CN106894350B - Steel blade angle soil-entering jacking box culvert device and construction method - Google Patents
Steel blade angle soil-entering jacking box culvert device and construction method Download PDFInfo
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- CN106894350B CN106894350B CN201710075789.0A CN201710075789A CN106894350B CN 106894350 B CN106894350 B CN 106894350B CN 201710075789 A CN201710075789 A CN 201710075789A CN 106894350 B CN106894350 B CN 106894350B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
Abstract
The invention relates to a steel blade angle soil-entering and jacking box culvert device and a construction method, wherein the device comprises a box culvert body; the box culvert is characterized in that a movable steel edge angle is arranged at the front end of the box culvert body, the movable steel edge angle is nested at the front end of the box culvert body and moves in a reciprocating mode along the jacking direction of the box culvert body, and an edge angle jack which pushes the movable steel edge angle to advance is arranged on the front end face of the box culvert body. The construction method adopts an alternate jacking mode of the movable steel edge angle and the box culvert body. The invention has the beneficial effects that: the capability of the steel edge angle and the box culvert jacking into the roadbed is obviously improved, the front end of the movable steel edge angle is kept in a soil layer of the roadbed in the construction process, the box culvert lateral roadbed collapse can be effectively prevented, and the safe reliability of box culvert jacking construction is ensured.
Description
Technical Field
The invention belongs to the technical field of bridge equipment, and particularly relates to a steel blade angle soil-entering box culvert jacking device and a construction method.
Background
When a box type passing culvert is added on an existing railway or highway, a construction method that the box type passing culvert is prefabricated beside a roadbed and then jacked in is mostly adopted in order to avoid interrupting existing traffic. When pushing in, the railway is often built on stilts uninstallation of track with just roof beam, and the box culvert main part is excavated the limit in the below and is pushed in simultaneously, in order to prevent that the box culvert side direction road bed from collapsing, often sets up the simple and easy steel sword angle of being fixed in on the front end side wall. According to construction experience for many years, the method basically cannot play a protection role because the steel cutting edge does not penetrate into the soil. Because the steel blade angle does not go into the soil, the road bed excavation face is big, and the box culvert is at the jacking process, and the front end side collapses unavoidably, and it is great to lead to the fact backfill work volume for later stage jacking target in place to because the narrow unable assurance backfill quality of operating space leaves the potential safety hazard for the road bed.
Disclosure of Invention
The invention aims to provide a technical scheme of a steel blade angle soil-entering and box culvert jacking device and a construction method, which improves the box culvert jacking function and enhances the safety and reliability of the box culvert soil-entering and jacking construction.
In order to realize the purpose, the technical scheme of the invention is as follows: a steel blade angle soil-entering and box culvert jacking device comprises a box culvert body; the box culvert is characterized in that a movable steel edge angle is arranged at the front end of the box culvert body, the movable steel edge angle is nested at the front end of the box culvert body and moves in a reciprocating mode along the jacking direction of the box culvert body, and an edge angle jack which pushes the movable steel edge angle to advance is arranged on the front end face of the box culvert body.
Still further, the movable steel cutting edge comprises a bottom plate cutting edge, a top plate cutting edge, a left side cutting edge and a right side cutting edge, the front edge of the movable steel cutting edge is a wedge-shaped end extending forwards from the top plate cutting edge, and the front edges of the left side cutting edge and the right side cutting edge of the movable steel cutting edge are in a sawtooth shape provided with a vertical front end cutting edge.
The movable steel edge angle is characterized in that the front edge of the movable steel edge angle is a wedge-shaped end with a wedge-shaped inclination of 1, the front edges of the left edge angle and the right edge angle of the movable steel edge angle are right-angled saw teeth formed by the vertical front edge and the horizontal edge, and the lengths of the vertical front edge and the horizontal edge are both 200mm.
Furthermore, the movable steel edge angle is provided with a plurality of reinforcing ribs, the rear end of each reinforcing rib is provided with a bearing plate, each reinforcing rib is provided with one edge angle jack corresponding to each reinforcing rib, and the edge angle jacks are pressed on the bearing plates.
