CN210562288U - Trapezoidal pipe gallery system that combines with major structure is strutted in slope - Google Patents
Trapezoidal pipe gallery system that combines with major structure is strutted in slope Download PDFInfo
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- CN210562288U CN210562288U CN201920693152.2U CN201920693152U CN210562288U CN 210562288 U CN210562288 U CN 210562288U CN 201920693152 U CN201920693152 U CN 201920693152U CN 210562288 U CN210562288 U CN 210562288U
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Abstract
The utility model belongs to the technical field of foundation and foundation engineering construction, and discloses a trapezoidal pipe gallery system combining an inclined support with a main structure, which comprises a pipe gallery main body and an inclined support, wherein the section of the pipe gallery main body is isosceles trapezoid and is formed by splicing a plurality of segments in the length direction, and each segment is a frame structure formed by splicing two to four groove-shaped duct pieces and/or folded duct pieces; the inclined support comprises inclined piles arranged on two sides of the pipe gallery main body, and cement mortar is filled between the inclined piles and two inclined side walls of the pipe gallery main body; the top of each row of the inclined piles is connected with a crown beam. The utility model combines the inclined support of the slope with the two inclined side walls of the pipe gallery with the trapezoidal section, the inclined support can reduce the stress on the side walls of the pipe gallery, help to reduce the long-term settlement of the pipe gallery and improve the anti-seismic performance of the pipe gallery, and the two inclined side walls of the trapezoidal section are coincided with the slope, thereby reducing the backfill and the construction amount; and the design of the trapezoidal section better balances the contradiction between the stress and the space utilization rate.
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 that conventional rectangle, circular cross section piping lane in the use stage to the utilization of vertical support not enough cause long-term settlement great and the shock resistance is relatively poor, and the installation of support and demolish can cause the extravagant technical problem of cost in open cut method construction, the trapezoidal piping lane system that provides a slope support and major structure combination, the slope support that will put the slope adoption combines with two oblique lateral walls in trapezoidal cross section's piping lane bottom, slope support can reduce piping lane lateral wall atress, help alleviating the piping lane subside for a long time, help improving piping lane anti-seismic performance, two oblique lateral walls in trapezoidal cross section coincide with putting the slope, can reduce backfill soil, reduce the construction volume; and the design of the trapezoidal section better balances the contradiction between the stress and the space utilization rate.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a trapezoid pipe gallery system combining an inclined support with a main structure comprises a pipe gallery main body and an inclined support;
the cross section of the pipe gallery main body is an isosceles trapezoid with the top edge larger than the bottom edge, the pipe gallery main body is formed by splicing a plurality of sections in the length direction, and each section is a frame structure formed by splicing two to four groove-shaped pipe pieces and/or folded pipe pieces;
the inclined support comprises inclined piles arranged on two sides of the pipe gallery main body, and the two rows of inclined piles are symmetrically arranged on two sides of the pipe gallery main body and are close to two inclined side walls of the pipe gallery main body; cement mortar is filled between the inclined pile and the two inclined side walls of the pipe gallery main body; the top of each row of the inclined piles is connected with a crown beam;
before the construction of the pipe gallery main body, a soil layer between two rows of inclined piles is dug out to form an open foundation pit; after the pipe gallery main body is constructed, the two oblique side walls of the pipe gallery main body and the oblique piles backfill soil.
Further, the grooved tube pieces and/or the folded tube pieces of two adjacent sections of the tube lane main body are installed in a staggered connection mode.
Further, the channel-shaped duct pieces and/or the accordion-shaped duct pieces are connected transversely and longitudinally by joint bolts.
Further, each section of the tube lane body has a length of 2-3 m.
Further, the total length of the top edge of the trapezoid of the cross section of the pipe gallery main body is 1.8-2.2 times of the total length of the bottom edge of the trapezoid.
Further, adopt waterproof rubber pad between two adjacent sections of piping lane main part.
Further, the cross-section of piping lane main part is 60 and 120 isosceles trapezoid for upper and lower base angle respectively, every festival section of piping lane main part is assembled by two different flute profile sections of jurisdiction and forms.
Further, the pile diameter of the inclined pile is 600-800 mm; the width of the crown beam is not less than the pile diameter of the inclined pile, and the height of the crown beam is not less than 0.6 time of the width of the crown beam.
The utility model has the advantages that:
(one) the utility model discloses can realize reducing long-term the subsiding: because foundation ditch support adopts the batter pile, and the batter pile inserts pipe corridor below, in long-term use, the batter pile has played the off-load effect, 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: because the pipe gallery and the batter pile are tightly attached together, and the batter pile is inserted below the pipe gallery, the pipe gallery and the batter pile can form a whole, and the batter piles on two sides form an inverted triangle approximately, so that the stability of a pipe gallery system is enhanced; during the earthquake, the pipe gallery and the batter pile move integrally, so that the relative dislocation of the pipe gallery is reduced, and the damage of the earthquake is reduced.
(III) the utility model discloses can realize practicing thrift the cost: because the foundation ditch adopts the batter pile to strut, has saved the internal stay to the batter pile is as permanent support, can share the load for the piping lane, reduces the atress of piping lane major structure lateral wall, thereby reduces work load, practices thrift the cost.
(IV) the utility model discloses a trapezoidal cross-section piping lane has balanced the contradiction between atress and the space utilization better, and the piping lane main part adopts trapezoidal cross-section, and is more flat under the same area, so the buried depth is little, cost greatly reduced.
Drawings
Fig. 1 is a front view of a trapezoidal pipe gallery system provided by an alternative embodiment of the present invention;
fig. 2 is a top view of a trapezoidal pipe gallery system provided in an alternative embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the arrangement of bolt holes of two groove-shaped duct pieces in a trapezoidal duct system according to an alternative embodiment of the present invention; (a) one of the two grooved tube pieces 3, (b) two of the two grooved tube pieces 3;
fig. 4 is a connection schematic diagram of the joint bolts in the trapezoidal pipe gallery system provided by the present invention.
In the above figures: 1-inclined pile, 2-crown beam, 3-grooved segment, 4-cement mortar and 5-joint bolt.
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 batter piles 1 are driven in, then a crown beam 2 is constructed to connect the two rows of batter piles 1 respectively, after the batter piles 1 are supported, a soil layer between the two rows of batter piles 1 is dug out by an excavator, an open foundation pit is dug, and then the ground is tamped. Then hoisting and installing the groove-shaped duct piece 3 and/or the folded duct piece, and splicing to form a trapezoidal duct body; and filling gaps between the two inclined side walls of the pipe gallery main body and the inclined piles 1 with cement mortar 4, and finally backfilling soil. From this, slot shape section of jurisdiction 3 and/or folded shape section of jurisdiction have constituted trapezoidal piping lane main part, and batter pile 1 plays the uninstallation effect to the piping lane main part.
The utility model discloses a trapezoidal piping lane system that slope was strutted and main structure combines includes that piping lane main part and slope are strutted. The cross-section of the pipe gallery main body is an isosceles trapezoid with the top edge larger than the bottom edge, and generally, the total length of the top edge of the trapezoid of the cross-section of the pipe gallery main body is 1.8-2.2 times of the total length of the bottom edge of the trapezoid. The pipe gallery main body is formed by splicing a plurality of sections in the length direction, and the length of each section is 2-3 m. Each segment of the pipe gallery main body is a trapezoidal section frame structure formed by splicing two to four groove-shaped pipe pieces 3 and/or folded pipe pieces. Two adjacent sections of the pipe gallery main body, the groove-shaped pipe piece 3 and/or the folded pipe piece are connected and installed in a staggered mode.
