CN114045855B - Soft soil foundation large-span reinforced concrete beam construction method - Google Patents
Soft soil foundation large-span reinforced concrete beam construction method Download PDFInfo
- Publication number
- CN114045855B CN114045855B CN202111168564.2A CN202111168564A CN114045855B CN 114045855 B CN114045855 B CN 114045855B CN 202111168564 A CN202111168564 A CN 202111168564A CN 114045855 B CN114045855 B CN 114045855B
- Authority
- CN
- China
- Prior art keywords
- concrete
- steel bars
- construction
- binding
- pouring
- 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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/34—Foundations for sinking or earthquake territories
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a construction method of a large-span reinforced concrete beam of a soft soil foundation, which relates to the field of reinforced concrete structures and comprises the following specific steps: 1. constructing a pile foundation; 2. pouring a cushion layer; 3. binding steel bars; 4. checking and accepting the steel bars; 5. constructing a lateral template; 6. pouring structural concrete for the first time; 7. inserting short steel bars; 8. concrete finishing and support dismantling; 9. binding the waist bars and the upper longitudinal steel bars; 10. checking and accepting the construction of the side formwork; 11. finally pouring structural concrete; 12. and (7) maintaining. According to the invention, the girder and the cushion layer are poured in a grading manner, the girder and the cushion layer are partially overlapped, the longitudinal stressed steel bar with the same type and specification as the steel bar at the lower part of the girder is arranged in the cushion layer, the width of a tension area at the lower part of the girder is increased, the deformation resistance of the structure in the construction process and after the construction is finished is improved, and meanwhile, the transverse steel bar and the longitudinal steel bar are arranged, so that the deformation coordination of the whole structure is enhanced, and the deformation of the structure is further controlled.
Description
Technical Field
The invention relates to the field of reinforced concrete structures, in particular to a construction method of a large-span reinforced concrete beam of a soft soil foundation.
Background
Along with the rapid development of economy, the urbanization process is accelerated, a large number of buildings are built, and the reinforced concrete structure is widely applied.
Because some special cases need design, construction large-span reinforced concrete structure on soft soil foundation, because the span is big, the roof beam cross-section is higher, and the load is comparatively concentrated in the work progress, very easily causes the regional settlement of girder place, and the construction degree of difficulty is very big, and construction quality can't guarantee, generally need carry out soft foundation treatment to the region of girder place, increases more in time limit for a project and cost, and the effect can't hundredth guarantee. Therefore, it is necessary to invent a construction method of a soft soil foundation long-span reinforced concrete beam to solve the above problems.
Disclosure of Invention
The invention aims to provide a construction method of a large-span reinforced concrete beam of a soft soil foundation, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the construction method of the large-span reinforced concrete beam of the soft soil foundation comprises the following specific steps:
1. constructing a pile foundation in a construction area according to a construction plan and a construction drawing, and finishing the construction of the pile foundation after detecting and leveling earthwork of the construction area;
2. pouring a cushion layer, namely pouring the concrete cushion layer, wherein the concrete cushion layer is C15 plain concrete, an early strength agent can be added into the C15 plain concrete according to construction requirements, and the width of two sides of the concrete cushion layer is larger than that of a beam;
3. binding reinforcing steel bars, constructing the reinforcing steel bars and the stirrups at the lower parts of the girders after the concrete cushion layers have enough strength, erecting the stirrups through pile foundations at two sides and reinforcing steel bar supports arranged in the spans, meanwhile, laying longitudinal reinforcing steel bars with the same diameter as the girders in the cushion layers at two sides of the girders, laying transverse reinforcing steel bars below the longitudinal reinforcing steel bars at certain intervals, firmly binding each node of the longitudinal reinforcing steel bars and each node of the transverse reinforcing steel bars through binding wires, and binding adjacent nodes in a splayed shape;
4. checking and accepting the steel bars, checking and accepting binding points of the longitudinal steel bars and the transverse steel bars, and performing secondary binding on the binding points which are unqualified in checking and accepting;
