CN109778858B - Method for foundation beam construction - Google Patents
Method for foundation beam construction Download PDFInfo
- Publication number
- CN109778858B CN109778858B CN201910086108.XA CN201910086108A CN109778858B CN 109778858 B CN109778858 B CN 109778858B CN 201910086108 A CN201910086108 A CN 201910086108A CN 109778858 B CN109778858 B CN 109778858B
- Authority
- CN
- China
- Prior art keywords
- template
- foundation
- construction
- layer
- support
- 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
Landscapes
- Foundations (AREA)
Abstract
The invention provides a method for foundation beam construction, which comprises the following steps: excavating a foundation trench: the excavation area of the foundation trench is increased so as to facilitate the short upright stanchion to support the template and remove the template and facilitate elevation leveling; foundation treatment: compacting the excavated foundation trench, excavating a soft soil layer at the position of uneven soil quality in the foundation trench to a preset thickness, and then filling the excavated soft soil layer by using a material with stable performance and no erosion as a cushion layer; and (3) support construction: selecting a short rod with the length of 1.2-1.5m as a vertical rod of the bracket; manufacturing a template: and (3) cutting the template according to a template splicing design drawing of the template, and splicing according to the template splicing drawing. The method utilizes the frame body and the template to well isolate the soil layer at the bottom of the groove from the poured concrete, the technology can overcome the influence of the site elevation on the construction, and has better effect on the construction in rainy season.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a method for foundation beam construction.
Background
At present, a cushion layer is a middle layer of a reinforced concrete foundation and foundation soil, has the functions of enabling the surface of the cushion layer to be flat and facilitating binding of reinforcing steel bars on the cushion layer, also has the function of protecting the foundation, is all plain concrete, and does not need to add the reinforcing steel bars. The construction generally requires that the thickness be 70mm or more and the strength grade be C10 or more.
The purpose of the foundation connecting beam with the cushion layer is as follows:
1. the cushion layer is leveled to make up the errors of earth excavation, so that the base plate is stressed on a plane, and the high-grade concrete of the foundation is not wasted.
2. The design pad layer typically extends 100mm beyond the base bottom edge. The construction paying-off and supporting foundation template can be conveniently constructed to make a protective layer for the foundation steel bars. The position of the reinforcing steel bar is convenient to control, and the bottom reinforcing steel bar and the soil are isolated and not polluted.
3. The bed course can keep apart the contact of concrete foundation beam and foundation soil, prevents to give concrete foundation beam just pour the back, and moisture just is absorbed by soil, influences the increase of concrete strength.
Design code of foundation of building foundation 5.1.9 in GB5007-2002 section 5, section 5: when frozen soil exists below the independent foundation connecting beam or pile foundation bearing platform, a gap corresponding to the frost heaving amount of the soil layer is reserved below the beam or the bearing platform so as to prevent the beam or the bearing platform from being cracked due to frost heaving of the soil.
A construction method of the foundation connecting beam can meet the construction purpose of adding the cushion layer and can leave a certain gap between the foundation connecting beam and the soil layer. Therefore, a plain concrete cushion layer under the connection beam bottom is not arranged in the construction of the foundation connection beam.
Disclosure of Invention
In view of the above, the invention provides a method for foundation beam construction, and aims to solve the problem that the existing foundation beam is low in construction efficiency.
In one aspect, the present invention provides a method for foundation beam construction, comprising: excavating a foundation trench: the excavation area of the foundation trench is increased so as to facilitate the short upright stanchion to support the template and remove the template and facilitate elevation leveling; foundation treatment: compacting the excavated foundation trench, excavating a soft soil layer at the position of uneven soil quality in the foundation trench to a preset thickness, and then filling the excavated soft soil layer by using a material with stable performance and no erosion as a cushion layer; and (3) support construction: selecting short rods with the length of 1.2-1.5m as vertical rods of the support, wherein the cross rods at the bottommost layer and the topmost layer are used as support bodies, the cross rods at the middle layer are used as support rods for manufacturing a beam template, and leveling is carried out on the beam by adjusting the level and elevation of the support rods at the middle layer; manufacturing a template: and (3) cutting the template according to a template splicing design drawing of the template, and splicing according to the template splicing drawing.
Furthermore, during foundation treatment, a drainage open trench is dug in the foundation trench, water is guided to the water collecting pit and is drained by a water pump, and the foundation trench is protected from water seepage and soaking.
Further, the performance-stable, non-aggressive materials include medium sand, coarse sand, gravel, crushed stone and lime soil.
Further, the process of setting up the support is as follows: laying foundation base plates at the bottom of a groove, erecting vertical rods, erecting a bottom small cross rod and a large cross rod, erecting a support cross rod, erecting an upper large cross rod, manufacturing a template, binding steel bars, erecting an upper small cross rod, pouring a concrete beam, and removing a frame body and the template at the end of maintenance.
Furthermore, when the cushion layer is constructed, the cushion layer is tamped, and the density of each layer of the cushion layer after being tamped meets the design standard.
Compared with the prior art, the construction method has the beneficial effects that the bottom soil layer and the poured concrete are well isolated by the frame body and the template, the influence of the site elevation on the construction can be overcome by the technology, the construction in rainy seasons is better, the cushion concrete curing period and the foundation beam bottom leveling process are saved, the construction progress is greatly accelerated, and the construction efficiency is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a method for constructing a foundation beam according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a method for foundation beam construction includes the steps of:
step one S101, excavating a foundation trench;
step two S102, foundation treatment;
step three S103, support construction;
and step S104, template manufacturing.
Specifically, in the step one S101, the excavation area of the foundation trench is increased so as to facilitate the short vertical rod to support the template, the template removal and the elevation leveling; in the second step S102, compacting the excavated foundation trench, excavating a soft soil layer at the position of uneven soil quality in the foundation trench to a preset thickness, and then filling the excavated soft soil layer by using a material with stable performance and no corrosivity as a cushion layer; in the third step S103, 1.2-1.5m short rods are selected as vertical rods of the support, wherein the cross rods of the lowest layer and the uppermost layer are used as frame bodies, the cross rods of the middle layer are support rods for manufacturing the beam template, and the beams are leveled by adjusting the level and elevation of the support rods of the middle layer; in step four S104, according to the template splicing design drawing, blanking and cutting are carried out on the template, and splicing is carried out according to the template splicing drawing.
Specifically, when the cushion layer is constructed, the layer is tamped, and the density of each layer of the cushion layer after being tamped meets the design standard.
Specifically, during foundation treatment, a drainage open trench is dug in the foundation trench, water is guided to the water collecting pit and drained by a water pump, and the foundation trench is protected from water seepage and soaking. The materials with stable performance and no erosion include medium sand, coarse sand, gravel, broken stone and lime soil.
Specifically, the scaffold erection process comprises the following steps: laying foundation base plates at the bottom of a groove, erecting vertical rods, erecting a bottom small cross rod and a large cross rod, erecting a support cross rod, erecting an upper large cross rod, manufacturing a template, binding steel bars, erecting an upper small cross rod, pouring a concrete beam, and removing a frame body and the template at the end of maintenance.
The construction method has the advantages that the bottom soil layer and the poured concrete are well isolated by the aid of the frame body and the template, the influence of site elevation on construction can be overcome, and the construction method has a good effect on construction in rainy seasons.
In the specific implementation, the short upright stanchion supporting template is utilized to construct the foundation connecting beam. The method comprises the following steps: (example of a basic tie beam size of 600 x 300mm is three types of soil)
Excavating a foundation trench: in order to conveniently support the template by the short vertical rod, remove the template and conveniently level and level, the original construction method of using the cushion layer is adopted, the height of the beam is 0.6m, then the cushion layer with the thickness of 0.1m is added, the excavation depth is 1.6 m, the excavation is carried out according to the most widened soil type, and the height-width ratio of the slope is 1: 0.75. through research, the original excavation depth is deepened to 0.3 m. And calculating to obtain the excavation sectional area of 0.65 opening more than the original excavation of the beam top elevation.
Foundation treatment: in order to prevent the foundation trench from the following aspects in the later concrete construction: 1) the bearing capacity and the stability are insufficient; 2) compressing and differential settlement; 3) water seepage problem. The construction personnel compact the excavated foundation trench after excavation, excavate a soft soil layer with a certain thickness below the uneven soil, and then pack the soft soil layer with medium sand, coarse sand, gravel, broken stone or pebble, lime soil and other materials with stable performance and no erosion. The cushion layer should be tamped layer by layer, and the density of each layer after tamping should reach the design standard. The drainage open ditches are excavated at proper positions, water is guided to the water collecting pit and drained by a water pump, and the inside of the foundation trench is protected from water seepage and soaking.
And (3) support construction: the vertical rods are selected, because the distance between the bottom of a constructed beam and the bottom of a groove is only 400mm, short rods of 1.2-1.5m which are generally used as small cross rods of a scaffold are selected as the vertical rods, the cross rods at the bottommost layer and the cross rods at the topmost layer are frame bodies, the support rods for supporting beam formworks are arranged at the middle layer, the beams can be leveled by adjusting the level and elevation of the support rods at the middle layer, and the support formworks are isolated from the foundation so as to prevent the beam concrete from being polluted by foundation soil layers.
The scaffold erection process is as follows: the method comprises the following steps of base foundation base plate laying, pole setting, bottom small cross rod large cross rod erection, support cross rod erection, upper large cross rod erection, template manufacturing, steel bar binding, upper small cross rod erection, concrete beam pouring and frame and template removal at the end of maintenance.
The frame body erection requirement is as follows:
1. each upright pole must be placed in the middle of the backing plate, and the area of the backing plate must not be less than 0.15 square meter.
2. In order to ensure the stability of the frame body, a support rod is added at a proper position if necessary.
3. The connecting points of the rod pieces are firmly connected by fasteners.
Manufacturing a template: and (4) cutting the template according to template splicing design data, and splicing according to the template splicing drawing paper. The method can be specifically referred to a template splicing design drawing during construction.
By the construction method, the scaffold and the template are recycled as turnover materials, and the construction method meets the requirements of green construction and energy-saving construction. The template assembling shape is convenient to control, the tightness is good, and the concrete pouring quality is kept. The technology does not need to pour a 70-100mm cushion layer, and is favorable for saving the construction cost. The bottom soil layer and the poured concrete are well isolated by the aid of the frame body and the template, the influence of site elevation on construction can be overcome by the aid of the technology, and the construction in rainy seasons is better. The construction saves the concrete curing period of the cushion and the leveling process of the bottom of the foundation beam groove, and is favorable for accelerating the construction progress.
Meanwhile, the method has the advantages of simple construction, easy operation, scientific and reasonable process, flexible use, low cost, great improvement of construction efficiency, good application prospect and social benefit.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A method for foundation beam construction, comprising:
excavating a foundation trench: the excavation area of the foundation trench is increased so as to facilitate the short upright stanchion to support the template and remove the template and facilitate elevation leveling;
foundation treatment: compacting the excavated foundation trench, excavating a soft soil layer at the position of uneven soil quality in the foundation trench to a preset thickness, and then adopting a material with stable performance and no corrosiveness as a cushion layer to fill the excavated soft soil layer;
and (3) support construction: selecting short rods with the length of 1.2-1.5m as vertical rods of the support, wherein the cross rods at the bottommost layer and the topmost layer are used as support bodies, the cross rods at the middle layer are used as support rods for manufacturing a beam template, and leveling is carried out on the beam by adjusting the level and elevation of the support rods at the middle layer;
manufacturing a template: and (3) cutting the template according to a template splicing design drawing of the template, and splicing according to the template splicing drawing.
2. The method for foundation beam construction according to claim 1, wherein a drainage open trench is dug in the foundation trench, and water is introduced into the sump and drained by a water pump to protect the foundation trench from water infiltration during foundation treatment.
3. The method for foundation beam construction as claimed in claim 1, wherein the performance-stable, non-aggressive material includes medium sand, coarse sand, gravel, crushed stone and lime soil.
4. The method for foundation beam construction according to claim 1, wherein the erection procedure of the scaffold is:
laying foundation base plates at the bottom of a groove, erecting vertical rods, erecting a bottom small cross rod and a large cross rod, erecting a support cross rod, erecting an upper large cross rod, manufacturing a template, binding steel bars, erecting an upper small cross rod, pouring a concrete beam, and removing a frame body and the template at the end of maintenance.
5. The method for foundation beam construction as claimed in claim 1, wherein the bedding is compacted in layers at the time of construction of the bedding, and the compacted density of each layer of the bedding satisfies the design criteria.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910086108.XA CN109778858B (en) | 2019-01-29 | 2019-01-29 | Method for foundation beam construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910086108.XA CN109778858B (en) | 2019-01-29 | 2019-01-29 | Method for foundation beam construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109778858A CN109778858A (en) | 2019-05-21 |
| CN109778858B true CN109778858B (en) | 2021-03-02 |
Family
ID=66503407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910086108.XA Active CN109778858B (en) | 2019-01-29 | 2019-01-29 | Method for foundation beam construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109778858B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2478756C1 (en) * | 2011-07-25 | 2013-04-10 | Федеральное государственное образовательное учреждение высшего профессионального образования "Кубанский государственный аграрный университет" | Base for linear group of reservoirs |
| CN204662480U (en) * | 2015-04-22 | 2015-09-23 | 中国建筑第六工程局有限公司 | The permanent embed-type elastic bottom template structure of a kind of grade beam |
| CN207959249U (en) * | 2018-02-09 | 2018-10-12 | 中交二航局第四工程有限公司 | Cushion cap and its foundation pit cushion construction structure |
-
2019
- 2019-01-29 CN CN201910086108.XA patent/CN109778858B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109778858A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109797769B (en) | Collapsible loess area underground comprehensive pipe gallery foundation structure and construction method thereof | |
| CN107447778A (en) | The heightening and consolidation structure and method of a kind of in-service reinforced concrete retaining wall | |
| CN214993554U (en) | Hydraulic engineering's side slope reinforced structure | |
| CN207331740U (en) | A kind of heightening and consolidation structure of in-service reinforced concrete retaining wall | |
| CN108035379B (en) | Comprehensive pipe gallery and construction method thereof | |
| CN109056804B (en) | Comprehensive pipe rack foundation pit supporting structure and implementation method thereof | |
| CN109778858B (en) | Method for foundation beam construction | |
| CN114809521B (en) | Separated structural terrace and construction method thereof | |
| CN216688857U (en) | Side width structure of existing line embankment | |
| US20110110717A1 (en) | Structure for Supporting Vehicular Traffic | |
| CN111021378A (en) | Highway subgrade slope broken line type anchoring pile retaining structure and construction method thereof | |
| CN207211176U (en) | A kind of big open caisson of superelevation | |
| CN110172988A (en) | A kind of piling formula composite concrete placement ground and its construction method | |
| CN113957874B (en) | Construction method for constructing road on soft soil foundation | |
| CN105113350A (en) | Pier abutment roadbed structure and construction method | |
| CN113897905A (en) | Anti-freezing embedded type near-water retaining wall structure and construction method | |
| CN110106930B (en) | Iron tower foundation reinforcement protection method | |
| CN209816896U (en) | Collapsible loess area utility tunnel foundation structure | |
| CN111472359A (en) | Method for replacing and filling peat soil soft foundation box culvert foundation | |
| RU2249082C1 (en) | Method for erecting shallow and surface foundations in thawed ground located above underlying permafrost or rock grounds | |
| CN218148385U (en) | Precast concrete foundation ditch bank protection | |
| CN220520990U (en) | Deep miscellaneous soil roadbed supporting structure that fills | |
| CN214143087U (en) | Road edge line soft soil replacement and filling treatment structure | |
| CN217419719U (en) | Anti-settlement foundation structure and building system | |
| CN218969969U (en) | Backfill soil composite foundation structure |
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 |