Furthermore, the front end of the box culvert body is provided with an inner lining steel sleeve and an outer lining steel sleeve, the inner cavity of the movable steel blade angle is nested on the inner lining steel sleeve in a sliding fit manner, and the movable steel blade angle is nested in the outer lining steel sleeve; and the rear end of the movable steel blade angle reciprocates between the lining steel sleeve and the outer protective steel sleeve.
Furthermore, the nesting length of the movable steel edge angle and the box culvert body is 1600mm, and the maximum stroke of the edge angle jack is not less than 500mm.
A steel blade angle soil-entering jacking box culvert construction method adopts a steel blade angle soil-entering jacking box culvert device to jack a box culvert into a roadbed body, wherein the steel blade angle soil-entering jacking box culvert device comprises a box culvert body, a movable steel blade angle is arranged at the front end of the box culvert body, the movable steel blade angle is nested at the front end of the box culvert body and moves in a reciprocating mode along the jacking direction of the box culvert body, a blade angle jack for jacking the movable steel blade angle forwards is arranged on the front end face of the box culvert body, and a main body jacking device for pushing the box culvert body to forwards is arranged at the rear end of the box culvert body; the construction method comprises the following steps:
a. placing the steel blade angle soil-entering jacking box culvert device beside the roadbed body in place, and arranging a main body jacking device at the rear end of the box culvert body;
b. jacking the movable steel edge angle by using the edge angle jack, and jacking the movable steel edge angle into the roadbed body for a jacking stroke;
c. excavating the roadbed body of the part pushed into the movable steel blade angle, and keeping the front end of the movable steel blade angle cut into the soil in the excavating process;
d. removing the jacking pressure of the edge angle jack on the movable steel edge angle to enable the edge angle jack to contract, and pushing the box culvert body to advance for a section of jacking stroke by the main body jacking device;
e. and c, repeating the step b.
Furthermore, in step b, the pressing stroke is 450mm.
Furthermore, in step c, digging to cut the front end of the movable steel cutting edge into the soil by not less than 10mm.
The invention has the beneficial effects that: adopt the alternative mode of pushing into of activity steel blade angle and box culvert body, showing and improving the ability that steel blade angle and box culvert pushed into the road bed, make the front end of activity steel blade angle keep in the soil layer of road bed in the work progress, can prevent effectively that box culvert side direction road bed from collapsing, guarantee the safe and reliable nature that box culvert digs into the soil and pushes into the construction.
The invention is described in detail below with reference to the figures and examples.
Drawings
FIG. 1 is a structural diagram of the steel blade angle soil-entering box culvert jacking device;
FIG. 2 is an exploded view of the steel blade angle soil-entering and box culvert jacking device of the invention;
FIG. 3 is a sectional elevation view of the steel blade angle soil-entering jacking box culvert device of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
FIG. 5 is an enlarged view of part B of FIG. 3;
FIG. 6 is a schematic view of the construction method of the present invention, which is the in-place state of the steel blade angle soil-entering box culvert jacking device beside the roadbed body;
FIG. 7 is a schematic diagram of the construction method of the present invention, in which the movable steel cutting edge is pressed by a cutting edge jack to cut into the roadbed soil;
FIG. 8 is a schematic view of the construction method of the present invention, excavating the roadbed body of the part pushed by the movable steel blade angle;
FIG. 9 is a schematic view of the construction method of the present invention, wherein the main body jacking device pushes the box culvert body to advance;
fig. 10 is a schematic view of the construction method of the present invention, repeated cutting of the movable steel cutting edge into the roadbed soil.
Detailed Description
Referring to fig. 1 to 5, a steel blade angle soil-entering and jacking box culvert device comprises a box culvert body 10; the box culvert is characterized in that a movable steel edge angle 20 is arranged at the front end of the box culvert body, the movable steel edge angle is nested at the front end of the box culvert body and moves in a reciprocating mode along the jacking direction of the box culvert body, and an edge angle jack 30 which pushes the movable steel edge angle to advance is arranged on the front end face of the box culvert body.
The movable steel edge angle comprises a bottom plate edge angle 21, a top plate edge angle 22, a left edge angle 23 and a right edge angle 24, the front edge of the movable steel edge angle is a wedge-shaped end extending forwards from the top plate edge angle, and the front edges of the left edge angle and the right edge angle of the movable steel edge angle are in a sawtooth shape provided with a vertical front end edge 25.
