CN210370641U - Shield constructs quick-witted combined type bearing counterforce device that starts - Google Patents
Shield constructs quick-witted combined type bearing counterforce device that starts Download PDFInfo
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- CN210370641U CN210370641U CN201921175083.2U CN201921175083U CN210370641U CN 210370641 U CN210370641 U CN 210370641U CN 201921175083 U CN201921175083 U CN 201921175083U CN 210370641 U CN210370641 U CN 210370641U
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- counterforce
- frame
- concrete bracket
- inclined strut
- shield
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Abstract
The utility model provides a shield machine originating composite bearing counterforce device, belonging to the technical field of shield machine originating devices, comprising a concrete bracket, a steel rail, a front counterforce frame, a rear counterforce frame, a connecting steel ring, an inclined strut, counterforce feet and anchoring reinforcing steel bars; the concrete bracket is of a reinforced concrete structure, and the top surface of the concrete bracket is provided with an arc-shaped groove matched with the shield tunneling machine; the steel rail is pre-embedded in the concrete bracket; the front reaction frame and the rear reaction frame are connected through a plurality of force transmission beams, and the bottoms of the front reaction frame and the rear reaction frame are fixed on the concrete bracket; the connecting steel ring is a circular ring matched with the duct piece and is connected with the duct piece and the front reaction frame through bolts; the top end of the inclined strut is connected with the rear counterforce frame bolt, and the bottom end of the inclined strut is connected with the counterforce foot bolt; the reaction foot is anchored on the concrete bracket through the anchoring steel bar. The device can effectively prevent the lateral rotation of the shield tunneling machine, provides powerful supporting force and realizes safe and quick starting of the shield tunneling machine.
Description
Technical Field
The utility model belongs to the technical field of the device is originated to the shield constructs the machine, specifically discloses a shield constructs quick-witted combined type bearing counterforce device that originates.
Background
Most of tunnel constructors in urban subway sections adopt shield construction, if shield starting construction is not carried out in a station, a shield starting shaft is usually constructed first, and then a shield machine is hoisted into the starting shaft to carry out shield starting construction. The direction of the shield machine cannot be adjusted when the shield machine is propelled on a track of an initiation bracket in an initiation shaft, and the shield initiation construction is usually carried out in a shaft soil layer which is reinforced by grouting or jet grouting piles, and the tunneling resistance is very high, so that the shield machine can safely and quickly realize initiation and is a serious difficulty and risk point of shield construction.
The starting precondition of the shield machine is as follows: the hole door seal, originating bracket and originating reaction frame must be prepared in place. After the tunnel portal is sealed, the shield tunneling machine needs to be stably arranged on the starting bracket, and the back surface of the reaction frame is fixedly connected with an embedded part on a concrete bottom plate of the shield starting well to provide reaction force for starting propulsion of the shield tunneling machine. The operation of shield starting construction is as follows: when the shield machine on the starting bracket is pushed forward by one unit distance, an oil jack of the shield machine retracts, and a ring negative ring duct piece is newly assembled in a space left on the starting bracket; the rear end face of the serially connected negative ring pipe piece group is tightly attached to the reaction frame, the front end face of the serially connected negative ring pipe piece group is tightly attached to a jack of the shield tunneling machine, then the jack of the shield tunneling machine extends out, and reverse acting force is provided through the negative ring pipe piece group and the reaction frame to enable the shield tunneling machine to be pushed forwards. And circulating in this way until the shield machine body enters the soil layer, wherein the required thrust is smaller than the friction force between the duct piece and the soil layer, and the shield starting construction in the shaft is completed.
The cutter head of the shield machine starts to rotate after contacting with the soil body, friction is generated between the soil body and the cutter head, the cutter head generates torque due to friction resistance, the cutter head torque can react on the shield machine body, and the shield machine and the starting bracket generate a relative rotation trend. At present, the rotation tendency between the shield machine and the starting bracket is generally counteracted by the self weight of the shield machine and the friction force generated by the starting bracket. However, if the torque generated by the friction force between the self weight of the shield machine and the starting bracket is not enough to counteract the reverse torque generated by the tunneling of the cutterhead, the lateral rotation of the shield machine may occur, and the starting failure of the shield machine may be caused in severe cases. The starting counterforce frame bears about 20000-50000 kN counterforce generated during tunneling of the shield machine, needs strong steel structure support, and is the key of starting success or failure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shield constructs quick-witted combined type bearing counterforce device that originates can prevent effectively that the shield from constructing the machine and taking place the lateral rotation to provide powerful holding power, realize that the shield constructs quick-witted safety, originates.
