CN101476308B - Construction method for large cast-in-situ steel reinforced concrete inlet channel and turbine housing - Google Patents

Construction method for large cast-in-situ steel reinforced concrete inlet channel and turbine housing Download PDF

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Publication number
CN101476308B
CN101476308B CN2009103003373A CN200910300337A CN101476308B CN 101476308 B CN101476308 B CN 101476308B CN 2009103003373 A CN2009103003373 A CN 2009103003373A CN 200910300337 A CN200910300337 A CN 200910300337A CN 101476308 B CN101476308 B CN 101476308B
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inlet channel
volute
concrete
outside
template
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CN101476308A (en
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李景芳
吴�荣
程惠敏
吴树勤
夏芬
刘垚坦
倪金华
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China Construction Second Engineering Bureau Co Ltd
Third Construction Engineering Co Ltd of China Construction Second Engineering Bureau Co Ltd
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China Construction Second Engineering Bureau Co Ltd
Third Construction Engineering Co Ltd of China Construction Second Engineering Bureau Co Ltd
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

The invention relates to a large-scale cast-in-situ reinforced concrete water inlet duct and scroll case construction method, the construction sequence is: bottom board of the water inlet duct, far end lower part outside the turning of the water inlet duct, far end upper part outside the turning of the water inlet duct, outer circumference of the turning of the water inlet duct, far end outside the scroll case, near end outside the scroll case, top outside the scroll case and the second pouring construction. The construction method has clear levels, reduces the concrete pouring amount at the key parts of the water inlet duct: the outer circumference of the turning of the water inlet duct and the near end outside the scroll case, by partitioning construction; ensures the concrete forming quality of the water inlet duct and the scroll case; and avoids large volume concrete cracks.

Description

The job practices of large cast-in-situ steel reinforced concrete inlet channel and volute
(1) technical field
The present invention relates to a kind of job practices of large cast-in-situ steel reinforced concrete intake strucure,
(2) background technology
Conventional small-sized cast-in-situ steel reinforced concrete intake strucure job practices is the monobloc cast method, because conventional small-sized intake strucure shape is comparatively simple, concrete primary concreting amount is little, so ensure the quality of products easily.But, for the large cast-in-situ steel reinforced concrete intake strucure, carrying out concrete formation with the monobloc cast method, hole usually takes place, reveals quality problems such as muscle, distress in concrete in difficult quality guarantee then, influences intake strucure application life.Simultaneously, owing to be disposable cast-in-place, the inner built-in fitting of intake strucure position, levelness, verticality are difficult to guarantee, influence post facility and install.
(3) summary of the invention
The job practices that the purpose of this invention is to provide a kind of large cast-in-situ steel reinforced concrete inlet channel and volute, solve the problem that the Forming Quality of large cast-in-situ steel reinforced concrete intake strucure is difficult to guarantee, thereby guarantee the application life and the precision of equipment installation of reinforced concrete structure.
Technical scheme of the present invention:
The job practices of this large cast-in-situ steel reinforced concrete inlet channel and volute is characterized in that step is as follows:
Step 1: inlet channel and the raft foundation construction of bottom, volute zone;
Step 2: formulate steel concrete inlet channel and volute block placement scheme, inlet channel is divided into far-end bottom, inlet channel turning outside A piece, inlet channel base plate B piece, inlet channel turning periphery C piece, four constructions of inlet channel turning outside far-end top D piece, volute is divided into volute outside near-end E piece, volute outside far-end F piece, three constructions of volute outside top G piece, reaches top steel loop, bottom steel loop, final grouting construction; The sequencing of its construction is: far-end top D piece, inlet channel turning periphery C piece, volute outside far-end F piece, volute outside near-end E piece, volute outside top G piece and final grouting were constructed outside far-end bottom A piece, inlet channel were turned outside inlet channel base plate B piece, inlet channel were turned;
Step 3: measurement and positioning on raft foundation;
Step 4: far-end top D piece outside far-end bottom A piece, inlet channel were turned outside construction inlet channel base plate B piece, inlet channel were turned;
Step 5: be transported to the scene after inlet channel template examination assembly unit is qualified, the assembling of inlet channel turning periphery C construction part;
Step 6: inlet channel turning periphery C piece reinforcing bar, concrete construction, inlet channel turning periphery 1m reserves the final grouting district in the zone:
Step 7: inlet channel concrete curing expiration and reach design strength after remove the inlet channel template;
Step 8: measure unwrapping wire at the inlet channel top platform, check inlet channel eck center, to the volute centralized positioning;
Step 9: construction volute outside far-end F piece steel concrete;
Step 10: be transported to on-the-spot volute area E piece construction part assembling after volute template examination assembly unit is qualified;
Step 11: volute outside near-end E piece reinforcing bar, concrete construction, volute outside top steel loop and steel loop position, bottom give over to final grouting;
Step 12: the near-end E block concrete maintenance expiration of the volute outside, remove the volute template behind the construction volute outside top G piece;
Step 13: volute outside near-end E piece is back, steel loop location final grouting up and down, and whole inlet channel and volute reinforced concrete construction are finished.
In the above-mentioned steps 1, at inlet channel and the pre-buried anchor reinforcing bar that draws of volute zone bottom raft foundation, the raft foundation top of concrete adopts high pressure water washing, forms even, rough working face.
In the above-mentioned steps 5, before the assembling of inlet channel template, lay the bottom falsework earlier, after assembled on site is in place, adopt wire rope and earth anchor drawknot and by cable regulator adjusting degree of tightness with fixing inlet channel template, between wire rope and the template concrete pad is set, the inner internal stent that adopts of inlet channel template supports.
In the above-mentioned steps 5, bottom bracket is made up of steel pipe, diagonal brace, adjusting screw thread and supporting plate, between stent bearing plank and the inlet channel template concrete pad is set.
In the above-mentioned steps 6, three-dimensional reinforcing bar, all the other position reinforcing bars of colligation again around the first colligation inlet channel template.
In the above-mentioned steps 11, three-dimensional reinforcing bar, all the other position reinforcing bars of colligation again around the first colligation volute template.
Inlet channel turning periphery C piece adopts high slump concrete to build in the above-mentioned steps 6, mixes polyacrylic fibre in the concrete.
In above-mentioned steps 7, the step 12, carry out temperature detection monitoring in the concrete curing process.
In the above-mentioned steps 10, before the volute template assembling, lay the bottom falsework earlier, after assembled on site is in place, adopt wire rope and earth anchor drawknot and by cable regulator adjusting degree of tightness with fixing volute template, between wire rope and the volute template concrete pad is set; Between stent bearing plank and the volute template concrete pad is set.
In the above-mentioned steps 11, during the near-end E piece construction of the volute outside, adopt high slump concrete to build, in step 12, volute outside top G piece adopts common slump concrete to build, and mixes polyacrylic fibre in the concrete.
The present invention compares the beneficial effect that has with existing conventional art:
(4) description of drawings
The present invention takes block construction and special position to take the method for final grouting to large cast-in-situ steel reinforced concrete inlet channel and volute, by armored concrete regular around construct earlier inlet channel and the volute, progressively dwindle inlet channel and scope is built in the volute zone, concentrate strength on again finishing the special-shaped zone construction of inlet channel and volute, the construction clear layer is conducive to guarantee inlet channel and volute concrete formation quality; Block placement has reduced mass concrete one-time-concreting amount, is conducive to the construction tissue, can effectively reduce main equipment and drop into, and has reduced the Volume Concrete Cracks possibility, and concrete construction quality guarantees easily, guarantees the service life of reinforced concrete constructional work; The significant points final grouting is conducive to guarantee that inner built-in fitting position, levelness, perpendicularity are accurate, thereby guarantees precision of equipment installation.
Fig. 1 is inlet channel and volute floor map;
Fig. 2 is the A-A sectional drawing of Fig. 1.
Fig. 3 is an inlet channel measurement and positioning schematic diagram.
Fig. 4 is a D piece construction schematic diagram in far-end top outside far-end bottom A piece, inlet channel base plate B piece, inlet channel were turned outside inlet channel was turned.
Fig. 5 is an inlet channel template assembly schematic diagram;
Fig. 6 is an inlet channel modular unit assembling schematic diagram.
Fig. 7 is inlet channel template tension and compression schematic diagrames;
Fig. 8 is that the inlet channel Form hanger draws schematic diagram.
Fig. 9 is the support schematic diagram;
Figure 10 is an inlet channel turning periphery C block concrete construction in layer schematic diagram.
Figure 11 is a volute measurement and positioning floor map.
Figure 12 is a volute outside far-end F piece construction schematic diagram;
Figure 13 is a volute template assembly schematic diagram.
Figure 14 is a fixedly schematic diagram of volute template.
Figure 15 is a volute outside near-end E piece construction schematic diagram;
Figure 16 is a volute outside top G piece construction schematic diagram.
(5) specific embodiment
Figure 17 is volute final grouting schematic diagram.
The step of the job practices of large cast-in-situ steel reinforced concrete inlet channel of the present invention and volute is as follows:
Step 1 is referring to Fig. 1,2,7,8, inlet channel and volute are positioned on the intake strucure raft foundation, and its bottom raft foundation 3 of construction earlier is at inlet channel and bottom, volute zone raft foundation 3 pre-buried earth anchors 10, the raft foundation top of concrete adopts high pressure water washing, forms even, rough working face.
Step 2 is referring to Fig. 1,2, construction features according to inlet channel and volute, inlet channel zone 1 is divided into inlet channel turn four of the outside far-end top D and reserve final grouting district 4 block constructions of outside far-end bottom A, inlet channel base plate B, inlet channel turning periphery C, inlet channel that turn, volute zone 2 is divided into volute outside near-end E, volute outside far-end F, three of volute outside top G and reserves top steel loop 5 and bottom steel loop 6, final grouting construction; The sequencing of its construction is: far-end top D piece, inlet channel turning periphery C piece, volute outside far-end F piece, volute outside near-end E piece, volute outside top G piece and top steel loop 5, bottom steel loop 6, final grouting were constructed outside far-end bottom A piece, inlet channel were turned outside inlet channel base plate B piece, inlet channel were turned.
Step 3 is located on raft foundation 3 according to inlet channel eck coordinate referring to Fig. 3, determines the inlet channel boundary line according to the inlet channel upright projection on raft foundation;
Step 4 is referring to Fig. 4, construction inlet channel base plate B piece and inlet channel far-end bottom, the outside A piece of turning earlier, the inlet channel of constructing again far-end top, the outside D piece of turning; Wherein inlet channel base plate B piece surface requirements press polish, D piece constuction joint position, far-end top formed even, rough working face outside far-end bottom A piece, inlet channel were turned outside inlet channel was turned;
Step 5 is referring to Figure 59, and inlet channel template 11 is designed to inlet channel modular unit 7 sectional makings, and each unit combination 8 is divided into three or four making, tries the definite assembled on site sequencing of assembly unit and numbering before formal the installation; Before 11 assemblings of inlet channel template, lay bottom falsework 13 earlier, after assembled on site is in place, adopts wire rope 9 and earth anchor 10 drawknots and regulate degrees of tightness with fixing inlet channel template 11 by cable regulator 12, promptly adopt support, way that drawknot closes reinforces inlet channel template 11; Between wire rope 9 and the template 11 concrete pad 14 is set; The inlet channel template 11 inner internal stent 15 that adopt support; Bottom bracket 13 is made up of steel pipe 17, diagonal brace 18, adjusting screw thread 19 and supporting plate 16; Between stent bearing plank 16 and the inlet channel template 11 concrete pad 14 is set;
Step 6 is referring to Figure 10, and during the construction of inlet channel turning periphery C piece, first colligation inlet channel template 11 is three-dimensional reinforcing bar on every side, the casting and compacting of concrete of all the other position reinforcing bars of colligation, and reservation again manhole; Inlet channel turning outer regions adopts high slump concrete 20 to build, and upper area adopts common slump concrete 21 to build; Wherein mix polyacrylic fibre in the concrete, the setting-out in 1: 1 on the inlet channel steelframe model that builds of the three-dimensional reinforcing bar of inlet channel is made; Inlet channel turning periphery 1m zone gives over to final grouting;
Step 7 is carried out temperature detection monitoring referring to Figure 10 in the inlet channel concrete curing process, maintenance expiration and reach design strength after opposite orderly release inlet channel template during by assembling.
Step 8 is measured unwrapping wire referring to Figure 11 at the inlet channel top platform, checks inlet channel eck center, to the volute centralized positioning;
Step 9 is referring to Figure 12: construction volute outside far-end F piece steel concrete, and the constuction joint position forms even, rough working face;
Step 10 is referring to Figure 13,14: volute template 25 is designed to cutwater 24 and volute modular unit 23 sectional makings, tries assembly unit before formal the installation and numbering is determined the assembled on site sequencing; Before 25 assemblings of volute template, lay bottom falsework 13 earlier, after assembled on site is in place, adopts wire rope 9 and earth anchor 10 drawknots and regulate degrees of tightness with fixing volute template 25 by cable regulator 12, promptly adopt support, way that drawknot closes reinforces volute template 25; Between wire rope 9 and the volute template 25 concrete pad 14 is set; Between stent bearing plank 16 and the volute template 25 concrete pad 14 is set;
Step 11 is referring to Figure 15: during the near-end E piece construction of the volute outside, and three-dimensional reinforcing bar around the first colligation volute template 25, all the other position reinforcing bars of colligation again, and reserve the casting and compacting of concrete manhole; When volute outside near-end is constructed, adopt high slump concrete to build, the setting-out in 1: 1 on the volute steelframe model that builds of the three-dimensional reinforcing bar of volute is made; Volute gives over to final grouting in the steel loop position up and down;
Step 12 is referring to Figure 16: carry out temperature detection monitoring in the volute concrete curing process, treat that volute outside top G piece construction finishes, maintenance expiration and reach design strength after opposite orderly release volute template during by assembling, the volute outside top adopts common slump concrete to build, and wherein mixes polyacrylic fibre in the concrete.
Step 13 is referring to Figure 17: the volute district is back, steel loop location final grouting up and down, bottom steel loop 6 adopts epoxy concrete 26 final groutings, top steel loop 5 adopts 27 grouting of cementation material, and its upper area adopts 28 pourings of stone grouting material, and whole inlet channel and volute reinforced concrete construction are finished.

Claims (10)

1. the job practices of large cast-in-situ steel reinforced concrete inlet channel and volute is characterized in that step is as follows:
Step 1: inlet channel (1) and volute (2) zone bottom raft foundation (3) construction;
Step 2: formulate steel concrete inlet channel (1) and volute (2) block placement scheme, inlet channel is divided into far-end bottom, the inlet channel turning outside, inlet channel base plate, inlet channel turning periphery, the inlet channel turning outside four constructions in far-end top, volute is divided into volute outside near-end, volute outside far-end, three constructions of volute outside top, reaches top steel loop (5), bottom steel loop (6), final grouting construction; The sequencing of its construction is: far-end top, inlet channel turning periphery, volute outside far-end, volute outside near-end, volute outside top and final grouting were constructed outside far-end bottom, inlet channel were turned outside inlet channel base plate, inlet channel were turned;
Step 3: measurement and positioning on raft foundation;
Step 4: far-end top outside far-end bottom, inlet channel were turned outside construction inlet channel base plate, inlet channel were turned;
Step 5: be transported to the scene after inlet channel template (11) examination assembly unit is qualified, the assembling of inlet channel turning periphery construction part;
Step 6: inlet channel turning periphery reinforcing bar, concrete construction, inlet channel turning periphery 1m reserves final grouting district (4) in the zone;
Step 7: inlet channel concrete curing expiration and reach design strength after remove the inlet channel template;
Step 8: measure unwrapping wire at the inlet channel top platform, check inlet channel eck center, to the volute centralized positioning;
Step 9: construction volute outside far-end steel concrete;
Step 10: be transported to the construction part assembling of on-the-spot volute zone after volute template examination assembly unit is qualified;
Step 11: volute outside near-end reinforcing bar, concrete construction, volute outside top steel loop and steel loop position, bottom give over to final grouting;
Step 12: the near-end concrete curing expiration of the volute outside, remove the volute template after the construction volute outside top;
Step 13: volute outside near-end is back, steel loop location final grouting up and down, and whole inlet channel and volute reinforced concrete construction are finished.
2. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute is characterized in that: in the above-mentioned steps 1, at inlet channel and the pre-buried anchor reinforcing bar that draws of volute zone bottom raft foundation, raft foundation concrete
End face adopts high pressure water washing, forms even, rough working face.
3. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute, it is characterized in that: in the above-mentioned steps 5, before inlet channel template (11) assembling, lay bottom falsework (13) earlier, after assembled on site is in place, adopt wire rope (9) and earth anchor (10) drawknot and regulate degree of tightness with fixing inlet channel template (11) by cable regulator (12), between wire rope (9) and the template (11) concrete pad (14) is set, the inner internal stent (15) that adopts of inlet channel template (11) supports.
4. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 3 and volute, it is characterized in that: in the above-mentioned steps 5, bottom bracket (13) is made up of steel pipe (17), diagonal brace (18), adjusting screw thread (19) and supporting plate (16), between stent bearing plank (16) and the inlet channel template (11) concrete pad (14) is set.
5. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute is characterized in that: in the above-mentioned steps 6, and three-dimensional reinforcing bar, all the other position reinforcing bars of colligation again around the first colligation inlet channel template.
6. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute is characterized in that: in the above-mentioned steps 11, and three-dimensional reinforcing bar, all the other position reinforcing bars of colligation again around the first colligation volute template.
7. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute is characterized in that: inlet channel turning periphery adopts high slump concrete (20) to build in the above-mentioned steps 6, mixes polyacrylic fibre in the concrete.
8. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute is characterized in that: in above-mentioned steps 7, the step 12, carry out temperature detection monitoring in the concrete curing process.
9. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute, it is characterized in that: in the above-mentioned steps 10, before volute template (25) assembling, lay bottom falsework (13) earlier, after assembled on site is in place, adopt wire rope (9) and earth anchor (10) drawknot and regulate degree of tightness with fixing volute template (25), between wire rope (9) and the volute template (25) concrete pad (14) is set by cable regulator (12); Between stent bearing plank (16) and the volute template (25) concrete pad (14) is set.
10. the job practices of large cast-in-situ steel reinforced concrete inlet channel according to claim 1 and volute, it is characterized in that: in the above-mentioned steps 11, when volute outside near-end is constructed, the employing high slump concrete is built, in step 12, the volute outside top adopts common slump concrete to build, and mixes polyacrylic fibre in the concrete.
CN2009103003373A 2009-01-24 2009-01-24 Construction method for large cast-in-situ steel reinforced concrete inlet channel and turbine housing Expired - Fee Related CN101476308B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102296570B (en) * 2011-06-27 2013-04-17 中国建筑第二工程局有限公司 Construction method for large cast-in-situ reinforced concrete water inlet channel
CN103821350A (en) * 2014-02-25 2014-05-28 中天建设集团有限公司 Pipeline reserved hole mold type construction method
CN105863676B (en) * 2016-04-07 2018-04-20 山东天齐置业集团股份有限公司 A kind of underground loop cast-in-place concrete air passage construction method

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