CN109083128B - Profile steel upright assembled underground continuous wall with high bearing capacity - Google Patents
Profile steel upright assembled underground continuous wall with high bearing capacity Download PDFInfo
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- CN109083128B CN109083128B CN201811052473.0A CN201811052473A CN109083128B CN 109083128 B CN109083128 B CN 109083128B CN 201811052473 A CN201811052473 A CN 201811052473A CN 109083128 B CN109083128 B CN 109083128B
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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
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Abstract
The invention discloses a profile steel upright post assembled underground continuous wall with high bearing capacity, and aims to provide a profile steel upright post assembled underground continuous wall with high bearing capacity, which can effectively shorten the construction period of foundation pit enclosure, reduce the occupied space of the foundation pit enclosure and improve the bearing capacity of a wall body of the assembled underground continuous wall under the condition of ensuring the soil retaining capacity and the water stopping capacity of the foundation pit enclosure. It comprises an underground cement-soil continuous wall; and the assembly type wall body component is inserted into the underground cement continuous wall and comprises a plurality of vertical reinforced concrete prefabricated parts which are sequentially arranged and distributed along the length direction of the underground cement continuous wall and profile steel stand columns which are arranged at the lower ends of the vertical reinforced concrete prefabricated parts in a one-to-one correspondence manner, wherein the profile steel stand columns are provided with air bag bottom expanding devices, and each air bag bottom expanding device comprises a bottom expanding support plate, a stop limiting plate, an air bag and a grouting pipeline.
Description
Technical Field
The invention relates to an underground diaphragm wall, in particular to a section steel upright post assembled underground diaphragm wall with high bearing capacity.
Background
The foundation pit construction of a building or a structure generally comprises the steps of firstly constructing the enclosure of the foundation pit and then excavating the foundation pit. The types of foundation pit enclosure structures are more, and the following two foundation pit enclosure forms are generally adopted: firstly, soil is retained by a drilled pile, an underground cement-soil continuous wall is constructed on the outer side of the drilled pile, and the underground cement-soil continuous wall blocks underground water to form a foundation pit enclosure (such as a canal type cutting cement-soil wall); and secondly, earth is retained by the reinforced concrete underground continuous wall, and underground water is blocked by the underground cement continuous wall constructed on the outer side to form a foundation pit enclosure. Above two kinds of foundation ditch enclosure forms commonly used all need to be under construction two kinds of stake, and the rigidity stake that is located the inboard is used for retaining soil, and the groundwater earth continuous wall that is located the outside is used for stagnant water, owing to have two rows of stakes, not only construction cycle extension when envelope construction, the space occupies great moreover.
Disclosure of Invention
The invention aims to provide the section steel upright post assembled underground continuous wall with high bearing capacity, which can effectively shorten the construction period of the foundation pit enclosure and reduce the occupied space of the foundation pit enclosure under the condition of ensuring the soil retaining capacity and the water stopping capacity of the foundation pit enclosure.
The invention also aims to provide the section steel upright post fabricated underground continuous wall with high bearing capacity, which can improve the bearing capacity of the wall body of the fabricated underground continuous wall so as to adapt to the enclosure requirement of a deeper foundation pit.
The technical scheme of the invention is as follows:
a section steel upright assembled underground continuous wall with high bearing capacity comprises: the underground cement soil continuous wall is used for blocking underground water to form a foundation pit enclosure; and an assembled wall component inserted in the underground cemented soil continuous wall, wherein the assembled wall component comprises a plurality of vertical reinforced concrete prefabricated parts which are sequentially arranged and distributed along the length direction of the underground cemented soil continuous wall and profile steel upright columns which are arranged at the lower ends of the vertical reinforced concrete prefabricated parts in a one-to-one correspondence manner, the vertical reinforced concrete prefabricated parts are provided with prefabricated through holes which penetrate through the upper end surface and the lower end surface of the vertical reinforced concrete prefabricated parts, the profile steel upright columns are provided with air bag bottom expanding devices, each air bag bottom expanding device comprises a bottom expanding support plate, a stop limit plate, an air bag and a grouting pipeline, the upper parts of the bottom expanding support plates are rotatably arranged at the lower parts of the profile steel upright columns through horizontal shaft rods, the stop limit plates are arranged at the lower parts of the profile steel upright columns, the stop limit plates, the air bag sets up on the shaped steel stand, and the air bag is located and expands between end support plate and the shaped steel stand, the lower extreme of slip casting pipeline and the inner chamber intercommunication of air bag, the upper end of slip casting pipeline up extends and passes the prefabricated through-hole of the assembled wall body component that corresponds.
