CN113756316B - Construction method of passive area enhanced underground continuous wall - Google Patents
Construction method of passive area enhanced underground continuous wall Download PDFInfo
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- CN113756316B CN113756316B CN202111060394.6A CN202111060394A CN113756316B CN 113756316 B CN113756316 B CN 113756316B CN 202111060394 A CN202111060394 A CN 202111060394A CN 113756316 B CN113756316 B CN 113756316B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
Abstract
The invention provides a construction method of a passive zone enhanced underground continuous wall, which is characterized in that the underground continuous wall is constructed, the underground continuous wall comprises an enclosure section and a passive zone enhanced section, the enclosure section is arranged along the side line of a foundation pit, and the passive zone enhanced section is arranged perpendicular to the enclosure section and connected with the enclosure section; excavating from top to bottom layer by layer, constructing horizontal supports layer by layer until excavating to the base; pouring a cushion layer and a foundation bottom plate in the center of the foundation pit; pouring a cushion layer and a foundation slab around the foundation pit, chiseling the passive region reinforcing sections above the foundation when the foundation slab is poured to the passive region reinforcing sections of the underground continuous wall around, and pouring the cushion layer and the foundation slab around the foundation pit in time; and (4) dismantling the horizontal supports layer by layer from bottom to top, and pouring the basement floor layer by layer until the whole basement main body is completed. By additionally arranging the passive area reinforcing section, the underground continuous wall with the passive area reinforcement is formed, and the problems that the underground continuous wall is large in displacement deformation in the excavation process of the foundation pit, the conventional soil body reinforcement disturbance of the passive area in the pit is more, and the construction period is long are solved.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method of a passive area enhanced underground continuous wall.
Background
For foundation pit engineering in soft soil areas in the Shanghai, a large number of practices prove that in a foundation pit supporting structure, the lateral deformation curve of an underground continuous wall generally presents a bulging shape with two small ends and a large middle part (as shown in figure 1), namely the horizontal displacement near a foundation slab of a passive area in a pit is the largest. Based on the deformation form, the conventional foundation pit engineering method is to arrange passive area soil body reinforcement near the foundation of the inner side of the foundation pit so as to reduce the lateral deformation of the enclosure wall, and the soil body of a passive soil pressure area is improved and reinforced by adopting processes such as cement soil mixing piles, high-pressure jet grouting piles and the like, however, the reinforcement mode needs to carry out forced stirring such as large-area stirring, jetting and the like on the soil body, has large disturbance on undisturbed soil and occupies a large amount of construction sites in the pit.
Therefore, how to provide a construction method of a passive zone reinforced underground continuous wall with low disturbance, high bearing capacity, environmental protection and high efficiency becomes a subject in front of engineering technicians.
Disclosure of Invention
The invention provides a construction method of a passive region reinforced underground continuous wall based on the bulging shape lateral deformation form of a soft soil foundation pit underground continuous wall, which breaks through the form of a groove section of the conventional underground continuous wall, so that the groove section of the underground continuous wall is composed of a retaining section arranged along the side line of a foundation pit and a passive region reinforcing section which is perpendicular to the retaining section and connected with the retaining section, the passive region reinforcing section plays a role in reinforcing a passive region of the foundation pit, the underground continuous wall with the passive region reinforcement is formed, and the problems of large displacement deformation of the underground continuous wall, more soil disturbance caused by the reinforcement of the soil body of the passive region of the foundation pit, low construction efficiency and long construction period in the prior art are solved.
