CN204435321U - A kind of steam power station water intaking open channel - Google Patents

A kind of steam power station water intaking open channel Download PDF

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Publication number
CN204435321U
CN204435321U CN201420790502.4U CN201420790502U CN204435321U CN 204435321 U CN204435321 U CN 204435321U CN 201420790502 U CN201420790502 U CN 201420790502U CN 204435321 U CN204435321 U CN 204435321U
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China
Prior art keywords
open channel
construction
water intaking
power station
steam power
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Expired - Fee Related
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CN201420790502.4U
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Chinese (zh)
Inventor
任威威
凡威
丁玉玺
李兴
李益
白文龙
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Hennan Electric Power Survey and Design Institute
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Hennan Electric Power Survey and Design Institute
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Priority to CN201420790502.4U priority Critical patent/CN204435321U/en
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Publication of CN204435321U publication Critical patent/CN204435321U/en
Expired - Fee Related legal-status Critical Current
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Abstract

A kind of steam power station water intaking open channel, is deposited reinforced concrete pile below the pool wall phreatic line of open channel both sides, deposited reinforced concrete pile is established open channel sidewall, establishes coupling beam between two side, establish open channel base plate between the Grouting of both sides.The utility model aims to provide and is a kind ofly applied to that groundwater table is higher, soil layer geology is flour sand or sand and the larger open channel of the degree of depth builds measure, possesses the advantage of following several respects: (1) reduces ground works excavated volume greatly, reduction construction costs; (2) can not dewatering construction, be specially adapted to the geological conditions that soil layer is flour sand and sand; (3) easy construction, reduces the construction operation time; (4) can greatly reduce construction land tenure area, reduce the impact on surrounding enviroment.

