后壓漿施工技術(shù)規(guī)范

1、后壓漿施工技術(shù)規(guī)范Technical Specification of Post Pressure Grouting一、設(shè)計(jì) design1、對(duì)樁徑 800mm樁長(zhǎng)40m采用復(fù)式注漿法即樁端與樁側(cè)注漿法。樁端與樁側(cè) 各對(duì)稱(chēng)安裝二根注漿管。Double pressure grouting to be adopted for 800mm dia./40m long pile, i.e. side and bottom grouting. Two grouting pipes shall be arranged for bottom and side respectively.2、注漿位置 grou

2、ting position ：1）樁端注漿：注漿花管應(yīng)埋入終孔孔底下 100-300mm ，Bottom grouting: grouting pipe should penetrate 100-300mm below the bottom of borehole.2）樁側(cè)注漿：樁長(zhǎng) 30m/40m 的樁注漿花管應(yīng)設(shè)置在地面下 20m/25m 處的砂層 中，或者 15-20m/20-25m 處的砂層與粘性土層界面上 500mm 處，具體位置由各區(qū)段 工勘探孔及樁鉆進(jìn)時(shí)的反渣情況綜合判斷確定，同一建（構(gòu)）筑物注漿位置宜相同 （詳見(jiàn)附圖二）。Side grouting: grouting pipe

3、s for 30m/40m piles should be embedded in sand strata 20m/25m underground, or 500mm above the intersection of 15-20m/20-25m silty sand and clay sand. Exact positions shall be reasonably decided as per out-coming soil condition in test boring and actual piling. Grouting position for the same structur

4、e （building） is preferably identical. （see diagram 2）3、注漿管的長(zhǎng)度：由實(shí)際施工的孔深確定，其長(zhǎng)度為實(shí)際孔深 +0.6m 。Length of grouting pipe: shall be as per actual borehole depth and should be 0.6m longer than borehole depth.4、注漿管采用 DN20 、=2.75的焊管，相鄰注漿管采用絲扣連接，并用 14#鐵絲綁扎固定在鋼筋籠的外側(cè)。 注漿管底端用絲堵封閉， 距底端400mm 長(zhǎng)度范圍內(nèi)對(duì) 稱(chēng)均勻鉆 12個(gè)6的注漿孔，用膠帶及

5、圖釘封孔。注漿管頂部應(yīng)高出砼面 0.5 以上， 且高出地面 0.2-0.3m 。 管頂要用絲堵封閉且用不同顏色的膠帶纏繞， 將樁底注漿管 與樁側(cè)注漿管區(qū)分開(kāi)來(lái)。Grouting pipe type: DN20 、=2.75 welded pipe to be adopted, and adjacent pipes to be connected with threads and tightly fixed to the outer side of rebar cage with 14# galvanized wire. Bottom end of grouting pipe to be sea

6、led with plug and 12 nos of 6 grouting holes to be evenly drilled within the bottom 400mm of grouting pipe, and the same should be sealed with tapes and thumbnails. Top of grouting pipe should be 0.5m above concrete level and 0.2-0.5m above ground level. Pipe tops to be sealed with plugs and wrapped

7、 with tapes of different colors to differentiate bottom and side grouting pipes.5、注漿壓力：樁側(cè)：樁長(zhǎng) 30m為1.5 MPa ，樁長(zhǎng)40m為2.0 MPa ；樁端：樁長(zhǎng) 30m為2.0 MPa ，樁長(zhǎng)40m為2.5MPa 。Grouting pressure ：pile side: 1.5MPa for 30m piles and 2.0Mpa for 40m piles; pile bottom: 2.0MPa for 30m piles and 2.5 for 40m piles.6、注漿材料及注漿量：采用

8、普通 42.5級(jí)水泥，每根樁水泥用量暫定為 3.0t 。初 始?jí)簼{時(shí)水灰比為 1：1，體積為 200L ，余下水灰比為 08:1。Grouting material and quantity: normal OPC 42.5 grade cement to be adopted and 30t of cement for each pile. Initial grouting water-cement ratio should be 1:1, volume should be 200L and trailing water-cement ratio should be 8:1.7、成樁 2天后