In order to solve the technical problems, the invention provides the following technical scheme:
a construction method of a passive area reinforced underground continuous wall comprises the following steps:
the working condition I is as follows: constructing an underground continuous wall, wherein the underground continuous wall comprises a retaining section and a passive area reinforcing section, the retaining section is arranged along the side line of a foundation pit, the passive area reinforcing section is perpendicular to the retaining section and is connected with the retaining section, the depth range of the passive area reinforcing section is smaller than that of the retaining section, and the top elevation of the passive area reinforcing section and the bottom elevation of the passive area reinforcing section are respectively positioned on the upper side and the lower side of a substrate;
working conditions are as follows: excavating from top to bottom layer by layer, constructing horizontal supports layer by layer until excavating to the base;
working conditions are as follows: pouring a cushion layer and a foundation slab in the center of the foundation pit;
working conditions are as follows: pouring a cushion layer and a foundation bottom plate around the foundation pit, chiseling the passive area reinforcing sections above the base when the foundation bottom plate is poured to the passive area reinforcing sections of the underground continuous wall around, and pouring the cushion layer and the foundation bottom plate around the foundation pit in time;
working condition five: and (4) dismantling the horizontal supports layer by layer from bottom to top, and pouring the basement floor layer by layer until the pouring construction of the whole basement main body is completed.
Preferably, in the construction method of the reinforced underground continuous wall in the passive area, in the first working condition, the constructed underground continuous wall is formed by measuring and paying off, conducting wall construction, grooving of the underground wall, clearing foundation, hoisting of a reinforcement cage and underwater concrete pouring, and in the grooving process of the underground wall, the groove of the enclosure section and the groove of the reinforced section in the passive area are simultaneously constructed.
Preferably, in the construction method of the passive zone reinforced underground continuous wall, the plane of the passive zone reinforced section is arranged at a position avoiding horizontal support.
Preferably, in the construction method of the passive zone reinforced underground continuous wall, the passive zone reinforced section is arranged at the midpoint of the enclosure section.
Preferably, in the construction method of the passive zone reinforced underground continuous wall, the enclosure section comprises a corner section and a strip section, and the passive zone reinforced section is vertically arranged on the inner side of a part of the strip section as required.
Preferably, in the construction method of the passive area reinforced underground continuous wall, the enclosure section is a reinforcement section, the reinforcement and depth of the enclosure section are set according to calculation, the requirements of foundation pit soil retaining and water stopping are met, and the passive area reinforced section is a plain concrete section.
Preferably, in the construction method of the passive area reinforced underground continuous wall, under the first working condition, the depth range of the passive area reinforced section is from a certain range above the foundation to a certain range below the foundation, the top elevation of the passive area reinforced section is lower than the top elevation of the enclosure section, the bottom elevation of the passive area reinforced section is higher than the bottom elevation of the enclosure section, and the vertical length range and the horizontal length dimension of the passive area reinforced section need to meet the calculation requirements of the reinforcement of the passive area of the foundation pit.
Preferably, in the construction method of foretell passive zone enhancement mode underground continuous wall, in operating mode one, the top elevation of passive zone reinforcing section and the bottom elevation of passive zone reinforcing section is located the both sides of the peak value of warping respectively, the top elevation of passive zone reinforcing section is located the depth range that deformation value on the underground continuous wall lateral deformation curve corresponds for the most 1/2 ~ 2/3 department of lateral deformation, the bottom elevation of passive zone reinforcing section is located the deformation value on the underground continuous wall lateral deformation curve and is located the most 1/2 ~ 2/3 department of lateral deformation and correspond the depth range.
Preferably, in the above construction method of the passive zone reinforced underground continuous wall, in the first working condition, the length of the passive zone reinforced section is 1 to 1.5 times of the length of the strip section, and the width of the passive zone reinforced section is 1 to 1.5 times of the width of the strip section.
Preferably, in the construction method of the passive area reinforced underground continuous wall, the passive area reinforced section and the enclosure section are connected through connecting steel bars, and the connecting steel bars need to meet the anchoring requirement.
According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:
the invention provides a construction method of a passive region reinforced underground continuous wall, which is characterized in that the underground continuous wall is constructed, the underground continuous wall comprises a containment section and a passive region reinforced section, the containment section is arranged along the side line of a foundation pit, the passive region reinforced section is arranged perpendicular to the containment section and is connected with the containment section, the depth range of the passive region reinforced section is smaller than that of the containment section, and the top elevation of the passive region reinforced section and the bottom elevation of the passive region reinforced section are respectively positioned at the upper side and the lower side of a base; excavating from top to bottom layer by layer, constructing horizontal supports layer by layer until excavating to the base; pouring a cushion layer and a foundation slab in the center of the foundation pit; pouring a cushion layer and a foundation slab around the foundation pit, chiseling the passive region reinforcing sections above the foundation when the foundation slab is poured to the passive region reinforcing sections of the underground continuous wall around, and pouring the cushion layer and the foundation slab around the foundation pit in time; and (4) dismantling the horizontal supports layer by layer from bottom to top, and pouring the basement floor layer by layer until the pouring construction of the whole basement main body is completed. Aiming at the morphological characteristics of small two ends and large middle bulging of the lateral deformation curve of the underground diaphragm wall in the foundation pit engineering in the soft soil area, the invention greatly increases the integral rigidity of the underground diaphragm wall by adding the passive region reinforcing section, improves the strength and the horizontal bearing capacity of the passive region of the foundation pit, reduces the action of bending moment, improves the internal force distribution of the structure, can effectively reduce the deformation of the foundation pit, increases the stability of the foundation pit, and simultaneously reduces the thickness and the insertion depth of the enclosure section of the underground diaphragm wall. On the other hand, the passive region reinforcing section is additionally arranged, so that the passive region in the pit of the underground continuous wall is reinforced, the vertical depth range of the passive region reinforcing section is less than that of the enclosure section, namely the passive region reinforcing section is arranged in the region near the base, the deformation form of the expansion belly shape of the underground continuous wall is met, and the passive region reinforcing section has obvious pertinence to deformation control of the foundation pit in the soft soil region. On the other hand, soil body reinforcing piles such as cement soil mixing piles and high-pressure jet grouting piles do not need to be additionally constructed on the inner side of the pit in the foundation pit engineering, so that not only is the soil body reinforcing and maintaining time saved for 2-4 weeks, but also large-area disturbance of soil body reinforcing construction to an original state soil body in the pit is avoided, and the foundation pit has the advantages of high construction efficiency, less soil body disturbance and surrounding environment protection.
Drawings
Fig. 1 is a schematic diagram of a typical underground continuous wall lateral deformation curve of a foundation pit in a soft soil area.
Fig. 2 is a cross section of a typical trough section of a passive zone reinforced underground diaphragm wall.
Fig. 3 is a typical longitudinal section of the passive zone reinforced underground diaphragm wall.
FIG. 4 is a schematic view of the depth range of the passive zone enhancement section.
FIG. 5 is a schematic cross-sectional view of a first working condition in a construction method of a passive zone reinforced underground diaphragm wall.
FIG. 6 is a schematic cross-sectional view of a second working condition in a construction method of a passive zone reinforced underground diaphragm wall.
FIG. 7 is a schematic cross-sectional view of a third working condition in a construction method of a passive zone reinforced underground diaphragm wall.
FIG. 8 is a schematic cross-sectional view of a working condition four in the construction method of the reinforced underground diaphragm wall of the passive area.
FIG. 9 is a schematic cross-sectional view of a fifth working condition in a construction method of the reinforced underground diaphragm wall of the passive area.
FIG. 10 is a schematic sectional view of a sixth working condition in a construction method of the reinforced underground diaphragm wall of the passive area.
Fig. 11 is a schematic cross-sectional view of the basement body of the present invention when the pouring construction is completed.
In the figure: the concrete structure comprises a support section 1, a corner section 1A, a strip section 1B, a passive area reinforcing section 2, a connecting steel bar 3, a base 4, a horizontal support 5, a foundation slab 6, a basement floor 7 and a base 8.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. The technical contents and features of the present invention will be described in detail below with reference to the accompanying drawings by way of examples. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
Referring to fig. 1 to 11, the present embodiment discloses a construction method of a reinforced underground diaphragm wall of a passive area, including the following steps:
the working condition I is as follows: constructing an underground continuous wall, wherein the underground continuous wall comprises an enclosure section 1 and a passive area reinforcing section 2, the enclosure section 1 is arranged along the side line of a foundation pit, the passive area reinforcing section 2 is arranged perpendicular to the enclosure section 1 and is connected with the enclosure section 1, the depth range of the passive area reinforcing section 2 is smaller than that of the enclosure section 1, the top elevation of the passive area reinforcing section 2 and the bottom elevation of the passive area reinforcing section 2 are respectively positioned on the upper side and the lower side of a base 4, namely the pit bottom;
working conditions are as follows: excavating earth layer by layer from top to bottom, constructing horizontal supports 5 layer by layer until excavating to a base;
working conditions are as follows: pouring a cushion layer (not marked) in the center of the foundation pit and the foundation slab 6;
working conditions are as follows: pouring a cushion layer and a foundation slab 6 around the foundation pit, chiseling the passive region reinforcing sections 2 above the base when the foundation slab 6 is poured to the passive region reinforcing sections 2 of the underground continuous wall around, and pouring the cushion layer and the foundation slab 6 around the foundation pit in time;
working condition five: and (3) removing the horizontal supports 5 layer by layer from bottom to top, and pouring the basement floor 7 layer by layer until the pouring construction of the whole basement main body is completed.
The invention provides a construction method of a passive region enhanced underground continuous wall, which is characterized in that the underground continuous wall is constructed, the underground continuous wall comprises a containment section 1 and a passive region enhanced section 2, the containment section 1 is arranged along the side line of a foundation pit, the passive region enhanced section 2 is arranged perpendicular to the containment section 1 and is connected with the containment section 1, the depth range of the passive region enhanced section 2 is smaller than that of the containment section 1, and the top elevation of the passive region enhanced section 2 and the bottom elevation of the passive region enhanced section 2 are respectively positioned at the upper side and the lower side of a substrate 4; excavating from top to bottom layer by layer, and constructing horizontal supports 5 layer by layer until excavating to the base; pouring a cushion layer at the center of the foundation pit and a foundation slab 6; pouring a cushion layer and a foundation slab 6 around the foundation pit, chiseling the passive region reinforcing sections 2 above the base when the foundation slab 6 is poured to the passive region reinforcing sections 2 of the underground continuous wall around, and pouring the cushion layer and the foundation slab 6 around the foundation pit in time; and (4) dismantling the horizontal supports 5 layer by layer from bottom to top, and pouring the basement floor slab 7 layer by layer until the pouring construction of the whole basement main body is completed. Aiming at the morphological characteristics of a bulging shape that two ends of a lateral deformation curve of the underground continuous wall are small and the middle of the lateral deformation curve is large in foundation pit engineering in a soft soil area, the invention greatly increases the overall rigidity of the underground continuous wall by adding the passive region reinforcing section 2, improves the strength and horizontal bearing capacity of the passive region of the foundation pit, reduces the action of bending moment, improves the internal force distribution of the structure, can effectively reduce the deformation of the foundation pit, increases the stability of the foundation pit, and simultaneously reduces the thickness and the insertion depth of the enclosure section 1 of the underground continuous wall. On the other hand, the passive region reinforcing section 2 is additionally arranged, so that the passive region in the pit of the underground continuous wall is reinforced, the vertical depth range of the passive region reinforcing section 2 is less than that of the enclosure section 1, namely the passive region reinforcing section is arranged in the region near the base 4, the deformation form of the bulging belly shape of the underground continuous wall is met, and the deformation control of the foundation pit in the soft soil region is obviously targeted. On the other hand, soil body reinforcing piles such as cement soil mixing piles, high-pressure jet grouting piles and the like do not need to be additionally constructed on the inner side of the pit in the foundation pit engineering, so that the soil body reinforcing and maintaining time of 2-4 weeks is saved, large-area disturbance of soil body reinforcing construction to an original soil body in the pit is avoided, and the foundation pit has the advantages of high construction efficiency, less soil body disturbance and surrounding environment protection.
Preferably, in the construction method of the passive area reinforced underground continuous wall, in the first working condition, the constructed underground continuous wall is formed by measuring and paying off, conducting wall construction, underground wall grooving, foundation cleaning, steel reinforcement cage hoisting and underwater concrete pouring, and in the underground wall grooving process, the groove of the enclosure section 1 and the groove of the passive area reinforced section 2 are simultaneously constructed.
Preferably, in the construction method of the passive zone reinforced underground continuous wall, the plane of the passive zone reinforced section 2 is arranged at a position away from the horizontal support 5, so as to facilitate supporting construction.
Preferably, in the construction method of the passive zone reinforced underground continuous wall, the passive zone reinforced section 2 is arranged at the midpoint of the enclosure section 1, so that the hoisting balance of the trough section is facilitated.
Preferably, in the construction method of the passive zone reinforced underground continuous wall, the enclosure section 1 includes a corner section 1A and a strip section 1B, and the passive zone reinforced section 3 is vertically arranged on the inner side of a part of the strip section 1B as required.
Preferably, in the construction method of the passive area reinforced underground continuous wall, the enclosure section 1 is a reinforcement section, the reinforcement and depth of the enclosure section are set according to calculation, the requirements of foundation pit soil retaining and water stopping are met, and the passive area reinforced section 2 is a plain concrete section. The adoption plain concrete does not prepare the reinforcing bar, can make things convenient for the later stage to the chisel of basement 4 on passive area reinforcing section 2 promptly part above the basement to remove.
Preferably, in the construction method of the reinforced underground diaphragm wall of the passive area, in the first working condition, the depth range of the reinforced section 2 of the passive area is from a certain range above the base 4 to a certain range below the base 4, the top elevation of the reinforced section 2 of the passive area is lower than the top elevation of the enclosure section 1, the bottom elevation of the reinforced section 2 of the passive area is higher than the bottom elevation of the enclosure section 1, and the vertical length range and the transverse length size of the reinforced section 2 of the passive area need to meet the calculation requirements of the reinforcement of the passive area of the foundation pit. In this embodiment, the length of the passive area enhancement section 2 is 1 to 1.5 times of the length of the strip-shaped section 1B, and the width of the passive area enhancement section 2 is 1 to 1.5 times of the width of the strip-shaped section 1B, so that the required passive area enhancement effect is satisfied by using the passive area enhancement section 2 as small as possible.
Preferably, in the construction method of foretell passive zone enhancement mode underground continuous wall, operating mode one, passive zone enhancement section 2's top elevation and passive zone enhancement section 2's end elevation is located the both sides of the deformation peak value respectively, passive zone enhancement section 2's top elevation is located the depth range that deformation value on the lateral deformation curve of underground continuous wall corresponds for the most 1/2 ~ 2/3 department of lateral deformation, passive zone enhancement section 2's end elevation is located the deformation value on the lateral deformation curve of underground continuous wall and is located the most 1/2 ~ 2/3 department of lateral deformation and correspond the depth range to the realization has better passive zone reinforcing effect under the prerequisite of using same size passive zone enhancement section 2.
In this embodiment, the elevation at the bottom of the passive area reinforcing section 2 is the horizontal position corresponding to the most lateral deformation 1/2 position on the lateral deformation curve of the underground diaphragm wall located below the substrate 4, and the elevation at the bottom of the passive area reinforcing section 2 is the horizontal position corresponding to the most lateral deformation 1/2 position on the lateral deformation curve of the underground diaphragm wall located below the substrate 4.