In order to achieve the purpose, the utility model provides a composite bearing counterforce device for starting of a shield machine, which comprises a concrete bracket, a steel rail, a front counterforce frame, a rear counterforce frame, a connecting steel ring, an inclined strut, counterforce feet and anchoring steel bars; the concrete bracket is of a reinforced concrete structure, and the top surface of the concrete bracket is provided with an arc-shaped groove matched with the shield tunneling machine; the steel rail is pre-embedded in the concrete bracket; the front reaction frame and the rear reaction frame are connected through a plurality of force transmission beams, and the bottoms of the front reaction frame and the rear reaction frame are fixed on the concrete bracket; the connecting steel ring is a circular ring matched with the duct piece and is connected with the duct piece and the front reaction frame through bolts; the top end of the inclined strut is connected with the rear counterforce frame bolt, and the bottom end of the inclined strut is connected with the counterforce foot bolt; the reaction foot is anchored on the concrete bracket through the anchoring steel bar.
Furthermore, the front reaction frame and the rear reaction frame respectively comprise an upper beam, a main beam, an upper inclined strut and a lower inclined strut; the upper beam is positioned above the concrete bracket; the bottom end of the main beam is fixed on the concrete bracket; two ends of the upper inclined strut are respectively fixedly connected with the end part of the upper beam and the top end of the main beam; and two ends of the lower inclined strut are respectively fixedly connected with the main beam and the concrete bracket.
Further, the bottom end of the main beam is connected with an anchoring pile embedded in the concrete bracket through a bolt; and the force transfer beam is connected with the bottom end of the lower inclined strut in the front reaction frame and the bottom end of the lower inclined strut in the rear reaction frame and is anchored with the concrete bracket through the anchoring steel bar.
Further, the upper beam, the main beam, the upper inclined strut and the lower inclined strut are connected through bolts.
Furthermore, the force transfer beam is connected with the front reaction frame and the rear reaction frame through bolts.
Further, the inclined strut comprises a first inclined strut and a second inclined strut; the second inclined strut is positioned below the first inclined strut.
The utility model has the advantages that:
the shield constructs the machine and is located the arc recess of concrete bracket top surface, after shield constructs the quick-witted blade disc contact soil body and begins to rotate, the arc recess that matches with the shield constructs the machine has increased the contact surface between shield structure machine and the concrete bracket, thereby increased the frictional force between shield structure machine and the concrete bracket, the shield structure machine to the resistance to reverse moment of torsion has been strengthened, can prevent more effectively that the shield structure machine from taking place the lateral rotation, and compare with the bracket of originating of current steel construction, concrete bracket and concrete bottom plate pour into an organic whole structure, can effectively avoid the too big bracket that causes of frictional force between shield structure machine and the concrete bracket to take place the sidesway. The structure of the double-layer reaction frame of the front reaction frame and the rear reaction frame is adopted, stronger supporting force can be provided, deformation is small after the reaction force of the shield machine transmitted by the connecting steel ring is received, and the stability of the shield machine in the starting process can be ensured. According to the structure, the utility model provides a shield constructs quick-witted combined type bearing counterforce device of originating gets up concrete bracket and steel construction counterforce frame structure, can realize that the shield constructs quick-witted safety, originates.
Drawings
Fig. 1 is a front view of a shield tunneling machine initiation composite bearing counterforce device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection between the lower diagonal brace and the concrete bracket of the shield machine originating composite bearing counterforce apparatus shown in FIG. 1;
FIG. 3 is a top view of the shield tunneling machine originating compound bearing reaction apparatus shown in FIG. 1;
FIG. 4 is a diagram showing the relationship between the position of a steel rail and a concrete bracket in the initial composite bearing reaction device of the shield tunneling machine shown in FIG. 1;
fig. 5 is a schematic structural diagram of a front reaction frame and a rear reaction frame in the starting composite bearing reaction device of the shield tunneling machine shown in fig. 1.
In the figure: 1-a concrete bracket; 2-steel rail; 3-front reaction frame; 4-rear reaction frame; 5-connecting a steel ring; 6-reaction foot; 7-anchoring reinforcing steel bars; 8-a transfer beam; 9-upper beam; 10-a main beam; 11-upper inclined strut; 12-lower inclined strut; 13-anchor piles; 14-a first diagonal brace; 15-second diagonal brace.
