CN110080264B - Method for locally reinforcing strip-shaped foundation - Google Patents
Method for locally reinforcing strip-shaped foundation Download PDFInfo
- Publication number
- CN110080264B CN110080264B CN201910366930.1A CN201910366930A CN110080264B CN 110080264 B CN110080264 B CN 110080264B CN 201910366930 A CN201910366930 A CN 201910366930A CN 110080264 B CN110080264 B CN 110080264B
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- Prior art keywords
- strip
- foundation
- shaped foundation
- reserved hole
- cuboid
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims abstract description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 description 11
- 239000002689 soil Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
- E02D27/08—Reinforcements for flat foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
Abstract
The invention provides a method for locally reinforcing a strip-shaped foundation, which comprises a pipe trench and a wall body, wherein the pipe trench penetrates through the wall body, a reserved hole capable of enabling the pipe trench to pass through is formed in the wall body, the elevation of the bottom of the reserved hole is lower than that of an original strip-shaped foundation, the original strip-shaped foundation is locally deepened to the position below the reserved hole to form a new strip-shaped foundation, and different supporting structures are respectively used for reinforcing the space between the original strip-shaped foundation and the new strip-shaped foundation at two sides of the reserved hole according to different local deepening heights H, and the supporting structures are supporting columns or variable-section supporting columns or door frame columns. The invention adopts corresponding reinforcement modes according to different local deepening heights so as to ensure that the characteristics of uniform and stable stress of the foundation can be maintained when the strip foundation passes through the pipe trench, and good support is provided for the upper house structure.
Description
Technical Field
The invention belongs to the technical field of strip foundations of house walls, and particularly relates to a method for locally reinforcing a strip foundation.
Background
In collapsible loess areas or other similar areas, foundation soil falls down when meeting water, so that bearing capacity is reduced, and if water points are available in houses in the areas, water pipelines are needed to be placed in buried ditches. As shown in fig. 1 and 2, when the trench needs to penetrate through the wall body, the trench is buried deeper than the strip-shaped foundation at the lower part of the wall body, the original strip-shaped foundation is generally bypassed from the trench. As shown in fig. 3, it is conventional practice to step down the table at a prescribed gradient in the region of both sides of the pipe trench until the passage of the foundation from the lower portion of the pipe trench is satisfied, so as to ensure the continuity of the foundation. The method has the defects that the design expression is complex, and the omission of the design content of the drawing is easy to cause; the construction can increase the working procedures, influence the construction progress, and in the foundation section area without enough bench length, the uniformity of foundation stress is not guaranteed, and the use safety of the upper structure is influenced to a certain extent, so a new construction method is needed to solve the existing problems.
Disclosure of Invention
The invention aims at the defects of the existing local deepening technology of the strip foundation of the house, and designs the strip foundation structure which reduces the construction range and adopts the corresponding construction technology according to different deepening heights of the foundation so as to ensure that the strip foundation can keep the uniform and stable stress characteristic of the foundation when passing through a pipe ditch and provide good support for an upper house structure.
The aim of the invention is achieved by the following technical scheme:
the utility model provides a method of bar basis local reinforcement, includes trench, wall body, the trench passes the wall body to form a reserved hole that can make the trench pass through at the wall body, the hole bottom elevation of reserved hole is less than former bar basis elevation, former bar basis is deepened to the below of reserved hole bottom locally and is formed new bar basis, and uses different bearing structure to consolidate between former bar basis and the new bar basis respectively in the both sides of reserved hole according to local deepening difference of height H, bearing structure is a retaining post or variable cross section retaining post or door frame post.
The retaining column consists of two cuboids, and the retaining column is adopted between the original strip-shaped foundation and the new strip-shaped foundation for reinforcement when the local deepening height H is more than or equal to 500mm and less than or equal to 1000 mm; the two cuboids are respectively arranged on two sides of the reserved hole and are respectively and vertically connected with the original strip-shaped foundation and the new strip-shaped foundation, the top surfaces of the supporting columns are flush with the top surface of the original strip-shaped foundation, and the top surface of the reserved hole is provided with a lintel.
The cuboid is formed by pouring reinforced concrete.
The column height = local deepening height H of the cuboid, and the section size of the cuboid is 250mmX the width of the original strip foundation.
The variable cross-section retaining column consists of two inverted trapezoidal columns, and is adopted to reinforce between an original strip foundation and a new strip foundation when the local deepening height H is smaller than or equal to 1000 mm; the two inverted trapezoidal columns are respectively arranged on two sides of the reserved hole and are respectively and vertically connected with the original strip-shaped foundation and the new strip-shaped foundation, the top surfaces of the variable-section retaining columns are flush with the top surface of the original strip-shaped foundation, and the top surface of the reserved hole is provided with a lintel.
The inverted trapezoid column body is formed by pouring reinforced concrete.
The height=local deepening height H of the inverted trapezoid column, and the cross section size of the inverted trapezoid column is 350-250 mmX the width of the original strip foundation.
The door frame column is formed by encircling three sides of five cuboids, wherein the top of the reserved hole is provided with one cuboid, and two cuboids are respectively arranged on two sides of the reserved hole; and when the local deepening height H is more than 1500mm, reinforcing by adopting a door frame column between the original strip-shaped foundation and the new strip-shaped foundation.
And the door frame column and the new strip-shaped foundation are enclosed to form a rectangle.
The length of the cuboid at the top of the reserved hole = reserved hole length +250mmX2, the cross-sectional dimension of the reserved hole is 200-400 mmX wall thickness, the cuboids at the two sides of the reserved hole consist of an upper half cuboid and a lower half cuboid, the height of the lower half cuboid = local deepening height H, and the cross-sectional dimension of the lower half cuboid is the width of the original strip-shaped foundation with the side dimension of 350-250 mmX; the upper half part is Fang Tigao degrees to the distance from the top of the lower part cuboid to the top of the door frame column, and the section size of the upper half part cuboid is 250mmX wall thickness.
The invention has the beneficial effects that:
according to the method, when the strip foundation of the house building is wound downwards from the bottom of the pipe ditch, the problems of construction measures in the design and actual construction processes are solved by using the supporting and retaining concept, and the method for meeting the pipe ditch on the strip foundation has the advantages of simplifying the design, facilitating the construction, shortening the construction period and having certain economic and social benefits.
Drawings
FIG. 1 is a plan view of a trench traversing a wall;
FIG. 2 is a transverse cross-sectional view of a trench through a wall;
FIG. 3 is a partially deepened longitudinal cross-sectional view of a stepped strip foundation;
FIG. 4 is a longitudinal cross-sectional view of a partially deepened reinforcing structure of a strip foundation;
FIG. 5 is a second longitudinal cross-sectional view of a partially deepened reinforcement structure of a strip foundation;
fig. 6 is a longitudinal cross-sectional view of a partially deepened reinforcing structure for a strip foundation.
Reference numerals illustrate:
1-pipe ditches, 2-reserved holes, 3-walls, 4-original strip foundations, 5-new strip foundations, 6-lintels, 7-retaining columns, 8-variable cross-section retaining columns and 9-door frame columns;
b-thickness of wall body, H-strip foundation local deepening height.
The specific embodiment is as follows:
example 1
As shown in fig. 4, the invention provides a method for locally reinforcing a strip-shaped foundation, which comprises a pipe ditch 1 and a wall body 3, wherein the pipe ditch 1 penetrates through the wall body 3, a reserved hole 2 capable of enabling the pipe ditch 1 to pass through is formed in the wall body 3, when the hole bottom elevation of the reserved hole 2 is lower than the burial depth of an original strip-shaped foundation 4 under a wall, the original strip-shaped foundation 4 needs to be locally deepened to bypass from the bottom of the reserved hole 2, and the original strip-shaped foundation is reinforced at two sides of the hole opening of the reserved hole 2 so as to ensure the continuity and stability of stress of the original strip-shaped foundation. Therefore, the invention forms a new strip foundation 5 by locally deepening the original strip foundation 4 downwards below the reserved hole 2, and respectively uses different supporting structures to strengthen the space between the original strip foundation 4 and the new strip foundation 5 at two sides of the reserved hole 2 according to different local deepening heights H, wherein the supporting structures are supporting columns 7 or variable-section supporting columns 8 or door frame columns 9.
