CN101289866A - Construction method for precasting concrete moulding bed in local pit of base pit engineering under soft foundation - Google Patents
Construction method for precasting concrete moulding bed in local pit of base pit engineering under soft foundation Download PDFInfo
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- CN101289866A CN101289866A CNA2007100395171A CN200710039517A CN101289866A CN 101289866 A CN101289866 A CN 101289866A CN A2007100395171 A CNA2007100395171 A CN A2007100395171A CN 200710039517 A CN200710039517 A CN 200710039517A CN 101289866 A CN101289866 A CN 101289866A
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Abstract
The invention relates to a construction method for local deep-pit prefabricated concrete tire shuttering in the foundation pit engineering under soft soil foundation. The method comprises the following steps that: 1) earthwork is excavated to a large-area deep-pit bottom, and then a cushion layer is poured and tamped; 2) a reinforced concrete tire shuttering is prefabricated in advance according to the planar dimension and the depth of a local deep pit, and the prefabricated reinforced concrete tire shuttering is arranged in the pit when the earthwork at the local deep pit is excavated to the designed elevation; 3) the backfill is performed, and the vacancy filling of the cushion layer at the local deep pit is performed; 4) a large bottom plate and structural reinforcing steel bars in the local deep pit are bound for construction, a deep-pit internal mould is arranged and is fixed with the reinforcing steel bars on the bottom plate, and then structural concrete of the bottom plate is poured and tamped. The method has the advantages that: the method has less process steps, the prefabricated tire shuttering is performed beforehand, and scattered and redundant concrete can be used for pouring and tamping; the construction speed is quick, the construction of the tire shuttering can backfill to bear pressure without waiting for enough strength; the method has less process steps and quick construction speed, which contributes to the stability of the foundation pit; and the reinforced concrete tire shuttering has large strength and rigidity and is not easy to distort, and the quality of the foundation structure is easy to be guaranteed.
Description
Technical field
The present invention relates to the correlative technology field of building operations, relate to that the sole plate part falls to hanging down going along with sb. to guard him and template system of dell in the construction of industrial civil building, municipal public use engineering structures, particularly a kind of at the bottom of the large tracts of land excavation pit during local dell construction, replace the job practices of the exterior sheathing of temporarily going along with sb. to guard him of this part dell and this hole inner concrete structure with the prefabricated reinforced concrete loose tool.
Background technology
At industrial civil building, during the municipal engineering foundation construction, during architectural design in foundation structure operated by rotary motion collecting well, equipment raise etc.Therefore when structure construction, it is low that sole plate wants the part to fall, and forms local dell at the bottom of the large-scale excavation.Fall to hanging down in the construction of dell base plate in traditional part, general construction process is as follows:
A. soil excavation waters subsequently and smashes bed course (in local dell position bed course vacancy) at the bottom of the large tracts of land dell.
B. carry out local stiffening (end, hole, limit, hole) at local dell position;
C. the slope excavation is put in the position earthwork of local dell, waters and smashes local dell concrete cushion, builds brick loose tool (being dell inner concrete structure exterior sheathing) by laying bricks or stones;
D. local dell position brick loose tool outside backfill, large tracts of land dell foot mat fill a vacancy (secondary waters and smashes);
E. big base plate and the construction of local dell inner structure reinforcing bar binding are installed local dell inner formword, subsequently disturbing concrete.
The tradition part lower part base plate dell construction drawback that falls is as follows:
A. processing step is many, as above-mentioned description, need cheat the end, hole limit soil stabilization once more at local dell position, and bed course will divide secondary to water to smash;
B. speed of application is slow, the earthwork easily takes place in local dell soil excavation process cave in;
C. because processing step is many, and speed of application is slow, come risk for the foundation ditch stabilized zone;
D. and after the brick loose tool will wait until certain intensity, just can carry out the later process construction, the brick loose tool can not bear big soil pressure, is easy to generate distortion, other operation construction in the influence hole.
Summary of the invention
The objective of the invention is for local dell precast concrete loose tool job practices in the base pit engineering is provided under a kind of soft foundation, reduce the construction technology step, accelerating construction progress, improve going along with sb. to guard him and template system of structural concrete quality, solved that traditional part falls that lower part base plate dell job practices processing step is many, speed of application slowly, the not good problem of construction quality.
For achieving the above object, the present invention has adopted following technical scheme:
The invention discloses under a kind of soft foundation local dell precast concrete loose tool job practices in the base pit engineering, it is characterized in that, may further comprise the steps:
A. soil excavation waters subsequently and smashes bed course (in local dell position bed course vacancy) at the bottom of the large tracts of land dell;
B. press the local dell planar dimension and degree of depth prefabricated reinforced concrete loose tool in advance, treat local dell place soil excavation, the prefabricated reinforced concrete loose tool is installed in the hole to design elevation;
C. backfill, and carry out local dell place bed course and fill a vacancy;
D. big base plate and the construction of local dell inner structure reinforcing bar binding are installed dell internal mold and base plate reinforcing bar and are fixed, and water subsequently and smash the base arrangement concrete.
Wherein, described prefabricated reinforced concrete loose tool is one the casing at the end to be arranged.
Because adopted above scheme, the beneficial effect that the present invention is possessed is:
A. processing step is few.Prefabricated moulding bedly carry out available fragmentary unnecessary casting and compacting of concrete in advance.
B. speed of application is fast.The loose tool installation is intact, just can carry out backfill immediately and bear pressure.
C. processing step is few, and speed of application is fast, and it is stable to help foundation ditch.
D. steel concrete loose tool intensity, rigidity are big, are not easy to produce distortion, and the foundation structure quality guarantees easily.
E. reduce expenses, can save the soil stabilization expense at local dell position.
Description of drawings
Fig. 1-Fig. 4 is the structural representation of construction process of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Local dell precast concrete loose tool job practices in the base pit engineering under a kind of soft foundation as Fig. 1-shown in Figure 4, may further comprise the steps:
A. soil excavation waters subsequently and smashes bed course 2 (in local dell position bed course vacancy) at the bottom of the large tracts of land dell 1.
B. press the local dell planar dimension and degree of depth prefabricated reinforced concrete loose tool 3 in advance, treat local dell place soil excavation, prefabricated reinforced concrete loose tool 3 is installed in the hole to design elevation;
D. big base plate and the construction of local dell inner structure reinforcing bar binding, it is fixing with base plate reinforcing bar 7 that dell internal mold 6 is installed, and waters subsequently and smash the base arrangement concrete eight.
Wherein, described prefabricated reinforced concrete loose tool 3 is one the casing at the end to be arranged.
The present invention adopts the prefabricated reinforced concrete loose tool to replace traditional brick loose tool, can reduce the construction technology step, and accelerating construction progress improves construction quality.The prefabricated reinforced concrete loose tool presses the dell planar dimension and the degree of depth is prefabricated in advance, and its thickness, concrete grade (generally adopt C20, C30) calculate by soil pressure and determine.
Claims (2)
1, local dell precast concrete loose tool job practices in the base pit engineering under the soft foundation is characterized in that, may further comprise the steps:
A. soil excavation waters subsequently and smashes bed course at the bottom of the large tracts of land dell;
B. press the local dell planar dimension and degree of depth prefabricated reinforced concrete loose tool in advance, treat local dell place soil excavation, the prefabricated reinforced concrete loose tool is installed in the hole to design elevation;
C. backfill, and carry out local dell place bed course and fill a vacancy;
D. big base plate and the construction of local dell inner structure reinforcing bar binding are installed dell internal mold and base plate reinforcing bar and are fixed, and water subsequently and smash the base arrangement concrete.
2, local dell precast concrete loose tool job practices in the base pit engineering under the soft foundation according to claim 1 is characterized in that: described prefabricated reinforced concrete loose tool is one the casing at the end to be arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100395171A CN101289866A (en) | 2007-04-16 | 2007-04-16 | Construction method for precasting concrete moulding bed in local pit of base pit engineering under soft foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100395171A CN101289866A (en) | 2007-04-16 | 2007-04-16 | Construction method for precasting concrete moulding bed in local pit of base pit engineering under soft foundation |
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| Publication Number | Publication Date |
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| CN101289866A true CN101289866A (en) | 2008-10-22 |
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| CNA2007100395171A Pending CN101289866A (en) | 2007-04-16 | 2007-04-16 | Construction method for precasting concrete moulding bed in local pit of base pit engineering under soft foundation |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433892A (en) * | 2011-12-30 | 2012-05-02 | 中铁二局股份有限公司 | Construction method for cover-excavation reverse method soil moulding bed |
| CN102505709A (en) * | 2011-11-03 | 2012-06-20 | 浙江天力建设集团有限公司 | Concrete-formwork-precast foundation construction method |
| CN102535476A (en) * | 2010-12-27 | 2012-07-04 | 上海勘测设计研究院 | Method for reducing side load influence |
| CN102877485A (en) * | 2012-10-12 | 2013-01-16 | 绍兴县明煌建材科技有限公司 | Ground beam bearing platform moulding bed |
| CN103469806A (en) * | 2013-09-25 | 2013-12-25 | 浙江天力建设集团有限公司 | Construction method for replacing brick forming die with prefabricated concrete foundation bearing platform side die |
| CN104213565A (en) * | 2014-09-18 | 2014-12-17 | 广西建工集团第五建筑工程有限责任公司 | Die supporting system for large deep pit steep slope surface cushion layer and supporting die casting construction method thereof |
| CN104846837A (en) * | 2015-04-10 | 2015-08-19 | 江苏南通三建集团有限公司 | Construction method for ultra-deep well pit in surface drainage foundation pit |
| CN107288155A (en) * | 2017-07-27 | 2017-10-24 | 平湖市开元混凝土有限公司 | A kind of method for fast mfg of small underground concrete structure |
| CN109763508A (en) * | 2019-01-26 | 2019-05-17 | 中煤地建设工程有限公司 | A kind of domatic isolated footing structure |
| CN113136876A (en) * | 2021-03-19 | 2021-07-20 | 中国建筑第八工程局有限公司 | Construction method of pipe trench |
| CN113550318A (en) * | 2021-08-03 | 2021-10-26 | 中国十七冶集团有限公司 | Construction method of prefabricated caisson mold capable of replacing brick mold with mucky soil |
| CN114718112A (en) * | 2022-04-12 | 2022-07-08 | 中天建设集团有限公司 | Construction method for erecting formwork of pit-in-pit of vertical wall pit |
| CN114718112B (en) * | 2022-04-12 | 2024-05-03 | 中天建设集团有限公司 | Pit formwork construction method in straight wall pit |
-
2007
- 2007-04-16 CN CNA2007100395171A patent/CN101289866A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535476A (en) * | 2010-12-27 | 2012-07-04 | 上海勘测设计研究院 | Method for reducing side load influence |
| CN102535476B (en) * | 2010-12-27 | 2014-06-18 | 上海勘测设计研究院 | Method for reducing side load influence |
| CN102505709A (en) * | 2011-11-03 | 2012-06-20 | 浙江天力建设集团有限公司 | Concrete-formwork-precast foundation construction method |
| CN102433892A (en) * | 2011-12-30 | 2012-05-02 | 中铁二局股份有限公司 | Construction method for cover-excavation reverse method soil moulding bed |
| CN102877485A (en) * | 2012-10-12 | 2013-01-16 | 绍兴县明煌建材科技有限公司 | Ground beam bearing platform moulding bed |
| CN103469806A (en) * | 2013-09-25 | 2013-12-25 | 浙江天力建设集团有限公司 | Construction method for replacing brick forming die with prefabricated concrete foundation bearing platform side die |
| CN104213565B (en) * | 2014-09-18 | 2016-05-18 | 广西建工集团第五建筑工程有限责任公司 | A kind of formwork system that is applicable to large-scale deep trouth hole sty bed course and formwork thereof water smashes construction method |
| CN104213565A (en) * | 2014-09-18 | 2014-12-17 | 广西建工集团第五建筑工程有限责任公司 | Die supporting system for large deep pit steep slope surface cushion layer and supporting die casting construction method thereof |
| CN104846837A (en) * | 2015-04-10 | 2015-08-19 | 江苏南通三建集团有限公司 | Construction method for ultra-deep well pit in surface drainage foundation pit |
| CN107288155A (en) * | 2017-07-27 | 2017-10-24 | 平湖市开元混凝土有限公司 | A kind of method for fast mfg of small underground concrete structure |
| CN107288155B (en) * | 2017-07-27 | 2020-12-25 | 平湖市开元混凝土股份有限公司 | Rapid manufacturing method of small underground concrete structure |
| CN109763508A (en) * | 2019-01-26 | 2019-05-17 | 中煤地建设工程有限公司 | A kind of domatic isolated footing structure |
| CN113136876A (en) * | 2021-03-19 | 2021-07-20 | 中国建筑第八工程局有限公司 | Construction method of pipe trench |
| CN113550318A (en) * | 2021-08-03 | 2021-10-26 | 中国十七冶集团有限公司 | Construction method of prefabricated caisson mold capable of replacing brick mold with mucky soil |
| CN114718112A (en) * | 2022-04-12 | 2022-07-08 | 中天建设集团有限公司 | Construction method for erecting formwork of pit-in-pit of vertical wall pit |
| CN114718112B (en) * | 2022-04-12 | 2024-05-03 | 中天建设集团有限公司 | Pit formwork construction method in straight wall pit |
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Open date: 20081022 |