CN101289859A - Pouring process for dock entrance large concrete in water foundation ditch - Google Patents
Pouring process for dock entrance large concrete in water foundation ditch Download PDFInfo
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- CN101289859A CN101289859A CNA2008100357901A CN200810035790A CN101289859A CN 101289859 A CN101289859 A CN 101289859A CN A2008100357901 A CNA2008100357901 A CN A2008100357901A CN 200810035790 A CN200810035790 A CN 200810035790A CN 101289859 A CN101289859 A CN 101289859A
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Abstract
The invention relates to a casting process for large-volume concrete, in particular to a casting process for large-volume concrete of a dock entrance of a foundation pit in water area. The casting process for the large-volume concrete of the dock entrance of the foundation pit in water area is characterized in that: the plane of a bottom slab is divided into a plurality of sections, the height of the bottom slab is divided into a plurality of layers, and the orderly casting is performed. The casting process has the advantages that: the casting process is more convenient in construction, and more time-saving and labor-saving.
Description
Technical field
The present invention relates to the pouring technology of prevention of mass concrete, particularly the pouring technology of the prevention of mass concrete of dock entrance in the foundation ditch in water.
Background technology
Prevention of mass concrete be meant the entity minimum dimension of concrete works or structure section minimum thickness 1m and more than, or the expectation meeting causes the concrete in crack because of hydration heat of cement causes concrete internal-external temperature difference excessive (〉=25 ℃), all genus prevention of mass concrete all have some common features: structure is abundant, the concrete amount is big, the engineering specifications complexity, the construction technical requirement height; Hydration heat of cement makes structure produce temperature and shrinkage strain.
Summary of the invention
The objective of the invention is to propose a kind of pouring technology of dock entrance large concrete in water foundation ditch, inconvenient to solve construction, the problem that wastes time and energy.
The pouring technology of dock entrance large concrete in water foundation ditch is characterized in that: divide the section of pluralizing on the base plate plane, the base plate short transverse is divided into plural layer, successively cast.
Further, be divided into A, B, C, D section on the base plate plane, wherein A, B section are positioned at the docking block side of dock entrance, and the C section is positioned between A section and the B section, and the D section is positioned between A section and the C section, between B section and the C section; Cast A section, B section are poured into a mould the C section then earlier; Cast D section after A section, B section, C section reach designing requirement intensity.
The invention has the advantages that: it is more convenient, more time saving and energy saving to construct.
Description of drawings
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the sectional view of the foundation ditch in water described in the specific embodiment.
Fig. 2 is the vertical view of the base plate of the 1# dock dock entrance described in the specific embodiment.
Fig. 3 is the vertical view of the base plate of the 2# dock dock entrance described in the specific embodiment.
Fig. 4 is a dock entrance bottom board concrete pouring in vertically clamped moulds interface.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with the specific embodiment, further set forth the present invention.
Two Large Ship Dock, scale are respectively 1# dock 520m * 76m * 11.5m, 2# dock 510m * 116m * 11.5m.The dock entrance of two docks has adopted design, the construction technical schemes of novel above-water large-scale foundation pit enclosure structure, and is totally independent of waterborne.
The dock entrance construction has been adopted steel sheet pile 11 to add and has been supported 2 above-water large-scale vertical type foundation pit enclosure structures, and wherein 1# depressed place dock entrance foundation ditch planar dimension is that 98m * 28m, 2# depressed place dock entrance foundation ditch planar dimension are 128m * 28m.
(1) enclosure wall structure
Dock entrance excavation of foundation pit face absolute altitude is-10.65m, and design high-water be+4.13m under the normal condition of the enclosure wall outside, and the excavation of foundation pit degree of depth is about 15m, adopts steel sheet pile 11 to make enclosure wall, in establish the support of 5 roads and enclose the purlin system.