The retaining post 7 consists of two cuboids which are respectively arranged at two sides of the reserved hole 2, and when the local deepening height H of the strip foundation is less than or equal to 1000mm and is 500 mm;
the variable cross section retaining column 8 consists of two inverted trapezoids, the cross section of the column is an inverted trapezoid, and the column is a column body with the size changing along with the increase of the height, and is used for reserving two sides of the hole 2, and when the local deepening height H of the strip foundation is less than or equal to 1500mm and is 1000 mm;
the door frame column 9 is formed by encircling five cuboid three sides and is used for reserving the top and two sides of the hole 2, and when the local deepening height H of the strip-shaped foundation is more than 1500 mm.
The invention adopts corresponding construction technology according to different local deepening heights of the strip foundation so as to ensure that the uniform and stable stress of the foundation can be maintained when the strip foundation passes through the pipe trench, and good support is provided for the upper house structure.
Example 2
On the basis of the embodiment 1, as shown in fig. 4, the number of the retaining columns 7 is two cuboid which are cast by reinforced concrete, and the retaining columns are adopted when the local deepening height H of the strip-shaped foundation is less than or equal to 1000mm and is less than or equal to 500 mm; the height=local deepening height H of the cuboid, the cross-sectional dimension of which is 250mmX the width of the strip-shaped base.
The two cuboids are respectively arranged on two sides of the reserved hole 2 and are respectively and vertically connected with the original strip-shaped foundation 4 and the new strip-shaped foundation 5, the top surface of the supporting column 7 is flush with the top surface of the original strip-shaped foundation 4, and the top surface of the reserved hole 2 is provided with a lintel 6. The supporting columns 7 are used for connecting foundations at the high position and the low position, foundation soil at the outer side of the reserved hole is blocked, the strength of the reinforced strip foundation is weakened due to height difference, and the uniformity of stress of the strip foundation is guaranteed.
Example 3
On the basis of the embodiment 1, as shown in fig. 5, the variable cross-section retaining columns 8 are two inverted trapezoid columns which are formed by pouring reinforced concrete, and the variable cross-section retaining columns 8 are adopted between the original strip-shaped foundation 4 and the new strip-shaped foundation 5 for reinforcement when the local deepening height H of 1000mm is less than or equal to 1500 mm; the two inverted trapezoidal columns are respectively arranged on two sides of the reserved hole 2 and are respectively and vertically connected with the original strip-shaped foundation 4 and the new strip-shaped foundation 5, the top surface of the variable cross-section retaining column 8 is flush with the top surface of the original strip-shaped foundation 4, and the top surface of the reserved hole 2 is provided with a lintel 6.
The height=strip foundation local deepening height H of the variable cross-section retaining post 8, the cross-section size is (350-250) mmX strip foundation width, the cross-section size is adjusted according to the increase of the strip foundation local deepening height, the stress characteristics of the foundation are met, the variable cross-section retaining post is used for connecting the foundation at the high and low positions, foundation soil outside a reserved hole is blocked, the variable cross-section retaining post reinforces the strength weakening of the strip foundation due to the height difference, and the uniformity of the stress of the strip foundation is ensured.
Example 4
On the basis of the embodiment 1, as shown in fig. 6, the door frame column 9 is formed by surrounding five cuboid three sides, and when the local deepening height H is more than 1500mm, the door frame column 9 is adopted between the original strip-shaped foundation 4 and the new strip-shaped foundation 5 for reinforcement; the top of the reserved hole 2 is provided with a cuboid, and two sides of the reserved hole 2 are respectively provided with two cuboids; the cuboid arranged at the top of the reserved hole 2 is used for replacing the lintel 6 on the reserved hole 2. The door frame column 9 and the new strip-shaped foundation 5 are enclosed to form a rectangle.
