CN113235591A - Expansion shell type anchor cable and construction method thereof - Google Patents
Expansion shell type anchor cable and construction method thereof Download PDFInfo
- Publication number
- CN113235591A CN113235591A CN202110571525.0A CN202110571525A CN113235591A CN 113235591 A CN113235591 A CN 113235591A CN 202110571525 A CN202110571525 A CN 202110571525A CN 113235591 A CN113235591 A CN 113235591A
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- plate
- grouting
- anchor cable
- anchor
- steel strand
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000004873 anchoring Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000007569 slipcasting Methods 0.000 claims description 7
- 239000011440 grout Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
An expansion shell type anchor cable and a construction method thereof relate to a grouting anchoring device in capital construction engineering and a construction method thereof. The device comprises an expander, a pressure bearing plate assembly and a grouting mechanism; the key technology is that the expander comprises a connecting bottom plate, an arc wing plate and a wedge plate, wherein the wedge plate is welded in the middle of the arc wing plate; the bearing plate assembly comprises a steel strand, a sliding base plate and an anchor head; the grouting mechanism comprises a primary grouting pipe, a secondary grouting pipe and a sealing bag, the primary grouting pipe is arranged above the connecting bottom plate, and the sealing bag is arranged on the connecting bottom plate. The construction method comprises anchor cable manufacturing, anchoring section grouting, steel strand tensioning and secondary grouting. The invention has the beneficial effects that: the expander and the bearing plate assembly are arranged, and a mechanical tensioning wedge-shaped mechanism is adopted to form an expansion shell anchor cable expanding head. Compared with a high-pressure rotary spraying bag type enlarged head anchor cable, the anchor cable is simple in structure, construction procedures are reduced, construction efficiency is improved, the using amount of slurry is small, and construction cost is effectively reduced.
Description
The technical field is as follows:
an expansion shell type anchor cable and a construction method thereof relate to a grouting anchoring device in capital construction engineering and a construction method thereof.
Background art:
the anchor cable with the enlarged head has higher bearing capacity, smaller deformation and high reliability, and has greater advantages compared with the traditional anchor cable, so the anchor cable with the enlarged head is widely applied to foundation pit support. The anti-pulling force of the anchor rope with the enlarged head mainly comprises two parts, wherein the part is the side resistance between the anchoring section and the contact soil body and comprises a common anchoring section and an enlarged head section of the anchor rope; the other part is end resistance provided by soil mass on the front end surface of the expansion head to the expansion head, and the special stress mode effectively improves the pulling resistance of the anchor cable. At present, the domestic expanded head anchor cable mainly adopts a high-pressure rotary spraying bag type, the technology is mature, the bearing capacity is high through tests, and the expanded head anchor cable is applied to foundation pit engineering and anti-floating anchoring. The high-pressure rotary spraying bag type enlarged head anchor cable is high in cost due to the fact that the bag needs to be specially processed, and meanwhile, the construction process is complex, so that the overall cost of the anchor cable is high, and certain difficulty is brought to popularization.
The invention content is as follows:
the invention aims to solve the problems and provides an expanded head anchor cable with simple structure and reduced construction procedures and a construction method thereof. The technical scheme is as follows:
an expansion shell type anchor cable comprises an expander, a bearing plate assembly and a grouting mechanism; the key technology is that the expander comprises a connecting bottom plate, an arc wing plate and a wedge plate, hinge mechanisms are uniformly distributed below the connecting bottom plate, and the wedge plate is welded in the middle of the arc wing plate; the bearing plate assembly comprises a steel strand, a sliding base plate and an anchor head, wherein the anchor head is positioned below the sliding base plate, and the steel strand penetrates through the sliding base plate and fixes one end of the steel strand through the anchor head; the grouting mechanism comprises a primary grouting pipe, a secondary grouting pipe and a sealing bag, the primary grouting pipe is arranged above the connecting bottom plate, the sealing bag is arranged on the connecting bottom plate, the secondary grouting pipe penetrates through the connecting bottom plate and is arranged with the sliding base plate, and the pipe orifice of the secondary grouting pipe, the arc wing plate and the wedge plate are arranged in the sealing bag.
And a steel strand through hole is arranged on the connecting bottom plate, and a sealing ring is arranged in the steel strand through hole.
The periphery of the sliding base plate is provided with rectangular notches, and the notches are matched with the wedge-shaped plate.
