CN111877315A - Local prefabricated diaphragm wall guide wall under underground facility and construction method - Google Patents
Local prefabricated diaphragm wall guide wall under underground facility and construction method Download PDFInfo
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- CN111877315A CN111877315A CN202010760279.9A CN202010760279A CN111877315A CN 111877315 A CN111877315 A CN 111877315A CN 202010760279 A CN202010760279 A CN 202010760279A CN 111877315 A CN111877315 A CN 111877315A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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Abstract
The invention discloses a local prefabricated underground diaphragm wall guide wall under an underground facility and a construction method, and the technical scheme is as follows: the guide device comprises a first guide wall and a second guide wall which are oppositely arranged, wherein a connecting plate is fixed at one end of the first guide wall, which is far away from the second guide wall; one end of the second guide wall is connected with the surrounding purlin, and the other end of the second guide wall is connected with the plurality of uplift piles; the purlin and the uplift pile are connected through the uplift pipe. The local prefabricated steel plate guide wall can overcome the difficulty of the existing construction guide wall in a local special environment; the node rigidity is big, and connection speed is fast, still can easily install the operation under the space that blocks that causes at the cable pit, and the efficiency of construction is high.
Description
Technical Field
The invention relates to the field of foundation pit engineering, in particular to a local prefabricated diaphragm wall guide wall under an underground facility and a construction method.
Background
The traditional guide wall is the most suitable choice in the construction of large underground continuous walls, the price construction is more advantageous, and the traditional reinforced concrete guide wall is difficult to construct in special environments, has little functionality and can not be used as an anti-pulling structure.
Construction of the barrier diaphragm wall of an existing structure such as a cable trench brings a new challenge, namely construction of the diaphragm wall below the existing structure. The large-scale steel sheet of traditional concrete guide wall and traditional steel sheet guide wall can't provide the convenience of construction in the middle of the underground space.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a local prefabricated diaphragm wall guide wall under an underground facility and a construction method, wherein the local prefabricated steel plate guide wall can overcome the difficulty of the existing construction guide wall in a local special environment; the node has high rigidity and high connection speed, can still be easily installed and operated in a blocking space caused by a cable trench, and has high construction efficiency;
in order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a partially prefabricated underground diaphragm wall guide wall under an underground facility, including a first guide wall and a second guide wall which are oppositely arranged, wherein a connection plate is fixed at one end of the first guide wall, which is far away from the second guide wall; one end of the second guide wall is connected with the surrounding purlin, and the other end of the second guide wall is connected with the plurality of uplift piles; the purlin and the uplift pile are connected through the uplift pipe.
As a further implementation manner, a winch pedestal, a crane pedestal and a threaded support are pre-embedded above the second guide wall.
As a further implementation manner, a threaded support is embedded above the first guide wall.
As a further implementation manner, one end of the uplift pipe is connected to the joint position of the uplift pile and the second guide wall, and the other end of the uplift pipe is connected to the set height position of the surrounding purlin.
As a further implementation mode, the connecting nodes are prefabricated on the side surfaces of the enclosing purlins, and the uplift pipes are obliquely connected between the pile tops of the uplift piles and the connecting nodes.
As a further implementation manner, the width of the second guide wall is greater than that of the first guide wall.
As a further implementation manner, the first guide wall and the connecting plate are respectively in an inverted L-shaped structure, and the orientations of the connecting plate and the first guide wall are mutually symmetrical.
In a second aspect, an embodiment of the present invention further provides a method for constructing a partially prefabricated underground diaphragm wall guide wall under an underground facility, including:
preparation work before installing the guide wall: embedding an enclosure in constructing the underground diaphragm wall, and constructing an uplift pile in the auxiliary foundation pit;
manufacturing a guide wall: the first guide wall is fixed with the connecting plate, and a threaded support is embedded in the surface of the first guide wall; pre-embedding a threaded support, a crane pedestal and a winch pedestal on the surface of the second guide wall;
installing a guide wall: and arranging the first guide wall into one side edge of the groove with a set depth, arranging the second guide wall into the other side edge of the groove, and connecting the second guide wall with the uplift pile and the surrounding purlin through the uplift pipe.
As a further implementation mode, main reinforcements are reserved on the ground surface when the uplift pile is constructed.
