CN101994392A - Large-volume concrete fast pouring and temperature control method - Google Patents
Large-volume concrete fast pouring and temperature control method Download PDFInfo
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- CN101994392A CN101994392A CN 201010532688 CN201010532688A CN101994392A CN 101994392 A CN101994392 A CN 101994392A CN 201010532688 CN201010532688 CN 201010532688 CN 201010532688 A CN201010532688 A CN 201010532688A CN 101994392 A CN101994392 A CN 101994392A
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Abstract
The invention discloses a large-volume concrete fast pouring and temperature control method which comprises the steps of (1) water pipe cooling and (2) surface thermal insulation. The method can lead the thickness of a pouring layer to break through 3m and lead the pouring interim period to be less than 5 days through the method of changing the material of a water pipe, the diameter of the water pipe, the thickness of the pipe wall, the spacing interval of the water pipe, the position of the water pipe, the length of the water pipe, water temperature at an inlet, flow rate of cooling water, water supply time and water flow direction during the water pipe cooling measure, and the corresponding surface thermal insulation method for assistance, thereby realizing fast pouring of large-volume concrete and simultaneously effectively preventing cracks. The method can be used for the large-volume concrete fast construction in civil and hydraulic engineering.
Description
Technical field
The present invention relates to building fast and the temperature control method of a kind of concrete in mass, belong to the technical field of concreting and temperature control method.
Background technology
The crack usually appears after the mass concrete construction at present, as dam, anchorage, bridge pier etc., temperature load is the major reason that causes the concrete in mass cracking, and therefore the temperature control of Concrete Construction phase is a most important content of design and construction in this type of engineering.Temperature control means commonly used at present can be summarized as four aspects: temperature, water pipe cooling, the heat radiation of storehouse face and surface heat preservation are built in control.The measure of these several aspects is comprehensive to be used preventing that the crack from having tangible effect, but the crack of concrete in mass still often occurs, and influences the normal construction progress and the safe operation of engineering.It is reasonable inadequately that chief reason is present in the combination of these measures, such as water pipe arrange too uncommonly dredge, coolant water temperature is higher, the thickness and the temperature retention time of surface heat preservation material are unreasonable, too rely on storehouse face heat radiation or the like.In order to guarantee the construction quality of concrete in mass, and accelerate to build progress, can carry out some improvement from the temperature control means aspect of construction period.
Aspect the theoretical research of casting of concrete in mass piece thickness, domestic Zhu Baifang once did special discussion to height of lift height pattern, propose some and be simple and easy to use formula, some relations of building between bed thickness and the pour temperature have been calculated, and the critical rate of climb notion of proposition LIFT, for engineers and technicians provide concisely reference easily.Designing institute of Yangtze River Water Conservancy Commission is for guaranteeing first unit generation target of Three Gorges Dam in 2003, once from concrete temperature control angle the spiral case second stage concrete was built bed thickness research, propose rational temperature control measures, under the prerequisite that satisfies the construction quality requirement, suitably strengthened and built bed thickness.The scientific worker of Three Gorges Projects also builds bed thickness to dam unconfinement district employing 3.0m and has carried out Calculation and Study.The researcher of two beach arch dam engineerings also proposes height of lift height pattern and changes the scheme of 3.0m into by 1.5m on the basis of having calculated thermal stresses, the scheme of facts have proved is successful." job practices of temperature controlled anticracking in the concreting " that Sinohydro Bureau 4 Co., Ltd. finishes applied for national inventing patent: this technical research is set up and perfect control of concrete in mass temperature and construction layer intermittent phase early warning pre-control system, and the concrete in mass temperature of each link in constructing is controlled within the early warning pre-control bottom line; Adopt efficient retardation water reducing agent, optimization concrete in mass match ratio to wait and control the inner early stage temperature of concrete in mass; Adopt the back to paste comprehensive technologys such as heat insulating material to the permanent exposed face of dam concrete in mass, fundamentally guaranteed the permanent face of dam body, the insulation of long pause face, moistening effect.This patent has realized under the hot conditions that concrete in mass 3.0m builds bed thickness and temperature controlled anticracking is respond well.Now to dam unconfinement district concrete, 3.0m builds the measure that bed thickness has been a routine.But this bed thickness is compared with foreign level and is still had very big gap, and further improved space is arranged.
According to practical experience and computational analysis, at home and abroad in the concrete dam of the decades construction recently, concreting bed thickness and intermittent phase are two bottlenecks of restriction speed of application.Concrete dam pouring layer thickness at present commonly used generally is 1.5m～2.0m in the strong constraint district, generally is 2.0m～3.0m at weak confining region and unconfinement district, surpass 3.0m to build bed thickness domestic rarely found.The LIFT intermittent phase commonly used at present is about 7d, and generally at 5d～10d, the intermittent phase that the small part LIFT is also arranged is at 20d～30d.Adopting the following free-revving engine of building the above intermittent phase of bed thickness and 5d of 3m is in order to allow concrete distribute a part of heat in the intermittent phase, thereby reaches the effect that reduces internal temperature.Generally speaking, the concrete dam that 100m is high, the basic constraint district will be divided into 10 LIFT at least, the concrete in unconfinement district, basis will be divided into 27 LIFT at least, amount at least 37 LIFT, each LIFT is built about 1d of time, and the intermittent phase presses average and calculates about 7d.If disregard the influence of other factors, the concreting of a riverbed monolith needs 10 months at least to dam crest.In the middle of present actual engineering, each monolith is alternately upwards, consider concrete production capacity and transport capacity simultaneously, and the influence of other operation, such as grouting, water conservancy diversion etc., the high concrete dam major project of 100m generally needs 20 months～40 months, if monolith is more, the time that then needs is longer.And plan at present and design in some concrete dams reach 200m～300m level height, for this class high dam, LIFT is more, operation and factor that need to coordinate are also more, therefore build bed thickness and intermittent phase length is more remarkable to the influence of whole construction progress.And, adopting the less intermittent phase of building bed thickness and growing to dispel the heat according to actual conditions, concrete dam still has a lot of cracks to occur.As seen, present temperature control method has the further improvements of being worth.
In fact, the thick LIFT that surpasses 3m, such as 6m, 9m, even tens meters, historical stage in China's Great Leap Forward once implemented in indivedual concrete dam constructions, but temperature controlled anticracking calculated level at that time and enforcement means can't satisfy engineering request, and therefore quick casting method is at that time implemented the more crack of concrete appearance, back, can't reach quality control requirement.After this, domesticly all the time 3m built intermittent phase about bed thickness and 7d as the mode of building commonly used.Adopting the more country of thick LIFT in the world mainly is Canada, and the history enlightening Ward of this state is tieed up sharp gravity dam, and high 65m adopts logical storehouse thick-layer to build, and build bed thickness is 12～15m at every turn; Draw the leaf gravity dam, high 72m, logical storehouse thick-layer is built, and build bed thickness is 19.5m at every turn.As seen leading over China aspect the rapid construction of concrete dam abroad.
The precision that is limited to the algorithm of water pipe cooling in the past, previous finding, patent are familiar with deep not enough to the effect of water pipe cooling, it is 3.0m that the maximum of using always in the actual engineering is built bed thickness, water pipe in the concreting piece arranges that often spacing is bigger, generally be 2.5m～3.0m, except spacing, the other factors that influences cooling effect is not fully optimized yet.
Summary of the invention
The present invention seeks to provides building fast of a kind of concrete in mass and temperature control method at the defective that prior art exists.
The present invention adopts following technical scheme for achieving the above object:
Concrete in mass of the present invention build fast and the temperature control method comprises the steps:
(1) water pipe cooling: build in the process, lay HDPE pipe or metallic water pipe, described bore 25mm～45mm, described pipe layout pattern adopts vertical distance and horizontal range at 1.0m～1.5m; Arrange according to the left and right banks direction in the dam body layer; Coolant water temperature uses 8.0 ℃～20.0 ℃, and the flow of cooling water is 0.5m
3/ h～6.0m
3/ h; Beginning is at the water flowing time: if temperature of concrete during construction is higher than the water temperature in the pipe, then just begin water flowing pouring concrete the time; If temperature of concrete during construction is lower than coolant water temperature in the pipe, just begin water flowing when then the temperature rise of temperature of concrete during construction by the time reaches water temperature in the pipe after the concreting; After water flowing begins, change the water flowing direction one time every 0.5d～2.0d, wherein d represents the sky, down together;
(2) surface heat preservation: concreting finishes form removal behind 5d～30d, and the outer thick plastic foamboard of 1～5cm that pastes of dam body template is incubated, and lift surface adopts one deck dam insulation quilt to be incubated simultaneously.
