CN210482371U - Pipe gallery system that multistage support and major structure combined together - Google Patents
Pipe gallery system that multistage support and major structure combined together Download PDFInfo
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- CN210482371U CN210482371U CN201920693140.XU CN201920693140U CN210482371U CN 210482371 U CN210482371 U CN 210482371U CN 201920693140 U CN201920693140 U CN 201920693140U CN 210482371 U CN210482371 U CN 210482371U
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Abstract
The utility model belongs to the technical field of ground and foundation engineering construction, a pipe gallery system that multistage support combined together with major structure is disclosed, including two rows of first order underground continuous walls and two rows of second level underground continuous walls, set up the cast-in-place bottom plate of first order between the first order underground continuous wall of homonymy and the second level underground continuous wall, set up the cast-in-place bottom plate of second level between two rows of second level underground continuous walls, set up cast-in-place roof between two rows of first order underground continuous walls. Therefore, the first-level underground continuous wall, the second-level underground continuous wall, the first-level cast-in-place bottom plate, the second-level cast-in-place bottom plate and the cast-in-place top plate jointly form a pipe gallery system. The utility model discloses regard as the pipe gallery lateral wall with the underground continuous wall of excavation supporting adoption to reduce work load, material saving and cost, and multistage supporting helps alleviateing the pipe gallery and subside for a long time, helps improving pipe gallery anti-seismic performance, reduces backfill and reduces the construction volume, has also balanced the contradiction between atress and the space utilization better.
Description
Technical Field
The utility model belongs to the technical field of foundation and foundation engineering construction, specific theory relates to a novel piping lane system.
Background
With the rapid development of economy in China, the urbanization rate is greatly improved, the existing urban infrastructure is out of step with urban development, and the construction of the comprehensive pipe gallery becomes very important under the condition. The structural design service life of the comprehensive pipe gallery engineering is determined according to the reasonable service life of a permanent structure and is not suitable to be less than 100 years. But in the in-service use, long-term subside can make piping lane joint department easy to take place the seepage, and the infiltration can make the piping lane accelerate to subside again, influences the durability. In addition, the pipe gallery is also easily damaged under the action of an earthquake, and once the pipe gallery is buried underground, great economic loss is caused. Therefore, for the construction of the pipe gallery, how to balance the cost, the stress, the space utilization rate and the durability is very important.
At present, the cross section form of a comprehensive pipe gallery and the pipe gallery system can be divided into a circular section form and a box section form according to the property, the capacity, the geology, the terrain condition and the construction mode of a contained pipeline. The conventional circular cross section and the conventional rectangular cross section have respective advantages, but all aspects are difficult to balance, which is mainly represented by the following aspects:
firstly, in soft soil areas, shallow pipe galleries are constructed by open excavation. The conventional circular and rectangular section pipe gallery is firstly supported by vertical piles and then excavated, the inner supports are arranged while excavating, the inner supports are removed after the pipe gallery is installed, and finally soil is backfilled. The inner support installation consumes huge manpower and material resources, but only plays a role in the construction process, and the effect is not obvious in the use process.
Secondly, the circular cross section pipe gallery has advantages in the aspect of stress performance, but has low space utilization rate, large influence range and low construction speed.
Thirdly, compared with a circular section, the pipe gallery with the rectangular section has the advantages of high space utilization rate, small influence range and high construction speed; but the stress performance is poor, and the stress concentration of four corners is particularly obvious.
