CN107558477B - Supporting structure combining foundation pit and side slope and construction method - Google Patents
Supporting structure combining foundation pit and side slope and construction method Download PDFInfo
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- CN107558477B CN107558477B CN201710984255.XA CN201710984255A CN107558477B CN 107558477 B CN107558477 B CN 107558477B CN 201710984255 A CN201710984255 A CN 201710984255A CN 107558477 B CN107558477 B CN 107558477B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The invention discloses a supporting structure combining a foundation pit and a side slope and a construction method, wherein the supporting structure comprises a plurality of supporting piles which are arranged at equal intervals, a first anchor rope is arranged between every two adjacent supporting piles, a crown beam is arranged on each supporting pile, a first hole is formed in each crown beam, one end of each first anchor rope penetrates through each first hole and is fixedly connected with each crown beam through a first anchor, an upright post and a soil retaining plate are poured on each crown beam through a supporting die, a second anchor rope is connected onto each upright post, a second hole is formed in each upright post, and one end of each second anchor rope penetrates through each second hole and is fixedly connected with each upright post through a second anchor. The invention can carry out temporary foundation pit excavation close to the slope toe of the side slope and project construction under special conditions, the construction is simple and convenient, and the temporary supporting structure of the foundation pit is utilized, thereby not only ensuring the coordination and unification of front and back design and construction, but also changing waste into valuable and saving the construction cost.
Description
Technical Field
The invention relates to the technical field of building foundation pit and side slope engineering, in particular to a supporting structure combining a foundation pit and a side slope and a construction method.
Background
Along with the expansion of cities, construction land is more and more tense, temporary foundation pit excavation needs to be performed close to the slope toe of the side slope sometimes, and the side slope needs to be permanently supported after the foundation pit is backfilled. Generally speaking, a foundation pit supporting structure is used as a temporary structure, the design service life of the foundation pit supporting structure is generally 12 months, the foundation pit supporting structure loses the function after backfilling of the foundation pit and becomes construction waste buried underground; the design service cycle of the side slope supporting structure as a permanent structure is generally not less than 50 years, and the side slope supporting structure must be kept stable and have a certain safety factor in the life cycle of a protected object. In engineering practice, the foundation pit excavation in the early stage and the slope support in the later stage are usually designed and constructed respectively according to two distinct stages, overall consideration is lacked between the foundation pit excavation in the early stage and the slope support in the later stage, conflict before and after design or repetition before and after construction is easily caused, and therefore a lot of unnecessary troubles and waste are brought. If the two can be effectively combined, the temporary supporting structure of the foundation pit is fully considered to be utilized when the permanent supporting structure of the side slope is designed, the coordination and unification of front and back design and construction can be ensured, waste can be changed into valuable, and the construction cost can be saved.
Therefore, it is very necessary to design a supporting structure and a construction method which can be used for combining the foundation pit and the side slope, and have the advantages of simple and convenient construction and cost saving when the temporary foundation pit excavation is carried out close to the slope toe of the side slope and the engineering construction is carried out under special conditions.
Disclosure of Invention
The invention aims to provide a supporting structure combining a foundation pit and a side slope and a construction method, so as to solve the problems in the background technology.
In order to realize the purpose, the invention provides the following technical scheme: the utility model provides a supporting construction that foundation ditch and side slope combined together, includes the fender pile that a plurality of equidistant arranged, adjacent two be provided with first anchor rope between the fender pile, the top of fender pile is provided with the hat roof beam, be provided with the confession on the hat roof beam the first hole that first anchor rope passed, the one end of first anchor rope is passed first hole and through first ground tackle with hat roof beam fixed connection, it has poured stand and fender breast board through a mould on the hat roof beam, be connected with the second anchor rope on the stand, be provided with the confession on the stand the second hole that the second anchor rope passed, the one end of second anchor rope is passed the second hole and through the second ground tackle with stand fixed connection.
Preferably, the upright posts are connected with the soil retaining plates through embedded steel bars.
Preferably, the columns, the soil guard plates, the crown beams and the support piles are of an integral structure.
Preferably, the plane positions of the second anchor cables are arranged in one-to-one correspondence with the plane positions of the upright posts.
The construction method of the supporting structure combining the foundation pit and the side slope comprises the following steps:
s1, during construction, firstly, excavating earthwork layer by layer on an upper side slope according to a certain slope ratio, constructing a soil nail and a second sprayed concrete surface layer by layer until the earthwork is excavated to a position below a slope toe design ground, and meanwhile, constructing a second anchor rope serving as a later permanent supporting structure component in advance, and ensuring that the plane position of the second anchor rope is in one-to-one correspondence with the plane position of the designed upright post;
s2, constructing the supporting piles at first, arranging the supporting piles at equal intervals, constructing the first anchor cables between two adjacent supporting piles, constructing the crown beams arranged at the pile tops of the first anchor cables, paying attention to reserve first holes for the first anchor cables to freely penetrate when the crown beams are poured, simultaneously embedding the embedded steel bars according to the plane positions of the stand columns, stretching and locking the first anchor cables by adopting the first anchors after the supporting piles, the crown beams and the first anchor cables reach the strength required by design, then excavating the soil of the lower foundation pit in a layered mode, constructing a first sprayed concrete surface layer on one side, close to the foundation pit, of each supporting pile in a layered mode until the soil is excavated to the bottom surface of the designed foundation pit, and then constructing a basement structure and a main body structure in the foundation pit;
s3, after the basement structure construction is completed and the main structure construction is carried out to the slope toe design ground, foundation pit backfilling is carried out, after backfilling is carried out to the top surface elevation of the crown beam, formwork erection is started to pour the stand column and the soil retaining plate, the stand column, the soil retaining plate, the crown beam and the supporting pile form a whole, holes for allowing the second anchor cables to freely penetrate through are reserved during the stand column pouring, after the stand column and the soil retaining plate reach the strength required by the design, the residual earthwork of the slope toe foundation pit is backfilled and the layered backfilling of the earthwork behind the soil retaining plate is carried out, after the earthwork is backfilled to the slope top height of the upper slope, the second anchor cables penetrate through the reserved holes of the stand column, then the backfilling of the earthwork behind the soil retaining plate is carried out continuously until the backfilling is carried out to the slope top height designed for the upper slope; and finally, tensioning and locking the second anchor cable on the upright post, and performing permanent anticorrosion treatment.
Compared with the prior art, the invention has the beneficial effects that: the supporting structure and the construction method combining the foundation pit and the side slope comprise a supporting pile, a crown beam, a stand column, a soil retaining plate, a first anchor rope, a first anchor device, a first sprayed concrete surface layer, a second sprayed concrete surface layer, a soil nail, a second anchor rope and a second anchor device, wherein the upper side slope is temporarily supported by the soil nail and the second sprayed concrete surface layer, then the lower foundation pit is temporarily supported by the supporting pile, the crown beam, the first anchor rope and the first sprayed concrete surface layer, and after the foundation pit is backfilled, the upper side slope is permanently supported by the stand column, the soil retaining plate and the second anchor rope; the pile plate type permanent side slope supporting structure is formed by effectively utilizing the supporting piles and the top beams which belong to a part of the temporary foundation pit supporting structure, the upright columns, the soil retaining plates and the second anchor cables, the structure is clear in stress and simple and convenient to construct, the later-stage permanent side slope supporting cost can be greatly saved, and the pile plate type permanent side slope supporting structure has good economic benefits and popularization value.
Drawings
FIG. 1 is a schematic side view of a supporting structure for a combination of a foundation pit and a side slope in temporary supporting of the foundation pit;
FIG. 2 is a schematic structural diagram of a supporting structure combining a foundation pit and a side slope in front view during temporary supporting of the foundation pit;
FIG. 3 is a schematic side view of a supporting structure of a foundation pit and a side slope in permanent supporting of the side slope;
FIG. 4 is a schematic structural view of a supporting structure combining a foundation pit and a side slope in front view during permanent supporting of the side slope;
fig. 5 is a schematic plan view of a top beam and a column of a supporting structure combining a foundation pit and a side slope.