Preferably, described pipe layout pattern adopts vertical distance and horizontal range at 1.0m～1.5m.
Preferably, the flow of cooling water is 0.5m
3/ h～6.0m
3/ h.
The present invention utilizes thick-layer to build the mode of layer and water pipe heat radiation, main by strengthening and optimize the effect of water pipe cooling, heat in the concrete is in time derived, thereby reach better temperature control effect, also can realize the quick casting method of thick LIFT and short intermittent phase simultaneously.Changed in the past that the thin layer long pause is built the inside concrete that is brought and intermittently the face tensile stress is big, the shortcoming of the length consuming time of constructing.
Under the reasonable combination of above-mentioned these water pipe cooling factors of the present invention, be aided with corresponding surface heat preservation measure again, can realize concreting bed thickness and the combination of building the intermittent phase arbitrarily, can expand to building the intermittent phase of thick LIFT of 6m and 5d such as the present mode of building, even bigger building bed thickness and littler intermittent phase, thereby the quickening speed of application, and realize the anti-cracking concrete requirement.Adopt rational water pipe cooling and surface heat preservation measure, can also relax the requirement of building temperature.Under the requirement that reaches identical temperature control target, reduce and build the wasteful a lot of of temperature ratio reinforcement water pipe cooling, therefore, the method that proposes among the present invention can also obvious saving construction cost.
The specific embodiment
The present invention arranges by rational water pipe various concrete in masss is realized building fast, and realizes the anticracking target.According to different concrete electrothermal calefactive rate and calorific values, cooling water pipe can select to adopt plastic pipe or iron pipe.According to the cooling water flow requirement, the water pipe internal diameter can be chosen in 25mm～45mm scope.According to tube wall hydraulic pressure that can bear and the cooling effect that is produced, pipe thickness can be chosen between 1.5mm～5.0mm.According to different bed thickness and the concrete thermal properties of building, water pipe should be between 1.0m～1.5m at the arrangement pitch of vertical direction and horizontal direction.According to the concrete tensile stress size of zones of different, arrange the particular location of water pipe.According to the amplitude of variation of water pipe along Cheng Shuiwen, the length of water pipe is generally got 100m～300m.According to cooling the concrete temperature peak value that should reach require and peak value after the requirement of temperature decrease speed, the inlet water temperature of cooling water generally can be got 8.0 ℃～20.0 ℃, simultaneously, the inlet temperature of cooling water also is correlated with different supplying pipe and water pipe layout density.For the ease of the optimal control of cooling procedure, the flow of cooling water should be adjusted at different cooling stages, generally at 0.5m
3/ h～6.0m
3/ h, this factor also is closely-related with inlet water temperature.According to concrete heating perdurabgility, the time span of water flowing cooling is generally in 7.0d～28d scope.According to the cooling uniformity requirement of concrete different phase, the variation of water (flow) direction generally is controlled in 0.5d～2.0d scope.
The present invention specifically is the method by the position of the spacing of the water pipe material in the change water pipe cooling provision, water pipe diameter, pipe thickness, water pipe, water pipe, length of pipe, inlet water temperature, cooling water flow, water flowing time, water (flow) direction, and be aided with corresponding surface heat preservation method, can make and build 3 meters of bed thickness breakthroughs, building the intermittent phase is shorter than 5 days, thereby realize building fast of concrete in mass, effectively prevent the appearance in crack simultaneously.