Description

A kind of steam power station water intaking open channel
Technical field
The utility model relates to a kind of water intaking open channel, is specifically related to a kind of steam power station getting water from water head site open channel.
Background technology
Inland thermal power plant often fetches water from natural river course.When fetching water from natural river course, be everlasting and excavate open channel between river course and water intake pumping station or adopt carry out diversion dark culvert.Particularly the flood season, generally containing a large amount of silt and other foreign material, easily causes open channel and the dark silting contained to natural river course.After secretly containing silting, clear up comparatively inconvenience, and open channel desilting is comparatively easy, and the conveyance capacity of open channel is comparatively large, construct more convenient, cost is relatively low, when orographic condition and layout allow, more often adopts open channel water intaking.
Because the natural river course ordinary circumstance height of water is comparatively large, for ensureing power plant water, the water intaking open channel degree of depth is general all deep.But affect by natural river course, channel place groundwater table is usually higher, and protecting open channel to build block makes troubles.Usually adopt constructure scheme to have two kinds: one to be after carrying out precipitation to underground water at present, then carry out excavation supporting construction; Two is after arranging water-stop curtain, then carries out excavation supporting construction.
The precipitation processing mode of common phreatic high foundation excavation has: (1) when ground soil property be powder sand soil or mud, mucky soil time, the excavation of foundation pit degree of depth is when 2 ~ 3m, and the construction method usually adopting channel diversion to combine with pattern foundation pit supporting structure carries out the excavation of foundation pit work to high water level section.Must soil excavation be closelyed follow with the installation of lower support, with digging with support, shorten without supporting open-assembly time as far as possible, the shrinkage deformation of hole groove being controlled at minimum zone, reduces the settling amount of foundation ditch peripheral ground.When excavation of foundation pit on earth after in time construction cushion coat concrete and underplate concrete, this is the most effective means stoping hole groove excavation shrinkage deformation.(2) when ground soil property is powder sand soil, the excavation of foundation pit degree of depth is when 3 ~ 8m; Usual employing foundation ditch periphery well-point method precipitation program.Foundation ditch adopts 2 excavations, after being excavated to out the water surface the 1st time, draws punching with dredge pump head to floral tube, draws when rushing and guarantees that floral tube is placed vertical as far as possible.The precipitation area that every mouthful of dewatering well is born is not more than 15m 2, to guarantee to seal by mouth place when centrifugal pump is installed.Centrifugal pump is installed must closely follow earthwork secondary excavation, as far as possible shortens foundation ditch open-assembly time, when excavation of foundation pit timely construction cushion coat concrete and underplate concrete on earth.(3) when ground soil property is powder sand soil or gravel, the construction of the excavation of foundation pit degree of depth when below 8m, adopts vacuum well-point dewatering scheme to construct usually.Before excavation of foundation pit, answer manhole point dewatering effect and ground stabilization length of time.When well-points dewatering continues more than 20d, groundwater table has been down to the hole end below 0.5m; Excavation of foundation pit when the bottom stab ilization soil body has reached design age or design strength, must can carry out excavation.But when geology be flour sand or sand time, and time underground water is communicated with river course, because the impact of Dewatering often may form piping, thus cause precipitation failure.
According to groundwater table by influence on groundwater degree and impervious layer distributed depth, when excavation of foundation pit cannot adopt common row's precipitation scheme, need adopt the water-stop curtain adapted with geological conditions, wherein the most frequently used way is cement mixing pile and rotary churning pile water stopping curtain.It act as and stops or reduce underground water inflow foundation ditch at the bottom of foundation pit side-wall and foundation ditch, to cut off underground water hydraulic connection inside and outside foundation ditch.Rotary churning pile water stopping curtain is applicable to, the soil layer of existing crude sedimentation and rock, has again the geological conditions of the region complexity such as the miscellaneous fill that the rubble of backfill, jackstone, water permeability are very strong.Its method is as curing compound by cement, by jet grouting pile driving machine under the Grouting Pipe being equipped with horizontal nozzles at the bottom of hole, utilize high-tension apparatus that nozzle is ejected slurries with the pressure of about 20MPa, impact cutting soil, and mix with soil shear failure, form cylinder along with the rotation of Grouting Pipe and lifting, cement paste and the soil body are through a series of physical-chemical reaction, consolidation pile, thus the effect reaching sealing.In addition conventional water-stop curtain has the curtain erection water-proof method such as diaphragm wall, cement earth pile+shaped steel, cuts off underground water and enters construction area.
With upper type after completing precipitation or sealing, adopt the earthwork of big machinery excavation open channel build area, in digging process, need the supporting carrying out side slope in time.After having excavated, carry out building of open channel pool wall and base plate, after having constructed, carry out backfilling of earthwork.To above traditional approach, soil excavation engineering quantity is large, grouting side's amount is high, construction area scope large, integrated cost is higher.
Summary of the invention
The steam power station water intaking open channel that the purpose of this utility model is to overcome the deficiencies in the prior art and provides a kind of easy construction, excavated volume less.
The purpose of this utility model realizes with following technical proposals:
A kind of steam power station water intaking open channel, is deposited reinforced concrete pile below the pool wall phreatic line of open channel both sides, deposited reinforced concrete pile is established open channel sidewall, establishes coupling beam between two side, establish open channel base plate between the Grouting of both sides.
Outside deposited reinforced concrete pile junction, there is pressure-injected cement to starch.
Described open channel sidewall and coupling beam are that concreting forms.
Described coupling beam spacing is 3-5m.
Described open channel base plate is that concreting forms.
The utility model the utility model aims to provide and is a kind ofly applied to that groundwater table is higher, soil layer geology is flour sand or sand and the larger open channel of the degree of depth builds measure, possess the advantage of following several respects: (1) reduces ground works excavated volume greatly, reduce construction costs; (2) can not dewatering construction, be specially adapted to the geological conditions that soil layer is flour sand and sand; (3) easy construction, reduces the construction operation time; (4) can greatly reduce construction land tenure area, reduce the impact on surrounding enviroment.
Accompanying drawing explanation
Fig. 1 is castinplace pile of the present utility model and high pressure jet grouting area planar arrangement diagram;
Fig. 2 is that D-D of the present utility model is to sectional view;
Fig. 3 is transverse cross-sectional view of the present utility model;
Fig. 4 is excavation area of the present utility model backfill schematic diagram;
Fig. 5 is top view of the present utility model.
Detailed description of the invention
The steam power station water intaking open channel that the utility model provides, as depicted in figs. 1 and 2, is deposited reinforced concrete pile 1 below open channel 6 both sides pool wall phreatic line 10, has pressure-injected cement to starch 2 outside deposited reinforced concrete pile 1 junction; As shown in Figure 3 and Figure 4, deposited reinforced concrete pile 1 is established open channel sidewall 4, establish coupling beam 5 between two side 4 every 3-5m, open channel sidewall and coupling beam are that concreting forms; Between both sides Grouting 1, establish open channel base plate 3, open channel base plate 3 forms for concreting, and open channel base plate 3 concrete can use tackifier or silicon ash, or uses tackifier and silicon ash simultaneously.
The utility model builds the engineering measure of open channel, does not adopt traditional precipitation, excavation, supporting, builds system pattern; But the superperformance making full use of cast-in-place concrete pile realizes the object of building open channel.The steam power station concrete implementation step of water intaking open channel that the utility model provides is as follows:
1, in conjunction with geology survey data, excavate phreatic line more than the 10 region A in open channel 6 respective range, it is long to save construction costs that this measure is intended to reduce certain stake, is convenient to the situation of observing concreting castinplace pile simultaneously, as shown in Figure 2, and note the stable of excavation slope.
2, after having excavated, castinplace pile 1, comprehensively before formal construction, should first try to beat a few pile, the design parameters of checking stake, as stake footpath and stake long etc.; Determine that can supporting capacity and the pile quality of stake meet design requirement.Then adopt placing of concrete stake technique after test pile completes, as shown in Figure 1, carry out deposited reinforced concrete pile 1 successively along open channel sidewall areas and construct.The stake footpath of castinplace pile 1 and length obtain according to test pile test and designing and calculating, and castinplace pile 1 is got to the predetermined degree of depth.Strictly should control construction quality when constructing, guaranteeing that the position, position, hole of castinplace pile 1 is accurate, after pile, to be connected closely between castinplace pile with castinplace pile, must not occur large gap, after whole pile, open channel two is arranged castinplace pile 1 and be collectively form overall board-like water-retaining structure separately.
3, as shown in Figure 1, after castinplace pile 1 is built, after cast-in-place pile concrete reaches some strength, because junction between castinplace pile 1 is structural weak face, there is certain gap, when may cause occurring soil erosion phenomenon, when forming water-permeable passage, timely shutoff, passage is formed when being strictly on guard against that the height of water is larger, so that develop into and sharply gush sand, this may cause land subsidence, so that cause the event of major disaster sexual behavior.Therefore after castinplace pile is built, outside castinplace pile handing-over position, use high pressure jet grouting technique to carry out injection cement injection 2, shutoff is carried out to the gap between castinplace pile and the water-permeable passage that may occur, reach the effect of antiseepage, ensure the sealing between stake.
4, as shown in Figure 2, after all being constructed by two row's castinplace piles, the region B between castinplace pile 1 is carried out excavation to desired depth, after excavating design elevation, namely form water intaking open channel 6; Now in water intaking open channel 6, water level flushes with river course 8; After completing after excavation, two row's pile qualities of castinplace pile 1 and the sealing between stake and stake are checked, if there are the problems such as seepage, adopting remedial measures in time with blind, preventing from causing surface collapse outside open channel because there is soil erosion phenomenon.
5, as shown in Figure 3, after the sealing guaranteeing two campsheds and stability, on the impact bottom open channel during for reducing desilting, arrange structure base plate 3 bottom water intaking open channel, namely base plate does not bear larger load substantially, only for convenience of desilting.The base plate 3 of water intaking open channel can adopt concrete placed under water construction method, and lower concreting needs to possess reasonable anti-impact and to fall apart performance, and the amount that namely cement paste is lost in water and water logging enters in concrete is very low.To fall apart performance for reaching good anti-impact, concrete can use tackifier or silicon ash, or uses tackifier and silicon ash simultaneously, ensures that concrete has sufficiently high cohesiveness.
6, as shown in Figure 3, after two row's castinplace piles 1 meet the requirement of stablizing with seal, carry out excavating the concreting that above open channel sidewall 4 is pushed up in region stake, every 3-5 rice concreting coupling beam 5 between both sides open channel sidewall 4, between coupling beam 5, spacing is preferably 4m, note castinplace pile 1 and the Anti-seeping technology newly watering sidewall 4 concrete junction, to ensure force-transfer characteristic and the anti-permeability performance of contact surface simultaneously.
7, as shown in Figure 4, after open channel 6 main structure construction, water level region earth excavation part and region C on original place are backfilled, be backfilled to original ground 9 height, as shown in Figure 5, be overall top view of the present utility model, open channel 6 drainage between thermal power plant's water plant 7 and river course 8 is fetched water.
Because deposited reinforced concrete pile is a kind of directly pore-forming on the spot on stake position at the scene, in hole, then lay the stake of reinforcing cage concreting again.Its advantage has: 1, construction noise and vibrations less, if riverbank place soil layer is silt or flour sand, excessive vibration is comparatively large to soil layer disturbance, is unfavorable for construction; 2, the stake footpath of deposited reinforced concrete pile can be enough large because to different geological condition time, stake footpath can adjust to adapt to requirement; 3, deposited reinforced concrete pile almost can where base in office use, and range of application is wider.But obtain good bearing capacity to deposited reinforced concrete pile, then higher to the requirement of construction quality, require that unit in charge of construction possesses higher level, can control preferably concrete quality.The utility model does water-retaining structure, supporting and protection structure and open channel body construction so that cast-in-place concrete pile is double, the new paragon of one-object-many-purposes builds open channel, simultaneously for increasing the bending rigidity of castinplace pile, adopt coupling beam to connect to open channel sidewall, this measure effectively can resist horizontal force action.

Claims (5)

1. a steam power station water intaking open channel, is characterized in that: be deposited reinforced concrete pile below the pool wall phreatic line of open channel both sides, deposited reinforced concrete pile established open channel sidewall, establishes coupling beam between two side, establish open channel base plate between the Grouting of both sides.
2. water intaking open channel in steam power station as claimed in claim 1, is characterized in that: outside deposited reinforced concrete pile junction, have pressure-injected cement to starch.
3. water intaking open channel in steam power station as claimed in claim 1, is characterized in that: described open channel sidewall and coupling beam are that concreting forms.
4. the steam power station water intaking open channel as described in claim 1 or 3, is characterized in that: described coupling beam spacing is 3-5m.
5. water intaking open channel in steam power station as claimed in claim 1, is characterized in that: described open channel base plate is that concreting forms.
CN201420790502.4U 2014-12-15 2014-12-15 A kind of steam power station water intaking open channel Expired - Fee Related CN204435321U (en)

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111827211A (en) * 2020-07-27 2020-10-27 中国电建集团成都勘测设计研究院有限公司 Water gaging weir trough and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111827211A (en) * 2020-07-27 2020-10-27 中国电建集团成都勘测设计研究院有限公司 Water gaging weir trough and construction method thereof

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150701

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