In the figure: 1-supporting a pile; 2-a crown beam; 3-upright post; 4-a soil retaining plate; 5-a first anchor cable; 6-a first anchorage device; 7-first shotcrete surface layer; 8-second shotcrete surface layer; 9-soil nailing; 10-a second anchor cable; 11-a second anchorage; 12-backfilling; 13-basement structure; 14-main body structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a supporting construction that foundation ditch and side slope combined together, includes a plurality of equidistant fender pile 1 of arranging, adjacent two be provided with first anchor rope 5 between the fender pile 1, the top of fender pile 1 is provided with hat roof beam 2, be provided with the confession on the hat roof beam 2 the first hole that first anchor rope 5 passed, the one end of first anchor rope 5 is passed first hole and through first ground tackle 6 with hat roof beam 2 fixed connection, post 3 and fender apron 4 have been pour through the formwork on the hat roof beam 2, be connected with second anchor rope 10 on the post 3, be provided with the confession on the post 3 the second hole that second anchor rope 10 passed, the one end of second anchor rope 10 pass the second hole and through second ground tackle 11 with post 3 fixed connection.
The upright post 3 is connected with the soil retaining plate 4 through embedded steel bars.
The upright post 3, the soil guard plate 4, the crown beam 2 and the support pile 1 are of an integral structure.
The plane positions of the second anchor cables 10 are arranged in one-to-one correspondence with the plane positions of the upright posts 3.
The construction method of the supporting structure combining the foundation pit and the side slope comprises the following steps:
s1, during construction, firstly excavating earthwork layer by layer on an upper side slope according to a certain slope rate, constructing a soil nail 9 and a second sprayed concrete surface layer 8 layer by layer until the earthwork is excavated to the position below a slope toe design ground, paying attention to and pre-constructing a second anchor cable 10 serving as a later-stage permanent supporting structure component, and ensuring that the plane position of the second anchor cable 10 and the plane position of the designed upright post 3 are arranged in a one-to-one correspondence manner;
s2, constructing the supporting piles 1, arranging the supporting piles 1 at equal intervals, constructing the first anchor cables 5 between two adjacent supporting piles 1, constructing the crown beams 2 arranged at the pile tops of the first anchor cables 5, reserving first holes for the first anchor cables 5 to freely penetrate when the crown beams 2 are poured, pre-burying the pre-buried reinforcing steel bars according to the plane positions of the stand columns 3, stretching and locking the first anchor cables 5 by using the first anchorage devices 6 after the supporting piles 1, the crown beams 2 and the first anchor cables 5 reach the strength required by design, excavating the lower foundation pit earthwork in layers, constructing the first sprayed concrete surface layer 7 on one side, close to the foundation pit, of the supporting piles 1 in layers until the earthwork is excavated to the bottom surface of the designed foundation pit, and constructing a basement structure 13 and a main structure 14 in the foundation pit;
s3, after the construction of the basement structure 13 is completed and the main structure 14 is constructed above the toe design ground, foundation pit backfilling is carried out, after the top surface of the crown beam 2 is backfilled to the elevation, formwork erecting and pouring are started to be carried out on the stand column 3 and the soil retaining plate 4, the stand column 3, the soil retaining plate 4, the crown beam 2 and the supporting pile 1 are connected through the embedded steel bars, a whole body is formed, when the stand column 3 is poured, holes for allowing the second anchor cables 10 to freely penetrate through are reserved, after the stand column 3 and the soil retaining plate 4 reach the strength required by the design, the remaining earthwork of the toe foundation pit is backfilled and the layered backfilling of the rear earthwork of the soil retaining plate 4 is carried out, after the earthwork is backfilled to the top height of the upper slope, the second anchor cables 10 penetrate through the holes reserved in the stand column 3, then the rear earthwork of the soil retaining plate 4 is backfilled continuously carried out until the backfilled to the top height of the upper slope design; and finally, tensioning and locking the second anchor cable 10 on the upright post 3, and performing permanent anticorrosion treatment.