9、開(kāi)始注水打開(kāi)通道。 28天內(nèi)進(jìn)行注漿。Water to be injected into grouting pipes after 2 days of pile concreting completion so as to clean grouting pipes and pressure grouting to be carried out within 28 days of pile completion8、注漿順序：先樁側(cè)后樁底，二者時(shí)間間隔不小于 2 小時(shí)。先外圍后中間。注 漿點(diǎn)距未施工或者正在施工的樁的最小距離為 15m 。Grouting sequence: first pile

10、sides and then pile bottom and minimum 2 hours interval to be maintained between the two; first outer and then inner and minimum clearance between pressure grouting pile and installation on-going piles should be at least 15m.9、終止注漿條件：采用注漿壓力與注漿量雙控，以注漿量控制為主，注漿壓 力控制為輔。Condition for pressure grouting su

11、spension: two references to be considered,i. e. grouting pressure and grouting quantity whereas the latter should be taken as primary and the former secondary.二、范圍 scope ：1、煙囪基礎(chǔ)(內(nèi) 4 圈除外)； 446 根Chimney foundation (excluding inner 4 circles) ，total 446nos2、全部三個(gè)水塔的環(huán)基基礎(chǔ)；每個(gè)水塔約 552 根，共 1656 根Ring beam fou

12、ndation of three NDCT.Each CT 552nos ，total 1656nos3、其他需要后壓漿的基礎(chǔ)，現(xiàn)場(chǎng)與業(yè)主協(xié)商確定。Other foundations that requires pressure grouting to be discussed with theOwner at site.三、施工方案 methodology1、工藝流程 technique steps ： 后壓漿工藝流程為：制作壓漿管 安裝壓漿管 檢查壓漿管質(zhì)量 灌注混 凝土打開(kāi)壓漿管，并做注水試驗(yàn)配制水泥漿，樁側(cè)壓漿 配制水泥漿，樁底壓 漿養(yǎng)護(hù)。Steps of post pressure

13、grouting: grouting pile fabrication-grouting pipe installation-grouting pipe quality inspection-concreting-open pressure grouting pipe and water injection test-cement slurry mixing and side grouting-cement slurry mixing and bottom grouting-curing2、注漿管制作 grouting pipe fabrication ：1）注漿管材料 grouting pi

14、pe material ： 采用DN20壁厚2.75mm 的焊管。Welded pipe of DN20 and 2.75mm thick2）注漿管的制作 fabriaction ：采用車(chē)絲機(jī)在焊管的二端車(chē)絲，每個(gè)車(chē)絲段的長(zhǎng)度為 50mm ，車(chē)出來(lái)的絲應(yīng)平 正圓滑，不得出現(xiàn)偏絲滑絲，若出現(xiàn)應(yīng)用切割機(jī)將該段切除后重新車(chē)絲。車(chē)絲后應(yīng) 用生膠帶纏繞 3-5 圈，然后在 下節(jié)管的上端安裝直通并擰緊 。安裝時(shí)應(yīng)用管鉗擰緊， 防止在整個(gè)注漿管管道安裝過(guò)程中出現(xiàn)脫離或者是不封閉，導(dǎo)致漏漿現(xiàn)象的發(fā)生。 同時(shí)根據(jù)實(shí)際孔深制作相應(yīng)的短節(jié)，短節(jié)的二端按上述要求車(chē)絲。Thread to be made at two

15、ends of grouting pipe with threading machines and length of each thread should be 50mm. Threads made should be smooth and even, and distorting or sliding threads are not allowed. In case distorted or slide threads are made, the same should be chopped and remade. Finished threads should be wrapped wi

16、th 3-5 rounds of thread tape, and then straight coupling shall be tightly fixed to one end of the pile with pipe wrench so as to avoid leakage or disconnection during pressure grouting. Grouting pipes shall be prepared in view of pile depth and threads of connections shall be made as required.3）注漿花制

17、作 perforated grouting pipe距底端400mm 內(nèi)對(duì)稱(chēng)均布鉆 12個(gè)6的孔，在每對(duì)孔的斷面用膠帶纏繞 3圈，然 后將圖釘安放在孔的位置，再在圖釘?shù)耐鈧?cè)用高壓絕緣膠帶繚繞 3-5 圈（詳見(jiàn)附圖3）。樁底注漿花管底口采用焊接方式將圓鋼車(chē)成的圓錐狀絲堵焊牢密封（詳見(jiàn)附 圖3）。樁側(cè)注漿花管的底口采用相配套的外絲堵密封。12 nos of holes to be symmetrically and evenly drilled within bottom 400mm of grouting pipe and wrap 3-5 rounds of tapes around each