As a further implementation mode, connecting nodes used for connecting the uplift pipes are reserved on the side faces of the enclosing purlins, and the uplift pipes are connected with pile tops of the uplift piles and the connecting nodes of the enclosing purlins.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
(1) the guide wall and other accessories of one or more embodiments of the invention are prefabricated in a factory, the construction site of important nodes completely adopts bolts to realize assembly type connection, the rigidity of the nodes is high, the connection speed is high, and the requirements of steel structure assembly type construction can be met;
(2) the second guide wall of one or more embodiments of the invention is fixed with the soil body through the uplift pile, the uplift pipe and the surrounding purlin, and is stable in support;
(3) one or more embodiments of the invention can still be easily installed in the blocking space caused by the existing cable trench, and can effectively avoid the problem of simple function of the traditional guide wall; the bottom of the guide wall is connected with the uplift pile, so that the construction is simpler; the prefabricated large steel plate guide wall can overcome the difficulty of the existing construction guide wall in the environment of special geological conditions in the construction of the underground continuous wall.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a top view of the present disclosure according to one or more embodiments;
FIG. 2 is a front view of the present invention in accordance with one or more embodiments;
FIG. 3 is a side view of the present disclosure according to one or more embodiments;
FIG. 4 is a schematic view of a first guide wall structure according to one or more embodiments of the present invention;
the device comprises a first guide wall 1, a thread support 2, a crane pedestal 3, a winch pedestal 4, an anti-pulling pipe 5, an anti-pulling pile 6, a jack 7, an enclosing purlin 8, a cable trench 9, a connecting plate 10 and a second guide wall 11.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected directly or indirectly through an intermediate medium, or the two components can be connected internally or in an interaction relationship, and the terms can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
the embodiment provides a local prefabricated diaphragm wall guide wall under an underground facility, which is arranged below a cable trench 9, a trench is constructed below the cable trench 9, and the cable trench 9 is used as a barrier and needs to be dragged by a underpinning method. As shown in fig. 1 and 2, the groove structure comprises a first guide wall 1 and a second guide wall 11 which are oppositely arranged, and the first guide wall 1 and the second guide wall 11 are respectively arranged at two sides of the groove.
One end both sides symmetrical connection of wall 11 is led to the second encloses purlin 8, and a plurality of anti-floating piles 6 are connected to the other end below, and anti-floating pile 6 sets up along the inside vertical of soil body. Further, the uplift pile 6 is a reinforced concrete uplift pile. The uplift pile 6 is connected with the surrounding purlin 8 through an uplift pipe 5, and the uplift pipe 5 is made of steel.
As shown in fig. 2 and 3, one end of the uplift pipe 5 is connected to the junction of the uplift pile 6 and the second guide wall 11, and the other end of the uplift pipe is connected to the set height position of the surrounding purlin 8, so that the uplift pipe 5 is arranged at an inclined angle, and the support stability is ensured. The enclosing purlin 8 is provided with a reserved bolt hole at a set height position, and the bolt hole is used as a connecting node and is used for connecting the anti-pulling pipe 5.
Further, in this embodiment, the uplift pipe 5 is connected with the second guide wall 11, the uplift pile 6 and the surrounding purlin 8 by using a plurality of steel bars. Of course, in other embodiments, the uplift pipe 5 and the second guide wall 11, the uplift pile 6 and the surrounding purlin 8 can be connected by other connecting pieces capable of providing uplift force.
The construction according to the uplift pile 6 can be operated according to the construction rules of the existing uplift pile 6. Because the pile top of the uplift pile 6 is positioned underground and the construction space is smaller, the manual hole digging pile technology can be utilized, the manual hole digging pile construction is convenient and fast, and large-scale mechanical equipment is not needed. And (3) reserving main reinforcements on the ground surface for connecting the second guide wall 11 by constructing the uplift pile 6. The depth of the uplift pile 6 is determined by the reinforcement cage, the ground water level and the tension of the second guide wall 11 borne by the uplift pile.
A winch pedestal 4 and a crane pedestal 3 are pre-embedded above the second guide wall 11, the winch pedestal 4 is used for installing a winch, and the crane pedestal 3 is used for installing a crane; and a threaded support 2 is also embedded above the second guide wall 11. Because the equipment required to be borne by the second guide wall 11 is heavy, operations such as steel reinforcement cage placement, concrete guide pipe placement and the like are required; and the connection node between the lower part of the second guide wall 11 and the uplift pile 6 is larger, so the width of the second guide wall 11 (the horizontal direction shown in fig. 2 is the width direction) is larger than the width of the first guide wall 1.
