CN216041203U - Passive area enhancement mode underground continuous wall structure - Google Patents
Passive area enhancement mode underground continuous wall structure Download PDFInfo
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- CN216041203U CN216041203U CN202122197113.3U CN202122197113U CN216041203U CN 216041203 U CN216041203 U CN 216041203U CN 202122197113 U CN202122197113 U CN 202122197113U CN 216041203 U CN216041203 U CN 216041203U
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Abstract
The utility model discloses a passive region enhanced underground continuous wall structure, which adopts an enclosure section and a passive region enhanced section, wherein the enclosure section is arranged along the side line of a foundation pit, the passive region enhanced section is perpendicular to the enclosure section and is connected with the enclosure section, the part of the passive region enhanced section, which is positioned above a base, is chiseled and then is constructed into an underground structure, a foundation slab of the underground structure is arranged above the residual passive region enhanced section after chiseling, the depth range of the passive region enhanced section is smaller than that of the enclosure section, and the top elevation of the passive region enhanced section and the bottom elevation of the passive region enhanced section are respectively positioned at the upper side and the lower side of the base. According to the utility model, the underground continuous wall with the passive area reinforcement is formed by additionally arranging the passive area reinforcement section, so that the problems of large displacement deformation of the underground continuous wall, more disturbance of conventional soil body reinforcement of the passive area in the pit and long construction period in the excavation process of the foundation pit are solved.
Description
Technical Field
The utility model belongs to the technical field of building construction, and particularly relates to a passive area enhanced underground continuous wall structure.
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 an environmental protection and high efficiency containment system with low disturbance and high bearing capacity becomes a subject in front of engineering technicians.
SUMMERY OF THE UTILITY MODEL
The utility model provides a passive region reinforced underground continuous wall structure based on the bulging shape lateral deformation form of a soft soil foundation pit underground continuous wall, breaks through the form of the groove section of the conventional underground continuous wall, enables the groove section of the underground continuous wall to be composed of an enclosure section arranged along the side line of the foundation pit and a passive region reinforced section which is perpendicular to the enclosure section and connected with the enclosure section, and the passive region reinforced section plays a role in reinforcing the passive region of the foundation pit to form the underground continuous wall with the passive region reinforcement.
In order to solve the technical problems, the utility model provides the following technical scheme:
the utility model provides a passive district enhancement mode underground continuous wall structure, includes enclosure section and passive district reinforcing section, and enclosure section sets up along the foundation ditch sideline, passive district reinforcing section perpendicular to enclosure section sets up to be connected with enclosure section, the part that lies in the basement top on the passive district reinforcing section chisels out the back and constructs underground structure, and the foundation slab of underground structure sets up in the top of the remaining passive district reinforcing section after chiseling out, the depth range of passive district reinforcing section is less than enclosure section, the top elevation of passive district reinforcing section and the bottom elevation of passive district reinforcing section are located the upper and lower both sides of basement respectively, top elevation and bottom elevation before the passive district reinforcing section chisels out are located the both sides of warping peak value respectively, the top elevation of passive district reinforcing section chiseling out is located the deformation value on the lateral deformation curve of underground continuous wall and is 1/2 ~ 2/3 department corresponding depth range of lateral deformation maximum, and the bottom elevation of the passive region reinforcing section is positioned in a depth range corresponding to 1/2-2/3 positions where the deformation value on the lateral deformation curve of the underground diaphragm wall is the maximum lateral deformation value.
Preferably, in the passive area enhanced underground continuous wall structure, the vertical length range and the transverse length of the passive area enhanced section need to meet the calculation requirement of the passive area reinforcement of the foundation pit.
Preferably, in the above-mentioned reinforced underground diaphragm wall structure of passive zone, the enclosure section includes a corner section and a strip section, and the reinforced section of passive zone is vertically arranged at the inner side of a part of the strip section as required.
Preferably, in the passive area enhanced underground continuous wall structure, the length of the passive area enhanced section is 1-1.5 times of the length of the strip-shaped section, and the width of the passive area enhanced section is 1-1.5 times of the width of the strip-shaped section.