The movable steel edge angle front edge is a wedge-shaped end with a wedge-shaped inclination of 1, the front edges of the left edge angle and the right edge angle of the movable steel edge angle are right-angled saw teeth formed by the vertical front edge 25 and the horizontal edge 26, and the lengths C of the vertical front edge and the horizontal edge are both 200mm.
The movable steel edge angle is provided with a plurality of reinforcing ribs 27, the rear end of each reinforcing rib is provided with a bearing plate 28, each reinforcing rib is provided with one edge angle jack corresponding to each reinforcing rib, and the edge angle jacks are pressed on the bearing plates.
The front end of the box culvert body is provided with an inner lining steel sleeve 11 and an outer lining steel sleeve 12, the inner cavity of the movable steel blade angle is nested on the inner lining steel sleeve in a sliding fit manner, and the movable steel blade angle is nested in the outer lining steel sleeve; and the rear end of the movable steel blade angle reciprocates between the lining steel sleeve and the outer protective steel sleeve.
The nesting length S of the movable steel edge angle and the box culvert body is 1600mm, and the maximum stroke of the edge angle jack is not less than 500mm.
As shown in fig. 6 to 10, a steel blade angle soil-entering box culvert jacking construction method adopts the steel blade angle soil-entering box culvert jacking device to jack a box culvert into a roadbed body 01, the steel blade angle soil-entering box culvert device comprises a box culvert body 10, a movable steel blade angle 20 is arranged at the front end of the box culvert body, the movable steel blade angle is nested at the front end of the box culvert body and moves in a reciprocating manner along the jacking direction of the box culvert body, a blade angle jack 30 for jacking the movable steel blade angle forwards is arranged on the front end surface of the box culvert body, and a main body jacking device 40 for pushing the box culvert body forwards is arranged at the rear end of the box culvert body; the construction method comprises the following steps:
a. placing the steel blade angle soil-entering jacking box culvert device beside the roadbed body in place, and arranging a main body jacking device at the rear end of the box culvert body, as shown in fig. 6;
b. jacking the movable steel edge angle by using the edge angle jack, and jacking the movable steel edge angle into the roadbed body by a jacking stroke L, as shown in FIG. 7;
c. excavating the roadbed body at the part pushed into by the movable steel blade angle, wherein the front end of the movable steel blade angle is kept to be cut into the soil in the excavating process, as shown in fig. 8;
d. removing the jacking pressure of the edge angle jacks on the movable steel edge angles to enable the edge angle jacks to contract, and pushing the box culvert body to advance for a section of jacking stroke by the main body jacking device, wherein the jacking stroke is as shown in figure 9;
e. repeat step b as shown in fig. 10.
In the step b, the top pressure stroke L is 450mm.
And c, excavating until the front end of the movable steel edge angle is cut into the soil, wherein L0 is not less than 10mm.
The first embodiment is as follows:
referring to fig. 1 to 5, a steel blade angle soil-entering box culvert jacking device comprises a box culvert body 10. The box culvert body is a reinforced concrete prefabricated box culvert and passes through the culvert of the railway roadbed in a jacking mode. The box culvert body of this embodiment is a box culvert that the cross section is square, and outer wall width W =3960mm, outer wall height H =3560mm, inner wall width W0=3000mm, inner wall height H0=2600mm. The front end of box culvert body is equipped with one section length S =1600mm long shrink section, is equipped with inside lining steel bushing 11 at the surface of shrink section, and the inside lining steel bushing is the steel sheet that 20mm is thick, pre-buried on the box culvert body when pouring, and the surface indentation box culvert body of inside lining steel bushing' S surface S1=70mm. An outer steel protecting sleeve 12 is nested in the lining steel sleeve, the outer surface of the outer steel protecting sleeve is flush with the outer surface of the box culvert body, the outer steel protecting sleeve is a steel plate with the thickness of 20mm, the root of the contraction section is fixed on the box culvert body through embedded iron 13, and the length S2=1000mm of the outer steel protecting sleeve extending out of the root of the contraction section. An empty sleeve with a distance of 50mm is formed between the lining steel sleeve and the outer protective steel sleeve.
The front end of the box culvert body is provided with a movable steel edge angle 20, and the cross section of the movable steel edge angle is square corresponding to the box culvert body. The movable steel cutting edge comprises a bottom plate cutting edge 21, a top plate cutting edge 22, a left side cutting edge 23 and a right side cutting edge 24. The front edge of the movable steel cutting edge angle is a wedge-shaped end extending forwards from the cutting edge angle of the top plate, and the wedge-shaped inclination K is 1. The leading edges of the left and right cutting edges are right-angled zigzags formed by vertical front edges 25 and horizontal edges 26, and the lengths C of the vertical front edges and the horizontal edges are both 200mm. The movable steel edge angle is provided with a plurality of reinforcing ribs 27. In this embodiment, the left side edge angle and the right side edge angle are respectively provided with 7 reinforcing ribs, and the bottom plate edge angle and the top plate edge angle are respectively provided with 8 reinforcing ribs. And a bearing plate 28 is arranged at the rear end of the reinforcing rib.
The movable steel edge angle is a square cylinder body formed by a steel plate with the thickness of 30mm, the inner cavity of the movable steel edge angle is nested on the inner lining steel sleeve of the box culvert body in a sliding fit mode, the movable steel edge angle is nested inside the outer protection steel sleeve, and the maximum nesting length S between the movable steel edge angle and the box culvert body is 1600mm. The rear end of the movable steel blade angle reciprocates between the lining steel sleeve and the outer protective steel sleeve, and the moving direction is also the jacking direction of the box culvert body.
And a blade angle jack 30 for jacking and pressing the movable steel blade angle to advance is arranged on the front end surface of the box culvert body. In this embodiment, each reinforcing rib corresponding to the movable steel edge angle is provided with one edge angle jack, and there are 30 edge angle jacks in total. The knife edge jack is pressed on the bearing plate of the movable steel knife edge. The maximum travel of the knife edge jack is 500mm.
The method for manufacturing the steel blade angle soil-entering jacking box culvert device comprises the step of manufacturing a bottom plate blade angle, a left side blade angle, a right side blade angle and a top plate blade angle separately. The bottom blade angle is manufactured on site firstly, and then is placed in a prefabricated working pit of the box culvert, and then the bottom plate concrete of the box culvert body and the embedded annular inner and outer lining steel plate sheath system are constructed. After the construction of the box culvert side wall, the roof and the connected front lining steel plate is finished, the left edge angle, the right edge angle and the roof edge angle are installed, and then the box culvert front end outer lining sheath steel plate is installed in a welding mode.
Example two:
referring to fig. 6 to 10, in a steel blade angle soil-entering box culvert jacking construction method, a steel blade angle soil-entering box culvert device according to the first embodiment is adopted to jack a box culvert into a roadbed body 01, and the roadbed of the first embodiment is a railway roadbed with two side slopes of 1.
The rear end of the box culvert body is provided with a main body jacking device 40 for pushing the box culvert body to advance.
The construction method comprises the following steps:
a. placing the steel blade angle soil-entering jacking box culvert device beside the roadbed body in place, and arranging a main body jacking device at the rear end of the box culvert body, as shown in fig. 6;
b. pressing the movable steel edge angle by using an edge angle jack, and jacking the movable steel edge angle into the roadbed body by a jacking stroke L =450mm, so that the movable steel edge angle is cut into a roadbed soil body, as shown in fig. 7;
c. and excavating the roadbed body of the part pushed into by the movable steel blade angle, wherein the front end of the movable steel blade angle is kept to be cut into the soil in the excavating process, and the movable steel blade angle is excavated until the front end of the movable steel blade angle is cut into the soil, wherein L0=10mm. As shown in fig. 8;
d. removing the jacking of the edge angle jack to the movable steel edge angle to enable the edge angle jack to contract, pushing the box culvert body to move forward by the main body jacking device, wherein the forward length is a jacking stroke of 450mm, as shown in figure 9;
e. repeat step b as shown in fig. 10. Until the box culvert body passes through the roadbed.
