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A technology of measuring marks and marks, applied in the field of exploration, can solve the problems of poor stability of measuring control point marks, affecting the accuracy and reliability of measurement results, horizontal displacement of control point marks, etc.
Active Publication Date: 2009-04-01
WUHAN SURVEYING GEOTECHN RES INST OF MCC
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[0003] However, for areas with coastal soft soil foundations and very thick soft soil layers, such as Baosteel in Shanghai, Yueyufeng Steel Works in Zhuhai, Binhai New Area in Tianjin, Shougang in Caofeidian, etc., the soft soil layers in these coastal areas are generally very deep ( The Baosteel soft soil layer in Shanghai is more than 400 meters deep), and if the conventional shallow burial process is used for the measurement control point marks, the stability is poor, and the control point marks are prone to horizontal displacement and subsidence, which will affect the accuracy and reliability of the measurement results
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Embodiment 1
[0020] according to figure 1 Shown, a kind of deep pile measurement mark embedding method, its steps are as follows:
[0021] ①The embedding depth of the deep pile 1 should be designed according to the geological survey data. The bottom of the deep pile 1 is required to reach 2-5m in the bearing layer of the foundation, which is the same as the design depth of the pile foundation of the main buildings and structures;
[0022] ② Bored cast-in-situ piles, with a diameter of 1m, adopt mud retaining walls, and are suitable for embedding signs with a depth greater than 50m;
[0023] ③The top of the deep pile 1 is embedded with a stainless steel measuring core 2, and the upper part of the deep pile 1 is covered with a steel outer casing 3;
[0024] ④The space between the steel outer casing 3 and the deep pile 1 is filled with fine sand 4 to separate them;
[0025] ⑤ The top of the steel outer casing 3 is connected to the bottom of the protection tank 5, and the protection tank 5 i...
Embodiment 2
[0029] according to figure 1 Shown, a kind of deep pile measurement mark embedding method, its steps are as follows:
[0030] ①The embedding depth of the deep pile 1 should be designed according to the geological survey data. The bottom of the deep pile 1 is required to reach 2-5m in the bearing layer of the foundation, which is the same as the design depth of the pile foundation of the main buildings and structures;
[0031] ②Driving of PHC piles with a diameter of 400-550mm is suitable for embedding signs with a depth of 20-50m;
[0032] ③The top of the deep pile 1 is embedded with a stainless steel measuring core 2, and the upper part of the deep pile 1 is covered with a steel outer casing 3;
[0033] ④The space between the steel outer casing 3 and the deep pile 1 is filled with fine sand 4 to separate them;
[0034] ⑤ The top of the steel outer casing 3 is connected to the bottom of the protection tank 5, and the protection tank 5 is set outside the stainless steel measu...
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Abstract
The invention discloses a method for embedding a deep pile survey marker, which includes the follow steps: (1) the embedding depth of a deep pile (1) is designed; (2) marker embedment is carried out; (3) the top of the deep pile (1) is embedded into a stainless steel survey marker core (2) and the upper part of the deep pile (1) is sheathed with a steel outer sleeve (3); (4) silver sand (4) is filled between the steel outer sleeve (3) and the deep pile (1) so as to separate the steel outer sleeve (3) and the deep pile (1); (5) the top of the steel outer sleeve (3) is connected with the bottom of a protection pot (5) which is sheathed outside the stainless steel survey marker core (2); and (6) a concrete reinforcing bar is installed outside the steel outer sleeve (3), and then concrete (7) is poured; and after the concrete is well maintained, a ground part of a platform outside the concrete (7) is decorated by marble (8). The method has the advantages that: silver sand is filled between an upper platform and the deep pile so as to separate the upper platform and the deep pile to ensure that the deadweight of the upper platform is not transferred to the deep pile, namely that the deep pile is in a stable state without any load. When the upper platform is bumped by an external force, the stainless steel survey marker core is not influenced, which is of significance to construction survey with high precision in industrial factories.
Description
technical field [0001] The invention relates to the technical field of exploration, in particular to a method for embedding deep pile measurement marks. Background technique [0002] The stability of the measurement control points is the premise to ensure the reliability of the measurement results. The current norms stipulate the shallow burial (depth of about 1m) process and requirements for general control points. For the general measurement control points in areas with better foundation conditions In other words, it is basically feasible. [0003] However, for areas with coastal soft soil foundations and very thick soft soil layers, such as Baosteel in Shanghai, Yueyufeng Steel Works in Zhuhai, Binhai New Area in Tianjin, Shougang in Caofeidian, etc., the soft soil layers in these coastal areas are generally very deep ( The Baosteel soft soil layer in Shanghai is more than 400 meters deep), and if the conventional shallow burial technique is used for the measurement cont...
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