Enclosure wall adopts PU32 steel sheet pile 11, the long 31m of stake, its top mark height+3.65m, end absolute altitude-27.35m.In order to strengthen the stability of stagnant water effect and wind and wave resistance, enclosure wall peripheral distance 3m in the outside and thing both sides has added the long PU16 steel sheet pile 12 of a row 16m, steel sheet pile 11, steel sheet pile 12 fuse backfill sand between two row's sheet piles by the collar tie beam at the top wave wall 3 of holding concurrently.
Because whole foundation ditch system is seated on outer domatic under water of existing embankment, in order to keep the whole balance of going along with sb. to guard him system periphery load, take in the dock entrance medial and lateral by cutting the slope unloading and throwing the measure of dosing pressure mud face 5 absolute altitudes of enclosure wall outer periphery to be consistent respectively.
(2) support the purlin system of enclosing
Support arrangement adopts the north-south that support is added the scheme of angle brace, and main support interval is generally 7.5m, and a plane frame is set every about 30m, wherein:
(double as wave wall top mark height+6.50m) and centre of support absolute altitude+3.65m adopt reinforced concrete structure to guarantee the rigidity at top to the first road collar tie beam 3, support section yardstick 800mm * 800mm, the connecting rod yardstick is 800mm * 600mm;
Second road supports 22 center absolute altitude-0.35m, encloses purlin and supports H700 * 300 shaped steel that all adopt Two bors d's oeuveres, and connecting rod and bridging adopt H700 * 300 shaped steel.
The 3rd road supports 23 center absolute altitude-3.35m, adopts steel to enclose purlin, steel support.
The 4th road supports 24 center absolute altitude-6.15m, adopts steel to enclose purlin, steel support.
The 5th road supports 25 center absolute altitude-8.65m, adopts steel to enclose purlin, steel support.
(3) column and stand column pile
Every support divided into three root posts 4, about the about 7.5m of spacing.
Column 4 adopts Φ 700 * 14 steel pipes, and stand column pile is all utilized dock entrance main structural engineering Φ 800PHC stake, column 4 is welded on the preformed pile top and preformed pile is beaten to design elevation by pile driving barge together.
Dock entrance agent structure in the foundation ditch
The dock entrance agent structure adopts the cast-in-place large volume reinforced concrete structure of " U " monolithic on the pile foundation, and concrete strength grade is selected C30 for use.
Docking block top mark height+4.80m, dock entrance base plate face design elevation-6.80m; Dock gate adopts ship caisson, and gate seat is shelved face absolute altitude-7.00m, threshold absolute altitude-6.00m.
The dock entrance longitudinal length is 28m, and the vertical ecto-entad of base plate is divided into 12.5 meters of length of gate seat section (linking to each other with the riverbed face), threshold section 6.0m, door inner segment 9.5m respectively, by the thick granite fringing of doorframe periphery employing 50cm of dock gate; The dock entrance transverse width is respectively 98m, 128m, and the docking block width 10m of thing both sides wherein, the docking block between two depressed places consider and arrange 600T straddle truck track that width is 12m; The dock entrance base plate thickness is that 3.50m～4.50m, end absolute altitude are-10.50m.
The dock entrance pile foundation adopts Φ 800PHC * 38000mm pile for prestressed pipe (Type B stake), and pilespacing is 2.65m under docking block, is about 3.75m under base plate, and the sharp absolute altitude of stake is-48.40m.
Three limits of base plate forward position, dock entrance base plate lower edge and both sides are provided with the high-pressure rotary-spray pile water stopping curtain of sealing, and curtain top mark height-10.45m, end absolute altitude are-26.00m that the rotary churning pile specification is 2 rows, array pitch 0.8m, pitch-row 0.8m, quincuncial arrangement.
The foundation ditch inboard is dock chamber, runway and the pump house structure of dock; The foundation ditch both sides are the revetment structure; Be little cofferdam structure between two foundation ditches.
The dock entrance base plate is a prevention of mass concrete, the technology of taking staged and layered to build.
Be divided into A, B, C, D section on the base plate plane, shown in Fig. 2,3, segmentation is constructed, and builds earlier to be positioned at docking block side A section, B section, the C section in the middle of building then; Reach designing requirement intensity after-pouring ater-casting D section in A section, B section, C section.
