CN219157638U - Pile type ground wall joint - Google Patents
Pile type ground wall joint Download PDFInfo
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- CN219157638U CN219157638U CN202320008446.3U CN202320008446U CN219157638U CN 219157638 U CN219157638 U CN 219157638U CN 202320008446 U CN202320008446 U CN 202320008446U CN 219157638 U CN219157638 U CN 219157638U
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Abstract
The utility model provides a pile column type wall-connected node, which is a large-diameter bored pile poured at the wall-connected node, wherein the bottom of the bored pile is lower than the elevation of the bottom of the wall-connected node, the part of the bored pile below the elevation of the bottom of the wall-connected node is a built-in section, the cross section of the built-in section is circular, the part of the bored pile above the elevation of the bottom of the wall-connected node is a notch section, and each wall-connected notch section which is opposite to the node is respectively provided with a corresponding joint notch. The pile is constructed in advance, the joint notch on the pile is milled together in the later-stage diaphragm wall construction, and the slot hole is not required to be excavated by a slot milling machine in the node construction, so that the hole collapse phenomenon and the flow around problem in the concrete pouring process in the traditional process construction are fundamentally avoided, and the impervious effect at the joint notch is good; the pile type node has high rigidity, high construction speed and low cost.
Description
Technical Field
The utility model belongs to the technical field of underground diaphragm wall construction, and relates to a pile type underground diaphragm wall node structure.
Background
The underground continuous wall (underground continuous wall) has strong integrity, high rigidity, high strength and good water-proof performance, and is widely applied to underground building enclosures, and is also commonly used for underground foundations of structures such as large-scale buildings, suspension bridge anchorage and the like. The underground wall as the underground foundation is generally formed by a plurality of crisscross underground walls in a grid shape, the intersection of two or more underground walls is the node of the underground wall, and the structure of the node is in the form of cross, T-shaped, Y-shaped or L-shaped and the like.
In order to facilitate construction and ensure construction safety, the diaphragm wall is generally constructed in stages and sections. And constructing the first-stage wall section at a position which is separated from the node in advance, constructing the second-stage wall section between the node and the first-stage wall section, and connecting the node and the first-stage wall section to form a continuous wall body. During node construction, slots with corresponding structures are required to be excavated, then reinforcement cages are lowered, and concrete is poured. Fig. 1 is a schematic structural diagram of a cross-shaped node, in which a slot milling machine is required to excavate a cross-shaped slot 10 in the prior art during construction, but because a right angle external corner exists in the slot, the external corner is easy to collapse during the excavation process, so that larger potential safety hazards are brought to ground equipment and personnel, and once the collapse hole occurs, the collapse part is required to be backfilled and reinforced with surrounding foundations, secondary slot forming is performed, so that the construction period is long, and the construction cost is increased. The same problem exists for T-type, Y-type, L-type nodes, etc.
In addition, prior art is when pouring node concrete, need set up the joint groove in the junction of node and second period wall section to adopt joint case sealedly, prevent that the concrete from bypassing the joint case outside, this is extremely high to the straightness that hangs down of joint groove and steel reinforcement cage machining precision requirement, and need consolidate the cell wall, because once the reaming appears in joint department, produces the bypass when leading to concrete placement, can influence second period tank section steel reinforcement cage and transfer, consequently increased node slotted hole construction degree of difficulty.
In order to solve the problem of hole collapse during notch excavation, patent CN211228460U discloses a frame type underground continuous wall groove section structure, and the technical scheme adopted by the method is that a groove expansion is arranged at a cross node, namely the excavation cross section at the node is enlarged, the method only reduces the risk of hole collapse to a certain extent, but also increases the construction amount of excavation and backfilling, increases the volume of a reinforcement cage at the node, greatly increases the construction cost, and still cannot solve the flow around phenomenon which is easy to generate during concrete pouring.
Disclosure of Invention
The utility model aims to solve the problems, and provides a pile type ground connecting wall node, which is used for avoiding collapse during construction at the node, ensuring construction safety, improving verticality precision at a joint groove and avoiding a bypass phenomenon during concrete pouring.
The technical scheme of the utility model is as follows:
the utility model provides a stake formula ground even wall node which characterized in that: the ground continuous wall node is a large-diameter bored pile poured at the ground continuous wall node position, the bottom of the bored pile is lower than the bottom elevation of the ground continuous wall, the top of the bored pile is flush with the top elevation of the ground continuous wall, the part of the bored pile below the bottom elevation of the ground continuous wall is a built-in section, the cross section of the built-in section is circular, the part of the bored pile above the bottom elevation of the ground continuous wall is a notch section, the cross section of the notch section is arranged according to the shape of the node, corresponding notches are respectively arranged on the side wall of the notch section and opposite to each connected ground continuous wall groove section, the cross section of each notch is U-shaped, and the width of each notch is equal to the thickness of the ground continuous wall; the reinforced pile is characterized in that a reinforcement cage is arranged in the bored pile, the cross section of the reinforcement cage, which is positioned at the embedded section of the bored pile, is circular, a corresponding groove is formed in the side wall of the reinforcement cage, which is positioned at the notch section, corresponding to each notch, and the bored pile is provided with a reinforcement protection layer with a certain thickness.
Compared with the prior art, the utility model has the following advantages:
(1) The safety is good. The bored pile is adopted as a node, the bored pile is poured firstly during construction, then the joint groove is milled on the bored pile, so that the phenomenon of hole collapse which easily occurs during the grooving section in the prior art is fundamentally avoided, and the construction safety is ensured.
(2) The construction difficulty is low. The bored pile process is very mature, and based on the maturity of the milling joint, the perpendicularity of the joint groove can reach 1/1000, which is far greater than 1/400 of the standard requirement, so that the phenomenon of flow around during concrete pouring can be effectively avoided, and the anti-leakage effect of the joint is ensured.
(3) The bending resistance of the node is good. The bored pile has high rigidity, and the vertical bending resistance of the node can be further improved by lengthening the pile foundation and arranging the embedded section.
(4) The economic benefit is good. Compared with the conventional node, the scheme does not need to independently reinforce the wall of the node groove, and simultaneously does not need to independently design, process, transport, manufacture and lower the joint steel box, so that the construction cost is lower.
(5) The construction speed is high. The pile type node is adopted, so that large-area construction can be carried out by organizing a rotary drilling machine and a slot milling machine, and the construction progress of the underground continuous wall is quickened.
(6) The application mode is flexible. The wall is connected with a longer length, and the construction of dividing the wall into a plurality of groove sections can be adopted, so that the problem of poor impermeability at the joints of the first period and the second period of the wall is avoided in the traditional process.
Drawings
FIG. 1 is a schematic view of a prior art slotted hole structure excavated during construction of a wall joint;
FIG. 2 is a schematic elevational view of one embodiment of the utility model;
FIG. 3 is a schematic cross-sectional view of a setting section of a pile node;
FIG. 4 is a schematic cross-sectional view of a slot segment of the present utility model in the form of a cross-shaped node;
FIG. 5 is a schematic cross-sectional view of a slot segment of the present utility model in the form of a T-node;
FIG. 6 is a schematic cross-sectional view of a slot segment of the present utility model at a Y-node;
FIG. 7 is a schematic cross-sectional view of a slot segment of the present utility model with an in-line node;
FIG. 8 is a schematic diagram of the application state of the present utility model when the present utility model is a cross-shaped node;
FIG. 9 is a schematic diagram of the application state of the present utility model when it is a T-node;
FIG. 10 is a schematic diagram of the application state of the present utility model when the present utility model is a Y-node;
fig. 11 is a schematic diagram of an application state when the present utility model is a line node.
Detailed Description
As shown in fig. 2 and 3, the pile column type wall-connected node is a bored pile 1 poured at the wall-connected node position, the bottom of the bored pile is lower than the bottom elevation of the wall-connected wall, the top of the bored pile is flush with the top elevation of the wall-connected wall, the part of the bored pile 1 below the bottom elevation of the wall-connected wall is a built-in section 11, the cross section of the built-in section is circular, the part of the bored pile above the bottom elevation of the wall-connected wall is a notch section 12, the cross section of the notch section is arranged according to the shape of the node, each wall-connected groove section on the side wall of the notch section is provided with a corresponding notch 13, and the width of the notch is equal to the thickness of the wall-connected wall; the steel reinforcement cage 14 is arranged in the bored pile, the cross section of the part of the steel reinforcement cage, which is positioned on the embedded section of the bored pile, is round, the corresponding groove is arranged on the part, which is positioned on the notch section of the bored pile, of the steel reinforcement cage corresponding to each notch, and the bored pile is provided with a steel reinforcement protection layer with a certain thickness.
When the utility model is implemented, the number and the direction of the ground connection wall groove sections which are required to be connected can be set into cross shapes, T shapes, Y shapes, straight shapes and the like.
Fig. 4 shows a first specific embodiment of the utility model, the wall connecting node is in a cross shape and is used for connecting 4 crisscross wall connecting groove sections, and 4 notches 13 are arranged on the side wall of the notch section of the bored pile 1, which is opposite to the 4 wall connecting groove sections. The cross-sectional shape of the portion of the reinforcement cage 14 located in the pile slot section 12 is correspondingly set according to the cross-sectional shape of the slot section, corresponding grooves are formed in the reinforcement cage opposite to each slot, and a reinforcement protection layer with a certain thickness is arranged on the periphery of the reinforcement cage.
Fig. 5 shows a second specific embodiment of the utility model, the wall connecting node is T-shaped and is used for connecting 3T-shaped crossed wall connecting groove sections, and 3 notches 13 are arranged on the side wall of the notch section of the bored pile 1, opposite to the 3 wall connecting groove sections. The cross section shape of the part of the reinforcement cage 14 in the notch section 12 is correspondingly set according to the cross section shape of the notch section, corresponding grooves are formed in the reinforcement cage 14 opposite to each notch 13, and a reinforcement protection layer with a certain thickness is arranged on the periphery of the reinforcement cage.
Fig. 6 shows a third specific embodiment of the present utility model, where the wall-connecting node is Y-shaped and is used for connecting 3Y-shaped intersecting wall-connecting groove sections, and 3 notches 13 are provided on the side wall of the notch section of the bored pile 1 opposite to the 3 wall-connecting groove sections. The cross section shape of the part of the reinforcement cage 14 in the pile in the notch section is correspondingly set according to the cross section shape of the notch section, corresponding grooves are formed in the reinforcement cage 14 opposite to the positions of the notches 13, and a reinforcement protection layer with a certain thickness is arranged on the periphery of the reinforcement cage.
Fig. 7 shows a fourth embodiment of the present utility model, where the wall-connecting node is in a shape of a straight line and is used for connecting 2 straight line-shaped wall-connecting groove sections, and 2 notches 13 are arranged on the side wall of the notch section of the bored pile 1, opposite to the 2 wall-connecting groove sections. The cross section shape of the part of the reinforcement cage 14 in the pile in the notch section is correspondingly set according to the cross section shape of the notch section, corresponding grooves are formed in the reinforcement cage 14 opposite to the positions of the notches 13, and a reinforcement protection layer with a certain thickness is arranged on the periphery of the reinforcement cage.
As shown in fig. 2 to 7, the reinforcement cage 14 of the present utility model includes a vertical main bar 141, a circumferential stirrup 142, and an in-loop reinforcing bar 143. In specific implementation, part of the vertical main ribs 141 of the embedding section and the notch section can adopt a through-length structure, the annular stirrups 142 encircle the vertical main ribs and are welded with the vertical main ribs, the reinforcing ribs 143 in the rings are arranged in the reinforcement cage, one layer is horizontally arranged at intervals of a certain height, each layer is in a grid shape or in a triangle shape, and two ends of each reinforcing rib in each ring are respectively welded with the annular stirrups or the vertical main ribs.
Further, in order to increase the strength of the notch section, the density of the vertical main ribs 141 of the reinforcement cage in the notch section can be set to be larger than that of the main ribs of the embedded section, and the lower ends of the main ribs of the notch section, which are arranged in an encrypted manner, extend to a certain length in the embedded section and are welded with stirrups or reinforcing ribs in the embedded section.
As shown in fig. 8 to 11, when the pile type wall-connecting node of the present utility model is adopted, the construction method of the wall-connecting is as follows:
(1) Preparing a construction site, wherein the construction site comprises mechanical equipment, materials and materials, dividing the nodes of the diaphragm wall according to the construction of the diaphragm wall grid, and arranging node construction organizations;
(2) According to each node construction form, pre-processing a corresponding pile foundation reinforcement cage; the cross section size of the reinforcement cage is set according to the thickness requirement of the pile foundation cross section and the pile foundation reinforcement protection layer;
(3) Adopting a rotary drilling drill or a rotary drilling drill to carry out pile foundation drilling construction at the position of a designed node, assisting in high-quality slurry wall protection during drilling, and carrying out inclination measurement by ultrasonic waves after hole forming so as to ensure the perpendicularity of the pile, ensure the lowering precision of the reinforcement cage and avoid milling the reinforcement cage during later slot milling;
(4) Lowering a reinforcement cage in the pile hole, and adjusting the design position of each groove on the reinforcement cage to be opposite to each notch on the pile node when the reinforcement cage is lowered;
(5) And (3) pile concrete construction: pouring concrete in the pile hole to form a bored pile 1;
(6) Performing construction of the first-period wall section 2 of the diaphragm wall at a position with a certain distance from the node according to a conventional diaphragm wall construction method;
(7) After the first-stage groove concrete is equal in strength, constructing a second-stage wall section 3 between the first-stage wall section and a pile type node, firstly milling a second-stage groove hole by adopting a groove milling machine during construction, and milling corresponding joint notch 13 on the bored pile 1 during groove milling;
(8) A second-stage groove section reinforcement cage is lowered, and two sides of the second-stage reinforcement cage are respectively inserted into a joint notch 13 and a first-stage wall section reserved notch on the pile type node; and pouring the concrete of the secondary wall section to finish the construction of the secondary wall section 3, thereby forming a complete network-shaped ground continuous wall structure.
When pile type nodes are adopted for construction of the diaphragm wall, the nodes can be properly encrypted as required, one or more of the pile type nodes can be arranged on the straight diaphragm wall with longer length, one-stage wall sections are directly poured between the two nodes for connection, when the one-stage wall sections are grooved, joint notch is milled at the opposite sides of the two piles respectively, and two sides of a reinforcement cage of the one-stage wall section are inserted into the joint notch on the two nodes respectively.
In the concrete construction, in order to facilitate the milling of the groove at the groove opening position in the later stage, a groove opening steel plate can be arranged in the groove of the reinforcement cage before pile concrete is poured, and the size of the groove opening steel plate is consistent with that of a joint groove opening; and after the initial setting of the poured concrete, pulling out the notch steel plate. The gap formed after the notch steel plate is pulled out is convenient for positioning when the joint notch 13 is milled on the pile post in the later period.
Claims (7)
1. The utility model provides a stake formula ground even wall node which characterized in that: the ground continuous wall node is a large-diameter bored pile poured at the ground continuous wall node position, the bottom of the bored pile is lower than the bottom elevation of the ground continuous wall, the top of the bored pile is flush with the top elevation of the ground continuous wall, the part of the bored pile below the bottom elevation of the ground continuous wall is a built-in section, the cross section of the built-in section is circular, the part of the bored pile above the bottom elevation of the ground continuous wall is a notch section, the cross section of the notch section is arranged according to the shape of the node, corresponding notches are respectively arranged on the side wall of the notch section and opposite to each connected ground continuous wall groove section, the cross section of each notch is U-shaped, and the width of each notch is equal to the thickness of the ground continuous wall; the reinforced pile is characterized in that a reinforcement cage is arranged in the bored pile, the cross section of the reinforcement cage, which is positioned at the embedded section of the bored pile, is circular, a corresponding groove is formed in the side wall of the reinforcement cage, which is positioned at the notch section, corresponding to each notch, and the bored pile is provided with a reinforcement protection layer with a certain thickness.
2. A post-type wall joint according to claim 1, wherein: the underground wall connecting node is cross-shaped and is used for connecting 4 crisscross underground wall connecting groove sections, and 4 notches are formed in the side wall of the notch section of the bored pile, opposite to the 4 underground wall connecting groove sections.
3. A post-type wall joint according to claim 1, wherein: the underground wall connecting node is T-shaped and is used for connecting 3T-shaped crossed underground wall connecting groove sections, and 3 notches are formed in the side wall of the notch section of the bored pile, opposite to the 3 underground wall connecting groove sections.
4. A post-type wall joint according to claim 1, wherein: the underground wall connecting node is Y-shaped and is used for connecting 3Y-shaped crossed underground wall connecting groove sections, and 3 notches are formed in the side wall of the notch section of the bored pile, opposite to the 3 underground wall connecting groove sections.
5. A post-type wall joint according to claim 1, wherein: the underground wall connecting nodes are in a shape of a straight line and are used for connecting 2 horizontal underground wall connecting groove sections, and 2 notches are formed in the side wall of the notch section of the bored pile, opposite to the 2 underground wall connecting groove sections.
6. A post-type wall joint according to claim 1, wherein: the steel reinforcement cage includes vertical main muscle, hoop stirrup and circle internal reinforcement, and the hoop stirrup encircles vertical main muscle and welds with vertical main muscle, and the internal reinforcement of circle sets up in the steel reinforcement cage, and every certain altitude level sets up the one deck, and every layer is grid shape or triangle-shaped setting, and the strengthening rib both ends weld with hoop stirrup or vertical main muscle respectively in every circle.
7. A post-type diaphragm wall node according to claim 6, wherein: the main reinforcement density of the reinforcement cage in the notch section is greater than that of the embedded section, and the lower end of the main reinforcement arranged in an encrypted manner in the notch section extends to a certain length in the embedded section and is welded with the stirrups or the reinforcing ribs in the ring of the embedded section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320008446.3U CN219157638U (en) | 2023-01-03 | 2023-01-03 | Pile type ground wall joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320008446.3U CN219157638U (en) | 2023-01-03 | 2023-01-03 | Pile type ground wall joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219157638U true CN219157638U (en) | 2023-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320008446.3U Active CN219157638U (en) | 2023-01-03 | 2023-01-03 | Pile type ground wall joint |
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|---|---|
| CN (1) | CN219157638U (en) |
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2023
- 2023-01-03 CN CN202320008446.3U patent/CN219157638U/en active Active
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