CN210263015U - Prefabricated wall unit for underground continuous wall - Google Patents
Prefabricated wall unit for underground continuous wall Download PDFInfo
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- CN210263015U CN210263015U CN201920656587.XU CN201920656587U CN210263015U CN 210263015 U CN210263015 U CN 210263015U CN 201920656587 U CN201920656587 U CN 201920656587U CN 210263015 U CN210263015 U CN 210263015U
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Abstract
The utility model discloses a prefabricated wall unit for underground continuous wall belongs to construction technical field. The technical scheme is as follows: the utility model provides a prefabricated wall unit for underground continuous wall, wherein, includes precast concrete component, pours the steel reinforcement cage of an organic whole with precast concrete component, respectively with steel reinforcement cage mutual fixed connection, corresponding pouring in precast concrete component both ends, and equal flush first stagnant water steel sheet and second stagnant water steel sheet such as height with precast concrete component respectively to and can dismantle the baffle that sets up in a tip of precast concrete component, be on a parallel with precast concrete component's terminal surface, and equal height with precast concrete component. The utility model has the advantages that: the utility model provides a pair of a prefabricated wall body unit for underground continuous wall can regard as permanent structure to use, extravagant reduction, low cost, efficiency of construction height, pour the high quality.
Description
Technical Field
The utility model relates to a construction technical field, in particular to a prefabricated wall unit for underground continuous wall.
Background
With the large-scale subway engineering construction of cities in China, the underground diaphragm wall is widely applied to subway construction. The underground continuous wall adopts the segmental pouring construction, namely, a groove section of the underground continuous wall is dug firstly, then a reinforcement cage is placed downwards, concrete is poured, and the construction of the next underground continuous wall is carried out after the underground continuous wall reaches a certain strength. In order to meet the construction method and ensure the connection requirement of two adjacent underground continuous walls, an underground continuous wall joint needs to be arranged at the joint of the two adjacent underground continuous walls, and the existing underground continuous wall joint mainly adopts a joint pipe joint, a joint box joint, an I-shaped steel joint and the like. The working principles of the connector pipe joint and the connector box joint are approximately the same, namely, the connector pipe or the connector box is arranged at the joint of the excavated groove section and the lower un-excavated soil body, the lower un-excavated soil body is prevented from influencing the construction quality of the underground continuous wall, then concrete is poured in the excavated groove section, and the connector pipe or the connector box is pulled out after the underground continuous wall reaches certain strength. If the pulling-out time is too early, the strength of the poured underground continuous wall is insufficient, and quality accidents can be caused; if the time for pulling out is too late, it is difficult to pull out because the joint pipe or the joint box is bonded to the concrete. In addition, because slurry generally exists in the groove section, if the construction time of the next underground continuous wall is long, a layer of mud skin is attached to the joint of the poured underground continuous wall, and further the strength and the seepage-proofing performance of the joint and the continuous wall are low. When the I-steel joint is adopted, the I-steel web is easy to clamp mud, so that the seepage-proofing performance of the joint is low. In addition, the existing underground continuous wall is cast in place in the groove section, so that the structural strength is low and the seepage-proofing performance is poor.
In conclusion, the existing underground continuous wall has the problems of low structural strength and poor seepage-proofing performance, the quality of subsequent engineering is influenced, and the underground continuous wall is difficult to meet the requirement of being used as a permanent supporting structure, so the underground continuous wall can only be used as temporary support. Due to the fact that the construction process of the underground continuous wall is complex, the construction cost is high, and the underground continuous wall is used as a temporary supporting structure to cause great waste.
How to solve the above technical problems is the subject faced by the present invention.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a can regard as permanent structure to use, extravagant reduce, low cost, efficiency of construction is high, pour the high prefabricated wall body unit who is used for underground continuous wall of quality.