The groove-shaped duct pieces 3 and the folded duct pieces are prefabricated pieces, and according to the specific structural design of the main body of the trapezoidal pipe gallery, two groove-shaped duct pieces 3 can be assembled, or four folded duct pieces can be assembled, or one groove-shaped duct piece 3 and two folded duct pieces can be assembled; the groove-shaped duct piece 3 is composed of long sides, short sides and side edges which form continuous folding lines, and the folded duct piece is composed of long sides and short sides which form folding lines. Hand holes are preset on the inner side wall surface of the duct piece when the groove-shaped duct piece 3 and the folded duct piece are prefabricated, a bolt hole communicated with the section of the groove-shaped duct piece 3 or the section of the folded duct piece is reserved in each hand hole and used for transversely and longitudinally connecting the groove-shaped duct piece 3 and/or the folded duct piece through a joint bolt 5, and the arrangement direction of the joint bolt 5 is parallel to the surface of the groove-shaped duct piece 3 or the folded duct piece.
A waterproof rubber pad is used between two adjacent sections of the pipe gallery main body, and the pre-pressure of the waterproof rubber pad is not less than 3 MPa. And setting a settlement joint between every two adjacent sections of the pipe gallery main body every 40-60 meters.
The inclined support for unloading the pipe gallery main body is composed of two rows of inclined piles 1 arranged on two sides of the pipe gallery main body respectively and a crown beam 2 connected with the top of each row of inclined piles 1.
Pipe gallery main part both sides are provided with one row of batter pile 1 respectively, and two rows of batter piles 1 set up in pipe gallery main part both sides bilateral symmetry. The batter pile 1 is tightly close to two oblique side walls of the pipe gallery body as much as possible, and the inclination angle of the batter pile is basically the same as that of the two oblique side walls of the pipe gallery body. And digging a soil layer between the two rows of inclined piles 1 to form an open foundation pit. The general condition need not carry out the shotcrete support to the foundation ditch, if meet strong rainfall weather or groundwater and gush the circumstances such as, carry out the shotcrete support to the foundation ditch. The pile diameter of the batter pile 1 is generally not less than 600mm, preferably in the range of 600-800mm, and the spacing of the batter pile 1 is in accordance with the specification requirement. When the inclined pile 1 is constructed, a steel bar is reserved at the top of the inclined pile to be conveniently connected with the crown beam 2. And filling the gap between the pipe gallery main body and the inclined pile 1 with cement mortar 4, wherein the strength of the cement mortar is more than 10 MPa.
The upper parts of the two rows of the inclined piles 1 are respectively connected by the crown beams 2, the width (horizontal direction) of the crown beams 2 is not suitable to be smaller than the pile diameter of the inclined piles 1, and the height (vertical direction) of the crown beams 2 is not suitable to be smaller than 0.6 time of the width of the crown beams 2. The concrete strength grade of the crown beam 2 is preferably higher than C25, and the crown beam 2 should be provided with a settlement joint at certain intervals.
As shown in fig. 1 and 2, in an alternative embodiment of the present invention, the cross section of the pipe rack main body is an isosceles trapezoid with upper and lower base angles of 60 ° and 120 °, and each segment of the pipe rack main body is assembled by two different groove-shaped pipe pieces 3. The shapes of the prefabricated groove-shaped pipe pieces 3 are different, the length of the top edge of one groove-shaped pipe piece 3 is 1/3 of the total top edge of the trapezoid, the length of the bottom edge of the groove-shaped pipe piece is 2/3 of the total bottom edge of the trapezoid, the lengths of the side edges and the total bottom edge of the trapezoid are the same, the included angle between the top edge and the side edge is 60 degrees, and the included angle between the side edge and the bottom edge is 120. The length of the top edge of the groove-shaped duct piece 3 in the second groove-shaped duct piece is 2/3 of the total top edge of the trapezoid, the length of the bottom edge of the groove-shaped duct piece is 1/3 of the total bottom edge of the trapezoid, the length of the side edge of the groove-shaped duct piece is the same as that of the total bottom edge of the trapezoid, the included angle between the top edge and the side edge of the groove-shaped.
In this alternative embodiment, the transverse connection of the groove-shaped duct pieces 3 is that two groove-shaped duct pieces 3 in the same segment are assembled into a frame structure with a trapezoidal section, and the longitudinal connection of the groove-shaped duct pieces 3 is that the longitudinal connection of two adjacent frame structures with trapezoidal sections is a staggered joint connection. As shown in fig. 3, bolt holes for transverse connection of grooved segments 3 are usually preset in the middle and both sides of the longitudinal direction of grooved segments 3 at a distance of 200-300mm from the edge, and the center distance of the bolt holes for corresponding connection on two adjacent grooved segments 3 is 300-400 mm. Bolt holes for longitudinally connecting the folded duct pieces 3 are reserved on the cross sections of the groove-shaped duct pieces 3, one bolt hole is reserved on the bottom edge or the top surface with the shorter length (located in the middle position), two bolt holes are reserved on the bottom edge or the top surface with the longer length (located at the positions 1/4 and 3/4 away from the folding angle respectively), and two bolt holes are reserved on the side edges (located at the positions of two trisection points). After the groove-shaped duct pieces 3 are spliced, the connection is carried out through the joint bolts 5 according to the reserved bolt holes, as shown in figure 4.
The construction method of the trapezoid pipe gallery system combining the inclined support with the main structure specifically comprises the following steps:
positioning of inclined pile 1
The position of batter pile 1 is confirmed according to the pipe gallery design, and then according to pipe gallery size, design buried depth, hydrogeological conditions come to estimate the buried depth and the size of two rows of batter piles 1, carry out the lofting location at last.
Second, oblique pile 1 construction
The drilling machine is installed firstly, so that the centers of the drill rods are overlapped, and the inclination is adjusted according to the design requirements of the main body of the trapezoidal pipe gallery. The drilling process adopts a positive circulation rotary drilling construction technology, a clay layer is thrown with a small amount of soil properly, slurry is automatically made by drilling, and the slurry concentration is increased to fix the wall in a sand layer. And cleaning the hole after drilling is finished, and completely removing sediments as far as possible, so that the concrete and the bedrock are well jointed, and the bearing capacity of the pile bottom is improved. And integrally hoisting the manufactured reinforcement cage, pouring concrete, wherein the time from the moment when the reinforcement cage enters the hole to the moment when the concrete pouring is finished is not more than 4 hours.
Construction of third, top beam 2
And measuring and paying off according to design requirements, then digging a groove, chiseling the pile head of the inclined pile 1, and cleaning the pile head of the inclined pile 1. And (3) binding reinforcing steel bars and supporting templates on the basis of the reserved reinforcing steel bars of the inclined piles 1 according to design requirements, and then pouring the crown beam 2.
Fourthly, excavation of foundation pit
And before the foundation pit is excavated, setting a pipe well and a well point for dewatering. According to design requirements, foundation pit excavation is carried out between two rows of inclined piles 1, a long-arm excavator is used for excavating within 6m of the top layer, and earthwork below 6m is excavated and installed by a manpower matched excavator; and tamping the field after digging. The general condition need not carry out the shotcrete support to the foundation ditch, if meet strong rainfall weather or groundwater and gush the circumstances such as, carry out the shotcrete support to the foundation ditch.
Fifthly, hoisting and assembling the groove-shaped duct piece 3 and/or the folded duct piece
Hoisting the groove-shaped duct piece 3 and/or the folded duct piece placed beside the foundation pit to the bottom of the foundation pit by using a crane, and splicing the groove-shaped duct piece 3 and/or the folded duct piece by using a joint bolt 5 at a reserved bolt hole after hoisting is finished. Each segment is spliced by two to four groove-shaped pipe pieces 3 and/or folded pipe pieces, and the length of the main body of the pipe gallery of each segment is 2-3 m. The pipe gallery main body is formed by splicing a plurality of sections longitudinally, a waterproof rubber pad is arranged at the joint between the sections, and the pre-pressure of the waterproof rubber pad is not less than 3 MPa. Setting a settlement joint between every two adjacent sections of the pipe gallery body every 40-60 meters.
Sixthly, gap grouting
Injecting cement mortar 4 into a gap between two oblique side walls of the assembled pipe gallery main body and the oblique piles 1 by using guide pipes to enable the pipe gallery main body to be tightly combined with the oblique piles 1; the maximum pressure of the grouting is generally greater than 4 MPa.
Seventhly, backfilling
And performing backfill construction between the top of the pipe gallery main body and the inclined pile 1, wherein the backfill needs to meet the requirements of compactness, water content and the like, a method of layering and spreading the backfill by using a scraper, a scraper and the like is adopted, and the thickness of each layer of spread 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 (8)
1. A trapezoid pipe gallery system combining an inclined support with a main structure is characterized by comprising a pipe gallery main body and an inclined support;
the cross section of the pipe gallery main body is an isosceles trapezoid with the top edge larger than the bottom edge, the pipe gallery main body is formed by splicing a plurality of sections in the length direction, and each section is a frame structure formed by splicing two to four groove-shaped pipe pieces and/or folded pipe pieces;
the inclined support comprises inclined piles arranged on two sides of the pipe gallery main body, and the two rows of inclined piles are symmetrically arranged on two sides of the pipe gallery main body and are close to two inclined side walls of the pipe gallery main body; cement mortar is filled between the inclined pile and the two inclined side walls of the pipe gallery main body; the top of each row of the inclined piles is connected with a crown beam;
before the construction of the pipe gallery main body, a soil layer between two rows of inclined piles is dug out to form an open foundation pit; after the pipe gallery main body is constructed, the two oblique side walls of the pipe gallery main body and the oblique piles backfill soil.
2. The ladder-shaped pipe rack system combining the inclined support and the main body structure as claimed in claim 1, wherein the groove-shaped pipe pieces and/or the zigzag-shaped pipe pieces of two adjacent sections of the pipe rack main body are installed in a staggered connection mode.
3. The ladder-shaped pipe gallery system combining the inclined support and the main body structure as claimed in claim 1, wherein the groove-shaped pipe pieces and/or the folded pipe pieces are connected transversely and longitudinally by joint bolts.
4. A ladder-shaped pipe rack system with inclined supporting and body structure combined according to claim 1, characterized in that the length of each section of the pipe rack body is 2-3 m.
5. The trapezoidal pipe gallery system combining inclined support and main body structure as claimed in claim 1, wherein the total length of the top edge of the trapezoid of the section of the pipe gallery main body is 1.8-2.2 times of the total length of the bottom edge of the trapezoid.
6. The trapezoidal pipe gallery system combining inclined support and main body structure as claimed in claim 1, wherein a waterproof rubber pad is used between two adjacent sections of the pipe gallery main body.
7. The trapezoidal pipe gallery system combining the inclined support and the main body structure as claimed in claim 1, wherein the cross section of the pipe gallery main body is an isosceles trapezoid with upper and lower base angles of 60 ° and 120 ° respectively, and each segment of the pipe gallery main body is formed by assembling two different groove-shaped pipe pieces.
8. The trapezoidal pipe gallery system combining the inclined support and the main body structure as claimed in claim 1, wherein the pile diameter of the inclined pile is 600-800 mm; the width of the crown beam is not less than the pile diameter of the inclined pile, and the height of the crown beam is not less than 0.6 time of the width of the crown beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920693152.2U CN210562288U (en) | 2019-05-15 | 2019-05-15 | Trapezoidal pipe gallery system that combines with major structure is strutted in slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920693152.2U CN210562288U (en) | 2019-05-15 | 2019-05-15 | Trapezoidal pipe gallery system that combines with major structure is strutted in slope |
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| Publication Number | Publication Date |
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| CN210562288U true CN210562288U (en) | 2020-05-19 |
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| CN201920693152.2U Active CN210562288U (en) | 2019-05-15 | 2019-05-15 | Trapezoidal pipe gallery system that combines with major structure is strutted in slope |
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| CN (1) | CN210562288U (en) |
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