admixture are introduced, and a thin-wall structure is formed by a prefabrication technology, so that the prefabricated part has good volume stability, can resist tension surface cracking caused by temperature, drying shrinkage and other changes, has extremely low water absorption, strong marine environment salt corrosion resistance and scouring resistance, and good durability; aiming at the characteristics of poor corrosion resistance, easy cracking and the like in marine construction, the composite material can be used on the periphery of concrete in marine construction to form a thin-wall protection structure.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The prefabricated member is characterized by comprising a template surface, a pouring surface and side surfaces surrounding the template surface and the pouring surface, wherein the template surface and the pouring surface are opposite, blind holes for connecting hoisting equipment are formed in the template surface, through holes penetrating through the template surface are formed in the pouring surface, grooves and tongues are formed in the side surfaces, different prefabricated members can be butted through the grooves and tongues and connected in a split mode through the through holes, and the prefabricated members are continuously sliced/looped/formed into a cylinder in four directions.

2. The thin-walled preform with high erosion resistance according to claim 1, wherein the tongue-and-groove is formed by steps formed on the side surfaces, the steps on the opposite sides have different widths, and gaps for filling the caulking agent are formed on one side of the formwork surface or the casting surface when different preforms are butted.

3. The thin-walled preform with high erosion resistance according to claim 2, wherein the sum of the thicknesses H of the steps on the opposite sides is smaller than the overall thickness of the preforms, and a gap parallel to the mold plate surface for filling the modified sealing web is formed between the preforms when the different preforms are butted.

4. The thin-walled preform with high erosion resistance according to claim 1, wherein the preform comprises a substrate layer and a rib layer stacked on one surface of the substrate layer and composed of reinforcing ribs, one surface of the substrate layer and the surface of the rib layer jointly form the casting surface, the other surface of the substrate layer forms the template surface, and projections of the blind holes and the through holes on the template surface are positioned in projections of the rib layer on the template surface.

5. The prefabricated member of claim 4, wherein the rib layer has a fence structure and comprises a square frame rib and a plurality of parallel linear ribs arranged in the frame rib, the side surfaces of the frame rib and the side surface of the substrate layer together form the side surfaces of the prefabricated member, and the tongue-and-groove is formed on the side surfaces of the frame rib and the substrate layer.

6. The high erosion resistance thin-walled preform of claim 4, wherein the thickness of the base layer is not less than 10 mm, the thickness of the rib layer is 10-20 mm, and the overall thickness of the preform is 25-60 mm.

7. The high-erosion-resistance thin-wall prefabricated member as claimed in claim 4, wherein a first reinforcing mesh parallel to the formwork surface is embedded in the prefabricated member, the diameter of reinforcing steel bars of the first reinforcing mesh is not less than 5mm, the strength of the first reinforcing mesh is not less than 550 MPa, and the distance between the reinforcing steel bars is 50-150 mm.

8. The thin-walled preform of claim 7, wherein the first mesh reinforcement is embedded in the base layer, the rib layer is embedded with a second mesh reinforcement parallel to the first mesh reinforcement, the second mesh reinforcement has a diameter of not less than 5mm, a strength of not less than 550 MPa, and a reinforcement pitch of 50-150 mm.

9. The high erosion resistance thin-walled preform of claim 1, wherein the through hole is a stepped hole formed by a pre-embedded stepped sleeve, the larger diameter portion of the stepped sleeve is arranged close to the formwork surface and the diameter thereof increases from the formwork surface to the casting surface.

10. The high erosion resistance thin-wall prefabricated member of claim 1, wherein the prefabricated member is cast by concrete with ultra-low water-cement ratio and high erosion resistance, and is mainly formed by concrete with high performance, wherein the concrete has the compression strength of not less than 100MPa, the tensile strength of not less than 5MPa, the water-cement ratio of not more than 0.2, the proportion of mineral admixture in a cementing material of not less than 50 wt%, the particle size of aggregate of not more than 5mm, and the volume mixing amount of alkali-resistant glass fiber with the diameter of not more than 0.3mm of not less than 0.5 wt%.

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