In order to realize the purpose of the utility model, the utility model provides a prefabricated wall unit for underground continuous wall, which is characterized in that the prefabricated wall unit comprises a prefabricated concrete component, a reinforcement cage which is integrally cast with the prefabricated concrete component and is fixedly connected with the reinforcement cage respectively, a first water stop steel plate and a second water stop steel plate which are correspondingly cast at two ends of the prefabricated concrete component and are flush with the prefabricated concrete component in height respectively, and a baffle which is detachably arranged at one end part of the prefabricated concrete component, is parallel to the end surface of the prefabricated concrete component and is equal to the prefabricated concrete component in height;
one side plate of the first water stop steel plate and one side plate of the second water stop steel plate are respectively attached to the outer side surface of the precast concrete component, and the end surfaces of the first water stop steel plate and the second water stop steel plate extend to the end surface of the precast concrete component slightly exceeding the end where the first water stop steel plate and the second water stop steel plate are located;
the precast concrete member comprises a groove-shaped member with an internal cavity formed in the middle of the top surface and a joint which is arranged on one end surface of the groove-shaped member, is flush with the groove-shaped member in height and is provided with a cavity at the joint in the middle of the end part of the top surface; the outer side surfaces of the two side walls of the joint are respectively in the same plane with the outer side surface of the groove-shaped component on the same side;
the baffle is arranged between the open ends of the joints;
the first water stop steel plate and the baffle are at the same end.
The utility model discloses a concrete characteristics are still, connect the corresponding slot of respectively offering of inside wall of open end, the both ends of baffle respectively with the mutual sliding fit of slot.
The utility model discloses a concrete feature still, each the inside wall of slot respectively is equipped with a set of pulley, the both ends of baffle respectively with the mutual sliding fit of pulley is convenient for extract of baffle.
The utility model discloses a concrete feature is still, the cross section of first stagnant water steel sheet with the cross section of second stagnant water steel sheet sets up to the L type respectively, its other curb plate with precast concrete component pours as an organic wholely.
The utility model discloses a concrete characteristics are in addition, be equipped with the concave-convex face on precast concrete component's the inside wall and the terminal surface for increase and cast in situ concrete's area of contact increases the firm degree of bonding.
The utility model discloses a concrete features still, the surface of baffle scribbles the butter, in order to reduce the baffle with frictional force between the prefabricated wall body unit is convenient for extract of baffle.
The utility model discloses a concrete characteristics still, a prefabricated wall body unit for underground continuous wall ties up muscle, formwork in the mill in advance, pours, the process prefabrication such as maintenance forms, and its structural strength, surface smoothness and barrier propterty are higher, can regard as the requirement that permanent structure used, can avoid the dispersion of resources such as material, electric power to use in the concentrated production of mill moreover, and the waste reduces low cost.
The construction method for preparing the underground continuous wall by adopting the prefabricated wall units for the underground continuous wall comprises the following steps:
the method comprises the following steps: excavating a groove section;
step two: installing the baffle between the joints and flush with the joints;
step three: the prefabricated wall units for the underground continuous wall are placed in the dug groove sections, due to the fact that slurry is in the groove sections, when the prefabricated wall units for the underground continuous wall are placed to a certain height, the prefabricated wall units cannot be placed continuously due to self weight, the cast-in-place concrete is poured into the inner cavities of the groove-shaped members, water is filled into the cavities at the joints in the baffle plates, and the prefabricated wall units for the underground continuous wall are placed to a designed elevation;
step four: continuing to pour the cast-in-place concrete into the interior cavity of the channel member while continuing to fill water into the joint cavity until the cast-in-place concrete reaches a design height;
step five: continuously excavating a groove section continuous with the previous groove section at the end part close to the joint of the previous prefabricated wall body unit for the underground continuous wall;
step six: pulling out a baffle plate in the previous prefabricated wall unit for the underground continuous wall, and aligning a second water stop steel plate in the next prefabricated wall unit for the underground continuous wall with a first water stop steel plate in the previous prefabricated wall unit for the underground continuous wall;
step seven: repeating the third step to the sixth step, and stopping repeating the fifth step and the sixth step when the length of the underground continuous wall reaches the design length after the fourth step is finished;
step eight: after the foundation ditch excavation, clear up adjacent two first stagnant water steel sheet with silt on the second stagnant water steel sheet lateral surface, with the connecting plate respectively with first stagnant water steel sheet with the second stagnant water steel sheet carries out fixed connection, preferably, the connecting plate with equal height flushes at first stagnant water steel sheet, simultaneously, the connecting plate respectively with first stagnant water steel sheet with second stagnant water steel sheet is connected through full weld, can improve by a wide margin the intensity and the prevention of seepage performance of joint department.