The assembled wall body component is inserted into the underground water-soil continuous wall of the profile steel stand assembled underground continuous wall with high bearing capacity, so that the strength of the channel type cutting assembled underground continuous wall can be ensured, when a foundation pit is excavated, the soil retaining capacity and the water stopping capacity of foundation pit enclosure can be ensured only by constructing one channel type cutting assembled underground continuous wall, the safe excavation of the foundation pit is realized, the construction period of the foundation pit enclosure is effectively shortened, and the occupied space of the foundation pit enclosure is reduced. Meanwhile, the assembly type wall body component is composed of a plurality of vertical reinforced concrete prefabricated parts, and two adjacent vertical reinforced concrete prefabricated parts are connected through the tenon-and-mortise structure.
And because the lower extreme of vertical reinforced concrete prefab is provided with the shaped steel stand, the lower part that forms assembled wall body component is the shaped steel stand, has alleviateed the holistic weight of assembled underground continuous wall and has reduced the operating cost.
On the other hand, because the lower part of shaped steel stand is equipped with the gasbag and expands the end device, after vertical reinforced concrete prefab inserts in the underground cement soil continuous wall, can inject cement thick liquid into the gasbag through the slip casting pipeline, make the gasbag inflation, gasbag inflation in-process will promote the end support plate that expands and up rotate around horizontal axostylus axostyle, until the end support plate that expands supports on the backstop limiting plate, after the end support plate that expands supports on the backstop limiting plate, the end support plate that expands roughly is 90 degrees angles with the shaped steel stand, thereby very big increase the bearing capacity of shaped steel stand lower part, make its bearing capacity that improves the wall body of assembled underground continuous wall, in order to adapt to the enclosure demand of deeper foundation ditch, so can increase the construction depth of assembled underground continuous wall, make assembled underground continuous wall can adapt to the enclosure effect of deeper foundation ditch.
Preferably, the section steel stand is H-shaped steel, the horizontal shaft rod, the bottom expanding support plate and the stop limit plate are located between two flange plates of the H-shaped steel, and the airbag is located between a web plate of the H-shaped steel and the bottom expanding support plate.
Preferably, the air bag bottom expanding device further comprises a lower baffle, the lower baffle is located below the bottom expanding support plate and located between two flange plates of the H-shaped steel, and the lower baffle is connected with the web plate and the flange plates of the H-shaped steel.
Preferably, the upper surface of the lower baffle plate is further provided with an elastic baffle plate, and the lower edge of the bottom expanding support plate is located between the elastic baffle plate and the web plate of the H-shaped steel.
Preferably, the grouting pipe is positioned between the two flange plates of the H-shaped steel.
Preferably, two adjacent vertical reinforced concrete prefabricated members are connected through a mortise and tenon structure.
Preferably, the tenon-and-mortise structure comprises a vertical mortise arranged on the side surface of one vertical reinforced concrete prefabricated member and a vertical tenon arranged on the side surface of the other vertical reinforced concrete prefabricated member and matched with the vertical mortise, the upper end of the vertical mortise is communicated with the upper end surface of the vertical reinforced concrete prefabricated member, the lower end of the vertical mortise is communicated with the lower end surface of the vertical reinforced concrete prefabricated member, and the vertical tenon is matched with the corresponding vertical mortise.
Preferably, in the same vertical reinforced concrete prefabricated member: the vertical mortise is arranged on one side face of the vertical reinforced concrete prefabricated part, the vertical tenon is arranged on the other side face of the vertical reinforced concrete prefabricated part, and the vertical mortise and the vertical tenon are positioned on two opposite sides of the vertical reinforced concrete prefabricated part.
Preferably, the grouting pipe is a plastic pipe or a metal pipe.
The invention has the beneficial effects that:
firstly, the construction period of the foundation pit enclosure can be effectively shortened and the occupied space of the foundation pit enclosure can be reduced under the condition of ensuring the soil retaining capability and the water stopping capability of the foundation pit enclosure.
And secondly, the bearing capacity of the wall body of the assembled underground continuous wall can be improved so as to adapt to the enclosure requirement of a deeper foundation pit.
Drawings
Fig. 1 is a plan view of the sectional steel upright assembled underground diaphragm wall with high bearing capacity of the present invention.
Fig. 2 is a side view of the assembled wall member of the present invention.
Fig. 3 is a top view of the vertical reinforced concrete preform of the present invention.
Fig. 4 is a partially enlarged view of a portion a in fig. 2.
In the figure:
an underground cement-soil continuous wall 1;
an assembled wall member 2;
a vertical reinforced concrete prefabricated part 3, a prefabricated through hole 3.1;
the structure of the tenon and mortise comprises a tenon and mortise structure 4, a vertical mortise 4.0 and a vertical tenon 4.1;
the steel structure comprises a section steel upright post 5, flange plates 5.1 and web plates 5.2;
the device comprises an air bag bottom expanding device 6, a stop limit plate 6.1, a horizontal shaft lever 6.2, a bottom expanding support plate 6.3, an air bag 6.4, an elastic baffle 6.5, a lower baffle 6.6 and a grouting pipeline 6.7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections, either mechanical or electrical, or communicating with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and 2, the section steel upright assembled underground continuous wall with high bearing capacity comprises an underground cemented soil continuous wall 1, wherein the underground cemented soil continuous wall is used for blocking underground water to form a foundation pit enclosure; and an assembly type wall member 2 inserted in the underground cemented soil continuous wall.
The assembly type wall body component comprises a plurality of vertical reinforced concrete prefabricated parts 3 which are sequentially arranged and distributed along the length direction of the underground cement continuous wall and profile steel upright posts 5 which are arranged at the lower ends of the vertical reinforced concrete prefabricated parts in a one-to-one correspondence mode.
The vertical reinforced concrete prefabricated member comprises a vertical concrete column and a reinforcement cage skeleton embedded in the vertical concrete column. The vertical reinforced concrete prefabricated member is provided with prefabricated through holes 3.1 which penetrate through the upper end surface and the lower end surface of the vertical reinforced concrete prefabricated member.
As shown in figure 3, two adjacent vertical reinforced concrete prefabricated members are connected through a mortise and tenon structure 4. The tenon-and-mortise structure comprises a vertical mortise 4.0 arranged on the side surface of one vertical reinforced concrete prefabricated member and a vertical tenon 4.1 arranged on the side surface of the other vertical reinforced concrete prefabricated member and matched with the vertical mortise, the upper end of the vertical mortise is communicated with the upper end surface of the vertical reinforced concrete prefabricated member, the lower end of the vertical mortise is communicated with the lower end surface of the vertical reinforced concrete prefabricated member, and the vertical tenon is matched with the corresponding vertical mortise.
The cross section of the vertical tenon is in a dovetail shape or a trapezoid shape or a T shape or a semicircular shape or a circular shape or an oval shape, and the cross section of the vertical tenon in the embodiment is in the dovetail shape. The cross section of the vertical mortise corresponds to that of the vertical tenon.
In the same vertical reinforced concrete prefabricated member: the vertical mortise is arranged on one side face of the vertical reinforced concrete prefabricated part, the vertical tenon is arranged on the other side face of the vertical reinforced concrete prefabricated part, and the vertical mortise and the vertical tenon are positioned on two opposite sides of the vertical reinforced concrete prefabricated part.
The shaped steel stand in this embodiment is H shaped steel. The upper end of the section steel upright post is connected with a reinforcement cage framework in the vertical reinforced concrete prefabricated part by welding.
As shown in fig. 2 and 4, the steel upright is provided with an airbag bellout device 6. Be equipped with two gasbag bellout devices on same shaped steel stand in this embodiment, and two gasbag bellout devices are located the relative both sides of the web of H shaped steel.
The air bag bottom expanding device comprises a bottom expanding support plate 6.3, a stop limit plate 6.1, a lower baffle plate 6.6, an air bag 6.4 and a grouting pipeline 6.7.
The upper portion of the bottom expanding support plate is rotatably arranged on the lower portion of the section steel stand column through a horizontal shaft rod 6.2, and the bottom expanding support plate is vertically hung on the lower portion of the section steel stand column through the horizontal shaft rod. Backstop limiting plate 6.1 sets up in shaped steel stand lower part, and backstop limiting plate level sets up, and the backstop limiting plate is located horizontal axostylus axostyle top and is used for spacing bellout backup pad around horizontal axostylus axostyle pivoted turned angle. The lower baffle is positioned below the bottom expanding support plate. The air bag is arranged on the section steel upright post and is positioned between the bottom expanding support plate and the section steel upright post.
In the same air bag bottom expanding device of the embodiment, the horizontal shaft rod, the bottom expanding support plate, the lower baffle and the stop limit plate are all positioned between two flange plates 5.1 of the H-shaped steel.
The lower baffle plate is connected with the web plate and the flange plate of the H-shaped steel through welding. The upper surface of the lower baffle is also provided with an elastic baffle 6.5. The lower edge of the bottom expanding support plate is positioned between the elastic baffle sheet and the web 5.2 of the H-shaped steel.
