CN113216251A - Construction method for preventing damage of steel bar lap joint structure - Google Patents
Construction method for preventing damage of steel bar lap joint structure Download PDFInfo
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- CN113216251A CN113216251A CN202110449136.0A CN202110449136A CN113216251A CN 113216251 A CN113216251 A CN 113216251A CN 202110449136 A CN202110449136 A CN 202110449136A CN 113216251 A CN113216251 A CN 113216251A
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- core
- hole
- construction method
- steel bar
- connecting sleeve
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- 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
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Hydrology & Water Resources (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a construction method for preventing a steel bar lapping structure from being damaged, which relates to the technical field of tunnel construction and comprises the following steps: s1: mounting main body steel bars and connecting sleeves on the foundation cushion layer at lap joints; s2: fixing the core mould and connecting the core mould with the connecting sleeve; s3: installing a viewing port assembly at the position of the connecting sleeve; s4: constructing a mold cavity and pouring concrete into the mold cavity; s5: forming a single section after the concrete is solidified, and forming a core hole after the core mould is removed; s6: arranging a grouting hole which is communicated with the core hole; s7: and the rubber plug is used for plugging the grouting hole and the core hole to complete the protection of the protection structure. Aiming at the defects of the prior art, the invention realizes the construction method of embedding the lap joint structure in a single block, and prevents the damage of the steel bar lap joint structure caused by mechanical impact and corrosion in a humid environment.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a construction method for preventing a steel bar lapping structure from being damaged.
Background
With the acceleration of the urbanization process, the infrastructure construction is more and more, and the scale is larger and larger. The urban rail transit provides a superior solution for congested urban traffic, and underground excavation construction is a subject which must be faced by rail transit engineering. Construction of long and large lines is usually segmental construction, with structural reinforcement being reserved at the segmental positions for structural connection. However, since the lap joint structure of the structural steel bars is exposed to a humid environment for a long time and mechanical impact during construction, the lap joint structure is easily damaged by corrosion and mechanical impact.
Disclosure of Invention
The invention aims to provide a construction method for preventing a steel bar lapping structure from being damaged, which aims at the defects of the prior art, realizes a construction method for burying the lapping structure in a single block and prevents the steel bar lapping structure from being damaged due to mechanical impact and corrosion of a humid environment.
The embodiment of the invention is realized by the following technical scheme: a construction method for preventing a steel bar lap joint structure from being damaged comprises the following steps:
s1: installing main body steel bars and connecting sleeves on the foundation cushion layer, wherein the connecting sleeves are installed at the lap joint positions;
s2: fixing the core mould and connecting the core mould with the connecting sleeve;
s3: installing a viewing port assembly at the position of the connecting sleeve;
s4: constructing a mold cavity and pouring concrete into the mold cavity;
s5: forming a single section after the concrete is solidified, and forming a core hole after the core mould is removed;
s6: arranging a grouting hole which is communicated with the core hole;
s7: and plugging the grouting hole and the core hole by using a rubber plug to complete the protection of the lap joint structure.
Further, the S1 includes the following steps:
s10: determining a plurality of lapping positions on the foundation cushion layer, and processing main reinforcing steel bars with corresponding sizes according to the lapping positions;
s11: binding the main body steel bars on the foundation cushion layer;
s12: the connecting sleeve is in coaxial threaded connection with the main body steel bar.
Further, the S2 includes the following steps:
s20: forming a core mold preformed hole on one end template of the foundation cushion layer, wherein the core mold preformed hole is required to be collinear with the axis of the main reinforcing steel bar;
s21: coating demolding oil on the core mold and wrapping with plastic film;
s22: and (4) passing the core mold through the core mold preformed hole to be connected with the connecting sleeve and fixing the core mold.
Furthermore, the mode of forming the mold cavity in the step S4 is to form the end templates on the other end surfaces of the foundation mat layer, and the end templates and the foundation mat layer enclose the mold cavity.
Further, the injection hole in the step S6 is close to the connection sleeve.
Further, before the step of S7, the inner wall of the core hole may be roughened, and the inside of the core hole may be cleaned.
Further, the plurality of overlapping locations are not collinear.
Further, when a plurality of single sections need to be spliced in an overlapping mode,
s8: placing the lap steel bar in the core hole and connecting the lap steel bar with the connecting sleeve;
s9: grouting through the grouting holes until the grout overflows from the core holes, and stopping grouting to finish splicing.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
1. the invention has high working reliability, high construction speed, good use effect and convenient popularization and use;
2. the invention can eliminate the corrosion and damage of the steel bar lapping structure caused by mechanical impact and corrosion in a humid environment on the premise of ensuring the construction speed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic diagram of a construction structure before step S5;
FIG. 3 is a schematic diagram of the construction structure of steps S5-S7 provided by the present invention;
FIG. 4 is a schematic diagram of the construction structure of steps S8-S9 provided by the present invention;
fig. 5 is a schematic view of a core mold structure provided by the present invention;
icon: 1-connecting a sleeve; 2-grouting holes; 3-core mold; 4-single section; 5-main body steel bar; 6-rubber plug; 7-lapping reinforcing steel bars; 8-a viewport assembly; 9-end template; 10-reserving a hole on a core mold; 11-a base mat layer; 12-core hole.
Detailed Description
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed when in use, the description is merely for convenience of describing the present invention and simplifying the description.
It should also be noted that the terms "disposed," "mounted," "connected," and "connected" should be construed broadly and specifically to mean that the terms are defined in the context of the present invention, as will be understood by those skilled in the art.
As shown in fig. 1 to 4, a construction method for preventing damage of a reinforcement bar overlapping structure includes the steps of:
s1: and a main body steel bar 5 and a connecting sleeve 1 are arranged on the foundation pad 11, and the connecting sleeve 1 is arranged at the lap joint position, the main body steel bar 5 and the connecting sleeve 1.
S10: a plurality of lapping positions are determined on the foundation mat 11, in this embodiment, in order to make the manufactured single section 4 have a plurality of stress points and avoid stress concentration in a region, the plurality of lapping positions are not collinear, and the main steel bar 5 with corresponding length dimension is processed according to the lapping positions, and the main steel bar 5 is connected at one end of the connecting sleeve 1.
S11: binding the main body steel bar 5 on the foundation pad layer 11 through steel wires; in this embodiment, connecting sleeve 1 can increase the steel wire and tie up, strengthens stably, prevents that the offset from appearing when follow-up pouring cement, influences the stability of overlap joint structure.
S12: one end of the connecting sleeve 1 is in coaxial threaded connection with the main reinforcing steel bar 5, the stability of the lap joint structure is improved, and further the structure shows that the arch wire on the inner wall of the connecting sleeve 1 forms an internal thread, the arch wire on the outer wall of the main reinforcing steel bar 5 forms an external thread, and the internal thread is matched with the external thread.
S2: the core mold 3 is fixed on the foundation mat 11 by binding, and the core mold 3 is connected with the connecting sleeve 1, it should be noted that at this time, the core mold 3 needs to block the other end of the connecting sleeve 1 to prevent the connecting sleeve 1 from being filled with concrete when concrete is poured.
S20: forming a core mold preformed hole 10 in one end template 9 of the basic cushion layer 11, wherein the core mold preformed hole 10 is required to be collinear with the axis of the main reinforcing steel bar 5; in this embodiment, the core mold prepared hole 10 functions to give support to the core mold 3 to make the core mold 3 in a horizontal state as much as possible; and this setting can guarantee that after follow-up concreting, the concrete can be totally with the mandrel 3 bury inside the concrete.
S21: coating demoulding oil on the core mould 3 and wrapping the core mould with a plastic film; this step, in this embodiment, facilitates later removal of the core mould 3.
Further, S22: the core mold 3 penetrates through the core mold preformed hole 10 to be connected with the connecting sleeve 1 through threads and fix the core mold 3; in another practical way, the core mold 3 is detachably connected with the connecting sleeve 1 in other ways, and both ways are used for enabling the core mold 3 to block the connecting sleeve 1.
S3: in order to facilitate the inspection of the quality of the connection at both ends of the connection sleeve 1, a viewport assembly 8 is mounted at the location of the connection sleeve.
S4: constructing an end template 9 on the other end surface of the foundation cushion layer 11, enclosing a mold cavity by the end template 9 and the foundation cushion layer 11, positioning a plurality of lap joint positions in the mold cavity, constructing the mold cavity, and pouring concrete into the mold cavity; furthermore, the end templates 9 and the end templates 9, and the end templates 9 and the foundation mat 11 can be connected through embedded connecting nails.
S5: forming a single section 4 after the concrete is solidified (namely the strength of the concrete meets the requirement), and forming a core hole 12 after the core mould 3 is removed in a slow spiral rotation mode; furthermore, the end template 9 can be removed according to actual conditions, so that the subsequent grouting holes 2 can be conveniently formed.
S6: and (2) forming a grouting hole 2, wherein the grouting hole 2 is close to the connecting sleeve 1, and further the structure is described, the axis of the grouting hole 2 is vertical to the axis of the core hole 12, and the grouting hole 2 is communicated with the core hole 12.
S7: utilize rubber buffer 6 shutoff slip casting hole 2 and core hole 12, bury the overlap joint structure among single section 4, avoid the overlap joint structure to receive the damage because of mechanical impact and humid environment corruption, accomplish the protection of overlap joint structure.
As shown in fig. 4, when a plurality of single segments 4 need to be spliced in an overlapping manner:
s8: placing the lap steel bar 7 in the core hole 12 and connecting with the connecting sleeve 1; the connection condition can be observed through the viewing port assembly 8.
And S80, cleaning the grouting hole 2 and the core hole 12 by using clear water to achieve the purpose of cleaning the hole and the effect of wetting the hole wall.
S9: and pulling off the rubber plug 6, grouting through the grouting hole 2 until the grout overflows from the core hole 12, and stopping grouting to finish splicing.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. 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 (8)
1. A construction method for preventing a steel bar lapping structure from being damaged is characterized by comprising the following steps of: the method comprises the following steps:
s1: a main body steel bar (5) and a connecting sleeve (1) are arranged on the foundation cushion layer (11), and the connecting sleeve (1) is arranged at the lap joint position;
s2: fixing the core mould (3) and connecting the core mould (3) with the connecting sleeve (1);
s3: a viewing port assembly (8) is arranged at the position of the connecting sleeve;
s4: constructing a mold cavity and pouring concrete into the mold cavity;
s5: forming a single section (4) after the concrete is solidified, and forming a core hole (12) after the core mould (3) is removed;
s6: a grouting hole (2) is formed, and the grouting hole (2) is communicated with the core hole (12);
s7: and the rubber plug (6) is used for plugging the grouting hole (2) and the core hole (12) to complete the protection of the lap joint structure.
2. The construction method for preventing damage of a reinforcing bar overlapping structure according to claim 1, wherein: the S1 includes the steps of:
s10: determining a plurality of lapping positions on the foundation mat (11), and processing main reinforcing steel bars (5) with corresponding sizes according to the lapping positions;
s11: binding the main body steel bar (5) on the foundation cushion layer (11);
s12: the connecting sleeve (1) is in coaxial threaded connection with the main body steel bar (5).
3. The construction method for preventing damage of a reinforcing bar overlapping structure according to claim 1, wherein: the S2 includes the steps of:
s20: a core mold preformed hole (10) is formed in one end template (9) of the foundation mat (11), and the core mold preformed hole (10) is required to be collinear with the axis of the main reinforcing steel bar (5);
s21: coating demolding oil on the core mold (3) and wrapping the core mold with a plastic film;
s22: and (3) passing the core mold (3) through the core mold preformed hole (10) to be connected with the connecting sleeve (1) and fixing the core mold (3).
4. The construction method for preventing damage of a reinforcing bar overlapping structure according to claim 1, wherein: and in the step S4, the mode of forming the die cavity is that the die cavity is surrounded by the end template (9) on the other end surface of the foundation mat layer (11), the end template (9) and the foundation mat layer (11).
5. The construction method for preventing damage of a reinforcing bar overlapping structure according to claim 1, wherein: the grouting hole (2) in the step S6 is close to the connecting sleeve (1).
6. The construction method for preventing damage of a reinforcing bar overlapping structure according to claim 1, wherein: before the step of S7, the inner wall of the core hole (12) may be roughened, and the inside of the core hole (12) may be cleaned.
7. The construction method for preventing damage of a reinforcing bar overlapping structure according to claim 2, wherein: the plurality of overlapping locations are non-collinear.
8. The construction method for preventing damage of a reinforcing bar lap joint structure according to any one of claims 1 to 7, wherein: when a plurality of single sections (4) need to be spliced in an overlapping mode,
s8: placing the lap joint steel bar (7) in the core hole (12) and connecting the lap joint steel bar with the connecting sleeve (1);
s9: grouting is carried out through the grouting holes (2) until grout overflows from the core holes (12), and then grouting is stopped, so that splicing is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449136.0A CN113216251A (en) | 2021-04-25 | 2021-04-25 | Construction method for preventing damage of steel bar lap joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449136.0A CN113216251A (en) | 2021-04-25 | 2021-04-25 | Construction method for preventing damage of steel bar lap joint structure |
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| CN113216251A true CN113216251A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110449136.0A Pending CN113216251A (en) | 2021-04-25 | 2021-04-25 | Construction method for preventing damage of steel bar lap joint structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203866973U (en) * | 2014-04-11 | 2014-10-08 | 沈阳卫德住宅工业化科技有限公司 | Inner-thread large-hole grouting sleeve of concrete precast component for housing industrialization |
| CN105019558A (en) * | 2015-08-02 | 2015-11-04 | 长安大学 | Steel bar anchoring connection structure and connection method for precast fabricated concrete components |
| CN205975996U (en) * | 2016-08-24 | 2017-02-22 | 中国航天建设集团有限公司 | Thick liquid anchor lap joint structure and wall body |
| CN207905121U (en) * | 2018-01-10 | 2018-09-25 | 南通市建筑设计研究院有限公司 | Precast concrete constraint slurry anchor overlaps connection structure |
-
2021
- 2021-04-25 CN CN202110449136.0A patent/CN113216251A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203866973U (en) * | 2014-04-11 | 2014-10-08 | 沈阳卫德住宅工业化科技有限公司 | Inner-thread large-hole grouting sleeve of concrete precast component for housing industrialization |
| CN105019558A (en) * | 2015-08-02 | 2015-11-04 | 长安大学 | Steel bar anchoring connection structure and connection method for precast fabricated concrete components |
| CN205975996U (en) * | 2016-08-24 | 2017-02-22 | 中国航天建设集团有限公司 | Thick liquid anchor lap joint structure and wall body |
| CN207905121U (en) * | 2018-01-10 | 2018-09-25 | 南通市建筑设计研究院有限公司 | Precast concrete constraint slurry anchor overlaps connection structure |
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Application publication date: 20210806 |