CN101942841A - Method for constructing reversed beam type raft plate foundation - Google Patents
Method for constructing reversed beam type raft plate foundation Download PDFInfo
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- CN101942841A CN101942841A CN 201010506328 CN201010506328A CN101942841A CN 101942841 A CN101942841 A CN 101942841A CN 201010506328 CN201010506328 CN 201010506328 CN 201010506328 A CN201010506328 A CN 201010506328A CN 101942841 A CN101942841 A CN 101942841A
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- reversed beam
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- raft plate
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Abstract
The invention discloses a method for constructing a reversed beam type raft plate foundation, which comprises the following steps of: 1) leveling after the foundation is dug to a bearing stratum; 2) pouring a concrete cushion in an area outside a reversed beam according to laying off of a reversed beam working drawing to keep the bearing stratum undisturbed; and 3) digging a reversed beam foundation trench, after the reversed beam foundation trench is subjected to wall stabilizing, mounting reinforcing steel bars and pouring the concrete to obtain the reversed beam type raft plate foundation. The method for constructing the reversed beam type raft plate foundation provided by the invention realizes less disturbance in undisturbed soil of the bearing stratum when the reversed beam type raft plate foundation is constructed, erasures the bearing capacity of foundation soil, and solves the problem of non-uniform subsidence of a building caused by poor construction quality by the method for constructing a cushion course, then digging the reversed beam foundation trench and performing wall stabilizing on the reversed beam foundation trench.
Description
Technical field
The present invention relates to a kind of foundation construction method, particularly a kind of job practices of reversed beam formula raft foundation.
Background technology
Reversed beam formula raft foundation is that independent foundation under column or strip foundation are all connected with the contact beam, integrated poured more below base plate.Adopt the beam type raft foundation when the inhomogeneous or ground of bearing capacity of foundation soil is weak in general.And beam type raft foundation buried depth is superficial, even can not buried depth formula basis.Building load is bigger, bearing capacity of foundation soil a little less than, often adopt concrete floor, bear building load, form raft foundation, its good integrity can well be resisted uneven settlement of foundation.
Yet because the form of structure of reversed beam formula raft foundation causes its difficulty of construction bigger, conventional job practices is easy to cause the disturbance of bearing stratum undisturbed soil, causes hidden danger of quality or accidents such as bearing capacity of foundation soil decline or unequal settlement of building.Many house excessive differential settlement causal investigation analyses are learnt that belong to the inconsiderate person of design and account for 21%, the person accounts for 70% to belong to the construction problem, belongs to applying unit mismanagement person and accounts for 9% according to units concerned.This shows, although the reason that accident produces is many-sided, wherein improves and note construction quality, then is the important measures of avoiding accident to take place.
Summary of the invention
Technical problem to be solved by this invention provides a kind of job practices of reversed beam formula raft foundation, to the disturbance of bearing stratum undisturbed soil, guarantees bearing capacity of foundation soil in the time of can reducing the construction of reversed beam formula raft foundation, prevents building generation differential settlement.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of job practices of reversed beam formula raft foundation may further comprise the steps:
1) examine to the bearing stratum flat at foundation excavation;
2) according to reversed beam working drawing laying-down, the regional concreting bed course beyond reversed beam is not subjected to disturbance with the protection bearing stratum;
3) excavation reversed beam foundation trench, reversed beam foundation trench carry out after Gu Bi handles reinforcing bar, concreting being installed;
By above-mentioned steps, obtain reversed beam formula raft foundation.
The excavation of reversed beam groove be operated in blinding concrete reach design strength 75% after carry out.
The Gu Bi of reversed beam groove is treated at reversed beam groove sidewall and floor and adopts saturated brick building.
The job practices of a kind of reversed beam formula raft foundation provided by the invention, carry out the reversed beam excavating foundation trench again by carrying out cushion construction earlier, and the method that cooperates reversed beam foundation trench Gu Bi to handle, when having realized reducing the construction of reversed beam formula raft foundation to the disturbance of bearing stratum undisturbed soil, guarantee bearing capacity of foundation soil, prevent the problem of the differential settlement of buildings that causes because of construction quality.
The specific embodiment
Certain dwelling house has 4 layers, 6 layers, 9 layers, 11 layers four kinds building forms, and area does not wait from 98 ㎡-248 ㎡, all dwelling houses are full elevator garden foreign-style house, pure frame, one lift with two users plank frame, its geology major part is a collapsible loess, it is dark that overburden cover reaches 15-25 rice.If excavate collapsible loess, then engineering quantity will increase greatly, and in order to save construction costs, design side has adopted reversed beam formula raft foundation, has so both saved investment, can satisfy the ground design specifications again.But the conventional job practices of reversed beam formula raft foundation, the undisturbed soil of interference bearing stratum greatly.In this example,, dig to the underground 6m degree of depth and be the bearing stratum on raft foundation floor and examine flatly, can carry out reversed beam groove excavation by inspection according to log sheet.Before reversed beam groove excavation, carry out the construction lofting line, mark reversed beam groove zone in addition, at these regional concreting bed courses, former design has the 30cm blinding concrete, strength grade C15, treat blinding concrete reach design strength 75% after, carry out the excavation work of reversed beam groove again, saturated brick building all adopted on reversed beam groove sidewall and floor, and, also can be used as the bed course of reversed beam simultaneously as building the concrete template disposably and permanently of reversed beam.Adopt the reversed beam formula raft foundation of above-mentioned steps construction, both satisfied the structural requirement of design, guaranteed that also soil supporting layer is not subjected to the artificial perturbation, also do not increase construction investment.
Claims (3)
1. the job practices of a reversed beam formula raft foundation is characterized in that may further comprise the steps:
1) examine to the bearing stratum flat at foundation excavation;
2) according to reversed beam working drawing laying-down, the regional concreting bed course beyond reversed beam is not subjected to disturbance with the protection bearing stratum;
3) excavation reversed beam foundation trench, reversed beam foundation trench carry out after Gu Bi handles reinforcing bar, concreting being installed;
By above-mentioned steps, obtain reversed beam formula raft foundation.
2. the job practices of a kind of reversed beam formula raft foundation according to claim 1 is characterized in that: the excavation of reversed beam groove be operated in blinding concrete reach design strength 75% after carry out.
3. the job practices of a kind of reversed beam formula raft foundation according to claim 1 is characterized in that: the Gu Bi of reversed beam groove is treated at reversed beam groove sidewall and floor and adopts saturated brick building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010506328 CN101942841A (en) | 2010-10-14 | 2010-10-14 | Method for constructing reversed beam type raft plate foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010506328 CN101942841A (en) | 2010-10-14 | 2010-10-14 | Method for constructing reversed beam type raft plate foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101942841A true CN101942841A (en) | 2011-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010506328 Pending CN101942841A (en) | 2010-10-14 | 2010-10-14 | Method for constructing reversed beam type raft plate foundation |
Country Status (1)
| Country | Link |
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| CN (1) | CN101942841A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493483A (en) * | 2011-12-10 | 2012-06-13 | 杨峥雄 | Printing coater foundation |
| CN106087944A (en) * | 2016-08-23 | 2016-11-09 | 福州市第三建筑工程公司 | A kind of earth construction being applied to soft soil foundation and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837514A (en) * | 2006-04-17 | 2006-09-27 | 陈星� | Column supported underground continuous wall |
| US20060260238A1 (en) * | 2002-11-18 | 2006-11-23 | SISTEMAS INDUSTRIALIZADOS BARCONS, S.L., Poligono Industrial Las Salinas de Levante | Refinement to the construction systems for structures in reinforced concrete or some other material of high-precision intergral modular forms |
| CN1958966A (en) * | 2006-07-20 | 2007-05-09 | 廖河山 | Underground consecutive sinking well type openweb wall body, and construction method |
-
2010
- 2010-10-14 CN CN 201010506328 patent/CN101942841A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060260238A1 (en) * | 2002-11-18 | 2006-11-23 | SISTEMAS INDUSTRIALIZADOS BARCONS, S.L., Poligono Industrial Las Salinas de Levante | Refinement to the construction systems for structures in reinforced concrete or some other material of high-precision intergral modular forms |
| CN1837514A (en) * | 2006-04-17 | 2006-09-27 | 陈星� | Column supported underground continuous wall |
| CN1958966A (en) * | 2006-07-20 | 2007-05-09 | 廖河山 | Underground consecutive sinking well type openweb wall body, and construction method |
Non-Patent Citations (1)
| Title |
|---|
| 《硅谷》 20101008 张胜明、晋良海 一种持力层免扰动的反梁式筏基的施工方法 138 1-3 , 第19期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493483A (en) * | 2011-12-10 | 2012-06-13 | 杨峥雄 | Printing coater foundation |
| CN106087944A (en) * | 2016-08-23 | 2016-11-09 | 福州市第三建筑工程公司 | A kind of earth construction being applied to soft soil foundation and construction method thereof |
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Open date: 20110112 |