CN114263172A - Pressure-bearing bag type expanded anchor cable and sash beam construction method - Google Patents
Pressure-bearing bag type expanded anchor cable and sash beam construction method Download PDFInfo
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- CN114263172A CN114263172A CN202111544347.9A CN202111544347A CN114263172A CN 114263172 A CN114263172 A CN 114263172A CN 202111544347 A CN202111544347 A CN 202111544347A CN 114263172 A CN114263172 A CN 114263172A
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Abstract
The invention relates to a pressure-bearing bag type expanded anchor cable and a sash beam construction method. Compared with the traditional anchor cable, the anchor section and the free section of the anchor cable are completely distinguished, the force transmission system and the bearing mechanism of the anchor cable structure are simple and clear, and the calculation value of the single anchor anchoring force and the determination of the working load are more accurate. The length of the anchoring section and the length of the anchor rod body are greatly shortened, the loss of construction materials and equipment is reduced, and the economic efficiency is higher; compared with the existing soil layer expansion anchor rods, the anchoring section anchor bar is completely centered, the force transmission and stress mechanism has more advantages, and the integral stability and strength of the anchor bar are further improved due to the action of the framework.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a pressure-bearing bag type expansion anchor cable and a sash beam construction method.
Background
The existing integrated double-bag type expanded anchor rod is characterized in that a positioning head is arranged at the front end of the anchor rod, two ends of the anchor rod are respectively fixed with a bag by a pair of pressing hoops, the diameter and the length of the bag on the rod body of the head protection end are larger than those of a hole sealing bag at the other end, one side of a clamping head outside the pressing hoops at the two ends of the hole sealing bag is provided with a grouting pipe, the other side of the clamping head is provided with a slurry discharge pipe, the grouting pipe and the expanded bag are internally provided with an explosion valve, a water-gas separation filter valve is arranged between the two bags on the slurry discharge pipe, and a one-way grouting valve is arranged on the grouting pipe in the hole sealing bag. Both bags are made of reverse osmosis anti-corrosion cloth. Although the structure improves the anti-pulling force and the hole sealing quality of the anchoring body, the practice shows that the anti-pulling force of the structure does not exceed 600KN at most, and the structure cannot be applied to the reinforcement of large building foundations with the anti-pulling force exceeding 600 KN.
In the northwest of Gansu province, landforms are mostly hilly mountains, most of highways have a large number of side slopes to be stably treated, and the side slopes with dangerous terrain cannot reach ideal standards by adopting a traditional treatment mode. For example, the inlet of the Xigu No. 2 tunnel is positioned at the side edge of the loess beam at the south side of the JinXiling garden in the Xigu area; the exit is located at the edge of the loess beam at the southeast side of the west temple ditch. The tunnel passes through the V-level and VI-level terraces of the yellow river as a base terrace, the base surface of the tunnel is exposed in a temple ditch, the elevation is about 1669m, the base is a chalk-based sandstone mud-sandwiched rock stratum, the thickness of the gravel layer is 3-5 m, river overflow beach silt with obvious horizontal stratification is about 10m thick, and the top of the river overflow beach silt is covered with 100-110 m weathered loess. The tunnel site area belongs to the loess beam area, and height above sea level 1710 ~ 1807m, about 90m of the biggest slope height, the top of a slope is mild, and the width is about 200 m. The loess beams develop in the valley of two wings, and are deeply cut. The inlet and outlet slopes are steep, the inlet is 30-40 degrees, the outlet is 40-45 degrees, and the loess cave is formed, so that the stability is poor. And a Jinxiling park is arranged above the side and upward slope of the entrance of the Xigu No. 2 tunnel right line, and protective measures must be made to ensure the stability and stability of the side and upward slope and ensure the operation safety of the Jinxiling park and the expressway.
Therefore, it is urgently needed to invent an anchor cable and a construction method thereof to solve the technical problems.
Disclosure of Invention
The invention provides a pressure-bearing bag type expanded anchor cable with a simple structure and uniform and stable stress and a sash beam construction method, which aim to solve the problems in the prior art.
According to one aspect of the invention, a pressure-bearing bag type expansion anchor cable is provided, which comprises an anchor rod, a bag body, two positioning anchor heads, a lock, a steel pipe and a grouting pipe, wherein the two locks are respectively arranged at two ends of the steel pipe, the grouting pipe and the anchor rod are sleeved in the steel pipe, a grouting hole is formed in the steel pipe, two ends of the bag body are locked and sealed by the lock, the positioning anchor heads are arranged at the end of the steel pipe, a framework is arranged in the bag body, the framework comprises a plurality of longitudinal frameworks and radial frameworks which are uniformly arranged, the radial frameworks are uniformly arranged at intervals along the length direction of the longitudinal frameworks, the longitudinal frameworks comprise connecting rods and connecting rods, lock catches are arranged at the tail ends of the connecting rods and the connecting rods, one ends of the connecting rods are fixedly connected with the lock, the lock catches at the other ends of the connecting rods are inserted into the connecting rods, one ends of the connecting rods are fixedly connected with the lock, the lock catch at the other end of the connecting rod is inserted into the connecting rod.
On the basis of the scheme, the radial framework is preferably annular, and the middle part of the radial framework is provided with an elastic compression body.
On the basis of the scheme, preferably, the grouting pipe is provided with a reverse flow valve, and the steel pipe is also internally provided with an air outlet pipe.
The invention also provides a construction method of the pressure-bearing bag type expanded anchor cable sash beam, which comprises the following steps:
step 1, cleaning a slope surface, drilling holes at fixed points on site, and cleaning forming holes;
and 4, tensioning the anchor cable by adopting tensioning equipment when the concrete strength of the anchoring body and the pedestal reaches more than 80% of the designed strength, and sealing, backfilling and grouting.
Preferably, based on the above scheme, the step 2 specifically comprises
Step 21, arranging a scaffold platform around the forming hole, installing a guide wheel above the axis of the anchor hole, installing a guide cap at the end of the anchor cable, manually and uniformly propelling, and directly feeding the anchor cable into the forming hole to be installed to the designed depth;
and step 22, grouting the anchoring section by adopting 1:1 pure cement slurry, wherein the grouting adopts cement with the strength grade of 32.5, in the grouting process, firstly feeding compressed air into the hole, opening the grouting hole, then continuously performing grouting from bottom to top, and slowly pulling up the grouting pipe along with the injection of the slurry to ensure that the mortar of the anchoring section of the anchor rope is full, and the grouting length of the anchoring section meets the design requirement.
Preferably, on the basis of the scheme, in the construction process in the step 3, the steel bar joints are staggered, the number of the steel bar joints with the same section does not exceed 1/2 of the total number of the steel bars, and the distance between the sections with the welded joints is not less than 1 m.
The pressure-bearing bag type expanded anchor cable adopts a bag type expanded anchor cable structure, and an expanded end is formed at the top of the anchor cable, so that the stability of the side slope sash beam is ensured under stress. Compared with the traditional anchor cable, the anchor section and the free section of the anchor cable are completely distinguished, the force transmission system and the bearing mechanism of the anchor cable structure are simple and clear, and the calculation value of the single anchor anchoring force and the determination of the working load are more accurate.
Meanwhile, compared with the traditional anchor cable, the length of the anchoring section and the length of the anchor rod body are greatly shortened, the loss of construction materials and equipment is reduced, and the economic efficiency is higher; compared with the existing soil layer expansion anchor rods, the anchoring section anchor bar is completely centered, the force transmission and stress mechanism has more advantages, and the integral stability and strength of the anchor bar are further improved due to the action of the framework.
Drawings
FIG. 1 is an internal structure view of a pressure-bearing bladder type expansion anchor cable according to the present invention;
FIG. 2 is a structural diagram of a pressure-bearing bladder type expansion anchor cable of the present invention;
fig. 3 is a flow chart of the construction method of the pressure-bearing bag type expanded anchor cable and sash beam of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, and referring to fig. 2, the pressure-bearing bag type expansion anchor cable of the present invention comprises an anchor rod 1, a bag body 2, a positioning anchor head 3, two locks 4, a steel tube 5 and a grouting tube 6, wherein the two locks 4 are respectively installed at two ends of the steel tube 5, the grouting tube 6 and the anchor rod 1 are sleeved in the steel tube 5, the steel tube 5 is provided with grouting holes 7, two ends of the bag body 2 are tightly locked and sealed by the locks 4, the positioning anchor head 3 is installed at an end of the steel tube 5, the bag body 2 is internally provided with a framework 8, the framework 8 comprises a plurality of longitudinal frameworks 9 and radial frameworks 10, the radial frameworks 10 are uniformly arranged at intervals along a length direction of the longitudinal frameworks 9, the longitudinal frameworks 9 comprise connecting rods 11 and connecting rods 12, the tail ends of the connecting rods 11 and the connecting rods 12 are respectively provided with a lock catch 13, one end of the connecting rod 11 is fixedly connected with the lock 4, the lock catch 13 at the other end of the connecting rod 11 is inserted into the connecting rod 12, one end of the connecting rod 12 is fixedly connected with the lockset 4, and the lock catch 13 at the other end of the connecting rod 12 is inserted into the connecting rod 11.
When in use, the positioning anchor head 3 is positioned in the hole, concrete is conveyed into the steel pipe 5 through the grouting hole 7 and then is filled into the capsule body 2 through the grouting hole 7, under the action of concrete, the bag body 2 is expanded to press the surrounding soil body to improve the strength, thereby greatly improving the ultimate bearing capacity of the single anchor rod 1 under the end bearing effect of the expanded cement paste squeezing body, during the expansion of the balloon 2, the connecting rod 11 and the connecting rod 12 slide relatively, so that the length of the connecting rod 11 and the connecting rod 12 reaches the maximum to satisfy the expansion, the radial skeleton 10 is annular, and an elastic compression body 14 is arranged in the middle of the radial skeleton 10, that is, the elastic compression body 14 may be formed by folding a spring steel bar or may be a compression spring, and under the action of concrete, the radial skeleton 10 is deformed to increase the overall diameter thereof, thereby forming the skeleton 8 to increase the overall strength thereof.
Furthermore, the invention is provided with a reflux valve 15 on the grouting pipe 6, and an air outlet pipe 16 is also arranged in the steel pipe 5, the reflux of the concrete can be prevented under the action of the reflux valve 15, and the gas in the bag body 2 can be discharged under the action of the air outlet pipe 16, thereby facilitating the installation of the bag body.
The pressure-bearing bag type expanded anchor cable adopts a bag type expanded anchor cable structure, and an expanded end is formed at the top of the anchor cable, so that the stability of the side slope sash beam is ensured under stress. Compared with the traditional anchor cable, the anchor section and the free section of the anchor cable are completely distinguished, the force transmission system and the bearing mechanism of the anchor cable structure are simple and clear, and the calculation value of the single anchor anchoring force and the determination of the working load are more accurate.
Meanwhile, the length of the anchoring section and the length of the rod body of the anchor rod 1 are greatly shortened (the length of the anchoring section can be generally shortened to 1/4 of the traditional anchor rod 1), the loss of construction materials and equipment is reduced, and the economic efficiency is higher; compared with the existing soil layer expansion anchor rods 1, the anchoring section anchor bar is completely centered, the force transmission and stress mechanism is more advantageous, and the integral stability and strength of the anchor bar are further improved due to the action of the framework 8.
Referring to fig. 3, the construction method of a pressure-bearing bag type expanded anchor cable sash beam of the present invention is characterized by comprising the following steps:
step 1, slope cleaning, fixed-point on-site drilling, cleaning forming holes, stably drilling for 1-2min after drilling to reach the depth in the construction process, preventing the hole bottom from reaching the designed hole diameter, preventing sediment and water from sticking on the hole wall, ensuring that the hole depth of the drilled hole is larger than 50cm and the hole diameter is not smaller than 13cm, cleaning the hole by high-pressure air after the drilling is finished, and ensuring that the hole position deviation is not larger than +/-5 cm. The inclination rate of the drilling axis is not more than 2% of the length of the anchor cable; under the condition that unstable soil body is drilled or surrounding structures are disturbed by the drilled holes, casing protection wall drilling is adopted;
and 4, tensioning the anchor cable by adopting tensioning equipment when the concrete strength of the anchoring body and the pedestal reaches more than 80% of the designed strength, and sealing, backfilling and grouting.
It is worth mentioning that step 2 of the present invention specifically includes,
step 21, arranging a scaffold platform around the forming hole, installing a guide wheel above the axis of the anchor hole, installing a guide cap at the end of the anchor cable, manually and uniformly propelling, and directly feeding the anchor cable into the forming hole to be installed to the designed depth;
and step 22, grouting the anchoring section by adopting 1:1 pure cement slurry, wherein the grouting adopts cement with the strength grade of 32.5, in the grouting process, firstly feeding compressed air into the hole, opening the grouting hole, then continuously performing grouting from bottom to top, and slowly pulling up the grouting pipe along with the injection of the slurry to ensure that the mortar of the anchoring section of the anchor rope is full, and the grouting length of the anchoring section meets the design requirement.
In the construction process of the step 3, the steel bar joints are staggered, the number of the steel bar joints with the same section does not exceed 1/2 of the total number of the steel bars, and the distance between the sections with the welded joints is not less than 1 m.
Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a pressure-bearing bag formula expands body anchor rope, a serial communication port, including stock, utricule, positioning anchor head, tool to lock, steel pipe and slip casting pipe, the tool to lock is two and installs respectively the both ends of steel pipe, the slip casting pipe with the stock suit is in the steel pipe, just be equipped with the injected hole on the steel pipe, the utricule both ends by tool to lock locking is sealed, positioning anchor head is installed the end of steel pipe, establish the skeleton in the utricule, the skeleton includes a plurality of even lays at vertical skeleton and radial skeleton, radial skeleton along vertical skeleton length direction is even at intervals lays, vertical skeleton includes connecting rod and connecting rod, connecting rod and connecting rod end all are provided with the hasp, connecting rod one end with tool to lock fixed connection, the hasp of the connecting rod other end alternates to on the connecting rod.
2. The pressure-bearing bag type expansion anchor cable as claimed in claim 1, wherein the radial skeleton is annular, and an elastic compression body is arranged in the middle of the radial skeleton.
3. The pressure-bearing bag type expansion anchor cable as claimed in claim 2, wherein a reverse flow valve is provided on the grouting pipe, and an air outlet pipe is further provided in the steel pipe.
4. A construction method of a pressure-bearing bag type expanded anchor cable sash beam is characterized by comprising the following steps:
step 1, cleaning a slope surface, drilling holes at fixed points on site, and cleaning forming holes;
step 2, installing a pressure-bearing bag type expanded anchor cable in the forming hole in the step 1, and fixing the anchor cable on a node by using a steel strand;
step 3, casting the lattice beam on site, and maintaining the lattice beam;
and 4, tensioning the anchor cable by adopting tensioning equipment when the concrete strength of the anchoring body and the pedestal reaches more than 80% of the designed strength, and sealing, backfilling and grouting.
5. The construction method of the pressure-bearing bag type expanded anchor cable sash beam as claimed in claim 4, wherein the step 2 specifically comprises
Step 21, arranging a scaffold platform around the forming hole, installing a guide wheel above the axis of the anchor hole, installing a guide cap at the end of the anchor cable, manually and uniformly propelling, and directly feeding the anchor cable into the forming hole to be installed to the designed depth;
and step 22, grouting the anchoring section by adopting 1:1 pure cement slurry, wherein the grouting adopts cement with the strength grade of 32.5, in the grouting process, firstly feeding compressed air into the hole, opening the grouting hole, then continuously performing grouting from bottom to top, and slowly pulling up the grouting pipe along with the injection of the slurry to ensure that the mortar of the anchoring section of the anchor rope is full, and the grouting length of the anchoring section meets the design requirement.
6. The method for constructing a pressure-bearing balloon type expanded anchor cable sash beam as claimed in claim 4, wherein in the construction process of step 3, the joints of the reinforcing steel bars are staggered from each other, the number of joints of the reinforcing steel bars on the same section does not exceed 1/2 of the total number of the reinforcing steel bars, and the distance between the sections with welded joints is not less than 1 m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111544347.9A CN114263172A (en) | 2021-12-16 | 2021-12-16 | Pressure-bearing bag type expanded anchor cable and sash beam construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111544347.9A CN114263172A (en) | 2021-12-16 | 2021-12-16 | Pressure-bearing bag type expanded anchor cable and sash beam construction method |
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| CN114263172A true CN114263172A (en) | 2022-04-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004270228A (en) * | 2003-03-06 | 2004-09-30 | Taisei Corp | Construction method of ground anchor |
| 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 |
| CN105019453A (en) * | 2015-07-31 | 2015-11-04 | 新乡市嘉汇科技有限公司 | Anchor cable with framework expanding body |
| CN205653785U (en) * | 2016-05-20 | 2016-10-19 | 朱鹏程 | Umbellate form skeleton expands body anchor rope |
| CN109356151A (en) * | 2018-11-21 | 2019-02-19 | 江苏景源万河环境科技有限公司 | A kind of variable diameter steel reinforcement cage |
| CN110952542A (en) * | 2019-12-29 | 2020-04-03 | 北京中岩大地科技股份有限公司 | Capsule type anchor rod with function of expanding support framework and using method thereof |
| CN113550335A (en) * | 2021-07-09 | 2021-10-26 | 中电建十一局工程有限公司 | Construction method for high slope concrete slope protection engineering |
-
2021
- 2021-12-16 CN CN202111544347.9A patent/CN114263172A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004270228A (en) * | 2003-03-06 | 2004-09-30 | Taisei Corp | Construction method of ground anchor |
| 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 |
| CN105019453A (en) * | 2015-07-31 | 2015-11-04 | 新乡市嘉汇科技有限公司 | Anchor cable with framework expanding body |
| CN205653785U (en) * | 2016-05-20 | 2016-10-19 | 朱鹏程 | Umbellate form skeleton expands body anchor rope |
| CN109356151A (en) * | 2018-11-21 | 2019-02-19 | 江苏景源万河环境科技有限公司 | A kind of variable diameter steel reinforcement cage |
| CN110952542A (en) * | 2019-12-29 | 2020-04-03 | 北京中岩大地科技股份有限公司 | Capsule type anchor rod with function of expanding support framework and using method thereof |
| CN113550335A (en) * | 2021-07-09 | 2021-10-26 | 中电建十一局工程有限公司 | Construction method for high slope concrete slope protection engineering |
Non-Patent Citations (1)
| Title |
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| 成都建筑工程集团总公司, 电子科技大学出版社 * |
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