The working principle is as follows: the supporting structure and the construction method combining the foundation pit and the side slope comprise supporting piles 1, crown beams 2, stand columns 3, soil retaining plates 4, first anchor cables 5, first ground tackle 6, first sprayed concrete surface layers 7, second sprayed concrete surface layers 8, soil nails 9, second anchor cables 10 and second ground tackle 11, wherein the upper side slope is temporarily supported by the soil nails 9 and the second sprayed concrete surface layers 8, then the lower foundation pit is temporarily supported by the supporting piles 1, the crown beams 2, the first anchor cables 5 and the first sprayed concrete surface layers 7, and after the foundation pit is backfilled, the upper side slope is permanently supported by the stand columns 3, the soil retaining plates 4 and the second anchor cables 10; the method for pouring the upright post 3 by embedding the steel bars on the top beam 2 by coordinately considering the temporary support of the foundation pit excavation at the early stage and the permanent support of the side slope at the later stage effectively utilizes the support pile 1 and the top beam 2 which are part of the temporary foundation pit support structure, and forms a pile-plate type permanent side slope support structure with the upright post 3, the soil retaining plate 4 and the second anchor cable 10.
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 (4)
1. The supporting method is characterized in that construction is carried out based on a supporting structure, the supporting structure comprises a plurality of supporting piles (1) which are arranged at equal intervals, a first anchor rope (5) is arranged between every two adjacent supporting piles (1), the top end of each supporting pile (1) is provided with a crown beam (2), each crown beam (2) is provided with a first hole through which the first anchor rope (5) penetrates, one end of each first anchor rope (5) penetrates through the first hole and is fixedly connected with the crown beam (2) through a first anchor (6), each crown beam (2) is poured with a stand column (3) and a soil retaining plate (4) through a supporting die, each stand column (3) is connected with a second anchor rope (10), each stand column (3) is provided with a second hole through which the second anchor rope (10) penetrates, and one end of each second anchor rope (10) penetrates through the second hole and is fixedly connected with the stand column (3) through a second anchor (11);
the supporting method comprises the following steps:
s1, during construction, firstly excavating earthwork layer by layer on an upper side slope according to a certain slope rate, constructing a soil nail (9) and a second sprayed concrete surface layer (8) layer by layer until the earthwork is excavated to the position below a slope toe design ground, paying attention to and simultaneously constructing a second anchor cable (10) serving as a later-stage permanent supporting structure in advance, and ensuring that the plane position of the second anchor cable (10) is in one-to-one correspondence with the plane position of the designed upright post (3);
s2, constructing the supporting piles (1), arranging the supporting piles (1) at equal intervals, constructing the first anchor cables (5) between two adjacent supporting piles (1), constructing the crown beams (2) arranged at the pile tops of the first anchor cables (5), reserving first holes for the first anchor cables (5) to freely penetrate when the crown beams (2) are poured, embedding reinforcing steel bars according to the plane positions of the stand columns (3), constructing a first sprayed concrete surface layer (7) on one side, close to a foundation pit, of each supporting pile (1), the crown beams (2) and the first anchor cables (5) in a layered mode until the strength of each supporting pile (1), the first anchor cables (5) is required by design, adopting a first anchorage device (6) to stretch and lock the first anchor cables (5), then excavating the foundation pit earthwork on the lower portion in a layered mode, constructing a first sprayed concrete surface layer (7) on one side, close to the foundation pit, of each supporting pile (1) until the first sprayed concrete surface layer is excavated to the bottom surface of the designed foundation pit, and then constructing a foundation pit structure (13) and a main structure (14) in the foundation pit;
s3, after the construction of a basement structure (13) is completed and a main body structure (14) is constructed to be more than the design ground of a slope toe, foundation pit backfilling is carried out, after backfilling is carried out to the top surface elevation of the crown beam (2), formwork pouring is started to pour the stand column (3) and the soil retaining plate (4), the stand column (3), the soil retaining plate (4), the crown beam (2) and the supporting pile (1) form a whole, holes for the second anchor cables (10) to freely pass through are reserved when the stand column (3) and the soil retaining plate (4) are poured, after the stand column (3) and the soil retaining plate (4) reach the strength required by design, the remaining earthwork of the slope toe foundation pit is backfilled and the layered backfilling of the earthwork behind the soil retaining plate (4) is carried out, after the earthwork is backfilled to the slope top height of the slope top of the upper slope, the second anchor cable (10) is firstly reserved through the holes of the stand column (3), and then the backfilling of the earthwork behind the soil retaining plate (4) is carried out until the slope top height of the slope top is backfilled to the upper slope top is designed; and finally, tensioning and locking the second anchor cable (10) on the upright post (3), and performing permanent antiseptic treatment.