In addition, adjacent two be used for the prefabricated wall body unit of underground continuous wall the horizontal reinforcing bar of steel reinforcement cage is staggered mutually and is arranged, and when adjacent two when being connected, the later one in the prefabricated wall body unit for underground continuous wall, with the second stagnant water steel sheet is with the horizontal reinforcing bar in steel reinforcement cage middle part, stretch into the previous one in the joint of the prefabricated wall body unit for underground continuous wall, with the horizontal reinforcing bar in the joint is staggered mutually and is arranged.
The utility model has the advantages that: the prefabricated wall unit is arranged, the structural strength, the surface flatness and the seepage-proofing performance are higher, the prefabricated wall unit can be used as a requirement for a permanent structure, the centralized production in a factory can avoid the dispersed use of resources such as materials, electric power and the like, the waste is reduced, the cost is low, and the construction efficiency of the prefabricated wall unit for preparing the prefabricated wall unit for the underground continuous wall by using the prefabricated wall unit is high; the cast-in-place concrete is cast in the inner cavity of the groove-shaped member, so that the cast-in-place concrete casting quality can be ensured, the requirement of using the prefabricated wall unit for the underground continuous wall as a permanent structure is met, and waste is avoided; the baffle plate is arranged, so that the influence of un-excavated soil body of the next section on the construction quality of the joint of the next section can be prevented, the structural strength and the anti-seepage performance of the joint can be ensured, meanwhile, water is injected into the cavity of the joint in the baffle plate during pouring, the contact between slurry and the inner wall of the joint groove can be reduced, the inner wall of the joint groove is not easy to adhere to mud skin, and the pouring quality of concrete in the joint groove is ensured; the inner side wall of the slot is provided with the slot with the pulley, so that the baffle can be conveniently pulled out; set up concave-convex face for increase and cast in situ concrete's area of contact, increase the firm degree of bonding.
Drawings
Fig. 1 is a schematic top view of the present invention.
Fig. 2 is a schematic view of the overlooking structure of the underground continuous wall body prepared by the utility model.
Fig. 3 is a schematic cross-sectional structure view of the underground continuous wall prepared by the utility model.
Wherein the reference numerals are: 1. a channel member; 2. a reinforcement cage; 3. a joint; 4. prefabricating a concrete member; 5. a baffle plate; 6. an interior cavity; 7. a cavity at the joint; 8. a first water stop steel plate; 9. a second water stop steel plate; 10. a pulley; 11. a concave-convex surface; 12. a connecting plate; 13. and (5) casting concrete in situ.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
Referring to fig. 1 to 3, the embodiment of the present invention provides a prefabricated wall unit for an underground diaphragm wall, which can be used as a permanent structure, has reduced waste, low cost, high construction efficiency and high casting quality.
In order to realize the purpose of the utility model, the utility model provides a prefabricated wall unit for underground continuous wall, which is characterized in that the prefabricated wall unit comprises a prefabricated concrete component 4, a reinforcement cage 2 which is integrally poured with the prefabricated concrete component 4 and is fixedly connected with the reinforcement cage 2, a first water stop steel plate 8 and a second water stop steel plate 9 which are correspondingly poured at two ends of the prefabricated concrete component 4 and are flush with the prefabricated concrete component 4 in height respectively, and a baffle 5 which is detachably arranged at one end part of the prefabricated concrete component 4, is parallel to the end surface of the prefabricated concrete component 4 and is equal to the prefabricated concrete component 4 in height;
one side plate of the first water stop steel plate 8 and one side plate of the second water stop steel plate 9 are respectively attached to the outer side surface of the precast concrete member 4, and the end surfaces of the first water stop steel plate and the second water stop steel plate extend to the end surface of the precast concrete member 4 slightly exceeding the end where the first water stop steel plate and the second water stop steel plate are located;
the precast concrete member 4 comprises a groove-shaped member 1 with an internal cavity 6 arranged in the middle of the top surface and a joint 3 which is arranged on one end surface of the groove-shaped member 1, is flush with the groove-shaped member 1 in height and has a cavity 7 at the joint arranged in the middle of the end part of the top surface; the outer side surfaces of two side walls of the joint 3 are respectively in the same plane with the outer side surface of the groove-shaped component 1 on the same side;
the baffle 5 is arranged between the open ends of the joints 3;
the first water stop steel plate 8 is at the same end as the baffle 5.
