CN112343360A - Protection method for reserved structure of upper cover plate of TOD (time of day) subway - Google Patents
Protection method for reserved structure of upper cover plate of TOD (time of day) subway Download PDFInfo
- Publication number
- CN112343360A CN112343360A CN202011188338.6A CN202011188338A CN112343360A CN 112343360 A CN112343360 A CN 112343360A CN 202011188338 A CN202011188338 A CN 202011188338A CN 112343360 A CN112343360 A CN 112343360A
- Authority
- CN
- China
- Prior art keywords
- reserved
- layer
- tod
- sand
- cover plate
- 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.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/28—Safety or protective measures preventing damage to building parts or finishing work during construction against unfavourable weather influence
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a protection method of a reserved structure of an upper cover plate of a TOD (time of day) subway, which comprises the steps of arranging outer templates around the upper part of the cover plate to form a pouring space, wherein the height of each outer template is greater than the height of a plurality of reserved subway columns protruding out of the cover plate; pouring the low-sand concrete into the pouring space to form a reserved protective layer, wherein the low-sand concrete comprises cement, sand and aggregate, and the weight ratio of the cement to the sand to the aggregate is (4-5): (12-40): 60. the method has the advantages that the small sand concrete is uniformly poured on all reserved columns on the upper portion of the cover plate to form the reserved protective layer, the reserved columns can be quickly separated from the small sand concrete when chiseling is performed at the later stage, and the reserved steel bars cannot be damaged; the antirust ointment or the plastic film does not need to be coated independently, and the protective pipe does not need to be sleeved independently for each reserved steel bar; when chiseling, the less sand concrete is peeled off from the reserved column in a larger block form, so that the less sand concrete is convenient to remove; the construction is simple and convenient, and the later chiseling speed is high.
Description
Technical Field
The invention relates to the technical field of TOD construction, in particular to a method for protecting a reserved structure of an upper cover plate of a TOD subway.
Background
In the TOD (transit-oriented development, TOD, public transportation-oriented development), the space above the subway is usually used as a planning and construction base, i.e. the space of the upper cover plate of the subway. Compared with the traditional project which takes the land and the ground as bases, the TOD project is constructed by taking the roof of a subway building as a base.
When the upper building of the TOD project is designed, the load of the upper building needs to be estimated, and the upper structure reservation work is carried out on an upper cover plate of a subway by using the foundation structure of the subway.
However, due to different construction time arrangements, the construction time of the upper building usually lags behind the construction time of the subway by more than 1-2 years, and therefore, the reserved structure of the upper cover plate of the subway needs to be protected, so that corrosion in the non-constructed 1-2 years is avoided.
Generally speaking, the reserved structure is mostly composed of a plurality of reserved columns (such as reserved steel bars). Because the steel bar is exposed for a long time, the surface of the reserved steel bar is oxidized and rusted. Although the corroded reserved steel bar does not affect the strength of the reserved steel bar, the corrosion can reduce the bond between the reserved steel bar and the concrete. Therefore, the reserved structure (reserved column) needs to be maintained to prevent the reserved structure from being corroded.
For preformed structures that require short term (2 weeks to 3 months) exposure, plastic films are typically used to wrap the preformed structures (preformed columns) to reduce contact of the preformed structures with oxygen and water vapor in the air. For a reserved structure requiring medium-short term (3-6 months) exposure, it is necessary to coat an antirust ointment on the outside of the reserved structure to form a protective film, and then include a plastic film on the outside of the protective film. For the overwintering reserved structure, concrete slurry is coated on the basis of the protective structure.
However, the above protection method is generally only applicable to reserved structures of around 6 months. For the reserved structure which needs to be exposed for a long time, the protective layer can be peeled off due to the reasons of thermal expansion and cold contraction, sunlight solarization, water vapor erosion and the like, so that the protective structure fails.
In the related art, for example, chinese invention patent CN101603369A discloses a method for protecting a reserved steel bar from rust, which comprises sleeving a PVC pipe on the outside of the reserved steel bar, and then injecting concrete composed of low grade cement, medium grain sand and water into the PVC pipe, wherein the diameter of the PVC pipe is more than 2 times of the diameter of the reserved steel bar. The method has good effect on the reserved steel bars with small quantity, dispersion and low height. However, this method cannot be applied to the reserved columns in the TOD project. To the reservation post in the TOD project, it is formed by many reservation reinforcing bars close coupling, and the clearance between reservation reinforcing bar and the reservation reinforcing bar is less, can't carry out PVC tubular product cover to each reservation reinforcing bar and establish.
In addition, the Chinese invention patent CN107288360A discloses a protection method for preventing reserved steel bars from rusting, which comprises the steps of erecting an outer side template on a column wall, filling the middle with a foam board, controlling the thickness of poured concrete to be 100mm, setting the filling material to be 100mm lower than the outer side template, erecting an inner side template in the column when the section Hc of the column is larger than 1200mm and the wall thickness Hc is larger than 400mm, and filling and pouring C15 concrete between the outer side template and the foam board. However, this method cannot be applied to the reserved columns in the TOD project. For the reserved column in the TOD project, the height of the column protruding out of the cover plate is far larger than 100mm, and a foam plate or an inner side template cannot be placed between the reserved column and the reserved column.
In the TOD project, using the conventional method or the related art guard method, there may be the following problems:
because the reserved structure is large, the reserved steel bars are long (usually about 2 m-3 m) and the reserved steel bars are too dense (generally, one reserved column comprises at least 50 reserved steel bars), the reserved steel bars in the center of the reserved structure cannot be coated or cannot be completely coated by constructors, and rust removal operation is difficult to perform if rust is generated in the later period;
for coating antirust factice or using a plastic film to coat a reserved steel bar or a reserved column, the antirust factice is extremely easy to damage;
if the concrete slurry is coated on the outer side of the reserved steel bar, the concrete slurry is expanded or washed by rainwater due to high temperature in summer, so that the concrete slurry is automatically peeled off from the outer side of the reserved steel bar.