Embodiment 1:In Guangdong Province's concrete dam engineering, a plurality of pours adopt the bed thickness of building of 6m, and under local hot conditions, decontrol the restriction of building temperature.The concrete method of implementing is as follows in the construction: the cooling of (1) water pipe: build in the process, lay pvc pipe, water pipe internal diameter 28mm, water pipe layout pattern adopt vertically distance * horizontal range=1.50 * 1.00m.(elevation 243.0m is following) water pipe arranges that according to the left and right banks direction normal concrete of water flow passage above (more than the elevation 243.0m) is arranged according to the upstream and downstream direction in the dam body layer.Water pipe will guarantee that water pipe has the distance of 0.5m～0.8 from the dam body surface when arranging.Coolant water temperature uses 22.0 ℃, and the water flowing flow is 25L/min, and the water flowing time is 20d.The principle of beginning water flowing selection of time is: if temperature of concrete during construction is higher than water temperature in the pipe, then just begin water flowing pouring concrete the time; If build temperature and be lower than coolant water temperature, just begin water flowing when then its temperature rise by the time reaches water temperature in the water pipe after the concreting.After water flowing begins, change the water flowing direction one time every 1d.After water flowing begins, change the water flowing direction one time every 1d.(2) surface heat preservation: form removal behind the intact 5d of concreting, be incubated with the thick plastic foamboard of 2cm around the dam body when building, lift surface also will adopt one deck geomembrane to be incubated simultaneously.For the normal concrete on runner top, in the zone of elevation 243.0m～248.5m, built form removal again behind the 15d, during this period, insulation is proceeded on the surface.The above regional normal concrete of elevation 248.5m is still according to having built 5d time form removal, insulation when building.The present invention has not only built a high grade project through employing, and completion half a year and generating in advance, obtains huge economic benefit
Embodiment 2:In the concrete dam engineering of Sichuan, be positioned at the 13# riverbed monolith in basic strong constraint district, long 152m, wide 20m adopts the present invention to carry out building of 6m bed thickness.The temperature control method of building fast that adopts in the construction is specific as follows: the cooling of (1) water pipe: adopt the HDPE pipe, diameter is 2.8cm, water pipe vertical spacing * level interval is 1.5m * 1.5m, and the superiors' water pipe is apart from storehouse face 0.6m, and water pipe is apart from upstream and downstream face horizontal range 0.5～1.0m.10 ℃ of inlet water temperatures, water flowing 28d.Initial water flowing flow velocity 1.2m/s.Flow velocity is kept to 0.6m/s behind the water flowing 14d.Every other day change the water flowing direction one time.(2) surface heat preservation: cover the thick dam insulation quilt of 2.0cm up to upper strata concreting at concrete storehouse surface, outside the concrete side steel form, paste the dam insulation quilt (after the form removal) of thick polyethylene benzene plate (before the form removal) of 3.0cm and covering 2.0cm.(3) build temperature: put in storage naturally (build temperature and be about daily mean temperature and add 3 ℃, and the highest temperature of building is no more than 18 ℃).Adopt said method to build and not only successfully realized building fast in the single monolith uphill process, that has realized also that three monoliths rise simultaneously builds fast, and these concrete of building fast do not see that so far the crack takes place.
Claims (3)
1. building fast and the temperature control method of a concrete in mass is characterized in that comprising the steps:
(1) water pipe cooling: build in the process, lay HDPE pipe or metallic water pipe, described bore 25mm～45mm, described pipe layout pattern adopts vertical distance and horizontal range at 1.0m～1.5m; Arrange according to the left and right banks direction in the dam body layer; Coolant water temperature uses 8.0 ℃～20.0 ℃, and the flow of cooling water is 0.5m
3/ h～6.0m
3/ h; Beginning is at the water flowing time: if temperature of concrete during construction is higher than the water temperature in the pipe, then just begin water flowing pouring concrete the time; If temperature of concrete during construction is lower than coolant water temperature in the pipe, just begin water flowing when then the temperature rise of temperature of concrete during construction by the time reaches water temperature in the pipe after the concreting; After water flowing begins, change the water flowing direction one time every 0.5d～2.0d, wherein d represents the sky, down together;
(2) surface heat preservation: concreting finishes form removal behind 5d～30d, and the outer thick plastic foamboard of 1～5cm that pastes of dam body template is incubated, and lift surface adopts one deck dam insulation quilt to be incubated simultaneously.
2. building fast and the temperature control method of concrete in mass according to claim 1, the layout density that it is characterized in that described cooling water pipe is 1.0m～1.5m, and coolant water temperature uses 8.0 ℃～20.0 ℃, and the flow of cooling water is 0.5m
3/ h～6.0m
3/ h.
