CN113846687A - Sinking construction device for cast-in-place underground building - Google Patents

Abstract

The invention discloses a sinking construction device for a cast-in-place underground building, which relates to the technical field of underground building construction.

Description

Sinking construction device for cast-in-place underground building

Technical Field

The invention relates to the technical field of underground building construction, in particular to a sinking construction device for a cast-in-place underground building.

Background

The existing large-scale underground building is constructed by an open cut method commonly used, the open cut method needs to firstly open a foundation pit for supporting, then the underground building is poured or assembled in the foundation pit, the bottom rock soil is excavated by adopting a chain cutter at present, the whole sinking technical scheme is adopted, and the sinking construction without a hanging device has the following defects because the self load of the underground building is too heavy: the inclination and the deviation are easy to generate, a deviation rectifying device needs to be additionally arranged when the device sinks, and once the deviation is generated, the deviation rectification is difficult to realize; the large load is pressed on the bottom chain cutter, so that the power of the driving device is too large, and the chain cutter is easy to break; the descent speed is difficult to control; the cutter feeding amount of the bottom chain cutter is out of control, so that the cutter is easily damaged; to this end we propose a sinking construction device for cast-in-place underground buildings to solve the above problems.

Disclosure of Invention

The present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a sinking construction apparatus for a cast-in-place type underground structure, which solves the above problems occurring in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the construction device of the underground building comprises a chain cutter excavating device, a hanging device and a pouring device, wherein the chain cutter excavating device comprises a chain cutter and a chain cutter driving device, the chain cutter comprises a chain and cutters arranged on the chain, the building is poured on the ground in a segmented mode according to the length direction through the pouring device, the chain cutter is transversely enveloped outside the cross section of the building, the hanging device is used for enabling the building to be in a hanging state, the chain cutter driving device is started, the chain cutter at the bottom of the building excavates rock soil, and the chain cutter running from bottom to top brings the excavated rock soil to the top, so that sinking construction of the building is achieved.

As a further scheme of the invention: the hanging device comprises steel strand hydraulic lifting jacks, and the steel strand hydraulic lifting jacks synchronously and slowly lift.

As a further scheme of the invention: the building is integrally and synchronously sunk in a suspension state, and does not deviate due to the huge dead weight of the building.

As a further scheme of the invention: the building sinks to a set depth, and when the buoyancy of underground water to the building and the friction of rock soil to the building are equal to the dead weight of the building including the chain cutter digging device, the building is in a critical state, and the building is always in a suspension state in the sinking process by weighting the building.

As a further scheme of the invention: the chain knife comprises a chain plate, the chain plate is arranged on the chain, and the knife is arranged on the chain plate.

As a further scheme of the invention: the chain cutter excavating device comprises a plurality of groups of tapered strip chain cutters, each strip chain cutter comprises a head cutter positioned at the front end, a middle cutter positioned in the middle and a scraper positioned at the tail end, each head cutter comprises a long cutter, each middle cutter comprises two short cutters, the height of each scraper is slightly lower than that of each head cutter and each middle cutter, the head cutters and the middle cutters excavate rock soil, and the excavated rock soil is brought to the front by the scrapers.

As a further scheme of the invention: when the chain cutter is used for excavating rock and soil, different geological conditions are met by controlling the descending speed of the hanging device, and when the chain cutter is worn, the chain cutter is replaced at the top.

As a further scheme of the invention: the building comprises a lower section, a middle section and an upper section in the height direction, wherein the lower section, the middle section and the upper section are poured in sections, and the middle section is poured after the lower section sinks to a set depth; and after the middle section sinks to the set depth, pouring the upper section, and finally completing the section-by-section sinking of the building.

As a further scheme of the invention: the building sinks section by section, two ends of the building in the middle section comprise a wide end and a narrow section, and the narrow section sinking backwards is embedded in the wide end.

In conclusion, this technique has adopted cable suspension device, and underground building's dead weight is balanced by cable suspension device, has following advantage:

1) because the underground building is extremely heavy and cannot deviate, a deviation rectifying device is not needed;

2) the dead weight of the underground building is not pressed on the chain cutter, so that the power of the driving device is small, the tension of the chain is small, and the chain is not easy to break;

3) the descending speed is controllable;

4) different geological conditions can be adapted by controlling the amount of feed.