The utility model discloses a concrete characteristics also, the inside wall that connects 3 open ends is corresponding respectively to set up a slot, and the both ends of baffle 5 respectively with the mutual sliding fit of slot.
The utility model discloses a concrete feature still, the inside wall of each slot respectively is equipped with a set of pulley 10, and the both ends of baffle 5 respectively with the mutual sliding fit of pulley 10, the extraction of the baffle of being convenient for.
The utility model discloses a concrete feature still, the cross section of first stagnant water steel sheet 8 and the cross section of second stagnant water steel sheet 9 set up to the L type respectively, and it is as an organic whole pour with precast concrete component 4 to another curb plate.
The utility model discloses a concrete feature is equipped with unsmooth face 11 on precast concrete component 4's the inside wall and the terminal surface in addition for increase and cast in situ concrete's area of contact increases the firm degree of bonding.
The utility model discloses a concrete feature still, the surface of baffle 5 scribbles the butter to reduce the frictional force between baffle and the prefabricated wall body unit, be convenient for extract of baffle.
The utility model discloses a concrete characteristics is in addition, and a prefabricated wall body unit for underground continuous wall ties up muscle, formwork in the mill in advance, pours, the process prefabrication such as maintenance forms, and its structural strength, surface smoothness and barrier propterty are higher, can regard as the requirement that permanent structure used, can avoid the dispersion of resources such as material, electric power to use in the concentrated production of mill moreover, and the waste reduces low cost.
Adopt the utility model provides a construction method that is used for underground continuous wall's prefabricated wall body unit preparation underground continuous wall, including following step:
the method comprises the following steps: excavating a groove section;
step two: installing the baffle 5 between the joints 3 and leveling with the joints 3;
step three: placing the prefabricated wall units for the underground continuous wall in the dug groove section, placing the prefabricated wall units for the underground continuous wall to a certain height by virtue of the self weight of the prefabricated wall units when the prefabricated wall units for the underground continuous wall are placed to a certain height due to slurry in the groove section, pouring cast-in-place concrete 13 into the inner cavity 6 of the groove-shaped member 1, filling water into the cavity 7 at the joint in the baffle 5, and placing the prefabricated wall units for the underground continuous wall to a designed elevation;
step four: continuously pouring cast-in-place concrete 13 into the inner cavity 6 of the groove-shaped member 1, and simultaneously continuously filling water into the cavity 7 at the joint in the baffle 5 until the cast-in-place concrete 13 reaches the designed height;
step five: continuously excavating a groove section continuous with the previous groove section at the end part close to the joint 3 of the previous prefabricated wall unit for the underground continuous wall;
step six: pulling out a baffle 5 in the previous prefabricated wall unit for the underground continuous wall, and aligning a second water stop steel plate 9 in the next prefabricated wall unit for the underground continuous wall with a first water stop steel plate 8 in the previous prefabricated wall unit for the underground continuous wall;
step seven: repeating the third step to the sixth step, and stopping repeating the fifth step and the sixth step when the length of the underground continuous wall reaches the design length after the fourth step is finished;
step eight: after the foundation pit is excavated, silt on the outer side surfaces of two adjacent first water stop steel plates 8 and second water stop steel plates 9 is cleaned, the connecting plates 12 are fixedly connected with the first water stop steel plates 8 and the second water stop steel plates 9 respectively, preferably, the connecting plates 12 are flush with the first water stop steel plates 8 at the same height, and meanwhile, the connecting plates 12 are connected with the first water stop steel plates 8 and the second water stop steel plates 9 through full welding, so that the strength and the seepage-proofing performance of joints can be greatly improved.