18、 pair of holes and then pin thumbnails at the holes, then again wrap 3-5 round of high-voltage insulation tape outside the nails （see diagram 3）. The bottom of the grouting pipe shall be sealed with suitable external plug.3、注漿管的安裝 installation of grouting pipe ：1）注漿管位置及長(zhǎng)度的確定 grouting position and pi

19、pe length ：（1）樁底注漿管的底端應(yīng)設(shè)置在實(shí)際孔深以下 100mm 處，注漿花管應(yīng)埋設(shè)在 沉渣及孔底原狀土中。長(zhǎng)度為實(shí)際孔深 +0.1m。煙囪為41m（-5-46 m），水塔為 43.8m （-1-44.8 m ）。Bottom grouting pipe should penetrate 100mm under the bottom of borehole and perforated section should be embedded in bottom sediment. Pipe should be 0.1m longer than actual borehole dept

20、h.（2）樁側(cè)注漿管應(yīng)設(shè)置在距設(shè)計(jì)樁底標(biāo)高約 15m 處的粉砂層中。長(zhǎng)度為 25m+ 樁位處自然地面至設(shè)計(jì)樁頂?shù)木嚯x。 煙囪（ -5-29 m ）與水塔（ -1-25m ）均為 24m。Side grouting pipe should be embedded in silty sand 15m above design pile bottom. The length of grouting pipe should be 25m plus the distance between ground elevation and design pipe top elevation.（3）同一斷面上樁底

21、注漿管與樁側(cè)注漿管應(yīng)對(duì)稱(chēng)均布。Bottom grouting pipe and sides grouting pipe on the same section should be arranged symmetrically.2）注漿管安裝 grouting pipe installation（1）二次清孔期間，應(yīng)將注漿管運(yùn)到樁孔附近，并根據(jù)實(shí)際孔深按上述要求 核算注漿管的長(zhǎng)度，無(wú)誤后方可安裝。During second time flushing, grouting pipes should be gathered around borehole. Grouting pipe length

22、should be calculated exactly according to actual borehole depth and be lowered after sound confirmation.（2）注漿的安裝與鋼筋籠的安放同時(shí)進(jìn)行。樁底注漿管底部 500mm 處應(yīng)內(nèi)折 15防止在注漿管下放過(guò)程中掛碰孔壁。Grouting pipe should be lowered together with rebar cage. Grouting pipe should be bended inward with 15-25 angle at 500mm above pipe end to

23、 avoid clashing with borehole sides while lowering.（3）注漿管與鋼筋籠的主筋采用 14# 鐵絲綁扎固定。注漿管綁扎在鋼筋籠的外 側(cè)。樁底注漿管的底部 15m范圍內(nèi)每 2m設(shè)一綁扎點(diǎn)，其余部位及樁側(cè)注漿管每 4m 設(shè)一綁扎點(diǎn)。Grouting pipe should be fixed with main reinforcement bar using 14# galvanized wire. Grouting pipe should be fixed outside of cage. Bottom grouting pipe should be

24、 fixed every two meters with cage within the bottom 15m, and remaining part and side grouting pipes to be fixed with cage every 4 meters.（4）相鄰上下節(jié)注漿管采用帶絲扣的直通連接，安裝時(shí)應(yīng)用管鉗擰緊，防止 在整個(gè)注漿管管道安裝過(guò)程中出現(xiàn)脫離或者是不密實(shí)導(dǎo)致漏漿現(xiàn)象的發(fā)生。Adjacent two grouting pipes shall be tightly connected with straight coupling using pipe wrench

25、 so as to avoid disconnection or leakage during grouting.（5）在鋼筋籠孔口搭接前，應(yīng)對(duì)壓漿管進(jìn)行注水，檢查其密封性，當(dāng)壓漿導(dǎo) 管內(nèi)注滿(mǎn)清水后，水面能夠保持穩(wěn)定且不升降，證明密封完好。否則，提起鋼筋籠檢查漏水原因，滿(mǎn)足要求后方可下另一節(jié)籠，下籠時(shí)要徐徐放入，嚴(yán)禁用力墩下或 者扭動(dòng)。When lapping rebar cages at borehole, water should be injected to grouting pipe to check its imperviousness. The same can be confir