The top of the first guide wall 1 is embedded with the threaded support 2, and the embedded threaded support 2 on the second guide wall 11 are used together for supporting the crane 7. Furthermore, first wall 1 is the type of falling L, and first wall 1 and second wall 11 are led and are carried on the back one side and are connected a plurality of connecting plates 10. The L-shaped guide wall is convenient to construct, and a soil body to be excavated is embedded into the soil body and is convenient to connect with the uplift pile 6; the wall forming hole is convenient to fix on the earth surface, stabilizes the wall forming hole orifice soil body, and prevents the soil body from collapsing and falling.
As shown in fig. 4, the connecting plate 10 is in an inverted L shape, and the orientation of the connecting plate is symmetrical to that of the first guide wall 1, so that the connecting plate 10 provides a lateral supporting force to ensure that the first guide wall 1 is not pushed to the inner side, thereby preventing uneven sinking.
In this embodiment, the first guide wall 1, the second guide wall 11, and the connecting plate 10 are made of steel plates; the thickness of the steel plates for manufacturing the first guide wall 1 and the second guide wall 11 is 300mm-500 mm. Of course, in other embodiments, the first guide wall 1, the second guide wall 11, and the connecting plate 10 may be made of other metal materials.
The depth of the first guide wall 1 extending to the soil body and the height of the surrounding purlin 8 connected with the second guide wall 11 are determined according to the depth of the cable trench 9 or the installation device or the mechanical position of the reinforcement cage at the lower part of the cable trench 9.
Example two:
the embodiment provides a construction method of a local prefabricated underground diaphragm wall guide wall under an underground facility, and the following construction is performed in a cable trench 9, and the construction method comprises the following steps:
the method comprises the following steps: preparation work before installing the guide wall:
(1) an embedding and enclosing element 8 is embedded when the wall is connected with the construction ground, or an enclosing purlin 8 is installed on the existing wall 9. Enclose 8 sides of purlin and leave the connected node who is used for connecting anti-tube drawing 5, this connected node leads wall 11 and later stage operation for the second and provides great pulling force, guarantees that the second leads the security of wall 11.
(2) And constructing the uplift pile 6 in the auxiliary foundation pit, and reserving main reinforcements on the ground surface to prepare for connection of the second guide wall 11 in the later period. Because 6 pile tops of uplift pile are located underground, and the construction space is less, usable manual hole digging pile technique, construction convenience, speed are very fast, do not need large-scale mechanical equipment.
Step two: manufacturing a guide wall:
the first guide wall 1 is welded and fixed with the connecting plate 10, and the threaded support 2 is embedded in the upper surface of the first guide wall 1. And the threaded support 2, the crane pedestal 3 and the winch pedestal 4 are embedded in the surface of the second guide wall 11.
Step three: installing a guide wall:
the first guide wall 1 is placed into the edge of one side of the groove to set the depth, the second guide wall 11 is placed into the edge of the other side of the groove, and the second guide wall 11 is connected with the pile top of the uplift pile 6 and the connecting node of the surrounding purlin 8 through the uplift pipe 5.
Specifically, the construction process of the uplift pile 6 is as follows:
paying off according to the designed pile position, embedding a pile casing, and filling clay around the pile casing; before drilling, the drilling machine should be leveled vertically and horizontally.
(1) And (4) positioning the drilling machine, aligning the drill bit with the pile position, and adjusting the verticality of the drilling machine after rechecking.
(2) Before drilling, the top elevation of the orifice protecting cylinder is measured by a level gauge so as to control the drilling depth. When the drilling starts, the drilling speed is noticed, and the drilling speeds of different stratums are adjusted.
(3) In the drilling process, an engineering detection ruler is adopted for observing and checking at any time, and the verticality of the drill rod is adjusted and controlled; drilling and filling the slurry protecting wall.
And hoisting the steel reinforcement cage after the hole is formed by the hole, and detecting the verticality of the formed pile by using a hole gauge before hoisting the steel reinforcement cage. In order to control the deformation of the reinforcement cage in the hoisting process, two fir poles can be symmetrically bound corresponding to the hoisting point before hoisting, the integral rigidity of the reinforcement cage is increased, and the reinforcement cage is taken out when being put down.
The lower concrete conduit is selected to be a proper conduit, and the joint must be sealed and watertight when the conduit is assembled.