5. constructing lateral formworks at two sides of the longitudinal steel bars, wherein the height of the lateral formworks is slightly higher than the pouring height of concrete, and after the lateral formworks are constructed, checking and accepting are required, and the next step can be carried out after the checking and accepting are qualified;
6. pouring structural concrete for the first time, and performing design-grade concrete pouring according to a construction standard;
7. inserting the short steel bars, vertically inserting the short steel bars into the concrete at a certain interval before initial setting of the concrete after the concrete is poured, wherein half of the short steel bars are exposed, and the short steel bars and the stirrups are distributed in a staggered manner;
8. after the strength of the concrete is enough, performing chiseling treatment on the surface of the concrete and cleaning the surface of the concrete, and simultaneously removing a vertical support for fixing stirrups;
9. binding the waist bars and the upper longitudinal steel bars, constructing and binding the stressed main bars and the waist bars on the upper part of the girder, synchronously constructing and binding the stressed main bars and the waist bars, binding adjacent nodes in a splayed shape, checking and accepting after binding is finished, and performing secondary binding on unqualified binding points;
10. checking and accepting the construction of the side formwork, namely performing the construction of the side formwork on two sides of the waist bar according to the construction standard of the project, and checking and accepting the side formwork after the construction is completed;
11. the method comprises the following steps of (1) finally pouring structural concrete, wherein the concrete is finally poured inside a side formwork, the pouring height of the concrete depends on a construction standard, and the side formwork can be disassembled after the concrete strength is enough;
12. and (4) maintenance, namely, periodically detecting and maintaining the concrete with sufficient strength until the concrete completely meets the construction requirement.
Preferably, in the first step, the concrete cast-in-place pile is used for pile foundation construction, and the specific pile foundation construction method depends on the construction environment and the construction plan.
Preferably, in the second step, the height of the C15 plain concrete cushion layer is 100mm, and the widths of both sides of the C15 plain concrete cushion layer are respectively greater than the beam width by 1000mm.
Preferably, in step three, the stirrup should keep perpendicular setting with girder lower part reinforcing bar, and the crotch coincide department of stirrup should follow girder lower part reinforcing bar direction setting of staggering, and the laying of horizontal reinforcing bar is carried out according to interval 150mm below vertical reinforcing bar, and vertical reinforcing bar and horizontal reinforcing bar should carry out the ligature after laying the completion, and the ligature flow is as follows:
1) Constructing a construction template according to the actual environment of a construction site, and preparing a skid and a rust remover;
2) Derusting the steel bars by a derusting agent, and checking the types and the number of the steel bars;
3) Laying transverse steel bars and longitudinal steel bars in sequence, wherein the space between the transverse steel bars and the longitudinal steel bars meets the construction requirement;
4) And binding each node of the longitudinal steel bar and the transverse steel bar through binding wires, wherein adjacent nodes are bound in a splayed shape.
Preferably, in the sixth step and the eleventh step, the height between the feed opening of the concrete and the concrete cushion layer should not exceed 2 meters, the concrete pouring should be performed in a segmented pouring continuous manner, a vibrator should be used for vibration treatment in the pouring process, the conditions of the reinforcement bars, the stirrups, the longitudinal reinforcement bars, the transverse reinforcement bars, the waist bars and the lateral formworks at the lower parts of the girders should be closely noticed in the pouring process, and once the reinforcement bars, the stirrups, the longitudinal reinforcement bars, the transverse reinforcement bars, the waist bars and the lateral formworks at the lower parts of the girders deviate and are loosened, the pouring should be stopped immediately, and the poured concrete should be repaired before the concrete is solidified.
Preferably, in the seventh step, the short steel bars should be inserted into the concrete to avoid affecting the concrete as much as possible, the concrete should be repaired before the concrete is solidified due to the affected concrete area, after the short steel bars are inserted, a measuring ruler or a marker post should be used for measuring, and the short steel bars which do not meet the specification should be pulled out and reinserted.
Preferably, in the ninth step, the procedure of binding the waist bars and the upper longitudinal steel bars is equal to the third step.
Preferably, in the step twelve, the concrete can be detected by a rebound method, an ultrasonic rebound synthesis method, a pulling-out method or a core drilling method, the concrete detection method depends on the construction standard and the construction environment, the concrete is maintained mainly by a regular watering method, and if the concrete volume reaches the large-volume concrete standard, corresponding construction, temperature control and maintenance measures are required in the pouring and maintenance stages.
The invention has the technical effects and advantages that:
1. according to the invention, the girder and the cushion layer are poured in a grading manner, the girder and the cushion layer are partially overlapped, and the longitudinal stressed steel bar with the same type and specification as the steel bar at the lower part of the girder is arranged in the cushion layer, so that the width of a tension area at the lower part of the girder is increased, the deformation resistance of the structure in the construction process and after the construction is finished is improved, and meanwhile, the transverse steel bar and the longitudinal steel bar are arranged, so that the deformation coordination of the whole structure is enhanced, and the deformation of the structure is further controlled;
2. according to the invention, the reinforcing steel bar cushion layer is arranged, if the reinforcing steel bars in the cushion layer are not considered in the design stage, only construction measures are taken, the crossbeam is changed from the originally designed rectangular beam into the T-shaped beam, the safety storage of the structure is increased, and if the reinforcing steel bars are considered to be designed into the T-shaped beam in the design stage, compared with the rectangular beam, the width of the reinforcing steel bars arranged at the lower part is increased, so that the centroid of the reinforcing steel bars at the lower part is far away from the centroid of the cross section of the crossbeam, the efficiency of the reinforcing steel bars is more greatly exerted, the using amount of the reinforcing steel bars can be reduced, meanwhile, the interval of the reinforcing steel bars at the lower part is larger, the vibration pouring of concrete is facilitated, and the construction quality is ensured;
3. according to the invention, through multiple times of concrete pouring, after the concrete poured each time reaches a certain strength, the subsequent construction load can be well borne, and particularly, the primary pouring part of the girder has a larger bending resistance bearing capacity, so that the settlement of the girder during the subsequent large-volume concrete pouring can be effectively controlled;
4. according to the invention, the stirrup of the girder is fixed in advance, and the stirrup can be used as a support for binding the longitudinal steel bar and the waist bar at the subsequent upper part, so that a support does not need to be built for the longitudinal steel bar, the construction flow of the longitudinal steel bar and the steel loss are reduced, and the construction efficiency is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic top view of a first pour of the present invention.
FIG. 3 is a schematic side view of the present invention with reinforcement bars tied prior to the second pour.
Fig. 4 is a schematic cross-sectional view of a first casting according to the present invention.
Fig. 5 is a schematic cross-sectional view of a second pour of the present invention.
In the figure: 1. a pile foundation; 2. a girder; 3. a girder extension beam; 4. a first pouring part; 5. hooping; 6. short reinforcing steel bars; 7. the girder is extended from a first pouring part; 8. c15 plain concrete cushion layer; 9. longitudinal reinforcing steel bars; 10. transverse reinforcing steel bars; 11. waist muscle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The invention provides a construction method of a large-span reinforced concrete beam of a soft soil foundation as shown in figures 1-5, which comprises the following specific steps:
1. constructing a pile foundation 1, constructing the pile foundation 1 in a construction area according to a construction plan and a construction drawing, finishing the construction of the pile foundation 1 after detecting and leveling earthwork of the construction area, wherein the concrete cast-in-place pile is adopted for the construction of the pile foundation 1, and the specific construction method of the pile foundation 1 depends on the construction environment and the construction plan;
2. pouring a cushion layer, namely pouring the concrete cushion layer, wherein the concrete cushion layer is C15 plain concrete, an early strength agent can be added into the C15 plain concrete according to the construction requirement, the width of two sides of the C15 plain concrete cushion layer 8 is larger than the width of a beam, the height of the C15 plain concrete cushion layer 8 is 100mm, and the width of two sides of the C15 plain concrete cushion layer 8 is respectively larger than the width of the beam by 1000mm;
3. reinforcement, treat that concrete cushion intensity is enough after, be under construction girder lower part reinforcing bar and stirrup, stirrup 5 erects through the pile foundation of both sides and the steel bar support who strides the setting, lay vertical reinforcement 9 with the girder diameter in the bed course of girder both sides simultaneously, horizontal reinforcing bar 10 is laid according to a determining deviation in vertical reinforcement 9 below, it is firm with every node ligature of vertical reinforcing bar 9 and horizontal reinforcing bar 10 through pricking the silk, adjacent node is the splayed ligature, stirrup 5 should keep perpendicular setting with girder lower part reinforcing bar, the crotch coincide department of stirrup 5, should follow girder lower part reinforcing bar direction setting of staggering, vertical reinforcing bar 9 below carries out laying of horizontal reinforcing bar 10 according to interval 150mm, vertical reinforcing bar 9 and horizontal reinforcing bar 10 should carry out the ligature after laying the completion, the ligature flow is as follows:
1) Constructing a construction template according to the actual environment of a construction site, and preparing a skid and a rust remover;
2) Derusting the steel bars by a derusting agent, and checking the types and the number of the steel bars;
3) Sequentially laying transverse steel bars 10 and longitudinal steel bars 9, wherein the space between the transverse steel bars 10 and the longitudinal steel bars 9 meets the construction requirement;
4) Binding each node of the longitudinal steel bars 9 and each node of the transverse steel bars 10 through binding wires, wherein adjacent nodes are bound in a splayed shape;
4. checking and accepting the steel bars, checking and accepting binding points of the longitudinal steel bars 9 and the transverse steel bars 10, and performing secondary binding on the binding points which are unqualified in checking and accepting;
5. constructing lateral formworks at two sides of the longitudinal steel bars 9, wherein the heights of the lateral formworks are slightly higher than the pouring height of concrete, and after the lateral formworks are constructed, checking and accepting are required, and the next step can be carried out after the checking and accepting are qualified;
6. the method comprises the following steps of firstly pouring structural concrete, carrying out design label concrete pouring according to construction standards, wherein the height between a feed opening of the concrete and a concrete cushion layer is not more than 2 m, the concrete pouring is carried out in a segmented pouring continuous mode, a vibrator is adopted for vibration treatment in the pouring process, the conditions of a girder lower reinforcing steel bar, a stirrup 5, a longitudinal reinforcing steel bar 9, a transverse reinforcing steel bar 10 and a lateral template are closely noticed in the pouring process, once the girder lower reinforcing steel bar, the stirrup 5, the longitudinal reinforcing steel bar 9, the transverse reinforcing steel bar 10 and the lateral template are deviated and loosened, the pouring is stopped immediately, and the poured concrete is repaired before being solidified;
7. inserting the short steel bars 6, after concrete pouring is finished, vertically inserting the short steel bars 6 into the concrete according to a certain interval before the concrete is initially set, wherein half of the short steel bars 6 are exposed, the short steel bars 6 and the stirrups 5 are distributed in a staggered manner, the short steel bars 6 are prevented from influencing the concrete as much as possible in the inserting process, the concrete area influenced by construction reasons is repaired before the concrete is set, after the short steel bars 6 are inserted, measuring is carried out by adopting a measuring ruler or a mark post, and the short steel bars 6 which do not accord with the standard are pulled out and reinserted;
8. after the strength of the concrete is enough, performing chiseling treatment on the surface of the concrete and cleaning the surface of the concrete, and simultaneously removing the erection support for fixing the stirrups 5;
9. binding the waist bars and the upper longitudinal steel bars, constructing and binding the stress main bars and the waist bars 11 on the upper part of the girder, synchronously constructing and binding the stress main bars and the waist bars 11, binding adjacent nodes in a splayed shape, checking and accepting after binding is finished, performing secondary binding on binding points which are unqualified to check and accept, and binding the waist bars 11 in a flow path which is equal to the third step;
10. checking and accepting the construction of the side templates, namely performing the construction of the side templates on two sides of the waist rib 11 according to the construction standard of the project, and checking and accepting the side templates after the construction is completed;
11. the method comprises the following steps of (1) finally pouring structural concrete, wherein the concrete is finally poured inside a side formwork, the pouring height of the concrete depends on a construction standard, and the formwork can be detached from the side formwork after the strength of the concrete is enough;
12. and (3) maintenance, namely, regularly detecting and maintaining the concrete with sufficient strength until the concrete completely meets the construction requirement, wherein the concrete can be detected by a rebound method, an ultrasonic rebound synthesis method, a pulling-out method or a core drilling method, the concrete detection method depends on the construction standard and the construction environment, and the concrete is maintained mainly by regularly watering (if the concrete volume reaches the mass concrete standard, corresponding construction, temperature control and maintenance measures are required in the pouring and maintenance stages).
According to the invention, the longitudinal steel bars with the same type and specification as the steel bars at the lower part of the girder are arranged in the C15 plain concrete cushion layer 8, so that the width of a tension area at the lower part of the girder 2 is increased, the deformation resistance of the structure is improved, meanwhile, the transverse steel bars 10 and the longitudinal steel bars 9 are arranged, the integral deformation coordination of the structure is enhanced, the deformation of the structure is further controlled, and the girder 2 is changed into a T-shaped girder from a rectangular girder of the original design by arranging the C15 plain concrete cushion layer 8 and only by construction measures if the steel bars at the lower part of the girder in the C15 plain concrete cushion layer are not considered in the design stage, so that the safety reserve is increased;
if the design is considered as a T-shaped beam in the design stage, compared with a rectangular beam, the width of laying steel bars at the lower part is increased, the lower part steel bar centroid is far away from the girder 2 cross-section centroid, the steel bar efficiency is more greatly exerted, the steel bar using amount can be reduced, meanwhile, the lower part steel bar interval is larger, the vibration pouring of concrete is facilitated, the construction quality is ensured, the concrete is poured for many times, the primary pouring concrete is the primary pouring part 4, the primary pouring part 4 has larger bending resistance bearing capacity, the subsequent construction load can be well borne, the girder 2 settlement in the construction process is effectively controlled, the arranged stirrups 5 are fixed in advance through fractional pouring, the stirrups 5 can become supports for the subsequent upper part longitudinal steel bar binding, the construction process of the longitudinal steel bar 9 is reduced, and the construction efficiency is improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. The construction method of the large-span reinforced concrete beam of the soft soil foundation is characterized by comprising the following specific steps of:
1. constructing a pile foundation in a construction area according to a construction plan and a construction drawing, and finishing the construction of the pile foundation after detecting and leveling earthwork of the construction area;
2. pouring a cushion layer, namely pouring a concrete cushion layer, wherein the concrete cushion layer is C15 plain concrete, an early strength agent is added into the C15 plain concrete according to construction requirements, and the width of two sides of the concrete cushion layer is larger than that of a beam;
3. binding steel bars, constructing the steel bars and the stirrups at the lower part of the girder after the strength of the concrete cushion layer is enough, erecting the stirrups through pile foundations at two sides and a steel bar support arranged in a span, meanwhile, paving longitudinal steel bars with the same diameter as the girder in the cushion layers at two sides of the girder, paving transverse steel bars below the longitudinal steel bars at a certain interval, firmly binding each node of the longitudinal steel bars and the transverse steel bars through binding wires, and binding adjacent nodes in a splayed shape;
4. checking and accepting the steel bars, checking and accepting binding points of the longitudinal steel bars and the transverse steel bars, and secondarily binding the unqualified binding points which are checked and accepted;
5. constructing lateral formworks at two sides of the longitudinal steel bars, wherein the height of each lateral formwork is slightly higher than the pouring height of concrete, and after the lateral formworks are constructed, checking and accepting are required, and the next step can be carried out after the checking and accepting are qualified;
6. pouring structural concrete for the first time, and performing design grade concrete pouring according to a construction standard;
7. inserting short reinforcing steel bars, vertically inserting the short reinforcing steel bars into concrete at a certain interval before initial setting of the concrete after the concrete is poured, wherein half of the short reinforcing steel bars are exposed, and the short reinforcing steel bars and the stirrups are distributed in a staggered manner;
8. finishing the concrete and removing the support, after the strength of the concrete is enough, roughening the surface of the concrete and cleaning the concrete, and removing the erection support for fixing the stirrups;
9. binding the waist bars with the upper longitudinal steel bars, constructing and binding the stressed main bars and the waist bars on the upper part of the girder, synchronously constructing and binding the stressed main bars and the waist bars, binding adjacent nodes in a splayed shape, checking and accepting after binding is finished, and performing secondary binding on unqualified binding points;
10. checking and accepting the construction of the side templates, namely performing the construction of the side templates on two sides of the waist bar according to the construction standard of the project, and checking and accepting the side templates after the construction is completed;
11. the method comprises the following steps of (1) finally pouring structural concrete, wherein the concrete is finally poured inside a side formwork, the pouring height of the concrete depends on a construction standard, and the side formwork is disassembled after the concrete strength is enough;
12. and (4) maintenance, namely periodically detecting and maintaining the concrete with sufficient strength until the concrete completely meets the construction requirement.
2. A soft soil foundation long-span reinforced concrete beam construction method as claimed in claim 1, wherein in the first step, the concrete cast-in-place pile is adopted for pile foundation construction, and the concrete pile foundation construction method depends on the construction environment and the construction plan.
3. A soft soil foundation long-span reinforced concrete beam construction method as claimed in claim 2, wherein in the second step, the height of the C15 plain concrete cushion layer is 100mm, and the width of each of both sides of the C15 plain concrete cushion layer is greater than 1000mm of the beam width.
4. A soft soil foundation large-span reinforced concrete beam construction method according to claim 3, wherein in the third step, the stirrups are vertically arranged with the lower part of the girder, the bent hooks of the stirrups are staggered along the direction of the lower part of the girder, the transverse steel bars are laid under the longitudinal steel bars at intervals of 150mm, the longitudinal steel bars and the transverse steel bars are bound after the laying is completed, and the binding process is as follows:
1) Constructing a construction template according to the actual environment of a construction site, and preparing a skid and a rust remover;
2) Derusting the steel bars by a derusting agent, and checking the types and the number of the steel bars;
3) Laying transverse steel bars and longitudinal steel bars in sequence, wherein the space between the longitudinal steel bars and the transverse steel bars is in accordance with the construction requirement;
4) Binding each node of the longitudinal steel bars and each node of the transverse steel bars through binding wires, wherein the adjacent nodes are bound in a splayed shape.
5. A soft soil foundation long-span reinforced concrete beam construction method as claimed in claim 4, wherein in the sixth and eleventh steps, the height between the feed opening of the concrete and the concrete cushion layer should not exceed 2 meters, the concrete pouring should be performed in a segmented pouring continuous manner, the vibrator should be used for vibrating during the pouring process, the condition of the lower steel bars, stirrups, longitudinal steel bars, transverse steel bars, waist bars and lateral formworks of the girders should be closely noticed during the pouring process, once the lower steel bars, stirrups, longitudinal steel bars, transverse steel bars, waist bars and lateral formworks of the girders deviate and become loose, the pouring should be stopped immediately, and the poured concrete should be repaired before being solidified.
6. The method for constructing the large-span reinforced concrete beam of the soft soil foundation according to claim 5, wherein in the seventh step, the short steel bars are inserted in the process of avoiding affecting the concrete as much as possible, the concrete area affected by the construction reason is repaired before the concrete is solidified, after the short steel bars are inserted, a measuring scale or a marking post is adopted for measuring, and the short steel bars which do not meet the specification are pulled out and reinserted.
7. A soft soil foundation large-span reinforced concrete beam construction method as claimed in claim 6, wherein in the ninth step, the procedure of waist bar binding is equal to the third step.
8. A soft soil foundation long-span reinforced concrete beam construction method as claimed in claim 7, wherein in the twelfth step, concrete detection is performed by a springback method, an ultrasonic springback synthesis method, a pulling-out method or a core drilling method, the concrete detection method depends on construction standards and construction environments, and concrete maintenance is mainly performed by regular watering, if the concrete volume reaches the large-volume concrete standard, and corresponding construction, temperature control and maintenance measures are required in the pouring and maintenance stages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111168564.2A CN114045855B (en) | 2021-09-30 | 2021-09-30 | Soft soil foundation large-span reinforced concrete beam construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111168564.2A CN114045855B (en) | 2021-09-30 | 2021-09-30 | Soft soil foundation large-span reinforced concrete beam construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114045855A CN114045855A (en) | 2022-02-15 |
| CN114045855B true CN114045855B (en) | 2023-02-21 |
Family
ID=80204917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111168564.2A Active CN114045855B (en) | 2021-09-30 | 2021-09-30 | Soft soil foundation large-span reinforced concrete beam construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114045855B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1018304A (en) * | 1996-07-03 | 1998-01-20 | Asahi Chem Ind Co Ltd | Mat foundation structure and its construction method |
| CN105649103B (en) * | 2016-03-24 | 2017-12-15 | 广西建工集团第五建筑工程有限责任公司 | Pile-beam structure integrated tower crane foundation structure and construction method thereof |
| CN108374425B (en) * | 2018-02-09 | 2023-12-22 | 中交二航局第四工程有限公司 | Bearing platform and foundation pit cushion layer construction structure and pouring method thereof |
-
2021
- 2021-09-30 CN CN202111168564.2A patent/CN114045855B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114045855A (en) | 2022-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101748681B (en) | Pretensioning method construction technology of 50m broken line reinforced concrete T-shaped beam | |
| CN106677049B (en) | Assembled steel-concrete combined structure bridge and construction method | |
| CN105714684B (en) | Prestress concrete variable cross-section fish-belly continuous box beam construction method | |
| CN104895092B (en) | The method that a kind of interim lattice column of inner support is used as permanent structure post | |
| CN106437142A (en) | Construction method and double-layer formwork structure for cast-in-situ slope roof | |
| CN107574762A (en) | A kind of construction method for strengthening Cast-in-situ Beam 0# block construction qualities | |
| CN111155385B (en) | Treatment structure and construction method for newly added retaining wall of active large-deformation roadbed | |
| CN112554059B (en) | Viaduct ground-crossing parallel bridge pier full combined support and construction method thereof | |
| CN112554077A (en) | Steel pipe concrete assembled truss composite beam construction system and construction method | |
| CN110965474A (en) | Construction method of cable tower cross beam | |
| CN103410102A (en) | H-shaped double column pier wide-bridge-surface cantilever temporary consolidation structure and construction method thereof | |
| CN110258289A (en) | Prestressed concrete continuous box girder bridge laterally spells wide structure | |
| CN107100083A (en) | A kind of T-shaped high pier Cast-in-place Bent Cap formwork erecting structure and construction method | |
| CN103938871B (en) | A kind of construction method adopting the steel core concrete column bonded prestress frame beam structure of reinforced concrete ring beam joint | |
| CN113638304B (en) | Concrete beam type bridge hidden cover beam structure system and construction method thereof | |
| CN108316150B (en) | Construction system and construction method for main tower and steel anchor beam of cable-stayed bridge | |
| CN102518034A (en) | Bidirectional pre-bent multi-steel-girder and concrete bridge deck combined small box girder bridge structure | |
| CN107083840A (en) | A kind of anti-bank one-shot forming formwork erection method in toilet | |
| CN114045855B (en) | Soft soil foundation large-span reinforced concrete beam construction method | |
| CN113818352B (en) | Soft foundation high pier curve cast-in-situ box girder bridge and construction method thereof | |
| CN215925694U (en) | Formwork structure of large-span prestressed bent cap | |
| CN108824211A (en) | A kind of bridge pier foundation in construction duration method in the river of bridge | |
| CN115262811A (en) | Construction method of transverse section steel concrete combined shear wall | |
| CN212388856U (en) | Cast-in-place clear water concrete batter post structure of prestressing force | |
| CN111058386B (en) | Viaduct construction method for overpass existing ground bridge |
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 |