Preferably, in the reinforced underground continuous wall structure of the passive zone, the enclosure section is a reinforcing bar section.
Preferably, in the passive zone reinforced underground continuous wall structure, the passive zone reinforced section is a plain concrete section.
Preferably, in the passive area reinforced underground continuous wall structure, the enclosure section and the passive area reinforced section are constructed by measurement setting-out, wall guide construction, underground wall grooving, foundation cleaning, reinforcement cage hoisting and underwater concrete pouring.
Preferably, in the above-mentioned passive region reinforced underground continuous wall structure, the passive region reinforced section and the enclosure section are connected by 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 utility model has the following beneficial effects:
the utility model discloses a passive region enhanced underground continuous wall structure, which adopts an enclosure section and a passive region enhanced section, wherein the enclosure section is arranged along the side line of a foundation pit, the passive region enhanced section is perpendicular to the enclosure section and is connected with the enclosure section, the part of the passive region enhanced section, which is positioned above a base, is chiseled and then is constructed into an underground structure, a foundation slab of the underground structure is arranged above the residual passive region enhanced section after chiseling, the depth range of the passive region enhanced section is smaller than that of the enclosure section, and the top elevation of the passive region enhanced section and the bottom elevation of the passive region enhanced section are respectively positioned at the upper side and the lower side of the base. 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 overall rigidity of the underground continuous wall is greatly increased by adding the passive region reinforcing section, the strength and the horizontal bearing capacity of the passive region of the foundation pit are improved, the action of bending moment is reduced, the internal force distribution of the structure is improved, the deformation of the foundation pit can be effectively reduced, the stability of the foundation pit is improved, and the thickness and the insertion depth of the enclosing section of the underground continuous wall are reduced. 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, 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.
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 typical longitudinal section of the passive zone reinforced underground diaphragm wall structure of the present invention.
Fig. 3 is a cross-section of a typical channel section of the passive zone reinforced underground diaphragm wall structure of the present invention.
FIG. 4 is a schematic depth range diagram of the passive zone enhancement section of the present invention.
Fig. 5 is a schematic cross-sectional view of a first working condition in a construction method of a passive zone reinforced underground continuous wall structure.
Fig. 6 is a schematic cross-sectional view of a second working condition in a construction method of a passive zone reinforced underground continuous wall structure.
Fig. 7 is a schematic cross-sectional view of a working condition three in a construction method of a passive zone reinforced underground continuous wall structure.
Fig. 8 is a schematic cross-sectional view of a working condition four in the construction method of the passive zone reinforced underground continuous wall structure.
Fig. 9 is a schematic cross-sectional view of a working condition five in a construction method of a passive zone reinforced underground continuous wall structure.
Fig. 10 is a schematic cross-sectional view of a sixth working condition in a construction method of a passive zone reinforced underground continuous wall structure.
Fig. 11 is a schematic cross-sectional view of a passive zone reinforced underground diaphragm wall structure after six working conditions in a construction method.
In the figure: the concrete slab comprises a support section 1, a corner section 1A, a strip section 1B, a passive region reinforcing section 2, a connecting steel bar 3, a base 4, a horizontal support 5, a foundation slab 6 and a basement floor 7.
Detailed Description
The utility model 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 embodiments illustrated in the accompanying drawings. 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.
Please refer to fig. 1 to 11, this embodiment discloses a passive zone enhanced underground continuous wall structure, which includes an enclosure section 1 and a passive zone enhanced section 2, wherein the enclosure section 1 is disposed along a side line of a foundation pit, the passive zone enhanced section 2 is disposed perpendicular to the enclosure section 1 and is connected to the enclosure section 1, the enclosure section 1 includes a corner section 1A and a strip section 1B, the passive zone enhanced section 2 is vertically disposed on an inner side of one of the strip sections 1B as required, a portion of the passive zone enhanced section 2 located above a foundation 4 is chiseled to construct an underground structure, a foundation slab 6 of the underground structure is disposed above the passive zone enhanced section 2, a depth range of the passive zone enhanced section 2 is smaller than that of the enclosure section 1, a top elevation of the passive zone enhanced section 2 and a bottom elevation of the passive zone enhanced section 2 are respectively located on upper and lower sides of the foundation 4.
The utility model discloses a passive region enhanced underground continuous wall structure, which adopts an enclosure section 1 and a passive region enhanced section 2, wherein the enclosure section 1 is arranged along the side line of a foundation pit, the passive region enhanced section 2 is arranged perpendicular to the enclosure section 1 and is connected with the enclosure section 1, the part of the passive region enhanced section 2 above a substrate 4 is chiseled off and then an underground structure is constructed, a foundation bottom plate 6 of the underground structure is arranged above the passive region enhanced section 2, the depth range of the passive region enhanced section 2 is smaller than that of the enclosure 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 the substrate 4. 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 overall rigidity of the underground continuous wall is greatly increased by adding the passive region reinforcing section 2, the horizontal bearing capacity of the passive region is improved, the action of bending moment is reduced, the internal force distribution of the structure is improved, the deformation of the foundation pit can be effectively reduced, the stability of the foundation pit is improved, and the thickness and the insertion depth of the enclosure section 1 of the underground continuous wall are reduced. 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 passive area enhanced underground continuous wall structure, the enclosure section 1 is a reinforcement section, and reinforcement and depth of the enclosure section are set according to calculation, and the requirements of foundation pit soil retaining and water stopping are met. The passive area reinforcing section 2 is a plain concrete section. The adoption of plain concrete without preparing reinforcing steel bars can facilitate the chiseling of the base 4, namely the part above the base, on the reinforced section 2 of the passive area in the later period.
Preferably, in foretell passive zone enhancement mode underground continuous wall structure, passive zone enhancement section 2 depth range is in the certain range of basement 4 above certain range to the certain range below basement 4, and passive zone enhancement section 2 top elevation is less than envelope section 1 top elevation, and passive zone enhancement section 2 bottom elevation is higher than envelope section 1 bottom elevation, and passive zone enhancement section 2's vertical length scope and horizontal length size must satisfy the reinforced calculation requirement of foundation ditch passive zone.
Preferably, in the passive area reinforced underground continuous wall structure, 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.
Preferably, in foretell passive zone enhancement mode underground continuous wall structure, top elevation and bottom elevation before 2 chisels of passive zone enhancement section are located the both sides of warping the peak value respectively, top elevation before 2 chisels of passive zone enhancement section is located the deformation value that underground continuous wall lateral deformation curve is 1/2 ~ 2/3 department that lateral deformation is most worth corresponds in the depth range, the deformation value that the bottom elevation of passive zone enhancement section 2 is located underground continuous wall lateral deformation curve is the most worth 1/2 ~ 2/3 department of lateral deformation is corresponding in the depth range to the realization has better passive zone reinforcing effect under the prerequisite of using same size passive zone enhancement section 2.
Preferably, in the above-mentioned passive zone enhanced underground continuous wall structure, the ceiling height of the passive zone enhanced section 2 before chiseling off is located at the horizontal position corresponding to the position 1/2 with the highest lateral deformation value on the lateral deformation curve of the underground continuous wall above the base 4, and the bottom height of the passive zone enhanced section 2 is located at the horizontal position corresponding to the position 1/2 with the highest lateral deformation value on the lateral deformation curve of the underground continuous wall below the base 4, so that the passive zone enhanced underground continuous wall structure has a better passive zone enhancing effect.
Preferably, in foretell passive zone enhancement mode underground continuous wall structure, passive zone enhancement section 2 depth range is in the certain range of basement 4 above certain range to the certain range below basement 4, and passive zone enhancement section 2 top elevation is less than envelope section 1 top elevation, and passive zone enhancement section 2 bottom elevation is higher than envelope section 1 bottom elevation, and passive zone enhancement section 2's vertical length scope and horizontal length size must satisfy the reinforced calculation requirement of foundation ditch passive zone. In this embodiment, the length of the passive region enhancement section 2 is 1 to 1.5 times the length of the strip-shaped section 1B, and the width of the passive region enhancement section 2 is 1 to 1.5 times the width of the strip-shaped section 1B, so that the required passive region enhancement effect is satisfied under the passive region enhancement section 2 as small as possible.