Because the alternative jacking mode of the movable steel edge angle and the box culvert body is adopted, the jacking resistance of the movable steel edge angle and the box culvert body is smaller, and the jacking operation is easier to complete. And the damage to the box culvert body and the movable steel edge angle can be avoided. In the construction process, the front edge of the movable steel edge angle is cut into the soil body of the roadbed all the time, so that the collapse of the soil body of the roadbed can be effectively avoided, and the processing workload of the roadbed at the side face of the box culvert in the later period is reduced. Because the road bed body excavates, its excavation face can form the slope of nature, and activity steel cutting edge angle forward edge adopts inclination K to be 1 wedge end, can adapt to the natural slope of soil body effectively, is that the front end of activity steel cutting edge angle is effectual to keep in the soil body. The front edges of the left edge angle and the right edge angle are in right-angled sawtooth shapes, so that upward counter force generated by the bevel edge soil body to the edge angle can be eliminated. The device has simple structure and convenient use, can ensure the safe reliability of the box culvert in-soil jacking construction and improve the construction quality.
Claims (7)
1. A steel blade angle soil-entering and box culvert jacking device comprises a box culvert body; the box culvert is characterized in that a movable steel edge angle is arranged at the front end of the box culvert body and comprises a bottom plate edge angle, a top plate edge angle, a left side edge angle and a right side edge angle, the front edge of the movable steel edge angle is a wedge-shaped end with a wedge-shaped inclination of 1.
2. The steel blade angle soil entering jacking box culvert device of claim 1, wherein the length of each of the vertical front end blade and the horizontal edge is 200mm.
3. The steel blade angle soil-penetrating jacking box culvert device according to claim 1, wherein the front end of the box culvert body is provided with an inner lining steel sleeve and an outer lining steel sleeve, the inner cavity of the movable steel blade angle is nested on the inner lining steel sleeve in a sliding fit manner, and the movable steel blade angle is nested in the outer lining steel sleeve; and the rear end of the movable steel blade angle reciprocates between the lining steel sleeve and the outer protective steel sleeve.
4. The steel-edged angle-embedded box culvert jacking device of claim 1, wherein the nesting length of the movable steel-edged angle and the box culvert body is 1600mm, and the maximum stroke of the angle-edged jack is not less than 500mm.
5. A steel blade angle soil-entering jacking box culvert construction method adopts a steel blade angle soil-entering jacking box culvert device to jack a box culvert into a roadbed body, wherein the steel blade angle soil-entering jacking box culvert device comprises a box culvert body, a movable steel blade angle is arranged at the front end of the box culvert body, the movable steel blade angle comprises a bottom plate blade angle, a top plate blade angle, a left blade angle and a right blade angle, the front edge of the movable steel blade angle is a wedge-shaped end with a wedge-shaped inclination of 1; the construction method is characterized by comprising the following steps:
a. placing the steel blade angle soil-entering jacking box culvert device beside the roadbed body in place, and arranging a main body jacking device at the rear end of the box culvert body;
b. adopting the edge angle jack to jack and press the movable steel edge angle, and jacking the movable steel edge angle into the roadbed body for a jacking stroke;
c. excavating the roadbed body of the part pushed into the movable steel blade angle, and keeping the front end of the movable steel blade angle cut into the soil in the excavating process;
d. removing the jacking pressure of the edge angle jack on the movable steel edge angle to enable the edge angle jack to contract, and pushing the box culvert body to move forward by a section of jacking stroke by the main body jacking device;
e. and c, repeating the step b.
6. The method for constructing the steel blade angle box culvert in the soil according to claim 5, wherein in the step b, the jacking stroke is 450mm.
7. The method for constructing the steel blade angle-embedded box culvert and the jacking box culvert as claimed in claim 5, wherein in the step c, the front end of the movable steel blade angle is excavated to be cut into the soil by not less than 10mm.
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| CN109267504A (en) * | 2018-09-26 | 2019-01-25 | 北京工业大学 | The fore slope box culvert structure of fast quick-detach |
| CN109667588B (en) * | 2019-02-01 | 2024-03-26 | 驻马店市公路工程开发有限公司 | Sliding film for reducing box culvert pushing disturbance, box culvert pushing system and construction method |
| CN114233310A (en) * | 2021-12-24 | 2022-03-25 | 济南市市政工程设计研究院（集团）有限责任公司 | Square culvert jacking construction device, system and method |
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