In addition, the transverse steel bars of the steel reinforcement cages 2 of two adjacent prefabricated wall units for the underground continuous wall are arranged in a staggered mode, when the head end and the tail end of the two adjacent prefabricated wall units for the underground continuous wall are connected, the rear prefabricated wall unit for the underground continuous wall is provided with the transverse steel bars in the middle of the steel reinforcement cage 2 at the same end as the second water stop steel plate 9, the transverse steel bars stretch into the joint 3 of the front prefabricated wall unit for the underground continuous wall, and the transverse steel bars in the joint 3 are arranged in a staggered mode.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. A prefabricated wall unit for an underground continuous wall is characterized by comprising a prefabricated concrete component (4), a reinforcement cage (2) which is integrally cast with the prefabricated concrete component (4), a first water stop steel plate (8) and a second water stop steel plate (9) which are fixedly connected with the reinforcement cage (2) respectively, are correspondingly cast at two ends of the prefabricated concrete component (4) and are flush with the prefabricated concrete component (4) in height respectively, and a baffle (5) which is detachably arranged at one end part of the prefabricated concrete component (4), is parallel to the end surface of the prefabricated concrete component (4) and is flush with the prefabricated concrete component (4) in height;
one side plate of the first water stop steel plate (8) and one side plate of the second water stop steel plate (9) are respectively attached to the outer side surface of the precast concrete component (4), and the end surface of each of the first water stop steel plate and the second water stop steel plate extends to the end surface of the precast concrete component (4) slightly exceeding the end where the end surface of the precast concrete component is located;
the precast concrete member (4) comprises a groove-shaped member (1) with an internal cavity (6) formed in the middle of the top surface and a joint (3) which is arranged on one end surface of the groove-shaped member (1), is flush with the groove-shaped member (1) in height and is provided with a cavity (7) at the joint in the middle of the end part of the top surface; the outer side surfaces of two side walls of the joint (3) are respectively in the same plane with the outer side surface of the groove-shaped component (1) on the same side;
the baffle (5) is arranged between the open ends of the joints (3);
the first water stop steel plate (8) and the baffle (5) are at the same end.
2. Prefabricated wall unit for underground diaphragm walls according to claim 1, characterized in that the inner side walls of the open ends of the joints (3) are provided with a slot respectively, and the two ends of the baffles (5) are slidably fitted with the slots respectively.
3. Prefabricated wall unit for underground diaphragm walls according to claim 2, characterized in that the inner side wall of each slot is provided with a set of pulleys (10), and the two ends of the baffle (5) are respectively in sliding fit with the pulleys (10).
4. The prefabricated wall unit for an underground continuous wall according to claim 1, wherein the cross section of the first water stop steel plate (8) and the cross section of the second water stop steel plate (9) are respectively arranged in an L shape, and the other side plate of the first water stop steel plate and the second water stop steel plate are cast into a whole with the prefabricated concrete member (4).
5. Prefabricated wall unit for an underground diaphragm wall according to claim 1, characterised in that the prefabricated concrete elements (4) are provided with a relief surface (11) on the inner side walls and the end surfaces.
6. Prefabricated wall unit for underground diaphragm walls according to any of claims 1-5, characterized in that the surface of the baffles (5) is coated with butter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920656587.XU CN210263015U (en) | 2019-05-09 | 2019-05-09 | Prefabricated wall unit for underground continuous wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920656587.XU CN210263015U (en) | 2019-05-09 | 2019-05-09 | Prefabricated wall unit for underground continuous wall |
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| CN210263015U true CN210263015U (en) | 2020-04-07 |
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| CN201920656587.XU Active CN210263015U (en) | 2019-05-09 | 2019-05-09 | Prefabricated wall unit for underground continuous wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605369A (en) * | 2021-08-24 | 2021-11-05 | 中国建设基础设施有限公司 | Underground continuous wall and construction method thereof |
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- 2019-05-09 CN CN201920656587.XU patent/CN210263015U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605369A (en) * | 2021-08-24 | 2021-11-05 | 中国建设基础设施有限公司 | Underground continuous wall and construction method thereof |
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