CN111236244A - Method for treating water leakage of free section of anchor cable on sand layer of foundation pit - Google Patents
Method for treating water leakage of free section of anchor cable on sand layer of foundation pit Download PDFInfo
- Publication number
- CN111236244A CN111236244A CN202010019651.0A CN202010019651A CN111236244A CN 111236244 A CN111236244 A CN 111236244A CN 202010019651 A CN202010019651 A CN 202010019651A CN 111236244 A CN111236244 A CN 111236244A
- Authority
- CN
- China
- Prior art keywords
- anchor cable
- grouting
- foundation pit
- free section
- anchor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000004576 sand Substances 0.000 title claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 44
- 239000000945 filler Substances 0.000 claims abstract description 25
- 238000004873 anchoring Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 49
- 239000010959 steel Substances 0.000 claims description 49
- 238000010276 construction Methods 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000011440 grout Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 239000011148 porous material Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 9
- 239000002699 waste material Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
本发明涉及基坑支护的技术领域,公开了基坑砂层锚索自由段渗漏水的治理方法,包括:在基坑的侧壁上钻挖锚索孔;在锚索上布置有一次注浆管和二次注浆管,并将锚索下放至锚索孔内;锚索包括自由段和锚固段,在自由段的外周上缠绕有防渗填充物,当锚索被下放在锚索孔内时,锚固段全部置于锚索孔内,自由段的下部置于锚索孔内,自由段的上部置于锚索孔的外部;进行第一次注浆、二次注浆;待浆液凝固后,锚索通过固定结构与支护桩进行张拉固定;通过在锚索的自由段缠绕防渗填充物,防渗填充物贴合在锚索孔的侧壁上,与锚索孔的结合更加紧密,浆液附着在防渗填充物的外周,浆液与防渗填充物之间形成一体布置的防渗层,从而能起到更佳的防水防渗效果。
The invention relates to the technical field of foundation pit support, and discloses a treatment method for water leakage in the free section of anchor cables in the sand layer of the foundation pit. The grouting pipe and the secondary grouting pipe, and the anchor cable is lowered into the anchor cable hole; the anchor cable includes a free section and an anchor section, and an anti-seepage filler is wrapped around the outer circumference of the free section. When inside the cable hole, all the anchoring sections are placed in the anchor cable hole, the lower part of the free section is placed in the anchor cable hole, and the upper part of the free section is placed outside the anchor cable hole; the first grouting and the second grouting are carried out; After the slurry is solidified, the anchor cable is tensioned and fixed with the supporting pile through the fixed structure; the anti-seepage filler is wrapped around the free section of the anchor cable, and the anti-seepage filler is attached to the side wall of the anchor cable hole and is connected with the anchor cable. The pores are combined more closely, the slurry is attached to the outer periphery of the anti-seepage filler, and an integrated anti-seepage layer is formed between the slurry and the anti-seepage filler, so that a better waterproof and anti-seepage effect can be achieved.
Description
技术领域technical field
本发明专利涉及基坑支护的技术领域,具体而言,涉及基坑砂层锚索自由段渗漏水的治理方法。The patent of the present invention relates to the technical field of foundation pit support, in particular, to a method for treating water leakage in the free section of the anchor cable in the sand layer of the foundation pit.
背景技术Background technique
目前,随着城市建设的快速发展,深基坑支护工程越来越多,桩锚支护结构形式由于其经济优越性以及施工效率高等优点,使得其在基坑支护工程中使用的越来越多。At present, with the rapid development of urban construction, there are more and more deep foundation pit support projects. Due to its economic superiority and high construction efficiency, the pile-anchor support structure is more and more used in foundation pit support projects. more and more.
但深基坑砂层中锚索张拉锁定后沿自由段波纹管处漏水的通病问题一直都未得到很好地解决,持续漏水势必会造成基坑周边地下水位下降,进而导致基坑影响范围内的道路、管线以及建(构)筑物沉降加大,甚至超标,给基坑安全带来隐患。However, the common problem of water leakage along the bellows in the free section after the anchor cable is tensioned and locked in the sand layer of the deep foundation pit has not been well solved. Continuous water leakage will inevitably cause the groundwater level around the foundation pit to drop, which will lead to the influence of the foundation pit. The settlement of roads, pipelines and buildings (structures) in the area increases, or even exceeds the standard, which brings hidden dangers to the safety of foundation pits.