The base plate short transverse is divided pour concrete three times: cast for the first time mainly determines that according to the absolute altitude that dock entrance the 4th road supports wherein gate seat section base plate waters to end face-7.0m absolute altitude; Door inner segment base plate waters to end face-6.8m absolute altitude; Loweing and water to-7.4m absolute altitude in threshold section part, makes the threshold concrete stressed more reasonable; Lower and water to-7.4m in gate pier position also part.For the second time pour into a mould the threshold position to end face-6.0m absolute altitude; The gate pier place considers the absolute altitude that the 3rd road supports, and is adjusted to-the 4.7m absolute altitude by original being poured into-5.7m.After finishing, pours into a mould the granite veneer the second stage of concrete of granite side for the third time.Dock entrance bottom board concrete pouring in vertically clamped moulds boundary is met personally shown in Figure 4.
Concrete raw material
The dock entrance structural concrete adopts commercial concrete, considers that the dock entrance base plate is a prevention of mass concrete, is not influencing under the concrete durability, should reduce cement consumption as far as possible, strengthens the volume of flyash, and than choosing, the dock entrance bottom board concrete adopts following match ratio through match ratio:
Cement, flyash water sandstone Admixture
300 80 180 783 1057 5.7
Through Mix Ratio Test, intensity reaches more than the C30, the impervious designing requirement that reaches P8.Be not less than 45s in strict accordance with mixing time in work progress, slump reaches requirement, and the initial setting time is not less than 12h, and final setting time is not more than 24h by standard, and concrete tank and pump truck forbid arbitrarily to add water on the way.Sand adopts medium coarse sand (fineness modulus 2.7～3.0), and building stones adopt 5～25 the even building stones of grating, and sandstone material mud content is not more than code requirement.
Pump truck and pump line are laid
4 pump trucks are arranged in concrete pouring, 2 of standby pump trucks, and plan cast intensity is 120m
3/ h, the monolithic 35h duration of pouring.Calculate according to cast intensity and distance, every pump truck is by 5 tank car supply concrete.It is inside and outside that pump truck is arranged in the land-based area embankment respectively, carries out the place at respective regions and handle, to satisfy the laying and the transportation of 4 pump trucks and corresponding tank car.
After pump line picks out from pump truck, arrive the first road concrete along trestle and support, reach the 4th road downwards and support, support strut and connecting rod then along the 4th road and extend horizontally to the pour point top, more vertically downward, connect rubber tube and go deep into below the top layer reinforcing bar by bend pipe.The top layer reinforcing bar will cut off the reinforcing bar welding in concrete pouring at the pour point opening square hole to enough height.
Concrete pouring technology
Ash take to fix a point down ash, tiltedly layer pouring technology under the concrete.The work of closing a position in the time of will performing down ash during concrete pouring is forbidden to replace closing a position to vibrate.To in time vibrate behind the ash under the concrete." fast inserting the pulled out slowly " principle of vibrating and follow is grasped the appropriate time, should fully vibrate, and can not cross again and shake, and vibrates to guarantee to vibrate a little density.The operation of under facing concrete, closing a position at once behind the ash, the following ash about 6h～7h in back carries out receiving the first time light operation, and initial set carries out receiving the second time light during to final set.
Concrete thermometric and maintenance
The maintenance of concrete in mass will be carried out according to concrete internal and external temperature information.We carry out thermometric to piecemeal at plan in this engineering.Before concrete pouring, give and imbed thermometer, to the temperature survey after the concrete pouring, and according to measured result adjustment maintenance.
Thermometer is arranged 8 points, and 1,2,3 and 1,5,6 and 1,7,8 measure the variations in temperature of concrete along the space both direction respectively, and 1 is the concrete central temperature, and 3,6,8 is surface temperature of concrete, and 4 is atmospheric temperature.
