CN110565635A - Prefabricated reinforced concrete assembled lattice beam construction method - Google Patents
Prefabricated reinforced concrete assembled lattice beam construction method Download PDFInfo
- Publication number
- CN110565635A CN110565635A CN201910849644.0A CN201910849644A CN110565635A CN 110565635 A CN110565635 A CN 110565635A CN 201910849644 A CN201910849644 A CN 201910849644A CN 110565635 A CN110565635 A CN 110565635A
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- Prior art keywords
- concrete
- reinforcing steel
- lattice beam
- anchor rod
- construction method
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- 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
- E02D17/20—Securing of slopes or inclines
- E02D17/205—Securing of slopes or inclines with modular blocks, e.g. pre-fabricated
-
- 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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
the invention discloses a construction method of a prefabricated reinforced concrete assembled lattice beam, comprising the following steps of S1, carrying out measurement and setting-out on site; s2, manufacturing a lattice beam; s3, embedding reinforcing steel bar tenons at concrete joints of the sash beams, wherein the embedding length and the exposed length are both more than or equal to 30 times of the diameter of the reinforcing steel bars, the distance between every two adjacent reinforcing steel bar tenons is less than 20 times of the diameter of the reinforcing steel bars, and concrete with the strength grade higher than that of the component concrete is injected into the connecting holes of the embedded reinforcing steel bars of the adjacent sash beams; and S4, connecting one end of the prestressed anchor rod with a supporting structure, anchoring the other end in the rock-soil layer body layer, and applying prestress, wherein the prestressed anchor rod is constructed by adopting a post-tensioning method. The prefabricated reinforced concrete assembled lattice beam construction method member provided by the invention has the advantages that the prefabrication completion quality in a factory can be effectively controlled and ensured, the site formwork erecting and concrete pouring are reduced, the maintenance time is shortened, the progress is accelerated, the material utilization rate is greatly improved, the formwork cost is reduced, and the labor force is reduced, so that the purpose of increasing the value of an engineering project is achieved.
Description
Technical Field
The invention relates to the field of tall slopes under complex geological conditions, in particular to a construction method of prefabricated reinforced concrete assembled lattice beams.
background
With the continuous improvement of sustainable development and energy-saving and environment-friendly requirements and the continuous increase of labor cost, the prefabricated concrete structure has great everything and has lower production cost, the labor cost is greatly reduced, and the construction period is shortened; greatly reduces the environmental pollution and energy waste caused by production, obviously improves the utilization rate of various materials and the like. The product quality can be detected by adopting a parking lot, the product quality can be visually ensured, the steps of on-site reinforcement, formwork erection and building concrete can be greatly reduced by using the prefabricated reinforced concrete assembled lattice beam for construction on site, and the construction period is greatly shortened.
Disclosure of Invention
the conventional construction of the anchor rod lattice beam still adopts the construction of side slope grooving site erection formwork pumping concrete. The conventional construction has the defects of long construction period, difficulty in ensuring the quality of cast-in-place sash beam concrete, high cost and the like, and the product is prefabricated in a factory, installed on site, high in production and construction efficiency and guaranteed in quality. The invention provides the following technical scheme:
the construction method of the prefabricated reinforced concrete assembled lattice beam is characterized in that:
s1, measuring and paying off the site;
s2, manufacturing a lattice beam;
S3, embedding reinforcing steel bar tenons at concrete joints of the sash beams, wherein the embedding length and the exposed length are both more than or equal to 30 times of the diameter of the reinforcing steel bars, the distance between every two adjacent reinforcing steel bar tenons is less than 20 times of the diameter of the reinforcing steel bars, and concrete with the strength grade higher than that of the component concrete is injected into the connecting holes of the embedded reinforcing steel bars of the adjacent sash beams;
s4, connecting one end of a pre-stressed anchor rod with a supporting structure, anchoring the other end in a rock-soil layer body layer, and applying pre-stress, wherein the pre-stressed anchor rod is constructed by adopting a post-tensioning method;
s5, installing the lattice beam and performing gap filling construction on the joint;
S6, sequentially mounting a base plate and a working nut at the prestressed anchor rod, mounting a tool anchor and screwing the tool anchor nut;
s7, grouting in the sleeve of the prestressed anchor rod, and stretching when the concrete grouted in the sleeve reaches the designed strength;
And S8, immediately performing anchor sealing work when the tension of the prestressed anchor rod reaches the design tension.
further, the step of manufacturing the lattice beam is as follows:
1) paying off, measuring and manufacturing a steel frame;
2) hoisting the precast blocks into the steel frame in sequence;
3) connecting the adjacent prefabricated blocks by using a mechanical steel bar connector;
4) erecting a template on the precast block close to the outermost side of the steel frame and pouring by using concrete with a higher grade mark;
5) and constructing splicing seams among the prefabricated blocks.
furthermore, the strength grade of the anchor sealing concrete is not lower than 80% of that of the structural concrete and is more than or equal to 30 MPa.
Compared with the prior art, the invention has the beneficial effects that:
(1) One end of the prestressed anchor rod is connected with the supporting structure, the other end of the prestressed anchor rod is anchored in the rock-soil layer body layer, prestress is applied to the prestressed anchor rod, and the friction force of the anchoring end forms anti-pulling force to bear structural pulling force generated by rock-soil pressure, water pressure anti-overturning and the like so as to maintain the stability of the rock-soil body.
(2) the prefabricated reinforced concrete assembled lattice beam construction method member provided by the invention has the advantages that the prefabrication completion quality in a factory can be effectively controlled and ensured, the site formwork erecting and concrete pouring are reduced, the maintenance time is shortened, the progress is accelerated, the material utilization rate is greatly improved, the formwork cost is reduced, and the labor force is reduced, so that the purpose of increasing the value of an engineering project is achieved.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
example 1:
The prefabricated reinforced concrete assembled lattice beam construction method includes the following construction steps:
s1, measuring and paying off the site;
S2, the step of manufacturing the sash beam is as follows:
1) paying off, measuring and manufacturing a steel frame;
2) hoisting the precast blocks into the steel frame in sequence;
3) connecting the adjacent prefabricated blocks by using a mechanical steel bar connector;
4) Erecting a template on the precast block close to the outermost side of the steel frame and pouring by using concrete with a higher grade mark;
5) Constructing splicing seams among the precast blocks;
s3, embedding reinforcing steel bar tenons at concrete joints of the sash beams, wherein the embedding length and the exposed length are both 30 times of the diameter of the reinforcing steel bars, the distance between every two adjacent reinforcing steel bar tenons is 18 times of the diameter of the reinforcing steel bars, and concrete with the strength grade higher than that of the member concrete is injected into the connecting holes of the embedded reinforcing steel bars of the adjacent sash beams;
S4, in the preset anchor rod position of the measurement paying-off, an air compressor is used for drilling and blowing out soil at the same time until a cavity is blown out completely, one end of a prestressed anchor rod is connected with a supporting structure, the other end of the prestressed anchor rod is anchored in a rock-soil layer body layer, prestress is applied, and the prestressed anchor rod is constructed by adopting a post-tensioning method;
s5, installing the lattice beam and performing gap filling construction on the joint;
s6, sequentially mounting a base plate and a working nut at the prestressed anchor rod, mounting a tool anchor and screwing the tool anchor nut;
S7, grouting in the sleeve of the prestressed anchor rod, and stretching when the concrete grouted in the sleeve reaches the designed strength;
and S8, immediately performing anchor sealing work when the tension of the prestressed anchor rod reaches the design tension.
wherein: the strength grade of the anchor sealing concrete is not lower than 80% of that of the structural concrete and is more than or equal to 30 MPa.
example 2
the difference from the embodiment 1 is that: in the step S3: the steel bar tenons are embedded in the joints of the sash beam concrete, the embedded length and the exposed length are 35 times of the diameter of the steel bar, and the distance between every two adjacent steel bar tenons is 15 times of the diameter of the steel bar.
example 3
the difference from the embodiment 1 is that: in the step S3: the steel bar tenons are embedded in the joints of the sash beam concrete, the embedded length and the exposed length are 40 times of the diameter of the steel bar, and the distance between every two adjacent steel bar tenons is 10 times of the diameter of the steel bar.
example 4
The steps of manufacturing the lattice beam are as follows:
1) Paying off, measuring and manufacturing a steel frame;
2) Hoisting the precast blocks into the steel frame in sequence;
3) Connecting the adjacent prefabricated blocks by using a mechanical steel bar connector;
4) erecting a template on the precast block close to the outermost side of the steel frame and pouring by using concrete with a higher grade mark;
5) and constructing splicing seams among the prefabricated blocks.
The invention has the beneficial effects that: one end of the prestressed anchor rod is connected with the supporting structure, the other end of the prestressed anchor rod is anchored in the rock-soil layer body layer, prestress is applied to the prestressed anchor rod, and the friction force of the anchoring end forms anti-pulling force to bear structural pulling force generated by rock-soil pressure, water pressure anti-overturning and the like so as to maintain the stability of the rock-soil body. The prefabricated reinforced concrete assembled lattice beam construction method member provided by the invention has the advantages that the prefabrication completion quality in a factory can be effectively controlled and ensured, the site formwork erecting and concrete pouring are reduced, the maintenance time is shortened, the progress is accelerated, the material utilization rate is greatly improved, the formwork cost is reduced, and the labor force is reduced, so that the purpose of increasing the value of an engineering project is achieved.
Claims (3)
1. The construction method of the prefabricated reinforced concrete assembled lattice beam is characterized in that:
s1, measuring and paying off the site;
S2, manufacturing a lattice beam;
s3, embedding reinforcing steel bar tenons at concrete joints of the sash beams, wherein the embedding length and the exposed length are both more than or equal to 30 times of the diameter of the reinforcing steel bars, the distance between every two adjacent reinforcing steel bar tenons is less than 20 times of the diameter of the reinforcing steel bars, and concrete with the strength grade higher than that of the component concrete is injected into the connecting holes of the embedded reinforcing steel bars of the adjacent sash beams;
S4, connecting one end of a pre-stressed anchor rod with a supporting structure, anchoring the other end in a rock-soil layer body layer, and applying pre-stress, wherein the pre-stressed anchor rod is constructed by adopting a post-tensioning method;
s5, installing the lattice beam and performing gap filling construction on the joint;
s6, sequentially mounting a base plate and a working nut at the prestressed anchor rod, mounting a tool anchor and screwing the tool anchor nut;
s7, grouting in the sleeve of the prestressed anchor rod, and stretching when the concrete grouted in the sleeve reaches the designed strength;
and S8, immediately performing anchor sealing work when the tension of the prestressed anchor rod reaches the design tension.
2. The prefabricated reinforced concrete fabricated grid construction method of claim 1, wherein: the steps of manufacturing the lattice beam are as follows:
1) Paying off, measuring and manufacturing a steel frame;
2) hoisting the precast blocks into the steel frame in sequence;
3) Connecting the adjacent prefabricated blocks by using a mechanical steel bar connector;
4) erecting a template on the precast block close to the outermost side of the steel frame and pouring by using concrete with a higher grade mark;
5) and constructing splicing seams among the prefabricated blocks.
3. the prefabricated reinforced concrete fabricated grid construction method of claim 1, wherein: the strength grade of the anchor sealing concrete is not lower than 80% of that of the structural concrete and is more than or equal to 30 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910849644.0A CN110565635A (en) | 2019-09-09 | 2019-09-09 | Prefabricated reinforced concrete assembled lattice beam construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910849644.0A CN110565635A (en) | 2019-09-09 | 2019-09-09 | Prefabricated reinforced concrete assembled lattice beam construction method |
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| CN110565635A true CN110565635A (en) | 2019-12-13 |
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| CN201910849644.0A Pending CN110565635A (en) | 2019-09-09 | 2019-09-09 | Prefabricated reinforced concrete assembled lattice beam construction method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06207415A (en) * | 1993-01-08 | 1994-07-26 | Furii Kogyo Kk | Slope stabilizing construction method |
| CN202416631U (en) * | 2012-02-23 | 2012-09-05 | 北京中建建筑科学研究院有限公司 | Reversing-V-shaped temporary enclosure baffle |
| CN109356173A (en) * | 2018-10-22 | 2019-02-19 | 中铁二院工程集团有限责任公司 | A kind of pin-connected panel anchor bolt frame girder construction and its construction method |
-
2019
- 2019-09-09 CN CN201910849644.0A patent/CN110565635A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06207415A (en) * | 1993-01-08 | 1994-07-26 | Furii Kogyo Kk | Slope stabilizing construction method |
| CN202416631U (en) * | 2012-02-23 | 2012-09-05 | 北京中建建筑科学研究院有限公司 | Reversing-V-shaped temporary enclosure baffle |
| CN109356173A (en) * | 2018-10-22 | 2019-02-19 | 中铁二院工程集团有限责任公司 | A kind of pin-connected panel anchor bolt frame girder construction and its construction method |
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Application publication date: 20191213 |