现有技术中,一般采用浆液封堵等方法,但是这些方法在防渗透效果有限,存在对于漏水严重的锚索孔的封堵不能起到很好防渗漏效果的问题。In the prior art, methods such as slurry plugging are generally used, but these methods have limited anti-seepage effect, and have the problem that the plugging of the anchor cable holes with serious water leakage cannot achieve a good anti-leakage effect.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供基坑砂层锚索自由段渗漏水的治理方法,旨在解决现有技术中,对漏水严重的锚索孔的封堵不能起到很好防渗漏效果的问题。The purpose of the present invention is to provide a treatment method for water leakage in the free section of the anchor cable in the sand layer of the foundation pit, and to solve the problem that in the prior art, the plugging of the anchor cable hole with serious water leakage cannot play a good anti-leakage effect. .
本发明是这样实现的,基坑砂层锚索自由段渗漏水的治理方法,包括以下施工步骤:The present invention is realized in this way, and the treatment method for the water leakage in the free section of the anchor cable in the sand layer of the foundation pit comprises the following construction steps:
1)、在基坑的侧壁上钻挖锚索孔;1), drill the anchor cable hole on the side wall of the foundation pit;
2)、在锚索上布置有一次注浆管和二次注浆管,并将所述锚索下放至所述锚索孔内;2) Arrange a primary grouting pipe and a secondary grouting pipe on the anchor cable, and lower the anchor cable into the anchor cable hole;
3)、所述锚索包括自由段和锚固段,在所述自由段的外周上缠绕有防渗填充物,当所述锚索被下放在所述锚索孔内时,所述锚固段全部置于所述锚索孔内,所述自由段的下部置于所述锚索孔内,所述自由段的上部置于所述锚索孔的外部;3) The anchor cable includes a free section and an anchor section, and an anti-seepage filler is wound around the outer circumference of the free section. When the anchor cable is placed in the anchor cable hole, all the anchor sections are is placed in the anchor cable hole, the lower part of the free segment is placed in the anchor cable hole, and the upper part of the free segment is placed outside the anchor cable hole;
4)、利用所述一次注浆管进行第一次注浆;4), using the primary grouting pipe for the first grouting;
5)、一次注浆完成后,利用所述二次注浆管进行二次注浆,直至浆液从所述锚索孔的孔口处溢出时,停止注浆;5) After the primary grouting is completed, use the secondary grouting pipe to carry out secondary grouting, and stop grouting until the slurry overflows from the orifice of the anchor cable hole;
6)、在所述自由段的上部设置有固定结构,待浆液凝固后,所述锚索通过所述固定结构与所述支护桩进行张拉固定;6) A fixed structure is arranged on the upper part of the free section, and after the slurry is solidified, the anchor cable is tensioned and fixed with the support pile through the fixed structure;
7)、施工完成。7), the construction is completed.
进一步地,在步骤2)中,在下放所述锚索时,将二次注浆管的端头固定在所述锚固段的底端上,随着所述锚索的下放,所述二次注浆管下放至锚索孔的底部。Further, in step 2), when the anchor cable is lowered, the end of the secondary grouting pipe is fixed on the bottom end of the anchoring section. Lower the grouting pipe to the bottom of the anchor cable hole.
进一步地,在步骤3)中,当所述锚固段的底端下放到所述锚索孔的孔底时,通过所述一次注浆管向所述锚索孔内注浆,当浆液从所述锚索孔的孔口处溢出时,停止注浆,并且沿背离所述孔底方向,将所述锚索向外拉出0.25m,继续注浆。Further, in step 3), when the bottom end of the anchoring section is lowered to the bottom of the anchor cable hole, grouting is carried out into the anchor cable hole through the primary grouting pipe. When the orifice of the anchor cable hole overflows, stop grouting, and in the direction away from the bottom of the hole, pull the anchor cable outward by 0.25m, and continue grouting.
进一步地,在步骤4)中,沿朝向基坑侧壁方向,向固定结构上钻多个钻孔,所述钻孔环绕布置在所述锚索的自由端的端头周围,并向所述钻孔内打入多根朝向不同方向并且嵌入在基坑侧壁的土体中的注浆钢管,所述注浆钢管的管身具有多个钻孔。Further, in step 4), along the direction toward the side wall of the foundation pit, drill a plurality of drill holes on the fixed structure, the drill holes are arranged around the end of the free end of the anchor cable, and the drill holes are drilled toward the hole. A plurality of grouting steel pipes oriented in different directions and embedded in the soil of the side wall of the foundation pit are driven into the holes, and the pipe body of the grouting steel pipes has a plurality of drilling holes.
进一步地,在步骤4)中,当一次注浆完成后,向所述注浆钢管内进行注浆,直至浆液从所述注浆钢管的孔口漏出,注浆完成,再用使用了固化剂配置而成的浆液对所述注浆钢管的钢管口进行封堵。Further, in step 4), after the first grouting is completed, grouting is carried out into the grouting steel pipe until the slurry leaks from the orifice of the grouting steel pipe, the grouting is completed, and then the curing agent is used. The prepared slurry seals the steel pipe opening of the grouting steel pipe.
进一步地,在步骤5)中,固定结构为腰梁,所述腰梁固定在支护桩上,所述锚索的锚固段穿设在所述腰梁上,并通过锚具进行锚固、张拉,若出现从所述腰梁渗漏水,则在所述腰梁漏水点周围钻孔用注浆速凝灌浆料填塞。Further, in step 5), the fixed structure is a waist beam, the waist beam is fixed on the support pile, the anchoring section of the anchor cable is worn on the waist beam, and anchoring, tensioning and tensioning are carried out by anchors. If there is water leakage from the waist beam, drill holes around the waist beam leakage point and fill it with grouting quick-setting grouting material.
进一步地,所述腰梁布置在所述支护桩远离所述基坑侧壁的一侧,在支护桩内预先修筑有多根锚筋,多根所述锚筋延伸出支护桩并穿设在所述腰梁内,并通过高压灌注机向锚筋、所述腰梁以及支护桩之间的空隙进行浆液灌注。Further, the waist beam is arranged on the side of the support pile away from the side wall of the foundation pit, a plurality of anchor bars are pre-built in the support pile, and the plurality of anchor bars extend out of the support pile and It is worn in the waist beam, and is poured into the gap between the anchor bar, the waist beam and the supporting pile by a high-pressure pouring machine.
进一步地,将三根钢绞线捆绑在所述一次注浆管的外周形成所述锚索,并且,沿所述钢绞线的长度方向,在三根所述钢绞线的外周捆扎有多个捆扎线组,多个所述捆扎线组均匀间隔布置。Further, three steel strands are bundled on the outer circumference of the primary grouting pipe to form the anchor cable, and along the length direction of the steel strands, a plurality of bundles are bundled on the outer circumference of the three steel strands A wire group, wherein a plurality of the binding wire groups are evenly spaced.
进一步地,在所述锚索上安装多个支护架,所述支护架的外周朝内凹陷形成凹陷槽,将三个所述钢绞线嵌入在所述凹陷槽内,沿所述锚索的横截面方向,三个所述钢绞线呈等边三角形布置,所述注浆管通孔布置在三个所述钢绞线通孔的中部,沿所述钢绞线的长度方向,多个所述支护架呈均匀间隔布置,所述支护架与所述捆扎线组交错布置。Further, a plurality of support brackets are installed on the anchor cable, the outer periphery of the support brackets is recessed inward to form a concave groove, and the three steel strands are embedded in the concave groove, along the anchor In the cross-sectional direction of the cable, the three steel strands are arranged in an equilateral triangle, and the through hole of the grouting pipe is arranged in the middle of the three through holes of the steel strand, along the length direction of the steel strand, A plurality of the support brackets are arranged at even intervals, and the support brackets and the binding wire group are arranged in a staggered manner.
进一步地,所述一次注浆管穿过支护架的中心,所述二次注浆管穿设在所述支护架的边部。Further, the primary grouting pipe passes through the center of the support frame, and the secondary grouting pipe passes through the edge of the support frame.
与现有技术相比,本发明提供的基坑砂层锚索自由段渗漏水的治理方法,通过在锚索的自由段缠绕防渗填充物,防渗填充物贴合在锚索孔的侧壁上,与锚索孔的结合更加紧密,在通过一次灌注与二次灌注,浆液附着在防渗填充物的外周,浆液凝固后,浆液与防渗填充物之间形成一体布置的防渗层,从而能起到更佳的防水防渗效果。Compared with the prior art, the present invention provides a method for treating water leakage in the free section of the anchor cable in the sand layer of the foundation pit. On the side wall, it is more closely combined with the anchor cable hole. After the first injection and the second injection, the slurry is attached to the outer periphery of the anti-seepage filler. After the slurry is solidified, an integrated anti-seepage arrangement is formed between the slurry and the anti-seepage filler. layer, so as to play a better waterproof and anti-seepage effect.