The construction method of the reinforced underground continuous wall structure of the passive area comprises 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 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, and the top elevation of the passive area reinforcing section 2 and the bottom elevation of the passive area reinforcing section 2 are respectively positioned at the upper side and the lower side of a substrate 4;
working conditions are as follows: excavating from top to bottom layer by layer, and constructing horizontal supports 5 layer by layer until excavating to the 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.
According to the utility model, by additionally arranging the passive region reinforcing section 2, the overall rigidity of the underground continuous wall is greatly increased, the horizontal bearing capacity of the passive region is improved, the action of bending moment generation is reduced, the internal force distribution of the structure is improved, the deformation of the foundation pit can be effectively reduced, the stability of the foundation pit is increased, and the thickness and the insertion depth of the enclosure section 1 of the underground continuous wall are reduced. 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.
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 (8)
1. The utility model provides a passive zone enhancement mode underground continuous wall structure, its characterized in that, including enclosure section and passive zone reinforcing section, enclosure section sets up along foundation ditch sideline, passive zone reinforcing section perpendicular to enclosure section sets up to be connected with enclosure section, the part that lies in the basement top on the passive zone reinforcing section chisels out the back and constructs underground structure, and underground structure's foundation plate sets up in the top of chiseling out the remaining passive zone reinforcing section of back, the depth range of passive zone reinforcing section is less than enclosure section, the top elevation of passive zone reinforcing section and the bottom elevation of passive zone reinforcing section are located the upper and lower both sides of basement respectively, top elevation and bottom elevation before the passive zone reinforcing section chisels out are located the both sides of warping peak value respectively, the top elevation height before the passive zone reinforcing section chisels out is located underground continuous wall lateral deformation curve deformation value is 1/2 ~ 2/3 department corresponding depth range of lateral deformation maximum, and the bottom elevation of the passive region reinforcing section is positioned in a depth range corresponding to 1/2-2/3 positions where the deformation value on the lateral deformation curve of the underground diaphragm wall is the maximum lateral deformation value.
2. The passive area enhanced underground continuous wall structure as claimed in claim 1, wherein the vertical length range and the transverse length of the passive area enhanced section are required to meet the calculation requirement of the passive area reinforcement of the foundation pit.
3. The passive-zone-reinforced underground diaphragm wall structure of claim 2, wherein the enclosure section comprises a corner section and a strip section, and the passive-zone-reinforced section is vertically arranged at the inner side of a part of the strip section according to the requirement.
4. The passive-zone-reinforced underground diaphragm wall structure as claimed in claim 3, wherein the length of the passive-zone-reinforced section is 1 to 1.5 times the length of the strip-shaped section, and the width of the passive-zone-reinforced section is 1 to 1.5 times the width of the strip-shaped section.
5. The passive-zone-enhanced underground diaphragm wall structure of claim 1, wherein the enclosure section is a reinforcement section.
6. The passive-zone-reinforced underground diaphragm wall structure of claim 1, wherein the passive-zone-reinforcing section is a plain concrete section.
7. The passive zone-reinforced underground diaphragm wall structure of claim 1, wherein the enclosure section and the passive zone-reinforced section are constructed by measurement and setting-out, guide wall construction, underground wall grooving, foundation cleaning, steel reinforcement cage hanging and underwater concrete pouring.
8. The passive zone reinforced underground diaphragm wall structure of claim 1, wherein the passive zone reinforcing section is connected with the enclosure section through connecting steel bars, and the connecting steel bars meet anchoring requirements.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122197113.3U CN216041203U (en) | 2021-09-10 | 2021-09-10 | Passive area enhancement mode underground continuous wall structure |
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| CN202122197113.3U CN216041203U (en) | 2021-09-10 | 2021-09-10 | Passive area enhancement mode underground continuous wall structure |
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| CN216041203U true CN216041203U (en) | 2022-03-15 |
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| CN202122197113.3U Active CN216041203U (en) | 2021-09-10 | 2021-09-10 | Passive area enhancement mode underground continuous wall structure |
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