Drawings

Fig. 1 is a structural schematic diagram of a building 1 which is cast in sections on the ground along the length direction through a casting device 23, wherein the casting device 23 adopts traditional concrete pumping equipment to convey concrete and adopts formwork support in the form of slip forms or fixed formworks and the like;

fig. 2 is a schematic structural view of a construction apparatus 2 for sinking a section of a building 1 that has been cast;

fig. 3 is a schematic structural diagram of the chain cutter 3 of the chain cutter excavating device 21 wrapped at the bottom and the side of the building 1, the chain cutter 3 positioned at the bottom of the building 1 excavates rock soil, and the building 1 and the chain cutter excavating device 21 sink together with the hanging assistance of the hanging device 22;

FIG. 4 shows the chain 31 of the chain cutter 3 as an endless chain, the two chains 31 being connected together by a link plate 33, the link plate 33 being provided with a cutting pick-shaped cutter 32;

FIG. 5 is a schematic structural view of a tapered strip-shaped chain cutter 5;

fig. 6 is a schematic structural view of a structure in which the building 1 is a subway station and sinking is performed after the construction of the internal structure 6 is completed;

FIG. 7 is a schematic view of the casting device 23 casting the lower section 11 of the building 1;

fig. 8 is a schematic structural view of the construction apparatus 2 such that the cast-cured lower section 11 and the middle section 12 are sunk;

fig. 9 is a schematic structural diagram of pouring the upper section 13 on the middle section 12, and then lengthening the chain cutter 3 at the upper section 13 to form a closed loop, so as to form the chain cutter excavating device 21 to sink continuously;

FIG. 10 is a schematic view of the structure of a middle section of building 1 including wide end 7 and narrow section 8 at both ends;

FIG. 1 is a building; 11 is the lower section; 12 is the middle section; 13 is the upper section; 2 is a construction device; 21 is a chain cutter excavating device; 211 is a chain cutter driving device; 22 is a hanging device; 23 is a casting device; 3 is a chain cutter; 31 is a chain; 32 is a knife; 33 is a link plate; 4, a steel strand hydraulic lifting jack; 5 is a strip chain cutter; 51 is a head knife; 52 is an intermediate knife; 522 is a short knife; 53 is a squeegee; 6 is an internal structure; 7 is the wide end; and 8 is a narrow section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in fig. 1, a building 1 is a comprehensive pipe gallery, and is poured in sections in the length direction and sinks in sections; the construction device 2 comprises a chain cutter excavating device 21, a hanging device 22 and a pouring device 23, as shown in fig. 2, the cross section of the comprehensive pipe gallery is enveloped by a whole chain cutter 3, the chain cutter 3 comprises a chain 31 and cutters 32 installed on the chain 31, track grooves for the operation of the chain 31 are arranged on the ground and two side faces of the comprehensive pipe gallery, the cutters 32 operate outside the building 1, the chain cutters 3 are driven by a chain cutter driving device 211, the chain cutter driving device can be powered by a motor or a hydraulic motor, the chain cutter driving device is connected with a chain wheel, the chain wheel rotates to drive the chain cutters 3 to move, as shown in fig. 2 and fig. 3, the chain cutters 3 and the chain cutter driving device 211 of the adjacent chain cutter excavating device 21 are in a high-low layout, the hanging device 22 hangs the main structure of the building 1 through a space with staggered heights, and the upper part of the hanging device 22 is supported on the ground through a portal frame.

As shown in fig. 6, a plurality of sets of chain cutter excavating devices 21 are arranged in the longitudinal direction of the utility tunnel, the chain cutters 3 are fully distributed on the whole bottom plate of the utility tunnel, and the chain cutter driving device 211 of each set of chain cutter excavating device 21 is positioned on the side edge of the cross section of the utility tunnel and is higher than the chain cutter steering fulcrum on the other side, so that the chain cutter 3 positioned at the top of the utility tunnel has a certain inclination angle, and one side is higher and the other side is lower; the chain cutter driving devices 211 of the adjacent chain cutter excavating devices 21 are symmetrically arranged in the two side directions, in a cross sectional view, the chain cutters 3 of the adjacent chain cutter excavating devices 21 are staggered to form a fork shape, two lifting beams are arranged between the two chain cutters 3 on the left side and the right side of the fork shape, the chain cutters 3 are arranged on the upper portions of the lifting beams in the position interval of the chain cutter driving devices 211, the lifting beams are provided with connecting rods to be connected with the building 1, and the chain cutters 3 are arranged on the lower portions of the lifting beams in the position interval of the non-chain cutter driving devices 211 and are connected with the hanging devices 22 on the upper portions.

The comprehensive pipe gallery is in a hanging state through the hanging device 22, the chain cutter driving device 211 is started, the chain cutter 3 at the bottom of the building 1 excavates rock soil, and the excavated rock soil is brought to the upper side by the chain cutter 3 which runs from bottom to top, so that sinking construction of the building 1 is realized.

As shown in fig. 3, the building 1 is hoisted by the steel strand hydraulic lifting jack 4, the steel strand hydraulic lifting jack 4 synchronously and slowly lifts, the steel strand hydraulic lifting jack 4 adopts a core-penetrating structure hydraulic lifter as a lifting machine tool, wedge-shaped anchors at two ends of the hydraulic lifter have a one-way self-locking function, when the anchors work tightly, the steel strands can be automatically locked, when the anchors do not work and loosen, the steel strands are released, the steel strands can move up and down, the building 1 can be ensured to integrally and synchronously sink in a hanging state, and due to the huge dead weight of the building, deviation cannot be generated, deviation rectification measures are not needed, the pressure of the building 1 on the bottom chain cutter 3 is controlled, and the feed amount of the chain cutter 3 for cutting bottom rock soil is controlled; the dead weight of the building is not pressed on the chain cutter, so the power of the driving device is small, the tension of the chain is small, and the chain is not easy to break.

When the construction apparatus 2 sinks the building 1 to a certain depth, and the buoyancy of the underground water against the building 1 and the frictional force of the rock soil against the building 1 are equal to the self weight of the building 1 including the chain cutter excavating device 21, the building 1 is in a critical state, and the building 1 is made to be in a suspended state during the sinking process by adding water to the building 1, for example.

The chain cutter 3 for excavating the bottom rock soil in the chain cutter excavating device 21 can adopt various structural forms, as shown in fig. 4, the chain 31 of the chain cutter 3 is a ring chain, the two chains 31 are connected together through a chain plate 33, the chain plate 33 is provided with a cutter 32 in a cutting pick shape, the chain cutter excavating device 21 comprises a plurality of groups of strip chain cutters 5 in a conical shape, as shown in fig. 5, the cutters 32 in the strip chain cutters 5 comprise a head cutter 51 positioned at the front end, a middle cutter 52 positioned in the middle and a scraper 53 positioned at the tail end, the head cutter 51 comprises a long cutter 511, the middle cutter 52 comprises two short cutters 522, the height of the scraper 53 is slightly lower than that of the head cutter 51 and the middle cutter 52, the head cutter 51 and the middle cutter 52 excavate the rock soil, and the scraper 53 brings the excavated rock soil to the front; assuming that the width of each group of chain cutters is B, the pitch of the chain is T, n middle cutters 52 are provided, and the length of the short cutter 522 is a, the length of the long cutter 511 is 2a, B = (2 n + 1) a, and the length of each group of strip-shaped chain cutters 5 is equal to (n + 2) T, so that the lengths of the cutters 32 for cutting rock and soil on each link plate 33 can be equal.

When the chain cutter 3 excavates rock soil, different geological conditions are met by controlling the descending speed of the hanging device 22, and when the cutter 32 is worn, the cutter is replaced at the top; when encountering cobblestones and boulders, the cobblestones and boulders are scraped by the knife 32 at an extremely slow descending speed, namely the feed amount is controlled by the steel strand hydraulic lifting jack 4 so as to adapt to different geological conditions.

As shown in fig. 6, the building 1 is a subway station, and is constructed by sinking after the completion of the construction of the entire cast structure including the internal structure 6, and the building 1 further includes a construction a method of constructing the internal structure 6 after sinking, a construction B method of constructing the internal structure 6 after completion of the construction of the internal structure 6, and a construction C method of constructing the internal structure 6 after completion of the construction of a part of the internal structure 6, and completing the construction of the entire internal structure 6 after sinking to the right place.

As shown in fig. 7 to 9, the building 1 includes a lower section 11, a middle section 12 and an upper section 13 in the height direction, the lower section 11, the middle section 12 and the upper section 13 are poured in sections, after the lower section 11 sinks to a set depth, the chain cutter 3 is disconnected, the chain cutter driving device 211 is lifted, the middle section 12 is poured again, after the concrete strength of the middle section 12 reaches the construction strength, the chain cutter 3 is lengthened, the chain cutter driving device 211 is installed, the chain cutter 3 is closed, and the installation of the chain cutter excavating device 21 is completed; similarly, after the middle section 12 sinks to a set depth, the upper section 13 is poured, and finally, the section-by-section sinking of the building 1 is completed.

As shown in fig. 1, 2 and 10, the building 1 is sunk section by section, the two ends of the building 1 in the middle section comprise a wide end 7 and a narrow section 8, and the sunk narrow section 8 is embedded in the wide end 7.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for the convenience of description of the present invention and for simplicity of description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the present invention should not be construed as being limited thereto, and it should be noted that the terms "mounted" and "connected" should be interpreted broadly, for example, as being able to be fixedly connected, detachably connected, or integrally formed, mechanically connected or indirectly connected through an intermediate, and the specific meaning of the terms in the invention can be understood through specific situations.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (9)

1. A sinking construction device for a cast-in-place underground building is characterized in that a construction device (2) of the underground building (1) comprises a chain cutter digging device (21), a hanging device (22) and a pouring device (23), the chain cutter digging device (21) comprises a chain cutter (3) and a chain cutter driving device (211), the chain cutter (3) comprises a chain (31) and a cutter (32) arranged on the chain (31), the building (1) is poured on the ground in sections according to the length direction through the pouring device (23), the chain cutter (3) is transversely enveloped outside the section of the building (1), the building (1) is in a suspended state through the hanging device (22), the chain cutter driving device (211) is started, the chain cutter (3) at the bottom of the building (1) excavates rock soil, the chain cutter (3) running from bottom to top brings the excavated rock soil to the top, and sinking construction of the building (1) is achieved.

2. A sinking construction unit for a cast-in-place underground building according to claim 1, wherein the suspending means (22) comprises a plurality of hydraulic lifting jacks (4), the plurality of hydraulic lifting jacks (4) being synchronously and slowly lifted.

3. A sinking construction unit for a cast-in-place underground building according to claim 2, wherein the building (1) is sunk in a suspended state integrally and simultaneously without deviation due to its own great self weight.

4. A sinking construction unit for a cast-in-place underground building according to claim 3, wherein the building (1) is sunk to a predetermined depth, and is in a critical state when buoyancy of underground water to the building (1) and friction of rock soil to the building (1) are equal to the self weight of the building (1) including the cutter chain excavating unit (21), and the building (1) is always in a suspended state during sinking by applying weight to the building (1).

5. A sinking construction unit for a cast-in-place underground structure according to claim 4, wherein the chain cutter (3) comprises a chain plate (33), the chain plate (33) is mounted on the chain (31), and the cutter (32) is mounted on the chain plate (33).

6. A sinking construction unit for a cast-in-place underground building according to claim 5, wherein the chain cutter excavating device (21) comprises a plurality of sets of tapered chain cutters (5), the chain cutters (5) comprise a head cutter (51) at a front end, a middle cutter (52) at a middle end and a scraping blade (53) at a rear end, the head cutter (51) comprises a long cutter (511), the middle cutter (52) comprises two short cutters (522), the height of the scraping blade (53) is slightly lower than that of the head cutter (51) and the middle cutter (52), the head cutter (51) and the middle cutter (52) excavate the rock soil, and the scraping blade (53) brings the excavated rock soil to the front.

7. A sinking construction unit for a cast-in-place underground structure according to claim 6, wherein the chain cutter (3) is adapted to meet different geological conditions by controlling a descending speed of the hanger (22) when excavating the soil, and is replaced at the top when the cutter (32) is worn.

8. A sinking construction unit for a cast-in-place underground building according to claim 7, wherein the building (1) comprises a lower section (11), a middle section (12) and an upper section (13) in a height direction, the lower section (11), the middle section (12) and the upper section (13) are cast in sections, and the middle section (12) is cast after the lower section (11) sinks to a set depth; and after the middle section (12) sinks to a set depth, pouring the upper section (13), and finally completing the section-by-section sinking of the building (1).

9. A sinking construction unit for a cast-in-place underground building according to claim 8, wherein the building (1) is sunk section by section, the middle section of the building (1) comprises a wide end (7) and a narrow section (8) at both ends, and the narrow section (8) sunk later is embedded in the wide end (7).

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