3. building fast and the temperature control method of concrete in mass according to claim 1, the time span that it is characterized in that described logical cooling water is in 7.0d～28d scope.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134911A (en) * | 2011-04-27 | 2011-07-27 | 河海大学 | Method for calculating mass concrete water pipe cooling temperature field |
| CN102561353A (en) * | 2011-11-15 | 2012-07-11 | 中国水利水电第七工程局有限公司 | Overall concreting method for thin impact-resistant wear-resisting bottom slab |
| CN103485542A (en) * | 2013-09-25 | 2014-01-01 | 中铁大桥局股份有限公司 | System and method for measuring and controlling hydration heat in mass concrete |
| CN103669356A (en) * | 2013-11-13 | 2014-03-26 | 雅砻江流域水电开发有限公司 | Large-sized normal concrete thick layer pouring method |
| CN104018673A (en) * | 2013-09-12 | 2014-09-03 | 江苏绘天建筑安装工程有限公司 | Extra-huge-volume concrete one-time continuous pouring multi-cycle real-time temperature control construction technology |
| CN104074171A (en) * | 2014-06-30 | 2014-10-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Heat preservation quilt for cold winter concrete dam and mounting method and device thereof |
| CN104110008A (en) * | 2014-07-02 | 2014-10-22 | 三峡大学 | Method for fast regulating and controlling water passing in middle and later stage of concrete dam |
| CN104631461A (en) * | 2015-01-16 | 2015-05-20 | 长江勘测规划设计研究有限责任公司 | Improved method for construction of reserved slot at downstream dam surface for cooling pipe installation |
| CN106844810A (en) * | 2015-12-07 | 2017-06-13 | 北京市政建设集团有限责任公司 | A kind of round platform water conservancy project structure inner template method for determining size |
| CN107447763A (en) * | 2017-09-12 | 2017-12-08 | 中水北方勘测设计研究有限责任公司 | One kind prevents concrete dam rapid constructing method in severe cold area caused by crack |
| CN107905232A (en) * | 2017-11-03 | 2018-04-13 | 山东水总有限公司 | A kind of tide-block sluice gate pier mass concrete water flowing cooling construction method and device |
| CN108104126A (en) * | 2017-11-03 | 2018-06-01 | 湖北宣鹤高速公路有限公司 | The anti-seam temperature control casting method and structure of sole plate mass concrete |
| CN110206314A (en) * | 2019-05-23 | 2019-09-06 | 贵州省公路工程集团有限公司 | Concrete heat dissipation PVC pipe laying structure and concrete pouring construction method |
| CN110700587A (en) * | 2017-11-21 | 2020-01-17 | 钟炽昌 | Method for quickly eliminating infrared rays in constructional engineering to accelerate construction speed and ensure engineering quality |
| CN112065631A (en) * | 2020-08-17 | 2020-12-11 | 安徽金寨抽水蓄能有限公司 | Volute layer construction process |
| CN113202317A (en) * | 2021-04-30 | 2021-08-03 | 中国水利水电第四工程局有限公司 | Construction and maintenance method for subtropical large-volume concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701495A (en) * | 2009-09-28 | 2010-05-05 | 中国葛洲坝集团股份有限公司 | Individualized circulation method for temperature control of bulk concrete |
-
2010
- 2010-11-05 CN CN 201010532688 patent/CN101994392A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701495A (en) * | 2009-09-28 | 2010-05-05 | 中国葛洲坝集团股份有限公司 | Individualized circulation method for temperature control of bulk concrete |
Non-Patent Citations (4)
| Title |
|---|
| 《2004全国RCCD筑坝技术交流会议论文集》 20041031 朱岳明，林志祥 水管冷却混凝土温度场求解与应用 , 2 * |
| 《水利建设与管理》 20071231 张勇，朱岳明，张杨，强晟 岩基上大型水闸冬季施工温控防裂方法研究 , 第8期 2 * |
| 《水力发电》 20060331 刘有志, 朱岳明, 刘桂友, 徐建荣, 何明杰 高拱坝一期冷却工作时间优选方案研究 第32卷, 第3期 2 * |
| 《红水河》 20061231 刘桂友，朱岳明 大体积混凝土冷却水管布置方案研究 第25卷, 第1期 2 * |
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| CN102134911B (en) * | 2011-04-27 | 2012-05-09 | 河海大学 | Method for calculating mass concrete water pipe cooling temperature field |
| CN102134911A (en) * | 2011-04-27 | 2011-07-27 | 河海大学 | Method for calculating mass concrete water pipe cooling temperature field |
| CN102561353A (en) * | 2011-11-15 | 2012-07-11 | 中国水利水电第七工程局有限公司 | Overall concreting method for thin impact-resistant wear-resisting bottom slab |
| CN104018673A (en) * | 2013-09-12 | 2014-09-03 | 江苏绘天建筑安装工程有限公司 | Extra-huge-volume concrete one-time continuous pouring multi-cycle real-time temperature control construction technology |
| CN103485542A (en) * | 2013-09-25 | 2014-01-01 | 中铁大桥局股份有限公司 | System and method for measuring and controlling hydration heat in mass concrete |
| CN103669356B (en) * | 2013-11-13 | 2015-10-28 | 雅砻江流域水电开发有限公司 | Large volume normal concrete thick layer casting method |
| CN103669356A (en) * | 2013-11-13 | 2014-03-26 | 雅砻江流域水电开发有限公司 | Large-sized normal concrete thick layer pouring method |
| CN104074171A (en) * | 2014-06-30 | 2014-10-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Heat preservation quilt for cold winter concrete dam and mounting method and device thereof |
| CN104110008B (en) * | 2014-07-02 | 2016-06-15 | 三峡大学 | A kind of method quickly regulated and controled for concrete dam middle and late stage water flowing |
| CN104110008A (en) * | 2014-07-02 | 2014-10-22 | 三峡大学 | Method for fast regulating and controlling water passing in middle and later stage of concrete dam |
| CN104631461A (en) * | 2015-01-16 | 2015-05-20 | 长江勘测规划设计研究有限责任公司 | Improved method for construction of reserved slot at downstream dam surface for cooling pipe installation |
| CN106844810B (en) * | 2015-12-07 | 2020-05-19 | 北京市政建设集团有限责任公司 | Method for determining size of inner template of circular truncated cone hydraulic structure |
| CN106844810A (en) * | 2015-12-07 | 2017-06-13 | 北京市政建设集团有限责任公司 | A kind of round platform water conservancy project structure inner template method for determining size |
| CN107447763A (en) * | 2017-09-12 | 2017-12-08 | 中水北方勘测设计研究有限责任公司 | One kind prevents concrete dam rapid constructing method in severe cold area caused by crack |
| CN107447763B (en) * | 2017-09-12 | 2019-06-11 | 中水北方勘测设计研究有限责任公司 | A kind of severe cold area concrete dam rapid constructing method for preventing crack from generating |
| CN108104126A (en) * | 2017-11-03 | 2018-06-01 | 湖北宣鹤高速公路有限公司 | The anti-seam temperature control casting method and structure of sole plate mass concrete |
| CN107905232A (en) * | 2017-11-03 | 2018-04-13 | 山东水总有限公司 | A kind of tide-block sluice gate pier mass concrete water flowing cooling construction method and device |
| CN110700587A (en) * | 2017-11-21 | 2020-01-17 | 钟炽昌 | Method for quickly eliminating infrared rays in constructional engineering to accelerate construction speed and ensure engineering quality |
| CN110206314A (en) * | 2019-05-23 | 2019-09-06 | 贵州省公路工程集团有限公司 | Concrete heat dissipation PVC pipe laying structure and concrete pouring construction method |
| CN112065631A (en) * | 2020-08-17 | 2020-12-11 | 安徽金寨抽水蓄能有限公司 | Volute layer construction process |
| CN113202317A (en) * | 2021-04-30 | 2021-08-03 | 中国水利水电第四工程局有限公司 | Construction and maintenance method for subtropical large-volume concrete |
| CN113202317B (en) * | 2021-04-30 | 2021-10-22 | 中国水利水电第四工程局有限公司 | Construction and maintenance method for subtropical large-volume concrete |
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