SUMMERY OF THE UTILITY MODEL
The utility model discloses what the impetus was solved is conventional rectangle, circular cross section piping lane is not enough and cause long-term settlement great and the shock resistance is relatively poor to vertical supporting utilization in the use stage, and the installation of support and demolish the technical problem that can cause the cost waste in the open cut method construction, a piping lane system that multistage support and major structure combined together is provided, can be under open cut method construction conditions, regard as the piping lane lateral wall with the underground continuous wall of excavation supporting adoption, thereby reduce work load, material saving and cost, and multistage support helps alleviateing the piping lane and subside for a long time, help improving piping lane anti-seismic performance, reduce backfill and reduce the construction volume, also balanced the contradiction between atress and the space utilization better.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a pipe gallery system combining a multi-stage support with a main structure is composed of a first-stage pipe gallery and a second-stage pipe gallery, wherein the sections of the first-stage pipe gallery and the second-stage pipe gallery are rectangular, and the second-stage pipe gallery is located on the lower portion of the first-stage pipe gallery and is narrower than the first-stage pipe gallery in width;
two rows of first-stage underground continuous walls are used as the side walls of the first-stage pipe gallery, and soil between the two rows of first-stage underground continuous walls is dug out to form a first-stage foundation pit; two rows of second-level underground continuous walls with the height lower than that of the first-level underground continuous walls are arranged between the two rows of first-level underground continuous walls, the two rows of second-level underground continuous walls are used as the side walls of the second-level pipe gallery, and soil bodies between the two rows of second-level underground continuous walls are dug out to form a second-level foundation pit;
a first-stage cast-in-place bottom plate is cast in situ at the bottom of the first-stage foundation pit between the first-stage underground continuous wall and the second-stage underground continuous wall on the same side; the first-stage cast-in-place bottom plates on the left side and the right side are positioned at the same height, and the first-stage cast-in-place bottom plates form the bottom surface of the first-stage pipe gallery; a second-stage cast-in-place bottom plate is cast in situ at the bottom of the second-stage foundation pit between the two rows of second-stage underground continuous walls, and forms the bottom surface of the second-stage pipe gallery;
cast-in-place roof plates are cast between the two rows of first-stage underground continuous walls in situ, and the cast-in-place roof plates serve as the top surfaces of the first-stage pipe galleries;
therefore, the first-stage underground continuous wall, the second-stage underground continuous wall, the first-stage cast-in-place bottom plate, the second-stage cast-in-place bottom plate and the cast-in-place top plate jointly form a pipe gallery system combining a multi-stage support and a main structure.
Further, the second grade pipe gallery is located the central position of one-level pipe gallery lower part, two rows promptly the symmetry center line of second grade underground continuous wall and two rows the symmetry center line coincidence of first grade underground continuous wall.
Further, the second grade pipe gallery is used for placing water supply and drainage pipelines, and the clear distance between two sides of the placed pipelines and the distance between the pipelines and the ground are not less than 400 mm.
Furthermore, the waterproof grade of the second-stage cast-in-place bottom plate is higher than that of the first-stage cast-in-place bottom plate.
Furthermore, the connection position of the first-stage cast-in-place bottom plate, the first-stage underground continuous wall and the second-stage underground continuous wall is reinforced, and the connection position of the second-stage cast-in-place bottom plate and the second-stage underground continuous wall is reinforced.
Further, the connecting position of the cast-in-place top plate and the first-stage underground continuous wall is reinforced.
The utility model has the advantages that:
(one) the utility model discloses can realize reducing long-term the subsiding: because adopt multistage supporting, and underground continuous wall highly is greater than the pipe gallery bottom plate burial depth, in long-term use, multistage supporting has increased side frictional resistance, consequently can reduce the long-term settlement of pipe gallery, strengthens the impervious ability of pipe gallery, improves the durability of pipe gallery.
(II) the utility model discloses can realize improving piping lane anti-seismic performance: compared with the common pile, the earthquake resistance of the underground continuous wall is greatly improved, and the integrity of the pipe gallery is enhanced by adopting a cast-in-place mode for the bottom plate and the top plate; during earthquake, the bottom plate, the top plate and the underground continuous wall can move integrally, so that relative dislocation of the pipe gallery is reduced, and the damage of earthquake is reduced.
(III) the utility model discloses can realize practicing thrift the cost: because the foundation pit is supported by the underground continuous wall, the internal support is omitted, and the underground continuous wall is used as the side wall of the pipe gallery, a large amount of materials and labor cost are saved compared with the conventional pipe gallery; meanwhile, the secondary pipe gallery can be used for placing water supply pipes, water drainage pipes and the like which are easy to leak, and the functional area division is more reasonable.
Drawings
Fig. 1 is a front view of a pipe gallery system in which the multi-stage support and main structure are combined;
fig. 2 is the utility model provides a top view of the piping lane system that multistage support and major structure combined together.
In the above figures: 1-a first-level underground continuous wall, 2-a second-level underground continuous wall, 3-a first-level cast-in-place bottom plate, 4-a second-level cast-in-place bottom plate and 5-a cast-in-place top plate.
Detailed Description
The present invention is further described in detail below with reference to specific examples, which enable one skilled in the art to more fully understand the present invention without limiting the invention in any way.