26、med if level of clean water in grouting pipe remains steady. Otherwise, cage should be lifted to find out leaking points, after which the next section of cage can be lowered. Cage should be lowered with care and jerking or sudden free fall is not allowed.(6) 下籠結(jié)束后，在壓漿管上口擰上堵頭，以免雜物掉入壓漿導(dǎo)管內(nèi)而使管 路不暢。并用不同顏

27、色的油漆將樁底注漿管與樁側(cè)注漿管區(qū)分開(kāi)來(lái)，以免混淆。After full cage is lowered, grouting pipe top opening should be sealed to avoid foreign stuff from falling in and blockage. Exposed grouting pipes should be painted with different colors to differentiate bottom and side grouting pipes.4、注漿 pressure -grouting1) 注漿設(shè)備： Groutin

28、g equipments(1) 采用 SNS-6/10 注漿泵，注漿額定壓力為 10MPa ，額定流量為 100L/min 。(2) 壓漿泵控監(jiān)測(cè)壓力表為 2.5 級(jí) 16MPa 抗震壓力表。(3) 漿液攪拌機(jī)為與注漿泵相匹配的 YJ-340 型液漿攪拌機(jī)，容積為 0.34m3 ， 功率 4kW 。(4) 水泥漿液的輸漿管應(yīng)采用高壓流體泵送軟管，額定壓力不小于 20MPa 。1) Use SNS-6/10 grouting pump, grouting rated pressure 10MPa, rated flow 100L/min.2) Pressure gauge for groutin

29、g pump shall be Grade 2.5 16MPa seismic pressure gauge.3) Grouting batching machine is YJ-340 batching machine which matches with grouting pump, Volume of 0.34m3, power 4kW.4）Grout transmission pipe shall be high pressure flow-pumped soft pipe, rated pressure shall be minimum 20MPa.2）注漿材料及注漿量： grout

30、ing material and volume（1）采用PPC 或 OPC42.5 水泥，每根樁水泥用量暫定為 2-3.0t ，其中樁端水 泥用量約為 2.0t ，樁側(cè)水泥用量約為 1.0t。合理的壓漿量應(yīng)由樁端、端側(cè)土層類(lèi)別、 滲透性能、樁徑、樁長(zhǎng)、承載力增幅要求、沉渣量有泥皮厚度等諸因素確定。在實(shí) 際施工過(guò)程中 ,需要根據(jù)壓水試驗(yàn)情況及壓漿過(guò)程中的反應(yīng)適當(dāng)高速注入量,并通過(guò)對(duì)壓漿壓力、 漿液濃度、壓漿方法諸因素的調(diào)控 ,將所需壓漿量控制在設(shè)計(jì)要求的范 圍內(nèi)。一般漿液濃度和灌漿量大 ,灌漿壓力高 ,加固效果更好。Use PPC or OPC42.5 cement. Volume for ea

31、ch pile temporarily shall be 2-3.0t, among which about 2.0t to be applied at pile bottom and about 1.0t to be applied at pile side. Right grouting volume shall be fixed according to pile bottom& side earth catalogue, permeability, pile dia, pile depth, increasing capacity requirement, sediment thick

32、ness etc other factors. During actual construction, proper amount of grout shall be poured at high speed based on pressure-watering test condition and pressure-grouting process reaction. Also, required grouting volume shall be kept as per design requirement through adjustment of grouting pressure, g

33、rout density and grouting methodology etc. Usually, reinforcing effect will be better under high density, large volume and high grouting pressure.（2）初始?jí)簼{時(shí)水灰比為 1：1，體積為 200L ，余下水灰比為 0.6:1 。泵送流量 控制在 2.0m 3/h 左右。不同濃度的泥漿體其特性有所不同：稀泥漿 （水灰比約為 1-0.8 ：1）便于輸送,滲透能力強(qiáng) ,用于加固預(yù)定范圍的周邊地帶；中等濃度泥漿體 （水 灰比約為 0.6： 1）主要加固預(yù)定范

34、圍內(nèi)的核心部分 ,在這里中等濃度泥漿體起填充、 壓實(shí)、擠密作用；而濃泥漿 （水灰比為 0.4： 1） 的灌注則對(duì)已注入的泥漿體起脫水作 用。 不同階段 ,調(diào)配不同濃度的壓漿漿液 ,并采用相應(yīng)的壓漿壓力 ,漿液濃度控制原則為：依據(jù)壓水試驗(yàn)情況選擇初注濃度 ,通常先用稀泥漿、隨后漸濃 ,最后壓濃漿。在可灌的條件下 ,盡量多用中等濃度以上的漿液 ,以防漿液作無(wú)效擴(kuò)散。At initial stage, water cement ratio shall be 1 ：1, volume 200L; following water3 cement ratio shall be 0.6:1. Pumped

35、flow shall be controlled around 2.0m/h.Characteristics of different density grout differs: thin grout (water cement ratio about 1-0.8:1) is easy for transmission with high permeability and is applied for solidify edge part of intended area; medium density grout (water cement ratio 0.6：1) is mainly a

36、pplied for solidifying core part of intended area, here medium density grout is mainly for fulfilling, compacting and squeezing function. For thick density grout (water cement ratio about 0.4:1), it is mainly for dehydration of poured grout. At each stage different density grout shall be mixed and a

37、pplied with corresponding grouting pressure. Principle for grout density control is: based on pressure-watering condition to fix initial grouting density, usually process is to start from thin grout and gradually increase density until finally apply thick density grout. Under pourable condition, den

38、sity of medium or above shall be applied as much as possible to avoid grout spreading in vain.(3) 注漿應(yīng)對(duì)同一根樁的各注漿管依次實(shí)施等量注漿。Grouting for each grouting pipe of one pile shall be done one by one with equivalent volume.3) 注漿壓力： grouting pressure樁側(cè)：樁長(zhǎng)30m為1.5 MPa ，樁長(zhǎng)40m為2.0 MPa ；樁端：樁長(zhǎng)30m為2.0 MPa， 樁長(zhǎng)40m為2.5MP

39、a 。Pile side: 30m pile: 1.5 MPa, 40m pile: 2.0 MPa;Pile bottom: 30m pile: 2.0 MPa, 40m pile: 2.5MPa.4) 注漿時(shí)間： Grouting time成樁2天后開(kāi)始注水打開(kāi)通道并進(jìn)行壓水試驗(yàn)。壓水試驗(yàn)是壓漿施工前必不可少的重要工序。成樁后至實(shí)施樁側(cè)、 樁底壓漿前 ,通過(guò)壓水試驗(yàn)來(lái)確認(rèn)樁底的可灌性壓水試驗(yàn)是選擇壓漿工藝參數(shù)的依據(jù)之一。 此外 ,壓水試驗(yàn)還能探明并疏通壓漿通道 提高樁底可灌性。Water shall be injected in after 2 days from pile casted

40、for opening pipe for water pressure test. Water pressure test is one integral and important part prior to pressure grouting. After pile casted and till pile side and bottom grouting, it is applied to check whether pile bottom can be poured or not. Water pressure test is one parameter data for select

41、ing grouting workmanship. Besides, it can also check and dredge grouting pipe to enhance pouring smoothness of pile bottom.28天內(nèi)進(jìn)行注漿。 初注時(shí)一般壓力較小 ,漿液亦由稀到稠。 初注時(shí)要密切注意壓 漿壓力、壓漿量和壓漿皮管的變化 ,并注意壓漿節(jié)奏。壓漿過(guò)早 ,將會(huì)因?yàn)闃扼w強(qiáng)度、 樁側(cè)阻力過(guò)低面導(dǎo)致漿液溢出地面造成壓漿失?。?壓漿太晚 ,會(huì)因樁身泥皮硬化而影 響向上泛漿擠入樁周體而導(dǎo)致漿液向遠(yuǎn)處流失達(dá)不到最佳壓漿效果。Grouting shall be conducte

42、d within 28 days. Initial grouting is usually done with low pressure; also grout shall be gradually thickened. Grouting pressure, volume and grouting pipe change shall be paid proper attention to, so is grouting rhyme. If pressure grouting is done earlier, it might fail due to low pile strength and

43、pile frictional resistance leading to grout overflowing above earth. If later, it cantachieve optimal performance due to pile surface slurry solidification which affects grout upward spreading to fulfill surroundings of pile while causing grout to spread towards remote.樁側(cè)注漿完成時(shí)間約 40min ，樁端注漿時(shí)間約 70min

