Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method of waterproof curtain between support piles penetrating through water-rich gravel layer
The invention relates to a construction method of a waterproof curtain between support piles penetrating through a water-rich gravel layer. The construction method comprises the specific steps that S1, a high-pressure rotary jet grouting point position is determined; s2, a hole guiding machine drives a hole guiding drill rod and a steel sleeve to guide a hole to the designed bottom elevation of the curtain; s3, a PVC protection pipe is put down; and S4, the high-pressure jet grouting drill rod is lowered to the designed bottom elevation of the curtain, and the waterproof curtain is formed through jet grouting from bottom to top. According to the construction method, in countries or regions with outdated waterproof curtain construction equipment, the method that holes are firstly guided, then the PVC protection pipe is used for protecting the wall, and finally, the high-pressure rotary jet grouting drill rod is used for conducting rotary jet grouting in the PVC protection pipe is adopted, so that the problem that construction of the waterproof curtain in a water-rich gravel layer is difficult is solved, rotary jet grouting is conducted between the reinforced concrete support piles to form the waterproof curtain, and the construction efficiency is improved. The compensation speed of underground water outside the pit into the pit is reduced, and favorable conditions are provided for precipitation in the pit.
本发明是一种穿越富水砾石层的支护桩桩间止水帷幕施作方法，具体步骤为：S1、高压旋喷注浆点位的确定；S2、引孔机带动引孔钻杆、钢套管引孔至帷幕设计底高程；S3、下放PVC护管；S4、下放高压旋喷钻杆至帷幕设计底高程，自下而上旋喷注浆形成止水帷幕。本发明在施工止水帷幕设备落后的国家或地区，用先引孔，再PVC护管护壁，最后高压旋喷钻杆在PVC护管内旋喷注浆的方法，解决了富水砾石层中止水帷幕施工困难的难题，在钢筋混凝土支护桩之间旋喷注浆形成止水帷幕，降低坑外地下水往坑内的补偿速度，为坑内降水提供有利条件。
Construction method of waterproof curtain between support piles penetrating through water-rich gravel layer
The invention relates to a construction method of a waterproof curtain between support piles penetrating through a water-rich gravel layer. The construction method comprises the specific steps that S1, a high-pressure rotary jet grouting point position is determined; s2, a hole guiding machine drives a hole guiding drill rod and a steel sleeve to guide a hole to the designed bottom elevation of the curtain; s3, a PVC protection pipe is put down; and S4, the high-pressure jet grouting drill rod is lowered to the designed bottom elevation of the curtain, and the waterproof curtain is formed through jet grouting from bottom to top. According to the construction method, in countries or regions with outdated waterproof curtain construction equipment, the method that holes are firstly guided, then the PVC protection pipe is used for protecting the wall, and finally, the high-pressure rotary jet grouting drill rod is used for conducting rotary jet grouting in the PVC protection pipe is adopted, so that the problem that construction of the waterproof curtain in a water-rich gravel layer is difficult is solved, rotary jet grouting is conducted between the reinforced concrete support piles to form the waterproof curtain, and the construction efficiency is improved. The compensation speed of underground water outside the pit into the pit is reduced, and favorable conditions are provided for precipitation in the pit.
本发明是一种穿越富水砾石层的支护桩桩间止水帷幕施作方法，具体步骤为：S1、高压旋喷注浆点位的确定；S2、引孔机带动引孔钻杆、钢套管引孔至帷幕设计底高程；S3、下放PVC护管；S4、下放高压旋喷钻杆至帷幕设计底高程，自下而上旋喷注浆形成止水帷幕。本发明在施工止水帷幕设备落后的国家或地区，用先引孔，再PVC护管护壁，最后高压旋喷钻杆在PVC护管内旋喷注浆的方法，解决了富水砾石层中止水帷幕施工困难的难题，在钢筋混凝土支护桩之间旋喷注浆形成止水帷幕，降低坑外地下水往坑内的补偿速度，为坑内降水提供有利条件。
Construction method of waterproof curtain between support piles penetrating through water-rich gravel layer
一种穿越富水砾石层的支护桩桩间止水帷幕施作方法
SONG LIWEI (Autor:in) / LIU XIAOMIN (Autor:in) / LI HUIHONG (Autor:in) / QIAO SHAOYONG (Autor:in) / CHEN XIAOWEI (Autor:in) / MIN SHULIANG (Autor:in)
06.12.2024
Patent
Elektronische Ressource
Chinesisch
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