The length of the cuboid at the top of the reserved hole 2=the reserved hole length+250 mmX2, the cross-sectional dimension of the reserved hole is 200-400 mmXwall thickness b, the cuboids at the two sides of the reserved hole 2 consist of an upper half cuboid and a lower half cuboid, the height of the lower half cuboid=the local deepening height H, the cross-sectional dimension of the lower half cuboid is the width of an original strip-shaped foundation 4 with the edge dimension of 350-250 mmXand the strip-shaped foundation is used for connecting the two high and low positions, and foundation soil at the outer side of the reserved hole is blocked; the upper half Fang Tigao degrees is the distance from the top of the lower part cuboid to the top of the door frame column 9, and the cross section dimension of the upper part cuboid is 250mmX wall thickness b, which is used for reinforcing the wall.
According to the invention, when the strip foundation of the existing house building collides with a pipe ditch, the strip foundation is reinforced by adopting different structural measures in a targeted manner according to the different local deepening heights of the strip foundation, so that the strip foundation is stressed continuously and uniformly, and the stability of the structure is ensured; the invention simplifies the design, is convenient for construction and saves investment.
Claims (3)
1. The utility model provides a method of bar basis local reinforcement, includes trench (1), wall body (3), trench (1) passes wall body (3) to form one and make reserved hole (2) that trench (1) passed through at wall body (3), the hole bottom elevation of reserved hole (2) is less than former bar basis (4) elevation, its characterized in that: the original strip-shaped foundation (4) is locally deepened downwards until a new strip-shaped foundation (5) is formed below the hole bottom of the reserved hole (2), and different supporting structures are respectively used for reinforcing the space between the original strip-shaped foundation (4) and the new strip-shaped foundation (5) at two sides of the reserved hole (2) according to different local deepening heights H, wherein the supporting structures are supporting columns (7) or variable-section supporting columns (8) or door frame columns (9);
the retaining column (7) consists of two cuboids, and the retaining column (7) is adopted between the original strip-shaped foundation (4) and the new strip-shaped foundation (5) for reinforcement when the local deepening height H of 500mm is less than or equal to 1000 mm; the two cuboids are respectively arranged at two sides of the reserved hole (2) and are respectively and vertically connected with the original strip-shaped foundation (4) and the new strip-shaped foundation (5), the top surfaces of the supporting columns (7) are level with the top surface of the original strip-shaped foundation (4), and the top surface of the reserved hole (2) is provided with a lintel (6); the column height of the cuboid=local deepening height H, and the section size of the cuboid is 250mmX the width of the original strip-shaped foundation (4);
the variable cross-section retaining column (8) consists of two inverted trapezoidal columns, and the variable cross-section retaining column (8) is adopted between the original strip-shaped foundation (4) and the new strip-shaped foundation (5) for reinforcement when the local deepening height H of 1000mm is less than or equal to 1500 mm; the two inverted trapezoidal columns are respectively arranged on two sides of the reserved hole (2) and are respectively and vertically connected with the original strip-shaped foundation (4) and the new strip-shaped foundation (5), the top surfaces of the variable cross-section retaining columns (8) are flush with the top surface of the original strip-shaped foundation (4), and the lintel (6) is erected on the top surface of the reserved hole (2); the height of the inverted trapezoid column = local deepening height H, and the cross section size of the inverted trapezoid column is (350-250) width of the mmX original strip foundation (4);
the door frame column (9) is formed by encircling five cuboid three sides, wherein the top of the reserved hole (2) is provided with a cuboid, and two sides of the reserved hole (2) are respectively provided with two cuboids; when the local deepening height H is more than 1500mm, reinforcing is carried out between the original strip-shaped foundation (4) and the new strip-shaped foundation (5) by adopting a door frame column (9); the door frame column (9) and the new strip-shaped foundation (5) are enclosed to form a rectangle;
the length of the cuboid at the top of the reserved hole (2) = (reserved hole length+250 mmX2), the cross section size of the reserved hole is (200-400 mm) the thickness of the X wall body (3), the cuboids at the two sides of the reserved hole (2) consist of an upper half cuboid and a lower half cuboid, the height of the lower half cuboid = local deepening height H, and the cross section size of the lower half cuboid is the width of the X original strip foundation (4) with the side size (350-250 mm); the upper half part is Fang Tigao degrees, which is the distance from the top of the lower part cuboid to the top of the door frame column (9), and the section size of the upper half part cuboid is 250mmX the thickness of the wall body (3).
2. A method of localized reinforcement of a strip foundation according to claim 1, wherein: the cuboid is formed by pouring reinforced concrete.
3. A method of localized reinforcement of a strip foundation according to claim 1, wherein: the inverted trapezoid column body is formed by pouring reinforced concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910366930.1A CN110080264B (en) | 2019-05-05 | 2019-05-05 | Method for locally reinforcing strip-shaped foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910366930.1A CN110080264B (en) | 2019-05-05 | 2019-05-05 | Method for locally reinforcing strip-shaped foundation |
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| CN110080264A CN110080264A (en) | 2019-08-02 |
| CN110080264B true CN110080264B (en) | 2024-03-15 |
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| CN201910366930.1A Active CN110080264B (en) | 2019-05-05 | 2019-05-05 | Method for locally reinforcing strip-shaped foundation |
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| CN112502208A (en) * | 2020-12-31 | 2021-03-16 | 中国电建集团河南省电力勘测设计院有限公司 | Settlement-adjustable shunting machine foundation and adjusting method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2032024C1 (en) * | 1992-07-17 | 1995-03-27 | Пермский государственный технический университет | Method for reinforcing the footing of strip foundation during reconstruction of building or structure |
| RU2130996C1 (en) * | 1997-07-24 | 1999-05-27 | Государственный научно-исследовательский, проектно-конструкторский и технологический институт бетона и железобетона | Method of reinforcement of strip foundation |
| RU2003122794A (en) * | 2003-07-21 | 2005-02-10 | Научно-исследовательское и экспериментально-проектное республиканское унитарное предпри тие "Институт БелНИИС" Министерства архитектуры и строительства Республики Беларусь (BY) | RECONSTRUCTED MULTI-STOREY BUILDING |
| CN101250886A (en) * | 2008-04-09 | 2008-08-27 | 武汉大学 | Method for reinforcing masonry structure building base |
-
2019
- 2019-05-05 CN CN201910366930.1A patent/CN110080264B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2032024C1 (en) * | 1992-07-17 | 1995-03-27 | Пермский государственный технический университет | Method for reinforcing the footing of strip foundation during reconstruction of building or structure |
| RU2130996C1 (en) * | 1997-07-24 | 1999-05-27 | Государственный научно-исследовательский, проектно-конструкторский и технологический институт бетона и железобетона | Method of reinforcement of strip foundation |
| RU2003122794A (en) * | 2003-07-21 | 2005-02-10 | Научно-исследовательское и экспериментально-проектное республиканское унитарное предпри тие "Институт БелНИИС" Министерства архитектуры и строительства Республики Беларусь (BY) | RECONSTRUCTED MULTI-STOREY BUILDING |
| CN101250886A (en) * | 2008-04-09 | 2008-08-27 | 武汉大学 | Method for reinforcing masonry structure building base |
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Effective date of registration: 20201029 Address after: 710018 Shaanxi province Xi'an Weiyang road Fengcheng four Changqing building Applicant after: XI'AN CHANGQING TECHNOLOGY ENGINEERING Co.,Ltd. Applicant after: CHINA NATIONAL PETROLEUM Corp. Address before: 710018 Shaanxi province Xi'an Weiyang road Fengcheng four Changqing building B201 Applicant before: XI'AN CHANGQING TECHNOLOGY ENGINEERING Co.,Ltd. |
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