After the guide pipe is placed down, the pile hole is cleaned
The concrete is poured, and before the concrete is poured, the slump and the workability of the concrete must be checked and recorded. The concrete can not be isolated when being transported to the pouring point.
And connecting the second guide wall 11 after the construction of the uplift pile. The wall is even along the ground excavation soil body of wall inner wall, spills the surface with pre-buried connected node, encloses purlin 8 at the fixed with the high strength bolt of wall inner wall even, encloses purlin 8 and uses the high strength bolt to screw up to the steel pipe that has the ring flange.
Soil is vertically put into the connecting plate 10, and then the first guide wall 1 is vertically put into the soil for connection.
The stability of the first guide wall 1 and the second guide wall 11 is further improved by the connection of the jacks 7 mounted on the threaded support 2.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The local prefabricated underground diaphragm wall guide wall under the underground facility is characterized by comprising a first guide wall and a second guide wall which are oppositely arranged, wherein a connecting plate is fixed at one end of the first guide wall, which is far away from the second guide wall; one end of the second guide wall is connected with the surrounding purlin, and the other end of the second guide wall is connected with the plurality of uplift piles; the purlin and the uplift pile are connected through the uplift pipe.
2. The underground installation underground local prefabricated underground diaphragm wall guide wall according to claim 1, wherein a winch pedestal, a crane pedestal and a threaded support are embedded above the second guide wall.
3. The underground installation underground local prefabricated underground diaphragm wall guide wall according to claim 1 or 2, characterized in that a threaded support is embedded above the first guide wall.
4. The partially prefabricated underground diaphragm wall guide wall under an underground facility as claimed in claim 1, wherein one end of the uplift pipe is connected to the joint position of the uplift pile and the second guide wall, and the other end of the uplift pipe is connected to the set height position of the surrounding purlin.
5. The underground facility lower local prefabricated diaphragm wall guide wall according to claim 4, wherein the side surface of the purlin is prefabricated with a connecting node, and the uplift pipe is obliquely connected between the pile top of the uplift pile and the connecting node.
6. The underground utility local prefabricated underground diaphragm wall guide wall of claim 1, wherein the width of the second guide wall is larger than that of the first guide wall.
7. The underground utility local prefabricated underground diaphragm wall guide wall according to claim 1, wherein the first guide wall and the connecting plate are respectively in an inverted L-shaped structure, and the orientation of the connecting plate and the first guide wall are symmetrical.
8. The method for constructing the partially prefabricated diaphragm wall guide wall under the underground installation according to any one of claims 1 to 7, which comprises the following steps:
preparation work before installing the guide wall: embedding an enclosure in constructing the underground diaphragm wall, and constructing an uplift pile in the auxiliary foundation pit;
manufacturing a guide wall: the first guide wall is fixed with the connecting plate, and a threaded support is embedded in the surface of the first guide wall; pre-embedding a threaded support, a crane pedestal and a winch pedestal on the surface of the second guide wall;
installing a guide wall: and arranging the first guide wall into one side edge of the groove with a set depth, arranging the second guide wall into the other side edge of the groove, and connecting the second guide wall with the uplift pile and the surrounding purlin through the uplift pipe.
9. The method as claimed in claim 8, wherein the main reinforcement is prepared on the ground surface when the anti-floating pile is constructed.
10. The construction method of the local prefabricated underground diaphragm wall guide wall under the underground facility as claimed in claim 8, wherein the side surface of the enclosing purlin is provided with connecting nodes for connecting the uplift pipes, and the uplift pipes are connected with the pile tops of the uplift piles and the connecting nodes of the enclosing purlin.
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| CN202010760279.9A CN111877315B (en) | 2020-07-31 | 2020-07-31 | Local prefabricated diaphragm wall guide wall under underground facility and construction method |
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| CN202010760279.9A CN111877315B (en) | 2020-07-31 | 2020-07-31 | Local prefabricated diaphragm wall guide wall under underground facility and construction method |
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| CN111877315B CN111877315B (en) | 2021-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113089645A (en) * | 2021-04-22 | 2021-07-09 | 安徽水安建设集团股份有限公司 | Slotted hole structure system for reinforcing concrete impervious wall by penetrating silt layer and construction method |
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| CN113089645A (en) * | 2021-04-22 | 2021-07-09 | 安徽水安建设集团股份有限公司 | Slotted hole structure system for reinforcing concrete impervious wall by penetrating silt layer and construction method |
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| CN111877315B (en) | 2021-06-22 |
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