The air bag is positioned between the web plate of the H-shaped steel and the bottom-expanding support plate. The air bag is arranged on the web plate of the H-shaped steel.
The lower end of the grouting pipeline 6.7 is communicated with the inner cavity of the air bag, and the upper end of the grouting pipeline extends upwards and penetrates through the prefabricated through hole of the corresponding assembly type wall body component. The grouting pipeline is positioned between the two flange plates of the H-shaped steel. The grouting pipeline is a plastic pipe or a metal pipe.
The concrete construction of the section steel upright post assembly type underground continuous wall with high bearing capacity is as follows:
as shown in fig. 1, an underground cemented soil continuous wall 1, such as a trench cut cemented soil wall, is constructed on foundation soil.
In the process of constructing the underground cemented soil continuous wall, after each section of the underground cemented soil continuous wall with a set length is constructed (for example, after each section of the underground cemented soil continuous wall with the set length of 5-10 meters is constructed), the corresponding assembly type wall body component 2 is constructed in the section of the underground cemented soil continuous wall.
The construction of the assembled wall body member sequentially comprises the following steps:
the vertical reinforced concrete prefabricated parts and the profile steel stand columns are sequentially placed into the underground cement-soil continuous wall one by one along the length direction of the underground cement-soil continuous wall, and the two adjacent vertical reinforced concrete prefabricated parts are connected through a mortise-tenon structure, namely, the vertical tenons are inserted into the corresponding vertical mortises.
In addition, when the vertical reinforced concrete prefabricated part and the profile steel upright post are inserted into the underground cement-soil continuous wall and reach the designed depth, cement slurry is injected into the air bag through a grouting machine and a grouting pipeline, so that the air bag is expanded; the expanding bottom support plate is pushed to rotate upwards around the horizontal shaft rod in the expansion process of the air bag until the expanding bottom support plate abuts against the stop limit plate, and after the expanding bottom support plate abuts against the stop limit plate, the expanding bottom support plate and the section steel stand column are approximately at an angle of 90 degrees, so that the bearing capacity of the lower portion of the section steel stand column is greatly increased, the bearing capacity of the wall body of the assembled underground diaphragm wall is improved, the enclosing requirement of a deep foundation pit is met, the construction depth of the assembled underground diaphragm wall can be increased, and the assembled underground diaphragm wall can be suitable for enclosing of the deep foundation pit.
The assembled wall body component is inserted into the underground water-soil continuous wall of the profile steel stand assembled underground continuous wall with high bearing capacity, so that the strength of the channel type cutting assembled underground continuous wall can be ensured, when a foundation pit is excavated, the soil retaining capacity and the water stopping capacity of foundation pit support can be ensured only by constructing one channel type cutting assembled underground continuous wall, the safe excavation of the foundation pit is realized, the construction period of the foundation pit support is effectively shortened, and the occupied space of the foundation pit support is reduced. Meanwhile, the assembly type wall body component is composed of a plurality of vertical reinforced concrete prefabricated parts, and two adjacent vertical reinforced concrete prefabricated parts are connected through the tenon-and-mortise structure.
And because the lower extreme of vertical reinforced concrete prefab is provided with the shaped steel stand, the lower part that forms assembled wall body component is the shaped steel stand, has alleviateed the holistic weight of assembled underground continuous wall and has reduced the operating cost.
Claims (8)
1. The utility model provides a shaped steel stand assembled underground continuous wall with high bearing capacity, characterized by includes:
the underground cement soil continuous wall is used for blocking underground water to form a foundation pit enclosure; and
an assembled wall body component inserted in the underground cement continuous wall,
the assembly type wall body component comprises a plurality of vertical reinforced concrete prefabricated parts which are sequentially arranged and distributed along the length direction of the underground cement-soil continuous wall and profile steel upright posts which are arranged at the lower ends of the vertical reinforced concrete prefabricated parts in a one-to-one correspondence manner, the vertical reinforced concrete prefabricated parts are provided with prefabricated through holes which penetrate through the upper end surface and the lower end surface of the vertical reinforced concrete prefabricated parts,
the steel upright post is provided with an air bag bottom expanding device, the air bag bottom expanding device comprises a bottom expanding support plate, a stop limit plate, an air bag and a grouting pipeline, the upper part of the bottom expanding support plate is rotatably arranged at the lower part of the steel upright post through a horizontal shaft rod, the stop limit plate is arranged at the lower part of the steel upright post, the stop limit plate is positioned above the horizontal shaft rod and used for limiting the rotating angle of the bottom expanding support plate around the horizontal shaft rod, the air bag is arranged on the steel upright post, the air bag is positioned between the bottom expanding support plate and the steel upright post, the lower end of the grouting pipeline is communicated with an inner cavity of the air bag, and the upper end of the grouting pipeline extends upwards and penetrates through a prefabricated through;
the profile steel upright is H-shaped steel, the horizontal shaft rod, the bottom expanding support plate and the stop limit plate are all positioned between two flange plates of the H-shaped steel, and the air bag is positioned between a web plate of the H-shaped steel and the bottom expanding support plate;
two air bag bottom expanding devices are arranged on the same section steel stand column and are positioned on two opposite sides of a web plate of the H-shaped steel.