Thermometer is made up of inductor and tester, before concrete pouring, utilizes adhesive tape that inductor is fixed on the reinforcing bar in each relevant position, draws and concentrates after the numbering that will go between.Promptly begin to measure the data of 8 points for measuring temperature after two hours after concrete pouring is finished, determine measuring frequency according to range of temperature, and achievement is organized into numerical table.
Concrete adopts " heat and moisture preserving maintaining process " to carry out maintenance: plastic sheeting is close to concrete surface, covers two layers of geotextiles, one deck oilcloth or colour bar cloth then successively.Top surface is laminating at once material film after concrete final set, and the side is laminating material film after tearing film open, and concrete repair carries out after maintenance is finished.Insulation adopts material to increase and decrease according to temperature information.
The main points of " heat and moisture preserving maintenance " are to guarantee that plastic sheeting and concrete surface are adjacent to, do not leak out, to allow the moistening concrete surface of inside concrete moisture evaporated.Conserving material requires to cover tight, plays insulation effect.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the manual just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1, the pouring technology of dock entrance large concrete in water foundation ditch is characterized in that: divide the section of pluralizing on the base plate plane, the base plate short transverse is divided into plural layer, successively cast.
2, the pouring technology of dock entrance large concrete in water foundation ditch according to claim 1, it is characterized in that: be divided into A, B, C, D section on the base plate plane, wherein A, B section are positioned at the docking block side of dock entrance, and the C section is positioned between A section and the B section, and the D section is positioned between A section and the C section, between B section and the C section; Cast A section, B section are poured into a mould the C section then earlier; Cast D section after A section, B section, C section reach designing requirement intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100357901A CN101289859A (en) | 2008-04-09 | 2008-04-09 | Pouring process for dock entrance large concrete in water foundation ditch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100357901A CN101289859A (en) | 2008-04-09 | 2008-04-09 | Pouring process for dock entrance large concrete in water foundation ditch |
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| CNA2008100357901A Pending CN101289859A (en) | 2008-04-09 | 2008-04-09 | Pouring process for dock entrance large concrete in water foundation ditch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363960A (en) * | 2011-11-23 | 2012-02-29 | 国核工程有限公司 | Large-volume concrete pouring method for nuclear island raft foundation |
| CN111364466A (en) * | 2020-03-20 | 2020-07-03 | 中交第三航务工程局有限公司 | Construction method of dry dock bottom plate |
| CN112550635A (en) * | 2020-12-14 | 2021-03-26 | 江苏巨鑫石油钢管有限公司 | Template control method, device and system for deep sea ocean concrete floating island construction |
-
2008
- 2008-04-09 CN CNA2008100357901A patent/CN101289859A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363960A (en) * | 2011-11-23 | 2012-02-29 | 国核工程有限公司 | Large-volume concrete pouring method for nuclear island raft foundation |
| CN111364466A (en) * | 2020-03-20 | 2020-07-03 | 中交第三航务工程局有限公司 | Construction method of dry dock bottom plate |
| CN111364466B (en) * | 2020-03-20 | 2021-12-14 | 中交第三航务工程局有限公司 | Construction method of dry dock bottom plate |
| CN112550635A (en) * | 2020-12-14 | 2021-03-26 | 江苏巨鑫石油钢管有限公司 | Template control method, device and system for deep sea ocean concrete floating island construction |
| CN112550635B (en) * | 2020-12-14 | 2022-03-22 | 江苏巨鑫石油钢管有限公司 | Template control method, device and system for deep sea ocean concrete floating island construction |
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Effective date of registration: 20090320 Address after: Postcode of No. 132 Pu circuit, Shanghai, Pudong New Area: 200122 Applicant after: China hand in the Third Board Second Engineering Co., Ltd. Co-applicant after: China Construction Third Engineering Division Co., Ltd. Address before: Postcode of No. 132 Pu circuit, Shanghai, Pudong New Area: 200122 Applicant before: China Communications Third Navigational Bureau 2nd Engineering Co., Ltd |
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Open date: 20081022 |