CN115075608B - Reinforced concrete foundation beam enlarged section mechanical connection bar planting method - Google Patents
Reinforced concrete foundation beam enlarged section mechanical connection bar planting method Download PDFInfo
- Publication number
- CN115075608B CN115075608B CN202210896840.5A CN202210896840A CN115075608B CN 115075608 B CN115075608 B CN 115075608B CN 202210896840 A CN202210896840 A CN 202210896840A CN 115075608 B CN115075608 B CN 115075608B
- Authority
- CN
- China
- Prior art keywords
- bar
- bar planting
- type adhesive
- injection type
- hole
- 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.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Piles And Underground Anchors (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
A reinforced concrete foundation beam enlarged section mechanical connection bar planting method comprises the following steps: positioning, drilling, cleaning holes, rust removal of steel bars, adhesive preparation, bar planting, sleeve connection, secondary glue injection, curing and inspection. The method comprises the steps of injecting an injection type adhesive into a bar planting drill hole by using an injector with an injection tube extender, then slowly inserting the bar into the bar planting drill hole in a rotating mode, keeping the injection type adhesive full of the bar planting drill hole, simultaneously implanting the injection tube extender into the bar planting drill hole along with the bar, generating a vacuum cavity in the bar planting drill hole for implanting the bar caused by the installation of a bar sleeve, injecting the injection type adhesive into the vacuum cavity for the second time by using the implanted injection tube extender, slowly injecting the injection type adhesive, synchronously and slowly extracting the injection tube extender, and fully filling the vacuum cavity with the injection type adhesive. The invention solves the problem that when the steel bar sleeve is connected, the steel bar is pulled out from the steel bar embedding hole to cause a cavity, thereby reducing the effective steel bar embedding depth.
Description
Technical Field
The invention belongs to the technical field of construction of building structure reinforcement engineering, and particularly relates to a bar planting method for mechanically connecting reinforced concrete foundation beams in enlarged cross sections in the building structure reinforcement engineering.
Background
In the construction process of the building structure reinforcement engineering, the foundation beam is often required to be subjected to cross section enlarging treatment due to insufficient bearing capacity of the foundation of the original structure. The unavoidable needs are planted the muscle, and the foundation beam atress reinforcing bar diameter is great often, can not adopt overlap joint, welds, can only select mechanical connection at last. Different from the newly-built structure, the reinforcing bar needs to be divided into two sections, implants respectively in the frame post at foundation beam both ends, because of the reinforcing bar needs to screw in the sleeve respectively when connecting, so at least one side drilling depth needs to be greater than the depth that needs to plant the muscle. In the process of screwing in the sleeve, a cavity is formed in the bar planting hole, and bar planting glue is adsorbed inwards under the action of atmospheric pressure, so that the effective bar planting depth is insufficient. This belongs to the quality common problem of two-head bar planting and middle sleeve connection. At present, the phenomenon is not well solved in construction, and various normative atlas does not describe the phenomenon.
Disclosure of Invention
The invention aims to provide a bar planting method for mechanically connecting reinforced concrete foundation beams with enlarged cross sections, which solves the problem that in the process of screwing in a sleeve, a cavity is formed in a bar planting drill hole, bar planting glue is adsorbed inwards under the action of atmospheric pressure, and the effective bar planting depth is insufficient.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method for reinforcing bar planting for mechanically connecting reinforced concrete foundation beams with enlarged cross sections, the method comprising:
1) Positioning: the steel bar detector is matched with the original completion drawing, the positions of the steel bars with the original structures are distinguished, and the positions of the steel bars with the original structures are marked; according to the design requirement, the pre-estimated position of the original steel bar is combined, marking the positions and the types of the bar planting holes;
2) Drilling: the method comprises the steps of adjusting the drilling position of a bar planting hole to avoid an original structural steel bar during drilling, wherein the drilling diameter of the bar planting hole is d+ (4-10 mm), the drilling depth of the bar planting hole is 15d+ and is connected with the length of a sleeve/2, d is the diameter of the bar planting hole which is mechanically connected, and the length of the sleeve is the length of a mechanical sleeve matched with the diameter of the bar planting hole;
3) Hole cleaning: immediately checking the hole depth and the hole diameter after the bar planting drilling is finished, blowing out dust in the bar planting drilling by using an air pump after meeting the requirements, brushing the hole wall by using a hairbrush and cotton cloth with proper thickness, blowing out the bar planting drilling by using the air pump again, repeating for 3-5 times until no dust and fragments exist in the bar planting drilling, and marking the discarded bar planting drilling after filling by using an injection type adhesive for being used;
4) Rust removal of steel bars: removing rust or greasy dirt in the range of the anchoring length of the steel bar to be implanted, and polishing to obtain metallic luster;
5) Preparing an adhesive: preparing an injection type adhesive;
6) Planting ribs: injecting the injection type adhesive into the bar planting drill hole by adopting an injector with an injection tube extender and an automatic stirring injection tube, slowly rotating and inserting the steel bar into the bar planting drill hole, ensuring that the epoxy injection type adhesive in the bar planting drill hole is full, and simultaneously implanting the injection tube extender into the bar planting drill hole along with the steel bar;
7) Sleeve connection and secondary glue injection: installing a steel bar sleeve, wherein the steel bar sleeve is arranged to generate a vacuum cavity in a steel bar implantation drill hole, an injector extender is implanted when the steel bar is implanted, an injection type adhesive is injected into the vacuum cavity for the second time, the injection type adhesive is slowly injected, the injector extender is slowly pulled out synchronously, and the injection type adhesive is stopped when the vacuum cavity is fully filled with the injection type adhesive;
8) Curing and curing: under the condition of keeping the curing temperature of the injection type adhesive, curing the injection type adhesive in the curing time of curing the injection type adhesive, and in the curing process, the implanted reinforcing steel bars are not disturbed;
9) And (3) checking: after the injection type adhesive is cured, the in-situ anchoring bearing capacity test cannot be performed, and the anchoring bearing capacity test of the test piece with the same witness condition needs to be performed under written approval of a design and supervision unit.
Further preferred technical scheme: in the step 2), the percussion drill is used for drilling.
Further preferred technical scheme: in the step 3), the holes in the bar planting holes are kept dry, and the floating dust and loose small stones are removed by adopting a pressure air pump after each brush cleaning.
Further preferred technical scheme: in the step 4), a disc steel wire brush is adopted, and is driven to rotate at a high speed by utilizing power, so that rust removal, oil removal and decontamination are carried out on the non-implanted steel bars, and the cleaning length is 5-8 cm greater than the anchoring length; the cleaned non-implanted steel bars are sorted and stacked and the cleaned parts are protected.
Further preferred technical scheme: in the step 5), the injection type adhesive is an epoxy injection type adhesive.
Further preferred technical scheme: in the step 7), the vacuum cavity is positioned at the bottom of the bar planting drill hole for planting the bar, and the length of the vacuum cavity is 3-5cm.
Further preferred technical scheme: in the step 8), the curing temperature of the injection type adhesive is 5-25 ℃, and the curing time of the injection type adhesive is at least 3 days.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention can solve the problem that when the steel bar sleeve is connected in the reinforcing process of the reinforced concrete foundation beam, the steel bar is pulled out of the steel bar planting hole by 3-5cm to cause a cavity and reduce the effective steel bar planting depth. Compared with the prior art, the method has the accuracy of the bar planting position, and the effective bar planting length is ensured.
Drawings
FIG. 1 is a schematic diagram of a bi-directional bar planting connection for a reinforced concrete foundation Liang Jia in accordance with the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
Reference numerals: 1-steel bar implantation, 2-sleeve, 3-foundation beam, 4-steel bar implantation drilling, 5-vacuum cavity,
6-syringe extender.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 2, a bidirectional bar planting connection structure of a reinforced concrete foundation beam is taken as an example, and the technical scheme of a bar planting method for mechanically connecting a reinforced concrete foundation beam with an enlarged section is described in detail, wherein the method comprises the following steps:
step 1, positioning: the steel bar detector is matched with the original completion drawing, the positions of the steel bars with the original structures are distinguished, and the positions of the steel bars with the original structures are marked; marking positions and models of the embedded steel bar drilling holes according to design requirements by combining the estimated positions of the original steel bars;
step 2, drilling: when drilling, the drilling position of the bar planting hole is adjusted to avoid the original structural steel bar, if the new drilling position collides with the original steel bar, the drilling position is finely adjusted, the drilling diameter of the bar planting hole is d+ (4-10 mm), the drilling depth of the bar planting hole is 15d+ and is connected with the length of the sleeve/2, d is the diameter of the bar planting hole which is mechanically connected, and the sleeve length is the length of a mechanical sleeve which is matched with the diameter of the bar planting hole. In this embodiment, the diameter of the implanted steel bar is 32mm, the length of the mechanical sleeve matched with the diameter of the implanted steel bar is 80mm, the diameter of the implanted steel bar drilling hole is 32+6mm, and the depth of the implanted steel bar drilling hole is 480+40mm. Drilling is performed by using a percussion drill. In this embodiment, the impact drill is a hand-held impact drill.
Step 3, hole cleaning: immediately checking the depth and the aperture of the hole after the reinforcement drilling is finished, blowing out dust in the hole by using an air pump after meeting the requirement, brushing the hole wall by using a hairbrush with proper thickness and cotton cloth, blowing out the hole by using the air pump again, repeating for 3 times until no dust and fragments exist in the reinforcement drilling, temporarily closing the hole opening after the cleaning is finished, and marking; the waste holes in the process are filled with epoxy injection type adhesive. In this embodiment, the hole in the hole drilled by the bar planting remains dry, and the pressure air pump is used to remove the floating dust and loose small stones after each brush cleaning.
Step 4, rust removal of the steel bar: removing rust or greasy dirt in the range of the anchoring length of the steel bar to be implanted, and polishing to obtain metallic luster; the disc steel wire brush is adopted, and is driven to rotate at a high speed by utilizing power, so that rust removal, oil removal and pollution removal are carried out on the non-implanted steel bars, and the cleaning length is 7 cm greater than the anchoring length; the cleaned non-implanted steel bars are sorted and stacked and the cleaned parts are protected.
And 5, preparing an adhesive: preparing an injection type adhesive; in this embodiment, the injection adhesive is an epoxy injection adhesive.
And 6, planting ribs: injecting the epoxy injection type adhesive into the bar planting drill hole by adopting an injector with an injection tube extender and an automatic stirring injection tube, and then slowly rotating and inserting the reinforcing steel bar into the bar planting drill hole, so as to ensure that the epoxy injection type adhesive in the bar planting drill hole is full, and simultaneously injecting the epoxy injection type adhesive in the process of slowly rotating and inserting the reinforcing steel bar into the bar planting drill hole, and simultaneously implanting the injection tube extender into the bar planting drill hole along with the reinforcing steel bar; in this embodiment, the injectable adhesive is an epoxy injectable adhesive.
Step 7, sleeve connection and secondary glue injection: the steel bar sleeve is installed, the steel bar sleeve is installed according to the requirement, the steel bar is implanted into the sleeve, the steel bar is pulled out of the steel bar in the steel bar implanted drill hole, and when the steel bar is pulled out, the periphery is fully covered with epoxy injection type adhesive, so that the vacuum environment is similar to that in the cavity, an exhaust hole is not required to be arranged, and the vacuum cavity is formed in the steel bar implanted drill hole. The vacuum cavity caused by the outward pulling of the steel bar is positioned at the bottom of the steel bar implantation drill hole implanted with the steel bar, and the length is 3-5cm. In this embodiment, the length of the vacuum cavity is 4cm. At the moment, the syringe extender is implanted when the bar is planted, the epoxy injection type adhesive is injected into the vacuum cavity for the second time, the epoxy injection type adhesive is slowly injected and synchronously pulled out of the syringe extender, and the vacuum cavity is fully filled with the injection type adhesive to stop, so that the pressure is sensed to be fully filled when the injection type adhesive is injected, and the injection is stopped. In this embodiment, the injectable adhesive is an epoxy injectable adhesive.
And 8, curing and curing: under the condition of keeping the curing temperature of the injection type adhesive, curing the injection type adhesive in the curing time of curing the injection type adhesive, and in the curing process, the implanted reinforcing steel bars are not disturbed; the curing temperature of the injection type adhesive is 5-25 ℃, the curing time of the injection type adhesive is at least 3 days, in the embodiment, the curing temperature of the epoxy injection type adhesive is 20 ℃, the curing time of the epoxy injection type adhesive is 3 days, the embedded steel bars are not disturbed, and the embedded steel bars are not swayed or collided in the curing process of the epoxy injection type adhesive.
Step 9, checking: after the epoxy injection type adhesive is cured, in-situ anchoring bearing capacity test cannot be performed, and the anchoring bearing capacity test of the test piece under the same condition is confirmed through written approval of a design and supervision unit. The reinforced concrete foundation beam is reinforced by two ends of the reinforced concrete foundation beam, and mechanical connection work is completed within the operable period of the adhesive, so that the anchoring bearing capacity can not be checked in situ. The construction unit should manufacture test pieces under the same conditions at proper positions according to the same operation method, and carry out anchoring bearing capacity test. The on-site witnessing is required to be approved by the design unit and the supervision unit in writing.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. A reinforced concrete foundation beam enlarged section mechanical connection bar planting method is characterized by comprising the following steps:
1) Positioning: the steel bar detector is matched with the original completion diagram, the positions of the steel bars with the original structure are distinguished, the positions of the steel bars with the original structure are marked, and the positions and the types of the steel bar planting holes are marked according to the design requirements and the estimated positions of the original steel bars;
2) Drilling: the method comprises the steps of adjusting the drilling position of a bar planting hole to avoid an original structural steel bar during drilling, wherein the drilling diameter of the bar planting hole is d+ (4-10 mm), the drilling depth of the bar planting hole is 15d+ and is connected with the length of a sleeve/2, d is the diameter of the bar planting hole which is mechanically connected, and the length of the sleeve is the length of a mechanical sleeve matched with the diameter of the bar planting hole;
3) Hole cleaning: immediately checking the hole depth and the hole diameter after the bar planting drilling is finished, blowing out dust in the bar planting drilling by using an air pump after meeting the requirements, brushing the hole wall by using a hairbrush and cotton cloth with proper thickness, blowing out the bar planting drilling by using the air pump again, repeating for 3-5 times until no dust and fragments exist in the bar planting drilling, and marking the discarded bar planting drilling after filling by using an injection type adhesive for being used;
4) Rust removal of steel bars: removing rust or greasy dirt in the range of the anchoring length of the steel bar to be implanted, and polishing to obtain metallic luster;
5) Preparing an adhesive: preparing an injection type adhesive;
6) Planting ribs: injecting the injection type adhesive into the bar planting drill hole by adopting an injector with an injection tube extender and an automatic stirring injection tube, slowly rotating and inserting the steel bar into the bar planting drill hole, ensuring that the epoxy injection type adhesive in the bar planting drill hole is full, and simultaneously implanting the injection tube extender into the bar planting drill hole along with the steel bar;
7) Sleeve connection and secondary glue injection: installing a steel bar sleeve, wherein the steel bar sleeve is arranged to generate a vacuum cavity in a steel bar implantation drill hole, an injector extender is implanted when the steel bar is implanted, an injection type adhesive is injected into the vacuum cavity for the second time, the injection type adhesive is slowly injected, the injector extender is slowly pulled out synchronously, and the injection type adhesive is stopped when the vacuum cavity is fully filled with the injection type adhesive;
8) Curing and curing: under the condition of keeping the curing temperature of the injection type adhesive, curing the injection type adhesive in the curing time of curing the injection type adhesive, and in the curing process, the implanted reinforcing steel bars are not disturbed;
9) And (3) checking: after the injection type adhesive is cured, the in-situ anchoring bearing capacity test cannot be performed, and test pieces with the same conditions are manufactured at proper positions according to the same operation method to perform the anchoring bearing capacity test.
2. The reinforced concrete foundation beam enlarged section mechanical connection bar planting method of claim 1, wherein: in the step 2), the percussion drill is used for drilling.
3. The reinforced concrete foundation beam enlarged section mechanical connection bar planting method of claim 1, wherein: in the step 3), the holes in the bar planting holes are kept dry, and the floating dust and loose small stones are removed by adopting a pressure air pump after each brush cleaning.
4. The reinforced concrete foundation beam enlarged section mechanical connection bar planting method of claim 1, wherein: in the step 4), a disc steel wire brush is adopted, and is driven to rotate at a high speed by utilizing power, so that rust removal, oil removal and decontamination are carried out on the non-implanted steel bars, and the cleaning length is 5-8 cm greater than the anchoring length; the cleaned non-implanted steel bars are sorted and stacked and the cleaned parts are protected.
5. The reinforced concrete foundation beam enlarged section mechanical connection bar planting method of claim 1, wherein: in the step 5), the injection type adhesive is an epoxy injection type adhesive.
6. The reinforced concrete foundation beam enlarged section mechanical connection bar planting method of claim 1, wherein: in the step 7), the vacuum cavity is positioned at the bottom of the bar planting drill hole for planting the bar, and the length of the vacuum cavity is 3-5cm.
7. The reinforced concrete foundation beam enlarged section mechanical connection bar planting method of claim 1, wherein: in the step 8), the curing temperature of the injection type adhesive is 5-25 ℃, and the curing time of the injection type adhesive is at least 3 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896840.5A CN115075608B (en) | 2022-07-28 | 2022-07-28 | Reinforced concrete foundation beam enlarged section mechanical connection bar planting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896840.5A CN115075608B (en) | 2022-07-28 | 2022-07-28 | Reinforced concrete foundation beam enlarged section mechanical connection bar planting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115075608A CN115075608A (en) | 2022-09-20 |
| CN115075608B true CN115075608B (en) | 2023-07-18 |
Family
ID=83242093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210896840.5A Active CN115075608B (en) | 2022-07-28 | 2022-07-28 | Reinforced concrete foundation beam enlarged section mechanical connection bar planting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115075608B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522484B (en) * | 2022-09-30 | 2023-08-15 | 杭州鑫固建筑特种技术有限公司 | Secondary reinforcement bar planting improvement method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT315108B (en) * | 1972-06-26 | 1974-05-10 | Gd Anker Gmbh & Co Kg | Method or anchor removal for anchoring an anchor bolt in a borehole |
| CN101544482A (en) * | 2009-01-13 | 2009-09-30 | 鄢飞 | PTB inorganic environment-friendly inserted bar adhesive and method for using same |
| CN102486049A (en) * | 2010-12-06 | 2012-06-06 | 上海伙隆实业有限公司 | Filler wall masonry tie bar planting method |
| CN107060365B (en) * | 2017-05-12 | 2019-06-21 | 中冶建工集团有限公司 | The construction method of frame column opposite sides bar planting simultaneously |
| CN109098468B (en) * | 2018-09-11 | 2021-04-27 | 上海市建筑科学研究院 | Drilling injection filling method aiming at sleeve grouting defect |
| CN110041869A (en) * | 2019-04-22 | 2019-07-23 | 苏州市姑苏新型建材有限公司 | A kind of modified epoxy injecting type anchoring adhesive and preparation method thereof |
| CN212836849U (en) * | 2020-06-23 | 2021-03-30 | 北京住总第一开发建设有限公司 | Planting rib anchoring structure |
-
2022
- 2022-07-28 CN CN202210896840.5A patent/CN115075608B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115075608A (en) | 2022-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115075608B (en) | Reinforced concrete foundation beam enlarged section mechanical connection bar planting method | |
| CN103437351B (en) | Treatment method of deviation and fracture remediation of pile body of filling pile | |
| CN101736760A (en) | Prestressed anti-floating anchor rod and construction method thereof | |
| CN111058443B (en) | Precast pile composite foundation construction method for eliminating loess collapsibility | |
| CN111042007A (en) | Planting rib anchoring method | |
| CN112709237A (en) | Construction method of anchor rod sash beam for high-speed slope protection | |
| CN110469141B (en) | Reinforcing method for enlarged section of structural column | |
| CN214832782U (en) | Low-disturbance red layer soft rock cutting slope reinforcement and protection device | |
| CN107288364A (en) | A kind of gunite concrete strengthens the construction method of processing with brick wall binder course | |
| CN103161163A (en) | Prestressed tubular pile for spinning rock drilling and embedding rock socketing | |
| CN104533468A (en) | Drill hole backfill grouting method for subway tunnel | |
| CN112281933A (en) | Construction method of high-pressure jet grouting pile test | |
| CN109469055B (en) | Local pipe seam type end expansion energy-absorbing anchor rod and construction method thereof | |
| CN113833008B (en) | Method and structure for transforming existing foundation ring type fan foundation | |
| CN202899281U (en) | Connection structure for connecting newly constructed drainage pipeline into constructed well body | |
| CN114808921A (en) | Recyclable spiral-advancing type anchor rod-microorganism grouting reinforcement device and method | |
| CN113818454A (en) | Slope reinforcing device and method for inducing directional growth of plant root system | |
| CN110482935B (en) | Preparation of recyclable cement-based repair material and method for dismantling original concrete structure without damage | |
| CN107044211A (en) | A kind of repairing and reinforcing process of sandwich insulation exterior wall glass sheet fiber tension member damage | |
| CN117090417A (en) | Repairing method for interlayer hollows of historic building wall structure | |
| CN220100774U (en) | Reinforced concrete structure reinforcing structure | |
| CN104988981A (en) | Construction method of riding well on existing shield drainage pipeline | |
| KR100405941B1 (en) | Repairing method of tunnel | |
| CN109577898B (en) | Salt well repairing method | |
| KR200409269Y1 (en) | Earth Reinforcement System by Using Bamboo Reinforcement |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |