CN112081596A - Reaction frame structure of shield starting well - Google Patents

Abstract

The invention provides a shield starting shaft reaction frame structure, belonging to the technical field of shield shaft reaction frame, comprising a plurality of anchor rods, two connecting columns and a support seat. A plurality of anchor rods are used for anchoring into the formation on one side of the originating well, and the anchoring direction of the multiple anchor rods is set in the same direction as the jacking direction of the pipe jacking. Two connecting columns are used to be installed on both sides of the bottom of the starting shaft, and reinforcing meshes are arranged in the connecting columns. The connecting columns are filled with concrete for fixing the steel mesh and several anchors. The support base is located between the two connecting columns, two sides of the reaction force frame are respectively connected and fixed with the two connecting columns, and the reaction force frame is used to provide reaction force for the jacking of the jacking pipe by means of a plurality of anchor rods. The multiple anchor rods anchored in the reaction frame structure of the shield starting shaft provided by the present invention can not only strengthen the stratum on one side of the starting shaft, but also provide the reaction force provided by the reaction frame for the shield machine, reducing the reaction The volume of space occupied by the force frame not only ensures the safety of construction, but also reduces the cost of investment.

Description

Shield starting shaft reaction frame structure

technical field

The invention belongs to the technical field of shield tunnel reaction force frame, and more specifically, relates to a shield tunnel starting shaft reaction force frame structure.

Background technique

In the construction of the shield method, the reaction force frame is an indispensable device that provides reaction force for the shield tunneling machine during the initiation of the shield. Its strength and rigidity are directly related to the smooth initiation of the shield machine. However, in the existing reaction frame structure, multiple support ribs are usually set at the rear, which makes the excavation required for the originating well larger, and the increase in the volume of the originating well requires reinforcement of the surrounding geology to avoid Collapse and other problems occur, so the existing construction method of the reaction frame has a large amount of engineering and a high construction cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a shield starting shaft reaction frame structure, which aims to solve the problems of large engineering quantity and high construction cost of constructing the reaction frame in the starting shaft.

In order to achieve the above-mentioned purpose, the technical scheme adopted in the present invention is: provide a shield starting shaft reaction frame structure, including:

A plurality of anchor rods are used for anchoring into the formation on one side of the originating well, and the anchoring directions of the plurality of anchor rods are set in the same direction as the jacking direction of the pipe jacking;

Two connecting columns are used to be installed on both sides of the bottom of the starting well, and reinforcing meshes are arranged in the connecting columns, and the reinforcing meshes are used for welding and fixing with a plurality of the anchor rods on the same side; the connecting columns Concrete for fixing the steel mesh and a plurality of the anchor rods is poured inside;

A support seat is located between the two connecting columns, a reaction force frame is placed on the support seat, two sides of the reaction force frame are respectively connected and fixed with the two connection columns, and the reaction force frame is fixed by means of multiple Each of the anchor rods is used to provide a reaction force to the jacking of the jacking pipe.

As another embodiment of the present application, a plurality of the anchor rods are parallel to each other, and are arranged laterally spaced from top to bottom.

As another embodiment of the present application, a connecting plate is fixed on the bottom of the reinforcing mesh, and the connecting plate is used to be installed on the starting shaft.

As another embodiment of the present application, a reinforcing rib is connected between the tops of the two connecting columns, the reinforcing rib is an I-beam, and the two ends of the I-beam are welded and fixed to the two steel meshes respectively. .

As another embodiment of the present application, tension discs are fixed at the ends of a plurality of anchor rods located on one side of the originating well, and the tension discs are vertically arranged inside the connecting column.

As another embodiment of the present application, the two sides of the reaction force frame are provided with a plurality of avoidance grooves for avoiding a plurality of the anchor rods; the top of the reaction force frame is provided with a space for the I-shaped space. Steel give way.

As another embodiment of the present application, a plurality of reinforcing blocks are provided on the side of the connecting column, and the plurality of reinforcing blocks are used to abut against the side wall of the originating well.

As another embodiment of the present application, the two reinforcing blocks are extended toward each other, and the connecting column and the reinforcing block are matched for clamping the reaction force frame.

As another embodiment of the present application, a fastening rod is connected between the connecting column and the reaction force frame, and the fastening rod is arranged through the connecting column and the reaction force frame in sequence.

As another embodiment of the present application, a reinforcement sleeve is sleeved on the outer peripheral surface of the anchor rod at the originating well, one end of the reinforcement sleeve is used for fixing on the side wall of the originating well, and the other end is used for connecting with the originating well. Welded steel mesh.

The beneficial effect of the shield starting shaft reaction frame structure provided by the present invention is: compared with the prior art, in the shield starting shaft reaction frame structure of the present invention, a plurality of anchor rods are anchored on one side of the starting shaft , the bolt is anchored into the formation. Two connecting columns are installed on both sides of the bottom of the starting shaft. The steel mesh in the connecting column is welded and fixed with a plurality of anchor rods, and the reliable connection between the steel mesh and the anchor rods is ensured by pouring concrete. A support seat is arranged between the two connecting columns, a reaction force frame is placed on the support seat, and at the same time, the reaction force frame is connected and fixed with the two connecting columns respectively.

When in use, by anchoring multiple anchor rods into the stratum on one side of the originating well, during the pipe jacking construction process, the shield machine will generate a force on the reaction force frame, and the force of the reaction force frame will act on the two On the connecting column, since the anchoring direction of the plurality of bolts is set in the same direction as the jacking pipe, the connecting column can be kept stable relative to the originating well under the action of the plurality of bolts. The support seat is used to support the reaction frame, which prevents the anchor rod from bearing the deviating force and ensures that it can be stable in the formation. In the present application, the multiple anchor rods anchored can not only strengthen the stratum on one side of the originating well, but also provide a reaction force for the jacking of the pipe jacking. It reduces the volume of space occupied by the reaction frame, which not only ensures the safety of construction, but also reduces the cost of investment.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a shield starting shaft reaction frame structure according to an embodiment of the present invention;

Fig. 2 is the connection schematic diagram of the reaction force frame and the connecting column provided by the second embodiment of the present invention;

Fig. 3 is the connection schematic diagram of the I-beam provided by the second embodiment of the present invention and the connecting column;

Fig. 4 is the connection schematic diagram of the support base and the reaction force frame provided by the third embodiment of the present invention;

FIG. 5 is a schematic diagram of the connection between the anchor rod and the reinforcing sleeve according to the fourth embodiment of the present invention.

In the figure: 1. Starting well; 2. Connecting column; 3. Anchor rod; 4. Tension plate; 5. Reaction frame; 6. Reinforcing block; 7. I-beam; 8. Giving way; 9. Avoiding Slot; 10, connecting plate; 11, supporting seat; 12, connecting rib; 13, fixing plate; 14, reinforcing mesh; 15, connecting seat; 16, reinforcing sleeve.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Please refer to FIG. 1 , FIG. 3 and FIG. 4 , the structure of the reaction frame of the shield starting shaft provided by the present invention will now be described. The shield starting shaft reaction frame structure includes a plurality of anchor rods 3 , two connecting columns 2 and a support base 11 . A plurality of anchor rods 3 are used for anchoring into the formation on one side of the originating well 1 , and the anchoring direction of the plurality of anchor rods 3 is set in the same direction as the jacking direction of the pipe jacking. The two connecting columns 2 are used to be installed on both sides of the bottom of the originating shaft 1, and the connecting columns 2 are provided with reinforcing meshes 14, which are used for welding and fixing with multiple anchor rods 3 on the same side; There is concrete for fixing the reinforcement mesh 14 and the plurality of anchor rods 3 . The support base 11 is located between the two connecting columns 2, and a reaction force frame 5 is placed on the support base 11. Both sides of the reaction force frame 5 are respectively connected and fixed with the two connection columns 2. It is used to provide a reaction force to the jacking of the jacking pipe.

The beneficial effect of the shield starting shaft reaction frame structure provided by the present invention is: compared with the prior art, in the shield starting shaft reaction frame structure of the present invention, a plurality of anchors are anchored on one side of the starting shaft 1 Rod 3, anchor rod 3 is anchored into the formation. Two connecting columns 2 are installed on both sides of the bottom of the starting shaft 1 . The reinforcing meshes 14 in the connecting columns 2 are welded and fixed with multiple anchor rods 3 , and the reliable connection between the reinforcing meshes 14 and the anchor rods 3 is ensured by pouring concrete. A support base 11 is provided between the two connecting columns 2 , and a reaction force frame 5 is placed on the support base 11 , and at the same time, the reaction force frame 5 is connected and fixed to the two connecting columns 2 respectively.

In use, by anchoring a plurality of anchor rods 3 into the stratum on one side of the originating shaft 1, during the pipe jacking construction process, the shield machine will generate a force on the reaction force frame 5, and the force of the reaction force frame 5 will Acting on the two connecting columns 2, since the anchoring direction of the multiple anchor rods 3 is set in the same direction as the jacking direction of the jacking pipe, the connecting column 2 can be kept relative to the originating well 1 under the action of the multiple anchor rods 3 Stablize. The support base 11 is used to support the reaction force frame 5, so as to prevent the anchor rod 3 from being subjected to a deviating force, and to ensure that it can be stabilized in the formation. In the present application, the multiple anchor rods 3 that are anchored can not only strengthen the formation on one side of the originating well 1 , but also provide reaction force for the jacking of the pipe jacking. Compared with the support ribs, the space volume required by the reaction force frame 5 is reduced, which not only ensures the safety of construction, but also reduces the cost input.

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 2 , a plurality of anchor rods 3 are parallel to each other, and are arranged horizontally spaced from top to bottom. First, the two sides of the originating well 1 are respectively the completed section that has been jacked and the unfinished section that has not been jacked. In order to facilitate the installation of equipment, the length and width of the originating shaft 1 are generally larger than the inner diameter of the completed section that has been jacked into construction. Since there are many unknown factors in the unfinished section of the stratum, it is necessary to reinforce the stratum during the jacking construction, especially for areas prone to landslides such as sand and gravel. In order to avoid collapse of the side wall of the originating well 1 due to damage, multiple anchor rods 3 are anchored in the unconstructed section, and the multiple anchor rods 3 are arranged horizontally and at intervals from top to bottom. Multiple anchor rods 3 are distributed on both sides of the central axis of the originating shaft 1, and the multiple anchor rods 3 are arranged in parallel with each other, thereby improving the safety of the originating well 1, and the set anchor rods 3 can be based on the original foundation. , reducing the cost of strengthening the surrounding strata and improving the efficiency of construction.

In order to prevent the anchor rod 3 from receiving a force deviating from its own axis, it should be ensured that the anchor rod 3 is arranged parallel to the axis of the jacking pipe. At the same time, the bolt 3 in this application is an expanded body bolt 3 , the flared end of the bolt 3 is located in the formation, and the top end of the bolt 3 is located in the originating well 1 . Moreover, the direction of the bolt 3 from the flared end to the top end is parallel and opposite to the direction in which the jacking pipe is jacked, so that the reaction force frame 5 can be kept relatively stable under the action of the plurality of bolts 3 .

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 2 , FIG. 3 and FIG. 4 , the bottom of the reinforcement mesh 14 is fixed with a connecting plate 10 , and the connecting plate 10 is used to install on the On the originating well 1. The number of the connecting columns 2 is two, and the two connecting columns 2 are arranged in parallel. The connecting column 2 is a concrete part including a steel mesh 14 inside. The steel mesh 14 is placed in the formwork, and then concrete is poured into the formwork. After the concrete is cured and formed, the connecting column 2 is formed. In order to improve the connection strength between the connecting column 2 and the anchor rod 3 and ensure the stability of the connection between the connecting column 2 and the anchor rod 3, the end of the anchor rod 3 and the steel mesh 14 can be welded and fixed before pouring concrete, and then poured together. , so as to form an integrated structure.

The two connecting columns 2 are installed at the bottom of the originating well 1 , in order to facilitate the connection and at the same time improve the connection force between the connecting columns 2 and the originating well 1 . The connecting plate 10 can be fixed by welding on the bottom of the reinforcing mesh 14 . After the connecting plate 10 is welded and fixed with the steel mesh 14 and cast into a shape, a unified whole can be formed, which improves the connection strength of the entire connecting column 2 and the originating shaft 1 . In the actual installation process, multiple bolts may be pre-embedded in the originating well 1 or multiple expansion bolts may be fixed. The connecting plate 10 is connected and fixed with a plurality of embedded bolts or a plurality of expansion bolts.

In order to improve the connection strength between the connecting plate 10 and the connecting column 2 , first the connecting plate 10 is located at the bottom of the connecting column 2 , and a plurality of connecting ribs 12 are fixed on the connecting plate 10 , and the plurality of connecting ribs 12 are along the length of the connecting column 2 . A fixed plate 13 is arranged on the top of the connecting column 2, the fixed plate 13 is connected and fixed with a plurality of connecting ribs 12, and a stable connection structure is formed by the connecting plate 10, a plurality of connecting ribs 12 and the fixed plate 13, which avoids When the connecting column 2 bears a large force and deviates from the vertical direction, the connection between the connecting plate 10 and the connecting column 2 fails, and the connecting rib 12 is welded and fixed to the welding mesh, which improves the strength of the entire connecting column 2 .

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 1 to FIG. 5 together, a reinforcing rib is connected between the tops of the two connecting columns 2, and the reinforcing rib is an I-shaped The two ends of the steel 7 and the I-beam 7 are welded and fixed with the two steel meshes 14 respectively. The two connecting columns 2 are parallel to each other and are arranged at intervals. In order to improve the connection strength between the two connecting columns 2 and ensure the stability of their position relative to the originating well 1, I-beams are connected and fixed at the tops of the two connecting columns 2. 7. The connection strength of the I-beam 7 is high, and at the same time, it is easy to obtain and process, in order to improve the connection strength of the I-beam 7 and the two connection columns 2 . The I-beam 7 and the reinforcing mesh 14 in the connecting column 2 are welded and fixed, and when the reinforcing mesh 14 is poured, the I-beam 7 is poured together.

Because the effective area of the connection between the steel mesh 14 and the I-beam 7 is low, even if they are cast together, the problem of unreliable connection still exists due to the low strength of the concrete. The positioning rod is abutted on the outside of the steel mesh 14. After the casting is formed, the positioning rod and the steel mesh 14 are embedded in the interior of the concrete, and the positioning rod is fixed on the I-beam 7, which ultimately improves the overall connection strength.

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 1 , the ends of a plurality of anchor rods 3 located on one side of the starting shaft 1 are fixed with tension disks 4, and the tension disks 4 is vertically arranged inside the connecting column 2 . In order to further improve the connection stability of the plurality of anchor rods 3 and the connecting columns 2, the steel meshes 14 on the anchor rods 3 and the connecting columns 2 are prevented from slipping off. Tension discs 4 are connected to the ends of the multiple anchor rods 3 located on one side of the originating shaft 1 , and the multiple tension discs 4 are poured into the connecting column 2 together with the reinforcing mesh 14 . After the concrete is cured and formed, the tension discs are formed. 4 can be stably fixed in the connecting column 2. At the same time, due to the provision of the tension disc 4 , multiple anchor rods 3 can act on the connecting column 2 at the same time, ensuring that the acting forces of the multiple anchor rods 3 on the connecting column 2 remain relatively equal, ensuring normal operation.

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 2 and FIG. 4 , the two sides of the reaction frame 5 are provided with a plurality of holes for avoiding a plurality of anchor rods 3 Avoidance groove 9; the top of the reaction force frame 5 is provided with an escape groove 8 for giving way to the I-beam 7. Avoidance grooves 9 are provided on both sides of the reaction force frame 5 for installing the reaction force frame 5 after connecting the anchor rod 3, and the escape groove 8 is provided on the top of the reaction force frame 5 to improve the integration level of the device.

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 1 and FIG. 5 , a plurality of reinforcing blocks 6 are provided on the side of the connecting column 2, and the plurality of reinforcing blocks 6 are used to resist against the side wall of the originating well 1. In order to avoid the problem that the connecting column 2 cannot be stably supported by only passing through multiple anchor rods 3, a plurality of reinforcing blocks 6 are provided on one side of the connecting column 2 away from the multiple anchor rods 3, and the reinforcing block 6 can be a prefabricated component , which can be rigid metal blocks or prefabricated concrete blocks. The reinforcing block 6 can be cast and formed together with the connecting column 2 . One side of the reinforcing block 6 abuts on the inner wall of the starting shaft 1, and the other side is fixed on the side surface of the connecting column 2. By setting a plurality of reinforcing blocks 6, the bearing of the connecting column 2 in the jacking direction of the jacking pipe is improved. force, thereby ensuring the service life of the connecting column 2.

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 1 and FIG. 5 , the two reinforcing blocks 6 are extended toward each other, and the connecting column 2 and the reinforcing block 6 are matched to be clamped in the opposite direction. Force frame 5. In order to stably clamp the reaction force frame 5, so that the reaction force frame 5 can stably bear the force of the shield machine during operation, firstly, the reinforcing block 6 is arranged between the connecting column 2 and the side wall of the starting shaft 1, and is opposite to The two reinforcing blocks 6 extend toward each other. The reinforcing block 6 extends to the outside of the connecting column 2 so that a side surface of the reinforcing block 6 close to the anchor rod 3 and the side surface of the connecting column 2 close to the reinforcing block 6 form a snap groove, and the reaction force frame 5 is snap fit with the snap groove. By setting the reinforcing block 6, the reaction force frame 5 not only bears the force of the connecting column 2, but also bears the acting force of the reinforcing block 6, that is, the reinforcing block 6 and the connecting column 2 are used to support the stable reaction force frame 5 together to ensure The reliability of the connection is ensured, and the damage of the anchor rod 3 is avoided.

