Layered dewatering construction structure and construction method for soft soil foundation
A technology of layered precipitation and soft soil foundation, applied in infrastructure engineering, construction, etc., can solve the problems of high construction cost, large number of tube wells, and elongated construction operation process
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Embodiment 1
[0055] refer to figure 1 , The layered dewatering construction structure of the soft soil foundation, including the well pipe 1, the inner casing pipe 2, the drive assembly, the closed pipe 3, the submersible deep well pump 4, the downwater pipe 5 and the switch valve 6.
[0056] The well pipe 1 includes a sedimentation pipe 11, a deep well part 12, a water stop section 13, a diving part 14 and a sealing section 15 from bottom to top. Located in the confined aquifer, the submerged part 14 is located in the submerged aquifer, and the submerged part 14 and the deep well part 12 are both water filter pipes with filter holes 2316 opened.
[0057] The diving part 14 and the deep well part 12 are filled with a filter material layer 17, the filter material of the filter material layer 17 can be filled with sand, and the water stop section 13 is filled with a water stop layer 18 composed of a water stop material, and the water stop material can be bentonite , for isolating the hydrau...
Embodiment 2
[0065] refer to Image 6 , Figure 7 and Figure 8 The difference between this embodiment and Embodiment 1 is that the structure of the drive assembly is different. In this embodiment, the drive assembly includes a lower plate 91, a handle bar 92, a force applying bar 93 and an extrusion bar 94, and the lower plate 91 and The handle bar 92 is integrally fixed, and the diameter of the lower plate 91 is larger than the diameter of the handle bar 92. The outer wall of the handle bar 92 away from the end of the lower plate 91 is provided with a handle 95. The handle 95 can be used for the hand-held drive assembly. The cavity 96 and the slideway 97 that runs through the side wall of the lower wall 91 and communicates with the installation cavity 96, there are several slideways 97, and several slideways 97 are arranged at intervals along the circumferential direction of the lower wall 91, and the handle bar 92 is coaxially provided with a mounting hole 98, The installation hole 98...
Embodiment 2
[0076] For embodiment 2, the specific steps of step 7) are:
[0077] refer to Image 6 and Figure 8 , the force application rod 93 moves downward, and the end of the force application rod 93 is screwed into the threaded hole 961, and the contact ball 99 on the force application rod 93 pushes the extrusion rod 94, so that the extrusion rod 94 is far away from the bottom plate 91 sliding movement, the extrusion rod 94 pushes the closed tube 3 to do the outward expansion movement, and finally realizes the extrusion of the closed tube 3 to the inner casing 2, and the inner casing 2 and the closed tube 3 cooperate with the deep well part 12 of the well pipe 1. Make a seal.
[0078] 8) Before the excavation of the foundation pit, turn on the submersible deep well pump 4 to dewater the submerged aquifer;
[0079] 9) Excavate the foundation pit. After the foundation pit is excavated to the depth that needs to be decompressed, the closed pipe 3 is loosened by the driving component, s...
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