2. A supporting method of a foundation pit and a side slope combined as claimed in claim 1, wherein: the upright posts (3) are connected with the soil retaining plates (4) through embedded steel bars.
3. A supporting method of combining a foundation pit and a side slope as claimed in claim 1, wherein: the upright posts (3), the soil retaining plates (4), the crown beams (2) and the support piles (1) are of an integral structure.
4. A supporting method of a foundation pit and a side slope combined as claimed in claim 1, wherein: the plane positions of the second anchor cables (10) are in one-to-one correspondence with the plane positions of the upright posts (3).
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| CN201710984255.XA CN107558477B (en) | 2017-10-20 | 2017-10-20 | Supporting structure combining foundation pit and side slope and construction method |
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| CN201710984255.XA CN107558477B (en) | 2017-10-20 | 2017-10-20 | Supporting structure combining foundation pit and side slope and construction method |
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| CN107558477B true CN107558477B (en) | 2023-03-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110565657A (en) * | 2019-08-27 | 2019-12-13 | 江苏省地质矿产局第三地质大队 | Supporting structure for reinforcing landslide and construction method |
| CN113006079A (en) * | 2021-02-22 | 2021-06-22 | 河南省远基岩土工程有限公司 | Foundation pit extension support body and foundation pit extension support method |
| CN116623682B (en) * | 2023-05-11 | 2024-03-19 | 中冶武勘工程技术有限公司 | Continuous external corner self-locking support system for mountain building high-steep filling side slope and construction method thereof |
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| CN201395794Y (en) * | 2008-12-08 | 2010-02-03 | 中国建筑西南勘察设计研究院有限公司 | Foundation ditch with concealed columns and soil-nailing support |
| CN102330432A (en) * | 2011-06-16 | 2012-01-25 | 兰州理工大学 | Panel-type framework prestressed anchor rod flexible support structure and construction method thereof |
| CN103046561B (en) * | 2012-12-31 | 2016-02-03 | 中国建筑西南勘察设计研究院有限公司 | Anchor draws campshed anchorage wall compound retaining structure |
| CN103437370A (en) * | 2013-07-31 | 2013-12-11 | 广州市设计院 | Method and supporting structure for slip resisting and soil retaining of abrupt slope |
| CN103758132B (en) * | 2014-01-08 | 2016-03-02 | 湖北中南勘察基础工程有限公司 | The construction technology of the cantilever soldier pile retaining structure on slope is put in a kind of combination |
| CN105649091A (en) * | 2015-04-30 | 2016-06-08 | 中国建筑第四工程局有限公司 | High slope support method and structure |
| CN207469262U (en) * | 2017-10-20 | 2018-06-08 | 甘肃中建市政工程勘察设计研究院 | The supporting construction that a kind of foundation pit is combined with side slope |
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