At present, no effective solution is provided for the problem that the reserved steel bars of TOD projects in the related technology need long-term protection.
Disclosure of Invention
The invention aims to provide a method for protecting a reserved structure of an upper cover plate of a TOD (time of day) subway, aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a TOD subway upper cover plate preformed structure's protection method, is applied to TOD apron structure, TOD apron structure includes sub-body structure, roofing building surface course, first interim protection pouring layer and a plurality of preformed structure, roofing building surface course sets up the upper surface of sub-body structure, and a plurality of preformed structure with sub-body structure is integrative and the protrusion roofing building surface course sets up, sets up first interim protection pouring layer in each preformed structure in the junction of roofing building surface course, preformed structure includes a plurality of reservation posts, includes:
arranging an outer template around the outer side of the reserved structure, wherein the bottom of the outer template is in contact with the surface layer of the roof building to form a pouring space, and the outer template is arranged to protrude out of the top end of the reserved structure;
pouring low-sand concrete into the pouring space to form a long-term protective pouring layer above the first temporary protective pouring layer, wherein the low-sand concrete comprises cement, sand and aggregate, and the weight ratio of the cement to the sand to the aggregate is (4-5): (12-40): 60, and the particle size of the aggregate is smaller than or equal to the distance between two adjacent reserved columns;
and removing the outer template to expose the long-term protection pouring layer.
In some of these embodiments, the aggregate has a particle size of 5mm to 25 mm.
In some embodiments, the sand-less concrete further comprises water, and the weight ratio of the cement to the sand to the aggregate to the water is (4-5): (12-40): 60: (A to B).
In some embodiments, after an outer formwork is disposed around an outer side of the reserved structure to form a casting space, the method further includes:
and arranging a plurality of supporting structures on the outer side of the outer template so as to fix the outer template.
In some of these embodiments, after removing the outer template, further comprising:
chiseling the long-term protection pouring layer, the first temporary protection pouring layer and a part of the roof building surface layer to form chiseling grooves;
wherein the reserved structure has a first cross-sectional projection range, the gouging slot has a fourth cross-sectional projection range, and the first cross-sectional projection range is located inside the fourth cross-sectional projection range.
In some of these embodiments, after forming the gouging slot, the method further comprises:
arranging a water-blocking back threshold, wherein the water-blocking back threshold is arranged at the edge of the top surface of the chiseling groove, the water-blocking back threshold has a fifth cross section projection range and a sixth cross section projection range, the fifth cross section projection range is overlapped with the fourth cross section projection range, and the fifth cross section projection range is positioned in the sixth cross section projection range;
arranging a temporary waterproof coating, wherein the temporary waterproof coating covers the surface of the chiseling groove and the inner surface of the water retaining reverse ridge;
arranging a second temporary protective pouring layer, wherein the second temporary protective pouring layer covers the chiseling groove and part of the reserved structure, and the second temporary protective pouring layer is made of less-sand concrete;
set up waterproof membrane layer, wherein, waterproof membrane layer's outward flange with the anti-bank of manger plate and/or interim waterproof coating connects, waterproof membrane layer's inward flange with the connection is pour to the interim protection of second, just waterproof membrane layer's inward flange is not less than apart from the height of horizontal plane waterproof membrane layer's outward flange.
In some of these embodiments, the longitudinal section of the second temporary protective casting has a convex shape, the second temporary protective casting having a first height equal to the height of the roofing surface and a second height equal to the height of the first temporary protective casting.
In some of these embodiments, the gouging is of a height equal to the height of the roofing shingle.
In some of these embodiments, the minimum distance between the side wall of the gouging groove and the outer wall of the reservation structure is 500mm to 600 mm.
In some of these embodiments, the first temporary protective casting is comprised of low-sand concrete.
In one embodiment, the grit has a fineness modulus of X-Y.
In one embodiment, the temporary waterproof coating is a polyurethane film waterproof layer.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
according to the protection method for the reserved structure of the upper cover plate of the TOD subway, provided by the invention, the small sand concrete is uniformly poured on all reserved columns on the upper part of the cover plate to form the reserved protective layer, so that the reserved columns and the small sand concrete can be quickly separated when chiseling off at the later stage, and the reserved steel bars cannot be damaged; the antirust ointment or the plastic film does not need to be coated independently, and the protective pipe does not need to be sleeved independently for each reserved steel bar; when chiseling, the less sand concrete is peeled off from the reserved column in a larger block form, so that the less sand concrete is convenient to remove; the construction is simple and convenient, and the later chiseling speed is high.
Drawings
Fig. 1 is a schematic diagram of an original state of a reservation structure according to an embodiment of the present invention.
Fig. 2 is a schematic longitudinal sectional view of an original state of a reserved structure according to an embodiment of the present invention.
Fig. 3 is a schematic diagram (one) of a first construction state of a reserved structure according to an embodiment of the present invention.
Fig. 4 is a longitudinal sectional view schematically (one) of a first construction state of the reserved structure according to the embodiment of the present invention.
Fig. 5 is a schematic view (ii) of a first construction state of the reserved structure according to the embodiment of the present invention.
Fig. 6 is a schematic longitudinal sectional view (ii) of the first construction state of the reserved structure according to the embodiment of the present invention.
Fig. 7 is a schematic view (iii) of a first construction state of a reserved structure according to an embodiment of the present invention.
Fig. 8 is a longitudinal sectional view schematically showing a first construction state of the reserved structure according to the embodiment of the present invention (iii).
Fig. 9 is a schematic diagram (one) of a second construction state of the reserved structure according to the embodiment of the invention.
Fig. 10 is a longitudinal sectional view schematically showing a second construction state of the reserved structure according to the embodiment of the present invention (one).
Fig. 11 is a schematic view (ii) of a second construction state of the reserved structure according to the embodiment of the present invention.
Fig. 12 is a schematic longitudinal sectional view (ii) of the second construction state of the reserved structure according to the embodiment of the present invention.
Wherein the reference numerals are: the roof structure comprises a lower main body structure 1, a roof building surface layer 2, a first temporary protection pouring layer 3, a reserved structure 4, an outer template 5, a supporting structure 6, a long-term protection pouring layer 7, a chiseling groove 8, a water retaining reverse ridge 9, a temporary waterproof coating 10, a second temporary protection pouring layer 11 and a waterproof film layer 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1
The embodiment is that the construction is carried out for the first time to TOD subway upper cover plate reserved structure, exerts long-term protection architecture to TOD subway upper cover plate reserved structure promptly.
As shown in fig. 1-2, TOD subway upper cover plate reserved structure includes substructure 1, roofing surface course 2, layer 3 is pour in first interim protection, a plurality of reservation structures 4, wherein, roofing surface course 2 sets up the upper surface at substructure 1, a plurality of reservation structures and substructure 1 an organic whole and protrusion set up in roofing surface course 2, set up first interim protection in the junction of roofing surface course 2 at each reservation structure 4 and pour layer 3, and each reservation structure 4 includes a plurality of reservation posts (if reserve the reinforcing bar).
The cross section of the reserved structure 4 is rectangular or circular, and in this embodiment, the cross section of the reserved structure 4 is rectangular.
The method comprises the following steps of constructing the reserved structure of the upper cover plate of the TOD subway for the first time, namely protecting the reserved structure of the upper cover plate of the TOD subway for a long time, wherein the protection method comprises the following steps:
firstly, as shown in fig. 3 to 4, an outer formwork 5 is arranged around the outer side of each reserved structure 4, the bottom of the outer formwork 5 is in contact with the roof building surface layer 2, and the outer formwork 5 protrudes out of the top end of the reserved structure 4, so that a pouring space is formed between the outer formwork 5 and the reserved structure 4.
Wherein, the cross section of the outer template 5 is annular, such as circular annular and rectangular annular.
The inner surface of the outer formwork 5 and the outer surface of the first temporary protection pouring layer 3 are located on the same vertical plane, or the inner surface of the outer formwork 5 is located on the outer side of the outer surface of the first temporary protection pouring layer 3.
Under the condition that the outer template 5 is in a circular ring shape, the inner diameter (diameter) of the outer template 5 is larger than the length of a diagonal line of the reserved structure; in the case where the outer form 5 has a rectangular ring shape, the length of the inner diagonal of the outer form 5 is greater than the length of the diagonal of the reserved structure.
Specifically, the reserved structure 4 has a first cross-sectional projection range, and the outer template 5 has a second cross-sectional projection range and a third cross-sectional projection range, the first cross-sectional projection range being inside the second cross-sectional projection range, and the second cross-sectional projection range being inside the third cross-sectional projection range.
In some of these embodiments, to improve the stability of the outer formworks 5, several support structures 6 are provided on the outer side of the outer formworks 5 for fixing the outer formworks 5.
Wherein in each support structure 6, the outer formworks 5 are fixed by a combination of baffles, bolts, etc.
And secondly, as shown in fig. 5 to 6, pouring low-sand concrete into each pouring space to form a long-term protective pouring layer 7 above the first temporary protective pouring layer 3.
The low-sand concrete comprises cement, sand and aggregate, and the weight ratio of the cement to the sand to the aggregate is (4-5): (12-40): 60, i.e. the sand to sand ratio (sand to aggregate ratio) is 1: 1.5-5, wherein the ash-to-bone ratio (the ratio of cement to aggregate) is 1: 12 to 15.
Wherein, the aggregate can be broken stone, ceramsite or construction waste (such as broken bricks, concrete fragments and the like) with higher strength.
Wherein the grain diameter of the aggregate is smaller than the distance between two adjacent reserved steel bars, and the grain diameter range is 5-25 mm.
In addition, the less-sand concrete also comprises water, and the weight ratio of the cement, the sand, the aggregate and the water is (4-5): (12-40): 60: (A to B).
The strength of the long-term-protection casting layer 7 is C15.
Thirdly, as shown in fig. 7 to 8, the outer formwork 5 is removed to expose the long-term protective casting layer 7.
In some of these embodiments, in the case of fixing the outer formworks 5 with several support structures 6, for each of the obligatory structures 4, first several support structures 6 of its outer side are removed, then the outer formworks 5 are removed.
By utilizing the long-term protection pouring layer 7, a plurality of reserved structures 4 above the lower main body structure 1 can be protected for a long term 1-2 years after the construction of the lower main body structure 1 is completed, and a plurality of reserved columns (such as reserved steel bars) of the reserved structures 4 are prevented from being corroded; in the case where the upper part of the lower main body structure 1 needs to be constructed, the long-term protective casting layer 7 can be quickly and easily chiseled off without damaging the reserved structure 4, so that the reserved structure 4 is exposed for subsequent construction.
Furthermore, in order to facilitate the chiseling out of the first temporary protective casting layer 3, the first temporary protective casting layer 3 is likewise cast from the low-sand concrete according to the invention.
According to the invention, the low-sand concrete is adjusted, the cement consumption is reduced, the particle size of the aggregate is increased, the proportion of the sand and stone is adjusted, after the concrete is hardened, the long-term protection pouring layer formed by the low-sand concrete has low strength and light volume weight due to the lack of fine sand for filling gaps among coarse aggregates with large diameters, so that the long-term protection pouring layer formed by the low-sand concrete has the characteristics of low strength, small aggregate binding power, easiness in stripping among the aggregates, firmness, durability, water resistance, seepage resistance and the like, not only is the reserved structure (reserved steel bars) protected simply and conveniently, but also the long-term weather resistance is realized, and the later-period.