The construction method of the expansion shell type anchor cable has the key technology that the construction method comprises the following steps:
1) manufacturing an anchor cable, namely fixing one end of a steel strand through an anchor head, respectively penetrating the steel strand through a sliding base plate and a connecting bottom plate to enable the anchor head to be in close contact with the lower end of the sliding base plate, adjusting the sliding base plate to return, and then sleeving a sealing bag on the connecting bottom plate;
2) installing the assembled anchor cable into an anchor hole of the foundation pit, and grouting an anchoring section through a primary grouting pipe after the anchor cable extends deep to the designed depth;
3) when the strength of the anchoring section reaches 75% of the design strength or 28 days later, tensioning and locking the steel strand;
4) and after the steel strand is tensioned and locked, grouting is immediately carried out through a secondary grouting pipe, so that the sealing bag is filled with grout, and after the secondary grouting is finished, anchor sealing treatment is carried out on the anchor hole of the foundation pit.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the arrangement of the expander and the bearing plate assembly, the sliding base plate is driven by the tensioning steel strand to change the angle of the wedge-shaped surface of the wedge-shaped plate, and the arc-shaped wing plate is expanded and contracted by the up-and-down sliding of the wedge-shaped plate, namely, the expanding head of the expanding shell anchor cable is formed by adopting a mechanical tensioning wedge-shaped mechanism. Compared with a high-pressure rotary spraying bag type enlarged head anchor cable, the anchor cable is simple in structure, construction procedures are reduced, construction efficiency is improved, the using amount of slurry is small, and construction cost is effectively reduced;
2. the sealing bag is arranged outside the device, can be used as a protection device for the expander and the bearing plate assembly, can effectively avoid mechanism blocking failure caused by the intrusion of foreign matters in the lowering process of the anchor cable, and ensures the construction quality of the expanded head of the expanded shell anchor cable.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial top view of FIG. 1;
FIG. 3 is a partial bottom view of FIG. 1;
FIG. 4 is a schematic view of a hole forming structure of the present invention;
FIG. 5 is a schematic view of a grouting structure for installation of an anchor cable according to the present invention;
FIG. 6 is a schematic diagram of an anchor cable tensioning configuration after the first grouting of the present invention;
FIG. 7 is a schematic view of a secondary grouting structure according to the present invention.
The specific implementation mode is as follows:
referring to fig. 1 to 3, an expansion shell type anchor cable includes an expander 1, a bearing plate assembly 2 and a grouting mechanism 3; the key technology is that the expander 1 comprises a connecting bottom plate 12, an arc wing plate 14 and a wedge plate 15, hinge mechanisms 13 are uniformly distributed below the connecting bottom plate 12 and are fixed in a welding mode and used for connecting the arc wing plate 14 with the connecting bottom plate 12, and the wedge plate 15 is welded in the middle of the arc wing plate 14; the bearing plate assembly 2 comprises a steel strand 21, a sliding backing plate 22 and an anchor head 23, the anchor head 23 is positioned below the sliding backing plate 22, the steel strand 21 penetrates through the sliding backing plate 22 and fixes one end of the steel strand 21 through the anchor head 23, and the angle of a wedge surface of the wedge plate 15 is changed by stretching the sliding backing plate 22, so that the purpose of adjusting the expansion size range of the arc wing plate 14 is realized; grouting mechanism 3 includes primary grouting pipe 33, secondary grouting pipe 31 and seal bag 32, primary grouting pipe 33 is installed in connecting bottom plate 12 top, be used for stock superstructure slip casting, seal bag 32 is installed on connecting bottom plate 12, secondary grouting pipe 31 passes connecting bottom plate 12 and the installation of slip backing plate 22, secondary grouting pipe 31 mouth of pipe and circular arc pterygoid lamina 14, wedge plate 15 is located seal bag 32, seal bag 32 can be as the protection device of expander 1 and bearing plate assembly 2, avoid the anchor rope at the hole in-process foreign matter invasion down, cause the destruction to internal mechanism, can guarantee also that secondary grouting thick liquid can not be omitted, reduce material cost.
The steel strand through hole is installed on the connecting bottom plate 12, the sealing ring 11 is arranged in the steel strand through hole, and the sealing ring 11 can seal and isolate the upper part and the lower part of the connecting bottom plate 12 to avoid the upper slurry from invading the sealing bag 32.
Rectangular notches are formed in the periphery of the sliding base plate 22, the notches are matched with the wedge-shaped plate 15, and the arc-shaped wing plates 14 are expanded and contracted through up-and-down sliding of the wedge-shaped surfaces.
The construction method of the expansion shell type anchor cable has the key technology that the construction method comprises the following steps:
1) manufacturing an anchor cable, referring to fig. 1, fixing one end of a steel strand 21 through an anchor head 23, respectively penetrating the steel strand 21 through a sliding pad 22 and a connecting base plate 12, enabling the anchor head 23 to be in close contact with the lower end of the sliding pad 22, adjusting the sliding pad 22 to return, and then sleeving a sealing bag 32 on the connecting base plate 12;
2) installing the assembled anchor cable into an anchor hole of the foundation pit 4 shown in fig. 4, and grouting an anchoring section through a primary grouting pipe 33 as shown in fig. 5 after the anchor cable extends deep to the designed depth;
3) when the strength of the anchoring section reaches 75% of the design strength or 28 days later, tensioning and locking the steel strand 21 as shown in fig. 6;
4) after the steel strand 21 is tensioned and locked, grouting is immediately performed through a secondary grouting pipe 31 as shown in fig. 7, so that the sealing bag 32 is filled with grout 5, and after the secondary grouting is completed, the anchor hole of the foundation pit is sealed and anchored.
The primary grouting pressure in the step 2) is 0.5-0.8 MPa, and the secondary grouting pressure in the step 4) is 0.8-1.5 MPa.
Claims (5)
1. An expansion shell type anchor cable comprises an expander (1), a bearing plate assembly (2) and a grouting mechanism (3); the dilator is characterized in that the dilator (1) comprises a connecting bottom plate (12), an arc wing plate (14) and a wedge-shaped plate (15), hinge mechanisms (13) are uniformly distributed below the connecting bottom plate (12), and the wedge-shaped plate (15) is arranged in the middle of the arc wing plate (14); the bearing plate assembly (2) comprises a steel strand (21), a sliding backing plate (22) and an anchor head (23), wherein the anchor head (23) is positioned below the sliding backing plate (22), and the steel strand (21) penetrates through the sliding backing plate (22) and fixes one end of the steel strand (21) through the anchor head (23); slip casting mechanism (3) are including primary slip casting pipe (33), secondary slip casting pipe (31) and sealing bag (32), and primary slip casting pipe (33) are installed in connecting bottom plate (12) top, and sealing bag (32) are installed on connecting bottom plate (12), and secondary slip casting pipe (31) are passed and are connected bottom plate (12) and slip backing plate (22) installation, and secondary slip casting pipe (31) mouth of pipe and circular arc pterygoid lamina (14), wedge board (15) are located sealing bag (32).
2. An anchor cable as claimed in claim 1, in which a steel strand through hole is provided in the connecting base plate (12), and a sealing ring (11) is provided in the steel strand through hole.
3. An anchor rope in the form of an expander as claimed in claim 1, in which the sliding pad (22) is provided with rectangular notches around its periphery, the notches engaging the wedge plate (15).
4. A method of constructing an anchor cable of the expanding type as claimed in claim 1, including the steps of:
1) manufacturing an anchor cable, namely fixing one end of a steel strand (21) through an anchor head (23), respectively penetrating the steel strand (21) through a sliding base plate (22) and a connecting base plate (12), enabling the anchor head (23) to be in close contact with the lower end of the sliding base plate (22), adjusting the sliding base plate (22) to return, and then sleeving a sealing bag (32) on the connecting base plate (12);
2) the assembled anchor cable is installed in an anchor hole of the foundation pit, and after the anchor cable extends deep to the designed depth, grouting is carried out on the anchoring section through a primary grouting pipe (33);
3) when the strength of the anchoring section reaches 75% of the design strength or 28 days later, tensioning and locking the steel strand (21);
4) and after the steel strand (21) is tensioned and locked, grouting is immediately carried out through a secondary grouting pipe (31) to enable the sealing bag to be full of grout, and after secondary grouting is finished, anchor sealing treatment is carried out on the anchor hole of the foundation pit.
5. The construction method of the expanding anchor cable according to claim 4, wherein the primary grouting pressure in step 2) is 0.5-0.8 MPa, and the secondary grouting pressure in step 4) is 0.8-1.5 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571525.0A CN113235591A (en) | 2021-05-25 | 2021-05-25 | Expansion shell type anchor cable and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571525.0A CN113235591A (en) | 2021-05-25 | 2021-05-25 | Expansion shell type anchor cable and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113235591A true CN113235591A (en) | 2021-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110571525.0A Pending CN113235591A (en) | 2021-05-25 | 2021-05-25 | Expansion shell type anchor cable and construction method thereof |
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| Country | Link |
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| CN (1) | CN113235591A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737270A (en) * | 2005-07-08 | 2006-02-22 | 吴德兴 | Shell expand anchorage head and anchor bar |
| CN102748047A (en) * | 2012-07-17 | 2012-10-24 | 安徽省煤炭科学研究院 | Expansion-shell anchor rope |
| CN202673309U (en) * | 2012-01-01 | 2013-01-16 | 谢理想 | Combination type high-strength grouting anchor cable |
| CN103133026A (en) * | 2013-03-26 | 2013-06-05 | 安徽理工大学 | Novel expansion shell inverted wedge type grouting anchor rod |
| CN104563106A (en) * | 2014-12-30 | 2015-04-29 | 中国建筑第八工程局有限公司 | Rotary spraying anchor rope drill body and construction process of rotary spraying anchor rope |
| CN104594348A (en) * | 2015-01-27 | 2015-05-06 | 安徽同济建设集团有限责任公司 | Expanded head capsule type anchor rod and construction method thereof |
| CN106592588A (en) * | 2016-11-22 | 2017-04-26 | 成都四海岩土工程有限公司 | Bit-expanded anchor rope construction method by using mechanical hole expansion |
| CN108086334A (en) * | 2017-12-13 | 2018-05-29 | 大连交通大学 | A kind of recyclable quick prestress anchorage cable and its construction method |
| CN109538265A (en) * | 2017-09-22 | 2019-03-29 | 吴占瑞 | Tunnel overlength enlarged footing anchor cable and its method for protecting support |
| CN111676969A (en) * | 2020-05-29 | 2020-09-18 | 重庆建工第四建设有限责任公司 | Foundation pit bag type enlarged footing anchor cable supporting structure and construction method |
| CN111877334A (en) * | 2020-08-26 | 2020-11-03 | 中交天津港湾工程研究院有限公司 | Pre-tensioned bottom-expanding anchor cable and construction method for constructing supporting structure by using same |
| CN217556905U (en) * | 2021-05-25 | 2022-10-11 | 成都四海岩土工程有限公司 | Expansion shell type anchor cable |
-
2021
- 2021-05-25 CN CN202110571525.0A patent/CN113235591A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737270A (en) * | 2005-07-08 | 2006-02-22 | 吴德兴 | Shell expand anchorage head and anchor bar |
| CN202673309U (en) * | 2012-01-01 | 2013-01-16 | 谢理想 | Combination type high-strength grouting anchor cable |
| CN102748047A (en) * | 2012-07-17 | 2012-10-24 | 安徽省煤炭科学研究院 | Expansion-shell anchor rope |
| CN103133026A (en) * | 2013-03-26 | 2013-06-05 | 安徽理工大学 | Novel expansion shell inverted wedge type grouting anchor rod |
| CN104563106A (en) * | 2014-12-30 | 2015-04-29 | 中国建筑第八工程局有限公司 | Rotary spraying anchor rope drill body and construction process of rotary spraying anchor rope |
| CN104594348A (en) * | 2015-01-27 | 2015-05-06 | 安徽同济建设集团有限责任公司 | Expanded head capsule type anchor rod and construction method thereof |
| CN106592588A (en) * | 2016-11-22 | 2017-04-26 | 成都四海岩土工程有限公司 | Bit-expanded anchor rope construction method by using mechanical hole expansion |
| CN109538265A (en) * | 2017-09-22 | 2019-03-29 | 吴占瑞 | Tunnel overlength enlarged footing anchor cable and its method for protecting support |
| CN108086334A (en) * | 2017-12-13 | 2018-05-29 | 大连交通大学 | A kind of recyclable quick prestress anchorage cable and its construction method |
| CN111676969A (en) * | 2020-05-29 | 2020-09-18 | 重庆建工第四建设有限责任公司 | Foundation pit bag type enlarged footing anchor cable supporting structure and construction method |
| CN111877334A (en) * | 2020-08-26 | 2020-11-03 | 中交天津港湾工程研究院有限公司 | Pre-tensioned bottom-expanding anchor cable and construction method for constructing supporting structure by using same |
| CN217556905U (en) * | 2021-05-25 | 2022-10-11 | 成都四海岩土工程有限公司 | Expansion shell type anchor cable |
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