附图说明Description of drawings
图1是本发明提供的基坑砂层锚索自由段渗漏水的治理方法的施工步骤流程框图;Fig. 1 is the construction step flow chart of the treatment method of the seepage water in the free section of anchor cable in foundation pit sand layer provided by the present invention;
图2是本发明提供的基坑砂层锚索自由段渗漏水的治理方法的注浆立体示意图;Fig. 2 is the grouting three-dimensional schematic diagram of the treatment method for water leakage in the free section of the anchor cable of the foundation pit sand layer provided by the present invention;
图3是本发明提供的基坑砂层锚索自由段渗漏水的治理方法中注浆钻孔位置的主视图;Fig. 3 is the front view of the position of grouting drilling hole in the treatment method for water leakage in the free section of anchor cable in foundation pit sand layer provided by the present invention;
图4是本发明提供的基坑砂层锚索自由段渗漏水的治理方法中的注浆剖面图;Fig. 4 is the grouting sectional view in the treatment method for water leakage in the free section of the anchor cable of the foundation pit sand layer provided by the present invention;
图5是本发明提供的基坑砂层锚索自由段渗漏水的治理方法中的1-1断面的截面示意图;5 is a schematic cross-sectional view of section 1-1 in the method for treating water leakage in the free section of the anchor cable in the sand layer of the foundation pit provided by the present invention;
图6是本发明提供的基坑砂层锚索自由段渗漏水的治理方法中的的2-2断面的截面示意图;6 is a schematic cross-sectional view of the 2-2 section in the method for treating water leakage in the free section of the anchor cable in the sand layer of the foundation pit provided by the present invention;
图7是本发明提供的基坑砂层锚索自由段渗漏水的治理方法中的的3-3断面的截面示意图。7 is a schematic cross-sectional view of section 3-3 in the method for treating water leakage in the free section of the anchor cable in the sand layer of the foundation pit provided by the present invention.
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
以下结合具体实施例对本发明的实现进行详细的描述。The implementation of the present invention will be described in detail below with reference to specific embodiments.
本实施例的附图中相同或相似的标号对应相同或相似的部件;在本发明的描述中,需要理解的是,若有术语“上”、“下”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此附图中描述位置关系的用语仅用于示例性说明,不能理解为对本专利的限制,对于本领域的普通技术人员而言,可以根据具体情况理解上述术语的具体含义。The same or similar numbers in the drawings of this embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. structure and operation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation on this patent, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.
参照图1至7所示,为本发明提供的较佳实施例。Referring to Figures 1 to 7, it is a preferred embodiment provided by the present invention.
基坑砂层锚索自由段渗漏水的治理方法,包括以下施工步骤:The treatment method for the seepage water in the free section of the anchor cable in the sand layer of the foundation pit includes the following construction steps:
1)、在基坑的侧壁上钻挖锚索孔70;1), drill the
2)、在锚索10上布置有一次注浆管和二次注浆管,并将锚索10下放至锚索孔70内;2) Arrange the primary grouting pipe and the secondary grouting pipe on the
3)、锚索10包括自由段1010和锚固段1011,在自由段1010的外周上缠绕有防渗填充物30,当锚索10被下放在锚索孔70内时,锚固段1011全部置于锚索孔70内,自由段1010的下部置于锚索孔70内,自由段1010的上部置于锚索孔70的外部;3) The
4)、利用一次注浆管120进行第一次注浆;4), use a
5)、一次注浆完成后,利用二次注浆管130进行二次注浆,直至浆液从锚索孔70的孔口处溢出时,停止注浆;5) After the primary grouting is completed, the
6)、在自由段1010的上部设置有固定结构,待浆液凝固后,锚索10通过固定结构与支护桩20进行张拉固定;6), a fixed structure is provided on the upper part of the
7)、施工完成。7), the construction is completed.
上述提供的基坑砂层锚索10自由段1010渗漏水的治理方法,通过在锚索10的自由段1010缠绕防渗填充物30,防渗填充物30贴合在锚索孔70的侧壁上,与锚索孔70的结合更加紧密,在通过一次灌注与二次灌注,浆液附着在防渗填充物30的外周,浆液凝固后,浆液与防渗填充物30之间形成一体布置的防渗层,从而能起到更佳的防水防渗效果。In the above-mentioned treatment method for water leakage in the
在防渗填充物30的外周缠绕密封膜,并进行抽真空,将防渗填充物30保持束紧的状态,便于安装固定,同时还能起到良好的防水效果。A sealing film is wrapped around the outer periphery of the
密封膜的材料可以是塑料薄膜或是弹性橡胶膜。The material of the sealing film can be a plastic film or an elastic rubber film.
在基坑挖设前,先打入支护桩20,然后从基坑顶部91沿着支护桩20向下挖设出,直至挖设到基坑底部90,此时支护桩20的下端插设在基坑的下方。Before excavation of the foundation pit, the supporting
防渗填充物30可以采用采用工地上的废旧纤维,一方面可以起到对工地上废弃物的回收利用,另一方面,能降低施工成本。The
另一方面,自由段1010具有远离锚固段1011的上部以及接触锚固段1011的下部,在缠绕上述防渗填充物30时,从自由段1010的下部向上部方向开始缠绕,在缠绕厚度方面,自由段1010的下部在缠绕完成后的直径与锚索孔70的直径相同。On the other hand, the
另外,缠绕长度在1m以上。In addition, the winding length is 1 m or more.
沿自由段1010的后端至自由段1010的前端方向,所缠绕的防渗填充物30的厚度逐渐增大,这样的话,在下放锚索10时,随着自由段1010的缓缓进入到锚索孔70,自由段1010与锚索孔70的内壁之间的贴合越来越紧密,从而保障施工过程中锚索10与锚索孔70之间的紧密性。In the direction from the rear end of the
在步骤2)中,在下放锚索10时,将二次注浆管130的端头固定在锚固段1011的底端上,随着锚索10的下放,二次注浆管130下放至锚索孔70的底部。In step 2), when the
在步骤3)中,当锚固段1011的底端下放到锚索孔70的孔底时,通过一次注浆管120向锚索孔70内注浆,当浆液从锚索孔70的孔口处溢出时,停止注浆,并且沿背离孔底方向,将锚索10向外拉出0.25m,继续注浆。In step 3), when the bottom end of the
具体的,一次注浆管120的底部具有注浆开口,在注浆过程中,浆液直接通过一次注浆管120流入到锚索孔70的底部,随着浆液的不断堆积,浆液缓缓上升,直至浆液到达防渗填充物30处,并浸过防渗填充物30,从锚索孔70口出溢出时,即可停止注浆。Specifically, the bottom of the
自下而上进行注浆,可以浆液自下而上慢慢堆积,可以更全面地将将钻孔内的空隙填满,不留空隙、气泡,从而达到更佳的灌注效果。Grouting from the bottom up, the slurry can be slowly accumulated from bottom to top, and the voids in the borehole can be filled more comprehensively without leaving voids and air bubbles, so as to achieve a better perfusion effect.
一次注浆完成后,由于浆液有气泡或者锚索10等的干扰,很有可能会导致注浆不均匀或者仍存在有未被注浆的空隙,从而影响注浆效果,甚至为外界提供了漏水通路,因此,在一次注浆完成后,还需要再进行二次注浆,二次注浆使用二次注浆管130,二次注浆管130的管壁的四周具有多个开孔,这样,通过二次注浆,可以进一步填补一次注浆未填充满的空隙区域,从而使得锚索孔70内部的浆液灌注的更加致密,增强锚索孔70内浆液的强度,一方面将锚索10固定的更加紧密,另一方面,浆液内部孔隙率减小,能具有更好的防水效果。After the first grouting is completed, due to the interference of air bubbles in the slurry or the interference of
在下放二次注浆管130前,二次注浆管130上的开孔上贴附有多个封闭膜,在下放过程中,封闭膜可以实现二次注浆管130与土体之间的隔绝作用,从而避免外界土体进入到通过开孔进入到二次注浆管130内,对二次注浆管130造成阻塞等问题,在灌注过程中,在浆液压力的驱动下,封闭膜破裂,浆液由二次注浆管130进入到锚索孔70内。Before lowering the
在步骤4)中,沿朝向基坑侧壁方向,向固定结构上钻多个钻孔102,钻孔102环绕布置在锚索10的自由段1010的端头周围,并向钻孔102内打入多根朝向不同方向并且嵌入在基坑侧壁的土体中的注浆钢管101,注浆钢管101的管身具有多个钻孔,此时再向注浆钢管101内注入浆液,浆液通过注浆钢管101的钻孔朝向周围的土体流动,浆液凝固后,并与土体相结合,也就是说,通过锚索10可以从多个方向对支护桩20进行支护,增大与土层的接触面积,可以将孔口附近松散破碎的土层胶结成整体,使得对支护桩20的固定更加稳固。In step 4), drill a plurality of drill holes 102 on the fixed structure along the direction toward the side wall of the foundation pit, the drill holes 102 are arranged around the end of the
在步骤4)中,当一次注浆完成后,向注浆钢管101内进行注浆,直至浆液从注浆钢管101的孔口漏出,注浆完成,再用使用了固化剂配置而成的浆液对注浆钢管101的钢管口进行封堵,将钻孔102的孔口封实,不留空隙,这样可以避免水由注浆钢管101的孔口向注浆钢管101内部渗透。In step 4), after the first grouting is completed, grouting is performed into the
注浆钢管101的长度为3m。The length of the
上述一次注浆和二次注浆所用到的浆液为浆液液,而灌注注浆钢管101所使用到的浆液为使用固化剂配制而成的浆液。The slurry used for the above-mentioned primary grouting and secondary grouting is a slurry liquid, and the slurry used for the
固化剂的成分包括高效结构剂以及外加剂,高效结构剂与外加剂与水拌合形成固化浆体,空桩段300具有废浆液,固化浆体连同高压空气一起注入废浆液;高效结构剂占废浆液重量的10%~20%,水占废浆液的重量的10%~20%,外加剂占废浆液重量的0.5%~1.5%,高效结构剂对废浆液进行固化处理,同时辅以外加剂,增强固化的性能。The components of the curing agent include high-efficiency structural agent and admixture. The high-efficiency structural agent and the admixture are mixed with water to form a solidified slurry. The
在步骤5)中,固定结构为腰梁40,腰梁40固定在支护桩20上,锚索10的锚固段1011穿设在腰梁40上,并通过锚具42进行锚固、张拉,若出现从腰梁40渗漏水,则在腰梁40漏水点周围钻孔用注浆速凝灌浆料填塞。In step 5), the fixing structure is the
具体的,先将锚索的锚固段1011下放到锚索孔70内,通过一次注浆以及二次注浆将锚索固定在锚索孔70内,此时自由段1010置于锚索孔70的外部,待浆液凝固后,然后再将自由段1010从腰梁40的背面穿过,然后通过锚具70进行伸拉锚固,此时,由于自由段1010由后端之前端所缠绕的防渗填充物30的厚度逐渐增大,随着锚具70的拉伸,防渗填充物30可以更加紧密地与腰梁40进行贴合固定,增加固定过程中的紧密性。Specifically, the
在锚具42的下方设置有钢垫板43。A
注浆速凝灌浆料,是由水溶性高分子聚合物、表面活性物质等复合而成的粉末状灌浆料,具有很强的抗分散性和较好的流动性,实现水下的自流平、自密实。Grouting quick-setting grouting material is a powdered grouting material composed of water-soluble polymer, surface active substances, etc. self-consolidation.
腰梁40布置在支护桩20远离基坑侧壁的一侧,在支护桩20内预先修筑有多根锚筋44,多根锚筋44延伸出支护桩20并穿设在腰梁40内,并通过高压灌注机向锚筋44、腰梁40以及支护桩20之间的空隙进行浆液灌注。The
腰梁40具有朝向支护桩20布置的抵压面,将抵压面的表面凿毛,也就是将抵压面的表面凿成凹凸不平状,再通过锚具42与支护桩20固定连接,此时,腰梁40的抵压面抵压在支护桩20的外表面上;待固定完成后,通过高压灌注机向抵压面与支护桩20的外表面之间注入浆液。The
将三根钢绞线105捆绑在一次注浆管120的外周形成锚索10,并且,沿钢绞线105的长度方向,在三根钢绞线105的外周捆扎有多个捆扎线组300,多个捆扎线组300均匀间隔布置。Three
在钢绞线105的外周套设有牛筋套管1051,可以对钢绞线105起到防腐的作用。A
一次注浆管120为软性管状材料,将一次注浆管120固定在三根钢绞线105的中部,在下放钢绞线105的过程中,一方面,可以避免受到土层的干扰,浆液流动过程中更加畅通无阻,另一方面,还可以起到下方过程中对一次注浆管120的导向、定位的作用。The
在锚索10上安装多个支护架310,支护架310的外周朝内凹陷形成凹陷槽,将三个钢绞线105嵌入在凹陷槽内,沿锚索10的横截面方向,三个钢绞线105呈等边三角形布置,注浆管通孔布置在三个钢绞线105通孔的中部,沿钢绞线105的长度方向,多个支护架310呈均匀间隔布置,支护架310与捆扎线组300交错布置,这样的话,在锚索10的长度方向上是呈宽窄交错布置的,具体的,有支护架310的部分锚索10的宽度较宽,有捆扎线组300的部分锚索10的截面较小,在缠绕防渗填充物30时,从捆扎线组300处开始向支护架310方向缠绕,捆扎线组300处的缠绕厚度以缠绕后的直径与锚索孔70直径一致为准,当缠绕至支护架310处后,继续缠绕,朝向下一个捆扎线组300方向缠绕,直至缠绕长度满足设计要求。A plurality of
在缠绕过程中,由于锚索10的粗细不均匀,因此可以与防渗填充物30之间结合的更加紧固,不易在锚索10上滑动,固定效果更佳。During the winding process, since the thickness of the
在锚索10的最底端设置有导向帽107,导向帽107呈倒锥形布置,在下放锚索10过程中,可以起到对锚索10牵引、导向的作用。The bottom end of the
一次注浆管120穿过支护架310的中心,一次注浆管120同时也传射过捆扎线组300的中心,二次注浆管130穿设在支护架310的边部,这样,通过一次注浆管120进行一次注浆与通过二次注浆管130进行注浆的覆盖范围更大,可以将浆液更充分地灌注在锚索孔70内。The
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010019651.0A CN111236244A (en) | 2020-01-08 | 2020-01-08 | Method for treating water leakage of free section of anchor cable on sand layer of foundation pit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010019651.0A CN111236244A (en) | 2020-01-08 | 2020-01-08 | Method for treating water leakage of free section of anchor cable on sand layer of foundation pit |
Publications (1)
Publication Number | Publication Date |
---|---|
CN111236244A true CN111236244A (en) | 2020-06-05 |
Family
ID=70863946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010019651.0A Pending CN111236244A (en) | 2020-01-08 | 2020-01-08 | Method for treating water leakage of free section of anchor cable on sand layer of foundation pit |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111236244A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113279404A (en) * | 2021-06-24 | 2021-08-20 | 中国建设基础设施有限公司 | Tension-shear coupling compensation anti-leakage type prestressed anchor rod and construction method |
CN113529703A (en) * | 2021-06-18 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Double-liquid sealing grouting leakage-stopping construction method for foundation pit support anchor cable leakage |
CN113529702A (en) * | 2021-06-18 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Foundation pit support anchor cable seepage double-liquid sealing grouting leakage stoppage construction structure |
CN114809007A (en) * | 2022-04-25 | 2022-07-29 | 中铁一局集团第五工程有限公司 | A kind of prestressed anchor cable using mould bag to prevent seepage |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102121248A (en) * | 2010-01-07 | 2011-07-13 | 贵州省交通规划勘察设计研究院 | Method for reinforcing and fixing sloping surface of prestressed anchorage element |
JP5002517B2 (en) * | 2008-04-04 | 2012-08-15 | 株式会社タニガキ建工 | Fixing hardware, slope stabilization structure and slope stabilization method using the same |
CN205530282U (en) * | 2016-03-26 | 2016-08-31 | 安徽同济建设集团有限责任公司 | Prestressed anchorage cable |
CN106320346A (en) * | 2016-08-24 | 2017-01-11 | 陕西建工第六建设集团有限公司 | Construction method for supporting deep foundation pit through grouting after pile arrangement and anchor cable mounting |
CN108411912A (en) * | 2018-05-03 | 2018-08-17 | 大连理工大学 | A kind of convenient method of bolt stress slip casting |
-
2020
- 2020-01-08 CN CN202010019651.0A patent/CN111236244A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5002517B2 (en) * | 2008-04-04 | 2012-08-15 | 株式会社タニガキ建工 | Fixing hardware, slope stabilization structure and slope stabilization method using the same |
CN102121248A (en) * | 2010-01-07 | 2011-07-13 | 贵州省交通规划勘察设计研究院 | Method for reinforcing and fixing sloping surface of prestressed anchorage element |
CN205530282U (en) * | 2016-03-26 | 2016-08-31 | 安徽同济建设集团有限责任公司 | Prestressed anchorage cable |
CN106320346A (en) * | 2016-08-24 | 2017-01-11 | 陕西建工第六建设集团有限公司 | Construction method for supporting deep foundation pit through grouting after pile arrangement and anchor cable mounting |
CN108411912A (en) * | 2018-05-03 | 2018-08-17 | 大连理工大学 | A kind of convenient method of bolt stress slip casting |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113529703A (en) * | 2021-06-18 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Double-liquid sealing grouting leakage-stopping construction method for foundation pit support anchor cable leakage |
CN113529702A (en) * | 2021-06-18 | 2021-10-22 | 深圳市工勘岩土集团有限公司 | Foundation pit support anchor cable seepage double-liquid sealing grouting leakage stoppage construction structure |
CN113529702B (en) * | 2021-06-18 | 2023-02-28 | 深圳市工勘岩土集团有限公司 | Foundation pit support anchor cable seepage double-liquid sealing grouting leakage stoppage construction structure |
CN113529703B (en) * | 2021-06-18 | 2023-02-28 | 深圳市工勘岩土集团有限公司 | Double-liquid sealing grouting leakage-stopping construction method for foundation pit support anchor cable leakage |
CN113279404A (en) * | 2021-06-24 | 2021-08-20 | 中国建设基础设施有限公司 | Tension-shear coupling compensation anti-leakage type prestressed anchor rod and construction method |
CN114809007A (en) * | 2022-04-25 | 2022-07-29 | 中铁一局集团第五工程有限公司 | A kind of prestressed anchor cable using mould bag to prevent seepage |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111236244A (en) | Method for treating water leakage of free section of anchor cable on sand layer of foundation pit | |
US10550537B2 (en) | Self-drainage anchor cable system for slope protection and construction method thereof | |
CN106223341B (en) | Marine large diameter steel pipe pile slip casting around pile device and its construction method | |
CN109356162B (en) | OPT occlusion pile side grouting water stopping method and grouting pipe device | |
CN207739264U (en) | A kind of Grouting Pipe | |
CN109630803B (en) | Pipeline repairing device, system and method | |
CN110130324B (en) | Steel pipe mini pile and construction method thereof | |
CN112647498B (en) | Construction method for anti-floating anchor cable penetrating through water-rich layer | |
CN112813972A (en) | Bag type enlarged footing pressure-bearing type anchor rod system | |
CN111945726A (en) | Construction method of strong unloading broken rock mass prestressed anchor cable | |
JP2024505110A (en) | Anchor cable for grouting with large deformation, constant resistance and support function | |
CN112252339A (en) | Upward full-length bonding anchor cable hole subsection grout stopping structure and method | |
CN213508499U (en) | Narrow and small space upward formula full length bonding anchor rope downthehole segmentation of formula ends thick liquid structure | |
JP2023519443A (en) | Waterproof structure of floating prevention anchor cable and its construction method | |
CN210315518U (en) | A kind of steel pipe micro pile | |
CN115262537A (en) | Karst development area cast-in-situ bored pile forming device and construction method | |
KR20040110204A (en) | Earth anchor including a duplex grouting pipe and the earth anchor construction method using the same | |
WO2024139801A1 (en) | Isolation protection system for safe operation of gas tunnel | |
KR101303534B1 (en) | Apparatus for yieldable arch umbrella arch reinforcement and construction method for yieldable arch umbrella arch reinforcement | |
CN217710697U (en) | Anti-leakage structure for free section of anchor cable of sand layer of foundation pit | |
CN206521773U (en) | Lock water leakage plugging structure after prestressed anchor cable tensioning | |
CN110761293B (en) | Foundation pit anchor cable orifice device and foundation pit anchor cable orifice construction method | |
CN210827454U (en) | Waterproof construction of deep basal pit anti-floating anchor rod node | |
CN213450433U (en) | Primary tensioning structure for secondary grouting of unbonded anchor cable upwards in hole | |
CN116005659A (en) | Construction method for preventing leakage of pre-buried pipe of foundation pit supporting pre-stressed anchor cable |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200605 |
|
RJ01 | Rejection of invention patent application after publication |