WO2022199717A1 - Method for predicting influence of construction of pipe-jacking tunneling machine on safety of overlying pipeline - Google Patents
Method for predicting influence of construction of pipe-jacking tunneling machine on safety of overlying pipeline Download PDFInfo
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- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Definitions
- the invention relates to the field of infrastructure construction, in particular to a method for predicting the influence of a pipe jacking machine on the safety of an overlying pipeline during construction.
- pipe jacking machine construction is often used in underground construction because of its advantages such as less interference to the ground, fast construction speed, and reasonable cost.
- the pipelines are dense, and the pipe jacking machine is sometimes close to the overlying pipeline during construction, and the plane projections appear to intersect.
- the roadheader exerts pressure on the soil in front, and horizontal stress is generated at the overlying soil and the pipeline. Under the action of this stress, additional stress and deformation are generated inside the pipeline. If the additional stress is too large, or the deformation is too large, the pipeline will appear. Broken and destroyed. So far, there is no relevant method to predict the safety impact of the overlying pipeline during the construction of the pipe jacking machine.
- the purpose of the invention is to provide a method for predicting the influence of pipe jacking machine construction on the safety of overlying pipelines, so as to solve the problems raised in the above background technology.
- the present invention provides the following technical solutions:
- a method for predicting the influence of pipe jacking machine construction on the safety of an overlying pipeline comprising the following steps:
- z is the horizontal distance from the cutter head of the roadheader to the pipeline, and is the required physical quantity, that is, the independent variable;
- E is the elastic modulus of the material, which is determined according to the type of material
- the invention provides a method for predicting the influence of pipe jacking machine construction on the safety of an overlying pipeline, which has the advantages of strong flow, reliable prediction effect and accurate prediction result.
- the diameter B 0 of the cutter head of the pipe jacking machine is 3.0m, and the earth pressure p 0 applied by the cutter head of the roadheader when cutting the soil is 120kPa; further, the equivalent width b of the cutter head of the roadheader is determined.
- 0 is 2.66m; according to the construction elevation of the pipe jacking center and the elevation of the pipeline center, the vertical distance d 0 from the upper edge of the pipe jacking to the center of the pipeline is determined to be 1.0m; the value b 1 of the calculated width 1 is determined to be 1.33m, and the calculated length 1
- the maximum value p of the stress expression p(z) is 12.2kPa; according to pipeline materials and engineering experience, the allowable tensile strength [ ⁇ t ] is determined to be 270MPa; d is 82.7mm; it is determined
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Abstract
A method for predicting the influence of construction of a pipe-jacking tunneling machine on the safety of an overlying pipeline. The method comprises: first, by means of a diameter B0 of a cutter head of a tunneling machine, and a soil pressure p0 which is applied when the cutter head of the tunneling machine cuts a soil body, successively determining an equivalent width b0 of the cutter head of the tunneling machine, and an expression p(z), which is generated at a pipeline by a soil cutting pressure of the cutter head of the tunneling machine, of a horizontal additional stress; then, determining the allowable tensile strength [σt] of a pipeline material, the maximum tensile stress σt generated by the cutter head of the tunneling machine for the pipeline, and the maximum deformation amount δ generated by the cutter head of the tunneling machine for the pipeline; and finally, comparing [σt], σt and δ, and determining the influence of the cutter head of the tunneling machine on the safety of the pipeline. By means of the method of the present invention, provided is a method for predicting the influence of construction of a pipe-jacking tunneling machine on the safety of an overlying pipeline, and the method has a reliable prediction effect and an accurate prediction result.
Description
本发明涉及基础建设领域，具体是一种用于预测顶管掘进机施工时对上覆管线安全性影响的方法。The invention relates to the field of infrastructure construction, in particular to a method for predicting the influence of a pipe jacking machine on the safety of an overlying pipeline during construction.
在地下管道施工中，顶管掘进机施工因其对地面干扰小、施工速度快、造价合理等优点，在地下施工中经常被采用。然而，在城市地下空间中，管线密集，顶管掘进机施工时，有时与上覆管线距离较近，平面投影出现相交。此时掘进机对前方土体产生压力，上覆土体及管线处产生水平应力，在此应力作用下，管线内部产生附加应力和变形，若此附加应力过大，或者变形量太大，管线出现拉裂而破坏。迄今为止，对于顶管掘进机施工时对上覆管线安全性影响，尚未见到有关方法进行预测。In underground pipeline construction, pipe jacking machine construction is often used in underground construction because of its advantages such as less interference to the ground, fast construction speed, and reasonable cost. However, in the urban underground space, the pipelines are dense, and the pipe jacking machine is sometimes close to the overlying pipeline during construction, and the plane projections appear to intersect. At this time, the roadheader exerts pressure on the soil in front, and horizontal stress is generated at the overlying soil and the pipeline. Under the action of this stress, additional stress and deformation are generated inside the pipeline. If the additional stress is too large, or the deformation is too large, the pipeline will appear. Broken and destroyed. So far, there is no relevant method to predict the safety impact of the overlying pipeline during the construction of the pipe jacking machine.
发明内容SUMMARY OF THE INVENTION
本发明创造的目的在于提供一种顶管掘进机施工对上覆管线安全性影响预测方法，以解决上述背景技术中提出的问题。The purpose of the invention is to provide a method for predicting the influence of pipe jacking machine construction on the safety of overlying pipelines, so as to solve the problems raised in the above background technology.
为实现上述目的，本发明创造提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种顶管掘进机施工对上覆管线安全性影响预测方法，其步骤为：A method for predicting the influence of pipe jacking machine construction on the safety of an overlying pipeline, comprising the following steps:
(1)根据顶管施工方案，确定顶管掘进机刀盘直径B
0和掘进机刀盘对土体切削时施加的土压力p
0；
(1) According to the construction plan of pipe jacking, determine the diameter B 0 of the cutter head of the pipe jacking machine and the earth pressure p 0 applied when the cutter head of the tunnel machine cuts the soil;
(2)确定掘进机刀盘的等效宽度b
0：
(2) Determine the equivalent width b 0 of the cutter head of the roadheader:
(3)根据顶管中心的施工高程H
1以及管线中心的高程H
2，确定顶管上边缘至管线中心的垂直距离d
0：
(3) According to the construction elevation H 1 of the pipe jacking center and the elevation H 2 of the pipeline center, determine the vertical distance d 0 from the upper edge of the pipe jacking to the pipeline center:
d
0＝H
2-H
1-b
0/2
d 0 =H 2 -H 1 -b 0 /2
(4)确定计算宽度1的数值b
1和计算长度1的数值l
1：
(4) Determine the numerical value b 1 of the calculation width 1 and the numerical value l 1 of the calculation length 1 :
b
1＝b
0/2，l
1＝b
1+d
0
b 1 =b 0 /2, l 1 =b 1 +d 0
(6)确定计算宽度2的数值b
2和计算长度2的数值l
2：
(6) Determine the numerical value b 2 of the calculation width 2 and the numerical value l 2 of the calculation length 2 :
b
2＝b
0/2，l
2＝d
0
b 2 =b 0 /2, l 2 =d 0
(7)确定掘进机刀盘切削土压力在管线处产生的水平附加应力表达式p(z)：(7) Determine the horizontal additional stress expression p(z) generated by the cutting earth pressure of the roadheader cutter head at the pipeline:
其中，z为掘进机刀盘到管线的水平距离，为要求的物理量，即自变量；Among them, z is the horizontal distance from the cutter head of the roadheader to the pipeline, and is the required physical quantity, that is, the independent variable;
(8)确定水平附加应力表达式p(z)的最大值p：(8) Determine the maximum value p of the horizontal additional stress expression p(z):
对p(z)取导数p'(z)，令p'(z)＝0，求出其解z
0，将z
0代入到p(z)中，得到p；
Take the derivative p'(z) for p(z), set p'(z)=0, find its solution z 0 , and substitute z 0 into p(z) to obtain p;
(9)确定管线材料的允许抗拉强度[σ
t]、管线外径D、内径d：
(9) Determine the allowable tensile strength [σ t ] of the pipeline material, the outer diameter D of the pipeline, and the inner diameter d:
根据管线材料和工程指标，确定允许抗拉强度[σ
t]；由管线设计参数，确定出管线外径D、内径d；
According to the pipeline material and engineering index, determine the allowable tensile strength [σ t ]; According to the pipeline design parameters, determine the outer diameter D and inner diameter d of the pipeline;
(10)确定掘进机刀盘对管线产生的最大弯矩M：(10) Determine the maximum bending moment M generated by the cutter head of the roadheader on the pipeline:
(11)确定管线横截面对中性轴的惯性矩I
z：
(11) Determine the moment of inertia I z of the pipeline cross section to the neutral axis:
(12)确定掘进机刀盘对管线产生的最大拉应力σ
t：
(12) Determine the maximum tensile stress σ t generated by the cutter head of the roadheader on the pipeline:
(13)确定掘进机刀盘对管线产生的最大变形量δ：(13) Determine the maximum deformation δ of the roadheader cutter head to the pipeline:
其中，E为材料的弹性模量，根据材料种类确定；Among them, E is the elastic modulus of the material, which is determined according to the type of material;
(14)判定掘进机刀盘对管线的安全性影响：(14) Determine the safety impact of the roadheader cutter head on the pipeline:
若σ
t≤[σ
t]且δ≤[δ]，则管线安全；σ
t>[σ
t]或δ>[δ]，则管线不安全，其中，[δ]为允许变形量，取1.0cm。
If σ t ≤[σ t ] and δ≤[δ], the pipeline is safe; if σ t >[σ t ] or δ>[δ], the pipeline is unsafe, where [δ] is the allowable deformation, which is 1.0 cm.
本发明创造的有益效果是：The beneficial effects created by the present invention are:
本发明提供一种顶管掘进机施工对上覆管线安全性影响预测方法，具有流程性强、预 测效果可靠和预测结果准确的优点。The invention provides a method for predicting the influence of pipe jacking machine construction on the safety of an overlying pipeline, which has the advantages of strong flow, reliable prediction effect and accurate prediction result.
下面将结合本发明创造实施例，对本发明创造实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明创造一部分实施例，而不是全部的实施例。基于本发明创造中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明创造保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
实施例1：Example 1:
某城市修建地下综合管廊，埋设电力、雨水、污水等管线，采用顶管掘进机进行施工，顶管上方存在一条自来水管线，材质为Q235钢材。根据顶管施工方案，确定顶管掘进机刀盘直径B
0为3.0m，掘进机刀盘对土体切削时施加的土压力p
0为120kPa；进一步，确定掘进机刀盘的等效宽度b
0为2.66m；根据顶管中心的施工高程以及管线中心的高程，确定顶管上边缘至管线中心的垂直距离d
0为1.0m；确定计算宽度1的数值b
1为1.33m，计算长度1的数值l
1为2.33m；确定计算宽度2的数值b
2为1.33m，计算长度2的数值l
2为1.0m；确定掘进机刀盘切削土压力在管线处产生的水平附加应力表达式p(z)，对p(z)取导数p'(z)，令p'(z)＝0，求出其解z
0为2.1m，将z
0代入到p(z)中，得到水平附加应力表达式p(z)的最大值p为12.2kPa；根据管线材料和工程经验，确定出允许抗拉强度[σ
t]为270MPa；由管线设计资料，确定出管线外径D为90mm、内径d为82.7mm；确定掘进机刀盘对管线产生的最大弯矩M为14.28kN·m；确定管线横截面对中性轴的惯性矩I
z为9.25×10
-7m
4；确定掘进机刀盘对管线产生的最大拉应力σ
t为695MPa；自来水管线为钢材，其弹性模量为2100000MPa，确定掘进机刀盘对管线产生的最大变形量δ为0.2cm，[δ]取1.0cm；由于σ
t>[σ
t]，则在此顶管掘进机施工下该上覆管线不安全。
A city built an underground comprehensive pipe gallery, buried power, rainwater, sewage and other pipelines, and used a pipe jacking machine for construction. There is a tap water pipeline above the jacking pipe, which is made of Q235 steel. According to the pipe jacking construction plan, it is determined that the diameter B 0 of the cutter head of the pipe jacking machine is 3.0m, and the earth pressure p 0 applied by the cutter head of the roadheader when cutting the soil is 120kPa; further, the equivalent width b of the cutter head of the roadheader is determined. 0 is 2.66m; according to the construction elevation of the pipe jacking center and the elevation of the pipeline center, the vertical distance d 0 from the upper edge of the pipe jacking to the center of the pipeline is determined to be 1.0m; the value b 1 of the calculated width 1 is determined to be 1.33m, and the calculated length 1 The numerical value l 1 is 2.33m; the numerical value b 2 of the calculated width 2 is determined to be 1.33 m, and the numerical value l 2 of the calculated length 2 is 1.0 m; (z), take the derivative p'(z) with respect to p(z), set p'(z)=0, find the solution z 0 is 2.1m, substitute z 0 into p(z) to get the horizontal addition The maximum value p of the stress expression p(z) is 12.2kPa; according to pipeline materials and engineering experience, the allowable tensile strength [σ t ] is determined to be 270MPa; d is 82.7mm; it is determined that the maximum bending moment M generated by the cutter head of the roadheader to the pipeline is 14.28kN·m; the moment of inertia I z of the cross section of the pipeline to the neutral axis is determined to be 9.25×10 -7 m 4 ; The maximum tensile stress σ t generated by the disc to the pipeline is 695MPa; the water pipeline is made of steel, and its elastic modulus is 2,100,000MPa. It is determined that the maximum deformation δ of the roadheader cutter disc to the pipeline is 0.2cm, and [δ] is taken as 1.0cm; σ t >[σ t ], the overlying pipeline is unsafe under the construction of the pipe jacking machine.
Claims (1)
- 一种顶管掘进机施工对上覆管线安全性影响预测方法，其特征在于，其步骤为：A method for predicting the influence of pipe jacking machine construction on the safety of overlying pipelines, characterized in that the steps are:(1)确定顶管掘进机刀盘直径B 0和掘进机刀盘对土体切削时施加的土压力p 0； (1) Determine the diameter B 0 of the cutter head of the pipe jacking machine and the earth pressure p 0 applied by the cutter head of the machine to cut the soil;(2)确定掘进机刀盘的等效宽度b 0： (2) Determine the equivalent width b 0 of the cutter head of the roadheader:
(3)根据顶管中心的施工高程H 1以及管线中心的高程H 2，确定顶管上边缘至管线中心的垂直距离d 0： (3) According to the construction elevation H 1 of the pipe jacking center and the elevation H 2 of the pipeline center, determine the vertical distance d 0 from the upper edge of the pipe jacking to the pipeline center:d 0＝H 2-H 1-b 0/2 d 0 =H 2 -H 1 -b 0 /2(4)确定计算宽度1的数值b 1和计算长度1的数值l 1： (4) Determine the numerical value b 1 of the calculation width 1 and the numerical value l 1 of the calculation length 1 :b 1＝b 0/2，l 1＝b 1+d 0 b 1 =b 0 /2, l 1 =b 1 +d 0(6)确定计算宽度2的数值b 2和计算长度2的数值l 2： (6) Determine the numerical value b 2 of the calculation width 2 and the numerical value l 2 of the calculation length 2 :b 2＝b 0/2，l 2＝d 0 b 2 =b 0 /2, l 2 =d 0(7)确定掘进机刀盘切削土压力在管线处产生的水平附加应力表达式p(z)：(7) Determine the horizontal additional stress expression p(z) generated by the cutting earth pressure of the roadheader cutter head at the pipeline:
其中，z为掘进机刀盘到管线的水平距离，为要求的物理量，即自变量；Among them, z is the horizontal distance from the cutter head of the roadheader to the pipeline, and is the required physical quantity, that is, the independent variable;(8)确定水平附加应力表达式p(z)的最大值p：(8) Determine the maximum value p of the horizontal additional stress expression p(z):对p(z)取导数p'(z)，令p'(z)＝0，求出其解z 0，将z 0代入到p(z)中，得到p； Take the derivative p'(z) for p(z), set p'(z)=0, find its solution z 0 , and substitute z 0 into p(z) to obtain p;(9)确定管线材料的允许抗拉强度[σ t]、管线外径D、内径d： (9) Determine the allowable tensile strength [σ t ] of the pipeline material, the outer diameter D of the pipeline, and the inner diameter d:根据管线材料和工程指标，确定允许抗拉强度[σ t]；由管线设计参数，确定出管线外径D、内径d； According to the pipeline material and engineering index, determine the allowable tensile strength [σ t ]; According to the pipeline design parameters, determine the outer diameter D and inner diameter d of the pipeline;(10)确定掘进机刀盘对管线产生的最大弯矩M：(10) Determine the maximum bending moment M generated by the cutter head of the roadheader on the pipeline:
(11)确定管线横截面对中性轴的惯性矩I z： (11) Determine the moment of inertia I z of the pipeline cross section to the neutral axis:
(12)确定掘进机刀盘对管线产生的最大拉应力σ t： (12) Determine the maximum tensile stress σ t generated by the cutter head of the roadheader on the pipeline:
(13)确定掘进机刀盘对管线产生的最大变形量δ：(13) Determine the maximum deformation δ of the roadheader cutter head to the pipeline:
其中，E为材料的弹性模量，根据材料种类确定；Among them, E is the elastic modulus of the material, which is determined according to the type of material;(14)判定掘进机刀盘对管线的安全性影响：(14) Determine the safety impact of the roadheader cutter head on the pipeline:若σ t≤[σ t]且δ≤[δ]，则管线安全；σ t>[σ t]或δ>[δ]，则管线不安全，其中，[δ]为允许变形量，取1.0cm。 If σ t ≤[σ t ] and δ≤[δ], the pipeline is safe; if σ t >[σ t ] or δ>[δ], the pipeline is unsafe, where [δ] is the allowable deformation, which is 1.0 cm.
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| CN113283106A (en) * | 2021-06-10 | 2021-08-20 | 中铁九局集团有限公司 | Method for predicting influence of pipe-jacking tunneling machine construction on safety of overlying pipeline |
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| JP5189866B2 (en) * | 2008-03-18 | 2013-04-24 | 鹿島建設株式会社 | Drilling section soil layer judgment device and judgment method for shield machine |
| CN110263448B (en) * | 2019-06-24 | 2023-04-18 | 广西路桥工程集团有限公司 | Method for predicting influence of double-tunnel excavation on adjacent ground buried pipeline |
| CN111914333A (en) * | 2020-08-07 | 2020-11-10 | 浙大城市学院 | Calculation method for soil deformation caused by saturated soil shield construction considering existing building influence |
| CN112460328A (en) * | 2020-09-16 | 2021-03-09 | 江苏荣耀机械制造有限公司 | Construction method of pipe-jacking tunneling machine |
| CN112818510B (en) * | 2021-01-04 | 2023-12-22 | 浙江省大成建设集团有限公司 | Accurate method for predicting vertical displacement of foundation pit excavation to adjacent tunnel |
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|---|---|---|---|---|
| CN102129499A (en) * | 2011-03-15 | 2011-07-20 | 天津大学 | Calculation method of drive loads of cutterhead of tunnel borer |
| KR20200036961A (en) * | 2018-09-28 | 2020-04-08 | 주식회사 태웅 | Structural safety prediction method using large-scale jomini test |
| CN110378069A (en) * | 2019-08-01 | 2019-10-25 | 南京坤拓土木工程科技有限公司 | A method of prediction boring machine cutter accumulated quality loss late |
| CN110874512A (en) * | 2019-11-22 | 2020-03-10 | 辽宁石油化工大学 | Energy consumption-based shield tunneling machine tunneling efficiency calculation method |
| CN113283106A (en) * | 2021-06-10 | 2021-08-20 | 中铁九局集团有限公司 | Method for predicting influence of pipe-jacking tunneling machine construction on safety of overlying pipeline |
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