Example 2
This example is a verification example of the low-sand concrete of example 1.
In this example, two sets of control concretes, one set of the inventive sand-reduced concrete, were selected, which are specified in the following table:
concrete columns (long-term protective casting layers) of 1.4m by 2.5m (length by width by height) were produced using the above-mentioned concretes, respectively.
And (3) damaging the three concrete columns by using a crushing tool to verify the effect.
Specifically, a B67 type pneumatic pick is used, the working air pressure is 0.63MPa, the impact energy is 37J, the restarting power is 0.9kW, and the concrete columns are respectively crushed by being held by a single person.
To the concrete column of lower part major structure concrete preparation, need adopt the pick machine to break off the back to outlying concrete, just can use the pneumatic pick to carry out breakage (chisel promptly) to the concrete column, to the concrete column of the 300mm within range of concrete column below, need adopt artifical pneumatic pick to chisel simultaneously and remove, chisel and remove the time and be 60 man-hours.
For a concrete column prepared from common concrete, a pick head machine is needed to break peripheral concrete, and then an air pick can be used for breaking (namely chiseling) the concrete column, and meanwhile, for the concrete column within the range of 300mm below the concrete column, an artificial air pick is needed to chisel, and the chiseling time is 30 hours.
For a concrete column prepared from the low-sand concrete, the concrete column can be damaged only by using a B67 type pneumatic pick, and the chiseling time is 15 hours.
According to the verification and comparison, the sand-less concrete provided by the invention can greatly reduce the walking-out time of a single reserved structure, reduce the use of chiseling tools and improve chiseling efficiency.
In addition, when chiseling, because the less sand concrete aggregate quantity is more, at the chiseling in-process, can form massive concrete disintegrating slag and pour the layer from long-term protection and drop, the later stage of being convenient for is cleared up.
Example 3
This embodiment is for carrying out the second construction to TOD subway upper cover plate preformed structure, exerts interim protection architecture to TOD subway upper cover plate preformed structure promptly.
On the basis of the protection structure of the embodiment 1, the reserved structure of the upper cover plate of the TOD subway is constructed for the second time, namely the reserved structure of the upper cover plate of the TOD subway is temporarily protected, and the protection method comprises the following steps:
first, as shown in fig. 9 to 10, for each reserved structure 4, a long-term protection casting layer 7, a first temporary protection casting layer 3, and a part of the roof building surface layer 2 are chiseled off in sequence to form a chiseled-off groove 8.
Wherein the cross section of the chiseling groove 8 is rectangular and circular.
In the case where the cross section of the gouging groove 8 is rectangular, the length of the diagonal of the gouging groove 8 is greater than the length of the diagonal of the reserved structure 4; in the case where the cross-section of the gouging groove 8 is circular, the inner diameter (diameter) of the gouging groove 8 is greater than the length of the diagonal of the reserved structure 4.
In particular, the chiseling groove 8 has a fourth cross-sectional projection range, the first cross-sectional projection range of the obligatory structure 4 being inside the fourth cross-sectional projection range.
In some of these embodiments, the minimum distance between the side walls of the gouging groove 8 and the outer wall of the rebate formation 4 is 500mm to 600 mm.
Specifically, in the case that the cross section of the gouging groove 8 is rectangular, the difference between the shortest side of the gouging groove 8 and the shortest side of the reserved structure 4 is 1000mm to 1200mm, that is, the distance between the shortest side of the gouging groove 8 and the shortest side of the reserved structure 4 is 500mm to 600 mm; the difference between the longest side of the gouging groove 8 and the longest side of the obligation structure 4 is 1000 mm-1200 mm, i.e. the distance between the longest side of the gouging groove 8 and the longest side of the obligation structure 4 is 500 mm-600 mm.
In the case where the cross-section of the gouging groove 8 is circular, the difference between the inner diameter (diameter) of the gouging groove 8 and the length of the diagonal of the reserved structure 4 is 1000mm to 1200mm, i.e. the distance between the side wall of the gouging groove 8 and the tip (right-angled side) of the reserved structure 4 is 500mm to 600 mm.
In the second step, as shown in fig. 11 to 12, a water blocking sill 9 is provided for each reserved structure 4.
Specifically, the water deflector ridge 9 is provided at the edge of the top surface of the chiseling groove 8.
The cross section of the water retaining reverse ridge 9 is annular, such as circular annular and rectangular annular.
The water retaining back ridge 9 is provided with a fifth cross section projection range and a sixth cross section projection range, the fifth cross section projection range is overlapped with the fourth cross section projection range, and the fifth cross section projection range is located inside the sixth cross section projection range.
Thirdly, as shown in fig. 11 to 12, a temporary waterproof coating 10 is provided for each reserved structure 4.
Specifically, the temporary waterproof coating 10 covers the surface of the gouging groove 8 and the inner surface of the water deflector ridge 9.
Wherein the gouging groove 8 has a bottom surface and a side surface, and the temporary waterproof coating 10 covers the bottom surface and the side surface of the gouging groove 8.
In some of these embodiments, the temporary water-repellent coating 10 is a polyurethane-coated water-repellent layer.
Fourthly, as shown in fig. 11 to 12, for each reserved structure 4, a second temporary protective pouring layer 11 is arranged.
In particular, the second temporary protective casting layer 11 covers the gouging groove 8 and part of the preliminary structure 4.
Wherein the longitudinal section of the second temporary protective casting layer 11 is convex, having a first height and a second height.
The first height is equal to the height of the roofing 2 (negligible due to the small thickness of the temporary waterproof coating 10), or the top of the first horizontal surface of the second temporary protective casting 11 (i.e. having the first height) is at the same level as the top of the roofing 2.