Detailed Description
The embodiment provides a composite bearing reaction force device for starting of a shield machine, which comprises a concrete bracket 1, a steel rail 2, a front reaction force frame 3, a rear reaction force frame 4, a connecting steel ring 5, an inclined strut, a reaction force foot 6 and an anchoring steel bar 7; the concrete bracket 1 is of a reinforced concrete structure, and the top surface of the concrete bracket is provided with an arc-shaped groove matched with the shield tunneling machine; the steel rail 2 is pre-embedded in the concrete bracket 1; the front reaction frame 3 and the rear reaction frame 4 are connected through a plurality of force transfer beams 8, and the bottoms of the force transfer beams are fixed on the concrete bracket 1; the connecting steel ring 5 is a circular ring matched with the duct piece and is connected with the duct piece and the front reaction frame 3 through bolts; the top end of the inclined strut is connected with the rear counterforce frame 4 through a bolt, and the bottom end of the inclined strut is connected with the counterforce foot 6 through a bolt; the reaction foot 6 is anchored to the concrete bracket 1 by means of an anchoring bar 7.
The concrete bracket 1 is a main bearing unit of the weight of the shield tunneling machine; the steel rail 2 is a contact rigid part for integral translation of the shield body and adopts a 43 or 50 standard steel rail; the front reaction frame 3, the rear reaction frame 4 and the force transfer beam 8 are main reaction units in the propelling process of the shield tunneling machine; the diagonal brace transmits the force from the rear reaction frame 4 to the reaction leg 6, and then to the concrete bracket 1 via the reaction leg 6. The reaction foot 6 is right triangle's steel construction, and the inclined plane laminating is connected at concrete bracket 1, right-angle face and the bottom of bracing, and anchor reinforcing bar 7 stretches into in the reaction foot 6 to concreting. The shield constructs the machine and is located the arc recess of concrete bracket 1 top surface, after shield constructs quick-witted blade disc contact soil body and begins to rotate, the arc recess that matches with the shield constructs the machine has increased the contact surface between shield structure machine and the concrete bracket 1, thereby increased the frictional force between shield structure machine and the concrete bracket 1, the resistance to reverse moment of torsion of shield structure machine has been strengthened, can prevent more effectively that the shield structure machine from taking place the lateral rotation, and compare with the bracket of originating of current steel construction, concrete bracket 1 pours into an organic whole structure with the concrete bottom plate, can effectively avoid the too big bracket that causes of frictional force between shield structure machine and the concrete bracket 1 to take place the sidesway. The structure of the double-layer reaction frame of the front reaction frame 3 and the rear reaction frame 4 is adopted, stronger supporting force can be provided, the deformation is small after the reaction force of the shield machine transmitted by the connecting steel ring 5 is received, and the stability of the shield machine in the starting process can be ensured.
Further, the front reaction frame 3 and the rear reaction frame 4 both comprise an upper beam 9, a main beam 10, an upper inclined strut 11 and a lower inclined strut 12; the upper beam 9 is positioned above the concrete bracket 1; the bottom end of the main beam 10 is fixed on the concrete bracket 1; two ends of the upper inclined strut 11 are respectively fixedly connected with the end part of the upper beam 9 and the top end of the main beam 10; two ends of the lower inclined strut 12 are respectively fixedly connected with the main beam 11 and the concrete bracket 1. The upper beam 9, the main beam 10, the upper inclined strut 11 and the lower inclined strut 12 enclose a synthetic octagonal frame structure, the structural strength of the front reaction frame 3 and the rear reaction frame 4 is increased, the contact area between the front reaction frame 3 and the connecting steel ring 5 is increased, and the connection with the connecting steel ring 5 is facilitated.
Further, the bottom end of the main beam 10 is in bolted connection with an anchor pile 13 pre-embedded in the concrete bracket 1; the force transfer beam 8 connecting the bottom ends of the lower inclined struts 12 in the front reaction frame 3 and the bottom ends of the lower inclined struts 12 in the rear reaction frame 4 is anchored with the concrete bracket 1 through the anchoring reinforcing steel bars 7.
Further, the upper beam 9, the main beam 10, the upper diagonal brace 11, and the lower diagonal brace 12 are connected by bolts.
Furthermore, the force transfer beam 8 is connected with the front reaction frame 3 and the rear reaction frame 4 through bolts. The transfer beam 8 comprises a horizontal beam arranged horizontally and an oblique beam arranged obliquely.
Further, in order to provide a stronger supporting force, the sprag includes a first sprag 14 and a second sprag 15; the second diagonal brace 15 is located below the first diagonal brace 14.
In conclusion, the composite bearing counterforce device for starting the shield machine combines the concrete bracket 1 and the counterforce frame of the steel structure together, effectively prevents the shield machine from rotating laterally, realizes quick and safe starting of the shield machine, has ingenious design, can be repeatedly recycled by virtue of bolt connection, is simple and quick to assemble, improves the working efficiency and saves the cost.
The above is only the embodiment of the present invention, not limiting the scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the present invention, or directly or indirectly applied to other related technical fields, and all included in the same way in the protection scope of the present invention.
Claims (6)
1. A shield machine originating composite bearing counterforce device is characterized by comprising a concrete bracket, a steel rail, a front counterforce frame, a rear counterforce frame, a connecting steel ring, an inclined strut, counterforce feet and anchoring reinforcing steel bars;
the concrete bracket is of a reinforced concrete structure, and the top surface of the concrete bracket is provided with an arc-shaped groove matched with the shield tunneling machine;
the steel rail is embedded in the concrete bracket;
the front reaction frame and the rear reaction frame are connected through a plurality of force transfer beams, and the bottoms of the front reaction frame and the rear reaction frame are fixed on the concrete bracket;
the connecting steel ring is a circular ring matched with the duct piece and is connected with the duct piece and the front reaction frame through bolts;
the top end of the inclined strut is connected with the rear counterforce frame bolt, and the bottom end of the inclined strut is connected with the counterforce foot bolt;
the reaction foot is anchored on the concrete bracket through the anchoring steel bar.
2. The shield tunneling machine originating composite bearing counterforce apparatus of claim 1, wherein the front counterforce frame and the rear counterforce frame each comprise an upper beam, a main beam, an upper diagonal brace and a lower diagonal brace;
the upper beam is positioned above the concrete bracket;
the bottom end of the main beam is fixed on the concrete bracket;
two ends of the upper inclined strut are respectively fixedly connected with the end part of the upper beam and the top end of the main beam;
and two ends of the lower inclined strut are respectively fixedly connected with the main beam and the concrete bracket.
3. The shield tunneling machine originating composite bearing counterforce apparatus as claimed in claim 2, wherein the bottom end of the main beam is bolted to an anchor pile embedded in the concrete bracket;
and the force transfer beam is connected with the bottom end of the lower inclined strut in the front reaction frame and the bottom end of the lower inclined strut in the rear reaction frame and is anchored with the concrete bracket through the anchoring steel bar.
4. The shield tunneling machine originating composite bearing counterforce apparatus of claim 3, wherein the upper beam, main beam, upper diagonal brace and lower diagonal brace are connected by bolts.
5. The shield tunneling machine originating composite bearing counterforce apparatus of claim 1, wherein the transfer beam is bolted to both the front counterforce frame and the rear counterforce frame.
6. The shield tunneling machine originating composite bearing counterforce apparatus of claim 1, wherein the brace comprises a first brace and a second brace;
the second inclined strut is positioned below the first inclined strut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921175083.2U CN210370641U (en) | 2019-07-25 | 2019-07-25 | Shield constructs quick-witted combined type bearing counterforce device that starts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921175083.2U CN210370641U (en) | 2019-07-25 | 2019-07-25 | Shield constructs quick-witted combined type bearing counterforce device that starts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210370641U true CN210370641U (en) | 2020-04-21 |
Family
ID=70246165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921175083.2U Expired - Fee Related CN210370641U (en) | 2019-07-25 | 2019-07-25 | Shield constructs quick-witted combined type bearing counterforce device that starts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210370641U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049653A (en) * | 2020-10-27 | 2020-12-08 | 中铁工程装备集团有限公司 | Shield tunneling machine starting device and shield tunneling machine starting method |
| CN113216989A (en) * | 2021-04-29 | 2021-08-06 | 中南大学 | Shield constructs quick-witted reaction frame suitable for ramp of growing up starts |
-
2019
- 2019-07-25 CN CN201921175083.2U patent/CN210370641U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049653A (en) * | 2020-10-27 | 2020-12-08 | 中铁工程装备集团有限公司 | Shield tunneling machine starting device and shield tunneling machine starting method |
| CN112049653B (en) * | 2020-10-27 | 2022-11-01 | 中铁工程装备集团有限公司 | Shield tunneling machine starting device and shield tunneling machine starting method |
| CN113216989A (en) * | 2021-04-29 | 2021-08-06 | 中南大学 | Shield constructs quick-witted reaction frame suitable for ramp of growing up starts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |