CN210106749U - Counter-force structure of soft soil foundation super large section push pipe jacking operation - Google Patents
Counter-force structure of soft soil foundation super large section push pipe jacking operation Download PDFInfo
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- CN210106749U CN210106749U CN201920887481.0U CN201920887481U CN210106749U CN 210106749 U CN210106749 U CN 210106749U CN 201920887481 U CN201920887481 U CN 201920887481U CN 210106749 U CN210106749 U CN 210106749U
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- 239000002689 soil Substances 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000004567 concrete Substances 0.000 claims description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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Abstract
The utility model discloses a weak soil foundation super large section push pipe jacking operation's counter-force structure, including the basement of bottom plate and reinforcement bottom plate, the basement is for setting up the stirring stake under the bottom plate or spouting the stake soon, be equipped with the base of installation jack on the bottom plate, still be equipped with the rectangle steel member on the bottom plate, the equidistant butt of reaction end of each jack is at the preceding terminal surface of rectangle steel member, apply the counter-force to the rectangle steel member, rectangle steel member rear end face is equipped with the steel corbel that corresponds with jack, steel corbel and pre-buried reinforcing bar fixed connection in the basement, provide the counter-force to the rectangle steel member and support. The utility model discloses utilize stirring stake or spout soon the stake and replace conventional back wall way in the past with the basic anchor structure of prestressed anchorage pole combination, carry out the ground reinforcement through stirring stake or spout soon the stake on the one hand, on the other hand passes through embedded steel bar and transmits the effort to the soil layer in, makes anchor structure remain stable, can bear the jacking force that advances equipment production in the big section push pipe work progress of weak soil ground.
Description
Technical Field
The utility model relates to a field especially relates to a weak soil foundation super large section push pipe pushes up counter-force structure of advancing operation.
Background
The pipe jacking construction is that a jacking device such as a hydraulic jack is adopted, a tool pipe or a heading machine is lowered down from a starting well according to a designed gradient and is excavated to penetrate through a soil layer to be jacked into a receiving well for hoisting, and a prefabricated pipe joint is continuously extended and buried between two working wells after being tightly followed by the tool pipe or the heading machine under the jacking action of the jack, so that the non-excavation laying of underground pipelines is realized.
In underground pipe jacking construction, a back wall is a wall body used for resisting jacking counterforce in a working well and mainly provides enough supporting force for jacking equipment. In the whole construction process, all the pressure generated by the jacking pipes is concentrated on the back wall, so that the stability and the bearing capacity of the back rest have very important effects on the construction of the whole underground jacking pipe.
The conventional method of the front and rear back walls is a thick reinforced concrete wall, steel bars are bound with a lining wall during construction, and concrete is integrally poured. However, under the condition of penetrating through a shallow soil covered soft soil stratum, the jacking force of the jacking pipe with the ultra-large section far exceeds the jacking force of a back wall structure and a soil body of a conventional working well, and the instability damage is easily generated by adopting the conventional working well and the back wall form thereof during construction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a weak soil foundation super large section push pipe jacking operation's counter-force structure solves at present in the construction of the big section rectangle push pipe in weak soil area, and conventional back wall way can not satisfy the problem of push pipe jacking counter-force, provides the guarantee for safe construction.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that: a counter-force structure for pushing-in operation of a soft soil foundation ultra-large section jacking pipe comprises a base plate and a base for reinforcing the base plate, wherein a plurality of jacks which are transversely arranged in parallel are arranged on the base plate, a base for mounting the jacks is arranged on the base, at least one hoop for fixing the jacks is arranged on the base, rectangular steel members are also arranged on the base plate, the counter-force ends of the jacks are abutted to the front end face of each rectangular steel member at equal intervals to apply counter-force to the rectangular steel members, steel brackets corresponding to the jacks are arranged on the rear end face of each rectangular steel member, the steel brackets are fixedly connected with reinforcing steel bars pre-embedded in the base, and counter-force support is provided for the rectangular steel members;
the base is a stirring pile or a jet grouting pile arranged below the bottom plate, the height of the stirring pile or the jet grouting pile is six meters, a vertical prestressed anchor rod is pre-embedded in the stirring pile or the jet grouting pile, and the upper end of the prestressed anchor rod is embedded in the bottom plate to reinforce the bottom plate;
the steel bracket is right trapezoid steel member, and the right angle waist butt of steel bracket is equipped with a plurality of bolt holes on the rear end face of rectangle steel member, the terminal surface under the steel bracket, is equipped with high strength bolt in the bolt hole, pre-buried reinforcing bar is the HRB400 reinforcing bar of vertical setting in the basement, and HRB400 reinforcing bar upper end is buried the bottom plate and is connected with high strength bolt muffjoint, fixes the steel bracket.
Further, the bottom plate is formed by pouring C40 concrete.
Further, a plain concrete cushion layer is arranged between the bottom plate and the substrate, and the plain concrete cushion layer is C20 concrete with the thickness of 200 mm.
Furthermore, a steel box is embedded in the bottom plate and sleeved outside the HRB400 steel bars.
The utility model has the advantages that: the utility model discloses utilize stirring stake or spout stake soon and add the basic anchor structure of prestressed anchorage pole combination and replace conventional back wall way in the past, on the one hand carry out the ground reinforcement through stirring stake or spout stake soon, on the other hand transmits the effort to the soil layer through embedded bar in, make anchor structure remain stable, can bear the jacking force that advances equipment production in the big section push pipe work progress of weak soil ground, it is firm to ensure steel corbel support from aspects such as rigidity and intensity, transmission and the whole atress of assurance power, it can not provide effectual support or control for big section push pipe jacking to advance to have solved traditional back wall way and can not live the deformation scheduling problem, ensure the safety of push pipe engineering and go on smoothly.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the bottom plate and base of the present invention;
FIG. 3 is a bottom view of the steel corbel of the present invention;
fig. 4 is an installation schematic diagram of the steel corbel of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1-4, a counter-force structure for a soft soil foundation ultra-large section pipe jacking operation includes a bottom plate 1 and a base 2 for reinforcing the bottom plate 1, wherein the bottom plate 1 is provided with a plurality of jacks 3 (not shown) arranged in parallel in a transverse direction and a base 4 for mounting the jacks 3, the base 4 is provided with at least one hoop 5 for fixing the jacks 3, the bottom plate 4 is further provided with a rectangular steel member 6, the counter-force ends of the jacks 3 are abutted against the front end face of the rectangular steel member 6 at equal intervals to apply counter-force to the rectangular steel member 6, the rear end face of the rectangular steel member 6 is provided with a steel corbel 7 corresponding to the jack 3, the steel corbel 7 is fixedly connected with a steel bar 11 pre-embedded in the base 2 to provide counter-force support for the rectangular steel member 6;
as shown in fig. 2, the substrate 2 is a mixing pile or a jet grouting pile arranged below the bottom plate 1, the height of the mixing pile or the jet grouting pile is six meters, a vertical prestressed anchor 8 is embedded in the mixing pile or the jet grouting pile, and the upper end of the prestressed anchor 8 is embedded in the bottom plate to reinforce the bottom plate;
the steel corbel 7 is right trapezoid steel member, and the right angle waist butt of steel corbel 7 is equipped with a plurality of bolt holes 9 on the rear end face of rectangle steel member 6, and the terminal surface is equipped with high strength bolt 10 in the bolt hole 9 under the steel corbel 7, as shown in fig. 3, pre-buried reinforcing bar 11 is the HRB400 reinforcing bar of vertical setting in the basement 2, and HRB400 reinforcing bar upper end is buried bottom plate 1 and with high strength bolt 10 muffjoint, as shown in fig. 4, fixes steel corbel 7, transmits the reaction force of steel corbel 7 transmission to the soil layer in the while.
The bottom plate 1 is formed by pouring C40 concrete.
A plain concrete cushion layer 12 is arranged between the bottom plate 1 and the substrate 2, and the plain concrete cushion layer is C20 concrete with the thickness of 200 mm.
A steel box 13 is embedded in the bottom plate 1, and the HRB400 steel bars are sleeved with the steel box 13.
The utility model discloses utilize stirring stake or spout stake soon and add the basic anchor structure of prestressed anchorage pole combination and replace conventional back wall way in the past, on the one hand carry out the ground reinforcement through stirring stake or spout stake soon, on the other hand transmits the effort to the soil layer through embedded bar in, make anchor structure remain stable, can bear the jacking force that advances equipment production in the big section push pipe work progress of weak soil ground, it is firm to ensure steel corbel support from aspects such as rigidity and intensity, transmission and the whole atress of assurance power, it can not provide effectual support or control for big section push pipe jacking to advance to have solved traditional back wall way and can not live the deformation scheduling problem, ensure the safety of push pipe engineering and go on smoothly.
The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
Claims (4)
1. A counter-force structure for pushing-in operation of a soft soil foundation ultra-large section jacking pipe is characterized by comprising a base plate and a base for reinforcing the base plate, wherein a plurality of jacks which are transversely arranged in parallel are arranged on the base plate, a base for mounting the jacks is arranged on the base, at least one hoop for fixing the jacks is arranged on the base, rectangular steel members are also arranged on the base plate, the counter-force ends of the jacks are abutted against the front end face of each rectangular steel member at equal intervals to apply counter-force to the rectangular steel members, steel brackets corresponding to the jacks are arranged on the rear end face of each rectangular steel member, the steel brackets are fixedly connected with reinforcing steel bars pre-embedded in the base, and counter-force support is provided for the rectangular steel members;
the base is a stirring pile or a jet grouting pile arranged below the bottom plate, the height of the stirring pile or the jet grouting pile is determined according to a soil layer of a field, a vertical prestressed anchor rod is pre-embedded in the stirring pile or the jet grouting pile, and the upper end of the prestressed anchor rod is embedded in the bottom plate to reinforce the bottom plate;
the steel bracket is right trapezoid steel member, and the right angle waist butt of steel bracket is equipped with a plurality of bolt holes on the rear end face of rectangle steel member, the terminal surface under the steel bracket, is equipped with high strength bolt in the bolt hole, pre-buried reinforcing bar is the HRB400 reinforcing bar of vertical setting in the basement, and HRB400 reinforcing bar upper end is buried the bottom plate and is connected with high strength bolt muffjoint, fixes the steel bracket.
2. The counterforce structure of claim 1, wherein said bottom plate is cast of C40 concrete.
3. The counterforce structure of claim 1, wherein a plain concrete cushion layer is arranged between the bottom plate and the base, and the plain concrete cushion layer is 200mm thick C20 concrete.
4. The counterforce structure of claim 1, wherein a steel box is embedded in the bottom plate, and the steel box is sleeved outside the HRB400 steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920887481.0U CN210106749U (en) | 2019-06-13 | 2019-06-13 | Counter-force structure of soft soil foundation super large section push pipe jacking operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920887481.0U CN210106749U (en) | 2019-06-13 | 2019-06-13 | Counter-force structure of soft soil foundation super large section push pipe jacking operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210106749U true CN210106749U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920887481.0U Expired - Fee Related CN210106749U (en) | 2019-06-13 | 2019-06-13 | Counter-force structure of soft soil foundation super large section push pipe jacking operation |
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| CN (1) | CN210106749U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131479A (en) * | 2019-06-13 | 2019-08-16 | 福建工程学院 | A kind of counterforce structure of soft soil foundation large section push pipe jacking operation |
| CN111997089A (en) * | 2020-08-24 | 2020-11-27 | 陕西铭捷交通工程有限公司 | Construction method based on assembled self-balancing type pushing working pit system |
-
2019
- 2019-06-13 CN CN201920887481.0U patent/CN210106749U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131479A (en) * | 2019-06-13 | 2019-08-16 | 福建工程学院 | A kind of counterforce structure of soft soil foundation large section push pipe jacking operation |
| CN110131479B (en) * | 2019-06-13 | 2024-04-16 | 福建工程学院 | Reaction structure for jacking operation of soft soil foundation super-large section jacking pipe |
| CN111997089A (en) * | 2020-08-24 | 2020-11-27 | 陕西铭捷交通工程有限公司 | Construction method based on assembled self-balancing type pushing working pit system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200221 |