Preferably, in the construction method of the passive area reinforced underground continuous wall, the passive area reinforced section 2 and the enclosure section 1 are connected through the connecting steel bars 3, and the connecting steel bars 3 need to meet the anchoring requirement.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (7)
1. A construction method of a passive zone reinforced underground continuous wall is characterized by comprising the following steps:
the working condition I is as follows: the construction underground continuous wall, underground continuous wall includes enclosure section and passive zone reinforcing section, enclosure section sets up along the foundation ditch sideline, passive zone reinforcing section perpendicular to enclosure section sets up to be connected with enclosure section, passive zone reinforcing section's depth range is less than enclosure section, passive zone reinforcing section's top elevation and passive zone reinforcing section's bottom elevation are located the upper and lower both sides of basement respectively, in operating mode one, passive zone reinforcing section depth range is in the certain range below the basement above the certain range to below the basement, passive zone reinforcing section top elevation is less than enclosure section top elevation, passive zone reinforcing section bottom elevation is higher than enclosure section bottom elevation, passive zone reinforcing section's vertical length scope and horizontal length size must satisfy the reinforced calculation requirement in foundation ditch passive zone, the top elevation of the passive zone reinforcing section and the bottom elevation of the passive zone reinforcing section are respectively positioned at two sides of a deformation peak value, the top elevation of the passive zone reinforcing section is positioned in a depth range corresponding to a position where a deformation value on a lateral deformation curve of an underground diaphragm wall is the most lateral deformation 1/2-2/3, the bottom elevation of the passive zone reinforcing section is positioned in a depth range corresponding to a position where a deformation value on a lateral deformation curve of the underground diaphragm wall is the most lateral deformation 1/2-2/3, the constructed underground diaphragm wall is formed by measuring and paying off, guide wall construction, underground wall grooving, foundation cleaning, steel reinforcement cage hoisting and underwater pouring, and in the underground wall grooving process, a groove of a retaining section and a groove of the passive zone reinforcing section are simultaneously constructed;
and a second working condition: excavating from top to bottom layer by layer, constructing horizontal supports layer by layer until excavating to a base;
working conditions are as follows: pouring a cushion layer and a foundation slab in the center of the foundation pit;
working conditions are as follows: pouring a cushion layer and a foundation bottom plate around the foundation pit, chiseling the passive area reinforcing sections above the base when the foundation bottom plate is poured to the passive area reinforcing sections of the underground continuous wall around, and pouring the cushion layer and the foundation bottom plate around the foundation pit in time;
working condition five: and (4) dismantling the horizontal supports layer by layer from bottom to top, and pouring the basement floor layer by layer until the pouring construction of the whole basement main body is completed.
2. The method of constructing a reinforced underground diaphragm wall of a passive zone as claimed in claim 1, wherein the plane of the reinforced section of the passive zone is disposed so as to avoid the horizontal support.
3. The method of constructing a reinforced underground diaphragm wall of a passive zone as claimed in claim 1, wherein the reinforced section of the passive zone is provided at a midpoint of the envelope section.
4. The method of claim 1, wherein the enclosure section includes a corner section and a strip section, and the passive zone reinforcing section is vertically disposed inside a portion of the strip section as required.
5. The construction method of the passive zone reinforced underground continuous wall as claimed in claim 1, wherein the enclosure section is a reinforcement section, the reinforcement and depth of which are set according to calculation and satisfy the requirements of retaining soil and stopping water of the foundation pit, and the passive zone reinforced section is a plain concrete section.
6. The construction method of the passive zone reinforced underground continuous wall as claimed in claim 1, wherein in the first working condition, the length of the passive zone reinforced section is 1 to 1.5 times of the length of the strip-shaped section, and the width of the passive zone reinforced section is 1 to 1.5 times of the width of the strip-shaped section.
7. The construction method of the passive zone reinforced underground continuous wall as claimed in claim 1, wherein the passive zone reinforced section and the enclosure section are connected by connecting steel bars, and the connecting steel bars meet anchoring requirements.
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| CN102677653B (en) * | 2012-06-05 | 2014-08-20 | 中国建筑第八工程局有限公司 | Variable cross section construction method for underground continuous wall |
| CN103195049B (en) * | 2013-04-02 | 2016-03-30 | 中铁第四勘察设计院集团有限公司 | A kind of variation rigidity underground continuous wall-enclosure structure |
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