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 4 , a fastening rod is connected between the connection column 2 and the reaction force frame 5, and the fastening rod penetrates through the connection column in turn. 2 and the reaction frame 5 are set. In this application, in order to avoid the failure of the connection between the reaction force frame 5 and the connecting column 2 and the reinforcing block 6, through holes are formed on both the reaction force frame 5 and the connecting column 2. Therefore, the separation of the reaction force frame 5 and the connecting column 2 is avoided, and the safety is ensured.

As a specific embodiment of the shield starting shaft reaction frame structure provided by the present invention, please refer to FIG. 5 , the outer peripheral surface of the anchor rod 3 located in the starting shaft 1 is covered with a reinforcing sleeve 16, and one end of the reinforcing sleeve 16 is used for fixing On the side wall of the starting well 1, the other end is used for welding and fixing with the steel mesh 14. Since the diameter of the anchor rod 3 is small, although the number of anchor rods 3 provided in this application is multiple, since the anchor rod 3 is a standard part, the increase in the diameter of the anchor rod 3 will greatly increase the anchorage of the anchor rod 3 The difficulty of the drilling rig is also put forward higher requirements. For this purpose, a reinforcement sleeve 16 can be fitted on the bolt 3 located at the starting well. One end of the reinforcing sleeve 16 can be connected and fixed with the connecting column 2 , and the other end can be connected and fixed with the side wall of the starting well opposite to the connecting column 2 . A connecting seat 15 is connected to the end of the reinforcing sleeve 16 away from the connecting column 2 . The connecting seat 15 is welded and fixed to the end of the reinforcing sleeve 16 and is respectively connected to the side wall of the originating well 1 by bolts. Since the reinforcing sleeve 16 is provided, the force of the connecting column 2 on the anchor rod 3 can be shared, so that the connecting column 2 is jointly supported and stabilized by the reinforcing sleeve 16 and the anchor rod 3 . In the present application, when the reinforcing sleeve 16 is provided, the stability of the connecting column 2 can be greatly improved, the size of the excavation required for the originating well 1 is reduced, the engineering cost is reduced, and the construction efficiency is improved.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (10)

1. Shield constructs well reaction frame structure of starting, its characterized in that includes:

the anchor rods are used for anchoring into the stratum on one side of the starting well, and the anchoring directions of the anchor rods are the same as the jacking direction of the jacking pipe;

the two connecting columns are used for being installed on two sides of the bottom of the starting well, reinforcing meshes are arranged in the connecting columns, and the reinforcing meshes are used for being welded and fixed with the anchor rods on the same side; concrete for fixing the reinforcing mesh and the anchor rods is poured into the connecting column;

the supporting seat is located two between the spliced pole, placed the reaction frame on the supporting seat, the both sides of reaction frame respectively with two the spliced pole is connected fixedly, the reaction frame is used for providing the counter-force to the jacking of push pipe with the help of a plurality of stock.

2. The shield originating well reaction frame structure of claim 1, wherein the plurality of anchor rods are parallel to each other and are laterally spaced from top to bottom.

3. The shield launching well reaction frame structure of claim 1, wherein a connection plate is fixed to the bottom of the mesh reinforcement, and the connection plate is used for being installed on the launching well.

4. The shield starting well reaction frame structure as claimed in claim 1, wherein a reinforcing rib is connected between the tops of the two connecting columns, the reinforcing rib is an i-shaped steel, and two ends of the i-shaped steel are respectively welded and fixed with the two reinforcing mesh.

5. The shield starting well reaction frame structure of claim 1, wherein tension discs are fixed to the ends of the plurality of anchor rods positioned at one side of the starting well, and the tension discs are vertically arranged inside the connecting column.

6. The shield starting well reaction frame structure as claimed in claim 4, wherein a plurality of avoiding grooves for avoiding a plurality of anchor rods are formed on two side edges of the reaction frame; the top of the reaction frame is provided with a yielding groove for yielding the I-shaped steel.

7. The shield starter well reaction frame structure of claim 1 wherein the connecting column is provided with a plurality of reinforcing blocks on its side for abutting against the sidewall of the starter well.

8. The shield starting well reaction frame structure of claim 7, wherein two of the reinforcing blocks extend toward each other, and the connecting column and the reinforcing blocks cooperate to clamp the reaction frame.

9. The shield originating well reaction frame structure of claim 1, wherein a fastening rod is connected between the connecting column and the reaction frame, and the fastening rod is sequentially disposed through the connecting column and the reaction frame.

10. The shield launching well reaction frame structure of claim 1, wherein the anchor rod is sleeved with a reinforcing sleeve on the outer circumferential surface of the launching well, one end of the reinforcing sleeve is used for being fixed on the side wall of the launching well, and the other end of the reinforcing sleeve is used for being welded and fixed with the reinforcing mesh.

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