The second height is equal to the height of the first temporary protective casting layer 3, or the top end of the second horizontal plane (i.e. having the second height) of the second temporary protective casting layer 11 is at the same horizontal plane as the top end of the original first temporary protective casting layer 3.
Wherein the second temporary protective casting layer 11 is likewise made of the low-sand concrete according to the invention.
And fifthly, as shown in fig. 11 to 12, arranging a waterproof film layer 12 for each reserved structure 4.
Specifically, the outer edge of the waterproofing membrane 12 is connected with the water-retaining back sill 9 and/or the temporary waterproofing coating 10, and the inner edge of the waterproofing membrane 12 is connected with the second temporary protective casting layer 11.
Further, the height of the inner edge of the waterproof film layer 12 from the horizontal plane is not less than the height of the outer edge of the waterproof film layer 12 from the horizontal plane.
Wherein, the waterproof membrane layer 12 is a waterproof plastic film.
In this embodiment, can have certain construction clearance usually before chiseling away long-term protection pouring layer 7 back and formal construction, for avoiding appearing reserving the appearance that the post is corroded, rainwater seepage scheduling problem in the construction clearance in-process, all protect temporarily at each reservation structure 4, utilize the anti bank 9 of manger plate, interim waterproof coating 10, the interim protection of second is poured layer 11 and waterproof rete 12, can avoid rainwater seepage to chiseling the lower part major structure 1 that the groove 8 silts up and leads to downward seepage.
Example 4
This example is a specific example of example 1.
Set up exterior sheathing 5 in the outside of each reserved structure 4 is encircleed, the bottom and the roof building surface course 2 contact of exterior sheathing 5, and exterior sheathing 5 protrusion sets up in the top of reserved structure 4 to form between exterior sheathing 5 and reserved structure 4 and pour the space.
And a plurality of supporting structures 6 are arranged on the outer side of the outer template 5 and used for fixing the outer template 5.
Less-sand concrete is poured into each casting space to form a long-term protective casting layer 7 above the first temporary protective casting layer 3.
The outer formwork 5 is removed to expose the long-term protective casting layer 7.
Wherein, the little sand concrete includes cement, sand, aggregate and water, and the weight ratio of cement, sand, aggregate, water is 4: 13: 60: 5.
wherein the aggregate is crushed stone with the particle size of 5 mm-20 mm.
The strength of the long-term-protection casting layer 7 is C15.
In this example, the efficiency of chiseling the low-sand concrete is improved by about 34% compared to the concrete of grade C30.
Example 5
This example is a specific example of example 1.
Set up exterior sheathing 5 in the outside of each reserved structure 4 is encircleed, the bottom and the roof building surface course 2 contact of exterior sheathing 5, and exterior sheathing 5 protrusion sets up in the top of reserved structure 4 to form between exterior sheathing 5 and reserved structure 4 and pour the space.
And a plurality of supporting structures 6 are arranged on the outer side of the outer template 5 and used for fixing the outer template 5.
Less-sand concrete is poured into each casting space to form a long-term protective casting layer 7 above the first temporary protective casting layer 3.
The outer formwork 5 is removed to expose the long-term protective casting layer 7.
The less-sand concrete comprises cement, sand, aggregate and water, and the weight ratio of the cement to the sand to the aggregate to the water is 4.6: 16: 60: 5.3.
wherein the aggregate is broken stone, and the particle size range of the broken stone is 10 mm-20 mm.
The strength of the long-term-protection casting layer 7 is C15.
In this example, the efficiency of chiseling the low-sand concrete is improved by about 32% compared to the concrete of grade C30.
Example 6
This example is a specific example of example 1.
Set up exterior sheathing 5 in the outside of each reserved structure 4 is encircleed, the bottom and the roof building surface course 2 contact of exterior sheathing 5, and exterior sheathing 5 protrusion sets up in the top of reserved structure 4 to form between exterior sheathing 5 and reserved structure 4 and pour the space.
And a plurality of supporting structures 6 are arranged on the outer side of the outer template 5 and used for fixing the outer template 5.
Less-sand concrete is poured into each casting space to form a long-term protective casting layer 7 above the first temporary protective casting layer 3.
The outer formwork 5 is removed to expose the long-term protective casting layer 7.
Wherein, the less sand concrete includes cement, sand, aggregate and water, and the weight ratio of cement, sand, aggregate, water is 5: 20: 60: 6.
wherein the aggregate is broken stone, and the particle size range of the broken stone is 15 mm-25 mm.
The strength of the long-term-protection casting layer 7 is C15.
In this example, the efficiency of chiseling the low-sand concrete is improved by about 36% compared to the concrete of grade C30.
Example 7
This example is a specific example of example 1.
Set up exterior sheathing 5 in the outside of each reserved structure 4 is encircleed, the bottom and the roof building surface course 2 contact of exterior sheathing 5, and exterior sheathing 5 protrusion sets up in the top of reserved structure 4 to form between exterior sheathing 5 and reserved structure 4 and pour the space.
And a plurality of supporting structures 6 are arranged on the outer side of the outer template 5 and used for fixing the outer template 5.
Less-sand concrete is poured into each casting space to form a long-term protective casting layer 7 above the first temporary protective casting layer 3.
The outer formwork 5 is removed to expose the long-term protective casting layer 7.
The less-sand concrete comprises cement, sand, aggregate and water, and the weight ratio of the cement to the sand to the aggregate to the water is 4.3: 23: 60: 4.7.
wherein the aggregate is broken stone, and the particle size range of the broken stone is 5 mm-15 mm.
The strength of the long-term-protection casting layer 7 is C15.
In this example, the efficiency of chiseling the low-sand concrete is improved by about 31% compared to the concrete of grade C30.
Example 8
This example is a specific example of example 1.
Set up exterior sheathing 5 in the outside of each reserved structure 4 is encircleed, the bottom and the roof building surface course 2 contact of exterior sheathing 5, and exterior sheathing 5 protrusion sets up in the top of reserved structure 4 to form between exterior sheathing 5 and reserved structure 4 and pour the space.
And a plurality of supporting structures 6 are arranged on the outer side of the outer template 5 and used for fixing the outer template 5.
Less-sand concrete is poured into each casting space to form a long-term protective casting layer 7 above the first temporary protective casting layer 3.
The outer formwork 5 is removed to expose the long-term protective casting layer 7.
The less-sand concrete comprises cement, sand, aggregate and water, and the weight ratio of the cement to the sand to the aggregate to the water is 4.9: 15: 60: 5.6.
wherein the aggregate is broken stone with the particle size range of 10 mm-25 mm.
The strength of the long-term-protection casting layer 7 is C15.
In this example, the efficiency of chiseling the low-sand concrete is improved by about 33% compared to the concrete of grade C30.
Example 9
This example is a specific example of example 1.
Set up exterior sheathing 5 in the outside of each reserved structure 4 is encircleed, the bottom and the roof building surface course 2 contact of exterior sheathing 5, and exterior sheathing 5 protrusion sets up in the top of reserved structure 4 to form between exterior sheathing 5 and reserved structure 4 and pour the space.
And a plurality of supporting structures 6 are arranged on the outer side of the outer template 5 and used for fixing the outer template 5.
Less-sand concrete is poured into each casting space to form a long-term protective casting layer 7 above the first temporary protective casting layer 3.
The outer formwork 5 is removed to expose the long-term protective casting layer 7.
The less-sand concrete comprises cement, sand, aggregate and water, and the weight ratio of the cement to the sand to the aggregate to the water is 4.5: 19: 60: 4.8.
wherein the aggregate is broken stone, and the particle size range of the broken stone is 5 mm-25 mm.
The strength of the long-term-protection casting layer 7 is C15.
In this example, the efficiency of chiseling the low-sand concrete is improved by about 32% compared to the concrete of grade C30.
Example 10
This example is a specific example of example 3.
Arranging a water retaining reverse ridge 9 at the edge of the top surface of the chiseling groove 8;
a temporary waterproof coating 10 is provided so that the temporary waterproof coating 10 covers the surface of the gouging groove 8 and the inner surface of the water-retaining sill 9;
arranging a second temporary protection pouring layer 11 so that the second temporary protection pouring layer 11 covers the chiseling groove 8 and part of the reserved structure 4;
the waterproof membrane layer 12 is arranged so that the outer edge of the waterproof membrane layer 12 is connected with the water retaining sill 9 and/or the temporary waterproof coating 10 and the inner edge of the waterproof membrane layer 12 is connected with the second temporary protective casting layer 11.
Wherein the second temporary protective casting layer 11 is made of low-sand concrete, and the weight ratio of each component is the same as that of the embodiment 4-9
Wherein the minimum distance between the side wall of the chiseling groove 8 and the outer wall of the reserved structure 4 is 500 mm.
Wherein, the temporary waterproof coating 10 is a polyurethane coating waterproof layer.
Wherein, the waterproof membrane layer 12 is a waterproof plastic film.
Example 11
This example is a specific example of example 3.
Arranging a water retaining reverse ridge 9 at the edge of the top surface of the chiseling groove 8;
a temporary waterproof coating 10 is provided so that the temporary waterproof coating 10 covers the surface of the gouging groove 8 and the inner surface of the water-retaining sill 9;
arranging a second temporary protection pouring layer 11 so that the second temporary protection pouring layer 11 covers the chiseling groove 8 and part of the reserved structure 4;
the waterproof membrane layer 12 is arranged so that the outer edge of the waterproof membrane layer 12 is connected with the water retaining sill 9 and/or the temporary waterproof coating 10 and the inner edge of the waterproof membrane layer 12 is connected with the second temporary protective casting layer 11.
Wherein the second temporary protective casting layer 11 is made of low-sand concrete, and the weight ratio of each component is the same as that of the embodiment 4-9
Wherein the minimum distance between the side wall of the chiseling groove 8 and the outer wall of the reserved structure 4 is 530 mm.
Wherein, the temporary waterproof coating 10 is a polyurethane coating waterproof layer.
Wherein, the waterproof membrane layer 12 is a waterproof plastic film.
Example 12
This example is a specific example of example 3.
Arranging a water retaining reverse ridge 9 at the edge of the top surface of the chiseling groove 8;
a temporary waterproof coating 10 is provided so that the temporary waterproof coating 10 covers the surface of the gouging groove 8 and the inner surface of the water-retaining sill 9;
arranging a second temporary protection pouring layer 11 so that the second temporary protection pouring layer 11 covers the chiseling groove 8 and part of the reserved structure 4;
the waterproof membrane layer 12 is arranged so that the outer edge of the waterproof membrane layer 12 is connected with the water retaining sill 9 and/or the temporary waterproof coating 10 and the inner edge of the waterproof membrane layer 12 is connected with the second temporary protective casting layer 11.
Wherein the second temporary protective casting layer 11 is made of low-sand concrete, and the weight ratio of each component is the same as that of the embodiment 4-9
Wherein the minimum distance between the side wall of the chiseling groove 8 and the outer wall of the reserved structure 4 is 550 mm.
Wherein, the temporary waterproof coating 10 is a polyurethane coating waterproof layer.
Wherein, the waterproof membrane layer 12 is a waterproof plastic film.
Example 13
This example is a specific example of example 3.
Arranging a water retaining reverse ridge 9 at the edge of the top surface of the chiseling groove 8;
a temporary waterproof coating 10 is provided so that the temporary waterproof coating 10 covers the surface of the gouging groove 8 and the inner surface of the water-retaining sill 9;
arranging a second temporary protection pouring layer 11 so that the second temporary protection pouring layer 11 covers the chiseling groove 8 and part of the reserved structure 4;
the waterproof membrane layer 12 is arranged so that the outer edge of the waterproof membrane layer 12 is connected with the water retaining sill 9 and/or the temporary waterproof coating 10 and the inner edge of the waterproof membrane layer 12 is connected with the second temporary protective casting layer 11.
Wherein the second temporary protective casting layer 11 is made of low-sand concrete, and the weight ratio of each component is the same as that of the embodiment 4-9
Wherein the minimum distance between the side wall of the chiseling groove 8 and the outer wall of the reserved structure 4 is 575 mm.
Wherein, the temporary waterproof coating 10 is a polyurethane coating waterproof layer.
Wherein, the waterproof membrane layer 12 is a waterproof plastic film.
Example 14
This example is a specific example of example 3.
Arranging a water retaining reverse ridge 9 at the edge of the top surface of the chiseling groove 8;
a temporary waterproof coating 10 is provided so that the temporary waterproof coating 10 covers the surface of the gouging groove 8 and the inner surface of the water-retaining sill 9;
arranging a second temporary protection pouring layer 11 so that the second temporary protection pouring layer 11 covers the chiseling groove 8 and part of the reserved structure 4;
the waterproof membrane layer 12 is arranged so that the outer edge of the waterproof membrane layer 12 is connected with the water retaining sill 9 and/or the temporary waterproof coating 10 and the inner edge of the waterproof membrane layer 12 is connected with the second temporary protective casting layer 11.
Wherein the second temporary protective casting layer 11 is made of low-sand concrete, and the weight ratio of each component is the same as that of the embodiment 4-9
Wherein the minimum distance between the side wall of the chiseling groove 8 and the outer wall of the reserved structure 4 is 600 mm.
Wherein, the temporary waterproof coating 10 is a polyurethane coating waterproof layer.
Wherein, the waterproof membrane layer 12 is a waterproof plastic film.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a TOD subway upper cover plate preformed structure's protection method, is applied to TOD apron structure, TOD apron structure includes lower part major structure (1), roofing building surface course (2), first interim protection pouring layer (3) and a plurality of preformed structure (4), roofing building surface course (2) set up the upper surface of lower part major structure (1), a plurality of preformed structure (4) with lower part major structure (1) is integrative and the protrusion roofing building surface course (2) set up, at each preformed structure (4) in the junction of roofing building surface course (2) sets up first interim protection pouring layer (3), preformed structure (4) include a plurality of reservation posts, its characterized in that includes:
an outer template (5) is arranged on the outer side of the reserved structure (4) in a surrounding mode, the bottom of the outer template (5) is in contact with the roof building surface layer (2) to form a pouring space, and the outer template (5) protrudes out of the top end of the reserved structure (4);
pouring low-sand concrete into the pouring space to form a long-term protective pouring layer (7) above the first temporary protective pouring layer (3), wherein the low-sand concrete comprises cement, sand and aggregate, and the weight ratio of the cement to the sand to the aggregate is (4-5): (12-40): 60, and the particle size of the aggregate is smaller than or equal to the distance between two adjacent reserved columns;
removing the outer formwork (5) to expose the long-term protective casting layer (7).
2. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 1, wherein the particle size of the aggregate is 5 mm-25 mm.
3. The method for protecting the reserved structure of the TOD subway upper cover plate according to claim 1, wherein the sand-less concrete further comprises water, and the weight ratio of cement, sand, aggregate and water is (4-5): (12-40): 60: (A to B).
4. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 1, wherein after an external template (5) is arranged around the outside of the reserved structure (4) to form a pouring space, the method further comprises:
and arranging a plurality of supporting structures (6) on the outer side of the outer template (5) to fix the outer template (5).
5. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 1, further comprising, after removing the outer formwork (5):
chiseling the long-term protection casting layer (7), the first temporary protection casting layer (3) and a part of the roof building surface layer (2) to form a chiseling groove (8);
wherein the reservation (4) has a first cross-sectional projection range and the chiseling groove (8) has a fourth cross-sectional projection range, the first cross-sectional projection range being located within the fourth cross-sectional projection range.
6. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 5, wherein after forming the chiseling groove (8), the method further comprises:
arranging a water-blocking back threshold (9), wherein the water-blocking back threshold (9) is arranged at the edge of the top surface of the chiseling groove (8), the water-blocking back threshold (9) is provided with a fifth cross section projection range and a sixth cross section projection range, the fifth cross section projection range is overlapped with the fourth cross section projection range, and the fifth cross section projection range is positioned in the sixth cross section projection range;
providing a temporary water-repellent coating (10), wherein the temporary water-repellent coating (10) covers the surface of the gouging groove (8) and the inner surface of the water-retaining sill (9);
arranging a second temporary protective casting layer (11), wherein the second temporary protective casting layer (11) covers the chiseling groove (8) and a part of the reserved structure (4), and the second temporary protective casting layer (11) is made of low-sand concrete;
setting up waterproof membrane layer (12), wherein, the outward flange of waterproof membrane layer (12) with anti bank (9) of manger plate and/or interim waterproof coating (10) are connected, the inward flange of waterproof membrane layer (12) with the second is interim protects pouring layer (11) and is connected, just the inward flange of waterproof membrane layer (12) is not less than apart from the height of horizontal plane the outward flange of waterproof membrane layer (12) is apart from the height of horizontal plane.
7. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 6, wherein the longitudinal section of the second temporary protection pouring layer (11) is convex, the second temporary protection pouring layer (11) has a first height and a second height, the first height is equal to the height of the roofing building surface layer (2), and the second height is equal to the height of the first temporary protection pouring layer (3).
8. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 5, wherein the height of the chiseling groove (8) is equal to the height of the roofing building surface layer (2).
9. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 5, wherein the minimum distance between the side wall of the chiseling groove (8) and the outer wall of the reserved structure (4) is 500 mm-600 mm.
10. The method for protecting the reserved structure of the upper cover plate of the TOD subway according to claim 1, wherein said first temporary protective casting layer (3) is made of sand-less concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011188338.6A CN112343360B (en) | 2020-10-30 | 2020-10-30 | Protection method for reserved structure of upper cover plate of TOD (time of day) subway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011188338.6A CN112343360B (en) | 2020-10-30 | 2020-10-30 | Protection method for reserved structure of upper cover plate of TOD (time of day) subway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112343360A true CN112343360A (en) | 2021-02-09 |
| CN112343360B CN112343360B (en) | 2022-03-18 |
Family
ID=74356688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011188338.6A Active CN112343360B (en) | 2020-10-30 | 2020-10-30 | Protection method for reserved structure of upper cover plate of TOD (time of day) subway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112343360B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474077B1 (en) * | 2004-10-08 | 2005-03-14 | (주)한림종합건축사사무소 | Protection box for exposed steel reinforcing for reinforced concrete construction and the method using the same |
| CN105064579A (en) * | 2015-09-01 | 2015-11-18 | 江苏兴厦建设工程集团有限公司 | Construction method guaranteeing pouring formation of toilet water-stop ridge platform |
| CN207268090U (en) * | 2017-08-31 | 2018-04-24 | 上海建工七建集团有限公司 | Reserved joint bar protective device |
| CN211472582U (en) * | 2019-12-20 | 2020-09-11 | 广州珠江建设发展有限公司 | Construction lane waterproof construction after anti-bank of subway upper cover movement joint breaks away |
| CN111648628A (en) * | 2020-04-30 | 2020-09-11 | 成都建工集团有限公司 | Construction method for upper cover building of subway parking garage |
| CN211714635U (en) * | 2019-12-27 | 2020-10-20 | 中铁第一勘察设计院集团有限公司 | Closed concrete protection structure of vertical member reserved steel bar is opened to upper cover |
-
2020
- 2020-10-30 CN CN202011188338.6A patent/CN112343360B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474077B1 (en) * | 2004-10-08 | 2005-03-14 | (주)한림종합건축사사무소 | Protection box for exposed steel reinforcing for reinforced concrete construction and the method using the same |
| CN105064579A (en) * | 2015-09-01 | 2015-11-18 | 江苏兴厦建设工程集团有限公司 | Construction method guaranteeing pouring formation of toilet water-stop ridge platform |
| CN207268090U (en) * | 2017-08-31 | 2018-04-24 | 上海建工七建集团有限公司 | Reserved joint bar protective device |
| CN211472582U (en) * | 2019-12-20 | 2020-09-11 | 广州珠江建设发展有限公司 | Construction lane waterproof construction after anti-bank of subway upper cover movement joint breaks away |
| CN211714635U (en) * | 2019-12-27 | 2020-10-20 | 中铁第一勘察设计院集团有限公司 | Closed concrete protection structure of vertical member reserved steel bar is opened to upper cover |
| CN111648628A (en) * | 2020-04-30 | 2020-09-11 | 成都建工集团有限公司 | Construction method for upper cover building of subway parking garage |
Non-Patent Citations (1)
| Title |
|---|
| 林建好等: "《土木工程材料 （第二版）》", 31 August 2017, 哈尔滨工程大学出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112343360B (en) | 2022-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103015719B (en) | Preliminary work for spudding steel concrete wastewater disposal basin monobloc cast technique | |
| CN207499403U (en) | A kind of FS composite thermal-insulating exterior formworks system | |
| CN112412027A (en) | Method for manufacturing large-section special-shaped load-bearing concrete bare concrete member | |
| CN209723052U (en) | The prefabricated plate advanced water-stopping of poured band of outer wall of basement backfills structure | |
| CN111042570B (en) | Repairing construction method for fresh water brick wall of ancient building | |
| CN106869166A (en) | A kind of fabricated construction method for pipe gallery | |
| CN112227759B (en) | Repair, reinforcement and migration method for historic building clean water wall | |
| CN109208632A (en) | A kind of precast hollow module block type concrete retaining wall | |
| CN105780976A (en) | Compound concrete shear wall structure and concrete pouring method thereof | |
| CN106978823A (en) | Outer wall of basement advanced water-stop post-pouring zone construction method | |
| CN114016552A (en) | Pre-sealing construction method for basement roof settlement post-cast strip | |
| CN112343360B (en) | Protection method for reserved structure of upper cover plate of TOD (time of day) subway | |
| CN110924434A (en) | UHPC (ultra high performance polycarbonate) fabricated tunnel open cut tunnel lining structure and construction method | |
| CN109441110A (en) | A kind of basement shear wall post-cast strip precast outer die construction method | |
| CN112761158B (en) | Green construction method of integral three-wall-in-one outer wall of reverse engineering steel concrete key pin meshed row pile | |
| CN213806678U (en) | TOD subway upper cover plate reserved structure's protection architecture | |
| CN209066480U (en) | A kind of precast hollow module block type concrete retaining wall | |
| CN114059414A (en) | Overhead superposed type tunnel structure suitable for frozen soil area and construction method | |
| CN100395416C (en) | Energy-saving architecture external enclosing and protective structure composite heat preservation wall | |
| CN103397661A (en) | Construction technology of underground combined profile steel-concrete outer wall structure | |
| CN206768879U (en) | A kind of poured band of outer wall of basement structure | |
| CN113622408A (en) | Construction method for replacing embedded steel bars with split bolts of two-in-one type ground wall single-side formwork | |
| CN112983039A (en) | Construction method for integral dismantling protection of reserved vertical face of historical building | |
| CN110552546A (en) | method for building underground parking lot waterproof facility by using tower crane | |
| CN213898201U (en) | Horizontal post-cast strip protection and maintenance integrated structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |