CN112459126A - Method for closing underground garage settlement post-cast strip in advance - Google Patents
Method for closing underground garage settlement post-cast strip in advance Download PDFInfo
- Publication number
- CN112459126A CN112459126A CN202011248079.1A CN202011248079A CN112459126A CN 112459126 A CN112459126 A CN 112459126A CN 202011248079 A CN202011248079 A CN 202011248079A CN 112459126 A CN112459126 A CN 112459126A
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- Prior art keywords
- post
- cast strip
- cover plate
- concrete
- template
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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
- E02D29/16—Arrangement or construction of joints in foundation structures
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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
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- 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/38—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings for plane ceilings of concrete
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- 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
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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
- E02D2250/0007—Production methods using a mold
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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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A method for closing a subsided post-cast strip of an underground garage in advance belongs to the technical field of closing the post-cast strip of the underground garage of building engineering. The method comprises the steps of binding post-cast strip steel bars according to the requirements of drawings when the strength of a top plate of an underground garage meets the requirements and upper processes such as waterproofing, backfilling, small city administration and the like need to be inserted in advance, erecting a post-cast strip supporting system by adopting steel pipes, battens and templates in the garage, installing a cover plate template and the supporting system on the upper portion of a post-cast strip, binding steel bars on the completed cover plate template, embedding a post-cast strip casting pump pipe, casting a concrete cover plate with the thickness of 100mm, constructing the top plate in the waterproofing and other processes on the upper portion, casting post-cast strip concrete after meeting the requirements of the drawings and specifications, and dismantling a lower supporting system after the concrete reaches the designed strength. The method has the advantages that the problem that the upper processes such as upper waterproof, backfilling, municipal pipelines and landscaping cannot be constructed due to the fact that the garage top plate structure cannot be sealed is solved, construction period progress is accelerated, and delay risks of project delivery are reduced.
Description
Technical Field
The invention belongs to the technical field of construction of underground garage roof post-cast strip of building engineering, and particularly provides a method for closing a subsided post-cast strip of an underground garage in advance, which is beneficial to constructing the underground garage roof in advance for water prevention, backfilling, municipal pipelines, landscaping and the like, accelerating the progress of construction period and reducing delay risks.
Background
At present, domestic civil building engineering is influenced by environmental protection, production limit, shutdown and the like, and the construction period progress is increasingly urgent. In civil building engineering, the underground garage roof generally sets up subsides post-cast strip, and according to the standard requirement, the underground garage roof subsides post-cast strip and generally can pour in two months of main building capping in the garage, and this just leads to before the garage roof structure seals the completion, upper processes such as upper portion waterproof, backfill soil, municipal pipeline and afforestation can't be under construction, and the time limit of a project progress receives great influence, and the engineering can not be delivered as scheduled. This problem has plagued building construction units.
Disclosure of Invention
The invention aims to provide a method for closing a post-subsidence pouring belt of an underground garage in advance, which solves the problem that the upper processes such as upper waterproof, backfilling, municipal pipeline and landscaping cannot be constructed due to the fact that the top plate structure of the garage cannot be closed, accelerates the construction period progress and reduces the delay risk of project delivery. The construction method comprises the following steps:
(1) binding post-cast steel bars 1;
(2) erecting a post-cast strip supporting system 2 and a post-cast strip template body system 3;
(3) installing a post-cast strip top cover plate supporting system 4 and a cover plate template system 5;
(4) binding post-cast strip cover plate steel bars 6;
(5) reserving a post-cast strip and pouring a pump pipe 7;
(6) pouring post-cast strip cover plate concrete 8;
(7) upper waterproofing and other subsequent construction 9;
(8) after the construction intermittence is met, the post-cast strip concrete (10) is poured by utilizing the post-cast strip reserved pump pipe (7);
(9) and (3) dismantling the support (2) and the template system (3) after the strength of the post-cast strip meets the requirement.
According to the invention, the post-cast strip steel bar 1 is constructed according to the drawing; the post-cast strip supporting system 2 is formed by erecting common steel pipes by bowl fasteners; the post-cast strip template body system 3 adopts 50X 50 square steel pipes as main keels, 50X 80mm battens as secondary keels and 12.5mm wood templates as templates; the cover plate supporting system 4 adopts phi 20 steel bars to self-manufacture a Martin brace; the cover plate template system 5 adopts 50 x 80mm battens, and the template adopts a 12.5mm wood template; the cover plate steel bar 6 is a phi 12 double-layer bidirectional steel bar net sheet; the post-cast strip pouring pump pipe 7 is a phi 100 welded steel pipe and is arranged at a distance of 4000 mm; the strength of the cover plate concrete 8 is C30, and the thickness is 100 mm; the post-cast strip concrete 10 is self-compacting concrete, and the strength and other characteristics are required according to the drawing.
The garage roof structure is closed in advance by adding the post-cast strip cover plate before the post-cast strip of the garage roof does not reach the clearance period specified by the specification, so that the upper process construction of subsequent waterproof, backfilling, municipal pipeline, landscaping and the like is facilitated, and the effects of accelerating the construction progress and reducing the risk of construction period are achieved.
The invention has the beneficial effects that:
1. the advancement is as follows: simple process and easy construction.
2. The necessity: and sealing the post-cast strip of the top plate of the garage in advance so as to carry out upper process construction such as waterproofing, backfilling and the like.
3. The cost is saved: the method has the advantages that the construction period progress is accelerated, the construction period risk is reduced, and the construction period cost is saved.
Drawings
FIG. 1 is a schematic diagram of the present invention. The concrete-filled post-cast strip comprises post-cast strip steel bars 1, a post-cast strip support system 2, a post-cast strip formwork system 3, a cover plate support system 4, a cover plate formwork system 5, cover plate steel bars 6, a post-cast strip casting pump pipe 7, cover plate concrete 8, upper waterproof and other follow-up construction and post-cast strip concrete 10.
Detailed Description
In order that the method of the present invention may be more readily and clearly understood, a brief description of the practice of the method follows.
1. Construction operation process
And (3) binding post-cast steel bars → constructing a lower support system and a template system → installing a post-cast strip cover plate support system and a template system → binding post-cast strip cover plate steel bars → pouring pump pipes of the pre-embedded post-cast strip → pouring of cover plate concrete → constructing waterproof and other upper procedures → pouring of post-cast strip concrete → dismantling of the post-cast strip support system and the template system.
2. Post-cast steel bar binding
And binding the internal steel bars of the post-cast strip according to the requirements of the drawing.
3. Construction of lower supporting system of post-pouring belt
3.1 preparation work
And after the post-cast strip steel bars are cleaned and bound, the post-cast strip is closed after being checked and accepted by concealment.
3.2, the post-cast strip adopts a buckle type support system, the vertical rods are 600mm in longitudinal and transverse spacing, the distance between the inner vertical rods and the edge of the post-cast strip is 100mm, and the length of the free ends of the vertical rods is not more than 300 mm; the step distance of the cross bars is 1800mm and not less than 3 tracks, and the longitudinal and transverse sweeping rods are 300mm away from the ground; the bottom of the upright stanchion of the scaffold is provided with a multi-layer plate cushion block, the main keel adopts 2 square steel pipes with the length of 50 x 3mm, the secondary keel adopts a wood beam with the length of 50 x 80mm, and the cross braces are arranged at intervals of 3m along the longitudinal direction of the post-cast strip.
4. Post-cast strip cover plate template installation
Two 50 x 80mm battens are respectively placed on two sides of the upper portion of the 4.1 post-cast strip, the upper portion of the post-cast strip is firmly nailed by a 12.5mm post-common wood template, a Martin reinforcing steel bar supporting template is placed on the lower portion of the template, the Martin reinforcing steel bars are made of phi 20 reinforcing steel bars in a self-made mode, and the interval is 1000 mm.
5. Binding and concrete pouring of post-cast strip cover plate steel bars
And 5.1 binding three-level phi 12 double-layer bidirectional reinforcing mesh sheets after the template is installed, embedding 1000mm high post-cast strip pouring pump pipes, and arranging at an interval of 4000 mm. And pouring a C30 concrete post-cast strip cover plate with the thickness of 100 mm.
6. Waterproofing and other subsequent construction
And (5) constructing declaration procedures such as garage roof waterproofing, backfilling, municipal garden and the like according to drawing requirements.
7. Post-cast strip concrete pouring
7.1 determining the casting time of the post-cast strip
After the main structure is constructed, the settlement observation data is analyzed by the design, investigation and pile foundation construction units, and after the settlement of the main building is confirmed to be stable, the post-cast strip concrete is allowed to be poured.
7.2 preparation of self-compacting concrete
Firstly, adopting self-compacting concrete for post-cast strip concrete:
secondly, the self-compacting concrete is mixed by commercial method, and the mixture ratio is specially designed and tested.
7.3 post-cast strip concrete pouring
(1) The self-compacting concrete pouring is continuously carried out, and the interruption time is not more than 30 min.
(2) Opening the reserved post-cast strip pouring pump pipe, putting a vibrating rod,
(3) before concrete pouring, water is poured to moisten the concrete and the template, so that the self-compacting concrete is prevented from being dehydrated and the flowability is prevented from being influenced.
(4) And carrying out slump, expansion and workability tests on the self-compacting concrete on site to ensure that the self-compacting concrete meets the technical requirements.
(5) And pouring the post-cast strip from one section to the other end at one time, pouring concrete into the pump pipe from each post-cast strip, stopping pumping when the concrete flows through the pipe orifice of the adjacent pre-embedded pump pipe, performing second pre-embedded pump pipe concrete construction, vibrating the vibrating rod with the post to ensure that the concrete in the iron pipe is 500mm higher than the top plate until the post-cast strip is poured.
(6) In the concrete pouring process, the concrete pouring height is observed and measured through the reserved pump pipe, and if the self-compacting concrete exceeds the height of the cover plate, the requirement is met, and the concrete pouring is smoothly completed. If the height of the poured concrete is found to be insufficient, the concrete pouring in the post-pouring zone is not solid, the CGM-1 type high-strength grouting material is adopted for secondary grouting before the initial setting of the concrete, a phi 50 vibrating rod is adopted for inserting and falling during the pouring, the flow is guided, and the self-compacting concrete and the grouting material are combined into a whole.
Claims (2)
1. The method for closing the post-cast strip after the settlement of the underground garage in advance is characterized by comprising the following construction steps of:
1) binding post-cast strip steel bars (1);
2) building a post-cast strip supporting system (2) and a template system (3);
3) installing a post-cast strip top cover plate supporting system (4) and a template system (5);
4) binding post-cast strip cover plate steel bars (6);
5) reserving a post-cast strip pouring pump pipe (7);
6) pouring post-cast strip cover plate concrete (8);
7) waterproofing of the upper part and other subsequent constructions (9);
8) after the construction intermittence is met, the post-cast strip concrete (10) is poured by utilizing the post-cast strip reserved pump pipe (7);
9) and (3) dismantling the support (2) and the template system (3) after the strength of the post-cast strip meets the requirement.
2. The method for closing the underground garage settlement post-cast strip in advance as claimed in claim 1, wherein the post-cast strip support system (2) is erected by a bowl fastener for a common steel pipe; the main keel of the post-cast strip template system (3) adopts a 50X 50 square steel pipe, the secondary keel adopts a 50X 80mm batten, and the template adopts a 12.5mm timber template; the cover plate supporting system (4) adopts phi 20 steel bars to self-manufacture a Martin brace; the cover plate template system (5) adopts 50 x 80mm battens, and the templates adopt 12.5mm wood templates; the cover plate steel bar (6) is a phi 12 double-layer bidirectional steel bar net sheet; the post-cast strip pouring pump pipe (7) is a phi 100 welded steel pipe and is arranged at a distance of 4000 mm; the strength of the cover plate concrete (8) is C30, and the thickness is 100 mm; the post-cast strip concrete (10) is self-compacting concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248079.1A CN112459126A (en) | 2020-11-10 | 2020-11-10 | Method for closing underground garage settlement post-cast strip in advance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248079.1A CN112459126A (en) | 2020-11-10 | 2020-11-10 | Method for closing underground garage settlement post-cast strip in advance |
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| Publication Number | Publication Date |
|---|---|
| CN112459126A true CN112459126A (en) | 2021-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011248079.1A Pending CN112459126A (en) | 2020-11-10 | 2020-11-10 | Method for closing underground garage settlement post-cast strip in advance |
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| Country | Link |
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| CN (1) | CN112459126A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585351A (en) * | 2021-09-08 | 2021-11-02 | 中建五局第三建设有限公司 | Soil covering plane settlement post-cast strip prefabrication advanced reverse order closed construction method |
| CN115387392A (en) * | 2022-08-23 | 2022-11-25 | 中国五冶集团有限公司 | Basement post-cast strip construction structure and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805870A (en) * | 2015-04-16 | 2015-07-29 | 中国二十二冶集团有限公司 | Construction method for first soil filling and then casting at settlement post-cast strip of top plate of basement |
| CN105350581A (en) * | 2015-10-10 | 2016-02-24 | 中建二局第二建筑工程有限公司 | Advanced sealing structure for basement top slab settlement post-cast strips |
| CN205444255U (en) * | 2016-03-30 | 2016-08-10 | 山东三箭建设工程股份有限公司 | Basement roof subsides leading closing means in post -cast strip |
| CN211113772U (en) * | 2019-09-23 | 2020-07-28 | 中建一局集团第三建筑有限公司 | Post-cast strip structure for top plate of underground chamber |
-
2020
- 2020-11-10 CN CN202011248079.1A patent/CN112459126A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805870A (en) * | 2015-04-16 | 2015-07-29 | 中国二十二冶集团有限公司 | Construction method for first soil filling and then casting at settlement post-cast strip of top plate of basement |
| CN105350581A (en) * | 2015-10-10 | 2016-02-24 | 中建二局第二建筑工程有限公司 | Advanced sealing structure for basement top slab settlement post-cast strips |
| CN205444255U (en) * | 2016-03-30 | 2016-08-10 | 山东三箭建设工程股份有限公司 | Basement roof subsides leading closing means in post -cast strip |
| CN211113772U (en) * | 2019-09-23 | 2020-07-28 | 中建一局集团第三建筑有限公司 | Post-cast strip structure for top plate of underground chamber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585351A (en) * | 2021-09-08 | 2021-11-02 | 中建五局第三建设有限公司 | Soil covering plane settlement post-cast strip prefabrication advanced reverse order closed construction method |
| CN115387392A (en) * | 2022-08-23 | 2022-11-25 | 中国五冶集团有限公司 | Basement post-cast strip construction structure and method |
| CN115387392B (en) * | 2022-08-23 | 2023-12-15 | 中国五冶集团有限公司 | Basement post-pouring strip construction structure and method |
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Application publication date: 20210309 |