2. The section steel upright assembled underground diaphragm wall with high bearing capacity of claim 1, wherein the air bag bottom expanding device further comprises a lower baffle plate, the lower baffle plate is positioned below the bottom expanding support plate, the lower baffle plate is positioned between two flange plates of the H-shaped steel, and the lower baffle plate is connected with a web plate and the flange plates of the H-shaped steel.
3. The section steel upright assembled underground continuous wall with high bearing capacity as claimed in claim 2, wherein the upper surface of the lower baffle plate is further provided with an elastic baffle plate, and the lower edge of the bottom-expanding support plate is positioned between the elastic baffle plate and the web plate of the H-shaped steel.
4. The section steel upright fabricated underground continuous wall with high bearing capacity as claimed in claim 1, 2 or 3, wherein the grouting pipe is located between two flange plates of the H-shaped steel.
5. The section steel upright assembled underground continuous wall with high bearing capacity as claimed in claim 1, 2 or 3, wherein two adjacent vertical reinforced concrete prefabricated members are connected through a mortise and tenon joint structure.
6. The profiled bar vertical column fabricated underground continuous wall with high bearing capacity as claimed in claim 5, wherein the mortise and tenon structure comprises vertical mortises provided on the side surface of one of the vertical reinforced concrete prefabricated members and vertical tenons provided on the side surface of the other vertical reinforced concrete prefabricated member and matched with the vertical mortises, the upper ends of the vertical mortises are communicated with the upper end surfaces of the vertical reinforced concrete prefabricated members, the lower ends of the vertical mortises are communicated with the lower end surfaces of the vertical reinforced concrete prefabricated members, and the vertical tenons are matched with the corresponding vertical mortises.
7. The section steel upright assembled underground continuous wall with high bearing capacity of claim 5, wherein in the same vertical reinforced concrete prefabricated member: the vertical mortise is arranged on one side face of the vertical reinforced concrete prefabricated part, the vertical tenon is arranged on the other side face of the vertical reinforced concrete prefabricated part, and the vertical mortise and the vertical tenon are positioned on two opposite sides of the vertical reinforced concrete prefabricated part.
8. The section steel upright fabricated underground continuous wall with high bearing capacity according to claim 1, 2 or 3, wherein the grouting pipe is a plastic pipe or a metal pipe.
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| CN110295526B (en) * | 2019-06-14 | 2023-08-18 | 广东工业大学 | Assembled road board for marsh lands and installation method thereof |
| CN111472348B (en) * | 2020-04-23 | 2021-10-15 | 浙江大学医学院附属妇产科医院 | Profile steel and concrete combined underground continuous wall structure and construction method thereof |
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| CN103806440B (en) * | 2014-03-05 | 2016-05-25 | 中国建筑股份有限公司 | One can be assembled and be inserted self-clamping type precast hollow diaphram wall and construction method thereof |
| CN205024719U (en) * | 2015-09-30 | 2016-02-10 | 上海建工二建集团有限公司 | Pile foundation and integrated reverse construction vertical braces system of underground continuous wall |
| CN205776157U (en) * | 2016-06-13 | 2016-12-07 | 上海强劲地基工程股份有限公司 | Assembled underground continuous wall |
| CN106120807A (en) * | 2016-07-27 | 2016-11-16 | 东通岩土科技（杭州）有限公司 | Permanent foundation pit enclosure soil cement rigid wall and construction method thereof |
| CN106869136A (en) * | 2017-02-15 | 2017-06-20 | 常州工学院 | One kind expands end formula soil bolt |
| CN107882042A (en) * | 2017-12-27 | 2018-04-06 | 上海智平基础工程有限公司 | Supporting construction and its construction method are supportted before a kind of bellows |
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Denomination of invention: Fabricated diaphragm wall with section steel column with high bearing capacity Effective date of registration: 20211102 Granted publication date: 20200605 Pledgee: Hangzhou branch of Zhejiang Tailong Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG JITONG GROUND CONSTRUCTION TECHNOLOGY Co.,Ltd. Registration number: Y2021330002139 |