44、 。樁側(cè)注漿完成后 120min 后方可進(jìn)行樁端注漿。Pile side grouting takes about 40min, pile bottom grouting takes 70min. Pile bottom grouting can be started 120min after completion of pile side grouting.5）注漿節(jié)奏 Grouting rhyme10為了使用有限漿液盡可能充填并滯留在樁底有效空間范圍內(nèi),在壓漿過(guò)程中還需掌握壓漿節(jié)奏 ,實(shí)行間歇壓漿。間歇時(shí)間的長(zhǎng)短需依據(jù)壓水試驗(yàn)的結(jié)果而定,并在施注過(guò)程中依據(jù)壓漿壓力變化 ,判斷樁底可灌性現(xiàn)狀

45、加以調(diào)節(jié)。 間歇壓漿的節(jié)奏需掌 握得恰到好處 ,既要使壓漿效果明顯 ,又要防止因間歇停注時(shí)間過(guò)長(zhǎng)堵塞通道而使?jié){ 液沿樁周上冒現(xiàn)象 ,此時(shí)應(yīng)在注入一定漿液后暫停 12 天 ,待樁周漿液凝固后 ,再施 行壓漿 ,可達(dá)到設(shè)計(jì)要求的壓漿量。In order to fully utilize certain grout to fulfill and remain at effective space to the possible efficiency and extent, during pressure-grouting, grouting rhyme shall be maintained and

46、 interval grouting methodology shall be adopted.Interval timeshall be fixed according to pressure-watering test result; at the same time, during grouting, pile bottom pourable shall be concluded and adjusted accordingly in accordance with change of grouting pressure. Rhyme of interval grouting shall

47、 be maintained to the possible extent to ensure obvious grouting effectiveness and at the same time, avoid grout spreading upwards due to block of pipe lead to by over stoppage of interval grouting in which case 1-2 days shall be paused after pouring of certain grout and till pile side grout solidif

48、ied can pressure-grouting be proceeded thus to meet design grouting quantity.6）注漿順序： Grouting sequence（1）同一根樁先樁側(cè)后樁底，二者時(shí)間間隔不小于 2小時(shí)。For one pile, first pile side grouting, then pile bottom. Gap between these two steps shall be minimum 2 hours.（2）群樁先外圍后中間。For group piles, grouting shall be executed fro

49、m outside towards inner center.（3）注漿點(diǎn)距未施工或者正在施工的樁的最小距離為 10m 。Grouting pump location shall be over 10m from nearest non-started pile or ongoing pile.117）壓漿時(shí)應(yīng)注意觀察是否有漿液上溢，一旦發(fā)現(xiàn)上溢反漿，即時(shí)停止。Attention shall be paid to whether there is any overflow of grout while pressure-grouting and on observation of which

50、grouting shall be stopped immediately.8）壓漿過(guò)程中注意安全，要求無(wú)關(guān)人員遠(yuǎn)離壓漿接口處，防止壓漿管爆裂傷 人。拆除壓漿管時(shí)， 要注意高壓管中帶壓力的漿液射出， 壓漿口不要正對(duì)操作人員Safety shall be taken care while grouting. Irrelevant personnel shall be away from interface joints of grouting in case getting hurt from busting of grouting pipe. While dismantling groutin

51、g pipe, attention shall be paid to injection of pressurized-grout from high-pressure pipeline; grouting open shall not be directly facing operators.9）注漿控制標(biāo)準(zhǔn)、終止注漿條件：采用注漿壓力與注漿量雙控，以注漿量控制為主，注漿壓力控制為輔。當(dāng)滿(mǎn)足下列條件之一時(shí)可終止注漿：注漿總量和注漿壓力均達(dá)到設(shè)計(jì)要求；注漿總量已達(dá)到設(shè)計(jì)值的 75% ，且注漿壓力超過(guò)設(shè)計(jì)值。當(dāng)注漿壓力長(zhǎng)時(shí)間低于正常值或地面出現(xiàn)冒漿或周?chē)鷺犊状疂{，應(yīng)改為間歇注 漿，間歇時(shí)間宜為 3060min ，或調(diào)低漿液水灰比。后注漿施工過(guò)程中，應(yīng)經(jīng)常對(duì)后注漿的各項(xiàng)工藝參數(shù)進(jìn)行檢查，發(fā)現(xiàn)異常應(yīng)采 取相應(yīng)處理措施。當(dāng)注漿量等主要參數(shù)達(dá)不到設(shè)計(jì)值時(shí)，應(yīng)根據(jù)工程具體情況采取 相應(yīng)措施。Grouting control standard; grouting stop