As shown in fig. 1 and 2, in an area constructed by an open cut method, two rows of first-stage underground continuous walls 1 are firstly driven in, a soil layer between the two rows of first-stage underground continuous walls 1 can be dug out by an excavator after the first-stage underground continuous walls 1 are well supported, an open first-stage foundation pit is dug, then a second-stage underground continuous wall 2 is driven in, a second-stage foundation pit is dug, finally a first-stage cast-in-place bottom plate 3, a second-stage cast-in-place bottom plate 4 and a cast-in-place top plate 5 are cast in place, and soil is backfilled after maintenance is completed. The first-stage underground continuous wall 1, the second-stage underground continuous wall 2, the first-stage cast-in-place bottom plate 3, the second-stage cast-in-place bottom plate 4 and the cast-in-place top plate 5 jointly form a pipe gallery system combining a multistage support with a main structure.
The utility model discloses a multistage piping lane system that combines together with major structure of strutting, the one-level piping lane and the second grade piping lane that are the rectangle by the cross-section constitute, and the second grade piping lane is located one-level piping lane lower part position placed in the middle to the width of second grade piping lane is narrower than one-level piping lane.
Specifically, this pipe gallery system includes two rows of first level underground continuous walls 1 as one-level pipe gallery lateral wall, and the whole width of one-level pipe gallery is decided to the distance between two rows of first level underground continuous walls 1, and the height of two rows of first level underground continuous walls 1 depends on the designing requirement. And digging a soil layer between the two rows of the first-stage underground continuous walls 1 to form an open first-stage foundation pit.
Two rows of second-stage underground continuous walls 2 are arranged between the two rows of first-stage underground continuous walls 1, and the symmetrical center lines of the two rows of second-stage underground continuous walls 2 are superposed with the symmetrical center lines of the two rows of first-stage underground continuous walls 1. Two rows of second grade underground continuous walls 2 are as the lateral wall of second grade pipe gallery, and the soil layer between two rows of second grade underground continuous walls 2 is dug out, excavates into the second grade foundation ditch of open-type. The distance between two rows of second level underground continuous walls 2 determines the whole width of the secondary pipe gallery, the whole width of the secondary pipe gallery generally depends on the diameters of water supply pipelines and water discharge pipelines arranged in the secondary pipe gallery, and the clear distance between two sides of the arranged pipelines and the distance between the pipelines and the ground are not less than 400 mm. The height of the two rows of second-stage underground continuous walls 2 depends on the design requirements and usually does not exceed the height of the first-stage underground continuous walls 1.
The first-stage underground continuous wall 1 and the second-stage underground continuous wall 2 can adopt pile rows, and the strength, the rigidity, the thickness and the arrangement of settlement joints of the first-stage underground continuous wall and the second-stage underground continuous wall meet the design requirements. The height of the first-level underground continuous wall 1 and the second-level underground continuous wall 2 is controlled and adjusted according to hydrogeological conditions and the buried depth of a pipe gallery, and waterproof measures meet the specifications.
A first-stage cast-in-place bottom plate 3 is arranged between the first-stage underground continuous wall 1 on the left side and the second-stage underground continuous wall 2 and between the first-stage underground continuous wall 1 on the right side and the second-stage underground continuous wall 2, and the first-stage cast-in-place bottom plate 3 is located at the bottom of the first-stage foundation pit. The first-stage cast-in-place bottom plates 3 on the left side and the right side are at the same height and have the same width, and the first-stage cast-in-place bottom plates 3 serve as the bottom surfaces of the first-stage pipe galleries. A second-stage cast-in-place bottom plate 4 is arranged between the two second-stage underground continuous walls 2, and the second-stage cast-in-place bottom plate 4 is positioned at the bottom of the second-stage foundation pit. The second-level cast-in-place bottom plate 4 is used as the bottom surface of the second-level pipe gallery and is lower than the first-level cast-in-place bottom plate 3.
The foundation is tamped before the first-stage cast-in-place bottom plate 3 and the second-stage cast-in-place bottom plate 4 are constructed, and the strength and the thickness are controlled and adjusted according to the hydrogeological conditions and the pipe gallery burial depth. The first-stage cast-in-place bottom plate 3 and the second-stage cast-in-place bottom plate 4 adopt different waterproof measures according to different hydrogeological conditions, and the waterproof grade of the second-stage cast-in-place bottom plate 4 is higher than that of the first-stage cast-in-place bottom plate 3 by one grade; setting the settlement joints at certain intervals, and making the bottom plates on two sides of the settlement joints into tongue-and-groove type or concave-convex type. The connecting positions of the first-stage cast-in-place bottom plate 3 and the second-stage cast-in-place bottom plate 4 and the first-stage underground continuous wall 1 and the second-stage underground continuous wall 2 are reinforced, reinforced bars are required to be encrypted, and stricter waterproof measures are taken.
Be provided with cast-in-place roof 5 between two rows of first level underground continuous walls 1, cast-in-place roof 5 is as the top surface of one-level pipe gallery. The strength, rigidity and thickness of the cast-in-place roof 5 are controlled and adjusted according to hydrogeological conditions and the roof burial depth. The cast-in-place top plate 5 adopts different waterproof measures according to different hydrogeological conditions, settlement joints are arranged at intervals of a certain distance in a breaking mode, and bottom plates on two sides of the settlement joints are made into tongue-and-groove type or concave-convex type. The connecting position of the cast-in-place roof 5 and the first-level underground continuous wall 1 needs to be reinforced, reinforced bars need to be encrypted, and stricter waterproof measures are taken.
The construction method of the pipe gallery system combining the multistage support and the main structure specifically comprises the following steps:
first-stage underground diaphragm wall 1 positioning and construction
The position of the first-stage underground continuous wall 1 is determined according to the design of the pipe gallery, the burial depth and the size of the two rows of first-stage underground continuous walls 1 are estimated according to the size, the designed burial depth and the hydrogeological conditions of the pipe gallery, and finally lofting positioning is carried out.
According to the lofting line, two long and narrow deep grooves are dug under the condition of a slurry protection wall, and the grooves are cleaned after the excavation is finished. After the groove is cleaned, the steel reinforcement cage is hoisted in the groove, then underwater concrete is poured by a conduit method to build a unit groove section, and the steps are carried out section by section, and two continuous reinforced concrete walls are built underground. The joint adopts a fore shaft pipe process, namely, a steel pipe with the same diameter and groove width, namely, a fore shaft pipe is inserted in the end part of the groove section before the groove section concrete is poured.
Second and first grade foundation pit excavation
And before the primary foundation pit is excavated, setting a pipe well and a well point for dewatering. According to design requirements, primary foundation pit excavation is carried out between two rows of first-stage underground continuous walls 1, a long-arm excavator is used for excavation within 6m of a top layer, and earthwork below 6m is excavated and installed by a manpower cooperation excavator. And tamping the field after digging.
Positioning and construction of third-level and second-level underground continuous walls 2
The size of a secondary pipe gallery is determined according to the diameters of water supply pipes and water discharge pipes, the clear distance between two sides of a pipeline and the distance between the pipeline and the ground are not smaller than 400mm, and the secondary pipe gallery is arranged in the middle of the primary pipe gallery. The position of the second-level underground continuous wall 2 is determined accordingly, the burial depth and the size of the second-level underground continuous wall 2 are estimated according to the size of the pipe gallery, the designed burial depth and the hydrogeological conditions, and finally lofting positioning is carried out. And (4) after lofting is finished, constructing the second-stage underground continuous wall 2, and constructing by referring to the first-stage underground continuous wall 1 in the construction process.
Four-stage and two-stage foundation pit excavation
And before the foundation pit is excavated, setting a pipe well and a well point for dewatering. Excavate the second grade foundation ditch between two rows of second grade underground continuous walls 2, the excavation depth is the height of second grade pipe gallery. The top layer is excavated within 6m by a long-arm excavator, and the earthwork below 6m is excavated by a manpower matching with the excavator. And tamping the field after digging.
Fifthly, a first-stage cast-in-place bottom plate 3 and a second-stage cast-in-place bottom plate 4 are poured
The construction of the second-level cast-in-place bottom plate 4 is firstly carried out, the second-level underground continuous wall 2 is subjected to bar planting before the construction of the second-level cast-in-place bottom plate 4, and the second-level cast-in-place bottom plate 4 is sequentially subjected to formwork erecting, steel bar binding and pouring after the bar planting is finished. After the strength of the second-stage cast-in-place bottom plate 4 meets the design requirement, the first-stage cast-in-place bottom plate 3 is subjected to a construction process similar to that of the second-stage cast-in-place bottom plate 4. It should be noted that the construction of the waterproof measure is carried out before and after the construction of the bottom plate according to the design requirements. And reinforcing measures are taken at the joints of the first-stage cast-in-place bottom plate 3 and the second-stage cast-in-place bottom plate 4 and the first-stage underground continuous wall 1 and the second-stage underground continuous wall 2, and the concrete expression is the increase of reinforcing bars at the corners.
Sixthly, pouring the cast-in-place roof 5
And after the strength of the first-stage cast-in-place bottom plate 3 reaches the design requirement, constructing the cast-in-place top plate 5. Cast-in-place roof 5 is located between two rows of first level underground continuous walls 1 and is located one-level piping lane top. Firstly, the two rows of first-stage underground continuous walls 1 are subjected to bar planting, and after the bar planting is finished, the cast-in-place roof 5 is subjected to formwork erecting, steel bar binding and pouring in sequence. And reinforcing measures are taken at the joint of the cast-in-place top plate 5 and the first-stage underground continuous wall 1, and particularly, the reinforcement at the corner is increased.
Seventhly, backfilling
And (3) performing backfill construction on the cast-in-place top plate 5, wherein the backfill needs to meet the requirements of compactness, water content and the like, a method of layering and paving the backfill by using a shovel machine, a scraper and the like is adopted, and the thickness of each layer of paving soil is determined according to the soil quality, the compactness requirement and the performance of machines and tools. When rolling, the tracks of the wheel (tamping) are mutually overlapped to prevent pressure leakage and tamping leakage.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various changes without departing from the spirit and the scope of the invention as claimed.
Claims (6)
1. A pipe gallery system combining a multi-stage support with a main structure is characterized by comprising a first-stage pipe gallery and a second-stage pipe gallery, wherein the cross sections of the first-stage pipe gallery and the second-stage pipe gallery are rectangular, and the second-stage pipe gallery is located on the lower portion of the first-stage pipe gallery and is narrower than the first-stage pipe gallery in width;
two rows of first-stage underground continuous walls are used as the side walls of the first-stage pipe gallery, and soil between the two rows of first-stage underground continuous walls is dug out to form a first-stage foundation pit; two rows of second-level underground continuous walls with the height lower than that of the first-level underground continuous walls are arranged between the two rows of first-level underground continuous walls, the two rows of second-level underground continuous walls are used as the side walls of the second-level pipe gallery, and soil bodies between the two rows of second-level underground continuous walls are dug out to form a second-level foundation pit;
a first-stage cast-in-place bottom plate is cast in situ at the bottom of the first-stage foundation pit between the first-stage underground continuous wall and the second-stage underground continuous wall on the same side; the first-stage cast-in-place bottom plates on the left side and the right side are positioned at the same height, and the first-stage cast-in-place bottom plates form the bottom surface of the first-stage pipe gallery; a second-stage cast-in-place bottom plate is cast in situ at the bottom of the second-stage foundation pit between the two rows of second-stage underground continuous walls, and forms the bottom surface of the second-stage pipe gallery;
cast-in-place roof plates are cast between the two rows of first-stage underground continuous walls in situ, and the cast-in-place roof plates serve as the top surfaces of the first-stage pipe galleries;
therefore, the first-stage underground continuous wall, the second-stage underground continuous wall, the first-stage cast-in-place bottom plate, the second-stage cast-in-place bottom plate and the cast-in-place top plate jointly form a pipe gallery system combining a multi-stage support and a main structure.
2. The pipe rack system that multistage support and major structure combined together of claim 1, characterized in that, the second grade pipe rack is located the central position of one-level pipe rack lower part, namely two rows of the symmetry center line of second grade underground continuous wall with two rows of the symmetry center line coincidence of first grade underground continuous wall.
3. The pipe gallery system combining multi-level support and main body structure as claimed in claim 1, wherein the secondary pipe gallery is used for placing water supply and drainage pipes, and the clear distance between two sides of the placed pipes and the distance between the pipes and the ground are not less than 400 mm.
4. The pipe gallery system combining multistage support and main body structure of claim 1, wherein the waterproof grade of the second-stage cast-in-place bottom plate is higher than that of the first-stage cast-in-place bottom plate.
5. The pipe gallery system combining the multi-level support and the main body structure according to claim 1, wherein the connection position of the first-level cast-in-place bottom plate with the first-level underground continuous wall and the second-level underground continuous wall is reinforced, and the connection position of the second-level cast-in-place bottom plate with the second-level underground continuous wall is reinforced.
6. The pipe gallery system combining the multistage support and the main body structure according to claim 1, wherein a connection position of the cast-in-place top plate and the first-stage underground continuous wall is reinforced.
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